JP2013105094A - Motor unit and optical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor unit having reduced vibration.SOLUTION: A motor unit comprises: a motor which generates driving force; a fixation member which fixes and supports the motor and holds a driving member driven by the driving force from the motor; a body part which supports the fixation member and a first vibration control member formed of a vibration control material lying between the motor and the fixation member so as to reduce the vibration between the motor and the fixation member; and a second vibration control member formed of a vibration control material lying between the fixation member and the body part so as to reduce the vibration between the fixation member and the body part.

Description

  The present invention relates to a motor unit and an optical apparatus.

There is a motor unit in which a lead screw, a tip bearing, a fixed frame, a thrust spring, and the like are formed of a damping material (see Patent Document 1).
[Patent Document 1] JP 2007-306755 A

  The parts formed by the damping member are expensive, resulting in an increase in product cost.

  As a first aspect of the present invention, a motor that generates a driving force, a motor that fixes and supports the motor, a fixing member that holds a driving member that is driven by the driving force from the motor, and a damping material are formed. A first damping member that is interposed between the motor and the fixing member to reduce vibration between the motor and the fixing member, a main body portion that supports the fixing member, and a damping material, and the fixing member and the main body A motor unit is provided that includes a second damping member that is interposed between the fixing member and the main body to reduce vibration between the fixing member and the main body.

  As a second aspect of the present invention, there is provided an optical apparatus including the above motor unit and an optical system that includes the motor unit and includes an optical system that is driven by a driving force of the motor with respect to a lens barrel as a main body. .

  The above summary of the present invention does not enumerate all necessary features of the present invention. Sub-combinations of these feature groups can also be an invention.

1 is a schematic cross-sectional view of a single-lens reflex camera 100. FIG. 4 is a perspective view around a motor module 400. FIG. 2 is a partially exploded perspective view of a lens barrel 200. FIG. FIG. 6 is a perspective view of a motor module 400 alone. It is a side view of the motor module 400 alone. It is a side view of the motor module 400 incorporated.

  Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. In addition, not all the combinations of features described in the embodiments are essential for the solving means of the invention.

  FIG. 1 is a schematic cross-sectional view of a single-lens reflex camera 100. The single lens reflex camera 100 includes a lens barrel 200 and a camera body 300. The lens barrel 200 is an example of an optical device.

  For the purpose of simplifying the description, in the following description, the object side of the lens barrel 200 attached to the camera body 300 is described as “front” or “front”. Further, the side far from the object with respect to the lens barrel 200 is described as “rear” or “rear surface”.

  The lens barrel 200 includes a fixed cylinder 201 and an optical system formed inside the fixed cylinder 201. The fixed cylinder 201 has a lens side mount portion 202 at the rear end, and is coupled to the body side mount portion 360 on the front surface of the camera body 300.

  The coupling between the lens side mount 202 and the body side mount 360 can be released by a predetermined operation. Therefore, another lens barrel 200 having the lens side mount portion 202 of the same standard can be exchanged and attached to the camera body 300.

  In the fixed cylinder 201, the first lens group 210, the second lens group 220, the third lens group 230, the fourth lens group 240, and the fifth lens group 250 are arranged along the optical axis X in order from the object side. Form an optical system. The first lens group 210, the second lens group 220, the third lens group 230, the fourth lens group 240, and the fifth lens group 250 are held by individual lens holding frames 212, 222, 232, 242, 252 respectively. The

  On the outer periphery of the fixed cylinder 201, a zoom operation ring 208, a front cover 204, a focusing operation ring 205, and a rear cover 203 are sequentially arranged from the object side. The front cover 204 and the rear cover 203 are fixed to the fixed cylinder 201. The zoom operation ring 208 and the focusing operation ring 205 can be individually rotated with respect to the fixed cylinder 201 around the optical axis X of the optical system.

  In the lens barrel 200, a lens holding frame 212 that holds the first lens group 210 is supported at the tip of the outer cylinder 214. The outer cylinder 214 moves back and forth in a direction parallel to the optical axis X with respect to the fixed cylinder 201, and moves the first lens group 210 in the optical axis X direction while changing the overall length of the lens barrel 200.

