阅读说明：本技术 图像模糊校正装置和成像设备 (Image blur correction device and imaging apparatus ) 是由 阿部广 于 2020-02-12 设计创作，主要内容包括：固定在壳体内的固定体、包括成像元件并在与光轴方向正交的方向上相对于所述固定体移动的可动体、以及具有安装在所述固定体和所述可动体上的部分并将所述可动体中产生的热量传递到所述固定体的可弯曲的传热片,并且所述传热片的厚度方向与所述光轴方向正交。因此,当所述可动体在与所述光轴方向正交的方向上相对于所述固定体移动时在所述传热片中不会发生扭转,因此在确保从所述可动体到所述固定体的传热状态良好之后可以抑制在所述可动体相对于所述固定体移动时施加到所述可动体上的载荷,从而促进电力消耗的降低。(The image pickup device includes a fixed body fixed in a case, a movable body including an imaging element and moving relative to the fixed body in a direction orthogonal to an optical axis direction, and a bendable heat transfer sheet having portions attached to the fixed body and the movable body and transferring heat generated in the movable body to the fixed body, and a thickness direction of the heat transfer sheet is orthogonal to the optical axis direction. Therefore, torsion does not occur in the heat transfer sheet when the movable body moves relative to the fixed body in the direction orthogonal to the optical axis direction, and therefore, after ensuring a good heat transfer state from the movable body to the fixed body, it is possible to suppress a load applied to the movable body when the movable body moves relative to the fixed body, thereby promoting a reduction in power consumption.)

1. An image blur correction device comprising:

a fixed body fixed within the housing;

a movable body that includes an imaging element and moves relative to the fixed body in a direction orthogonal to an optical axis direction; and

and a bendable heat transfer sheet having portions attached to the fixed body and the movable body and transferring heat generated in the movable body to the fixed body, wherein a thickness direction of the heat transfer sheet is orthogonal to the optical axis direction.

2. The image blur correction device according to claim 1, wherein a fixed-side mounting portion mounted on the fixed body, a movable-side mounting portion mounted on the movable body, and a deformation portion between the fixed-side mounting portion and the movable-side mounting portion are provided in the heat transfer sheet, wherein the deformation portion is formed in a curved shape.

3. The image blur correction device according to claim 2, wherein

The heat transfer sheet is formed by stacking a plurality of sheet-like members in the thickness direction.

4. The image blur correction device according to claim 3, wherein

The fixed-side mounting part and the movable-side mounting part are positioned opposite to each other, and

both ends of the deformation portion are connected to one end of the fixed-side mounting portion and one end of the movable-side mounting portion, respectively, and include a first portion connected to the fixed-side mounting portion and a second portion connected to the movable-side mounting portion, wherein

The first portion is bent at an acute angle with respect to the fixed-side mounting portion, and

the second portion is bent at an acute angle with respect to the movable-side mounting portion.

5. The image blur correction device according to claim 4, wherein

The heat transfer sheet is formed in a ring shape,

the deformation parts are arranged in pairs, and the deformation parts are arranged in pairs,

both ends of one of the deformation portions are connected to one end of the fixed-side mounting portion and one end of the movable-side mounting portion, respectively, and

both ends of the other of the deformed portions are connected to the other end of the fixed-side mounting portion and the other end of the movable-side mounting portion, respectively.

6. The image blur correction device according to claim 4, wherein

The heat transfer sheet is provided with at least two, and

at least one of the heat transfer sheets and at least another one of the heat transfer sheets are disposed in a direction orthogonal to the optical axis direction.

7. The image blur correction device according to claim 4, wherein

A flexible printed wiring board is connected to the movable body,

the flexible printed wiring board is bent in the optical axis direction such that respective portions of the flexible printed wiring board are opposed to each other, and

the fixed-side mounting portion and the movable-side mounting portion are positioned to face each other in a direction orthogonal to both the optical axis direction and the width direction of the flexible printed wiring board.

8. The image blur correction device according to claim 1, wherein

At least two heat transfer sheets are provided on the back surface side of the image forming element, and

the two heat transfer sheets are disposed on opposite sides of a center of the imaging element on a diagonal line of the imaging element.

9. The image blur correction device according to claim 1, wherein

A fixed side heat transfer plate is arranged in the fixed body,

a movable-side heat transfer plate is provided in the movable body, and

each part of the heat transfer sheet is attached to the fixed-side heat transfer plate and the movable-side heat transfer plate.

10. The image blur correction device according to claim 1, wherein a graphite sheet is used as the heat transfer sheet.

11. An image forming apparatus includes

An image blur correction device that corrects an image blur in such a manner that a movable body including an imaging element is moved relative to a fixed body fixed within a housing in a direction orthogonal to an optical axis direction, wherein the image blur correction device includes a bendable heat transfer sheet that has portions mounted on the fixed body and the movable body and transfers heat generated in the movable body to the fixed body, wherein a thickness direction of the heat transfer sheet is orthogonal to the optical axis direction.

Technical Field

The present technology relates to an image blur correction device for correcting an image blur by moving a movable body including an imaging element relative to a fixed body in a direction orthogonal to an optical axis direction, and an imaging apparatus including the image blur correction device.

Background

There are cases where an image blur correction device for correcting an image blur occurring at the time of imaging to improve the image quality is provided in an imaging apparatus such as a video camera and a still camera.

There is an image blur correction device having a configuration in which a movable body having an imaging element is moved relative to a fixed body in a direction orthogonal to an optical axis direction to perform image blur correction, and heat generated in the movable body when the movable body is moved relative to the fixed body is transferred to the fixed body through a heat transfer member (for example, refer to patent document 1).

The imaging element is configured as a part of an element unit together with a circuit board for driving the imaging element, heat is generated from the imaging element, the circuit board, and the like when the imaging element is driven, and the generated heat may affect the driving of the imaging element or affect a stable driving state of the circuit board. Therefore, by transferring heat from the movable body to the fixed body as described above, the influence of heat on the movable body is reduced to ensure a good operating state of the movable body and to ensure a stable driving state of the imaging element and the circuit board.

In the image forming apparatus disclosed in patent document 1, the fixed body and the movable body are connected by 4 flexible members serving as heat transfer members, heat is transferred from the movable body to the fixed body through the flexible members, and heat is radiated from the fixed body also serving as a heat radiation member. The flexible member is bent in accordance with the moving direction and the moving amount of the movable body when the movable body moves relative to the fixed body in the direction orthogonal to the optical axis direction to maintain the connected state of the fixed body and the movable body.

Reference list

Patent document

Patent document 1: JP5168047B

Disclosure of Invention

Technical problem

However, in the structure in which the fixed body and the movable body are connected by the heat transfer member, when the movable body moves relative to the fixed body in the direction orthogonal to the optical axis direction, since the heat transfer member bends in accordance with the movement of the movable body, torsion is generated, and therefore a reaction force that bends the heat transfer member is generated, and the generated reaction force is applied from the heat transfer member to the movable body as a load for the movement.

The load of such movement of the movable body becomes a driving load in the movable body, and it is necessary to increase the electric power required for the movement of the movable body according to the magnitude of the load, and the increase in the load leads to an increase in power consumption.

Therefore, an object of the image blur correction device and the imaging apparatus of the present technology is to promote reduction in power consumption by ensuring a good heat transfer state from the movable body to the fixed body and then suppressing a load applied to the movable body when the movable body moves relative to the fixed body.

Solution to the problem

First, an image blur correction device according to the present technology includes: the image pickup device includes a fixed body fixed in a case, a movable body including an imaging element and moving relative to the fixed body in a direction orthogonal to an optical axis direction, and a bendable heat transfer sheet having respective portions attached to the fixed body and the movable body and transferring heat generated in the movable body to the fixed body, wherein a thickness direction of the heat transfer sheet is orthogonal to the optical axis direction.

Therefore, when the movable body moves relative to the fixed body in a direction orthogonal to the optical axis direction, no twist occurs in the heat transfer sheet.

Second, in the above-described image blur correction device, it is desirable that a fixed-side mounting portion attached to the fixed body, a movable-side mounting portion attached to the movable body, and a deformation portion located between the fixed-side mounting portion and the movable-side mounting portion, which is formed in a curved shape, be provided in the heat transfer sheet.

Therefore, the deformation portion is easily deformed in accordance with the movement of the movable body with respect to the fixed body.

Third, in the above-described image blur correction device, it is desirable that the heat transfer sheet is formed by stacking a plurality of sheet-like members in the thickness direction.

Therefore, when the deformation portion has been deformed, the sheet-like member can be separated in the thickness direction, and the amount of heat transfer can be increased, and the deformation portion does not become excessively rigid even when the thickness is increased.

Fourth, in the above-described image blur correction device, it is desirable that the fixed-side mount portion and the movable-side mount portion are positioned opposite to each other, and both ends of the deformation portion are connected to one end of the fixed-side mount portion and one end of the movable-side mount portion, respectively, and include a first portion connected to the fixed-side mount portion and a second portion connected to the movable-side mount portion, wherein the first portion is bent at an acute angle with respect to the fixed-side mount portion, and the second portion is bent at an acute angle with respect to the movable-side mount portion.

Therefore, when the deformation portion has been deformed, the sheet-like member is easily separated in the thickness direction.

Fifth, in the above-described image blur correction device, it is desirable that the heat transfer sheet is formed in a ring shape, the deformation portions are provided in a pair, both ends of one of the deformation portions are connected to one end of the fixed-side mounting portion and one end of the movable-side mounting portion, respectively, and both ends of the other of the deformation portions are connected to the other end of the fixed-side mounting portion and the other end of the movable-side mounting portion, respectively.

Therefore, the pair of deformation portions are easily deformed equally.

Sixthly, in the above-described image blur correction device, it is desirable that at least two heat transfer sheets are provided, and at least one of the heat transfer sheets and at least another one of the heat transfer sheets are arranged in an orthogonal orientation in a direction orthogonal to the optical axis direction.

