JPH0438554Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a mounting device for a printed circuit board in electronic equipment, and is particularly used to increase the functionality of information equipment such as personal computers, for example, to increase memory capacity. The present invention relates to a mounting mechanism for a PC board.

(B) Prior Art Generally, in electronic devices, a large number of printed circuit boards and connectors are used simply to accommodate the necessary number of boards in the main body of the device and to electrically connect predetermined points.

In this case, when the main body of the electronic device is equipped with the basic functions and an optional function is used as an additional function expansion board, such as a personal computer, a connector is connected to the main printed circuit board installed in the computer in advance. Attachment: If necessary, connect an additional printed circuit board as the expansion printed circuit board to the connector.

Regarding this technology, as an example, Utility Model Publication No. 51-36679
No. 4,009,300 discloses a configuration in which a metal plate is used to elastically hold a board socket when fixing it to a mounting board.

Furthermore, as shown in Japanese Utility Model Application Publication No. 60-104927, a structure has been proposed in which when an option board is attached to a basic board, an option board fixing metal fitting is used to sandwich the metal fitting between the basic board and the case.

(c) Problems to be solved by the invention In the conventional example, the former does not require screws as fixing devices, but it requires two metal plates to fix one printed circuit board, while the latter requires fixing metal plates. At least two metal fittings and fixing screws are required for each option board, and both have the disadvantage of not only being complicated in structure but also having a large number of parts.

In addition, in the personal computer, when simply adding a printed circuit board as in the former case, simply connecting the additional printed circuit board to the connector provided on the main printed circuit board does not result in the connector side of the additional printed circuit board being opposite to the connector side. The end of the holder is a free end, which causes chatter (vibration from other vibrating objects) of the additional printed circuit board, which is an inconvenient product. This is caused by, for example, vibration caused by the rotation of a cooling fan for heat dissipation, and it is necessary to take measures to prevent vibration at both ends of the substrate. Therefore, this idea is
This provides a novel configuration that eliminates the aforementioned drawbacks.

(d) Means for Solving the Problems The present invention consists of a metal chassis provided in an electronic device, and a main body fixed to the chassis, which has a connecting means to be connected to a predetermined location of an additional printed circuit board. a printed circuit board, a mounting metal whose one end is inserted into a metal fitting insertion hole provided in the chassis and whose other end is fixed to the chassis, and a mounting metal whose edge is inserted into the metal fitting insertion hole and whose end It consists of a pressure spring that presses the one end of the metal fitting, and when the additional printed circuit board is used for the main printed circuit board, the ground terminal of the additional printed circuit board is connected to the mounting metal fitting, and the mounting metal fitting is pressed against the one end. Electrical connection is made to the chassis via a spring, and when the additional printed circuit board is not used, one end of the mounting fitting is fixed to the chassis and the other end is biased by the pressing spring.

(E) Effect In the printed circuit board mounting device of the present invention, the mounting bracket is fixed to the additional printed circuit board, one end of which is pressed by a pressing spring provided on the chassis, and the other end is fixed to the chassis with a screw, etc. It has a structure in which one end of the mounting bracket is pressed by a pressing spring whose end edge is inserted into the bracket insertion hole of the chassis, and the other end is fixed by a fixture in the same manner as described above, One end of the mounting bracket eliminates the need for screws and can be electrically connected to the chassis, providing both mechanical fixation and electrical connection despite having fewer screwed locations.

(F) Embodiments The present invention will be explained with reference to the drawings. Fig. 1 shows an exploded perspective view of a printed circuit board mounting device of the present invention, and Fig. 2 shows a perspective view of the same device, with some parts missing.

In the drawing, 1 is an exterior cabinet, 2 is a metal chassis provided in the cabinet, 3 is a main printed circuit board that is attached to the chassis and has a ground terminal, and 4 is a connection means that is attached to the main printed circuit board. An additional printed circuit board 5 can be connected to the connector as required. Reference numeral 6 denotes a mounting bracket that is attached to the edge of the additional printed circuit board opposite to the side that is connected to the connector, and is connected to the ground terminal of the additional printed circuit board, and 7 is the mounting bracket provided on the chassis. 8 is an insertion hole for inserting a metal fitting, the pressing tongue piece 9 is inserted into the insertion hole for the metal fitting, and a pressing spring is fixed to the chassis; 10 is a screw for fixing the pressing spring to the chassis; show.

Next, to explain how to install the printed circuit board mounting device of the present invention, first, the main printed circuit board 3
is fixed to the fixed leg 11 of the chassis 2 with a screw 12.

