JPH11218799A - Polarizing filter rotating tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust a polarizing filter while a lens shade is mounted by rotating a wheel while pressing it against the outer peripheral surface of the polarizing filter and then making it possible to rotate the polarizing filter. SOLUTION: The tool consists of an arm part 10 which is made rotatable by a hinge 9, etc., on the base end of a bearing part 8 holding the wheel 7 rotatably and a fixed base 11 provided to an end part of the arm part 10, and the fixed base 10 is fitted in the lens mount part of the lens shade. While a screw 13 for adapter mounting is fitted to the lens mount part, a guide groove 12 formed cutting the flank of the fixed base 11 is fitted onto the screw 13 to fix the fixed base 11 with the screw 13. Then the wheel 7 is rotated while pressed against the outer peripheral surface of the polarizing filter, which is enabled to rotate. Thus, the polarizing filter rotating tool is constituted, so the polarizing filter can easily be adjusted while the lens shade is mounted.

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polarizing filter rotating tool which enables a polarizing filter to be operated without removing a lens shade while a lens shade is attached to a lens barrel of a camera or the like. .

2. Description of the Related Art Heretofore, various filters have been attached to the front end portion of a lens barrel for photographing and the like, and a lens shade has been used to cut off harmful light from the surroundings.

However, if a polarizing filter is used in such a case, it is possible to rotate the polarizing filter and adjust it with the lens shade hindering the lens shade. Did not. Therefore, the present invention is intended to solve the above-mentioned problem, and it is possible to adjust the polarizing filter even when the lens shade is mounted, so that the polarizing filter can be operated without removing the lens shade, and the shutter An object of the present invention is to provide a polarizing filter rotating tool that can take a photograph without missing a chance.

That is, a polarizing filter rotating tool according to the present invention comprises: a through hole provided in an outer cylinder of a joint portion of a lens shade with a lens; a wheel rotatably provided in a holding member; A polarizing filter provided inside the lens shade and attached to the lens barrel, wherein the polarizing filter is rotatable by rotating the wheel in a state of being pressed against the outer peripheral surface of the polarizing filter. Is what you do. Further, the polarizing filter rotating tool of the present invention is characterized in that the holding member is freely bendable so as to hold the wheel with respect to the through hole so as to be able to advance and retreat. Since the polarizing filter rotating device of the present invention is configured as described above, the polarizing filter can be easily adjusted even with the lens shade mounted.
In addition, since the polarizing filter rotating tool of the present invention has a simple configuration, it is easy to assemble and assemble, and is less likely to break down. Further, since the outer periphery of the wheel is made of rubber, it has excellent contact characteristics with the outer peripheral surface of the polarizing filter, and is moderately flexible so that the outer peripheral surface of the filter is not damaged.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of a polarizing filter rotating tool according to the present invention will be described in detail with reference to the drawings. In FIG. 1, a bellows-type lens shade 2 is mounted on a lens barrel 1 having a polarizing filter mounted on a front end, and a polarizing filter rotating tool 3 of the present invention is further mounted. That is, the lens shade 2
A through hole 6 is provided in the outer periphery of the lens mounting portion 5 at the rear end, and a part of the wheel 7 of the polarizing filter rotating tool 3 rotatably mounted on the lens mounting portion 5 advances and retreats from the through hole 6. Provided possible. The polarizing filter rotating tool 3 attached to the lens mounting section 5 has the structure shown in FIGS. That is, the wheel 7
8 for rotatably holding the arm, an arm 10 rotatably provided at the base end of the bearing 8 with a hinge 9 or the like, and an arm 10
And a fixed base 11 provided at an end of the fixed base 1
1 is fitted into the lens mounting portion 5 of the lens shade 2. At this time, the guide groove 12 cut out on the side surface of the fixing base 11 may be fitted into the screw 13 and fixed with the screw 13 while the screw 13 for mounting the adapter is still attached to the lens mounting portion 5. 14 is a retaining piece formed by bending both ends of the guide groove 12 provided on the side surface of the fixed base 11 downward. As described above, the bearing portion 8 and the arm portion 10 are rotatably connected to each other by the hinge 9 or the like, as shown in FIG.
The reason is that a gelatin filter can be attached to the device. In this case, since the polarizing filter 4 is not normally used, the wheel 7 which is in contact with the outer peripheral surface of the polarizing filter 4 at the time of use is rotated by the hinge 9 or the like as shown in FIG. You just have to move and jump up. It is desirable that the through hole 6 for the wheel 7 provided on the outer periphery of the lens mounting portion 5 is provided to be shifted in the axial direction with respect to the slit-shaped groove 14. An elastic body such as wear-resistant rubber is suitably mounted on the outer periphery of the metal or plastic wheel 7 so that the coefficient of friction with the outer peripheral surface of the polarizing filter 4 is increased. The diameter of the wheel 7 is preferably about 25 mm or less. The polarizing filter rotating tool 3 configured as described above is fixed to the lens mounting portion 5 of the lens shade 2 in a state where the wheel 7 floats up from the outer peripheral surface of the polarizing filter 4 and is not in contact therewith. When using the polarizing filter rotating tool 3 of the present invention, the wheel 7 is pushed in the direction of the center line of the lens barrel with a finger from the normal state in which the wheel 7 is lifted up from the outer peripheral surface of the polarizing filter 4, and as shown in FIG. What is necessary is just to press and rotate the outer peripheral surface of the polarizing filter 4 and rotate it. Since the polarizing filter 4 is rotated by friction between the two, if the finger is released from the wheel 7 at a desired position, the positioning of the polarizing filter 4 is performed very accurately. In the case of the lens shade 12 for each lens, a slit-shaped through hole 6 is provided around the right shoulder of the lens shade 12 as shown in FIG.
The polarizing filter rotating tool 3 is attached at a position where it contacts the outer peripheral surface of the polarizing filter 4 inside. In this case, since the bearing portion 8 and the arm portion 10 do not need to be able to be bent freely, connection by a hinge or the like is unnecessary.