  A cover cylinder 216 that moves forward and backward with respect to the outer cylinder 214 is disposed coaxially with the outer cylinder 214 outside the outer cylinder 214. The cover cylinder 216 has a cam pin 211 on the outer peripheral surface near the rear end. The cam pin 211 is driven by the rotation of the zoom operation ring 208. As a result, the cover cylinder 216 advances and retreats in the optical axis X direction along with the outer cylinder 214.

  Therefore, the gap formed between the fixed cylinder 201 and the outer cylinder 214 when the outer cylinder 214 moves forward is covered with the cover cylinder 216. This prevents dust or the like from entering the lens barrel 200 from the gap between the fixed cylinder 201 and the outer cylinder 214.

  In the lens barrel 200, the lens holding frame 222 that holds the second lens group 220 is supported by a pair of guide bars that do not appear in the illustrated cross section so as to be movable in the optical axis X direction. The guide bar is arranged in parallel with the optical axis X. The lens holding frame 222 that holds the second lens group 220 has cam pins 221 that protrude outward from the outer peripheral surface.

  The tip of the cam pin 221 engages with a cam groove of a cam ring 260 disposed outside the fixed cylinder 201. Therefore, when the cam ring 260 rotates around the optical axis X, the second lens group 220 moves in the optical axis X direction. Accordingly, when the lens holding frame 222 moves along the guide bar, the second lens group 220 moves relative to the inner cylinder front portion 233 in the optical axis X direction.

  The pair of guide bars are fixed to the inner cylinder front part 233 and the inner cylinder rear part 253. When the inner cylinder front part 233 and the inner cylinder rear part 253 move relative to the fixed cylinder 201 in the optical axis X direction, the second lens group 220 moves together with the inner cylinder front part 233 in the optical axis X direction. Move to.

  In the lens barrel 200, the lens holding frame 232 that holds the third lens group 230 is fixed near the front end of the inner cylinder rear portion 253. The lens holding frame 252 that holds the fifth lens group 250 is fixed near the rear end of the same inner cylinder rear portion 253. The inner cylinder rear portion 253 holds a pair of guide bars different from the guide bar for guiding the second lens group 220 inside.

  Further, the inner cylinder rear portion 253 has a plurality of cam pins 231 on the outer peripheral surface. The cam pin 231 engages with the cam groove of the cam cylinder 270 disposed inside the fixed cylinder 201. Therefore, when the cam cylinder 270 receives the driving force and rotates around the optical axis X, the driving force is transmitted to the cam pin 231 and the inner cylinder rear portion 253 moves in a direction parallel to the optical axis X.

  Thereby, the third lens group 230 and the fifth lens group 250 supported by the inner cylinder rear part 253 also move together with the inner cylinder rear part 253. Further, the inner cylinder front part 233 integrally connected with the inner cylinder rear part 253 also moves in the optical axis X direction together with the inner cylinder rear part 253. Thus, since the third lens group 230 and the fifth lens group 250 are connected to each other by the inner cylinder rear portion 253, the distance between the third lens group 230 and the fifth lens group 250 does not change.

  The zoom operation ring 208 has an interlocking key 209 that extends to the inside of the fixed cylinder 201. When the zoom operation ring 208 rotates, the interlock key 209 rotates together with the zoom operation ring 208 and transmits the rotational driving force to the cam cylinder 270. Therefore, when the zoom operation ring 208 rotates, the cam cylinder 270 also rotates.

  The cam cylinder 270 includes a cam groove that is disposed inside the fixed cylinder 201 and engages with the cam pin 231, and a cam pin 271 that protrudes radially outward from the circumferential surface. The tip of the cam pin 271 passes through the cam groove formed in the fixed cylinder 201 and engages with the cam groove of the cam ring 260 disposed outside the fixed cylinder 201. Thereby, when the cam ring 260 rotates about the optical axis X, the cam cylinder 270 itself advances and retreats in the optical axis X direction with respect to the fixed cylinder 201.

