JP2011209643A - Motor structure of camera shake correcting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor structure of a camera shake correcting device by which a motor is easily assembled and removed, and the direction and position or the like of a nut screwed in a feed screw of the motor is easily confirmed even after the assembly.SOLUTION: The motor structure includes the feed screw formed to rotate integrally with an output shaft of the motor, and a motor bracket fixed to the motor and extending in parallel with the feed screw. A guide slot extending in parallel with the feed screw is formed on the motor bracket, and a guide protrusion protrusively provided on the nut screwed in the feed screw is fitted into the guide slot.

Description

  The present invention relates to a motor structure of a camera shake correction apparatus that corrects camera shake by driving an optical element in an XY axis direction orthogonal to a photographing optical axis.

  2. Description of the Related Art Conventionally, in a camera shake correction apparatus that shifts an image sensor during camera shake correction mounted on a digital camera, a movable member for moving the image sensor along the XY axis is independently provided by two motors (actuators). Driving. The movable member was supported by the fixed frame member, and the two motors were screwed to the fixed frame member (Patent Document 1). As a structure for fixing the motor to the fixed frame member, a structure having a U-shaped bracket on the shaft side is also known (Patent Document 2).

JP 2007-128055 A JP 2006-309054 A

  However, in the conventional technique such as Patent Document 1, in order to screw the motor to the support member from the same direction as the shaft, a motor fixing portion is provided on the front surface of the motor, and the fixing portion has a direction parallel to the shaft. It was screwed from. Therefore, in the prior art, a structure for screwing in the shaft direction is required, and the movable range of the movable part must be secured by an extra thickness of the structure. In addition, after assembling, it is difficult to remove the motor by removing the screw fixing the motor unless other parts are also disassembled.

  Moreover, in the prior art using a U-shaped bracket as in Patent Document 2, one opposing portion is fixed to the front end surface of the motor housing, and the tip of the shaft passing through the hole in one opposing portion is the other opposing portion. Bearings. Even in a motor structure using a conventional U-shaped bracket, the motor is fixed using a U-shaped bracket portion orthogonal to the shaft and screwed in the same direction as the shaft. It was. Furthermore, if a U-shaped bracket is used for a motor that forms a feed screw on the shaft, and a nut is screwed onto this feed screw, and the drive nut is moved forward and backward, the nut is positioned within the U-shape of the U-shaped bracket. When attaching the nut, it is difficult to confirm the direction of the nut and the position on the shaft, and there is a problem that the installation work becomes difficult. Further, after the nut is attached, the drive nut cannot be removed unless the U-shaped bracket is removed from the motor. Therefore, it is difficult to replace the nut when a malfunction occurs in the nut.

  The present invention has been made in view of the above-described problems of the prior art, and it is easy to incorporate and remove a motor. Even after incorporation, confirmation of the direction and position of a nut screwed into a motor feed screw is confirmed. It is an object of the present invention to obtain a motor structure of a camera shake correction device that can be easily replaced and nuts can be easily replaced.

  In order to solve the above problems, a motor structure of a camera shake correction apparatus according to the present invention includes a vibration isolating element that forms a part of a photographing optical system and that can be shifted in a direction orthogonal to the optical axis, and the vibration isolating element includes A shake correction device mounted on the support member, wherein the motor that moves the vibration isolating element along a direction orthogonal to the optical axis is provided integrally with the output shaft of the motor. A feed screw formed to rotate; and a motor bracket fixed to the motor and extending in parallel with the feed screw. The motor bracket has a guide elongated hole extending in parallel with the feed screw. A guide protrusion, which is formed and protrudes from a nut screwed into the feed screw, is fitted in the guide long hole.

  It is practical that the motor bracket includes a guide portion that extends longer than the feed screw from the motor housing, and the tip end portion of the guide portion is fixed to the support member. Furthermore, it is practical that the guide slot is formed longer than the feed screw.

The other end side of the guide part is fixed to the housing of the motor.
It is preferable that the motor bracket has a fixed portion fixed to the front surface of the motor housing, and a guide portion bent from the fixed portion and extending in parallel with the feed screw.
Preferably, the guide portion of the motor bracket has a planar shape, and the tip end side of the output shaft is opened.

  The support member to which the motor bracket is fixed has a structure having a surface facing the feed screw in a state where the motor bracket is fixed.

  According to the motor structure of the camera shake correction device of the present invention, the motor bracket is provided with a guide portion extending in parallel with the motor feed screw, and the guide portion further guides the nut attached to the motor feed screw linearly. Since the long hole is formed, the nut can be easily assembled and disassembled, and the position and state of the nut can be easily confirmed from the guide long hole.

