JP2013020237A - Driving module assembly and camera module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving module assembly which allows a driving module and an adapter member to be easily fixed and is capable of preventing the occurrence of manufacturing defects such as dimensional defects, operation defects, and poor imaging quality, and to provide a camera module including the driving module assembly.SOLUTION: A driving module 2 has at least a pair of first engagement parts 87b formed so as to face each other with a center axis O therebetween, and second engagement parts 25 are formed in positions corresponding to the first engagement parts 87b, on an edge surface 29 of an adapter member 30, and the first engagement parts 87b and the second engagement parts 25 are engaged with each other with a module side reference surface 90 and an adapter side reference surface 27 in contact with each other, whereby the driving module 2 and the adapter member 30 are fixed.

Description

  The present invention relates to a drive module assembly and a camera module.

  2. Description of the Related Art Conventionally, various drive modules have been proposed that use a shape memory alloy wire to expand and contract to drive a driven body such as an imaging lens unit in a small electronic device such as a mobile phone with a camera function. Yes.

As this type of drive module, for example, as shown in Patent Document 1, a driven body to which a lens is attached, a cylindrical support that accommodates the driven body movably along a fixed direction, and A plate member (module plate member) disposed at the cylindrical end portion on one side of the support body and a spring member for applying an urging force along a certain direction to the driven body.
A shape memory alloy wire is stretched around the outer peripheral portion of the support, and Joule heat is generated by passing an electric current through the shape memory alloy wire. The shape memory alloy wire is contracted by this heat generation, and the lens unit is lifted against the urging force of the spring member and moved in the axial direction of the support.

  By the way, after the drive module is delivered to the manufacturer of the electronic device, it is attached to the control board, and the control board to which the drive module is attached is mounted on the electronic device. The control board to which the drive module is attached is provided with an imaging element that forms an image of light collected by the lens, wiring for supplying power, and the like. Here, the specifications of the lens and the image sensor differ depending on the electronic device on which the drive module is mounted. In order to cope with the difference in specifications of the lens and the image sensor, an adapter member is generally provided between the drive module and the control board.

FIG. 14 is an exploded perspective view of the drive module assembly 1 including the drive module 2 and the adapter member 30 according to the prior art.
The direction along the central axis O of the drive module assembly 1 is the Z direction, the attachment side (lower side in FIG. 14) of the drive module assembly 1 to the control board 32 is the −Z side, and the opposite side (FIG. 14). The upper side in FIG. 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 2 is the + R side.

As shown in FIG. 14, the drive module assembly 1 includes a drive module 2 and an adapter member 30 disposed on the −Z side of the drive module 2. The drive module 2 also includes a cover 11 that covers the outside of the driven body 4 and the support body 5.
The adapter member 30 is a box-shaped member having a predetermined thickness, and an opening having a predetermined shape is formed at a position corresponding to an imaging element (not shown).
The drive module 2 and the adapter member 30 correspond to the module side reference surface 90 formed on the −Z side surface of the drive module 2 and the adapter side reference surface 27 formed on the + Z side surface of the adapter member 30. The relative position is determined by contact.

Further, by changing the thickness of the adapter member 30 in the Z direction, the distance between the lens (not shown) on the drive module 2 side and the image pickup device of the control board 32 can be changed, and the focal position due to the difference in lens specifications Can handle differences. Moreover, the irradiation range of light can be changed by changing the opening shape of the adapter member 30, and it can respond to the specification difference of an image pick-up element.
As described above, by providing the adapter member 30 corresponding to the imaging element and the lens between the drive module 2 and the control board 32, the specification difference of the imaging element and the lens is dealt with.

  Generally, an adhesive is used for fixing the drive module 2 and the adapter member 30. Specifically, the drive module 2 and the adapter member 30 are bonded and fixed by pouring an adhesive between the −Z side end surface 11c of the cover 11 and the + Z side surface of the adapter member 30 and curing the adhesive. ing.

JP 2009-128708 A

However, the fixing of the adapter member 30 and the drive module 2 with the adhesive described above has the following problems.
It is necessary to fix the relative position of the drive module 2 and the adapter member 30 with a jig or the like after the adhesive is poured from the + R side of the drive module 2 until the adhesive is cured. Therefore, when fixing the drive module 2 and the adapter member 30 only with an adhesive agent, there exists a possibility that a process may become complicated.

In addition, the adhesive poured between the drive module 2 and the adapter member 30 may protrude to the + R side and the −R side of the cover 11 before curing.
When the adhesive protruding to the + R side of the cover 11 is cured, there is a step on the outer surface of the drive module assembly 1, and there is a possibility that a dimensional defect of the drive module assembly 1 occurs.
When the adhesive protruding to the −R side of the cover 11 spreads to the + Z side surface of the adapter member 30 and enters between the module side reference surface 90 and the adapter side reference surface 27, the drive module 2 and the adapter member 30 are relative to each other. There is a risk of being fixed in a tilted state. As a result, the focal position shifts, and there is a risk of poor imaging quality. Further, when the adhesive protruding from the −R side of the cover 11 enters between the driven body 4 and the support body 5, smooth movement of the driven body 4 with respect to the support body 5 is hindered, and the operation of the drive module 2. May cause defects. In particular, when the adhesive is of an ultraviolet curable type, the adhesive that protrudes to the −R side of the cover 11 cannot be cured and may enter deep inside the driven body 4.

  Accordingly, the present invention provides a drive module assembly that can easily fix the drive module and the adapter member and can prevent production defects such as defective dimensions, poor operation, and poor imaging quality, and a camera module including the drive module assembly. The issue is to provide

  In order to solve the above-described problems, a drive module assembly according to the present invention includes a cylindrical support, and a driven body disposed inside the support so as to reciprocate along the axial direction of the support. A drive module assembly, and an adapter member disposed coaxially with a central axis of the support on one side in the axial direction of the drive module, wherein the drive A module-side reference surface that determines a relative position of the drive module and the adapter member in the axial direction is formed on the surface on the one side of the module, and a surface on the other side of the adapter member in the axial direction is formed on the surface on the other side. The adapter side reference surface that determines the relative position in the axial direction between the drive module and the adapter member is formed by contacting the module side reference surface. The drive module is formed with at least one pair of first engaging portions opposed to each other across the central axis, and the adapter member has a portion different from the adapter-side reference surface at the first engagement portion. A second engagement portion is formed at a position corresponding to the joint portion, and the first engagement portion and the second engagement portion are engaged while the module side reference surface and the adapter side reference surface are brought into contact with each other. By being combined, the drive module and the adapter member are fixed.

According to the present invention, it is possible to easily fix the drive module and the adapter member simply by engaging the first engagement portion and the second engagement portion.
The relative position between the drive module and the adapter member is determined by engaging the first engagement portion and the second engagement portion while bringing the module side reference surface and the adapter side reference surface into contact with each other. Since the drive module and the adapter member can be fixed, it is possible to prevent imaging quality defects of the drive module assembly.
Moreover, according to this invention, a drive module and an adapter member can be fixed without using an adhesive agent. Therefore, dimensional defects due to adhesion of the adhesive to the outer surface of the drive module, imaging quality defects due to penetration of the adhesive between the module side reference surface and the adapter side reference surface, and between the driven body and the support body It is possible to prevent manufacturing defects such as operation failures due to the penetration of the adhesive into the adhesive.

  Further, the other side surface of the adapter member has an edge surface arranged on the one side with respect to the adapter side reference surface, and the second engaging portion is formed on the edge surface. It is characterized by that.

  According to the present invention, since the second engagement portion is formed on the edge surface arranged on one side of the adapter side reference surface around the adapter side reference surface, the first engagement portion and the second engagement are formed. When engaging the portion, the module side reference surface and the adapter side reference surface can be reliably brought into contact with each other. Thereby, since the drive module and the adapter member can be fixed in a state where the relative position between the drive module and the adapter member is accurately determined, it is possible to suppress the deviation of the focal position and to surely prevent the imaging quality defect.

  The drive module includes a module plate member fixed to the support body and covering the one side of the support body, and the module side reference surface is formed on the one side surface of the module plate member, The first engaging portion is characterized in that it is erected along the axial direction from the periphery of the module side reference surface of the module plate member.

