JP7706909B2 - optical equipment - Google Patents

Description

The present invention relates to optical devices such as digital still cameras, video cameras, and interchangeable lenses, and in particular to optical devices having an arrangement of circuit components that constitute the power supply for an actuator and a flexible printed wiring board.

In recent years, optical devices such as digital cameras, video cameras, and interchangeable lenses, which have been required to be more compact, are often equipped with ultrasonic motors to achieve faster and quieter autofocus functions. The driving power supply for ultrasonic motors requires a circuit component (hereafter referred to as a step-up transformer) that boosts the supplied voltage and applies the desired AC voltage to the ultrasonic motor. Since leakage flux from the step-up transformer causes magnetic noise, a configuration that reduces leakage flux is required.

Patent document 1 discloses a drive device in which a boost unit is placed in a position different from the holding board on which the control unit and switching unit are mounted, and is placed close to the vibration actuator. According to the configuration described in Patent document 1, it is possible to shorten the wiring for the high-voltage drive signal flowing between the boost unit and the vibration actuator, making it possible to reduce the adverse effects of leakage magnetic flux.

Patent document 2 also discloses an optical device in which the circuit components constituting the power supply can be stored in a concave shape on the side of the lens barrel that is arranged on the inner circumference of the cam barrel. The configuration described in patent document 2 makes it possible to reduce magnetic noise while shortening the overall length of the optical device.

JP 2013-179787 A JP 2020-187232 A

However, in the configuration disclosed in Patent Document 1, the step-up transformer, which is a step-up unit, is placed on the outside of the cam barrel, which is the driven body. Generally, step-up transformers have a magnetic circuit such as a coil inside, and have a relatively large outer diameter as circuit components. Therefore, if the technology described in Patent Document 1 is used and the step-up transformer is placed on the outside of the cam barrel, the outer diameter of the optical device will become large.

In addition, when using the technology described in Patent Document 2, the step-up transformer and the movably bent flexible printed wiring board are arranged to overlap in the radial direction, which increases the outer diameter of the optical device.

In view of the above problems, the present invention provides an optical device in which a connection between the actuator and a circuit component that constitutes the actuator's power source is arranged so as to overlap with the cam roller in the circumferential direction, and a movable bending portion of the flex is arranged between the circuit component and the connection.

In order to achieve the above-mentioned object, the present invention provides an optical device comprising: a lens holding frame that holds a lens; an actuator that drives the lens holding frame; a cam barrel that can rotate around an optical axis; a lens barrel arranged on the inner circumference of the cam barrel; a connecting member that connects the cam barrel and the lens barrel; a circuit component arranged on a side of the lens barrel and constituting a power source for the actuator; and a circuit board arranged on the side of the lens barrel and electrically connecting the actuator and the circuit component, wherein the circuit component is arranged to overlap circumferentially with at least a portion of a first connecting member in the optical axis direction , a connection portion of the circuit board with the actuator is arranged to overlap circumferentially with at least a portion of a second connecting member in the optical axis direction, and the circuit board has a movable bending portion between the connection portion and the circuit component in the circumferential direction.

According to the present invention, circuit components can be arranged on the inner circumference of the cam barrel by utilizing the space on the side of the lens barrel, making it possible to miniaturize the optical device.

1A is a front perspective view of an interchangeable lens and a digital camera according to an embodiment of the present invention, and FIG. 1 is a block diagram showing the configurations of an interchangeable lens and a digital camera according to an embodiment of the present invention. 1 is a cross-sectional view of an interchangeable lens according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of a focus group unit in an embodiment of the present invention. 1A is a view of a focus group unit according to an embodiment of the present invention, as seen from a first cam roller side, and FIG. 1B is a view of a focus group unit according to an embodiment of the present invention, as seen from a second cam roller side. FIG. 2 is a diagram for explaining a cross section of a focus group unit in the embodiment of the present invention. 2A to 2C are diagrams illustrating a wiring pattern of a conductor layer of a flexible printed wiring board according to an embodiment of the present invention.

