JP2012037693A - Interchangeable lens system attachable to antitheft member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an interchangeable lens system made to be antitheft without increasing the size thereof.SOLUTION: An interchangeable lens system of the present invention includes a non-detachable tripod 40. The tripod has a rotation stopper part 50 including operation members 61, 64 and a mechanism for preventing rotation of the tripod with respect to a lens barrel of the interchangeable lens system caused by a rotation operation of the operation members. A lock attachment part 62 to which an antitheft member can be attached is provided inside the operation members in the rotation stopper part 50.

Description

The present invention relates to an interchangeable lens device, and more particularly to an interchangeable lens device to which an antitheft member can be attached.

In stores and exhibitions, there are many cases where an interchangeable lens device is displayed so that a user can take it. In such a case, it is necessary to prevent the interchangeable lens device from being stolen.

  As a general anti-theft measure for exhibits, a method of attaching a security wire or using a lock to the exhibits is well known. Patent Document 1 discloses a camera antitheft device using a security wire. Patent Document 2 discloses a method for suppressing theft by restricting the normal operation of the camera with a password.

Japanese Patent Laid-Open No. 11-134565 Japanese Patent Laid-Open No. 03-051834

However, in the anti-theft device disclosed in Patent Document 1, it is necessary to fix a large box-shaped member (support base) for mounting a security wire to the camera. When a similar member is fixed to the interchangeable lens, The interchangeable lens device is increased in size.

  Moreover, when the method disclosed in Patent Document 2 is applied to an interchangeable lens device, theft of the interchangeable lens device can be suppressed, but the theft cannot be reliably prevented.

  The present invention provides an interchangeable lens device capable of preventing theft without enlarging the interchangeable lens device.

An interchangeable lens device according to one aspect of the present invention includes a non-detachable tripod seat. The tripod mount has a rotation stopper portion including an operation member and a mechanism for preventing rotation of the tripod seat relative to the lens barrel of the interchangeable lens device when the operation member is rotated. And the lock mounting part which can mount | wear with an antitheft member is provided inside the operation member in the rotation stopper part, It is characterized by the above-mentioned.

  According to the present invention, since the lock mounting portion is provided on the inner side of the operation member in the rotation stopper portion also provided in the conventional tripod seat, it is possible to prevent theft without increasing the size of the interchangeable lens device. it can.

The disassembled perspective view of the tripod knob part of the interchangeable lens apparatus which is an Example of this invention. Sectional drawing which shows the interchangeable lens apparatus and digital single-lens reflex camera of an Example. The enlarged view of the (A) part in FIG. The top view of the tripod knob part in an Example. The figure explaining how to mount / remove the anti-theft member on the tripod knob in the embodiment.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 2 shows an interchangeable lens apparatus that is an embodiment of the present invention and a digital single-lens reflex camera to which the interchangeable lens apparatus is attached and detached.

  Reference numeral 1 denotes a digital single-lens reflex camera (hereinafter simply referred to as a camera). An interchangeable lens device 2 is detachably attached to the camera 1.

  In the camera 1, reference numeral 3 denotes a main mirror that selectively guides the light beam from the interchangeable lens device 2 to the finder optical system 7 and the image sensor 6, and is constituted by a half mirror. As shown in the figure, the light beam reflected by the main mirror 3 disposed in the optical path is guided to the user's eye through the finder optical system 7 and the eyepiece optical system 8 to enable observation of the subject image. Further, the light beam transmitted through the main mirror 3 is reflected by the sub mirror 4 and guided to the focus detection unit 5.

  At the time of photographing, the main mirror 3 and the sub mirror 4 are retracted out of the optical path. For this reason, the light flux from the interchangeable lens device 2 forms a subject image on the image sensor 6. The image sensor 6 is composed of a CCD sensor or a CMOS sensor, and photoelectrically converts a subject image. Image data is generated from an output signal from the image sensor 6 and is recorded on a recording medium or displayed on the rear display 9.

  The interchangeable lens device 2 includes a photographing optical system that includes a plurality of lenses such as a first lens unit L1, a variable power lens (not shown), a focus lens, and an anti-vibration lens, and a diaphragm.

  Hereinafter, the configuration of the lens barrel will be described. An outer ring 21 is attached to the outer periphery of the fixed cylinder 22. A mount 27 attached to the camera 1 is fixed to the rear ends of the fixed cylinder 22 and the outer ring 21. An intermediate cylinder 23 is coupled to the front end of the fixed cylinder 22.

