WO2014049963A1

WO2014049963A1 - Drive device production method

Info

Publication number: WO2014049963A1
Application number: PCT/JP2013/005094
Authority: WO
Inventors: 松尾　隆; 豊年川崎; 拓真森川; 上野　修敬; 白井　孝明; 訓弘阿川; 武志角谷
Original assignee: コニカミノルタ株式会社
Priority date: 2012-09-28
Filing date: 2013-08-28
Publication date: 2014-04-03

Abstract

This drive device production method involves: sequentially assembling a plurality of electrode terminals and holding members in a terminal-holding member in which the electrode terminals are arranged and supported by a supporting member; retaining a drive body on the assembled holding members; and connecting the electrode terminals and the drive body.

Description

Method for manufacturing drive device

The present invention relates to a method for manufacturing a driving device suitably used for an imaging device that can be mounted on, for example, a mobile phone.

2. Description of the Related Art Conventionally, as a driving device suitably used for an imaging device that can be mounted on a relatively small and thin device such as a mobile phone, a driving device called a SIMDM (Smooth Impact Drive Mechanism, “SIDM” is a registered trademark). It has been known. This SIDM drive device includes a piezoelectric element that is an electromechanical conversion element, a drive main body having a drive shaft joined to one end of the piezoelectric element, and a moving body frictionally engaged with the outer periphery of the drive shaft. . In such a SIDM drive device, the expansion and contraction of the piezoelectric element is transmitted to the drive shaft, and the moving body engaged with the drive shaft with a predetermined frictional force is applied when the piezoelectric element is expanded and contracted. Drive by using the speed difference. More specifically, in such a drive device, for example, by slowly extending the drive shaft, the moving body frictionally engaged with the drive shaft is also driven and moved, while the predetermined frictional force is exceeded. When the drive shaft is instantaneously reduced, the moving body is left in the extended position. By repeatedly performing such expansion and contraction of the drive shaft, the drive device can drive the movable body in the axial direction of the drive shaft.

In such a drive device, for example, in Patent Document 1, one end of a lead wire is connected to the piezoelectric element of the drive main body, and the other end of the lead wire is soldered to a plate-like external terminal. There has been disclosed a drive device that supplies electric power to a piezoelectric element of a drive main body via a lead wire.

However, when the lead wire is connected to the piezoelectric element as in Patent Document 1, it is difficult to automate the formation of the drive device successively by automatic feeding by a parts feeder or the like. The cost will be high.

International publication WO2011 / 055504

The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a drive device manufacturing method that can be automated, is suitable for mass production, and can be manufactured at a low cost.

In the method of manufacturing the drive device according to the present invention, the electrode terminal and the holding member in the terminal holding member in which a plurality of electrode terminals are arranged and supported by the support member are sequentially assembled, and the drive main body portion is attached to the assembled holding member. The electrode terminal and the drive main body are connected. For this reason, the manufacturing method of such a drive apparatus can be automated, is suitable for mass production, and can suppress manufacturing cost low.

The above and other objects, features and advantages of the present invention will become apparent from the following detailed description and the accompanying drawings.

It is a perspective view of one embodiment of the drive device manufactured by the manufacturing method of the embodiment. It is a disassembled perspective view of the drive device shown in FIG. It is a perspective view of the drive main-body part used for the drive device shown in FIG. It is a perspective view of the holding member used for the drive device shown in FIG. It is a perspective view of the movable body main-body part used for the drive device shown in FIG. It is a top view of the mobile body main-body part shown in FIG. It is a perspective view of the guide spring used for the drive device shown in FIG. It is a top view of the guide spring shown in FIG. It is a top view in the state where the cover of the drive unit shown in FIG. 1 was removed. It is explanatory drawing of the connection part of the electrode terminal and piezoelectric element in the drive device shown in FIG. It is a perspective view of the connection state of the said mobile body main-body part and the said guide spring in the drive device shown in FIG. It is explanatory drawing at the time of connecting the said mobile body main part and guide spring in a drive device shown in FIG. 1 using a jig | tool. It is sectional drawing which abbreviate | omitted the cover of the imaging device which has a drive device shown in FIG. It is a one part perspective view of the terminal holding member of one Embodiment used for manufacture of the drive device shown in FIG. It is the top view to which the principal part of the terminal holding member shown in FIG. 14 was expanded. FIG. 15 is a perspective view of a part of a hoop-molded product formed by inserting an electrode terminal provided on the terminal holding member shown in FIG. 14 and injection-molding a holding member. It is the top view to which the principal part of the hoop molded product shown in FIG. 16 was expanded. It is a one part perspective view of the hoop molded product of the state which cut the protrusion part of the 1st connection member provided in the terminal holding member shown in FIG. It is the top view to which the principal part of the hoop molded product shown in FIG. 18 was expanded. It is the schematic which shows the flow of the manufacturing method of the drive device shown in FIG.

Hereinafter, an embodiment according to the present invention will be described with reference to the drawings. In addition, the structure which attached | subjected the same code | symbol in each figure shows that it is the same structure, The description is abbreviate | omitted suitably. In the present specification, when referring generically, it is indicated by a reference symbol without a suffix, and when referring to an individual configuration, it is indicated by a reference symbol with a suffix. In the following description, the X direction shown in FIGS. 1 to 5, 7 and 10 to 13 is the upper side, and the Y direction is the lower side.

1 to 13, the driving device 1 manufactured by the manufacturing method of the present embodiment is suitably used for an imaging device that can be mounted on, for example, a mobile phone. As shown in FIGS. 1 and 2, the drive device 1 of this embodiment includes a holding member 2, a drive main body 3 held by the holding member 2, a moving body 4, and a cover 8.

The holding member 2 is a base member that holds and supports the drive main body 3, and is formed of a resin material such as LCP (liquid crystal polymer), and as shown in FIG. It is formed by injection molding in a shape in which is inserted. The holding member 2 of this embodiment is a cylindrical body having a rectangular outer periphery and having a circular through hole 20g serving as an optical path at the center.