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

1 shows the appearance of an interchangeable lens (optical device) 101 in this embodiment and a digital camera (hereinafter referred to as a camera body) 1 to which the interchangeable lens 101 is detachably attached. FIG. 1(a) and FIG. 1(b) are perspective views showing the front side and the back side, respectively, of the camera body 1. As shown in FIG. 1(a), the optical axis direction in which the optical axis of the imaging optical system housed in the interchangeable lens 101 extends is the X-axis direction, and the directions perpendicular to this are the Z-axis direction (horizontal direction) and the Y-axis direction (vertical direction). Hereinafter, the Z-axis direction and the Y-axis direction are collectively referred to as the Z/Y-axis direction. In addition, the rotation direction around the Z-axis is referred to as the Pitch direction, and the rotation direction around the Y-axis is referred to as the Yaw direction. The Pitch direction and the Yaw direction (hereinafter collectively referred to as the Pitch/Yaw direction) are the rotation directions around two axes, the Z-axis and the Y-axis, which are perpendicular to each other.

As shown in FIG. 1(a), the left side of the camera body 1 when viewed from the front (the subject side) (the right side when viewed from the rear) is provided with a grip section 2 for 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 image capture becomes possible. 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.

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 imaging mode in which the user can set imaging conditions such as shutter speed and aperture value as desired, an auto still image imaging mode in which an appropriate exposure amount is automatically obtained, and a video imaging mode for capturing videos. In addition, the user can instruct imaging preparation operations such as autofocus and auto exposure control by half-pressing the release button 5, and can instruct imaging by fully pressing the button. Accessories such as an external flash and an external viewfinder (EVF), not shown, are detachably attached to the accessory shoe 6. In addition, an imaging element that photoelectrically converts (captures) the subject image formed by the imaging optical system in the interchangeable lens 101 is provided in the camera body 1.

The interchangeable lens 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 interchangeable lens 101 houses an imaging optical system that forms an image of a subject by focusing light from the subject. The outer periphery of the interchangeable lens 101 is provided with a zoom ring 103 that can be rotated around the optical axis by user operation. The outer periphery of the zoom ring 103 is provided with a knurled shape to prevent the user's hand from slipping when operating it. When the zoom ring 103 is rotated by the user, the zoom group that constitutes the imaging optical system moves to a predetermined optical position corresponding to the angle of the zoom ring 103. In this way, the user can capture an image at the desired angle of view.

As shown in FIG. 1(b), the rear 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 number of buttons and dials to which various functions are assigned. When the camera 1 is powered on and the still or video imaging mode is set, the display unit 9 displays a through image of a subject image captured by the imaging element. 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 the captured image is played back and displayed on the display unit 9 when the user operates the playback button.

Figure 2 is a block diagram showing the configuration of the interchangeable lens 101 and camera body 1 in this embodiment.

2, the camera body 1 has a power supply unit 10 that supplies power to the camera body 1 and the interchangeable lens 101, and an operation unit 11 including 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 the interchangeable lens 101 are controlled as an entire system by the camera control unit 12 provided in the camera body 1 and the lens control unit 104 provided in the interchangeable lens 101 linking with each other. The camera control unit 12 reads and executes a computer program stored in the memory unit 13. At that 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 in the lens mount 102. The electrical contact 105 includes a power terminal that supplies power from the power supply unit 10 to the interchangeable lens 101.

The imaging optical system of the interchangeable lens 101 has a zoom group 201 that is connected to the zoom operation ring 103 and moves in the optical axis direction to change the angle of view, and a lens vibration isolation group 301 that includes a shift lens as an anti-vibration element that reduces image blur. The lens vibration isolation group 301 performs an anti-vibration operation to reduce image blur by moving (shifting) the shift lens in the Z/Y axis direction perpendicular to the optical axis. The imaging optical system also has an aperture group 401 that performs a light amount adjustment operation, and a focus group 501 that includes a focus lens that moves in the optical axis direction to adjust the focus. Furthermore, the interchangeable lens 101 has an anti-vibration drive unit 302 that drives the lens vibration isolation group 301 to shift the shift lens, an aperture drive unit 402 that drives the aperture group 401, and a focus drive unit 502 that drives the focus group 501 to move the focus lens.

The camera body 1 has a shutter unit 14, a shutter drive unit 15, an image sensor 16, an image processing unit 17, and the camera control unit 12 described above. The shutter unit 14 controls the amount of light collected by the imaging optical system in the interchangeable lens 101 and exposed by the image sensor 16. The image sensor 16 photoelectrically converts the subject image formed by the imaging optical system and outputs an image signal. The image processing unit 17 performs various image processing on the image signal and then generates an image signal. The display unit 9 displays the image signal (through image) output from the image processing unit 17, displays the imaging parameters as described above, and plays back and displays the captured image recorded in the memory unit 13 or a recording medium (not shown).

