JP2012233970A - Method for manufacturing imaging device and positioning jig for imaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing an imaging device in which an adhesive is hard to be adhered to the tip of a movement operation member, and also to provide a positioning jig for the imaging device.SOLUTION: A positioning jig for an imaging device includes a movement operation member 93. The movement operation member 93 includes: a movement operation member body 95; and a wettability reduction part 96 which is constituted of a fluorine resin coating arranged so that the whole circumference of the movement operation member body 95 is covered, and which has reduced wettability to an adhesive than that of a material constituting the movement operation member body 95.

Description

  The present invention is a small-sized image pickup device that is suitably used for an image pickup device of a mobile phone, in particular, a drive mechanism comprising a SIMDM (Smooth Impact Drive Mechanism (registered trademark)) in order to realize functions such as autofocus and zoom. The present invention relates to a manufacturing method of an imaging device using an actuator (ultrasonic linear actuator) and a position adjusting jig for the imaging device used in the manufacturing method.

  As a small lens unit used in the imaging device of the cellular phone, a lens unit using the actuator as a drive mechanism has been put into practical use. This actuator transmits expansion and contraction of a piezoelectric element, which is an electromechanical conversion element, to a drive shaft, and moves a moving lens group engaged with the drive shaft with a predetermined frictional force when the piezoelectric element is expanded and contracted. It is moved using the speed difference. More specifically, in such an actuator, for example, by slowly extending the drive shaft, the moving lens group frictionally engaged with the drive shaft also moves, while the drive shaft exceeds the predetermined friction force. Is instantaneously reduced, the moving lens group is left in the extended position. By repeatedly performing such extension and contraction of the drive shaft, the actuator can move the movable lens group in the axial direction of the drive shaft.

  If there is an inclination of the actuator, particularly with respect to the sensor substrate of the drive shaft, a phenomenon that the focus state of the captured image differs at both ends of the image, so-called one-side blurring, occurs. For this reason, when the imaging apparatus is required to have high performance corresponding to the increase in the number of pixels, it is necessary to adjust the inclination of the drive shaft in the axial direction with respect to the frame when the drive shaft is held in the frame. As an example of adjusting the axial inclination of the drive shaft with respect to such a frame, there is one proposed in Patent Document 1, for example. In this device, the inclination of the drive shaft with respect to a predetermined reference line can be adjusted using an inclination adjustment mechanism.

  However, for example, in the case where the fixed lens group is held by the frame separately from the moving lens group, the fixed lens group is used when the optical axis of the moving lens group engaged with the drive shaft of the actuator is held on the frame of the actuator. When it is parallel to the optical axis of the fixed lens group by a predetermined distance with respect to the optical axis of the fixed lens group, the actuator drive axis is perpendicular to the axial direction with respect to the frame. It is necessary to make adjustments so that the two move along the same direction so that the two coincide with each other. However, in the one described in Patent Document 1, even if the inclination of the drive shaft of the actuator with respect to the predetermined reference line of the frame can be adjusted, The actuator cannot be moved in a direction perpendicular to its axial direction, and the actuator is perpendicular to its reference line relative to a predetermined reference line on the frame. And it is difficult to adjust the positional deviation of direction.

  Therefore, the present applicant has obtained an imaging apparatus manufacturing method capable of adjusting the axial inclination of the actuator with respect to a predetermined reference line of the frame and the position in the direction perpendicular to the reference line. In this manufacturing method, the actuator is arranged in the frame so that both ends of the actuator can move in the outer circumferential direction, both ends of the actuator are supported from both sides by the moving operation member, and the supported moving operation member is moved. The position of the actuator is adjusted with respect to a predetermined reference line of the frame by appropriately moving both ends of the actuator in the outer peripheral direction, and then the adhesive interposed between the end of the actuator and the frame is cured. After the end of the actuator is held on the frame, the tip of the supported moving operation member is pulled away from the end of the actuator.

JP 2009-25403 A

  However, when the tip of the supported moving operation member is pulled away from the end of the actuator, a large amount of hardened adhesive may adhere to the tip of the moving operation member. If a large amount of adhesive adheres to the separated moving operation member, the adhesive strength between the end of the actuator and the frame may be weakened. Further, when the next actuator is supported, it becomes difficult to support due to slippage, and there is a possibility that the adhesive adhered to the tip of the moving operation member may enter the frame and become dust.

  An object of the present invention is to provide an imaging device manufacturing method and an imaging device position adjustment jig in which an adhesive does not easily adhere to the tip of a moving operation member.

  In order to solve the above-mentioned problems, the present invention uses a position adjusting jig for an imaging apparatus having a movable operation member that can move, and is connected to an electromechanical conversion element so that a movable lens group is engaged with a predetermined frictional force. An imaging device manufacturing method in which an actuator having a shaft is disposed in a frame, and at least one end of one end and the other end in the axial direction of the actuator is held on the frame by an adhesive, and the moving operation member A wettability reducing portion formed so as to reduce wettability with respect to the adhesive as compared with the moving operation member main body at least at a distal end portion of the moving operation member main body provided at the end of the actuator disposed in the frame. And then moving the supported moving operation member to adjust the position of the end of the actuator supported by the wettability reducing unit, A method of manufacturing an imaging apparatus, comprising: curing an adhesive filled between an end portion of a held actuator and a frame; and then pulling the wettability reducing portion of the moving operation member away from the end portion of the actuator. provide.

