JP2013011679A - Drive module and camera module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drive module capable of easily preventing a deviation of relative positions between the drive module and a mounted member at a low cost without managing projection amount and a spreading region of a connection member, and a camera module including the drive module.SOLUTION: A drive module includes: a first holding member 15A and a second holding member 15B for feeding power to a Shape Memory Alloy (SMA) wire; a module plate member 8 arranged on a -Z side of a module frame 5 (support body); and an intermediate member 80 arranged between the module frame 5 and the module plate member 8. A first power feeding terminal section 9A is formed integrally with the first holding member 15A and a second power feeding terminal section 9B is formed integrally with the intermediate member 80. A connection section 70 for electrically connecting the intermediate member 80 and the second holding member 15B by a connection member 72 is provided between the intermediate member 80 and the second holding member 15B.

Description

  The present invention relates to a drive module and a camera module including the drive module.

  2. Description of the Related Art Conventionally, various drive modules that drive using a shape memory alloy (hereinafter abbreviated as SMA) wire to drive a driven body such as an imaging lens unit have been proposed. . In addition, the drive module constitutes a camera module used in a small electronic device such as a mobile phone with a camera function by being attached to a member to be attached such as a control board provided with an image sensor (for example, a patent) Reference 1).

FIG. 10 is an exploded perspective view of the drive module 1 of Patent Document 1. FIG.
FIG. 11 is a partial cross-sectional view of the drive module 1 taken along line XX of FIG.
In the following description, the drive module 1 is described using a cylindrical coordinate system of Z, R, and θ as necessary. Specifically, the direction along the central axis O of the drive module 1 is defined as the Z direction, and the drive module 1 is attached to the attached member 30 (not shown in FIG. 10, see FIG. 11) (see FIG. 10 and FIG. 10). The lower side in FIG. 11 is defined as the −Z side, and the opposite side (the upper side in FIGS. 10 and 11) is defined as the + Z side. Further, the direction orthogonal to the central axis O is defined as the R direction, the central axis O side is defined as the -R side, and the outside of the drive module 1 is defined as the + R side. Further, the circumferential direction of the central axis O of the drive module 1 is defined as the θ direction, the clockwise direction when viewed from the + Z side is defined as the + θ side, and the counterclockwise direction is defined as the −θ side.

  As shown in FIG. 10, the driving module 1 shown in Patent Document 1 includes a lens frame 4 (driven body) to which a lens is attached and a cylindrical module that accommodates the lens frame 4 movably along the Z direction. A frame 5 (support), an upper plate spring member 6 and a lower plate spring member 7 (metal plate member) for adjusting the posture of the lens frame 4 and applying an urging force along the Z direction to the lens frame 4 as necessary; And a module plate member 8 disposed at the end of the module frame 5 on the −Z side.

  Further, as shown in FIG. 11, the −Z side end surface 8 b (hereinafter referred to as “module side reference surface 8 b”) of the module plate member 8 is the + Z side end surface 30 a (hereinafter “attached member”) of the mounted member 30. Side reference surface 30a "), and the relative position in the Z direction between the drive module 1 and the mounted member 30 is determined.

An SMA wire 10 is stretched around the cylinder outer periphery of the module frame 5. The ends of the SMA wire 10 are gripped by a pair of wire holding members 15A and 15B (first holding member, second holding member). The pair of wire holding members 15A and 15B have terminal portions 15a and 15a extending to the −Z side.
Further, a pair of electrodes 9 a and 9 b having terminal portions 9 c are provided on the −Z side from the module plate member 8. The module-side reference surface 8b is formed with a depressed portion 90 that is depressed toward the + Z side. A pair of electrodes 9a and 9b are arranged on the bottom surface of the depression 90.

  In the drive module 1, Joule heat is generated in the SMA wire 10 by supplying power to the SMA wire 10 from an external power source (not shown) via the electrodes 9 a and 9 b. The SMA wire 10 is contracted by this heat generation, lifts the lens frame 4, and moves the lens frame 4 along the Z direction.

  Here, on the −Z side with respect to the depressed portion 90 of the module plate member 8, a connection portion 70 that electrically connects the pair of wire holding members 15 </ b> A and 15 </ b> B and the electrodes 9 a and 9 b with a connection member 72 such as solder. Is formed. And in the area | region corresponding to the connection part 70 in the to-be-attached member side reference surface 30a of the to-be-attached member 30, in order to avoid interference with the connection member 72, the escape part 30b is formed.

JP 2009-128708 A

However, the drive module 1 described above has the following problems.
As shown in FIG. 11, since the connection member 72 is provided on the −Z side with respect to the depressed portion 90 of the module plate member 8, there is a clearance between the connection member 72 and the attached member side reference surface 30 a of the attached member 30. Narrow.
Here, when the connecting member 72 protrudes to the −Z side from the bottom surface of the escape portion 30 b of the attached member 30, interference with the connection member 72 cannot be avoided by the escape portion 30 b of the attached member 30, and the attached member 30. And the connecting member 72 may interfere with each other.
Further, if the connection member 72 extends in the R direction and the θ direction from the predetermined range on the −Z side surface of the electrodes 9a and 9b, the corner portion 30c and the connection member 72 in the escape portion 30b of the attached member 30 may interfere with each other. is there.

As a result, the module-side reference surface 8b of the module plate member 8 and the mounted member-side reference surface 30a of the mounted member 30 cannot come into contact with each other, and the relative position in the Z direction between the drive module 1 and the mounted member 30 is displaced. There is a risk of being fixed. And since the shift | offset | difference of the relative position of this drive module 1 and the to-be-attached member 30 causes the shift | offset | difference of the focus position of a camera module, there exists a possibility that manufacturing defects, such as imaging quality defect, may generate | occur | produce.
Therefore, in the prior art, in order to prevent the relative position between the drive module 1 and the mounted member 30 from being displaced, it is necessary to manage the amount of protrusion of the connecting member 72 toward the −Z side and the spreading area in the R direction and θ direction. There is. For this reason, the manufacturing process becomes complicated and the manufacturing cost tends to increase.

