JP6448198B2 - Electronic devices and optical equipment - Google Patents

Description

  The present invention relates to an electronic apparatus such as a lens barrel and an optical apparatus.

  When power and control signals are supplied to the electronic components in the lens barrel through a flexible printed circuit board (FPC), it is common to press the FPC against the holding member using an elastic member. Accordingly, the FPC can be stably held, and an electronic component such as a sensor mounted on the FPC can be positioned and fixed. In particular, a sensor or the like has a problem that detection accuracy is lowered unless it is positioned and fixed. Patent Document 1 discloses an FPC fixing structure in which locked portions are provided on both sides in the width direction of the FPC, and the locked portion is locked by the locking portion with the FPC sandwiched between the drive units. .

JP 2008-65179 A

  However, the structure of Patent Document 1 increases the number of parts due to the sheet metal member and the screws that fix it, leading to an increase in size and cost and weight.

  An exemplary object of the present invention is to provide an electronic apparatus and an optical apparatus capable of fixing a flexible printed board to a fixing member with a small number of parts.

The electronic device of the present invention includes a flexible printed circuit board and a fixing member to which the flexible printed circuit board is fixed. The flexible printed circuit board is folded in a state of being bent; A first portion and a second portion on which a force separating from each other by the bending acts; and the fixing member prevents the first portion from moving away from the second portion. A first contact portion that contacts the second portion, and a second contact portion that contacts the second portion, wherein the first contact portion includes a first locking portion and a second locking portion. wherein said first portion of said flexible printed circuit board, together with the wiring is provided in the region of the outer circumferential side of the flexible printed circuit board than the area provided by the first locking portion Look including the second engagement portion to be engaged by the first engagement portion and the second locking portion to be locked, the direction in which the first portion moves away by the deflection from the second portion When the separation direction is set, the first engagement portion is configured to press the first engagement portion from a direction opposite to the separation direction, and the second engagement portion is The second engaging portion is configured to be pressed from a direction opposite to the separating direction .

  According to the present invention, it is possible to provide an electronic apparatus and an optical apparatus that can fix a flexible printed board to a fixing member with a small number of components.

It is sectional drawing of the imaging system of this embodiment. It is a system block diagram of the imaging system shown in FIG. It is the perspective view and top view of a vibration isolator shown in FIG. It is a top view of the movement group and fixed group of a vibration isolator shown in FIG. It is the perspective view and sectional drawing explaining fixation of the flexible printed circuit board shown in FIG. It is a perspective view of the holding part holding the flexible printed circuit board shown in FIG. It is an expanded view of the flexible printed circuit board shown in FIG.

  FIG. 1 is a cross-sectional view of an imaging system (optical apparatus) that includes an interchangeable lens 200 and a camera body 500. The interchangeable lens (lens unit) 200 is an optical device configured to be detachable from the camera body 500. The camera body 500 is configured as a single-lens reflex camera (optical device) in the present embodiment, but may be configured as a mirrorless camera. The present invention can be applied not only to a digital still camera but also to a digital video camera, a lens-integrated camera, or an electronic device using a flexible printed circuit board (FPC).

  The interchangeable lens 200 has a photographing optical system that forms an optical image of a subject. The photographing optical system according to the present embodiment includes a first group lens 1, a second group lens 3, a third group lens 5, an anti-vibration lens 7, a focus lens 9, a fifth group lens 12, and an aperture unit 34.

  Reference numeral 2 denotes a first group lens barrel that holds the first group lens 1, 17 denotes a first group cylinder that fixes the first group lens barrel, 4 denotes a second group lens barrel that holds the second group lens 3, and 6 denotes a third group lens 5. This is a third group barrel. The image stabilizing lens 7 corrects image blur by moving in a direction perpendicular to the optical axis, and is held by the image stabilizing device 8. The vibration isolator 8 is fixed to the third group barrel 6.

  Reference numeral 10 denotes a focus lens barrel that holds the focus lens 9 and is moved in the optical axis direction by a guide mechanism and a drive mechanism provided in the fourth group lens barrel 11 to perform focus adjustment. Reference numeral 13 denotes a fifth group barrel that holds the fifth group lens 12. The diaphragm unit 34 adjusts the amount of light and is fixed to the third group barrel 6.