  In the lens barrel 200, the lens holding frame 242 holding the fourth lens group 240 is supported by a pair of guide bars so as to be movable in the optical axis X direction. Therefore, when the inner cylinder rear portion 253 moves in the optical axis X direction, the fourth lens group 240 also moves in the optical axis X direction. When the lens holding frame 242 receives a driving force, the fourth lens group 240 moves relative to the third lens group 230 and the fifth lens group 250 in the optical axis X direction.

  In the lens barrel 200, the fourth lens group 240 includes a camera shake correction lens. The camera shake correction lens is displaced in a direction intersecting the optical axis X to compensate for the shake of the optical axis X of the optical system.

  The lens barrel 200 has a motor module 400 fixed to the fixed cylinder 201. The motor module 400 forms a motor unit 199 with the fixed cylinder 201 as a main body. The motor unit 199 drives an optical member related to focusing when the lens barrel 200 performs an autofocus operation.

  In the lens barrel 200 as described above, when the zoom operation ring 208 is rotated, the first lens group 210, the second lens group 220, the third lens group 230, the fourth lens group 240, and the fifth lens group 250 are included. Moving in the direction of the optical axis X, the optical system of the lens barrel 200 is zoomed. When the focusing operation ring 205 is rotated, or when the motor module 400 is operated according to an instruction from the control unit 322 of the camera body 300, the first lens group 210, the second lens group 220, and the third lens group. 230, a part of the fourth lens group 240 and the fifth lens group 250, for example, the fourth lens group 240 moves in the optical axis X direction, and changes the focal position of the optical system of the lens barrel 200.

  The camera body 300 includes a mirror unit 370 behind the body side mount portion 360 coupled to the lens side mount portion 202. Image light is incident on the mirror unit 370 through the lens barrel 200.

  The mirror unit 370 includes a main mirror 371 and a sub mirror 374. The main mirror 371 is supported by a main mirror holding frame 372 that is pivotally supported by a main mirror rotating shaft 373.

  The sub mirror 374 is supported by a sub mirror holding frame 375 that is pivotally supported from the main mirror holding frame 372 by a sub mirror rotating shaft 376. Therefore, the sub mirror holding frame 375 rotates with respect to the main mirror holding frame 372. Further, when the main mirror holding frame 372 rotates, the sub mirror holding frame 375 is also displaced together with the main mirror holding frame 372.

  When the front end of the main mirror holding frame 372 is lowered, the main mirror 371 stops at an observation position that obliquely crosses the incident light beam incident from the lens barrel 200. When the main mirror holding frame 372 is raised, the main mirror 371 becomes substantially horizontal and stops at a photographing position avoiding the incident light beam.

  In the camera body 300, a focusing screen 352 is disposed above the mirror unit 370, and a focusing optical system 380 is disposed below the mirror unit 370. A pentaprism 354 is disposed further above the focusing screen 352, and a finder optical system 356 is disposed behind the pentaprism 354. The rear end of the viewfinder optical system 356 is exposed as a viewfinder 350 on the back surface of the camera body 300.

  When the main mirror 371 is at the observation position, most of the incident light beam incident through the lens barrel 200 is reflected by the main mirror 371 and guided to the focusing screen 352. The focusing screen 352 is arranged at a position conjugate with the imaging surface of the imaging element 330 and visualizes an image formed by the optical system of the lens barrel 200. The image formed on the focusing screen 352 is observed from the viewfinder 350 through the pentaprism 354 and the viewfinder optical system 356.

  An image observed from the viewfinder 350 through the pentaprism 354 is observed as an erect image. Thereby, the user of the single-lens reflex camera 100 can determine the imaging range of the single-lens reflex camera 100.

  Further, a part of the incident light beam incident on the focusing screen 352 enters the photometric sensor 390 disposed in the vicinity of the finder optical system 356. The photometric sensor 390 detects the subject brightness from the received light flux and makes the control unit 322 refer to it. Thereby, the control unit 322 calculates an exposure condition when photographing.

