JPH05130466A - Video camera - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a video camera suitable for tube observation, etc. by configuring the maximum length from the center to the outer end of the case body to be short. In a video camera in which a front block body B in which a solid-state image sensor 16 is arranged in a circular optical path space 11 is arranged in a case body A and is attached with a screw 12, a cross-sectional outer shape of the case body A is provided. The shape is basically a quadrangle, and the four corners are cut out to form an inclined surface 2, and a screw insertion hole 6 for inserting the screw 12 is provided in the inclined surface 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact single plate type video camera.

[0002]

Video cameras can be classified as broadcast, consumer, and industrial. In the fields of consumer use and industrial use, it is desired to reduce the size of the video camera as much as possible in order to expand the range of application by downsizing the video camera and the size of the device used.

As shown in FIG. 6, in a small video camera, a front block body B is housed in a case body A, and the front block body B is attached to the case body A with a screw 1.
Mounted at 2. This is because the front block body B can be removed from the case body A for convenience of repair, inspection and the like. In the past, the cross-sectional outer shape of the case body A perpendicular to the optical axis direction was formed in a quadrangular shape.

[0004]

However, in the conventional structure, as shown in FIG. 6, the longest length L from the center to the outer end of the case main body A is large, and therefore, when observing a pipe such as a water pipe, FIG. In, it was impossible to insert into a pipe having a radius L or more shown by a virtual line, and there was a limit to the usable pipe diameter.

Further, as shown in FIG. 6, a circular optical path space 11 is formed in the front block body B, and this optical path space 1
Since it is necessary to secure a space for inserting the screw 12 outside 1 from above, the length L ₁ from the center to each piece of the case body A cannot be reduced to a certain value or less. As a result, the longest length L to the outer end of the case body A is further increased, and thus the conventional video camera BK is unsuitable for tube observation and the like.

Therefore, an object of the present invention is to provide a video camera suitable for tube observation or the like, which has a shortest maximum length from the center to the outer end of the case body.

[0007]

A video camera according to the present invention for achieving the above object has a front block body in which a solid-state image pickup element is arranged in an optical path space having a circular cross section perpendicular to the optical axis direction. In the video camera in which the front block body is arranged in the case body and is attached to the case body with a screw, the cross-sectional outer shape of the case body at a right angle to the optical axis direction is basically a quadrangle, and The four corners are cut out to form an inclined surface, and a screw insertion hole for inserting the screw is provided in the inclined surface.

[0008]

Since the four corners of the case body having the largest dimension between the circular optical path space and the basically rectangular case body are inclined surfaces, and the screws are fastened using these inclined surfaces, the case body is inserted from the center. The length up to each piece can be made small without considering the space of the screw, and moreover, since the four corners of the quadrangle are inclined surfaces, the longest length from the center to the outer end of the case main body becomes small due to the above synergistic effect. ..

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show one embodiment of the present invention. 2 is an exploded perspective view of the video camera, FIG. 3 is a perspective view of the video camera, and FIG. 4 is a vertical sectional view of the video camera.
FIG. 5 shows a cross-sectional view of each video camera.

2 to 5, the video camera includes a case body A, a front block body B and a substrate block body C.
And the rear block body D are assembled.

The case body A is made of a material having a good thermal conductivity, and has a slender tubular shape whose cross-sectional outer shape is an octagon. Although this octagon is not a regular octagon, it is point-symmetric with respect to the optical axis center. Specifically, it is based on a regular quadrangle, and is formed by forming inclined surfaces 2 notched at 45 degrees at the four corners of the four surfaces 1. The four faces 1
Has a plurality of grooves 3 formed in the longitudinal direction so as to have a large total surface area, and positioning grooves 4 are respectively formed on the four surfaces 1. An adjusting hole 5 is formed on one of the four surfaces 1 (upper surface). Again 4
A screw insertion hole 6 is formed at the front end of each of the two inclined surfaces 2, and a screw insertion hole 6 is also formed at the two opposite surfaces of the rear end.

The front block body B is inserted into the front side of the case body A, and the front cylinder body 7 substantially covers the outside. The front cylinder 7 includes a front portion 8 and a mounting portion 9.
And the cylindrical portion 10 are integrally provided, and an optical path space 11 for entering light is formed in the whole of them.

The front portion 8 is arranged on the front surface of the case body A, and the lens mounting reference surface 8a is provided on the front surface of the front portion 8.
Is configured. The mounting portion 9 has an octagonal shape corresponding to the inner surface dimension of the case body A and is inserted into the case body A. Then, screw holes 9a are formed in the four inclined surfaces, and the screws 12 inserted into the screw insertion holes 6 of the case body A are screwed into the screw holes 9a so that the front cylinder 7 is attached to the case body A. It has been concluded.

