JP2023105544A - Connection member, lens barrel, and optical instrument - Google Patents

Abstract

To solve the problem in that: in order to move drive mechanisms driving in an optical axis direction and an in-plane direction orthogonal to an optical axis inside an optical instrument, a flexible printed wiring board movable following the drive mechanisms is required, and a sufficient length and plane or curved face area need to be provided to allow the movement of the flexible printed wiring board.SOLUTION: A connection member is arranged over a stationary member and a holding member, and has a contractible and expandable contracting and expanding part. The contracting and expanding part is alternately provided with a plurality of through slits intersecting an expansion direction and a plurality of circumferential connection parts connected with the plurality of through slits. The contracting and expanding part is further provided with a plurality of notch slits notched while facing each other in a direction parallel to the expansion direction and a plurality of inter-notch connection parts connected between the notch slits facing each other. The contracting and expanding part contracts and expands following the movement of the holding member.SELECTED DRAWING: Figure 6

Description

TECHNICAL FIELD The present invention relates to a connection member, and more particularly to a connection member for a stretchable flexible printed wiring board that electrically connects two relatively movable parts.

2. Description of the Related Art Lens barrels and optical devices such as digital still cameras, video cameras, and interchangeable lenses, for which miniaturization is demanded in recent years, are provided with a plurality of drive mechanisms such as an anti-vibration mechanism, a focus mechanism, and an aperture mechanism. Signals related to these driving mechanisms are connected to a main board on which circuit parts such as ICs are mounted by a plurality of flexible printed wiring boards by connectors, soldering, or the like. A flexible printed wiring board used for a plurality of driving mechanisms needs to follow the driving mechanism in the direction of the optical axis or in the in-plane direction perpendicular to the optical axis. Therefore, the flexible printed circuit board needs to be provided with a sufficient length and an area for movement in order to move. In addition, it is necessary to ensure a wide length and movable range for the flexible printed circuit board depending on the diameter and thickness of the lens barrel and optical equipment, and the arrangement of the optical adjustment mechanism and each drive mechanism. As a result, the flexible printed circuit board in the lens barrel tends to be large because the flexible printed circuit board has a movable portion and a flat or curved surface area. In addition, a flexible printed circuit board having a long overall length is difficult to remove in board manufacturing, resulting in an increase in cost.

Patent Literature 1 discloses a configuration of an expandable flexible printed circuit board having rhombic holes with different aspect ratios. A plurality of rhombus-shaped holes are formed in a grid pattern in which a diagonal line in a direction other than the extension direction is longer than a diagonal line in the extension direction. According to this configuration, there is no need to provide an expansion/contraction portion that is bent in a zigzag shape or the like in the thickness direction of the substrate, and expansion/contraction becomes possible while reducing the mounting thickness of the electronic device.

JP 2009-259929 A

However, the configuration disclosed in Japanese Patent Laid-Open No. 2002-200010 can only deal with minute expansion and contraction such as shaft rotation in the opening/closing mechanism. Therefore, it is difficult to ensure a wide movable range, such as the amount of movement of the moving group in the optical axis direction and the in-plane direction orthogonal to the optical axis used for the drive mechanism in the lens barrel.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides a connection member that can cope with the amount of movement of the lens while shortening the overall length of the flexible board by three-dimensional deformation of the expandable portion. It is another object of the present invention to provide an optical device which can be miniaturized with high space efficiency for arranging a flexible printed circuit board in a drive mechanism in the optical device.

A connection member according to the present invention has an extendable/contractible part disposed across a fixing member and a holding member, and the extendable/contractible part includes a plurality of through slits intersecting with the direction of expansion and contraction, and the plurality of through slits. A plurality of peripheral connecting portions connected to the slits are alternately provided, and the stretchable portion has a plurality of cut slits facing each other in a direction parallel to the stretchable direction, and the cuts facing each other. A plurality of inter-cut connecting portions connected between the slits are provided, and the elastic portion expands and contracts following the movement of the holding member.

Further, the lens barrel according to the present invention is provided with a connecting member, the connecting member is disposed across the fixing member and a holding member that holds the lens, and further has an expandable and contractable portion, The stretchable portion is alternately provided with a plurality of through slits intersecting with the stretchable direction and a plurality of peripheral connecting portions connected to the plurality of through slits. A plurality of cut slits facing each other in a parallel direction and a plurality of inter-cut connecting portions connected between the cut slits facing each other are provided, and the stretchable portion is perpendicular to the optical axis. It is characterized in that it expands and contracts following the movement of the holding member in the plane.

According to the present invention, it is possible to provide a connecting member that can realize a space-saving layout of a flexible printed circuit board in an optical device and a cost reduction associated with improved material removal by shortening the overall length of the flexible printed circuit board. can.

1A and 1B are a front perspective view and a rear perspective view of a lens barrel and a digital camera according to an embodiment of the present invention; FIG. 1 is a block diagram showing configurations of a lens barrel and a digital camera according to an embodiment of the present invention; FIG. 4 is a cross-sectional view of the retracted state of the lens barrel in the embodiment of the present invention; FIG. FIG. 4 is a cross-sectional view of the extended state of the lens barrel in the embodiment of the present invention; 3 is an exploded perspective view showing the mechanism of internal components in the lens barrel according to the embodiment of the present invention; FIG. 4 is an exploded perspective view showing the mechanism of the anti-vibration group of the lens barrel in the embodiment of the present invention; FIG. FIG. 4 is a perspective view showing a state before shifting of the flexible printed circuit board and the lens holding member of the anti-vibration group according to the first embodiment of the present invention; FIG. 4 is a perspective view showing a state in which the flexible printed circuit board and the lens holding member of the anti-vibration group are shifted to one side in the X-axis direction according to the first embodiment of the present invention; FIG. 4 is a perspective view showing a state in which the flexible printed circuit board and the lens holding member of the anti-vibration group are shifted to the other in the X-axis direction according to the first embodiment of the present invention; 1 is an exploded view of a flexible printed wiring board according to a first embodiment of the present invention; FIG. FIG. 4 is an enlarged view of the initial state of the expandable portion of the flexible printed wiring board according to the first embodiment of the present invention; FIG. 4 is an enlarged view of the stretched state of the stretchable portion of the flexible printed wiring board according to the first embodiment of the present invention; It is an enlarged view of the perspective view of the peripheral edge connection part and cover in embodiment of this invention. FIG. 4 is a cross-sectional view of a peripheral connecting portion and a cover in an embodiment of the present invention; 1 is a wiring pattern diagram of a conductor layer of a flexible printed wiring board according to an embodiment of the present invention; FIG. FIG. 10 is a perspective view showing a state before shifting of the flexible printed circuit board and the lens holding member of the anti-vibration group according to the second embodiment of the present invention; FIG. 10 is a perspective view showing a state in which the flexible printed wiring board and the lens holding member of the anti-vibration group according to the second embodiment of the present invention are shifted to one side in the X-axis direction; FIG. 10 is a perspective view showing a state in which the flexible printed circuit board and the lens holding member of the anti-vibration group are shifted to the other in the X-axis direction according to the second embodiment of the present invention; FIG. 4 is an enlarged view showing an attached state of a biasing member of the anti-vibration group according to the embodiment of the present invention; FIG. 11 is an enlarged view showing a mounting state of a flexible printed circuit board, which is a biasing member of the anti-vibration group according to the third embodiment of the present invention; FIG. 10 is a perspective view of a flexible printed circuit board and a lens holding member of a conventional anti-vibration group;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals throughout the drawings indicate the same or corresponding parts. In this embodiment, an interchangeable lens, which is an example of an optical device, will be described.