  The intermediate cylinder 23 includes a focus holding unit 24 that holds a focus drive unit (not shown) that moves the focus lens in the optical axis direction during autofocusing and manual focusing, an aperture holding unit that holds an aperture, and the like.

  Reference numeral 25 denotes a first group barrel that holds the first group lens L 1, and is coupled to the front end portion of the intermediate cylinder 23. A focus ring 32 is rotatably disposed on the outer periphery of the intermediate cylinder 23. By rotating the focus ring 32, the focus lens can be moved in the optical axis direction via the focus drive unit, and manual focus can be performed.

  A tripod ring 41 is attached to the outer periphery of the outer ring 21. A tripod leg 42 is attached to the tripod ring 41. The tripod ring 41 is held so as to be rotatable around the optical axis by a plurality of bearings with respect to the outer ring 21. The tripod ring 41 includes a roller 43 that is inserted into or removed from a groove (not shown) formed in the outer ring 21 at intervals of 90 ° in the circumferential direction, and a bias that biases the roller 43 toward the outer ring 21. And a member (not shown). When the user rotates the tripod ring 41 with respect to the lens barrel, the roller 43 fits into the groove portion of the outer ring 21 to generate a click feeling. Therefore, the user recognizes the rotation of the tripod ring 41 every 90 °. be able to.

  The tripod seat ring 41 is provided with a rotation stopper portion 50. The rotation stopper portion 50 brakes the rotation of the tripod ring 41 with respect to the outer ring 21 according to the rotation operation of the operation member that can be rotated by the user, and the rotation of the operation member. And a mechanism for preventing rotation. The rotation stopper unit 50 will be described in more detail later.

  The tripod foot 42 includes a screw fastening portion 44 that is fixed to a tripod (not shown) and a rubber portion 45 that is easy for the user to carry.

  The tripod seat ring 41, the rotation stopper 50 and the tripod foot 42 constitute a non-detachable tripod seat 40. The non-detachable means that the user is not detached from the interchangeable lens device unless it is intentionally disassembled, and is always used as an integral unit with the interchangeable lens device. On the other hand, the detachable tripod mount means one that can be attached to or detached from the interchangeable lens device with a simple operation by the user.

  Next, the configuration of the rotation stopper portion 50 in the tripod seat 40 will be described in detail with reference to FIGS. 1, 3, and 4. FIG. 1 shows an exploded view of the portion (A) in FIG. 2, and FIG. 3 shows a cross section of the same portion. FIG. 4 is a plan view of the same part. In the following description, the side toward the radially outer side of the barrel in the rotation stopper 50 is referred to as the upper side, and the direction toward the radially inner side is referred to as the lower side.

  The rotation stopper portion 50 includes a knob subunit 60, a knob seat 51, a knob ring retaining shaft screw 52, a knob wheel 53, a knob cover 54, and a knob seat fixing screw 55.

  The knob subunit 60 covers a knob shaft 61 that is a rotatable member that can rotate about the axis (O) shown in FIG. 3 and an upper end opening of a cylindrical space 61b formed on the knob shaft 61. The knob plate 62 is disposed, and a screw 63 that fixes the knob plate 62 to the knob shaft 61 is provided. Furthermore, the knob subunit 60 is integrally formed on the outer periphery of the knob shaft 61 with respect to the knob shaft 61 by insert molding, and has an operation ring 64 that is held by a user for rotating. The operation ring 64 and the knob shaft 61 rotate integrally around the axis (O). The operation ring 64 and the knob shaft 61 constitute an operation member.

  A male screw portion 61 a is formed around the axis (O) in the lower portion of the knob shaft 61. The knob seat 51 is formed with a female screw portion that is screwed into the male screw portion 61a. The knob seat 51 is fixed to the tripod ring 41 by a knob seat fixing screw 55. For this reason, when the operation ring 64 and the knob shaft 61 are rotated, the knob subunit 60 is in the radial direction of the tripod ring 41 and the outer ring 21 with respect to the knob seat 51 (that is, the tripod ring 41). Move in the direction.

  A knob ring 53 is rotatably attached to the knob shaft 61 by a knob ring retaining shaft screw 52 at a lower end portion of the knob shaft 61 (an end portion on the tripod ring 41 and the exterior ring 21 side). When the knob subunit 60 is moved downward by the rotation of the operation ring 64 and the knob shaft 61, the knob ring 53 is pressed against the outer peripheral surface of the exterior ring 21, and the rotation of the tripod ring 41 around the exterior ring 21 is braked. The rotation is prevented.

