JP6016618B2 - Electronics - Google Patents

Description

  The present invention relates to an electronic device having an operation member that is movable with respect to a device body.

  Conventionally, in an imaging apparatus such as a digital still camera or a video camera, an optical zoom function for changing a magnification by moving a part of a lens of an imaging optical system on an optical axis and an image signal from an imaging element are electrically used. Some have a digital zoom function that is controlled to perform enlarged display of the screen. Some of such imaging devices are provided with an operation member that is movable with respect to the apparatus body in order to realize an optical zoom function and a digital zoom function. The operation member is held at a neutral position (initial position) when not operated, and is moved from the neutral position to a first direction and a second direction opposite to the first direction by a user operation. Can do. When the user moves the operation member from the neutral position in the first direction, the zoom magnification of the optical zoom function or the digital zoom function can be increased, and when the user moves in the second direction, the zoom magnification can be decreased.

  A torsion spring may be used to apply an urging force in the direction of the neutral position during operation to an operation member (hereinafter also referred to as a zoom operation member) used for changing the zoom magnification as described above. However, when a torsion spring is used, a vibration sound, a collision sound, or the like of the torsion spring is generated as the zoom operation member moved from the neutral position returns to the neutral position.

  Therefore, in Patent Document 1, in the configuration in which the urging force for returning the zoom lever to the neutral position is applied by the torsion spring, the vibration sound, the collision sound, and the like of the torsion spring are reduced by always contacting the tip of the torsion spring with the elastic member. An imaging device has been proposed.

JP2012-113110A

  However, in the conventional technique disclosed in Patent Document 1 described above, when the user operates the zoom lever, the elastic member formed of rubber and the torsion spring formed of metal rub against each other. That is, there is a problem that the elastic member and the torsion spring are rubbed each time the user operates the zoom lever, and the elastic member is scraped by friction. As the elastic member is shaved, the member covered by the elastic member and the torsion spring come into contact with each other, making it impossible to reduce vibration noise, collision noise, and the like of the torsion spring.

  Therefore, an object of the present invention is to reduce a sound generated by performing an operation on an operation member even when a user repeatedly performs an operation on an operation member that is movable with respect to the apparatus main body.

  In order to achieve the above object, an electronic device according to the present invention includes an operation member that is movable from an initial position with respect to a device body, and a spring member that biases the operation member so that the position of the operation member is the initial position. When the operation member is at the initial position, it is sandwiched between the pair of arm portions of the spring member, and contacts the at least one of the pair of arm portions of the spring member when the operation member is moved. An elastic member, and an attachment shaft that moves integrally with the operation member when the operation member moves. The elastic member has a cylindrical shape, and the attachment shaft is inserted into a hollow portion. And is held so as to be rotatable with respect to the mounting shaft.

  ADVANTAGE OF THE INVENTION According to this invention, even if a user repeats operation to the operation member which can move with respect to an apparatus main body, the sound produced by performing operation to an operation member can be reduced.

1A and 1B are external perspective views of a digital camera according to the present invention, in which FIG. 1A is a perspective view showing the front of the digital camera, FIG. 1B is a perspective view showing the back of the digital camera, and FIG. It is a perspective view which can see the front, left side, and bottom face of a camera. It is a partial expansion perspective view of the digital camera concerning the present invention. 2A is a perspective view of the camera body 1 with the front cover unit 3 removed, as viewed from the subject side, and FIG. 2B is a perspective view of only the front cover unit 3 as viewed from the back side. It is the expansion | deployment perspective view which looked at the front cover unit 3 of the digital camera which concerns on this invention from the to-be-photographed object side. 2 is a detailed view of a zoom ring 15 and a release ring 16 of the digital camera according to the present invention. FIG. 4A shows a state before the zoom ring 15 and the release ring 16 are attached to the front cover unit 3, FIG. 4B shows the release ring 16 viewed from the photographer side, and FIG. ) Is a view of the zoom ring 15 as seen from the photographer side. It is a figure for demonstrating the motion of each part seen from the to-be-photographed object side when the zoom ring 15 is rotated. 5A is a cross-sectional view showing a state in which the zoom ring 15 is in a neutral position, FIG. 5B is a cross-sectional view showing a state in which the zoom ring 15 is rotated by a predetermined angle in the Q direction, and FIG. (C) It is sectional drawing which showed the state which rotated the zoom ring 15 to the limit in Q direction. It is WW sectional drawing in Fig.5 (a). It is a figure for demonstrating the motion of each part seen from the photographer side when the zoom ring 15 is rotated. 7A is a cross-sectional view showing a state in which the zoom ring 15 is in a neutral position, FIG. 7B is a cross-sectional view showing a state in which the zoom ring 15 is rotated by a predetermined angle in the Q direction, and FIG. (C) is a sectional view showing a state in which the zoom ring 15 is rotated to the limit in the Q direction.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings, taking a digital camera as an electronic device as an example.

