阅读说明：本技术 透镜驱动装置 (Lens driving device ) 是由 铃木辉 一桥秀辅 于 2019-07-11 设计创作，主要内容包括：本发明提供能够防止产生颗粒或侵入到光路上的透镜驱动装置。一种透镜驱动装置,具有：可动体,其具有保持透镜的透镜保持器和磁体；固定体,其具有线圈基板和具有基底配线部的基底基板,上述线圈基板具有与上述磁体相对且沿上述透镜的光轴正交方向驱动上述磁体的线圈及与上述线圈连接的线圈配线部,上述基底基板相对于上述线圈基板配置于与上述磁体相对的一侧的相反侧且形成有使上述透镜的光轴通过的开口部；支承部,其将上述可动体可相对移动地连接于上述固定体,且使上述可动体支承于上述固定体,在上述固定体上,可导电地连接上述线圈配线部和上述基底配线部的第一导电部从上述开口部的开口缘向径向外侧分开地设置。(The invention provides a lens driving device capable of preventing generation of particles or invasion onto an optical path. A lens driving device has: a movable body having a lens holder holding a lens and a magnet; a fixed body having a coil substrate and a base substrate having a base wiring portion, the coil substrate having a coil facing the magnet and driving the magnet in a direction orthogonal to an optical axis of the lens and a coil wiring portion connected to the coil, the base substrate being disposed opposite to the coil substrate on a side facing the magnet and having an opening formed therein for passing the optical axis of the lens; and a support portion that connects the movable body to the fixed body so as to be relatively movable, and supports the movable body to the fixed body, wherein the first conductive portion that electrically conductively connects the coil wiring portion and the base wiring portion is provided on the fixed body so as to be spaced radially outward from an opening edge of the opening portion.)

1. A lens driving device is characterized in that,

comprising:

a movable body having a lens holder holding a lens and a magnet;

a fixed body having a coil substrate and a base substrate, wherein the coil substrate has a coil facing the magnet and driving the magnet in a direction orthogonal to the optical axis of the lens, and a coil wiring portion connected to the coil, and the base substrate is disposed opposite to the coil substrate on a side facing the magnet and has an opening formed therein for passing the optical axis of the lens therethrough, and has a base wiring portion; and

a support portion that connects the movable body to the fixed body so as to be movable relative to the fixed body and supports the movable body to the fixed body,

in the fixed body, a first conductive portion that conductively connects the coil wiring portion and the base wiring portion is provided separately from an opening edge of the opening portion to a radially outer side.

2. The lens driving device according to claim 1,

the first conductive portion and the opening edge are separated by a resin portion.

3. The lens driving device according to claim 1 or 2,

the resin portion connecting the coil substrate and the base substrate surrounds and covers the periphery of the first conductive portion when viewed from the optical axis direction of the lens.

4. The lens driving device according to claim 2,

the resin portion is provided intermittently in a plurality around the opening.

5. The lens driving device according to claim 2,

the resin portion is continuously provided so as to surround the periphery of the opening.

6. The lens driving device according to claim 2,

the resin portion is provided to be spaced radially outward from the opening edge of the opening portion.

7. The lens driving device according to claim 2,

at least a part of the resin portion contains metal particles unevenly present in the resin.

8. The lens driving device according to claim 1 or 2,

the base substrate includes a metal plate portion in which the opening is formed, and the base wiring portion is provided on the coil substrate side in the plate portion.

9. The lens driving device according to claim 1 or 2,

a spacer for defining a gap between the coil substrate and the base substrate is provided between the coil substrate and the base substrate.

Technical Field

The present invention relates to a camera shake correction lens driving device suitable for use in, for example, a camera module of a mobile phone.

Background

A camera-shake correction lens driving device has been developed which performs optical camera-shake correction (OIS) by moving a lens holder holding a lens in a direction perpendicular to an optical axis in a lens driving device applied to a camera module of a mobile phone or the like (for example, patent document 1 below). In such a lens driving device, power is supplied to a driving coil for driving the lens via a wiring portion of the FPC or the rigid substrate, a spring, or the like.