  According to this, when the end of the actuator is held on the frame with the adhesive, even if the tip of the moving operation member that supports the end of the actuator comes into contact with the adhesive, the moving operation member gets wet with the tip. For example, the contact area with which the adhesive contacts can be reduced compared to a structure composed only of a moving operation member main body that does not have a wettability reducing portion, and adhesion that adheres to the tip of the moving operation member. The agent can be suppressed.

  As a result, the adhesive strength between the end of the actuator and the frame can be made less likely to be weak, and it can be made less likely to become difficult to support due to slippage when supporting the next actuator. The adhesive attached to the distal end portion of the moving operation member can enter the frame and become dust, thereby reducing the risk of impairing the function.

  In another aspect, in the method for manufacturing the imaging device, the wettability reducing portion may be configured by a fluororesin coating formed at least at a tip portion of the moving operation member main body.

  According to this, the contact area which an adhesive agent contacts can be reduced much more reliably, and the adhesive agent adhering to the front-end | tip part of a movement operation member can be suppressed much more reliably.

  In another aspect, in the method of manufacturing the imaging apparatus, the wettability reducing unit may be configured by oil applied to at least a tip portion of the moving operation member main body.

  According to this, the wettability reducing portion can be formed easily by applying oil to at least the tip of the moving operation member main body every time it is supported by the moving operation member at the end of the actuator or every certain number of times. A wettability reducing portion can be formed at low cost.

  In another aspect, in the method of manufacturing the imaging apparatus, a covering member that covers an end surface of the distal end side is provided on a distal end side of the drive shaft, and the moving operation member is connected to the drive shaft via the covering member. The tip of can be supported.

  According to this, when the actuator is supported by the moving operation member, the moving operation member can be supported by contacting the covering member, and the moving operation member does not need to be directly contacted by the tip of the drive shaft. Can prevent scratches.

  In order to solve the above problems, the present invention provides an actuator having a drive shaft connected to an electromechanical conversion element and engaged with a moving lens group with a predetermined frictional force in a frame. An image pickup apparatus position adjusting jig used in a method of manufacturing an image pickup apparatus that holds at least one end of one direction and the other end of the direction on the frame with an adhesive, the actuator being disposed in the frame An end portion that is held by the adhesive on the frame is supported by a tip portion, and includes at least one movement operation member that moves the actuator relative to the frame. Due to the material having lower wettability with respect to the adhesive than the material constituting the moving operation member main body, the moving operation member main body has less Providing position adjustment jig imaging apparatus characterized by even and a reducing wettability portion configured so as to cover the tip.

  According to this, when the end of the actuator is held on the frame with the adhesive, even if the tip of the moving operation member that supports the end of the actuator comes into contact with the adhesive, the moving operation member gets wet with the tip. Because it is equipped with a property reducing part, the contact area where the adhesive contacts can be reduced compared to the one composed only of the moving operation member main body that does not have the wettability reducing part, and the adhesive that adheres to the tip of the moving operation member Can be suppressed.

  Accordingly, the adhesive strength between the end of the actuator and the frame can be made less likely to be weak, and it can be made less likely to be difficult to support due to slipping when supporting the next actuator, It is possible to reduce the risk that the adhesive adhered to the distal end portion of the moving operation member enters the frame and becomes dust and impairs the function.

  The present invention can provide an imaging apparatus manufacturing method and an imaging apparatus position adjustment jig in which an adhesive hardly adheres to the distal end portion of the moving operation member.

It is a perspective view of the imaging device of one embodiment manufactured to the manufacturing method of the present invention. It is a disassembled perspective view of the imaging device of FIG. It is sectional drawing of the imaging device of FIG. 1A is a cross-sectional view of a state where a third group unit is attached to a rear frame, and FIG. 3B is a diagram illustrating an actuator weight facing an opposing hole of the rear frame. FIG. 6C is a cross-sectional view of the state where the first group unit is engaged with the drive shaft of the actuator, and FIG. 5C is a cross-sectional view of the state where the front frame is locked to the rear frame. It is sectional drawing at the time of adjusting the position of the drive shaft of an actuator using the position adjustment jig | tool which has a movement operation member. It is sectional drawing to which the principal part of FIG. 5 was expanded. It is a principal part expanded sectional view of a movement operation member. (A) is explanatory drawing of the adhesion state of the movement operation member provided with the wettability reduction part, and the adhesive agent in the hole for opposition, (b) is the movement operation member which does not have a wettability reduction part, and the hole for opposition It is explanatory drawing of an adhesion state with an inside adhesive agent. It is sectional explanatory drawing of the manufacturing method of the imaging device of other embodiment. It is sectional explanatory drawing of the manufacturing method of the imaging device of other embodiment. It is sectional explanatory drawing of the manufacturing method of the imaging device of other another embodiment.

  FIG. 1 is a perspective view of an imaging apparatus 1 according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of FIG. As shown in FIGS. 1 and 2, the imaging apparatus 1 includes a second group unit 2 that is a moving lens unit, a third group unit 3a and a first group unit 3b that are fixed lens units, and a second group unit. Actuators (ultrasonic linear actuators) 4 for driving 2 in the optical axis direction, housings 51, 52, 53 for accommodating the first to third group units 2, 3 a, 3 b and the actuator 4, and the sensor substrate 7 And. The imaging device 1 is preferably mounted on, for example, a mobile phone terminal device.