  FIG. 1 is a perspective view of a digital camera (hereinafter referred to as a camera) in the present embodiment. FIG. 1A is a perspective view in which the front (subject side surface) can be seen, and FIG. FIG. 1C is a perspective view in which the front, left side, and bottom are visible. Reference numeral 1 denotes a camera main body (device main body), and 2 denotes a display unit that is supported by a hinge portion (not shown) so as to be rotatable within a predetermined angle range with respect to the camera main body 1. The camera body 1 and the display unit 2 are electrically connected by an unillustrated FPC (flexible wiring board).

  A display unit 2a displays an image such as a liquid crystal display or an organic EL display. The display unit 2a incorporates a touch panel such as a capacitance type or a pressure-sensitive type. By operating the screen with a finger, settings at the time of shooting with the camera, playback of recorded images, enlargement / reduction of images, Various operations such as image sending / editing and communication setting are possible. The display unit 2a can also display various information such as shooting conditions such as shutter speed and aperture value, the number of shots, and menus.

  A lens barrel unit 4 includes a photographing optical system lens, a photoelectric conversion element such as a CCD or a CMOS, and a mechanism (zoom mechanism) for changing the focal length of the photographing optical system lens.

  Reference numeral 5 denotes a power button for turning on or off the camera. Reference numeral 6 denotes a mode switching lever, which is used for switching a shooting mode (for example, a still image mode or a moving image mode) at the time of shooting. Reference numeral 7 denotes a communication button, which is a button for starting wireless communication. Reference numeral 8 denotes a playback button. When pressed, the display mode is changed from the shooting mode to the playback mode, and the recorded still image or moving image can be displayed on the display unit 2a.

  Reference numeral 10 denotes a strap base for passing a strap string (not shown), and two strap bases are provided on the left side and the right side of the camera. Reference numeral 11 denotes a battery lid, which is slidably and rotatably held with respect to the camera body 1. When the battery cover 11 is opened, a battery that is detachably loaded into the camera can be inserted and removed. A card lid 12 is supported so as to be slidable and rotatable with respect to the camera body 1. When the card cover is opened, a recording medium detachable from the camera can be inserted and removed. Reference numeral 13 denotes a tripod seat, which is used when shooting with a tripod fixed.

  Reference numeral 14 denotes an illumination window made of a transparent member, which is irradiated from a light source disposed in the camera during low-illuminance shooting (still image shooting or moving image shooting) or low-illuminance AF (autofocus). Light is guided and diffused. Reference numeral 15 denotes an operation member that is movable with respect to the device main body, and is a zoom ring that can be rotated within a predetermined range in two directions from a neutral position that is an initial position. The zoom ring 15 has an annular shape, is made of metal to ensure strength, and has conductivity. And it arrange | positions so that the lens-barrel unit 4 may be enclosed in the surface orthogonal to an imaging | photography optical axis, and it is used in order to change the zoom magnification by an optical zoom function or a digital zoom function.

  Specifically, the zoom ring 15 is in a range of a predetermined angle with respect to the camera body 1 from the neutral position in the P direction and the Q direction (shown in FIG. 1A) with the photographing optical axis as the rotation center. It is supported so that it can rotate inside. When the zoom ring 15 is rotated in the P direction from the neutral position, the zoom magnification is changed to the telephoto (TELE) side, and when the zoom ring 15 is rotated in the Q direction from the neutral position, the zoom magnification is changed to the wide angle (WIDE) side. Further, the zoom ring 15 is configured to return to the neutral position by a return spring 27 (see FIG. 3) described later when the user finishes the operation of the zoom ring 15 while the user rotates the zoom ring 15. .

