CN210742593U - Optical member driving device, camera device, and electronic apparatus - Google Patents

Abstract

The utility model provides an optical component drive arrangement, camera device and electronic equipment that can fix SMA cable with abundant intensity. The OIS lens driving device (2) is provided with a base (3), an FPC (7) fixed on the base (3), a lower curling plate (4) fixed on the FPC (7), an upper curling plate (5) sliding on the lower curling plate (4), and a plurality of SMA cables (6) with two ends fixed on the lower curling plate (4) and the upper curling plate (5). Thus, the lower crimp plate (4) includes a 1 st plate (40A) and a 2 nd plate (40B) which are a plurality of plates having one crimp portion, and the plates are fixed to the FPC (7) in a state of being separated from each other and are electrically connected.

Description

Optical component drive device, camera device, and electronic equipment

technical field

The utility model relates to an optical component driving device, a camera device and an electronic device used in electronic equipment such as smart phones.

Background technique

In a camera device equipped with an OIS (Optical Image Stabilizer) function, an SMA (Shape Memory Alloy) wire is arranged between a movable member that holds the optical member and a support member that supports the optical member. A camera device in which the movable part and the supporting part move relative to each other through the expansion and contraction of the SMA cable. There is Patent Document 1 as a document that discloses a technique related to such a camera device. The suspension assembly described in Patent Document 1 includes a movable member made of stainless steel as a plate body, and a support member of the plate body provided with a wiring portion made of FPC (Flexible Printed Circuits) on a base. . The movable member and the support member are arranged to face each other with a bearing therebetween, and the corners of the support member in the diagonal direction and the corners of the movable member in the diagonal direction intersecting with the movable member have curled portions. The SMA cable is routed between the crimp of the movable part and the crimp of the support part.

【Existing technical documents】

【Patent Literature】

[Patent Document 1] International Publication No. WO2018/129185A

Utility model content

【The problem to be solved by the utility model】

However, in the technique of Patent Document 1, the wiring portion on the base of the support member contacts the curled portion at the corner, and the SMA cable is crimped to each wiring portion on the curled portion to fix the SMA cable. Therefore, there is a problem that the fixing strength of the SMA cable is weak.

The present invention has been made in view of such a problem, and an object of the present invention is to provide an optical component drive device, a camera device, and an electronic device capable of fixing an SMA cable with sufficient strength.

【Means for solving problems】

In order to solve the above-mentioned problems, an optical component drive device according to a preferred aspect of the present invention is characterized by comprising: a base; an FPC fixed to the base; a lower curling plate fixed to the FPC; an upper crimping plate sliding on a lower crimping plate; and a plurality of SMA cables having both ends fixed to the lower crimping plate and the upper crimping plate, the lower crimping plate including a plurality of plates having one crimp, each The plates are fixed on the FPC in a state of being isolated from each other and are electrically connected.

In this aspect, the lower curling plate may have a plate piece, the plate piece may not have the curling portion, and the arm portion extending from the body portion of the upper curling plate may be electrically connected to the plate piece.

Alternatively, each of the plates may be directly soldered to pads provided on the surface of the FPC.

A camera apparatus according to another preferred aspect of the present invention is characterized by being provided with the above-mentioned optical member driving device.

An electronic apparatus according to another preferred aspect of the present invention includes the above-mentioned camera device.

【Utility model effect】

The optical component driving device of the present invention includes: a base; an FPC fixed on the base; a lower curling plate fixed on the FPC; an upper curling plate sliding on the lower curling plate; and both ends A plurality of SMA cables fixed to the lower crimp plate and the upper crimp plate, the lower crimp plate includes a plurality of plates having one crimp, and each plate is fixed on the FPC in a state of being isolated from each other and electrical connection. Thus, on the FPC, even if a separate wiring connected to a terminal connected to an external power supply from each board is provided in advance, it is not necessary to provide wiring to each board itself. Therefore, instead of crimping the SMA cable to each wiring portion, the SMA cable is directly crimped to the crimp portion, and it is possible to provide an optical component driving device, a camera device, and an electronic device capable of fixing the SMA cable with sufficient strength.

Description of drawings

1 is a front view of a smartphone 99 , which is an electronic device on which a camera device 1 including an OIS lens drive device 2 that is an optical component drive device according to an embodiment of the present invention is mounted.

FIG. 2 is a perspective view of the camera device 1 of FIG. 1 .

FIG. 3 is a perspective view of the OIS lens driving device 2 of FIG. 2 .

FIG. 4 is an exploded perspective view of the OIS lens driving device 2 of FIG. 2 .

