JPH0644173U - Circuit board connection structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a small and inexpensive electronic device by reducing the area occupied by a plurality of sub circuit boards on the main circuit board and further reducing the man-hours for mounting the spacers for fixing the sub circuit boards. . [Structure] Connectors 8 and 10 for connecting a circuit board 2 and connectors 9 and 11 for connecting a circuit board 3 having a longer fitting length than the connectors are mounted side by side, and the shape of the circuit board 2 is viewed from above to form a connector 9 The circuit board 2 and the circuit board 1 are fixed in such a manner that the side opposite to the side on which the connector 10 is mounted is hooked in the grooves of the spacers 6 and 7 and the side on which the connector 10 is mounted is stepped. It is done by screwing on the lower steps of spacers 4 and 5 processed into
Further, the circuit board 3 and the circuit board 1 are fixed by screwing the spacers 4, 5, 6, 7 and the four corners of the circuit board 3 on the same projection surface of the circuit board 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a connection structure of three or more circuit boards used in electronic devices such as personal computers and printers.

[0002]

[Prior art]

 FIG. 2 shows a structure in which two sub circuit boards 2 and 3 are connected to one main circuit board 1 in a conventional electronic device. As shown in the figure, conventionally, two sub circuit boards are connected on a common plane.

[0003]

[Problems to be solved by the device]

 However, the above structure has a problem that the occupied area on the main circuit board becomes large.

Further, there is a problem that the number of spacers 13 required at this time is as many as four for each sub-circuit board, and the component cost of the spacer as a whole becomes high.

Further, when mounting on a circuit board, it is necessary to screw two upper and lower parts to one spacer, which causes a problem that the number of mounting steps is increased.

The present invention has been conceived in order to solve such a problem, and an object thereof is to reduce the area occupied by a plurality of sub circuit boards on a main circuit board and to fix the sub circuit boards. The purpose of the present invention is to provide a compact and inexpensive electronic device by making the spacer for use into a shape that is easy to manufacture and by reducing the number of steps for attaching the spacer.

[0007]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the circuit board connection structure of the present invention has a short fitting length by changing the fitting length of the connector for connecting the circuit boards when connecting a plurality of circuit boards on the circuit board 1. After connecting the circuit board 2 on which the connector is mounted, the shape of the circuit board 2 is viewed from above so that the circuit board 3 on which the connector having a long fitting length is mounted can be mounted in an overlapping manner. A structure in which a plurality of circuit boards are connected to the same projection surface of the circuit board 1 is formed by exposing the upper circuit board 3 connection connector.

Further, among the four spacers for fixing the circuit board 3, at least two spacers are processed into a step shape, and a screw hole is also provided on the step surface below the spacer, and the circuit board 2 is screwed into the screw hole. The circuit board 2 is fixed by the spacers of the circuit board 3 by stopping.

Further, the side of the circuit board 2 facing the side where the connector is mounted is hung on the groove of the spacer, and the side where the connector is mounted is screwed to the spacer.

[0010]

【Example】

 Each component of FIG. 1 will be described below.

A main circuit board 1 is equipped with various ICs such as a CPU for controlling electronic devices, a connector 8 for connecting to the circuit board 2 and a connector 9 for connecting to the circuit board 3. ing.

Sub circuit boards 2 and 3 may be user option boards such as additional RAM boards or auxiliary boards on which ICs that cannot be mounted on the main circuit board are mounted. And 11 have been implemented. The shape of the circuit board 2 is such that the connector 9 for connecting the circuit board 3 on the circuit board 1 is exposed when viewed from above. The fitting length of the connectors 9 and 11 is set to be longer than the fitting length of the connectors 8 and 10.

Numerals 4, 5, 6, and 7 are spacers for fixing the sub circuit board 2 and fixing the sub circuit board 3. Of these, the spacers 4 and 5 are made of metal sheet metal processed into a staircase shape as shown in the figure. The lower part of the spacer is provided with a screw hole for fixing to the circuit board 1 and a protrusion for preventing rotation. 2 are provided with screw holes for fixing the circuit boards 2 and 3, respectively. The spacers 6 and 7 are also made of metal sheet metal, and like the spacers 4 and 5, a screw hole for fixing the circuit board 1 and a protrusion for preventing rotation are provided on the lower part of the metal plate metal, and the side surface is provided with a circuit. Grooves for fixing the board 2 are provided at the same height as the stepped surfaces of the spacers 4, 5, and one screw hole for fixing the circuit board 3 is provided on the upper surface.