  Reference numeral 16 denotes a release ring, which is a photographing instruction member for giving a photographing instruction, and is arranged so as to surround the lens barrel unit 4 in an annular shape and in a plane orthogonal to the photographing optical axis. Further, the release ring 16 is supported so as to be linearly movable within a predetermined range from the neutral position in the R direction and S direction (shown in FIG. 1A) orthogonal to the photographing optical axis. The photographing operation is executed by moving the lens in the direction or the S direction.

  FIG. 1 shows a state in which the zoom ring 15 and the release ring 16 are in the neutral position. In the neutral position, the zoom ring 15 has an operation part 15a on the camera upper surface side and an operation part 15b on the camera bottom surface side. It is provided to improve user operability. In addition, the release ring 16 is provided with a concavo-convex portion 16a on the top surface side of the camera and a concavo-convex portion 16b on the bottom surface side of the camera as indices when the user operates.

  Next, the configuration of the zoom ring 15 and the release ring 16 will be described in detail with reference to FIGS. FIG. 2 is a partially exploded perspective view of the camera according to the present embodiment, and FIG. 2A is a perspective view of the camera body 1 with the front cover unit 3 to be described later removed as viewed from the subject side. FIG. 2B is a perspective view of only the front cover unit 3 as viewed from the back side.

  In FIG. 2A, a battery 17 for supplying power to the camera is disposed on the right side of the lens barrel unit 4 in the camera body 1, and a main board 9 on which a main CPU and the like are mounted is disposed on the left side. The main board 9, the display unit 2, the lens barrel unit 4, and the battery 17 are electrically connected by an FPC (not shown). A detailed description of this connection is omitted.

  On the main board 9, a front FPC connector 9a provided in the front cover unit 3 described later is disposed. Reference numeral 40 denotes a main chassis serving as a main structure of the camera, which is formed of a conductive metal. Electrical connection between the main chassis 40 and the ground pattern of the main board 9 is ensured, and the ground pattern of the main board 9 and the main chassis 40 have the same potential.

  Reference numeral 3 denotes a front cover unit. The front cover unit 3 includes a front cover 18 that is an exterior, a front inner 19 that is a base member, a front FPC 20, a zoom ring 15, a release ring 16, and the like.

  The front inner 19 is a member to which a zoom ring 15 that is a rotation operation member and a release ring 16 that is a photographing instruction member are attached, and is formed of a non-conductive resin. The main chassis 40 and the front cover 18 are electrically connected by the front cover 18 being in contact with the main chassis 40 and being fixed with screws. That is, the front cover 18 is in a state of being electrically connected to the ground pattern of the main board 9 through the main chassis 40.

  A front FPC 20 in which a resin front inner 19 is attached to the inner surface side of the front cover 18 made of conductive metal, and a switch for detecting an operation on the zoom ring 15 and the release ring 16 is mounted on the front inner 19. Is attached. A front end of the front FPC 20 has a connecting portion 20a. The connecting portion 20a is connected to the connector 9a of the main board 9, and transmits a signal indicating an operation state of the zoom ring 15 and the release ring 16 to the main CPU. The main CPU receives this signal and controls the lens barrel unit 4 and the like.

  The front inner 19 supports the zoom ring 15 so as to be rotatable within a predetermined angle range with respect to the neutral position. The zoom ring 15 is pivotally supported by the front inner 19. The release ring 16 is attached to the front inner 19 with the zoom ring 15 in between so as to be linearly movable within a predetermined range with reference to the neutral position.

  Next, a detailed configuration of the front cover unit 3 will be described with reference to FIG. FIG. 3 is an exploded perspective view of the front cover unit 3 as viewed from the subject side.

  The release ring 16 is configured by bonding two components, a release base 21 made of resin and a release cap 22 made of metal, in order to improve design and strength. On the release base 21, pushers 21a and 21b for pressing release switches 20c and 20d described later extend.

  The zoom ring 15 is made of metal to improve the strength, and is provided with an attachment shaft 15e (see FIG. 4) for attaching an elastic member 37 (see FIG. 4) described later. The elastic member 37 has a cylindrical shape and is attached so as to surround the attachment shaft 15e. Reference numeral 23 denotes a sliding sheet, which is attached to the zoom ring 15 and improves sliding when the zoom ring 15 is rotated.

  A resinous front inner 19 is fitted and fixed to the opening of the front cover 18. The front inner 19 is provided with an opening in the center, and the lens barrel unit 4 passes through this opening.

