JP2013178457A - Drive module and electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily assemble a drive module.SOLUTION: A drive module 1 includes: a resin-made module frame 4 having cylindrical shape and a bridge part 25 in which a dimension in an axial direction is smaller than other portions; a resin-made lens frame 5 stored inside of the module frame 4 movably in an axial direction and having a head part 56 projected to the outside over the bridge part 25; an upper plate spring 8 and a lower plate spring 10 for supporting the lens frame 5 on the module frame 4 movably in the axial direction; an SMA wire engaged with a hook part 62 of the lens frame 5, allowed to be contracted by energization and capable of driving the lens frame 5 in the axial direction in a direction (upward in the shown figure) separated far from a reference position during non-energization; and a pair of metal-made power supply members 6 and 7 fixed on the module frame 4 and capable of supporting an end part of the SMA wire and supplying electricity to the SMA wire. The head part 56 of the lens frame 5 is placed on an upper part of the bridge part 25.

Description

  The present invention relates to a drive module suitable for, for example, driving an optical system to adjust a focal position, or driving a movable member to be used as an actuator, and an electronic apparatus including the drive module.

  Conventionally, various small electronic devices equipped with a drive module have been proposed. For example, a mobile phone with a camera function is equipped with a drive module that drives a lens frame (driven body) that holds a lens unit in order to perform autofocus, zoom, and the like.

  As this type of drive module, conventionally, for example, as shown in Patent Document 1, a cylindrical module frame (support), a lens frame housed inside the module frame, and the lens frame Drive means for reciprocating along the axial direction of the module frame, leaf springs held on both end faces of the module frame to urge the lens frame from both axial sides along the axial direction of the module frame, and these module frames, A cover provided with a lens frame, a driving means, and a cover that covers a leaf spring is known.

  The drive means also serves as a shape memory alloy wire disposed outside the outer surface of the module frame and a holding member disposed along the outer surface of the module frame and holding both ends of the shape memory alloy wire. And a pair of power supply members for supplying power to the shape memory alloy wire. In addition, a part of the outer periphery of the lens frame is provided with a protruding part that protrudes outward from the module frame across the bridge formed at the corner of the module frame from below. An intermediate portion of the shape memory alloy wire is hung from below on a hook portion provided at the tip.

  Further, the inner peripheral surface of the module frame is formed with a contact portion that protrudes inwardly, and when the lens frame moves upward, the upper surface of the contact portion that is formed to protrude on the outer peripheral portion of the lens frame However, the lens frame restricts the lens frame from moving further upward by hitting the receiving portion from below.

  According to the drive module having the above-described configuration, the lens frame reciprocates relative to the module frame in the axial direction by operating the power supply to the shape memory alloy wire to expand and contract the shape memory alloy wire. As a result, the lens unit held by the lens frame can be moved to perform autofocus, zoom, or the like.

  Further, in the drive module having the above-described configuration, since the contact portion of the lens frame is configured to abut against the receiving portion of the module frame from below, when the lens frame is housed inside the module frame during assembly, The lens frame cannot be assembled unless it is inserted from below the module frame. Therefore, the protruding portion of the lens frame has to straddle the lower side of the bridge portion in the module frame.

JP 2010-20177 A

By the way, in a mobile phone with a camera function, in order to improve camera performance, there is a demand for a large lens, and a lens frame is required to be enlarged.
However, in the structure where the protruding part of the lens frame straddles the lower side of the bridge part of the module frame as described above, if the lens frame is enlarged without changing the size of the cover and the outer shape of the module frame, the lens frame moves up and down. When the dimensions are set so that the protruding part does not interfere with the bridge part protruding outside the bridge part, the thickness of the bridge part (thickness in the radial direction) is not sufficiently thin. As a result, the mechanical strength of the module frame is reduced.

  On the other hand, when the lens frame is enlarged, if the thickness of the bridge portion is set giving priority to the mechanical strength of the module frame, the module frame and the cover must be enlarged, leading to an increase in the size of the drive module, and consequently This will increase the size of mobile phones with camera functions.

  Therefore, the present invention provides a drive module and an electronic device that can enlarge the driven body without increasing the external dimensions of the support.

The present invention employs the following means in order to solve the above problems.
The drive module according to the present invention includes:
A cylindrical support, and a resin support having a bridge portion whose dimension along the axial direction is smaller than other parts,
A resin driven body that is disposed inside the support body, is accommodated so as to be movable in the axial direction of the support body, and has an overhang portion that protrudes outside the support body across the bridge portion;
A spring member that connects the support and the driven body, and supports the driven body so as to be movable in the axial direction of the support;
Arranged along the outside of the support body, locked to the overhang portion of the driven body, contracted by energization, and moved the driven body away from the reference position during non-energization along the axial direction. A shape memory alloy wire driven in the direction;
A pair of metal power supply members fixed to the support and supporting an end of the shape memory alloy wire and supplying electricity to the shape memory alloy wire;
In a drive module with
The overhang portion of the driven body is arranged on the front side in the moving direction of the driven body from the reference position with respect to the bridge portion of the support body.

According to this configuration, when the drive module is assembled, the driven body is inserted into the support body from the opening of the support body on the side far from the reference position, and moved in a direction approaching the reference position to move the inside of the support body. Can be accommodated.
In addition, since the overhang portion of the driven body is arranged on the front side in the moving direction of the driven body from the reference position with respect to the bridge portion of the support body, the radial thickness of the bridge portion is set. Therefore, since it is not necessary to consider interference with the overhang portion, the thickness can be reduced, and as a result, the radial dimension of the driven body can be increased.

Further, in the drive module according to the present invention, the power supply member is connected to the end of the support body on the front side in the moving direction of the driven body from the reference position, and is connected to the fixing section. A receiving portion that protrudes inward from the end surface of the support body, and the driven body abuts against the receiving portion of the power supply member when moved in the axial direction from the reference position. A contact portion is provided.
According to this configuration, when the driven body moves, the contact portion of the driven body can be abutted against the reception portion of the power supply member, and the drive body moves forward from the reference position. The movement range can be limited.

Further, the drive module according to the present invention is a portion connected to the contact portion in the driven body and opposed to the inner edge portion of the contact portion of the power supply member, more than the contact portion. A low ground part is formed in the direction.
According to this configuration, the inner edge portion of the power supply member can be prevented from coming into contact with the driven body when the contact portion of the driven body hits the receiving portion of the power supply member. It is possible to prevent the driven body from being scraped by the inner edge of the metal power supply member.

Further, in the drive module according to the present invention, the spring member has a ring shape, one end is connected to an end surface on one axial side of the support, and the other end on the opposite side in the radial direction is the driven body. It is connected with the end surface of the said axial direction one side of this.
According to this configuration, the spring member can be supported on the support body in a cantilevered manner, and the spring member can be formed into a simple shape. Since only a part of the spring member in the circumferential direction (the other end on the opposite side in the radial direction) is connected to the driven member, the connecting portion of the driven member with the spring member can be reduced, and as a result, the driven member is driven. The inner diameter of the body can be increased.

The drive module according to the present invention is characterized in that the other end of the spring member is connected to the end face in the vicinity of an overhang portion of the driven body.
According to this configuration, since the vicinity of the driven body driven by the shape memory alloy wire can be supported by the spring member, it is possible to stabilize the posture during movement of the driven body, and to smoothly It becomes possible to move.

Further, the drive module according to the present invention is configured such that the fixed portion of the pair of power supply members and the one end side of the spring member are stacked with an insulating member interposed therebetween, and the driven body from the reference position is stacked. It is mounted on the end face of the support body on the front side in the moving direction, and is fixed to the end face of the support body.
According to this configuration, even if the power feeding member and the spring member are arranged so as to overlap each other, it is possible to prevent the power feeding members from being short-circuited via the spring member.

Further, in the drive module according to the present invention, the fixing portion of the power supply member, the insulating member, the one end side of the spring member, and the end surface of the support member are fixed to each other with a lamination partner. It is characterized by.
According to this configuration, the fixing portion of the power supply member, the insulating member, and one end of the spring member can be easily fixed to the end surface of the support.

In the drive module according to the present invention, the fixing portion of the power supply member, the insulating member, and the one end side of the spring member are fixed pins formed to protrude from the end surface of the support at the stacked portions. Is fixed to the end surface of the support body by caulking the tip of the fixing pin.
According to this configuration, since the fixing portion of the power supply member, the insulating member, and one end side of the spring member can be fixed to the end surface of the support body with a common fixing pin, the number of parts and the number of assembly steps can be reduced. And cost can be reduced.

Further, in the drive module according to the present invention, the fixing portion of one of the pair of power supply members is disposed on the end surface of the support body on the front side in the movement direction of the driven body from the reference position. A first seat surface to be placed and a second seat surface on which the fixing portion of the other power supply member is placed are provided, and the first seat surface and the second seat surface are moved by the driven body. The first seating surface on the higher side is placed in a state where the fixing portion of the one power feeding member and the one end side of the spring member are stacked on the first seat surface on the higher side. The fixing portion of the other power feeding member is placed and fixed on the lower second seat surface.
According to this configuration, since the pair of power feeding members can be attached with a difference in height, when the driven body moves, the other power feeding member fixed to the lower second seat surface and the spring member are It can be made not to contact, and it can prevent that a pair of electric power feeding members short-circuit via a spring member.