Reference numeral 12 is a screw used for connecting these three circuit boards.

Next, the connection structure of the circuit boards 2 and 3 will be described.

First, the circuit board 2 and the circuit board 1 are fixed by hooking the side of the circuit board 2 opposite to the side where the connector is mounted on the groove of the spacers 6 and 7 and stairing the side where the connector is mounted. The spacers 4 and 5 formed into a strip shape are screwed to the bottom of the spacers, and the circuit board 3 and the circuit board 1 are fixed on the same projection plane of the circuit board 2 by the spacers 4, 5, 5. , 6, 7 and the four corners of the circuit board are fixed with screws.

In this way, the fitting length of the connectors 9 and 11 is set longer than the fitting length of the connectors 8 and 10, and the shape of the circuit board 2 is such that the connector 9 is exposed when viewed from above. As a result, the circuit board 3 can be arranged on the same projection surface of the circuit board 2, so that the area occupied by the plurality of sub circuit boards 2 and 3 on the main circuit board 1 can be reduced.

Further, since the number of spacers to be used is 4, 5, 6, 6 and 7, the number of spacers to be used can be reduced by half as compared with the connection structure of FIG. Furthermore, while the spacer used in Fig. 2 is a metal column manufactured by cutting, the spacers 4, 5, 6, 7 can be press-molded from a single metal sheet metal, so the manufacturing process becomes easier. As a result, the unit price of parts will be much cheaper.

Furthermore, since one side of the circuit board 2 is hooked on the groove of the spacer, the number of screwed points is smaller than in the conventional structure, and the number of mounting steps can be reduced.

Although the embodiment describes three substrates, the structure of the present invention is not limited to this, and can be applied to connection of a plurality of substrates of four or more.

[0021]

[Effect of device]

 As described in the above embodiments, in the circuit board connection structure of the present invention, the fitting length of the connectors 9 and 11 is set longer than the fitting length of the connectors 8 and 10, and the shape of the circuit board 2 is By arranging the connector 9 to be exposed from above, the circuit board 3 can be arranged on the same projection surface of the circuit board 2, so that the area occupied by the plurality of sub circuit boards 2 and 3 on the main circuit board 1 can be reduced. It can be made smaller, and as a result, it greatly contributes to the miniaturization of electronic devices.

Since the number of spacers used is 4, 5, 6, 7, the number of spacers used can be halved. Furthermore, while the spacers used in Fig. 2 are metal columns manufactured by cutting, the spacers 4, 5, 6, 7 can be press-molded from a single metal sheet metal, which simplifies the manufacturing process. As a result, the unit price of parts is significantly reduced.

Further, since one side of the circuit board 2 is hooked on the groove of the spacer, the number of screwed portions is smaller than in the connection structure of FIG. 2, and the number of mounting steps is reduced, so that the assembly cost is reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a circuit board connection structure of the present invention.

FIG. 2 is a perspective view of a conventional circuit board connection structure.

[Explanation of symbols]

 1 Main Circuit Board 2 Sub Circuit Board 3 Sub Circuit Board 4 Spacer 5 Spacer 6 Spacer 7 Spacer 8 Connector 9 Connector 10 Connector 11 Connector 12 Screw 13 Spacer

Claims (3)

[Scope of utility model registration request] 1. When connecting a plurality of circuit boards to a circuit board 1, after changing a fitting length of a connector for connecting circuit boards and connecting a circuit board 2 on which a connector having a short fitting length is mounted. By making the shape of the circuit board 2 into a shape in which the connector for connecting the circuit board 3 on the circuit board 1 is exposed when viewed from above so that the circuit boards 3 on which the connector with a long fitting length is mounted can be mounted in an overlapping manner. A circuit board connection structure characterized in that a plurality of circuit boards are connected to the same projection surface of the circuit board 1. 2. At least two spacers of the four spacers for fixing the circuit board 3 are processed into a step shape, and a screw hole is also provided on a step surface below the spacer, and the circuit board 2 is screwed into the screw hole. 2. The circuit board connection structure according to claim 1, wherein the circuit board 2 is fixed by the spacers of the circuit board 3 by being stopped. 3. The side of the circuit board 2 facing the side where the connector is mounted is hung on the groove of the spacer, and the side where the connector is mounted is screwed to the spacer. Item 2. A circuit board connection structure according to item 2.