  Reference numeral 14 denotes a guide cylinder which is a holding member, and 16 denotes a cam ring which is rotatably fitted to the outer periphery of the guide cylinder 14. Reference numeral 23 denotes a fixed barrel, which fixes the guide tube 14. Reference numeral 31 denotes a printed circuit board on which a lens driving IC, a microcomputer, and the like are arranged, and is fixed to the fixed barrel 23.

  27 is a ring unit, and 32 is a mount. The mount 32 is screwed to the fixed barrel 23. The appearance ring unit 27 is sandwiched and fixed between the fixed barrel 23 and the mount 32. Reference numeral 19 denotes a manual focus ring (MF) unit, which is supported so as to be rotatable about a fixed barrel 23. When the MF unit 19 is rotated, the rotation is detected by a sensor (not shown), and manual focus adjustment is performed according to the rotation amount.

  Reference numeral 33 denotes a contact block, which is connected to the printed circuit board 31 by wiring (not shown) (FPC or the like) and fixed to the mount 32 with screws. The interchangeable lens 200 is bayonet-fixed to the camera body 500 with a mount 32. When the interchangeable lens 200 is fixed to the camera body 500 with the mount 32, the printed circuit board 31 that controls the operation of each lens can communicate with the camera body 500 through the contact block 33.

  Reference numeral 600 denotes an imaging element mounted on the camera body 500, which is a photoelectric conversion element such as a CMOS or CCD that photoelectrically converts an optical image formed by the photographing optical system.

  FIG. 2 is a block diagram illustrating an electrical configuration of the imaging system.

  Reference numeral 501 denotes a camera CPU (camera control means) constituted by a microcomputer, which controls the operation of each unit in the camera body 500. The camera CPU 501 communicates with the lens CPU 201 (lens control means) of the interchangeable lens 200 via the electrical contacts 502 and 202 when the interchangeable lens 200 is mounted.

  Information (signals) transmitted from the camera CPU 501 to the lens CPU 201 includes drive amount information, parallel shake information, and out-of-focus information of the focus lens 9. Information (signal) transmitted from the lens CPU 201 to the camera CPU 501 includes imaging magnification information. The electrical contacts 502 and 202 include contacts for supplying power from the camera body 500 to the interchangeable lens 200.

  A power switch 503 that can be operated by the photographer is a switch for starting the camera CPU 501 and starting power supply to each actuator, sensor, and the like in the camera system.

  Reference numeral 504 denotes a release switch that can be operated by the photographer, and includes a first stroke switch SW1 and a second stroke switch SW2. A signal from the release switch 504 is input to the camera CPU 501. The camera CPU 501 enters a shooting preparation state in response to an ON signal input from the first stroke switch SW1. In the shooting preparation state, measurement of subject brightness by the photometry unit 505 and focus detection by the focus detection unit 506 are performed. The camera CPU 501 calculates the aperture value of the aperture unit 34, the exposure amount of the image sensor 600 (in shutter seconds), and the like based on the photometric result.

  Based on the focus detection result (defocus amount and defocus direction) by the focus detection unit 506, the camera CPU 501 drives the focus lens 9 and the focus lens barrel 10 to obtain the in-focus state (including the drive direction). ). Information on the driving amount (focus lens driving amount information) is transmitted to the lens CPU 201. The lens CPU 201 controls the operation of each component of the interchangeable lens 200.

  The camera CPU 501 controls image stabilization by the image stabilization device 8. When the ON signal from the second stroke switch SW2 is input, the camera CPU 501 transmits an aperture drive command to the lens CPU 201 to set an aperture value via the aperture unit 34. Further, the camera CPU 501 transmits an exposure start command to the exposure unit 507, causes the mirror (not shown) to be retracted and the shutter (not shown) to be opened, and exposes the imaging unit 508 including the imaging element 600.

  An image pickup signal from the image pickup unit 508 (image pickup element 600) is digitally converted by a signal processing unit in the camera CPU 501, subjected to various correction processes, and output as an image signal. An image signal (data) is recorded and stored in a recording medium such as a semiconductor memory such as a flash memory, a magnetic disk, or an optical disk in an image recording unit 509.