The camera control unit 12 controls the driving of the aperture group 401 and the shutter unit 14 via the aperture drive unit 402 and the shutter drive unit 15 according to the aperture value and shutter speed setting values received from the operation unit 11. The camera control unit 12 also controls the driving of the focus group 501 according to the image capture preparation operation (half-press operation) on the operation unit 11 (release button 5). 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 transmits it to the camera control unit 12. At the same time, the focus drive unit 502 detects the current position of the focus group 501 and transmits the 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 501, calculates the focus drive amount from the amount of deviation, and transmits it to the lens control unit 104. The lens control unit 104 then controls the driving of the focus group 501 to the target position via the focus driving unit 502, and corrects the focus shift of the subject image.

Furthermore, when an automatic exposure control operation is instructed, the camera control unit 12 receives the luminance signal generated by the image processing unit 17 and performs a photometric calculation. Based on the result of this photometric calculation, the camera control unit 12 controls the driving of the aperture group 401 in response to an image capture instruction operation (full press operation) on the operation unit 11 (release button 5). At the same time, the camera control unit 12 controls the driving of the shutter unit 14 via the shutter driving unit 15, and performs exposure processing by the image sensor 16.

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 respectively 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 uses the shake signal from the pitch shake detection unit 19 to calculate the shift position in the Y axis direction of the lens vibration isolation group 301 (shift lens). Similarly, the camera control unit 12 uses the shake signal from the yaw shake detection unit 20 to calculate the shift position in the Z axis direction of the lens vibration isolation group 301. Then, the camera control unit 12 controls the lens vibration isolation group 301 to a target position according to the calculated shift position in the pitch/yaw direction, and performs an anti-shake operation to reduce image shake during exposure or during through image display.

The interchangeable lens 101 has a zoom ring 103 for changing the angle of view of the imaging optical system, and a zoom detection unit 106 for detecting the angle of the zoom ring 103. The zoom detection unit 106 detects the angle of the zoom ring 103 operated by the user as an absolute value, and is configured using, for example, a resistive linear potentiometer. Information on the angle of view detected by the zoom detection unit 106 is transmitted to the lens control unit 104, and is reflected in various controls by the camera control unit 12 described above. Meanwhile, part of this various information is recorded in the memory unit 13 or a recording medium together with the captured image.

Next, the positional relationship between the interchangeable lens 101 and the components in the camera body 1 will be explained using Figure 3.

Figure 3 is a cross-sectional view on the XY plane including the optical axis in this embodiment, showing the zoom retracted and extended states. The center line shown here roughly coincides with the optical axis determined by the imaging optical system, and so hereinafter it is synonymous with the optical axis.

As shown in FIG. 3, this embodiment employs a five-group configuration as an example of an imaging optical system. Each zoom group that has moved to a predetermined optical position according to the angle of view forms an image of light from a subject on the imaging surface of the imaging element 16. At this time, the zoom group 201 functions as the first zoom group, the lens vibration isolation group 301 functions as the second zoom group, the aperture group 401 functions as the third zoom group, and the focus group 501 functions as the fifth zoom group. The adjustment group 601 is arranged as the fourth zoom group. The adjustment group 601 maintains the optical performance of the entire imaging optical system by intentionally shifting its optical position and fixing it. By moving the adjustment group 601 to a desired position while checking the overall optical performance, it is possible to cancel adverse effects such as manufacturing errors and assembly variations that occur in each component. In addition, the protective glass 202 is intended to prevent the user from accidentally touching the lens groups and does not have any optical function, so it may be omitted. Note that the present invention does not limit the configuration of the lens groups, and for example, some of the lens groups may be fixed.

The fixed barrel 109 is fixed to the lens mount 102 and is a fixed component that holds the main board 800 on which the lens control unit 104 is mounted. The linear guide barrel 107 is also a fixed component that is fixed to the lens mount 102 via the fixed barrel 109. Bayonet claws (not shown) are arranged at equal intervals on the outer peripheral surface of the linear guide barrel 107. Meanwhile, a circumferential groove (not shown) is provided on the inner peripheral surface of the cam barrel 108. Furthermore, the cam barrel 108 is connected to the zoom operation ring 103. When the zoom operation ring 103 is rotated, the cam barrel 108 rotates around the optical axis due to the engagement between the bayonet claws and the circumferential groove.