  Further, the main mirror 371 has a half mirror region that transmits a part of the incident light beam. Therefore, a part of the incident light beam incident on the main mirror 371 at the observation position is transmitted through the half mirror region and incident on the sub mirror 374. The sub mirror 374 reflects a part of the incident light beam incident from the half mirror region toward the focusing optical system 380.

  The focusing optical system 380 guides a part of the incident incident light beam to the focus detection sensor 382. Thereby, the control unit 322 determines the target position of the lens that moves when the optical system of the lens barrel 200 is focused.

  In the camera body 300, a shutter unit 310, an optical filter 332, an image sensor 330, a body substrate 320, and a rear display unit 340 are sequentially arranged behind the mirror unit 370. A rear display unit 340 formed by a liquid crystal display panel or the like appears on the rear surface of the camera body 300. Electronic circuits such as a control unit 322 and an image processing unit 324 are mounted on the body substrate 320.

  When the release button is half-pressed in the single-lens reflex camera 100 as described above, the focus detection sensor 382 and the photometric sensor 390 are enabled, and the subject image can be captured under appropriate shooting conditions. Next, when the release button is fully pressed, the main mirror 371 and the sub mirror 374 move to the retracted position, and the shutter unit 310 is opened. Thereby, the incident light beam incident from the lens barrel 200 passes through the optical filter 332 and is photographed by the image sensor 330.

  FIG. 2 shows a state around the motor module 400 in the lens barrel 200 as seen from the lower side or slightly behind the lens barrel 200 with the rear cover 203 and the focusing operation ring 205 removed. In FIG. 2, the same elements as those in FIG.

  When the rear cover 203 and the focusing operation ring 205 are removed from the lens barrel 200, the motor module 400 fixed to the fixed barrel 201 appears. The motor module 400 includes a fixing member 410, an actuator 420, and a gear unit 430.

  In the motor module 400, the fixing member 410 has a bracket 412 at the upper end in the drawing. On the other hand, the fixed cylinder 201 serving as the main body portion has a rib portion 207 that protrudes in the radial direction from the outer peripheral surface. The motor module 400 is fixed to the fixed cylinder 201 by screwing a screw 452 inserted through the bracket 412 into the rib portion 207. The actuator 420 and the gear unit 430 are supported by the fixing member 410, respectively.

  The actuator 420 is an ultrasonic actuator using, for example, a piezoelectric material, and generates a rotational driving force when driving power is supplied. The gear unit 430 meshes the rotational driving force generated by the actuator 420 with the focusing operation ring 205 or the like while converting the rotational speed and torque.

  FIG. 3 is a partial exploded perspective view of the lens barrel 200. Elements common to those in FIGS. 1 and 2 are denoted by the same reference numerals, and redundant description is omitted.

  In the lens barrel 200, the front cover 204, the motor module 400 and the rear cover 203 are fixed to the fixed cylinder 201. A focusing operation ring 205 mounted on the outside of the motor module 400 between the front cover 204 and the rear cover 203 has an optical axis X with respect to the fixed cylinder 201, the front cover 204, the motor module 400, and the rear cover 203. Is attached to be rotatable around the center of rotation.

  The motor module 400 includes a fixing member 410, a gear unit 430, and a cover 440. The cover 440 is fixed to the fixing member 410 and covers a part of the gear unit 430 disposed in the vicinity of the actuator 420.

  The fixing member 410 includes a pair of brackets 412 including those shown in FIG. Further, each of the pair of brackets 412 has an insertion hole 411 through which the screw 452 is inserted. When fixing the motor module 400 to the fixed cylinder 201, the screw tips of the screws 452 inserted into the insertion holes of the bracket 412 are screwed into the rib portions 207 of the fixed cylinder 201. As a result, the fixing member 410 is fixed while being sandwiched between the rib portion 207 and the seating surface of the screw 452.

  In the lens barrel 200, an internal gear 206 is provided on the inner surface of the focusing operation ring 205. The internal gear 206 meshes with the gear unit 430 of the motor module 400. Thereby, the focusing operation ring 205 is rotated by the rotational driving force generated by the motor module 400. Further, when the focusing operation ring 205 is operated and rotated from the outside, the rotational driving force is transmitted to the gear unit 430 through the internal gear 206.