(First embodiment)
FIG. 1 shows the appearance of a lens barrel 101 and a digital camera (hereinafter referred to as camera body) 1 to which the lens barrel 101 is detachably attached, which is an embodiment of the present invention. 1(a) and 1(b) are perspective views showing the front side and the back side, respectively. As shown in FIG. 1A, the optical axis direction of the imaging optical system accommodated in the lens barrel 101 is defined as the X-axis direction, and the directions orthogonal to this are the Z-axis direction (horizontal direction) and the Y-axis direction. direction (vertical direction). Hereinafter, the Z-axis direction and the Y-axis direction are collectively referred to as the Z/Y-axis direction. The direction of rotation about the Z-axis is defined as the pitch direction, and the direction of rotation about the Y-axis is defined as the yaw direction. The pitch direction and the yaw direction (hereinafter collectively referred to as the pitch/yaw direction) are directions of rotation about two axes, the Z axis and the Y axis, which are perpendicular to each other.

A grip portion 2 for a user to grip the camera body 1 by hand is provided on the left side (right side when viewed from the back) of the camera body 1 when viewed from the front (object side). A power supply operation unit 3 is arranged on the upper surface of the camera body 1 . When the user turns on the power operation unit 3 while the camera body 1 is in the power-off state, the camera body 1 is turned on and imaging becomes possible. When the user turns off the power operation unit 3 while the camera body 1 is in the power-on state, the camera body 1 is turned off.

Furthermore, a mode dial 4 , a release button 5 and an accessory shoe 6 are provided on the upper surface of the camera body 1 . The imaging mode can be switched by the user rotating the mode dial 4 . The shooting modes include a manual still image shooting mode in which the user can arbitrarily set shooting conditions such as shutter speed and aperture value, an automatic still image shooting mode that automatically obtains an appropriate amount of exposure, and a video shooting mode. A moving image capturing mode and the like are included. In addition, by half-pressing the release button 5, the user can instruct imaging preparation operations such as autofocus and automatic exposure control, and by fully-pressing, it is possible to instruct imaging. An accessory such as an external flash is detachably attached to the accessory shoe 6 . In addition, the camera body 1 is provided with an imaging device that photoelectrically converts (captures) an object image formed by the imaging optical system in the lens barrel 101 .

The lens barrel 101 is mechanically and electrically connected to the camera mount 7 provided on the camera body 1 via the lens mount 102 . As described above, the lens barrel 101 accommodates an imaging optical system that forms an image of a subject by forming an image of light from the subject.

As shown in FIG. 1(b), a rear operation section 8 and a display section 9 are provided on the rear surface of the camera body 1. As shown in FIG. The back operation unit 8 includes a plurality of buttons and dials to which various functions are assigned. When the power of the camera 1 is on and the still image or moving image capturing mode is set, the display unit 9 displays a through image of the subject image captured by the image sensor. Also, the display unit 9 displays imaging parameters indicating imaging conditions such as shutter speed and aperture value, and the user operates the rear operation unit 8 while viewing the display to change the setting values of the imaging parameters. Is possible. The back operation unit 8 includes a playback button for instructing playback of the recorded captured image. When the user operates the playback button, the captured image is played back and displayed on the display unit 9 .

FIG. 2 is a block diagram showing the electrical and optical configurations of the lens barrel 101 and camera body 1 in this embodiment. The camera body 1 has a power supply unit 10 that supplies power to the camera body 1 and the lens barrel 101, and the touch panel functions of the power operation unit 3, mode dial 4, release button 5, rear operation unit 8, and display unit 9 described above. and an operation unit 11 including The camera body 1 and the lens barrel 101 are controlled as a system as a whole by the camera control section 12 provided in the camera body 1 and the lens control section 104 provided in the lens barrel 101 cooperating with each other. will be The camera control unit 12 reads and executes computer programs stored in the storage unit 13 . At this time, the camera control unit 12 communicates various control signals, data, etc. with the lens control unit 104 via the communication terminal of the electrical contact 105 provided on the lens mount 102 . The electrical contact 105 includes a power terminal that supplies power from the power supply section 10 described above to the lens barrel 101 .

The imaging optical system of the lens barrel 101 includes a focus group 201 including a focus lens that moves along the optical axis to adjust the focus, an aperture group 401 that adjusts the amount of light, and an anti-vibration element that reduces image blur. has a vibration reduction group 501 including a shift lens of . The anti-vibration group 501 moves (shifts) the shift lens in the Z/Y-axis directions orthogonal to the optical axis to perform an anti-vibration operation to reduce image blur. Further, the lens barrel 101 has a focus driving section 301 that drives the focus group 201 , an aperture driving section 402 that drives the diaphragm group 401 , and an anti-vibration driving section 502 that drives the anti-vibration group 501 .

The camera body 1 has a shutter unit 14, a shutter driving section 15, an imaging element 16, an image processing section 17, and the camera control section 12 described above. The shutter unit 14 controls the amount of light collected by the imaging optical system in the lens barrel 101 and exposed by the imaging device 16 . The imaging device 16 photoelectrically converts a subject image formed by the imaging optical system and outputs an imaging signal. The image processing unit 17 generates an image signal after performing various image processing on the imaging signal. The display unit 9 displays an image signal (through image) output from the image processing unit 17, displays imaging parameters as described above, and displays captured images recorded in the storage unit 13 or a recording medium (not shown). or play back.

The camera control unit 12 controls driving of the focus group 201 in accordance with an imaging preparation operation (half-press operation of the release button 5) in the operation unit 11. FIG. For example, when an autofocus operation is instructed, the focus detection unit 18 determines the focus state of the subject image formed by the imaging device 16 based on the image signal generated by the image processing unit 17, A focus signal is generated and transmitted to the camera control unit 12 . At the same time, the focus drive section 301 detects the current position of the focus group 201 and transmits the signal to the camera control section 12 via the lens control section 104 . The camera control unit 12 compares the focus state of the subject image with the current position of the focus group 201 , calculates the focus drive amount from the shift amount, and transmits the calculated amount to the lens control unit 104 . Then, the lens control unit 104 drives and controls the focus group 201 to the target position via the focus driving unit 301 to correct defocus of the subject image.