Therefore, the offset of the load in the specific moving direction of the movable body is reduced when the movable body moves relative to the fixed body.

Seventh, in the above-described image blur correction device, it is desirable that a flexible printed wiring board be connected to the movable body, the flexible printed wiring board be bent in the optical axis direction so that respective portions of the flexible printed wiring board oppose each other, and the fixed-side mounting portion and the movable-side mounting portion be positioned opposing each other in a direction orthogonal to both the optical axis direction and the width direction of the flexible printed wiring board.

Therefore, a load applied from the flexible printed wiring board to the movable body when the movable body moves relative to the fixed body in the width direction of the flexible printed wiring board is hardly amplified.

Eighth, in the above-described image blur correction device, it is desirable that at least two heat transfer sheets are provided on the back side of the imaging element, and that the two heat transfer sheets are arranged on opposite sides of the center of the imaging element on a diagonal line of the imaging element.

Therefore, the load generated in the two heat transfer sheets across the center of the imaging element is arranged on the diagonal line of the imaging element.

Ninth, in the image blur correction device, it is desirable that a fixed-side heat transfer plate is provided in the fixed body, a movable-side heat transfer plate is provided in the movable body, and each part of the heat transfer sheet is attached to the fixed-side heat transfer plate and the movable-side heat transfer plate.

Therefore, the heat generated in the movable body is transmitted to the fixed body through the fixed-side heat transfer plate, the heat transfer sheet, and the movable-side heat transfer plate.

Tenth, in the above-described image blur correction device, it is desirable that a graphite sheet be used as the heat transfer sheet.

Therefore, the heat transfer sheet has high heat resistance, low weight, and high tensile strength.

Eleventh, an imaging apparatus according to the present technology includes an image blur correction device that corrects an image blur in such a manner that a movable body including an imaging element is moved relative to a fixed body fixed inside a case in a direction orthogonal to an optical axis direction, wherein the image blur correction device includes a bendable heat transfer sheet that has portions mounted on the fixed body and the movable body and transfers heat generated in the movable body to the fixed body, and wherein a thickness direction of the heat transfer sheet is orthogonal to the optical axis direction.

Therefore, in the image blur correction device, when the movable body moves relative to the fixed body in a direction orthogonal to the optical axis direction, no twist occurs in the heat transfer sheet.

Drawings

Fig. 1 is a diagram showing an image blur correction device and an imaging apparatus of the present technology together with fig. 2 to 24, and is a perspective view of the imaging apparatus.

Fig. 2 is an exploded perspective view of the image blur correction device.

Fig. 3 is a perspective view of the image blur correction device.

Fig. 4 is an exploded perspective view of the image blur correction device from the opposite direction to fig. 2, with the second flexible printed wiring board and the third flexible printed wiring board omitted.

Fig. 5 is an exploded perspective view of the image blur correction device from the opposite direction to fig. 3, with the second flexible printed wiring board and the third flexible printed wiring board omitted.

Fig. 6 is a perspective view of the image blur correction device viewed in a direction opposite to that of fig. 3.

FIG. 7 is a perspective view of a heat transfer sheet.

Fig. 8 is a view showing an example of integrating the entire heat transfer sheet and a state of spreading the heat transfer sheet.

Fig. 9 is a view illustrating a deformed state of the heat transfer sheet together with fig. 10 to 14, and is a rear view of the heat transfer sheet before deformation.

Fig. 10 is a rear view showing a state of the sheet-like member when the heat transfer sheet has been deformed while the movable body is moving in the lateral direction.

Fig. 11 is a rear view showing the angles and reaction forces of the heat transfer sheet before deformation.

Fig. 12 is a rear view showing an angle in the heat transfer sheet when the heat transfer sheet has been deformed while the movable body is moved in the lateral direction.

Fig. 13 is a rear view showing a state when the movable body moves in one of the upward direction and the downward direction and thus the heat transfer sheet is deformed.

Fig. 14 is a rear view showing a state when the movable body moves in the other of the upward direction and the downward direction and thus the heat transfer sheet is deformed.

Fig. 15 is a rear view showing a first arrangement example of the heat transfer sheet.

Fig. 16 is a rear view showing a second arrangement example of the heat transfer sheet.

Fig. 17 is a view showing a modification of the heat transfer sheet together with fig. 18 to 23, and is a perspective view showing a first modification.

Fig. 18 is a perspective view showing a second modification.

Fig. 19 is a perspective view showing a third modification.

Fig. 20 is a rear view of the fourth modification.

Fig. 21 is a rear view of a fifth modification.

Fig. 22 is a rear view of the sixth modification.

Fig. 23 is a rear view showing a seventh modification.

Fig. 24 is a block diagram of the image forming apparatus.

Detailed Description

Hereinafter, forms of an image blur correction device and an imaging apparatus for implementing the present technology will be described with reference to the drawings.

In each form for realizing the present invention described below, the imaging apparatus of the present technology is applied to a still camera, and the image blur correction device of the present technology is applied to an image blur correction device provided in the still camera.

Further, the application range of the imaging apparatus and the image blur correction device of the present technology is not limited to a still camera and an image blur correction device provided in the still camera. The imaging apparatus and the image blur correction device of the present technology can be widely applied to imaging apparatuses included in various electronic apparatuses such as cellular phones and portable information terminals or image blur correction devices provided in these imaging apparatuses.

In the following description, it is assumed that a forward direction, a backward direction, an upward direction, a downward direction, and a lateral direction are represented in a direction viewed by a photographer when imaging using a still camera. Therefore, the subject side becomes the front side, and the photographer side becomes the back side.

However, the forward direction, the backward direction, the upward direction, the downward direction, and the lateral direction to be shown below are for convenience of description, and the implementation of the present technology is not limited to these directions.

In addition, the lenses to be expressed below include a lens configured as a single lens and a lens configured as a lens group of a plurality of lenses.

< schematic configuration of image Forming apparatus >

The imaging apparatus 1 includes a main body 2 and a lens barrel 60 (refer to fig. 1). The lens barrel 60 is, for example, a replaceable lens detachably attached to the main body 2. Further, the present technology is also applicable to a type in which a lens unit having the same structure as the internal structure of the lens barrel 60 is incorporated inside the main body and a foldable type in which the lens unit is protruded from or retracted into the main body.

The main body 2 includes each necessary portion disposed inside or outside the housing 3.

For example, the various operation portions 4, … … are disposed on the upper surface and the back surface of the housing 3. For example, a power button, a shutter button, a zoom knob, a mode switching knob, and the like are provided as the operation units 4, … ….

A display (display unit), not shown, is disposed on the rear surface of the housing 3.

A circular opening 3a is formed in the front surface of the housing 3, and a peripheral portion of the opening 3a is provided as a mounting portion 5 for mounting the lens barrel 60.

The lens barrel 60 includes an approximately cylindrical outer cylinder 61 having an axial direction corresponding to the front-rear direction, and respective necessary portions mounted on or supported by the inside and outside of the outer cylinder 61. The axial direction of the lens barrel 60 corresponds to the optical axis direction of the entire imaging apparatus 1.

The rear end of the outer cylinder 61 is provided with a projection 62 for mounting. The lens barrel 60 is fitted into the main body 2 by coupling a projection 62 for mounting to the mount portion 5, for example, according to a bayonet coupling.

Operation rings 63, 63 serving as a zoom ring and a focus ring are provided in the lens barrel 60. The operation rings 63, 63 are rotatably supported by the outer cylinder 61, and zooming and focusing are performed by rotating the operation rings 63, 63.

The lens barrel 60 includes, for example, a plurality of lenses (lens groups) 64, …. Furthermore, fig. 1 illustrates only the front-most lens 64. The lenses 64, … … are positioned in the optical axis direction (front-rear direction), respectively, and include a movable lens (movable lens group) that can move in the optical axis direction and a fixed lens (fixed lens group) that cannot move in the optical axis direction.

< construction of image blur correction apparatus >

The image blur correction device 6 for correcting an image blur is disposed in the main body 2 (see fig. 1). The image blur correction device 6 includes a fixed body 7 and a movable body 8 (see fig. 2 to 5). The image blur correction device 6 corrects an image blur by moving the movable body 8 relative to the fixed body 7 in a direction orthogonal to the optical axis direction.

The fixed body 7 includes a base plate 9, first magnets 10, second magnets 11, … …, a first fixed-side heat transfer plate 12, and a second fixed-side heat transfer plate 13.

The base plate 9 includes a base portion 14 facing the front-rear direction formed in a plate shape, a first regulating portion 15 projecting forward from an upper end of the base portion 14, and a second regulating portion 16 projecting forward from a lateral portion on one side of the base portion 14.

The opening 14a is formed to penetrate the base 14 front and rear. A lateral portion on the side of the base portion 14 opposite to the side where the second regulating portion 16 is provided as the first magnet mounting portion 14b, and a lower end of the base portion 14 is provided as the second magnet mounting portion 14 c.

Cylindrical restricting projections 17, … … are mounted on the periphery of the front surface of the base 14. For example, four stopper projections 17, 17 … … are provided, one mounted at the upper end of the lateral portion of the base portion 14 on the side opposite to the side where the second stopper portion 16 is provided, and three separately and laterally mounted at the lower end of the base portion 14.

The two first magnets 10 are formed in a longitudinally elongated shape, arranged laterally, and mounted on the first magnet mounting portion 14b of the base plate 9. The second magnet 11 is formed in a laterally elongated shape and laterally separated, and two second magnets 11 are each vertically arranged and mounted on the second magnet mounting portion 14c of the base plate 9.