In the drive module according to the present invention, the first seat surface of the support body, the fixing portion of the one power feeding member, and the one end side of the spring member are fixed to each other with a lamination partner, and the support The second seating surface of the body and the fixing portion of the other power feeding member are fixed by adhesion.
According to this configuration, the fixing portion of one power supply member and the one end side of the spring member can be easily fixed to the first seat surface of the support, and the fixing portion of the other power supply member is fixed to the second seat of the support. Can be easily fixed to the surface.

In the driving module according to the present invention, the fixing portion of the one power feeding member and the one end side of the spring member are formed on the laminated portion so as to protrude from the first seating surface of the support body. Is fixed to the first seat surface by caulking the tip of the fixing pin, and the fixing portion of the other power supply member is formed to protrude from the second seat surface of the support body. The fixing pin penetrates and is fixed to the second seat surface by caulking the tip of the fixing pin.
According to this configuration, the fixing portion of one power supply member and the one end side of the spring member can be fixed by a common fixing pin, so that the number of parts can be reduced, the number of assembly steps can be reduced, and the cost can be reduced. Can be reduced.

Moreover, the drive module according to the present invention is characterized in that an insulating member is sandwiched between the fixed portion of the one power feeding member and the one end side of the spring member.
According to this configuration, since the one power supply member fixed to the first seat surface and the spring member are insulated by the insulating member, it is ensured that the pair of power supply members are short-circuited via the spring member. Can be prevented.

In addition, the drive module according to the present invention includes a regulating member that regulates a spring length of the spring member.
According to this configuration, variation in the spring constant of the spring member can be prevented, and product variation in the performance of the drive module can be suppressed.

In addition, the drive module according to the present invention includes a top cylindrical cover that accommodates the support, the driven body, the spring member, the shape memory alloy wire, and the power supply member, and the spring member includes: The power supply member is provided with a backing portion that is disposed so as to overlap the receiving portion, and the backing portion and the top inner surface of the cover are in contact with each other.
According to this configuration, when the driven body moves in the axial direction due to dropping or the like and the contact portion of the driven body hits the reception portion of the power supply member, the contact portion of the power supply member becomes the spring member. Since it is received on the inner surface of the cover through the backing portion, even when the contact portion strongly hits the support portion, damage to the power feeding member can be prevented.

An electronic apparatus according to the present invention includes the drive module according to any one of claims 1 to 14.
According to this configuration, in the electronic device, the device attached to the driven body can be enlarged.

  According to the drive module and the electronic apparatus according to the present invention, when the drive module is assembled, the driven body is inserted into the support body from the opening of the support body on the side far from the reference position, in a direction approaching the reference position. It can be moved and accommodated inside the support. Further, the radial dimension of the driven body can be increased without increasing the outer dimension of the support.

It is an external appearance perspective view of the drive module in the 1st Embodiment of this invention. It is a top view of the drive module in the 1st embodiment. It is a disassembled perspective view of the drive module in the said 1st Embodiment. It is an external appearance perspective view of the state which removed the cover in the drive module of the said 1st Embodiment. It is a side view of the state where the cover was removed in the drive module of the 1st embodiment. It is a perspective view which shows the cross section cut by the AA line of FIG. It is a perspective view which shows the cross section cut by the BB line of FIG. It is a top view in the state where the cover, the upper leaf spring, and the insulating sheet were removed in the drive module of the first embodiment. It is a top view in the state where the cover was removed in the drive module of the 1st embodiment. It is the bottom view which looked at the state which removed the cover and the module lower board in the drive module of the said 1st Embodiment from the downward direction. FIG. 3 is a perspective view of a main part when a restriction plate is provided in the drive module of the first embodiment. FIG. 5 is a cross-sectional view of a main part when a spring pressing protrusion is provided on the cover in the drive module of the first embodiment. It is a disassembled perspective view of the drive module in the 2nd Embodiment of this invention. It is a top view in the state where the cover, the upper leaf spring, and the insulating sheet were removed in the drive module of the second embodiment. It is a top view in the state where the cover and the upper leaf spring were removed in the drive module of the 2nd embodiment. It is drawing of the electronic device in embodiment of this invention, (a) is a front perspective view, (b) is a back perspective view, (c) is sectional drawing which follows the CC line of (b).

Hereinafter, embodiments of a drive module and an electronic apparatus according to the present invention will be described with reference to the drawings.
In the following embodiment, a description will be given by taking a lens unit drive module (not shown) in the camera as an example.

<First Embodiment of Drive Module>
First, a first embodiment of the drive module according to the present invention will be described with reference to the drawings of FIGS.
The drive module 1 of the first embodiment shown in FIG. 1 is formed in a box shape as a whole. After the assembly is completed, the drive module 1 is fixed on a substrate (not shown) for supplying a control signal and electric power to the drive module 1 and is attached to an electronic device or the like. A drive unit 2 fixed to the substrate and a top cover 3 covering the drive unit 2 are provided.

An alternate long and short dash line S in the figure indicates a central axis of a module frame 5 of the drive unit 2 described later, and this axis S is an axis of the drive module 1 that coincides with the optical axis of a lens unit (not shown). The module 1 moves the lens unit along the axis S in the vertical direction in the figure.
In the following description, even in the description of each disassembled component, the position and direction may be referred to based on the positional relationship with the axis S at the time of assembly. For example, even when there is no clear circle or cylindrical surface in the component, unless there is a risk of misunderstanding, the direction along the axis S is simply referred to as “axial direction”, and the radial direction of the circle centered on the axis S is The circumferential direction of a circle centered on the axis S may be simply referred to as “circumferential direction”. Unless otherwise specified, the description will be made assuming that one side in the axial direction (upper side in FIG. 1) is “upper” and the other side in the axial direction (lower side in FIG. 1) is “lower”. Further, the height along the axial direction may be simply referred to as “height”.

As shown in FIG. 3, the drive unit 2 includes a cylindrical module frame (support) 4 and a cylindrical lens frame (driven body) arranged coaxially with the module frame 4 inside the module frame 4. 5, a first power supply member 6 and a second power supply member 7 disposed on the module frame 4, an upper leaf spring (spring member) disposed on the module frame 4, the lens frame 5, and the power supply members 6, 7. ) 8, an insulating sheet (insulating member) 9 disposed between the first power supply member 6 and the upper leaf spring 8, and a lower leaf spring (spring member) 10 disposed under the module frame 4 and the lens frame 5. And a shape memory alloy in which both end portions are connected to the first power supply member 6 and the second power supply member 7, and the intermediate portion is locked to the lens frame 5. Shape Memory Alloy (hereinafter abbreviated as SMA) wire 12, lens frame 5 and cover 3 And a, a coil spring 13 disposed between the.
The lens frame 5 is loosely inserted inside the module frame 4 so as to be vertically movable with respect to the module frame 4 along the axial direction.

Hereinafter, each component of the drive unit 2 will be described in detail.
As shown in FIG. 3, the module frame 4 is an annular member that accommodates the lens frame 5 inside, and is a support that supports the lens frame 5 via an upper leaf spring 8 and a lower leaf spring 10.
The outer shape of the entire module frame 4 is formed in a substantially rectangular shape in plan view, and is constituted by four side walls 21, 22, 23, 24 and a bridge part 25 that connects the side walls 23, 24 connected in a ring shape. Has been. The lower end surface of the module frame 4 is formed at substantially the same level, but the height of the upper end surface from the lower end surface is different in the circumferential direction. The upper end surface 25 a of the bridge portion 25 is the lowest height among the upper end surfaces of the module frame 4. The upper end surface connected to the corner portion 28 of the module frame 4 positioned diagonally with respect to the bridge portion 25 is a flat upper end surface (first seat surface) 26 positioned highest among the upper end surfaces of the module frame 4. The upper upper end surface 26 continues to the vicinity of the corner 29 where the side wall portions 21 and 24 are connected over substantially the entire length in the circumferential direction of the upper end surface of the side wall portion 21, and the side wall portions 22 and 23. Is continued to approximately half of the circumferential direction of the upper surface portion of the side wall portion 22 toward the corner portion 30 to which is connected.

The upper end surface of the side wall portion 22 other than the upper upper end surface 26 is a flat lower upper end surface (second seat surface) 27 that is one step lower than the upper upper end surface 26, and the lower upper end surface 27 is a corner portion. It continues to the top of 30. The upper end surface of the side wall portion 23 is configured by an inclined surface that gradually decreases from the lower upper end surface 27 toward the upper end surface 25 a of the bridge portion 25, and the upper end surface of the side wall portion 24 extends from the higher upper end surface 26. It is comprised by the inclined surface which becomes low gradually as the upper end surface 25a of the bridge part 25 approaches.
That is, the upper end surface of the module frame 4 includes a high-order upper end surface 26 and a lower-order upper end surface 27 that are formed in steps with a difference in height.

  The inner peripheral part of the module frame 4 has a substantially circular shape in plan view. As shown in FIGS. 3 and 8 to 10, in the inner peripheral portion of the module frame 4, a portion facing the inside of the bridge portion 25, a corner portion 28 positioned diagonally of the bridge portion 25, and other two A first guide portion 31, a second guide portion 32, a third guide portion 33, and a fourth guide portion 34 that bulge outward in the radial direction and penetrate in the vertical direction are formed at the two corner portions 29 and 30.

