Lens barrels and optical devices

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]

[0001] The present invention provides Lens barrels and optical devices It is related to. [Background technology]

[0002] In recent years, lens barrels and optical devices such as digital still cameras, video cameras, and interchangeable lenses, which have been required to be more compact, are equipped with multiple drive mechanisms, such as vibration isolation mechanisms, focus mechanisms, and aperture mechanisms. Signals related to these drive mechanisms are connected to a main board, on which circuit components such as ICs are mounted, via multiple flexible printed circuit boards (FPCBs), via connectors or soldering. The FPCBs used for the multiple drive mechanisms must follow the movement of the drive mechanisms along the optical axis and in the in-plane direction perpendicular to the optical axis. Therefore, the FPCBs must be provided with sufficient length and space for movement. Furthermore, depending on the diameter and thickness of the lens barrel and optical device, as well as the location of the optical adjustment mechanism and each drive mechanism, the length and range of movement of the FPCB must be wide. As a result, FPCBs in lens barrels tend to be large due to the long moving parts and flat or curved areas of the FPCB. Furthermore, a long FPCB results in poor yield during board manufacturing, increasing costs.

[0003] Patent Document 1 discloses the configuration of a stretchable flexible printed circuit board having diamond-shaped holes with different aspect ratios. The diamond-shaped holes are formed in a lattice pattern, with the diagonal lines in the non-extension direction longer than the diagonal line in the extension direction. This configuration eliminates the need to provide stretchable sections that are bent in a zigzag shape or other shape in the thickness direction of the board, enabling stretching while reducing the mounting thickness in electronic devices. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-259929 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the configuration disclosed in Patent Document 1 can only accommodate minute expansion and contraction such as axial rotation in the opening and closing mechanism, making it difficult to ensure a wide range of movement, such as the amount of movement of the moving group in the optical axis direction or in the in-plane direction perpendicular to the optical axis, used in the drive mechanism inside the lens barrel.

[0006] In view of the above, the present invention provides a connecting member that can accommodate the movement of a lens while shortening the overall length of the flexible cable by three-dimensional deformation of the expansion and contraction section.Furthermore, it is an object of the present invention to provide an optical device that can be miniaturized by increasing the space efficiency for arranging a flexible printed circuit board in a drive mechanism within the optical device. [Means for solving the problem]

[0008] The lens barrel according to the present invention is provided with a connecting member, the connecting member being arranged across a fixed member and a holding member that holds a lens, and further having an expandable and contractible section, the expandable section being provided with a plurality of through slits that intersect with the expansion and contraction direction and a plurality of peripheral connecting sections that are connected to the plurality of through slits, and the expandable section being provided with a plurality of cut slits that are cut in while facing each other in a direction parallel to the expansion and contraction direction, and a plurality of inter-cut connecting sections that connect between the cut slits that face each other, the connecting member is biased and held so as to attract the holding member and the fixing member to each other, The expandable portion expands and contracts in accordance with the movement of the holding member in a plane perpendicular to the optical axis. In addition, a connecting member is provided, and the connecting member is arranged across the fixed member and the holding member that holds the lens, and further has an expandable and contractible section, and the expandable section is provided with a plurality of through slits that intersect with the expansion and contraction direction and a plurality of peripheral connecting sections connected to the plurality of through slits, which are alternately provided, and further the expandable section is provided with a plurality of cut slits that are cut facing each other in a direction parallel to the expansion and contraction direction, and a plurality of inter-cut connecting sections that are connected between the cut slits that face each other, and an attachment section penetrates the plurality of through slits at at least one point, so that the connecting member is held by the holding member or the fixed member, and the expandable section expands and contracts in accordance with the movement of the holding member in a plane perpendicular to the optical axis. Further, a connecting member is provided, the connecting member being arranged across the fixed member and the holding member that holds the lens, and further having an expandable and contractible stretchable section, the expandable section being provided with a plurality of through slits that intersect with the expansion and contraction direction and a plurality of peripheral connecting sections that are connected to the plurality of through slits, and the expandable section being provided with a plurality of cut slits that are cut facing each other in a direction parallel to the expansion and contraction direction, and a plurality of inter-cut connecting sections that are connected between the cut slits that face each other, the expandable section being expandable and contractable in accordance with the movement of the holding member in a plane perpendicular to the optical axis, and adhesive being applied to the ends of the through slits. [Effects of the Invention]

[0009] According to the present invention, a connecting member can be provided that can reduce the space required for the flexible printed circuit board layout within an optical device and reduce costs by improving material yield by shortening the overall length of the flexible printed circuit board. [Brief explanation of the drawings]

[0010] [Figure 1] 1A and 1B are front and rear perspective views of a lens barrel and a digital camera according to an embodiment of the present invention. [Figure 2] 1 is a block diagram showing the configuration of a lens barrel and a digital camera according to an embodiment of the present invention. [Figure 3] FIG. 2 is a cross-sectional view of the lens barrel in a retracted state according to the embodiment of the present invention. [Figure 4] FIG. 2 is a cross-sectional view of the lens barrel in the extended state according to the embodiment of the present invention. [Figure 5] FIG. 2 is an exploded perspective view showing the mechanism of internal components in the lens barrel according to the embodiment of the present invention. [Figure 6] FIG. 2 is an exploded perspective view showing the mechanism of the vibration isolation group of the lens barrel according to the embodiment of the present invention. [Figure 7a] FIG. 2 is a perspective view showing a state before a flexible printed wiring board and a lens holding member of the vibration isolation group are shifted in the first embodiment of the present invention. [Figure 7b] 1 is a perspective view showing a state in which the flexible printed wiring board and the lens holding member of the vibration isolation group have been shifted in one direction in the X-axis direction in the first embodiment of the present invention. FIG. [Figure 7c] 10 is a perspective view showing a state in which the flexible printed wiring board and the lens holding member of the vibration isolation group have been shifted to the other side in the X-axis direction in the first embodiment of the present invention. FIG. [Figure 8a] FIG. 1 is a development view of a flexible printed wiring board according to a first embodiment of the present invention. [Figure 8b] 3 is an enlarged view of an initial state of an expansion / contraction portion of the flexible printed wiring board according to the first embodiment of the present invention. FIG. [Figure 8c]3 is an enlarged view of the stretchable portion of the flexible printed wiring board in the first embodiment of the present invention in a stretched state. FIG. [Figure 9a] FIG. 2 is an enlarged perspective view of a peripheral connector and a cover according to an embodiment of the present invention. [Figure 9b] 4 is a cross-sectional view of a peripheral connection portion and a cover according to an embodiment of the present invention. FIG. [Figure 10] 2 is a diagram showing a wiring pattern of a conductor layer of a flexible printed wiring board according to an embodiment of the present invention. FIG. [Figure 11a] FIG. 10 is a perspective view showing a state before a flexible printed wiring board and a lens holding member of an image stabilization group are shifted in a second embodiment of the present invention. [Figure 11b] FIG. 10 is a perspective view showing a state in which the flexible printed wiring board and the lens holding member of the vibration isolation group have been shifted in one direction in the X-axis direction in the second embodiment of the present invention. [Figure 11c] FIG. 10 is a perspective view showing a state in which the flexible printed wiring board and the lens holding member of the vibration isolation group have been shifted to the other side in the X-axis direction in the second embodiment of the present invention. [Figure 12a] FIG. 4 is an enlarged view showing the attachment state of the biasing member of the vibration isolation group in the embodiment of the present invention. [Figure 12b] FIG. 10 is an enlarged view showing the attached state of a flexible printed wiring board, which is a biasing member of a vibration isolation group in a third embodiment of the present invention. [Figure 13] FIG. 10 is a perspective view of a flexible printed wiring board and a lens holding member of a conventional vibration isolation group. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The same reference numerals indicate the same or corresponding parts throughout the drawings. Note that, in this embodiment, an interchangeable lens will be described as an example of an optical device, but various modifications and changes can be made to other optical devices, such as an integrated lens camera, within the scope of the present invention.