The first fixed-side heat transfer plate 12 is formed of, for example, a metal material having high thermal conductivity, and is constituted by a mounting plate portion 12a that extends laterally facing the front-rear direction, and a mounting plate portion 12b that projects forward from a lower end of the mounting plate portion 12 a. In the first fixed-side heat transfer plate 12, a mounting plate portion 12a is mounted on a base portion 14 from the back of the upper side of an opening 14a in the base plate 9, and a mounting plate portion 12b protrudes from the opening 14a to the side in front of the base portion 14.

The second fixed-side heat transfer plate 13 is formed of, for example, a metal material having high thermal conductivity, and is constituted by a laterally elongated mounting plate portion 13a facing the front-rear direction, and a mounting plate portion 13b projecting forward from an upper end of the mounting plate portion 13 a. In the second fixed-side heat transfer plate 13, a mounting plate portion 13a is mounted on the base portion 14 from the back surface of the lower side of the opening 14a in the base plate 9, and a mounting plate portion 13b protrudes from the opening 14a to the side in front of the base portion 14. Further, the first fixing-side heat transfer plate 12 and the second fixing-side heat transfer plate 13 may be formed integrally with the base plate 9.

The movable body 8 includes an element unit 18, a first movable-side heat transfer plate 19, and a second movable-side heat transfer plate 20.

The element unit 18 is configured such that each necessary portion is mounted on the holding base 21 or supported by the holding base 21. The holding base 21 is formed in a substantially rectangular frame shape. A substantially rectangular-shaped holding frame 22 is mounted on the front surface of the holding base 21.

The imaging element 23 is held on the inner sides of the holding base 21 and the holding frame 22. For example, a Charge Coupled Device (CCD), a Complementary Metal Oxide Semiconductor (CMOS), or the like may be used as the imaging element 23.

A plate base 24 formed in a rectangular plate shape is attached to the back surface of the holding base 21. The circuit board 25 is mounted on a portion other than the outer periphery on the back surface of the board base 24.

A frame 26 covering the outer periphery of the circuit board 25 is mounted on the outer periphery of the back surface of the holding base 21. The frame 26 includes a rectangular frame-like portion 27, a first coil mounting portion 28 projecting laterally from a portion near the rear end of the frame-like portion 27, and a second coil mounting portion 29 projecting downward from a portion near the rear end of the frame-like portion 27.

Arrangement notches 26a, … … are formed in the first coil mounting part 28 and the second coil mounting part 29 in the frame 26. The placement notches 26a, … … are positioned to be vertically or laterally spaced apart.

A longitudinally elongated first coil 30 is mounted on the first coil mounting 28 and laterally elongated second coils 31, 31 are laterally spaced and mounted on the second coil mounting 29.

The first movable-side heat transfer plate 19 is formed of, for example, a metal material having high thermal conductivity, and is constituted by a mounting plate portion 19a that extends in the lateral direction facing the front-rear direction, and a mounting plate portion 19b that protrudes rearward from the lower end of the mounting plate portion 19 a. In the first movable-side heat transfer plate 19, the mounting plate portion 19a is mounted on a portion on the upper end side of the circuit board 25 from the back surface by a heat radiation sheet not shown.

The second movable-side heat transfer plate 20 is formed of, for example, a metal material having high thermal conductivity, and is constituted by a mounting plate portion 20a that extends laterally facing the front-rear direction, and a mounting plate portion 20b that protrudes rearward from an upper end of the mounting plate portion 20 a. In the second movable-side heat transfer plate 20, the mounting plate portion 20a is mounted on a portion on the lower end side of the circuit board 25 from the back surface by a heat radiation sheet not shown. Further, the first movable-side heat transfer plate 19 and the second movable-side heat transfer plate 20 may be formed integrally with a part (e.g., the frame 26) of the element unit 18.

The movable body 8 configured as above is supported by the fixed body 7 on the front surface side of the base plate 9 so that the movable body 8 can move in the direction orthogonal to the optical axis direction.

In a state where the movable body 8 is supported by the fixed body 7, the frame-like portion 27 of the frame 26 is located on the inner surface side of the first and second restrictions 15, 16 of the base plate 9, and the restriction protrusions 17, … … mounted on the base plate 9 are located at the arrangement notches 26a, … …, respectively, and therefore, excessive movement of the movable body 8 relative to the fixed body 7 in the direction orthogonal to the optical axis direction is restricted by the first and second restrictions 15, 16 and the restriction protrusions 17, … ….

In a state where the movable body 8 is supported by the fixed body 7, the pressure plate 32 is attached to the regulating projections 17, … … from the front side by screwing or the like. The platen 32 is formed of a vertically extending longitudinal extension 32a and a laterally extending transverse extension 32b in a generally L-shape. In a state where the pressing plate 32 is mounted on the restricting projections 17, …, the first coil 30 is received from the front side by the longitudinally extending portion 32a, and the second coils 31, 31 are received from the front side by the transversely extending portion 32 b.

A pressing plate 32 is fitted on the restricting projections 17, 17 from the front side to prevent the movable body 8 from being detached from the fixed body 7 to the front side.

The first and second coils 30 and 31 of the movable body 8 are positioned opposite to the first and second magnets 10 and 11, 11 and … … of the fixed body 7, respectively.

The first flexible printed wiring board 33 is connected to each predetermined portion in a state where the movable body 8 is supported by the fixed body 7. The first flexible printed wiring board 33 has a thickness direction corresponding to the front-rear direction, and includes a first connection portion 34 extending vertically, a second connection portion 35 extending laterally, and a conductive portion 36 arranged in a row (in-line) with the first connection portion 34 in the lateral direction, and the lower end of the first connection portion 34 and the lower end of the conductive portion 36 are connected with one end of the second connection portion 35 in the lateral direction.

In the first flexible printed wiring board 33, the first connection portion 34 is connected to the first coil 30 from the front side, and the second connection portion 35 is connected to the second coils 31 and 31 from the front side. The conductive portion 36 is bent such that the respective portions face each other in the optical axis direction (front-rear direction), a portion thereof extends rearward from the opening portion 14a of the substrate 9, and an end portion thereof is connected to a drive circuit board (power supply board), not shown, disposed on the rear side of the fixed body 7.

Current is supplied from the drive circuit board to the first coil 30 and the second coils 31 and 31 through the first flexible printed wiring board 33.

When current is supplied to the first coil 30, the movable body 8 moves in the lateral direction relative to the fixed body 7 in association with the magnetic field generated by the first magnet 10, and when current is supplied to the second coils 31 and 31, the movable body 8 moves in the up-down direction relative to the fixed body 7 in association with the magnetic field generated by the second magnet 11. Here, when current is supplied to the second coils 31 and 31 in opposite directions, an upward thrust is generated by one of the second coils 31 and one of the second magnets 11 and 11, a downward thrust is generated by the other of the second coils 31 and the other of the second magnets 11 and 11, and the movable body 8 moves relative to the fixed body 7 in directions inclined in the upward, downward, and lateral directions. Therefore, the movable body 8 can move relative to the fixed body 7 in any direction in a plane orthogonal to the optical axis direction.

In addition, the second flexible printed wiring board 37 and the third flexible printed wiring board 38 are connected to the circuit board 25 in a state of being arranged in the lateral direction (see fig. 6) in a state where the movable body 8 is supported by the fixed body 7. The second flexible printed wiring board 37 and the third flexible printed wiring board 38 have a thickness direction corresponding to the front-rear direction and are bent such that respective portions are opposed to each other in the optical axis direction, a portion of which extends rearward from the opening 14a of the substrate 9, and the other end of which is connected to a drive circuit board (power supply board). For example, signal transmission between the circuit board 25 and the drive circuit board is performed by the second flexible printed wiring board 37 and the third flexible printed wiring board 38.

The first heat transfer fins 39 are mounted on the first fixed-side heat transfer plate 12 mounted on the base plate 9 in the fixed body 7 and the first movable-side heat transfer plate 19 mounted on the circuit board 25 in the movable body 8 (see fig. 4 to 6).

The first heat transfer sheet 39 is formed of a plurality of sheet-like members 40, 40, … … (refer to fig. 7) made of, for example, graphite. The first heat transfer sheet 39 is formed by overlapping the sheet-like members 40, … … in the thickness direction, bending it into a predetermined shape, and joining both ends of the sheet-like members 40, 40 … … in the longitudinal direction to form a loop shape penetrating front and back.

The first heat transfer fin 39 is constituted by a fixed-side mounting portion 43 and a movable-side mounting portion 44 that are vertically positioned with respect to each other, and a pair of deformation portions 45, 45 between the fixed-side mounting portion 43 and the movable-side mounting portion 44.

The fixed-side mounting portion 43 and the movable-side mounting portion 44 face in the up-down direction, the fixed-side mounting portion 43 is located above the movable-side mounting portion 44, the fixed-side mounting portion 43 is joined to the bottom surface of the mounting plate portion 12b in the first fixed-side heat transfer plate 12, and the movable-side mounting portion 44 is joined to the top surface of the mounting plate portion 19b in the first movable-side heat transfer plate 19.

The deformed portions 45, 45 are positioned laterally apart, the upper ends of the deformed portions 45, 45 are connected to the left and right ends of the fixed-side mounting portion 43, respectively, and the lower ends of the deformed portions 45, 45 are connected to the left and right ends of the movable-side mounting portion 44, respectively. Approximately the upper half of the deformation portion 45 is provided as a first portion 45a, and approximately the lower half thereof is provided as a second portion 45b, the first portion 45a being bent at an acute angle with respect to the fixed-side mounting portion 43, and the second portion 45b being bent at an acute angle with respect to the movable-side mounting portion 44. The lower end of the first portion 45a of the deformation portion 45 is connected to the upper end of the second portion 45b, and the connecting portion 45c is bent in a direction opposite to the bending direction of the first portion 45a with respect to the fixed-side mounting portion 43 and the bending direction of the second portion 45b with respect to the movable-side mounting portion 44. Therefore, the deformed portions 45, 45 are formed in a V shape that opens outward in the lateral direction, and the distance between the connecting portions 45c, 45c is shorter than the length of the fixed-side mounting portion 43 and the movable-side mounting portion 44 in the lateral direction.

