阅读说明：本技术 透镜驱动装置、照相机装置、电子设备及这些的制造方法 (Lens driving device, camera device, electronic apparatus, and methods of manufacturing the same ) 是由 矢野智义 鹫尾纪之 于 2018-07-10 设计创作，主要内容包括：本发明提供一种能够增大线圈的卷厚的透镜驱动装置、照相机装置、电子设备及这些的制造方法。本发明的透镜驱动装置(1)具备：用于固定透镜的透镜载体；以及用于驱动透镜载体的线圈组件(14),线圈组件(14)具有基板(143)、设于基板(143)上的安装部件(141)、和以包围安装部件(141)的周围的方式设于基板(143)上的线圈(142),安装部件(141)具有相邻的第1及第2角部(C1、C2)、和与第1角部(C1)对置的第3角部(C3),线圈(142)与第1至第3角部(C1～C3)相接。(The invention provides a lens driving device, a camera device, an electronic device and a manufacturing method thereof, wherein the thickness of a coil can be increased. A lens driving device (1) of the present invention is provided with: a lens carrier for holding a lens; and a coil unit (14) for driving the lens carrier, wherein the coil unit (14) comprises a substrate (143), a mounting member (141) provided on the substrate (143), and a coil (142) provided on the substrate (143) so as to surround the mounting member (141), the mounting member (141) comprises adjacent 1 st and 2 nd corner portions (C1, C2), and a 3 rd corner portion (C3) facing the 1 st corner portion (C1), and the coil (142) is in contact with the 1 st to 3 rd corner portions (C1-C3).)

1. A lens driving device is characterized by comprising:

a lens carrier for holding a lens; and

a coil assembly for driving the lens carrier,

the coil assembly includes a substrate, a mounting member provided on the substrate, and a coil provided on the substrate so as to surround the mounting member,

the mounting member has adjacent 1 st and 2 nd corner portions and a 3 rd corner portion opposed to the 1 st corner portion,

the coil is connected to the 1 st to 3 rd corner portions.

2. The lens driving apparatus as claimed in claim 1, wherein: the 1 st to 3 rd corner parts are right-angled triangles or acute triangles.

3. The lens driving device according to claim 1 or 2, wherein: the coil is in close contact with a 1 st side surface between the 1 st corner and the 2 nd corner of the mounting member and a 2 nd side surface including the 3 rd corner and facing the 1 st side surface.

4. The lens driving device according to claim 1 or 2, wherein: the winding start end of the coil is provided at a position overlapping the coil when viewed from the winding axis direction of the coil.

5. The lens driving apparatus as claimed in claim 1, wherein: the coil assembly has a resin molded body formed on the substrate so as to cover an outer periphery of the coil, the resin molded body being made of a resin material.

6. The lens driving apparatus as claimed in claim 5, wherein: the outer periphery of the coil coincides with the inner periphery of the resin molded body.

7. The lens driving device according to claim 5 or 6, wherein: the resin molded body is at least a part of the lens carrier.

8. The lens driving device according to claim 5 or 6, wherein: the resin molded body is at least a part of a frame body that accommodates the lens carrier.

9. The lens driving apparatus as claimed in claim 1, wherein: the substrate is a printed substrate or a flexible printed substrate.

10. A camera device including the lens driving device according to any one of claims 1 to 9.

11. An electronic device provided with the camera device according to claim 10.

12. A method for manufacturing a lens driving device, the lens driving device comprising:

a lens carrier for holding a lens; and

a coil assembly for driving the lens carrier,

the coil assembly includes a substrate, a mounting member provided on the substrate, and a coil provided on the substrate so as to surround the mounting member,

the method for manufacturing a lens driving device is characterized by comprising the following steps:

providing the mounting component on the substrate; and

and a step of directly winding the coil around the mounting member and providing the coil on the substrate.

13. A method of manufacturing a camera device, comprising: a step of incorporating the lens driving device manufactured by the method for manufacturing a lens driving device according to claim 12.

14. A method of manufacturing an electronic device, comprising: a step of incorporating the lens device manufactured by the method for manufacturing a lens device according to claim 13.

Technical Field

The invention relates to a lens driving device, a camera device, an electronic apparatus, and methods of manufacturing the same.

