JP2009204689A - Collapsible camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable dust-proofing for an image sensor and to decrease the thickness of a camera body in a collapsible mount state in a collapsible camera. <P>SOLUTION: The collapsible camera includes a lens barrel 2, which is collapsed in the camera body 1 in the non-photographing state and delivered from the camera body 1 in the photographing state. The camera includes a frame member 8 for holding an optical filter 7 disposed between a section of lenses 21, 22, 23, 24, 25 in the lens barrel 2 and the image sensor 6 in the camera body and movable in the optical axis direction, and a cylindrical member 11 disposed between a board 5 loaded with the image sensor 6 and the frame member 8 and formed to surround the image sensor 6 by compression deformable elastomer. When the lens barrel 2 is collapsed, the frame member 8 is pressed by the lens barrel 2 to compression deform the cylindrical member 11. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a collapsible camera in which a camera barrel is retracted in a camera body when not photographing.

In a digital camera, dust is attached to an optical filter, specifically an infrared cut filter, disposed between the lens unit and the image sensor at the manufacturing stage, particularly the coating stage, or after being incorporated into the camera body. May adhere. In order to prevent the attached dust from appearing in the image, the optical filter needs to be separated from the imaging surface of the imaging device to some extent.
However, if the optical filter is separated from the imaging surface of the image sensor to some extent as described above, the retractable camera has a disadvantage that the camera body thickness at the time of retracting is increased.

In order to solve this inconvenience, there is one in which the holding frame of the optical filter is movable in the optical axis direction (see Patent Document 1). That is, in Patent Document 1, a low-pass filter is fixed to a movable frame, the periphery of the image sensor is surrounded by a fixed frame, and the movable frame is movably attached to the fixed frame. An image pickup mechanism is disclosed in which the low-pass filter is positioned near the image pickup element at the time of non-image pickup.
JP 2006-217186 A

  However, in the configuration disclosed in Patent Document 1, an elastic body that urges the movable frame support plate forward is provided between the pair of arms protruding outward from the movable frame support plate and the fixed frame support plate. Therefore, a large mounting space is required and the dustproof effect is insufficient.

  SUMMARY OF THE INVENTION An object of the present invention is to enable dust-proofing of an image sensor unit and to reduce a camera body thickness in a retracted state in a retractable camera.

  In order to solve the above-described problems, the invention according to claim 1 is a retractable camera including a lens barrel that is retracted into the camera body at the time of non-photographing and is drawn out from the camera body at the time of photographing. A frame member that holds an optical filter disposed between the lens unit and the image pickup device in the camera body, is movable in the optical axis direction, and is disposed between the substrate on which the image pickup device is mounted and the frame member. And a cylindrical member formed so as to surround the image pickup element by an elastic body that is arranged and can be compressed and deformed.

  A second aspect of the present invention is the retractable camera according to the first aspect, wherein when the lens barrel is retracted, the frame member is pressed by the lens barrel and the cylindrical member is compressed and deformed. It is characterized by that.

  According to the present invention, it is possible to protect the image pickup element portion from dust and to reduce the camera body thickness in the retracted state.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
(Embodiment)
1 and 2 show the appearance of an embodiment of a retractable camera to which the present invention is applied. Reference numeral 1 denotes a camera body, 2 denotes a lens barrel, 3 denotes a power button, and 4 denotes a shutter button.

  When the camera function is stopped by operating the power button 3, the lens barrel 2 is retracted into the camera body 1 and the power button 3 is operated as shown in FIG. Then, as shown in FIG. 2, the lens barrel 2 is drawn out from the camera body 1 by a drive mechanism in which a motor (not shown) built in the camera body 1 is operated to incorporate a reduction gear, a worm screw, and the like.

  3 to 6 show the built-in components of the camera body 1 and the lens barrel 2. Reference numeral 5 denotes a substrate, 6 denotes an image sensor, 7 denotes an optical filter, 8 denotes a movable frame member, 9 denotes a fixed frame member, 11 Is a cylindrical member, 21, 22, 23, 24, and 25 are movable lenses, and 26 is a final lens barrel.