(A) of FIG. 5 is a view showing a part of the upper curling plate 5 of the OIS lens driving device 2 of FIG. 2 viewed from an obliquely lower side, and (B) is a view showing the convex part 50 of the upper curling plate 5 and the first part of the lower curling plate 4 3. The cross-sectional view of the contact part of the plate piece 40C, (C) is the figure which looked at a part of the upper curl plate 5 and the lower curl plate 4 from the obliquely upper side.

【Symbol Description】

1 camera unit; 2 OIS lens drive unit; 3 base; 4 lower crimp plate; 5 upper crimp plate; 6 SMA cable; 7 FPC; 8 lens body; 36 support piece; 37 through hole; 38, 88 terminal block; 39 terminal; 40 A first plate; 40 B second plate; 40 C third plate; 41, 43, 51 notches; 42 A, 42B, 52A, 52B crimped part; 55 wrist; 56 connection; 57 through hole; 71 pad; 80 AF actuator; 90 image sensor; 98 case; 99 smartphone.

Detailed ways

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. As shown in FIG. 1 , the camera device 1 is housed in a casing of a smartphone 99 . The camera device 1 includes: a lens body 8 as an optical component; an image sensor 90 that photoelectrically converts light incident from a subject via the lens body 8; AF actuator 80; OIS lens driving device 2 that drives AF actuator 80 in a plane orthogonal to the optical axis; and housing 98 covering these components. The lens body 8 as an optical component is driven by the OIS lens driving device 2 in an in-plane direction orthogonal to the optical axis.

Hereinafter, the optical axis direction along the optical axis of the lens body 8 is appropriately referred to as the Z direction, one direction orthogonal to the Z direction is appropriately referred to as the X direction, and the direction orthogonal to both the Z direction and the X direction is appropriately referred to as the X direction. Appropriately referred to as the Y direction. In addition, the +Z side on the subject side of the optical axis of the lens body 8 may be referred to as the upper side, and the Z side on the opposite side of the subject, that is, the side where the image sensor 90 is provided, may be referred to as the lower side.

As shown in FIG. 4 , the OIS lens driving device 2 includes: a base 3; a lower curling plate 4 fixed to the base 3; an upper curling plate 5 sliding on the lower curling plate 4; both ends fixed to the lower curling plate 4 and 4 SMA cables 6 of the upper crimp board 5. Hereinafter, the structural details of each part will be described.

The base 3 has a thin quadrilateral shape. A perfectly circular through hole 37 is provided in the center of the base 3 . On the X-side edge of the base 3 , a support piece 36 and a terminal block 38 are provided. The support piece 36 supports the terminal block 88 of the AF actuator 80 from the back side. The AF actuator 80 and the terminal block 88 are connected by FPC. Five terminals 39 are provided on the terminal block 38 of the base 3 . One of the five terminals 39 is a ground terminal. The remaining 4 are current input terminals.

On the upper surface of the base 3, the FPC 7 is fixed. Pads 71 are provided at six locations around the periphery of the through-hole 37 of the FPC 7 . The FPC 7 is a circuit board, and has wirings from the pads 71 to the terminals 39 .

The lower curling plate 4 is arranged so that the pair of the first plate piece 40A, the pair of the second plate piece 40B, and the pair of the third plate piece 40C having arc-shaped curved sides face inwards with the respective curved sides, and the overall shape has a substantially square shape. . The first plate piece 40A, the second plate piece 40B, and the third plate piece 40C are made of, for example, a conductive material such as SUS. The first plate piece 40A, the second plate piece 40B, and the third plate piece 40C are fixed to the FPC 7 in a state of being isolated from each other.

Each pair of the first plate piece 40A, the second plate piece 40B, and the third plate piece 40C is arranged at a point-symmetrical position with the center of the through hole 37 as the center. Therefore, the first plate piece 40A and the second plate piece 40B are located on both sides of a diagonal line sandwiching the substantially square lower curled plate 4, and the third plate piece 40C is located between the first plate piece 40A and the second plate The pieces 40B are sandwiched between the positions facing the other diagonal direction of the substantially square shape.

The notch 41 is provided in the curved side of the 1st plate piece 40A, and the curled part 42A is provided in the corner position of the said substantially square. The curling portion 42A is formed by bending a rectangular piece protruding outward in the Y direction with the corner portion as a base end, and then folding it back toward the base end side. Between the curled portion 42A and the curved side, the first plate piece 40A is bent so that the height is equal to that of the curled portion 52A of the upper curled plate 5 to be described later to provide a step.

The notch 41 is provided in the curved side of the 2nd plate piece 40B, and the curling part 42B is provided in the said substantially square corner position. The curling portion 42B is formed by bending a rectangular piece protruding outward in the X-direction with the corner portion as a base end toward the upper side, and then folded back toward the base end side. Between the curled portion 42B and the curved side, the second plate piece 40B is bent so that the height is equal to that of the curled portion 52B of the upper curled plate 5 to be described later to provide a step.

