JP2000241869A - Electronic camera apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent dust from sticking to the surface of an imaging device when attachable/detachable interchangeable lens unit and interchangeable finder unit are detached. SOLUTION: The device is provided with mounts 16 and 33 arranged on the camera main body 10 and engaged with mounts 16 arranged on the attachable/detachable interchangeable lens unit 20 or the interchangeable finder unit 30 and having each opening part, and a structure member for the camera main body 12 with the imaging device and a quick return mirror arranged in the internal cavity and provided with an opening part on the optical path of an image made incident through a photographic lens 21. In this case, the device is provided with transparent covers 15 and 17 arranged on the opening parts of the mounts 16 and 33 so as to keep the internal cavity of the structure body in an airtight state when the interchangeable lens unit 20 or the interchangeable finder unit 30 is detached.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic camera device in which a lens and a finder are interchangeable.

[0002]

2. Description of the Related Art An electronic camera device that captures an image using an image sensor is different from a camera device that captures an image using a film. However, since light does not enter the pixel portion to which dust adheres, a defect occurs in the image data, and the image obtained thereafter remains defective. Further, in general, an image pickup device has a significantly smaller image pickup surface than a film, so that the influence of dust, dust and the like attached to the image pickup surface becomes relatively larger.

For this reason, in an interchangeable lens or viewfinder interchangeable electronic camera device in which the image pickup device may be exposed to the outside air, care must be taken to prevent dust and the like from adhering to the image pickup device at the time of replacement. However, it was not possible to completely prevent adhesion of dust and the like.

[0004]

As described above, in the electronic camera apparatus of the interchangeable lens type or the viewfinder exchange type, dust adheres to the optical system or the image pickup element when the lens is exchanged, and the attached dust causes image data to be lost. There was a problem that a defect occurred.

An object of the present invention is to provide an electronic camera device that suppresses dust from adhering to an image pickup device or an optical system when a lens unit or a finder unit is removed, and suppresses a decrease in image quality of a captured image. To provide.

[0006]

Means for Solving the Problems The present invention is configured as follows to achieve the above object.

(1) The present invention (claim 1) provides an electronic camera device in which at least one of a lens unit including a photographing lens and a finder unit including an eyepiece is detachable from the camera body. ,
The detachable lens unit or the finder unit is mounted, a mount having an opening on an optical path of an image incident from the photographing lens, an image sensor and a quick return mirror are arranged in an internal space, and an opening of the mount is provided. An opening is provided at a corresponding position, a structure forming the camera body, and an opening of the mount or an opening of the structure is provided at the opening of the structure, and the structure of the structure is removed when the lens unit or the finder unit is removed. And a transparent cover for maintaining the airtightness of the internal space. In the present invention (claim 1), the transparent cover is preferably a concave lens.

(2) According to the present invention (claim 3), in an electronic camera device in which a lens unit including a photographing lens is detachable from the camera body, the lens unit is provided on the camera body and holds the detachable lens unit. A body mount having an opening, an image sensor and a quick return mirror disposed in an internal space, and a structure having an opening on an optical path of an image incident from the photographing lens, and the body when the lens unit is mounted. A dust intrusion prevention shutter that opens an opening of the mount or the structure and closes the opening of the body mount or the structure when the lens unit is removed.

[0009]

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

[First Embodiment] FIGS. 1 and 2 are schematic diagrams showing an electronic camera device, an interchangeable lens unit and a finder unit according to a first embodiment of the present invention. 1 shows a state in which the interchangeable lens unit 20 and the interchangeable finder unit 30 are mounted on the camera body 10, and FIG. 2 shows a state in which the interchangeable lens unit 20 and the interchangeable finder unit 30 are detached from the camera body 10. I have.

As shown in FIG. 1, a detachable interchangeable lens unit 20 is mounted on a camera body 10. The camera body 10 and the interchangeable lens unit 20 have a detachable structure by a body mount 16 provided on the camera body 10 and a lens mount 23 provided on the interchangeable lens unit 20.

An exchangeable finder unit 30 is attached to the camera body 10. Camera body 1
0 and the exchangeable finder unit 30 are configured to be detachable by a finder mount 33 provided on the exchangeable finder unit 30.

The camera body exterior member 12 of the camera body 10
A mirror box structural member 11 is provided therein. In a space surrounded by the mirror box structural member 11, a quick return mirror 13 that rotates about a rotation center 13a is installed. At the time of viewfinder observation, light that has entered the camera body 10 from the taking lens 21 of the interchangeable lens unit 20 supported by the lens frame 22 via the taking lens unit transparent cover 17 is reflected by the quick return mirror 13. The light reflected by the quick return mirror 13 is transmitted to the finder section transparent cover 15 supported by the mirror box structural member 11 and the focusing screen 40.
The light enters the eyepiece 32 via the penta roof prism 31, and the user can see the object by looking through the eyepiece 32.

In photographing an object, the quick return mirror 13 rotates about the center of rotation 13a in conjunction with the pressing of a release button (not shown), thereby entering the camera body 10 from the photographing lens 21. The captured light is incident on the image sensor 14 to perform imaging.

The finder section transparent cover 15 and the photographing lens section transparent cover 17 are installed so as to shield an opening provided in the mirror box structural member 11 at an area where an image is incident, and include an image pickup device 14 and a quick return mirror 13. The space containing is a closed structure.

Next, a description will be given of when the lens unit and the finder unit are replaced. Interchangeable lens unit 20
When the replacement finder unit 30 is detached from the camera body 10, the quick return mirror 13 and the imaging device 14 are arranged in an enclosed space surrounded by the mirror box structure member 11, the finder transparent cover 15, and the photographing lens transparent cover 17. Have been.