  Reference numeral 204 denotes an MF ring rotation detection unit, which includes the MF unit 19 and its rotation detection unit. Reference numeral 205 denotes a ZOOM ring rotation detection unit, which includes a manual zoom ring 35 and a sensor (not shown) that detects the rotation. Reference numeral 206 denotes an anti-vibration device drive unit, which includes a drive actuator of the anti-vibration device 8 that performs an anti-vibration operation and a drive circuit thereof.

  Reference numeral 209 denotes an AF driving unit that performs AF driving of the focus lens barrel 10 through an AF motor in accordance with focus lens driving amount information transmitted from the camera CPU 501. Reference numeral 208 denotes an electromagnetic aperture drive unit, which is controlled by the lens CPU 201 that has received an aperture drive command from the camera CPU 501 to operate the aperture unit 34 in an aperture state corresponding to a specified aperture value.

  Reference numeral 211 denotes an angular velocity sensor mounted on the interchangeable lens 200 and connected to the printed circuit board 31. The angular velocity sensor 211 outputs to the lens CPU 201 angular velocity signals indicating respective angular velocities of vertical (pitch direction) shake and lateral (yaw direction) shake, which are angular shakes of the camera system.

  The lens CPU 201 integrates the pitch velocity and yaw angular velocity signals from the angular velocity sensor 211 electrically or mechanically, and the pitch direction shake amount and the yaw direction shake amount, which are displacement amounts in the respective directions (summarizing them). (Also referred to as angular deflection). Further, the lens CPU 201 controls the image stabilization device driving unit 206 based on the combined displacement amount of the angle shake amount and the parallel shake amount to shift the moving group 700 of the image stabilization device 8 to perform the angle shake correction and the parallel shake correction. I do. Further, the lens CPU 201 controls the AF driving unit 209 based on the focus shift amount to drive the focus lens barrel 10 in the optical axis direction to perform focus adjustment.

  Energization of detection signals such as zoom, focus, and anti-vibration operations from the detection means to the lens CPU 201 and control signals from the lens CPU 201 to each actuator is performed by FPC. Hereinafter, a method of wiring and supporting the FPC according to this embodiment will be described.

  FIG. 3A is a perspective view of the vibration isolator 8, and FIG. 3B is a plan view of the vibration isolator 8. The vibration isolator 8 has a moving group 700 and a fixed group 800. The moving group 700 is configured to be movable with respect to the fixed group 800.

  FIG. 4A is a plan view of the moving group 700 of the vibration isolator 8, and FIG. 4B is a plan view of the fixed group 800 of the vibration isolator 8. As illustrated in FIG. 4A, the moving group 700 includes a holding frame 701 that holds the antivibration lens 7. As shown in FIG. 4B, the fixed group 800 has a base 82.

  As shown in FIG. 3B, the holding frame 701 and the base 82 are connected in the optical axis direction of the vibration-proof lens 7 by two springs (tensile springs) 93 and are urged toward each other. This prevents rotation of the holding frame 701 around the optical axis and separation from the base 82 in the optical axis direction. FIG. 3A shows a hook portion of the spring 93.

  Further, the two springs 93 are disposed so as to be inclined from the optical axis direction of the vibration-proof lens 7. The holding frame 701 is urged against the base 82 by two springs 93 with the ball 94 (FIG. 1) interposed therebetween in the optical axis direction. When the sandwiched ball 94 rolls, the holding frame 701 can move in a direction perpendicular to the optical axis, and thus the vibration-proof lens 7 can be shifted from the optical axis. Note that the “orthogonal direction” only needs to have an orthogonal component, and may be moved obliquely from the optical axis.

  FIG. 7 is a development view of the FPC 81 shown in FIG. The base 82 is a fixing member to which the FPC 81 is fixed. As shown in FIG. 7, the Hall element 91 is mounted on the mounting portion 812 of the FPC 81. The Hall element 91 is a sensor (electronic component) that detects a magnetic field using the Hall effect. The hall elements 91 are provided at two locations 90 degrees apart from each other in the circumferential direction.

  In the present embodiment, the Hall element 91 is soldered to the mounting portion 812 of the FPC 81, but soldering is not always necessary. The attachment portion 812 may be replaced with a connection portion that is pressed and electrically connected to the Hall element 91.

  The Hall element 91 is connected to a control board (not shown) via the FPC 81, and the control board is used to control the entire digital camera on which a CPU, a signal processing circuit, and the like to be described later are mounted. In addition to the Hall element 91, a soldering portion 814 of a coil 92 is connected to the FPC 81.