The focus drive unit 301 includes a cam cylinder, a focus motor 311 , a reduction gear that connects the cam cylinder and the focus motor 311 , and a photointerrupter that detects the origin position of the focus group 201 , which will be described later in detail. Generally, a stepping motor, which is a type of actuator, is often used as the focus motor 311 . However, since the stepping motor can only control the relative driving amount, the current position of the focus group 201 is indefinite when the power is off. Therefore, when the user turns on the power supply operation unit 3, control is required to move the focus group 201 to the origin position and execute origin detection processing. The control of such origin detection processing is a well-known technology that has been adopted in many optical devices, and therefore description thereof will be omitted here. A DC motor or an ultrasonic motor having an encoder may be employed as the actuator. In addition, the photointerrupter directly receives the light emitted from the light-emitting part at the light-receiving part, but instead of this, a photoreflector for receiving the reflected light from the reflecting surface or a brush in contact with the conductive pattern is used. may be used.

In addition, the camera control unit 12 controls driving of the diaphragm group 401 and the shutter unit 14 via the diaphragm driving unit 402 and the shutter driving unit 15 according to the setting values of the diaphragm value and the shutter speed received from the operation unit 11. do. For example, when an automatic exposure control operation is instructed, the camera control section 12 receives a luminance signal generated by the image processing section 17 and performs photometric calculation. Based on the photometry calculation result, the camera control unit 12 controls the drive of the diaphragm group 401 in accordance with the image pickup instruction operation (full-press operation of the release button 5) in the operation unit 11. FIG. At the same time, the camera control section 12 controls driving of the shutter unit 14 via the shutter driving section 15 and performs exposure processing by the imaging device 16 .

The camera body 1 has a pitch shake detection section 19 and a yaw shake detection section 20 as shake detection means capable of detecting image shake such as camera shake caused by the user. The pitch vibration detection unit 19 and the yaw vibration detection unit 20 use an angular velocity sensor (vibration gyro) and an angular acceleration sensor, respectively, to detect the pitch direction (rotational direction around the Z-axis) and the yaw direction (rotational direction around the Y-axis). It detects image blur and outputs a shake signal. The camera control unit 12 uses the shake signal from the pitch shake detection unit 19 to calculate the shift position of the anti-vibration group 501 (shift lens) in the Y-axis direction. Similarly, the camera control unit 12 uses the vibration signal from the yaw vibration detection unit 20 to calculate the shift position of the anti-vibration group 501 in the Z-axis direction. Then, the camera control unit 12 drives and controls the anti-vibration group 501 to the target position according to the calculated shift position in the pitch/yaw direction, and performs anti-vibration operation to reduce image blurring during exposure and through image display. conduct.

Next, the positional relationship of the components in the lens barrel 101 and the camera body 1 in this embodiment will be described with reference to FIGS. 3, 4, and 5. FIG. 3 and 4 are cross-sectional views on the XY plane including the optical axis, showing the collapsed state and extended state of the focus group 201. FIG. Since the center line shown here substantially coincides with the optical axis determined by the imaging optical system, it is synonymous with the optical axis below. FIG. 5 is an exploded perspective view showing the mechanism of internal components in the lens barrel 101, showing the collapsed state of the focus group 201. As shown in FIG.

The fixed barrel 106 is a fixed member that holds the first fixed lens 611 on the inner peripheral side and holds the rectilinear guide barrel 107 on the front side surface. The rectilinear guide cylinder 107 is a fixed member that accommodates the focus group 201 on the inner peripheral side and rotatably holds the cam cylinder 108 on the outer peripheral side. The cam barrel 108 is biased in the optical axis direction by an elastic member 109, and the surface on the back side (camera body 1 side) is in close contact with the fixed barrel 106 so as to be slidable.

The focus motor 311 is fixed to the front surface of the fixed barrel 106 so that its rotation axis is parallel to the optical axis. On the other hand, the reduction gear (not shown) is composed of a plurality of gears, each of which is held rotatably with respect to the rear surface of the fixed cylinder 106 . Further, a cam cylinder gear (not shown) is fixed to the outer peripheral surface of the cam cylinder 108 so as to be connected with the reduction gear. When the focus motor 311 is rotationally driven, its driving force is reduced in speed through the reduction gear and the cam barrel gear and transmitted to the cam barrel 108 . Thus, the cam cylinder 108 rotates about the optical axis while being restricted from moving in the optical axis direction.

The focus group 201 is inserted and incorporated into the inner peripheral side of the rectilinear guide cylinder 107 from the front side. The rectilinear guide tube 107 is formed with a rectilinear guide groove that restricts the movement of the focus group 201 in the rotational direction and guides the rectilinear movement in the optical axis direction. Also, the cam barrel 108 is formed with a cam groove having a linear locus in the rotational direction corresponding to the stroke of the focus group 201 . Three moving rollers 231 are fixed to the focus group 201 at equal intervals of 120 degrees, and are engaged with the rectilinear guide groove and the cam groove. When the cam cylinder 108 rotates, the moving roller 231 advances and retreats the focus group 201 in the optical axis direction due to engagement between the rectilinear guide groove and the cam groove.

The focus group 201 includes a first focus lens 211 , an aperture group 401 , a moving barrel 221 and a second focus lens 212 . The second focus lens 212 is housed inside the movable barrel 221 via an adjusting roller 241, which is an adjusting mechanism. Further, the movable roller 231 is fixed to the outer peripheral surface of the movable cylinder 221 with screws in a direction perpendicular to the optical axis. A diaphragm driver 402 is electrically connected to the diaphragm group 401 via a flexible printed circuit board 403 . The flexible printed circuit board 403 functions as a connection member, and a movable bent portion is formed between the inner peripheral surface of the rectilinear guide cylinder 107 and the outer peripheral surface of the movable cylinder 221 , and the diaphragm group 401 is integrated with the focus group 201 . It has a configuration that can be moved freely. The flexible printed circuit board 403 passes through an opening provided in the fixed barrel 106 , passes through the outer peripheral side of the fixed barrel 701 , and is connected to the lens control section 104 .

In this embodiment, as an example of an imaging optical system, a focus group 201 including a first focus lens 211 and a second focus lens 212 and a fixed group 601 including a first fixed lens 611 and a second fixed lens 612 A two-group configuration consisting of The focus group 201 , which has moved to a predetermined optical position according to the defocus of the subject image, forms an image of the light from the subject on the imaging surface of the image sensor 16 via the fixed group 601 . At this time, the diaphragm group 401 is housed in the focus group 201 together with the first focus lens 211 and the second focus lens 212 and moves integrally with the focus group 201 . On the other hand, the anti-vibration group 501 is arranged between the first fixed lens 611 and the second fixed lens 612 and functions as a part of the fixed group 601 .

Furthermore, the imaging optical system of this embodiment has an adjustment mechanism for intentionally shifting the position of the second focus lens 212 for the purpose of maintaining the optical performance of the imaging optical system as a whole. . As a result, in the assembly process, the operator can check the state of the overall optical performance and cancel out adverse effects such as manufacturing errors and assembly variations that occur in each component.

