JP2009145580A - Image pickup apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the size of a bayonet attaching/detaching mechanism and the number of components, and to ground with an external metal component. <P>SOLUTION: The image pickup apparatus has a mount provided with the bayonet mechanism, on which apparatus option accessories such as a wide converter and tele-converter are mounted by their being rotated relative to the main body of the apparatus. In the image pickup apparatus, the locking member 17 of the bayonet mechanism is provided with a part 17a with which the external metal component 6 is disposed in contact. Accordingly, grounding with the external metal component 6 is established. The locking member of a conventional bayonet mechanism and a grounding member are integrated, thereby reducing the size and the number of the components. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an imaging apparatus having a mount on which the apparatus option accessory is mounted by rotating the apparatus option accessory with respect to the apparatus main body.

  In a digital still camera (analog camera), it is known that a lens adapter option is attached to the front end of the lens or the main body side via a bayonet mechanism, and wide angle shooting and telephoto shooting are enjoyed with a wide converter and a teleconverter. In recent years, it is necessary to reduce the size of the bayonet mechanism and reduce the number of parts by reducing the size and cost of the camera. In addition, there is a digital still camera that uses metal for the exterior to give a high-class feel to the digital still camera.

  As a technology of the bayonet mechanism, for example, there is Patent Literature 1. The technology provides a camera having a mount portion that allows an adapter barrel to be easily and accurately mounted on the front surface of a taking lens so that the aesthetics of the camera are not impaired when the adapter barrel is not mounted. To do.

Moreover, there exists patent document 2. FIG. The technology includes a bayonet mount and a mount ring, and when the mount ring is rotated to the position for attaching / detaching the interchangeable lens, the click position is intuitively recognized so that the lens can be quickly recognized. It is possible to exchange.
JP 2000-330179 A JP 2000-352753 A

  However, Japanese Patent Laid-Open No. 2000-330179 is to provide a camera having a mount portion that can easily and accurately mount an adapter barrel on the front surface of a photographing lens, and does not mount an adapter barrel. Sometimes, it is disclosed that the appearance of the camera is not impaired, but the grounding structure of the appearance metal parts around the lens barrel is not disclosed with the lock member.

  Japanese Patent Application Laid-Open No. 2000-352753 can intuitively recognize the rotation position of the mount ring when attaching / detaching the interchangeable lens to / from the camera body, and allows quick lens replacement. Although providing an interchangeable lens mounting device is disclosed, as described above, the grounding structure of the external metal parts around the lens barrel is not disclosed with the lock member.

  A conventional product embodiment will be described with reference to the drawings.

  FIG. 2 is an external perspective view of the camera, FIG. 3 is a rear view of the bayonet cap, FIG. 4 is an exploded perspective view of the rear surface of a conventional camera option accessory attachment / detachment mechanism, and FIG. It is a disassembled perspective view of the surface of the attachment / detachment mechanism of a camera option accessory.

  A conventional earth structure with external parts and a bayonet attachment / detachment mechanism will be described.

  In FIG. 2, reference numeral 1 denotes a camera body, in which various members for enabling photographing are arranged.

  In FIG. 3, reference numeral 2 denotes a cap member that covers the mount of the camera body, and has a plurality of claw portions 2a that engage with the mount on the inner peripheral surface thereof.

  In FIG. 2, 3 is a front cover constituting the front side of the camera body, and 4 is a rear cover constituting the rear side of the camera body 1.

  The front cover 3 has a mount 3a for mounting a camera option accessory such as an interchangeable lens (not shown) or an adapter device. The mount 3a has a guide groove 3b into which the claw portion 2a of the cap member 2 can enter, and the guide groove 3b is arranged so as to be in the same phase as the claw portion 2a. An engaging groove 3c extending in the circumferential direction of the mount 3a is formed at one end of the guide groove 3b.

  In the above configuration, the claw portion 2a of the cap member 2 is fitted into the guide groove portion 3b of the front cover 3, and the cap member 2 is rotated around the optical axis (clockwise direction in FIG. 2) to thereby form the claw portion 2a and the engagement groove portion. By engaging 3c, the cap member 2 can be attached to the mount 3a of the camera body 1. A camera option accessory (not shown) can be attached to the camera mount 3 a in the same manner as the cap member 2.

  Inside the mount 3a of the front cover 3, a lens barrel portion 5 through which a subject light beam passes is formed. The subject luminous flux that has passed through the lens barrel 5 forms an image on an imaging medium (not shown) (an imaging element such as a film or a CCD) disposed in the camera body 1.

  A flash light emitting device 7 for irradiating illumination light toward the subject is disposed above the lens barrel 5 in front of the camera. In addition, a lens 8 as an illumination light source for irradiating illumination light for signaling a self-timer or the like is provided on the upper left side of the lens barrel 5 in front of the camera.