[0012] (First embodiment) FIG. 1 shows the appearance of a lens barrel 101 according to an embodiment of the present invention and a digital camera (hereinafter referred to as a camera body) 1 to which the lens barrel 101 is detachably attached. FIGS. 1(a) and 1(b) are perspective views showing the front and rear sides, respectively. As shown in FIG. 1(a), the optical axis direction along which the optical axis of the imaging optical system housed in the lens barrel 101 extends is defined as the X-axis direction, and the directions perpendicular to this are defined as the Z-axis direction (horizontal direction) and the Y-axis direction (vertical direction). Hereinafter, the Z-axis direction and the Y-axis direction will be collectively referred to as the Z / Y-axis direction. Furthermore, the direction of rotation around the Z-axis will be defined as the pitch direction, and the direction of rotation around the Y-axis will be defined as the yaw direction. The pitch direction and yaw direction (hereinafter collectively referred to as the pitch / yaw direction) are directions of rotation around two axes, the Z-axis and the Y-axis, which are perpendicular to each other.

[0013] A grip section 2 is provided on the left side of the camera body 1 when viewed from the front (the subject side) (the right side when viewed from the back) to allow the user to hold the camera body 1 with their hand. A power operation section 3 is also located on the top surface of the camera body 1. When the user turns on the power operation section 3 while the camera body 1 is in the power-off state, the camera body 1 is turned on and becomes capable of capturing images. When the user turns off the power operation section 3 while the camera body 1 is in the power-on state, the camera body 1 is turned off.

[0014] Furthermore, the top surface of the camera body 1 is provided with a mode dial 4, a release button 5, and an accessory shoe 6. The user can switch between imaging modes by rotating the mode dial 4. The imaging modes include a manual still image capture mode, in which the user can freely set imaging conditions such as shutter speed and aperture value; an auto still image capture mode, in which the appropriate exposure is automatically obtained; and a video capture mode for capturing videos. The user can also half-press the release button 5 to initiate imaging preparation operations such as autofocus and autoexposure control, or fully press the button to initiate imaging. Accessories such as an external flash can be detachably attached to the accessory shoe 6. The camera body 1 also includes an imaging element that photoelectrically converts (captures) the subject image formed by the imaging optical system within the lens barrel 101.

[0015] Lens barrel 101 is mechanically and electrically connected to camera mount 7 provided on camera body 1 via lens mount 102. As described above, lens barrel 101 houses an imaging optical system that focuses light from a subject to form a subject image.

[0016] As shown in FIG. 1(b), the rear surface of the camera body 1 is provided with a rear operation unit 8 and a display unit 9. The rear operation unit 8 includes a plurality of buttons and dials to which various functions are assigned. When the camera 1 is powered on and the still image or video shooting mode is set, the display unit 9 displays a through image of the subject image captured by the image sensor. The display unit 9 also displays imaging parameters indicating imaging conditions such as shutter speed and aperture value, and the user can change the settings of the imaging parameters by operating the rear operation unit 8 while viewing the display. The rear operation unit 8 includes a playback button for instructing playback of a recorded captured image, and when the user operates the playback button, the captured image is played back and displayed on the display unit 9.

[0017] 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 includes a power supply unit 10 that supplies power to the camera body 1 and lens barrel 101, and an operation unit 11 that includes the power operation unit 3, mode dial 4, release button 5, rear operation unit 8, and the touch panel function of the display unit 9. The camera body 1 and lens barrel 101 as a whole system are controlled by a camera control unit 12 provided in the camera body 1 and a lens control unit 104 provided in the lens barrel 101, which communicate with each other. The camera control unit 12 reads and executes computer programs stored in the memory unit 13. In this process, the camera control unit 12 communicates various control signals, data, and the like with the lens control unit 104 via a communication terminal of an electrical contact 105 provided in the lens mount 102. The electrical contact 105 includes a power terminal that supplies power from the power supply unit 10 to the lens barrel 101.

[0018] The imaging optical system of lens barrel 101 has a focus group 201 including a focus lens that moves in the optical axis direction to adjust the focus, an aperture group 401 that adjusts the amount of light, and an image stabilization group 501 including a shift lens as an image stabilization element that reduces image blur. Image stabilization group 501 performs an image stabilization operation to reduce image blur by moving (shifting) the shift lens in the Z / Y axis directions perpendicular to the optical axis. Furthermore, lens barrel 101 has a focus driver 301 that drives focus group 201, an aperture driver 402 that drives aperture group 401, and an image stabilization driver 502 that drives image stabilization group 501.

[0019] Camera body 1 has shutter unit 14, shutter driver 15, image sensor 16, image processor 17, and the aforementioned camera controller 12. Shutter unit 14 controls the amount of light collected by the imaging optical system within lens barrel 101 and exposed to image sensor 16. Image sensor 16 photoelectrically converts the subject image formed by the imaging optical system and outputs an image signal. Image processor 17 performs various image processes on the image signal and then generates an image signal. Display 9 displays the image signal (through image) output from image processor 17, displays imaging parameters as described above, and plays back and displays captured images recorded in memory 13 or a recording medium (not shown).

[0020] The camera control unit 12 controls the driving of the focus group 201 in response to an image capture preparation operation (half-pressing the release button 5) on the operation unit 11. For example, when an autofocus operation is instructed, the focus detection unit 18 determines the focus state of the subject image formed by the image sensor 16 based on the image signal generated by the image processing unit 17, generates a focus signal, and sends it to the camera control unit 12. At the same time, the focus drive unit 301 detects the current position of the focus group 201 and sends that signal to the camera control unit 12 via the lens control unit 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 amount of deviation, and sends it to the lens control unit 104. The lens control unit 104 then controls the driving of the focus group 201 to a target position via the focus drive unit 301, correcting the focus deviation of the subject image.