Background

In general, a small camera device is mounted on an electronic device such as a portable terminal such as a smartphone. Such a camera device is equipped with a lens driving device that drives a lens, and realizes an auto-focusing function that automatically performs focusing when shooting an object or a shake correction function that optically corrects a shake (vibration) occurring during shooting to reduce image blur by driving the lens.

As a lens driving device for realizing such a function, a coil assembly (assembly) is formed by disposing a coil for driving on a substrate, and the coil assembly is disposed at a predetermined position in the lens driving device. In such a coil assembly, in order to achieve a reduction in size of the device, a mounting member is disposed so as to be positioned inside the inner periphery of the coil (for example, patent document 1).

Patent document 1: international publication No. WO2016/166730

In the conventional lens driving device, when the coil is mounted on the outer periphery of the mounting member, a gap must be provided between the mounting member and the inner periphery of the coil to prevent the coil from colliding with the mounting member and damaging the coil. Therefore, the inner peripheral diameter of the coil cannot be reduced, and the coil thickness (i.e., the number of turns) of the coil cannot be increased.

Disclosure of Invention

The present invention is directed to provide a lens driving device, a camera device, an electronic apparatus, and methods for manufacturing the same, which solve the above problems and can increase the coil thickness.

In order to achieve the above object, a lens driving device according to the present invention includes: a lens carrier (carrier) for holding a lens; and a coil unit for driving the lens carrier, the coil unit including a substrate, a mounting member provided on the substrate, and a coil provided on the substrate so as to surround the mounting member, the mounting member including adjacent 1 st and 2 nd corner portions and a 3 rd corner portion facing the 1 st corner portion, the coil being in contact with the 1 st to 3 rd corner portions.

In addition, according to another aspect of the present invention, there is provided a camera device including the lens driving device.

Further, according to still another aspect of the present invention, there is provided an electronic apparatus including the camera device.

In another aspect of the present invention, there is provided a method of manufacturing a lens driving device including: a lens carrier for holding a lens; and a coil block for driving the lens carrier, the coil block having a substrate, a mounting member provided on the substrate, and a coil provided on the substrate so as to surround a periphery of the mounting member, the manufacturing method comprising: providing the mounting component on the substrate; and a step of directly winding the coil around the mounting member and providing the coil on the substrate.

In another aspect of the present invention, there are provided a method for manufacturing a camera device and a method for manufacturing an electronic apparatus, the method including the same manufacturing method as the method for manufacturing the lens driving device.

According to the present invention, the coil assembly includes the substrate, the mounting member provided on the substrate, and the coil provided on the substrate so as to surround the mounting member, the mounting member includes the adjacent 1 st and 2 nd corner portions and the 3 rd corner portion facing the 1 st corner portion, and the coil is in contact with the 1 st to 3 rd corner portions, and the coil can be reduced in inner peripheral diameter and increased in winding thickness.

In addition, the above-described effects can be obtained by a configuration including a step of providing the mounting component on the substrate and a step of directly winding the coil around the mounting component and providing the coil on the substrate.

Drawings

Fig. 1 is a perspective view illustrating a lens driving apparatus according to an embodiment of the present invention.

Fig. 2 is an exploded perspective view of the lens driving device shown in fig. 1.

Fig. 3 is a perspective view of the lens driving apparatus shown in fig. 1 viewed from the opposite direction.

Fig. 4 is an exploded perspective view of the lens driving device shown in fig. 3.

Fig. 5 is a diagram illustrating a coil assembly in the lens driving device shown in fig. 1.

Fig. 6 is a diagram showing a coil block of another example of the lens driving device shown in fig. 1.

Description of the reference numerals

1a lens driving device; 11a lens carrier; 11a bottom; 11b, 1 st side wall; 11c a 2 nd side wall; 11d front wall; 11e rear wall; 12 supporting the leaf spring; 12a, 1 st spring; 12b, a 2 nd spring; 13a frame body; 13a bottom; 13b a 3 rd side wall; 13c a 4 th sidewall; 13d front wall; 13e rear wall; 130 opening part; 14 a coil assembly; 140 a magnet; 141 mounting a component; 142 coils; 143 a substrate; 15, the 1 st cover plate; 16, 2 nd cover plate; C1-C4 corner; s1, S2 side.

Detailed Description

Hereinafter, an embodiment of the lens driving device 1 according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to the following embodiments, and various modifications can be made without departing from the scope of the present invention.