It is a perspective view shown in the state before assembling embodiment of the lens-barrel block and image pick-up element anti-vibration block to which the motor structure of the camera-shake correction apparatus of this invention is applied. In the same embodiment, it is the perspective view which decomposed | disassembled the image pick-up element anti-vibration block containing AF lens group. (A) is a front view, (B) is a plan view, and (C) is a right side view of the image sensor vibration isolation block of the same embodiment. It is a rear view of the image sensor anti-vibration block of the embodiment. The image sensor anti-vibration block of the embodiment is shown in a state in which a support base, a protection plate, and the like are removed, (A) is a front view, and (B) is a rear view. FIG. 4 is a cross-sectional view taken along a cutting line VI-VI in FIG. It is a side view of the motor part mounted in the image pick-up element anti-vibration block of the embodiment. It is a disassembled perspective view before attaching a drive nut to the motor. It is a perspective view of the state which assembled the motor.

  FIG. 1 is a perspective view of a zoom lens barrel to which the present invention is applied, in which a lens barrel block 10 and an image sensor vibration isolation block 100 are shown separately. FIG. 2 is an exploded view of the image sensor vibration isolation block 100. It is the shown perspective view.

  The lens barrel block 10 and the imaging element image stabilization block 100 of this embodiment are mounted on a so-called compact digital camera, and as a photographing optical system thereof, a first lens group and a second lens group (not shown) are sequentially arranged from the object side. , A shutter device, a third lens group, a fourth lens group (AF lens group), and a CCD or CMOS type image sensor (hereinafter referred to as “imaging device”) 101. Note that a low-pass filter (infrared cut filter) 105 is usually attached to the front surface of the image sensor 101.

  Among the above-described photographing optical systems, the first lens group, the second lens group, the shutter device, and the third lens group are provided in the lens barrel block 10, and the AF lens LAF, the low-pass filter 105, and the image sensor 101 are provided for the image sensor. The shaking block 100 is provided.

"Lens barrel block"
In the lens barrel block 10, a fixed lens barrel 11 is provided on the outermost diameter side, and the imaging element image stabilization block 100 is fixed to the rear end of the fixed lens barrel 11. The image pickup device anti-vibration block 100 moves the image pickup device 101 in two orthogonal directions along the plane perpendicular to the optical axis Z (the X-axis direction and the Y-axis direction) according to the magnitude and direction of shake (hand shake) applied to the digital camera. ) To suppress the shake of the subject image captured by the image sensor 101, and the image stabilization control is performed by a control circuit (not shown).

  In the following description, the “optical axis direction” is a direction parallel to the optical axis Z in the state in which the lens barrel block 10 and the image pickup element vibration isolating block 100 are assembled unless otherwise specified. The direction along the axis Z means the subject side as the front, and the direction opposite to the subject side or the image plane side as the rear. In the state where the camera is placed at the normal position (lateral position), the vertical direction in the plane orthogonal to the optical axis Z is defined as the Y axis, and the horizontal direction is defined as the X axis.

  A zoom motor 17 is supported on the side of the fixed lens barrel 11. The driving force of the zoom motor 17 is transmitted to a zoom driving mechanism (not shown) in the lens barrel block 10, and the lens group mounted in the fixed lens barrel 11 is moved back and forth in the optical axis direction to move the lens system. Change the focal length.

  The lens barrel block 10 has a telescopic structure in which a plurality of movable lens barrels 13 that are overlapped and supported in a fixed lens barrel 11 are extended and contracted. A lens barrier mechanism 15 that opens and closes the lens opening 13a is mounted at the distal end of the movable lens barrel 13 that is at the forefront when the lens barrel block 10 is extended. The lens barrier mechanism 15 is driven to open and close by the expansion and contraction movement of the lens barrel block 10, but is fully closed when the lens barrel block 10 is retracted (shortened) most (FIG. 1). Fully open when extended.

"Image sensor anti-vibration block"
The image pickup device anti-vibration block 100 moves the image pickup device 101 in the X-axis direction and the Y-axis direction orthogonal to the optical axis Z according to the magnitude and direction of shake (hand shake) applied to the digital camera. A stage device that suppresses the shake of the formed subject image is mounted, and control for suppressing the shake is performed by a control circuit (not shown). 2 is an exploded perspective view of the image sensor vibration isolation block 100 including the image sensor 101. FIG. 3 is a state in which the image sensor vibration isolation block 100 is assembled, (A) is a front view, and (B) is a plan view. FIG. 4C is a left side view, and FIG. 4 is a rear view.

  The imaging device 101 is connected to the imaging device FPC 102 that connects the imaging device 101 and a control circuit (not shown) on the back surface. Further, a mounting plate 103 is fixed to the back surface of the image sensor 101 so as to sandwich the image sensor FPC 102 therebetween. The imaging element 101 has a low-pass filter 105 mounted on the front surface via a shield sheet 104. The image sensor 101 is fitted into the box-shaped frame portion 110a of the Y base 110 from behind. At this time, three image sensor adjustment springs 106 are arranged between the mounting plate 103 and the frame portion 110 a, and screws 107 are inserted through the image sensor adjustment springs 106 through the through holes of the mounting plate 103, so that the Y base 110. Are screwed into corresponding screw holes formed in Each image sensor adjustment spring 106 is held in a compressed state.