  According to the present invention, the module-side reference surface and the first engaging portion are formed on the module plate member that is a component of the drive module, so that the relative positional accuracy between the module-side reference surface and the first engaging portion is improved. It can be secured and formed. Moreover, since the adapter side reference surface and the second engagement portion are formed on the adapter member, the adapter side reference surface and the second engagement portion can be formed with good relative positional accuracy. Therefore, the first engagement portion and the second engagement portion can be reliably engaged in a state where the module side reference surface and the adapter side reference surface are in contact with each other.

  The first engaging portion is provided on a standing wall that is erected along the axial direction from the periphery of the module-side reference surface, and an adhesive is provided in a gap between the tip of the standing wall and the edge surface. It is characterized by being filled.

According to the present invention, the drive module and the adapter member can be firmly fixed by filling the gap between the tip of the standing wall and the edge surface with the adhesive. Furthermore, since the first engaging portion and the second engaging portion are engaged, the drive module and the adapter member need not be fixed with a jig until the adhesive is cured. Therefore, the drive module and the adapter member can be easily fixed with an adhesive.
Further, the other side surface of the adapter member is formed in a stepped shape by the adapter side reference surface and an edge surface formed on one side of the adapter side reference surface, so that the tip of the standing wall and the edge surface The adhesive filled in the gap can be prevented from entering between the module side reference surface and the adapter side reference surface. As a result, the module-side reference surface and the adapter-side reference surface can be reliably brought into contact with each other and the relative position can be determined, so that the deviation of the focal position can be suppressed and imaging quality defects can be reliably prevented. Moreover, since it can suppress that an adhesive agent permeates between a to-be-driven body and a support body, the malfunctioning of a drive module can be prevented.

  Further, the first engaging portion is a fixing pin that is erected along the axial direction from the one side surface of the support body, and the second engaging portion is an insertion through which the fixing pin is inserted. The fixing pin protrudes outward from the distal end portion of the fixing pin so as to have a diameter larger than the diameter of the insertion hole and engages with the opening peripheral edge of the insertion hole, so that the fixing pin is inserted into the insertion hole. It is characterized in that an overhanging portion that restricts the removal from the hole is formed.

According to the present invention, after the fixing pin is inserted into the insertion hole by elastically deforming at least one of the distal end portion of the fixing pin and the insertion hole, the overhanging portion engages with the opening peripheral edge of the insertion hole. To do. Thereby, a 1st engaging part and a 2nd engaging part can be engaged, and a drive module and an adapter member can be fixed easily. In particular, since the drive module and the adapter member can be fixed by a simple method in which the fixing pin is engaged with the insertion hole, the assembly work of the drive module assembly can be made more efficient.
Further, even after the first engaging portion and the second engaging portion are once engaged, the first engaging portion can be elastically deformed by elastically deforming at least one of the distal end portion of the fixing pin and the insertion hole. And the second engagement portion can be released. Thereby, for example, in the manufacturing process of the drive module assembly, even if a failure or the like occurs in a part constituting the drive module assembly or an assembly failure occurs, the first engagement portion and the second engagement portion The drive module and the adapter member can be easily disassembled by releasing the engagement with the portion. Therefore, the drive module and the adapter member can be disassembled and dealt with promptly, and it is easy to reduce waste parts.

  Further, the other surface of the adapter member has an intermediate surface disposed on the one side with respect to the adapter side reference surface, and an edge surface disposed on the one side further with respect to the intermediate surface. And the said 2nd engaging part is formed in the said intermediate surface, It is characterized by the above-mentioned.

  According to the present invention, since the second engagement portion is formed on the intermediate surface disposed on the one side of the adapter side reference surface around the adapter side reference surface, the first engagement portion and the second engagement are formed. When engaging the portion, the module side reference surface and the adapter side reference surface can be reliably brought into contact with each other. Thereby, since the drive module and the adapter member can be fixed in a state where the relative position between the drive module and the adapter member is accurately determined, it is possible to suppress the deviation of the focal position and to surely prevent the imaging quality defect.

  The drive module includes a module plate member fixed to the support body and covering the one side of the support body, and the module side reference surface is formed on the one side surface of the module plate member, The module plate member is provided with a standing wall erected along the axial direction from the periphery of the module side reference surface, and a gap between a tip of the standing wall and the edge surface is filled with an adhesive. It is a feature.

According to the present invention, the drive module and the adapter member can be firmly fixed by filling the gap between the tip of the standing wall and the edge surface with the adhesive. Furthermore, since the first engaging portion and the second engaging portion are engaged, the drive module and the adapter member need not be fixed with a jig until the adhesive is cured. Therefore, the drive module and the adapter member can be easily fixed with an adhesive.
In addition, the other surface of the adapter member is formed in a stepped manner by the adapter-side reference surface, and an intermediate surface and an edge surface formed on one side of the adapter-side reference surface. The adhesive filled in the gap with the surface can be prevented from entering between the module side reference surface and the adapter side reference surface. As a result, the module-side reference surface and the adapter-side reference surface can be reliably brought into contact with each other and the relative position can be determined, so that the deviation of the focal position can be suppressed and imaging quality defects can be reliably prevented. Moreover, since it can suppress that an adhesive agent permeates between a to-be-driven body and a support body, the malfunctioning of a drive module can be prevented.

  The fixing pin is formed with a slit that divides a tip portion into a plurality of circumferential directions of the fixing pin, and the overhang portion is formed at each of the divided tip portions. It is said.

  According to the present invention, by forming the slit at the tip of the fixing pin, the tip divided in the circumferential direction can be easily elastically deformed in the radial direction. Accordingly, the distal end portion of the fixing pin can be elastically deformed radially inward to engage and release the protruding portion and the insertion hole, so that the drive module and the adapter member can be easily assembled and disassembled. Therefore, the assembling work is further facilitated, and the drive module and the adapter member are more securely fixed.

  The insertion hole is a stepped hole having a first insertion hole and a second insertion hole having a diameter larger than that of the first insertion hole, and the projecting portion of the fixing pin is the second insertion hole. It is characterized by being engaged with the opening peripheral edge portion of the first insertion hole while being accommodated in the insertion hole.

  According to the present invention, it is possible to prevent the protruding portion of the fixing pin from protruding from the adapter member by accommodating the protruding portion of the fixing pin in the second insertion hole. Therefore, when the drive module assembly is mounted on another component such as a substrate, it is possible to prevent the protruding portion of the fixing pin from interfering with the other component.

  In addition, a camera module of the present invention includes the drive module assembly described above.

  According to the present invention, it is possible to provide an inexpensive camera module with a low manufacturing cost by including the drive module assembly that can easily fix the drive module and the adapter member. In addition, a high-quality camera module can be provided by providing a drive module assembly free from manufacturing defects such as dimensional defects, operational defects, and imaging quality defects.

According to the present invention, it is possible to easily fix the drive module and the adapter member only by engaging the first engaging portion and the second engaging portion.
The relative position between the drive module and the adapter member is determined by engaging the first engagement portion and the second engagement portion while bringing the module side reference surface and the adapter side reference surface into contact with each other. Since the drive module and the adapter member can be fixed, it is possible to prevent imaging quality defects of the drive module assembly.
Moreover, according to this invention, a drive module and an adapter member can be fixed without using an adhesive agent. Therefore, dimensional defects due to adhesion of the adhesive to the outer surface of the drive module, imaging quality defects due to penetration of the adhesive between the module side reference surface and the adapter side reference surface, and between the driven body and the support body It is possible to prevent manufacturing defects such as operation failures due to the penetration of the adhesive into the adhesive.

It is an external appearance perspective view of the camera module comprised by attaching the drive module assembly of 1st Embodiment to a control board. It is a disassembled perspective view of the drive module assembly of 1st Embodiment. It is an external appearance perspective view of the drive module of 1st Embodiment. It is a disassembled perspective view of the drive module of 1st Embodiment. It is sectional drawing along the AA line in FIG. It is a perspective view of a module board member. It is sectional drawing along the BB line in FIG. It is a perspective view of the adapter member of 1st Embodiment. It is an external appearance perspective view of the drive module of 2nd Embodiment. It is a disassembled perspective view of the drive module of 2nd Embodiment. It is sectional drawing along CC line in FIG. It is a perspective view of the adapter member of 2nd Embodiment. It is explanatory drawing of the mobile phone with a camera. It is a disassembled perspective view of the drive module assembly which consists of a drive module and an adapter member concerning a prior art.