  FIG. 4 is a perspective view of the motor module 400 alone. FIG. 4 shows a state where the motor module 400 is viewed from the opposite side to FIG. In other words, a state in which the motor module 400 is viewed from the radially outer side of the lens barrel 200 is shown. In FIG. 4, the same reference numerals are assigned to the same elements as those in FIGS. 1 to 3, and redundant descriptions are omitted.

  In the motor module 400, the actuator 420 is fixed in the vicinity of the upper end of the fixing member 410 in the drawing by a screw 462 inserted from the opposite side of the fixing member 410. That is, the screw 462 is inserted through the fixing member 410 and a screw tip is screwed into a part of the actuator 420. Therefore, by sandwiching a part of the fixing member 410 between the seating surface of the screw 462 and the actuator 420, the actuator 420 is fixed to the fixing member 410.

  The actuator 420 may be fixed to the fixing member 410 by providing a hole through which the screw 462 is inserted in the actuator 420 and screwing the screw tip of the screw 462 into the fixing member. However, when the screw 462 is screwed into the fixing member 410 from the side opposite to the actuator 420, a space for the screw 462 does not have to be provided around the actuator 420. Therefore, the size around the actuator 420 can be reduced.

  The gear unit 430 includes an optical system drive gear 432 and an operation ring drive gear 434. The operation ring drive gear 434 meshes with the internal gear 206 from the inside of the focusing operation ring 205 and transmits the rotation of the focusing operation ring 205 to the gear unit 430 when the focusing operation ring 205 is rotated from the outside. .

  The optical system driving gear 432 rotates the cam ring 260 and the like both when the actuator 420 generates a rotational driving force and when the focusing operation ring 205 is rotated from the outside. Due to the driving force transmitted in this way, the optical component involved in focusing in the optical axis system of the lens barrel 200 moves in the optical axis X direction.

  FIG. 5 is a side view of the motor module 400 shown in FIG. 4 alone. Elements that are the same as those in FIG. 4 are given the same reference numerals, and redundant descriptions are omitted.

  In the motor module 400, a vibration washer 464 is sandwiched between the seat surface of the screw 462 and the fixing member 410. A vibration washer 466 is also sandwiched between the fixing member 410 and the actuator 420.

  Each of the damping washers 464 and 466 is an annular member having a through hole, and a screw 462 is inserted through the through hole. Thereby, each of the vibration damping washers 464 and 466 is interposed between the screw 462 and the fixing member 410 and between the actuator 420 and the fixing member 410 without dropping. Damping washers 464 and 466 are formed of a damping material.

  Examples of the damping material forming the damping washers 464 and 466 include composite type, ferromagnetic type, dislocation type or twin type damping alloys. These damping alloys efficiently absorb particularly high frequency vibrations due to internal loss or internal friction due to twin deformation or the like.

  Therefore, the vibration generated by the operating actuator 420 is absorbed by the damping washer 466 sandwiched between the actuator 420 and the fixed member 410, and the propagation of the vibration to the fixed member 410 is suppressed. Further, the vibration transmitted from the operating actuator 420 to the screw 462 is absorbed by the damping washer 464 sandwiched between the screw 462 and the fixing member 410, and the propagation of the vibration to the fixing member 410 is suppressed.

  Since the damping alloy has high rigidity unlike an elastomer or the like, even if the damping alloy is interposed in the support of the actuator 420, the supporting rigidity does not decrease. Therefore, the fluctuation of the distance between the shafts of the actuator 420 and the gear unit 430 is small, and the engagement play is not increased.

  In addition, as a composite type damping alloy, a Zn-Al alloy and flake graphite cast iron can be illustrated. Examples of the ferromagnetic damping alloy include high purity iron and high purity nickel. Examples of dislocation type damping alloys include Mg alloys and Mg—Zn alloys. Twin-type damping alloys include Mn—Cu alloy, Cu—Al—Ni alloy, Ti—Ni alloy, Fe—Mn—Si alloy, Fe—Ni—Co—Ti alloy, Fe—Ni—C alloy, Examples thereof include Fe—Cr—Ni—Mn—Si—Co alloys and Fe—Al alloys.

