JPH03249572A - Device and method for inspecting electrical contact - Google Patents

Abstract

PURPOSE:To simplify a structure and to reduce the cost drastically as compared with a conventional picture processor by discriminating respectively whether an electrical connection is accomplished or not between a gage and electrical contacts to be inspected when the gage is moved for a specified distance. CONSTITUTION:When a gap 1a of the electrical contacts 1 to be inspected is narrower than the minimum allowable value in the specified allowance range, the gage 2 can not be inserted to the gap 1a of contacts 1 to be inspected and the tip of gape 2 is abutted to the tip of contacts 1. The gage 2 is pushed back, and a slider 6 goes back then the back end part of which is detected by a proximity switch 11. On the other hand, when the gap 1a of contacts 1 to be inspected exceeds the maximum allowable value, the gage 2 becomes non-contact state with the contacts 1 to be inspected in the vertical movement of a lifter 12, therefore becomes non-connection state with a connecting terminal 13. Consequently, only when both contacts are electrically connected with the connecting terminal 13, a discriminating means is operated, whereby the dimension of gap 1a is confirmed as normal.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an inspection device and an inspection method for electrical contacts as electronic components, and more specifically, to a method for inspecting whether the gap size of a bifurcated electrical contact is normal or not. The present invention relates to an electrical contact testing device and its testing method.

[Conventional technology]

Generally, a bifurcated electrical contact 1 in a connector as an electronic component has a gap 1a at the tip as shown in FIG. 5, and this gap 1a is as narrow as approximately 1 was. An image processing device is used to check whether it is normal or not.

That is, the above-mentioned image processing device images the bifurcated electrical contact 1 with an imaging device such as a television camera, enlarges and projects this image on the receiver, and displays the right and left ends of the electrical contact 1 on the screen of the receiver. By reading the coordinates in the direction and the vertical direction, it is inspected whether the dimensions of the gap 1a are normal or not.

[Problem to be solved by the invention]

However, since the image processing device requires an image pickup device, a receiver, etc., it has a complicated structure and is expensive, and since the image processing device inspects the electrical contacts 1 one by one by projecting them onto the receiver, There is a problem in that the time required for the inspection becomes long.

Therefore, the present invention has been made in consideration of the above circumstances.
The purpose is to provide an electrical contact testing device and its testing method that uses a mechanical contact method and is inexpensive and shortens the testing time.

[Means to solve the problem]

In order to achieve the above object, the electrical contact testing device according to the present invention has a thickness equal to the minimum allowable gap in the gap tolerance range of the electrical contact to be tested, which is formed in a comb shape and a bifurcated shape. a conductive gauge, a first moving means that fixes this gauge and moves it a predetermined distance in the direction of the opening of the electrical contact to be inspected, and a conductive gauge that is perpendicular to the direction in which the gauge is moved by the first moving means. a second moving means for moving the gauge a predetermined distance in both directions, and a connecting means for electrically connecting the electrical contact to be inspected and each end of the gauge; It is characterized in that when each distance is moved, the success or failure of continuity with the electrical contact to be tested is determined.

When the first moving means moves in a direction opposite to the opening direction of the electrical contact to be inspected, it is preferable that this is detected by a proximity switch.

In addition, the electrical contact testing method according to the present invention uses a conductive gauge formed in a comb shape and a bifurcated shape and whose thickness is set equal to the minimum allowable value in the gap tolerance range of the electrical contact to be tested. The gauge is moved a predetermined distance in the direction of the opening of the electrical contact to be tested, and then the gauge is moved a predetermined distance in both directions perpendicular to the opening direction of the electrical contact to be tested to determine whether continuity is established between the electrical contact to be tested and the gauge. It is characterized by identifying each.

[For production]

In the present invention having the above configuration, when the gap between the electrical contacts to be tested is within a predetermined tolerance range, the gauge is first moved a predetermined distance in the direction of the opening of the electrical contacts to be tested, and then the gauge is moved between the electrical contacts to be tested. When the gauge is moved a predetermined distance in both directions perpendicular to the opening direction 1', the gauge becomes electrically conductive with the electrical contact to be tested in both directions, and the gap is identified as having a normal size. Here, when the gap exceeds the maximum allowable value in the predetermined allowable range,
Or, if the tip of the electrical contact to be inspected is damaged,
At least one contact becomes non-conductive with the gauge.

