JPH08271546A - Connector for inspecting stepping motor - Google Patents

Abstract

PURPOSE: To obtain a connector for inspecting a stepping motor which deals even with a fine pitch terminal pin without causing breakage even of a thin resin terminal pin and in which good contact can be ensured when conduction and withstand voltage tests are effected by touching a contactor to a conductor binding part formed on the surface of terminal pin in the stepping motor by deforming the connector according to the variant shape at the conductor binding part. CONSTITUTION: Upper and lower clamps 2, 1 are pivoted through a compression spring 5 on one side thereof. Pieces 6, 6 for clamping the drum part of a stepping motor, a step part 7 for stopping a terminal pin seat 21, and a part 8 for receiving the end face of the stepping motor 20 are formed on the lower clamp 1. Both clamps 1, 2 are provided with upper and lower contact pieces 15, 12 in the form of thin leaf spring at the same pitch as the terminal pin 22 of the stepping motor 20. A conductor binding part 23 is clamped by the contact face parts at the forward end of the contact pieces 15, 12 stretching like a cantilever.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector for inspection which is particularly effective for inspecting the energization and withstand voltage of a stepper motor provided with a plurality of resin terminal pins.

[0002]

2. Description of the Related Art Conventionally, since the terminal pin of a stepper motor has been made of metal, the needle-like contactor of an inspection jig must be attached from the axial direction of the terminal pin to inspect the stepper motor for energization and withstand voltage. I went by applying it to the end face. However, in recent years, in small diameter stepper motors with a diameter of about 10 mm, the material of the terminal pins has been the same as that of the bobbin, which is made of synthetic resin.
The above inspection method no longer works. Therefore, as shown in FIG. 5, a probe 24 having a built-in compression spring 25,
An inspection jig composed of a plate-shaped contactor 26 which can be moved up and down by the spring 25 is used, and the plate-shaped contactor 26 is placed on the resin-made terminal pin 22 from above the lead wire-carrying point 23. It has changed to a method of applying along the axial direction. The resin terminal pin 22 is the stepper motor 20.
A plurality of terminal pin seats 21 are formed so as to project from the through holes formed in the metal casing of the stepper motor. It is formed by picking up a terminal and then fried.

[0003]

The problem to be solved by the present invention is to fix the resin-made terminal pin 22 in the structure in which the plate-like contact 26 as shown in FIG. The thinner the thickness, the higher the terminal pin breakage rate due to overload load, eccentric load, etc.,
The plate-shaped contactor 26 of FIG.
Since the adaptability to the surface is poor and there is no function of cleaning foreign matter adhering to the surface, there is a possibility that contact failure may occur, and the probe 24 with the coil spring 25 built-in has a diameter of about 2 mm. Therefore, it is not possible to cope with the terminal pin 22 having a narrow pitch of, for example, 1.4 mm, and further, as can be seen, it was difficult to secure a withstand voltage gap with the metal casing of the stepper motor 20. , To eliminate the inconvenience.

[0004]

According to the present invention, a lower sandwiching body and an upper sandwiching body having a compression spring interposed on one side thereof are rotatably pivotally attached to the lower sandwiching body of a stepper motor. A pair of holding pieces for holding the body portion, a step portion for engaging and locking the seat for the terminal pin of the stepper motor, and a receiver for receiving the end surface of the stepper motor are formed, respectively. The body is provided with a narrow leaf spring-shaped lower contact piece and an upper contact piece at the same pitch as the pitch of the terminal pins of the stepper motor, and the tip contact of each contact piece protruding in a cantilever shape. With respect to the surface, the conductive wire colored portion formed on the surface of the terminal pin is sandwiched.

It is preferable that the tip portion of the contact piece is oriented at an angle with respect to the winding direction of the lead wire colored portion.

[0006]

The stepper motor is properly positioned and fixed, and in this state, the lead wire portion of the terminal pin is clamped by the tip contact surface of the contact piece. The contact piece that can be attached to both clamps that can be opened and closed moves forward while rubbing the surface after the contact surface of the tip of the contact piece touches the surface of the lead wire carrage part in the process of closing both clamps. Show movement. In addition, it deforms by conforming to the surface of the lead wire where the shapes are not the same. Before an overload or an eccentric load is applied to the lead wire bursa, the contact piece of the leaf spring structure extending in a cantilever shape bends and reduces itself. The side-by-side structure of a plurality of contact pieces can secure a withstand voltage gap with a stepper motor and can support a narrow terminal pin pitch.

