JPH1131890A - Circuit board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost of a circuit board by eliminating the need of any connector, by exposing one side face of an external connecting terminal section constituting a wiring circuit pattern on the end section side of a circuit board. SOLUTION: A required wiring pattern 2 is formed on a circuit board 1 by punching a metallic sheet, and the board 1 is molded with an insulating resin 3. On a circuit board to be connected, a step section is provided at the end section of the board at a height which is about a half of the thickness of the board, and the surface of the external connecting terminals 6a of a wiring circuit pattern are exposed. The circuit board to be connected is provided with contact sections having spring properties, by cutting and raising the wiring circuit pattern on the opposite side of the insulating resin by means of a means, such as the press working, etc. When the two circuit boards are connected to each other, in addition, the step sections of both circuit boards are oppositely faced to each other, both circuit boards are connected to each other by aligning positioning holes 9 of both circuit boards with each other by using check pins, and the two circuit boards are electrically connected to each other by putting the contact sections having spring properties on the exposed sections 6a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a circuit board formed by molding a metal plate on which a wiring circuit pattern is formed with an insulating resin, and an interconnection structure thereof.

[0002]

2. Description of the Related Art Conventionally, as a method of interconnecting circuit boards, the method shown in FIG. 5 is generally used. In FIG. 5, 5
1a and 51b are circuit boards, 52 is a connector plug for connecting the board to the board, and 53 is a connector socket.
A connector plug 52 is mounted on the circuit board 51a,
The socket 53 of the connector is mounted on the circuit board 51b. Then, the plug 52 is fitted into the socket 53, and the circuit board 51a and the circuit board 51b are electrically connected.

[0003]

In the above-mentioned conventional method of connecting circuit boards, since the connection is made as described above, a connector is required and the cost is high.

[0004]

In order to solve the above-mentioned problems, a circuit board according to the present invention is a circuit board formed by resin-molding a wiring circuit pattern made of a metal plate. One side of the terminal is exposed at the end of the circuit board.

According to the above configuration, a connector is not required for connection between circuit boards, and cost can be reduced. In addition, the number of connection components is reduced, and the connection reliability is improved.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first invention of the present invention relates to a circuit board formed by molding a metal plate on which a wiring circuit pattern is formed with an insulating resin, at a position separated by a predetermined distance from a side end of the circuit board. Has at least one positioning hole,
An end portion of the circuit board is formed in a stepped shape at a height of half the thickness of the circuit board, and the surface of the molded wiring circuit pattern is exposed. When connecting, eliminates the need for connectors,
Since the cost can be reduced and the number of connection parts is reduced, the connection reliability is improved.

Further, according to a second aspect of the present invention, in a circuit board formed by molding a metal plate on which a wiring circuit pattern is formed with an insulating resin, at least one positioning member is positioned at a predetermined distance from a side end of the circuit board. A circuit board having a hole, the end of the circuit board being stepped at a height of half the thickness of the circuit board, and exposing the molded wiring circuit pattern surface; and an end of the circuit board. The exposed portion of the wiring circuit pattern is cut and cut on the opposite side of the insulating resin layer, and another circuit board provided with a contact portion having spring properties is opposed to an end of the circuit board. And a circuit board connection method characterized in that the circuit boards are connected to each other.When connecting the circuit boards, a connector is not required, and cost can be reduced. Since connection parts decreases, the connection reliability is improved.

Further, a third aspect of the present invention relates to a circuit board formed by molding a metal plate on which a wiring circuit pattern is formed with an insulating resin, wherein at least one positioning member is positioned at a predetermined distance from a side end of the circuit board. Having a hole, the end of the circuit board is stepped at a height position of the circuit board thickness, the circuit board exposing the surface of the molded wiring circuit pattern, and the end of the circuit board The exposed wiring circuit pattern is cut and cut on the opposite side of the insulating resin layer, and another circuit board provided with a contact portion having a spring property is opposed to each other, and the ends of the circuit board are overlapped. At least 2 using the combined circuit board connection method
A circuit board characterized by connecting at least two circuit boards, eliminating the need for a connector when connecting the circuit boards to each other, reducing costs and reducing the number of connection parts, thereby reducing connection reliability. Is improved.