In addition, if the gap between the electrical contacts to be tested is less than the minimum allowable value within the specified tolerance range, even if you try to move the gauge a certain distance in the direction of the opening, the thickness of the gauge will be reduced to within the allowable gap of the electrical contacts to be tested. Since it is set equal to the minimum allowable value, it is impossible to insert it into the gap.

〔Example〕

Embodiments of the present invention will be described below based on the drawings. Fourth
As shown in the figure and FIG.
A is formed, and the electrical contact 1 to be inspected is located in the housing 3.
It is press-fitted into a plurality of concave portions formed in the plate to provide a large number of poles.

The entire thickness of the gauge 2 is set equal to the minimum allowable gap range of the electrical contact 1 to be inspected, thereby making it impossible to insert the gauge 2 in the direction of the opening into a gap that is less than the minimum allowable value. Since the gauge 2 is formed in a comb-teeth shape, it is possible to test a large number of electrical contacts 1 press-fitted into the housing 3 at one time.

The gauge 2 has electrical conductivity and is fixedly held by a holder 4. The base 5 is movable back and forth toward the electrical contact 1 to be inspected fixed to a jig (not shown), and the base 5 has a first movable member on the top that is also slidable toward the electrical contact 1 to be inspected. A slider 6 is attached as a means. A holder 4 is integrally fixed to this slider 6. Thereby, the gauge 2 can also be moved back and forth toward the electrical contact 1 to be tested by sliding the slider 6 with respect to the base 5.

The base 5 is configured to move back and forth a predetermined distance toward the electrical contact 1 to be inspected by a drive source (not shown).

One end of a spring 7 that urges the slider 6 forward is attached to the rear end of the slider 6, and the other end of the spring 7 is fixed to a support base 8 at the rear of the base 5.
The biasing force of the spring 7 can be changed by adjusting the adjustment twist. Further, the forward limit position of the slider 6 relative to the base 5 can be adjusted by a stopper screw 10 provided on the upper part of the support base 8. A proximity switch 11 is mounted on the support base 8 at a position corresponding to the retreated position of the slider 6.
is located.

The base 5 is attached to a lifter 12 as a second moving means, and the lifter 12 is configured to be able to move the base 5 up and down a predetermined distance by a drive source (not shown).

A connecting terminal 13 as a connecting means is attached to the rear end of the electrical contact 1 to be inspected, a probe is used as the connecting terminal 13, and this probe has a COM for connecting to the rear end of the gauge 2. (common) terminal is provided. Between the connection terminal 13 and the rear end of the gauge 2, there is an ammeter or It is connected to identification means such as buzzers and lamps, and the power supply to operate them.

Next, the operation of this embodiment will be explained.

The vertical position of the gauge 2 is the gap 1 of the electrical contact 1 to be tested.
When the lifter 12 is stopped at the center position of a, if the gap 1a is within the predetermined tolerance range, the base 5
The gauge 2 is advanced to a predetermined position relative to the electrical contact 1 to be tested, and the gauge 2 is inserted into the gap [a] from the direction of the opening of the electrical contact 1 to be tested, as shown in FIG. 3(A).

Next, the lifter 12 moves vertically within the maximum allowable value of the gap 1a. That is, the gauge 2 is moved a predetermined distance in both directions orthogonal to the opening direction of the electrical contact 1 to be inspected. Then, as shown in FIGS. 3(B) and 3(C), the gauge 2 becomes electrically conductive between the electrical contact 1 to be tested and the connecting terminal 13.

Here, if the gap 1a between the electrical contacts 1 to be inspected is less than the minimum allowable value in the predetermined tolerance range, the gauge 2 will not close to the gap 1a between the electrical contacts 1 to be inspected even if the base 5 moves forward to the predetermined position. The tip of the gauge 2 comes into contact with the tip of the electrical contact 1 as shown in FIG. The rear end of the sensor will be detected by the proximity switch 11.

On the other hand, when the gap 1a of the electrical contact 1 to be inspected exceeds the maximum allowable value in the predetermined allowable range,
), when the lifter 12 moves up and down, the gauge 2 and the electrical contact 1 to be tested come out of contact, so that there is no conduction between the connection terminals 13. Further, even if the tip of the electrical contact 1 to be inspected is damaged, one of the contacts becomes non-conductive between the connecting terminals 13, as shown in FIG.