As described above, since the deforming portions 45, 45 of the first heat transfer sheet 39 are not engaged with any portion of the fixed body 7 and the movable body 8, the deforming portions 45, 45 can be deformed when the movable body 8 moves relative to the fixed body 7 in the direction orthogonal to the optical axis direction.

In the first heat transfer sheet 39, at least the deformed portions 45, 45 overlap in a state where the plurality of sheet member components 40, … … are not joined. The fixed-side mounting portion 43 and the movable-side mounting portion 44 are overlapped in a state where the plurality of sheet-like members 40, … … are joined or in a state where they are not joined.

In addition, the second heat transfer sheet 46 is mounted on the second fixed-side heat transfer plate 13 mounted on the base plate 9 in the fixed body 7 and the second movable-side heat transfer plate 20 mounted on the circuit board 25 in the movable body 8 in a state where the second heat transfer sheet 46 is arranged laterally. The second heat transfer sheet 46 has the same configuration as the first heat transfer sheet 39 and is arranged in an inverted state with respect to the first heat transfer sheet 39.

The second heat transfer sheet 46 is formed by overlapping a plurality of sheet-like members 47, … … made of, for example, graphite in the thickness direction, bending them into a predetermined shape, and joining both ends of the sheet-like members 47, 47 … … in the longitudinal direction to form a front-rear penetrating ring shape.

The second heat transfer sheet 46 is constituted by a fixed-side mounting portion 50 and a movable-side mounting portion 51 positioned vertically opposite to each other, and a pair of deformation portions 52, 52 located between the fixed-side mounting portion 50 and the movable-side mounting portion 51.

The fixed-side mounting portion 50 and the movable-side mounting portion 51 face in the up-down direction, the fixed-side mounting portion 50 is located below the movable-side mounting portion 51, the fixed-side mounting portion 50 is joined to the top surface of the mounting plate portion 13b in the second fixed-side heat transfer plate 13, and the movable-side mounting portion 51 is joined to the bottom surface of the mounting plate portion 20b in the second movable-side heat transfer plate 20.

The deformed portions 52, 52 are positioned laterally apart, the lower ends of the deformed portions 52, 52 are connected to the left and right ends of the fixed-side mounting portion 50, respectively, and the upper ends of the deformed portions 52, 52 are connected to the left and right ends of the movable-side mounting portion 51, respectively. Approximately the lower half of the deformation portion 52 is provided as a first portion 52a, and approximately the upper half thereof is provided as a second portion 52b, the first portion 52a being bent at an acute angle with respect to the fixed-side mounting portion 50, and the second portion 52b being bent at an acute angle with respect to the movable-side mounting portion 51. The upper end of the first portion 52a of the deformation portion 52 is connected to the lower end of the second portion 52b, and the connecting portion 52c is bent in a direction opposite to the bending direction of the first portion 52a with respect to the fixed-side mounting portion 50 and the bending direction of the second portion 52b with respect to the movable-side mounting portion 51. Therefore, the deformed portions 52, 52 are formed in a V shape that opens outward in the lateral direction, and the distance between the connecting portions 52c, 52c is shorter than the length of the fixed-side mounting portion 50 and the movable-side mounting portion 51 in the lateral direction.

As described above, since the deformation portions 52, 52 of the second heat transfer sheet 46 are not engaged with any portion of the fixed body 7 and the movable body 8, the deformation portions 52, 52 can be deformed when the movable body 8 moves relative to the fixed body 7 in the direction orthogonal to the optical axis direction.

In the second heat transfer sheet 46, at least the deformed portions 52, 52 overlap in a state where the plurality of sheet-like member components 47, … … are not joined. The fixed-side mounting portion 50 and the movable-side mounting portion 51 overlap in a state where the plurality of sheet-like members 47, … … are joined or in a state where they are not joined.

As described above, the respective portions of the first heat transfer sheet 39 are joined to the first fixed-side heat transfer plate 12 mounted on the substrate 9 and the first movable-side heat transfer plate 19 mounted on the circuit board 25, and thereby the fixed body 7 and the movable body 8 are connected by the first heat transfer sheet 39. Further, the respective portions of the second heat transfer sheet 46 are joined to the second fixed-side heat transfer plate 13 mounted on the substrate 9 and the second movable-side heat transfer plate 20 mounted on the circuit board 25, and thereby the fixed body 7 and the movable body 8 are also connected by the second heat transfer sheet 46.

One end of a first heat conductive sheet, not shown, made of graphite or the like is attached to the mounting plate portion 12a of the first fixed-side heat transfer plate 12 from the rear surface. One end of a second heat conductive sheet, not shown, made of graphite or the like is attached to the mounting plate portion 13a of the second fixed-side heat transfer plate 13 from the back surface. The other end of the first heat-conductive sheet and the other end of the second heat-conductive sheet are mounted on, for example, the inner surface of the housing 3.

The integrated first heat transfer sheet 39 and the integrated second heat transfer sheet 46 are, for example, integrally formed (see fig. 8).

In this case, each of the integrated first heat transfer sheet 39 and the integrated second heat transfer sheet 46 may be integrally formed by, for example, overlapping graphite sheets formed into a predetermined shape into a plate shape to form the base 53 and by bending a predetermined portion of the base 53 in a predetermined direction.

By integrally forming the integrated first heat transfer sheet 39 and the integrated second heat transfer sheet 46, it is possible to promote improvement in workability in the manufacturing process of the image blur correction device 6 and reduction in the number of components of the image blur correction device 6.

< operation in image Forming apparatus >

In the image forming apparatus 1 configured as above, the image forming element 23 is in a driving state (particularly, the image forming element 23 and the circuit board 25 are in a state where power has been applied at the time of image formation, and the like), and thus heat is generated from the movable body 8. The heat generated in the movable body 8 is transferred from the first movable-side heat transfer plate 19 and the second movable-side heat transfer plate 20 to the first fixed-side heat transfer plate 12 and the second fixed-side heat transfer plate 13 via the first heat transfer sheet 39 and the second heat transfer sheet 46. The heat transferred to the first fixing-side heat transfer plate 12 and the second fixing-side heat transfer plate 13 is transferred to the case 3 from the first thermally conductive sheet mounted on the mounting plate portion 12a of the first fixing-side heat transfer plate 12 and the second thermally conductive sheet mounted on the mounting plate portion 13a of the second fixing-side heat transfer plate 13 and radiated from the case 3 to the outside.

Therefore, the temperature of the movable body 8 (particularly, the imaging element 23 and the circuit board 25) rises in a curved shape, thereby ensuring a good driving state of the imaging element 23, the circuit board 25, and the like.

At the time of the above-described imaging or the like, the blur correction operation is performed in accordance with the movement of the movable body 8 relative to the fixed body 7 in the direction orthogonal to the optical axis direction. In the blur correction operation, the deformed portions 45, 45 of the first heat transfer sheet 39 and the deformed portions 52 and 52 of the second heat transfer sheet 46 are deformed in accordance with the movement of the movable body 8 relative to the fixed body 7.

Here, since the thickness direction of the first heat transfer sheet 39 and the second heat transfer sheet 46 is orthogonal to the optical axis direction and no torsion occurs in the deformed deformation portions 45 and 52, the load generated in the first heat transfer sheet 39 and the second heat transfer sheet 46 is small, and the load (driving load) applied to the movable body 8 from the first heat transfer sheet 39 and the second heat transfer sheet 46 is small.

< deformation State of Heat transfer sheet >

Hereinafter, the deformed states of the first heat transfer sheet 39 and the second heat transfer sheet 46 will be described (refer to fig. 9 to 14). Further, the deformed states of the first heat transfer sheet 39 and the second heat transfer sheet 46 are the same, because the first heat transfer sheet 39 and the second heat transfer sheet 46 have only a difference in inverted arrangement therebetween, and therefore only the deformed state of the first heat transfer sheet 39 will be described below.

In the first heat transfer sheet 39, the deformation portion 45 is overlapped in a state where the plurality of sheet-like members 40, … … are not joined, the first portion 45a and the second portion 45b of the deformation portion 45 are bent at acute angles to the fixed-side mounting portion 43 and the movable-side mounting portion 44, respectively, and the connection portion 45c is bent in a direction opposite to the bending direction of the first portion 45a with respect to the fixed-side mounting portion 43 and the bending direction of the second portion 45b with respect to the movable-side mounting portion 44 (refer to fig. 9).

Therefore, the sheet-like members 40, … in the deformed portion 45 are liable to generate a gap therebetween in the thickness direction, and almost no gap is generated between the sheet-like members 40, … at the edge 45d on the one side and the edge 45e on the other side in the up-down direction, but the gap between the sheet-like members 40, … … is maximized in the connecting portion 45c, so that the deformed portion 45 is in a flexible state, i.e., a state liable to be deformed.

When the movable body 8 moves in the lateral direction with respect to the fixed body 7 and the force F is applied to the first heat transfer fins 39 in the lateral direction, the movable-side mounting portion 44 is displaced in the lateral direction with respect to the fixed-side mounting portion 43, and the deforming portions 45 and 45 are deformed (refer to fig. 10). Here, although the sheet-like members 40, … … have gaps therebetween in the deformed portion 45, particularly the connecting portion 45c has a large gap, and the gap between the sheet-like members 40, 40 … … is reduced in accordance with the deformation of the deformed portion 45, the gap between the sheet-like members 40, … … is also maintained in a state in which the deformed portion 45 has been deformed.

Therefore, the deformed portion 45 as a whole maintains a flexible state, the load generated in the deformed portion 45 is small, and the load (driving load) applied from the first heat transfer sheet 39 to the movable body 8 when the movable body 8 moves in the lateral direction with respect to the fixed body 7 is small.