  The second group unit 2 includes optical elements 21 and 22 that constitute a moving lens group, a light shielding plate 24a disposed between the optical elements 21 and 22, and a second group unit holder that holds the optical elements 21 and 22. 25.

  The optical elements 21 and 22 are made of, for example, a plastic lens, and include a lens portion 211 on the inner diameter side that forms an optical path, and a holding portion 212 that holds the lens portion 211 from the outer peripheral side, and these are integrally molded. Note that both the front and rear surfaces of the holding unit 212 of this embodiment are formed on a plane perpendicular to the optical axis of the lens unit 211, respectively.

  As shown in FIG. 3, the second group unit holder 25 holds the holding portions 212 of the optical elements 21 and 22 on the inner peripheral side, and the outer peripheral side of the second group unit holder 25 is an actuator 4 described later. The drive shaft 42 is slidably engaged with a predetermined frictional force.

  The third group unit 3a includes an optical element 31a constituting a fixed lens group as shown in FIG. Like the optical elements 21 and 22 of the second group unit 2, the optical element 31a is made of, for example, a plastic lens, and is formed by integrally molding a lens portion 311a and a holding portion 312a.

  Then, as shown in FIG. 3, the third group unit 3 a is held immovably by a later-described rear frame 51 that is a holding member, and is disposed on the rear side of the second group unit 2.

  The first group unit 3b includes optical elements 31b and 31c constituting a fixed lens group as shown in FIG. 2, and light shielding plates 24b and 24c disposed between the optical elements 31b and 31c and on the front side, respectively. A first group unit holder 26 holding the optical elements 31b and 31c.

  Similar to the optical element 31a of the third group unit 3a, these optical elements 31b and 31c are made of, for example, a plastic lens, and are formed by integrally molding a lens portion 311b and a holding portion 312b.

  As shown in FIG. 3, the first group unit holder 26 holds the holding portions 312 of the optical elements 31 b and 31 c on the inner peripheral side, and the outer peripheral side is immovably held by a front frame 52 described later and is second. It is arranged on the front side of the group unit 2.

  For convenience of explanation, in FIGS. 2 and 3, the optical elements 21 and 22 of the second group unit 2 and the optical elements 31b and 31c of the first group unit 3b are respectively represented by two, and FIGS. 8 to FIG. 11, one is shown. 4 to 6 and 8 to 11, the light shielding plates 24a and 24b are omitted.

  The actuator 4 constitutes a driving mechanism for the second group unit 2 including the moving lens groups 21 and 22. For example, the actuator 4 is suitable for miniaturization previously proposed in Japanese Patent Laid-Open No. 2001-268951. It is called a SIDM (Smooth Impact Drive Mechanism (registered trademark)) actuator. 2 and 3, the actuator 4 has a drive shaft 42 connected to one end of a piezoelectric element 41 that is an electromechanical transducer that expands and contracts in the axial direction, and a weight 43 connected to the other end of the piezoelectric element 41. Then, the drive shaft 42 reciprocates due to the axial vibration of the piezoelectric element 41, and the holding member 24 of the second group unit 2 is engaged with the drive shaft 42 with a predetermined frictional force. The unit 2 is moved in the optical axis direction.

  More specifically, in this actuator 4, the displacement of the piezoelectric element 41 becomes a triangular wave by giving a rectangular wave with a predetermined duty ratio to the piezoelectric element 41, and the amplitude increases and decreases by changing the duty ratio of the rectangular wave. A triangular wave with a different slope is generated. The drive mechanism of the actuator 4 utilizes this. For example, when the drive shaft 42 is vibrated slowly, the second group unit 2 that is frictionally engaged with the drive shaft 42 also moves in response to the vibration and instantly exceeds the predetermined frictional force. When the drive shaft 42 is vibrated, the second group unit 2 is left as it is. The second group unit 2 can be moved in the axial direction of the drive shaft 42 by repeatedly performing such vibration in the axial direction of the drive shaft 42.

  The weight 43 is for generating a displacement due to expansion / contraction of the piezoelectric element 41 only on the drive shaft 42 side. In this embodiment, the weight 43 is formed of a cylindrical shape that is formed so that the outer diameter protrudes from the outer periphery of the piezoelectric element 41 to the entire outer periphery.

  The weight 43 may be omitted if the same function as that of the weight 43 can be exhibited by attaching the other end of the piezoelectric element 41 to the housing 5 or the like. Good.

  The piezoelectric element 41 is formed by laminating a plurality of piezoelectric layers and, as shown in FIG. 2, electrodes 411 and 412 of each piezoelectric layer are commonly drawn on a pair of side surfaces. The side electrodes 411 and 412 are connected to external connection terminals 46 and 47 via individual lead wires 44 and 45, respectively. The front ends of the external connection terminals 46 and 47 are soldered to a printed circuit board on the terminal device side of the mobile phone, or are fitted into a connector mounted on the printed circuit board.

  The drive shaft 42 is formed of a cylindrical shape. As shown in FIG. 3, the second group unit holder 25 of the second group unit 2 slides on the drive shaft 42 with a predetermined frictional force via the L-shaped spring member 6 shown in FIG. It is movably engaged.

