JPH05137034A - Video camera - Google Patents

Abstract

PURPOSE:To minimize a supporting space of a substrate and also to increase the resistance to the external vibrations and impacts for a compact video camera. CONSTITUTION:An inner case 20 is provided in a case main body A, and each angle 21a of a substrate 21 is put into a substrate support slit 24 of the case 20. Thus the substrate 21 is supported by the case 20. Then the case pressure pieces 28 are provided in the upper, lower, right and left directions of the case 20. Each piece 28 is pressed to the inner surface of the main body A end the case 20 is supported by the main body A.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a compact 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.

In such a small-sized video camera, a front cylinder supporting a solid-state image pickup device is inserted in a case body, and a plurality of substrates constituting a drive circuit of the solid-state image pickup device are housed at a high packing density.

Conventionally, each board is fixed to the case body with a screw, or only one of the plurality of boards is fixed to the case body with a screw, and the other boards are screwed with a connector or the like. It was fixed on the substrate.

[0005]

However, according to the above configuration, as shown in FIG. 7, the screw insertion holes 40 must be formed at each corner of the substrate 21, and the screw insertion holes 40 are formed.
Must be formed at a certain distance d from the substrate end due to problems with the head diameter of the screw 41 and strength. Therefore, a large space must be secured at each corner of at least one substrate 21 for screw fastening, which causes a reduction in the mounting area. At present, the size of the board itself is becoming smaller due to the downsizing of electronic parts, etc., and the ratio of the space for screw fastening to the board area is gradually increasing.

Further, according to the above construction, since at least one substrate 21 is fastened to the case main body by the screw 41, vibrations / impacts from the case main body are directly transmitted to the substrate 21 and are weak against vibrations / impacts. was there. In particular, if the soldering volume becomes smaller due to the downsizing of electronic parts, it becomes more vulnerable to vibrations and shocks, which poses a serious problem in downsizing the video camera.

Therefore, it is an object of the present invention to provide a video camera that minimizes the space for supporting the substrate and is resistant to external vibrations and impacts and suitable for downsizing of the apparatus.

[0008]

A video camera according to the present invention for achieving the above object has an inner case disposed in a case body, a substrate supporting slit is provided in the inner case, and a substrate is supported in the substrate supporting slit. The corners of the inner case are inserted to support the substrate with the inner case and elastically deformable case pressing pieces are provided in four directions of up, down, left and right of the inner case, and the case pressing pieces are respectively provided on the inner surface of the case body. The inner case is pressed and supported by the case body.

[0009]

[Function] Since the corner of the substrate is inserted into the substrate supporting slit of the inner case to support the substrate, the space for supporting the substrate may be very small, and the inner case supporting the substrate is pressed into the case body. Since it is supported via the piece, vibration and impact from the case body are buffered by the case pressure contact piece and transmitted to the inner case.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show one embodiment of the present invention. 3 is an exploded perspective view of the video camera, FIG. 4 is a perspective view of the video camera, and FIG. 5 is a vertical sectional view of the video camera.
FIG. 6 shows a cross-sectional view of each video camera.

3 to 6, 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 good heat 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 tubular 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 constructed 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.

As shown in detail in FIGS. 1 and 2, the substrate block C comprises an inner case 20 and three substrates 21 and the like housed in the inner case 20. 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 material having conductivity and spring properties 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 21 of each substrate 21 are formed in the respective substrate supporting slits 24.
a is inserted. 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 end side of each screw 26 is inserted into the space formed by the bent inner flexible substrate 22, and the position of the substrate 21 is also determined by each screw 26. 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.

3 to 6, the rear block body D has a rear panel 29, and a screw hole 30 is 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. The rear panel 29 is extended inside the case main body A, and a screw hole 32 is provided at the extended end. 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 corner 21a of each substrate 21 is inserted into each substrate support slit 24 of the upper and lower case members 20a and 20b. Next, the pair of screw holes 32 of the rear panel 29 assembled as the rear block body D may be aligned with the respective screw insertion holes 25, and the screws 26 may be screwed into the respective screw insertion holes 25. 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. Since each case pressure contact piece 28 is elastically deformed and housed when the board block body C is inserted, the board block body C is arranged in the case body A in a state of receiving the leaf spring force of the case pressure contact piece 28. Will be. Next, the front block body B is inserted into the case body A from the front of the case body A, and the screw 12 is inserted into the screw insertion hole 6
It is completed by screwing into the screw hole 9a via. In the description of the above-mentioned assembly, the connection of the connector is omitted for simplification of the description.

When vibrations / impacts are applied to the video camera assembled in this way, the vibrations / impacts are buffered by the case pressure contact pieces 28 and transmitted to the substrate block body C. Further, since the substrate 21 is supported by being inserted into the substrate supporting slit 24 of the inner case 20, the vibrations / impacts transmitted to the substrate block C are not directly transmitted to the substrate 21 but are somewhat buffered and are thus damped on the substrate 21. It is transmitted. From the above, since vibrations and impacts from the outside are sufficiently weakened and transmitted to the substrate 21,
Suitable for mounting small electronic components.

Further, since each corner 21a of the board 21 is inserted and supported in the board supporting slits 24 of the upper case member 20a and the lower case member 20b, the space required for supporting the board 21 is small. I'm done. Therefore, since the ratio of the component mounting area to the total board area is large, the board 21 itself can be made small and the video camera can be miniaturized.

[0032]

As described above, according to the present invention, each corner of the substrate is inserted into the substrate supporting slit of the inner case to support the substrate by the inner case, and the inner case is provided with the case pressure contact piece. Since the case pressure contact piece is pressed against the inner surface of the case body to support the inner case inside the case body, the space for supporting the substrate is reduced,
In addition, the substrate is resistant to external vibrations and impacts, and thus, the effect of being suitable for miniaturization of the video camera is achieved.

[Brief description of drawings]

FIG. 1 is a perspective view of a substrate block body (embodiment).

FIG. 2 is an exploded perspective view of a substrate block body (embodiment).

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

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

FIG. 5 is a vertical sectional view of a video camera (example).

FIG. 6 is a cross-sectional view of a video camera (example).

FIG. 7 is a partial perspective view of a substrate (conventional example).

[Explanation of symbols]

A ... Case body, 20 ... Inner case, 21 ... Substrate,
21a ... Corner of substrate, 24 ... Slit for supporting substrate, 28 ... Crimping piece for case.

Claims (1)

[Claims] 1. An inner case is arranged in a case body, a board supporting slit is provided in the inner case, and a corner of the board is inserted into the board supporting slit to support the board by the inner case and the inner case. Video is characterized in that case press contact pieces which are elastically deformable are provided in four directions of up, down, left and right, and the case press contact pieces are respectively pressed against the inner surface of the case body to support the inner case on the case body. camera.