JPH08248089A - Connector terminal inspector - Google Patents

Abstract

PURPOSE: To effectively inspect a connector terminal by the snug contact of an inspecting probe with the end of the terminal by providing a terminal receiver which makes a continuity in contact with the end of the connector at the end of the probe. CONSTITUTION: The connector terminal inspector comprises a terminal receiver 1 for the end of a connector terminal at the end of a forward probe in an inspecting probe. For example, a V-shaped groove 11 of the receiver 1 for a male terminal is formed in a rectangular equilateral triangular shape at the bottom from a quadrangular prism (vertical u, lateral v, height w) 2 in the shape in which a triangular prism is cut out with the height equal to the vertical u of the quadrangular prism 2. The cut-out part is symmetrical with respect to the central surface. The end of the terminal is brought into contact with the cutout surface 3. The surface 3 is shaped so that two flat surfaces 3', 3" cross. The upper flat surface 3' and the lower flat surface 3" of the surface 3 are brought into contact with the outer periphery of the terminal. A coiled spring has sufficiently larger spring force than the contact resistance of the terminal with a connector housing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector terminal inspection tool used for inspecting the insertion state and conduction state of a terminal with respect to a connector.

[0002]

2. Description of the Related Art FIGS. 5 to 7 show a conventional connector terminal inspection tool. This connector terminal inspection tool A is shown in FIG.
As shown in FIG. 4, a receiving portion 22 for the connector B fixed by a mounting plate 21 to one end side of the frame 20, an operation portion 23 rotatably fixed to the frame 20 to the other end side, The inspection unit main body 24 is moved forward and backward by the rotation of the portion 23.

The inspector body 24 has a fitting recess 25 for the connector B on the receiving portion 22 side and an inspection probe C for the terminal 26 of the connector B in the fitting recess 25.
Protective cover 27 for protecting the connection between the inspection probe C and an electric wire (not shown) connected to the inspection probe C on the 3 side
It consists of and. The tip ends 29a of the pair of links 29 are rotatably supported on both side walls 24 'and 24' of the inspector body 24, and the rear ends 29b are supported on both side walls 23 'and 23' of the operating portion 23 so as to be rotatable.

As a result, the rotational movement of the operating portion 23 is transferred to the back-and-forth movement of the inspector main body 24. Further, a pair of guide shafts (not shown) are installed in parallel from the lower side of the receiving portion 22 toward a fixing plate (not shown) of the frame 20 so as to pass through the inspector body 24 in parallel. It should be noted that a large number of inspection probes C are arranged corresponding to the positions and the number of terminals 26 inserted into the connector B to be inspected.

The inspection probe C inserted in the inspection device body 24 will be described. As shown in FIG. 6, the inspection probe C
Accommodates the front probe 31 for the terminal 26 (FIG. 5), the rear probe 32 that contacts the front probe 31 and is connected to an electric wire (not shown), and the rear half of the front probe 31 and the front half of the rear probe 32. It is composed of a cylindrical body 33.

The front probe 31 is formed by connecting three types of pins 31a, 31b and 31c of large, medium and small diameters in series. The tip of the large pin 31a contacts the terminal 26 (FIG. 5) and the rear of the large pin 31a. A spacer 3 that has a flange 34 between the end and the tip of the middle pin 31b and is formed in a cylindrical shape on the inner peripheral surface of the cylindrical body 33.
5, the tip of the small pin 31c is slidably arranged, the coil spring 37 is sandwiched between the rear end of the flange 34 and the tip of the spacer 35, and the middle pin 31b and the small pin 31c are inserted in the coil spring 37. It is made by inserting and.