(Drive Module Assembly of First Embodiment)
Hereinafter, the drive module assembly according to the first embodiment 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. Further, as an example of an actuator for driving the lens unit, a case where a shape memory alloy (Shape Memory Alloy, hereinafter abbreviated as SMA) wire is used will be described as an example.

FIG. 1 is an external perspective view of a camera module configured by attaching the drive module assembly 1 of the first embodiment to a control board 32.
In the following description, the central axis of the module frame 5 (support, see FIG. 2) is the central axis O of the drive module assembly 1. Also, the direction along the central axis O is the Z direction, the attachment side of the drive module assembly 1 to the control board 32 (the lower side in FIG. 1) is the −Z side, and the opposite side (the upper side in FIG. 1) is the + Z side. It is said. 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 2 is the + R side.

  As shown in FIG. 1, the drive module assembly 1 includes a drive module 2 and an adapter member 30 disposed on the −Z side of the drive module 2, and is configured in a box shape as a whole. After the assembly is completed, the drive module assembly 1 is fixed on a control board 32 that supplies control signals and electric power to the drive module 2 and is electrically connected to the printed wiring 39 to constitute a camera module. An electronic device equipped with this camera module will be described later.

(Drive module)
FIG. 2 is an exploded perspective view of the drive module assembly 1 of the first embodiment.
FIG. 3 is an external perspective view of the drive module 2 of the first embodiment when viewed from the −Z side.
FIG. 4 is an exploded perspective view of the drive module 2 of the first embodiment. In FIG. 4, the cover 11 and the coil spring 42 (see FIG. 2) are omitted for ease of viewing.
FIG. 5 is a cross-sectional view taken along line AA in FIG.
In FIGS. 2 and 3, the lens unit 12 (see FIG. 5) is omitted for easy understanding.

  As shown in FIG. 2, the drive module 2 includes a cylindrical lens frame 4 (driven body) that holds a lens unit 12 (see FIG. 5) on which a lens 50 (see FIG. 5) is mounted, and the lens frame 4. The cylindrical module frame 5 that accommodates the lens frame 4 on the −R side, and the lens frame 4 and the module frame 5 are elastically held so as to be movable along the Z direction. An upper leaf spring 6 connected to the lower plate spring 7, a lower leaf spring 7 connected to the end face on the −Z side, and a cover 11 covering the module frame 5.

  As shown in FIG. 2, the drive module 2 includes a drive unit that moves the lens frame 4 along the Z direction. As drive means, there are provided a coil spring 42 for urging the lens frame 4 to the −Z side, and an actuator for moving the lens frame 4 in the + Z direction against the urging force of the coil spring 42. As actuators, an SMA wire 10, a wire holding member 15 (15a, 15b) that fixes the SMA wire 10 to the module frame 5, and a module plate member that restricts the movement of the lens frame 4 and the lower leaf spring 7 in the -Z direction. 8 and a power supply member 9 described later for supplying power to the SMA wire 10 via the wire holding members 15a and 15b.

  As shown in FIG. 5, the lens frame 4 is inserted on the −R side of the module frame 5. The upper plate spring 6 and the lower plate spring 7 are disposed on the + Z side and the −Z side of the lens frame 4 and the module frame 5, and the lens frame 4 and the module frame 5 are connected to the + Z side and the −Z side. It is fixed by caulking in a state of being sandwiched from. The module plate member 8 and the power supply member 9 are laminated in this order from the −Z side, and are fixed to the module frame 5 by caulking, for example, from the −Z side of the module frame 5.

Subsequently, each component of the drive module 2 will be described.
(Support)
As shown in FIG. 2, the module frame 5 (support) 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.

  As shown in FIG. 4, + Z side end face 5 b and −Z side end face 5 c orthogonal to the central axis O are formed at four corners on the + Z side and the −Z side of the module frame 5. Then, four + Z side fixing pins 14a are erected on the + Z side end surface 5b toward the + Z side, and four −Z side fixing pins 14b are erected on the −Z side end surface 5c toward the −Z side. Yes. The + Z side fixing pin 14a holds an upper plate spring 6 described later, and the -Z side fixing pin 14b holds a lower plate spring 7, an intermediate member 80, a module plate member 8, and a power feeding member 9 described later.

Two positioning pins 14c are erected on both ends of one diagonal line on the + Z side end face 5b of the module frame 5 toward the + Z side. The positioning pin 14 c is inserted into the positioning hole 6 g of the upper plate spring 6 to position the upper plate spring 6.
Similarly, two positioning pins 14d are erected on the opposite ends of one diagonal line on the −Z side end face 5c of the module frame 5 toward the −Z side. The positioning pins 14d are inserted into the positioning holes of the lower leaf spring 7, the intermediate member 80, the module plate member 8, and the power feeding member 9, and perform positioning thereof.

  As shown in FIG. 2, a notch 5 d is formed in the lower part of one corner of the module frame 5. When the lens frame 4 is inserted and accommodated in the module frame 5 from the −Z side, the notch 5 d penetrates the guide projection 4 d of the lens frame 4, and the tip key portion 4 e of the guide projection 4 d is inserted into the module frame 5. While projecting to the + R side, the lens frame 4 is positioned.

(Driven body)
As shown in FIG. 4, the lens frame 4 (driven body) of the present embodiment is formed in a cylindrical shape as a whole, and a cylindrical accommodating portion 4f penetrating along the central axis O is formed at the center thereof. Is formed. As shown in FIG. 5, a female screw is formed on the inner peripheral surface of the accommodating portion 4f. 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 an appropriate lens or lens group held inside the lens barrel is fixed to the housing portion 4f. ing.

  As shown in FIG. 4, on the + R side surface of the lens frame 4, a protruding portion 4 c that protrudes toward the + R side is extended along the central axis O at an interval of about 90 degrees in the circumferential direction. On the + Z side end surface 4 a and the −Z side end surface 4 b of the lens frame 4, the + Z side end portion and the −Z side end portion of each protrusion 4 c are respectively located on the + Z side and the −Z side along the central axis O. Four protruding + Z side fixing pins 13 a and four −Z side fixing pins 13 b are provided. Among these, the + Z side fixing pin 13 a holds the upper plate spring 6, and the −Z side fixing pin 13 b holds the lower plate spring 7. As with the module frame 5, the lens frame 4 is integrally formed of a thermoplastic resin that can be caulked by heat or ultrasonically, such as polycarbonate (PC) or liquid crystal polymer (LCP) resin.

Further, a guide protrusion 4d is provided on the outer wall surface of the lens frame 4 so as to protrude to the + R side. The guide protrusion 4d is provided at a position corresponding to the notch 5d of the module frame 5 between the adjacent protrusions 4c (a position shifted by 45 degrees in the circumferential direction from the protrusion 4c).
The outer shape of the guide protrusion 4d when viewed from the Z direction is formed to be smaller than the groove width of the notch 5d of the module frame 5. As a result, the guide protrusion 4d can move in the Z direction. Further, an SMA wire 10 to be described later is locked to the tip key portion 4e of the guide protrusion 4d (see FIG. 2). When the SMA wire 10 contracts, the guide protrusion 4d is lifted to the + Z side, and the lens frame 4 is movable along the Z direction.

(Driving means)
As shown in FIG. 2, wire holding members 15 (15 a and 15 b) are fixed to two side surfaces adjacent to the notch 5 d of the module frame 5.
More specifically, on the side surface of the module frame 5 adjacent to the notch 5d, the reference pins 34 (34a, 34b) and the anti-rotation pins 35 (35a, 35b) are formed side by side. The reference pin 34 is formed in a circular shape when viewed from the front. The anti-rotation pin 35 is formed by an arc portion formed in a substantially arc shape on the + Z side and the −Z side in a front view, and a linear portion connecting ends of both arc portions.