  Next, various components attached to the front inner 19 will be described. Reference numeral 20 denotes a front FPC, on which a detection switch 20b for detecting the rotation of the zoom ring 15 and release switches 20c and 20d for detecting a direct movement of the release ring 16 are mounted.

  The detection switch 20b rotates the zoom ring 15, that is, the rotation for changing the zoom magnification to the telephoto direction and the rotation for changing to the wide-angle direction, by the protrusions that are held so as to be movable in two directions. To detect. The release switches 20c and 20d are metal dome switches. The release switch 20c detects an operation of the release ring 16 from the camera top surface direction, and the release switch 20d detects an operation of the release ring 16 from the camera bottom surface direction. Reference numerals 29 and 30 denote pressing members for fixing the detection switch 20b and the release switches 20c and 20d to the front inner 19. After the front FPC 20 is attached to the front inner 19, the pressing members 29 and 30 are placed on the front FPC 20, and the pressing members 29 and 30 are fixed to the front inner 19 with screws.

  A release plate 31 is formed of metal and serves to prevent the release base 21 from coming off. Two release plates 31 are arranged on the left and right sides of the optical axis, and are screwed to screw bosses 21c, 21d, 21e, and 21f provided on the release base 21 so as to sandwich the front inner 19 with the release base 21. .

  Reference numeral 32 denotes a spring unit for returning the release ring 16 to the neutral position, and a total of two spring units are arranged on the left and right sides of the optical axis. The spring unit 32 is configured to cover the periphery of the metal shaft with a coil spring and sandwich both ends of the coil spring with holding members, and is inserted into the spring accommodating recesses 19a and 19b of the front inner 19 in a compressed state. . There are pocket-shaped recesses for press-fitting the metal shaft 24 above and below the spring accommodating recesses 19a, 19b of the front inner 19, and the spring unit 32 is attached to the front inner 19 by press-fitting the metal shaft into the recesses. It is fixed against.

  Reference numeral 27 denotes a return spring that is a torsion spring formed of a conductive metal, and 28 denotes a spring pressing member formed of a conductive metal that prevents the return spring 27 from falling off. The return spring 27 is a spring member that urges the rotated zoom ring 15 to return to the neutral position. The boss of the front inner 19 is inserted into the end winding portion 27a (see FIG. 5) of the return spring 27, and the spring pressing member 28 is covered so as to contact the end winding portion 27a. By attaching to 19, the return spring 27 can be prevented from falling off. A part of the spring pressing member 28 elastically contacts the inner wall of the front cover 18 formed of a conductive metal, and the spring pressing member 28 and the front cover 18 are electrically connected.

  The pair of arms 27b of the return spring 27, which is a torsion spring, sandwiches the spring hook shaft 19k provided on the front inner 19 and the elastic member 37 attached to the attachment shaft 15e of the zoom ring 15 (see FIGS. 5 and 7). reference). When the zoom ring 15 is in the neutral position, the elastic member 37 is sandwiched between the pair of arm portions 27b and compressed. Further, when the zoom ring 15 is rotated, the elastic member 37 contacts at least one of the pair of arm portions 27b.

  Here, by forming the elastic member 37 from an elastomer material having conductivity, the elastic member 37 pressed by the return spring 27 and the zoom ring 15 come into contact with each other and are electrically connected to each other. Therefore, the zoom ring 15 can electrically connect the zoom ring 15 and the front cover 18 via the elastic member 37, the return spring 27, and the spring pressing plate 28.

  Reference numeral 34 denotes a compression coil spring, 35 denotes a spherical member, and 36 denotes a pressing plate. The pressing plate 36 is positioned and fixed to the front inner 19, and one of the holes provided in the front inner 19 is closed by the pressing plate 36. The hole of the front inner 19 incorporates a coil spring 34 and a spherical member 35, and is covered with a pressing plate 36 and the zoom ring 15. The spherical member 35 is pressed against the zoom ring 15 by the biasing force of the coil spring 34 to prevent the zoom ring 15 from rattling in the optical axis direction.

  Next, the attachment structure of the zoom ring 15 and the release ring 16 will be described with reference to FIG. FIG. 4 is a detailed view of the zoom ring 15 and the release ring 16, and FIG. 4A shows a state before the zoom ring 15 and the release ring 16 are attached to the front cover unit 3. 4B is a view of the release ring 16 viewed from the photographer side, and FIG. 4C is a view of the zoom ring 15 viewed from the photographer side.