[0021] As will be described in detail later, the focus drive unit 301 includes a cam barrel, a focus motor 311, a reduction gear connecting the cam barrel and the focus motor 311, and a photointerrupter that detects the origin position of the focus group 201. A stepping motor, a type of actuator, is typically used as the focus motor 311. However, because a stepping motor can only control the relative drive amount, the current position of the focus group 201 is undefined when the power is off. Therefore, when a user turns on the power control unit 3, control is required to move the focus group 201 to the origin position and execute origin detection processing. Since this control of origin detection processing is a well-known technology adopted in many optical devices, a description thereof will be omitted here. Note that a DC motor or ultrasonic motor equipped with an encoder may also be used as the actuator. Furthermore, while a photointerrupter directly receives light emitted from a light-emitting unit with a light-receiving unit, a photoreflector that receives reflected light from a reflective surface or a brush that contacts a conductive pattern may alternatively be used.

[0022] Furthermore, camera control unit 12 controls the driving of aperture group 401 and shutter unit 14 via aperture drive unit 402 and shutter drive unit 15 in accordance with the aperture value and shutter speed settings received from operation unit 11. For example, when an automatic exposure control operation is instructed, camera control unit 12 receives a luminance signal generated by image processing unit 17 and performs a photometric calculation. Based on the result of this photometric calculation, camera control unit 12 controls the driving of aperture group 401 in accordance with an image capture instruction operation on operation unit 11 (full depression of release button 5). At the same time, camera control unit 12 controls the driving of shutter unit 14 via shutter drive unit 15 and performs exposure processing by image sensor 16.

[0023] The camera body 1 has a pitch shake detection unit 19 and a yaw shake detection unit 20 as shake detection means capable of detecting image shake caused by a user's hand shake or the like. The pitch shake detection unit 19 and the yaw shake detection unit 20 each use an angular velocity sensor (vibration gyro) and an angular acceleration sensor to detect image shake in the pitch direction (rotation direction around the Z axis) and the yaw direction (rotation direction around the Y axis) and output a shake signal. The camera control unit 12 calculates the shift position of the vibration isolation group 501 (shift lens) in the Y axis direction using the shake signal from the pitch shake detection unit 19. Similarly, the camera control unit 12 calculates the shift position of the vibration isolation group 501 in the Z axis direction using the shake signal from the yaw shake detection unit 20. Then, the camera control unit 12 controls the drive of the vibration isolation group 501 to a target position according to the calculated shift positions in the pitch and yaw directions, and performs vibration isolation operation to reduce image shake during exposure and live view image display.

[0024] Next, the positional relationship between the components in the lens barrel 101 and camera body 1 in this embodiment will be described using Figures 3, 4, and 5. Figures 3 and 4 are cross-sectional views on an XY plane including the optical axis, showing the retracted and extended states of the focus group 201. The center line shown here roughly coincides with the optical axis determined by the imaging optical system, and therefore will be referred to hereinafter as the optical axis. Figure 5 is an exploded perspective view showing the mechanism of the internal components in the lens barrel 101, showing the retracted state of the focus group 201.

[0025] Fixed barrel 106 is a fixed member that holds first fixed lens 611 on its inner circumferential side and holds rectilinear guide barrel 107 on its front surface. Linear guide barrel 107 is a fixed member that houses focus group 201 on its inner circumferential side and rotatably holds cam barrel 108 on its outer circumferential side. Cam barrel 108 is biased in the optical axis direction by elastic member 109, and the surface on the back side (camera body 1 side) is in close contact with fixed barrel 106 so as to be slidable thereon.

[0026] 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, a reduction gear (not shown) is made up of multiple gears, each of which is rotatably held on the rear surface of the fixed barrel 106. Furthermore, a cam barrel gear (not shown) is fixed to the outer circumferential surface of the cam barrel 108 so as to be coupled to the reduction gear. When the focus motor 311 is rotationally driven, the driving force is reduced in speed via the reduction gear and the cam barrel gear and transmitted to the cam barrel 108. In this way, the cam barrel 108 rotates about the optical axis while its movement in the optical axis direction is restricted.

[0027] The focus group 201 is inserted into the inner periphery of the linear guide barrel 107 from the front side and assembled therein. A linear guide groove is formed in the linear guide barrel 107 to restrict movement of the focus group 201 in the rotational direction and guide linear movement in the optical axis direction. In addition, a cam groove having a linear locus in the rotational direction is formed in the cam barrel 108, corresponding to the stroke of the focus group 201. Three movable rollers 231 are fixed to the focus group 201 at equal intervals of 120 degrees and engage with the linear guide groove and the cam groove. When the cam barrel 108 rotates, the movable rollers 231 move the focus group 201 forward and backward in the optical axis direction due to engagement between the linear guide groove and the cam groove.

[0028] The focus group 201 includes a first focus lens 211, an aperture group 401, a movable barrel 221, and a second focus lens 212. The second focus lens 212 is housed on the inner periphery of the movable barrel 221 via an adjustment roller 241, which serves as an adjustment mechanism. The movable roller 231 is fixed to the outer periphery of the movable barrel 221 with a screw in a direction perpendicular to the optical axis. An aperture drive unit 402 is electrically connected to the aperture group 401 via a flexible printed wiring board 403. The flexible printed wiring board 403 functions as a connecting member and has a movable bending portion formed between the inner periphery of the linear guide barrel 107 and the outer periphery of the movable barrel 221, allowing the aperture group 401 to move integrally with the focus group 201. The flexible printed wiring board 403 passes through an opening provided in the fixed barrel 106, passes around the outer periphery of the fixed barrel 701, and is connected to the lens control unit 104.

[0029] This embodiment employs, as an example of an imaging optical system, a two-group configuration consisting of 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. The focus group 201 moves to a predetermined optical position in response to defocusing of the subject image, and causes light from the subject to form an image on the imaging surface of the image sensor 16 via the fixed group 601. At this time, the aperture 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. Meanwhile, the vibration isolation group 501 is disposed between the first fixed lens 611 and the second fixed lens 612, and functions as part of the fixed group 601.

[0030] Furthermore, in order to maintain the optical performance of the entire imaging optical system, the imaging optical system of this embodiment has an adjustment mechanism that intentionally shifts the position of the second focus lens 212. This allows workers in the assembly process to cancel out adverse effects such as manufacturing errors and assembly variations that occur in each component while checking the overall optical performance state.

[0031] The fixed barrel 106, which holds the focus group 201 and the focus driver 301, is fixed to the fixed barrel 701 with screws in the optical axis direction. The fixed barrel 701 further holds the lens controller 104, which is fixed with screws in the optical axis direction. A flexible printed wiring board 703 is disposed on the outer circumferential surface of the fixed barrel 701. The flexible printed wiring board 703 is equipped with a first detector 704, a second detector 705, and a third detector 706 for detecting image blur caused by the user's hand shake, as described above. The first detector 704 is an angular velocity sensor (vibration gyroscope) that detects the pitch direction (direction of rotation around the Z axis) and is disposed on the XY plane. The second detector 705 is an acceleration sensor that detects acceleration in three axial directions and detects gravity, vibration, and impact. In this embodiment, like the first detector 704, it is disposed on the XY plane. The third detector 706 is an angular velocity sensor (vibration gyroscope) that detects the yaw direction (direction of rotation around the Y axis) and is disposed on the XZ plane. These detection means detect image shake in the lens barrel 101 and output a shake signal, and the lens control unit 104 controls the drive of the vibration isolation group 501 to the target position according to the calculated shift position, performing vibration isolation operation to reduce image shake during exposure and through-image display.

