JPH05275872A - Mounting apparatus for printed wiring board - Google Patents

Abstract

PURPOSE:To perform a working step easily and promptly for mounting and dismounting a printed circuit board. CONSTITUTION:A printed wiring board 21 with a grounding pattern 20 is sustained in a freely sliding way by a board supporting part 22 of a main case 23. A board supporting member 27 is provided along the sliding track of the printed wiring board 21 in the main case 23. Then, the printed wiring board 21 is pushed to the board supporting member 27 with a board pushing spring 28. At least either the board pressing spring 28 or the board supporting member 27 is grounded as an earth body (G) by an earth-body forming means so that the printed circuit board is fixed in a connecting place between the earth body (G) and the grounding pattern 20 by a board position fixing part 32. By fitting a projected part 30 into a recessed part 31, the printed wiring board 21 is fixed in place with the board position fixing part 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed wiring board mounting device for grounding and fixing a printed wiring board to a body case.

[0002]

2. Description of the Related Art An example of a conventional device of this type is shown in FIG. First, a conductive case-like main body case 2 having an opening 1 formed on the back surface is provided, and a board supporting portion 4 for slidably supporting a printed wiring board 3 is attached to an inner wall of the main body case 2. Has been. Further, the printed wiring board 3 is attached with a grounding body 6 which is bent at a right angle from an end thereof and is electrically connected to a grounding pattern 5 formed by a printed pattern. Two ground pieces 7 are formed in the body case 2 by bending both sides of the opening 1 at right angles, and the ground body 6 attached to the printed wiring board 3 is attached to the ground pieces 7. It is screwed on.

In such a structure, the grounding body 6 of the printed wiring board 3 inserted into the board supporting portion 4 is screwed to the grounding piece 7 of the main body case 2, whereby the board supporting portion 4 is formed.
The printed wiring board 3 supported by is fixed in position and grounded at the same time.

Next, FIG. 6 shows another conventional example. That is, a pair of ground springs 12 that are electrically connected to the ground pattern 11 are attached to the printed wiring board 10. These ground springs 12 are used for the printed wiring board 10
Has an elastic portion 13 that projects slightly outward from the side portion of the.
The main body case (not shown) to which the printed wiring board 10 is attached has a structure substantially the same as that of the main body case 2 illustrated in FIG.
It has a position fixing portion (not shown) for screwing.

In such a structure, when the printed wiring board 10 is attached and fixed to the main body case, the elastic portion 13 of the ground spring 12 contacts the inner wall of the main body case, and the printed wiring board 10 is grounded.

[0006]

However, the apparatus illustrated in FIGS. 5 and 6 has a drawback that the work for attaching and detaching the printed wiring board to and from the main body case is complicated. That is, in the device illustrated in FIGS. 5 and 6, when the printed wiring board is attached to or detached from the main body case, the screw must be tightened or loosened, so that the work is complicated and the attachment or detachment of the printed wiring board is difficult. Difficult to do easily and quickly.

[0007]

According to the present invention, a printed wiring board on which a ground pattern is formed and a main body case having a substrate supporting portion for slidably supporting the printed wiring board are provided and guided by the substrate supporting portion. A substrate supporting body formed on the main body case and positioned on the slide locus of the printed wiring board, a substrate pressing spring for pressing the printed wiring board against the substrate supporting body, and at least the substrate pressing spring and the substrate supporting body. A grounding body forming means for grounding one of them to form a grounding body, and a board position fixing portion for fixing the position of the printed wiring board by fitting the convex portion and the concave portion at a position where the grounding body and the ground pattern contact each other. It was Here, “contact between the grounding body and the grounding pattern” includes not only direct contact but also indirect contact.