The holding member 2 is provided with a first support column 20a that is erected along the X direction from the upper surface (one surface) 2e of the cylindrical body at the first corner 2a on the left front side. The holding member 2 includes a drive main body holding portion 21 that holds the drive main body 3 inside the first support pillar 20a in the first corner 2a.

The drive main body holding portion 21 is formed to be recessed in a cylindrical shape with a predetermined depth from the upper surface 2e of the holding member 2.

The holding member 2 has the tip 22a of the first electrode terminal 22 and the tip 23a of the second electrode terminal 23 facing each other on both sides of the drive main body holding portion 21 at the first corner 2a. And is disposed so as to protrude above the holding member 2.

The first and

second electrode terminals

22 and 23 are each embedded in the holding member 2 at the intermediate portions thereof, and the base ends of the first and

second electrode terminals

22 and 23 are respectively external surfaces of the holding member 2. The

external connection terminals

22b and 23b are provided. And the circuit board and connector of the mobile phone which are not shown in which this drive device 1 is mounted, and these

external connection terminals

22b and 23b are mutually connected.

In this embodiment, as shown in FIG. 10, the external connection terminal 22b of the first electrode terminal 22 and the external connection terminal 23b of the second electrode terminal 23 are flush with the lower surfaces of the

external connection terminals

22b and 23b, respectively. It bends and forms through the step part. With this configuration, the external connection terminal 22b of the first electrode terminal 22 and the external connection terminal 23b of the second electrode terminal 23 can be connected to the circuit board so as to be energized, for example, by being placed on the circuit board of a mobile phone.

As shown in FIG. 4, the holding member 2 is provided with the cylinder on each of the second corner portion 2 b on the right front side, the third corner portion 2 c on the right rear side, and the fourth corner portion 2 d on the left rear side. A second support column 20b, a third support column 20c, and a fourth support column 20d are provided so as to stand up along the X direction from the upper surface (one surface) 2e of the cylindrical body. The third support pillar 20c is formed with a restricting portion receiving groove 29 for receiving a rotation restricting portion 61a of the moving body 4 described later so as to be movable in the vertical direction. In the present embodiment, the first to fourth corner portions 2a to 2d are formed integrally with the cylindrical body.

As shown in FIG. 3, the drive main body 3 includes a piezoelectric element 31 that is an example of an electromechanical conversion element that expands and contracts in the axial direction, a drive shaft 32 that is connected to one end of the piezoelectric element 31, and a piezoelectric element 31. And a weight 33 connected to the other end.

The weight 33 is a member for causing displacement due to expansion and contraction of the piezoelectric element 31 mainly on the drive shaft 32 side, preferably only on the drive shaft 32 side. In this embodiment, the weight 33 is formed of a material having a high specific gravity such as tungsten or a tungsten alloy.

The weight 33 is a cylindrical shape formed so that the outer diameter protrudes from the outer periphery of the piezoelectric element 31 to the outer periphery over the entire periphery.

The weight 33 may be omitted when the other end of the piezoelectric element 31 can be provided with the same function as the weight 33 by being attached to the holding member 2 or the like.

The piezoelectric element 31 is an example of an electromechanical conversion element. This electromechanical transducer is an element that converts input electrical energy into mechanical energy that expands and contracts, that is, mechanical motion. For example, a piezoelectric that converts input electrical energy into mechanical elastic motion by the piezoelectric effect. Elements and the like. In the present embodiment, as described above, the piezoelectric element 31 is used as the electromechanical conversion element, and the piezoelectric element 31 includes, for example, a laminated body and a pair of external electrodes.

The laminate is formed by alternately laminating a plurality of thin film (layered) piezoelectric layers made of a piezoelectric material and a conductive thin film (layered) internal electrode layer. In the present embodiment, the laminate has a quadrangular prism shape, but is not limited to this, and may be, for example, a polygonal column shape or a cylindrical shape.

In the plurality of internal electrode layers, the plurality of anode layers among the plurality of internal electrode layers reach one side of the outer peripheral side surface in the multilayer body, and the plurality of cathode layers reach the other side of the outer peripheral side surface in the multilayer body. Are extended so that the front ends of the respective layers face each other on a pair of outer peripheral side surfaces facing each other. A pair of

external electrodes

31a and 31a supply the electric energy to the laminated body, and are formed on the pair of outer peripheral side surfaces of the laminated body by a sputtering method such as silver along the laminating direction. The plurality of internal electrodes are sequentially and alternately connected so as to be connected in parallel.

Examples of the piezoelectric material include lead zirconate titanate (so-called PZT), crystal, lithium niobate (LiNbO ₃ ), potassium tantalate niobate (K (Ta, Nb) O ₃ ), barium titanate (BaTiO ₃ ), Inorganic piezoelectric materials such as lithium tantalate (LiTaO ₃ ) and strontium titanate (SrTiO ₃ ).

The lower end surface of the piezoelectric element 31 is bonded to the upper end surface of the weight 33 with an adhesive such as an epoxy adhesive. In this embodiment, resinous beads having a diameter of about 5 μm are mixed in the epoxy adhesive in order to prevent a short circuit with the weight and stabilize the thickness of the adhesive layer.

The drive shaft 32 is formed of carbon fiber reinforced plastic (CFRP, carbon-fiber-reinforced plastic) in which carbon fibers are arranged in the axial direction and formed into a cylindrical shape with a resin. The drive shaft 32 of the present embodiment is formed so that the outer diameter protrudes from the outer periphery of the piezoelectric element 31 to the outer periphery over the entire periphery.

The lower end surface of the drive shaft 32 is bonded to the upper end surface of the piezoelectric element 31 with an adhesive. This adhesive is the same as the adhesive that bonds the piezoelectric element 31 and the weight 33.

The adhesive (fillet) protruding from the joint surface between the drive shaft 32 and the piezoelectric element 31 is formed on the piezoelectric element 31 side. As a result, the entire region of the drive shaft 32 (the entire region in the axial direction on the outer peripheral surface) can be used for sliding with the moving body 4, and a large stroke can be realized with the short drive shaft 32.