If the tip contact surface of the contact piece is oriented to form a certain angle with respect to the winding direction of the lead wire colored portion, when the tip portion of the contact piece moves as described above, the lead wire colored portion It is possible to prevent it from slipping off from the lead wire mess due to the unevenness.

[0008]

1 is an exploded perspective view of an inspection connector according to the present invention, in which a stepper motor 20 is also shown. The basic structure of this inspection connector is shown in FIG.
As can be seen from the above, the lower holding body 1 and the upper holding body 2 have a hinge structure in which the lower holding body 1 and the upper holding body 2 are pivotally attached by a pivot 3 and a snap ring 4, and a compression spring 5 is interposed on one side. Is. The lower sandwiching body 1 is formed with sandwiching pieces 6 and 6 on the front end side. A seat 21 for the terminal pin of the stepper motor 20 is provided at the connecting base of the two clamping pieces 6, 6.
A step portion 7 for engaging and locking is formed. Lower clamp 1
On the lower surface of the, a receiver 8 for receiving the end surface of the stepper motor 20 is provided. The large through hole 9 formed in the connection base of the two holding pieces 6 and 6 and the vertical split 10 for communicating the through hole 9 to the outside are provided with the stepper motor 20.
When pushing in against the elasticity of 6, both clamping pieces 6,6
The purpose of this is to enable the expansion. Reference numeral 11 denotes a hole formed in the lower holding body 1, into which the pivot 3 is inserted.

Although not visible in FIG. 1, the same number as the terminal pins 22 of the stepper motor 20 (four in the illustrated example)
The narrow leaf spring-shaped lower contact piece 12 is provided along the bottom face of the lower holding body 1 at the same pitch as the pitch of the terminal pins 22, and is pressed by the receiving plate 8 and then each lower contact piece 12 is pressed. Is bent into an inverted L shape to stand up inside the through hole 9, and the tip end portion thereof is exposed on the upper surface 13 of the connecting base portion. The lower sandwiching body 1 and the receiver 8 may be separate bodies as shown in the figure, or both may be integrally molded to simultaneously fix a plurality of lower contact pieces 11.

The upper holding body 2 having a structure in which the upper step portion 2a and the lower step portion 2b are connected to each other has a hole 14 formed in the lower step portion 2b through which the pivot 3 is inserted. Along with the side end surface of the upper step portion 2a of the upper clamp body 2, the same number of terminal pins 22 of the stepper motor 20 (four in the illustrated example) as the narrow leaf spring-shaped upper contact piece 15 are provided. It is installed at the same pitch as that of No. 1 and is pressed by the presser foot 16 and then extends like a cantilever. The tip contact surface is arranged to face the tip contact surface of the lower holding body 1. As for the relationship between the upper clamp body 2 and the presser foot 16, as in the case of the lower clamp body 1 and the receiving plate 8, it is possible to integrally form both and simultaneously fix a plurality of upper contact pieces 15. In addition, 17 is a conducting wire connected to the upper contact piece 15, and 18 is an insulating tube that encloses the connecting portion.

In FIG. 4, the tip contact surface 15a of the upper contact piece 15 is not simply bent into an L-shape, but is about 45 ° in the illustrated example with respect to the winding direction of the lead wire carrage portion 23.
It shows an example of twisting so as to form. In this example, only the upper contact piece 15 is twisted, but if necessary, the lower contact piece 12 may be twisted in the same manner.