[0032] The vibration-damping group 501 is inserted from the front side into the inner periphery of the fixed barrel 701. The vibration-damping group 501 is housed on the inner periphery of the fixed barrel 701 via an adjustment roller 702, which is an adjustment mechanism. Details will be described later.

[0033] Next, the mechanism of the vibration isolation group 501 of the lens barrel 101, which is a characteristic component constituting the present invention, will be described in detail using Figures 6(a) and 6(b). Figure 6(a) is an exploded perspective view showing the mechanism of the vibration isolation group 501. Figure 6(b) is a perspective view showing a flexible printed wiring board 518 configured in the vibration isolation group 501.

[0034] As shown in FIG. 6( a), an image stabilization group 501 is configured with a fixed member 504 as a base. A lens holding member 505 holds a first correction lens 506 and a second correction lens 507. Furthermore, the lens holding member 504 is supported on the fixed member 504 by a biasing member 511 via a first guide member 508, a second guide member 509, and a third guide member 510 so as to be movable in a direction substantially perpendicular to the optical axis direction. A method for supporting the lens holding member 505 will be described later. In this embodiment, the biasing member 511 is configured as a retraction spring, and the lens holding member 505 is biased toward the fixed member 504. Note that, as will be described later, the biasing member 511 can also be configured as a flexible printed circuit board instead of a retraction spring, and the lens holding member 505 is similarly biased toward the fixed member 504. A cover 512 is fixed to the fixed member 504 so as to sandwich the lens holding member 505. In this embodiment, the fixing is performed by fastening with screws, but the fixing method can take various forms.

[0035] The lens holding member 505 holds two sets of coils 513, each of which is shifted in phase by 90 degrees from the other.

[0036] Two pairs of drive magnets 514 are held on fixed member 504 at positions facing coils 513. Furthermore, a pair of yokes 515 corresponding to each pair of drive magnets 514 is held on fixed member 504. The pair of yokes 515 are arranged so as to sandwich fixed member 504 therebetween.

[0037] An L-shaped shield case 523 is disposed on the yoke 515, which is enclosed within the fixing member 504 and located on the imaging element 16 side. The shield case 523 is a component for blocking or reducing the magnetic field generated by passing a current through the coil 513. By disposing the shield case 523, it is possible to reduce adverse effects such as image degradation caused by magnetic noise entering other components, primarily the imaging element 16, due to the magnetic field generated from the coil 513. The shield case 523 is made of a nonmagnetic material with low electrical resistance, such as copper or aluminum. The magnetic field generated by the coil 513 attempts to pass through the shield case 523, which is made of a nonmagnetic conductor. However, changes in magnetic flux density generate eddy currents due to 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, making it possible to reduce magnetic noise.

[0038] The coil 513 is electrically connected to a flexible printed wiring board 518 by being soldered thereto.

[0039] As described above, coil 513 is present within the range of the magnetic field created by drive magnet 514 and yoke 515. A drive force is generated by passing a current through coil 513, and lens holding member 505, which holds coil 513, can be driven in a direction approximately perpendicular to the optical axis relative to fixed member 504. The vibration isolation drive unit 502 described above is made up of coil 513, drive magnet 514, and yoke 515.

[0040] 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, the position detection magnets 516 being shifted in phase by 90 degrees. Position sensors (not shown) are mounted on mounting portions 518a of a flexible printed wiring board 518 so as to face the position detection magnets 516, similarly shifted in phase by 90 degrees, and are held by the lens holding member 505. The position sensor 517 converts the magnetic flux density of the position detection magnets 516 into an electric signal. When the lens holding member 505 is driven, the position sensor 517 detects a change in the magnetic flux density of the position detection magnets 516 and outputs an electric signal. This makes it possible to detect the drive position of the lens holding member 505 in a plane substantially perpendicular to the optical axis based on the electric signal, enabling control for image shake correction.

[0041] Next, a method for supporting the lens holding member 505 will be described below.

[0042] A first guide member 508 having two V-groove shapes 519a is fixed to the lens holding member 505. In this embodiment, the first guide member 508 is fixed by fastening with screws, but various fixing methods are possible. A second guide member 509 having two similar V-groove shapes 520a at positions opposite the V-groove shapes 519a is provided. The V-groove shapes 519a and 520a are elongated in the same direction, the Y-axis direction, and rolling member 522a is arranged to sandwich the rolling member 522a. Furthermore, a flat portion is provided on the fixed member 504 at a position opposite the second guide member 509, and rolling member 522b is arranged to be sandwiched between the flat portion of the fixed member 504 and the V-groove shape 520b of the second guide member 509. The V-groove shape 520b is elongated in the X-axis direction, which is a direction approximately perpendicular to the V-groove shapes 519a and 520a. Lens holding member 505 is integrated with first guide member 508 and can be stably positioned with a total of three rolling members: two rolling members 522a and one rolling member 522b. This allows lens holding member 505 to be driven to roll in the Y-axis direction along V-groove shapes 519a and 520a relative to second guide member 509, integrated with first guide member 508.

[0043] The second guide member 509 is provided with three V-groove shapes 520c, each elongated in the X-axis direction, which is a direction substantially perpendicular to the V-groove shapes 520a, on the side opposite the lens holding member 505. The third guide member 510 is provided with two similar V-groove shapes 521c, each positioned opposite the V-groove shapes 520c. The V-groove shapes 520c and 521c are elongated in the same direction, the X-axis direction, and rolling members 522c are arranged to sandwich the rolling members 522c. Furthermore, the third guide member 510 is provided with a flat portion at a position opposite the V-groove shapes 520c of the second guide member 509, and the rolling members 522d are arranged to sandwich the rolling members 522d between the flat portion of the third guide member 510 and the V-groove shapes 520c of the second guide member 509. This allows lens holding member 505 to be driven to roll integrally with first guide member 508 via second guide member 509 relative to third guide member 510 in the X-axis direction along V-groove shapes 520c and 521c.

[0044] With the above combination, the second guide member 509 is driven in the X-axis direction relative to the third guide member 510, and the lens holding member 505 is driven integrally with the first guide member 508 in the Y-axis direction relative to the second guide member 509. In other words, the lens holding member 505 can be driven in the X-axis and Y-axis directions while its rotational movement is restricted relative to the fixed member 504, and it can be driven within a plane approximately perpendicular to the optical axis.