Further, conductive bonding members such as solder are used for connecting wiring portions of the substrates to each other or connecting portions between the wiring portions of the substrates and springs. The bonding member such as solder is melted and solidified by heating or the like to bond the wiring portion and the like. However, in the conventional lens driving device, particles are generated from the joint member, and may be attached to the optical path in the lens driving device or may be mixed into the imaging element, which is problematic. Further, in the lens driving device for camera shake correction, since there is a tendency that the number of coils and movable members increases, it is necessary to effectively suppress the generation of particles accompanying an external impact or the like.

Disclosure of Invention

The present invention has been made in view of such circumstances, and an object thereof is to provide a lens driving device capable of preventing particles from flowing into an optical path.

In order to achieve the above object, a lens driving device according to the present invention includes:

a movable body having a lens holder holding a lens and a magnet;

a fixed body having a coil substrate and a base substrate, wherein the coil substrate has a coil facing the magnet and driving the magnet in a direction orthogonal to the optical axis of the lens, and a coil wiring portion connected to the coil, and the base substrate is disposed opposite to the coil substrate on a side facing the magnet and has an opening formed therein for passing the optical axis of the lens therethrough, and has a base wiring portion;

a support portion that connects the movable body to the fixed body so as to be movable relative to the fixed body and supports the movable body to the fixed body,

in the fixing body, a first conductive portion that conductively connects the coil wiring portion and the base wiring portion is provided so as to be spaced radially outward from an opening edge of the opening portion.

In the lens driving device according to the present invention, the first conductive portion connecting the coil wiring portion and the base wiring portion is provided so as to be spaced radially outward from the opening edge of the opening portion. Therefore, the first conductive portion can be prevented from colliding with another member such as the lens holder, and particles can be prevented from being generated from the first conductive portion. Further, since the first conductive portion is not exposed to the opening edge, it is possible to prevent a problem that particles generated from the first conductive portion intrude into the optical path. Further, the first conductive portion is not exposed to the opening portion, and therefore, is advantageous from the viewpoint of bonding reliability, compared to the conventional technique in which a conductive portion exposed to the opening portion side is provided.

For example, the first conductive portion and the opening edge may be separated by a resin portion.

In addition, the first conductive portion is not only separated from the opening edge alone, but also the first conductive portion and the opening edge are separated by the resin portion, so that particles generated from the first conductive portion and the particles can be effectively prevented from entering the optical path.

Further, for example, when viewed from the optical axis direction of the lens, the resin portion connecting the coil substrate and the base substrate may surround and cover the periphery of the first conductive portion.

Since the resin portion covers the periphery of the first conductive portion, generation of particles from the first conductive portion and intrusion of the particles into the optical path can be more effectively prevented. Further, it is possible to prevent the conductive particles, moisture, or the like from adhering to the first conductive portion, which causes a problem in insulation.

In the lens driving device according to the present invention, for example, the resin portion may be provided intermittently in plural numbers around the opening.

For example, in the lens driving device according to the present invention, the resin portion may be continuously provided so as to surround the periphery of the opening.

Since the resin portion is provided intermittently in a plurality around the opening or the resin portion is disposed so as to surround the opening, the particles can be effectively prevented from entering the opening. In addition, even when the base substrate and the coil substrate are connected to each other by the resin portion, it is expected that the bonding strength between the base substrate and the coil substrate is improved.

For example, at least a part of the resin portion may include metal particles unevenly present in the resin.

In the case where the first conductive portion is covered with the resin portion, there is a risk that heat dissipation efficiency is reduced as compared with the case where the first conductive portion is exposed, but since the resin contains the metal particles, the first conductive portion has good heat dissipation even if covered with the resin portion. Further, it is preferable that the metal particles are unevenly present in the resin within a limit of ensuring the insulation property of the resin.

For example, the base substrate may include a metal plate portion having the opening formed therein, and the base wiring portion may be provided on the coil substrate side of the plate portion.

Such a base substrate can be thinned while ensuring strength, and therefore contributes to miniaturization of the entire lens driving device. Further, a metal plate portion is also advantageous from the viewpoint of improving heat dissipation of the lens driving device.

For example, a spacer may be provided between the coil substrate and the base substrate to define a gap between the coil substrate and the base substrate.