  First, the mounting structure of the zoom ring 15 and the release ring 16 will be described along the mounting order with reference to FIG.

  First, the zoom ring 15 is attached to the front cover unit 41 (hereinafter referred to as a temporary front cover unit) in a state where the zoom ring 15 and the release ring 16 are not attached (semi-finished state). On the inner peripheral surface of the zoom ring 15, a guide surface 15d is provided as a guide when the zoom ring 15 rotates. On the other hand, the front inner 19 is also provided with a guide surface 19c serving as a guide when the zoom ring 15 rotates. The zoom ring 15 is provided with a recess 15c for moving the protrusion of the detection switch 20b in two directions. As shown in FIG. 4B, an attachment shaft 15e for attaching the elastic member 37 is provided on the photographer side of the zoom ring 15, and is inserted into the hole 37a of the cylindrical elastic member 37. A minimal gap is provided between the mounting shaft 15e and the hole 37a (hollow portion) of the elastic member so that the elastic member 37 can rotate with respect to the mounting shaft 15e. That is, the diameter of the hole 37a of the elastic member 37 is slightly larger than the diameter of the mounting shaft 15e.

  An extension 15e ′ (first extension) extending in the radial direction of the attachment shaft 15e is provided at the tip of the attachment shaft 15e. In the radial cross section of the mounting shaft 15e including the extending portion 15e, the radial length of the mounting shaft 15e is larger than the length of the hole 37a of the elastic member.

  The elastic member 37 is attached straight in the axial direction of the attachment shaft 15e while being elastically deformed when passing through the extending portion 15e ′. In order to improve the assemblability, it is desirable that the corner of the extension portion 15e ′ has a tapered shape (a shape in which the radial length of the mounting shaft 15e is shorter as the tip of the mounting shaft 15e is closer). .

  The elastic member 37 is attached to the attachment shaft 15e, and the elastic member 37 is sandwiched between the pair of arm portions 27b of the return spring 27.

  An extension part 37b (second extension part) extending in the radial direction of the elastic member 37 is provided at the tip of the elastic member 37 (the end opposite to the base side of the mounting shaft 15e). The extending portion 37b extends in the radial direction of the elastic member 37 from the extending portion 15e ′. In addition, when the zoom ring 15 returns from the rotated state to the neutral position, the extending portion 37b is configured so that one arm portion 27b of the return spring 27 that is separated from the elastic member 37 has a predetermined position on the elastic member 37. It has a shape that invites it to abut.

  The front inner 19 is provided with a fan-shaped through hole 19m so that an elastic member 37 attached to the attachment shaft 15e of the zoom ring 15 can be inserted. When the zoom ring 15 is attached to the front inner 19, the attachment shaft 15 e and the elastic member 37 are inserted into the through hole 19 m of the front inner 19, and the elastic member 37 is sandwiched by the return spring 27. At this time, the zoom ring 15 is not prevented from coming off in the optical axis direction with respect to the temporary front cover unit 41.

  Next, the release ring 16 including the release base 21 and the release cap 22 is attached to the temporary front cover unit 41. As shown in FIG. 4B, the release base 21 includes pushers 21a and 21b, square ribs 21g, 21h, 21i, and 21j that are spring hook portions of coil springs of the spring unit 32, screw bosses 21c, 21d, 21e, and 21f. Is provided on the object side surface. The front inner 19 is provided with openings for passing the pushers 21a, 21b and the screw bosses 21c, 21d, 21e, 21f.

  Further, guide ribs 21k are provided in the vicinity of the roots of the screw bosses 21c, 21d, 21e, and 21f. The guide rib 21k slides with two guide surfaces 19d on the left and right sides of the front inner 19, and the release base 21 is guided so as to move directly with respect to the front inner 19.

  Here, two holes on the left and right release plates 31 are inserted into a positioning shaft provided near the screw boss of the release base 21, and then the release base 21 and the release plate 31 are fixed with screws 33. To do. By doing so, the release base 21, that is, the release ring 16, cannot be removed in the optical axis direction. Furthermore, since the zoom ring 15 is sandwiched between the release ring 16 and the temporary front cover unit 41, the zoom ring 15 is prevented from coming off in the optical axis direction. The front cover unit 3 is completed by assembling as described above.