[0045] 6(b), flexible printed wiring board 518 has an expandable portion 59. When image blur of lens barrel 101 is detected and blur correction is performed, flexible printed wiring board 518 becomes one with lens holding member 505 and can be driven within a plane approximately perpendicular to the optical axis.

[0046] Next, a conventional example of a flexible printed wiring board will be described for comparison.

[0047] 13 is a perspective view showing flexible printed wiring board 900 and lens holding member 505 of vibration isolation group 501 in the conventional example. In order to provide a detailed explanation of flexible printed wiring board 900, fixing member 504 is not shown.

[0048] As shown in FIG. 13, a flexible printed wiring board 900 is made up of a bending portion 910, a mounting portion 920, a coil soldering portion 930 (not shown), a board connecting portion 940 (not shown), and a fixing member fixing portion 950.

[0049] Mounted on the mounting portion 920 is a position sensor 517 that detects the drive position of the lens holding member 505. One end of the bent portion 910 is connected to the mounting portion 920 on which the position sensor 517 is mounted, and the other end has a fixing member fixing portion 950 for being positioned and fixed to a fixing member 504 (not shown) of the vibration isolation group 501.

[0050] The bending portion 910 is bent into a U-shape and is sandwiched between the lens holding member 505 and the cover 512. The bending portion 910 is movable to follow vibration isolation driving within a plane that is approximately perpendicular to the optical axis of the lens holding member 505. For this reason, the flexible printed wiring board 900 needs to have a large flat or curved area A on both the lens holding member 505 and the cover 512, which causes the flexible printed wiring board 900 to become larger. Furthermore, the length of the bending portion 900 increases according to the amount of movement of the lens holding member 505. The overall length of the flexible printed wiring board 900 increases as the amount of movement of the lens holding member 505 increases.

[0051] Next, a preferred embodiment of the configuration of flexible printed wiring board 518 of vibration isolation group 501 in the present invention will be described with reference to FIGS. 7a to 12b.

[0052] Fig. 7a is a perspective view showing a state before flexible printed wiring board 518 and lens holding member 505 of vibration isolation group 501 in the first embodiment of the lens barrel and optical apparatus according to the present invention are shifted. Fig. 7b is a perspective view showing a state after flexible printed wiring board 518 and lens holding member 505 of vibration isolation group 501 in the first embodiment of the lens barrel and optical apparatus according to the present invention have been shifted in one direction in the X-axis direction. Fig. 7c is a perspective view showing a state after flexible printed wiring board 518 and lens holding member 505 of vibration isolation group 501 in the first embodiment of the lens barrel and optical apparatus according to the present invention have been shifted in the other direction in the X-axis direction. Note that fixing member 504 is not shown in order to provide a detailed description of flexible printed wiring board 518.

[0053] Figure 8a is a development view of flexible printed wiring board 518 of vibration isolation group 501 in the first embodiment of the lens barrel and optical apparatus according to the present invention. Figure 8b is an enlarged view of the initial state of expansion / contraction section 59 in Figure 8a. Figure 8c is an enlarged view of the expanded state of expansion / contraction section 59 in Figure 8b.

[0054] As shown in FIGS. 7a, 7b, 7c, and 8a, flexible printed wiring board 518 is composed of expansion / contraction section 59, mounting section 518a, mounting section 518b, coil soldering section 518c, and substrate connection section 518d. Mounting section 518a is equipped with position sensor 517 for detecting the drive position of lens holding member 505, and mounting section 518b is equipped with a photointerrupter for detecting the origin position of focus group 201. One end of expansion / contraction section 59 is connected to mounting section 518a on which position sensor 517 is mounted, and the other end is connected to substrate connection section 518d. In this embodiment, through slit 56c provided in expansion / contraction section 59 (described later) is three-dimensionally deformed into a hole shape and is hooked onto and fixed to mounting section 512a provided on cover 512. The mounting portion 512a has a hook shape with a convex portion extending in the optical axis direction, and is mounted with the expandable portion 59 in an expanded state. When the expandable portion 59 contracts, it catches on the hook, thereby fixing the lens holder 505 without coming off the cover 512. Note that the portion that catches on the mounting portion 512a may be the through slits 56a and 56b instead of the through slit 56c. When the expandable portion 59 is mounted to the mounting portion 512a, the contraction of the expandable portion 59 acts to pull the lens holder 505 in substantially the same direction as the optical axis. This biases the lens holder 505 toward the cover 512.

[0055] 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 attachment portion 512a and the lens holding member 505 expands and contracts.

[0056] Next, details of the expandable portion 59 will be described with reference to Figures 8a to 8c. Here, in Figures 8b and 8c, the horizontal direction is the x-axis, and the vertical direction is the y-axis.

[0057] The stretchable 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-56c arranged in series in a direction parallel to the y-axis. The through slits 56a-56c are preferably the same length and located near the center. The through slits 56a-56c are arranged in a direction intersecting the stretchable direction. While three through slits are shown in Figure 8b, this is merely for convenience of illustration, and more through slits may actually be provided.

[0058] Furthermore, stretchable section 59 has multiple cut slits 55a, 55b that are cut inward from both sides 53a in the y-axis direction between through slits 56a-56c adjacent to each other in the x-axis direction. Cut slits 55a, 55b are preferably the same length. This is because the through slits 56a-56c and cut slits 55a, 55b are all the same length to prevent localized stress concentration during deformation.

[0059] In the x-axis direction, the through slits 56a-56c and the cut slits 55a, 55b are aligned at equal intervals. The width (y-axis direction) of the peripheral connecting portions 58a-58c connecting the through slits 56a-56c and the side 53a is the same as or longer than the width between the through slits 56a-56c and the cut slits 55a, 55b. The peripheral connecting portions 58a-58c and the through slits 56a-56c are arranged alternately.

[0060] Furthermore, the width (y-axis direction) of inter-slit connecting portions 57a, 57b connecting the mutually facing cut slits 55a, 55b is greater than the width (y-axis direction) of peripheral connecting portions 58a-58c in order to ensure the wiring width of the wiring passing between the through slits 56a-56c and the cut slits 55a, 55b.

[0061] Next, the operation of the stretchable portion 59 will be described. As shown in Figure 8b, the stretchable portion 59 in its initial state is substantially flat, like the other portions of the flexible printed wiring board 518. When both ends 54a and 54b of the stretchable portion 59 are pulled with a relatively weak tensile stress so as to be pulled apart along the x-axis direction, the stretchable portion 59 is deformed in-plane to such an extent that the cut slits 55a and 55b and the through slits 56a to 56c open slightly. When the stretchable portion 59 is further pulled, the cut slits 55a and 55b and the through slits 56a to 56c open while being slightly twisted and tilted, and the stretchable portion 59 is deformed three-dimensionally as shown in Figure 8c.