  As shown in FIG. 2, the housing 5 includes frames 51 and 52 and a front cover 53. The frame includes a rear frame 51, which is a resin molded product, and a front frame 52 that is locked to the frame 51. The frame is combined with each other to form a box, and the second group unit is formed therein. 2, at least the third group unit 3a, the first group unit 3b, and the actuator 4 are accommodated.

  The frames 51 and 52 are made of a resin molded product having a shape in which the box formed by them is divided into two before and after being in the optical axis direction, and the side walls of the box have no through holes. The box is formed in an airtight manner.

  The rear frame 51 is generally formed of a rectangular shape, and is provided with a holding cylinder 514 whose axial direction is extended in the front-rear direction. The inner peripheral side of the holding cylinder 514 becomes a fitting hole 511 to hold the third group unit 3a.

  In this embodiment, a first concave portion 516 for preventing weight contact is provided on the outer peripheral wall of the holding cylinder 514 to prevent the outer periphery of the weight 43 of the actuator 4 from coming into contact.

  A counter hole 515 is provided in the vicinity of the first recess 516 on the outer peripheral side of the holding cylinder 514. The counter hole 515 has an inner diameter R1 smaller than an outer diameter R3 of the weight 43 as shown in FIG. In this embodiment, the outer diameter R3 of the weight 43 is about 1.5 mm, whereas the inner diameter R1 of the counter hole 515 is about 1.2 mm.

  As shown in FIG. 3, the weight 43 of the actuator 4 is disposed in front of the facing hole 515 so as to close the facing hole 515. The adhesive 8 is filled, whereby the weight 43 forming the other end of the actuator 4 is held by the rear frame 51.

  Examples of the adhesive 8 include an ultraviolet curable material and a thermosetting material. The adhesive 8 preferably has an elastic modulus of 10 megapascals (MPa) or less. When the elastic modulus exceeds 10 megapascals (MPa), for example, when an external load is applied to the frames 51 and 52, the adhesive hardly absorbs the external load, and the external load becomes the drive shaft of the actuator 4. This is because there is a high risk of being applied to 42. However, various adhesives can be used without being limited to these exemplified adhesives.

  The external connection terminals 46 and 47 are attached to the outer periphery of the rear frame 51 as shown in FIG.

  As shown in FIG. 2, the front frame 52 includes side walls 521 extending rearward from the entire outer peripheral side of the rectangular front side surface 522, and the second group unit 2 and the actuator 4 are accommodated therein by these side walls 521. An accommodating portion to be partitioned is formed.

  The side wall 521 is provided with a locking piece 521 b having elasticity as a locking portion for locking to the rear frame 51.

  Further, the front side surface 522 is formed with an opening 523 facing the outside where the first group unit 3b is arranged. In addition, an adjustment hole 526 into which the distal end portion of the drive shaft 42 forming one end of the actuator 4 is inserted is provided at one corner portion of the front frame 52 on the outer peripheral side of the opening 523.

  As shown in FIG. 4C, the adjustment hole 526 has an inner diameter R2 larger than the outer diameter R4 of the drive shaft 42, and the tip end portion of the drive shaft 42 inserted into the adjustment hole 526. A predetermined gap 526a is formed between the outer periphery of the drive shaft 42 and the inner peripheral wall of the adjustment hole 526 so that the tip of the drive shaft 42 can move in the radial direction (outer peripheral direction).

  In this embodiment, the outer diameter R4 of the drive shaft 42 is about 800 μm, whereas the inner diameter R2 of the adjustment hole 526 is about 900 μm.

  The gap 526a is filled with the adhesive 8 so as to hold the drive shaft 42 after the inclination adjustment with respect to the sensor substrate 7 is finished as will be described later. The adhesive 8 can be the same as that filled in the facing hole 515.

  Returning to FIG. 2, the front cover 53 is a sheet metal processed product provided on the electromagnetic shield and the appearance (design). After the frames 51 and 52 are assembled, they are covered from the front frame 52 side and provided on the side wall 531. The locking claws 531a are fixed to the front frame 52 by fitting into the locking recesses 521a formed on the side walls 521 of the front frame 52, respectively.

  Next, the sensor substrate 7 will be described. As shown in FIGS. 2 and 3, the sensor substrate 7 includes a rectangular plate-like substrate body 71 and an image sensor 72 disposed on the front side of the substrate body 71. The image sensor 72 includes a CCD type or CMOS type image sensor.

  In this embodiment, the substrate body 71 is composed of a synthetic resin plate, and is fixedly attached to the rear surface 51a of the rear frame 51 by a fixing means such as an adhesive. In this state, the image sensor 72 is disposed on the rear side of the third group unit 3a.

  Next, a method for manufacturing the imaging device 1 configured as described above using the position adjustment jig (positioning jig for imaging device) 9 of the present invention will be described. First, as shown in FIG. 4A, the third group unit 3a is attached to the rear frame 51 using, for example, the rear surface 51a of the rear frame 51 as a reference surface. Accordingly, the third group unit 3a is attached in a state where the optical axis O3 of the optical elements 21 and 22 is perpendicular to the rear surface 51a of the rear frame 51 and extends in the front-rear direction of the rear frame 51. In this embodiment, the optical axis O3 is set to a predetermined reference line of the frames 51 and 52, and the position of the actuator 4 is adjusted with respect to the optical axis O3.

  Next, as shown in FIG. 4 (b), the third group unit 3a is attached, and the counter hole 515 of the frame 51 is opposed to the weight 43 of the actuator 4 from the front side. The second group unit 2 is engaged with the drive shaft 42 via the spring member 6.

