JPH0864272A - Connector pin connector apparatus and assembling method therefor - Google Patents

Abstract

PURPOSE: To provide a connector pin connecting apparatus by which connecting work can be carried out easily and the contact resistance can be sufficiently lowered even if the thickness of a contact conductor part is thin and provide an assembling method therefor. CONSTITUTION: A contact conductor part 3 formed by rising up of the sharp tip projected part 122 of a connector pin 12 on the main face of a circuit substrate 2 is inserted into the main face of the circuit substrate 2 by cutting in almost parallel to the substrate to electrically connect both the conductor part 3 and the substrate to each other. In this way, the connector pin 12 can be brought into contact with the contact conductor part 3 simultaneously with the installation of the circuit substrate 2 in a connector housing 10 only by mutually displacing the circuit substrate 2 to the connector housing 10 in almost parallel to the main face of the circuit substrate 2 and thus electrically connecting work can be carried out easily. Moreover, even if the thickness of the contact conductor part 3 is thin, the tip projected part 122 can bite therein sufficiently.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector pin connecting device for fixing a circuit board to a connector and electrically connecting a connector pin and a contact conductor portion on the circuit board, and an assembling method thereof.

[0002]

2. Description of the Related Art FIG. 7 shows an example of a conventional structure for mounting connector pins on a circuit board. The connector 1 includes a connector housing 10 formed of a resin-molded block and connector pins 12 fixed to the connector housing 10. The connector 1 is fixed to a circuit board 2. The connector pin 12 is wire-bonded to the contact conductor portion 3 on the circuit board 2.

Another example of a conventional structure for attaching connector pins to a circuit board is shown in FIG. In this example, instead of wire bonding in FIG. 7, both ends of the lead wire 15 are individually welded to the contact conductor portion 3 and the connector pin 12.
Another example of a conventional structure for attaching connector pins to a circuit board is shown in FIG. In this example, instead of the wire bonding shown in FIG. 7, the bending elasticity of the connector pin 12 is used to press the tip end portion of the connector pin 12 against the contact conductor portion 3.

In Japanese Utility Model Application Laid-Open No. 5-82078, one end of a coil spring is welded to a contact conductor portion (contact conductor portion) on a circuit board, and a rod-shaped connector pin is pushed into the coil spring from above to generate electric power. Proposes to make a connection. Further, in Japanese Patent Laid-Open No. 63-34869, a needle-like protrusion is provided at the tip of the connector pin, and the protrusion is formed on the circuit board by moving the circuit board in the protrusion direction of the connector pin with respect to the connector pin. A structure has been proposed in which the contact conductor is pierced to make an electrical contact between the two.

[0005]

However, in the connection method of FIGS. 7 and 8 described above, wire bonding or welding (including brazing and soldering) is required, which complicates the process and increases the processing cost. . Further, in the connection method of FIG. 9, since the flat surface of the connector pin is simply brought close to the flat surface of the contact conductor portion and pressed,
There is a problem in that the contact resistance between the connector pin and the contact conductor cannot be sufficiently reduced due to the presence of the oxide film and the minute irregularities existing in these contact portions. Further, when the bending elasticity of the connector pin is increased to reduce the contact resistance, it is necessary to increase the strength of each part, and also it is necessary to increase the adhesive strength between the connector housing 10 and the circuit board 2.

On the other hand, in the connection method using the coil spring of the former publication, the coil spring has a special shape, and the coil is mounted on the board in a normal component mounting machine that picks up components and disposes them at a predetermined position on the circuit board. Due to the difficulty of automatic mounting, the problem arises that a large number of coil springs must be arranged manually or a special dedicated mounting system must be devised.

Further, in the connection method in which the needle-like protrusions of the latter publication are pierced into the contact conductor portion on the side surface of the circuit board, the needle-like protrusions are pierced deeply with a low contact resistance unless the contact conductor portion is formed sufficiently thick. There is a disadvantage that the connection cannot be made and a special contact conductor portion structure for forming such a thick contact conductor portion is required. The present invention has been made in view of the above problems, and provides a connector connection board and a connection method thereof, in which the steps are simple and the contact resistance can be sufficiently reduced even when the contact conductor portion is thin. That is the purpose.

[0008]

SUMMARY OF THE INVENTION A connector pin connecting device of the present invention comprises a circuit board having a contact conductor portion formed of a conductor layer raised on a main surface, and a connector housing fixed to the circuit board. A connector pin fixed to the connector housing, the connector pin having an inner end portion having a sharp tip projection and an elastic support portion that imparts elasticity to the tip projection, and the tip projection of the connector pin is a main portion of the circuit board. It is characterized in that the contact conductor portion is cut and pushed in a direction substantially parallel to the surface.

In the method for assembling the connector pin connecting device of the present invention, the connector pin fixed to the connector housing is composed of a tip projection having a sharp inner end and an elastic supporting portion for imparting elasticity to the tip projection. By the tip protrusion, while cutting the contact conductor portion formed on the main surface of the circuit board in a substantially parallel manner with the main surface of the circuit board, the connector housing and the circuit board are set at predetermined positions, It is characterized by fixing.

[0010]

According to the connector pin connecting device or the method of assembling the connector pin of the present invention, the contact conductor portion formed by the pointed projection of the connector pin rising on the main surface of the circuit board is provided. The electric connection between the two is made by cutting and pushing in substantially parallel to the main surface.

