JP2503367Y2 - Lens mount mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a lens mount mechanism for a lens for a television camera or the like.

[Conventional technology]

Conventionally, as a lens mount mechanism for a TV camera lens or the like, after the lens is attached to the TV camera or the like, the portion fixed to the lens side is smoothly rotated with respect to the portion fixed to the camera side, A mechanism such as that disclosed in Japanese Utility Model Application Laid-Open No. 62-9244 has been proposed as one that can easily perform attitude control.

In this conventional mechanism, the rotary mount fixed to the lens side is fixed to the fixed mount fixed to the TV camera side.
In addition to rotatably connecting via a bent ring-shaped friction member, a fixed protrusion is provided between the fixed mount and the rotary mount on one side, and a movable protrusion is provided on the other side so that they abut against each other. When fixing the lens side, the fixed protrusion and the movable protrusion can contact each other without rotating, and the fixed mount can be firmly fixed to the camera side, and when the lens side is rotated in the opposite direction, the rotation mount is integrated. Rotates, the fixed protrusion and the movable protrusion come into contact with each other from the opposite direction, and by further rotating by the movable amount of the movable protrusion, it is possible to rotate the lens side by 360 ° or more, and control the lens rotation posture over 360 °. It is something that can be done freely.

[Problems to be solved by the invention]

The problem with the conventional device is that since a bent friction member having a width such as a corrugation is interposed between the fixed mount and the rotary mount, the optical axis of the lens body does not fall even if the friction member is deformed. In order to prevent this, a pressing member or the like for preventing falling is required.Therefore, the bending ring-shaped friction member, the fixed protrusion and the movable protrusion between the fixed mount and the rotary mount have a width in the optical axis direction of the lens, Since it requires space and has many parts, it is not suitable for downsizing of the current lens mount mechanism.

[Means for solving problems]

Therefore, in the present invention, for the purpose of downsizing the lens mount mechanism, the fixed mount 1 fixed to the camera side, the rotary mount 2 fixed to the lens side, and the rotary mount 2 made elastic with respect to the fixed mount 1. A mount spring member 3 frictionally rotatably coupled to each other, an arc-shaped guide hole 4 provided in the mount spring member 3, and a fixed mount 1 or a rotary mount 2 fixed through one of the arc-shaped guide holes 4; A fixing member 5 for fixing the mount spring member 3 to one of the fixed mount 1 or the rotary mount 2 so as to be elastically frictionally rotatable along the arc of the arc-shaped guide hole 4, and the fixed mount 1 or the rotary mount 2. The other and the mount spring member 3 are stopper regions 6a, 6b smaller than the arc of the arc-shaped guide hole 4 which are in contact with each other and prevent rotation of the other, in contact with each other. An object of the present invention is to provide a lens mount mechanism suitable for miniaturization by removing a member that takes up a space in the optical axis direction, such as a bent ring-shaped friction member.

[Action]

According to the lens mount mechanism of the present invention having the above structure, when the lens side is fixed to the camera side, the stopper member 6a of the mount spring member 3 and the stopper 6b of the fixed mount 1 which rotate together with the rotary mount 2 are provided. And the mounts 1 and 2 rotate at the same time to fix the fixed mount 1 to the camera side, and within a fixed limit, the mount spring member 3 rotates within a range in which the fixed member 5 rotates along the arc of the arc-shaped guide hole 4. Only the extra rotation is stopped and the lens is fixed. After that, when the lens side is rotated in the direction opposite to the fixing direction, the stopper members 6a and 6b are rotated away from each other, and the rotary mount 2 makes one round with respect to the fixed mount 1.
Again, the stopper members 6a and 6b are freely rotated until they come into contact with each other, and after the contact, the mount spring member 3 is fixed along the arc of the arc-shaped guide hole 4 to the fixing member 5.
To rotate 360 degrees to stop,
Rotation of more than ° is possible.

〔Example〕

The present invention will be described in detail with reference to the embodiments shown in the drawings. Reference numeral 1 is a fixed mount having a mounting screw 1a which is screwed and fixed to the television camera side. 2 is the lens body
This is a rotary mount in which 10 is screwed and fixed to the screw portion 2a and then integrally fixed with a set screw 11 or the like. The fixed mount 1
The outer peripheral flange portion 1b and the inner peripheral wall portion 2b of the rotary mount 2 are rotatably in surface contact with each other and face each other. Reference numeral 3 denotes a ring-disc-shaped mount spring member, which is provided with an arcuate guide hole 4, and which is penetrated through the arcuate guide hole 4 and fixed to one of the fixed mount 1 or the rotary mount 2 by: It is fixed to one of the fixed mount 1 or the rotary mount 2 rotatably along the arc of the arc-shaped guide hole 4 elastically and frictionally. A stopper member 6a smaller than the arc of the arc-shaped guide hole 4 that abuts each other in the opposite rotation range of the mount spring member 3 and the other of the fixed mount 1 or the rotary mount 2 to prevent the other from rotating. 6b and are provided.