  When an imaging element is used as the imaging medium, a display medium such as a liquid crystal display device can be disposed on the back surface of the camera body 1, and a subject image captured by the imaging element is displayed on the display medium or captured. You can play back the displayed image.

  Reference numeral 9 denotes a zoom switching lever operated to change the focal length of the lens barrel 5, which is disposed so as to surround a shutter button (not shown) and is rotatable with respect to the shutter button.

  When the zoom switching lever 9 is rotated in one direction, the focal length of the lens barrel 5 is switched in the wide direction, and when it is rotated in the other direction, the focal length of the lens barrel 5 can be switched in the tele direction. is there.

  The shutter button (not shown) can be pressed in two stages. When the shutter button is pressed halfway, shooting preparation operations (photometry operation, distance measurement operation, etc.) are started, and when the shutter button is fully pressed, A photographing operation (exposure to an image sensor such as a film or a CCD) is started.

  Image data photographed by the image sensor can be displayed as a photographed image on a liquid crystal display device, or can be recorded on a storage medium such as various memory cards.

  Reference numeral 10 denotes a lid member that covers an opening of a recording medium storage chamber for storing a recording medium, and is attached to the camera body 1 so as to be rotatable. When the lid member 10 is rotated from the state shown in FIG. 2, the recording medium storage chamber can be opened, and in this state, the recording medium can be taken in and out of the recording medium storage chamber. Reference numeral 11 denotes a lid member that covers an opening of a battery storage chamber for storing a battery, and is attached to the camera body 1 so as to be rotatable. When the lid member 11 is rotated from the state shown in FIG. 2, the battery storage chamber can be opened, and in this state, the battery can be taken in and out of the battery storage chamber. Reference numeral 6 denotes an external metal part arranged around the lens barrel 5.

  Reference numeral 12 denotes a lock release button of an attaching / detaching mechanism for attaching / detaching the cap member and the camera option, and reference numeral 13 denotes a locking member for preventing the bayonet cap member from being detached from the mount portion 3a.

  4 and 5, reference numeral 14 denotes an elastic member, which is disposed around the 3d axis formed from the front cover 3. The bayonet holder member 15 is a member that holds the attachment / detachment mechanism. Reference numeral 16 denotes a grounding part of the appearance metal part 6.

  One end of the elastic member 14 abuts against the lock member 13 and the other end abuts against the bayonet holder member 15 so that the lock release button 12 abutting against the lock member 13 is locked in a direction to project from the front cover 3. The release button 12 is activated.

  The lock member 13 is substantially L-shaped and receives an urging force from the elastic member 14 so as to protrude from the camera mount 3a of the front cover 3 as shown in FIG. Further, the lock member 13 is in contact with the lock release button 12, and when the lock release button 12 is operated in the push-in direction with respect to the front cover 3, the lock member 13 also operates in the push-in direction. Conversely, when the lock member 13 receives a biasing force from the elastic member 14 and operates in a direction in which the lock member 13 protrudes from the front cover 3, the lock release button 12 also operates in the protrusion direction.

  In the configuration of the attachment / detachment mechanism described above, when the lock release button 12 is operated in the pushing direction with respect to the front cover 3 by the user's operation, the lock member 13 resists the urging force of the elastic member 14 against the front cover 3. It moves in the pushing direction and is housed in the camera body, and the bayonet cap 2 can be attached and detached.

  16, the abutting portion 16 a protrudes from the hole 3 e formed from the front cover 3, abuts on the external metal part 6, and is fastened to the front cover 3 together with the hold member 15 with screws. The hold member 15 is connected to a ground (not shown), and the appearance metal part 6 has a structure in contact with the ground part through the ground part 16 and the hold part 15. After assembling the external metal part 6 so as to cover the front cover 3, the grounding part 6 is assembled as described above.

  However, in the above-described conventional example, the ground component 16 is not fastened to the external metal component 6 with screws, so that it is not a reliable ground structure. Further, even if the appearance metal part 6 and the ground part 16 are in contact with the ground structure, the appearance metal part can be formed by forming an oxide film on the contact part of the appearance metal part 6 with the ground part 16 as time passes. 6 and the grounding part 16 cannot be connected, and a reliable grounding structure cannot be realized.

  The present invention has been made paying attention to the above problems, and the object thereof is to improve the grounding structure of the bayonet as an anti-static measure in an imaging apparatus such as a digital still camera. It is to provide a configuration that reduces the size of the bayonet mechanism and reduces the number of parts.

  In order to achieve the above object, the invention according to the present invention provides an image pickup apparatus having a mount to which the device option accessory is mounted by rotating the device option accessory with respect to the device body. It is characterized in that the grounding member of the external metal part that is arranged is integrated, and the contact portion between the integrated member and the external metal part is bent up.

  As described above, according to the present invention, the lock member and the ground member of the external metal part arranged around the lens barrel are integrated, and the shape of the contact portion between the integrated member and the external metal part is formed. By using the bent shape, the bayonet mechanism can be downsized, the number of parts can be reduced, and a reliable grounding structure can be provided. Thus, a low-priced and small camera can be provided.