  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. The reference hole 36 is formed in a shape corresponding to the reference pin 34, and the anti-rotation hole 37 is formed in a shape corresponding to the anti-rotation pin 35. The wire holding member 15 can be positioned by inserting the reference pin 34 into the reference hole 36. Further, the rotation prevention pin 35 is inserted into the rotation prevention hole 37 to prevent the wire holding member 15 from rotating and shifting around the rotation prevention pin 35 when the SMA wire 10 contracts. The wire holding member 15 is held by deforming the tips of the reference pin 34 and the rotation prevention pin 35 by heat caulking.

  A wire holding portion 15c that holds 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 in a key shape. Further, on the −Z side of the wire holding member 15, a terminal portion 15 d connected to a power supply member 9 (see FIG. 4) to be described later extends along the Z direction. Connected.

  As shown in FIG. 2, the SMA wire 10 is opposed to the both ends of the SMA wire 10 with the center axis O interposed therebetween via the wire holding members 15a and 15b, with the intermediate portion locked to the distal end key portion 4e of the guide protrusion 4d. It is fixed to the module frame 5 as shown. The SMA wire 10 is contracted by Joule heat generated when current is supplied through the power supply member 9, and the generated tension is applied to the guide protrusion 4d, so that the lens frame 4 is + Z along the central axis O. It plays a role of driving to the side.

(Leaf spring member)
As shown in FIG. 4, an upper leaf spring 6 is laminated 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 7 is laminated on the −Z side. Since the upper plate spring 6 and the lower plate spring 7 have the same shape, the upper plate spring 6 will be described below, and the description of the lower plate spring 7 will be omitted.
The upper leaf spring 6 is made of a metal plate such as a stainless steel plate, for example. The upper leaf spring 6 has an outer shape in a plan view in the Z direction that is substantially rectangular like the + Z side end of the module frame 5. A substantially circular opening 6 c that is coaxial with the central axis O and slightly larger than the housing portion 4 f of the lens frame 4 is formed at the center of the upper leaf spring 6. Thus, the upper leaf spring 6 is formed in a ring shape as a whole.

  In the vicinity of the corner of the upper leaf spring 6, a through hole 6 b is formed corresponding to the arrangement position of the + Z side fixing pin 14 a formed in the vicinity of the corner of the module frame 5. Further, a pair of positioning holes 6g into which a pair of positioning pins 14c of the module frame 5 are inserted are formed at both ends of one diagonal line of the upper leaf spring 6. Thereby, the upper leaf spring 6 is positioned with respect to the module frame 5 in a plane orthogonal to the central axis O.

  Further, a ring portion 6f is formed on the + R side of the opening 6c, and four slits extending in a substantially semicircular arc shape in the circumferential direction from a position in the vicinity of the through holes 6a that face each other diagonally across the central axis O. 6d is formed in a state in which approximately two quadrants are arranged in the R direction. And four spring parts 6e extended from the rectangular frame body of the outer side of the upper leaf | plate spring 6 in the substantially quadrant arc shape are between the slits 6d arranged in two each in the R direction, Comprising: Are formed between adjacent through holes 6a.

(Intermediate member)
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, and is disposed between the lower plate spring 7 and a module plate member 8 described later. The intermediate member 80 is formed thicker than the thickness of the lower leaf spring 7. Further, the hardness of the intermediate member 80 is formed so as to be closer to the hardness of the lower leaf spring 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 7 are both formed of a metal material such as stainless steel. That is, the hardness of the intermediate member 80 is the same as that of the lower leaf spring 7 and is higher than the hardness of the module plate member 8. The hardness of each member can be defined by the Rockwell hardness defined in Japanese Industrial Standard (JIS) G0202.

  The intermediate member 80 includes a ring part 81 and a plurality of projecting parts that project outward from the outer periphery of the ring part 81 in the radial direction. 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 of the module frame 5 is inserted. Thereby, similarly to the upper leaf spring 6 and the lower leaf spring 7, the intermediate member 80 can be positioned in the R direction and the circumferential direction with respect to the module frame 5.

  The inner diameter of the ring portion 81 of the intermediate member 80 is formed to be equal to the inner diameter of the opening 7 c of the lower leaf spring 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 7. As a result, an impact force on the −Z side acts on the drive module 2, and the spring portion 7 e can collide with the intermediate member 80 when the spring portion 7 e of the lower leaf spring 7 is displaced to the −Z side. 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.

(Module plate member)
FIG. 6 is a perspective view of the module plate member 8.
As shown in FIG. 6, the module plate member 8 is a flat plate member made of resin or the like, and is arranged so as to cover the −Z side of the module frame 5 via the lower plate spring 7 and the intermediate member 80 (FIG. 6). 4).
As shown in FIG. 6, the module plate member 8 has an outer shape in a plan view in the Z direction that is substantially the same as the −Z side end of the module frame 5. In addition, an opening 88 is formed around the central axis O of the module plate member 8 so that the lens unit 12 (see FIG. 5) can be inserted and removed.

At the four corners of the module plate member 8, there are a through hole 8 c into which the −Z side fixing pin 14 b (see FIG. 4) of the module frame 5 is inserted and a −Z side fixing pin 13 b (see FIG. 4) of the lens frame 4. A recess 8b that avoids interference is formed.
Further, a pair of positioning holes 8d into which a pair of positioning pins 14d (see FIG. 4) of the module frame 5 are inserted are formed at both ends of one diagonal line of the substantially rectangular module plate member 8. .
The module plate member 8 and the module frame 5 are fixed by thermally crimping the tip of the -Z side fixing pin 14b. Note that the lower leaf spring 7 and the intermediate member 80 are sandwiched and held by the module plate member 8 and the module frame 5.

On the + Z side surface of the module plate member 8, a lower plate spring contact surface 8 a and a depressed portion 89 that is recessed toward the −Z side on the −R side with respect to the lower plate spring contact surface 8 a are formed.
On the lower leaf spring contact surface 8a, the lower leaf spring 7 (see FIG. 4) is arranged in a state in which a rectangular frame on the + R side from the spring portion 7e (see FIG. 4) is in contact. Further, an intermediate member 80 (see FIG. 4) is disposed in the depressed portion 89.
Here, the depth of the depressed portion 89 is formed to be substantially the same as or greater than the thickness of the intermediate member 80. Accordingly, the intermediate member 80 is disposed on the −Z side of the lower leaf spring 7 and inside the module plate member 8. Even when the opening 7c and the spring portion 7e move to the -Z side, the collision with the intermediate member 80 prevents the opening 7c and the spring portion 7e from directly colliding with the module plate member 8, and the module Damage to the plate member 8 is prevented.

FIG. 7 is a cross-sectional view taken along line BB in FIG.
As shown in FIG. 7, on the −Z side surface of the module plate member 8, a module side reference surface 90 is formed on the + R side of the opening 88. The module-side reference surface 90 is a flat surface protruding to the −Z side, and is formed to be orthogonal to the central axis O. The module side reference surface 90 is in contact with an adapter side reference surface 27 of the adapter member 30 described later, thereby determining the relative position in the Z direction between the drive module 2 and the adapter member 30.

  As shown in FIG. 6, a standing wall 87 is erected along the Z direction from the periphery of the module side reference surface 90 of the module plate member 8. The standing wall 87 is formed in a substantially rectangular shape having a long side along the longitudinal direction of the side surface facing the R direction of the module plate member 8 as viewed from the R direction and a short side along the Z direction. . The standing wall 87 is erected from the approximate center in the longitudinal direction of the side surface of the module plate member 8 toward the −Z side on the + R side of the module side reference surface 90. Two pairs of standing walls 87 are arranged so as to face each other with the central axis O interposed therebetween, and a total of four standing walls 87 are provided. As shown in FIG. 3, one of the four standing walls 87 is disposed so as to cover the + R side of a pair of terminal portions 9c of a power supply member 9 described later.