In addition, the first heat transfer sheet 39 is formed by overlapping the plurality of sheet-like members 40, … in an unbonded state and bonding both ends of the sheet-like members 40, … in the longitudinal direction to form a loop penetrating front and back.

Therefore, a reaction force from the inside to the outside of the loop shape is generated in the first heat transfer fin 39, which is a reaction force for returning to the equilibrium length state before the engagement of both ends of the sheet-like member 40, … … in the longitudinal direction. Therefore, a reaction force P is generated in the deforming portion 45, and the edge 45d on the one side and the edge 45e on the other side in the vertical direction are displaced in opposite directions by the reaction force P (see fig. 11).

When the movable body 8 moves in the lateral direction with respect to the fixed body 7 and the force F is applied to the first heat transfer fins 39 in the lateral direction, the movable-side mounting portion 44 is displaced in the lateral direction with respect to the fixed-side mounting portion 43, and the deforming portions 45 and 45 are deformed (refer to fig. 12). Here, when it is assumed that the angles of the first portions 45a and 45a with respect to the fixed-side mounting portion 43 are a1 and a2 and the angles of the second portions 45B and 45B with respect to the movable-side mounting portion 44 are B1 and B2, when the deformation portion 45 has been deformed, the first portion 45a on the one side and the second portion 45B on the other side are displaced in a state where the angles a1 and B2 increase, and the first portion 45a on the other side and the second portion 45B on the one side are displaced in a state where the angles a2 and B1 decrease.

Here, the force of the reaction force P becomes a force assisting force in a direction in which the angles a1 and B2 increase, and becomes a force opposite to the assisting force in a direction in which the angles a2 and B1 decrease.

As described above, when the movable body 8 moves in the lateral direction relative to the fixed body 7, the reaction force P becomes a force that assists the force and a force opposite to the assist force, but the reaction force P not only becomes the assist force, and therefore, the load generated in the first heat transfer fin 39 is small.

Therefore, the generation of the reaction P in the first heat transfer sheet 39 does not result in the generation of a large load in the deformation portion 45, and thus the load (driving load) applied from the first heat transfer sheet 39 to the movable body 8 when the movable body 8 moves in the lateral direction with respect to the fixed body 7 is small.

In addition, as described above, all the conductive portions 36 of the first flexible printed wiring board 33, the second flexible printed wiring board 37, and the third flexible printed wiring board 38 are bent so that the respective portions oppose each other in the optical axis direction (front-rear direction) in the image blur correction device 6. Therefore, when the movable body 8 moves in the lateral direction with respect to the fixed body 7, torsion occurs in all the conductive portions 36 of the first flexible printed wiring board 33, the second flexible printed wiring board 37, and the third flexible printed wiring board 38, and the generated torsion becomes a load with respect to the movement of the movable body 8.

However, in the image blur correction device 6, since the fixed-side mounting portion 43 and the movable-side mounting portion 44 are positioned to be vertically opposed to each other and the first heat transfer sheet 39 is arranged in the state where the deformation portions 45 and 45 are arranged laterally, as described above, the load generated in the lateral direction in the first heat transfer sheet 39 is small, and the load applied from the first heat transfer sheet 39 to the movable body 8 in the moving direction of the movable body 8 is small. Therefore, the load applied to movable body 8 from conductive portion 36 or the like when movable body 8 moves relative to fixed body 7 in the width direction (lateral direction) of conductive portion 36 or the like is hardly amplified, and therefore a smooth moving state of movable body 8 relative to fixed body 7 can be ensured.

Meanwhile, although the force generated when the first heat transfer sheet 39 is arranged in the state where the deforming portions 45 and 45 are arranged laterally and the movable body 8 is moved in the lateral direction with respect to the fixed body 7 has been described, the first heat transfer sheet 39 may be arranged in the state where the deforming portions 45, 45 are arranged vertically, in which case the load (driving load) applied from the first heat transfer sheet 39 to the movable body 8 when the movable body 8 is moved in the up-down direction with respect to the fixed body 7 is reduced.

On the other hand, when the movable body 8 moves in the up-down direction relative to the fixed body 7 in a state where the first heat transfer sheet 39 having the laterally arranged deformation portions 45 and 45 is arranged, the deformation portions 45 and 45 are deformed to expand/contract (refer to fig. 13 and 14).

In this case, when the deforming portion 45 is in the contracted state, as shown in fig. 13, a force Q1 that pushes back the movable body 8 is generated in the deforming portion 45, a load is applied to the movable body 8 in a direction opposite to the moving direction, and the load applied from the first heat transfer sheet 39 to the movable body 8 is liable to increase when the movable body 8 moves in the lateral direction. However, since the gaps between the sheet-like members 40, … … increase in the deformed portion 45, the deformed portion 45 as a whole is maintained in a flexible state, a large load is hardly generated in the deformed portion 45, and the load (driving load) applied to the movable body 8 from the first heat transfer sheet 39 does not excessively increase when the movable body 8 moves in the up-down direction relative to the fixed body 7.

On the contrary, when the deforming portion 45 is in the expanded state, as shown in fig. 14, a force Q2 that pulls back the movable body 8 is generated in the deforming portion 45, a load is applied to the movable body 8 in a direction opposite to the moving direction, and the load applied from the first heat transfer sheet 39 to the movable body 8 is liable to increase when the movable body 8 moves in the lateral direction. However, both the angle a formed between the first portion 45a and the fixed-side mounting portion 43 and the angle B formed between the second portion 45B and the fixed-side mounting portion 43 increase, and therefore the reaction force P becomes a force that assists the force when the movable body 8 moves in the up-down direction relative to the fixed body 7.

Therefore, the reaction force P generated in the first heat transfer fins 39 does not cause a load to be generated in the deformation portion 45, and the load (driving load) applied from the first heat transfer fins 39 to the movable body 8 does not excessively increase when the movable body 8 moves in the up-down direction relative to the fixed body 7.

Further, as described above, the movable body 8 also moves relative to the fixed body 7 in a direction inclined with respect to the upward direction, the downward direction, and the lateral direction. In this case, the above-described composite operation state of the moving operation of the movable body 8 in the lateral direction and the moving operation in the up-down direction is generated, but as described above, the load (driving load) applied to the movable body 8 from the first heat transfer fins 39 is small in both the moving operation of the movable body 8 in the lateral direction and the moving operation in the up-down direction. Therefore, when the movable body 8 is moved in a direction inclined with respect to the upward direction, the downward direction, and the lateral direction, the load (driving load) applied from the first heat transfer fins 39 to the movable body 8 is also small.

Meanwhile, since the second heat transfer sheet 46 is different from the first heat transfer sheet 39 only in the inverted configuration but has the same configuration as the first heat transfer sheet 39, the load generated in the second heat transfer sheet 46 is the same as the load generated in the first heat transfer sheet 39, and the load generated when the movable body 8 moves relative to the fixed body 7 is small.

< effects due to the Structure of the Heat transfer sheet >

As described above, the first heat transfer sheet 39 and the second heat transfer sheet 46 are formed by overlapping the plurality of sheet-like members 40, … …, 47, … … in the thickness direction.

Therefore, when the deforming portions 45 and 52 have been deformed, the sheet-like members 40, … …, 47, … … can be separated in the thickness direction, so that the load of the first heat transfer sheet 39 and the second heat transfer sheet 46 with respect to the movement of the movable body 8 can be reduced when the movable body 8 moves with respect to the fixed body 7, and reduction in power consumption can be promoted. Further, since the plurality of sheet-like members 40, … …, 47, … … overlap in the thickness direction, the deformation portions 45 and 52 do not become excessively rigid even when the thickness thereof increases, and therefore it is possible to maintain the flexible state of the deformation portions 45 and 52 to suppress the generation of load and increase the heat transfer amount.

Further, in the deformed portions 45 and 52, the first portions 45a and 52a are bent at an acute angle with respect to the fixed-side mounting portions 43 and 50, and the second portions 45b and 52b are bent at an acute angle with respect to the movable-side mounting portions 44 and 51.

Therefore, when the deforming portions 45 and 52 have been deformed, the sheet-like members 40, … …, 47, … … are liable to separate in the thickness direction, and thereby the load of the first heat transfer sheet 39 and the second heat transfer sheet 46 with respect to the movement of the movable body 8 can be further reduced when the movable body 8 moves with respect to the fixed body 7, and further reduction in power consumption can be promoted.

Further, the first heat transfer sheet 39 and the second heat transfer sheet 46 are formed in a ring shape, the deformation portions 45 and 52 are provided as a pair, both ends of one of the deformation portions 45 and 52 are connected to one end of the fixed-side mounting portions 43, 50 and one end of the movable-side mounting portions 44, 51, respectively, and both ends of the other of the deformation portions 45, 52 are connected to the other ends of the fixed-side mounting portions 43 and 50 and the other ends of the movable-side mounting portions 44 and 51, respectively.

Therefore, since the pair of deformation portions 45, 52 are deformed equally, it is difficult to generate a load that is biased to the first heat transfer sheet 39 and the second heat transfer sheet 46, and therefore a smooth moving state of the movable body 8 with respect to the fixed body 7 can be ensured.

Further, the first fixed-side heat transfer plate 12 and the second fixed-side heat transfer plate 13 are provided in the fixed body 7, the first movable-side heat transfer plate 19 and the second movable-side heat transfer plate 20 are provided in the movable body 8, and a portion of the first heat transfer sheet 39 and a portion of the second heat transfer sheet 46 are mounted on the first fixed-side heat transfer plate 12 or the second fixed-side heat transfer plate 13 and the first movable-side heat transfer plate 19 or the second movable-side heat transfer plate 20, respectively.