  Next, details of the present invention will be described in accordance with the description of the embodiments.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  The grounding structure with the appearance metal part according to the present invention will be described.

  The description of the same part as the conventional structure is omitted.

  FIG. 1 is a cross-sectional view of the attachment / detachment mechanism according to the present invention, FIG. 6 is an exploded perspective view of the rear surface of the attachment / detachment mechanism of the camera option accessory according to the present invention, and FIG. 7 shows the camera option accessory according to the present invention. It is a disassembled perspective view of the surface of an attachment / detachment mechanism.

  In FIGS. 1, 6, and 7, reference numeral 14 denotes an elastic member, which is disposed around the axis of 3 d formed from the front cover 3. The elastic member 14 is locked in a direction in which the lock release button 12 in contact with the lock member 17 protrudes from the front cover 3 by contacting one end of the elastic member 14 with the lock member 17 and the other end with the bayonet holder member 15. The release button 12 is activated.

  The lock member 17 is substantially L-shaped, and receives an urging force from the elastic member 14 so that one end protrudes from the camera mount 3a of the front cover 3 as shown in FIG. The lock member 17 is always in contact with the lock release button 12 and operates integrally with the lock release button 12. Further, the lock member 17 has a contact portion 17 a with the external metal component 6, and the contact portion 17 a protrudes from the hole 3 f formed from the front cover 3 and contacts the external metal component 6. . The holding member 15 is connected to a ground (not shown), and the appearance metal part 6 has a structure for grounding through the contact part 17 a of the lock member 17, the elastic member 14 and the parts of the holding member 15. .

  In the configuration of the attachment / detachment mechanism described above, when the lock release button 12 is operated in the pushing direction with respect to the front cover 3 by the user's operation, the lock member 17 resists the urging force of the elastic member 14 against the front cover 3. It moves in the pushing direction and is housed in the camera body, and the bayonet cap 2 can be attached and detached.

  As described above, according to the present embodiment, the bayonet attaching / detaching mechanism is miniaturized by making the grounding structure of the external metal part 6 the conventional locking member 13 and the grounding member 16 into the integral locking member 17. And the number of parts can be reduced.

  In addition, since the lock member 17 is provided with the contact portion 17a with the external metal part 6, the contact member 17a is moved to the external metal part 6 by the operation of the lock member 17 as the operator presses the bayonet. The oxide film can be broken, resulting in a more reliable ground structure.

  Further, the contact portion 17a of the lock member 17 is not limited to the shape of the present embodiment, and may be in contact with the external metal part 6 with a sharp conical shape or the like.

Sectional drawing of the attachment / detachment mechanism which shows the Example of this invention A perspective view of a conventional digital still camera showing an embodiment of the present invention. The back view of the bayonet cap which shows the Example of the past and this invention The exploded perspective view of the back surface of the attachment / detachment mechanism of the camera option showing the conventional example The exploded perspective view of the surface of the attachment / detachment mechanism of the camera option showing the conventional example The disassembled perspective view of the back surface of the attachment / detachment mechanism of the camera option which shows the Example of this invention 1 is an exploded perspective view of the surface of a camera option attachment / detachment mechanism showing an embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Digital still camera 2 Cap member which covers mount of camera body 2a Plural claw parts engaged with mount 3 Front cover constituting front side of camera body 3a Mount of camera body 3b Claw part 2a of cap member 2 can enter Guide groove 3c engagement groove 3d extending in the circumferential direction of the mount 3a 3d shaft formed on the front cover 3e hole formed in the front cover 3 3f hole formed in the front cover 3 4 rear side of the camera body Constructed rear cover 5 Lens barrel 6 Appearance metal parts 7 Flash light emitting device 8 Illumination light for signaling self-timer 9 Zoom switching lever 10 Cover member for covering opening of battery storage chamber for storing battery 11 Storage for recording medium Cover member for covering the opening of the recording medium storage chamber 12 Bayonet lock release button 13 Conventional Lock member 14 Elastic member 15 Bayonet attachment / detachment mechanism holder 16 Ground member 16a Contact portion between ground member and appearance metal member 17 Lock member 17a Contact portion between lock member and appearance metal component

Claims (1)

By rotating the device option accessory with respect to the device body, the device option accessory is provided with a mount on which the device option accessory is mounted, and the device option accessory is prevented from being detached from the mount, and the device option accessory is removed. A locking member that is movable between a position to be enabled, a biasing member that biases the locking member in the direction of the protruding position, abuts on the locking member, and the locking member is moved by the user's operation. In an imaging device having an unlocking member that moves to the retracted position against the biasing force of the biasing member,
An appearance metal part is disposed around the lens barrel, and between the one end of the lock member that prevents the device option accessory from being detached from the mount and the unlocking member, and the lock member is the appearance metal part. An imaging device characterized by having a structure for grounding.

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