[0008]

When the printed wiring board is inserted into the main body case and slid while being supported by the board supporting portion, the printed wiring board is held between the board supporting body and the board pressing spring. Then, when the printed wiring board is inserted up to the position where the ground pattern contacts the board support body or the board pressing spring that is the ground body, the convex portion and the concave portion of the board position fixing portion are fitted together,
The printed wiring board is fixed in position at that position. Also,
To remove the printed wiring board from the case, pull the printed wiring board. As a result, the projection and the recess are disengaged from each other, and the printed wiring board is removed. In this way, the printed wiring board is fixed in position and grounded simply by inserting the printed wiring board into a predetermined portion in the main body case and pushing it in, and the position is fixed and grounded by simply pulling out the printed wiring board. Therefore, the work of attaching and detaching the printed wiring board can be facilitated and speeded up.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. First, a printed wiring board 21 having a ground pattern 20 formed by a print pattern on both sides,
There is provided a conductive main body case 23 to which a pair of substrate supporting portions 22 that slidably support the printed wiring board 21 are attached. Here, the ground pattern 20 is formed along both sides of the printed wiring board 21 up to the end. The board supporting portion 22 is attached to inner wall surfaces 23 a of the main body case 23 facing each other, and a supporting groove 24 into which both side portions of the printed wiring board 21 are fitted and the supporting groove 24.
And an elastic body 25 extending toward.

Next, on the back surface of the main body case 23,
An opening 26 that is closed by a back cover (not shown) is formed. In the vicinity of the opening 26, the printed wiring board 21 guided by the board supporting portion 22 is provided.
A pair of substrate supports 27 are formed so as to be positioned on the slide locus of the lower surface of the. The substrate support 27 is formed by cutting out both side walls of the main body case 23 in a U shape and bending it at a right angle toward the inside. Further, since the substrate support 27 is a part of the main body case 23 having conductivity, the main body case 2
It is grounded to 3 and serves as a grounding body G. Therefore, the conductive main body case 23 constitutes the grounding body forming means.

The printed wiring board 21 is provided with
Conductive substrate pressing springs 28 are attached to both ends of the ground pattern 20 to cover the ends. The board pressing spring 28 includes a fixing piece 28a fixed to the upper end portion of the printed wiring board 21 by a rivet 29,
An elastic piece 28b that wraps around the lower surface of the printed wiring board 21 from the fixing piece 28a and elastically contacts the lower surface.
It is formed by and. The end of the elastic piece 28b is bent in a direction away from the lower surface of the printed wiring board 21.

Next, on the upper surface of the substrate supporting portion 27,
The convex portion 30 is formed by half-cutting. Half-cutting is a technique for forming a convex portion by performing a press that does not completely punch the workpiece. Further, the printed wiring board 21 is provided with a fitting hole 31 as a recess at a position covered by the fixing piece 28a of the board pressing spring 28. The ground pattern 20 printed on the lower surface of the printed wiring board 21 contacts the upper surface of the substrate support 27, which is the ground member G, at the position where the protrusion 30 is fitted in the fitting hole 31. Then, the elastic piece 2 of the substrate pressing spring 28 is formed on the upper surface of the substrate support 27.
Each part is positioned so that 8b may contact. Therefore, the convex portion 30 and the fitting hole 31 form a board position fixing portion 32.

In such a structure, the main body case 23
In order to mount the printed wiring board 21, the both sides of the printed wiring board 21 are inserted and pushed into the support grooves 24 of the board supporting portion 22. Then, the printed wiring board 21
Is slid while being supported by the substrate supporting portion 22 without rattling by the elastic body 25, and the elastic piece 28 of the substrate pressing spring 28 is moved.
When b comes into contact with the substrate support 27, it is pressed against the substrate support 27, and the protrusion 30 of the substrate support 27 is inserted into the fitting hole 31.
The position is fixed by fitting. In this state, the ground pattern 20 printed on the lower surface of the printed wiring board 21.
Is directly contacted with the substrate support 27 which is the grounding body G to be grounded, and the grounding pattern 20 printed on the upper surface of the printed wiring board 21 is the substrate supporting body 27 which is the grounding body G via the substrate pressing spring 28. Is indirectly contacted with and grounded. In this way, the position fixing and grounding of the printed wiring board 21 can be easily and quickly performed by simply inserting and pushing both sides of the printed wiring board 21 into the support groove 24 of the board supporting portion 22.

To remove the printed wiring board 21 from the main body case 23, the printed wiring board 21 is pulled. As a result, the fitting of the convex portion 30 of the substrate support 27 to the concave portion 31 of the printed wiring board 21 is easily released, and the printed wiring board 21 is pulled out as it is. Therefore, the printed wiring board 21 can be easily and quickly removed.