As shown in FIG. 13, the drive main body 3 configured in this manner is fitted and inserted into the drive main body holding portion 21 of the holding member 2 from the weight 33 side, and is driven by an adhesive (not shown). The bottom surface of 21 and the weight 33 are bonded, and the drive main body 3 is fixed in the drive main body holding portion 21.

In this state, the axial direction of the drive shaft 32 coincides with the axial direction of the holding member 2.

Further, in the drive main body 3 held by the drive main body holding portion 21 of the holding member 2 in this way, a pair of external elements in the piezoelectric element 31 are provided via the two first electrode connection springs 24a and the second electrode connection spring 24b. Each of the electrodes 31a is connected to the tip 22a of the first electrode terminal 22 and the tip 23a of the second electrode terminal 23 so as to be energized.

More specifically, as shown in FIG. 10, the first electrode connection spring 24a and the second electrode connection spring 24b have the same configuration, and are each a coil portion 25a that is plated with gold or platinum and wound with a wire. The torsion coil spring includes a first foot portion 25b and a second foot portion 25c that project radially outward from the coil portion 25a.

In the first electrode coupling spring 24a, the tip 22a of the first electrode terminal 22 is pushed into the coil portion 25a, the first foot portion 25b abuts on one external electrode 31a of the piezoelectric element 31, and the second foot portion 25c. Is locked to a spring locking portion 26 (see FIG. 9) provided in the holding member 2. In this state, a torsional force is accumulated in the coil portion 25a, and the first foot 25b presses the external electrode 31a of the piezoelectric element 31 by the torsional force.

In the second electrode connection spring 24b, the tip 23a of the second electrode terminal 23 is pushed into the coil portion 25a, the first foot portion 25b contacts the other external electrode 31a of the piezoelectric element 31, and the second foot portion 25c. Is locked to a spring locking portion 26 (see FIG. 9) provided in the holding member 2. In this state, a torsional force is accumulated in the coil portion 25a, and the first foot 25b presses the external electrode 31a of the piezoelectric element 31 by the torsional force.

In the present embodiment, the conductive adhesive 27 is applied from the contact portion between the first foot portion 25b of each of the first electrode connection spring 24a and the second electrode connection spring 24b and the external electrode 31a of the piezoelectric element 31 to the coil portion 25a. It arrange | positions so that it may interpose. Thereby, in addition to the first electrode connection spring 24a and the second electrode connection spring 24b, the conductive adhesive 27 can energize the external electrode 31a of the piezoelectric element 31, the first electrode terminal 22, and the second electrode terminal 23. Connected and connected more securely.

In this embodiment, the surface of the conductive adhesive 27 is covered with the reinforcing adhesive 28 to reinforce the adhesive strength of the conductive adhesive 27.

Next, the moving body 4 will be described. The moving body 4 is engaged with the drive shaft 32 with a predetermined frictional force, and slides along the axial direction of the drive shaft 32. As shown in FIG. 2, the moving body 4 of the present embodiment includes a metal cylindrical moving body main body 5 and a guide spring (metal plate body) 6 that is separate from the moving body main body 5. . In the present embodiment, the movable body main body 5 is made of, for example, stainless steel and has a thickness of 0.05 mm to 0.3 mm, and is formed by drawing. Stainless steel is a material that is inexpensive, has good moldability, good durability, and good driving performance among metal materials.

As shown in FIGS. 5 and 6, the movable body main body 5 includes a lens holding portion 54 on the inner peripheral side, and the lens holding portion 54 has a lens barrel as a moved body having one or a plurality of lens groups 71. 7 (see FIG. 13). An adhesive groove 72 is provided on the side surface of the lens barrel 7, and the lens barrel 7 is adhered to the lens holding portion 54 by filling the adhesive groove 72 with an adhesive 73 (see FIG. 13).

The movable body main body 5 includes a first sliding surface 51 that slides on the drive shaft 32 on a part of the outer peripheral surface. In the present embodiment, the first sliding surface 51 is formed in a flat plate shape with a predetermined width in the circumferential direction over the entire axial direction when molding the movable body main body 5. To form a flat surface. For this reason, when the movable body main body 5 slides on the drive shaft 32, the movable body main body 5 can slide while maintaining a certain posture without being inclined with respect to the drive shaft 32.

The movable body body 5 includes a first flange 52 formed at the lower end so as to protrude radially inward, and a second flange 53 formed at the upper end so as to protrude radially outward. The strength of the movable body main body 5 is increased by these.

The upper surface of the first flange 52 forms a lens barrel mounting portion 52a. When the lens barrel 7 is held by the lens holding portion 54 as shown in FIG. 13, the lens barrel mounting portion 52a has a lens barrel. 7 is arranged such that the axis of the movable body main body 5 and the optical axis of the lens group 71 of the lens barrel 7 are aligned without tilting each other.

Thus, since the movable body 5 is a metal tube, it has high durability and durability against wear, and because of the thin metal tube, it is possible to increase the diameter of the lens 71 held inside. . Since the drive shaft 33 is driven in direct contact with the movable body 5, the portion that frictionally engages with the actuator 3 is held inside the movable body main body 5 in comparison with the configuration that is provided separately from the portion that holds the lens 71. The diameter of the lens 71 used can be increased.

In the present embodiment, the guide spring 6 is made of, for example, stainless steel and has a thickness of 0.1 mm to 0.3 mm. 7 and 8, the guide spring 6 includes an arc portion 61, a guide portion 62 formed on one end side of the arc portion 61, and a pressing piece 63 formed on the other end side of the arc portion 61. Is provided.

The arc portion 61 includes a rotation restricting portion 61a at a position separated from the guide portion 62 by approximately 180 ° in the circumferential direction. The rotation restricting portion 61a is for restricting the rotation of the movable body 4 around the axis of the drive shaft 32, and includes a restricting frame portion 61b and a hemispherical protrusion 61c formed on the restricting frame portion 61b. .

The restriction frame portion 61b is formed so that a part of the arc portion 61 protrudes radially outward in a rectangular shape.