[0062] As shown in FIG. 7a, in the initial state, the flexible printed wiring board 518 is three-dimensionally deformed, with the mounting portion 518a fixed to the lens holding member 505 and the hole of the through slit 56a provided in the expansion / contraction portion 59 fixed to the attachment portion 512a of the cover 512. Furthermore, as shown in FIG. 7b, when the lens holding member 505 is driven in one direction along the X axis, the ends 54a and 54b of the expansion / contraction portion 59 are further pulled apart, and the cut slits 55a and 55b and the through slits 56a to 56c are further opened while being three-dimensionally deformed. Furthermore, as shown in FIG. 7c, when the lens holding member 505 is driven in the other direction along the X axis, the ends 54a and 54b of the expansion / contraction portion 59 are further pulled apart in the opposite direction, and the cut slits 55a and 55b and the through slits 56a to 56c are further opened while being three-dimensionally deformed. Each slit contributes to the extension by being twisted unevenly and deforming into a generally rhombic or polygonal shape. Furthermore, when the lens holding member 505 is driven in a direction different from the X-axis direction, the ends 54a and 54b of the telescopic portion 59 are pulled apart in the direction different from the X-axis direction, and the cut slits 55a and 55b and the through slits 56a to 56c are further opened while undergoing a three-dimensional deformation. Thus, the telescopic portion 59 is at its shortest in the initial state shown in FIG. 7a. When the lens holding member 505 is driven in a plane generally perpendicular to the optical axis, it extends in the driving direction. At this time, part of the force pulling the telescopic portion 59 in the direction generally parallel to the optical axis becomes a force pulling in the opposite direction to the driving direction in the plane generally perpendicular to the optical axis, but this force is smaller than the force pulling in the direction generally parallel to the optical axis. In other words, the telescopic portion 59 follows the vibration-proof driving while constantly biasing the lens holding member 505 toward the cover 512.

[0063] Here, we will explain the amount of change in the sheet shape, known as a kirigami structure like the elastic part 59, and the tensile stress. Generally, when a sheet transitions from flat to in-plane deformation, the amount of change and the tensile stress maintain a proportional relationship. Then, as the amount of change increases and the sheet transitions from in-plane deformation 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.

[0064] As described above, in this embodiment, the flexible printed wiring board 518 is assembled by being three-dimensionally deformed, and is configured to be able 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 within a plane substantially perpendicular to the optical axis, the expandable portion 59 continues to undergo three-dimensional deformation, so even if the amount of deformation increases, the tensile stress remains almost constant, and there is no need to significantly increase the load on the lens holding member 505 when it is driven.

[0065] In this way, flexible printed wiring board 518 can have a shorter overall length than conventional flexible printed wiring boards due to the three-dimensional deformation of expansion / contraction section 59, thereby achieving cost reduction. Also, flat or curved area A of lens holding member 505 and cover 512, which are necessary for the movement of flexible printed wiring board 900 as in conventional flexible printed wiring boards, can be reduced, resulting in space-saving effects.

[0066] Furthermore, to facilitate three-dimensional deformation of the flexible portion 59, the widths (in the y-axis direction) of the peripheral connecting portions 58a-58c and the widths between the through slits 56a-56c and the cut slits 55a, 55b are narrower than the widths of the end portions 53a, 53b, making them more susceptible to breakage. While these flexible widths could be increased, this would result in a larger layout. Therefore, it is effective to attach a reinforcing plate to at least one of the inter-slit connecting portions 57a, 57b or the peripheral connecting portions 58a-58c to prevent breakage. Alternatively, resin adhesive may be applied to the ends of the cut slits 55a, 55b and the through slits 56a-56c to prevent breakage. Alternatively, dummy patterns may be formed at the ends of the cut slits 55a, 55b and the through slits 56a-56c in a direction perpendicular to the cut slits to reinforce the slits.

[0067] Alternatively, a reinforcing plate may be attached to the peripheral connecting portion 58c, instead of fixing the hole of the through slit 56c to the mounting portion 512a of the cover 512.

[0068] 9a and 9b show the peripheral connector 58c functioning as an attachment to the cover 512. FIG.

[0069] Fig. 9a is a perspective view of the peripheral connector 58c and the cover 512. Fig. 9b is a cross-sectional view of the peripheral connector 58c and the cover 512. In order to provide a detailed description of the flexible printed wiring board 518, the fixing member 504 is not shown.

[0070] 9a and 9b, cover 512 is provided with groove 512b for inserting peripheral connecting portion 58c. Groove 512b is formed in a direction different from the direction of extension and contraction of expandable portion 59, and is designed to prevent peripheral connecting portion 58c from coming out of groove 512b even when expansion and contraction is performed.

[0071] Also, adhesive or the like may be applied to the groove so that the peripheral connecting portion 58c is completely fixed.

[0072] Next, the wiring of the flexible printed wiring board 518 will be described.

[0073] The wiring of the flexible printed wiring board 518 is broadly composed of two wirings: a detection signal wiring and a drive signal wiring. Although the detailed wiring of the entire flexible printed wiring board 518 is not shown, the two wirings, the detection signal wiring and the drive signal wiring, run from the board connection part 518d through the expansion part 59 and split into two at the end of the mounting part 518a. One of the detection signal wirings is connected to the position sensor 517 on the mounting part 518a. The other drive signal wiring passes beside the position sensor 517 on the mounting part 518a and is connected to the coil soldering part 518c.

[0074] In general, detection signal wiring is susceptible to the influence of external noise, so it is desirable to reduce the influence of noise by increasing the distance between adjacent wiring, particularly between driving signal wiring.

[0075] Here, the wiring pattern of the stretchable portion 59 in this embodiment will be described.

[0076] FIG. 10 is a diagram illustrating the wiring pattern of the conductor layer in the stretchable portion 59. As shown in FIG. 10, the drive signal wiring 51 and the detection signal wiring 52 maintain a predetermined distance from the substrate connection portion 518d to the end 54b of the stretchable portion 59. The drive signal wiring 51 passes through one peripheral connecting portion 58c, and the detection signal wiring 52 passes through the other peripheral connecting portion 58c before joining at the inter-notch connecting portion 57b. At this time, it is desirable that the drive signal wiring 51 and the detection signal wiring 52 maintain the predetermined distance even at the inter-notch connecting portion 57b. Furthermore, the drive signal wiring 51 and the detection signal wiring 52 pass through the peripheral connecting portions 58a to 58c and the inter-notch connecting portions 57a and 57b and join again at the end 54a, but the flexible printed wiring board 518 is designed so that the drive signal wiring 51 and the detection signal wiring 52 do not run parallel to each other in close proximity. The drive signal wiring 51 and the detection signal wiring 52 maintain the predetermined distance from each other until they split into two at the end 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.

[0077] (Second embodiment) In the second embodiment, an embodiment will be described in which the expansion / contraction section 59 of the flexible printed wiring board 518 of the vibration isolation group 501 is arranged with the expansion / contraction direction of the expansion / contraction section 59 in the initial state tilted with respect to the optical axis.