  As shown in FIG. 5, the standing wall 87 is formed such that the tip 87 a of the standing wall 87 is disposed on the −Z side with respect to the module side reference surface 90. Further, the standing wall 87 is arranged such that the tip 87 a of the standing wall 87 is arranged on the + Z side with respect to the edge surface 29 of the adapter member 30 when the module side reference surface 90 and an adapter side reference surface 27 described later are brought into contact with each other. Is formed. By forming the standing wall 87 in this manner, when the adapter member 30 is disposed on the −Z side of the drive module 2, the module side reference surface 90 and the adapter side reference surface 27 are brought into contact with each other, and the drive module 2 The relative position with respect to the adapter member 30 can be determined. Further, by forming the standing wall 87 in this way, a gap between the tip 87a of the standing wall 87 and the edge surface 29 can be formed when the module side reference surface 90 and the adapter side reference surface 27 are brought into contact with each other.

  A first engaging portion 87 b having a predetermined width in the longitudinal direction is formed on the −R side surface of the standing wall 87 at substantially the center in the longitudinal direction of the standing wall 87. The first engaging portion 87b is formed to protrude to the −R side so that the thickness in the R direction gradually increases from the −Z side tip 87a toward the + Z side. In addition, the 1st engaging part 87b formed in the standing wall 87 (refer FIG. 3) which covers a pair of terminal part 9c is arrange | positioned between a pair of terminal parts 9c. Therefore, the width in the longitudinal direction of the first engaging portion 87b formed on the standing wall 87 covering the pair of terminal portions 9c is formed to be narrower than the distance between the pair of terminal portions 9c. Thereby, the 1st engaging part 87b is engaged with the 2nd engaging part 25 (refer FIG. 8) mentioned later, without interfering with a pair of terminal part 9c.

(cover)
As shown in FIG. 2, 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.
An opening 11a having a substantially circular shape coaxial with the central axis O is provided at the center of the cover 11 on the + Z side surface 11e. The opening 11a is formed in a size that allows the lens unit 12 (see FIG. 5) to be taken in and out.

  The + R side wall 11d of the cover 11 extends from the edge of the + Z side surface 11e toward the -Z side. On the −Z side end surface 11c of the + R side wall portion 11d, a cutout portion 11b cut out on the + Z side is formed at a position corresponding to the above-described standing wall 87. The notch range of the notch portion 11b is formed larger than the outer shape of the standing wall 87, and when the cover 11 is mounted so as to cover the + R side of the module frame 5, the standing wall 87 and the cover 11 interfere with each other. It is preventing. The cover 11 is attached by filling and bonding an adhesive between the −Z side end surface of the notch 11 b and the + Z side end surface of the standing wall 87.

(Power supply member)
As shown in FIG. 4, the power supply member 9 is a flat plate member made of a metal such as copper, and is composed of a pair of electrodes 9A and 9B.
Each of the electrodes 9A and 9B includes a substantially L-shaped wiring portion 9a that follows the outer shape of the module plate member 8, and a terminal portion 9c that protrudes from the end of the wiring portion 9a to the −Z side. Terminal portions 15d of the wire holding members 15a and 15b are electrically connected to the respective wiring portions 9a. As an electrical connection method between the wiring portion 9a and the terminal portion 15d, soldering, adhesion with a conductive adhesive, or the like can be employed.

  Each wiring portion 9 a has a through hole 9 b at a position corresponding to the −Z side fixing pin 14 b of the module frame 5. The power feeding member 9 is fixed to the module frame 5 together with the lower leaf spring 7 and the module plate member 8 by inserting the -Z side fixing pin 14b into the through hole 9b and thermally crimping the tip of the -Z side fixing pin 14b. It is like that. As shown in FIG. 3, the terminal portion 9 c is disposed along the standing wall 87 on the −R side of the standing wall 87 of the module plate member 8, and protrudes from the −Z side of the drive module 2.

(Adapter member)
FIG. 8 is a perspective view of the adapter member 30 of the first embodiment.
As shown in FIG. 8, the adapter member 30 is a hollow box-shaped member having a substantially rectangular shape in a plan view in the Z direction and having a predetermined thickness in the Z direction. The outer shape of the adapter member 30 in plan view in the Z direction is formed substantially the same as the outer shape of the cover 11 in plan view in the Z direction. Note that the thickness of the adapter member 30 in the Z direction is formed to a predetermined thickness corresponding to the specifications of an imaging element (not shown) provided on the lens 50 (see FIG. 5) or the control board 32 (see FIG. 1).
An opening 24 is formed around the center axis O of the adapter member 30. The opening 24 is formed in a substantially circular shape in plan view in the Z direction. The shape of the opening 24 is not limited to a substantially circular shape, and is formed in a predetermined shape corresponding to the specification of the image sensor.
Of the side surfaces facing the R direction of the adapter member 30, a concave portion 26 a recessed to the −R side is formed on one side surface 26 on which the terminal portion 9 c is disposed. By providing the recess 26a, interference between the terminal portion 9c and the adapter member 30 is prevented.

  On the + Z side surface of the adapter member 30, an adapter side reference surface 27 formed around the opening 24 and an intermediate surface formed on the −R side of the adapter side reference surface 27 on the −Z side with respect to the adapter side reference surface 27. 28 and an edge surface 29 arranged on the + R side of the intermediate surface 28 on the −Z side with respect to the intermediate surface 28. That is, two steps are formed on the + Z side surface of the adapter member 30 by the intermediate surface 28 and the adapter side reference surface 27.

  As shown in FIG. 7, the adapter-side reference surface 27 is a flat surface that protrudes toward the + Z side on the + R side of the opening 24 and is formed to be orthogonal to the central axis O. The adapter-side reference surface 27 is formed in a region corresponding to the module-side reference surface 90 described above, and is brought into contact with the module-side reference surface 90 so that the drive module 2 and the adapter member 30 are relatively in the Z direction. The position is determined.

The intermediate surface 28 is formed on the −Z side with respect to the adapter side reference surface 27 and is formed on the + Z side with respect to the edge surface 29, thereby forming a step between the adapter side reference surface 27 and the edge surface 29. ing. By forming a step with the intermediate surface 28, the cross-sectional area of the side surface cross section including the central axis O is increased, and the rigidity of the adapter member 30 is ensured. Further, as will be described later, when the adhesive is filled in the gap between the tip 87a of the standing wall 87 and the edge surface 29 of the adapter member 30, the penetration of the adhesive to the −R side from the edge surface 29 is suppressed. .
Further, among the four corners of the intermediate surface 28, positioning holes 30a along the Z direction are formed in a pair of corner portions sandwiching the central axis O. A positioning pin 14d (see FIG. 3) formed in the module frame 5 is inserted into the positioning hole 30a, and the relative position in the R direction between the drive module 2 and the adapter member 30 is determined.

The edge surface 29 is formed on the −Z side with respect to the intermediate surface 28 so as to follow the outer edge of the adapter member 30 on the + R side of the intermediate surface 28. The edge surface 29 is a flat surface similar to the adapter-side reference surface 27 and is formed to be orthogonal to the central axis O.
Here, the separation distance between the edge surface 29 and the adapter-side reference surface 27 in the Z direction is formed larger than the separation distance between the module-side reference surface 90 and the tip 87a of the standing wall 87 in the Z direction. Thus, when the adapter member 30 is disposed on the −Z side of the drive module 2 with the adapter side reference surface 27 and the module side reference surface 90 in contact with each other, a gap is formed between the edge surface 29 and the tip 87a of the standing wall 87. Is done. As will be described later, the gap is filled with an adhesive, and the edge surface 29 and the tip 87a of the standing wall 87 are bonded and fixed.
Further, the −Z side end surface 11 c of the cover 11 is formed so as to be closer to the −Z side than the module side reference surface 90, and an adhesive is filled in the gap between the edge surface 29 and the −Z side end surface 11 c of the cover 11. Thus, the adapter member 30 is firmly fixed.

Further, the second engagement portion 25 is erected from the edge surface 29 toward the + Z side at a position corresponding to the first engagement portion 87 b of the standing wall 87 on the edge surface 29. As with the first engagement portion 87b, a total of four second engagement portions 25 are erected so as to face each other with the central axis O therebetween.
The second engagement portion 25 is formed to protrude to the + R side so that the thickness in the R direction gradually increases from the + Z side tip toward the −Z side. Then, as will be described later, the drive module 2 and the adapter member 30 are fixed by engaging the first engagement portion 87b and the second engagement portion 25 of the standing wall 87, so that the drive module assembly 1 is formed. Is done.