  The Y base 110 that holds the image sensor 101 is supported so as to be slidable in the Y-axis direction with respect to the X base 120 via a Y guide shaft 111 disposed in parallel with the Y-axis direction. The Y guide shaft 111 is inserted into a bearing hole formed in the frame portion 110 a of the Y base 110 so as to be separated in the Y-axis direction, and both ends are fixed to the frame portion 120 a of the X base 120. The image pickup device FPC 102 of the image pickup device 101 passes through the frame portion 120 a of the X base 120 and is pulled out to the rear of the X base 120. It is pulled out sideways (front view left direction).

  The image pickup element FPC 102 extends upward from the image pickup element 101, and passes through a bent portion extending forward along the optical axis Z from the gap between the upper portion of the frame portion 120 a of the X base 120 and the frame portion 130 a of the support base 130. Then, after extending downward again, it extends to the side of the support base 130. The Y-axis direction and X-axis direction movements of the image sensor 101 allow the bending portion of the image sensor FPC 102 to bend.

  The image sensor FPC 102 is connected to an image sensor drive circuit, an image signal processing circuit, and the like (not shown) outside the image sensor image stabilization block 100.

  In the vicinity of the Y guide shaft 111, a Y biasing spring 112 that biases the Y base 110 to move downward in the Y axis direction with respect to the X base 120 is stretched. The Y biasing spring 112 is disposed in parallel with the Y guide shaft 111, and one end thereof is engaged with the Y base 110 and the other end is engaged with the X base 120.

  An auxiliary shaft 113 is disposed in front of the support base 130 in the vicinity of the upper right corner of the X base 120 in parallel with the Y guide shaft 111, and both ends of the auxiliary shaft 113 are fixed to the support base 130. A Y slider 114 is slidably supported along the auxiliary shaft 113 between both ends of the auxiliary shaft 113. A roller 114 a is attached to the lower end of the Y slider 114 via an axis parallel to the optical axis Z. A guide surface 110b formed in front of the Y base 110 and extending in parallel with the optical axis Z and the X axis direction is abutted on the roller 114a from above. Since the Y base 110 is biased downward by the biasing force of the Y biasing spring 112, the guide surface 110b is always pressed against the roller 114a. When the Y base 110 moves together with the X base 120 in the X-axis direction, the guide surface 110b moves while maintaining the contact between the guide surface 110b and the roller 114a while rolling the roller 114a.

  Further, on the upper front surface of the Y slider 114, a linkage piece 114b to which the driving force of the YSR motor 150 is transmitted is formed in parallel with the optical axis Z and the X axis. A U-groove 114c into which the feed screw 151a of the YSR motor 150 is inserted in a non-contact manner is formed at the approximate center of the linkage piece 114b in the optical axis Z direction. The U groove 114c is cut in the left direction from the right edge portion in parallel with the X axis. The linkage piece 114b is in contact with the drive nut 154 screwed to the feed screw 151a from the upper side to the lower side (FIGS. 5, 6, and 7). That is, the linkage piece 114 b and the drive nut 154 restrict the Y slider 114 from moving downward in the Y axis by the biasing force of the Y biasing spring 112. Accordingly, when the feed screw 151a rotates forward or backward, the drive nut 154 moves downward or upward according to the lead of the feed screw 151a, the Y slider 114 moves downward or upward together, and further, the Y base together with the Y slider 114 110 moves downward or upward. The drive nut 154 is a movable member that moves along the shaft 151 (feed screw 151a) in accordance with the rotation of the shaft 151 (feed screw 151a).

  The drive nut 154 has a female screw 154a formed substantially at the center, and a feed screw 151a is screwed into the female screw 154a. Further, a guide protrusion (guide key) 154b formed to project from the side of the drive nut 154 is fitted in the guide long hole 153c of the motor bracket 153 so as to be slidable in a rotationally restricted state. The motor bracket 153 has a guide portion 153b which is bent from a fixed portion 153a fixed to the front surface of the housing 152 of the YSR motor 150 and extends parallel to the feed screw 151a. The guide portion 153b is parallel to the feed screw 151a. A guide elongated hole 153c is formed in the upper portion. The guide long hole 153c is a rectilinear guide groove and rectilinear key groove penetrating the front and back of the guide portion 153b.

  At the upper end of the Y slider 114, a light shielding plate 114d is integrally projected in parallel with the optical axis Z and the Y axis. On the other hand, a U-shaped photo sensor 115 through which the light shielding plate 114d passes through the sensor gap is fixed to the support base 130. The photo sensor 115 detects the Y-axis direction position of the Y slider 114 with respect to the support base 130, that is, the Y-axis direction position of the image sensor 101.