  Next, as shown in FIG. 4C, the front frame 52 is locked to the rear frame 51 so that the tip of the drive shaft 42 of the actuator 4 is inserted into the adjustment hole 526.

  Thus, the position unadjusted imaging device 10 in a state where the position of the drive shaft 42 of the actuator 4 with respect to the frames 51 and 52 has not been adjusted is formed.

  In this state, a predetermined gap 526a is formed between the outer periphery of the drive shaft 42 of the actuator 4 and the inner peripheral wall of the adjustment hole 526, and the drive shaft 42 is movable in the radial direction (outer peripheral direction). In addition, a gap is formed between the outer periphery of the weight 43 of the actuator 4 and the outer peripheral wall of the holding cylinder 514 of the rear frame 51 and the inner peripheral wall of the front frame 52.

  Next, the position adjustment of the drive shaft 42 of the actuator 4 is performed using the position adjustment jig 9. As shown in FIG. 5, the position adjustment jig 9 generally includes a first jig 91 and a second jig 92 facing the first jig 91.

  The first jig 91 includes a first jig main body 91a, a first movement operation member 93 as a movement operation member that supports the weight 43 of the actuator 4 from the lower side of the drawing and operates the rear end of the actuator 4, And an adhesive filling portion (not shown). The first jig main body 91 a includes a rear surface receiving portion 91 b that receives the rear surface 51 a of the rear frame 51.

  The rear surface receiving portion 91b forms a surface perpendicular to the direction of the axis O2 of the position adjusting jig 9 (the XX direction in FIG. 5).

  The first movement operation member 93 includes a contact portion 90 that contacts the weight 43 of the actuator 4 at the tip. In this embodiment, as shown in FIG. 7, the first movement operation member 93 covers a movement operation member main body 95 composed of a rod-shaped body made of metal such as stainless steel, and a distal end portion of the movement operation member main body 95. And a wettability reducing portion 96 arranged in this manner.

  The wettability reducing unit 96 is made of a material having lower wettability with respect to the adhesive 8 than the material (in this embodiment, stainless steel) that constitutes the moving operation member main body 95. That is, the wettability reducing unit 96 is configured to repel the adhesive and hardly adhere to the adhesive. In this embodiment, the wettability reducing unit 96 is composed of a fluororesin coating layer such as Teflon (registered trademark) formed so as to cover the entire moving operation member main body 95.

  The first moving operation member 93 is parallel to the direction of the axis O2 (XX direction) and the direction perpendicular to the direction of the axis O2 (hereinafter referred to as the axis vertical direction), that is, parallel to the rear surface receiving portion 91b. The first jig body 91a is held so as to be movable in the direction.

  The second jig 92 includes a second jig main body 92a, a second movement operation member 94 as a movement operation member that supports the drive shaft 42 of the actuator 4 from the upper side of the drawing and operates the tip of the actuator 4, And an adhesive filling portion (not shown). The second jig main body 92 a includes a pressing portion 92 b that presses the front frame 52.

  In this embodiment, the second movement operation member 94 is composed of the same configuration as the first movement operation member 93. The second moving operation member 94 is attached to the second jig main body 92a so as to be movable in the direction of the axis O2 (XX direction) and the axis vertical direction.

  Then, the position unadjusted imaging device 10 is arranged between the first jig 91 and the second jig 92 of the position adjusting jig 9 configured in this way, and the first jig 91 The frames 51 and 52 of the position-unadjusted imaging device 10 are held immovable by the rear surface receiving portion 91b of the tool main body 91a and the pressing portion 92b of the second jig main body 92a of the second jig 92.

  In this state, in this state, the optical axis O3 of the optical elements 21 and 22 of the third group unit 3a and the axis O2 of the position adjusting jig 9 are in the same direction. Further, an adhesive filling portion of the first jig 91 (not shown) is arranged in the vicinity of the facing hole 515 of the rear frame 51, and an adhesive filling portion of the second jig 92 (not shown) is used for adjusting the front frame 52. It is arranged in the vicinity of the hole 526.

  From this state, the first moving operation member 93 is moved to the actuator 4 side in the axial direction so that the front end portion is placed in the counter hole 515 and is brought into contact with and supported by the rear end surface of the weight 43 of the actuator 4. The second moving operation member 94 is moved to the actuator 4 side in the axial direction so that the tip end portion enters the adjustment hole 526 and is brought into contact with and supported by the tip end surface of the drive shaft 42 of the actuator 4.

  After that, the filler 8 is filled into the counter hole 515 from the adhesive filling portion of the first jig 91, and the outer periphery of the drive shaft 42 and the inner peripheral wall of the adjustment hole 526 from the adhesive filling portion of the second jig 92. Is filled with a filler 8 (see FIG. 3). At that time, it is only necessary to fill the filler 8 in one place of the counter hole 515, and the filling can be facilitated.

  Next, the inclination in the axial direction (axis O1) of the drive shaft 42 of the actuator 4 with respect to the axis O2 of the position adjusting jig 9 and the positional deviation in the axis vertical direction are adjusted.

  The tilt adjustment in the axial direction is performed by moving one of the first movement operation member 93 and the second movement operation member 94 in the direction perpendicular to the axis with respect to the other.

