JP3563249B2 - Camera barrel dustproof cover device - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a dust-proof cover device for a lens barrel of a camera having a built-in CCD image pickup device.
[0002]
[Prior art]
In the CCD camera, a CCD image pickup device is arranged at a focal position of an internal lens system, and a lens barrel having a lens is mounted. The lens barrel is provided with a focus ring and an aperture adjustment ring.
When such a CCD camera is used in a production factory, it is necessary to protect the lens and the adjustment ring from dust, foreign matter intrusion, and damage due to contact by a cover that covers the entire lens barrel.
[0003]
[Problems to be solved by the invention]
However, such a CCD camera with a lens barrel cover has the inconvenience of having to remove the lens barrel cover each time the aperture adjustment ring or the focus ring is operated and set during imaging.
In addition, the aperture adjustment ring must be set accurately according to the subject in order to perform image processing of the image data, but there is also a problem in setting the aperture precisely. This is because the interval between the position holding angles of the aperture adjusting ring by the conventional click mechanism is as coarse as about 10 ° and cannot be set and held at an arbitrary angle.
[0004] An object of the present invention is to provide a lens-barrel dust-proof cover device in which an adjustment ring can be operated and a set position can be held without removing the camera from a camera.
[0005]
[Means for Solving the Problems]
One invention of the present application is a dustproof cover device that is mounted on a camera and that covers a lens barrel provided with an adjustment ring that can be rotated around its periphery, comprising a cylindrical lens barrel cover, the lens barrel cover, and a camera. a cylindrical barrel cover holding member formed is fixed to the camera to couple the door, and a barrel adjusting ring operating mechanism, a lens barrel adjustment ring operating mechanism, times a cylindrical barrel cover holding member rotatably to have fitted on the operation-ring, said adjusting ring with the rotation of the operating ring is configured so as to be rotated. Another aspect of the present invention is further the lens barrel adjustment ring operating mechanism, before has a Kimisao work ring, a relay ring that is loosely fitted in the inner circumferential cylindrical surface of the barrel cover holding member, the a relay ring and the adjustment ring is configured to be coupled. In another aspect of the present invention, the lens barrel adjusting ring operating mechanism includes an adjusting ring play preventing mechanism having a holding pin. In another aspect of the present invention, the adjusting ring is a throttle adjusting ring, and the relay ring and the throttle adjusting ring are connected to each other. In another aspect of the present invention, the adjustment ring is a focus ring, and the relay ring and the focus ring are connected to each other.
[0006]
[Action]
By rotating the operation ring of the lens barrel adjustment ring operating mechanism with the lens barrel dust cover attached, the transmission pin and relay ring are sequentially linked to operate the lens barrel adjustment ring.
The aperture adjustment ring is held at the set angular position by the holding pin of the adjustment ring play prevention mechanism.
[0007]
【Example】
Embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, reference numeral 1 denotes a CCD camera body having a rectangular parallelepiped case, and a CCD image pickup device E is disposed at a focal position of an internal lens system. The camera body is held on the mount by known means.
A lens barrel 2 is mounted on the camera body, and the lens barrel 2 includes a focus ring 21 and an aperture adjustment ring 22.
The dustproof cover device 3 is disposed so as to cover the entire lens barrel 2. The dustproof cover device 3 includes a cylindrical lens barrel cover 31, a cylindrical lens barrel cover holding member 4, and an adjustment ring operating mechanism. The lens barrel cover 31 has a protective glass 32 at the front end, and a female screw 33 is engraved on the inside of the other end. The lens barrel cover holding member 4 is fixedly joined to the camera body 1 by screws (not shown).
[0008]
An operation ring 5 for operating the aperture adjustment ring 22 from outside is rotatably fitted to the lens barrel cover holding member 4. Reference numeral 50 denotes a relay ring which is fitted around the aperture adjusting ring 22 and is loosely fitted to the inner peripheral cylindrical surface of the cover holding member 4, 51 is a cylindrical outer peripheral surface of the relay ring, and 53 is an end surface of the relay ring 51. The cutout 54 is a set screw for connecting the aperture adjustment ring 22 and the relay ring 50 to rotate integrally.
FIG. 2 is a sectional view taken along line AA of FIG. 1, and a mechanism 6 for preventing the aperture adjustment ring 22 from floating is fixed to the lens barrel cover holding member 4.
Reference numeral 61 denotes a holding pin made of a resin material having a flat head, which is loosely fitted in a hole penetrating the lens barrel cover holding member 4. When the holding pin 61 is pressed against the cylindrical outer peripheral surface 52 of the relay ring, the rotation of the relay ring 51 is restricted. 62 is a holding screw, 63 is a knob, 64 is a lock nut, 65 is a retaining ring 65 and 66 for the holding screw, a screw holder, and 67 is a mounting screw for mounting the screw holder to the cover holding member 4. is there.
[0009]
FIG. 3 is an exploded arrangement view for explaining the adjusting ring operating mechanism. The connection between the relay ring 50 and the aperture adjusting ring 22 is maintained by the set screw 54 disposed on the relay ring 50.
A long hole or notch 42 is provided in the peripheral surface of the lens barrel cover holding member 4, and a male screw 43 is engraved on the other end. The male screw 43 is screwed with the female screw 33 of the lens barrel cover. Since the operation hole 5 is combined with the long hole 42 and sealed, dust and foreign matter do not enter the inside of the lens barrel dustproof cover device.
A transmission pin 52 is screwed to the operation ring 5, and the transmission pin 52 rotatably passes through an elongated hole on the peripheral surface of the holding member 4, and a distal end portion 52 a of the transmission pin is A plurality of notches 53 formed at equal intervals on the end face are engaged with one place.
[0010]
To change the setting of the aperture adjusting ring 22, first, the lock nut 64 and the holding screw 62 are loosened, and the relay ring 50 is released from the restraining of the holding pin. Then, the operation ring 5 is turned to operate the transmission pin 52 and the relay ring 50 sequentially to operate the aperture adjustment ring 22 of the lens barrel. When the operation is completed, the holding screw 62 may be tightened back, the holding pin 61 may be pressed, and the lock nut 64 may be tightened as it is. The changed position of the adjustment ring 22 is thereby retained.
[0011]
Note that, apart from the present embodiment, a plurality of adjusting ring operating mechanisms may be provided in parallel to operate and set the aperture adjusting ring and the focus ring, respectively.
[0012]
【The invention's effect】
It is possible to operate and set the lens barrel adjusting ring from outside without removing the dustproof cover device arranged over the lens barrel of the camera. Therefore, the best imaging result can be obtained by operating the CCD camera regardless of the factory environment such as dust.
[Brief description of the drawings]
1 is a sectional view of a main part of the present invention; FIG. 2 is a sectional view taken along line AA in FIG. 1; FIG. 3 is an exploded view of an adjusting ring operating mechanism;
DESCRIPTION OF SYMBOLS 1 CCD camera body 2 Lens barrel 22 Aperture adjustment ring 3 Dustproof cover device 4 Lens barrel cover holding member 5 Adjustment ring