FIG. 2 shows a stepper motor 2 to be inspected.
FIG. 3 is a perspective view showing a state in which 0 is attached to the inspection connector and is used for inspection. The stepper motor 20 is attached as follows. First, the rear end face of the stepper motor 20 is received in a state where the end portions of the lower holding body 1 and the upper holding body 2 are pinched with fingers and the front end portions of both the contact pieces 12, 15 are expanded against the compression spring 5. The stepper motor 2 against the elasticity of both clamping pieces 6 and 6 while contacting the stepper motor 2
The terminal pin seat 21 of 0 is pushed into the stepped portion 7 until it is fitted and locked. By doing so, the terminal pin 22 of the stepper motor 20 which is correctly positioned is attached to both the contacts 12, 15
Inserted in between, the casing body of the stepper motor 20 is sandwiched by both sandwiching pieces 6, 6. Then, this time, the force of the finger is loosened, and the two clamping bodies 1 and 2 are closed by the restoring force of the compression spring 5. Then, initially, as shown by the solid line in FIG. 3, both contact pieces 12, 15 are connected to the lead wire colored portion 2 of the terminal pin 21.
Although contact is made from the upper and lower sides of 3 with substantially the same elastic force, but when both holding bodies 1 and 2 are closed thereafter, the horizontal portions of both contact pieces 12 and 15 elongated in a cantilever shape are as shown in FIG. , And is elastically deformed into a concave shape, while the tip contact surface 15a is transported forward while rubbing the surface of the conductor wire-carrying point 23, and the holding bodies 1 and 2 are in a locked state and stand still.

[0013]

As described above, according to the present invention, in the stepper motor to be inspected, the end face and the terminal pin seat are received by the receiving plate and the step portion, and the body portion is sandwiched by the pair of sandwiching pieces, and the correct position is obtained. Since it can be fixed in the direction, it is possible to surely hold the lead wire portion of the terminal pin with the tip contact surface of the contact piece. Moreover, after the tip contact surface of the contact piece first comes into contact with the lead wire mess, both gripping bodies with the contact piece attached are further closed to move the contact piece forward while rubbing the contact surface. Cleans and removes the oxide film on the surface of the child piece and the surface of the lead wire and the foreign substances such as the flux attached in the soldering process. Therefore, good electrical connection is made. Also,
Since each contact piece has a leaf spring structure that extends like a cantilever, each contact piece itself is bent and deformed before overload or eccentric load is applied to the lead wire bursa, and the load is reduced. Therefore, even a thin resin terminal pin is not likely to be broken. In addition, it can adapt well to the surface of the spot where the lead wire has a non-uniform shape, preventing contact failure. The side-by-side structure of the plurality of contact pieces can sufficiently support the withstand voltage gap with the stepper motor and the narrow terminal pin pitch.

If the tip contact surface of the upper contact is twisted to form an angle with the winding direction at the lead wire colored portion of the terminal pin, the length of the wire contact portion is extended and only the number of contact points is increased. Instead, the tip contact surface of the upper contact piece is not scratched when it is moved forward while rubbing the lead wire salient portion, which contributes to the prevention of slipping from the lead wire salient portion.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an inspection connector according to the present invention.

FIG. 2 is a perspective view showing a usage state of the inspection connector of FIG.

FIG. 3 is a side view of a tip portion of an upper contactor.

FIG. 4 is a plan view of FIG.

FIG. 5 is a cross-sectional view showing a state of inspecting using a conventional inspection jig.

[Explanation of symbols]

 1 is a lower clamp 2 is an upper clamp 5 is a compression spring 6 is a clamp 7 is a clamp 7 is a step 8 is a receiving plate 12 is a lower contact piece 15 is an upper contact piece 20 is a stepper motor 21 is a terminal pin seat 22 Terminal pin 23 is the lead wire

Claims (2)

[Claims] 1. A lower sandwiching body 1 and an upper sandwiching body 2 with a compression spring 5 interposed on one side so as to be rotatable. The lower sandwiching body 1 is used for sandwiching a body portion of a stepper motor. Stepped portion 7 for engaging and locking the pair of holding pieces 6, 6 and the seat 21 for the terminal pin 22 of the stepper motor 20.
And a receiving member 8 for receiving the end face of the stepper motor 20 are formed respectively, and the holding members 1 and 2 are in contact with each other at the same pitch as the pitch of the terminal pins 22 of the stepper motor 20 in the form of a narrow leaf spring. A contact piece 12 and an upper contact piece 15 are provided side by side, and each contact piece 1 is projected in a cantilever shape.
A stepper motor inspection connector, characterized in that the lead wire contact portion formed on the surface of the terminal pin 22 is held between the tip contact surfaces 2 and 15. 2. The tip contact surface 15a of the upper contact piece 15
2. The stepper motor inspection connector according to claim 1, wherein said wire is oriented at an angle with respect to the winding direction of said lead wire portion 23.