The high-order upper end surface 26 is fixed to extend upward along the axial direction at a total of three locations on both sides of the second guide portion 32 of the corner portion 28 and in the vicinity of the third guide portion 33 of the corner portion 29. Each of the pins 35 protrudes.
On the lower upper end surface 27, fixing pins 36 extending upward along the axial direction are respectively provided on both sides of the fourth guide portion of the corner portion 30.
Further, fixed pins 37 extending downward in the axial direction are respectively provided on the lower end surfaces of the three corners 28, 29, 30 of the module frame 4.
Further, in the vicinity of the lower end surface from which the fixing pin 37 protrudes at the corner portion 28, a lower end surface 39 is formed one step above, and as shown in FIG. Fixing pins 38 projecting downward along the axial direction are respectively provided on both sides of the portion 32.

  The module frame 4 is integrally formed of a thermoplastic resin that can be heat-clamped or ultrasonically-clamped, such as polycarbonate (PC) or liquid crystal polymer (LCP) resin. In addition, in FIG. 3, although the front-end | tip of each fixing pin 35-38 is shown with the form after heat crimping, in the state of the components before an assembly, the front-end | tip of each fixing pin 35-38 has comprised the straight form. .

The lens frame 5 is a driven body that can reciprocate up and down along the axial direction with respect to the module frame 4.
As shown in FIG. 3, the lens frame 5 is formed in a substantially cylindrical shape as a whole. The lens frame 5 is a cylindrical member that holds a lens unit (not shown) in which a lens or a lens group is held inside a lens barrel. A female screw (not shown) formed on the inner peripheral surface of the lens frame 5 The lens unit is mounted on the inner side of the lens frame 5 by screwing a male screw formed on the outer peripheral surface of the lens barrel of the lens unit.

  The lens frame 5 is provided with first to fourth projecting portions 51, 52, 53, 54 extending radially outward from the cylindrical portion 50 at intervals of 90 degrees in the circumferential direction. The first protruding portion 51 (overhang portion) is housed inside the first guide portion 31 of the module frame 4, and a part of the first protruding portion 51 protrudes radially outward from the module frame 4. The third protrusion 53 and the fourth protrusion 54 are accommodated in the second guide part 32, the third guide part 33, and the fourth guide part 34 of the module frame 4, respectively.

The first projecting portion 51 includes a base portion 55 accommodated inside the first guide portion 31 of the module frame 4 and a head portion 56 extending further outward in the radial direction from the base portion 55.
The base portion 55 includes a pedestal portion 57 that extends upward and downward along the axial direction from the cylindrical portion 50, and the upper end surface of the pedestal portion 57 extends upward from the upper end surface along the axial direction. A pair of fixing pins 58, 58 projecting side by side in the circumferential direction (see FIGS. 8 and 9), and the lower end surface of the pedestal portion 57 extends downward from the lower end surface along the axial direction. A pair of fixing pins 59, 59 projecting in the circumferential direction is provided (see FIG. 10).

The head portion 56 protruding radially outward from the base portion 55 is disposed so as to straddle the bridge portion 25 of the module frame 4 from above. In the head portion 56, which protrudes radially outward from the bridge portion 25, a leg portion 61 that extends downward along the axial direction, and a leg portion 61 that protrudes further radially outward and extends obliquely downward. A hook portion 62 is formed. The hook portion 62 is a portion that hooks the intermediate portion of the SMA wire 12.
Further, a substantially cylindrical coil guide pin 63 that protrudes upward along the axial direction protrudes from the upper end surface of the head portion 56. The coil spring 13 is disposed outside the coil guide pin 63, and the urging force of the coil spring 13 is applied to the lens frame 5 via the head 56.

The upper end surface of the second projecting portion 52 accommodated inside the second guide portion 32 of the module frame 4 is formed as a flat surface that is one step higher in the radial direction than in the radial direction, and is one step higher in the radial direction. A portion of the flat surface is a portion 64 on the upper side. The lower portion of the upper end surface of the second projecting portion 52 that is lower in the radial direction than the upper contact portion 64 is a low ground portion 65 that is substantially flush with the upper end surface 50 a of the cylindrical portion 50.
In addition, a protrusion 66 extending upward along the axial direction protrudes from the upper end surface 50 a of the cylindrical portion 50 located radially inward of the second protrusion 52, and the circumferential direction of the protrusion 66 Both end portions project upward from the circumferential intermediate portion.
In addition, a protrusion 72 that protrudes downward along the axial direction protrudes from the lower end surface of the cylindrical portion 50 located on the radially inner side of the second protrusion 52.

  The upper end surface of the third projecting portion 53 accommodated inside the third guide portion 33 of the module frame 4 is a flat surface that is one step higher than the upper end surface 50 a of the cylindrical portion 50, and serves as an upper degree contact portion 67. ing. Further, the lower end surface of the third projecting portion 53 is flush with the lower end surface of the cylindrical portion 50. As shown in FIG. A lower contact portion 68 extending downward along the projection is provided.

The upper end surface of the fourth projecting portion 54 accommodated inside the fourth guide portion 34 of the module frame 4 is formed as a flat surface that is one step higher in the radial direction than in the radial direction, as shown in FIG. The portion of the flat surface that is one step higher in the radial direction is a portion 69 on the upper side. The lower portion of the upper end surface of the fourth projecting portion 54 that is lower in the radial direction than the upper side contact portion 69 is a low ground portion 70 that is lower than the upper end surface 50 a of the cylindrical portion 50.
Further, the lower end surface of the fourth projecting portion 54 is flush with the lower end surface of the cylindrical portion 50, and from the lower end surface on the radially outer side of the fourth projecting portion 54 in the axial direction, as shown in FIG. A lower side contact portion 71 extending downward along the projection is provided.

  In addition, the lens frame 5 is shape | molded with the thermoplastic resin which can carry out heat crimping or ultrasonic crimping, for example, a polycarbonate (PC), a liquid crystal polymer (LCP) resin, etc. In FIG. 3, the tips of the fixing pins 58 and 59 are shown in a form after heat caulking, but the tips of the fixing pins 58 and 59 have a straight shape in the state of the parts before assembly. .

The first power supply member 6 and the second power supply member 7 are members fixed to the upper end surface of the module frame 4 to support the end portion of the SMA wire 12 and supply electricity to the SMA wire 12.
The first power supply member 6 is a flat plate-like fixing portion 81 placed on the upper upper end surface 26 of the module frame 4 and bends approximately 90 degrees downward from the fixing portion 81 and extends downward along the axial direction. And a wire holding portion 83 that bends approximately 90 degrees upward from the fixed portion 81 and extends upward along the axial direction.

  As shown in FIG. 8, the fixing portion 81 is formed so as to overlap the upper upper end surface 26 from the corner portion 28 to the corner portion 29 of the module frame 4, and the second guide portion 32 and the second guide portion 32 in the module frame 4. 3 The shape which closes the upper part of the guide part 33 is comprised. The portion of the fixed portion 81 that covers the upper side of the second guide portion 32 corresponds to the degree that the upper side contact portion 64 of the second protrusion 52 in the lens frame 5 hits when the lens frame 5 moves upward along the axial direction. It is a receiving part 84. Further, the portion of the fixed portion 81 that covers the upper portion of the third guide portion 33 is abutted by the upper contact portion 67 of the third protrusion 53 in the lens frame 5 when the lens frame 5 moves upward along the axial direction. It is a receiving portion 85 per degree.

The contact receiving portion 84 of the fixing portion 81 has a contact receiving portion 84 so as not to interfere with the protrusion 66 provided in the vicinity of the upper contact receiving portion 64 when the lens frame 5 moves up and down along the axial direction. The inner edge dimension in the radial direction is set. An edge portion (hereinafter referred to as an inner edge portion) on the radially inner side of the receiving portion 84 is located above the low ground portion 65 of the lens frame 5.
In the fixing portion 81, pin insertion holes 86 through which the three fixing pins 35 provided on the upper upper end surface 26 of the module frame 4 are inserted are provided at corresponding positions.

As shown in FIGS. 4, 8, and 9, the connection terminal portion 82 is disposed along the portion adjacent to the corner portion 28 in the side wall portion 22 of the module frame 4, and is formed on the outer edge portion of the module lower plate 11 to be described later. The fitting groove 11 f is formed, and the lower end of the connection terminal portion 82 projects downward from the module lower frame 11.
The wire holding portion 83 is disposed above a portion adjacent to the corner portion 29 in the side wall portion 24 of the module frame 4. The distal end portion of the wire holding portion 83 is folded and clamped with one end portion of the SMA wire 12 interposed therebetween, thereby holding the end portion of the SMA wire 12.

  The second power supply member 7 is a flat plate-like fixing portion 87 placed on the lower upper end surface 27 of the module frame 4, and bends approximately 90 degrees downward from the fixing portion 87 and extends downward along the axial direction. And a wire holding part 89 that is bent approximately 90 degrees upward from the fixed part 87 and extends upward along the axial direction.

  As shown in FIG. 8, the fixing portion 87 has a shape that closes the upper side of the fourth guide portion 34 in the module frame 4. In the fixing portion 87, the portion covering the upper portion of the fourth guide portion 34 is such that when the lens frame 5 moves upward along the axial direction, the upper contact portion 69 of the fourth protrusion 54 in the lens frame 5 abuts. The contact receiving unit 90 is provided. An edge portion (hereinafter referred to as an inner edge portion) on the inner side in the radial direction of the receiving portion 90 is located above the low ground portion 70 of the lens frame 5.

In the fixing portion 87, pin insertion holes 91 through which the two fixing pins 36 provided on the lower upper end surface 27 of the module frame 4 are inserted are provided at corresponding positions.
The second power supply member 7 inserts the fixing pin 36 of the module frame 4 into the pin insertion hole 91 of the fixing portion 87, and crimps the tip end portion of the fixing pin 36 protruding from the pin insertion hole 91, whereby the module frame 4 Fixed to.