  Next, the movement of each part when the zoom ring 15 is rotated will be described with reference to FIGS. FIG. 5 is a diagram for explaining the movement of each part viewed from the subject side when the zoom ring 15 is rotated. Specifically, FIG. 5A is a diagram showing a state in which the zoom ring 15 is in a neutral position, and FIG. 5B is a diagram showing a state in which the zoom ring 15 is rotated by a predetermined angle in the Q direction. FIG. 5C is a diagram showing a state in which the zoom ring 15 is rotated in the Q direction to the rotation limit. 6 is a cross-sectional view taken along the line WW in FIG. 5A, and FIG. 7 is a diagram for explaining the movement of each part viewed from the photographer side when the zoom ring 15 is rotated. 7A to 7C correspond to the states of FIGS. 5A to 5C, respectively.

  In addition to the recess 15c, the guide surface 15d, and the mounting shaft 15e described above, a rotation limiting surface 15i that limits the rotation angle (movement range) of the zoom ring 15 is also provided on the inner peripheral surface of the zoom ring 15. . The front inner 19 is provided with a rotation limiting surface 19j for limiting the rotation angle of the zoom ring 15 in addition to the guide surface 19c, the spring hanging shaft 19k and the through hole 19m.

  As shown in FIG. 5A, when the zoom ring 15 is in the neutral position, the pair of arm portions 27b of the return spring 27 is attached to the spring hook shaft 19k of the front inner 19 and the attachment shaft 15e of the zoom ring 15. The elastic member 37 is sandwiched. At this time, the elastic member 37 is compressed by the pair of arm portions 27b.

  As shown in FIG. 6, in the elastic member 37 attached to the attachment shaft 15e, the movement of the attachment shaft 15e in the axial direction is restricted by the extending portion 15e 'provided on the attachment shaft 15e. Further, the movement of the attachment shaft 15 e in the axial direction of the pair of arm portions 27 b of the return spring 27 is restricted by the extending portion 37 b of the elastic member 37.

  The zoom ring 15 can be rotated in the P direction and the Q direction with the photographing optical axis of the lens barrel unit 4 as a rotation center, and the user operates the zoom ring 15 and is in a neutral position (FIG. 5A ), The zoom ring mounting shaft 15e also moves from the neutral position.

  As the mounting shaft 15e moves, one of the pair of arm portions 27b of the return spring 27 moves and the return spring 27 is charged (the state shown in FIG. 5B). Therefore, when the zoom ring 15 is rotated from the neutral position, a force is generated in which the charged return spring 27 tries to return to the original position, and the return spring 27 applies a biasing force to the mounting shaft 15e.

  As the mounting shaft 15e moves, the elastic member 37 rubs against the return spring 27, and a frictional force Fp or Fq is generated at the portion of the elastic member 37 that contacts the return spring 27. Since the elastic member 37 is rotatably attached to the attachment shaft 15e, a moment Mp or Mq that rotates the elastic member 37 is generated by the frictional force Fp or Fq, and the elastic member 37 rotates with respect to the attachment shaft 15e. Will do. By rotating the elastic member 37 with respect to the attachment shaft 15 e, it is possible to reduce the friction between the return spring 27 and the elastic member 37, and it is possible to suppress the elastic member 37 from being scraped by friction with the return spring 27.

  In the state where the zoom ring 15 is in the neutral position (the state shown in FIG. 5A), the elastic member 37 is at the center of the fan-shaped through hole 19 m of the front inner 19. The elastic member 37 has a round cross section near the base of the mounting shaft 15e, but the portion of the return spring 27 that contacts the arm portion 27b is sandwiched between the pair of arm portions 27b, so that it deforms into an oval cross section. ing. At this time, the protrusion of the detection switch 20b is not moved by the end of the recess 15c of the zoom ring 15, and the output signal of the detection switch 20b is OFF.

  When the zoom ring 15 is rotated until it reaches the state shown in FIG. 5B, the protrusion of the detection switch 20b is moved by the end of the recess 15c of the zoom ring 15, and the output signal of the detection switch 20b is turned on. Become. When the output signal of the detection switch 20b is turned on, the zoom magnification changing operation is started.

  During the transition from the state shown in FIG. 5A to the state shown in FIG. 5B, the arm portion 27b of the return spring 27 abuts against the elastic member 37 instead of the mounting shaft 15e formed of metal. Therefore, the rubbing sound is reduced.