  The X base 120 is formed in a frame shape, and bearings are projected on the upper surface of the upper frame portion at a predetermined interval in the X axis direction, and moved in the X axis direction by an X guide shaft 121 inserted through these bearings. It is supported freely. Since both ends of the X guide shaft 121 are supported by the support base 130, the X base 120 is supported so as to be slidable in the X axis direction with respect to the support base 130.

  In the vicinity of the X guide shaft 121, between the X base 120 and the support base 130, an X bias that elastically moves and biases the X base 120 relative to the support base 130 in the X axis direction, or in the left direction in FIG. A spring 122 is stretched.

  The X base 120 is integrally formed with a connecting piece 120b to which the driving force of the XSR motor 140 is transmitted in a projecting manner in parallel with the optical axis Z and the Y axis, on the upper right shoulder of the front that does not interfere with the Y base 110. . The linkage piece 120b is formed with a U-groove 120c through which the feed screw 141a of the XSR motor 140 is inserted without contact. The U groove 120c is cut downward from the upper edge portion in parallel with the Y axis. The linkage piece 120b is in contact with the drive nut 144 screwed to the feed screw 141a from the right side to the left side when viewed from the front (FIGS. 5, 6, and 7). That is, the linkage piece 120b and the drive nut 144 restrict the X base 120 from moving in the left direction of the X axis by the biasing force of the X biasing spring 122. Accordingly, when the feed screw 141a rotates forward or backward, the drive nut 144 moves in the left direction (direction approaching the XSR motor 140) or the right direction (direction away from the XSR motor 140) according to the lead of the feed screw 141a. Together with the nut 144, the X base 120 moves leftward or rightward in parallel with the X axis. The drive nut 144 is a movable member that moves along the shaft 141 (feed screw 141a) according to the rotation of the shaft 141 (feed screw 141a).

  The motor bracket 143 for mounting the XSR motor 140 has a flat guide portion 143b extending in parallel with the feed screw 141a from a fixed portion 143a fixed to the front surface of the housing 142 of the XSR motor 140. The guide portion 143b In addition, a long guide hole 143c is formed in parallel with the feed screw 141a. The guide portion 143b is formed longer than the feed screw 141, and the guide long hole 143c is formed longer than the feed screw 141a. The guide long hole 143c is a rectilinear guide groove and a rectilinear key groove penetrating the front and back of the guide portion 143b.

  The drive nut 144 is formed with a female screw portion 144a at a substantially central portion, and a feed screw 141a is screwed into the female screw portion 144a (see FIGS. 7, 8, and 9). The drive nut 144 is formed with guide protrusions 144b and 144c in the radial direction with the female screw portion 144a interposed therebetween. In the drawing, a guide protrusion 144b formed to project from the upper portion of the drive nut 144 and a guide long hole 143c of the motor bracket 143 are screwed into the feed screw 141a when the drive nut 144 is assembled to the motor bracket 143. In this case, the guide protrusion 144b is inserted into the guide long hole 143c before screwing (FIG. 9), and functions as a temporary rotation restricting structure. A guide projection 144c at the lower end of the drive nut 144 is fitted into a guide groove 131d formed in the bottom surface of the X motor housing box portion 131 in parallel with the X axis to restrict rotation.

  On the front surface of the frame portion 120a of the X base 120, a light shielding plate 120d is integrally projected in parallel with the optical axis Z and the X axis. On the other hand, a U-shaped photosensor 123 through which the light shielding plate 120d passes through the sensor gap is fixed to the support base 130. The photo sensor 123 detects the X-axis direction position of the X base 120 with respect to the support base 130, that is, the X-axis direction position of the image sensor 101.

  As described above, according to this camera shake correction apparatus, the imaging device 101 is supported by the Y base 110, the Y base 110 is supported so as to be movable in the Y-axis direction with respect to the X base 120, and the X base 120 is supported by the support base 130. Therefore, the imaging device 101 is supported by the support base 130 so as to be movable in the X-axis direction and the Y-axis direction, and is driven by the XSR motor 140 in the X-axis direction. Driven in the Y-axis direction by the YSR motor 150.

"AF lens"
The support stand 130 supports and drives the AF lens LAF at the upper left corner, which is a corner different from the corner where the XSR motor 140 and the YSR motor 150 are arranged when viewed from the optical axis Z direction (front). The mechanism which carries out is mounted (FIG. 1, FIG. 2). The AF lens LAF is supported by the lens holding portion 160a of the AF lens frame 160. The AF lens frame 160 has a pair of guide arm portions 160b and 160c extending from the central lens holding portion 160a in a substantially symmetrical direction across the optical axis Z. Of these, a guide hole 160d is formed at the tip of one guide arm portion 160b, and an AF lens guide shaft 161 is slidably inserted into the guide hole 160d. One end of the AF guide shaft 161 is fitted and supported in the bearing hole of the support base 130, and the other end is supported by the fixed lens barrel 11.