  Further, the outer shape of the vibration damping washers 464 and 466 is not limited to a circle. For example, some of the vibration damping washers 464 and 466 may have a shape that follows the shape of the surface of the actuator 420 that faces the fixing member 410. Similarly, some of the vibration damping washers 464 and 466 may have a shape that fills the gap between the actuator 420 and the fixing member 410.

  On the other hand, in the motor module 400, the fixing member 410 and the cover 440 do not generate vibrations themselves. Therefore, the cover 440 may be directly fastened to the fixing member 410 with the screw 442 without using a washer.

  In the illustrated example, the screw tip of the screw 442 inserted through the cover 440 is screwed into the fixing member 410. However, the screw 442 may be inserted into the fixing member 410 and screwed into the cover 440.

  FIG. 6 is a side view showing a state where the motor module 400 is attached to the fixed cylinder 201 which is the main body of the motor unit 199. FIG. 6 shows the motor module 400 viewed from the same direction as FIG.

  In FIG. 6, the motor module 400 is hatched for easy identification of the motor module 400 and the fixed cylinder 201. However, this hatching is not hatching that means a cross section. In FIG. 6, the same reference numerals are assigned to elements common to FIG. 5, and redundant description is omitted.

  In the motor unit 199, a damping washer 454 is sandwiched between the bracket 412 of the fixing member 410 and the seat surface of the screw 452. A vibration washer 456 is also sandwiched between the bracket 412 and the rib portion 207 of the fixed cylinder 201.

  Each of the damping washers 454 and 456 is an annular member having a through hole, and a screw 452 is inserted through the through hole. Thus, each of the vibration damping washers 454 and 456 is interposed between the seat surface and the bracket 412 and between the bracket 412 and the fixing member 410 without dropping. Damping washers 454 and 456 are formed of a damping material.

  As the damping material for forming the damping washer 454, 456, a composite type, a ferromagnetic type, a dislocation type, a twin type damping alloy, or the like can be used as in the case of the damping washers 464, 466. However, the damping washers 454 and 456 used for fixing to the fixed cylinder 201 and the damping washers 464 and 466 used for fixing the actuator 420 may be formed of different materials.

  Further, the shape of the vibration damping washers 454 and 456 is not limited to a circular shape, like the vibration damping washers 464 and 466. For example, some of the vibration damping washers 454 and 456 may have a shape that follows the shape of the surface of the fixing member 410 that faces the fixed cylinder 201. Similarly, some of the vibration damping washers 454 and 456 may have a shape that fills the gap between the fixed member 410 and the fixed cylinder 201.

  Due to the above structure, vibration generated in the motor module 400 is absorbed by the damping washers 454 and 456 and hardly propagates to the fixed cylinder 201. Since the fixed cylinder 201 has a large surface area, when vibration generated in the actuator 420 or the gear unit 430 propagates to the fixed cylinder 201, the vibration causes the surrounding air to vibrate and is recognized as noise.

  In addition, when shooting a moving image using the single-lens reflex camera 100, recording may be performed at the same time. If noise is generated when vibration propagates from the motor module 400 to the fixed cylinder 201, the noise is also recorded.

  In this respect, the motor unit 199 uses the vibration washer 454, 456, 464, 466 to fix the actuator 420 and the motor module 400, so that the internal structure of the lens barrel 200 and the fixed cylinder 201 are mechanically connected. Insulated. Therefore, the vibration generated in the motor module 400 is cut off, and the lens barrel 200 can be operated silently.

  Further, unlike the elastomer, the damping alloy has high rigidity. Therefore, even if the vibration washers 454 and 456 are interposed for fixing the motor module 400 to the fixed cylinder 201, the support rigidity does not decrease. Therefore, due to the above structure, the variation in the inter-axis distance between the gear unit 430 and the driven system is small.