  As shown in FIGS. 3B and 4A, the holding frame 701 is provided with a magnet 96, a yoke 95, and a coil 92 as means for moving the holding frame 701. The hall element 91 and the soldering portion 814 of the coil 92 are soldered in opposite directions.

  The magnet 96 is magnetized in the optical axis direction, and is composed of an inner magnet 96a and an outer magnet 96b. The polarities of the inner magnet 96a and the outer magnet 96b are opposite to each other. The magnetic field generated by the magnet 96 is detected by the control board as the output of the two Hall elements 91. When the holding frame 701 moves, the magnetic field passing through the Hall element 91 changes, whereby the output of the Hall element 91 changes and the position of the holding frame 701 can be detected.

  As shown in FIG. 4B, a coil 92 is disposed on the opposite side of the magnet 96 from the yoke 95, and the coil 92 is attached to the base 82. The coil 92 is connected to a control board (not shown) via the FPC 81, and an electromagnetic force is generated by passing a current through the coil 92, so that the holding frame 701 can be moved.

  A mounting portion (electronic component mounting portion) 812 of the Hall element 91 of the FPC 81 is supported by a contact surface (supporting portion) 820a of a holding portion 820 that holds the Hall element 91 provided on the base 82 shown in FIG. Yes. FIG. 6 is a perspective view around the holding portion 820.

  The FPC 81 is folded while being bent at the folding portion 811, and an elastic force is generated in the FPC 81 by the folding portion 811, and the Hall element 91 is held in the holding portion 820 using this elastic force. Due to the bending, the first portion 815 and the second portion 816 shown in FIG. In the present embodiment, the folding portion 811 shown in FIG. 7 is bent into a mountain shape.

  The first portion 815 is provided with two pairs of engaging portions 810a and 810b. The second portion 816 is provided with a mounting portion 812 and a pair of engaging portions 817. The FPC 81 covers the wiring with an insulating material, but the engaging portions 810a, 810b, and 817 are not provided with the wiring.

  The back surfaces of the pair of engaging portions 817 in FIG. 7 and the back surfaces of the pair of engaging portions 810a are close to each other. The pair of inner locking portions 821a locks the pair of engaging portions 810a, and the pair of outer locking portions 821b locks the pair of engaging portions 810b.

  As a result, the first portion 815 is pressed so as to prevent the first portion 815 from moving away from the second portion 816. The holding portion 820 supports the supported portion 812a of the second portion 816 on the contact surface 820a. That is, the holding portion 820 functions as a second contact portion that comes into contact with the second portion 816.

  FIG. 5A is a perspective view for explaining a method of fixing the FPC 81 to the base 82, and FIG. 5B is a sectional view thereof. As shown in FIG. 5B, the Hall element 91 is positioned on the holding portion 820 side in the FPC 81. As shown in FIGS. 5B and 6, the holding portion 820 is formed with a penetrating portion 820 b, and the Hall element 91 is inserted into the penetrating portion 820 b, whereby the Hall element 91 is positioned in the holding portion 820. The Note that a recess may be provided instead of the through portion 820b. That is, a penetration part or a recessed part is sufficient.

  As shown in FIGS. 5 to 7, the Hall element 91 soldered to the mounting portion 812 of the FPC 81 is inserted into the holding portion 820 by press-fitting. Thereby, the radial position of the Hall element 91 is determined. The supported portion 812a around the mounting portion 812 of the FPC 81 is in contact with the contact surface 820a, and the position of the Hall element 91 in the optical axis direction is determined. Since the Hall element 91 is positioned and is not biased during detection, the detection accuracy of the Hall element 91 can be maintained. In addition, since it is not necessary to fix the hall element 91 using an elastic member and a screw, the number of parts can be reduced, and the size, cost, and weight can be reduced.

  The FPC 81 has a positioning portion 813 in the width direction, and the positioning of the hall element 91 in the circumferential direction is achieved by engaging the positioning pin 823 of the base 82. The positioning portion 813 includes an inner positioning portion 813a and an outer positioning portion 813b, and the positioning pin 823 includes an inner positioning pin 823a and an outer positioning pin 823b, which function as a pair of shaft portions that position the FPC 81.