  A rotation restricting projection 160e provided at the tip of the other guide arm portion 160c of the AF lens frame 160 is slidably engaged with a rectilinear guide groove 130b formed on the inner peripheral surface of the support base 130. The longitudinal axis of the AF lens guide shaft 161 and the longitudinal direction of the rectilinear guide groove 130b are parallel to the optical axis Z, and the guide hole 160d and the rotation restricting projection 160e are formed by the AF lens guide shaft 161 and the rectilinear guide groove 22f. By being guided, the AF lens frame 160 is guided so as to be movable parallel to the optical axis Z.

  A feed screw 164 is formed on the shaft of the AF motor 163 that is an AF driving means, and a through hole of the motor bracket 165 fixed to the front end surface of the housing so that the feed screw 164 is parallel to the AF guide shaft 161. The screw passes through 165a and is screwed and fixed to the support table 130 by a screw screwed into the screw hole 130b (FIGS. 2 and 3B) of the support table 130.

  An AF nut 166 is screwed onto the feed screw 164, and the AF nut 166 is engaged with the AF lens frame 160 so as not to rotate. The leading end portion of the feed screw 164 passes through an AF guide hole 160 d formed in the AF lens frame 160.

  The AF lens frame 160 is urged by an AF urging spring 167 in a direction in which the AF lens LAF is separated from the image sensor 101, and abuts against the AF nut 166 from the image plane side. Therefore, when the feed screw 164 is rotationally driven by the AF motor 163, the AF nut 166 is restrained by the lead of the feed screw 164 and moves forward and backward in the optical axis Z direction, and the AF lens frame 160 abutted on the AF nut 166 is moved. Along with the movement in the optical axis Z direction, the position of the AF lens frame 160 in the optical axis direction changes. The AF motor 163 is a stepping motor.

  The AF lens frame 160 is integrally formed with a light shielding plate 160 f in the vicinity of the feed screw 164. On the other hand, a photo sensor 168 through which the light shielding plate 160f passes through the sensor gap when the AF lens frame 160 moves back and forth is fixed to the support base 130. The photo sensor 168 detects the absolute position of the light shielding plate 160f when the light shielding plate 160f passes a specific position in the optical axis direction, and drives (rotates) the AF motor 163 using the position at the time of passage as a reference position. The position of the AF lens frame 160 in the optical axis direction is controlled by counting the number. Note that a terminal plate 169 having a drive control terminal 169a is attached to the AF motor 163, and each terminal 169a is connected to a drive circuit and a control circuit (not shown) via a lens FPC 181.

"X, YSR motor"
The support stand 130 has a substantially rectangular shape when the frame portion 130a is viewed in the optical axis Z direction (front view), and drives the imaging device 101 in the X axis direction and the Y axis direction at the upper right corner of the frame portion 130a. As an actuator to be operated, an XSR motor 140 and a YSR motor 150 are arranged so that the shafts 141 and 151 abut each other in the X-axis direction and the Y-axis direction. 5A is a front view with the support 130 removed, FIG. 5B is a rear view thereof, and FIG. 6 is a cross-sectional view taken along section line VI-VI in FIG. 3B. In addition, although the XSR motor 140 and the YSR motor 150 of this embodiment are stepping motors, a brushless DC motor or the like can also be used.

  An XSR motor 140 and a YSR motor 150 are mounted on the upper right corner of the support base 130 from the direction orthogonal to the X-axis and Y-axis so that the feed screws 141a and 151a abut each other. Since the basic configurations of the XSR motor 140 and the YSR motor 150 are the same, the XSR motor 140 will be further described with reference to the side view shown in FIG. 7 and the perspective views shown in FIGS.

  A feed screw 141 a is integrally formed on the shaft 141 of the XSR motor 140. An L-shaped motor bracket 143 for fixing the XSR motor 140 to the support base 130 is fixed to the housing 142 of the XSR motor 140. The motor bracket 143 includes a fixed portion 143a fixed to the front end surface of the housing 142, and a guide portion 143b that is bent in an orthogonal direction from the fixed portion 143a and extends in parallel with the feed screw 141a and has a free end at the tip. I have. The fixed portion 143a has a shaft hole that fits into the bearing protruding from the housing 142, and a feed screw 141a projects from the shaft hole. The feed screw 141a may be formed separately from the shaft 141 and press-fitted into the shaft 141.

  In the guide portion 143b, a guide long hole 143c extending in parallel with the feed screw 141a, a small-diameter positioning hole 143d and a large diameter formed at the tip of the guide long hole 143c are separated from each other in the optical axis Z direction. Screw-through hole 143e. A guide projection 144b of a drive nut 144 screwed into the feed screw 141a is inserted into the guide long hole 143c, and a motor spring 145 is fitted between the fixed portion 143a and the drive nut 144.