The protrusion 61c is formed so as to protrude outward from both outer side surfaces of the restriction frame portion 61b. Further, the outer width W1 (see FIG. 9) between the protrusions 61c is set to be slightly narrower than the inner width W2 (see FIG. 9) of the restricting portion receiving groove 29 of the holding member 2. In FIG. 9, the outer width W <b> 1 between the protrusions 61 c and the inner width W <b> 2 of the restricting portion receiving groove 29 are represented by the same width.

Moreover, in this embodiment, the circular arc part 61 is provided with the narrow part 61d whose width | variety is narrower than another part between one end (guide part 62) and the rotation control part 61a.

The guide portion 62 is formed by bending a part of one end side of the arc portion 61 outward in the radial direction of the arc portion 61, and a second sliding surface 62 a that slides the drive shaft 32 is formed on one surface thereof. Prepare.

The pressing piece 63 is formed so as to extend linearly from the other end of the arc portion 61 through a stepped portion, and includes a pressing portion 63a that presses the drive shaft 32 at a tip portion thereof. The pressing part 63a of the present embodiment is formed narrower than the first sliding surface 51 and the second sliding surface 62a.

The guide spring 6 and the movable body main body 5 are fixedly connected by welding.

More specifically, as shown in FIG. 11, the guide spring 6 and the movable body main body 5 are adjacent to each other in the first sliding surface 51 of the movable body main body 5 and the second sliding surface 62a of the guide spring 6. The guide spring 6 is wound around the outer periphery of the movable body main body 5.

And in this state, both are fixed by welding such as resistance welding (spot welding) and laser welding at a plurality of locations (in this embodiment, four locations separated from each other indicated by x in FIG. 7). .

In this embodiment, at the time of welding, as shown in FIG. 12, the positioning jig 11 holding the rotation restricting portion 61a and the second sliding surface posture adjusting jig 12 holding the guide portion 62 are used. Welding is performed after determining the positions of the main body 5 and the guide spring 6 and the attitude of the second sliding surface. At this time, for example, when the posture of the second sliding surface is set, the posture of the second sliding surface is easily set by the narrow portion 61 d of the arc portion 61.

In a state fixed by this welding, the first sliding surface 51 and the second sliding surface 62a are substantially perpendicular to each other, and the first and second sliding

surfaces

51, 62a form an L shape together. is doing.

In this way, the movable body main body 5 and the guide spring 6 are made of a metal such as stainless steel, and are joined by welding, so that the movable body main body 5 and the guide spring 6 can be firmly fixed. Since it can be fixed instantly, the manufacturing tact time can be greatly reduced.

Then, the movable body 4 to which the movable body main body 5 and the guide spring 6 are coupled is configured so that the rotation restricting portion 61a is inserted into the restricting portion receiving groove 29 of the holding member 2, as shown in FIG. It arrange | positions so that the axis | shaft 32 may be enclosed by the 1st sliding surface 51, the 2nd sliding surface 62a, and the press part 63a.

Accordingly, the first sliding surface 51 is pressed against the outer periphery of the drive shaft 32 by the elastic force of the pressing piece 63, and the second sliding surface 62 a contacts the first sliding surface 51 on the outer periphery of the driving shaft 32. The movable body 4 is frictionally engaged with the drive shaft 32 by being pressed to a position that is spaced a predetermined distance in the circumferential direction.

In this state, the pressing piece 63 is in a state extending from the second corner portion 2b of the holding member 2 to the first corner portion 2a. The first sliding surface 51 is perpendicular to a line P connecting the center O1 of the holding member 2 and the axis O2 of the drive shaft 32 when viewed from the upper side (one side) of the drive shaft 32 in the axial direction. The second sliding surface 62a is parallel to the line P.

Next, the cover 8 will be described with reference to FIGS. The cover 8 of the present embodiment is formed into a box shape with one surface (lower surface) opened by drawing or pressing a thin plate made of stainless steel having a thickness of 0.1 mm to 0.2 mm, for example. Through-hole 82 is provided. The through hole 82 has a shape corresponding to the shape of the optical path in the lens barrel 7 and is, for example, a circular shape.

The cover 8 is provided with a locking hole 84 for locking to a locking projection 20f provided on the side surface of the holding member 2 on each of the four side walls 83. In this embodiment, the number of the locking projections 20f is two, and the locking projections 20f are locked with the two locking holes 84 facing each other.

The cover 8 is formed on the upper surface of the first support column 20a, the third support column 20c, and the fourth support column 20d of the holding member 2 and the upper surface of the second support column 20b. With the inner surface of the upper wall 81 in contact, the locking hole 84 and the locking projection 20f are locked.

In this locked state, the upper surfaces of the mounting table 20e and the second support pillar 20b and the inner surface of the upper wall 81 of the cover 8 are bonded and bonded with an adhesive.

Next, an embodiment of a method for manufacturing the drive device 1 according to this embodiment will be described with reference to FIGS. 14 and 15 are views showing a terminal holding member 200 according to an embodiment used for manufacturing the drive device 1 shown in FIG. 1, and FIG. 15 is an enlarged view of a main part of FIG. 16 and 17 are views showing a hoop molded product 210 formed by inserting an electrode terminal provided on the terminal holding member 200 shown in FIG. 14 and injection-molding a holding member. FIG. FIG. 18 and 19 are views showing the hoop-molded product 210 in a state in which the protruding portion 203a of the first connecting member 203 is cut, and FIG. 19 is an enlarged view of a main part of FIG. FIG. 20 is a schematic diagram showing the flow of the manufacturing method of the drive device shown in FIG. 1, and the components of the drive main body portion 3, the moving portion 4 and the cover 8 are added to the hoop molded product 210 shown in FIGS. It shows how it is assembled.

In the present embodiment, the drive device 1 is manufactured using the terminal holding member 200 having the first electrode terminal 22 and the second electrode terminal 23. The terminal holding member 200 is formed by punching a long plate-like body having a predetermined width made of a material suitable for the first electrode terminal 22 and the second electrode terminal 23, for example, white (alloy of copper, zinc and nickel). Is formed.