The fixed barrel 106 that holds the focus group 201 and the focus drive unit 301 is fixed to the fixed barrel 701 with screws in the optical axis direction. The fixed barrel 701 further holds the lens control section 104, which is fixed with an optical axis direction screw. A flexible printed circuit board 703 is arranged on the outer peripheral surface of the fixed cylinder 701 . The flexible printed wiring board 703 is mounted with first detection means 704, second detection means 705, and third detection means 706 for detecting image blur such as camera shake caused by the user. The first detection means 704 is an angular velocity sensor (vibration gyro) that detects the pitch direction (direction of rotation about the Z-axis), and is arranged on the XY plane. The second detection means 705 is an acceleration sensor for detecting gravity, vibration, and impact for the purpose of detecting acceleration in three axial directions. be. The third detection means 706 is an angular velocity sensor (vibration gyro) that detects the yaw direction (the direction of rotation about the Y axis) and is arranged on the XZ plane. These detection means detect image shake of the lens barrel 101 and output a shake signal, and the lens control unit 104 drives and controls the anti-vibration group 501 to the target position according to the calculated shift position, and performs exposure. Anti-vibration operation is performed to reduce image blurring during medium or through image display.

The anti-vibration group 501 is inserted into the inner peripheral side of the fixed cylinder 701 from the front side. The anti-vibration group 501 is accommodated on the inner peripheral side of the fixed cylinder 701 via an adjusting roller 702 which is an adjusting mechanism. Details will be described later.

Next, the mechanism of the anti-vibration group 501 of the lens barrel 101, which is a characteristic component of the present invention, will be described in detail with reference to FIGS. 6(a) and 6(b). FIG. 6A is an exploded perspective view showing the mechanism of the anti-vibration group 501. FIG. FIG. 6B is a perspective view showing the flexible printed circuit board 518 that constitutes the anti-vibration group 501. As shown in FIG.

As shown in FIG. 6(a), a vibration isolation group 501 is configured with a fixing member 504 as a base. A lens holding member 505 holds a first correction lens 506 and a second correction lens 507 . Further, the lens holding member 504 is moved on the fixed member 504 by the biasing member 511 via the first guide member 508, the second guide member 509, and the third guide member 510 in a direction substantially orthogonal to the optical axis direction. supported so that it can be moved to A method for supporting the lens holding member 505 will be described later. In this embodiment, the biasing member 511 is configured by a retraction spring, and the lens holding member 505 is biased toward the fixing member 504 side. As will be described later, the urging member 511 can be configured by a flexible printed circuit board instead of a retraction spring, and similarly the lens holding member 505 is urged toward the fixing member 504 side. A cover 512 is fixed to the fixing member 504 so as to sandwich the lens holding member 505 . In this embodiment, it is fixed by fastening with screws, but the fixing method can take various forms.

Two sets of coils 513 are held in the lens holding member 505 with their phases shifted by 90 degrees.

Two pairs of drive magnets 514 are held on the fixed member 504 at positions facing the coils 513 . Further, a pair of yokes 515 corresponding to a pair of drive magnets 514 are held respectively. A pair of yokes 515 are arranged to sandwich the fixing member 504 .

An L-shaped shield case 523 is arranged in the yoke 515 that is enclosed in the fixing member 504 and arranged on the imaging element 16 side. The shield case 523 is a member for blocking or reducing magnetism generated by applying current to the coil 513 . By arranging the shield case 523 , it is possible to reduce adverse effects such as image degradation due to magnetic noise entering other components, mainly the imaging element 16 , due to the magnetism generated by the coil 513 . The shield case 523 is made of copper, aluminum, or the like, which is non-magnetic and has a small electrical resistance. The magnetic field generated by the coil 513 tries to pass through the shield case 523 made of a non-magnetic conductor, but when the magnetic flux density changes, an eddy current is generated by electromagnetic induction. As a result, the magnetic flux passing through the shield case 523 is reduced. In other words, the magnetic flux reaching the imaging element 16 is reduced, and magnetic noise can be reduced.

The coil 513 is electrically connected by being soldered to the flexible printed wiring board 518 .

As described above, the coil 513 exists within the range of the magnetic field created by the drive magnet 514 and yoke 515 . A driving force is generated by applying a current to the coil 513, and the lens holding member 505 holding the coil 513 can be driven with respect to the fixed member 504 in a direction substantially orthogonal to the optical axis. The anti-vibration driving section 502 described above is composed of a coil 513 , a driving magnet 514 and a yoke 515 .

In addition to the drive magnet 514, the fixed member 504 holds two position detection magnets 516 (not shown) for detecting the position of the lens holding member 505 with a phase shift of 90 degrees. Position sensors (not shown) are similarly mounted on a mounting portion 518 a of a flexible printed circuit board 518 with a phase shift of 90 degrees so as to face the position detection magnet 516 , and are held by a lens holding member 505 . A position sensor 517 converts the magnetic flux density of the position detection magnet 516 into an electrical signal. When the lens holding member 505 is driven, the position sensor 517 detects changes in the magnetic flux density of the position detection magnet 516 and outputs an electric signal. As a result, it is possible to detect the drive position of the lens holding member 505 in a plane substantially orthogonal to the optical axis based on this electric signal, and control for shake correction becomes possible.

Next, a method of supporting the lens holding member 505 will be described below.

A first guide member 508 having two V-shaped grooves 519 a is fixed to the lens holding member 505 . In this embodiment, it is fixed by fastening with screws, but the fixing method can take various forms. A second guide member 509 having two similar V-groove shapes 520a is provided at a position facing the V-groove shape 519a. The V-shaped grooves 519a and 520a have a longitudinal shape in the same Y-axis direction, and the rolling member 522a is arranged so as to sandwich the rolling member 522a. Further, the fixed member 504 is provided with a flat portion at a position facing the second guide member 509, and the rolling member 522b is sandwiched between the flat portion of the fixed member 504 and the V-shaped groove 520b of the second guide member 509. placed like this. V-groove shape 520b has a longitudinal shape in the X-axis direction, which is a direction substantially orthogonal to V-groove shapes 519a and 520a. The lens holding member 505 is integrated with the first guide member 508, and can be stably arranged with two rolling members 522a and one rolling member 522b. As a result, the lens holding member 505 can be rolled and driven along the V-grooves 519a and 520a with respect to the second guide member 509 together with the first guide member 508 in the Y-axis direction.

The second guide member 509 is provided with three V-shaped grooves 520c elongated in the X-axis direction, which is a direction substantially orthogonal to the V-shaped grooves 520a, on the side opposite to the lens holding member 505. As shown in FIG. A third guide member 510 having two similar V-groove shapes 521c at positions facing the V-groove shape 520c is provided. The V-shaped grooves 520c and 521c have a longitudinal shape in the same X-axis direction, and the rolling member 522c is arranged so as to sandwich the rolling member 522c. Further, the third guide member 510 is provided with a flat portion at a position facing the V-groove shape 520c provided in the second guide member 509, and the rolling member 522d serves as the flat portion of the third guide member 510. It is arranged so as to be sandwiched by the V-groove shape 520 c of the second guide member 509 . As a result, the lens holding member 505 is integrated with the first guide member 508 via the second guide member 509, and moves in the X-axis direction along the V-shaped grooves 520c and 521c with respect to the third guide member 510. Rolling drive is possible.