(Function)
Next, the operation of the drive module assembly 1 will be described.
The drive module assembly 1 (see FIG. 1) is formed by mounting the adapter member 30 on the −Z side of the drive module 2 described above.
Specifically, as shown in FIG. 5, the first engagement portion 87 b and the second engagement portion are disposed while the module side reference surface 90 of the drive module 2 and the adapter side reference surface 27 of the adapter member 30 are opposed to each other. The drive module 2 and the adapter member 30 are brought close to each other by aligning the positions 25. Then, the adapter side reference surface 27 and the module side reference surface 90 are brought into contact with each other as shown in FIG. 7, and the first engagement portion 87b and the second engagement portion 25 are engaged with each other as shown in FIG. Is done.
When the adapter side reference surface 27 and the module side reference surface 90 are brought into contact with each other, the relative position in the Z direction between the drive module 2 and the adapter member 30 is determined. Further, the first engagement portion 87b and the second engagement portion 25 are engaged, so that the relative movement between the drive module 2 and the adapter member 30 is restricted, and the adapter member 30 is placed on the −Z side of the drive module 2. Is fixed.

Further, as described above, when the adapter member 30 is fixed to the −Z side of the drive module 2, a gap is formed between the tip 87 a of the standing wall 87 and the edge surface 29 of the adapter member 30.
In this embodiment, as shown in FIG. 5, this gap is filled with an adhesive 86 from the + R side, and the tip 87 a of the standing wall 87 and the edge surface 29 of the adapter member 30 are bonded. Accordingly, the drive module 2 and the adapter member 30 are firmly fixed by the adhesive 86 in addition to the engagement between the first engagement portion 87 b and the second engagement portion 25.
Here, as shown in FIG. 7, on the −R side with respect to the edge surface 29, a two-step step protruding to the + Z side is formed by the intermediate surface 28 and the adapter side reference surface 27. Due to the two steps, even if the adhesive 86 is filled in the gap between the tip 87a of the standing wall 87 and the edge surface 29, the adhesive is easily held in the gap, and the −R side from the edge surface 29 is more likely to be held. Intrusion of the adhesive is suppressed. Accordingly, it is possible to prevent the adhesive 86 from entering between the adapter side reference surface 27 and the module side reference surface 90 and the adhesive from entering between the lens frame 4 and the module frame 5.

(Effect of 1st Embodiment)
According to this embodiment, the drive module 2 and the adapter member 30 can be easily fixed only by engaging the first engaging portion 87b and the second engaging portion 25.
Further, the module-side reference surface 90 and the adapter-side reference surface 27 are brought into contact with each other, and the first engagement portion 87b and the second engagement portion 25 are engaged with each other, so that the drive module 2 and the adapter member 30 are relative to each other. Since the drive module 2 and the adapter member 30 can be fixed in a state where the position is determined, it is possible to prevent imaging quality defects of the drive module assembly 1.
Moreover, according to this invention, the drive module 2 and the adapter member 30 can be fixed, without using an adhesive agent. Therefore, a dimensional defect due to adhesion of the adhesive to the outer surface of the drive module 2, a malfunction due to the penetration of the adhesive between the lens frame 4 and the module frame 5, the module side reference surface 90 and the adapter side reference surface 27. It is possible to prevent manufacturing defects such as imaging quality defects due to the penetration of the adhesive between the two.

  Further, according to the present embodiment, since the second engaging portion 25 is formed on the edge surface 29 arranged on the −Z side with respect to the adapter side reference surface 27 around the adapter side reference surface 27, the first When engaging the engaging portion 87b and the second engaging portion 25, the module-side reference surface 90 and the adapter-side reference surface 27 can be reliably brought into contact with each other. Thereby, since the drive module 2 and the adapter member 30 can be fixed in a state where the relative position between the drive module 2 and the adapter member 30 is determined with high accuracy, the shift of the focal position is suppressed and the imaging quality defect is surely prevented. it can.

  In addition, according to the present embodiment, the module-side reference surface 90 and the first engagement portion 87b are formed on the module plate member 8 that is a component of the drive module 2, and thus the module-side reference surface 90 and the first engagement portion are formed. The relative position accuracy of the portion 87b can be ensured and formed. Further, since the adapter side reference surface 27 and the second engagement portion 25 are formed on the adapter member 30, the relative position accuracy of the adapter side reference surface 27 and the second engagement portion 25 can be ensured and formed satisfactorily. Accordingly, the first engagement portion 87b and the second engagement portion 25 can be reliably engaged with each other while the module side reference surface 90 and the adapter side reference surface 27 are in contact with each other.

Further, according to the present embodiment, the drive module 2 and the adapter member 30 can be firmly fixed by filling the gap between the tip 87a of the standing wall 87 and the edge surface 29 with the adhesive 86. Further, since the first engaging portion 87b and the second engaging portion 25 are engaged, the drive module 2 and the adapter member 30 need not be fixed with a jig until the adhesive 86 is cured. Also good. Therefore, the drive module 2 and the adapter member 30 can be easily fixed with an adhesive.
Further, the + Z side surface of the adapter member 30 is formed in a stepped shape by the adapter-side reference surface 27 and the edge surface 29 formed on the −Z side with respect to the adapter-side reference surface 27, so the tip 87 a of the standing wall 87. The adhesive filled in the gap between the edge surface 29 and the edge surface 29 can be prevented from entering between the module side reference surface 90 and the adapter side reference surface 27. Accordingly, the module-side reference surface 90 and the adapter-side reference surface 27 can be reliably brought into contact with each other, so that the relative position can be determined. Therefore, it is possible to reliably suppress the deviation of the focal position and further prevent imaging quality defects. In addition, since it is possible to suppress the adhesive 86 from entering between the lens frame 4 and the module frame 5, it is possible to prevent malfunction of the drive module 2.

(Second Embodiment)
FIG. 9 is an external perspective view of the drive module 2 of the second embodiment.
FIG. 10 is an exploded perspective view of the drive module 2 of the second embodiment.
In the drive module 2 of the first embodiment, the first engaging portion 87b is formed on the standing wall 87 of the module plate member 8, and the second engaging portion 25 is formed on the edge surface 29 of the adapter member 30 (FIG. 5). reference).
On the other hand, in the drive module 2 of the second embodiment, the fixing pin 61 is formed as the first engaging portion 60 on the module frame 5 (corresponding to the “support” in the claims), and the middle of the adapter member 30. The second embodiment is different from the first embodiment in that a stepped hole insertion hole 75 including a first insertion hole 71 and a second insertion hole 73 is formed as a second engagement portion 70 on the surface 28 (FIG. 9). And FIG. 10). Note that the description of the same components as in the first embodiment is omitted.

(First engaging part, fixing pin)
As shown in FIG. 9, the drive module 2 is formed with a pair of first engaging portions 60 and 60 that face each other with the central axis O interposed therebetween. The first engagement portion 60 of the present embodiment is a fixing pin 61 that is erected on the −Z side along the Z direction. As shown in FIG. 10, the fixing pins 61 are erected from a pair of corners on one diagonal line on the −Z side end face 5 c of the module frame 5 toward the −Z side.
The fixing pin 61 is formed in a substantially rod shape, and includes a −Z side distal end portion 62 and a + Z side main body portion 65 relative to the distal end portion 62.

  As shown in FIG. 9, the distal end portion 62 of the fixing pin 61 is formed to have a larger diameter than the main body portion 65 of the fixing pin 61, and the first insertion hole 71 in an insertion hole 75 (see FIG. 11) described later. It projects outward so as to have a larger diameter than (see FIG. 11). In addition, a single slit 63 having a predetermined width is formed at the distal end portion 62 of the fixing pin 61 along the radial direction of the fixing pin 61. Thereby, the front-end | tip part 62 of the fixing pin 61 is divided | segmented by the slit 63, and the two overhang | projection parts 62a and 62b are formed on both sides of the slit 63. FIG. Thereby, the two overhanging portions 62 a and 62 b can be easily elastically deformed in the radial direction of the fixing pin 61.