Claims (5)

A dustproof cover device mounted on the camera and covering a lens barrel provided with an adjustment ring that can be rotated on the outer periphery ,
A cylindrical lens barrel cover,
A cylindrical barrel cover holding member formed is fixed to the camera so as to couple the lens barrel cover and the camera,
And a barrel adjusting ring operating mechanism,
Barrel adjusting ring operating mechanism includes a pivotally fitted on the operation-ring in a cylindrical barrel cover holding member, wherein the adjusting ring is rotated in conjunction with rotation of the operating ring barrel dust cover device for a camera, characterized in that the the like. The lens barrel adjustment ring operation mechanism,
And before Kimisao operation ring,
2. The camera according to claim 1, further comprising a relay ring loosely fitted on an inner peripheral cylindrical surface in the lens barrel cover holding member, wherein the relay ring and the adjustment ring are connected. 3. Barrel dustproof cover device. 3. The lens barrel dustproof cover device according to claim 1, wherein the lens barrel adjusting ring operating mechanism includes an adjusting ring play preventing mechanism having a holding pin. The lens barrel dustproof cover device according to claim 2, wherein the adjustment ring is an aperture adjustment ring, and the relay ring and the aperture adjustment ring are connected. The lens barrel dust-proof cover device according to claim 2, wherein the adjustment ring is a focus ring, and the relay ring and the focus ring are connected to each other .

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