The chassis 2 includes a tongue piece 9 of a pressing spring 8,
The pressing spring 8 is integrated with the chassis 2 by inserting the springs 9, 9 into the metal fitting insertion holes 7, 7, 7 and fixing them with the screws 10, 10.

Therefore, when connecting an additional printed circuit board 5 for an extended function, for example, to increase memory capacity, to the connector 4 provided on the main printed circuit board 3, the connecting portion 13 of the additional printed circuit board 5 is connected to the connector 4. A mounting bracket 6 is mechanically fixed to the additional printed circuit board 5 in advance, and a ground terminal on the board is electrically connected to the mounting bracket 6, as shown in FIG. The insertion end 14 of the mounting fitting 6 is inserted into the mounting hole 7, and the fixed end 15 is fixed to the fixed part 17 of the chassis 2 with the screw 16.

As a result, even if the ground terminal of the main printed circuit board 3 is not connected to the chassis 2, if the ground terminal of the additional printed circuit board 5 is mutually connected, the mounting bracket can be used as described above. 6
is soldered to the copper foil that will serve as the ground terminal of the additional printed circuit board 5. However, the ground terminal can be connected only by the above-mentioned installation work, and the opening 17 of the chassis 2 can be formed using the mounting bracket 6. Covered.

On the other hand, when the connector 4 of the main printed circuit board 3 does not require the additional printed circuit board 5 as described above, the mounting bracket 6 is provided with holes 17, 17, and 17 (see the drawing for partially covering the openings). (For the sake of simplicity, the mounting hardware is omitted.) As shown in FIG. 7, etc., and fix it with screws 10, 10, etc., the opening 1
7, 17, 17 are covered by the mounting fittings.

As described above, once the insertion ends of the mounting fittings are inserted into the mounting holes, the pressing springs can press the insertion ends in the direction of the arrow shown in FIGS. 2 and 3.

Figure 4 is an enlarged sectional view of the main part of Figure 3 mentioned above, and Figure 5
FIG. 2 is a plan view of main parts showing a state before attachment of the attachment fittings.

(G) Effects of the invention According to the printed circuit board mounting device of the present invention, when the mounting bracket is fixed to the additional printed circuit board,
When the mounting bracket is attached to the chassis with screws, electrical contact between the additional mounting bracket and the chassis becomes possible, and the ground terminals of the additional printed circuit board, including the main printed circuit board, are connected to each other through the mounting bracket and the pressing spring. to ensure grounding to the chassis.

Further, since the additional printed circuit board is securely held fixed to the chassis,
For example, even if vibrations caused by the rotation of a heat dissipation fan in an electronic device or vibrations caused by other vibration sources are transmitted to the additional printed circuit board via the main printed circuit board, the insertion end of the additional printed circuit board is It is held under pressure, and the other end is fixed to the chassis with a screw, so that the influence of the vibration can be completely eliminated.

When the additional printed circuit board is not used, if the mounting bracket is installed using the same procedure, both ends of the mounting bracket will be securely held against the chassis as described above, and the mounting bracket can be simply attached with screws. Compared to fixing only the upper part to the chassis, problems such as chatter caused by vibration can be eliminated.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing the printed circuit board mounting device of the present invention, FIGS. 2 and 3 are sectional views of the main parts of the device, FIG. 4 is an enlarged sectional view of the main parts of the device, and FIG.
The figure shows a plan view of the main parts of the device. 2... Chassis, 3... Main printed circuit board, 4...
...Connector, 5...Additional printed circuit board, 6...
Mounting bracket, 7...insertion hole, 8...pressing spring.

Claims (1)

[Scope of utility model registration request] It has a metal chassis provided in the electronic device and a connection means that is connected to a predetermined location of an additional printed circuit board, and the main printed circuit board fixed to the chassis and the insertion hole provided in the chassis are connected to each other. The main printed circuit board includes a mounting bracket having one end inserted therein and the other end fixed to the chassis, and a pressing spring having an edge inserted into the insertion hole and pressing the one end of the mounting bracket. When the additional printed circuit board is combined, the grounding terminal of the additional printed circuit board is connected to the mounting bracket, the mounting bracket is electrically connected to the chassis via the pressing spring, and the additional printed circuit board is connected to the chassis. A mounting device for a printed circuit board, characterized in that when the printed circuit board is not in use, one end of the mounting fitting is fixed to the chassis, and the other end is biased by the pressing spring.