11 is a cross-sectional view taken along line CC in FIG. In FIG. 11, the lens unit 12 (see FIG. 5) is omitted for ease of viewing.
As shown in FIG. 11, the fixing pin 61 includes a positioning hole 7 f of the lower plate spring 7, a positioning hole 85 of the intermediate member 80, a positioning hole 8 d of the module plate member 8, and a first insertion hole 71 of the adapter member 30 described later. The second insertion holes 73 are inserted in this order. The diameter of the main body portion 65 of the fixing pin 61 is equal to the diameters of the positioning hole 7f of the lower leaf spring 7, the positioning hole 85 of the intermediate member 80, the positioning hole 8d of the module plate member 8, and the first insertion hole 71 of the adapter member 30. It is formed substantially the same. The main body portion 65 of the fixing pin 61 positions the lower plate spring 7, the intermediate member 80, the module plate member 8, and the adapter member 30.

(Second engagement part)
FIG. 12 is a perspective view of the adapter member 30 of the second embodiment.
As shown in FIG. 12, among the four corners of the intermediate surface 28 of the adapter member 30, an insertion hole 75 penetrating the intermediate surface 28 along the Z direction is formed at a pair of corner portions sandwiching the central axis O. Yes. As shown in FIG. 11, the insertion hole 75 is a first insertion hole 71 disposed on the + Z side, and a second insertion hole 71 disposed on the −Z side of the first insertion hole 71 and having a larger diameter than the first insertion hole 71. A stepped hole is formed by the insertion hole 73.
The diameter of the first insertion hole 71 is smaller than the diameter of the distal end portion 62 of the fixing pin 61 and is formed to be substantially the same as the diameter of the main body portion 65 of the fixing pin 61.
The diameter of the second insertion hole 73 is formed so as to be larger than the diameter of the distal end portion 62 of the fixing pin 61 (that is, the overhang portions 62a and 62b) when viewed from the Z direction. Further, the depth of the second insertion hole 73 is formed so as to be deeper than the length of the distal end portion 62 of the fixing pin 61 in the Z direction. Accordingly, the overhang portions 62 a and 62 b of the fixing pin 61 can be accommodated in the second insertion hole 73.

  In the drive module 2 and the adapter member 30, the fixing pin 61 is inserted into the insertion hole 75 from the + Z side to the −Z side, the overhang portions 62 a and 62 b of the fixing pin 61, and − of the first insertion hole 71. The Z-side opening periphery is fixed by engaging with each other. Specifically, when the fixing pin 61 is inserted into the first insertion hole 71, the overhang portions 62 a and 62 b of the fixing pin 61 pass through the first insertion hole 71 while being elastically deformed radially inward of the fixing pin 61. To do. Thereafter, when the overhang portions 62a and 62b of the fixing pin 61 pass through the first insertion hole 71 and reach the second insertion hole 73 on the -Z side, the overhang portions 62a and 62b of the fixing pin 61 are caused by elastic restoring force. Spreads radially outward. As a result, the opening peripheral edge portion on the −Z side of the first insertion hole 71 and the + Z side surface 62c of the overhang portions 62a and 62b of the fixing pin 61 are engaged, and movement in the Z direction is restricted. Further, since the diameter of the main body portion 65 of the fixing pin 61 is formed substantially the same as the diameter of the first insertion hole 71, the main body portion 65 of the fixing pin 61 is disposed in the first insertion hole 71 and driven. The relative position in the R direction between the module 2 and the adapter member 30 is restricted. That is, the drive module 2 and the adapter member 30 are fixed by the first engagement portion 60 and the second engagement portion 70 in a state where the relative positions in the Z direction and the R direction are restricted.

(Effect of 2nd Embodiment)
According to this embodiment, after the fixed pin 61 is inserted into the first insertion hole 71 by elastically deforming the distal end portion 62 of the fixed pin 61 that is the first engaging portion 60, the overhang portions 62a and 62b are inserted. Engages with the opening peripheral edge of the first insertion hole 71. Thereby, the 1st engaging part 60 and the 2nd engaging part 70 can be engaged, and the drive module 2 and the adapter member 30 can be fixed easily. In particular, since the drive module 2 and the adapter member 30 can be fixed by a simple method in which the fixing pin 61 is engaged with the insertion hole 75, the efficiency of the assembly work of the drive module assembly 1 can be improved.
Even after the first engaging portion 60 and the second engaging portion 70 are once engaged, the first engaging portion 60 and the second engaging portion 60 are secondly deformed by elastically deforming the distal end portion 62 of the fixing pin 61. The engagement with the engagement portion 70 can be released. As a result, even if a failure or the like occurs in the components constituting the drive module assembly 1 or an assembly failure occurs, the engagement between the first engagement portion 60 and the second engagement portion 70 is released. Thus, the drive module 2 and the adapter member 30 can be easily disassembled. Therefore, the drive module 2 and the adapter member 30 can be easily disassembled. Therefore, the drive module 2 and the adapter member 30 can be disassembled and dealt with promptly, and it is easy to reduce waste parts.

  Further, according to the present embodiment, since the second engagement portion 70 is formed on the intermediate surface 28 arranged on the −Z side with respect to the adapter side reference surface 27 around the adapter side reference surface 27, the first When the engaging portion 60 and the second engaging portion 70 are engaged, the module-side reference surface 90 and the adapter-side reference surface 27 can be reliably brought into contact with each other. Thereby, since the drive module 2 and the adapter member 30 can be fixed in a state where the relative position between the drive module 2 and the adapter member 30 is determined with high accuracy, the shift of the focal position is suppressed and the imaging quality defect is surely prevented. it can.

  In addition, according to the present embodiment, by forming the slit 63 at the distal end portion 62 of the fixing pin 61, the overhang portions 62a and 62b divided in the circumferential direction of the fixing pin 61 can be easily elastically deformed in the radial direction. . As a result, the overhang portions 62a and 62b of the fixing pin 61 can be elastically deformed radially inward to engage and release the fixing pin 61 and the insertion hole 75, so that the drive module 2 and the adapter member 30 can be easily connected. Can be assembled and disassembled. Therefore, the assembling work is further facilitated and the drive module 2 and the adapter member 30 are more securely fixed.

  Further, according to the present embodiment, the overhang portions 62 a and 62 b of the fixing pin 61 protrude from the adapter member 30 by accommodating the overhang portions 62 a and 62 b of the fixing pin 61 in the second insertion hole 73. Can be prevented. Therefore, when the drive module assembly 1 is mounted on other components such as the control board 32, the protruding portions 62a and 62b of the fixing pin 61 can be prevented from interfering with the other components.

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

  FIG. 13 is an explanatory diagram of the camera-equipped mobile phone 20. FIG. 13A is an external perspective view of the front side of the camera-equipped mobile phone 20. FIG. 13B is an external perspective view of the back side of the camera-equipped mobile phone 20. FIG.13 (c) is sectional drawing along the FF line of FIG.13 (b). As shown in FIG. 13A, the camera-equipped mobile phone 20 according to the present embodiment includes a receiver 22a, a transmitter 22b, an operation unit 22c, a liquid crystal display 22d, an antenna 22e, and not shown. 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. 13B, the telephone cover 22 on the back side on the side where the liquid crystal display unit 22d is provided is provided with a window 22A through which external light is transmitted.
Then, as shown in FIG. 13 (c), the opening 11a of the cover 11 of the drive module 2 faces the window 22A of the telephone cover 22, and the drive module assembly is arranged so that the central axis O is along the normal direction of the window 22A. A solid 1 is installed. The drive module assembly 1 is mechanically and electrically connected to the control board 32. The control board 32 is connected to a control circuit unit (not shown) so that power can be supplied to the drive module 2.

  With this configuration, the light transmitted through the window 22 </ b> A can be collected by the lens unit 12 (see FIG. 5) of the drive module 2 and imaged on the image sensor 40. Then, by supplying appropriate power to the drive module 2 from the control circuit unit, the lens unit 12 can be driven along the central axis O, the focal position can be adjusted, and photographing can be performed.