  Furthermore, in the above example, the screw tip of the screw 452 inserted through the bracket 412 is screwed into the rib portion 207 of the fixed cylinder 201, but the screw tip of the screw 452 inserted through the rib portion 207 is screwed into the bracket 412. Also good.

  As described above, the lens barrel 200 of the single-lens reflex camera 100 has been described as an example of the optical apparatus. However, the above structure can be applied to a camera in which the lens barrel 200 and the camera body 300 are integrated. Furthermore, the same structure can be applied to the lens barrel 200 of a mirrorless camera that does not include the main mirror 371. Furthermore, the above structure can also be applied to other optical devices such as a telescope, a surveying instrument, and a microscope having a function of moving an optical member such as a lens in the optical axis X direction.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 100 Single-lens reflex camera, 199 Motor unit, 200 Lens barrel, 201 Fixed cylinder, 202 Lens side mount part, 203 Rear cover, 204 Front cover, 205 Focusing operation ring, 206 Internal gear, 207 Rib part, 208 Zoom operation ring , 209 Interlocking key, 210 First lens group, 211, 221, 231, 271 Cam pin, 212, 222, 232, 242, 252 Lens holding frame, 214 Outer cylinder, 216 Cover cylinder, 220 Second lens group, 230 Third Lens group, 233 Inner cylinder front part, 240 Fourth lens group, 250 Fifth lens group, 253 Inner cylinder rear part, 260 Cam ring, 270 Cam cylinder, 300 Camera body, 310 Shutter unit, 320 Body substrate, 322 Control part, 324 image processing unit, 330 imaging device, 332 optical filter 340 Rear display unit, 350 finder, 352 focusing screen, 354 pentaprism, 356 finder optical system, 360 body side mount unit, 370 mirror unit, 371 main mirror, 372 main mirror holding frame, 373 main mirror rotation axis, 374 Sub mirror, 375 Sub mirror holding frame, 376 Sub mirror rotation axis, 380 Focusing optical system, 382 Focus detection sensor, 390 Photometric sensor, 400 Motor module, 410 Fixing member, 411 Insertion hole, 412 Bracket, 420 Actuator, 430 Gear unit, 432 Optical system drive gear, 434 Operation ring drive gear, 440 Cover, 442, 452, 462 Screw, 454, 456, 464, 466 Damping washer

Claims (7)

A motor that generates driving force;
A fixed member that holds and supports the motor, and holds a driving member that is driven by a driving force from the motor;
A first damping member that is formed of a damping material and is interposed between the motor and the fixing member to reduce vibration between the motor and the fixing member; and a main body portion that supports the fixing member; ,
A motor unit comprising: a second damping member that is formed of a damping material and is interposed between the fixing member and the main body portion and reduces vibration between the fixing member and the main body portion. A first screw for fixing the motor to the fixing member by inserting into one of the motor and the fixing member and screwing in the other;
2. The first damping member according to claim 1, wherein the first damping member includes a portion inserted through the first screw and sandwiched between the first screw and the one and between the one and the other. Motor unit. A second screw for fixing the fixing member to the main body by inserting into one of the fixing member and the main body and screwing in the other;
The said 2nd damping member is inserted through said 2nd screw, and includes the part pinched | interposed between said 2nd screw and said one, and between said one and said other, respectively. 2. The motor unit according to 2.   The said 1st damping member contains the part which has a shape which fills between the surface which faces the said fixing member in the said motor, and the surface which faces the said motor in the said fixing member. The motor unit as described in any one.   The second damping member includes a portion having a shape filling a space between a surface of the fixing member facing the main body portion and a surface of the main body portion facing the fixing member. The motor unit according to any one of the above.   The motor unit according to any one of claims 1 to 5, wherein the first screw is inserted into the fixing member from a side opposite to the motor and is screwed into the motor.   An optical system comprising the motor unit according to any one of claims 1 to 6, and an optical system including an optical component that is driven by a driving force of the motor with respect to a lens barrel as the main body. machine.

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