  As shown in FIGS. 4, 8, and 9, the connection terminal portion 88 is disposed along a portion of the side wall portion 22 of the module frame 4 that is adjacent to the corner portion 30, and is provided on an outer edge portion of the module lower plate 11 to be described later. It is fitted in the formed fitting groove 11g, and the lower end of the connection terminal portion 88 projects downward from the module lower frame 11.

The wire holding portion 89 is disposed above a portion adjacent to the corner portion 30 in the side wall portion 23 of the module frame 4. The distal end portion of the wire holding portion 89 is folded and crimped across the other end portion of the SMA wire 12 to hold the end portion of the SMA wire 12.
Note that the wire holding portion 83 of the first power supply member 6 and the wire holding portion 89 of the second power supply member 7 are high from the module lower plate 11 when assembled as the drive unit 2 shown in FIGS. Are sized so that the heights are substantially the same.

  The insulating sheet 9 is an insulating member that is disposed on the first power supply member 6 and that electrically insulates the upper sheet spring 8 that is disposed thereon. The insulating sheet 9 has a shape that overlaps the receiving portion 84 per degree of the first power supply member 6, and a pin through which the two fixing pins 35 provided in the vicinity of the corner portion 28 on the upper upper end surface 26 of the module frame 4 are inserted. An insertion hole 9a is provided. The insulating sheet 9 has a radially inner edge dimension of the insulating sheet 9 so as not to interfere with the protrusion 66 of the lens frame 5 when the lens frame 5 moves up and down along the axial direction.

  The upper leaf spring 8 and the lower leaf spring 10 are flat plate springs that support the lens frame 5 on the module frame 4 so as to be movable up and down along the axial direction, and have a substantially annular shape (ring shape) in plan view. For example, it is comprised from metal plates, such as a stainless steel (SUS) steel plate.

  As shown in FIG. 9, the upper leaf spring 8 is disposed above the module frame 4, the lens frame 5, the first power supply member 6, and the second power supply member 7. The upper leaf spring 8 is provided with a pin insertion hole 8a through which two fixing pins 35 provided in the vicinity of the corner portion 28 in the upper upper end surface 26 of the module frame 4 are inserted on one side opposed in the radial direction. A pin insertion hole 8b through which two fixing pins 58 protruding upward from the upper end surface of the pedestal portion 57 of the lens frame 5 are provided. Further, the upper leaf spring 8 includes a backing portion 8c having a shape and a size overlapping the receiving portion 84 and the insulating sheet 9 per degree of the first power supply member 6 between the two pin insertion holes 8a, 8a. Yes. The backing portion 8c has a radial inner edge dimension of the backing portion 8c so that it does not interfere with the projection 66 of the lens frame 5 when the lens frame 5 moves up and down along the axial direction. .

  One radial direction side of the first power supply member 6, the insulating sheet 9, and the upper leaf spring 8 is fastened together by two fixing pins 35 of the module frame 4 in a stacked state and fixed to the module frame 4. That is, of the three fixing pins 35 protruding from the upper upper end surface 26 of the module frame 4, the two fixing pins 35 provided in the vicinity of the corner portion 28 are provided in the vicinity of the connection terminal portion 82 in the first power supply member 6. The pin insertion hole 86, the pin insertion hole 9 a of the insulating sheet 9, and the pin insertion hole 8 a on one side in the radial direction of the upper leaf spring 8 are inserted, and the distal end portion of the fixing pin 35 protruding from the upper leaf spring 8 is crimped. Thereby, the 1st electric power feeding member 6, the insulating sheet 9, and the upper leaf | plate spring 8 are fastened together. The first power supply member 6 includes a wire holding portion in the first power supply member 6 in which the remaining one fixing pin 35 (fixed pin 35 provided in the vicinity of the corner 29) protruding from the upper upper end surface 26 of the module frame 4 is provided. The module is also fixed to the module frame 4 by being inserted into the pin insertion hole 86 in the vicinity of 83 and crimping the tip of the fixing pin 35.

  A fixing pin 58 protruding upward from the pedestal portion 57 of the first protrusion 51 in the lens frame 5 is inserted into the pin insertion hole 8 b on the other radial side of the upper leaf spring 8. Is connected to the other radial side of the upper leaf spring 8 and the first protrusion 51 of the lens frame 5.

  As shown in FIG. 10, the lower leaf spring 10 is disposed below the module frame 4 and the lens frame 5. The lower leaf spring 10 is provided with a pin insertion hole 10a through which the two fixing pins 38 provided on the lower end surface 39 in the vicinity of the corner 28 in the module frame 4 are inserted on one side opposed in the radial direction. In addition, a pin insertion hole 10 b is provided through which two fixing pins 59 protruding downward from the lower end surface of the pedestal portion 57 of the lens frame 5 are inserted.

  In the lower leaf spring 10, two fixing pins 38 protruding downward from the lower end surface 39 of the module frame 4 are inserted into the pin insertion hole 10 a on one side in the radial direction, and the tip of the fixing pin 38 is swaged. The one side in the radial direction of the lower leaf spring 10 is fixed near the corner 28 of the module frame 4.

A fixing pin 59 protruding downward from the pedestal 57 of the first protrusion 51 in the lens frame 5 is inserted into the pin insertion hole 10 b on the other radial side of the lower leaf spring 10. Is connected to the other radial side of the lower leaf spring 10 and the first protrusion 51 of the lens frame 5.
The lower leaf spring 10 and the module frame 4 are dimensioned so as not to interfere with each other when the lens frame 5 moves upward along the axial direction.

  The module lower frame 11 is formed of a resin material having electrical insulation and light shielding properties, and the outer shape thereof is formed in a substantially rectangular shape in plan view that is slightly larger than the outer shape of the module frame 4 as shown in FIG. ing. The module lower plate 11 is formed in a ring shape as a whole, and a circular opening 11a in a plan view is formed in the center of the module lower plate 11 so that a lens unit (not shown) can be taken in and out.

  Through holes 11b into which three fixing pins 37 on the lower side of the module frame 4 are inserted are formed in three corners among the four corners of the module lower plate 11. Further, the upper surface 11 c of the module lower plate 11 has a recess 11 d for avoiding interference with the lower two fixing pins 38 provided on the module frame 4 in order to fix the lower plate spring 10 to the module frame 4. And a recess 11e for avoiding interference with the lower two fixing pins 59 provided on the lens frame 5 in order to connect the lower leaf spring 10 to the lens frame 5.

Also, the outer edge of one of the four sides of the module lower plate 11 is fitted into the fitting groove 11f into which the end portions of the connection terminal portions 82 and 88 of the first power supply member 6 and the second power supply member 7 are inserted. , 11 g are formed.
As shown in FIG. 6, the upper surface 11 c of the module lower plate 11 is formed such that when the lens frame 5 moves downward in the axial direction, the leg portions 61 of the lens frame 5, the protrusions 72, and the tips of the lower contact portions 68 and 71. The lens frame 5 functions as a restricting member that restricts further downward movement of the lens frame 5.
Further, the lower surface of the module lower plate 11 functions as a reference mounting surface when the drive module 1 is mounted.
The module frame 4 is fixed to the module lower plate 11 by inserting the three fixing pins 37 on the lower side of the module frame 4 into the through holes 11b of the module lower plate 11 and crimping the tip end portions of the fixing pins 37, respectively. Is done.

  The SMA wire 12 is a wire that contracts and deforms due to heat generation during energization. Both ends of the SMA wire 12 are held by the wire holding portion 83 of the first power supply member 6 and the wire holding portion 89 of the second power supply member 7, and the lens. It is latched from below by the hook portion 62 of the frame 5, is disposed above the upper end surfaces of the two side wall portions 23, 24 connected to the bridge portion 25 in the module frame 4, and is bent in a substantially V shape. .

The cover 3 is made of resin and has a rectangular shape with a top as shown in FIG. The cover 3 has a size that can accommodate the drive unit 2 on the inside, and is formed in an internal shape that does not prevent the lens frame 5 from reciprocating in the vertical direction along the axial direction.
In the center of the top wall portion 101 of the cover 3, a circular opening 102 having a size that allows a lens unit (not shown) to be taken in and out is formed.

As shown in FIG. 6, one end of the coil spring 13 is accommodated on the inner surface side of the top wall portion 101 of the cover 3, and the head of the lens frame 5 is moved when the lens frame 5 is moved upward in the axial direction. In order to avoid interference with the coil guide pin 63 provided at 56, a coil accommodation hole 103 is provided.
Furthermore, on the inner surface side of the top wall portion 101 of the cover 3, when the assembly of the drive module 1 is completed, the abutting portion 104 that contacts the backing portion 8 c of the upper leaf spring 8 and the second power supply member 7 are provided. An abutting portion 105 (see FIG. 7) that abuts against the contact receiving portion 90 and an abutting portion (not shown) that abuts against the receiving portion 85 per contact of the first power supply member 6 are provided.

  As shown in FIG. 6, the coil spring 13 has a coil guide pin 63 of the head portion 56 of the lens frame 5 inserted therein, one end abutted against the head portion 56, and the other end accommodated in the coil of the cover 3. The lens frame 5 is urged downward in the axial direction relative to the module frame 4 by being inserted into the hole 103 and abutting against the top wall portion 101 of the cover 3.