Therefore, the heat generated in the movable body 8 is transmitted to the fixed body 7 through the first or second fixed-side heat transfer plate 12 or 13, the first or second heat transfer sheet 39 or 46, and the first or second movable-side heat transfer plate 19 or 20. Therefore, the first fixed-side heat transfer plate 12, the second fixed-side heat transfer plate 13, the first movable-side heat transfer plate 19, and the second movable-side heat transfer plate 20 can be formed in shapes corresponding to the shapes of the first heat transfer sheet 39 and the second heat transfer sheet 46, and the heat generated in the movable body 8 can be efficiently transferred to the fixed body 7 regardless of the shapes of the first heat transfer sheet 39 and the second heat transfer sheet 46.

Further, although the example in which one first heat transfer sheet 39 and one second heat transfer sheet 46 are arranged has been described above, the number of the first heat transfer sheets 39 and the second heat transfer sheets 46 arranged in the image blur correction device 6 is arbitrary, and at least one of the first heat transfer sheets 39 and the second heat transfer sheets 46 may be arranged. Further, a plurality of first heat transfer fins 39 and a plurality of second heat transfer fins 46 may be provided.

In addition, the positions where the first heat transfer sheet 39 and the second heat transfer sheet 46 are arranged are also arbitrary, and therefore the first heat transfer sheet 39 and the second heat transfer sheet 46 may be arranged vertically apart, the first heat transfer sheet 39 and the second heat transfer sheet 46 may be arranged laterally apart, or the first heat transfer sheet 39 and the second heat transfer sheet 46 may be arranged apart in a direction inclined with respect to the upward direction, the downward direction, and the lateral direction.

Further, only either one of the first heat transfer sheet 39 and the second heat transfer sheet 46 may be disposed, only a plurality of the first heat transfer sheets 39 may be disposed, or only a plurality of the second heat transfer sheets 46 may be disposed. In this case, the position of each of the first heat transfer sheet 39 and the second heat transfer sheet 46 is also arbitrary.

Further, although it has been described above that the first heat transfer sheet 39 is constituted by the fixed-side mounting portion 43, the movable-side mounting portion 44, and the pair of deformation portions 45, 45 and the second heat transfer sheet 46 is constituted by the fixed-side mounting portion 50, the movable-side mounting portion 51, and the pair of deformation portions 52, each of the first and second heat transfer sheets may be configured to have one or at least three deformation portions 45 or 52.

< example of arrangement of Heat transfer sheet >

Hereinafter, a configuration example of the heat transfer sheet will be explained (refer to fig. 15 and 16). Further, in order to simplify the following description, the first heat transfer sheet 39 and the second heat transfer sheet 46 will be described as the heat transfer sheets 70, the fixed-side mounting portions 43 and 50 will be described as the fixed-side mounting portions 71, the movable-side mounting portions 44 and 51 will be described as the movable-side mounting portions 72, and the deformation portions 45 and 52 will be described as the deformation portions 73.

In the first configuration example, the fixed-side mounting portion 71 and the movable-side mounting portion 72 of at least one heat transfer sheet 70 are arranged vertically, the deformed portions 73 and 73 thereof are arranged laterally, the fixed-side mounting portion 71 and the movable-side mounting portion 72 of at least another heat transfer sheet 70 are arranged laterally, the deformed portions 73 and 73 thereof are arranged vertically, and at least two heat transfer sheets 70 and 70 are arranged in an orthogonal orientation in a direction orthogonal to the optical axis direction (refer to fig. 15). Therefore, the fixed-side mounting portion 71 and the movable-side mounting portion 72 of one of the heat transfer sheets 70 are arranged in parallel to a first direction orthogonal to the optical axis direction, and the fixed-side mounting portion 71 and the movable-side mounting portion 72 of the other heat transfer sheet 70 are arranged in parallel to a second direction orthogonal to the optical axis direction and the first direction.

In this case, the load applied to the movable body 8 from the heat transfer sheet 70 having the deformation portions 73 and 73 arranged laterally is small when the movable body 8 is moved in the lateral direction relative to the fixed body 7, and the load applied to the movable body 8 from the heat transfer sheet 70 having the deformation portions 73 and 73 arranged vertically is small when the movable body 8 is moved in the up-down direction relative to the fixed body 7.

Therefore, when the movable body 8 is moved relative to the fixed body 7 in any one of the lateral direction and the up-down direction, the load applied from the heat transfer sheet 70 to the movable body 8 does not excessively increase.

By disposing at least the heat transfer sheets 70 and 70 in the orthogonal direction in this way, the load biased in the specific moving direction of the movable body 8 is reduced when the movable body 8 moves relative to the fixed body 7, and therefore a smooth moving state of the movable body 8 relative to the fixed body 7 can be ensured.

In the second arrangement example, the two heat transfer sheets 70 and 70 are arranged on opposite sides across the center S of the imaging element 23 on the diagonal line T of the imaging element 23 (refer to fig. 16).

In this case, the load generated in the two heat transfer sheets 70 and 70 is dispersed on both sides of the center S of the imaging element 23 between the two heat transfer sheets 70 and 70 on the diagonal line T of the imaging element 23, and therefore a load that is offset to the movable body 8 is hardly generated and a smooth moving state of the movable body 8 with respect to the fixed body 7 can be ensured.

Specifically, in the image blur correction device 6, the drive unit is composed of the second magnets 11 and the second coil 31 to move the movable body 8 in the up-down direction with respect to the fixed body 7, and the two drive units are disposed and arranged in a laterally separated state. Since the two heat transfer sheets 70 and 70 are configured to be disposed on opposite sides across the center S of the imaging element 23 on the diagonal line T of the imaging element 23, the loads applied from the heat transfer sheets 70 and 70 to the two drive units are distributed, and therefore, reduction in power consumption can be promoted.

Further, the number of heat transfer sheets 70 arranged in the image blur correction device 6 is arbitrary, and at least one heat transfer sheet 70 may be arranged. In addition, when a plurality of heat transfer sheets 70 are arranged, the arrangement position is also arbitrary, and therefore, the plurality of heat transfer sheets 70 may be arranged vertically divided, the plurality of heat transfer sheets 70 may be arranged laterally divided, or the plurality of heat transfer sheets 70 may be arranged in a direction inclined with respect to the upward direction, the downward direction, and the lateral direction.

< modification of Heat transfer sheet >

Hereinafter, a modified example of the heat transfer sheet will be explained (refer to fig. 17 to 23). Further, for the sake of simplifying the following explanation, the first heat transfer sheet 39 and the second heat transfer sheet 46 will be described as heat transfer sheets 70(70A, 70B, … …), the fixed-side mounting portions 43 and 50 will be described as fixed-side mounting portions 71(71A, 71B, … …), the movable-side mounting portions 44, 51 will be described as movable-side mounting portions 72(72A, 72B, … …), and the deformation portions 45, 52 will be described as deformation portions 73(73A, 73B, … …). Further, the first fixed-side heat transfer plate 12 and the second fixed-side heat transfer plate 13 will be described as the first heat transfer plate 80(80A, 80B, … …), and the first movable-side heat transfer plate 19 and the second movable-side heat transfer plate 20 will be described as the second heat transfer plate 90(90A, 90B, … …).

The heat transfer sheets 70A according to the first modification to 80G according to the seventh modification described below each have a thickness direction orthogonal to the optical axis direction (front-rear direction).

The heat transfer sheet 70A according to the first modification includes the fixed-side mounting portion 71A, the movable-side mounting portion 72A, and the deformation portion 73A, and is mounted on the first heat transfer plate 80A and the second heat transfer plate 90A (refer to fig. 17). The first heat transfer plate 80A includes a mounting plate portion 80x facing the front-rear direction and a mounting plate portion 80y facing the up-down direction, and the second heat transfer plate 90A includes a mounting plate portion 90x facing the front-rear direction and a mounting plate portion 90y facing the up-down direction. In the heat transfer sheet 70A, the fixed-side mounting portion 71A and the movable-side mounting portion 72A are mounted on the mounting plate portion 80y and the mounting plate portion 90y, respectively, and the deformation portion 73A is formed in a curved shape. In the heat transfer sheet 70A, the fixed-side mounting portion 71A and the movable-side mounting portion 72A are mounted on the first heat transfer plate 80A and the second heat transfer plate 90A in a state where the fixed-side mounting portion 71A and the movable-side mounting portion 72A face in the up-down direction.

The heat transfer sheet 70B according to the second modification has a fixed-side mounting portion 71B, a movable-side mounting portion 72B, and a deformation portion 73B, and is mounted on the first heat transfer plate 80B and the second heat transfer plate 90B (refer to fig. 18). The first heat transfer plate 80B includes a mounting plate portion 80x facing the front-rear direction, a connecting portion 80z facing the up-down direction, and a mounting plate portion 80y facing the lateral direction, and the second heat transfer plate 90B includes a mounting plate portion 90x facing the front-rear direction and a mounting plate portion 90y facing the up-down direction. In the heat transfer sheet 70B, the fixed-side mounting portion 71B and the movable-side mounting portion 72B are mounted on the mounting plate portion 80y and the mounting plate portion 90y, respectively, and the deformation portion 73B is formed in a curved shape. In the heat transfer sheet 70B, the fixed-side mounting portion 71B is mounted on the first heat transfer plate 80B with the fixed-side mounting portion 71B facing in the lateral direction, and the movable-side mounting portion 72B is mounted on the second heat transfer plate 90B with the movable-side mounting portion 72B facing in the vertical direction.

Further, in the heat transfer sheet 70B according to the second modified example, the fixed-side mounting portions 71B may be mounted on the first heat transfer plates 80B with the fixed-side mounting portions 71B facing in the up-down direction, and the movable-side mounting portions 72B may be mounted on the second heat transfer plates 90B with the movable-side mounting portions 72B facing in the lateral direction.