As shown in FIG. 14 and FIG. 15, the terminal holding member 200 of this embodiment includes a plurality of first electrode terminals 22 and a plurality of second electrode terminals 23 used for each of the plurality of driving devices 1, and both sides thereof. A pair of elongated left and right first and

second support members

201, 202, a first connection piece 203, and a second connection piece 204 are provided.

Each of the first and

second support members

201 and 202 has a plurality of

feed holes

201a and 202a that are formed penetrating at predetermined intervals in the longitudinal direction. The first support member 201 and the second support member 202 alternately support the plurality of first electrode terminals 22 and the plurality of second electrode terminals. The first support member 201 and the second support member 202 are formed by progressive pressing, and one set of the first electrode terminal 22 and one second electrode terminal 23 is set as a pair (one pair). A plurality of sets corresponding to the driving device 1 are supported.

More specifically, the pair of first and

second electrode terminals

22 and 23 are arranged between the first support member 201 and the second support member 202 in the longitudinal direction of the first support member 201 (second support member 202). The base ends of the

external connection terminals

22 b and 23 b are arranged so as to be connected to the first support member 201 at a distance from each other.

The length of the second electrode terminal 23 from the first support member 201 to the tip 23a is longer than the length of the first electrode terminal 22 from the first support member 201 to the tip 22a. The second electrode terminal 23 is connected to one end of the first connecting piece 203 at the tip 23 a side. The other end of the first connection piece 203 is connected to the second support member 202. That is, the second electrode terminal 23 is connected to the second support member 202 via the first connection piece 203. Therefore, the base end of the first electrode terminal 22 is connected to the first support member 201 so that the first electrode terminal 22 is supported by the first support member 201 in a cantilever manner, and the base end of the second electrode terminal 23 is the first end. By being connected to the support member 201 and having its tip 23 a connected to the second support member 202 via the first connection piece 203, both ends are supported by the first and

second support members

201 and 202.

The first connecting piece 203 has a predetermined length from the connecting portion with the second electrode terminal 23 and extends from the second electrode terminal 23 in the longitudinal direction of the first support member 201 (perpendicular to the longitudinal direction of the second electrode terminal 23). A projecting portion 203a projecting in any direction.

In this way, the first electrode terminal 22 and the second electrode terminal 23 that form a pair are arranged along the longitudinal direction of the first support member 201 and the second support member 202 so that adjacent pairs are separated from each other. A plurality of sets are arranged.

Moreover, in this embodiment, the 2nd connection piece 204 connected by each is arrange | positioned so that it may pass between the 1st support member 201 and the 2nd support member 202 between 2 sets adjacent mutually. Is done.

And the terminal holding member 200 configured in this way is sequentially fed into the injection molding machine. Although not shown, the injection molding machine includes a plurality of holding member 2 molding dies, and an LCP (liquid crystal polymer) is fed into each of the molding dies to form a set of first and second electrode terminals. The hoop-molded product shown in FIGS. 16 and 17 having the holding member 2 into which each part in 22 and 23, a part of one first connecting piece 203, and a part of one second connecting piece 204 are inserted. 210 is formed by insert molding.

Next, in FIG. 20, the first electrode connection spring 24 a and the second electrode connection spring 24 b (component members) are picked (picked up) by a transfer robot (not shown) and disposed on the holding member 2. More specifically, first, the first and

second electrode terminals

22 and 23 are firstly viewed from above so that the

tips

22a and 23a are respectively fitted inside the first and second

electrode connecting springs

24a and 24b. The first and second electrode coupling springs 24a and 24b are assembled to the

respective tips

22a and 23a of the

second electrode terminals

22 and 23. Next, an adhesive is applied to the drive main body holding portion 21, and the drive main body portion 3 is picked by a transfer robot (not shown) and inserted into the drive main body holding portion 21 of the holding member 2. More specifically, the drive main body 3 is fitted into the drive main body holding portion 21 while being moved from the inner peripheral side to the outer peripheral side of the holding member 2 to a position corresponding to the drive main body holding portion 21. At this time, the respective foot portions 25b of the first and second electrode coupling springs 24a and 24b are pressed by the pair of external electrodes 31a in the drive main body portion 3, so that the respective foot portions 25b are engaged with the locking portions 26. The first and second electrode coupling springs 24a and 24b are urged and pressed, and the foot portions 25b are pressed against the pair of external electrodes 31a. As a result, an electrical connection structure is configured, and the pair of external electrodes 31a and the first and second electrode coupling springs 24a and 24b are both connected to be energized. Next, UV light (ultraviolet light) is irradiated to the adhesive, and the adhesive is cured thereby, whereby the drive main body 3 is fixedly held by the holding member 2 (FIGS. 2 and 10). reference).

Next, the conductive adhesive 27 is applied to the above-mentioned part by a dispenser, and the holding member 2 assembled with the drive main body 3 and the like in this way is passed through a thermosetting tunnel furnace for a predetermined time. Thereafter, a UV adhesive (ultraviolet curable adhesive) as the reinforcing adhesive 28 is applied onto the surface of the conductive adhesive 27 by a dispenser, and the UV adhesive is irradiated with UV light. Cured.

Next, for example, a lubricant such as oil is applied to the drive shaft 32 and the restricting portion receiving groove 29 of the holding member 2 by a dispenser or the like (processing).

Next, the rotation restricting portion 61a of the moving body 4 (component member) is placed in the restricting portion receiving groove 29 of the holding member 2, and the moving body 4 is frictionally engaged with the drive shaft 32 (FIGS. 2 and 9). reference).

Next, the solvent-based adhesive is applied to each upper surface of the first support column 20a, the third support column 20c and the fourth support column 20d of the holding member 2 and the upper surface of the second support column 20b by a dispenser. The cover 8 that has been applied and sent by the parts feeder is picked by a transfer robot (not shown) and placed on the holding member 2 (see FIG. 2). And UV adhesive is apply | coated to the recessed part of the side surface of the cover 8, UV light is irradiated to this UV adhesive, and this UV adhesive is hardened (process).