The lens driving device with the spacer can restrain the manufacturing deviation of the interval between the coil substrate and the base substrate, and can properly prevent the problem that the shape of the first conductive part or the shape of the resin part connecting the coil substrate and the base substrate is deviated due to the non-uniform gap between the coil substrate and the base substrate.

Drawings

Fig. 1 is an external view of a lens driving device according to an embodiment of the present invention.

Fig. 2 is a perspective view of the lens driving device shown in fig. 1 with a cover removed.

Fig. 3 is a sectional view of the lens driving apparatus shown in fig. 1.

Fig. 4 is a perspective view showing a coil substrate, a base substrate, and peripheral components included in the lens driving device shown in fig. 1.

Fig. 5 is a perspective view showing a base substrate and peripheral components included in the lens driving device shown in fig. 1.

Fig. 6 is a plan view showing a base substrate and peripheral components included in the lens driving device shown in fig. 1.

Fig. 7 is a partially enlarged view of the base substrate and its peripheral parts shown in fig. 6.

Fig. 8(a) is an enlarged cross-sectional view showing the periphery of the first conductive part included in the lens driving device shown in fig. 1, fig. 8(b) is a schematic view of the second resin part shown in fig. 8(a), and fig. 8(c) is a schematic view of the first resin part shown in fig. 8 (a).

Fig. 9 is a partial perspective view showing the base substrate before the first conductive portion is formed.

Fig. 10 is a partial perspective view showing the coil substrate before the first conductive portion is formed.

Fig. 11 is a plan view showing a base substrate and peripheral components thereof according to a first modification.

Fig. 12 is a plan view showing a base substrate and peripheral components thereof according to a second modification.

Description of the symbols

2 … lens driving device

3 … movable body

4 … fixed body

8 … casing

16 … suspension wire

18 … position sensor

20 … base substrate

21 … base wiring part

22 … base opening part

22a … opening edge

23 … connector part

24 … board part

25 … base insulation

30 … coil substrate

31 … coil wiring part

32 … hand shake correction coil

34 … coil substrate opening

35 … coil substrate insulating part

40 … lens holder

46 … focusing coil

50 … rear spring

60 … frame

71 … first conductive part

72 … resin part

74 … first resin part

74a … Metal particles

76 … second resin part

76a … spacer

80 … magnet

90 … front spring

100 … lens

O … optical axis.

Detailed Description

The present invention will be described below with reference to embodiments shown in the drawings.

As shown in fig. 1, a lens driving device 2 according to an embodiment of the present invention holds a lens 100 at the center of the lens driving device 2, and drives the lens 100. The lens driving device 2 has a substantially rectangular outer shape when viewed from the optical axis O direction of the lens 100. The lens driving device 2 has a housing 8 covering the inside from the incident side in the optical axis direction, i.e., the positive Z-axis direction. The housing 8 is formed with a through hole through which the optical axis O of the lens 100 passes.

Fig. 2 is a perspective view showing a state in which the housing 8 is removed from the lens driving device 2 shown in fig. 1. The lens driving device 2 includes: a movable body 3 that moves in the direction orthogonal to the optical axis together with the lens 100 held by the lens holder 40 during camera shake correction; a fixed body 4 that is relatively displaced with respect to movable body 3; the movable body 3 is connected to the fixed body 4 so as to be movable relative thereto, and serves as a suspension wire 16 for supporting the movable body 3 on the support portion of the fixed body 4.

Fig. 3 is a sectional view of the lens driving device 2 shown in fig. 1. However, in fig. 3, the lens 100 is not shown for the sake of easy viewing of other components. As shown in fig. 3, movable body 3 is disposed inside housing 8 shown in fig. 1, and includes lens holder 40 holding lens 100 and magnet 80. The movable body 3 includes a front spring 90, a rear spring 50, a frame 60, a focusing coil 46, and the like, in addition to the lens holder 40 and the magnet 80.

As shown in fig. 4, the fixed body 4 includes a coil substrate 30 and a base substrate 20, the coil substrate 30 includes a coil 32 for correcting camera shake for driving the magnet 80 of the movable body 3 in the direction orthogonal to the optical axis of the lens 100 (see fig. 4), and the base substrate 20 includes a base wiring portion 21 (see fig. 6) electrically connected to the coil wiring portion 31 of the coil substrate 30 and the like. The connector portion 23, which is a part of the base substrate 20, is exposed from the housing 8 in the Z-axis negative direction, which is the outgoing side in the optical axis direction.