(effect)
According to the camera-equipped mobile phone 20 of the present embodiment, by providing the drive module assembly 1 that can easily fix the drive module 2 and the adapter member 30, the camera-equipped mobile phone 20 can be manufactured at low cost. Can do. Further, by providing the drive module assembly 1 free from manufacturing defects such as dimensional defects, operational defects, and imaging quality defects, a high-quality camera-equipped mobile phone 20 can be obtained.

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 each 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 VCM (voice coil motor), a piezoelectric actuator, or the like is used as an actuator. The lens frame 4 may be driven by using it.

  In each embodiment, although the module frame 5 was demonstrated as a substantially rectangular member as a whole, it is not limited to a substantially rectangular shape, A polygonal shape may be sufficient.

  In each embodiment, the example of the camera-equipped mobile phone 20 has been described as an embodiment of the camera module including the drive module assembly 1, but the 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.

  In each embodiment, two pairs of the first engaging portion 87b and the second engaging portion 25 facing each other are formed. However, at least one pair of the first engaging portion 87b and the second engaging portion 25 is formed. Just do it. However, this embodiment has an advantage in that the drive module 2 and the adapter member 30 can be fixed more reliably.

  In the first embodiment, the gap between the tip 87a of the standing wall 87 and the edge surface 29 is filled with the adhesive 86, and in addition to the first engagement portion 87b and the second engagement portion 25, the drive module 2 is driven by the adhesive 86. And the adapter member 30 are fixed, but the drive module is formed only by engaging the first engaging portion 87b and the second engaging portion 25 without using the adhesive 86 in the gap between the tip 87a of the standing wall 87 and the edge surface 29. 2 and the adapter member 30 may be fixed. However, the present embodiment is advantageous in that the drive module 2 and the adapter member 30 can be firmly fixed.

  In each embodiment, the adhesive 86 is filled into the gap between the tip 87a of the standing wall 87 and the edge surface 29 of the adapter member 30 from the + R side. However, for example, the adhesive 86 is applied to the edge surface 29 of the adapter member 30 in advance, and then the drive module 2 is assembled, whereby the tip 87a of the standing wall 87 and the edge surface 29 of the adapter member 30 are bonded together with the adhesive 86. You may do it.

  In each embodiment, the intermediate surface 28 is provided between the adapter-side reference surface 27 and the edge surface 29 in the Z direction, and two steps are formed on the + Z side surface of the adapter member 30. There is no need to provide it, and the adapter-side reference surface 27 and the edge surface 29 may form one step on the + Z side surface of the adapter member 30. However, this embodiment has an advantage in that the strength of the adapter member 30 can be ensured.

  In the second embodiment, the fixing pin 61 and the insertion hole 75 that is the second engaging portion 70 are engaged by elastically deforming the tip 62 of the fixing pin 61 that is the first engaging portion 60. . On the other hand, for example, a first slit is formed by elastically deforming the radially outer side of the insertion hole 75 by forming a slit along the radial direction on the outer side of the insertion hole 75 that is the second engagement portion 70. The fixing pin 61 that is the engaging portion 60 and the first insertion hole 71 that is the second engaging portion 70 may be engaged. In addition, the fixing pin 61 and the insertion hole 75 are engaged by elastically deforming both the distal end portion 62 of the fixing pin 61 that is the first engagement portion 60 and the insertion hole 75 that is the second engagement portion 70. May be.

In the second embodiment, the second engagement portion 70 is formed in the stepped insertion hole 75 by the first insertion hole 71 and the second insertion hole 73, but even if only the first insertion hole 71 is formed. Good. However, by providing the second insertion hole 73, the overhang portions 62a and 62b of the fixing pin 61 can be accommodated in the second insertion hole 73, and this embodiment is superior to the present embodiment in that interference with other parts can be prevented. There is.
In the second embodiment, the overhang portions 62a and 62b of the fixing pin 61 may be further expanded in diameter by, for example, thermally welding the overhang portions 62a and 62b of the fixing pin 61. Thereby, the drive module 2 and the adapter member 30 can be firmly fixed.

DESCRIPTION OF SYMBOLS 1 ... Drive module assembly 2 ... Drive module 4 ... Lens frame (driven body) 5 ... Module frame (support body) 8 ... Module board member 20 ... Mobile phone with camera (Camera module) 25, 70 ... 2nd engaging part 27 ... Adapter side reference surface 29 ... Edge surface 30 ... Adapter member 60, 87b, ... 1st engaging part 61 ...・ Fixing pin 62... Tip portion 62 a... Overhang portion 62 b... Overhang portion 63... Slit 71... First insertion hole 73. 86: Adhesive 87 ... Standing wall 87a ... Tip 90 ... Module side reference plane O ... Center axis

Claims (10)

A drive module comprising: a cylindrical support; and a driven body disposed inside the support so as to be capable of reciprocating along the axial direction of the support;
On one side of the drive module in the axial direction, an adapter member disposed coaxially with the central axis of the support,
A drive module assembly comprising:
A module-side reference surface for determining a relative position in the axial direction between the drive module and the adapter member is formed on the one side surface of the drive module,
An adapter-side reference surface that determines the relative position of the drive module and the adapter member in the axial direction is formed on the other surface of the adapter member in the axial direction by contacting the module-side reference surface. And
The drive module is formed with at least one pair of first engaging portions facing each other across the central axis,
In the adapter member, a second engagement portion is formed at a position corresponding to the first engagement portion in a portion different from the adapter side reference surface.
The drive module and the adapter member are fixed by engaging the first engagement portion and the second engagement portion while bringing the module-side reference surface and the adapter-side reference surface into contact with each other. A drive module assembly, wherein The drive module assembly according to claim 1,
The other side surface of the adapter member has an edge surface disposed on the one side with respect to the adapter side reference surface,
The drive module assembly, wherein the second engaging portion is formed on the edge surface. The drive module assembly according to claim 2, comprising:
The drive module includes a module plate member that is fixed to the support and covers the one side of the support,
The module side reference surface is formed on the one side surface of the module plate member,
The drive module assembly, wherein the first engaging portion is erected along the axial direction from the periphery of the module-side reference surface of the module plate member. The drive module assembly according to claim 2 or 3,
The first engagement portion is provided on a standing wall that is erected along the axial direction from the periphery of the module-side reference surface,
A drive module assembly, wherein a gap between a tip of the standing wall and the edge surface is filled with an adhesive. The drive module assembly according to claim 1,
The first engaging portion is a fixing pin that is erected along the axial direction from the surface on the one side of the support,
The second engagement portion is an insertion hole through which the fixing pin is inserted,
The tip of the fixing pin projects outwardly so as to have a diameter larger than the diameter of the insertion hole and engages with the opening peripheral edge of the insertion hole, so that the fixing pin comes out of the insertion hole. A drive module assembly, characterized in that an overhanging portion for restricting this is formed. The drive module assembly according to claim 5, wherein
The other side surface of the adapter member is
An intermediate surface disposed on the one side of the adapter side reference surface,
An edge surface disposed further on the one side than the intermediate surface;
Have
The drive module assembly, wherein the second engaging portion is formed on the intermediate surface. The drive module assembly according to claim 6, comprising:
The drive module includes a module plate member that is fixed to the support and covers the one side of the support,
The module side reference surface is formed on the one side surface of the module plate member,
The module plate member includes a standing wall erected along the axial direction from the periphery of the module-side reference surface,
A drive module assembly, wherein a gap between a tip of the standing wall and the edge surface is filled with an adhesive. The drive module assembly according to any one of claims 5 to 7,
The fixing pin is formed with a slit that divides the tip into a plurality of circumferential directions of the fixing pin,
The drive module assembly, wherein each of the divided end portions is formed with the protruding portion. The drive module assembly according to any one of claims 5 to 8,
The insertion hole is a stepped hole having a first insertion hole and a second insertion hole having a diameter larger than that of the first insertion hole.
The drive module assembly, wherein the protruding portion of the fixing pin is engaged with an opening peripheral portion of the first insertion hole in a state of being accommodated in the second insertion hole.   A camera module comprising the drive module assembly according to claim 1.

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