  5B, one of the side walls of the fan-shaped through hole 19m of the front inner 19 and the elastic member 37 come into contact with each other. At this time, the rotation limiting surface 15 i provided on the inner periphery of the zoom ring 15 and the rotation limiting surface 19 j provided on the front inner 19 are not in contact with each other. In this way, the hard material such as the mounting shaft 15e and the side wall of the fan-shaped through hole 19m does not contact each other, but the elastic member 37 and the side wall of the fan-shaped through hole 19m contact each other. The collision sound that occurs can be reduced. Furthermore, since vibration of the zoom ring 15 that occurs at the time of contact can be suppressed, the operational feeling of the user operating the zoom ring 15 can be improved.

  When the zoom ring 15 is rotated from the state shown in FIG. 5B to the state shown in FIG. 5C, the rotation limiting surface 15 i provided on the inner periphery of the zoom ring 15 and the front inner 19 are provided. The rotation limiting surface 19j comes into contact with the zoom ring 15, and further rotation of the zoom ring 15 is limited. At this time, the elastic member 37 between the side wall of the fan-shaped through hole 19m of the front inner 19 and the mounting shaft 15e is deformed into a D shape, reducing the force applied to the mounting shaft 15e and damaging the mounting shaft 15e. Is preventing. That is, before the front inner 19 that is a movement limiting member that restricts the movement of the zoom ring 15 and the zoom ring 15 come into contact with each other, the elastic member 37 comes into contact with the front inner 19 to rotate the zoom ring 15. It is possible to suppress the occurrence of impact and collision noise.

  When the operation on the zoom ring 15 is completed with the zoom ring 15 rotated as shown in FIG. 5C, the zoom ring 15 returns to the neutral position by the biasing force of the return spring 27. When returning to the neutral position, one of the arm portions 27b of the return spring 27 that is not in contact with the elastic member 37 when the zoom ring 15 is rotating contacts the elastic member 37. Therefore, it is possible to reduce the collision sound that occurs when the zoom ring 15 returns to the neutral position.

  Next, the rotation operation of the elastic member 37 accompanying the transition from the state shown in FIG. 5A to the state shown in FIG. 5C will be described in detail with reference to FIGS.

  In FIG. 7, in order to explain the rotation operation of the elastic member 37, the first straight line connecting the rotation center of the zoom ring 15 and the center of the mounting shaft 15 e of the zoom ring 15, and the arm of the elastic member 37 and the return spring 27. A second straight line connecting the contact position with the portion 27b and the center of the mounting shaft 15e is shown.

  In the state where the zoom ring 15 shown in FIG. 7A is in the initial position, the first straight line and the second straight line are substantially orthogonal.

  When the zoom ring 15 is rotated in the Q direction to reach the state shown in FIG. 7B, the angle formed by the first straight line and the second straight line becomes larger than that shown in FIG. 7A. Here, when the elastic member 37 does not rotate with respect to the mounting shaft 15e, the contact position between the elastic member 37 and the arm portion 27b moves in the direction opposite to the Q direction, and the elastic member 37 and the arm move with the movement of the contact position. The portion 27b is rubbed. Therefore, when the zoom ring 15 is repeatedly rotated, the elastic member 37 is scraped.

  On the other hand, in this embodiment, the elastic member 37 is rotatable with respect to the mounting shaft 15e, and instead of the contact position between the elastic member 37 and the arm portion 27b moving, the elastic member 37 is caused by the rotational moment Mq described above. It rotates in the direction opposite to the Q direction. Therefore, the contact position between the elastic member 37 and the arm portion 27b does not change greatly, and the elastic member 37 and the arm portion 27b can be prevented from rubbing.

  When the zoom ring 15 is rotated in the Q direction to the state shown in FIG. 7C, the angle formed by the first straight line and the second straight line is larger than the state shown in FIG. 7B. It gets bigger. However, since the elastic member 37 rotates in the direction opposite to the Q direction, the contact position between the elastic member 37 and the arm portion 27b does not change significantly, and the elastic member 37 and the arm portion 27b can be prevented from rubbing.