The linear guide barrel 107 has linear guide grooves that restrict the movement of each zoom group in the rotational direction and guide its linear movement in the optical axis direction. The cam barrel 108 has cam grooves that correspond to each zoom group and have trajectories at different angles in the rotational direction. Meanwhile, the first through fifth zoom groups are each provided with a cam follower, and each cam follower engages with the corresponding linear guide groove and cam groove. When the user rotates the zoom operation ring 103, the cam barrel 108 rotates, and the cam followers engage with the linear guide grooves and cam grooves to simultaneously move each zoom group forward and backward in the optical axis direction.

Next, the characteristic parts that make up the present invention will be described in detail using Figures 4 to 7.

Figure 4 is an exploded perspective view of the focus group unit 500 and main board 800 in this embodiment, viewed obliquely from the front.

As shown in FIG. 4, the focus group unit 500 includes a lens barrel 510 and a focus group 501 and an adjustment group unit 600 housed therein. A linear vibration wave motor (hereinafter referred to as a vibration wave motor) 503, which is a type of ultrasonic motor, is mounted on the top surface of the lens barrel 510 as an actuator that constitutes part of the focus drive unit 502. The lens barrel 510 is held so that it can move linearly in the optical axis direction by the action of the cam barrel 108 and the linear guide barrel 107.

The vibration wave motor 503 has a long axis in the optical axis direction, and moves the focus group 501 in the optical axis direction via a connecting member (not shown) in response to an instruction from the lens control unit 104. The vibration wave motor 503 is composed of a motor movable part 504 having a vibrator and a motor fixed part 505 having a friction member. The vibrator is composed of a vibration plate having a friction contact part and a piezoelectric element fixed to the back surface of the vibration plate with an adhesive or the like. The vibration plate is pressurized and contacts the friction member at the friction contact part. Meanwhile, the circuit components are electrically connected to the piezoelectric element via a flexible printed wiring board 700 (circuit board). In detail, the driving flexible printed wiring board 507 electrically connected to the piezoelectric element is connected to a driving connector 702a mounted on the connection part 702, thereby enabling electrical connection with the circuit components on the flexible printed wiring board 700 and the main board 800. The circuit components and the connection part 702 become farther away from the imaging surface as the focal length moves to the telephoto side.

When a two-phase AC voltage is applied to the piezoelectric element as a drive signal, vibrations (ultrasonic vibrations) with a frequency in the ultrasonic range are excited. As a result, a resonance phenomenon occurs in the transducer, which deforms and generates elliptical motion at the frictional contact area. At this time, changing the frequency or phase of the two-phase AC voltage applied to the piezoelectric element changes the direction of rotation and elliptical ratio of the elliptical motion. In this way, the lens control unit 104 is able to control the traveling waves generated in the vibrating body, and drives and controls the focus group 501 to the target position. The focus drive unit 502 generates drive pulses with a relatively high frequency, and switches the circuit using these drive pulses.

The lens barrel 510 is also provided with cam rollers 511 that engage with the cam barrel 108 (not shown), and the cam rollers are arranged at three locations, including one not shown, at intervals of 120° in the circumferential direction.

The flexible printed circuit board 700 is attached to the lens barrel 510, and has a board connection section 703 that connects to a connector (not shown) mounted on the main board 800. In addition, it has a movable bending section 704 so that it can be integrated with the lens barrel 510 and moved forward and backward in the optical axis direction when the user rotates the zoom operation ring 103.

Figure 5 is a diagram illustrating the flexible printed wiring board 700 in this embodiment.

Figure 5(a) is a side view of the focus group unit 500 and main board 800 seen from the first cam roller 511 side. Figure 5(b) is a side view of the focus group unit 500 and main board 800 seen from the second cam roller 512 side.

As shown in Figures 5(a) and (b), the flexible printed wiring board 700 is composed of a circuit mounting section 701 on which a step-up transformer 701a and an inductor 701b, which are part of the circuit that constitutes the power supply for the focus drive section 502, are mounted, a connection section 702 on which a drive connector 702a is mounted, a board connection section 703, and a movable bending section 704.

The circuit mounting portion 701 forms a surface perpendicular to the image sensor 16, and is arranged so as to overlap at least a portion of the first cam roller 511 in the circumferential direction, and is further arranged on the subject side of the first cam roller 511 in the optical axis direction. The connection portion 702 is arranged so as to overlap at least a portion of the second cam roller 512 in the circumferential direction, and is further arranged on the subject side of the second cam roller 512 in the optical axis direction.