  Therefore, the present invention provides a drive module that can prevent the relative displacement between the drive module and the mounted member easily and at low cost without managing the protruding amount and the spread area of the connection member, and a camera module including the drive module. The issue is to provide

  In order to solve the above problems, a drive module according to the present invention includes a cylindrical support, a driven body disposed coaxially with a central axis of the support inside the support, and the support A driving unit configured to reciprocate the driven body along an axial direction; a driving unit disposed along an outer peripheral surface of the support; the driving unit is held; and the driving unit is electrically connected to the driving unit. The first holding member and the second holding member for supplying power, the module plate member arranged on one side of the support in the axial direction, and the support plate and the module plate member in the axial direction are arranged between the support plate and the module plate member. And at least one metal plate member, a first power supply terminal portion that protrudes from the one side of the module plate member and enables power supply to the first holding member from the outside, and the module plate member Projected on one side and outside And a second power supply terminal portion that enables power supply to the second holding member, wherein the one side surface of the module plate member is attached to a mounted member, and the first power supply The terminal portion is integrally formed with the first holding member, the second power feeding terminal portion is integrally formed with the metal plate member, and the metal plate member and the second holding member are electrically connected by a connecting member. It is characterized in that a part is provided.

According to the present invention, since the connecting portion with the second holding member is formed on the metal plate member disposed on the other side of the module plate member, the connecting portion is easily accommodated within the thickness of the module plate member. It can suppress that a member protrudes from the surface of one side of a module board member. This prevents interference between the connecting member and the mounted member, so that the one surface of the module plate member and the mounted member are securely brought into contact with each other so that the drive module and the mounted member in the axial direction The position can be determined. Therefore, it is possible to prevent the displacement of the relative position between the drive module and the attached member easily and at a low cost without managing the protruding amount and spreading area of the connecting member.
Further, since the first power supply terminal portion is formed integrally with the first holding member and the second power supply terminal portion is formed integrally with the metal plate member, electrodes 9a and 9b having the terminal portion 9c as in the prior art (FIG. 10) is not necessary. Therefore, the number of parts can be reduced, and a low-cost drive module can be provided.

  The driving means includes a shape memory alloy wire that contracts when supplied with power, the first holding member holds one end of the shape memory alloy wire, and the second holding member holds the shape memory. The other end of the alloy wire is held, the driven body includes a guide protrusion protruding outside the support, and the shape memory alloy wire is engaged with the guide protrusion. Yes.

  According to the present invention, since the driving means has the shape memory alloy wire that contracts when supplied with power, the driven body can be easily moved by supplying power to the shape memory alloy wire.

  Further, the metal plate member is an intermediate member that covers the other surface of the module plate member and protects the module plate member.

  According to the present invention, since the intermediate member disposed for the purpose of protecting the module plate member is used as the metal plate member, there is no need to newly add a metal plate member. Therefore, the manufacturing cost of the drive module can be suppressed.

  The metal plate member is a one-side plate spring member that is connected to the one side of the support and elastically holds the driven body.

  According to the present invention, since the one side leaf spring member provided for the purpose of elastically holding the driven body is used as the metal plate member, it is not necessary to add a new metal plate member. Therefore, the manufacturing cost of the drive module can be suppressed.

  In addition, an opening that communicates the one side surface and the other side surface of the module plate member is formed at a position corresponding to the connection portion in the module plate member.

  According to the present invention, by providing the opening at a position corresponding to the connection portion, the spreading region of the connection member can be regulated by the inner surface of the opening. In particular, when a clearance portion similar to the conventional technology is formed at a position corresponding to the opening portion of the attached member, it is possible to prevent interference between the corner portion of the clearance portion and the connection member without managing the expansion area of the connection member. it can.

  Further, the metal plate member is characterized in that gold plating is performed only in a region corresponding to the opening.

  According to the present invention, since gold plating is applied only to the region used for connection between the second holding member and the metal plate member, a low-cost drive module can be formed.

  In addition, a concave portion is formed on the one side surface of the module plate member.

According to the present invention, when the one surface of the module plate member and the attached member are brought into contact with each other to be bonded and fixed, the excessively applied adhesive can be absorbed by the concave portion. Thereby, it can suppress that an adhesive agent protrudes between the one side surface of a module board member, and a to-be-attached member. Accordingly, it is possible to suppress malfunctions of the drive module due to the penetration of the adhesive between the driven body and the support, and defects in the external dimensions due to the protrusion of the adhesive to the outside of the drive module.
Further, in the present invention, since it is not necessary to provide electrodes (electrodes 9a and 9b in FIG. 10) on one side of the module plate member as in the prior art, a flat portion can be widely formed on the one side surface of the module plate member. . Therefore, in this invention, a recessed part can be easily formed in the surface of one side of a module board member, and an adhesive agent can be absorbed effectively.

  The camera module of the present invention includes the drive module described above, and a lens is held on the driven body.

  According to the present invention, it is possible to provide a high-quality camera module that is inexpensive and free from manufacturing defects such as imaging quality defects by including a drive module that can prevent relative position deviation with respect to a mounted member easily and at low cost. it can.