[0078] The lens barrel and optical device according to the present invention will be described below, focusing on the differences from the first embodiment.

[0079] Fig. 11a is a perspective view showing a state before a flexible printed wiring board 518 and a lens holding member 505 of an image stabilization group 501 in a second embodiment of a lens barrel and an optical apparatus according to the present invention are shifted. Fig. 11b is a perspective view showing a state after the flexible printed wiring board 518 and a lens holding member 505 of an image stabilization group 501 in a second embodiment of a lens barrel and an optical apparatus according to the present invention have been shifted in one direction in the X-axis direction. Fig. 11c is a perspective view showing a state after the flexible printed wiring board 518 and a lens holding member 505 of an image stabilization group 501 in a second embodiment of a lens barrel and an optical apparatus according to the present invention have been shifted in the other direction in the X-axis direction. Note that fixing member 504 is not shown in order to provide a detailed description of flexible printed wiring board 518.

[0080] 11a, 11b, and 11c, a fixing member fixing portion 518e is disposed between the stretchable portion 59 and the substrate connecting portion 518d of the flexible printed wiring board 518. One end of the stretchable portion 59 is connected to the mounting portion 518a on which the position sensor 517 is mounted, and the other end has the fixing member fixing portion 518e for being positioned and fixed to the fixing member 504. In this embodiment, a positioning pin provided on the fixing member 504 (not shown) and the fixing member fixing portion 518e of the flexible printed wiring board 518 are positioned and fixed in position.

[0081] Next, the operation of the expansion / contraction unit 59 will be described. As shown in FIG. 11a, in the initial state, the mounting portion 518a of the flexible printed wiring 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), causing the expansion / contraction unit 59 to undergo a three-dimensional deformation. Furthermore, as shown in FIG. 11b, when the lens holding member 505 is driven in one direction in the X-axis direction, the ends 54a and 54b of the expansion / contraction unit 59 are further separated, and the cut slits 55a and 55b and the through slits 56a to 56c are further opened while undergoing a three-dimensional deformation. Furthermore, as shown in FIG. 11c, when the lens holding member 505 is driven in the other direction in the X-axis direction, the ends 54a and 54b of the expansion / contraction unit 59 approach each other, causing the cut slits 55a and 55b and the through slits 56a to 56c to contract while undergoing a three-dimensional deformation. Each slit contributes to the expansion or contraction by twisting unevenly and deforming into a generally rhombic or polygonal shape. Furthermore, when the lens holding member 505 is driven in a direction different from the X-axis direction, the ends 54a and 54b of the expandable portion 59 are pulled apart in the direction different from the X-axis direction, and the cut slits 55a and 55b and the through slits 56a to 56c are further opened while undergoing three-dimensional deformation. Thus, when the lens holding member 505 is driven in a plane substantially perpendicular to the optical axis, the expandable portion 59 expands or contracts depending on the driving direction. Even when the expandable portion 59 is fully contracted, the expandable portion 59 is configured to maintain its three-dimensional deformation. That is, as the lens holding member 505 moves in a plane substantially perpendicular to the optical axis, the expandable portion 59 continues to undergo three-dimensional deformation. Therefore, even if the amount of deformation increases, the tensile stress remains almost constant, and there is no need to significantly increase the load applied to drive the lens holding member 505.

[0082] While the telescopic unit 59 in the first embodiment is fixed and extends in substantially the same direction as the optical axis, the telescopic unit 59 in the second embodiment is fixed and extends at an angle with respect to the optical axis direction between the lens holding member 505 and the fixed member fixing portion 518e. This is to address the risk that the telescopic unit 59 may not be able to fully extend and may not be able to undergo three-dimensional deformation in the first embodiment when the image stabilization group 501 is configured to be thin in the optical axis direction. By tilting the extension / contraction direction of the telescopic unit 59 with respect to the optical axis direction, it is possible to ensure an extension range for the telescopic unit 59. Furthermore, even when the extension / contraction direction of the telescopic unit 59 is tilted with respect to the optical axis direction, the telescopic unit 59 follows the image stabilization drive while always biasing the lens holding member 505 toward the cover 512.

[0083] According to the second embodiment, the configuration of the expansion and contraction section 59 can be changed in accordance with the configuration of the vibration isolation group 501.

[0084] (Third embodiment) In the third embodiment, a configuration will be described in which the biasing member 511 of the vibration isolation group 501 is configured by an expandable portion 810 of a flexible printed wiring board 800 instead of a retractable spring.

[0085] The lens barrel and optical device according to the present invention will be described below, focusing on the differences from the first and second embodiments.

[0086] FIG. 12a is an enlarged view showing the biasing member 511 of the vibration isolation group 501 in the conventional example, and FIG. 12b is an enlarged view showing the attached state of the flexible printed wiring board 800 which is the biasing member 511 of the vibration isolation group 501 of the third embodiment.

[0087] As shown in FIG. 12a, biasing member 511 is made up of a retraction spring, and both ends of biasing member 511 are attached to third guide member 510 incorporated in lens holding member 505 and mounting portion 504a provided on fixed member 504, respectively. Due to its own spring properties, biasing member 511 exerts a pulling force that urges lens holding member 505 toward fixed member 504. It is preferable to provide multiple biasing members 511 at equally spaced phases relative to image stabilization group 501. Biasing member 511 pulls fixed member 504 and lens holding member 505 of image stabilization group 501 against each other, but in order to change the pulling force, it was necessary to prepare multiple types of retraction springs, which are biasing members 511, with the number of turns of the retraction springs adjusted.

[0088] 12b, the biasing member 511 is formed by a flexible printed wiring board 800, and the flexible printed wiring board 800 has an expansion / contraction portion 810. The expansion / contraction portion 810 of the flexible printed wiring board 800 is in an expanded state when assembled and is three-dimensionally deformed. The expansion / contraction portion 810 of the flexible printed wiring board 800 is provided with a plurality of through slits 820a to 820e, and the through slits 820a to 820e form holes by three-dimensionally deforming. The holes of the through slits 820a and 820e are attached to the third guide member 510 assembled in the lens holding member 505, the third guide member 510 provided on the fixed member 504, and the mounting portion 504a provided on the fixed member 504, respectively. The expansion / contraction portion 810 exerts a tensile force that urges the lens holding member 505 toward the fixed member 504 due to its own springiness. It is preferable that a plurality of extension / contraction sections 810 are provided at equally spaced phases with respect to the vibration isolation group 501. The extension / contraction sections 810 pull against each other the fixed member 504 and the lens holding member 505 of the vibration isolation group 501. It is possible to apply a stronger biasing force to the extension / contraction sections 810 by, for example, changing the location at which the extension / contraction sections 810 are attached to the attachment section 504a provided on the fixed member 504 from the through slit 820e to the through slit 820d.

