JPH0528794Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This idea is such that the front plate to which the hierarchical structure of the main printed wiring board and the sub printed wiring board is fixed allows the hierarchical structure to be moved in and out of the case.
The present invention relates to an electronic device which is attached to and detached from the case, and which is particularly easy to attach to the front panel of a hierarchical structure and requires a small number of parts.

[Conventional technology]

A conventional example will be described below with reference to the drawings. Figure 3 is a perspective view of the main parts of this electronic device;
The figure is also a side sectional view. In these figures, the main printed wiring board 11
A sub-printed wiring board 12 is attached via spacers 14 at its four corners and at appropriate locations on its long sides, forming a two-tiered hierarchical structure. The main and sub printed wiring boards 11 and 12 are attached to the spacer 14 using machine screws 6. On the other hand, a plurality of blocks 18 are fixed to the back side of the front plate 17, and the main printed wiring board 11 is attached to the lower surface of the block 18.
is fixed at one side edge with a machine screw 6. This front plate 17, the main body fixed to this,
The unit with the hierarchical structure consisting of the sub-printed wiring boards 11 and 12 is attached to a case (not shown) with the front plate 17 positioned on the surface.

[Problem that the idea aims to solve]

As explained above, in the conventional technology, in order to form a hierarchical structure of the main printed wiring board 11 and the sub printed wiring board 12, the four corners of the sub printed wiring board 12 and appropriate locations on the long side, for example, the center of the long side. total of 6 points
Spacers 14 are used at points. Therefore, the number of spacers 14 and the corresponding machine screws 6 increases, and it becomes necessary to drill corresponding holes in each of the main and sub printed wiring boards 11 and 12, resulting in an increase in assembly man-hours (screw fastening work). Also, because of the spacer 14, the main
There is a problem in that the effective area (mountable area) of each sub-printed wiring board 11, 12 also decreases. The purpose of this invention is to solve the problems of the conventional technology, to make it easy to attach to the front panel of the hierarchical structure, to reduce the number of required parts, and to increase the effective area of the printed wiring board. The purpose is to provide electronic devices.

[Means to solve the problem]

In order to achieve the above object, an electronic device according to the present invention includes: a front plate to which a hierarchical structure including one main printed wiring board and at least one sub printed wiring board is attached; In a device that is attached to and removed from the housing part so that the main printed wiring board can be inserted into and taken out from the housing part, the main printed wiring board has a pedestal (in the embodiment (hereinafter referred to as a block), the sub printed wiring board is inserted and held at the edge of the front plate side in a groove provided in the pedestal, and the main printed wiring board and the sub printed wiring board are They are hierarchically connected via spacing rods (referred to as spacers in the embodiment) at the edge opposite to the front plate.

[Effect]

One side edge of the main printed wiring board is fixed to the front plate side, and the sub printed wiring board is held by inserting its side edge on the same side into a groove formed on the front plate side. When attaching the hierarchical structure consisting of the main printed wiring board and the sub printed wiring board to the front panel, the main work is to fix the main printed wiring board at the side edges.