  As described above, in the present embodiment, the elastic member 37 that contacts the return spring 27 that biases the zoom ring 15 back to the neutral position can be rotated with respect to the mounting shaft 15 e that holds the elastic member 37. I made it. With such a configuration, the elastic member 37 rotates with respect to the mounting shaft 15 e as the zoom ring 15 rotates, and therefore it is possible to suppress the elastic member 37 from being scraped by friction with the return spring 27. Therefore, even if the operation on the zoom ring 15 is repeated, the effect of reducing the operation sound by the elastic member 37 can be maintained, and the sound generated by the operation on the zoom ring 15 can be reduced.

  In the above embodiment, in order to smoothly rotate the elastic member 37 with respect to the mounting shaft 15e, the frictional force between the wall surface of the hole 37a of the elastic member 37 and the mounting shaft 15e is applied to the elastic member 37 and the arm portion of the return spring 27. It is preferable to make it smaller than the frictional force with 27b. Therefore, the surface shape may be different between the inner peripheral surface of the elastic member 37 (wall surface of the hole 37a) and the outer peripheral surface of the elastic member 37 (contact surface with the arm portion 27b). Alternatively, a lubricant may be applied to the inner peripheral surface of the elastic member 37 or the mounting shaft 15.

  In the above embodiment, the attachment shaft for attaching the elastic member 37 is provided on the zoom ring 15. However, when the zoom ring 15 rotates, it moves together with the zoom ring 15. For example, the zoom ring 15 may be provided on a separate member.

  In the above embodiment, the zoom ring 15 that can be rotated with respect to the camera body 1 has been described as an example of an operation member that can move with respect to the apparatus body to which the present invention is applied. The present invention can also be applied to a movable operation member.

  In the above embodiment, an example of the operation member that can move in two directions from the neutral position has been described. However, the present invention can be applied to an operation member that can move only in one direction from the initial position. For example, in the state shown in FIG. 5A, one of the side walls of the fan-shaped through hole 19m is in contact with the elastic member 37 so that the zoom ring 15 can be rotated only in either the P direction or the Q direction. It may be the configuration.

  In the above embodiment, the example in which the present invention is applied to the zoom ring used for the zoom magnification changing operation in the camera has been described. You may apply. For example, in a playback mode in which one of a plurality of images recorded on a recording medium is displayed on the image display unit, the present invention may be applied to an operation member that performs an image feed operation for changing the image to be displayed to the next image. Absent.

  Further, since the present invention can also be applied to an operation member used for an operation of a function that can be executed by an electronic device other than the imaging device, such as the image feeding operation described above, an electronic device having an operation member movable relative to the device body If so, the present invention can be applied.

1 Camera Body 3 Front Cover Unit 15 Zoom Ring 19 Front Inner 27 Return Spring 37 Elastic Member

Claims (8)

An operation member movable from an initial position with respect to the device body;
A spring member that urges the operation member to be in the initial position;
Elasticity that is sandwiched between the pair of arm portions of the spring member when the position of the operation member is the initial position, and that contacts at least one of the pair of arm portions of the spring member when the operation member is moved. Members,
An attachment shaft that moves integrally with the operation member when the operation member moves;
The electronic device is characterized in that the elastic member has a cylindrical shape, and the mounting shaft is inserted into a hollow portion, and is held so as to be rotatable with respect to the mounting shaft.   The mounting shaft is provided with a first extending portion extending in a radial direction of the mounting shaft at a tip, and the mounting shaft includes the first extending portion in a radial section of the mounting shaft including the first extending portion. The electronic apparatus according to claim 1, wherein a length of the shaft in a radial direction is larger than a length of a hollow portion of the elastic member.   The electronic device according to claim 2, wherein the first extending portion has a shorter radial length of the mounting shaft as it is closer to a tip of the mounting shaft.   The elastic member is provided with a second extending portion that extends in a radial direction of the elastic member at an end opposite to a base side of the mounting shaft, and the second extending portion includes the second extending portion. The electronic device according to claim 2, wherein the electronic device extends in a radial direction of the elastic member from one extending portion.   5. The electronic device according to claim 1, wherein the elastic member has a frictional force with the mounting shaft smaller than a frictional force with the spring member.   The electronic device according to claim 5, wherein the elastic member has a diameter of the hollow portion larger than a diameter of the mounting shaft.   The electronic device according to claim 5, wherein the elastic member has a surface shape different between an inner peripheral surface and an outer peripheral surface. A limiting member for limiting movement of the operating member;
The electronic apparatus according to claim 1, wherein the elastic member is in contact with the restriction member before the operation member is in contact with the restriction member and movement is restricted.

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