The lens driving device 2 is used in combination with an image sensor such as a solid-state imaging element, not shown. The image sensor is disposed behind the lens holder 40 (on the negative Z-axis side), and photoelectrically converts light emitted from the lens 100 held by the lens driving device 2 to generate an image. The method of disposing the image sensor is not particularly limited, and the image sensor may be directly fixed to the fixing body 4 of the lens driving device 2, or may be connected to the lens driving device 2 via another member.

In the description of the lens driving device 2, the direction parallel to the optical axis of the lens 100 shown in fig. 1 is referred to as the Z-axis, and the direction perpendicular to the optical axis is referred to as the X-axis direction and the Y-axis direction.

As shown in fig. 2 and 3, the movable body 3 of the lens driving device 2 is supported by the fixed body 4 via four suspension wires 16 extending in the optical axis direction. As shown in fig. 2, suspension wires 16 are arranged at four corners of the substantially rectangular lens driving device 2, and connect the four corners of the movable body 3 and the fixed body 4 to each other. The suspension wires 16 are made of a material having elasticity such as metal, and at least two of the suspension wires 16 also serve as power supply paths to the focusing coil 46 fixed to the lens holder 40.

The support portion for connecting movable body 3 to fixed body 4 so as to be movable relative thereto is not limited to suspension wire 16 shown in fig. 2, and may be another mechanism such as a ball or a slide mechanism for supporting movable body 3 so as to be movable relative thereto in the direction orthogonal to the optical axis.

As shown in fig. 2, the end of the suspension wire 16 in the positive Z-axis direction is fixed to the outer portion of the front spring 90. The front spring 90 has an outer portion fixed to the frame 60, an inner portion fixed to the lens holder 40, and an arm portion connecting the outer portion and the inner portion. The front spring 90 is divided into a plurality of parts, and serves as a power supply path to the focusing coil 46, similarly to a part of the suspension wire 16.

As shown in fig. 3, movable body 3 includes: the lens holder 40 includes a frame 60, a magnet 80 fixed to the frame 60, a lens holder 40 held so as to be movable relative to the frame 60 and the magnet 80 in the optical axis direction, and a focusing coil 46 fixed to the lens holder 40. The lens holder 40 and the frame 60 are connected by two springs, a front spring 90 attached to the positive Z-axis direction side and a rear spring 50 attached to the negative Z-axis direction side. The rear spring 50 also has an inner portion fixed to the lens holder 40 and an arm portion connecting the outer portion and the inner portion, similarly to the front spring 90.

As shown in fig. 2 and 3, the lens holder 40 has a hollow cylindrical shape, and the lens 100 is fixed to the inner peripheral surface of the lens holder 40. As shown in fig. 3, an annular focusing coil 46 surrounding the outer peripheral surface of the lens holder 40 is fixed to the outer peripheral surface of the lens holder 40. The focusing coil 46 faces the inner surface of the magnet 80.

As shown in fig. 2, the frame 60 to which the outer portion of the front spring 90 is fixed has a substantially rectangular frame shape. Magnets 80 are fixed to each side of the frame 60, and the lens driving device 2 has four magnets 80. The magnet 80 has a substantially rectangular parallelepiped outer shape and is disposed so as to surround the lens holder 40.

As shown in fig. 3, the magnet 80 and the focusing coil 46 facing the magnet 80 at a predetermined interval in the direction orthogonal to the optical axis constitute a voice coil motor for driving the lens 100 held by the lens holder 40 in the optical axis direction.

Fig. 4 is a perspective view showing the coil substrate 30, the base substrate 20, and peripheral components included in the lens driving device 2. As shown in fig. 4, the coil substrate 30 has a coil substrate opening 34 formed in the center thereof to allow the optical axis O to pass therethrough, and has a substantially rectangular flat plate-like outer shape perpendicular to the optical axis O. The ends of the suspension wires 16 on the Z-axis negative direction side are fixed to the four corners of the coil substrate 30.

The coil substrate 30 has a shake correction coil 32 as a shake correction driving coil. As shown in fig. 4, the coil substrate 30 includes four coils 32 for correcting camera shake, and each of the coils 32 for correcting camera shake is disposed along four sides of the coil substrate 30 so as to surround the coil substrate opening 34.