  For example, only the first movement operation member 93 is moved in the direction perpendicular to the axis without moving the second movement operation member 94. As a result, the weight 43 of the actuator 4 pivots and swings in the radial direction with respect to the rear frame 51 with the tip of the drive shaft 43 as a fulcrum, and the drive shaft 42 of the actuator 4 relative to the axis O2 of the position adjusting jig 9. The axial tilt can be changed. Then, the tilt adjustment is performed so that the optical axis of the optical element 21 of the second group unit 2 is in the same direction as the axis O2 of the position adjusting jig 9.

  Specifically, for example, the autocollimator is set so that the inclination of the reflected light from the surface parallel to the rear surface 51a of the rear frame 51 becomes zero. Then, the reflected light from the holding unit 212 formed on the plane of the optical element 21 of the second group unit 2 is received by the autocollimator, and the first moving operation member 93 is moved so that the inclination of the reflected light is eliminated. Then, the weight 43 of the actuator 4 is swung. In this way, the tilt adjustment is performed so that the optical axis of the optical element 21 of the second group unit 2 is in the same direction as the axis O2 of the position adjusting jig 9.

  Further, when the weight 43 swings, the first recess 516 of the rear frame 51 makes it difficult for the outer periphery of the weight 43 to come into contact with the rear frame 51, so that a sufficient adjustment range can be taken.

  Next, in the state in which the inclination is adjusted as described above, the positional deviation in the direction perpendicular to the axis is adjusted. The adjustment of the positional deviation in the vertical axis direction is performed by simultaneously operating both the first movement operation member 93 and the second movement operation member 94 in the same direction in the vertical axis direction. Specifically, for example, it is performed as follows.

  A minute mark (for example, a concave portion or a convex portion) that does not affect the optical performance is formed in advance at the center of the object-side surface (front surface) of the optical element 21 of the second group unit 2. Similarly, a minute mark that does not affect the optical performance is formed at the center of the object-side surface (front surface) of the optical element 31a of the third group unit 3a. Then, when observed from the object side, the first moving operation member 93 and the second moving operation member 94 are moved in the same direction so that the marks coincide with each other, and the weight 43 and the drive shaft 42 of the actuator 4 are moved. Are moved in the radial direction with respect to the rear frame 51 and the front frame 51, respectively.

  Thereby, the drive shaft 42 of the actuator 4 can be moved in the direction perpendicular to the axis without changing the inclination of the drive shaft 42 of the actuator 4 with respect to the axis O2 of the position adjusting jig 9, and the second group unit. The optical axis of the second optical element 21 can coincide with the optical axis O3 of the optical element 31a of the third group unit 3a.

  Then, after the adjustment, the filled filler 8 is irradiated with ultraviolet rays and cured. Accordingly, the rear end of the weight 43 that is the other end side in the axial direction of the actuator 4 can be held on the front frame 52, and the front end of the drive shaft 42 that is one end side can be held on the front frame 52.

  Thereafter, the first movement operation member 93 and the second movement operation member 94 are pulled away from the actuator 4 and removed from the facing hole 515. At that time, since the filler 8 is filled in the facing hole 515, the operation member 193 is composed only of a stainless steel operation member main body, for example, as shown in FIG. When the reduction portion is not provided, the filler 8 easily adheres to the tip portion thereof, and the operation member 193 is pulled out from the counter hole 515 in a state where a large amount of the filler 8 adheres to the operation member 193. Become.

  When the filler 8 is removed from the counter hole 515 in a state where a large amount of the filler 8 is attached to the operation member 193 as described above, the adhesive strength between the weight 43 on the other end side of the actuator 4 and the rear frame 51 may be weakened. is there. Further, when the operation member 193 supports the weight 43 of the next actuator 4, the operation member 193 slips and becomes difficult to support, and the adhesive 8 attached to the distal end portion of the operation member 193 is put in the frames 51 and 52. There is also a risk that it may become trash and impair the function.

  However, in this embodiment, since the first moving operation member 93 includes the wettability reducing portion 96 on the outer periphery of the tip portion thereof, the operation member not provided with the wettability reducing portion shown in FIG. Compared to 193, as shown in FIG. 8A, the filler 8 can be made difficult to adhere and the adhesion area can be reduced, and when the first moving operation member 93 is separated from the actuator 4, it adheres to the first moving operation member 93. The filler 8 can be reduced.

  Therefore, the weight 43 which is the other end side of the actuator 4 and the rear frame 51 can be reduced in the adhesive strength, and the first moving operation member 93 supports the weight 43 of the next actuator 4. The adhesive 8 attached to the tip of the first moving operation member 93 can be less likely to enter the frames 51 and 52.

  Next, the imaging device 1 in the unmounted state in which the first group unit 3b, the sensor substrate 7 and the front cover 53 are not yet mounted is taken out from the position adjusting jig 9, and the first group unit 3b is bonded to the front frame 52. Fix fixedly with agent.

  The first group unit 3b is attached to the front frame 52 by, for example, a mark displayed in advance at the center of the object side surface (front surface) of the optical element 31b of the first group unit 3b. This is performed so as to coincide with the mark displayed on the optical element 21.

  Accordingly, the optical axes of the optical elements 31b and 31c of the first group unit 3b are made to coincide with the optical axes of the optical elements 21 and 22 of the second group unit 2 and the optical axis O2 of the optical element 31a of the third group unit 3a. be able to.

