JP4298038B2 - Optical equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a filter operating device used for an interchangeable lens barrel and a lens barrel to which the filter operating device is detachably attached.
[0002]
[Prior art]
Conventionally, as a filter operating device used for an optical device of an interchangeable lens barrel, a polarization filter is attached to an insertion type filter that is used by being inserted into a notch portion of an interchangeable lens barrel. There is one configured to rotate the filter itself by rotating the operation dial.
An example thereof is shown in FIGS. That is, the filter holder main body 1 is fitted into the outer periphery of the filter frame 3 so that the notch hole 1a into which the operation dial 2 is inserted, the screw hole 1b into which the screw portion 7b of the operation dial shaft 7 is screwed, and the filter frame 3 are rotatably fitted. A joint portion 1c is provided. The operation dial 2 is rotated by a user's hand from the outside, and a shaft portion having a gear portion 2a meshing with the gear portion 3a on the outer peripheral portion of the filter frame 3 and a screw portion 7b at the tip of the operation dial shaft 7. A hole 2b into which 7a is fitted and inserted is provided. In addition, a polarizing filter 4 is fixed to the filter frame 3 with a presser ring 5 to constitute a polarizing filter unit A. After the polarizing filter unit A is rotatably fitted to the filter holder body 1, C The mold washer 6 is held so as to perform only thrust regulation. Further, the filter holder main body 1 is inserted into the hole 8a of the fixing portion 8 of the lens barrel and attached.
In the filter operating device having the above-described configuration, the filter frame 3 is rotated by rotating the operation dial 2 from the outside of the lens barrel, and the rotation of the polarizing filter 4 can be adjusted.
[0003]
[Problems to be solved by the invention]
By the way, in the structure of the above-mentioned conventional example, since the notch hole 1a into which the operation dial 2 is inserted is provided in the filter holder main body 1, when raining, water will invade from this notch hole 1a. There was a problem.
[0004]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems of the prior art, and it is an object of the present invention to provide a filter operating device and a lens barrel that can be provided with drip-proof properties even if the polarization filter can be rotated and adjusted by an external operation. .
[0005]
[Means for Solving the Problems]
In order to achieve the above-described object, the present invention provides a rotation transmitting member that has a rotatable optical element inside an apparatus main body, and that rotates the optical element in a recess having a partition wall that is blocked from the inside at an outer peripheral portion. Is supported.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention relates to a filter operating device that can be attached to and detached from a lens barrel, wherein a filter unit provided inside the device main body can be rotated by an operation from outside the device main body. A partition wall is provided to block the outside and the inside of the partition wall, a rotation transmission member for transmitting a rotational force by an external operation is disposed on the outer periphery of the partition wall, and the filter unit is disposed on the inner periphery of the partition wall. The transmission member and the filter unit are coupled so as to be able to transmit rotation by a gear train provided with at least one shaft having a shaft penetrating the partition wall, so that even when it rains, the rotation transmission member and the filter unit Water can easily flow into the inner circumference. Further, according to the present invention, the partition wall has a recess, and the rotation transmission member is disposed in the recess, and penetrates from the inside of the recess to the outer peripheral portion of the apparatus main body on the optical axis side of the rotation transmission member. When the rain falls, the hole of the recess allows water to be drained without accumulating water in the recess, so that water caused by capillary action from the shaft portion of the rotation transmission member can be removed. Can be prevented.
[0007]
【Example】
An embodiment of the present invention will be described below with reference to FIGS.
1 is an exploded perspective view of a main part of the filter operating device according to the present embodiment, FIG. 2 is a plan view thereof, and FIG. 3 is an XX in FIG. 2 in a state where the filter operating device is mounted on a lens barrel as an optical apparatus. It is line sectional drawing.
In the figure, reference numeral 11 denotes an annular filter holder main body, which is provided with a recess 11a into which an operation dial 12 to be described later is inserted on its outer peripheral portion, and a filter frame 13 to be described later is rotatably fitted in the annular portion. A fitting portion 11b is provided. Further, on the recess 11a side of the filter holder main body 11, a hole 11c into which an operation dial shaft 17 described later is press-fitted, a hole 11d into which a shaft portion 18b of a connection gear 18 described later is fitted, and a screw 20 described later are tightened. Screw holes 11e and holes 11f penetrating from the recess 11a to the outer peripheral side of the filter holder body 11 are provided on the optical axis side of the holes 11c and 11d.
[0008]
Reference numeral 12 denotes an operation dial that is rotated by a human hand from the outside. The operation dial 12 is provided with a gear portion 12a that meshes with the first gear portion 18a of the connecting gear 18 and a shaft hole 12b into which the operation dial shaft 17 is fitted and inserted. Yes. A filter frame 13 is provided on the outer periphery thereof with a gear portion 13a that meshes with the second gear portion 18c of the connecting gear 18 and transmits the rotation from the operation dial 12. A polarizing filter 14 is an optical element, and is fixed to the filter frame 13 by a presser ring 15. Reference numeral 16 denotes a C-type washer, which performs only thrust regulation after a polarizing filter unit A constituted by a filter frame 13 to which the polarizing filter 14 is fixed is rotatably fitted to the filter holder main body 11.
