JPH0822026B2 - TV camera device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a television camera device used for back focus adjustment and the like.

2. Description of the Related Art Conventionally, an image pickup element in a television camera device of this type, for example, a CCTV television camera device is movably attached to a mounting surface for a lens, and the back focus (image pickup element) of the image pickup element is attached from the front of the camera. The optical axis direction) is adjustable.

FIG. 2 shows the configuration of a conventional television camera device. In FIG. 2, 1 is an adjustment ring, 2 is a lens seat,
Reference numeral 3 denotes a bracket. The plate spring 4, the sensor mounting seat 6, and the image pickup device 5 held by the holding plate 7 are fixed to the bracket 3 and fitted into the lens seat 2. After that, the adjustment ring 1 is screwed into the threaded portion 8 on the outer periphery of the lens seat 2 with the escutcheon 9 interposed therebetween. The back focus can be adjusted by rotating the adjustment ring 1 and moving the bracket 3 back and forth by the elasticity of the leaf spring 4.

The adjustment ring 1 positioned in front of the camera body in this way
Thus, the back focus of the image sensor 5 is adjusted.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-described conventional television camera device, the bracket with the image sensor is rotated in the front escutcheon, and the back focus is adjusted by the outer adjustment ring. There is a drawback that the size and size of the TV camera device cannot be reduced and the size cannot be simplified.

Means for Solving the Problems The present invention, in order to eliminate such drawbacks, a screw is directly provided on the outer periphery of a bracket with an image sensor, and the adjustment ring and the front escutcheon are sandwiched and fixed,
The bracket is moved back and forth by rotating the adjusting ring provided between the front escutcheon and the lens seat.

Therefore, according to the present invention, the adjustment ring is directly attached to the bracket having the image pickup element, and the bracket can be moved back and forth by rotating the adjustment ring. This has the effect that the focus can be adjusted easily and the size can be reduced.

Embodiment FIG. 1 shows the structure of an embodiment of the present invention.
In FIG. 1, 1 is an adjustment ring, 2 is a lens seat, 3 is a front escutcheon, 4 is a bracket, and a threaded portion 41 on which the threaded portion 11 of the adjustment ring 1 engages, and a surface 42 to be matched with the front escutcheon 3. It has the movement of the bracket 4 in the rotational direction with respect to the optical axis. Further, a mounting hole 43 for mounting the leaf spring 5 is provided, and a mounting hole 44 for mounting the element mounting seat 6 is also provided. Reference numeral 7 is an image pickup element, and 8 is an element pressing plate.

In this structure, the image pickup element 7 is fixed to the element mounting seat 6 by the element pressing plate 8 with the screw 9. This does not apply when the image sensor 7 has a mounting hole.

Next, attach the element mounting seat 6 and the leaf spring 5 to the bracket 4, fit it into the front escutcheon hole 31, and adjust the ring 1.
By matching the above, the bracket assembly portion is pulled forward by the elasticity of the leaf spring 5.

Next, the lens seat 2 is fixed with the screw 10. In this case, if a substrate that constitutes a circuit is attached to the rear side of the image pickup device 7, the image pickup device 7 can perform back focus adjustment from the lens side. That is, since the adjustment ring 1 can be rotated while watching the output state from the camera, the adjustment can be easily performed.

EFFECTS OF THE INVENTION The present invention provides an adjustment ring on the outer diameter of the lens seat as is clear from the above embodiment, and enables rotation of the adjustment ring to move only the bracket in the front-rear direction with respect to the optical axis, and the cylindrical shape By providing a flat part in a part and contacting the string provided in the escutcheon hole, movement in the rotation direction with respect to the optical axis can be regulated, so the configuration is simple and downsizing is possible. Becomes

Also, since the back focus can be adjusted at the base of the lens, the operation can be facilitated.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part structure of a television camera device according to an embodiment of the present invention, and FIG. 2 is a perspective view of a main part structure of a conventional television camera device. 1 ... Adjustment ring, 2 ... Lens seat, 3 ... Front escalator, 4 ... Bracket, 5 ... Flat spring, 6 ... Element mounting seat, 7 ... Imaging element, 8 ... Element pressing plate, 9 ......
screw.

Claims (1)

[Claims] 1. A lens seat fixed to an escutcheon, which has a circular hole forming a chord at least at one place, and an image pickup device are attached, and a flat surface is provided at at least one place of the cylindrical shape, and a cylindrical shape is formed. A bracket provided with a threaded portion on the arcuate outer periphery and capable of being housed in the hole and restricting movement in the optical axis rotation direction by the chord of the hole and this flat portion, and a spring for urging the bracket in the lens seat direction from the rear side. A television camera device comprising: a body and an adjusting ring that moves only the bracket and rotates while receiving the biasing force of the spring body to adjust the optical axis of the image sensor.