JPH0246072Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field of the Invention The present invention relates to a printed board unit in which two or more printed boards are attached at a predetermined interval.

(b) Background of the technology In electronic and communication equipment, two or more printed boards are installed side by side and integrated to form a printed board unit, and a plurality of such printed board units are further mounted on the shelf of a rack. They are implemented in parallel and operated in parallel.

(c) Conventional technology and problems An example of the conventional structure of the above printed board unit is as follows.
FIG. 1 shows a partially broken perspective view.

In FIG. 1, a first printed board 1 is attached to the lower surface of an electromagnetic shielding frame plate 3 that is U-shaped in plan view so as to form a bottom plate. On the surface of the first printed board 1 on the opening side of the frame board 3, a plug portion 1a is formed protrudingly for plug-in connection to a connector provided on a backboard of a shelf (not shown).

At each of the four corners of the first printed board 1, columnar spacing members 5 are protruded, each of which is attached to the lower surface of the first printed board 1 by machine screws (not shown).

For example, the flat cable 7 is connected to the opening side of the frame plate 3.
The second printed board 2 electrically connected to the first printed board 1 by the spacing member 5
Place the second printed board 2 so that the holes drilled at the four corners of the board 2 correspond to the screw holes 5a provided on the top surface, and screw into the screw holes 5a from the top surface using machine screws 6. It is mechanically attached to the first printed board 1 and integrated therewith. Then, the electromagnetic shielding cover 4 is attached to the opening in the upper part of the frame board 3 using screws (not shown) so as to cover the upper surface of the second printed board 2.

The printed circuit board unit configured as described above is plug-in mounted in a shelf (not shown) so that it can be inserted and removed. However, when checking, electrical testing, or maintaining the components mounted on the first and second printed boards 1 and 2, the four machine screws 6 must be removed each time.
It is a hassle to have to remove the printed board 2.

(d) Purpose of the invention The purpose of the present invention is to solve the above-mentioned conventional problems and to provide a printed board unit that is easy to assemble.

(e) Structure of the invention The gist of the structure of the invention that can achieve the above purpose is that, as illustrated in FIGS. In a printed board unit in which the second printed board 2 is pivotably mounted in a tiltable manner and circuit-connected to each other, a pair of intervals consisting of two members 9 and 12 swingably connected by a support shaft 17 is used. Ingredients 8,
Both printed board attachment end faces of 8 are removably attached to one opposing face of the first and second printed boards with the support shafts on the same axis, and the other opposing faces of the first and second printed boards The spacers 8, 8 are detachably attached via a spacing member 5, and each of the spacers 8, 8 has a bent locking portion 14a extending from the printed board mounting end surface, and the locking portion is connected to the printed board. This printed board unit is characterized in that the spacer is engaged with an end face so as not to rotate in the plane direction of the printed board.

(f) Examples of the invention The invention will be explained in detail below with reference to examples with reference to FIGS. 2 and 3. Note that the same reference numerals indicate the same target parts throughout the figures.

FIG. 2 is a perspective view showing a spacer according to an embodiment of the present invention in a separated state, and FIG. 3 is a perspective view with an electromagnetic shield plate cut away in an embodiment of a printed board unit of the present invention. .

In FIG. 2, the spacer 8 is composed of two members, namely a male member 9, a female member 12, and a spring pin 17 which is a support shaft that swingably connects the two members.

A screw hole 11 is threaded in the upper end of the male member 9, which has a substantially rectangular column shape, and a pin hole 10 is bored through the both side surfaces parallel to the screw hole 11.

The female member 12 made of a metal plate has opposite side plates 13 which are U-shaped in plan view so that the male member 9 can be loosely inserted into both sides where the pin holes 10 are provided.
A back plate is formed in between, and this back plate is extended downward and bent inward to form a bottom plate 14, and the bottom plate 14 further extends at its tip opposite to the back plate side and is bent downward. A portion 14a is formed. Pin holes 15 are bored in both side plates 13 in correspondence with the pin holes 10 of the male member 9.

The inner diameter of the pin hole 10 of the male member 9 is slightly smaller than the outer diameter of the spring pin 17, and the inner diameter of the pin hole 15 bored in both side plates 13 of the female member 12 is slightly smaller than the outer diameter of the spring pin 17. slightly larger than the dimensions of Further, a screw hole 16 is threaded approximately at the center of the bottom plate 14.