The cylindrical portion 10 is formed with four notch grooves 10a in the optical axis direction from the rear end toward the front. An image frame plate 13, an optical filter 14, a buffer member 15, and a solid-state image sensor 16 are sequentially inserted into the cylindrical portion 10 from the front. Further, a threaded portion 10b is formed on the outer periphery of the tubular portion 10, and the adjustment ring member 1 described below is attached to the threaded portion 10b.
8 is screwed in. A positioning protrusion 10c is provided at the rear end of the tubular portion 10.

The image frame plate 13 has a substantially disk shape having the same size as the inner diameter of the cylindrical portion 10 and has a rectangular opening 13a. The aspect ratio of the opening 13a is set to be the same as that of the imaging surface 16a of the solid-state imaging device 16 described below.
Protrusions 13b are integrally provided on the outer periphery of the image frame plate 13 and at four corners of the opening 13a. The picture frame plate 13 is positioned so that the four protrusions 13 b project into the respective cutout grooves 10 a of the cylindrical portion 10.

The optical filter 14 has a rectangular shape and is constituted by laminating a low pass filter, an infrared cut filter and the like. The optical filter 14 is positioned so that its four corners project into the respective cutout grooves 10a of the cylindrical portion 10.

The buffer member 15 is made of an elastic material and has a substantially ring shape. The front surface of the buffer member 15 is brought into contact with the outer peripheral edge of the optical filter 14 to restrict forward displacement, and the rear surface thereof is brought into contact with the outer peripheral edge of the solid-state image pickup element 16 so that the buffer member 15 is used for solid-state imaging. The vibration applied to the element 16 is buffered.

The solid-state image pickup device 16 has an image pickup surface 16a at the center, and its rear surface is positioned and fixed to the back plate 17.

The back plate 17 has a substantially disc shape having a size slightly larger than the inner diameter of the tubular portion 10, and the front surface thereof has a guide ring portion 17 having the same diameter as the inner diameter of the tubular portion 10.
a is provided. And this guide ring portion 17
A part of a is inserted into the cylindrical portion 10. Further, a positioning groove 17b is formed in the upper portion of the back plate 17, and the positioning protrusion 10c of the front cylindrical body 7 is arranged in the positioning groove 17b so that the back plate 17 is restricted in its rotational position.

The adjusting ring member 18 has a threaded portion 1 on its inner circumference.
8a is formed, and the screw member 18a is screwed into the screw portion 10b of the tubular portion 10. A pressing portion 18b extending in the central direction is provided at the rear end of the adjusting ring member 18, and the pressing portion 18b is provided on the back plate 17a.
Pressing on the rear surface. That is, the adjusting ring member 18 presses the solid-state imaging device 16 against the cushioning member 15 via the back plate 17.

The substrate block C includes an inner case 20 and three substrates 21 housed in the inner case 20.
And etc. Two flexible substrates 22 are connected between the three substrates 21 arranged in a straight line, and the three substrates 21 thus integrated are arranged in a zigzag manner. Electronic components 23 are mounted on both surfaces of the three substrates 21, and a drive circuit for a video signal is configured by the three substrates 21.
A plate-shaped silicon rubber 34 is interposed between the adjacent substrates 21, and the upper surface of the electronic component 23 is in contact with the silicon rubber 34.

The inner case 20 is made of a member having conductivity and spring property and having a good heat transfer coefficient, and is composed of an upper case member 20a and a lower case member 20b. The upper case member 20a has a substantially U-shape, and the lower case 20b has a flat plate shape. The upper case member 20a and the lower case member 20b cover three substrates 21 substantially entirely. The upper surface of the upper case member 20a and the lower case member 20
Substrate supporting slits 24 are formed on the lower surface of b, and the corners of each substrate 21 are inserted into the respective substrate supporting slits 24. Screw insertion holes 25 are formed in the upper surface of the upper case member 20a and the lower surface of the lower case member 20b, and the screws 26 inserted in the respective screw insertion holes 24 are screwed into the screw holes 33 of the rear panel 29 described below. .. The tip side of each screw 26 is bent inside flexible substrate 2
It is inserted in the space formed by 2, and each of the screws 26 also positions the substrate 21. That is, the inner case 20 accommodates the three substrates 21 with the substrate supporting slit 24 and the screw 26 held at a constant interval.