According to the present invention, since the connecting portion with the second holding member is formed on the metal plate member disposed on the other side of the module plate member, the connecting portion is easily accommodated within the thickness of the module plate member. It can suppress that a member protrudes from the surface of one side of a module board member. This prevents interference between the connecting member and the mounted member, so that the one surface of the module plate member and the mounted member are securely brought into contact with each other so that the drive module and the mounted member in the axial direction The position can be determined. Therefore, it is possible to prevent the displacement of the relative position between the drive module and the attached member easily and at a low cost without managing the protruding amount and spreading area of the connecting member.
Further, since the first power supply terminal portion is formed integrally with the first holding member and the second power supply terminal portion is formed integrally with the metal plate member, electrodes 9a and 9b having the terminal portion 9c as in the prior art (FIG. 10) is not necessary. Therefore, the number of parts can be reduced, and a low-cost drive module can be provided.

It is an external appearance perspective view of a drive module. It is a bottom view of a drive module. It is a disassembled perspective view of the drive module attached to the to-be-attached member. It is a disassembled perspective view of a drive module. It is sectional drawing along the AA line of FIG. It is an external appearance perspective view of an intermediate member. It is an external appearance perspective view of the drive module of the modification of embodiment. It is explanatory drawing of the mobile phone with a camera. It is explanatory drawing of an example of the drive module which changed the position of the 1st electric power feeding terminal and the 2nd electric power feeding terminal. It is a disassembled perspective view of the conventional drive module. It is sectional drawing of the conventional drive module along the XX line of FIG.

  Hereinafter, an embodiment of a drive module according to the present invention will be described with reference to the drawings. In the present embodiment, a drive module having a camera lens unit will be described as an example. An example of using an SMA wire as an example of an actuator for driving the lens unit will be described.

FIG. 1 is an external perspective view of the drive module 1.
FIG. 2 is a bottom view of the drive module 1.
FIG. 3 is an exploded perspective view of the drive module 1 attached to the adapter member 30 (attached member). In FIG. 3, the adapter member 30 and the control board 32 are represented by a two-dot chain line. For ease of viewing, the lens unit 12 (see FIG. 5) is omitted in each drawing.
In the following description, a cylindrical coordinate system of Z, R, and θ is used as necessary. Specifically, the direction along the central axis O of the drive module 1 is the Z direction, the attachment side of the drive module 1 to the adapter member 30 (see FIG. 3) is the −Z side, and the opposite side is the + Z side. The direction orthogonal to the central axis O is the R direction, the central axis O side is the -R side, and the outside of the drive module 1 is the + R side. The circumferential direction of the central axis O of the drive module 1 is the θ direction, the clockwise direction when viewed from the + Z side is the + θ side, and the counterclockwise direction is the −θ side.

  As shown in FIG. 1, the drive module 1 is formed in a box shape as a whole, and is formed in a substantially rectangular shape when viewed from the Z direction as shown in FIG. Further, as shown in FIG. 3, the drive module 1 is fixed on a control board 32 for supplying control signals and power via an adapter member 30 and is electrically connected to a printed wiring 39 to constitute a camera module. To do. An electronic device equipped with this camera module will be described later.

FIG. 4 is an exploded perspective view of the drive module 1.
As shown in FIG. 4, the drive module 1 includes a cylindrical module frame 5 (support) and a lens frame 4 (driven body) arranged coaxially with the central axis O on the −R side of the module frame 5. ), A coil spring 42 that urges the lens frame 4 to the −Z side, an SMA wire 10 (drive means) that moves the lens frame 4 to the + Z side along the Z direction against the urging force of the coil spring 42, and A wire holding member 15 (first holding member 15A and second holding member 15B) arranged along the outer peripheral surface of the module frame 5 and holding the SMA wire 10 and a cover 11 covering the module frame 5 are provided.
The drive module 1 includes a module plate member 8 disposed in the −Z direction of the module frame 5 and a lower leaf spring member 7 (metal plate member, one disposed between the module frame 5 and the module plate member 8. A side plate spring member) and an intermediate member 80 (metal plate member), and a first power supply terminal portion 9A and a second power supply terminal portion 9B protruding from the module plate member 8.

Below, each component of the drive module 1 is demonstrated.
(cover)
As shown in FIG. 1, the cover 11 is a cylindrical member made of resin or the like, and is formed so as to cover the + R side of the module frame 5 described above.
A hole 11a having a substantially circular shape in a plan view in the Z direction is provided coaxially with the central axis O at the center of the + Z side surface of the cover 11. The hole 11a is formed in a size that allows the lens unit 12 (see FIG. 5) to be inserted and removed.

(Module frame)
As shown in FIG. 4, the module frame 5 is a cylindrical member formed of, for example, polycarbonate (PC), liquid crystal polymer (LCP) resin, or the like. The module frame 5 has a generally rectangular outer shape in plan view in the Z direction, and a housing portion 5a having a substantially circular shape in plan view in the Z direction is formed coaxially with the central axis O in the center. Has been. And the lens frame 4 mentioned later is accommodated in this accommodating part 5a.

At each of the four corners of the + Z side end surface 5b and the −Z side end surface 5c of the module frame 5, four + Z side fixing pins 14a and four −Z side fixing pins 14b are provided upright along the Z direction. Further, two positioning pins 14c and two positioning pins 14d are provided upright along the Z direction at both diagonal ends of the + Z side end surface 5b and the -Z side end surface 5c of the module frame 5.
The + Z side fixing pin 14a and the + Z side positioning pin 14c hold an upper plate spring member 6 to be described later, and the −Z side fixing pin 14b and the −Z side positioning pin 14d are a lower plate spring member 7 and an intermediate member 80 to be described later. Each of the module plate members 8 is held.

  A notch 5 d having an opening on the −Z side is formed at one corner of the module frame 5. When the lens frame 4 is inserted into the module frame 5 from the −Z side and accommodated in the notch 5d, the notch 5d penetrates a guide projection 4d of the lens frame 4 described later, and the tip key portion 4e of the guide projection 4d is inserted into the module frame. 5 is projected to the + R side.