As shown in fig. 1 to 4, a lens driving device 1 according to an embodiment of the present invention includes: a lens carrier 11 for fixing a lens body not shown; a support plate spring 12 attached to the lens carrier 11 and the frame 13 to support the lens carrier 11; a frame 13 for accommodating the lens carrier 11 and the support plate spring 12; a driving unit for generating a driving force for moving the lens carrier 11 in a predetermined direction; and the 1 st and 2 nd cover plates 15 and 16 covering the side surfaces of the frame body 13. In the present embodiment, the subject side is referred to as the front side, and the opposite subject side is referred to as the rear side. In the present embodiment, a prism (not shown) for bending light from an object is provided on the front side of the lens driving device 1, and an image pickup device (not shown) for receiving light from the object is provided on the rear side. The optical axis direction of the lens body is the front-back direction, also referred to as the X direction.

The lens carrier 11 is made of a resin material, and a 1 st side wall 11b, a 2 nd side wall 11c, a front wall 11d, and a rear wall 11e rise from the bottom 11a to form a box-like body having an upper opening. The lower opening may be open. The 1 st side wall 11b and the 2 nd side wall 11c are formed along the X direction, and respectively connect the front wall 11d and the rear wall 11 e. Light paths are formed in the front wall 11d and the rear wall 11 e. In the present embodiment, a cutout is formed in the front wall 11d, and a through hole is formed in the rear wall 11e so that light from an imaging object passes therethrough. The lens body is housed inside the box-shaped body of the lens carrier 11 from above after the lens driving device 1 is completed. In addition, a recess 11f is provided on the outer side surface of the 1 st side wall 11b of the lens carrier 11, the recess 11f being used for mounting a magnet 140 constituting a part of the driving portion.

The frame 13 is made of a resin material, and a 3 rd side wall 13b, a 4 th side wall 13c, a front wall 13d, and a rear wall 13e rise from the bottom 13a to form a box-like body having an upper opening. The lower opening may be open. In which a lens carrier 11 is accommodated. The 3 rd side wall 13b and the 4 th side wall 13c are formed along the X direction, and respectively join the front wall 13d and the rear wall 13 e. Light paths are formed in the front wall 13d and the rear wall 13 e. In the present embodiment, the front wall 13d and the rear wall 13e are formed with through holes, respectively, so that light from the subject passes therethrough. The 1 st and 2 nd side walls 11b and 11c of the lens carrier 11 face the 3 rd and 4 th side walls 13b and 13c of the frame 13, respectively. An opening 130 for mounting the coil unit 14 is opened in the 3 rd side wall 13b of the housing 13.

The support plate spring 12 has 2 1 st and 2 nd springs 12a and 12b, and supports the lens carrier 11 to be movable with respect to the frame 13. The 1 st and 2 nd springs 12a and 12b each have: a fixed-side mounting portion 12c mounted to the frame 13; a moving-side mounting part 12d mounted on the lens carrier 11; 2 elastic arm parts 12e connecting the fixed-side mounting part 12c and the moving-side mounting part 12 d; and 2 coupling portions 12f that couple the 2 elastic arm portions 12 e. The 2 elastic arm portions 12e and the 2 coupling portions 12f are formed in a ring shape, and light from the subject passes through the inside of the ring. The fixed-side mounting portion 12c of the 1 st spring 12a is mounted on the 4 th side wall 13c on the front wall 13d side of the frame 13, and the moving-side mounting portion 12d is mounted on the front wall 11d on the 1 st side wall 11b side of the lens carrier 11. The fixed-side mounting portion 12c of the 2 nd spring 12b is mounted on the 4 th side wall 13c on the rear wall 13e side of the frame 13, and the moving-side mounting portion 12d is mounted on the rear wall 11e on the 1 st side wall 11b side of the lens carrier 11. In this way, the fixed-side mounting portion 12c and the moving-side mounting portion 12d are mounted on opposite sides with respect to the optical axis.

The drive unit includes: a magnet 140 provided on the 1 st side wall 11b of the lens carrier 11; and a coil block 14 provided on the 3 rd side wall 13b of the frame 13. The coil assembly 14 has a substrate 143 and a coil 142. The magnet 140 is disposed at a position facing the coil 142 of the coil block 14. The magnet 140 is magnetized such that, for example, the front wall 11d side of the surface facing the coil 142 becomes the N pole and the rear wall 11e side becomes the S pole. The coil 142 is wound around the normal direction of the facing surface of the magnet 140.