Next, each base end of each of the first and

second electrode terminals

22 and 23 is cut from the first support member 201 at a position indicated by a one-dot chain line in FIG. Thereafter, the cut base ends are bent by a press machine (not shown), thereby forming the

external connection terminals

22b and 23b (see FIG. 10).

Next, the protruding portion 203a of the first connecting piece 203 is cut in the vicinity of the outer periphery of the holding member 2 (for example, the position indicated by the two-dot chain line in FIG. 17) by a not-shown press machine, thereby FIG. 16 and FIG. As shown in FIG. 3, the protruding portion 203 a of the first connecting piece 203 is removed from the holding member 2. Note that the protrusion 203a may be cut before the drive main body 3 is assembled to the holding member 2. In addition, in FIG. 16 thru | or FIG. 19, illustration of the mounted cover 8 is abbreviate | omitted.

Next, the first connecting piece 203 is cut in the vicinity of the outer periphery of the holding member 2 (for example, each position indicated by a one-dot chain line in FIG. 19) by a not-shown pressing machine, and the holding member 2 is removed from the first connecting piece 203. Disconnected. Further, the second connecting piece 204 is cut in the vicinity of the outer periphery of the holding member 2 (for example, a position indicated by a two-dot chain line in FIG. 19), and the holding member 2 is separated from the second connecting piece 204. As a result, the drive device 1 is individualized. By manufacturing in this way, the drive device 1 shown in FIG. 1 is continuously manufactured.

Next, the driving device 1 is picked by a robot (not shown), put into an inspection machine, and inspected.

These steps are processed in parallel as shown in FIG. More specifically, the hoop-molded product 210 uses the

feed holes

201a and 202a of the terminal holding member 200 so that a certain amount of movement (for example, between the first electrode terminals 22) is performed at regular time intervals (for example, every 2 seconds). Are intermittently moved in the longitudinal direction.

The tact times of the respective processes such as the assembly of the drive main body 3, the assembly of the movable body 4, and the adhesion of the cover 8 are common, and each process involves the movement of the terminal holding member 200 (the hoop molded product 210). Performed in parallel at different locations. Thereby, mass production is possible, and the manufacturing cost can be further reduced.

In addition, when the production line is configured using the terminal holding member 200 formed by the progressive press, the positional relationship of the components such as the first electrode terminals 22 with respect to the terminal holding member 200 used as the conveying member is accurate. Therefore, the accuracy of alignment between the assembly device (transfer robot, dispenser, press machine, etc.) and each component is improved, the assembly can be easily automated, and the assembly accuracy is also improved.

In the drive device 1 manufactured as described above, for example, as shown in FIG. 13, the lens barrel (imaging optical system) 7 is held by the lens holding portion 54 of the moving body 4, and the IR cut is formed on the lower surface side of the holding member 2. A sensor substrate 104 having a filter 102 and an image sensor 103 is attached. Thereby, the imaging device 100 is formed.

The image sensor 103 is an image of each component of R (red), G (green), and B (blue) according to the amount of light in an optical image of an object (subject) imaged by an imaging optical system (not shown) as a whole. It is an element that photoelectrically converts a signal and outputs it to a predetermined image processing circuit (not shown). The image sensor 103 is, for example, a CCD image sensor, a CMOS image sensor, or the like.

The imaging optical system includes one or a plurality of lens groups (optical elements) including a lens group 71, and forms an optical image of an object on the light receiving surface of the imaging element 103. The lens group 71 is an optical element that moves along the optical axis among the one or more optical elements in such an imaging optical system. The lens group 71 may be a single lens or may include a plurality of lenses. The lens group 71 may be, for example, an optical system that moves along the optical axis to perform focusing (focusing), and, for example, an optical that moves along the optical axis to perform zooming (magnification). It may be a system. The optical image of the object is guided by the imaging optical system including the lens group 71 to the light receiving surface of the imaging element 103 along the optical axis, and the optical image of the object is captured by the imaging element 103. The

Then, for example, the external connection terminal 22b of the first electrode terminal 22 and the external connection terminal 23b of the second electrode terminal 23 are arranged on the circuit board of the mobile phone, and are installed in the casing of the mobile phone.

When electric power (drive signal) is supplied from an unillustrated drive circuit to the external connection terminal 22b of the first electrode terminal 22 and the external connection terminal 23b of the second electrode terminal 23, the piezoelectric element 31 of the drive device 3 is moved in the axial direction. The drive shaft 32 reciprocates due to the expansion and contraction, and the movable body 4 moves in the axial direction (optical axis direction) of the drive shaft 32 due to the reciprocation.

More specifically, when a rectangular wave having a predetermined duty ratio is supplied as a drive signal to the piezoelectric element 31, the displacement of the piezoelectric element 31 becomes a triangular wave, and when the rectangular wave has a duty ratio changed, the rectangular wave is increased (when extended). ) And a triangular wave-like expansion / contraction motion with different inclinations when descending (when contracting). The drive mechanism of the drive main body 3 utilizes this.

For example, when the drive shaft 32 is slowly extended, the moving body 4 that is frictionally engaged with the drive shaft 32 also moves in accordance with the extension, and the drive is instantaneously performed to exceed the frictionally engaged friction force. When the shaft 32 is contracted, the moving body 4 is left as it is at the position of the movement destination. The movable body 4 moves in the axial direction of the drive shaft 32 by repeatedly expanding and contracting the drive shaft 32 in the axial direction.

In the above embodiment, the holding member 2 is injection molded, and the first electrode terminal 22 and the second electrode terminal 23 are assembled so as to be inserted at the time of the injection molding. However, it can be changed as appropriate.

For example, the holding member 2 is composed of a plurality of members, and these members are formed in advance, and a part of the first electrode terminal 22 and a part of the second electrode terminal 23 in the terminal holding member 200 A part of the first connecting piece 203 and a part of one second connecting piece 204 are disposed in the holding member 2 by disposing them in the plurality of members constituting the holding member 2. And the holding member 2 may be assembled.

