JPH0319261Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a printed circuit board fixing box that can securely and easily fix a printed circuit board to a box that accommodates the printed circuit board.

[Prior art] Conventionally, as this type of printed circuit board fixing box, the first
I got what is shown in the figure. In the figure, 1 is a case for fixedly housing a printed circuit board, 2 is a printed circuit board on which a plurality of electronic components 9 are mounted, and 3 is a lid fixed to the case 1 with screws 4. Also, 6 is a screw for fixing the board to the case, 7 is a screw 8
This is a support that maintains the distance between the substrates.

When assembling this printed circuit board fixing box, a plurality of printed circuit boards 2 are first inserted between the boards so that a predetermined distance can be maintained using the supports 7, and then the boards are fixed with screws 8. The printed circuit boards 2 stacked with the screws 8 are then fixed to the case 1 using a plurality of screws 6.
At the time of this fixing, since the screws are fastened with a tool, it is necessary to make a notch 10 in one of the printed circuit boards 2 in a concave shape.

Conventional printed circuit board fixing boxes are structured as described above, so when multiple printed circuit boards are housed in the case, it takes a lot of effort to assemble them using many screws and supports, and it also requires processing of the printed circuit boards. However, there were drawbacks such as poor work efficiency and uneconomical operation, such as the need for a large number of screws.

[Summary of the idea]

This idea was made in order to eliminate the above-mentioned drawbacks of the conventional ones, and by providing a plurality of concave rail-shaped grooves on opposite sides inside the case, it maintains a predetermined distance between the boards, and the grooves A printed circuit board fixing box is obtained in which a printed circuit board can be reliably housed in the case by providing a convex elastic protrusion in the middle and a convex elastic board locking member on the inner surface of the lid. It has the effect of

[Example of idea]

Hereinafter, one embodiment of this invention will be described based on FIG. 2, FIGS. 3A and 3B, and FIG. 5. In the figure, 1 is a case that accommodates multiple printed circuit boards;
2 is a plurality of printed circuit boards on which electronic components are mounted; 3 is a lid (hereinafter referred to as a lid) that is screwed into the opening of the case 1 with fixing screws 4, etc.; 3a is a lid 3;
5 is a concave rail-shaped groove for fixing the printed circuit board 2 provided on the inner surface of the case 1; Figures A and B show a top view and a cross-sectional view. Reference numeral 6 denotes a convex elastic projection that is provided in the middle of the groove 5 and forms an integral structure with the groove 5.

The printed circuit board fixing box of the present invention having the above-mentioned structure securely accommodates the printed circuit board 2 in the following manner. First, the printed circuit board 2 is inserted into the case 1. During insertion, the printed circuit board 2 is inserted perpendicularly into the lower groove 5 corresponding to the upper groove 5 of the case 1.
In this case, the entrance 7 portion of the groove 5 is widened to make it easier to guide the printed circuit board 2 into the groove 5. When the printed circuit board 2 passes through the protrusion 6 of the groove 5 and is inserted until it hits the case 1, the printed circuit board 2 is prevented from swinging due to the play on the width side of the groove 5, and is also restrained by the elasticity of the protrusion 6. Manufacturing errors in the thickness direction of the printed circuit board 2 are absorbed. Further, since the substrates are maintained parallel to each other by the interval between the grooves 5, there is no accident of contact between the substrates. After a predetermined printed circuit board 2 is housed in the case 1, by attaching the lid 3 to the opening of the case 1 with screws, the printed circuit board 2 is further prevented from moving in the orbital direction by the board locking material 3a, and The elasticity of the board locking member 3a absorbs manufacturing errors in the orbital direction of the printed circuit board 2, and the printed circuit board 2 is completely fixedly accommodated in the case 1.

In the above embodiment, the protrusion 6 is integrated with the groove 5 and has a convex shape, but as shown in FIGS. It may be fixedly provided. In this case, since it responds in a wave-like manner to the swinging of the printed circuit board 2, it can respond elastically to large changes, further improving reliability.

[Effect of idea]

As described above, according to this invention, a groove that serves as a rail for the printed circuit board is provided in the case that accommodates the printed circuit board, a protrusion is integrated into this groove, and a board locking material is provided on the inner surface of the lid. By providing this, manufacturing errors of the printed circuit board can be absorbed, and the printed circuit board can be restrained from two directions, ie, the thickness direction and the orbital direction, so that it can be reliably fixed to the case. In addition, it is possible to maintain a predetermined distance between the boards in the case, and it can be fixed and housed easily for work, and there is no need for screws, etc. for fixing, which improves work efficiency and allows for economical and secure fixation. This has the effect of providing an extremely superior printed circuit board fixing box.

[Brief explanation of drawings]

Figure 1 is a perspective view showing the configuration of a conventional printed circuit board fixing box before assembly, Figure 2 is a perspective view showing the configuration of a printed circuit board fixing box according to an embodiment of the invention before assembly, and Figure 3A is a perspective view showing the configuration of a conventional printed circuit board fixing box before assembly. Top view of the main parts, Figure 3B
4A is a sectional view of the main part of the same, FIG. 4A is a top view of the main part of a printed circuit board fixing box showing another embodiment of this invention,
FIG. 5 is a sectional view of the same main part, and FIG. 5 is a perspective view of the structure of a printed circuit board fixing box showing another embodiment of the invention, centering on a lid having a board locking member. 1... Case, 2... Printed circuit board, 3... Lid, 3a... Board locking material, 4... Fixing screw, 5...
...Groove, 6...protrusion. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] A printed circuit board fixing box comprising a case that accommodates a plurality of printed circuit boards on which electrical components are mounted and has an opening for inserting the printed circuit boards, and a lid that can be screwed into the opening of the case,
A plurality of concave rail-shaped grooves in which the plurality of printed circuit boards are maintained at predetermined intervals are formed on opposite surfaces of the inner surface of the case, and grooves are formed in the middle of the grooves to absorb manufacturing errors in the thickness direction of the printed circuit board. a plurality of protrusions having convex elasticity that suppress swinging of the printed circuit board in the thickness direction and fix the printed circuit board in the case; a printed circuit board fixing member having a convex elasticity that absorbs manufacturing errors, suppresses movement of the printed circuit board in the orbital direction, and fixes the printed circuit board within the case. box.