As shown in fig. 3, the shake correction coil 32 faces the magnet 80 of the movable body 3 at a predetermined interval in the optical axis direction, and the shake correction coil 32 drives the magnet 80 in the direction perpendicular to the optical axis of the lens 100. Therefore, the hand shake correction coil 32 and the magnet 80 constitute a voice coil motor that drives the lens 100 held by the lens holder 40 in the direction orthogonal to the optical axis.

The coil substrate 30 has a coil wiring portion 31 connected to the camera shake correction coil 32, and as shown in fig. 10, a part of the coil wiring portion 31 is exposed on the surface of the coil substrate 30 on the Z-axis negative direction side, and a first conductive portion 71 described below is connected to the exposed portion. The shake correction coil 32 and the coil wiring portion 31 are made of a good metal conductor, and as shown in fig. 4, the surfaces of the shake correction coil 32 and the coil wiring portion 31 are covered with a coil substrate insulating portion 35 (see fig. 10) which is an insulator, except for a portion of the coil wiring portion 31 to which the first conductive portion 71 is connected.

As shown in fig. 4, the coil substrate 30 is formed with a through hole through which the position sensor 18 for detecting the position of the magnet 80 is inserted, and the position sensor 18 fixed to the base substrate 20 faces the magnet 80 via the through hole. The coil wiring portion 31 of the coil substrate 30 includes a member electrically connected to the suspension wire 16 in addition to the member connected to the camera-shake correction coil 32. Similarly to the coil wiring portion 31 connected to the camera shake correction coil 32, a part of the coil wiring portion 31 connected to the suspension wire 16 is exposed on the surface of the coil substrate 30 on the Z-axis negative direction side, and the first conductive portion 71 is connected to the exposed part.

As shown in fig. 3 and 4, the base substrate 20 is disposed on the side of the coil substrate 30 opposite to the positive Z-axis direction, i.e., the side of the coil substrate 30 facing the magnet 80, i.e., the negative Z-axis direction side. As shown in fig. 5, which is a perspective view of the base substrate 20, the base substrate 20 has a base opening 22 formed in a central portion thereof as an opening through which the optical axis O passes, a coil substrate opposing portion 20a having an outer shape of a substantially rectangular flat plate orthogonal to the optical axis O, and a pair of connector portions 23 connected to both sides of the coil substrate opposing portion 20a in the Y axis direction.

As shown in fig. 3 and 4, the base opening 22 of the base substrate 20 is disposed so as to be substantially aligned with the coil substrate opening 34 of the coil substrate 30 when viewed from the Z-axis direction. In addition, as shown in fig. 5, the pair of connector portions 23 are bendable with respect to the coil substrate opposing portion 20 a. The connector portion 23 is connected to an external board or the like that transmits power, a control signal, or the like for driving the lens driving device 2 to the lens driving device 2.

Fig. 6 is a plan view showing the base substrate 20 and its peripheral components. As shown in fig. 5 and 6, the base substrate 20 has a plurality of base wiring portions 21. The base wiring portion 21 is made of a good conductor of metal, and a conductive path is formed on the coil base opposing portion 20a, the conductive path continuing from one end portion connected to the first conductive portion 71 to the other end portion exposed at the connector portion 23.

As shown in fig. 9, a part of the base wiring portion 21 is exposed on the surface of the coil substrate opposing portion 20a in the positive Z-axis direction of the base substrate 20, and the first conductive portion 71 (see fig. 6) is connected to the exposed portion. In fig. 5, 6, 7, and 9, the base wiring portion 21 is displayed so as to be transparent to the base insulating portion 25 (see fig. 8 a) which is an insulator, so that the arrangement of the base wiring portion 21 under the insulator can be recognized, but actually, the base wiring portion 21 is covered with the base insulating portion 25 except for one end portion connected to the first conductive portion 71 and the other end portion exposed at the connector portion 23.

