JPH07202441A - Case for mounted printed board - Google Patents

Abstract

PURPOSE:To provide a case for a printed board mounting electric, electronic and optical devices which exhibits buffering effect for vibration or impact while preventing resonance of printed boards. CONSTITUTION:A printed board 1 mounting electric, electronic and optical devices while connecting the housing 2, made of a conductive material, with the ground of the printed board through a flexible conductor 8 is attached, on the side edge part thereof, with a desired number of buffering blocks 7 slightly higher than the depth of the housing 2 through a fitting part 6. It is housed in the housing 2 while being compressed and a cover body 10 is fixed to the upper face of the housing 2 in order to house the mounting printed board 1 while holding by the compression force acting between the buffering block 7, the inner wall of housing and the cover body 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an environment in which an environment, such as an aircraft or an automobile, is constantly exposed to vibration, impact, etc. The present invention relates to a housing for a printed circuit board on which electronic and optical components are mounted.

[0002]

2. Description of the Related Art A conventional printed circuit board containing a printed circuit board on which electrical, electronic and optical components are mounted is
For example, as shown in FIG. 5, the printed circuit board 1 on which the mounting component 4 is mounted does not come into contact with the bottom portion 5 and the lid 10 of the housing 2 made of a conductive material, specifically, metal, so that the inside of the housing 2 is prevented. It was mounted on a metal support column 3 arranged at an appropriate position on the bottom 5 and screwed to hold it in the middle of the housing 2. Further, by mounting the printed circuit board on the support column 3 and screwing it to each other, the ground of the printed circuit board 1 and the housing 2 are provided with a reference potential, and they are set to the same potential in order to stably operate the circuit.

[0003]

However, as described above,
In the housing of the mounting printed circuit board, the mounting printed circuit board 1 is placed and screwed on the columns 3 at several places in the housing 2, so that the mounting printed circuit board 1 is supported in a small area.
If strong vibration or shock is applied to the printed circuit board housing,
The mounted printed circuit board 1 may be damaged at the screwed portion. Further, the mounted printed circuit board 1 in the housing 2 may resonate depending on the vibration condition, which adversely affects the component 4 mounted on the printed circuit board and causes a circuit malfunction. The present invention exerts a cushioning effect against vibration and shock,
The mounted printed circuit board made it difficult for resonance to occur,
An object of the present invention is to provide a housing for a mounted printed circuit board in which a printed circuit board on which electrical, electronic, optical components, etc. are mounted is housed.

[0004]

That is, as shown in FIG. 1, the mounting printed circuit board housing according to the present invention is such that the ground of the mounting printed circuit board 1 and the housing 2 made of a conductive material are, for example, flexible. Of the housing 2 is provided with the fitting portion 6 on the side surface at the side edge portion of the printed circuit board 1 on which the electric, electronic, optical components, etc., which are connected to each other by the electrically conductive conductor 8 and have the same potential are mounted. Block body 7 made of cushioning material with a height slightly higher than the depth
A desired number of the buffer blocks 7 are inserted through the fitting portions 6 of the cushioning block body 7, and are housed in the housing 2 in a compressed state, and the lid body 10 is attached to the upper surface of the housing 2. The mounting printed circuit board 1 is housed and held by a compressive force between the cushioning block body 7, the inner wall of the housing 2 and the lid body 10.

As the material of the cushioning block 7 used in the present invention, a plastic foam such as polyethylene foam, polyurethane foam, polystyrene foam, or a rubber foam is used. Further, through holes may be provided in the buffer material block body 7 in consideration of the heat dissipation of the printed circuit board 1, or a cooling medium may be included. The insertion position of the cushioning material block body 7 to be attached to the side edge portion of the printed circuit board 1 is appropriately selected depending on the arrangement of the mounting components 4 mounted on the printed circuit board 1. In addition, the mounting printed circuit board 1 and the housing 2 made of a conductive material.
In addition to using the flexible electric conductor 8 to electrically connect and to have the same electric potential, one of the buffer material block bodies 7 to be attached to the side edge portion of the printed board is a conductive buffer material. It may be made of blocks. However, in this case, it is necessary to pay attention to the pattern and the like of the printed circuit board in the portion in contact with the block made of the conductive cushioning material.

[0006]

The mounted printed circuit board 1 housed in the housing 2 is
Since the block body 7 made of a cushioning material inserted and arranged at the side edge portion of the printed board 1 is stored and held in the housing 2 in a compressed state, it is resonated by vibration or mounted by a shock. Even if position 1 is displaced, it will not be damaged.

[0007]

EXAMPLE An example of the package of the printed circuit board according to the present invention will be described below. Embodiment 1 FIG. 1 shows an embodiment of a housing for a mounted printed circuit board according to the present invention, in which a metal housing 2 is provided with a bottom portion of a metal housing 2 on its long side surface as shown in FIG. 5, a fitting portion 6 having a width and a height slightly smaller than the lateral width A and the thickness B of the mounting printed circuit board 1 arranged in parallel to the mounting printed board 1 is provided, and the height is slightly higher than the depth C of the housing 2. The rectangular block body 7 having a lateral width slightly larger than the inner width D of the housing 2 is 2
Individually, the fitting portions 6 are arranged so as to face each other, and both side edges of the mounting printed circuit board 1 are inserted and housed between the fitting portions 6 and 6 of the cushioning block body 7. Further, a lid 10 is attached to the upper opening of the housing 2 by screwing. Reference numeral 8 in the drawing denotes an electric conductor 8 used for connecting the ground of the mounted printed circuit board 1 and the metal casing 2 to have the same potential. The conductor 8 has a margin in length so that external force is not directly applied to the connection portion even if vibration or the like is applied. In this way, the mounted printed circuit board 1 is housed in a state in which a compressive force is applied by the buffer material block bodies 7, 7, the inner wall of the housing 2 and the lid body 10.