Even in that case, the tact time of each process such as the assembly of the holding member 2, the assembly of the drive main body 3, the assembly of the moving body 4, and the adhesion of the cover 8 is the same, and each process includes the terminal holding member 200. It is performed simultaneously in parallel at different locations in the moving direction of the (hoop-formed product 210).

In that case, the terminal holding member 200 shown in FIG. 14 can be wound in a reel shape sequentially from one end side in the longitudinal direction. Therefore, the terminal holding member 200 may be wound once, and then the holding member 2 may be sequentially assembled while the wound terminal holding member 200 is rewound. If it does in this way, formation of terminal holding member 200 and an assembly process with holding member 2 can also be performed in a different place, and manufacture can be performed easily.

Further, the winding of the terminal holding member 200 is not limited to the one performed before the connection step of connecting the

electrode terminals

22 and 23 and the drive main body, and can be changed as appropriate. The winding of the terminal holding member 200 can be performed, for example, between the post-process and the connection process in which the electrode terminal, the holding member, or the drive main body is processed or processed. For example, when the post-process is plural In addition, it can be performed between the plurality of subsequent processes, and can be changed as appropriate.

Moreover, also when the holding member 2 is injection-molded and the 1st electrode terminal 22 and the 2nd electrode terminal 23 are inserted in the case of the injection molding like the said embodiment, the elongate shape shown in FIG. The hoop-molded product 210 can be sequentially wound in a reel shape from one end side in the longitudinal direction.

Accordingly, the hoop molded product 210 is once wound, and then the drive main body 3 and the like are successively assembled to the holding member 2 while the wound hoop molded product 210 is rewound. It may be. Even in this case, the formation of the hoop-molded product 210 and the assembly process of the drive main body 3 and the like to the holding member 2 can be performed at different locations, or the hoop-molded product 210 is wound in a reel shape. In addition, a plurality of pieces temporarily stored and wound in a reel shape can be supplied in parallel to perform a subsequent process, and manufacturing can be easily performed.

Further, during the process of assembling the drive main body 3, the process of assembling the cover 8, the process of bending the electrode terminals, or the process of separating the drive device from the first support member 201 and the second support member 202, the hoop-molded product 210. Is wound once, and then the subsequent process may be performed while the wound hoop molded product 210 is rewound. When the tact time for each process is greatly different, a process with a different tact time can be performed as another production line. Moreover, since the transfer between manufacturing lines can be performed in the winding state of the terminal holding member 200, workability | operativity is good.

Thus, when necessary between each process, the terminal holding member 200 is wound and the hoop molded product 210 is wound, and after moving to the next process, the next process is performed while rewinding. Therefore, the manufacturing method of the driving device 1 in this embodiment has a high degree of freedom in winding. In addition, while the raw material of the terminal holding member 200 wound in roll shape is rewound, the

electrode terminals

22 and 23 are punched and the terminal holding member 200 is not taken up, and the above-described operation until the drive device 1 is completed. All of the steps may be performed as a series of steps.

Moreover, in the said embodiment, although the drive main-body part 3 illustrated the actuator (for example, SIDM) using a piezoelectric element, it is not restricted to this, The drive main-body part 3 is an actuator using a voice coil motor, shape memory alloy. It may be an actuator using or an actuator using bimetal.

Moreover, in the said embodiment, although the terminal holding member 200 is provided with the 1st connection piece 203 and the 2nd connection piece 204, it can change suitably not only in the thing of this form. The terminal holding member 200 may include only one of the first connection piece 203 and the second connection piece 204, for example.

In the above embodiment, the pair of external electrodes 31 a and the

electrode terminals

22 and 23 in the piezoelectric element 31 of the drive main body 3 can be energized through both the electrode coupling springs 24 a and 24 b and the conductive adhesive 27. However, the present invention is not limited to this configuration and can be changed as appropriate. The pair of external electrodes 31a and the

electrode terminals

22 and 23 may be connected by only one of the electrode coupling springs 24a and 24b and the conductive adhesive 27, for example. Further, the pair of external electrodes 31a and the

electrode terminals

22 and 23 in the piezoelectric element 31 of the drive main body 3 may be configured to be directly connected, and can be changed as appropriate.

This specification discloses various modes of technology as described above, and the main technologies are summarized below.

The manufacturing method of the drive device concerning one mode uses the terminal holding member which arranged and supported the plurality of electrode terminals used for each of the plurality of drive devices by the support member, and sequentially connects the electrode terminal and the holding member in the terminal holding member. An assembling step for assembling, and a connecting step for holding the drive main body on the holding member assembled to the electrode terminal and connecting the electrode terminal to the drive main body.

Such a method for manufacturing a drive device can, for example, sequentially and sequentially assemble electrode terminals and holding members arranged and supported by a support member by automatic feeding using a parts feeder or the like. Therefore, such a drive device manufacturing method does not require connection of lead wires or the like as in the prior art, enables mass production by automation, and reduces manufacturing costs.

In addition, such a method for manufacturing a drive device can also wind, for example, a terminal holding member in which a holding member is assembled to an electrode terminal in a reel shape, and can be temporarily stored by being wound in a reel shape. In addition, such a method for manufacturing a driving device can also supply a plurality of reels wound in parallel to perform subsequent steps.

In another aspect, in the above-described method for manufacturing a drive device, in the assembling step, the holding member is injection-molded around the electrode terminal.

In such a drive device manufacturing method, the holding member is injection-molded by inserting the electrode terminal, so that the assembly process is facilitated. Therefore, the manufacturing method of such a drive device is more suitable for mass production that is easier to automate, and the manufacturing cost can be further reduced.

In another aspect, in the above-described driving device manufacturing method, after the connecting step, the driving member is assembled to the holding member or the driving main body, or the electrode terminal, the holding member or the driving device is assembled. A post-process for performing processing or processing on the drive main body, the terminal holding member is moved intermittently, and the assembly process and the post-process are performed at different positions in the moving direction of the terminal holding member. Do in parallel.

The manufacturing method of such a drive device is suitable for mass production and can further reduce the manufacturing cost because a plurality of processes can be performed simultaneously at different positions in the moving direction of the long terminal holding member. it can.

