JP2000227535A - Lens barrel with tripod base - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens barrel that can be fixed to an arbitrary position regardless of a click and enable quick changes between a vertical or a horizontal layout. SOLUTION: A 1st tripod base rotational barrel 11 is provided with a click ball 15 and a click spring 16 held in a hole 12A of an end surface of the lens main body 17, inserted into the lens main body 17, the click ball 15 is pushed into a V shaped groove 17A by a click spring 16 and a click is generated by the rotation of the 1st tripod base rotational barrel 11. The rotation of the 1st tripod base rotational barrel 11 is fixed by having a 1st tripod base rotational barrel fixing screw 12 screwed into and held on the 1st tripod base rotational barrel. The rotation of a 2nd tripod base rotational barrel 13 is fixed by having a 2nd tripod base rotational barrel fixing screw 14 screwed into and held on the 1st tripod base rotational barrel 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens barrel having a tripod seat, and more particularly, to a lens barrel having a tripod seat that can rotate and slide and can be fixed at an arbitrary position.

[0002]

2. Description of the Related Art Conventionally, many super-telephoto interchangeable lenses have a built-in or attached tripod seat for attaching a tripod separately from a camera body. The tripod mount is configured to protrude from a rotatable ring around the optical axis on the external appearance of the lens barrel, and the ring is provided with a lock mechanism for fixing rotation, and the optical axis is mounted on the tripod. It can be rotated around the center and fixed at the horizontal position, vertical position or arbitrary position of the camera body, and clicks or indicators are printed or stamped at the horizontal position and vertical position, and the photographer can use the clicks or indicators as a guide It was fixed in position and photographed.

[0003]

However, the tripod set at the time of photographing is not always intended for the intended subject.
The composition is not necessarily horizontal or an arbitrary composition, and the photographer makes fine adjustments with the lens barrel. In particular, fine adjustment near the click is difficult due to the centripetal action of the click groove, and the same can be said for changing the horizontal and vertical composition after setting.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a lens barrel which can be fixed to an arbitrary position regardless of a click and can change the horizontal and vertical compositions quickly. Aim.

[0005]

In order to solve the above-mentioned problems, the present invention solves the above-mentioned problems by dividing the rotary cylinder of the tripod seat into one with a click and one without a click.

That is, in a lens barrel having a tripod seat that can rotate and slide and can be fixed at an arbitrary position, a first tripod seat rotary cylinder and a second fixing means that can rotate by tightening and loosening the first fixing means. The problem has been solved by providing a second tripod-seat rotating cylinder that can be rotated by tightening and loosening, and providing a click means on either one of the first tripod-seat rotating cylinder and the second tripod-seat rotating cylinder.

[0007]

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

FIG. 1 is a sectional view of a lens barrel showing an embodiment of the present invention. Reference numeral 11 denotes a first tripod seat rotary cylinder, 13 denotes a second tripod seat rotary cylinder, and 18 denotes a tripod seat having a tripod screw 19. The first tripod seat rotary cylinder 11 has a hole 12A provided on an end face of a cylinder rotatable about the optical axis of the lens body 17.
Then, the click ball 15 and the click spring 16 are inserted and held so as to be sandwiched by the lens body 17, and the click spring 15 pushes the click ball 15 into the V-grooves 17A provided in the lens body 17 in the horizontal position and the vertical position. , The first
A click is generated by the rotation of the tripod seat rotary cylinder 11.

The tripod seat 18 is attached to a second tripod seat rotary cylinder 13 rotatable around the optical axis around the outer periphery of the first tripod seat rotary cylinder 11, and a tripod screw 19 from the second tripod seat rotary cylinder 13.
The mounting portion of the tripod having a projection protrudes. Then, the second tripod seat rotating cylinder 13 to which the tripod seat 18 is attached and the first
The tripod seat rotary cylinder 11 is sandwiched and held by the lens body 17.

The first tripod seat rotary cylinder fixing screw 12 is
By screwing into and holding the tripod seat rotating cylinder 11 so as to intersect with the optical axis and screwing it, the lens body 17 is grounded, and the rotation of the first tripod seat rotating cylinder 11 is fixed.

The second tripod seat rotary barrel fixing screw 14 is provided with the first
The first tripod seat rotary cylinder 11 is grounded by being screwed into the tripod seat rotary cylinder 11 so as to intersect with the optical axis and screwed in, and the rotation of the second tripod seat rotary cylinder 13 is fixed.