A circuit board according to an embodiment of the present invention will be described below with reference to the drawings.

(Embodiment) FIG. 1A is a plan view of a circuit board according to an embodiment of the present invention, and FIG.
FIG. 2A is a cross-sectional view taken along a cutting line AA, FIG. 2 is a cross-sectional view illustrating a connection structure of a circuit board according to an embodiment of the present invention, and FIG. The perspective view of a connection state is shown. 1 to 3, a circuit board 1 of the present invention is formed by punching a metal plate to form a required wiring circuit pattern 2 and molding the same with an insulating resin 3. The circuit board 1a to be connected is provided with a step 5a at a position about half the thickness of the board at the end 4a of the circuit board, exposing the surface of the external connection terminal 6a of the wiring circuit pattern 2a.

The other circuit board 1b cuts and raises the wiring circuit pattern 2b on the opposite side of the insulating resin 3b layer by means such as press working at the stepped portion 5b of the circuit board end 4b and applies a spring 7b. A contact portion 8b having a property is provided. When these circuit boards are connected, the step portions 5a and 5b of these circuit boards are opposed to each other, the positioning holes 9 are aligned with each other, and the circuit boards are connected by the stopper pins 11.
The contact portion 8b having the spring property and the exposed portion 6a overlap each other to form a connector structure, and the two circuit boards are electrically connected.

Further, as shown in FIG. 4, of the three circuit boards constructed according to the present invention, a step is provided at each end of one circuit board, and the external connection terminal is exposed. Thereby, three circuit boards can be integrally connected.

[0013]

As described above, according to the circuit board of the present invention, a connector is not required for connection between the circuit boards, and the cost can be reduced. In addition, the number of connection components is reduced, and the connection reliability is improved.

[Brief description of the drawings]

FIG. 1A is a plan view of a circuit board according to an embodiment of the present invention. FIG. 1B is a cross-sectional view taken along a line AA in FIG.

FIG. 2 is an essential part cross sectional view showing a process of connecting circuit boards in one embodiment of the present invention.

FIG. 3 is a perspective view after connection of a circuit board in one embodiment of the present invention.

FIG. 4 is a perspective view after connection of a circuit board according to another embodiment of the present invention.

FIG. 5 is a perspective view of a connection state of a conventional circuit board.

[Explanation of symbols]

 1, 1a, 1b Circuit board 2, 2a, 2b Wiring circuit pattern 3, 3a, 3b Insulating resin 4a, 4b Circuit board end 5a, 5b Step 6a External connection terminal 7b Cut and raised 8b Contact 9 Positioning hole 10 Stop pin

Claims (8)

[Claims] 1. A circuit board formed by resin-molding a wiring circuit pattern made of a metal plate, wherein an external connection terminal portion constituting the wiring circuit pattern is exposed at an end of the circuit board. Circuit board. 2. The circuit board according to claim 1, wherein the external connection terminal portions are exposed at both ends of the circuit board. 3. The circuit board according to claim 1, wherein the position of the exposed surface is smaller than the thickness of the circuit board. 4. The circuit board according to claim 3, wherein the position of the exposed surface is approximately half the thickness of the circuit board. 5. The circuit board according to claim 3, wherein a cut-and-raised portion is projected on an exposed side of the external connection terminal portion. 6. The circuit board according to claim 3, wherein at least one positioning hole is provided on the main surface. 7. Two circuit boards according to claim 1 are prepared,
A circuit board, wherein another circuit board is laminated on an end of one circuit board, and the exposed surfaces of the external connection terminals are brought into contact with each other to be electrically connected. 8. Three circuit boards according to claim 1 are prepared,
A circuit board, wherein two other circuit boards are laminated on both ends of one circuit board, and the exposed surfaces of the external connection terminals are brought into contact with each other to be electrically connected.