JP2000227537A - 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. SOLUTION: In a tripod base 1, a click pin 3 and a click spring 9 are held inserted into and held in an opening 1A on an edge part of a lens main body 8, the click pin 3 is pushed to a V shaped groove 8A by the click spring 9, and a click is generated by a single rotation of the tripod base 1. A linked switch plate 4 is inserted from an opening 1C on a side surface of the tripod base 1, is engaged to the click pin 3 and the position of a click pin 3 is determined by V grooves V1 and V2 on the side surface of the tripod base 1. The linked switch plate 4 and a switch cover 6 are fixed by a switch 5 and a small fixing screw 7 so that the linked switch plate 4 and the switch cover 6 are held inbetween. A tripod fixing screw 2 is screwed into and held to the tripod base 1 so as to cross the optical axis and is grounded to the lens main body 8 and the rotation is fixed by having it screwed in.

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, a super-telephoto interchangeable lens has a tripod seat for mounting a tripod separately from a camera body for mounting a tripod, or a tripod seat for mounting a tripod. There are many removable ones. Generally, these tripod seats are configured to protrude from a rotatable ring around the optical axis on the appearance of the lens barrel, and the ring is provided with a lock mechanism for fixing rotation. Then, with the interchangeable lens attached to a tripod, the interchangeable lens is rotated around the optical axis of the interchangeable lens, and fixed at a horizontal position, a vertical position, or an arbitrary position of the camera body. In addition, in order to determine the horizontal position and the vertical position, an index which is clicked, printed or stamped is provided, and the photographer fixes the position at an arbitrary position using the click or the index as a guide for photographing.

[0003]

However, the tripod set at the time of photographing does not always have a horizontal or arbitrary composition with respect to the subject intended by the photographer, and the photographer performs fine adjustment using the lens barrel. I was going. In particular, it is difficult to perform fine adjustment near the click defining the vertical position and the horizontal position due to the centering action by the click groove, and the same can be said when changing the composition of the horizontal position and the vertical position after setting.

The present invention has been made in view of the above-described problems, and has as its object to provide a lens barrel that can be fixed at an arbitrary position regardless of a click.

[0005]

In order to solve the above-mentioned problems, the present invention has solved the above-mentioned problems by arbitrarily switching the presence or absence of a click on a fixing ring of a tripod seat. That is, in a lens barrel having a tripod seat that can rotate and slide and can be fixed at an arbitrary position, a click mechanism that defines the rotation position of the tripod seat is provided, and click release means that releases the click mechanism is provided. Settled.

[0006]

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, FIG. 2 is an enlarged view of a click mechanism 20 shown in FIG. 1, and FIG. is there. In each drawing, the same members are indicated by the same numbers.

In FIG. 1, reference numeral 1 denotes a tripod seat having a tripod screw hole 10, and a mounting portion of the tripod protrudes from an outer periphery of a lens body 8 from a cylinder rotatable around an optical axis. The tripod seat 1 is sandwiched by the lens body 8 and is rotatably attached to the lens body 8 by tightening and loosening the tripod fixing screw 2.
When the tripod fixing screw 2 is loosened and the lens body 8 is rotated, the vertical and horizontal positions are defined by the click mechanism 20. The tripod fixing screw 2 is screwed into the tripod seat 1 so as to intersect with the optical axis, held and screwed into the ground of the lens body 8 to fix the tripod seat 1.

Here, the tripod seat 1 is provided with a click pin 3 and a click spring 9 in a gap 1A provided in an end surface of a cylinder rotatable around the optical axis of the lens body 8 shown in FIGS. It is inserted and held so as to be sandwiched by the main body 8. As a result, when the lens body 8 is rotated, the click pin 3 is pushed by the click spring 9 into the V-groove 8A that defines the horizontal position and the vertical position of the lens body 8, and the tripod seat 1 generates a click feeling by rotation. .

The interlocking switching plate 4 is inserted through an opening 1C provided on the side surface of the tripod seat 1, and is engaged with the click pin 3 and assembled. Then, the position of the click pin 3 is determined by V-grooves V1 and V2 provided on the side surface of the tripod seat 1. The changeover switch 5 and the fixing screw 7 are fixed so as to sandwich the interlocking changeover plate 4 and the switch cover 6. The switch cover 6 covers an opening 1C provided on a side surface of the tripod seat 1, and is fixed and held on the tripod seat 1 as an external component.

Next, the operation of the click mechanism in such a configuration will be described. In the lens body 8 to which the tripod fixing screw 2 is screwed and fixed, loosening the tripod fixing screw 2 allows the lens body 8 to rotate about the optical axis.

At this time, the changeover switch 5 is set to the lens body 8
"Clicked" at the front of the vehicle, that is, the click pin 3 engaged with the interlocking switching plate 4 fixed to the fixing screw 7 moves forward, and the projection 4A of the interlocking switching plate 4 falls into the V groove V1. The click pin 3 and the lens body 8 come into contact with each other. As a result, the click pin 3 pushed by the click spring 9 falls into the V-groove 8A of the lens body 8, so that a click feel is generated. And
By tightening the tripod fixing screw 2, the lens body 8
Is fixed.

On the other hand, when the changeover switch 5 is slid to the rear of the lens body 8, the click is released, and "no click" is selected. That is, the click pin 3 engaged with the interlock switching plate 4 fixed to the fixing screw 7 moves rearward, and the projection 4A of the interlock switching plate 4
It is fixed by dropping into the groove V1, and the contact between the click pin 3 and the lens body 8 is lost, and the tripod fixing screw 2 is loosened so that there is no click feeling even when the lens body 8 rotates around the optical axis. Becomes Then, the lens body 8 is fixed by tightening the tripod fixing screw 2 at an arbitrary position.

[0014]

As described above, according to the structure of the present invention, it is possible to realize a lens barrel which can be fixed at an arbitrary photographing position without being influenced by a click and which can select whether or not a click is performed according to a situation. .

[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 an enlarged view of a click mechanism shown in FIG. 1;

FIG. 3 is a view of the click mechanism shown in FIG.

[Description of Signs] 1 Tripod seat 1A Void V1 V-groove V2 V-groove 1C Opening 2 Tripod fixing screw 3 Click pin 4 Interlocking changeover plate 4A Projection 5 Changeover switch 6 Switch cover 7 Fixing screw 8 Lens body 8A V-groove 9 Click spring 10 Tripod screw hole 20 Click mechanism

Claims (1)

[Claims] 1. A lens barrel having a tripod seat that is rotatable and slidable and can be fixed at an arbitrary position, a click mechanism for defining a rotation position of the tripod seat is provided, and click release means for releasing the click mechanism is provided. A lens barrel having a tripod seat provided.