With the above combination, the second guide member 509 is driven in the X-axis direction with respect to the third guide member 510, and the lens holding member 505 and the first guide member 508 are integrated with the second guide member 509. In contrast, it drives in the Y-axis direction. That is, the lens holding member 505 can be driven in the X-axis direction and the Y-axis direction while the movement in the rotational direction is restricted with respect to the fixed member 504, and can be driven in a plane substantially perpendicular to the optical axis. .

As shown in FIG. 6(b), the flexible printed wiring board 518 has a stretchable portion 59. As shown in FIG. When image blur of the lens barrel 101 is detected and shake correction is performed, the flexible printed circuit board 518 can be integrated with the lens holding member 505 and driven within a plane substantially perpendicular to the optical axis.

Next, a conventional example of a flexible printed wiring board will be described for comparison.

FIG. 13 is a perspective view showing the flexible printed wiring board 900 and the lens holding member 505 of the anti-vibration group 501 in the conventional example. Note that the fixing member 504 is not illustrated in order to describe the flexible printed wiring board 900 in detail.

As shown in FIG. 13 , the flexible printed circuit board 900 includes a bending portion 910 , a mounting portion 920 , a coil soldering portion 930 (not shown), a substrate connecting portion 940 (not shown), and a fixing member fixing portion 950 .

A position sensor 517 for detecting the driving position of the lens holding member 505 is mounted on the mounting portion 920 . One end of the bending portion 910 is connected to a mounting portion 920 on which the position sensor 517 is mounted, and the other end is a fixing member fixing portion 950 for positioning and fixing to the fixing member 504 (not shown) of the anti-vibration group 501 . have.

The bent portion 910 is bent in a U shape and sandwiched between the lens holding member 505 and the cover 512 . The bent portion 910 is movable so as to follow the anti-vibration driving in a plane substantially perpendicular to the optical axis of the lens holding member 505 . For this reason, the flexible printed circuit board 900 needs to have a wide planar or curved surface area A on both the lens holding member 505 and the cover 512, which causes an increase in size. Also, the length of the bent portion 900 increases according to the amount of movement of the lens holding member 505 . The total length of the flexible printed circuit board 900 increases as the amount of movement of the lens holding member 505 increases.

Next, preferred embodiments of the configuration of the flexible printed circuit board 518 of the anti-vibration group 501 according to the present invention will be described with reference to FIGS. 7a to 12b.

FIG. 7a is a perspective view showing the state before shifting of the flexible printed circuit board 518 and the lens holding member 505 of the anti-vibration group 501 in the first embodiment of the lens barrel and optical equipment according to the present invention. FIG. 7b is a perspective view showing a state in which the flexible printed circuit board 518 and the lens holding member 505 of the anti-vibration group 501 in the first embodiment of the lens barrel and optical equipment according to the present invention are shifted to one side in the X-axis direction. is. FIG. 7c is a perspective view showing a state in which the flexible printed circuit board 518 and the lens holding member 505 of the anti-vibration group 501 in the first embodiment of the lens barrel and optical equipment according to the present invention are shifted to the other in the X-axis direction. is. Note that the fixing member 504 is not illustrated in order to describe the flexible printed wiring board 518 in detail.

FIG. 8a is an exploded view of the flexible printed circuit board 518 of the anti-vibration group 501 in the first embodiment of the lens barrel and optical equipment according to the present invention. FIG. 8b is an enlarged view of the telescopic portion 59 of FIG. 8a in its initial state. FIG. 8c is an enlarged view of the telescoping portion 59 of FIG. 8b in its expanded state.

As shown in FIGS. 7a, 7b, 7c, and 8a, the flexible printed wiring board 518 is composed of an extendable portion 59, a mounting portion 518a, a mounting portion 518b, a coil soldering portion 518c, and a substrate connecting portion 518d. A position sensor 517 for detecting the driving position of the lens holding member 505 is mounted on the mounting portion 518a, and a photointerrupter for detecting the origin position of the focus group 201 is mounted on the mounting portion 518b. One end of the expandable portion 59 is connected to the mounting portion 518a on which the position sensor 517 is mounted, and the other end is connected to the substrate connection portion 518d. Further, in the present embodiment, a through slit 56c provided in an extendable portion 59, which will be described later, is three-dimensionally deformed into a hole shape, which is hooked and fixed to an attachment portion 512a provided in the cover 512. FIG. The mounting portion 512a has a hook shape having a convex portion extending in the optical axis direction, and is attached with the expandable portion 59 stretched. fixed without The through slits 56a and 56b may be hooked on the mounting portion 512a instead of the through slit 56c. When the extensible portion 59 is attached to the attachment portion 512a, a pulling force acts in substantially the same direction as the optical axis due to the contraction of the extensible portion 59 . Thereby, the lens holding member 505 is biased toward the cover 512 side.

When the lens holding member 505 is driven relative to the fixed member 504 in a plane substantially perpendicular to the optical axis, the expansion/contraction portion 59 provided between the mounting portion 512a and the lens holding member 505 expands and contracts.

Next, details of the elastic portion 59 will be described with reference to FIGS. 8a to 8c. Here, in FIGS. 8b and 8c, the horizontal direction is the x-axis and the vertical direction is the y-axis.

The expandable portion 59 has a rectangular shape with a side 53a parallel to the x-axis and a side 53b parallel to the y-axis, and has through slits 56a to 56c arranged in series in a direction parallel to the y-axis. The through slits 56a to 56c preferably have the same length near the center. The through slits 56a to 56c are provided in a direction intersecting with the expansion/contraction direction. In FIG. 8b, three through slits are shown, but for convenience of notation, more through slits may actually be provided.

Further, the expandable portion 59 has a plurality of cut slits 55a and 55b that face each other inward in the y-axis direction from both sides 53a between the through slits 56a to 56c that are adjacent in the x-axis direction. The cut slits 55a and 55b preferably have the same length. The reason why the through slits 56a to 56c and the cut slits 55a and 55b have the same length is to prevent local stress concentration during deformation.

The through slits 56a to 56c and the cut slits 55a and 55b are arranged at regular intervals in the x-axis direction. The width (y-axis direction) of the peripheral edge connecting portions 58a to 58c connected between the through slits 56a to 56c and the side 53a is the same as the width between the through slits 56a to 56c and the cut slits 55a and 55b. length or longer. The peripheral connecting portions 58a to 58c and the through slits 56a to 56c are provided alternately.