Next, the operation in such a configuration will be described. The first tripod seat rotary barrel fixing screw 12 and the second
The first tripod seat rotation cylinder 11 can be rotated about the optical axis by loosening the second tripod seat rotation cylinder fixing screw 14 in the fixed lens body 17 by screwing in both the tripod seat rotation cylinder fixing screws 14. Becomes At this time, the lens body 17 is fixed to the first tripod seat rotation tube 11 by the first tripod seat rotation tube fixing screw 12, and slides together with the first tripod seat rotation tube 11, and slides at any position. Second tripod seat rotary cylinder fixing screw 1
4 is fixed by tightening. When the fixed position is set to the horizontal (vertical) of photographing and the state is changed to the vertical (horizontal) in that state, only the lens body 17 is centered on the optical axis by loosening the first tripod seat rotation barrel fixing screw 12. Can be rotated to the next click, it becomes vertical (horizontal) by rotating until the next click,
It is fixed by tightening the first tripod seat rotation cylinder fixing screw 12.

The position at which the click is generated is determined from the end surfaces of the first tripod-seat rotary cylinder 11 and the lens body 17 to the tripod seat 18 and the second
It is also possible to replace it with the tripod seat rotary cylinder 13, which will be described with reference to FIG.

FIG. 2 is a sectional view of a lens barrel showing another embodiment of the present invention. Reference numeral 21 denotes a first tripod seat rotary cylinder, 23 denotes a second tripod seat rotary cylinder, and 28 denotes a tripod seat having a tripod screw 29. The second tripod seat rotary cylinder 23 is inserted and held in a hole 22A provided in a direction intersecting the optical axis of the lens body 27 so that the click ball 25 and the click spring 26 are sandwiched by the tripod seat 28, and is held by the first tripod. Lateral position on the seat rotating cylinder 21,
The click ball 25 is pushed by the click spring 26 into the V groove 27A provided in the vertical position, and the second tripod seat rotary cylinder 2
The rotation of 3 causes a click.

The tripod seat 28 is attached to a second tripod seat rotation tube 23 rotatable around the optical axis around the outer periphery of the first tripod seat rotation tube 21.
The mounting portion of the tripod having a projection protrudes. Then, the second rotating body 23 of the tripod having the tripod seat 28 and the rotating barrel 21 of the first tripod seat 21 are sandwiched and held by the lens body 27.

The first tripod seat rotary cylinder fixing screw 22 is
It is screwed into the tripod seat rotary cylinder 21 so as to intersect the optical axis, held and screwed to ground the lens body 27 to fix the rotation.

The second tripod seat rotary cylinder fixing screw 24 is provided with the first
The first tripod-seat rotating cylinder 21 is grounded and fixed to the first tripod-seat rotating cylinder 21 by screwing it into the tripod-seat rotating cylinder 21 so as to intersect with the optical axis, and screwing the screw.

Next, the operation in such a configuration will be described. The second tripod seat rotary cylinder fixing screw 24 and the first
The second tripod seat rotation cylinder 23 can be rotated about the optical axis by loosening the first tripod seat rotation cylinder fixing screw 22 in the fixed lens body 27 by screwing in both the tripod seat rotation cylinder fixing screws 22. Becomes At this time, the lens body 27 is fixed to the second tripod seat rotation tube 23 by the second tripod seat rotation tube fixing screw 24, and rotates and slides together with the third tripod seat rotation tube 23. First tripod seat rotary cylinder fixing screw 2
It is fixed by tightening 2. When the fixed position is set to be horizontal (vertical) for photographing, and is changed to vertical (horizontal) in that state, only the lens body 27 is centered on the optical axis by loosening the second tripod seat rotation barrel fixing screw 24. Can be rotated to the next click, it becomes vertical (horizontal) by rotating until the next click,
It is fixed by tightening the second tripod seat rotation cylinder fixing screw 24.

[0019]

As described above, according to the structure of the present invention, there is provided a lens barrel which can be fixed to an arbitrary photographing position without being influenced by a click and can change the horizontal and vertical photographing positions instantly. realizable.

[Brief description of the drawings]

FIG. 1 is a sectional view of a lens barrel showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a lens barrel showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 1st tripod seat rotation tube 12 1st tripod seat rotation tube fixing screw 13 2nd tripod seat rotation tube 14 2nd tripod seat rotation tube fixing screw 17 Lens body 18 Tripod seat 21 1st tripod seat rotation tube 22 1st tripod seat Rotating tube fixing screw 23 Second tripod seat rotating tube 24 Second tripod seat rotating tube fixing screw 27 Lens body 28 Tripod seat

Claims (1)

[Claims] 1. A lens barrel having a tripod seat that can rotate and slide and can be fixed at an arbitrary position, wherein a first tripod seat rotation tube rotatable by tightening and loosening of a first fixing means, and a second fixing means. And a second tripod seat rotary cylinder rotatable by tightening and loosening of the first and second tripod seat rotary cylinders, and a click means provided on one of the first tripod seat rotary cylinder and the second tripod seat rotary cylinder. Lens barrel