The rear probe 32 is fitted in a hole 39 of a ring 38 which is inserted in the cylindrical body 33, and the outer cover portion 4 is attached.
0 and an inner pin 42 slidable inside the outer jacket 40 via a support 41 provided at the tip 40a of the outer jacket 40, and further, inside the rear end 40b of the outer jacket 40 and the inner pin 42. A coil spring 43 is provided between the rear end 42b, and a retaining member 44 is formed at the center of the outer jacket portion 40 against the movement of the inner pin 42 from the outer side to the inner side. And front stop 45 to prevent backward movement
a and a rear stopper 45b are provided, the tip 42a of the internal pin 42 is slidable in the hole 36 of the spacer 35, and the rear pin 31c of the small pin 31c of the front probe 31 is arranged with a gap 46 therebetween. Consists of

The operation of the inspection probe C will be described.
As shown in FIG. 5, by moving the inspector body 24 forward toward the connector B inserted in the receiving portion 22, the inspection probe C advances toward the terminal 26 in the connector B as shown in FIG. . When the tip of the terminal 26 comes into contact with the tip of the front probe 31 of the inspection probe C and the inspection probe C further advances, the front probe 31 retreats against the coil spring 37 as shown in FIG. Pin 3
The rear end 31 'of the 1c is located in the spacer 35 and the rear probe 32
The inner pin 42 comes into contact with the tip 42a of the inner pin 42 and the inner pin 42 retreats against the coil spring 43 as the small pin 31c retreats.

The small pin 31c of the front probe 31 comes into contact with the internal pin 42 of the rear probe 32 (the small pin 31c.
The contact between the inner pin 42 and the inner pin 42 serves as a switch), the electric wire (not shown) connected to the outer cover portion 40 of the rear probe 32, and the electric wire 19 attached to the connector B.
And are connected via a test circuit (not shown), and a continuity test is performed. Thereby, the insertion state of the terminal 26 into the connector housing 26 'and the terminal disconnection are inspected.

[0010]

However, since the tip surface of the large pin of the inspection probe is formed flat,
The tip of the terminal does not come into direct contact with the tip of the large pin,
There was a problem. Further, even when the terminal is imperfectly inserted into the connector or the terminal is disconnected, the spring pressure of the coil spring in the inspection probe is weak (for example, 20
Therefore, there is a problem in that it passes the continuity test of the terminal with respect to the connector.

In view of the above points, the present invention provides a connector terminal inspecting tool for surely inspecting a connector for incomplete insertion of a terminal, disconnection of a terminal or the like by bringing a large pin of an inspection probe into close contact with a tip of a terminal. The purpose is to provide.

[0012]

In order to achieve the above object, the present invention provides a receiving portion for inserting a connector to be inspected,
The tester main body is provided so as to be capable of moving forward and backward toward the connector inserted in the receiving portion and has a test probe for the terminal of the connector, and the test probe is slidably accommodated in the cylindrical body via a coil spring. In the connector terminal inspection tool having the above-mentioned front probe, the coil terminal spring is basically a connector terminal inspection tool having a spring force sufficiently larger than the contact resistance of the terminal with respect to the connector housing. Further, the tip of the front probe has a structure having a terminal receiving portion that is in contact with the terminal of the connector for conduction, and the terminal receiving portion has an engaging concave portion for a male terminal and an engaging convex portion for a female terminal. The structure is also effective.

[0013]

According to the present invention, since the elastic force exerted on the terminal by the coil spring is stronger than the resistance force by which the terminal tries to stay in the connector housing, the terminal receives the elastic force of the coil spring as the inspection probe advances. fall back. Claim 2
According to the above, the terminal receiving portion comes into contact with and abuts the terminal,
The terminal receiving portion and the terminal are electrically connected.

According to the third aspect, the terminal receiving portion corresponds to two types, one for the male type terminal and one for the female type terminal. The tip of the male terminal contacts the engaging recess. Alternatively, the tip of the female terminal contacts the engaging protrusion. As a result, the male or female terminal comes into contact with the terminal receiving portion and becomes conductive.

[0015]

1 to 4 show a connector terminal inspection tool according to the present invention. This connector terminal inspection tool comprises a terminal receiving portion 1 for the tip of the terminal at the tip of the front probe in the inspection probe. The terminal receiving portion has an engaging concave portion for the male terminal and an engaging convex portion for the female terminal.

The connector terminal inspection tool is the same as the conventional example except for the terminal receiving portion 1, so detailed description thereof will be omitted and the same reference numerals as those of the conventional example will be used. By the way, in this embodiment, the spring pressure of the coil spring is set to be stronger (for example, 2 kg) than the conventional spring pressure (200 g). The reason is,
This is because the contact resistance of the terminal with respect to the connector housing is made larger, that is, when the spring pressure is weak, the inspection is “passed” even in the state of “incomplete insertion of the terminal and disconnection of the terminal”.