Therefore, when the units 20 and 30 are removed, the image sensor 14 does not come into contact with the outside air at all, so that no dust adheres to the surface of the image sensor 14.
It is possible to suppress the deterioration of the image quality due to the appearance of dust in the image. Even if dust adheres to the photographing lens unit transparent cover 17, the image quality is hardly affected because the dust is sufficiently separated from the imaging surface of the image sensor.

As shown in FIG. 3, the transparent cover may be constituted by a concave lens 56 instead of a flat plate. By using the concave lens 56, it is possible to secure a space by keeping the image forming surface of the image away from the interchangeable lens unit 20. It will be easier.
Further, it is easy to dispose the transparent cover directly on the imaging surface of the imaging element 13.

[Second Embodiment] FIGS. 4 and 5 are views showing the schematic arrangements of an electronic camera and an interchangeable lens unit according to a second embodiment of the present invention. 4A and 5A are cross-sectional views in a direction parallel to the axis of light incident on the camera, and FIGS. 4B and 5B are views with respect to the optical axis. It is sectional drawing of the orthogonal direction. 4 shows a state in which the interchangeable lens unit 20 is mounted on the camera body 60, and FIG. 5 shows a state in which the interchangeable lens unit 20 is detached from the camera body. 4 and 5, the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals, and detailed description thereof will be omitted.

Two dust intrusion prevention shutters 63 and 64 (not shown in FIG. 4A) that can shield the opening of the mount 16 are mounted on the body mount 16.
Is provided. Dust intrusion prevention shutters 63 and 64
The projection 24 provided on the lens mount 23 of the interchangeable lens unit 20 when the interchangeable lens unit is mounted.
The projections 63b and 64b provided on the dust intrusion prevention shutters 63 and 64 are engaged with each other, so that the dust intrusion prevention shutter 6 around the rotation centers 63a and 63a.
3, 64 are opened, and it becomes possible to take a picture.

Also, when attaching and detaching the interchangeable lens unit 20,
Projection 24 and projections 63b, 64b of shutters 63, 64
The shutters 63 and 64 are released.
The opening of the body mount 16 is closed by closing the dust intrusion prevention shutters 63 and 64 around the rotation centers 63a and 64a by the elasticity of the tension springs connected to the arms 63c and 64c.

Therefore, in this embodiment, when the interchangeable lens unit 20 is mounted, the dust intrusion prevention shutters 63, 6 are provided.
When the interchangeable lens unit 20 is detached, the opening of the body mount 16 is closed by closing the dust intrusion prevention shutters 63 and 64 when the interchangeable lens unit 20 is attached and detached. Can be prevented from adhering.

In the present embodiment, when the finder unit is configured as a detachable replacement finder unit as in the first embodiment, a transparent cover may be provided at the opening thereof as in the first embodiment. .

The present invention is not limited to the above embodiment, but can be implemented with various modifications without departing from the spirit of the invention.

[0025]

As described above, according to the present invention, even when the lens unit or the finder unit is removed, the airtightness of the space including the imaging device can be maintained, so that the imaging device comes into contact with the outside air when the lens or the finder is removed. As a result, dust and the like do not adhere to the surface of the image sensor, so that the quality of a captured image can be improved.

[Brief description of the drawings]

FIG. 1 is a view showing a schematic configuration of an electronic camera device according to a first embodiment.

FIG. 2 is a diagram showing a schematic configuration of an electronic camera device according to the first embodiment.

FIG. 3 is a diagram showing a schematic configuration of an electronic camera device according to the first embodiment.

FIG. 4 is a diagram showing a schematic configuration of an electronic camera device according to a second embodiment.

FIG. 5 is a diagram showing a schematic configuration of an electronic camera device according to a second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Camera main body 11 ... Mirror box structural member 12 ... Camera main body exterior member 13 ... Quick return mirror 14 ... Image sensor 15 ... Finder part transparent cover 16 ... Body mount 17 ... Photographing lens part transparent cover 20 ... Interchangeable lens unit 21 ... Photographing Lens 22 Lens frame 23 Lens mount 24 Projection 30 Replacement finder unit 31 Penta roof prism 32 Eyepiece 33 Finder mount 40 Focusing screen 54 Filter 55 Focal play shutter 56 Concave lens 60 Camera body 63 64: dust intrusion prevention shutter 63a, 64a: rotation center 63b, 64b: projection 63c, 64c: arm

Claims (3)

[Claims] 1. An electronic camera device in which at least one of a lens unit including a photographing lens and a finder unit including an eyepiece is detachable from a camera body, wherein the detachable lens unit or the finder unit is provided on the camera body. Is mounted, a mount having an opening on an optical path of an image incident from the taking lens, an image sensor and a quick return mirror are arranged in an internal space, and an opening is provided at a position corresponding to the opening of the mount. A structure that forms the camera body; and a transparent cover that is provided in the opening of the mount or the opening of the structure, and that keeps the internal space of the structure airtight when the lens unit or the finder unit is removed. An electronic camera device comprising: 2. The electronic camera device according to claim 1, wherein said transparent cover is a concave lens. 3. An electronic camera device in which a lens unit including a photographing lens is detachable from a camera body, a body mount provided on the camera body, holding the detachable lens unit, and having an opening, and an internal space. An image sensor and a quick return mirror are arranged, a structure having an opening on an optical path of an image incident from the photographing lens, and opening the body mount or the opening of the structure when the lens unit is mounted, And an electronic camera device comprising: a dust intrusion prevention shutter for closing an opening of the body mount or the structure when removing the lens unit.