In addition, the width (y-axis direction) of the notch connecting portions 57a and 57b connected between the notch slits 55a and 55b facing each other is larger than the width (y-axis direction) of the peripheral edge connecting portions 58a to 58c. getting longer. This is to secure the wiring width of the wiring passing between the through slits 56a to 56c and the cut slits 55a and 55b.

Next, the operation of the expansion/contraction section 59 will be described. As shown in FIG. 8b, the stretchable portion 59 in the initial state is substantially flat like the rest of the flexible printed circuit board 518. As shown in FIG. When both ends 54a and 54b of the expandable portion 59 are pulled apart along the x-axis direction by a relatively weak tensile stress, the cut slits 55a and 55b and the through slits 56a to 56c are flat enough to open slightly. transform inside. Then, when it is further pulled, the cut slits 55a and 55b and the through slits 56a to 56c are slightly twisted and opened while being tilted, and three-dimensionally deformed as shown in FIG. 8c.

As shown in FIG. 7a, in the initial state, the mounting portion 518a of the flexible printed circuit board 518 is fixed to the lens holding member 505, and the hole portion of the through slit 56a provided in the extendable portion 59 is fixed to the mounting portion 512a of the cover 512. Three-dimensionally deformed. Furthermore, as shown in FIG. 7b, when the lens holding member 505 is driven in one direction in the X-axis direction, the end portions 54a and 54b of the expandable portion 59 are further pulled apart, and the cut slits 55a and 55b and the through slits 56a to 56b are separated. 56c further open while undergoing three-dimensional deformation. Further, as shown in FIG. 7c, when the lens holding member 505 is driven in the other direction in the X-axis direction, the ends 54a and 54b of the expandable portion 59 are further pulled apart in the opposite direction, and pass through the cut slits 55a and 55b. The slits 56a to 56c are further opened while being three-dimensionally deformed. Each slit contributes to elongation by deforming into a substantially rhombic shape or a substantially polygonal shape while twisting unevenly. Further, when the lens holding member 505 is driven in a direction different from the X-axis direction, the end portions 54a and 54b of the expandable portion 59 are pulled apart in a direction different from the X-axis direction, and the cut slits 55a and 55b and the through slits 56a to 56b are separated from each other. 56c further open while undergoing three-dimensional deformation. As described above, the extendable portion 59 is the shortest in the initial state of FIG. 7a, and extends in the driving direction when the lens holding member 505 is driven in a plane substantially perpendicular to the optical axis. At this time, a part of the force that pulls the expandable portion 59 in the direction substantially the same as the optical axis becomes a force that pulls it in the direction opposite to the direction in which it is driven in a plane that is substantially perpendicular to the optical axis. small compared to the force. In other words, the expansion/contraction portion 59 always urges the lens holding member 505 toward the cover 512 to follow the anti-vibration drive.

Here, the amount of change in the shape of a sheet called a kirigami structure such as the stretchable portion 59 and the tensile stress will be described. In general, when the sheet is changed from flat to in-plane deformation, the amount of change and the tensile stress maintain a proportional relationship. When the amount of change increases and the in-plane deformation shifts to three-dimensional deformation, the tensile stress decreases once, and as long as the three-dimensional deformation continues, the tensile stress remains almost constant for a while even if the amount of deformation increases.

In the present embodiment, as described above, the flexible printed circuit board 518 is three-dimensionally deformed when incorporated, and is configured to maintain the three-dimensional deformation in the region where the lens holding member 505 can be driven. That is, when the lens holding member 505 moves in a plane substantially perpendicular to the optical axis, the three-dimensional deformation of the expansion/contraction portion 59 continues. There is no need to increase the load significantly.

In this way, the flexible printed circuit board 518 can shorten the overall length of the flexible printed wiring board 518 compared to the conventional one by three-dimensionally deforming the expandable part 59, thereby realizing cost reduction. Further, the planar or curved area A of the lens holding member 505 and the cover 512 required for the movement of the flexible printed circuit board 900 can be reduced, and the effect of space saving can also be obtained.

Further, the width (y-axis direction) of the peripheral edge connecting portions 58a to 58c and the width between the through slits 56a to 56c and the cut slits 55a and 55b are set to the widths of both ends 53a and 53b so that the stretchable portion 59 can be easily three-dimensionally deformed. It's thinner and more prone to breakage. The width of these flexible boards may be increased, but there is a risk that the layout will become larger. Therefore, a reinforcing plate should be attached to at least one of the notch connection parts 57a and 57b and the peripheral edge connection parts 58a to 58c to prevent breakage. Effective when taught. Also, a resin adhesive may be applied to the cut slits 55a and 55b and the slit end portions of the through slits 56a to 56c to prevent cuts. Further, a dummy pattern may be formed in the direction orthogonal to the through slits at the slit end portions of the cut slits 55a and 55b and the through slits 56a to 56c to reinforce them, thereby preventing cuts.

Alternatively, the hole of the through slit 56c may be fixed to the mounting portion 512a of the cover 512 by attaching a reinforcing plate to the peripheral connecting portion 58c.

FIGS. 9a and 9b illustrate the case where the peripheral connecting portion 58c functions as an attachment to the cover 512. FIG.

9a is a perspective view of the peripheral connecting portion 58c and the cover 512. FIG. 9b is a cross-sectional view of peripheral connecting portion 58c and cover 512. FIG. Note that the fixing member 504 is not illustrated in order to describe the flexible printed wiring board 518 in detail.

As shown in Figures 9a and 9b, the cover 512 is provided with a groove 512b into which the peripheral connecting portion 58c is inserted. The groove 512b is formed in a direction different from the expansion/contraction direction of the expandable/contractible portion 59, and is devised so that the peripheral connecting portion 58c does not come off easily from the groove 512b even when the expansion/contraction operation is performed.

Also, an adhesive or the like may be applied to the groove so that the peripheral connecting portion 58c is completely fixed.

Next, the wiring of the flexible printed wiring board 518 will be described.

The wiring of the flexible printed wiring board 518 is roughly composed of two wirings, that is, the detection signal wiring and the driving signal wiring. Although the detailed wiring of the entire flexible printed wiring board 518 is not shown, the two wirings of the detection signal wiring and the driving signal wiring pass from the board connection portion 518d through the expansion/contraction portion 59 and are divided into two at the tip of the mounting portion 518a. . One detection signal wiring is connected to the position sensor 517 of the mounting portion 518a. The other drive signal wiring passes by the position sensor 517 of the mounting portion 518a and is connected to the coil soldering portion 518c.

In general, the detection signal wiring is susceptible to noise from the outside, so it is desirable to reduce the influence of noise by increasing the distance between adjacent wiring, especially the drive signal.

Here, the wiring pattern of the expansion/contraction part 59 in this embodiment will be described.

