JPH076833A - Pressure-contact connector - Google Patents

Abstract

PURPOSE:To provide a pressure-contact connector, in which contact reliability is improved by carrying out a wiping action without increasing a contact pressure excessively. CONSTITUTION:A guide pin 11 is projected on the side face of a connector pin 10, while a spiral guide groove 12 is cut on the wall face of a through hole 5 for storage of a pin of a connector housing 4. A guide pin 11 of the connector pin 10 is engaged with the spiral guide groove 12. When the connector pin 10 is pushed into the through hole 5 for storage of a pin by the installation of a printed wiring board, the guide pin 11 is guided by the guide groove 12 to be rotated. Therefore, the connector pin 10 is pushed into the through hole 5 for storage of a pin with rotating, so that a wiping action is carried out and an oxide coating in a contact boundary part between the connector pin 10 and a connection pad of the printed wiring board can be removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure contact connector for connecting a pair of printed wiring boards to each other by pressing connector pins against the connection pads of the pair of printed wiring boards.

[0002]

2. Description of the Related Art Generally, printed wiring boards are connected by soldering. However, since soldering requires a space for that, high-density mounting cannot be realized. Therefore, in order to realize high-density mounting, various connectors for connecting printed wiring boards without soldering have been developed.

FIG. 5 shows a press contact connector which is a kind of such a connector for a printed wiring board. A pair of printed wiring boards 1, 1 have a large number of connection pads 2 arranged at a predetermined pitch. The press contact connector 3 is provided between the printed wiring boards 1 and 1 to connect the connection pads 2 of the printed wiring boards 1 and 1 to each other. As shown in FIG. 6, the press-connecting connector 3 includes a connector housing 4, a through hole 5 for accommodating a pin formed in the connector housing 4, and a pair of connectors accommodated in the through hole 5 for accommodating the pin. It is composed of pins 6 and a conductive spring 7 arranged between these connector pins 6 and 6. The spring 7 electrically connects the connector pins 6, 6 to each other, and biases the connector pins 6, 6 such that the tips thereof project from the front surface 4a and the rear surface 4b of the connector housing 4, respectively.

As shown in FIG. 5, when a pair of printed wiring boards 1 and 1 are attached to the front and back surfaces of the connector housing 4 by bolts 8 and 8 and nuts 9 and 9, respectively.
As shown in FIG. 7, the connection pads 2 of the printed wiring boards 1 and 1
Presses the connector pins 6 and 6, and pushes these connector pins 6 and 6 into the through holes 5 for accommodating the pins against the biasing force of the spring 7. This allows the connector pins 6,
6 is always in pressure contact with the connection pads 2 of the printed wiring boards 1 and 1 by the urging force of the spring 7 to surely electrically connect the upper and lower connection pads 2.

[0005]

However, in the above-described conventional press-connecting connector, the connector pin is only press-contacted vertically to the connection pad of the printed wiring board, and the connector pin does not move relative to the surface direction of the connection pad. Therefore, the insulating oxide film formed at the contact boundary between the connector pin and the connection pad cannot be removed, that is, there is no "wiping" operation, and the contact reliability of the connector pin is poor.

In order to improve the contact reliability, it is necessary to increase the urging force of the spring to increase the contact pressure. However, since the contact pressure is inversely proportional to the life of insertion and removal of the connector, excessive increase of the contact pressure causes another problem that the life of the connector is shortened.
Therefore, an object of the present invention is to provide a press-connecting connector that improves wiping reliability by performing a wiping operation without excessively increasing the contact pressure.

[0007]

In order to achieve this object, the present invention provides a connector housing having a through hole for receiving a pin, and a pair of connector pins accommodated in the through hole for receiving a pin. A pair of printed wiring boards arranged in the through holes for accommodating the pins and biasing the pair of connector pins so as to project from the front surface and the back surface of the connector housing, respectively; In the pressure contact connector in which the connector pin is pushed into the through hole for receiving the pin against the urging force of the spring by the connection pad of the printed wiring board, the through hole for receiving the pin is inserted. A guide groove formed on the wall surface of the hole; and a guide pin protruding from the connector pin and engaged with the guide groove. De groove is to the connector pin to rotate the connector Pimpin when pushed into the through hole for the pin receiving, characterized by guiding the guide pin.

In this structure, the guide pin is
It is preferable that at least two connector pins are provided on the side surface of the connector pin at intervals of approximately 180 °. Further, it is desirable that the tip of the connector pin be eccentric from the center of rotation of the connector pin.

