JPS6318932Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a connection device for circuit testing to test whether a circuit network made up of various electrical components mounted on a printed circuit board has the intended function. .

A conventional connection device for circuit testing will be explained with reference to FIG. FIGS. 1 and 1 are sectional views of main parts, and 1 is a housing, and 2 is a contact having a spring property whose upper part is bent inward and placed opposite to each other, and is inserted and supported in the housing 1. FIG.

3 is a cam having a locking recess 3a disposed between the contacts 2; 4 is a lever for operating the cam 3; 5 is a printed circuit board.

Therefore, with this configuration, when the lever 4 is lying in the state shown in FIG. 1, the cam 4 does not operate the contacts 2 and the contacts 2 are closed. Therefore, when inserting the printed circuit board 5 between the contacts 2, the lever 4 is held vertically as shown in FIG. The printed circuit board 5 is positioned by accommodating the end of the circuit board 5. In this state, by returning the lever 4 to the state shown in FIG. 1, the distance between the tips of the contacts 2 narrows while the printed circuit board 5 remains as it is, and the tips come into contact with the contact portions of the printed circuit board 5, causing a circuit. Tests can be conducted. Therefore, the printed circuit board 5 is connected to the contact 2.
The printed circuit board 5 can be brought into contact with the contacts 2 without sliding along them.

However, according to such a connection device for circuit testing, the contact 2 is connected to the cam 3 by operating the lever 4.
Because it opens and closes directly through the
Dust caused by wear of the contact 2 and a decrease in the spring force of the contact 2 increase contact resistance, resulting in a decrease in reliability.

In addition, the contact 2 has one shape and a surface contact with a constant pressure for one contact portion of the printed circuit board 5, and the contact resistance is easily influenced by the surface condition of the contact portion of the printed circuit board 5, and furthermore, this device must be replaced. This method has drawbacks such as a large amount of time required, which has been a major problem in improving the reliability and automating testing equipment.

The purpose of this invention is to solve the above-mentioned problems by attaching a contact needle to one part of a printed circuit board by holding a socket.
One or more wires are crimped or press-fitted into the contact portion to provide a connection device for circuit testing that enables reliable electrical continuity regardless of the surface form or various shapes of the contact portion of the printed circuit board. It is characterized by

An embodiment of the present invention will be described below with reference to FIGS. 2 to 5. Fig. 2 is a plan view, Fig. 3 is a front view, Fig. 4 is a partial enlarged sectional plan view of the main part, and Fig. 5 is a perspective view showing the state of the contact needle, 6a, 6b.
are contact needles, and in this embodiment, a case where there are two contact needles will be explained. The contact needles 6a and 6b are inserted into sockets 7 and fixed to an insulating plate 8, respectively.

This insulating plate 8 is further connected to a moving table 10 via a plate 9, and the moving table 10 is held by rollers 11 so as to be able to move smoothly on a guide 12.

A screw shaft 13 is held at both ends by a bracket 15 via bearings 14, and one end thereof is connected to a drive source 17 via a continuator 16. This screw shaft 13 has a screw bearing 18, and this screw bearing 18 is connected to a link 20 rotatably connected by a pivot 19.
It is connected to a bracket 21 via a pivot 22. Reference numeral 5 denotes a printed circuit board, which is held by a guide 29.

As shown in FIG. 4, the contact needles 6a and 6b have a spherical tip for crimping, and the contact needle 6b has a sharp tip for press-fitting. The fixed state is maintained through a spring 23, and the terminals 24,
25 is connected by a conductor 26, further connected to the conductor 2
It is connected to the testing machine main body (not shown) by 7. 28 is a forward/reverse travel end detection sensor.

Next, the operation of the above configuration will be explained.

The power supplied by the drive source 17 is transmitted to the continuator 1
6 to the screw shaft 13, and its rotation moves the screw bearing 18 in the direction of arrow A. The moving force of the screw bearing 18 is transmitted to the bracket 21 via the pivot shaft 22 by the link 20 connected via the pivot shaft 19, thereby causing the plate 9 to move along the guide 12 in the direction of arrow B. Contact needles 6a, 6 held at 8
b comes into contact with the contact portion of the printed circuit board 5, is pressed and press-fitted by the pressurizing spring 23, and the drive source 17 is stopped by the forward/reverse movement end detection sensor 28.

A circuit test is performed in this state.

Next, in order to release the tested printed circuit board 5, the drive source 17 is rotated in the opposite direction, so that the screw shaft 13 is rotated in the opposite direction to that described above, and the screw bearing 18 is rotated in the opposite direction to the arrow A direction. As a result, the plate 9 moves in the direction opposite to the direction of arrow B, and the contact needles 6a, 6b are separated from the printed circuit board 5, and the printed circuit board 5 is released. At this time as well, the drive source 17 is stopped by the forward/reverse travel end detection sensor 28.

Therefore, by adjusting the forward/reverse end detection sensor 28, the pressure adjustment of the contact needles 6a, 6b and the printed circuit board 5 can be performed.
This allows the steel to accommodate changes in plate thickness.

Furthermore, by combining the shapes of the contact needle tips, connections such as crimping and press-fitting can be arbitrarily obtained, and reliable electrical continuity can be created regardless of the shape or surface form of the contact portion of the printed circuit board. can.

According to the present invention having the above structure and operation, in a connection device for circuit testing without insertion resistance of a printed circuit board, it is possible to have a plurality of contact needles, and each of them can be held in a socket. As a result, one or more contact needles can be obtained with arbitrary contact pressure for one contact part of a printed circuit board, and various combinations of contact needles can be used depending on the surface condition and shape of the contact part. Since the contact needle is held in place, the contact needle can be replaced and can be used repeatedly.

Furthermore, since the opening and closing between the contact needles is performed using rotational power, automation is possible, and accurate and rapid circuit testing can be performed.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the main part showing the conventional example, Figure 2
3 is a front view of the same, FIG. 4 is a partially enlarged sectional plan view of the main part, and FIG. 5 is a perspective view showing the state of the contact needle. 5...Printed circuit board, 6a, 6b...Contact needle, 7
...Socket, 8...Insulating plate, 9...Plate,
13... Screw shaft, 17... Drive source, 18...
...screw bearing, 20...link, 23...spring.

Claims (1)

[Scope of utility model registration request] An insulating plate on which one or more contact needles are arranged is movably held by a socket so as to face each other with a predetermined gap, and the insulating plate is moved via a link connected to a screw bearing of a screw shaft connected to a drive source. A connection device for circuit testing, characterized in that the contact needle is crimped or press-fitted into a contact portion of a printed circuit board to connect the contact needle in an electrically conductive state.