  A substrate 5, an image sensor 6, an optical filter 7, a movable frame member 8, a fixed frame member 9, and a cylindrical member 11 are incorporated in the camera body 1. In addition, movable lenses 21, 22, 23, 24, and 25 are incorporated in the lens barrel 2.

  Specifically, inside the camera body 1, for example, an image sensor 6 by CCD mounted on the substrate 5, an infrared cut filter 7 as an optical filter in front of the image sensor 6, a movable frame member 8 as a holding frame thereof, A fixed frame member 9 as the guide frame is arranged. The movable frame member 8 is movable in the front-rear direction inside the fixed frame member 9 and is assembled so as not to be detached from the front.

A cylindrical member 11 formed of an elastic body such as a stretchable rubber is disposed between the substrate 5 and the movable frame member 9 so as to surround the imaging element 6.
A plurality of protrusions 27 that are in contact with the front surface of the movable frame member 8 are formed on the rear surface of the final lens barrel 26 of the lens barrel 2.

  As described above, according to the retractable camera of the embodiment, since the cylindrical member 11 disposed between the substrate 5 and the movable frame member 9 surrounds the image sensor 6, the image sensor 6 portion can be dust-proof. In addition, the mounting space can be made compact because it is only necessary to provide the cylindrical member 11 surrounding the image sensor 6.

  When the camera button is stopped by operating the power button 3, the plurality of protrusions provided on the rear surface of the final lens barrel 26 of the lens barrel 2 are used as shown in FIGS. When the portion 27 pushes the movable frame member 8, the cylindrical member 11 between the substrate 5 and the movable frame member 9 is compressed and deformed, and the lens barrel 2 is retracted into the camera body 1. Accordingly, since the retractable amount of the lens barrel 2 can be increased by the amount of compressive deformation of the cylindrical member 11, the body thickness of the camera body 1 in the retracted state can be reduced.

  Further, when the power button 3 is operated to set the photographing preparation state, as shown in FIG. 4, the lens barrel 2 is drawn out from the camera body 1 and the movable frame member 8 is compressed and deformed into the cylindrical member 11. Is pushed forward to prevent the fixed frame member 9 from being pulled forward.

(Modification)
In addition, in the above embodiment, although it was set as the square frame member and the cylindrical member, this invention is not limited to this, A circular frame member and a cylindrical member may be sufficient.
In the embodiment, the projection is provided on the frame member. However, the cylindrical member may be directly pressed by the frame member without providing the projection.
Furthermore, it is needless to say that other specific detailed structures can be appropriately changed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing the configuration of an embodiment of a retractable camera to which the present invention is applied and showing the appearance in a non-photographing state. Similarly, it is the perspective view which showed the external appearance of a photography possible state. It is the vertical side view which showed the relationship between the lens part in a retracted state, an image pick-up element, an optical filter, and its frame member. It is the vertical side view which showed the relationship between the lens part in an extended state, an image pick-up element, an optical filter, and its frame member. FIG. 4 is a perspective view showing a final lens barrel, an optical filter holding frame, and a substrate in the retracted state of FIG. 3. FIG. 6 is an exploded perspective view of the components shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Camera body 2 Lens barrel 3 Power button 4 Shutter button 5 Board | substrate 6 Image pick-up element 7 Optical filter 8 Movable frame member 9 Fixed frame member 11 Cylindrical member 21,22,23,24,25 Movable lens 26 Final lens frame 27 protrusion

Claims (2)

In a retractable camera equipped with a lens barrel that is retracted into the camera body during non-photographing and is drawn out from the camera body during photographing,
A frame member movable in the optical axis direction, holding an optical filter disposed between a lens portion in the lens barrel and an image sensor in the camera body;
A collapsible type comprising: a cylindrical member disposed between the substrate on which the image sensor is mounted and the frame member, and formed to surround the image sensor with an elastic body capable of compressive deformation. camera.   2. The retractable camera according to claim 1, wherein when the lens barrel is retracted, the frame member is pressed by the lens barrel and the cylindrical member is compressed and deformed. 3.

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