FIG. 10 is a diagram for explaining the wiring pattern of the conductor layer in the stretchable portion 59. As shown in FIG. As shown in FIG. 10, the drive signal wiring 51 and the detection signal wiring 52 maintain a predetermined inter-wiring distance from the board connection portion 518d to the end portion 54b of the expandable portion 59. As shown in FIG. Then, the drive signal wiring 51 passes through one peripheral edge connecting portion 58c, the detection signal wiring 52 passes through the other peripheral edge connecting portion 58c, and merges at the notch connecting portion 57b. At this time, it is desirable that the drive signal wiring 51 and the detection signal wiring 52 maintain a predetermined distance between the wirings even in the inter-notch connecting portion 57b. In addition, the drive signal wiring 51 and the detection signal wiring 52 of the flexible printed wiring board 518 are closely arranged in parallel. I am trying not to run. The driving signal wiring 51 and the detection signal wiring 52 maintain a predetermined inter-wiring distance until they are separated into two at the tip of the mounting portion 518a. In this way, by separating the detection signal wiring 52 from the drive signal wiring 51, the influence of noise can be reduced.

(Second embodiment)
In the second embodiment, a configuration will be described in which the expansion/contraction portions 59 of the flexible printed circuit board 518 of the anti-vibration group 501 are arranged such that the direction of expansion/contraction of the expansion/contraction portions 59 in the initial state is inclined with respect to the optical axis.

A lens barrel and an optical apparatus according to the present invention will be described below, focusing on differences from the first embodiment.

FIG. 11a is a perspective view showing a state before shifting of the flexible printed wiring board 518 and the lens holding member 505 of the anti-vibration group 501 in the second embodiment of the lens barrel and optical equipment according to the present invention. FIG. 11b is a perspective view showing a state in which the flexible printed wiring board 518 and the lens holding member 505 of the anti-vibration group 501 in the second embodiment of the lens barrel and optical equipment according to the present invention are shifted to one side in the X-axis direction. is. FIG. 11c is a perspective view showing a state in which the flexible printed wiring board 518 and the lens holding member 505 of the anti-vibration group 501 in the second embodiment of the lens barrel and optical equipment according to the present invention are shifted to the other in the X-axis direction. is. Note that the fixing member 504 is not illustrated in order to describe the flexible printed wiring board 518 in detail.

As shown in FIGS. 11a, 11b, and 11c, a fixing member fixing portion 518e is arranged between the expansion/contraction portion 59 of the flexible printed circuit board 518 and the board connection portion 518d. One end of the expandable portion 59 is connected to a mounting portion 518a on which the position sensor 517 is mounted, and the other end has a fixing member fixing portion 518e for positioning and fixing to the fixing member 504. FIG. In this embodiment, the positioning pin provided in the fixing member 504 (not shown) and the fixing member fixing portion 518e of the flexible printed circuit board 518 are positioned and fixed.

Next, the operation of the expansion/contraction section 59 will be described. As shown in FIG. 11a, in the initial state, the mounting portion 518a of the flexible printed circuit board 518 is fixed to the lens holding member 505, and the fixing member fixing portion 518e is fixed to the fixing member 504 (not shown). there is Furthermore, as shown in FIG. 11b, when the lens holding member 505 is driven in one direction in the X-axis direction, the end portions 54a and 54b of the expandable portion 59 are further pulled apart, and the cut slits 55a and 55b and the through slits 56a to 56a are separated. 56c further open while undergoing three-dimensional deformation. Further, as shown in FIG. 11c, when the lens holding member 505 is driven in the other direction in the X-axis direction, the end portions 54a and 54b of the expandable portion 59 approach each other, and the cut slits 55a and 55b and the through slits 56a to 56c are closed. shrinks while deforming three-dimensionally. Each slit contributes to elongation or contraction by being twisted unevenly and deformed into a substantially rhombic shape or a substantially polygonal shape. Further, when the lens holding member 505 is driven in a direction different from the X-axis direction, the end portions 54a and 54b of the expandable portion 59 are pulled apart in a direction different from the X-axis direction, and the cut slits 55a and 55b and the through slits 56a to 56b are separated from each other. 56c further open while undergoing three-dimensional deformation. In this manner, when the lens holding member 505 is driven in a plane substantially perpendicular to the optical axis, the expansion/contraction portion 59 expands or contracts depending on the driving direction. At this time, the elastic part 59 is configured to maintain its three-dimensional deformation even when it contracts most. That is, when the lens holding member 505 moves in a plane substantially perpendicular to the optical axis, the three-dimensional deformation of the expansion/contraction portion 59 continues. There is no need to increase the load significantly.

While the telescopic portion 59 of the first embodiment is extended and fixed in substantially the same direction as the optical axis, the telescopic portion 59 of the second embodiment is the lens holding member 505 and the fixing member fixing portion 518e. Between them, it is tilted obliquely with respect to the direction of the optical axis and is extended and fixed. This is because in the first embodiment, if the anti-vibration group 501 has a small thickness in the optical axis direction, the expansion/contraction portion 59 may not be fully stretched and may not be three-dimensionally deformed. By inclining the expansion/contraction direction of the expansion/contraction part 59 with respect to the optical axis direction, the expansion area of the expansion/contraction part 59 can be secured. Further, even when the expansion/contraction direction of the expansion/contraction portion 59 is tilted with respect to the optical axis direction, the expansion/contraction portion 59 always urges the lens holding member 505 toward the cover 512 to follow the anti-vibration drive.

According to the second embodiment, it is possible to change the configuration of the expandable section 59 according to the configuration of the anti-vibration group 501 .

(Third Embodiment)
In the third embodiment, a configuration in which the biasing member 511 of the anti-vibration group 501 is configured not by the retracting spring but by the expansion/contraction portion 810 of the flexible printed circuit board 800 will be described.

A lens barrel and an optical apparatus according to the present invention will be described below, focusing on differences from the first and second embodiments.

FIG. 12a is an enlarged view showing the biasing member 511 of the vibration isolation group 501 in the conventional example, and FIG. It is an enlarged view.

As shown in FIG. 12a, the biasing member 511 is composed of a retraction spring, and both ends of the biasing member 511 are respectively connected to a third guide member 510 incorporated in the lens holding member 505 and an attachment provided in the fixed member 504. It is attached to the portion 504a. The biasing member 511 exerts a tensile force that biases the lens holding member 505 toward the fixing member 504 due to its own springiness. It is preferable that a plurality of urging members 511 be provided at equal intervals in phase with respect to the anti-vibration group 501 . The biasing member 511 pulls the fixing member 504 of the anti-vibration group 501 and the lens holding member 505 to each other. Therefore, it was necessary to prepare multiple types of retraction springs.