In the implementation, the ground pattern 2
0 may be formed on only one surface of the printed wiring board 21, and a convex portion is formed on the printed wiring board 21 and a concave portion is formed on the substrate support 27 so that the substrate position fixing portion is formed. May be configured, and the substrate position fixing portion is configured by forming a convex portion and a concave portion that are fitted to each other between the spring portion 28a of the substrate pressing spring 28 and the substrate support 27. May be.

A second embodiment of the present invention will be described with reference to FIGS. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. In the present embodiment, the substrate pressing spring is also formed as the grounding body G. That is, the board pressing spring 28 is not attached to the printed wiring board 21, but the board pressing spring 40 having conductivity is attached to the main body case 23. That is, the main body case 2
Both side walls of 3 are cut out in a U shape and bent at a right angle toward the inside to form a pair of spring support members 41. The formation position of these spring supports 41 is between the substrate support 22 and the substrate support 27 and is slightly higher than the slide locus of the upper surface of the printed wiring board 21 guided by the substrate support 22. is there. The substrate pressing spring 40 is attached to the spring support body 41. The substrate pressing spring 40 includes a fixing piece 4 fixed to the spring support 41 by a rivet 42.
0a at one end, extending to the substrate support 27 and elastically contacting the upper surface of the substrate support 27.
0b at the other end. The end of the elastic piece 40b is bent in a direction away from the substrate support 27.

Since the substrate pressing spring 28 has conductivity, it is grounded to the body case 23 to form a grounding body G. Therefore, the electrically conductive substrate pressing spring 28 and the body case 23 form a grounding body forming means.

In such a structure, the substrate support portion 22
When both sides of the printed wiring board 21 are inserted and pushed into the support grooves 24 of, the convex portions 30 of the board support 27 are fitted into the fitting grooves 31 of the printed wiring board 21, and the printed wiring board 2
1 is fixed in position. In this state, the ground pattern 20 printed on the upper surface of the printed wiring board 21 is brought into contact with the board pressing spring 28, which is the ground body G, to be grounded, and the ground pattern 20 printed on the lower surface of the printed wiring board 21 is grounded. The G substrate support 27 is contacted and grounded. Therefore, the position fixing and grounding of the printed wiring board 21 can be easily and quickly performed only by inserting and pushing both sides of the printed wiring board 21 into the support groove 24 of the board supporting portion 22.

Then, when the printed wiring board 21 is pulled, the fitting of the convex portion 30 to the concave portion 31 is easily released and the printed wiring board 21 is pulled out as it is, so that the printed wiring board 21 can be removed easily and quickly. Be seen.

In the implementation, the ground pattern 2
0 may be formed only on one surface of the printed wiring board 21.

[0021]

According to the present invention, the printed circuit board is pressed by the board pressing spring against the board supporting body formed in the main body case, and at least one of the board pressing spring and the board supporting body is grounded by the grounding body forming means. The printed wiring board is fixed by the board position fixing portion at a position where the grounding body and the ground pattern come into contact with each other, so that the printed wiring board is inserted into a predetermined portion in the main body case. The position of the printed wiring board can be fixed and the grounding can be performed only by pushing it in. Therefore, there is an effect that the attachment and detachment work of the printed wiring board can be facilitated and speeded up.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing a first embodiment of the present invention.

FIG. 2 is a perspective view thereof.

FIG. 3 is a perspective view showing a second embodiment of the present invention.

FIG. 4 is a vertical sectional side view thereof.

FIG. 5 is a perspective view showing a conventional example.

FIG. 6 is a perspective view showing another conventional example.

[Explanation of symbols]

 20 Ground Pattern 21 Printed Wiring Board 22 Board Support 23 Body Case 27 Board Support 28 Board Pressing Spring 30 Projection 31 Recess 32 Board Position Fixing Part G Grounding Body

Claims (1)

[Claims] 1. A slide of the printed wiring board provided with a printed wiring board on which a ground pattern is formed and a main body case having a substrate supporting portion slidably supporting the printed wiring board, and guided by the substrate supporting portion. A substrate support formed on the main body case and positioned on a locus, a substrate pressing spring that presses the printed wiring board against the substrate support, and at least one of the substrate pressing spring and the substrate support is grounded. Grounding means forming a grounding body, and a board position fixing part for fixing the printed wiring board at the position where the grounding body and the grounding pattern come into contact with each other by fitting the convex portion and the concave portion. A printed wiring board mounting device characterized by the above.