  A reference pin 34 (34a, 34b) and a detent pin 35 (35a, 35b) are formed side by side on the side surface of the module frame 5 adjacent to the notch 5d. The reference pin 34 (34a, 34b) and the rotation prevention pin 35 (35a, 35b) hold a wire holding member 15 (first holding member 15A, second holding member 15B) described later.

(Lens frame)
FIG. 5 is a cross-sectional view taken along line AA in FIG.
As shown in FIG. 4, the lens frame 4 of the present embodiment is formed in a cylindrical shape as a whole, and an accommodation portion 4 a penetrating along the central axis O is formed at the center thereof.
As shown in FIG. 5, the internal thread of the accommodating part 4a is formed with the internal thread. A lens unit 12 having a lens barrel having a male screw threadedly engaged with the female screw formed on the outer peripheral portion and a lens 50 held inside the lens barrel is fixed to the housing portion 4a.

As shown in FIG. 4, the + Z side end face 4b and the -Z side end face 4c of the lens frame 4 each have four + Z side fixing pins 13a and four -Z side fixing pins 13b at substantially equal intervals in the θ direction. And it is erected along the Z direction. The + Z side fixing pin 13a holds an upper plate spring member 6 described later, and the -Z side fixing pin 13b holds a lower plate spring member 7 described later.
A guide protrusion 4d is provided on the outer surface of the lens frame 4 so as to protrude toward the + R side at a position corresponding to the notch 5d of the module frame 5 in the θ direction. An SMA wire 10 described later is locked to the distal end key portion 4e of the guide protrusion 4d (see FIG. 3).

(SMA wire and coil spring)
As shown in FIG. 3, the SMA wire 10 has the intermediate portion locked to the distal end key portion 4e of the guide projection 4d, and both end portions thereof via a first holding member 15A and a second holding member 15B described later. The module frame 5 is fixed so as to face each other with the central axis O therebetween.
The SMA wire 10 is contracted by Joule heat generated by supplying power, and the generated tension is applied to the guide projection 4d, thereby driving the lens frame 4 to the + Z side against the urging force of the coil spring 42. .
When the power supply to the SMA wire 10 is stopped, the coil spring 42 drives the lens frame 4 to the −Z side by an urging force. Note that the movement of the lens frame 4 to the −Z side is restricted by a module plate member 8 described later.

(Wire holding member)
As shown in FIG. 3, a pair of wire holding members 15 (first holding member 15 </ b> A and second holding member 15 </ b> B) are arranged along the outer peripheral surface of the module frame 5. In the present embodiment, the first holding member 15A is disposed on the side surface adjacent to the + θ side of the cutout 5d of the module frame 5, and the second holding is provided on the side surface adjacent to the −θ side of the cutout 5d of the module frame 5. A member 15B is arranged.
In the following, after describing the common parts of the first holding member 15A and the second holding member 15B, the specific parts of the first holding member 15A and the second holding member 15B will be described.

As shown in FIG. 4, the wire holding member 15 is formed of a metal plate or the like. The wire holding member 15 is formed with a reference hole 36 (36a, 36b) that fits with the reference pin 34 of the module frame 5 and an anti-rotation hole 37 (37a, 37b) that fits with the anti-rotation pin 35. After the reference pin 34 is inserted into the reference hole 36 and the anti-rotation pin 35 is inserted into the anti-rotation hole 37, the wire holding member 15 is deformed by heat caulking the tip of the reference pin 34 and the anti-rotation pin 35. Is retained.
Further, a wire holding portion 15c for holding the SMA wire 10 is formed on the + Z side of the wire holding member 15, and the end portion of the SMA wire 10 is held by caulking the wire holding portion 15c into a key shape. Yes.

(First holding member and first feeding terminal portion)
On the −Z side of the first holding member 15 </ b> A, a first power supply terminal portion 9 </ b> A having a substantially rectangular shape in front view and extending in the −Z side along the Z direction is integrally formed. 9 A of 1st electric power feeding terminal parts protrude from the module side reference surface 8b of the module board member 8 mentioned later, and when the drive module 1 is fixed on the control board 32 (refer FIG. 3), the printing of the control board 32 is carried out. It is electrically connected to the wiring 39 (see FIG. 3). By fixing the drive module 1 to the control board 32 in this manner, an SMA is supplied from an unillustrated external power source via the printed wiring 39 (see FIG. 3), the first power supply terminal portion 9A, and the first holding member 15A. Power can be supplied to the wire 10.

(Second holding member)
A connection terminal portion 15b is integrally formed on the −Z side of the second holding member 15B and protrudes on the −Z side along the Z direction. The connection terminal portion 15b is formed in such a length that the tip of the connection terminal portion 15b is located between the + Z side surface 8a of the module plate member 8 and the module side reference surface 8b. The connection terminal portion 15b is electrically connected by an intermediate member 80 and a connection member 72 (see FIG. 5) described later.

(Upper leaf spring member and lower leaf spring member)
As shown in FIG. 4, an upper leaf spring member 6 is stacked on the + Z side of the module frame 5 and the lens frame 4 inserted into the module frame 5, and a lower leaf spring member 7 (one side leaf spring) is placed on the -Z side. Members) are laminated. Since the upper plate spring member 6 and the lower plate spring member 7 have substantially the same shape, the lower plate spring member 7 will be described below, and the description of the upper plate spring member 6 will be omitted.
The lower leaf spring member 7 is a substantially ring-shaped member made of a metal plate such as a stainless steel plate. The lower leaf spring member 7 has an outer shape in a plan view in the Z direction that is substantially rectangular, similar to the −Z side end of the module frame 5. A substantially circular hole 7 c that is coaxial with the central axis O and slightly larger than the accommodating portion 4 a of the lens frame 4 is formed at the center of the lower leaf spring member 7.

