JPS5926699Y2 - tv jiyoung camera - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a television camera.

A conventional television camera is shown in FIGS. 1 and 2.

That is, in this television camera, an image pickup tube coil assembly 2 is attached to an image pickup tube 1, and this image pickup tube coil assembly 2 is placed on a horizontal piece of L-shaped brackets 3 and 4 arranged in a stacked manner, and a lens is mounted on the vertical piece thereof. 5 is fixed so that it faces the tube surface of the image pickup tube 1 (the optical axis of the lens 5 matches the tube axis of the image pickup tube 1), and the fixing screw 6 is inserted between the horizontal pieces of the L-shaped brackets 3 and 4. The image pickup tube coil assembly 2 and the horizontal pieces of the L-shaped brackets 3 and 4 are fixed by screwing onto the mounting base 2a of the image pickup tube coil assembly 2.

In this case, the lens 5 is fixed to the vertical pieces of the L-shaped brackets 3 and 4 by a lens attachment mount 57 and a mount attachment screw 8.

Further, the horizontal piece of the L-shaped bracket 3.4 has a long hole 3 a extending in the axial direction of the image pickup tube 1 in order to insert the fixing screw 6 therethrough.
, 4 a, and adjust the distance between the tube surface of the image pickup tube 1 and the lens 5 by attaching the image pickup tube coil assembly 2 to the lens 5 before tightening the fixing screw 6. This was done by moving closer or further away from the target and finding the best point.

However, in such a conventional television camera, it is very difficult to set the position of the image pickup tube coil assembly 2 at the optimum point.

That is, there is one point on the tube surface of the image pickup tube 1 that is focused to produce the best image, and the position must be adjusted to mechanically set that one point.

Furthermore, when tightening the fixing screw 6 after adjusting the position, the entire image pickup tube coil assembly 2 moves due to surface friction between the fixing screw 6 and its mounting surface, causing displacement, making it difficult to fix it at the optimal point. There was.

Therefore, an object of this invention is to provide a television camera that allows easy and accurate back focus adjustment during the manufacturing process and when replacing parts.

An embodiment of this invention is shown in FIGS. 3 and 4.

That is, in this television camera, the heads 9a of the spacing adjustment screws 9 are rotatably buried and positioned in the vertical pieces of the L-shaped brackets 3 and 4, and the male threaded portions (legs) 9b are
is screwed into the female threaded portion 2b provided on the mounting base 2a of the image pickup tube coil assembly 2, and the head 9a is rotated by a screwdriver or the like through the adjustment hole 3b provided in the vertical piece of the L-shaped bracket 3. 1 and the lens 5 according to the pitch of the male threaded portion 9b, and then tighten the fixing screw 6 to the mounting base 2 of the image pickup tube coil assembly 2.
The image pickup tube coil assembly 2 is fixed to the horizontal pieces of the L-shaped brackets 3 and 4 by tightening the image pickup tube coil assembly 2 to the horizontal pieces of the L-shaped brackets 3 and 4, and the other structure is the same as that of the conventional example.

In this case, the head 9a of the spacing adjustment screw 9 is the periphery of the receiving part 3C provided on the vertical piece of the L-shaped bracket 3 and the through hole 4b provided on the vertical piece of the L-shaped bracket (adjustment screw mounting plate) 4. It is rotatably held between the two parts.

Further, this interval adjustment screw 9 is provided in the axial direction of the image pickup tube 1 so that the image pickup tube coil assembly 2 can be moved in the axial direction of the image pickup tube 1.

In this way, with the simple configuration of adding the spacing adjustment screw 9, back focus adjustment can be easily and accurately performed during the manufacturing process and when replacing parts.

Furthermore, even when the image pickup tube coil assembly 2 is fixed with the fixing screw 6, the image pickup tube coil assembly 2 can be accurately fixed to the horizontal pieces of the L-shaped brackets 3 and 4 without movement due to frictional force.

Further, since the head 9a of the adjustment screw 9 is hidden, it will not rotate unexpectedly due to impact or the like, and the focus will not be lost.

Furthermore, since the tip of the driver is inserted into the adjustment hole 3b and the adjustment screw 9 is rotated, the driver can be positioned in the adjustment hole 3b, making focus adjustment extremely easy.

Further, the adjustment screw 9 does not require any special processing, and the assembly work is easy.

Furthermore, since the image pickup tube coil assembly 2 is fixed to the L-shaped brackets 3 and 4 with two mounting screws 6 and 6,
The image pickup tube coil assembly 2 will not be angularly misaligned with respect to the L-shaped brackets 3 and 4, and therefore the tube axis of the image pickup tube 1 and the optical axis of the lens 5 will not be misaligned.

As described above, the television camera of this invention can easily and accurately adjust the back focus during the manufacturing process and when replacing parts.

Additionally, since the head of the adjustment screw is hidden, it will not rotate accidentally due to impact, and the focus will not go out of order.

Furthermore, since the tip of the driver is inserted into the adjustment hole and the adjustment screw is rotated, the driver can be positioned in the adjustment hole, making focus adjustment extremely easy.

Further, the adjustment screw does not require any special processing and is easy to assemble.

Furthermore, since the image pickup tube coil assembly is fixed to the L-shaped bracket using two mounting screws, the image pickup tube coil assembly will not be angularly misaligned with respect to the L-shaped bracket. The tube axis and the optical axis of the lens will not deviate from each other.

[Brief explanation of drawings]

FIGS. 1 and 2 are a block diagram and a main part block diagram, respectively, of a conventional television camera, and FIGS. 3 and 4 are a block diagram and a main part block diagram, respectively, of an embodiment of this invention. DESCRIPTION OF SYMBOLS 1... Image pickup tube, 2... Image pickup tube coil assembly, 2a... Mounting base, 2b...
...female thread, 3, 4...L-shaped bracket),
3a, 4a...Elongated hole, 3b...Adjustment hole, 4b...Through hole, 3C...Receiver part, 5...・Lens, 6...Fixing screw,
7...Lens mounting mount, 8...
Mount installation screw, 9... Spacing adjustment screw,
9a...Head, 9b...Male thread part.

Claims (1)

[Scope of utility model registration request] an image pickup tube, an image pickup tube coil assembly that has mounting bases at the front and rear ends and holds the image pickup tube inserted into the center; an L-shaped bracket to be placed on a horizontal piece; a lens fixed to a vertical piece of the above-mentioned bracket so that its optical axis coincides with the tube axis of the image pickup tube; and an L-shaped bracket placed on a horizontal piece of the above-mentioned image pickup tube; first and second elongated holes, which are provided corresponding to the mounting positions of the mounting bases at the front and rear ends of the coil assembly, and whose long axes are perpendicular to the vertical pieces of the above-mentioned bracket; A first screw is screwed onto a mounting base at the front and rear ends of the image pickup tube coil assembly through a second elongated hole, thereby fixing the image pickup tube coil assembly to the horizontal piece of the box-shaped bracket.
and a second fixing screw, a spacing adjustment screw screwed into the mounting base at the front end of the image pickup tube coil assembly so as to be perpendicular to the vertical piece of the vertical piece of the vertical bracket, and a second fixing screw; a receiver part formed on the inner surface to receive the head of the spacing adjustment screw; and a receiver part fixed to the inside of the vertical piece of the vertical piece of the bracket to rotate the head of the spacing adjustment screw. an adjustment screw mounting plate that is movably held and allows the legs of the spacing adjustment screws to protrude from the through holes; and an adjustment screw that penetrates from the outer surface of the vertical piece of the bracket to the center of the support part. A television camera equipped with a power hole.