<Assembly method of drive module 1>
Next, a method for assembling the drive module 1 will be described.
First, the lens frame 5 is inserted through an opening on the upper side of the module frame 4 (in other words, on the side far from the reference position described later) and moved downward (in other words, in a direction approaching the reference position), thereby moving the lens frame 5. Is housed inside the module frame 4. At that time, the head portion 56 of the lens frame 5 is straddled over the bridge portion 25 of the module frame 4, and the leg portion 61 and the hook portion 62 are disposed on the radially outer side than the bridge portion 25.

  Next, the fixing portion 87 of the second power feeding member 7 is placed on the lower upper end surface 27 of the module frame 4, and the two fixing pins 36 of the module frame 4 are respectively inserted into the pin insertion holes 91 of the second power feeding member 7. Then, the second power feeding member 7 is fixed to the module frame 4 by crimping the tip of the fixing pin 36.

  Next, the fixing portion 81 of the first power feeding member 6 is placed on the upper upper end surface 26 of the module frame 4, and the three fixing pins 35 of the module frame 4 are respectively pinned to the first power feeding member 6. Insert through the insertion hole 86. Further, the insulating sheet 9 was placed on the contact receiving portion 84 in the fixing portion 81 of the first power supply member 6 and the two pin insertion holes 86 on the connection terminal portion 82 side of the first power supply member 6 were inserted. The two fixing pins 35 are inserted into the pin insertion holes 9 a of the insulating sheet 9. Further, while placing the upper leaf spring 8 above the lens frame 5, the backing portion 8 c of the upper leaf spring 8 is placed on the insulating sheet 9, and the two fixing pins 35 are respectively placed on the upper leaf spring 8. Is inserted into the pin insertion hole 8a. Then, the first feeding member 6, the insulating sheet 9, and the upper leaf spring 8 are fixed to the module frame 4 by crimping the tips of the three fixing pins 35.

  That is, the first power supply member 6 is fixed by crimping the tip portions of the two fixing pins 35 inserted through the pin insertion holes 86, 9 a, 8 a of the first power supply member 6, the insulating sheet 9, and the upper leaf spring 8. The end portion on the receiving portion 84 side in the portion 81, the insulating sheet 9, and the end portion on the backing portion 8 c side in the upper leaf spring 8 are stacked and fixed to the module frame 4 together. Further, the end of the fixing portion 81 of the first power supply member 6 on the wire holding portion 83 side is secured by crimping the tip of the fixing pin 35 inserted through the pin insertion hole 86 in the vicinity of the wire holding portion 83 of the first power supply member 6. The part is fixed to the module frame 4.

  Next, the two fixing pins 58 provided on the first projecting portion 51 of the lens frame 5 are respectively inserted into the pin insertion holes 8b of the upper leaf spring 8, and the distal ends of the fixing pins 58 are swaged to form the lens frame. 5 and the upper leaf spring 8 are connected.

  Next, the lower leaf spring 10 is arranged on the lower side of the module frame 4, and the two fixing pins 38 protruding from the lower surface of the module frame 4 are inserted into the pin insertion holes 10 a of the lower leaf spring 10, respectively. The lower leaf spring 10 is fixed to the module frame 4 by caulking the tip.

Next, the two fixing pins 59 provided in the first projecting portion 51 of the lens frame 5 are respectively inserted into the pin insertion holes 10b of the lower leaf spring 10, and the distal end portions of the fixing pins 59 are crimped, so that the lens frame 5 And the lower leaf spring 10 are coupled.
As a result, the lens frame 5 moves up and down along the axial direction with respect to the module frame 4 while being cantilevered and supported by the module frame 4 via the upper leaf spring 8 and the lower leaf spring 10 from both the upper and lower sides. Installed as possible. Even when the lens frame 5 moves in the vertical direction, the leg portion 61 and the hook portion 62 of the lens frame 5 are kept at positions radially outside the bridge portion 25.

  Next, the fixing pins 37 protruding downward from the three corners 28, 29, and 30 of the module frame 4 are inserted into the through holes 11b of the module lower plate 11, respectively, and the tips of the fixing pins 37 are crimped. The module frame 4 is fixed to the module lower plate 11.

Next, the SMA wire 12 is fixed. Specifically, with the intermediate portion of the SMA wire 12 hooked on the hook portion 62 formed on the head portion 56 of the lens frame 5 from below, the end portions of the SMA wire 12 are respectively connected to the first feeding member 6 and the second feeding member 6. The wire holding portions 83 and 89 of the power supply member 7 are appropriately wound around. At that time, it is performed while adjusting the tension so that the SMA wire 12 has a predetermined tension. And each wire holding part 83 and 89 is crimped, and the both ends of the SMA wire 12 are fixed.
Next, the coil spring 13 is extrapolated outside the coil guide pin 63 provided on the head portion 56 of the lens frame 5. Thereby, it will be in the state shown in FIG. 4, FIG. 5, and the assembly of the drive unit 2 will be completed.

  Next, the cover 3 is put on the drive unit 2, the lower edge of the cover 3 is placed on the outer peripheral edge of the module lower plate 11, and the cover 3 is fixed to the module lower plate 11 by adhesion or the like. Thereby, the assembly of the drive module is completed, and the drive module 1 shown in FIG. 1 is completed.

  When the drive module 1 is mounted, an adapter (not shown) can be attached to the lower surface of the module lower plate 11 and can be mounted on a control board (not shown) via the adapter. For mounting on the control board, an appropriate fixing means such as adhesion or fitting can be adopted.

<Operation of Drive Module 1>
Next, the operation of the drive module 1 will be described.
In a non-energized state where no electricity is supplied to the connection terminal portions 82 and 88 of the first power supply member 6 and the second power supply member 7, the spring force of the upper leaf spring 8, the lower leaf spring 10, and the coil spring 13 is applied to the lens frame 5. As a result, the lens frame 5 is pressed downward mainly by the urging force of the coil spring 13. At this time, the downward movement of the lens frame 5 is regulated by the module lower plate 11, and the tips of the leg portion 61, the protrusion 72, and the lower contact portions 68, 71 of the lens frame 5 are the upper surface of the module lower plate 11. Stop when it hits 11c. Even if the SMA wire 12 contracts due to the ambient temperature due to the action of the coil spring 13, the lens frame 5 can be prevented from being lifted, and the lens frame 5 is driven to a reference position for driving (hereinafter referred to as non-energization). (Referred to as a reference position at the time).
As shown in FIG. 6, when the lens frame 5 is positioned at the reference position when no power is supplied, the dimensions of the respective parts are set in advance so that a predetermined gap is formed between the bridge part 25 and the first projecting part 51. Is set.

  Next, when standby power is supplied to the connection terminal portions 82 and 88 of the pair of power supply members 6 and 7, the SMA wire 12 generates heat at a predetermined temperature and contracts. As a result, the lens frame 5 moves upward and stops at a predetermined position (standby position) where the tension of the SMA wire 12 and the urging forces of the upper leaf spring 8, the lower leaf spring 10, and the coil spring 13 are balanced.

Subsequently, when driving power is supplied to the power supply members 6 and 7, the SMA wire 12 generates heat and expands and contracts according to the amount of power. Accordingly, the lens frame 5 can be moved upward to a position where the tension of the SMA wire 12 and the urging forces of the upper leaf spring 8, the lower leaf spring 10, and the coil spring 13 are balanced.
That is, when electric power is supplied to the power supply members 6 and 7, current flows through the SMA wire 12, Joule heat is generated, and the temperature of the SMA wire 12 rises. When the temperature of the SMA wire 12 exceeds the transformation start temperature, the SMA wire 12 contracts to a length corresponding to the temperature. Both end portions of the SMA wire 12 are respectively held by the wire holding portions 83 and 89 of the pair of power supply members 6 and 7 positioned above the upper end surface of the module frame 4, and an intermediate portion of the SMA wire 12 is held by the lens frame 5. Since the hook portion 62 is engaged, an upward force (driving force) acts on the hook portion 62 due to the contraction of the SMA wire 12, and the lens frame 5 moves upward along the axial direction.

  When the lens frame 5 moves, the upper plate spring 8, the lower plate spring 10, and the coil spring 13 are deformed, and an elastic restoring force corresponding to the amount of deformation acts on the lens frame 5. The movement of the lens frame 5 stops at a position where this elastic restoring force is balanced with the tension of the SMA wire 12. Then, by adjusting the amount of power supplied to the power supply members 6 and 7 and controlling the amount of heat generated by the SMA wire 12, the lens frame 5 can be moved in the vertical direction and stopped at a predetermined position.

  According to the drive module configured as described above, the head portion 56 of the first projecting portion 51 of the lens frame 5 straddling the bridge portion 25 of the module frame 4 is away from the reference position when no power is supplied to the bridge portion 25. When the drive module 1 is assembled as described above, the lens frame 5 is placed on the upper side of the module frame 4 (in other words, on the side far from the reference position). The lens frame 5 can be accommodated inside the module frame 4 by moving it downward (in other words, in a direction approaching the reference position). Thus, since the workability is better when the lens frame 5 is set from the upper side of the module frame 4 than when the lens frame 5 is set from the lower side of the module frame 4, productivity is improved.

  In addition, since the head 56 of the first projecting portion of the lens frame 5 is disposed above the bridge portion 25, the interference with the head 56 is taken into account in setting the radial thickness of the bridge portion 25. Therefore, the thickness of the bridge portion 25 in the radial direction can be reduced. As a result, the inner diameter dimension of the lens frame 5 can be increased without increasing the outer dimension of the drive module 1, and the outer diameter of a lens unit (not shown) mounted inside the lens frame 5 can be increased. . Therefore, the outer diameter of the lens group of the lens unit can be increased.

