JPH0738971U - Inspection probe pin insertion socket - Google Patents

Abstract

(57) [Abstract] [Purpose] The insertion socket of the probe pin for inspection is press-fitted into the holding hole of the insulating holding plate so that it does not fall out easily without bending or tilting, and the inspection is performed on the insertion socket. A ridge for press-fitting is easily formed so that the probe pin for use does not fall off. [Structure] A conductive metal cylinder 11a and a spring 11b.
The probe pin 11 for inspection formed by inserting the plunger 11c by slidably projecting from the tip end of the cylindrical body 11a with the interposition thereof is press-fitted into the holding hole 1a formed in the insulating holding plate 1. A plurality of protrusions 12a along the axial direction are formed at symmetrical positions on the outer periphery of the upper end of the insertion socket 12 to be inserted into the provided insertion socket 12, and above the small diameter portion 12b at the lower end of the insertion socket. The large diameter portion 12c of the small diameter portion 12
From the boundary between b and the large-diameter portion 12c to a predetermined position of the large-diameter portion 12c, insert a probe pin for inspection having a plurality of protrusions 12d along the axial direction that protrudes toward the inner peripheral surface of the insertion socket 12. Plug socket to do.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention constitutes a printed wiring inspection device by press-fitting a plurality of holes into a holding hole formed in an insulating holding plate so that the printed wiring can be inspected by contacting each contact portion of the printed wiring. The present invention relates to the improvement of the socket for inserting the probe pin for inspection.

[0002]

[Prior art]

 FIG. 2 is a perspective view showing a conventional general printed wiring inspection apparatus. 1 is an insulating holding plate in which a plurality of inspection probe pins 2 for inspecting printed wiring are press-fitted into a holding hole. It is a guide piece that guides a plurality of printed wiring boards 4 to be inspected, which are installed on the outer peripheral portion of the inspection probe pin 2 so as to come into contact with the inspection probe pin 2.

Reference numeral 5 denotes a female connector having a plurality of female contacts 5a attached to the insulating holding plate 1 via a supporting member 6, and these female contacts 5a and the probe pins 2 for inspection are connected to each other. A lead wire (not shown) is connected between them. Reference numeral 7 is a male connector having a male contact 7a which can be connected to the female contact 5a, and a cable 8 in which lead wires connected to the male contact 7a are bundled is connected to an inspector 9.

FIG. 3 shows an insertion socket of a conventional probe pin 2 for inspection, in which a spring (not shown) is interposed in a cylindrical body 2a made of a conductive metal so as to slidably project from its tip. The probe pin 2 for inspection formed by inserting the plunger 2b is press-fitted and inserted into the insertion socket 10 which is press-fitted into the holding holes 1a formed in the insulating holding plate 1.

As described above, in order to press-fit and insert the insertion socket 10 into the plurality of holding holes 1 a formed in the insulating holding plate 1, a ring-shaped outer periphery of the tip end portion of the insertion socket 10 is provided. A protrusion 10a is formed, and the ring-shaped protrusion 10a is press-fitted into the holding hole 1a of the insulating holding plate 1 so as to prevent the insertion socket 10 from slipping out of the insulating holding plate 1. Mounted. In addition, in order to insert the conductive metal cylinder 2a forming the inspection probe pin 2 into the insertion socket 10 which is press-fitted in the insulating holding plate 1 so as not to easily fall out. At the lower end portion of the insertion socket 10, a part of the outer periphery thereof is crushed in the inner peripheral direction by, for example, a punch or the like to form several protrusions 10b protruding toward the inner peripheral surface side.

[0006]

[Problems to be solved by the device]

 However, in the conventional example shown in FIG. 3, a ring-shaped projection 10a formed on the outer periphery of the tip end portion of the insertion socket 10 into which the probe pin 2 for inspection is inserted is formed on the insulating holding plate 1 described above. When it is press-fitted into the provided holding hole 1a, the resistance is large and it is difficult to press it in. If it is forcibly press-fitted, the insertion socket 10 is tilted or bent, and the ring-shaped projection 10a is crushed and inserted. There is a problem that the inner surface of the socket 10 is deformed and the probe pin 2 for inspection is damaged, making it difficult to insert and remove the probe pin 2 when exchanging it.