【Example】

An electronic device according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of essential parts of this electronic device, and FIG. 2 is a side sectional view thereof. In FIGS. 1 and 2, the main printed wiring board 1
On the other hand, two sub-printed wiring boards 2 and 3 are attached hierarchically via spacers 4 and 5 (the length of spacer 4 is shorter than that of spacer 5), respectively. Moreover, in this case, the spacers 4 and 5 are arranged only at both ends of the left front side of the sub printed wiring boards 2 and 3. Note that the installation is done using machine screws 6. On the other hand, on the back side of the front plate 7, a total of two blocks 8 are fixed at each end thereof, and one block 9 is fixed at approximately the center position. In addition, in FIG. 1, only one block 8 on the near side is shown. Also, 10
is a handle for attaching and detaching. The lower surface of the block 8 has a screw hole for mounting, and the front side shown in the figure has a groove 8 corresponding to the sub-printed wiring board 2.
A groove corresponding to the sub-printed wiring board 3 is formed in the left side (not shown). Similarly, the bottom surface of the block 9 has a mounting screw hole, and the surface has a groove 9a (same as the groove 8a) corresponding to the sub-printed wiring board 2.
and the groove 9b corresponding to the sub printed wiring board 3 are 2.
Formed in steps. Incidentally, the grooves formed in the blocks 8 and 9 may all be made common, so that the sub printed wiring boards 2 and 3 may fit into them sometimes and sometimes not. This means that so-called parts will be standardized. Main printed wiring board 1 and sub printed wiring boards 2 and 3
The installation of the hierarchical structure to the front plate 7 side is as shown in FIG. 2 as follows. The right edge of the sub printed wiring board 2 is connected to the groove 8a of the front block 8 and the groove 9a of the intermediate block 9, respectively.
and fit the right edge of the sub printed wiring board 3 into the groove 9b of the block 9 at the intermediate position and the groove of the opposite block 8 (not shown), respectively. At this time, the right edge of the main printed wiring board 1 is located on the lower surface of the blocks 8 and 9. The main printed wiring board 1 has three locations on its right edge, blocks 8,
9 is fixed with screws to the lower surface of the sub printed wiring board 2,
3, the grooves 8a, whose right side edges correspond to each other,
It will be held at 9a, 9b, etc. As described above, in the electronic device according to the present invention, the number of spacers for forming the hierarchical structure of the printed wiring board is halved compared to the conventional example. however,
In the example device, there are two sub-printed wiring boards,
It is necessary to take into consideration that there is only one in the conventional device. Moreover, the installation of this hierarchical structure to the front panel side is simple as the main printed wiring board is fixed with screws, but the secondary printed wiring board is inserted into the groove of the corresponding block and held. , and the number of man-hours is also reduced. moreover,
Reducing the number of spacers means that the effective area of each of the main and sub printed wiring boards becomes correspondingly larger.

[Effect of the idea]

As explained above, in this invention, the main printed wiring board has one side edge fixed to the front plate side, and the sub printed wiring board has the same side edge fixed to the front plate side. Therefore, when attaching the hierarchical structure consisting of the main printed wiring board and the sub printed wiring board to the front board, the main work is to fix the main printed wiring board at the side edges. . Therefore, this invention has the following superior effects compared to conventional techniques. (1) The work of attaching the hierarchical structure to the front panel becomes easier and the number of man-hours can be reduced. (2) Since some of the members for forming the hierarchical structure of the main printed wiring board and the sub printed wiring board can be omitted, the number of required parts can be reduced accordingly.
Moreover, the number of assembly steps can be reduced. (3) In relation to the previous item, the effective area (mountable area) of the main and sub-printed wiring boards becomes wider.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the main part of the embodiment according to the present invention, Fig. 2 is a side sectional view of the main part, Fig. 3 is a perspective view of the main part of the conventional example, and Fig. 4 is a side sectional view of the main part. It is a diagram. Explanation of symbols: 1... Main printed wiring board, 2, 3... Sub printed wiring board, 4, 5... Spacer, 7... Front plate, 8, 9... Block.

Claims (1)

[Claims for Utility Model Registration] A front plate to which a hierarchical structure consisting of one main printed wiring board and at least one sub printed wiring board is attached is configured such that the hierarchical structure can be taken in and out of the housing part. In the device that is attached to and detached from the storage section, the main printed wiring board is fixed at its edge on the front plate side to a pedestal that projects from the back side of the front plate, and the sub printed wiring board is fixed to the pedestal that projects from the back side of the front plate. The edge on the front plate side is inserted and held in the groove provided in the pedestal,
An electronic device characterized in that the main printed wiring board and the sub printed wiring board are hierarchically connected via a spacing bar at an edge opposite to the front board.