  When the XSR motor 140 is housed in the X motor housing box 131, the drive nut 144 has the lower guide protrusion 144c fitted in the guide groove 131d, and the engagement of the drive nut 144 causes the feed screw 141a to rotate. Even though the rotation is restricted so as not to rotate, it is guided to move forward and backward according to the lead of the feed screw 141a. A motor spring 145 that urges the drive nut 144 in a direction for separating the drive nut 144 from the fixed portion 143a is fitted between the fixed portion 143a and the drive nut 144 on the feed screw 141a.

  A detent claw 143f protrudes from the tip of the fixed portion 143a of the motor bracket 143. The anti-rotation claw 143f protrudes from the outer appearance of the housing 142 and is engaged with a groove 131a formed on the bottom surface of the X motor storage box 131 of the support base 130 to prevent the XSR motor 140 from being lifted or swung. ing.

  The housing 142 of the XSR motor 140 is further provided with a terminal plate 146 having four terminals 146a exposed to the outside of the motor storage box portion 131 when stored in the motor storage box portion 131.

  The configuration of the YSR motor 150 is the same as that of the XSR motor 140. That is, the feed screw 151 a formed integrally with the shaft 151 is provided, and the fixing portion 153 a of the L-shaped motor bracket 153 is fixed to the front end surface of the housing 152. A long hole 153c, a small-diameter positioning hole 153d, and a large-diameter screw-through hole 153e are formed in the guide portion 153b of the motor bracket 153. The drive nut 154 screwed into the feed screw 151a has a guide projection 154b fitted into the guide elongated hole 153c, and the guide projection 154c fits into the guide groove 132d so that it does not rotate even if the feed screw 151a rotates. Guided by A motor spring 155 that urges the drive nut 154 in a direction to move away from the fixed portion 153a is fitted between the fixed portion 153a and the drive nut 154 on the feed screw 151a. The detent pawl 153f formed at the tip of the fixed portion 153a is engaged with a groove 132a formed on the bottom surface of the motor housing box portion 132 of the support base 130 to prevent the YSR motor 150 from being lifted or rotated. Yes. Further, the housing 152 of the YSR motor 150 is provided with a terminal plate 156 having four terminals 156a.

  The housings 142 and 152 are usually made of metal. The motor brackets 143 and 153 are formed of metal or synthetic resin, and the fixing portions 143a and 153a can be fixed to the front end surfaces of the housings 142 and 152 by screwing or bonding, and in the case of metal, can be further fixed by spot welding. The feed screws 141a and 151a and the drive nuts 144 and 154 are also preferably made of metal if durability is important, but one or both may be made of synthetic resin.

  The XSR motor 140 and the X and Y motor housing boxes 131 and 132 for housing the YSR motor 140 sandwich the rib 133 formed as a motor fixing portion on the front right shoulder of the support base 130, and the upper surface of the support base 130 and It is formed in the orthogonal direction along the side surface (FIG. 6). Grooves 131a and 132a and guide grooves 131d and 132d are formed at the bottoms of the X and Y motor housing box portions 131 and 132, respectively.

The X motor storage box portion 131 has a detachable opening 131b that is open almost entirely on the upper surface side of the support base 130, and a back surface opening 131c that is partially open on the back surface side (FIG. 2). From the rear opening 131c, the linkage piece 120b of the X base 120 is inserted into the X motor housing box portion 131. The rear opening 131c is formed in a shape that does not prevent the linkage piece 120b of the X base 120 from moving in the X-axis direction. From the attachment / detachment opening 131b, the XSR motor 140 is held so that the feed screw 141a is parallel to the X axis, is attached to and detached from the X motor housing box 131 from a direction orthogonal to the feed screw 141a, and is orthogonal to the feed screw 141a. The screw 147 can be screwed and unscrewed from the direction.
The feed screw 141a of the XSR motor 140 housed in the X motor housing box 131 is held in a non-contact state in the U groove 120c formed in the linkage piece 120b.

The Y motor storage box portion 132 has an attachment / detachment opening 132b that is substantially open on the side surface side of the support base 130, and a back opening 132c that is partially open on the back surface side. The connecting piece 114b of the Y slider 114 is inserted into the Y motor accommodation box portion 132 from the rear opening 132c. The rear opening 132c is formed in a shape and length that do not prevent the linkage piece 114b of the Y slider 114 from moving in the Y-axis direction. The YSR motor 150 is held from the attaching / detaching opening 132b so that the feed screw 151a is parallel to the Y axis, and is attached to and detached from the Y motor housing box 132 from a direction orthogonal to the feed screw 151a, and orthogonal to the feed screw 151a. The screw 147 can be screwed and unscrewed from the direction in which it moves.
The feed screw 151a of the YSR motor 150 housed in the Y motor housing box 132 is held in a non-contact state in the U groove 114c formed in the linkage piece 114b.