The lower leaf spring member 7 is formed with a through hole 7b corresponding to the position of the -Z side fixing pin 14b formed in the module frame 5, and the lower end of the -Z side fixing pin 14b is squeezed to The leaf spring member 7 is fixed to the module frame 5.
Further, a ring portion 7f is formed on the + R side of the hole portion 7c, and four holes extending in a substantially semicircular arc shape in the θ direction from positions in the vicinity of the through holes 7a that face each other diagonally across the central axis O. Each of the slits 7d is formed in a state in which approximately two quadrants are arranged in the R direction. Then, the four spring portions 7e extending in a substantially quadrant arc shape from the rectangular frame body 7g that forms the outer shape of the lower leaf spring member 7 are between two slits 7d arranged in the R direction. Are formed between the through holes 7a adjacent to each other in the θ direction.

(Intermediate member and second feed terminal)
As shown in FIG. 4, the intermediate member 80 is a substantially ring-shaped member made of a metal plate such as a stainless steel plate. The intermediate member 80 is disposed so as to cover a part of the + Z side surface 8a of the module plate member 8 between the lower leaf spring member 7 disposed on the −Z side of the lens frame 4 and the module plate member 8 described later. Has been.
Further, the hardness of the intermediate member 80 is formed so as to be closer to the hardness of the lower leaf spring member 7 than the hardness of the module plate member 8. In the present embodiment, the module plate member 8 is formed of a resin material, whereas the intermediate member 80 and the lower plate spring member 7 are both formed of a metal material such as stainless steel.

FIG. 6 is an external perspective view of the intermediate member 80.
The intermediate member 80 includes a ring portion 81 and a plurality of protruding portions that protrude from the outer periphery of the ring portion 81 to the + R side. The overhang portion is provided with a through hole 84 into which the -Z side fixing pin 14b of the module frame 5 is inserted, and a positioning hole 85 into which the positioning pin 14d is inserted.

  The inner diameter of the ring portion 81 of the intermediate member 80 is formed to be equal to the inner diameter of the hole 7c (see FIG. 4) of the lower leaf spring member 7. Further, the outer diameter of the ring portion 81 of the intermediate member 80 is formed larger than the outer diameter of the spring portion 7 e of the lower leaf spring member 7. As a result, when the -Z side impact force acts on the drive module 1 and the spring portion 7e of the lower leaf spring member 7 is displaced to the -Z side, the spring portion 7e is caused to collide with the + Z side surface 80a of the intermediate member 80. Can do. Therefore, the spring portion 7e can be prevented from directly colliding with the module plate member 8, and damage to the module plate member 8 can be prevented.

  As shown in FIG. 6, the second power supply terminal portion 9 </ b> B is integrally formed with the intermediate member 80 and is erected on the −Z side along the Z direction. In the present embodiment, the second power supply terminal portion 9B is formed substantially parallel to the first power supply terminal portion 9A on the + R side of the ring portion 81 and on the −θ side of the first power supply terminal portion 9A (see FIG. 4). ing. Similar to the first power supply terminal portion 9A, the second power supply terminal portion 9B protrudes from a module side reference surface 8b of the module plate member 8 described later, and the drive module 1 is placed on the control board 32 (see FIG. 3). When fixed, it is electrically connected to the printed wiring 39 (see FIG. 3) of the control board 32.

Further, on the + R side of the ring portion 81 of the intermediate member 80, a connection end face 83 is formed at a position corresponding to the connection terminal portion 15b (see FIG. 4) of the second holding member 15B. The connection end surface 83 is linearly formed in the Z direction view along the −R side surface 15d (see FIG. 2) of the connection terminal portion 15b.
As illustrated in FIG. 5, the connection terminal portion 15 b of the second holding member 15 </ b> B is disposed on the + R side of the connection end surface 83. Between the intermediate member 80 and the connection terminal portion 15b, a connection portion 70 is formed that electrically connects the intermediate member 80 and the connection terminal portion 15b. Specifically, a connection member 72 such as solder or conductive adhesive is disposed between the −Z side surface 80b of the intermediate member 80 and the −R side surface 15d of the connection terminal portion 15b, so that the intermediate member 80 and the second holding member The member 15B is electrically connected. By forming the connection portion 70 in this way, an SMA wire is connected from an external power source (not shown) via the printed wiring 39 (see FIG. 3), the second power supply terminal portion 9B, the intermediate member 80, and the second holding member 15B. 10 can be fed.

  Here, the intermediate member 80 is disposed on the + Z side of the module plate member 8 described later. For this reason, the connecting member 72 is disposed on the + Z side with respect to the module side reference surface 8b of the module plate member 8, and the connecting portion 70 is formed on the + Z side with respect to the module side reference surface 8b of the module plate member 8. Therefore, the connecting portion 70 is easily accommodated within the thickness of the module plate member 8.

(Module plate member)
As shown in FIG. 4, the module plate member 8 is formed in a flat plate shape from a resin material having electrical insulation properties, light shielding properties, and high heat resistance. The outer shape of the module plate member 8 is formed in a substantially rectangular shape like the module frame 5. In the center of the module plate member 8, a hole 88 having a size that allows the lens unit 12 to be taken in and out is provided.

  On the + Z side surface 8 a of the module plate member 8, a depressed portion 89 that is recessed toward the −Z side is formed, and an intermediate member 80 (see FIG. 4) is disposed in the depressed portion 89. Further, the lower plate spring member 7 is disposed on the + Z side of the module plate member 8 and the intermediate member 80 in a state of being in contact with the + Z side surface 8 a of the module plate member 8. The lower leaf spring member 7 and the intermediate member 80 are sandwiched and held between the module plate member 8 and the module frame 5.