The heat transfer sheet 70C according to the third modification includes the fixed-side mounting portion 71C, the movable-side mounting portion 72C, and the modification portion 73C, and is mounted on the first heat transfer plate 80C and the second heat transfer plate 90C (see fig. 19). The first heat transfer plate 80C includes a mounting plate portion 80x facing the front-rear direction, a connecting portion 80z facing the up-down direction, and a mounting plate portion 80y facing the lateral direction, and the second heat transfer plate 90C includes a mounting plate portion 90x facing the front-rear direction, a connecting portion 90z facing the up-down direction, and a mounting plate portion 90y facing the lateral direction. In the heat transfer sheet 70C, the fixed-side mounting portion 71C and the movable-side mounting portion 72C are mounted on the mounting plate portion 80y and the mounting plate portion 90y, respectively, and the deformation portion 73C is formed in a curved shape. In the heat transfer sheet 70C, the fixed-side mounting portion 71C and the movable-side mounting portion 72C are mounted on the first heat transfer plate 80C and the second heat transfer plate 90C, respectively, with the fixed-side mounting portion 71C and the movable-side mounting portion 72C facing in the lateral direction.

Further, in the heat transfer sheet 70A according to the first modification, the heat transfer sheet 70B according to the second modification, and the heat transfer sheet 70C according to the third modification, the fixed-side mounting portions 71A, 71B, and 71C and the movable-side mounting portions 72A, 72B, and 72C may be mounted on the first heat transfer plates 80A, 80B, and 80C and the second heat transfer plates 90A, 90B, and 90C in a state in which one or both of the fixed-side mounting portions 71A, 71B, and 71C and the movable-side mounting portions 72A, 72B, and 72C are inclined with respect to the up-down direction and the lateral direction.

The heat transfer sheet 70D according to the fourth modification includes the fixed-side mounting portion 71D, the movable-side mounting portion 72D, and the deformation portion 73D, and is mounted on the first heat transfer plate 80D and the second heat transfer plate 90D (refer to fig. 20). In the fourth modification, for example, a pair of heat transfer sheets 70D and 70D is provided. The first heat transfer plate 80D includes a mounting plate portion 80x facing the front-rear direction, a connecting portion 80z facing the up-down direction, and mounting plate portions 80y and 80y inclined with respect to the up-down direction and the lateral direction, and the second heat transfer plate 90D includes a mounting plate portion 90x facing the front-rear direction, a connecting portion 90z facing the up-down direction, and mounting plate portions 90y and 90y inclined with respect to the up-down direction and the lateral direction. The mounting plate portions 80y and 80y are in the opposite direction to the inclination direction of the mounting plate portions 90y and are inclined, for example, by 45 degrees with respect to the up-down direction.

In the heat transfer sheet 70D, the fixed-side mounting portion 71D and the movable-side mounting portion 72D are mounted on the mounting plate portion 80y and the mounting plate portion 90y, respectively, and the deformation portion 73D is bent at the middle thereof and formed in a horizontally-lying V-shape. In the heat transfer sheets 70D and 70D, the middle portions of the deformation portions 73D and 73D are bent in a direction in which they approach each other in the lateral direction. In the heat transfer sheet 70D, the fixed-side mounting portion 71D and the movable-side mounting portion 72D are mounted on the first heat transfer plate 80D and the second heat transfer plate 90D in a state where the fixed-side mounting portion 71D and the movable-side mounting portion 72D are inclined with respect to the vertical direction and the lateral direction, respectively. Therefore, the heat transfer sheet 70D is formed in a horizontal W shape as a whole.

The heat transfer sheet 70E according to the fifth modification includes the fixed-side mounting portion 71E, the movable-side mounting portion 72E, and the deformation portion 73E, and is mounted on the first heat transfer plate 80E and the second heat transfer plate 90E (refer to fig. 21). In the fifth modification, for example, a pair of heat transfer sheets 70E and 70E are provided. The first heat transfer plate 80E includes a mounting plate portion 80x facing the front-rear direction, a connecting portion 80z facing the up-down direction, and mounting plate portions 80y and 80y facing the lateral direction, and the second heat transfer plate 90E includes a mounting plate portion 90x facing the front-rear direction, a connecting portion 90z facing the up-down direction, and mounting plate portions 90y and 90y facing the lateral direction.

In the heat transfer sheet 70E, the fixed-side mounting portion 71E and the movable-side mounting portion 72E are mounted on the mounting plate portion 80y and the mounting plate portion 90y, respectively, and the deformation portion 73E is bent at the middle thereof and formed in a horizontally-lying V-shape. In the heat transfer sheets 70E and 70E, the middle portions of the deformation portions 73E and 73E are bent in a direction in which they approach each other in the lateral direction. In the heat transfer sheet 70E, the fixed-side mounting portion 71E and the movable-side mounting portion 72E are mounted on the first heat transfer plate 80E and the second heat transfer plate 90E, respectively, with the fixed-side mounting portion 71C and the movable-side mounting portion 72C facing in the lateral direction.

The heat transfer sheet 70F according to the sixth modification includes the fixed-side mounting portion 71F, the movable-side mounting portion 72F, and the deformation portion 73F, and is mounted on the first heat transfer plate 80F and the second heat transfer plate 90F (refer to fig. 22). In the sixth modification, for example, a pair of heat transfer sheets 70F and 70F are provided. The first heat transfer plate 80F includes a mounting plate portion 80x facing the front-rear direction and a mounting plate portion 80y facing the up-down direction, and the second heat transfer plate 90F includes a mounting plate portion 90x facing the front-rear direction and a mounting plate portion 90y facing the up-down direction.

In the heat transfer sheets 70F and 70F, the fixed-side mounting portions 71F and 71F are overlapped with the movable-side mounting portions 72F and 72F in the thickness direction, the fixed-side mounting portions 71F and the movable-side mounting portions 72F and 72F are mounted on the mounting plate portion 80y and the mounting plate portion 90y in an overlapped state, and the deformation portions 73F and 73F are bent at the middle portions thereof and formed in a lying V-shape. In the heat transfer sheets 70F and 70F, the middle portions of the deformation portions 73F and 73F are bent in a direction away from each other in the lateral direction. In the heat transfer sheet 70F, the fixed-side mounting portion 71F and the movable-side mounting portion 72F are mounted on the first heat transfer plate 80F and the second heat transfer plate 90F in a state in which the fixed-side mounting portion 71A and the movable-side mounting portion 72F face in the vertical direction. The deformed portions 73F and 73F of the heat transfer sheets 70F and 70F are formed in a parallelogram as a whole.

The heat transfer sheet 70G according to the seventh modification includes the fixed-side mounting portion 71G, the movable-side mounting portion 72G, and the deformation portion 73G, and is mounted on the first heat transfer plate 80G and the second heat transfer plate 90G (refer to fig. 23). In the seventh modification, for example, two sets of pairs of heat transfer sheets 70G and 70G are provided. The first heat transfer plate 80G includes a mounting plate portion 80x facing the front-rear direction, a connecting portion 80z facing the up-down direction, and mounting plate portions 80y and 80y facing the lateral direction, and the second heat transfer plate 90G includes a mounting plate portion 90x facing the front-rear direction, a connecting portion 90z facing the up-down direction, and mounting plate portions 90y and 90y facing the lateral direction.

In the heat transfer sheets 70G and 70G, the fixed-side mounting portions 71G and 71G are overlapped with the movable-side mounting portions 72G and 72G in the thickness direction, the fixed-side mounting portions 71G and the movable-side mounting portions 72G and 72G are mounted on the mounting plate portion 80y and the mounting plate portion 90y in an overlapped state, and the deformation portions 73G and 73G are bent at the middle portions thereof and formed in a lying V-shape. In one set of the heat transfer sheets 70G and 70G, the middle portions of the deformed portions 73G and 73G are bent in a direction in which they are apart from each other in the lateral direction. In the heat transfer sheet 70G, the fixed-side mounting portion 71G and the movable-side mounting portion 72G are mounted on the first heat transfer plate 80G and the second heat transfer plate 90G, respectively, with the fixed-side mounting portion 71C and the movable-side mounting portion 72C facing in the lateral direction. The deformed portions 73G and 73G of the heat transfer sheets 70G and 70G are formed in a diamond shape as a whole.

< conclusion >

As described above, a bendable heat transfer sheet (including the first heat transfer sheet 39, the second heat transfer sheet 46, and the heat transfer sheet 70, which is also applicable hereinafter) having portions mounted on the fixed body 7 and the movable body 8 and transferring heat generated in the movable body 8 to the fixed body 7 and having a thickness direction orthogonal to the optical axis direction is included in the imaging apparatus 1 and the image blur correction device 6.

Therefore, when the movable body 8 has moved relative to the fixed body 7 in the direction orthogonal to the optical axis direction, no torsion occurs in the heat transfer sheet, and therefore the load applied to the movable body 8 when the movable body 8 moves relative to the fixed body 7 can be suppressed after ensuring good heat transfer state from the movable body 8 to the fixed body 7, thereby promoting a reduction in power consumption.

Further, the fixed-side mounting portions 43, 50, and 71 mounted on the fixed body 7, the movable-side mounting portions 44, 51, and 72 mounted on the movable body 8, and the deformed portions 45, 52, 73 located between the fixed-side mounting portions 43, 50, 71 and the movable-side mounting portions 44, 51, 72 are provided on the heat transfer sheet, and the deformed portions 45, 52, 73 are formed in a curved shape.

Therefore, since the deformation portions 45, 52, 73 are easily deformed in accordance with the movement of the movable body 8 with respect to the fixed body 7, the load of the movement of the heat transfer sheet with respect to the movable body 8 is further reduced, and thus the further reduction in power consumption is promoted.

Further, by using a graphite sheet as the heat transfer sheet, it is possible to promote improvement in heat transfer efficiency from the movable body 8 to the fixed body 7, reduce the load applied from the heat transfer sheet to the movable body 8, and improve the strength of the heat transfer sheet, because graphite is a material having high heat resistance, light weight, and high tensile strength.