[0089] Furthermore, flexible printed wiring board 800 may be configured independently as biasing member 511, or may be configured integrally with flexible printed wiring board 518 inside vibration isolation group 501. Furthermore, when flexible printed wiring board 800 is configured independently as biasing member 511, it does not need to have wiring running through it. On the other hand, when configured integrally with flexible printed wiring board 518, it may be used as an electrical connection via wiring. When flexible printed wiring board 800 and flexible printed wiring board 518 are configured integrally, it has the characteristics of both an electrical connection inside and outside vibration isolation group 501 and a retraction spring that biases fixing member 504 and lens holding member 505 against each other.

[0090] According to the third embodiment, two components can be configured into one component, which reduces costs and also makes it possible to easily change the biasing force of biasing member 511.

[0091] Although the 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 of the present invention. [Explanation of symbols]

[0092] 1 camera body 2 Grip section 3 Power control section 4 Mode Dial 5 Release button 6 Accessory shoe 7. Camera Mount 8 Rear operation section 9 Display section 10 Power supply section 11 Control section 12 Camera control unit 13 Storage section 14 Shutter unit 15 Shutter drive unit 16 image sensor 17 Image processing section 18 Focus detection unit 19 Pitch deviation detection unit 20 Yaw detection unit 101 Lens barrel 102 lens mount 104 Lens control unit 105 Electrical contacts 106 Fixed tube 107 Straight guide tube 108 Cam barrel 109 Elastic member 201 Focus Group 211 First Focus Lens 212 Second focus lens (adjustment group) 220 Mobile Cylinder Unit 221 Moving Cylinder 221a Recess 221b Reinforcement part 221c Straight groove 221d Circumferential groove 231 Moving Roller 241 Adjustment roller 251 Adjustment Group Retention Frame 251a Recess 301 Focus drive unit 311 Focus Motor 312 Reduction Gear 313 Cam barrel gear 401 Aperture Group 402 Aperture 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 part 505 Lens holding member 506 First Corrective Lens 507 Second Corrective Lens 508 First guide member 509 Second guide member 510 third guide member 511 biasing member 512 Cover 512a Mounting part 512b Groove 513 Coil 514 Drive Magnet 515 York 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 Cutting slits 56a~c Through slit 57a~c Connection between notches 58a~c Peripheral connection part 59 Telescopic part 518a,b mounting section 518c Coil soldering section 518d PCB connection part 518e Fixing member fixing part 519a, 520a, 520b, 520c, 521c V groove shape 522a, 522b, 522c, 522d rolling members 523 Shield Case 601 Fixed group 611 First Fixed Lens 612 Second Fixed Lens 701 Fixed tube 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 Telescopic part 820a~e Through slit 900 Flexible Printed Wiring Board 910 Bend 920 Mounting section 930 Coil soldering section 940 PCB connection part 950 Fixing member fixing part

Claims

1. A connecting member is provided, The connecting member is disposed across the fixing member and the holding member that holds the lens, Furthermore, it has an expandable and contractible part, The stretchable portion is provided with a plurality of through slits intersecting the stretchable direction and a plurality of peripheral connecting portions connected to the plurality of through slits, alternately arranged; Furthermore, the stretchable portion is provided with a plurality of cut slits that are cut in a direction parallel to the stretchable direction while facing each other, and a plurality of inter-slit connection portions that connect the cut slits that face each other, the connecting member is biased and held so as to attract the holding member and the fixing member to each other, The lens barrel according to claim 1, wherein the extension / contraction section extends and contracts in accordance with the movement of the holding member within a plane perpendicular to the optical axis.

2. 2. The lens barrel according to claim 1, wherein the holding member is held by the fixed member and is movable within a plane perpendicular to the optical axis by the action of a coil provided in the holding member and a magnet provided in the fixed member.

3. the connection member has a first wiring for driving the holding member and a second wiring for detecting the position of the holding member, 3. The lens barrel according to claim 1, wherein the first wiring and the second wiring run parallel to each other at the inter-notch connecting portion.

4. 4. The lens barrel according to claim 1, wherein a reinforcing plate is attached to at least one of the plurality of peripheral connecting portions and the plurality of inter-notch connecting portions.

5. 5. The lens barrel according to claim 4, wherein the reinforcing plate engages with a groove provided in the holding member or the fixing member, the groove extending in a direction different from the direction of extension and contraction.

6. A connecting member is provided, The connecting member is disposed across the fixing member and the holding member that holds the lens, Furthermore, it has an expandable and contractible part, The stretchable portion is provided with a plurality of through slits intersecting the stretchable direction and a plurality of peripheral connecting portions connected to the plurality of through slits, alternately arranged; Furthermore, the stretchable portion is provided with a plurality of cut slits that are cut in a direction parallel to the stretchable direction while facing each other, and a plurality of inter-slit connection portions that connect the cut slits that face each other, an attachment portion passing through at least one of the plurality of through slits, whereby the connection member is held by the holding member or the fixing member; The lens barrel according to claim 1, wherein the extension / contraction section extends and contracts in accordance with the movement of the holding member within a plane perpendicular to the optical axis.

7. 7. The lens barrel according to claim 6, wherein the holding member is held by the fixed member and is movable within a plane perpendicular to the optical axis by the action of a coil provided in the holding member and a magnet provided in the fixed member.

8. 8. The lens barrel according to claim 6, wherein the connecting member is held by being biased so as to attract the holding member and the fixing member to each other.

9. the connection member has a first wiring for driving the holding member and a second wiring for detecting the position of the holding member, 9. The lens barrel according to claim 6, wherein the first wiring and the second wiring run parallel to each other at the inter-notch connecting portion.

10. 10. The lens barrel according to claim 6, wherein the attachment portion has a protrusion extending in a direction along the optical axis and has a hook shape.

11. 11. The lens barrel according to claim 6, 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.

12. 12. The lens barrel according to claim 11, wherein the reinforcing plate engages with a groove provided in the holding member or the fixing member, the groove extending in a direction different from the extension / contraction direction.

13. A connecting member is provided, The connecting member is disposed across the fixing member and the holding member that holds the lens, Furthermore, it has an expandable and contractible part, The stretchable portion is provided with a plurality of through slits intersecting the stretchable direction and a plurality of peripheral connecting portions connected to the plurality of through slits, alternately arranged; Furthermore, the stretchable portion is provided with a plurality of cut slits that are cut in a direction parallel to the stretchable direction while facing each other, and a plurality of inter-slit connection portions that connect the cut slits that face each other, the expansion and contraction portion expands and contracts in accordance with the movement of the holding member in a plane perpendicular to the optical axis, A lens barrel characterized in that an adhesive is applied to the end of the through slit.

14. 14. The lens barrel according to claim 13, 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.

15. 15. The lens barrel according to claim 14, wherein the reinforcing plate engages with a groove provided in the holding member or the fixing member, the groove extending in a direction different from the extension / contraction direction.

16. 16. The lens barrel according to claim 1, wherein the connecting member is a flexible printed circuit board.

17. An optical device comprising the lens barrel according to any one of claims 1 to 16.

Images