  As shown in FIG. 2, the module-side reference surface 8b of the module plate member 8 is formed flat except for a recess 86 described later. As shown in FIG. 3, the relative position in the Z direction between the drive module 1 and the adapter member 30 is determined by contacting the adapter member 30. An adhesive is used to fix the drive module 1 and the adapter member 30, and the drive module 1 and the adapter member 30 are fixed by applying and curing the adhesive between the module plate member 8 and the adapter member 30. Bonded and fixed.

  Further, as shown in FIG. 2, a recess 86 that is recessed toward the + Z side is formed on the module side reference surface 8 b of the module plate member 8. The concave portions 86 of the present embodiment are formed at four locations along the four sides of the module plate member 8 on the + R side from the hole 88 of the module plate member 8. When the drive module 1 and the adapter member 30 are brought into contact with each other and bonded and fixed, the excessively applied adhesive is captured in the recess 86 and absorbed. This suppresses the adhesive from protruding in the R direction of the module plate member 8. Therefore, it is possible to suppress malfunctions of the drive module 1 due to the penetration of the adhesive between the lens frame 4 and the module frame 5, and external dimensions defects due to the adhesive protruding to the + R side of the drive module 1.

Further, the module plate member 8 has an opening 45 at a position corresponding to the connection portion 70. The opening 45 is formed so as to communicate the + Z side surface 8a (see FIG. 5) of the module plate member 8 with the module side reference surface 8b. In the present embodiment, a notch is provided at a position corresponding to the connection portion 70 of the module plate member 8, and the opening 45 is formed in a region surrounded by the notch and the side wall 11 b of the cover 11. Note that the opening 45 may be formed by forming a through hole at a position corresponding to the connection portion 70 of the module plate member 8.
The inner side surface of the opening 45 regulates the expansion area of the connection member 72 when the connection member 72 is formed between the intermediate member 80 and the connection terminal portion 15b to form the connection portion 70. In particular, since the module plate member 8 of the present embodiment is formed of a resin material having high heat resistance, the expansion region of the connection member 72 can be regulated without melting the inner surface of the opening 45.

By the way, generally in the area | region which arrange | positions the connection member 72, in order to improve adhesiveness, a gold plating process is performed. In the prior art, since it was difficult to accurately manage the spreading region of the connecting member 72 in the R direction and the θ direction, the gold plating process was performed over a wide range of the electrodes 9a and 9b.
However, in the present embodiment, since the expansion region of the connection member 72 is restricted by the inner surface of the opening 45 as described above, the region F corresponding to the opening 45 on the −Z side surface 80b of the intermediate member 80 (FIG. 2). It is sufficient to perform the gold plating only on the hatched area. In other words, it is only necessary to perform the gold plating process only on the region F used for the connection between the intermediate member 80 and the connection terminal portion 15b. Thereby, compared with the prior art, the area of the gold plating process can be reduced, so that the gold plating process can be performed at a low cost.

(effect)
According to this embodiment, the connection part 70 with the second holding member 15 </ b> B is formed on the intermediate member 80 arranged on the + Z side of the module plate member 8. For this reason, it becomes easy for the connecting portion 70 to be accommodated within the thickness of the module plate member 8, and the connection member 72 can be prevented from protruding from the −Z side surface of the module plate member 8. Accordingly, interference between the connection member 72 and the adapter member 30 can be prevented, so that the one side surface of the module plate member and the other side surface of the mounted member are reliably brought into contact with each other, so that the drive module and the mounted member are Relative position in the axial direction can be determined. Therefore, it is possible to prevent the displacement of the relative position between the drive module and the attached member easily and at a low cost without managing the protruding amount and spreading area of the connecting member.
Further, since the first power supply terminal portion 9A is integrally formed with the first holding member 15A and the second power supply terminal portion 9B is integrally formed with the intermediate member 80, the electrodes 9a having the terminal portions 9c as in the prior art, There is no need to provide 9b (see FIG. 10). Therefore, the number of parts can be reduced, and a low-cost drive module can be provided.

  Moreover, according to this embodiment, since the intermediate member 80 arranged for the purpose of protecting the module plate member 8 is used as the metal plate member, it is not necessary to add a new metal plate member. Therefore, the manufacturing cost of the drive module 1 can be suppressed.

Further, according to the present embodiment, when the module side reference surface 8b of the module plate member 8 and the adapter member 30 are brought into contact with each other and bonded and fixed, the excessively applied adhesive can be absorbed by the recess 86. Thereby, it can suppress that an adhesive agent protrudes between the module side reference surface 8b of the module board member 8, and the adapter member 30. FIG. Therefore, it is possible to suppress malfunctions of the drive module 1 due to the penetration of the adhesive between the lens frame 4 and the module frame 5, and external dimensions defects due to the adhesive protruding to the outside of the drive module 1.
Further, according to the present embodiment, it is not necessary to provide the electrodes 9a and 9b (see FIG. 10) on the −Z side of the module plate member 8 as in the prior art, so that the module side reference surface 8b of the module plate member 8 is provided. A flat part can be formed widely. Therefore, the recess 86 can be easily formed on the module side reference surface 8b of the module plate member 8, and the adhesive can be effectively absorbed.

Further, the pair of electrodes 9 a and 9 b (see FIG. 10) in the prior art is disposed on the −Z side of the module plate member (lower plate) 8. Therefore, as shown in FIG. 11, in order to arrange the pair of electrodes 9a, 9b on the + Z side of the module side reference surface 8b on the −Z side surface of the module plate member 8, a pair of electrodes 9a, It was necessary to form a depressed portion 90 that was depressed on the + Z side at a position corresponding to 9b. Thereby, the thickness of the module plate member 8 in the depressed portion 90 is formed thin. Furthermore, a through-hole (not shown) was formed in the thin portion where the resin did not flow easily during injection molding. Therefore, the strength of the module plate member 8 may be reduced.
However, in the present embodiment, the first power supply terminal portion 9A is integrally formed on the −Z side of the first holding member 15A (see FIG. 3). Further, the second power supply terminal portion 9B is integrally formed on the intermediate member 80 disposed on the + Z side of the module plate member 8 (see FIG. 6). This eliminates the need for the electrodes 9a and 9b having the terminal portions 9c in the prior art, so that there is no need to form the recessed portions 90 on the module side reference surface 8b of the module plate member 8. Therefore, a sufficient thickness of the module plate member 8 can be ensured, and the strength of the module plate member 8 is improved as compared with the prior art.