  The rib 133 located at the corner where the X and Y motor storage box portions 131 and 132 are abutted with each other has a motor fixing surface 134a to which the tip of the guide portion 143b of the motor bracket 143 faces when the XSR motor 140 is stored. Is formed on the upper surface (the upper surface side of the support base 130 in FIG. 2). A positioning projection 133a into which the positioning hole 143d is fitted projects from the motor fixing surface 134a, and a screw hole 133b into which the screw 147 is screwed through the screw through hole 143e extends in a direction perpendicular to the motor fixing surface 134a. It is formed (FIGS. 1 and 2). Further, on the rib 133, a motor fixing surface 134 b is formed on the side surface of the rib 133 (the side surface side in FIG. 2 of the support stand 130) that the tip of the guide portion 153 b of the motor bracket 153 faces when the YSR motor 150 is accommodated. The motor fixing surface 134b is provided with a positioning projection 133c into which the positioning hole 153d is fitted, and the screw hole 133d into which the screw 157 is screwed through the screw through hole 153e extends in a direction perpendicular to the motor fixing surface 134b. It is formed as follows.

  When the X and YSR motors 140 and 150 are accommodated in the X and Y motor accommodating box portions 131 and 132, the positioning holes 143d and 153d are fitted in these positioning projections 133a and 133c, respectively. The X and YSR motors 140 and 150 are respectively inserted into the X and Y motor housing box portions 131 and 132 through the attachment / detachment openings 131b and 132b in a direction orthogonal to the feed screws 141a and 151a. Then, the detent pawls 143f and 153f are fitted into the grooves 131a and 132a, the positioning holes 143d and 153d are fitted into the positioning projections 133a and 133b, and the guide portions 143b and 153b face the motor fixing surfaces 134a and 134b of the rib 133. Contact. Thereafter, the screws 147 and 157 are screwed into the screw holes 133b and 133d from the screw through holes 143e and 153e, and the guide portions 143b and 153b are fixed to the rib 133. Therefore, the X and YSR motors 140 and 150 are fixed to the support base 130. Is done.

  The X and Y motor housing boxes 131 and 132 are formed so that the housings 142 and 152 have a width that fits with a slight gap and the housings 142 and 152 do not touch the bottom when screwed. Yes. When the X and YSR motors 140 and 150 are housed in the X and Y motor housing boxes 131 and 132, the surfaces facing the tips of the feed screws 141 a and 151 a in the motor housing boxes 131 and 132 are fixed to the motor of the rib 133. The surface 134c is substantially orthogonal to the surface 134a, and the surface 134d is substantially orthogonal to the fixed surface 134b.

  The Y base 110 and the X base 120 are assembled to the support base 130 before the X and YSR motors 140 and 150 are accommodated in the X and Y motor accommodation box portions 131 and 132. When the X and YSR motors 140 and 150 are fitted into the X and Y motor housing box parts 131 and 132, the portions of the feed screws 141a and 151a protruding from the drive nuts 144 and 154 are replaced with the U grooves 120c of the linkage pieces 120b and 114b, It is inserted into the space 114c. As a result, the linkage pieces 120b and 114b stop in a state where they are pressed against the drive nuts 144 and 154 by the biasing forces of the X and Y biasing springs 122 and 112. At this time, the feed screws 141a and 151a are not in contact with the linkage pieces 120b and 114b and the rib 133. The wall surfaces 134c and 134d where the rib 133 faces the tips of the feed screws 141a and 151a (shafts 141 and 151) function as stopper surfaces that prevent the drive nuts 144 and 154 and the linkage pieces 120b and 114b from coming off (FIG. 6). ).

  In this embodiment, the motor brackets 143 and 153 are L-shaped, but in another embodiment, the fixing portion and the guide portion may be formed in a flat plate shape extending linearly. In this embodiment, the fixing portion is fixed to the outer peripheral surfaces of the housings 142 and 152 of the X and YSR motors 140 and 150 so that the guide portion extends in parallel with the feed screws 141a and 151a from the front ends of the housings 142 and 152. To form.

"FPC"
A protective plate 180 is screwed to the support base 130 from the rear, and a lens FPC 181 is mounted from the rear of the protective plate 180. The lens FPC 181 has terminal connection portions 181a, 181b, 181c connected to the terminals 146a, 156a of the X and YSR motors 140, 150 and the terminal 169a of the AF motor 163, and terminal portions connected to the image sensor FPC 102. The terminal connection portions 181a, 181b, and 181c and the terminals 146a, 156a, and 169a are soldered in advance at the stage of assembling the image sensor vibration isolation block 100. Thereafter, the image pickup device vibration isolation block 100 and the lens barrel block 10 are fixed. The zoom motor 17 and the lens FPC 181 are connected via a conduction cable 183 when the lens barrel block 10 and the image sensor vibration isolation block 100 are assembled. The conduction cable 183 is connected to the terminal 17a of the zoom motor 17 and the terminal 181d of the lens FPC 181 by soldering.