  In this embodiment, the first group unit 3b is attached to the front frame 52 after the unmounted imaging device 1 is removed from the position adjustment jig 9. For example, the position adjustment jig 9 It can also be performed in a state where the imaging device 1 in the unmounted state is set, and can be changed as appropriate.

  Further, the sensor substrate 7 is attached to the rear surface 51a of the rear frame 51 with an adhesive, and the front cover 53 is mounted so as to cover the front frame 52. Thereby, the imaging device 1 shown in FIGS. 1 and 3 can be obtained.

  When the imaging device 1 is manufactured as described above, the third group unit 3a set as a predetermined reference line of the frame, for example, by swinging the front end of the drive shaft 42 of the actuator 4 or the rear end of the weight 43. The inclination of the axis O1 of the drive shaft 42 of the actuator 4 with respect to the optical axis O3 of the optical element 31a can be adjusted. Further, by moving the drive shaft 42 and the weight 43 of the actuator 4 together, the positional deviation of the optical element 31a of the third group unit 3a with respect to the optical axis O3 can be adjusted. Therefore, the inclination of the actuator in the axial direction with respect to the reference line of the frame and the positional deviation in the direction perpendicular to the reference line can be adjusted.

  In addition, since the adhesive 8 is filled between the outer periphery of the drive shaft 42 and the inner peripheral wall of the adjustment hole 526, rattling between the frames 51 and 52 and the movable lens groups 21 and 22 engaged with the actuator 4 is eliminated. Therefore, the movement and rotation of the movable lens groups 21 and 22 due to the rattling of both can be suppressed. Thereby, deterioration of optical performance can be prevented. Further, it is possible to prevent dust and dirt from entering between the outer periphery of the drive shaft 42 and the inner peripheral wall of the adjustment hole 526.

  In the above-described embodiment, the drive shaft 42 is supported by the second movement operation member 94 so that the second movement operation member 94 is in direct contact with the drive shaft 42. it can. For example, as shown in FIG. 9, the tip end surface of the drive shaft 42 may be covered with a covering member 142.

  Specifically, the covering member 142 includes a cylindrical portion 143 having a fitting recess 143 a that fits the tip of the drive shaft 42, and a flange portion 144 provided at the front end of the cylindrical portion 143. The fitting recess 143a is formed to have substantially the same diameter as the outer diameter of the drive shaft 42, and is configured so that there is substantially no gap between the outer periphery of the fitted drive shaft 42 and the inner peripheral wall of the fitting recess 143a. ing.

  The outer diameter of the cylindrical portion 143 is set smaller than the inner diameter of the adjustment hole 526 of the front frame 52, and a predetermined interval is provided between the outer periphery of the cylindrical portion 143 that enters the adjustment hole 526 and the inner peripheral wall of the adjustment hole 526. Thus, the cylindrical portion 143 can move in the radial direction (peripheral direction).

  The outer diameter of the flange 144 is set larger than the inner diameter of the adjustment hole 526 of the front frame 52.

  Prior to supporting the actuator 4 with the second moving operation member 94, the covering member 142 configured in this manner allows the tip of the drive shaft 42 to be fitted from the adjustment hole 526 of the front frame 52 into the fitting recess 143a. And coat. In this state, the actuator 4 is supported via the covering member 142 by bringing the second moving operation member 94 into contact with the covering member 142.

  In this state, for example, if only the first moving operation member 93 is moved in the direction perpendicular to the axis and the weight 43 is swung with the tip of the drive shaft 42 as a fulcrum, the inclination of the drive shaft 42 of the actuator 4 in the axial direction can be adjusted. . Further, if both the first movement operation member 93 and the second movement operation member 94 are moved in the same direction perpendicular to the axis, the drive shaft 42 of the actuator 4 can be moved in the axis perpendicular direction to adjust the positional deviation.

  Then, after the position adjustment, the covering member 142 is held on the front frame 52 by the adhesive 8. Therefore, in this case, the drive shaft 42 of the actuator 4 is indirectly held by the front frame 52 via the covering member 142.

  If comprised in this way, when supporting the drive shaft 42 which is one end of the actuator 4 with the 2nd movement operation member 94, the 2nd movement operation member 94 can be contact | abutted and supported by the coating | coated member 142, and 2nd movement operation The member 94 does not need to be in direct contact with the tip of the drive shaft 42, and it is possible to prevent the tip of the drive shaft 42 from being scratched. The covering member 142 is not limited to the shape that covers the distal end surface and the outer periphery of the distal end side of the drive shaft 42 as described above, but at least a portion of the distal end surface of the drive shaft 42 where the first movement operation member 93 abuts. Anything can be used as long as it is covered.

  Further, in the above embodiment, the first concave portion 516 for preventing the weight contact is provided only on the inner peripheral wall of the rear frame 51 corresponding to the outer periphery of the weight 43 of the actuator 4. For example, as shown in FIG. 10, the second recess 525 is replaced with the first recess 516 in the portion corresponding to the outer periphery of the weight 43 of the actuator 4 on the inner peripheral wall of the front frame 52, or together with the first recess 516. You may make it provide, and can change suitably.

  By providing such a second recess 525, the distance between the inner peripheral wall of the front frame 52 and the outer periphery of the weight 43 can be increased. As a result, when adjusting the position of the actuator 4, even if the weight 43 of the actuator 4 is moved to the inner peripheral wall side of the front frame 52, it is difficult to contact the inner peripheral wall of the front frame 52. It can be secured sufficiently. Further, by providing the second recess 525 in a part of the inner peripheral wall of the front frame 52, the space between the inner peripheral wall of the front frame 52 and the outer periphery of the weight 43 can be increased, so that the size of the entire apparatus can be reduced.