As shown in fig. 5 and 6, a first conductive portion 71 and a resin portion 72 are provided on the Z-axis positive direction side surface of the coil substrate opposing portion 20a of the base substrate 20. As shown in fig. 8(a), which is a cross-sectional view of the fixed body 4 around the first conductive portion 71, the first conductive portion 71 conductively connects the coil wiring portion 31 disposed on the positive Z-axis side with respect to the first conductive portion 71 and the base wiring portion 21 disposed on the negative Z-axis side with respect to the first conductive portion 71.

As shown in fig. 8(a), the first conductive portion 71 is made of a conductive material such as solder or a conductive adhesive, but the material of the first conductive portion 71 is not particularly limited if it is a material that allows the coil wiring portion 31 and the base wiring portion 21 to be electrically connected. As shown in fig. 8(a), the base substrate 20 includes a metal plate portion 24 in which the base opening 22 shown in fig. 6 is formed. As shown in fig. 8(a), the base wiring portion 21 is provided on the coil substrate 30 side of the plate portion 24 via the base insulating portion 25, and is insulated from the conductive plate portion 24 by the base insulating portion 25.

As shown in fig. 7, which is a partially enlarged view of fig. 6, the first conductive portion 71 is provided apart from the opening edge 22a of the base opening 22 to the outside in the radial direction of the base opening 22, and is not exposed to the base opening 22. First conductive portion 71 and opening edge 22a are separated by first resin portion 74. In addition, in the fixed body 4, only a part of the first conductive portion 71 may be separated from the opening edge 22a of the base opening 22, but as shown in fig. 6, from the viewpoint of more effectively preventing particles from flowing into the base opening 22, it is preferable that the entire first conductive portion 71 be separated from the opening edge 22a of the base opening 22.

As shown in fig. 6, resin portion 72 includes first resin portion 74 surrounding and covering the periphery of first conductive portion 71 when viewed in the optical axis direction, and second resin portion 76 provided separately from first conductive portion 71. A plurality of resin portions 72 having first resin portion 74 and second resin portion 76 are provided intermittently around base opening 22.

As shown in fig. 8(a), the first resin portion 74 connects the coil substrate 30 and the base substrate 20 in the Z-axis direction. A part of the first resin portion 74 enters a step portion between the exposed surface of the coil wiring portion 31 and the surface of the insulator of the coil substrate 30, and another part of the first resin portion 74 enters a step portion between the exposed surface of the base wiring portion 21 and the surface of the base insulating portion 25.

As shown in fig. 8(a), the exposed surfaces of the coil wiring portion 31 and the base wiring portion 21 connected to the first conductive portion 71 and the first conductive portion 71 are covered with the first resin portion 74 and the insulators of the substrates 20 and 30, and are not exposed. In this way, by covering and protecting first conductive portion 71 and the like with first resin portion 74, it is possible to prevent generation of particles from the connection portion using first conductive portion 71, and to prevent adhesion of dust and moisture to the conductive portion.

The first resin portion 74 is insulating as a whole, is mainly made of resin, and includes metal particles 74a unevenly present in the resin as shown in fig. 8 (c). The first resin portion 74 including the metal particles 74a has good heat dissipation characteristics. The metal particles 74a included in the first resin portion 74 are not particularly limited, and for example, the same conductive material as that included in the first conductive portion 71 can be used.

As shown in fig. 6, the second resin portion 76 is formed in an arc shape along the opening edge 22 a. As shown in fig. 8(a), the second resin portion 76 connects the insulator surface of the coil substrate 30 and the surface of the base insulating portion 25. The second resin portion 76 is made of resin or the like after curing the adhesive, but may not include the metal particles 74a as in the first resin portion 74.

As shown in fig. 8(b), a spacer 76a defining a gap between the coil substrate 30 and the base substrate 20 is provided inside the second resin portion 76. By sandwiching the spacer 76a between the coil substrate 30 and the base substrate 20, the gap between the coil substrate 30 and the base substrate 20 can be prevented from becoming narrower than the particle diameter of the spacer 76 a. The spacers 76a can be disposed between the coil substrate 30 and the base substrate 20 by being dispersed in an adhesive, which is a material of the second resin portion 76, for example. The particle diameter of the spacer 76a is not particularly limited, and may be set to be larger than the particle diameter of the metal particles 74a included in the first resin portion 74, for example.