When a current flows through the coil 142, an electromagnetic force is generated in the coil 142 to move in the X direction. When an electromagnetic force is generated in the coil 142, a reaction force is generated on the magnet 140, and therefore the lens carrier 11 moves in the X direction together with the lens body, not shown, against the elastic force of the support plate spring 12.

On both sides of the frame 13, 1 st and 2 nd cover plates 15 and 16 are provided so as to cover the 3 rd side wall 13b and the 4 th side wall 13 c. These 1 st and 2 nd cover plates 15, 16 function as a protective cover and a shield cover.

Next, the coil unit 14 will be described in detail with reference to fig. 5.

Fig. 5 is a view of the 3 rd side wall 13b of the housing 13 viewed from the inside of the housing 13, and the coil 142 of the coil unit 14 and the mounting member 141 around which the coil 142 is wound are exposed from the opening 130 of the 3 rd side wall 13b of the housing 13. The coil unit 14 includes a substrate 143, a mounting member 141 provided on the substrate 143, and a coil 142 provided on the substrate 143 so as to surround the mounting member 141. The mounting member 141 is mounted on the substrate 143, and the substrate 143 of the coil block 14 is mounted on the 3 rd side wall 13b of the housing 13 from the outer surface by adhesion or the like, as shown in fig. 4. The mounting member 141 and the coil 142 are exposed from the opening 130 to the back surface of the housing 13, and the coil 142 faces the magnet 140. The opening 130 may be a bottomed hole closed on the back side. The substrate 143 is a printed board or a flexible printed board on which the mounting component 141 is mounted. The mounting member 141 may be, for example, an IC incorporating a hall element, a driver IC, or the like, but is not limited thereto, and may be a general electronic component for mounting. The mounting member 141 has a rectangular shape including a square, but may have another shape.

The coil 142 is formed of an electric wire having a surface coated with an insulating material, and is directly wound around the mounting member 141 mounted on the substrate 143. As shown in fig. 5, the mounting member 141 has adjacent 1 st corner C1 and 2 nd corner C2, and 3 rd corner C3 opposite to the 1 st corner C1. At this time, the coil 142 is in contact with the 1 st to 3 rd corner portions C1 to C3. Therefore, it is not necessary to provide a gap between the mounting member 141 and the inner periphery of the coil 142 in order to avoid damage to the coil 142 due to the coil 142 hitting the mounting member 141 when the coil 142 is mounted on the outer periphery of the mounting member 141 as in the conventional art. Specifically, it is not necessary to enlarge the inner peripheral diameter of the coil 142 so that the 1 st to 3 rd corner portions C1 to C3 do not simultaneously contact the coil 142. Thus, the inner peripheral diameter of the coil 142 can be reduced, and the winding thickness can be increased. Here, the winding thickness is a distance between the outer circumference and the inner circumference of the coil 142. That is, the number of turns can be increased without increasing the outer peripheral diameter of the coil 142.

The 1 st to 3 rd corner portions C1 to C3 are preferably formed in a right triangle shape as shown in fig. 5 or an acute triangle shape to fix the coil 142. The coil 142 is preferably disposed so as to closely contact the 1 st side surface S1 between the 1 st corner C1 and the 2 nd corner C2 of the mounting member 141 and the 2 nd side surface S2 including the 3 rd corner C3 and facing the 1 st side surface S1. In the example shown in fig. 5, the mounting member 141 has a rectangular shape, and the triangle formed by the 1 st to 3 rd corner portions C1 to C3 is a right-angled triangle having the 2 nd corner portion C2 at right angles. The coil 142 is grounded to the 1 st to 3 rd corner portions C1 to C3. The 2 nd side surface S2 is formed between the 3 rd corner C3 and the 4 th corner C4 opposed to the 2 nd corner C2, and the coil 142 is closely attached to both the side surfaces and also in contact with the 4 th corner C4.