FIG. 1 shows a first embodiment. The terminal receiving portion 1 is a terminal receiving portion 1 for a male terminal, and has a V-shaped groove (engagement recess) 1 as shown in FIG.
It is 1. The groove 11 has a rectangular prism (vertical u, horizontal v, height w) 2 and a base having an isosceles right triangle (length of each side is v, x, x), and the height of the rectangular prism 2 is vertical. A triangular prism (not shown) having a length equal to (u) is notched so that the central surface of the rectangular prism 2 and the central surface of the triangular prism match each other, and as shown in FIG. The cutout portion is symmetrical with respect to the center plane. Then, the tip of the terminal and the notched surface 3 are brought into contact with each other.

The notched surface 3 is shown in FIG.
As shown in (c), the two flat surfaces 3 ', 3 "are shaped so as to intersect with each other.
And the lower flat surface 3 ″ come into contact with the outer circumference of the tip of the terminal.
The size of the triangular prism cut out from the quadrangular prism 2 can be any size as long as the notch surface 3 contacts the tip of the terminal.

FIG. 2 shows a second embodiment. The terminal receiving portion 4 is a terminal receiving portion 4 for a male terminal, and as shown in FIG. 2A, a conical groove (engaging recess) 1 is formed.
It is 2. This groove 12 is a cylindrical body (diameter r, height h) 5
Therefore, a cone (not shown) whose center angle is 90 ° and whose bottom surface is a circle (diameter r which is the same as the diameter of the cylinder) and whose height is h ′ (h ′ <h) is It has a notched shape that matches the center line.

As shown in FIGS. 2B and 2C, the cutout portion is symmetrical with respect to the center line. Then, the notched surface 6 that is notched is brought into contact with the tip of the terminal. If the notch surface 6 contacts the tip of the terminal, the size of the cone cut out from the cylindrical body 5 may be any size.

FIG. 3 shows a third embodiment. The terminal receiving portion 7 is a terminal receiving portion 7 for a female terminal, and has an engaging protrusion (engaging protrusion) 9 as shown in FIG. The engaging projection 9 is formed at the center of the flat plate 8 so as to project perpendicularly to the female terminal, as shown in FIG.
As shown in (c), the center line of the flat plate 8 and the center line of the engaging projection 9 are coincident with each other. The outside of the engagement protrusion 9 and the inside of the female terminal are loosely inserted or fitted.

The engagement projection 9 is loosely inserted in the female terminal,
As long as the tip of the female terminal comes into contact with the flat plate 8, the size of the engaging projection 9 does not matter. Further, instead of the flat plate 8, a circular plate may be used, or another shape may be used. If the engaging projection 9 has a size that allows loose insertion into the female terminal,
It may be anywhere on the flat plate 8.

Next, the operation of the terminal receiving portion for the terminal will be described. It should be noted that only the first embodiment will be described because it applies to all the first, second and third embodiments. As shown in FIG. 5, the connector B is inserted into the receiving portion 22 of the connector terminal inspecting tool A, and the lever 28 of the operating portion 23 vertically protrudes in the fitting recess 25 of the inspector body 24. C is advanced toward the connector B as shown in FIG.

Since the spring pressure of the coil spring 37 (FIG. 6) in the inspection probe C is stronger than before (for example, 2 kg), the terminal 26 is imperfectly inserted into the connector housing 26 '(the locking lance 10 in the connector B). 4 (b), the inspection probe C contacts the tip of the terminal 26 and the terminal 26 tries to stay in the terminal accommodating chamber of the connector B ( Since the force of the inspection probe C pushing the terminal 26 is stronger than the force of keeping the locked state), the inspection probe C retracts the terminal 26 with respect to the connector housing 26 'in the direction opposite to the insertion direction of the terminal. Let

As a result, the inspection probe C does not come into contact with the terminal 26, so that the electric wire 19 from the connector B and the electric wire (not shown) from the inspection probe C are not connected via the continuity inspection circuit not shown. That is, the connector terminal inspection tool A
Is judged as “fail”.