  In this drive module 1, when the lens frame 5 moves upward along the axial direction, the upper contact portion 64 of the second protrusion 52 of the lens frame 5 is received from the lower portion of the first power supply member 6. 84, the upper protrusion portion 67 of the third projecting portion 53 contacts the receiving portion 85 of the first feeding member 6 from below, and the upper contact portion 69 of the fourth projecting portion 54 from the lower second feeding member. Since it hits the receiving portion 90 per 7 degrees, the upward movement range of the lens frame 5 relative to the module frame 4 can be limited.

  In addition, an insulating sheet 9 and a backing portion 8c of the upper leaf spring 8 are laminated on the receiving portion 84 per contact of the first power supply member 6, and the upper surface of the backing portion 8c has a protrusion of the cover 3 thereon. The abutting portion 104 abuts, and the abutting portion (not shown) of the cover 3 abuts on the upper surface of the receiving portion 85 per degree of the first power supply member 6. Since the abutting portion 105 of the cover 3 is in contact with the upper surface of the receiving portion 90, for example, when the drive module 1 is dropped, the contact portions 64, 67, and 69 of the lens frame 5 are respectively in degrees. Even when strongly hitting the contact receiving portions 84, 85, and 90, the contact portions 84, 85, and 90 are received by the inner surface of the cover 3, so that deformation of the contact portions 84, 85, and 90 is prevented. The first power supply member 6 and It is possible to prevent damage to the second feed member 7.

  Further, a low ground portion 65 is provided on the second projecting portion 52 of the lens frame 5 on the radially inner side of the contact portion 64, and an inner edge portion of the contact portion 84 of the first power supply member 6 above the low ground portion 65. Therefore, when the contact portion 64 of the second projecting portion 52 of the resin lens frame 5 hits the contact portion 84 of the first feeding member 6 made of metal, the contact amount made of metal Since the inner edge part of the receiving part 84 is located on the low ground part 65 with a gap, the inner edge part of the receiving part 84 does not come into contact with the lens frame 5 made of resin. Therefore, the lens frame 5 is not scraped by the inner edge portion of the receiving portion 84.

  The low ground portion 70 provided on the inner side in the radial direction of the contact portion 69 in the fourth projecting portion 54 of the lens frame 5 also acts in the same manner. That is, when the contact portion 69 of the fourth protrusion 54 of the resin lens frame 5 hits the contact portion 90 of the metal second power supply member 7, the inner edge of the metal reception portion 90 Since the portion is positioned on the low-ground portion 70 with a gap, the inner edge portion of the receiving portion 90 does not contact the lens frame 5 made of resin. Therefore, the lens frame 5 is not scraped by the inner edge portion of the receiving portion 90 per unit.

  In the drive module 1, one side of the upper leaf spring 8 and the lower leaf spring 10 that are opposed in the radial direction is connected to the upper and lower end surfaces of the module frame 4, and the other side that is opposed to the one side in the radial direction is connected to the lens frame 5. As a result, the lens frame 5 can be moved in the axial direction while being cantilevered by the module frame 4, so that the upper leaf spring 8 and the lower leaf spring 10 are formed in a very simple annular shape. Can do. Further, only a part of the upper plate spring 8 and the lower plate spring 10 in the circumferential direction (the other side) is connected to the lens frame 5, so that the upper plate spring 8 and the lower plate spring 10 in the lens frame 5 The connecting portion of the lens frame 5 can be reduced, and the inner diameter dimension of the lens frame 5 can be relatively increased. As a result, the outer diameter of a lens unit (not shown) mounted inside the lens frame 5 can be increased, and the outer diameter of the lens group of the lens unit can be increased.

  In this drive module 1, the upper leaf spring 8 and the lower leaf spring 10 are coupled to the first protrusion 51 having the hook portion 62 on which the driving force by the SMA wire 12 acts on the lens frame 5. The posture of the lens frame 5 when moving along the axial direction can be stabilized, and smooth movement becomes possible.

  In this drive module 1, the upper upper end surface 26 and the lower upper end surface 27 are formed on the upper end surface of the module frame 4 so as to have a difference in level, and the first feeding member is formed on the upper upper end surface 26. 6 is mounted in a state where the fixing portion 81, the insulating sheet 9, and the upper leaf spring 8 are laminated, and the fixing portion 87 of the second feeding member 7 is placed on the lower upper end surface 27. The member 6 and the second power supply member 7 can be attached with a difference in height so that the second power supply member 7 and the upper leaf spring 8 do not come into contact with each other even when the lens frame 5 moves along the axial direction. can do. As a result, an insulating material becomes unnecessary between the second power supply member 7 and the upper leaf spring 8, and the insulating member can be reduced. Note that the insulating sheet 9 disposed between the first power supply member 6 and the upper plate spring 8 has the upper plate spring 8 in the event that the second power supply member 7 and the upper plate spring 8 are in contact with each other beyond the assumption. This is a safety measure for preventing the first power supply member 6 and the second power supply member 7 from being short-circuited.

  In the drive module 1, the first feeding member 6, the insulating sheet 9, and the upper leaf spring 8 are clamped at the tip ends of the two fixing pins 35 inserted through the pin insertion holes 86, 9 a, 8 a, thereby 1 The end portion on the receiving portion 84 side of the fixing portion 81 of the power supply member 6, the insulating sheet 9, and the end portion on the backing portion 8 c side of the upper leaf spring 8 are stacked together and fastened to the module frame 4. Therefore, the number of parts can be reduced by reducing the number of parts and the number of assembling steps can be reduced by using a common fixing pin, and the cost can be reduced.

By the way, in 1st Embodiment, the fixing pin 35 of the module frame 4 is inserted in the pin insertion hole 8a of the upper leaf | plate spring 8, and the one end side of the upper leaf | plate spring 8 is module-mounted by crimping the front-end | tip of the fixing pin 35. The upper end surface 26 of the frame 4 is fixed. In this case, since the crushed portion (hereinafter referred to as caulking portion) of the fixing pin 35 fixes one end side of the upper plate spring 8, the upper plate spring 8 extends to the other side in the radial direction from the caulking portion. Only the portion substantially functions as a spring member. That is, the substantial spring length of the upper leaf spring 8 is the length of the portion located on the other end side of the caulking portion.
Here, in order to make the substantial spring length of the upper leaf spring 8 always constant, the caulking portion is always formed in the same shape and the same size when the tip of the fixing pin 35 is crimped (for example, Ideally, there should be no gap between the caulked portion and the upper leaf spring 8 as shown in FIGS. However, in reality, the shape and size of the caulking portion are not constant, and there may be a gap between the caulking portion and the upper leaf spring 8. Thus, if the shape and size of the caulking portion is not constant, or if a gap is generated between the caulking portion and the upper leaf spring 8, the substantial spring length of the upper leaf spring 8 depends on the individual drive module 1. Due to the variation, the spring constant of the upper leaf spring 8 varies depending on the individual drive modules 1.

  In this drive module 1, the lens is positioned at a position where the tension of the SMA wire 12 and the urging force of the upper leaf spring 8, the lower leaf spring 10, and the coil spring 13 are balanced when power for driving is supplied to the power supply members 6, 7. Since the frame 5 is stopped, if the spring constant of the upper leaf spring 8 varies depending on the individual drive modules 1, the performance of the drive modules 1 varies, resulting in a decrease in product yield. As a result, the cost may increase.

Therefore, in order to prevent variation in the substantial spring length of the upper leaf spring 8, it is preferable to provide a regulating member for making the substantial spring length of the upper leaf spring 8 always constant.
For example, as shown in FIG. 11, a restriction plate (regulation member) 95 made of a hard material (for example, a metal steel plate) that restricts the spring length is further placed on the upper plate spring 8, and the two fixing pins 35 are placed. The upper plate spring 8 is fixed to the upper upper end surface 26 of the module frame 4 by penetrating through an insertion hole previously formed in the restriction plate 95 and caulking the tip of the fixing pin 35 to form a caulking portion. To do. That is, the restricting plate 95 is disposed between the caulking portion and the upper leaf spring 8. In the embodiment shown in FIG. 11, the restriction plate 95 is formed in the same shape and the same dimensions as the insulating sheet 9, but the shape and dimensions of the restriction plate 95 are not limited to this, and can be changed as appropriate. .
In this way, the substantial spring length of the upper leaf spring 8 is determined by the restricting plate 95 and is not affected by the caulking portion, so that the substantial spring length of the upper leaf spring 8 is eliminated. Is always constant, and the spring constant of the upper leaf spring 8 can be made constant. As a result, the product yield is improved, and there is no product variation in the performance of the drive module 1.

As another method, instead of providing the regulating plate 95, as shown in FIG. 12, the cover 3 is provided with a spring pressing projection (regulating member) 106 extending downward from the inner surface of the top wall portion 101, When the lens frame 5 is positioned at the standby position described above, the tip of the spring pressing projection 106 abuts from above on a portion of the upper leaf spring 8 that is located on the other end side of the caulking portion of the fixing pin 35. May be.
In this way, the substantial spring length of the upper leaf spring 8 is the length of the portion located on the other end side of the spring pressing protrusion 106, that is, is determined by the spring pressing protrusion 106. Since it is not necessary to be affected by the caulking portion, the substantial spring length of the upper leaf spring 8 is always constant, and the spring constant of the upper leaf spring 8 can be made constant. As a result, the product yield is improved, and there is no product variation in the performance of the drive module 1.