In another aspect, the above-described method for manufacturing a drive device further includes a winding step of winding the terminal holding member between a plurality of steps including the connection step and the post-step.

Such a method of manufacturing a drive device can change the number of production lines when the tact time between processes is different, and can increase production efficiency. Furthermore, such a drive device manufacturing method can perform transfer between manufacturing lines while the terminal holding member is wound up, so that workability is good.

In another aspect, in the above-described manufacturing method of the driving device, the assembling step is performed in a state where an end portion of the electrode terminal protrudes from the holding member to the outer peripheral side, and the assembling step is performed. After passing, the terminal formation process which forms the external connection terminal by bending the edge part of the said protruded electrode terminal is further provided.

Such a method for manufacturing a drive device can be connected by placing the bent external connection terminal on a circuit board such as a mobile phone on which the drive device is mounted, and the drive device can be easily mounted on a mobile phone or the like.

In another aspect, in the above-described manufacturing method of the driving device, the support member includes first and second support members arranged at a predetermined distance from each other, and the electrode terminal includes one electrode terminal. A plurality of sets each including a first electrode terminal and one second electrode terminal are provided, and the plurality of sets of electrode terminals are interposed between the first support member and the second support member. The first and second electrode terminals are connected to the first support member, and the first electrode terminal and the second support terminal are disposed at intervals between the sets along the longitudinal direction of the member and the second support member. Either one of the electrode terminals is formed so that the length from the first support member is longer than the other, and the terminal holding member is connected to each of the first support member and the one of the electrode terminals. The first connecting member is further provided, and the assembling step includes the first connecting member. Assembling the holding member to the coupling member.

In the manufacturing method of such a drive device, the first connecting member can stably hold one electrode terminal having a long length from the first support member, and the electrode terminal is attached to the holding member when assembled to the holding member. The electrode terminal and the holding member can be assembled without being displaced from each other.

In another aspect, in the above-described manufacturing method of the driving device, the assembling step may be configured such that a part of the first connecting member between the first support member and any one of the first connecting member and the one of the outer periphery from the holding member. A cutting step of cutting a part of the first connecting member after the assembling step is performed in a state of projecting to the side.

Such a method of manufacturing a driving device can disconnect the first connecting member from one electrode terminal, and can prevent the power supplied to the electrode terminal from escaping to the first connecting member.

In another aspect, in the above-described manufacturing method of the driving device, the support member includes first and second support members disposed at a predetermined distance from each other, and the terminal holding member includes: A second connecting member connected to each of the first supporting member and the second supporting member is further provided, and the assembling step assembles the holding member to the second connecting member.

In the manufacturing method of such a driving device, the electrode terminal can be held in a state of being positioned with respect to the support member by the second connecting member, and the electrode terminal is displaced with respect to the holding member when assembled to the holding member. The electrode terminal and the holding member can be assembled.

This application is based on Japanese Patent Application No. 2012-217274 filed on Sep. 28, 2012, the contents of which are included in this application.

In order to express the present invention, the present invention has been properly and fully described through the embodiments with reference to the drawings. However, those skilled in the art can easily change and / or improve the above-described embodiments. It should be recognized that this is possible. Therefore, unless the modifications or improvements implemented by those skilled in the art are at a level that departs from the scope of the claims recited in the claims, the modifications or improvements are not covered by the claims. To be construed as inclusive.

According to the present invention, it is possible to provide a method of manufacturing a drive device that is preferably used in an imaging device that can be mounted on, for example, a mobile phone.

Claims

Using a terminal holding member in which a plurality of electrode terminals used for each of a plurality of driving devices are arranged and supported by a support member, and an assembly step of sequentially assembling the electrode terminal and the holding member in the terminal holding member;
A drive device manufacturing method comprising: a holding member assembled to the electrode terminal; and a connecting step of holding the drive main body portion and connecting the electrode terminal and the drive main body portion.
The method of manufacturing a drive device according to claim 1, wherein the assembling step includes injection-molding the holding member around the electrode terminal.
After the connecting step, further comprising a post-process for assembling the constituent member of the driving device to the holding member or the driving main body, or performing processing or processing on the electrode terminal, the holding member or the driving main body,
The terminal holding member is moved intermittently, and the assembly step and the post-process are performed in parallel at different positions in the moving direction of the terminal holding member. The manufacturing method of the drive device of description.
The method for manufacturing a drive device according to claim 3, further comprising a winding step of winding the terminal holding member between a plurality of steps including the connecting step and the post-step.
The assembly step is performed in a state where the end of the electrode terminal protrudes from the holding member to the outer peripheral side,
4. The terminal forming step according to claim 1, further comprising a terminal forming step of forming an external connection terminal by bending an end portion of the protruded electrode terminal after the assembly step. 5. The manufacturing method of the drive device of description.
The support member includes first and second support members disposed at a predetermined distance from each other,
The electrode terminal includes a plurality of sets each including one first electrode terminal and one second electrode terminal,
The plurality of sets of electrode terminals are arranged between the first support member and the second support member with a distance between the sets along the longitudinal direction of the first support member and the second support member,
The first and second electrode terminals are coupled to the first support member,
Either one of the first electrode terminal and the second electrode terminal is formed such that the length from the first support member is longer than the other one,
The terminal holding member further includes a first connection member connected to each of the first support member and any one of the first support member,
The method of manufacturing a drive device according to any one of claims 1 to 5, wherein in the assembling step, the holding member is assembled to the first connecting member.
The assembly step is performed in a state in which a part between the first support member and the one of the first connecting members protrudes from the holding member to the outer peripheral side,
The method of manufacturing a drive device according to claim 6, further comprising a cutting step of cutting a part of the first connecting member after the assembly step.
The support member includes first and second support members arranged at a predetermined distance from each other,
The terminal holding member further includes a second connecting member connected to each of the first supporting member and the second supporting member so as to be passed to the first supporting member and the second supporting member,
The method of manufacturing a drive device according to any one of claims 1 to 7, wherein in the assembling step, the holding member is assembled to the second connecting member.