[0009]
Reference numeral 17 denotes an operation dial shaft which is inserted into a hole 11c provided in the filter holder main body 11 and a fitting hole 12b provided in the operation dial 12, and rotatably supports the operation dial 12. Reference numeral 18 denotes a connecting gear, which is provided with a first gear b portion 18 a that meshes with the gear portion 12 a provided on the operation dial 12 and a second gear portion 18 c that meshes with the gear portion 13 a of the filter frame 13. The connecting gear 18 is rotatable in a first shaft portion 18b that is rotatably fitted in a fitting hole 11d provided in the filter holder main body 11 and a hole 19a provided in a presser plate 19 described later. A second shaft portion 18d for fitting is provided. Reference numeral 19 denotes a presser plate, which is provided with a hole 19a into which the second shaft portion 18d of the connecting gear 18 is fitted and a hole 19b into which the screw 20 is inserted, and is fixed to the filter holder main body 11 by the screw 20. The thrust of the connecting gear 18 is regulated. Reference numeral 21 denotes a fixing portion of a lens barrel to which the filter holder main body 11 is mounted, and is provided with a hole 21a into which the filter holder main body 11 is inserted.
[0010]
In the present embodiment having the above-described configuration, the operation dial 12 is rotated from the outside of the lens barrel, whereby the gear portion 12a provided on the operation dial 12, the first gear portion 18a provided on the connecting gear 18, and the first gear portion 18a. The filter frame 13 rotates via the two gear portions 18 c and the gear portion 13 a provided on the filter frame 13, and the rotation adjustment of the polarization filter 14 becomes possible.
Even if rainwater flows into the recess 11a from between the operation dial 12 and the inner wall of the recess 11a of the filter holder main body 11, it does not easily enter the filter frame 13 side. Moreover, since the hole 11f which penetrates the outer peripheral part of the filter holder main body 11 is provided in this recessed part 11a, the water which accumulates in this recessed part 11a can be drained rapidly.
[0011]
【The invention's effect】
As described above, according to the present invention, the filter operating device is detachable from the lens barrel, and the filter unit provided inside the device main body can be rotated by an operation from the outside of the device main body. In the filter operation device, a partition wall is provided that blocks the outside and the inside of the device main body, a rotation transmission member that transmits a rotational force by an operation from the outside is disposed on the outer peripheral portion of the partition wall, and the inner periphery of the partition wall A filter unit is disposed, and the rotation transmission member and the filter unit are coupled so as to transmit rotation by a gear train provided with at least one shaft passing through the partition wall. In addition, it is possible to prevent water from easily flowing from the rotation transmitting member to the inner peripheral side of the apparatus main body. Further, in the present invention, the partition wall has a recess, and the rotation transmission member is disposed in the recess, and penetrates from the inside of the recess to the outer peripheral portion of the apparatus main body on the optical axis side with respect to the rotation center of the rotation transmission member. When the rain falls, the hole of the recess allows water to be drained without accumulating water in the recess, so that water caused by capillary action from the shaft portion of the rotation transmission member can be removed. Can be prevented.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a filter operating device for an optical apparatus according to an embodiment of the present invention.
FIG. 2 is a plan view thereof.
3 is a cross-sectional view taken along the line XX of FIG. 2 in a state where it is mounted on a lens barrel as an optical apparatus.
FIG. 4 is an exploded perspective view of a filter operation device for a conventional optical apparatus.
FIG. 5 is a plan view thereof.
6 is a cross-sectional view taken along the line XX of FIG. 5 in a state where the lens barrel is mounted as an optical device.
[Explanation of symbols]
11 .. Filter holder main body, 11 a.. Recess, 11 f.・ Operation dial shaft, 18 ・ ・ Connection gear, 19 ・ ・ Presser plate, 20 ・ ・ Bis, 21 ・ ・ Fixing part of lens barrel, A ・ ・ Filter unit.

Claims (3)

In the filter operation device that can be attached to and detached from the lens barrel and that can rotate the filter unit provided inside the device main body by an operation from the outside of the device main body.
A partition wall that blocks the outside and the inside of the device body, and has a recess on the outside side ;
A rotation transmitting member disposed in the recess of the partition wall and transmitting a rotational force generated by an external operation ;
The filter unit disposed inside the partition wall and having a gear portion ;
A coupling gear that is disposed inside the partition wall and transmits the rotation of the rotation transmission member to the gear portion of the filter unit;
The connection gear has a shaft portion that penetrates a hole provided in the recess of the partition;
The filter operating device, wherein the shaft portion is parallel to an optical axis of the lens barrel .   The rotation transmitting member is disposed in the recess, and a hole penetrating from the inside of the recess to the outer peripheral portion of the device main body is provided on the optical axis side of the rotation center of the rotation transmitting member. Item 2. The filter operating device according to Item 1.   A lens barrel, wherein the filter operating device according to claim 1 is detachably mounted.

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