  Further, a terminal portion 18 of a shutter FPC connected to a built-in shutter device (not shown) is exposed from the fixed lens barrel 11 of the photographing lens block 10, and this terminal portion 18 is a shutter terminal portion 181e of the lens FPC 181. Soldered to (Fig. 1).

In the present embodiment, guide long holes 143c and 153c are provided in the guide portions 143b and 153b of the motor brackets 143 and 153 for fixing the X and YSR motors 140 and 150, and the drive nut 144 is provided in the guide long holes 143c and 153c. Since the guide protrusions 144b and 154b of 154 are inserted, the orientation of the drive nuts 144 and 154 is determined when the drive nuts 144 and 154 are attached, and the position of the drive nuts 144 and 154 can be seen in the axial direction. , X, YSR motors 140 and 150 can be easily attached.
Since the tip portions of the shafts 141 and 151 of the X and YSR motors 140 and 150 are open, after the drive nuts 144 and 154 are mounted and further assembled to the support base 140, some trouble occurs in the drive nuts 144 and 154. However, the drive nuts 144 and 154 can be removed and can be easily replaced.

  In the illustrated embodiment, the present invention is applied to the two X and YSR motors 140 and 150 for driving in the X and Y axis directions, but may be applied to only one of them.

DESCRIPTION OF SYMBOLS 10 Lens barrel block 11 Fixed lens barrel 15 Lens barrier mechanism 17 Zoom motor 18 Shutter terminal part 100 Image sensor anti-vibration block 101 Image sensor 102 Image sensor FPC
103 Mounting plate 104 Shield sheet 105 Low pass filter 106 Image sensor adjustment spring 107 Screw 110 Y base 110a Frame 110b Guide surface 111 Y guide shaft 112 Y biasing spring 113 Auxiliary shaft 114 Y slider 114a Roller 114b Linking piece 114c U groove 114d Light shielding Plate 115 Photo sensor 120 X base 120a Bearing 120b Linking piece 120c U groove 121 X guide shaft 122 X biasing spring 123 Photo sensor 130 Support base (fixing member)
131X motor housing box 131a groove 131d guide groove (rotation prevention groove, key groove)
132 Y motor storage box 132a groove 132d guide groove (rotation prevention groove, key groove)
133 Rib (Motor fixing part)
133a 133c Positioning projection 133b 133d Screw hole 134a 134b Fixed surface 134c 133d Wall surface (stopper surface)
140 XSR motor 141 shaft (output shaft)
141a Feed screw 142 Housing 143 Motor bracket 143a Fixing part 143b Guide part 143c Guide long hole (rotation prevention groove)
143d Positioning hole 143e Through hole 143f Non-rotating claw 144 Drive nut 144b 144c Guide protrusion 145 Motor spring 146 Terminal plate 150 YSR motor 151 Shaft (output shaft)
151a Feed screw 152 Housing 153 Motor bracket 153a Fixed portion 153b Guide portion 153c Guide long hole (rotation prevention groove)
153d Positioning hole 153e Through hole 153f Non-rotating claw 154 Drive nut 154b 154c Guide protrusion 155 Motor spring 156 Terminal plate 160 AF lens frame 163 AF motor 180 Protection plate 181 Lens FPC

Claims (7)

An anti-vibration element that forms part of the photographing optical system and that can be shifted in a direction orthogonal to the optical axis; and a support member that supports the anti-vibration element, and the anti-vibration element is orthogonal to the optical axis. Is a camera shake correction device mounted on the support member.
A lead screw formed to rotate integrally with the output shaft of the motor;
A motor bracket fixed to the motor and extending in parallel with the feed screw;
In the motor bracket, a guide long hole extending in parallel with the feed screw is formed,
A motor structure of a camera shake correction device, characterized in that a guide protrusion protruding from a nut screwed into the feed screw is fitted into the guide long hole.   The motor structure of the camera shake correction device according to claim 1, wherein the motor bracket includes a guide portion that extends from a housing of the motor longer than the feed screw, and a distal end portion of the guide portion is fixed to the support member. Motor structure of camera shake correction device.   The motor structure of the camera shake correction apparatus according to claim 2, wherein the guide long hole extends longer than the feed screw.   The motor structure of the camera shake correction apparatus according to any one of claims 1 to 3, wherein the guide portion has the other end fixed to a housing of the motor.   The motor structure of the camera shake correction device according to any one of claims 1 to 3, wherein the motor bracket includes a fixing portion fixed to a front surface of the motor housing, and a bending portion bent from the fixing portion. A motor structure of a camera shake correction device having a guide portion extending in parallel.   6. The motor structure of the camera shake correction apparatus according to claim 1, wherein the guide portion of the motor bracket has a planar shape, and the tip end side of the output shaft is open. Construction.   7. The motor structure of the camera shake correction apparatus according to claim 1, wherein the support member to which the motor bracket is fixed has a surface that faces the feed screw in a state where the motor bracket is fixed. Motor structure of the correction device.

Images