The notch 41 is provided in the curved side of the 3rd plate piece 40C, and the notch 43 is provided in the corner part which intersects with the two sides on the opposite side of the curved side.

The first board 40A, the second board 40B, and the third board 40C are positioned so that the respective cutouts 41 are directly above the pads 71 of the FPC 7 and are directly soldered to the pads 71 of the FPC 7 . The two first plates 40A and the two second plates 40B are respectively electrically connected to the current input terminals of the five terminals 39 of the terminal block 38 via the wiring of the FPC 7 . The two third plates 40C are electrically connected to one ground terminal of the five terminals 39 of the terminal block 38 via the wiring of the FPC 7 .

The upper crimping plate 5 is made of, for example, a conductive material such as SUS, and has a substantially square body portion 54 and two arm portions 55 extending point-symmetrically outward from two end sides of the body portion 54 parallel to the Y direction. . In the center of the main body portion 54, a through hole 57 is provided. In the main body portion 54 , notches 51 are provided at six locations around the periphery of the penetrating hole 57 . The body portion 54 is provided with protrusions 50 protruding downward at four locations around the periphery of the through hole 57 . As shown in FIG. 5(A) , the convex portion 50 protrudes smoothly from the main body portion 54 , and the lower surface thereof has a circular flat plate shape. Since the convex portion 50 can be formed integrally with the upper crimp plate 5 by punching or the like, it is superior in impact resistance such as drop, for example.

Corners facing each other in one diagonal direction of the upper curling plate 5 are rounded by chamfering, and corners facing each other in the other diagonal direction are provided with two curling portions 52A and 52B, respectively. The curling portion 52A is formed by bending a rectangular piece whose base end protrudes outward in the Y direction at the corner portion to the upper side, and then folded back toward the base end side. The curling portion 52B is formed by bending the rectangular piece whose base end is the base end protruding outward in the X direction, and then folded back toward the base end side.

The arm portion 55 starts from the base end at the position where the curl portion 52B of the end side parallel to the Y direction of the main body portion 54 is close to the corner portion, protrudes in the Y direction, and extends along the end side in the Y direction until it does not exist. The corner portion on one side of the curl portion 52B extends around the outer side of the corner portion and along the edge in the X direction to the front of the curl portion 52A. A connecting portion 56 is provided at the front end of the wrist portion 55 . Two of the protruding portions 50 are provided in the body portion 54 at positions close to the connecting portion 56 .

The lower curling plate 4 and the upper curling plate 5 are sequentially placed on the base 3 so that the substantially square corners of the respective substantially square corners overlap with the substantially square corners of the base 3 . The curled parts 42A and 42B of the lower curling plate 4 are arranged at one diagonal corner of the substantially square, and the curled parts 52A and 52B of the upper curling plate 5 are arranged at the other diagonal corner of the substantially square. At this time, the curled portion 42A and the curled portion 52A are aligned in the X direction, and the curled portion 42B and the curled portion 52B are aligned in the Y direction. In addition, the arm portion 55 is arranged between the chamfered corner portion of the main body portion 54 and the step formed in the first plate piece 40A and the second plate piece 40B. In addition, the notch 51 of the upper crimp plate 5 is directly above the notch 41 of the lower crimp plate 4 , and the solder is not in contact with the upper crimp plate 5 .

As shown in FIG. 5(B) , two of the four convex portions 50 in the upper curling plate 5 are in contact with the abutted portions of the third plate piece 40C of the lower curling plate 4 . The remaining two convex portions 50 are in contact with the abutted portions of the second plate piece 40B. A low friction layer is formed on the surface of the convex portion 50 , and an insulating layer is formed on the surfaces of the abutted portions of the third plate piece 40C and the second plate piece 40B with which the convex portion 50 abuts. In addition, a low friction layer may be formed on the surfaces of the contacted portions of the third plate piece 40C and the second plate piece 40B, and an insulating layer may be formed on the surface of the convex portion 50 . Alternatively, the lower curling plate 4 may be provided with a convex portion, and the upper curling plate 5 may be provided with a contacted portion.

It will be described in detail. The upper curl plate 5 is provided with one of the convex portion 50 or the abutted portion, and the first plate piece 40A or the second plate piece 40B of the lower curl plate 4 is provided with the other of the convex portion or the abutted portion. In this case, as will be described later, there is a potential difference between the upper crimp plate 5 and the lower crimp plate 4 . Therefore, an insulating layer is provided on at least one of the surface of the convex portion or the surface of the abutted portion, and the two are insulated from each other. Therefore, between the two, it is preferable that the friction coefficient is small, and the low friction layer with the small friction coefficient is provided on the surface, that is, the surface of the convex part without the insulating layer or the surface of the abutted part or the surface of the insulating layer.