Embodiment 2 FIG. 3 is a top view (state in which the lid 10 is removed) of another embodiment of the housing for the mounted printed circuit board of the present invention, and FIG. 4 is a side view. In this example, a cushioning material block body 7 having a U-shaped cross section (a shape in which a part of the upper surface of the fitting portion 6 is cut off) is inserted and arranged at six side edge portions of the mounting printed circuit board 1. And is housed in the housing 2. The conductor 8
Instead, at least one of the buffer material block bodies 7 is made of a conductive material, specifically, a conductive rubber, and the ground of the mounting printed circuit board 1 and the housing 2 are electrically connected. Good. In this way, the assembling work is easier than using the conductor 8.

[0009]

In the storage body for the mounting printed circuit board of the present invention, the mounting printed circuit board 1 is composed of at least two cushioning block bodies 7 inserted in the side edges thereof, the inner wall of the housing 2 and the lid body 10. Since the mounting printed circuit board 1 is housed and held in the housing 2 with a compressive force applied thereto, the mounting printed circuit board 1 does not resonate due to vibration and is not damaged even if the position of the mounting printed circuit board 1 is displaced by a shock.

[Brief description of drawings]

FIG. 1 is a perspective explanatory view of an example of a mounted printed circuit board housing according to the present invention.

FIG. 2 is a perspective explanatory view of a cushioning material block body used as a housing body of the mounted printed circuit board of FIG.

FIG. 3 is an explanatory top view of another embodiment of the housing for the mounted printed circuit board of the present invention.

FIG. 4 is a side view of the housing of the mounted printed circuit board shown in FIG.

FIG. 5 is an exploded perspective view illustrating a conventional mounted printed circuit board housing.

[Explanation of symbols]

 1 ... Mounted printed circuit board 2 ... Housing 3 ... Support 4 ... Mounted component 5 ... Bottom of housing 6 Part 7 ... Block body made of cushioning material 8 ... Flexible conductor 10 ... Lid of housing

[Procedure amendment]

[Submission date] July 6, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0002

[Correction method] Change

[Correction content]

[0002]

2. Description of the Related Art A conventional printed circuit board containing a printed circuit board on which electrical, electronic and optical components are mounted is
For example, the printed board on which the mounting components are mounted is a conductive material,
Specifically, to prevent it from touching the bottom or lid of the housing made of metal, place it on a metal post that is placed at a suitable position on the bottom of the housing and screw it into place inside the housing. It was supposed to be held in the middle. Further, by mounting the printed circuit board on the pillar and screwing it to each other, a reference potential is provided between the ground of the printed circuit board and the housing, and the same potential is provided for stable operation of the circuit.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

[0003]

However, as described above,
In the mounted printed circuit board housing, the mounted printed circuit board is mounted and screwed on several posts in the housing, so the mounted printed circuit board is supported in a small area, and strong vibrations and shocks are applied to the printed circuit board housing. If added, the mounted printed circuit board may be damaged at the screwed part. Also,
Depending on the vibration condition, the mounted printed circuit board in the housing may resonate, which adversely affects the components mounted on the printed circuit board and causes a circuit malfunction. The present invention has a cushioning effect against vibrations and shocks and makes it difficult for the mounted printed circuit board housed to resonate. A printed circuit board on which electrical, electronic, optical components, etc. are mounted is housed in a housing. It is intended to provide a substrate housing.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a perspective explanatory view of an example of a mounted printed circuit board housing according to the present invention.

FIG. 2 is a perspective explanatory view of a cushioning material block body used as a housing body of the mounted printed circuit board of FIG.

FIG. 3 is an explanatory top view of another embodiment of the housing for the mounted printed circuit board of the present invention.

FIG. 4 is a side view of the housing of the mounted printed circuit board shown in FIG.

[Explanation of Codes] 1 ... Mounted printed circuit board 2 ... Housing 4 ... Mounted component 5 ... Bottom of housing 6 ... 7 ... ・ Block body made of cushioning material 8 ... Flexible conductor 10 ...

Claims (1)

[Claims] 1. A casing in which a fitting portion is provided on a side surface at a side edge portion of a printed circuit board on which electric, electronic, optical components and the like are mounted, with the ground of the printed circuit board and a casing made of a conductive material having the same potential. A desired number of block blocks made of cushioning material having a height slightly higher than the depth of the body are inserted and fitted through the fitting portions, and these are stored in a compressed state in the housing, and the lid is attached to the top surface of the housing. A mounting printed circuit board storage body, wherein the mounting printed circuit board is housed and held by a compressive force between the cushion material block body, the inner wall of the housing, and the lid body.