The polarizing filter rotating tool of the present invention is constructed as described above, so that the polarizing filter can be easily adjusted even with the lens shade mounted. In addition, since the polarizing filter rotating tool of the present invention has a simple configuration, it is easy to assemble and assemble, and is less likely to break down. Further, since the outer periphery of the wheel is made of rubber, it has excellent contact characteristics with the outer peripheral surface of the polarizing filter, and is moderately flexible so that the outer peripheral surface of the filter is not damaged.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a polarizing filter rotating tool of the present invention, showing a state in which the polarizing filter rotating tool is attached to a bellows-type shade.

FIG. 2 is a perspective view of a polarizing filter rotating tool.

FIG. 3 is a perspective view of the other side of the polarizing filter rotating tool.

FIG. 4 is a schematic view of a lens mounting unit to which a polarizing filter rotating tool is attached.

FIG. 5 is an explanatory diagram of a state in which a wheel is in contact with a polarizing filter in FIG. 1;

FIG. 6 is an explanatory diagram of a state where a wheel is flipped up in FIG. 1;

FIG. 7 is a perspective view showing a state in which a polarizing filter rotating tool is attached to a lens shade for each lens.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 lens barrel 2 bellows type lens shade 3 polarizing filter rotating tool 4 polarizing filter 5 lens mounting part 6 slit 7 wheel 8 bearing part 9 hinge 10 arm part 11 fixing base 12 guide groove 13 screw 14 retaining piece 15 slit-shaped groove

Claims (2)

[Claims] 1. A through-hole provided in an outer cylinder of a joint of a lens shade and a lens, a wheel rotatably provided in a holding member, and a wheel inside the lens shade and attached to a lens barrel. A polarizing filter rotating tool comprising: a polarizing filter; and rotating the wheel while pressing the wheel against the outer peripheral surface of the polarizing filter, whereby the polarizing filter is rotatable. 2. The polarizing filter rotating tool according to claim 1, wherein a holding member is freely bendable so as to hold the wheel forward and backward with respect to the through hole.