With the above configuration, the U-shaped side plates 1 of the female member 12
Insert the pushing member 9 between 3, align both pin holes 10 and 15, and insert the spring pin 17 into pin hole 1.
5 to 10, and then through the other pin hole 15. The spring pin 17 is fixedly held in the pin hole 10 of the male member 9 by the elastic force in the radial direction, and is loosely fitted into the pin hole 15 of the female member 12, so that the male member 9 of both members Stopper member 1
2 is capable of tilting and swinging using a spring pin 17 as a support shaft. In this way, the male member 9 is perpendicular to the bottom plate 14 and comes into close contact with the back plate of the female member 12, and is prevented from tilting further toward the back, but can be tilted away from the back plate. The corners of the member 9 are chamfered in an arc shape so as not to come into contact with the back plate, and can be tilted to a state parallel to the bottom plate 14.

The end face of the male member 9 with the screw hole 11 and the lower end face of the bottom plate 14 of the female member 12 are respectively printed board attachment end faces. As shown in FIG. 3, the second printed board 2 is attached by inserting the hole in the second printed board 2 into the screw hole 11 of the male member 9 and screwing the small screw 18 therein. The first printed board is attached by inserting the holes in the first printed board 1 into the screw holes 16 of the female member 12 and screwing in the small screws 19 (FIG. 2).

A pair of spacers 8 are installed on both sides of the opposing connection between the printed boards 1 and 2 on one of the plug portions 1a, and the support shafts must be aligned on the same axis.
Otherwise, it would be difficult or impossible to swing the second printed circuit board 2. Therefore, during assembly, the spacer 8 is first attached to the first printed board 1. At this time, attach the locking portion 14a to the printed board 1.
By engaging and abutting the end face perpendicular to the plane of the spacer and fixing the screw 19, the spacer 8 does not rotate in the plane direction of the first printed board 1, that is, it is stable without rotating against the screwing force. In other words, the spring pin 17 can be positioned and attached in a position where the axes of the spring pin 17 coincide with each other. In this way, the second printed board 2 is then attached.

A columnar spacing member 5 is attached to both ends of the other side opposite to the one where the spacing member 8 is attached,
A second printed board 2 is attached to the upper end surface of this spacing member 5 with machine screws 6. The heights of the spacing member 5 and the spacer 8 are the same, and the second printed board 2 is attached in parallel to the first printed board 1.

When conducting an electrical test etc. of the first printed board 1,
By removing the machine screws 6 screwed into the two spacing members 5, the second printed board 2 is opened in a door-like manner relative to the first printed board 1 around the spring pin 17 of the spacer 8. be able to. At this time, since the first printed board 1 and the second printed board 2 are electrically connected by the flat cable 7, it is possible to test a circuit in which both printed boards are related.

The spacer 8 has the male member 9 side facing the first printed board 1.
However, in this case, the machine screws 18 will be on the first printed board 1 side.

A similar spacer 8 is placed on the top of the second printed board 2.
When the third printed board is attached using the spacing member 5, the second printed board and the third printed board can be opened and closed in the same way. In this case, the second printed board is regarded as the first printed board,
This can be understood by regarding the third printed board as the second printed board.

Of course, it is also possible to make both the male member and the female member of the spacer column-shaped so that the connecting portions are fitted by unevenness, but it is necessary to provide a locking portion on the reference side. Further, both may be formed by bending sheet metal. Furthermore, locking portions may be formed on both sides.

(g) Effect of the invention As explained above, the invention provides two or more printed boards in a predetermined manner, with two adjacent printed boards as the first printed board and the second printed board, respectively. They are installed in parallel and integrated with a distance of , but one of the opposite sides is installed via a pair of swingable spacers, which facilitates maintenance, testing, etc. of the printed board. In addition, since positioning can be performed using the locking portions, no special assembly jig is required for assembly, and the printed board unit has excellent practical effects.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of a conventional printed board unit, Fig. 2 is a perspective view of an embodiment of the spacer according to the present invention shown in a separated state, and Fig. 3 is a perspective view of a printed board unit of the present invention. A partially cutaway perspective view of the embodiment,
It is. In the figure, 1 is a first printed board, 2 is a second printed board, 3 is a frame board, 4 is a cover, 5 is a spacing member,
6, 18, 19 are machine screws, 7 is a flat cable, 8 is a spacer, 9 is a male member, 10, 15 are pin holes, 11, 16 are screw holes, 12 is a female member, 1
7 indicates a spring pin, respectively.

Claims (1)

[Claims for Utility Model Registration] A second printed board 1 is installed parallel to the first printed board 1 at a predetermined interval.
In a printed board unit in which a printed board 2 is pivotably mounted in a tiltable manner and circuit-connected to each other, a pair of spacers 8 are comprised of two members 9 and 12 that are swingably connected by a support shaft 17. . The opposing surfaces are detachably attached via a spacing member 5, and the spacers 8, 8 have a bent locking portion 14a extending from the printed board mounting end surface, and the locking portion is connected to the printed board. A printed board unit characterized in that the spacer is engaged with an end surface of the board so as not to rotate in the plane direction of the printed board.