As described above, the connector terminal inspection tool A can detect the insertion state of the terminal 26 into the connector B and the conduction state of the terminal 26. Alternatively, when the terminal 26 is retracted by the inspection probe C, in addition to the connector terminal inspecting tool A, an inspector (worker) and a continuity inspection deciding device (YC checker) not shown insert the terminal 26 into the connector B. The state and the conduction state can be detected, and double check is possible.

When the connector 19 has a missing terminal, the inspection probe C does not come into contact with the tip of the terminal 19, so that the electric wire 19 from the connector B and the electric wire 19 from the inspection probe C are connected. Are not connected via a continuity check circuit (not shown). That is, the connector terminal inspecting tool A determines "fail". Therefore, when the connector terminal inspecting tool A is used, the determination of "fail" means "imperfect insertion" or "terminal missing" of the terminal 19.

[0028]

As described above, according to the present invention, when the terminal is incompletely inserted in the connector, the terminal is retracted by the elastic force of the coil spring as the terminal receiving section advances, and the terminal and the terminal receiving section are moved. Does not conduct, and when the terminal is missing in the connector, the terminal does not contact the terminal receiving part and does not conduct, so the insertion state and conduction state of the terminal to the connector can be checked at the same time. . Further, when the terminal is incompletely inserted in the connector, the terminal is retracted by the terminal receiving portion, so that the operator can visually check the inserted state and the conductive state of the terminal.

Furthermore, since the engaging concave portion of the terminal receiving portion with respect to the female terminal or the engaging convex portion with respect to the female terminal contacts the tip of each terminal, each terminal can be easily disengaged from the terminal receiving portion. Therefore, the reliability of the contact state between the tip of the terminal and the terminal receiving portion is increased, and the inspection accuracy is improved. And by exchanging the terminal receiving part, it is possible to correspond to male and female terminals, and by moving the position of the inspection probe of the inspector body, it is possible to correspond to various types of connectors. Therefore, the equipment cost can be reduced.

[Brief description of drawings]

FIG. 1 shows a first embodiment of a terminal receiving portion of a connector terminal inspection tool according to the present invention, (a) is a perspective view, (b) is a side view, and (c) is a view in the X direction. FIG.

2A and 2B also show a second embodiment of the terminal receiving portion, FIG. 2A is a perspective view, FIG. 2B is a side view, and FIG. 2C is a front view of a main part in the Y direction.

3A and 3B also show a third embodiment of the terminal receiving portion, FIG. 3A is a perspective view, FIG. 3B is a side view, and FIG. 3C is a front view of a main part in the Z direction.

FIG. 4 is a vertical sectional view showing a contact state between the terminal and the terminal receiving portion, and FIG. 4B is a vertical cross-sectional view showing a state after the contact between the terminal and the terminal receiving portion. It is a side view.

FIG. 5 is a perspective view of a conventional connector terminal inspection tool.

FIG. 6 is a longitudinal sectional view of the inspection probe of the same.

FIG. 7 is a vertical sectional view showing a contact state between the terminal and the inspection probe.

[Explanation of symbols]

 1, 4, 7 Terminal receiving part 9 Engaging convex part 11, 12 Engaging concave part A connector terminal inspection tool B connector C inspection probe

Claims (3)

[Claims] 1. A receiving part for inserting a connector to be inspected,
The tester main body is provided so as to be capable of moving forward and backward toward the connector inserted in the receiving portion and has a test probe for the terminal of the connector, and the test probe is slidably accommodated in the cylindrical body via a coil spring. In the connector terminal inspection tool having the above-mentioned front probe, the coil spring has a spring force sufficiently larger than a contact resistance of the terminal to the connector housing. 2. The connector terminal inspection tool according to claim 1, wherein the front end of the front probe has a terminal receiving portion that is in contact with and electrically connected to a terminal of the connector. 3. The connector terminal inspection tool according to claim 1, wherein the terminal receiving portion has an engaging concave portion for a male terminal and an engaging convex portion for a female terminal.