< embodiment of image Forming apparatus >

Fig. 24 is a block diagram of a still camera of an embodiment of an imaging device according to the present technology.

An imaging apparatus (still camera) 100 (corresponding to the imaging apparatus 1) includes a lens unit 101 having an imaging function, a camera signal processing unit 102 that performs signal processing such as analog-to-digital conversion of a captured image signal, and an image processing unit 103 that performs recording/reproduction processing of the image signal.

Further, the imaging apparatus 1 includes an image display unit 104 such as a liquid crystal panel that displays a captured image or the like, a reader/writer (R/W)105 that performs writing to and reading of an image signal from the memory 1000, a Central Processing Unit (CPU)106 that controls the entire imaging apparatus 1, an input unit 107 (corresponding to the operation section 4) made up of various switches or the like through which a user performs necessary operations, and a lens drive control unit 108 that controls driving of lenses arranged in the lens unit 101.

The lens unit 101 is composed of an optical system including a lens group 109 (corresponding to the lens 64), an imaging element 110 (corresponding to the imaging element 23), the imaging element 110 being such as a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) or the like.

The camera signal processing unit 102 performs various types of signal processing, such as conversion of an output signal from the imaging element 110 into an analog signal, noise removal, image quality correction, and conversion into luminance and color difference signals.

The image processing unit 103 performs compression encoding processing and decompression encoding processing, processing of converting a data specification such as resolution, and the like on an image signal based on a predetermined image data format.

The image display unit 104 has a function of displaying various types of data such as an operation state applied to the input unit 107 by a user and a captured image.

The R/W105 writes the image data encoded by the image processing unit 103 into the memory 1000 and reads the image data recorded in the memory 1000.

The CPU106 functions as a control processing unit that controls each circuit block provided in the image forming apparatus 1 and controls each circuit block based on an instruction input signal or the like from the input unit 107.

The input unit 107 is composed of a shutter release button for performing a shutter operation, a selection switch for selecting an operation mode, and the like, and outputs an instruction input signal to the CPU106 according to a user operation.

The lens driving control unit 108 controls a motor, not shown, and the like, which drives each lens of the lens group 109 based on a control signal from the CPU 106.

The memory 1000 is, for example, a semiconductor memory (memory card) detachably inserted into a slot connected to the R/W105 or an internal memory provided within the imaging apparatus 1.

Hereinafter, the operation in the image forming apparatus 1 will be described.

In the imaging standby state, an image signal captured in the lens unit 101 is output to the image display unit 104 through the camera signal processing unit 102, and is displayed as a camera still image under the control of the CPU 106. In addition, when an instruction input signal for zooming is input from the input unit 107, the CPU106 outputs a control signal to the lens driving control unit 108, and a predetermined lens of the lens group 109 is moved based on the control of the lens driving control unit 108.

When a shutter, not shown, in the lens unit 101 operates in accordance with an instruction input signal from the input unit 107, a captured image signal is output from the camera signal processing unit 102 to the image processing unit 103, and compression-encoded to be converted into digital data in a predetermined data format. The converted data is output to the R/W105 and written to the memory 1000.

Focusing or zooming is performed by the lens driving control unit 108 moving a predetermined lens of the lens group 109 according to a control signal from the CPU 106.

When the image data recorded in the memory 1000 is reproduced, the R/W105 reads predetermined image data from the memory 1000 according to an operation performed on the input unit 107, the image processing unit 103 performs decompression encoding processing on the read image data, and then outputs and displays the reproduced image signal to the image display unit 104 as a reproduced image.

Meanwhile, in the present technology, "imaging" refers to a process including only a part or all of a series of processes from a photoelectric conversion process of converting captured light into an electric signal by the imaging element 110 to processes such as a conversion of an output signal from the imaging element 110 into a digital signal, a noise removal, an image quality correction, and a conversion into luminance and color difference signals by the camera signal processing unit 102, an image signal compression encoding/decompression encoding process based on a predetermined image data format by the image processing unit 103, and a process of converting a data specification such as a resolution, and a process of writing an image signal into the memory 1000 by the R/W105.

That is, "imaging" may refer to photoelectric conversion processing of converting captured light into an electric signal only by the imaging element 110, to processing such as converting an output signal from the imaging element 110 into a digital signal, noise removal, image quality correction, and conversion into luminance and color difference signals by the camera signal processing unit 102, to photoelectric conversion processing of converting captured light into an electric signal by the imaging element 110, to processing such as performing compression encoding/decompression encoding processing of an image signal based on a predetermined image data format and converting data specifications such as resolution by the image processing unit 103 by converting an output signal from the imaging element 110 into a digital signal, performing noise removal, image quality correction, and conversion into luminance and color difference signals by the camera signal processing unit 102, refers to photoelectric conversion processing for converting captured light into an electrical signal by the imaging element 110 to processing such as converting an output signal from the imaging element 110 into a digital signal, noise removal, image quality correction, and conversion into luminance and color difference signals by the camera signal processing unit 102, image signal compression encoding/decompression encoding processing based on a predetermined image data format, and conversion into a data specification such as resolution by the image processing unit 103, or processing for writing an image signal into the memory 1000 by the R/W105. In the above-described processing, the processing order may be changed as appropriate.

In addition, in the present technology, the imaging apparatus 100 may be configured to include only a part or all of the imaging element 110, the camera signal processing unit 102, the image processing unit 103, and the R/W105 that perform the aforementioned processing.

< present technology >

The present technology can be configured as follows.

(1) An image blur correction device comprising:

a fixed body fixed within the housing;

a movable body that includes an imaging element and moves relative to the fixed body in a direction orthogonal to an optical axis direction; and

and a bendable heat transfer sheet having portions attached to the fixed body and the movable body and transferring heat generated in the movable body to the fixed body, wherein a thickness direction of the heat transfer sheet is orthogonal to the optical axis direction.

(2) The image blur correction device according to (1), wherein a fixed-side mounting portion mounted on the fixed body, a movable-side mounting portion mounted on the movable body, and a deformation portion between the fixed-side mounting portion and the movable-side mounting portion, which is formed in a curved shape, are provided in the heat transfer sheet.

(3) The image blur correction device according to (2), wherein the heat transfer sheet is formed by superimposing a plurality of sheet-like members in the thickness direction.

(4) The image blur correction device according to (3), wherein

The fixed-side mounting part and the movable-side mounting part are positioned opposite to each other, and

both ends of the deformation portion are connected to one end of the fixed-side mounting portion and one end of the movable-side mounting portion, respectively, and include a first portion connected to the fixed-side mounting portion and a second portion connected to the movable-side mounting portion, wherein

The first portion is bent at an acute angle with respect to the fixed-side mounting portion, and

the second portion is bent at an acute angle with respect to the movable-side mounting portion.

(5) The image blur correction device according to (4), wherein

The heat transfer sheet is formed in a ring shape,

the deformation parts are arranged in pairs, and the deformation parts are arranged in pairs,

both ends of one of the deformation portions are connected to one end of the fixed-side mounting portion and one end of the movable-side mounting portion, respectively, and

both ends of the other of the deformed portions are connected to the other end of the fixed-side mounting portion and the other end of the movable-side mounting portion, respectively.

(6) The image blur correction device according to (4) or (5), wherein

The heat transfer sheet is provided with at least two, and

at least one of the heat transfer sheets and at least another one of the heat transfer sheets are disposed in a direction orthogonal to the optical axis direction.

(7) The image blur correction device according to any one of (4) to (6), wherein

A flexible printed wiring board is connected to the movable body,

the flexible printed wiring board is bent in the optical axis direction such that respective portions of the flexible printed wiring board are opposed to each other, and

the fixed-side mounting portion and the movable-side mounting portion are positioned to face each other in a direction orthogonal to both the optical axis direction and the width direction of the flexible printed wiring board.

(8) The image blur correction device according to any one of (1) to (7), wherein

At least two heat transfer sheets are provided on the back surface side of the image forming element, and

the two heat transfer sheets are disposed on opposite sides of a center of the imaging element on a diagonal line of the imaging element.

(9) The image blur correction device according to any one of (1) to (8), wherein

A fixed side heat transfer plate is arranged in the fixed body,

a movable-side heat transfer plate is provided in the movable body, and

each part of the heat transfer sheet is attached to the fixed-side heat transfer plate and the movable-side heat transfer plate.

(10) The image blur correction device according to any one of (1) to (9), wherein a graphite sheet is used as the heat transfer sheet.

(11) An image forming apparatus includes

An image blur correction device that corrects an image blur in such a manner that a movable body including an imaging element is moved relative to a fixed body fixed within a housing in a direction orthogonal to an optical axis direction, wherein the image blur correction device includes a bendable heat transfer sheet that has portions mounted on the fixed body and the movable body and transfers heat generated in the movable body to the fixed body, wherein a thickness direction of the heat transfer sheet is orthogonal to the optical axis direction.

List of reference numerals

1 image forming apparatus

6 image blur correction device

7 fixed body

8 Movable body

12 first fixed side heat transfer plate

13 second fixed side heat transfer plate

19 first movable side heat transfer plate

20 second movable side heat transfer plate

23 imaging element

33 first flexible printed wiring board

37 second flexible printed wiring board

38 third flexible printed wiring board

39 first heat transfer sheet

40 sheet-like member

43 fixed side mounting part

44 movable side mounting part

45 deformation part

45a first part

45b second part

46 second heat transfer sheet

47 sheet-like member

50 fixed side mounting part

51 movable side mounting part

52 deformation part

52a first part

52b second part

70 heat transfer sheet

71 fixed side mounting part

72 movable side mounting part

73 deformation part

80 first heat transfer plate

90 second heat transfer plate

70A-70G heat transfer sheet

71A to 71G fixed side mounting part

72A to 72G movable side mounting part

73A-73G deformation

80A-80G first heat transfer plate

90A to 90G second heat transfer plate

100 image forming apparatus

110 imaging element