In the first embodiment described above, the upper plate spring 8 is caulked and fixed to the upper upper end surface 26 of the module frame 4. However, the fixing means for the upper plate spring 8 is not limited to caulking, and may be bonded by an adhering means. It is also possible to fix. When the upper leaf spring 8 is fixed to the upper upper end surface 26 of the module frame 4 by bonding, the tips of the fixing pins 35 and 36 are used as positioning pins without crimping, and the lower upper end surface 27 of the module frame 4 is used. The fixing portion 87 of the second power supply member 7 is bonded and fixed to the upper upper end surface 26 of the module frame 4, and the fixing portion 81 of the first power supply member 6 is bonded and fixed to the receiving portion 84 per contact of the first power supply member 6. The insulating sheet 9 is bonded and fixed, and the backing portion 8 c of the upper leaf spring 8 is bonded and fixed to the insulating sheet 9.
In this way, since the substantial spring length of the upper leaf spring 8 is determined by the insulating sheet 9, the substantial spring length of the upper leaf spring 8 is always constant, and the spring constant of the upper leaf spring 8 is constant. Can be made constant. As a result, the product yield is improved, and there is no product variation in the performance of the drive module 1.

  If the backing portion 8 c of the upper plate spring 8 is directly bonded to the receiving portion 84 of the first power supply member 6 without providing the insulating sheet 9, the upper plate spring 8 is connected to the first power supply member 6. Only the portion extending to the other side in the radial direction from the edge portion of the bonding surface with the first plate 8 functions substantially as a spring member of the upper leaf spring 8, so the position of the edge portion of the bonding surface with the first power supply member 6 As a result, the substantial spring length of the upper leaf spring 8 changes, and the spring constant of the upper leaf spring 8 varies depending on the individual drive modules 1. However, when the insulating sheet 9 is provided between the upper plate spring 8 and the first power supply member 6 and the entire surface of the insulating sheet 9 is bonded to the upper plate spring 8, the edge of the bonding surface between the upper plate spring 8 and the insulating sheet 9 is obtained. Since the portion is always constant (that is, the edge of the insulating sheet 9), the spring constant of the upper leaf spring 8 can be made constant. Therefore, as described above, the product yield is improved, and the performance of the drive module 1 is not varied.

  When the upper leaf spring 8 is fixed to the upper upper end surface 26 of the module frame 4 by bonding, the insulating sheet 9 is not provided, and the inner surface of the top wall portion 101 of the cover 3 is the same as that shown in FIG. A spring pressing projection 106 is provided on the upper plate spring 8, and the tip of the spring pressing projection 106 is abutted from above on a portion of the upper plate spring 8 that is located on the other end side of the fixing pin 35. The length may be regulated.

<Second Embodiment of Drive Module>
Next, a second embodiment of the drive module according to the present invention will be described with reference to the drawings of FIGS. Note that the drive module 1 of the second embodiment differs from the drive module 1 of the first embodiment in that the shape of the upper end surface of the module frame 4, the first power supply member 6, and Since only the shape of the second power supply member 7 and the shape of the insulating sheet 9 are the same as those of the drive module 1 of the first embodiment, the same reference numerals are assigned to the same mode portions and the description thereof is omitted. Only the differences will be described below.

  The upper end surface 40 extending from the corner 29 of the module frame 4 to the corner 30 via the corner 28 in the second embodiment is formed to be flush with the higher upper end surface 26 in the first embodiment. The upper end surface 27 and the upper upper end surface 26 are flush with each other. Five fixing pins 41, 42, 43, 44, 45 protrude from the upper end surface 40. The fixing pin 41 is disposed in the vicinity of the corner portion 29, the fixing pins 42 and 43 are disposed on both sides of the second guide portion 32 in the vicinity of the corner portion 28, and the fixing pins 44 and 45 are disposed in the vicinity of the corner portion 30. It arrange | positions on both sides on both sides of the 4th guide part 34. FIG.

The first power supply member 6 and the second power supply member 7 are both placed on the upper end surface 40.
The fixing portion 81 of the first power supply member 6 includes a pin insertion hole 86 a through which the fixing pin 41 provided near the corner 29 of the module frame 4 can be inserted, and a corner near the corner 28 of the module frame 4. A pin insertion hole 86b through which the fixing pin 42 provided on the side close to 29 can be inserted is formed.
The fixing portion 87 of the second power supply member 7 extends to a position near the fixing portion 81 of the first power supply member 6 on the corner 28 when placed on the upper end surface 40 of the module frame 4. The fixing portion 87 is provided in the vicinity of the corner portion 28 of the module frame 4 and in the vicinity of the corner portion 30 of the module frame 4 and a pin insertion hole 91a through which the fixing pin 43 provided near the corner portion 30 can be inserted. Two pin insertion holes 91b and 91c into which the fixed pins 44 and 45 are inserted are formed.

As shown in FIG. 14, the first power supply member 6 has a contact portion 84 that contacts the upper degree contact portion 64 of the second protrusion 52 of the lens frame 5 and an upper portion of the third protrusion 53 of the lens frame 5. A receiving portion 85 is formed per contact with the contact portion 67.
The second power feeding member 7 is formed with a receiving portion 90 per degree when the upper degree abutting portion 69 in the fourth projecting portion 54 of the lens frame 5 abuts.
As shown in FIG. 15, the insulating sheet 9 has a shape placed from the fixing portion 81 of the first power feeding member 6 to the fixing portion 87 of the second power feeding member 7, and includes fixing pins 41, 42, 43, Four pin insertion holes 9b, 9c, 9d, 9e through which 44 can be inserted are formed.

  In the drive module 1 of the second embodiment, the first power supply member 6 and the second power supply member 7 are placed on the upper end surface 40 of the module frame 4, and the first power supply member 6 and the second power supply member 7 are placed on the top surface 40. An insulating sheet 9 is placed on the insulating sheet 9, and an upper leaf spring 8 is placed on the insulating sheet 9.

  Then, the fixing pin 41 of the module frame 4 is inserted into the pin insertion hole 86a of the first power supply member 6 and the pin insertion hole 9b of the insulating sheet 9, and the distal end portion of the fixing pin 41 is crimped, and the fixing pin 42 is supplied with the first power supply. The pin 6 is inserted into one of the pin insertion hole 86b of the member 6, the pin insertion hole 9c of the insulating sheet 9, and the pin insertion hole 8a of the upper leaf spring 8, and the distal end portion of the fixing pin 42 is swaged to fix the fixing pin 43 to the second feeding member. 7 is inserted into the other of the pin insertion hole 91a, the pin insertion hole 9d of the insulating sheet 9, and the pin insertion hole 8a of the upper leaf spring 8, and the distal end portion of the fixing pin 43 is swaged, and the fixing pin 44 is fastened to the second feeding member 7 The pin insertion hole 91b of the insulating sheet 9 and the pin insertion hole 9e of the insulating sheet 9 are inserted into the pin insertion hole 9e and the tip of the fixing pin 44 is swaged. The fixing pin 45 is inserted into the pin insertion hole 91c of the second power feeding member 7 to By caulking the tip, the first power supply member When the insulating sheet 9 and the upper plate spring 8 is secured to the module frame 4 and the second power supply member 7.

  In other words, the fixing pin 42 fixes the first power supply member 6, the insulating sheet 9, and the upper leaf spring 8 to the module frame 4 in a stacked state, and the fixing pin 43 includes the second power supply member 7 and the insulating sheet 9. And the upper plate spring 8 are fixed to the module frame 4 in a stacked state. The fixing pin 41 is fixed to the module frame 4 in a state where the first power supply member 6 and the insulating sheet 9 are laminated, and the fixing pin 44 is a state where the second power supply member 7 and the insulating sheet 9 are laminated. These are fixed to the module frame 4. Therefore, each electrode member 6, 7, insulating sheet 9 and upper leaf spring 8 can be fixed to the module frame 4 with a common fixing pin, so that the number of parts and assembly man-hours can be reduced, and the cost can be reduced. Can be reduced.

In the drive module 1 of the second embodiment, the upper end surface 40 of the module frame 4 is formed flush with each other, so the shape of the module frame 4 is simplified and the productivity of the module frame 4 is improved.
In addition, since the insulating sheet 9 is disposed between the first power supply member 6 and the second power supply member 7 and the upper leaf spring 8, it is possible to reliably prevent a short circuit between the first power supply member 6 and the second power supply member 7. can do.

Also in the drive module 1 of the second embodiment, as in the case of the first embodiment, it is possible to provide a regulating member for making the substantial spring length of the upper leaf spring 8 always constant. is there.
For example, a restriction plate 95 (see FIG. 11) similar to that of the first embodiment is placed on the upper plate spring 8, and two fixing pins 42 and 43 are formed in advance on the restriction plate 95. The upper leaf spring 8 is fixed to the upper end surface 40 of the module frame 4 by penetrating through the insertion hole and caulking the tips of the fixing pins 42 and 43 to form a caulking portion. That is, the restriction plate 95 is disposed between the caulking portions of the fixing pins 42 and 43 and the upper leaf spring 8.
In this way, the substantial spring length of the upper leaf spring 8 is determined by the restricting plate 95 and is not affected by the caulking portion, so that the substantial spring length of the upper leaf spring 8 is eliminated. Is always constant, and the spring constant of the upper leaf spring 8 can be made constant. As a result, the product yield is improved, and there is no product variation in the performance of the drive module 1.