Figure 6 is a cross-sectional view of Figure 5(b) taken from the subject side along a plane perpendicular to the optical axis in this embodiment.

As shown in FIG. 6, the movable bending portion 704 is disposed between the circuit mounting portion 701 and the connection portion 702 in the circumferential direction. That is, the movable bending portion 704 is disposed between the first cam roller 511 and the second cam roller 512 in the circumferential direction, and the circuit mounting portion 701, the connection portion 702, and the movable bending portion 704 are disposed on different faces of the lens barrel in the circumferential direction. The lens holding frame 520 holds the lens. The lens holding frame 520 is driven linearly in the optical axis direction by the action of the focus driving portion 502.

The lens barrel 510, which has a wide range of movement in the optical axis direction, such as an ultra-telephoto zoom lens, needs to have a wide plane 510a to allow the movable bending part 704, which moves as a unit, to move in the optical axis direction. However, since the lens barrel 510 has cam rollers arranged at intervals of 120° in the circumferential direction, if an attempt is made to ensure a sufficient plane in the optical axis direction in the phase where the cam rollers are located in the circumferential direction, the overall length of the lens barrel 510 will increase, leading to an increase in the size of the interchangeable lens 101 itself. Therefore, in this embodiment, the circuit mounting part 701 and the connection part 702 are arranged in the phase where the cam rollers are located in the circumferential direction of the lens barrel 510, and a plane for the movable bending part 704 is arranged in the phase where the cam rollers are not located in the circumferential direction. In this way, in this embodiment, the space is effectively utilized, and the lens barrel 510 and the interchangeable lens 101 are made smaller. Furthermore, by arranging the circuit mounting section 701, the connection section 702, and the movable bending section 704 on different sides of the lens barrel 510, the circuit mounting section 701 and the movable bending section 704 do not overlap in the radial direction, for example, which is also effective in reducing the size in the radial direction.

Next, we will explain the step-up transformer 701a.

The resonant circuit consisting of the step-up transformer 701a and the inductor 701b makes it possible to output a voltage higher than the voltage supplied to the lens control unit 104. When power is supplied to the step-up transformer 701a via the flexible printed wiring board 700, it generates a magnetic flux in the winding axis direction of the coil inside. In this embodiment, as an example, a case where a magnetic flux is generated in the thickness direction (701c direction) of the step-up transformer 701a is shown. If such a magnetic flux is generated in the process in which the image sensor 16 generates and outputs an image signal, the fluctuation may be superimposed on the image signal as magnetic noise, degrading the image quality. More specifically, when the magnetic noise reaches the image sensor 16, a magnetic field that changes the pixel charge information signal line from which the image signal is extracted at a high frequency penetrates it. This causes magnetism due to electromagnetic induction in the signal line, and as a result, noise is generated in the pixel charge information signal line.

In this embodiment, the step-up transformer 701a is positioned so that the magnetic flux generated does not intersect perpendicularly with the imaging surface. Specifically, the magnetic flux generated by the step-up transformer 701a faces the 701c direction shown in FIG. 6, so the step-up transformer 701a is positioned so that the 701c direction faces the optical axis. In addition, by forming the cam barrel 108 from a conductive metal, the magnetic flux leaking from the outer periphery of the cam barrel 108 in the 701c direction can be reduced. The magnetic flux generated by the step-up transformer 701a tries to pass through the cam barrel 108 made of metal, but if a change in magnetic flux density occurs during this process, an eddy current is generated by electromagnetic induction. As a result, the magnetic flux penetrating the cam barrel 108 is reduced, making it possible to reduce magnetic noise.

Figure 7 is a diagram illustrating the wiring pattern of the conductor layer of the flexible printed wiring board 700 in this embodiment.

As shown in FIG. 7, the flexible printed circuit board 700 is composed of two main wires to transmit the drive signal for driving the drive motor 503.

The first wiring 710 is a wiring pattern from the board connection part 703 to the step-up coil 701a, and transmits a drive signal from the main board 800 having the lens control part 104 to the circuit components of the step-up transformer 701a and the inductor 701b. The second wiring 720 is a wiring pattern from the step-up coil 701a to the drive connector 702a, and outputs a voltage higher than the voltage supplied to the main board 800 by the resonant circuit of the step-up transformer 701a and the inductor 701b, and transmits a drive signal to the drive motor 503.