In the case of the embodiment, the outer circumferential portion of the mount spring member 3 is provided with three arc-shaped guide holes 4 at the same arc angle, and the rotary mount penetrates the arc-shaped guide holes 4. Two
The mount spring member 3 is rotatably attached to the rotary mount 2 along the arc of the arc-shaped guide hole 4 with elastic friction by the fixing member 5 in the form of a set screw.
On the other hand, on the inner peripheral portion of the mount spring member 3, a stopper member 6a having a small arc angle is provided at one location by the arc of the arc-shaped guide hole 4, and the stopper mounted on the fixed mount 1 at the same arc angle is provided. It is configured to abut the member 6b.

In the above configuration, when the lens body 10 is screwed and fixed to the television camera (not shown), the rotary mount 2 and the fixed mount 1 rotate integrally due to the elastic friction of the mount spring member 3 in contact with each other. From the above, the mount screw 1a of the fixed mount 1 can be screwed into the female screw on the camera side up to the state just before tightening, and once the fixed mount 1 stops there, the rotary mount 2 further resists the elastic friction of the mount spring member 3. The fixed mount 1 can be rotated until the stopper member 6a comes into contact with the stopper member 6b protruding in its rotation range. Further, with the stopper members 6a and 6b abutting, the mount spring member 3 is arcuately guided. It can be rotated until the arc end of the hole 4 comes into contact with the fixing member 5, and the fixed mount 1 is finally tightened together to make a TV camera. It can be firmly fixed to the side. After mounting, the lens body 10
In order to control the posture of the lens body 10, when the lens body 10 is rotated in the direction opposite to the tightening direction, the rotation mount 2 causes the stopper member 6a to integrally separate from the other stopper member 6b with the elastic friction of the mount spring member 3. Rotate to about 360 °
The stopper member 6a can be rotated to rotate from the opposite direction until it abuts the other stopper member 6b, and further, until the opposite arc end of the arc-shaped guide hole 4 abuts the fixed member 5.
The posture can be controlled up to a position exceeding 0 °. Then, if the lens body 1 is rotated more strongly in the same direction,
The fixed mount 1 can be removed from the camera side.

〔effect〕

As described above, according to the lens mount mechanism of the present invention, the fixed mount 1 fixed to the camera side, the rotary mount 2 fixed to the lens side, and the rotary mount 2 elastically frictionally attached to the fixed mount 1. Mount spring member 3 for rotatably connecting with each other, arcuate guide hole 4 provided in mount spring member 3, and penetrating arcuate guide hole 4 and fixed to one of fixed mount 1 or rotary mount 2. The mount spring member 3 is elastically frictionally guided into the arc-shaped guide hole 4
A fixed member 5 that is fixed to one of the fixed mount 1 or the rotary mount 2 so as to be rotatable along the arc of, and a rotational range where the other of the fixed mount 1 or the rotary mount 2 and the mount spring member 3 face each other. Since the stopper members 6a and 6b, which are smaller than the arc of the arc-shaped guide hole 4 for abutting against each other to prevent the rotation of the other party, are formed, a bent ring shape between the fixed mount and the rotary mount in the conventional mechanism is formed. By removing the structure of the friction member and the fixed projection and the movable projection between the fixed mount and the rotary mount, the fixed mount can be firmly fixed to the camera side by the mount spring member 3 in place of this, and then the lens side. When the lens is rotated in the opposite direction, it is possible to rotate the lens side by 360 ° or more, and it is possible to freely control the rotational posture of the lens over 360 °. Serial and flexure ring-shaped friction member in the conventional device, the fixed projections and the movable protrusion and the fixed mounting and the rotary mount, takes the width direction of the optical axis of the lens,
It requires space and has a large number of parts, which not only has the effect of solving the problem that is not suitable for downsizing of the current lens mount mechanism, but the mount spring member 3 is a flat mount and a rotary mount. Since elastic frictional contact is made over a wide area, a large amount of frictional resistance can be obtained, which is effective in providing a strong mounting device.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a main portion of the embodiment of the present invention showing a partial vertical section, FIG. 2 is a side view of the main portion, and FIG. 3 is an enlarged vertical front view of the main portion. is there. 1 …… Fixed mount 2 …… Rotary mount 3 …… Mount spring member 4 …… Arcuate guide hole 5 …… Fixed member 6a, 6b …… Stopper member 10 …… Lens body

Claims (1)

(57) [Scope of utility model registration request] 1. A fixed mount 1 fixed to the camera side,
A rotary mount 2 fixed to the lens side, a mount spring member 3 for rotatably connecting the rotary mount 2 to the fixed mount 1 with elastic friction, and an arc-shaped guide provided on the mount spring member 3. Hole 4 and arcuate guide hole 4
Is fixed to one of the fixed mount 1 or the rotary mount 2 and is rotatably attached to the mount spring member 3 along the arc of the arc-shaped guide hole 4 by elastic friction. An arc of the arc-shaped guide hole 4 that abuts against each other in the opposite rotation range of the fixing member 5 that is fixed to the other, the other of the fixed mount 1 or the rotary mount 2 and the mount spring member 3 to prevent the rotation of the other. Lens mount mechanism consisting of smaller stopper members 6a, 6b