  The inner positioning portion 813a and the inner positioning pin 823a, and the outer positioning portion 813b and the outer positioning pin 823b are engaged with each other. The inner side is the side close to the optical axis of the image stabilizing lens 7, and the outer side is the side far from the optical axis of the image stabilizing lens 7.

  As shown in FIGS. 5A and 6, when viewed from above, a line M connecting the center lines of the inner positioning pin 823a and the outer positioning pin 823b is the center line of the Hall element 91 arranged in the holding portion 820. It is comprised so that it may correspond substantially. The Hall element 91 is disposed between the pair of pins 823.

  The Hall element 91 is stably held by providing a plurality of locking portions 821 (a pair of inner locking portions 821a and a pair of outer locking portions 821b) on both sides of the center line of the Hall element 91 that intersects with the pair of pins. Can do. The locking portion 821 functions as a first contact portion that contacts the first portion 815. The locking portion 821 locks and presses the engaging portion 810 and prevents the Hall element 91 from being separated from the holding portion 820 due to the elastic force of the folding portion 811. By this pressing, the mounting portion 812 of the FPC 81 is urged toward the holding portion 820 of the base 82. The electronic component is not limited to the Hall element 91, and the FPC 81 can be stably held using the elastic force of the FPC 81 even if the electronic component is not present. However, this embodiment is particularly effective when applied to a sensor that maintains detection accuracy in a positioned state.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this, A various deformation | transformation and change are possible within the range of the summary.

  The present invention can be applied to an electronic device using an FPC, an optical device such as a lens barrel, and a lens-integrated camera (imaging device).

81 ... Flexible printed circuit board, 82 ... Base (fixing member), 91 ... Hall element (electronic component), 811 ... Folding part, 815 ... First part, 816 ... Second part, 820 ... Holding part (support part, (Second contact part), 820a ... abutment surface (support part), 820b ... penetrating part, 821 ... locking part (first contact part)

Claims (9)

A flexible printed circuit board;
A fixing member to which the flexible printed circuit board is fixed;
Have
The flexible printed circuit board includes a folded portion that is folded in a state of being bent, and a first portion and a second portion on which a force separating from each other by the bending of the folded portion acts.
The fixing member includes: a first contact portion that contacts the first portion so as to prevent the first portion from separating from the second portion; and a second contact that contacts the second portion. A contact portion,
The first contact portion includes a first locking portion and a second locking portion,
Said first portion, said out of the flexible printed circuit board, together with the wiring is provided in the region of the outer circumferential side of the flexible printed circuit board than the area provided, the locking by the first locking portion look including the second engagement portion to be engaged by the first engagement portion and the second locking portion being,
When the direction in which the first portion is separated from the second portion by the bending is a separation direction,
The first locking portion is configured to press the first engaging portion from a direction opposite to the separating direction,
The second locking portion is configured to press the second engaging portion from a direction opposite to the separating direction.
An electronic device characterized by that. An electronic component electrically connected to the second portion of the flexible printed circuit board on the second contact portion side;
The electronic device according to claim 1, wherein the electronic component is a sensor positioned at the second contact portion.   The electronic device according to claim 2, wherein the flexible printed circuit board further includes a mounting portion for the electronic component, and the electronic component is soldered to the mounting portion.   The electronic device according to claim 2, wherein the flexible printed circuit board further includes a connection portion that is electrically connected to the electronic component by being pressed by the electronic component.   5. The electronic device according to claim 2, wherein a penetrating portion or a concave portion is formed in the second contact portion, and the electronic component is inserted into the penetrating portion or the concave portion. . A pair of shafts for positioning the flexible printed circuit board;
6. The electronic device according to claim 2, wherein a pair of first contact portions is provided on both sides of a center line of the electronic component that intersects with the pair of shaft portions. The second portion includes a third engagement portion provided outside the region where the wiring is provided in the flexible printed board,
The back surface of the third engaging portion is close to the back surface of the first engaging portion;
The electronic device according to claim 1, wherein the electronic device is an electronic device.   The electronic apparatus according to claim 1, wherein the electronic apparatus is an optical apparatus that includes a photographing optical system and is detachable from a camera body. The electronic device is an optical device including a camera body and a photographing optical system.
The electronic device according to claim 1, wherein the electronic device is an electronic device.