[0009]

When the printed wiring boards are attached to the front surface and the back surface of the connector housing, respectively, the connector pins are pushed into the through holes for accommodating the pins against the biasing force of the spring.
At this time, the guide pin rotates by being guided by the guide groove, so that the connector pin also rotates. Since the connector pin is thus rotated in contact with the connection pad, the wiping operation is performed by the rotation of the connector pin, and the insulator at the contact boundary can be removed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a press-connecting connector according to the present invention will be described below with reference to FIGS. 1 to 4 in which the same parts as those in FIGS. 1 (a) and (b)
In each of the pair of connector pins 10 and 10, a pair of guide pins 11 and 11 are projectingly provided on the side surface thereof, and the guide pins 11 and 11 are separated from each other by 180 °. A conductive spring 7 is interposed between the connector pins 10 and 10, and the spring 7 is provided on both connector pins 1.
0 and 10 are electrically connected to each other, and both connector pins 10 and 10 are urged in a direction in which they are separated from each other.
The through holes 5 for accommodating the pins of the connector housing 4 are provided with spiral guide grooves 12, 12 on the wall surface.

As shown in FIG. 2, connector pins 10 and 10 and a spring 7 are accommodated in the through hole 5 for accommodating the pins, and the guide pins 11 and 11 shown by hatching are spiral guides. It is engaged with the grooves 12, 12. Guide groove 12,
The guide pins 11 and 1 are provided so that when the connector pins 10 and 10 are slid in the vertical direction, that is, in the axial direction of the through hole 5, the connector pins 10 and 10 are rotated along with the sliding.
Guide 1 Other configurations are the same as those in FIGS.

Next, the operation of this embodiment will be described. Figure 2
3, the tips of the connector pins 10 and 10 project from the front surface and the back surface of the connector housing 4 by the urging force of the spring 7. In this state, when the printed wiring boards 1 and 1 shown in FIG. 5 are attached to the front surface and the back surface of the connector housing 4, respectively, the connector pins of the printed wiring boards 1 and 1 cause the connector pins 10 and 10 to move to the spring 7.
It is slid and pushed into the through hole 5 for accommodating the pin against the urging force of the pin. At this time, the guide pins 11 and 11 are guided by the guide grooves 12 and 12 in the direction of arrow A, whereby the connector pins 10 and 10 are rotated as they slide. Since the connector pins 10 and 10 are rotated while being pressed against the connection pads, a wiping operation is performed by this rotation, and the insulator at the contact boundary between the connector pins 10 and 10 and the connection pads can be removed. .

FIG. 4 shows a second embodiment of the present invention in which the tips 10a, 10a of the connector pins 10, 10 are eccentric from the center of rotation (axial center) of the connector pin.
When the connector pins 10 and 10 are rotated by the guide grooves 12 and 12 due to such eccentricity, the connector pin tips 10a and 10a rotate so as to draw an arc with respect to the connection pad of the printed wiring board. The effect is further enhanced, and the contact reliability of the connector pins 10 and 10 is improved.

[0014]

As is apparent from the above description, according to the present invention, when the connector pin is pushed into the through hole for receiving the pin against the biasing force of the spring by mounting the printed wiring board, Since the guide pin and the guide groove are rotated at the same time, the wiping operation is performed, the insulator at the contact boundary portion can be removed, and the contact reliability of the connector pin can be improved.

[Brief description of drawings]

FIG. 1A is a perspective view showing a connector pin and a spring of a first embodiment of a press-connecting connector according to the present invention.
(B) is sectional drawing which showed the connector housing of 1st Example.

FIG. 2 is a perspective view showing a state in which the tip of the connector pin of the first embodiment projects from a through hole for accommodating the pin of the connector housing.

FIG. 3 is a perspective view showing a state in which the tips of the connector pins of the first embodiment are pushed into the through holes for accommodating the pins of the connector housing.

FIG. 4 is a perspective view showing connector pins of a second embodiment of the press-connecting connector according to the present invention.

FIG. 5 is an exploded perspective view showing the overall configuration of a conventional pressure contact connector.

FIG. 6 is a cross-sectional view showing a state before the printed wiring board is attached to the connector housing of the conventional pressure contact connector.

FIG. 7 is a cross-sectional view showing a state in which a printed wiring board is attached to a connector housing of a conventional pressure contact connector.

[Explanation of symbols]

 1 printed wiring board 2 connection pad 3 pressure contact connector 4 connector housing 5 through hole for accommodating pins 7 spring 10 connector pin 11 guide pin 12 guide groove

Claims (3)

[Claims] 1. A connector housing having a through hole for accommodating a pin, a pair of connector pins accommodated in the through hole for accommodating the pin, and a pair of connectors arranged in the through hole for accommodating the pin. A connector for connecting the printed wiring boards when a pair of printed wiring boards are mounted on the front and rear surfaces of the connector housing, respectively. In a press contact connector in which the pad pushes the connector pin against the urging force of the spring into the through hole for receiving the pin, a guide groove formed in a wall surface of the through hole for receiving the pin and the connector pin And a guide pin engaged with the guide groove, the connector pin having a through hole for accommodating the pin. To rotate the connector Pimpin when pressed, insulation displacement connector, characterized in that the guiding the guide pin. 2. The press-connecting connector according to claim 1, wherein at least two guide pins are provided on a side surface of the connector pin at intervals of about 180 °. 3. The press-connecting connector according to claim 1, wherein the tip of the connector pin is eccentric from the center of rotation of the connector pin.