  In the present embodiment, a male screw portion 61a that requires high strength, a space portion 61b into which a key member to be described later is inserted, or the knob shaft 61 to which the knob plate 62 is fixed is made of a highly rigid metal material. Form. On the other hand, the operation ring 64 touched by the user is formed of an elastic or flexible material such as a plastic material or a rubber material so that a good operational feeling can be obtained.

  As shown in FIG. 4, an elongated hole portion 62 a connected to the space portion 61 b in the knob shaft 61 is formed in the center portion of the knob plate 62 through which the shaft (O) passes. As shown in FIG. 5A, a key member 71 of a lock portion 70 provided at one end of a security wire 75 that is a theft prevention member can be inserted into the hole portion 62. In this embodiment, a Kensington lock is configured.

  The key member 71 is inserted through the hole 62 to the space 61 b in the knob shaft 61. Then, as shown in FIG. 5B, when the key member 71 inserted up to the space portion 61b is rotated 90 ° around the axis (O), the key member 71 engages with the knob plate 62 and the hole portion. It will not come out of 62. Thereby, the lock part 70 of the security wire 75 is attached to the knob plate 62 (that is, the rotation stopper part 50). Thus, the knob plate 62 constitutes a lock mounting portion on which the antitheft member is mounted inside the operation member in the rotation stopper portion 50. If the key member 71 is rotated from the state of FIG. 5B to the state of FIG. 5A, the lock portion 70 of the security wire 75 can be removed from the rotation stopper portion 50.

  In this embodiment, after the knob plate 62 is fixed to the knob shaft 61 and the screw 63 is fixed, the operation ring 64 is insert-molded on the outer periphery of the knob shaft 61 so as to cover the knob plate 62 and the screw 63. . For this reason, a hole 64 a connected to the hole 62 a is formed in a portion of the operation ring 64 that covers the knob plate 62. In this manner, the knob plate 62 is prevented from being removed from the knob shaft 61 by being formed so as to cover the knob plate 62 and the screw 63 by the operation ring 64.

  The knob cover 54 includes a cover portion 54a that covers the upper surface of the operation ring 64 when the lock portion 70 of the security wire 75 is not attached to the rotation stopper portion 50, and a leg portion 54b that extends from the cover portion 54a. The cover part 54 a has a convex part 54 d that can be fitted into the hole part 64 a of the operation ring 64. The hole 64a of the operation ring 64 is formed to be slightly larger than the hole 62a of the knob plate 62, and the tip of the convex portion 54d inserted into the hole 64a is the peripheral portion of the hole 62a of the knob plate 62. Further insertion is prevented.

  The leg portion 54 b has a retaining portion 54 c at the tip, and is inserted into a knob cover attachment hole 60 a formed in the knob subunit 60, thereby attaching the knob cover 54 to the knob subunit 60. The retaining part 54c has a play in the direction in which the leg part 54b extends, and when the lock part 70 of the security wire 75 is attached to the rotation stopper part 50, the cover part 54a can be opened to a position that does not get in the way. it can.

  According to the present embodiment, the knob plate 62 is provided as a lock mounting portion on which the antitheft member can be mounted inside the operation members (61, 64) of the rotation stopper portion 50 also provided in the conventional tripod seat. Therefore, the theft can be prevented without increasing the size of the interchangeable lens device 2. In other words, a high antitheft effect can be obtained without adding a large member for mounting the antitheft member.

  Note that the mounting method of the anti-theft member is not limited to Kensington lock, and other mounting methods may be used. For example, a method may be used in which a through hole is formed in the rotation stopper 50 and a wire or a lock is inserted into the through hole.

  The place where the through hole is provided is not limited to the knob shape of the tripod seat, but may be provided on a tripod ring or a tripod leg.

  Each embodiment described above is only a representative example, and various modifications and changes can be made to each embodiment in carrying out the present invention.

A compact interchangeable lens device that can prevent theft can be provided.

40 Tripod seat 50 Rotation lock part 61 Knob shaft 64 Operation ring 61b Space part 62 Knob plate 70 Lock member

Claims (2)

An interchangeable lens device having a non-detachable tripod seat,
The tripod seat has a rotation stopper portion including an operation member and a mechanism for preventing the tripod seat from rotating with respect to the lens barrel of the interchangeable lens device by rotating the operation member.
An interchangeable lens device, wherein a lock mounting portion to which an antitheft member can be mounted is provided inside the operation member in the rotation stopper portion. The lock mounting portion is configured using a member having a hole portion that is arranged so as to cover an opening of a space formed inside the operation member and leads to the space,
The interchangeable lens device according to claim 1, wherein the anti-theft member is attached to the lock attaching portion by being inserted into the space through the hole.