Further, the upper case member 20a and the lower case member 20b have a tongue-shaped component pressure contact piece 27 protruding inward.
Are provided at several places, and the component pressure contact pieces 27 are in pressure contact with the electronic component 23, which generates a large amount of heat, by its leaf spring force.
On the contrary, the upper case member 20a and the lower case member 20b
The tongue-shaped case pressure contact pieces 28 protruding outward are provided at several places on all four surfaces of the case pressure contact pieces 2
8 are pressed against the four inner surfaces of the case body A by their leaf spring force. Therefore, the substrate block body C is housed in the case body A with a small gap and receiving the leaf spring force of the case pressure contact piece 28.

The rear block body D has a rear panel 29, and screw holes 30 are formed in the rear panel 29. The screw 31 inserted into the screw insertion hole 6 of the case body A is screwed into the screw hole 30 so that the rear block body D is attached to the rear end side of the case body A. Rear panel 29
Is extended inside the case body A, and a screw hole 3 is provided at the extended end.
Two are provided. The screw 26 inserted into the screw insertion hole 25 of the inner case 20 as described above is screwed into the screw hole 32, whereby the rear block body D and the substrate block body C are connected.

A connector 33 is fixed to the rear panel 29, and a video signal of the drive circuit is output from this connector 33.

The front block B is assembled by fixing the image frame plate 13, the optical filter 14, the buffer member 15, and the back plate 17 to the optical path space 11 in the cylindrical portion 10 from the rear of the front cylindrical body 7. The image pickup device 16 may be inserted in this order, and then the adjustment ring member 18 may be screwed into the tubular portion 10.

Assembling of the substrate block body C is performed by bending three substrates 21 in a zigzag manner, and the upper case member 20a and the lower case member 20b are attached to each of the substrates 21 thus bent.
Then, the corners of the respective substrates 21 are inserted into the respective substrate supporting slits 24 of the upper and lower case members 20a and 20b. Next, the rear panel 2 assembled as the rear block body D
The pair of screw holes 32 of 9 may be aligned with the screw insertion holes 25, and the screws 26 may be inserted into the screw holes 32. That is, the substrate block body C and the rear block body D are integrally assembled.

The video camera is assembled by inserting the substrate block body C and the rear block body D into the case body A from the rear of the case body A, and screwing the screw 31 into the screw hole 30 through the screw insertion hole 6. To do. Next, the front block body B is inserted into the case body A from the front of the case body A, and the screws 1
2 is screwed into the screw hole 9a through the screw insertion hole 6 to complete the process. In the description of the above-mentioned assembly, the connection of the connector is omitted for simplification of the description.

The video camera assembled in this way is
As shown in FIG. 1, the case body A having the largest dimension between the circular optical path space 11 and the basically rectangular case body A.
The four corners are used as the inclined surface 2 and the inclined surface 2 is used to screw 1
Since 2 is fastened, the length L ₁ from the center to each piece of the case body A can be set small without considering the space of the screw 12. Further, since the four corners of the quadrangle are the inclined surfaces 2, the maximum length L from the center to the outer end of the case body A is smaller than that in the case of the quadrangle. The maximum length L is much smaller than in the conventional case.

[0030]

As described above, according to the present invention, in the video camera in which the front block body is arranged in the case body and is fastened to the case body with a screw, the cross-sectional outer shape of the case body is changed. Since the quadrangle is basically used and the four corners are cut out to form an inclined surface and a screw insertion hole for inserting the screw is provided in the inclined surface, the longest length from the center to the outer end of the case body Since it becomes shorter, it is suitable for tube observation and the like.

[Brief description of drawings]

FIG. 1 is a schematic front view of a video camera (example).

FIG. 2 is an exploded perspective view of a video camera (example).

FIG. 3 is a perspective view of a video camera (example).

FIG. 4 is a vertical sectional view of a video camera (example).

FIG. 5 is a cross-sectional view of the video camera (example).

FIG. 6 is a schematic front view of a video camera (conventional example).

[Explanation of symbols]

A ... Case body, B ... Front block body, 2 ... Inclined surface, 6 ... Screw insertion hole, 11 ... Optical path space, 12 ... Screw, 1
6 ... Solid-state image sensor.

Claims (1)

[Claims] 1. A front block body having a solid-state imaging device arranged in an optical path space having a circular cross-section perpendicular to the optical axis direction, the front block body being arranged in a case body,
In addition, in the video camera attached to the case body with screws, the cross-sectional outer shape of the case body at a right angle to the optical axis direction is basically a quadrangle, and the four corners are cut out to form an inclined surface. A video camera characterized in that a screw insertion hole for inserting the screw is provided on the inclined surface.