Further, in the prior art, an adhesive for fixing the module plate member 8 and the adapter member 30 enters between the lens frame 4 and the module frame 5 from the through hole around the depressed portion 90, and the operation of the drive module 1. There was a risk of failure.
However, in the present embodiment, the depressed portion 90 is not formed, and the through hole considering the resin flow at the time of injection molding is not formed, so that it is possible to prevent malfunction of the drive module 1 due to the penetration of the adhesive.

Further, in the prior art, the area where the module side reference surface 8b of the module plate member 8 and the adapter member 30 (see FIG. 3) abut due to the recessed portion 90 is narrowed, so that the drive module 1 and the adapter member 30 are positioned. There was a possibility that it could not be performed stably.
However, in this embodiment, since the depression 90 is not formed and a flat portion can be secured widely on the module side reference surface 8b of the module plate member 8, the adapter member 30 (FIG. 3) is provided on the module side reference surface 8b of the module plate member 8. A sufficient area can be secured. Thereby, positioning with respect to the drive module 1 and the adapter member 30 (refer FIG. 3) can be performed stably. Further, since it is not necessary to form the depressed portion 90, the shape of the module plate member 8 can be simplified, and the mold for molding the module plate member 8 can be easily manufactured.

(Modification of the embodiment, forming the second power supply terminal on the lower leaf spring member)
FIG. 7 is an explanatory view of a modified example of the embodiment, and is an external perspective view of the drive module 1 in which the second power supply terminal portion 9B is formed on the lower leaf spring member 7. In FIG. 7, illustration of the cover 11, the intermediate member 80, and the module plate member 8 is omitted for easy understanding.
In the above-described embodiment, the second power supply terminal portion 9B is integrally formed with the intermediate member 80, and the connection portion 70 is provided between the second holding member 15B and the intermediate member 80 (see FIG. 2). On the other hand, in this modification, the second power supply terminal portion 9B is integrally formed with the lower leaf spring member 7, and the connection portion 70 is provided between the second holding member 15B and the lower leaf spring member 7. This is different from the drive module 1 of the embodiment. In addition, description is abbreviate | omitted about the component similar to embodiment.

  As shown in FIG. 7, the second power supply terminal portion 9 </ b> B is integrally formed with the lower leaf spring member 7 and is erected on the −Z side along the Z direction. In the present modification, the second power supply terminal portion 9B is substantially parallel to the first power supply terminal portion 9A on the −R side of the first power supply terminal portion 9A on the + R side of the rectangular frame 7g of the lower leaf spring member 7. Is formed.

  Further, the connection terminal portion 15b of the second holding member 15B is disposed on the + R side of the rectangular frame 7g of the lower leaf spring member 7. A connection member 72 is disposed between the −Z side surface of the lower leaf spring member 7 and the −R side surface 15d of the connection terminal portion 15b, and the lower leaf spring member 7 and the second holding member 15B are electrically connected. Has been. By forming the connection portion 70 in this manner, from an external power source (not shown), via the printed wiring 39 (see FIG. 3), the second power supply terminal portion 9B, the lower leaf spring member 7 and the second holding member 15B, Electric power can be supplied to the SMA wire 10.

(Effect of modification)
According to the present modification, in addition to the effects of the present embodiment, the lower plate spring member 7 provided for the purpose of elastically holding the lens frame 4 is used as the metal plate member, so it is necessary to add a new metal plate member There is no. Therefore, the manufacturing cost of the drive module 1 can be suppressed.

(Camera mobile phone)
Next, an embodiment of a camera module provided with the drive module 1 according to the present embodiment will be described. In this embodiment, a camera-equipped mobile phone provided with a camera module will be described as an example.

  FIG. 8 is an explanatory diagram of the camera-equipped mobile phone 20. FIG. 8A is an external perspective view of the front side of the camera-equipped mobile phone 20. FIG. 8B is an external perspective view of the back side of the camera-equipped mobile phone 20. FIG. 8C is a cross-sectional view taken along line FF in FIG. As shown in FIG. 8A, the camera-equipped mobile phone 20 according to the present embodiment includes a receiving unit 22a, a transmitting unit 22b, an operation unit 22c, a liquid crystal display unit 22d, an antenna unit 22e, and an unillustrated unit. And an electronic part of a well-known mobile phone such as a control circuit part of the telephone cover 22.

As shown in FIG. 8B, the telephone cover 22 on the back surface side on which the liquid crystal display unit 22d is provided is provided with a window 22A that transmits external light.
Then, as shown in FIG. 8 (c), the hole 11a of the cover 11 of the drive module 1 faces the window 22A of the telephone cover 22, and the drive module so that the central axis O is along the normal direction of the window 22A. 1 is installed. The drive module 1 is mechanically attached to the control board 32 via the adapter member 30. The drive module 1 is electrically connected to the control board 32 so that power can be supplied to the drive module 1.

  With this configuration, the light transmitted through the window 22A can be collected by the lens unit 12 (see FIG. 5) of the drive module 1 and imaged on the image sensor 40. Then, by appropriately supplying power to the drive module 1 from the control circuit unit, the lens unit 12 can be driven along the central axis O, and the focal position can be adjusted to perform photographing.