As shown in fig. 6, the coil unit 14 includes a resin molded body made of a resin material formed on the substrate 143 so as to cover the outer periphery of the coil 142. The resin molded body is integrally molded with the coil 142 and the substrate 143 so as to cover the outer periphery of the coil 142 and match the outer periphery of the coil 142 with the inner periphery of the resin molded body. Therefore, it is not necessary to provide a gap between the resin molded body and the outer periphery of the coil 142 in consideration of a dimensional error between the coil 142 and the 3 rd side wall 13b of the housing 13 or the like in order to avoid damage to the coil 142 due to the coil 142 hitting the resin molded body when the coil 142 is inserted into the opening of the resin molded body as in the conventional art. Therefore, the outer peripheral diameter of the coil 142 can be increased by the gap, and the winding thickness of the coil 142 can be increased. That is, the number of turns of the coil 142 can be increased by effectively utilizing the size of the outer diameter of the coil 142. Further, the substrate 143 formed integrally can prevent the resin molded body from being strained after molding.

The end of the coil 142 on the winding side, i.e., the winding start end, can be disposed on the substrate 143 near the mounting member 141 and electrically connected thereto. The coil 142 can be wound to the outside of the position where the winding start end is provided in a state where the mounting member 141 is mounted on the substrate 143. That is, at this time, the winding start end of the coil 142 is disposed at a position overlapping the coil 142 when viewed from the winding axis direction of the coil 142. This enables further reduction in the size of the coil unit 14. The winding end, which is an end of the coil 142 on the winding end side, is connected to the substrate 143 outside the coil 142. The winding start end may be provided outside the coil 142.

Next, a method for manufacturing the lens driving device 1 according to the present embodiment will be described.

The method for manufacturing the lens driving device 1 includes: a step of mounting the mounting component 141 on the substrate 143; and a step of directly winding the coil 142 around the mounting member 141 and providing the same on the substrate 143.

In order to manufacture a structure described later, a step of integrally molding the resin molded body with the coil 142 and the substrate 143 may be provided on the substrate 143 so that the resin molded body covers the outer periphery of the coil 142 and the outer periphery of the coil 142 is aligned with the inner periphery of the resin molded body.

Next, a description is given of an application example. The lens driving device 1 may be incorporated in a camera device. That is, the camera device may be manufactured by incorporating the lens driving device 1 manufactured by the above-described manufacturing method. The coil module 14 includes a substrate 143, a mounting member 141 provided on the substrate 143, and a coil 142 provided on the substrate 143 so as to surround the mounting member 141, the mounting member 141 includes adjacent 1 st and 2 nd corner portions C1 and C2, and a 3 rd corner portion C3 facing the 1 st corner portion C1, and the coil 142 is in contact with the 1 st to 3 rd corner portions C1 to C3. Therefore, the inner circumference of the coil can be enlarged inward, and the coil thickness can be increased. As a result, the number of turns can be increased without increasing the outer diameter of the coil 142, and thus a camera device having an improved autofocus function or shake correction function can be obtained.

The camera device including the lens driving device 1 may be incorporated in an electronic apparatus. That is, the electronic device may be manufactured by incorporating the camera device manufactured by the above-described manufacturing method. Examples of the electronic device include a mobile terminal such as a smartphone, a game machine, and a personal computer.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configurations are not limited to the embodiments, and may be designed without departing from the scope of the present invention.

For example, although the driving unit is configured to provide the magnet 140 on the lens carrier 11 side and the coil unit 14 on the frame 13 side in the present embodiment, the driving unit may be configured to provide the coil unit 14 on the lens carrier 11 side and the magnet 140 on the frame 13 side. That is, the coil unit 14 can be attached to either the movable side (mover) side, which is the side where the lens carrier 11 moves, or the fixed side (stator) side, which is the side where the frame 13 is fixed.

In the present embodiment, 1 coil unit 14 is provided to move the lens carrier 11 in one direction, but a plurality of coil units 14 may be provided. Further, a plurality of coil units 14 may be arranged to move a movable member such as the lens carrier 11 in a plurality of directions.

The coil 142 may be wound so as to be closely attached to 3 side surfaces or 4 side surfaces of the mounting member 141.

The coil unit 14 is attached to the frame 13 by an adhesive or the like, but may be integrally molded with a resin molded body made of a resin material such as the frame 13 or the lens carrier 11. That is, the resin molded body is formed on the substrate 143 so as to cover the outer periphery of the coil 142. At this time, the outer periphery of the coil 142 coincides with the inner periphery of the resin molded body. The resin molded body may be at least a part of the lens carrier 11 or the frame 13, not the lens carrier 11 or the frame 13 itself. This can increase the outer diameter of the coil 142 and increase the winding thickness.