When the upper curl plate 5 is provided with one of the convex portion 50 or the abutted portion, and the third plate piece 40C of the lower curl plate 4 is provided with the other one of the convex portion or the contacted portion, As will be described later, the upper crimp plate 5 and the lower crimp plate 4 have the same potential. Therefore, it is not necessary to provide an insulating layer, and the convex portion and the abutted portion can be in direct contact with each other. In addition, the layers described in the previous paragraphs may be provided, or only the low friction layer may be provided without the insulating layer.

As shown in FIG. 5(C) , the connection portion 56 of the upper curl plate 5 is joined to the upper surface of the third plate piece 40C, and is electrically connected to the third plate piece 40C. In addition, the two ends of the SMA cable 6 extending in the X direction are respectively crimped and fixed to the crimped portion 42A and the crimped portion 52A, and the two ends of the SMA cable 6 extending in the Y direction are crimped and fixed to the crimped portion, respectively. portion 42B and curled portion 52B.

The five terminals 39 of the terminal block 38 are connected to an external power source. Thereby, the external power supply→current input terminal→wiring of the FPC 7→the first plate piece 40A or the second plate piece 40B of the lower crimp plate 4→SMA cable 6→the upper crimp plate 5→the third plate of the lower crimp plate 4 are formed The SMA cable 6 is supplied with current through a current path such as the sheet 40C → the wiring of the FPC 7 → the ground terminal → the external power supply. When an electric current is supplied to the SMA cables 6, the SMA cables 6 are respectively contracted by heat generated by energization. By the contraction of the SMA cable 6, the upper crimping plate 5 and the AF actuator 80 supported by the upper crimping plate 5 move in the in-plane direction of XY while sliding on the lower crimping plate 4.

The above are the structural details of the present embodiment. The OIS lens drive device 2 as the optical component drive device of the present embodiment includes a base 3 , an FPC 7 fixed to the base 3 , a lower curl plate 4 fixed to the FPC 7 , and an upper curl plate slid on the lower curl plate 4 5 and a plurality of SMA cables 6 with both ends fixed to the lower crimp plate 4 and the upper crimp plate 5 . Accordingly, the lower crimp plate 4 includes a first plate piece 40A and a second plate piece 40B that are a plurality of plate pieces having one crimp portion, and each plate piece is fixed to the FPC 7 and electrically connected to each other in a state of being isolated from each other. Thereby, on the FPC 7, even if a separate wiring connected to the terminal 39 connected to the external power supply from each board is provided in advance, it is not necessary to provide wiring to each board itself. Therefore, the SMA cable 6 can be directly crimped to the crimped portion without crimping the SMA cable 6 to each wiring portion. Therefore, according to the present embodiment, it is possible to provide an optical component driving device, a camera device, and an electronic apparatus capable of fixing the SMA cable 6 with sufficient strength.

In addition, in the OIS lens driving device 2 as the optical component driving device of the present embodiment, the lower curling plate 4 has the third plate piece 40C, and the third plate piece 40C is a plate piece that does not have a curling portion, and the plate 5 is curled from the upper part. The arm portion 55 extending from the main body portion 54 is electrically connected to the third plate 40C. Accordingly, even if a separate wiring from the third board 40C to the grounding terminal 39 is provided in advance on the FPC 7, it is not necessary to provide wiring to the third board 40C itself. Therefore, according to the present embodiment, all the electrical connections are realized by the same structure, and the manufacture is easy.

In addition, in the above-mentioned embodiment, each plate piece which is the lower curled plate 4 does not need to be produced by a separate press working. It is also possible to produce a member in which all of the plate pieces forming the lower crimp plate 4 are integrally formed by pressing, and after fixing this to the FPC 7 , the connection portion of each plate piece may be cut out.

Claims (5)

1. An optical component driving device is characterized by comprising:

a base;

an FPC fixed on the base;

a lower crimping plate fixed to the FPC;

an upper curl plate that slides on the lower curl plate; and

a plurality of SMA wires having both ends fixed to the lower crimping plate and the upper crimping plate,

the lower crimp plate includes a plurality of plate pieces having one crimp portion, and the plate pieces are fixed to the FPC in a state of being separated from each other and are electrically connected.

2. Optical component driving device according to claim 1,

the lower curl plate has a plate piece that does not have the curl portion, and a wrist portion extending from a body portion of the upper curl plate is electrically connected to the plate piece.

3. Optical component driving device according to claim 2,

the sheets are directly soldered to pads provided on the surface of the FPC.

4. A camera device comprising the optical member driving device according to any one of claims 1 to 3.

5. An electronic device comprising the camera device according to claim 4.

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