(effect)
According to this embodiment, by providing the drive module 1 that can prevent the displacement of the relative position with respect to the adapter member 30 easily and at low cost, it is possible to obtain a high-quality camera module that is inexpensive and free from imaging defects and the like. be able to. As a result, an inexpensive and high-quality camera-equipped mobile phone 20 can be provided.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the present embodiment, the SMA wire 10 is used to drive the lens frame 4 along the central axis O. However, the present invention is not limited to this, and a lens can be obtained by using a VCM, a piezoelectric actuator, or the like as an actuator. The frame 4 may be driven.

  In the present embodiment, the module frame 5 is a substantially rectangular member as a whole, but is not limited to a substantially rectangular shape, and may be a polygonal shape.

  In the present embodiment, the intermediate member 80 or the lower leaf spring member 7 and the second holding member 15B are electrically connected by the connecting member 72 such as solder or conductive adhesive. However, the intermediate member 80 or the lower leaf spring member 7 and the second holding member 15B may be electrically connected by welding, for example.

In the present embodiment, the wire holding member 15 is formed separately from the module frame 5. However, for example, the wire holding member 15 and the module frame 5 may be integrally formed by insert-molding the wire holding member 15 in the module frame 5.
In the present embodiment, the intermediate member 80 is formed separately from the module plate member 8. However, for example, the module plate member 8 and the intermediate member 80 may be integrally formed by insert-molding the intermediate member 80 in the module plate member 8.

  In the present embodiment, an example of the camera-equipped mobile phone 20 has been described as an embodiment of the camera module including the drive module 1. However, application of the camera module is not limited to the camera-equipped mobile phone 20. For example, the present invention may be used for an optical device such as a digital camera or a camera built in a personal computer.

The formation positions of the first feeding terminal portion 9A and the second feeding terminal portion 9B are not limited to the present embodiment.
FIG. 9 is an explanatory diagram of an example of the drive module 1 in which the positions of the first power supply terminal portion 9A and the second power supply terminal portion 9B are changed. In FIG. 9, the cover 11 is not shown for easy understanding.
In the present embodiment, the first feeding terminal portion 9A is formed on the −Z side of the first holding member 15A, and the second feeding terminal portion 9B is formed adjacent to the −θ side of the first feeding terminal portion 9A. .
On the other hand, for example, as shown in FIG. 9, the first power supply terminal portion 9 </ b> A is separated from the first holding member 15 </ b> A to the −θ side by being drawn along the side surface of the module frame 5 to the −θ side. The first power supply terminal portion 9A can be formed at the position.
The second power supply terminal portion 9B can be formed at an arbitrary position on the + R side of the ring portion 81 of the intermediate member 80. Therefore, as shown in FIG. 9, the second power supply terminal portion 9B can be formed substantially parallel to the first power supply terminal portion 9A on the −θ side from the present embodiment.
As described above, the first power supply terminal portion 9A and the second power supply terminal portion 9B can be formed at positions different from those of the embodiment.

DESCRIPTION OF SYMBOLS 1 ... Drive module 4 ... Lens frame (driven body) 4d ... Guide protrusion 5 ... Module frame (support body) 7 ... Lower leaf spring member (metal plate member, one side leaf spring member) 8 ... Module plate member 9A ... 1st feeding terminal part 9B ... 2nd feeding terminal part 10 ... Shape memory alloy wire (driving means) 15A ... 1st holding member 15B ... Second holding member 20 ... Mobile phone with camera (camera module) 30 ... Adapter member 45 ... Opening 50 ... Lens 70 ... Connection part 72 ... Connection member 80 ... Intermediate Member (metal plate member, one side leaf spring member) 86... Recessed portion O... Central axis

Claims (8)

A tubular support;
A driven body disposed coaxially with the central axis of the support inside the support;
Driving means for reciprocating the driven body along the axial direction of the support;
A first holding member and a second holding member, which are disposed along an outer peripheral surface of the support body, hold the driving means, and are electrically connected to the driving means to supply power to the driving means;
A module plate member disposed on one side of the support in the axial direction;
At least one metal plate member disposed between the support and the module plate member in the axial direction;
A first power supply terminal portion that protrudes from the one side of the module plate member and enables power supply from the outside to the first holding member;
A second power supply terminal portion that protrudes from the one side of the module plate member and enables power supply from the outside to the second holding member;
With
The one side surface of the module plate member is a drive module attached to a member to be attached,
The first feeding terminal portion is integrally formed with the first holding member, the second feeding terminal portion is integrally formed with the metal plate member, and the metal plate member and the second holding member are electrically connected by a connecting member. The drive module characterized by the above-mentioned. The connection part connected to is provided. The drive module according to claim 1,
The drive means has a shape memory alloy wire that contracts when supplied with power,
The first holding member holds one end of the shape memory alloy wire,
The second holding member holds the other end of the shape memory alloy wire,
The driven body includes a guide protrusion protruding outside the support,
The drive module, wherein the shape memory alloy wire is engaged with the guide protrusion. The drive module according to claim 1 or 2,
The drive module according to claim 1, wherein the metal plate member is an intermediate member that covers the other surface of the module plate member and protects the module plate member. The drive module according to claim 1 or 2,
The drive module, wherein the metal plate member is a one-side plate spring member that is connected to the one side of the support and elastically holds the driven body. The drive module according to any one of claims 1 to 4, wherein
The drive module according to claim 1, wherein an opening that communicates the one side surface and the other side surface of the module plate member is formed at a position corresponding to the connection portion in the module plate member. The drive module according to claim 5,
The drive module, wherein the metal plate member is gold-plated only in a region corresponding to the opening. The drive module according to any one of claims 1 to 6,
A drive module, wherein a concave portion is formed on the one side surface of the module plate member.   A camera module comprising the drive module according to claim 1, wherein a lens is held on the driven body.

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