With this configuration, the circuit board can be mounted on the connector housing and the connector pins can be brought into contact with the contact conductor portion only by relatively displacing the circuit board with respect to the connector housing substantially in parallel with the main surface of the circuit board. , Connection work becomes easy. Further, since the tip projections of the connector pins are displaced substantially parallel to the main surface of the circuit board, the contact conductor portion is cut in the surface direction, and even if the contact conductor portion is thin, it is sufficient. It is possible to make a cut, and as a result, sufficient surface contact between the exposed surface of the new and wide contact conductor portion and the tip protrusion portion can be achieved, and the contact resistance can be sufficiently reduced.

[0012]

【Example】

(Embodiment 1) FIG. 1 is a longitudinal sectional view of an essential part showing an example of a connector pin connecting device and an assembling method thereof according to the present invention, and FIG. 2 (a) shows the tip of a connector pin 12 as a contact conductor part. FIG. 2B is a schematic enlarged side view of an essential part showing a state before cutting, and FIG. 2B is a schematic enlarged side view of an essential part showing a state after the tip projection of the connector pin 12 cuts into the contact conductor part.

The connector housing 10 formed by resin molding has a recess 11 at the right end opening.
One end of each of the plurality of connector pins 12 is projected.
The central portion of each connector pin 12 is the connector housing 10.
, And the inner ends of the connector pins 12 project from the connector housing 10 toward the circuit board 2. The connector pin 12 is made of a slender plate-shaped brass plate or phosphor bronze plate, and the inner end portion of the connector pin 12 projects downward in the figure, bends rightward, and then elastically extends downward again obliquely. Part 121 and this elastic support part 12
1 and a tip projection 122 formed of a tip.

The lower end opening of the case 1 is closed by a base 13 made of an aluminum flat plate to form a sealed space inside. More specifically, the peripheral edge of the base 13 is bonded to the peripheral edge of the case 1 surrounding the lower end opening. A large number of electronic circuit elements (not shown) are mounted and wired on the circuit board 2. Further, a contact conductor portion (so-called contact conductor portion) 3 is formed on the upper surface of the right end portion of the circuit board 2 by thick film printing or plating. The material of the contact conductor portion 3 is Ag, Ni, Cu or an alloy thereof. Alternatively, solder may be used.

In this embodiment, when the circuit board 2 is displaced to the right in FIG. 1 and set in a predetermined position of the connector housing 10, the tip projection 122 of the connector pin 12 causes the contact conductor 3 to contact the circuit board 2. It is incised and in close contact with the main surface of the sheet (see FIG. 2). The tip protrusion 122 is strongly pressed against the contact conductor portion 3 by the elastic repulsive force of the elastic support portion 121 of the connector pin 12, and as a result, the tip protrusion portion 122 can widely contact the new surface of the contact conductor portion 3, The contact resistance can be reduced. (Embodiment 2) Another embodiment will be described with reference to FIG.

The connector housing 10 constitutes a part of the resin case 1, and the aluminum base plate 1 to which the circuit board 2 is adhered closes the lower end opening of the resin case 1 to form a hermetically sealed case structure. In this embodiment, the circuit board 2
The displacement direction of the connector pin 12 is the same as that in FIG.
Have different shapes. That is, the elastic support portion 121 projects from the connector housing 10 to the left in the figure, bends downward, and then projects to the left again to form a tip projection 122 having a sharp tip.

In this way, the lower surface of the tip projection 122 can be brought into close contact with the cut upper surface of the tip projection 3,
The contact area can be further increased. (Other Embodiment) Another embodiment will be described with reference to FIGS. 4 and 5 show a planar shape of the tip projection 122, and the tip projection 122 of FIG. 4 has one tip,
The tip projection 122 of FIG. 5 has three tips.

The tip projection of FIG. 6 is formed in the shape of a rake.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an essential part showing a connector connection board of the present invention.

FIG. 2 (a) is an enlarged schematic side view showing a state before joining the tip protrusions of FIG. (B) It is an expansion schematic side view which shows the state after joining the front-end | tip protrusion part of FIG.

FIG. 3 is a longitudinal sectional view of a main part showing a connector connection board according to a second embodiment.

FIG. 4 is a plan view showing a tip projection of a connector connection board according to another embodiment.

FIG. 5 is a plan view showing a tip projection of a connector connection board according to another embodiment.

FIG. 6 is a perspective view showing a tip projection of a connector connection board according to another embodiment.

FIG. 7 is a longitudinal sectional view of a main part showing a conventional connector connection board.

FIG. 8 is a longitudinal sectional view of a main part showing a conventional connector connection board.

FIG. 9 is a longitudinal sectional view of a main part showing a conventional connector connection board.

[Explanation of symbols]

10 is a connector housing, 2 is a circuit board, 3 is a contact conductor portion, 12 is a connector pin, 121 is a connector pin 12
The elastic support portion 122 is a tip projection of the connector pin 12.

Claims (2)

[Claims] 1. A circuit board in which a contact conductor portion formed of a conductor layer is formed on a main surface in a raised manner, a connector housing fixed to the circuit board, a tip projection portion having a sharp inner end portion, and the tip projection. A connector pin fixed to the connector housing, the connector pin being formed of an elastic support portion that imparts elasticity to the portion, and the tip projection portion of the connector pin cut into the contact conductor portion in a direction substantially parallel to the main surface of the circuit board. A connector pin connecting device characterized by being pushed in. 2. A main surface of a circuit board by the tip projection of a connector pin fixed to a connector housing, which comprises a tip projection whose inner end is sharp and an elastic support portion which gives elasticity to the tip projection. Connector pin connection characterized by setting the connector housing and the circuit board at a predetermined position and fixing them while cutting the contact conductor portion that is formed above the circuit board substantially in parallel with the main surface of the circuit board. How to assemble the device.