Generally, the wiring of the drive signal is prone to affect adjacent wiring with noise, so it is desirable to reduce the effect of noise on adjacent wiring by increasing the distance between the wiring. Although the first wiring 710 and the second wiring 720 are both drive signals, the second wiring 720 is at a high voltage due to the boost coil 701a described above, so it is thought that the effect of noise on adjacent wiring will be greater. For this reason, the flexible printed wiring board 700 is designed to provide a hole 705 between the first wiring 710 and the second wiring 720 so that the first wiring 710 and the second wiring 720 do not run adjacent to each other.

In addition, if the distance between the first wiring 710 and the second wiring 720 is made larger than necessary, the flat surface 510a on the lens barrel 510, which allows the movable bending portion 704 to move forward and backward in the optical axis direction, will be unnecessarily widened, and the overall length of the lens barrel 510 will increase. Therefore, by bringing the first wiring 710 into close proximity with the second wiring 720 only at the arc portion 710a, the noise effect on the first wiring 710 caused by the second wiring 720 is reduced and the lens barrel 510 can be made smaller.

Furthermore, by providing the hole 705, the width of the flex portion 706 that connects the circuit mounting portion 701 and the movable bending portion 704 can be narrowed. This makes it easier to bend the circuit mounting portion 701 and the movable bending portion 704 when attaching them to different surfaces of the lens barrel 510, improving assembly.

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. For example, a hard board based on a rigid base material such as glass epoxy may be used instead of the flexible printed wiring board 700. In addition, the use of the step-up transformer 701a and the inductor 701b is not limited, and they may be part of a circuit that constitutes a power source for a stepping motor or a voice coil motor, etc., as an example of an actuator that drives a lens group.

REFERENCE SIGNS LIST 1 Digital camera body 16 Image sensor 101 Interchangeable lens 103 Zoom operation ring 108 Cam barrel 510 Lens barrel 511 First cam roller 512 Second cam roller 700 Flexible printed wiring board 701 Circuit mounting section 702 Connection section 703 Board connection section 704 Movable bending section 705 Hole section 710 First wiring 710a Circular arc section 720 Second wiring 800 Main board

Claims (9)

a lens holding frame for holding a lens;
an actuator that drives the lens holding frame;
a cam barrel rotatable around an optical axis;
a lens barrel disposed on an inner periphery of the cam barrel;
a connecting member that connects the cam barrel and the lens barrel;
a circuit component arranged on a side surface of the lens barrel and constituting a power source for the actuator;
a circuit board that is disposed on a side surface of the lens barrel and electrically connects the actuator and the circuit component;
the circuit component is disposed so as to overlap at least a portion of the first connecting member in a circumferential direction in the optical axis direction ,
a connection portion of the circuit board with the actuator is disposed so as to overlap at least a portion of the second coupling member in a circumferential direction in an optical axis direction ;
The optical device according to claim 1, wherein the circuit board has a movable bent portion between the connection portion and the circuit component in a circumferential direction. The optical device according to claim 1, characterized in that the lens barrel holds the actuator. 3. The optical device according to claim 1, wherein the circuit component and the connection portion are both arranged to overlap the actuator in the circumferential direction. Further, the device has a main substrate,
the circuit board has a first wiring that connects the main board and the circuit component, and a second wiring that connects the circuit component and the actuator,
4. The optical device according to claim 1, further comprising a hole provided between the first wiring and the second wiring. Further, the device has a main substrate,
the circuit board has a first wiring that connects the main board and the circuit component, and a second wiring that connects the circuit component and the actuator,
the first wiring has an arc portion;
5. The optical device according to claim 1, wherein the second wiring is adjacent to the first wiring at the arc portion. The optical device according to any one of claims 1 to 5, characterized in that the lens holding frame is driven linearly in the optical axis direction by the action of the actuator. 7. The optical device according to claim 1, wherein the lens barrel is held so as to be movable linearly in the optical axis direction by the action of the cam barrel and a guide barrel arranged on the inner periphery of the cam barrel. the circuit component and the connection portion are provided on the subject side of the coupling member in the optical axis direction,
8. The optical device according to claim 1, wherein the circuit components and the connection parts are spaced farther from an imaging surface as the focal length moves toward the telephoto side. The optical device according to any one of claims 1 to 8, characterized in that the circuit board is a flexible printed wiring board.

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