As shown in fig. 7, the first resin portion 74 and the second resin portion 76 are provided to be spaced radially outward from the opening edge 22a and are not exposed to the base opening 22. The first resin portion 74 and the second resin portion 76 are more preferably disposed so as to avoid the opening edge 22a from the viewpoint of preventing the particles from flowing into the base opening 22. However, the resin portion 72 can be made to correspond to the base opening 22 by making a correspondence using a resin or the like that generates little particles as a material of the first resin portion 74 and the second resin portion 76.

As described above, in the lens driving device 10, as shown in fig. 8(a), the first conductive portion 71 connecting the coil wiring portion 31 and the base wiring portion 21 is provided so as to be spaced radially outward from the opening edge 22a of the base opening 22, as shown in fig. 7. Therefore, collision of the first conductive portion 71 with other members such as the lens holder 40 can be prevented, and generation of particles from the first conductive portion 71 can be prevented.

Further, since the first conductive portion 71 is not exposed to the opening edge 22a, a problem that particles generated from the first conductive portion 71 intrude into the optical path can be prevented. Further, the first conductive portions 71 are not exposed to the opening portion, and therefore are less likely to be subjected to impact or the like, and are advantageous from the viewpoint of bonding reliability as compared with the conventional technique in which conductive portions exposed to the opening portion side are provided. In the lens drive device 2, when the base substrate 20 has the metal plate portion 24, the first conductive portion 71 is separated from the opening edge 22a, or the resin portion 72 is disposed, whereby insulation between the first conductive portion 71 and the plate portion 24 can be appropriately secured.

The lens driving device 2 according to the present invention has been described above with reference to the embodiment, but the present invention is not limited to the above embodiment and includes many other embodiments and modifications. For example, in the above-described embodiment, the strength can be suitably ensured even if the thickness is small by forming the plate portion 24 of the base substrate 20 of metal, but the base substrate is not limited to a member having the plate portion 24 of metal, and may be a member having a plate portion of resin or another material.

The arrangement of the resin portion 72 is not limited to the configuration shown in fig. 6, and the first resin portion 74 and the second resin portion 76 may have a shape different from the shape shown in the first embodiment. Fig. 11 is a plan view showing the base substrate 20 and its peripheral components in the lens driving device provided with the resin portion 172 according to the first modification. In the resin portion 172 according to the first modification, the first resin portion 174 is formed in an arc shape along the opening edge 22a, similarly to the second resin portion 76.

First resin portion 174 connects a plurality of (two in the example shown in fig. 11) first conductive portions 71, and covers the periphery of the plurality of first conductive portions 71. Since the first resin portion 174 is formed to be wide around the first conductive portion 71, generation of particles from the first conductive portion 71 can be effectively prevented, and the first resin portion 174 can effectively protect the first conductive portion 71. In addition, the first resin portion 174 also has a good effect of reinforcing the connection between the coil substrate 30 and the base substrate 20. The lens driving device according to the first modification is the same as the lens driving device 2 according to the embodiment except that the shape of the first resin portion 174 is different, and the same effects are exhibited.

Fig. 12 is a plan view showing the base substrate 20 and its peripheral components in the lens driving device provided with the resin portion 272 according to the second modification. The resin portion 272 according to the second modification is provided continuously so as to surround the periphery of the base opening 22.

As shown in fig. 12, resin portion 272 includes first resin portion 274 and second resin portion 76, and first resin portion 274 is formed in an arc shape along opening edge 22a, similarly to second resin portion 76. First resin portion 274 connects a plurality of first conductive portions 71 and two adjacent second resin portions 76, similarly to first resin portion 174 shown in fig. 11. Therefore, resin portion 272 has a ring shape in which first resin portion 274 and second resin portion 76 are connected to each other.

Such a continuous annular resin portion 272 can effectively prevent particles from flowing into the base opening portion 22 from the outside. The lens driving device according to the second modification has the same effects as the lens driving device 2 according to the embodiment except that the shape of the first resin portion 274 is different. The annular resin portion 272 is not limited to the shape shown in fig. 12 in which the first resin portion 274 and the second resin portion 76 are connected, and may be a shape in which the first resin portion including the metal particles 74a (see fig. 8 c) is formed in an annular shape or a shape in which the second resin portion including the spacer 76a (fig. 8 b) is formed in an annular shape.