Therefore, only when both contacts are electrically connected between the connecting terminals 13, the identification means such as a buzzer or a lamp is activated, and it is confirmed that the size of the gap 1a between the electrical contacts 1 to be inspected is normal. Also, when the slider 6 retreats, the proximity switch 1
1, it is determined that the gap 1a is too narrow. If there is no continuity between at least one of the contacts and the connecting terminal 13, the gap 1 of the electrical contact 1 to be inspected is
It is determined that a is too wide or that the tip of the electrical contact 1 is damaged.

Here, the timing to check the continuity is to check the beam lid 1.
This will be done at three locations: top dead center and bottom dead center.

As described above, according to the present embodiment, the success or failure of continuity between the gauge 2 and the electrical contact 1 to be tested is determined by the operation of the identification means such as a buzzer or lamp by moving the gauge 2 up and down. It is possible to immediately check whether the dimensions of the gap 1a of the contact 1 are normal or not and whether the tip of the electrical contact 1 is damaged.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made. For example, in the above embodiment, the base 5 is provided on the top of the lifter 12 so as to be movable back and forth, and the slider 6 is movable back and forth via the base 5. Good too. In this case, the support stand 12
is also fixed directly to the lifter 12.

Furthermore, in the above embodiment, the base 5 is
Although the lifter 12 is configured to be movable back and forth, and the lifter 12 is movable up and down, the present invention is not limited to this, and if the opening direction of the electrical contact 1 to be inspected is rotated, for example, by 90 degrees from the above embodiment, the electrical contact inspection can be performed. The apparatus is also configured to be rotated by 90 degrees, and in this case, the lifter 12 is configured to move the gauge 2 in both left and right directions orthogonal to the opening direction of the electrical contact 1 to be tested.

〔Effect of the invention〕

As explained above, according to the electrical contact inspection device according to the present invention, differences in the gap dimensions of the electrical contacts to be inspected can be identified by a mechanical contact method, so compared to conventional image processing devices. This simplifies the structure and significantly reduces costs. Furthermore, since the gauge is formed into a comb-teeth shape, all the number of poles can be inspected at the same time in the case of a large number of poles, and as a result, the inspection time is shorter than that of an image processing device, and the inspection efficiency is significantly improved.

Further, according to the electrical contact testing method according to the present invention, it is possible to easily identify whether the size of the gap between the electrical contacts to be tested is normal or not, so that the testing can be automated.

[Brief explanation of drawings]

Fig. 1 is a side view showing an embodiment of the electrical contact inspection device according to the present invention, Fig. 2 is a front view of the same inspection device, and Figs. 3 (A) to (G) are various types of gauges of the same embodiment. FIG. 4 is a partial perspective view of a gauge corresponding to a multi-pole electrical contact, and FIG. 5 is an enlarged perspective view of the electrical contact to be tested. DESCRIPTION OF SYMBOLS 1... Electric contact to be inspected, 2... Gauge, 4... Holder 5... Base, 6... Slider (first moving means), 7... Spring, 8... Support stand, 9...adjustment screw, 10...stopper screw, 11...proximity switch, 12...-lifter (second moving means) 3...connection terminal (connection means)

Claims (1)

[Claims] 1. A conductive gauge formed in a comb shape and a bifurcated shape and having a thickness set equal to the minimum allowable value in the gap tolerance range of the electrical contact to be inspected, and this gauge is fixed. a first moving means that moves the gauge a predetermined distance in the direction of the opening of the electrical contact to be inspected, and a second moving means that moves the gauge a predetermined distance in both directions perpendicular to the direction in which the gauge is moved by the first moving means. and connecting means for electrically connecting the electrical contacts to be inspected and each end of the gauge, the electrical contact being electrically connected to the electrical contacts to be inspected when each of the gauges is moved a predetermined distance by the second moving means. An electrical contact testing device characterized by determining the success or failure of continuity between the two. 2. The electrical contact testing device according to claim 1, further comprising a proximity switch for detecting that the first moving means moves in a direction opposite to the opening direction of the electrical contact to be tested. 3. Move a conductive gauge formed into a comb tooth shape and bifurcated shape with a thickness set equal to the minimum allowable value in the gap tolerance range of the electrical contact to be tested a predetermined distance in the direction of the opening of the electrical contact to be tested. and then moving the gauge by a predetermined distance in both directions orthogonal to the opening direction of the electrical contact to be tested to identify whether continuity is established between the electrical contact to be tested and the gauge. Contact inspection method. 4. The electrical contact testing method according to claim 3, wherein when the gauge is moved a predetermined distance toward the opening of the electrical contact to be tested, movement in the opposite direction is detected.