Further, instead of providing the restricting plate 95, when the cover 3 is provided with a spring pressing projection 106 (see FIG. 12) as in the first embodiment and the lens frame 5 is positioned at the standby position described above, this spring is provided. The top end of the pressing protrusion 106 may abut against the portion of the upper leaf spring 8 located on the other end side from the caulking portions of the fixing pins 42 and 43 from above.
In this way, the substantial spring length of the upper leaf spring 8 is determined by the spring pressing projection 106 and is not affected by the caulking portion. Therefore, the spring constant of the upper leaf spring 8 can be made constant. As a result, the product yield is improved, and there is no product variation in the performance of the drive module 1.

In the second embodiment described above, the upper leaf spring 8 is caulked and fixed to the upper end surface 40 of the module frame 4, but the fixing means for the upper leaf spring 8 is not limited to caulking, and is fixed by an adhesive means. It is also possible to do. When the upper leaf spring 8 is fixed to the upper end surface 40 of the module frame 4 by bonding, the tips of the fixing pins 41 to 45 are used as positioning pins without crimping. Then, the fixed portion 81 of the first power supply member 6 and the fixed portion 87 of the second power supply member 7 are bonded and fixed to the upper end surface 40 of the module frame 4, and the fixed portion 81 of the first power supply member 6 and the second power supply member 7 are fixed. The insulating sheet 9 is bonded and fixed to the fixing portion 87, and the upper leaf spring 8 is bonded and fixed to the insulating sheet 9.
Even in this case, by providing the cover 3 with the spring pressing protrusion 106, the substantial spring length of the upper leaf spring 8 can be made constant at all times, and the spring constant of the upper leaf spring 8 can be kept constant. Can be made constant. Therefore, also in this case, the product yield is improved, and the performance of the drive module 1 is not varied.

<Electronic equipment>
Next, an embodiment of an electronic apparatus according to the present invention will be described with reference to the drawing of FIG. In the present embodiment, as an example of an electronic apparatus, a camera-equipped mobile phone including the drive module 1 of the first or second embodiment described above will be described as an example.

  FIG. 16 is an explanatory diagram of the camera-equipped mobile phone 300. FIG. 16A is an external perspective view of the front side (operation surface side) of the camera-equipped mobile phone 300. FIG. 16B is an external perspective view of the back side of the camera-equipped mobile phone 300. FIG.16 (c) is sectional drawing in CC line of FIG.16 (b). As shown in FIG. 16A, the camera-equipped mobile phone 300 according to the present embodiment includes a receiving unit 310, a transmitting unit 320, an operation unit 330, a liquid crystal display unit 340, an antenna unit 350, and not shown. And an electronic part of a well-known mobile phone such as a control circuit part of FIG.

As shown in FIG. 16B, a window 361 through which external light is transmitted is provided in the housing 360 on the back surface side on which the liquid crystal display unit 340 is provided.
As shown in FIG. 16C, the opening 102 of the cover 3 of the drive module 1 faces the window 361 of the housing 360, and the drive module 1 is installed so that the axis S is along the normal direction of the window 361. Has been. The drive module 1 is mechanically and electrically connected to the substrate 370. The substrate 370 is connected to a control circuit unit (not shown) so that power can be supplied to the drive module 1.
With this configuration, the light transmitted through the window 361 can be condensed by a lens unit (not shown) of the drive module 1 and imaged on the image sensor 380. Then, by supplying appropriate power to the drive module 1 from the control circuit unit, the lens unit can be driven in the axial direction, the focal position can be adjusted, and photographing can be performed.

As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the concrete structure is not restricted to these embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.
For example, in the above-described embodiment, an example in which the drive module 1 is used for the focal position adjustment mechanism of the lens unit has been described, but the application of the drive module 1 is not limited to this. For example, you may use for another part as an appropriate actuator which moves a to-be-driven body to a target position. For example, instead of the lens unit, a rod member or the like can be screwed, or the lens frame 6 can be changed to another shape and used as an appropriate actuator. That is, the driven body is not limited to a cylindrical member, and may be a columnar member.

In the above-described embodiment, the example of the camera-equipped mobile phone 300 has been described as the electronic device using the drive module 1, but the type of the electronic device is not limited to this. For example, it may be used in an optical device such as a digital camera or a camera built in a personal computer, or in an electronic device such as an information reading storage device or a printer, and can also be used as an actuator for moving a driven body to a target position.
Moreover, although the drive module 1 of the embodiment described above includes the coil spring 13, the present invention can be realized even if the coil spring 13 is not provided.

1 Drive module 3 Cover 4 Module frame (support)
5 Lens frame (driven body)
6 First power supply member 7 Second power supply member 8 Upper leaf spring (spring member)
8c Backing part 9 Insulating sheet 10 Lower leaf spring (spring member)
12 SMA wire (shape memory alloy wire)
25 Bridge 26 Higher top surface (first seat)
27 Lower upper end surface (second seating surface)
35, 36, 42, 43 Fixing pin 51 First protrusion (overhang)
81,87 Fixed part 84,85,90 degree per receiving part 64,67,69 per degree 65,70 Low ground part 95 Restriction plate (regulation member)
106 Spring holding projection (regulating member)
300 Mobile phone (electronic equipment)

Claims (15)

A cylindrical support, and a resin support having a bridge portion whose dimension along the axial direction is smaller than other parts,
A resin driven body that is disposed inside the support body, is accommodated so as to be movable in the axial direction of the support body, and has an overhang portion that protrudes outside the support body across the bridge portion;
A spring member that connects the support and the driven body, and supports the driven body so as to be movable in the axial direction of the support;
Arranged along the outside of the support body, locked to the overhang portion of the driven body, contracted by energization, and moved the driven body away from the reference position during non-energization along the axial direction. A shape memory alloy wire driven in the direction;
A pair of metal power supply members fixed to the support and supporting an end of the shape memory alloy wire and supplying electricity to the shape memory alloy wire;
In a drive module with
The drive module, wherein the overhang portion of the driven body is disposed on the front side in the moving direction of the driven body from the reference position with respect to the bridge portion of the support body. The power supply member includes a fixing portion that is fixed to be overlapped with an end surface of the support body on the front side in the moving direction of the driven body from the reference position, and is connected to the fixing portion and extends inward from the end surface of the support body. And a receiving part for each time
2. The drive according to claim 1, wherein the driven body is provided with a contact portion that abuts against the contact portion of the power supply member when the driven body moves in the axial direction from the reference position. module.   A low ground portion that is lower in the axial direction than the contact portion is formed in a portion that is connected to the contact portion in the driven body and that is opposed to an inner edge portion of the contact portion of the power supply member. The drive module according to claim 2.   The spring member has a ring shape, and one end is connected to the end surface on one axial side of the support body, and the other end on the opposite side in the radial direction from the one end is connected to the end surface on the one axial side of the driven body. The drive module according to any one of claims 1 to 3, wherein the drive module is provided.   The drive module according to claim 4, wherein the other end of the spring member is connected to the end face in the vicinity of an overhang portion of the driven body.   The end face of the support body on the front side in the moving direction of the driven body from the reference position in a state where the fixed portion of the pair of power supply members and the one end side of the spring member are stacked with an insulating member interposed therebetween The drive module according to claim 4, wherein the drive module is fixed to an end face of the support.   The said fixing | fixed part of the said electric power feeding member, the said insulating member, the said one end side of the said spring member, and the said end surface of the said support body are being fixed by adhesion | attachment with each lamination | stacking counterpart. Driving module.   The fixing portion of the power supply member, the insulating member, and the one end side of the spring member are penetrated by a fixing pin projecting from the end surface of the support body, and the tip of the fixing pin is inserted into the laminated portion. The drive module according to claim 6, wherein the drive module is fixed to the end face of the support by caulking.   A first seat surface on which the fixed portion of one of the pair of power supply members is placed on the end surface of the support body on the front side in the moving direction of the driven body from the reference position; A second seating surface on which the fixing portion of the other power supply member is placed, and the first seating surface and the second seating surface have a difference in height in the moving direction of the driven body. Formed on the first seating surface on the high-order side and fixed in a state where the fixing portion of the one power supply member and the one end side of the spring member are stacked, 6. The drive module according to claim 4, wherein the fixing portion of the other power feeding member is placed and fixed on the second seat surface. 6.   The first seat surface of the support body, the fixing portion of the one power feeding member, and the one end side of the spring member are fixed by bonding to the respective lamination counterparts, and the second seat surface and the other of the support body The drive module according to claim 9, wherein the fixing portion of the power supply member is fixed by adhesion.   The fixing portion of the one power supply member and the one end side of the spring member penetrate through the stacked portion, and a fixing pin protruding from the first seating surface of the support body penetrates the tip of the fixing pin. The fixing portion of the other power feeding member is fixed to the first seat surface by caulking, and a fixing pin protruding from the second seating surface of the support body passes through the fixing portion. The drive module according to claim 9, wherein the drive module is fixed to the second seat surface by caulking the tip.   The drive module according to any one of claims 9 to 11, wherein an insulating member is sandwiched between the fixed portion of the one power feeding member and the one end side of the spring member. .   The drive module according to any one of claims 6 to 12, further comprising a regulating member that regulates a spring length of the spring member. A top-covered cylindrical cover that accommodates the support, the driven body, the spring member, the shape memory alloy wire, and the power supply member;
The said spring member is provided with the backing part arrange | positioned on the said receiving part in the said electric power feeding member, and this backing part and the top inner surface of the said cover contact | abutted, It is characterized by the above-mentioned. The drive module according to claim 13.   An electronic apparatus comprising the drive module according to any one of claims 1 to 14.

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