  In the above embodiment, the weight 43 of the actuator 4 is formed of a cylindrical shape. However, as shown in FIG. 11, for example, the weight 243 is a truncated cone whose diameter gradually decreases toward the rear end (the other end). You may comprise from what has a shape.

  In this way, when adjusting the inclination of the drive shaft 43 of the actuator 4 by swinging the weight 243 with the tip of the drive shaft 43 of the actuator 4 as a fulcrum, the rear end of the weight 243 compared to the cylindrical one However, it is difficult to make contact with the inner peripheral wall of the front frame 52 and the wall of the rear frame 51.

  Moreover, in the said embodiment, although the 1st movement operation member 93 and the 2nd movement operation member 94 are each provided with the wettability reduction part 96, it is not restricted to the thing of this form, 1st movement One of the operation member 93 and the second movement operation member 94 may be provided with the wettability reducing unit 96, and can be changed as appropriate.

  That is, in the above-described embodiment, the example of adhesion in the tilt adjustment and position adjustment (axis vertical direction adjustment) of the actuator drive shaft has been described. However, this adjustment is also applicable to the adjustment in the case of inclination adjustment and position adjustment alone. The operation members 93 and 94 of the invention can be naturally applied and can be changed as appropriate.

  Moreover, in the said embodiment, although the wettability reduction part 96 was comprised from the fluororesin coating layer, it can change suitably not only in this form. For example, you may comprise from the oil apply | coated to the outer periphery of the movement operation member main body 95. FIG. Examples of the oil include a lubricant such as dry surf (trade name). However, the oil is not limited to those exemplified above, and various oils can be used. Further, when the oil wettability reducing portion 96 is formed on the first movement operation member 93 or the second movement operation member 94, when the actuator 4 is supported by the first movement operation member 93 or the second movement operation member 94, What is necessary is just to make it apply | coat with a brush etc. every time or every fixed number of times. Accordingly, it is possible to form the wettability reducing portion 96 when supporting the actuator 4, and the wettability reducing portion 96 can be easily formed.

  In the above embodiment, the adhesive is filled before the actuator 4 is moved. However, the adhesive is not limited to this, and may be filled after the actuator 4 is moved, for example, and can be changed as appropriate.

  Moreover, in the said embodiment, although the 2nd and 3rd group unit which has a fixed lens group is provided, it can change suitably not only in the thing of this form. For example, the fixed lens group may not be provided, or one or more units having the fixed lens group may be provided.

DESCRIPTION OF SYMBOLS 1 Imaging device 2 1st group unit 3a 2nd group unit 3b 3rd group unit 4 Actuator 7 Sensor board 8 Adhesive 9 Position adjustment jig (position adjustment jig for imaging devices)
41 Piezoelectric element (electromechanical transducer)
42 Drive shaft 43 Weight 51 Rear frame 52 Front frame 90 Abutting portion 93 First movement operation member (movement operation member)
94 Second moving operation member (moving operation member)
95 Moving operation member main body 96 Wetting property reducing portion 515 Opposing hole 526 Adjustment hole

Claims (5)

Using an imaging apparatus position adjustment jig having a movable operation member that can move, an actuator having a drive shaft that is connected to the electromechanical conversion element and that engages the movable lens group with a predetermined frictional force is disposed in the frame. A method of manufacturing an imaging device in which at least one end portion in the axial direction of the actuator is held by an adhesive on a frame,
An actuator disposed in the frame by a wettability reducing portion formed so as to reduce wettability with respect to the adhesive more than at the distal end portion of the moving operation member main body provided on the moving operation member. Support the end of the
Thereafter, the movement operation member that is supported is moved, and the position of the end of the actuator supported by the wettability reduction unit is adjusted,
Next, the adhesive filled between the end portion of the supported actuator and the frame is cured, and then the wettability reducing portion of the moving operation member is separated from the end portion of the actuator. Manufacturing method.   The method of manufacturing an imaging apparatus according to claim 1, wherein the wettability reducing unit is configured by a fluororesin coating formed at least at a distal end portion of the moving operation member main body.   The method of manufacturing an imaging apparatus according to claim 1, wherein the wettability reducing unit is configured by oil applied to at least a tip of the moving operation member main body. A covering member that covers the end surface on the tip side is provided on the tip side of the drive shaft,
The method of manufacturing an imaging apparatus according to claim 1, wherein the moving operation member supports a tip end of the drive shaft via the covering member. An actuator having a drive shaft connected to the electromechanical conversion element and engaged with the movable lens group with a predetermined frictional force is disposed in the frame, and at least one end of one end and the other end in the axial direction of the actuator Is a position adjustment jig for an image pickup device used in a method for manufacturing an image pickup device that holds the image on the frame with an adhesive,
At least one movement operation member for moving the actuator relative to the frame by supporting an end portion of the actuator disposed in the frame to be held by the adhesive with the adhesive at the tip portion;
The movement operation member is configured to cover at least a tip portion of the movement operation member main body and a material having lower wettability with respect to the adhesive than a material constituting the movement operation member main body. A position adjusting jig for an image pickup apparatus, comprising a wettability reducing unit.

Images