Further, as shown in FIG. 12B, the biasing member 511 is configured by a flexible printed wiring board 800, and the flexible printed wiring board 800 has an expandable portion 810. As shown in FIG. The stretchable portion 810 of the flexible printed circuit board 800 is in a stretched state at the time of incorporation, and is three-dimensionally deformed. A plurality of through slits 820a to 820e are provided in the stretchable portion 810 of the flexible printed circuit board 800, and the through slits 820a to 820e form holes by three-dimensional deformation. The holes of the through slits 820a and 820e are formed by the third guide member 510 incorporated in the lens holding member 505, the third guide member 510 provided in the fixed member 504, and the mounting portion provided in the fixed member 504. 504a. Due to its own springiness, the elastic portion 810 exerts a tensile force that urges the lens holding member 505 toward the fixing member 504 . It is preferable that a plurality of expandable sections 810 be provided at equal phase intervals with respect to the anti-vibration group 501 . The expandable portion 810 pulls the fixing member 504 and the lens holding member 505 of the anti-vibration group 501 to each other. The expansion/contraction part 810 can be biased more strongly by changing the location where it is attached to the attachment part 504a provided on the fixing member 504 from, for example, the through slit 820e to the through slit 820d.

Moreover, the flexible printed wiring board 800 may be configured independently as the biasing member 511 or may be configured integrally with the flexible printed wiring board 518 inside the anti-vibration group 501 . Moreover, when the flexible printed wiring board 800 is configured alone as the biasing member 511, the wiring does not have to pass through. On the other hand, if it is configured integrally with the flexible printed circuit board 518, it may be used for electrical connection through wiring. When the flexible printed wiring board 800 and the flexible printed wiring board 518 are integrally configured, both the electrical connection inside and outside the anti-vibration group 501 and the retraction spring that biases the fixing member 504 and the lens holding member 505 against each other are required. with the characteristics of

According to the third embodiment, it is possible to construct two parts with one part, and at the same time, the urging force of the urging member 511 can be changed easily.

Although preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and changes are possible within the scope of the gist.

1 Camera Body 2 Grip Part 3 Power Operation Part 4 Mode Dial 5 Release Button 6 Accessory Shoe 7 Camera Mount 8 Rear Operation Part 9 Display Part 10 Power Supply Part 11 Operation Part 12 Camera Control Part 13 Storage Part 14 Shutter Unit 15 Shutter Driving Part 16 Imaging element 17 Image processing unit 18 Focus detection unit 19 Pitch shake detection unit 20 Yaw shake detection unit 101 Lens barrel 102 Lens mount 104 Lens control unit 105 Electric contact 106 Fixed barrel 107 Straight guide barrel 108 Cam barrel 109 Elastic member 201 Focus group 211 first focus lens 212 second focus lens (adjustment group)
220 movable barrel unit 221 movable barrel 221a concave portion 221b reinforcing portion 221c rectilinear groove 221d circumferential groove 231 movable roller 241 adjustment roller 251 adjustment group holding frame 251a concave portion 301 focus driving portion 311 focus motor 312 reduction gear 313 cam barrel gear 401 diaphragm group 402 diaphragm Drive unit 403 Flexible printed wiring board 404 Drive signal wiring 405 Detection signal wiring 501 Anti-vibration group 502 Anti-vibration drive unit 503 Adjustment roller 504 Fixing member 504a Mounting portion 505 Lens holding member 506 First correction lens 507 Second correction lens 508 First guide member 509 Second guide member 510 Third guide member 511 Biasing member 512 Cover 512a Mounting portion 512b Groove 513 Coil 514 Drive magnet 515 Yoke 516 Position detection magnet 517 Position sensor 518 Flexible printed circuit board 51 Drive signal Wiring (first wiring)
52 Detection signal wiring (second wiring)
53a Long side 53b Short side 54a, 54b End 55a-c Cut slits 56a-c Penetrating slits 57a-c Connection between cuts 58a-c Peripheral connection 59 Expandable section 518a, b Mounting section 518c Coil soldering section 518d Board Connecting portion 518e Fixed member fixing portion 519a, 520a, 520b, 520c, 521c V-groove shape 522a, 522b, 522c, 522d Rolling member 523 Shield case 601 Fixed group 611 First fixed lens 612 Second fixed lens 701 Fixed cylinder 702 adjustment roller 703 flexible printed wiring board 704 first detection means 705 second detection means 706 third detection means 800 flexible printed wiring board 810 expansion/contraction section 820a to e penetration slit 900 flexible printed wiring board 910 bending section 920 mounting section 930 Coil soldering portion 940 Board connection portion 950 Fixing member fixing portion

Claims (15)

arranged across the fixing member and the holding member,
having a stretchable stretchable part,
The stretchable portion is alternately provided with a plurality of through slits intersecting with the stretch direction and a plurality of peripheral connecting portions connected to the plurality of through slits,
Further, the stretchable portion is provided with a plurality of cut slits cut while facing each other in a direction parallel to the stretch direction, and a plurality of inter-cut connecting portions connected between the cut slits facing each other. be
The connecting member, wherein the expandable portion expands and contracts following the movement of the holding member. The connection member according to claim 1, wherein the holding member holds a lens. 3. The connecting member according to claim 1, wherein the expandable portion expands and contracts following movement of the holding member in a plane perpendicular to the optical axis. The connection member according to any one of claims 1 to 3, wherein a reinforcing plate is attached to at least one of the plurality of peripheral edge connection portions and the plurality of inter-cut connection portions. . A connecting member is provided,
The connection member is arranged across a fixing member and a holding member that holds the lens,
Furthermore, it has an elastic expansion part,
The stretchable portion is alternately provided with a plurality of through slits intersecting with the stretch direction and a plurality of peripheral connecting portions connected to the plurality of through slits,
Further, the stretchable portion is provided with a plurality of cut slits cut while facing each other in a direction parallel to the stretch direction, and a plurality of inter-cut connecting portions connected between the cut slits facing each other. be
The lens barrel according to claim 1, wherein the expansion/contraction portion expands/contracts following movement of the holding member in a plane perpendicular to the optical axis. The holding member is held by the fixed member by the action of a coil provided on the holding member and a magnet provided on the fixed member, and is movable in a plane perpendicular to the optical axis. 6. The lens barrel according to claim 5. 7. The lens barrel according to claim 5, wherein the connecting member is held by being biased so as to attract the holding member and the fixing member to each other. The connection member has a first wiring for driving the holding member and a second wiring for detecting the position of the holding member,
8. The lens barrel according to any one of claims 5 to 7, wherein the first wiring and the second wiring run parallel to each other in the connecting portion between the notches. 9. The connection member is held by the holding member or the fixing member by a mounting portion penetrating through the plurality of through slits at least one location. lens barrel. 10. The lens barrel according to claim 9, wherein the mounting portion has a convex portion extending in a direction along the optical axis and has a hook shape. 11. The lens mirror according to any one of claims 5 to 10, wherein a reinforcing plate is attached to at least one of the plurality of peripheral edge connecting portions and the plurality of inter-notch connecting portions. Cylinder. 12. The lens barrel according to claim 11, wherein the reinforcing plate is engaged with a groove provided in the holding member or the fixing member, and the groove extends along a direction different from the extension/contraction direction. 13. The lens barrel according to any one of claims 5 to 12, wherein an adhesive is applied to an end of said through slit. 14. The lens barrel according to any one of claims 5 to 13, wherein the connection member is a flexible printed circuit board. An optical instrument comprising the lens barrel according to any one of claims 5 to 14.

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