In order to eliminate the above-mentioned problems, the holding hole 1a to be bored in the insulating holding plate 1 may be made large, but this will result in poor positional accuracy and the inspection plate. Since the insertion socket 10 into which the conductive metal cylindrical body 2a forming the lobe pin 2 is inserted easily falls out of the holding hole 1a, the insertion socket 10 is removed from the lower surface of the insulating holding plate 1 in order to eliminate it. It is necessary to fit a shrinkage tube to the protruding portion or fix the insertion socket 10 to the insulating holding plate 1 with an adhesive, which causes a problem that the number of working steps increases and the manufacturing cost increases. there were.

Further, in order to insert the conductive metal cylinder 2a forming the inspection probe pin 2 into the insertion socket 10 so as not to easily fall out, the lower end portion of the insertion socket 10 has its outer periphery. A part of the inner circumference is crushed with a punch, for example, to form a few protrusions 10b that project toward the inner circumference. In other words, if it is crushed strongly, the protrusion 10b projecting to the inner peripheral surface side becomes too large and the conductive metal cylinder 2a cannot be inserted. Conversely, if it is crushed weakly, the protrusion protruding to the inner peripheral surface side becomes too large. There was a problem that 10b was too small and the conductive metal cylinder 2a could easily fall out.

In view of the above problems, the present invention press-fits an insertion socket into which an inspection probe pin is inserted into a holding hole formed in an insulating holding plate while strictly controlling the processing accuracy of the hole diameter. The upper end of the insertion socket can be pressed in relatively easily when it is planted, and it is bent, has no inclination, and has a constant height position so that it does not fall out. A plurality of ridges are formed along the axial direction at symmetrical positions on the outer periphery of the, and when the test probe pin is inserted into the insertion socket, this test probe pin does not easily come off. An object of the present invention is to provide an insertion socket for a probe pin for inspection, in which a plurality of protrusions are formed on the lower end portion of the insertion socket along the axial direction so as to protrude to the inner surface side.

[0010]

[Means for Solving the Problems]

 In order to achieve the above object, the insertion socket of the probe pin for inspection of the present invention is slidable from the tip of the conductive metal cylinder 11a with a spring 11b interposed in the conductive metal cylinder 11a. The probe pin 11 for inspection formed by projecting to the above and inserting the plunger 11c is inserted into the insertion socket 12 press-fitted into the holding holes 1a formed in the insulating holding plate 1. A plurality of ridges 12a are formed along the axial direction at symmetrical positions on the outer periphery of the upper end of the insertion socket 12, and further, on the large diameter portion 12c above the small diameter portion 12b at the lower end of the insertion socket 12, From the boundary 12e between the small-diameter portion 12b and the large-diameter portion 12c to a predetermined position of the large-diameter portion 12c, a plurality of ridges 12d extending in the axial direction and protruding toward the inner peripheral surface of the insertion socket 12 are formed. Features It is intended.

[0011]

[Action]

 The insertion socket 12 of the probe pin for inspecting the printed wiring according to the present invention has the above-described structure, that is, a plurality of projections 12a along the axial direction are provided at symmetrical positions on the outer periphery of the upper end of the insertion socket 12. Due to the formation, when the protrusion 12a is press-fitted into the holding hole 1a formed in the insulating holding plate 1, the press-fitting is easy and is not bent or tilted. Further, since the protrusion 12a is formed along the axial direction at a symmetrical position on the outer periphery of the insertion socket 12, the mounting position of the insertion socket 12 is highly accurate on the insulating holding plate 1. There is no risk of being eccentrically attached to the holding hole 1a that has been drilled.

In addition, in the large diameter portion 12c above the small diameter portion 12b at the lower end portion of the insertion socket 12, from the boundary between the small diameter portion 12b and the large diameter portion 12c to a predetermined position of the large diameter portion 12c. Since a plurality of protrusions 12d extending along the axial direction that protrudes toward the inner peripheral surface of the insertion socket 12 are formed, the plurality of protrusions 12d can be formed at the same time when the insertion socket 12 is formed. The protrusion 12d can be formed extremely easily.

[0013]

【Example】

 An embodiment of a probe pin insertion socket for printed wiring according to the present invention will now be described in detail with reference to the drawings. FIG. 1A is an enlarged cross-sectional view of a probe pin for inspection inserted into the insertion socket of the present invention. The conductive metal cylinder 11a is inserted into the conductive metal cylinder 11a with a spring 11b interposed therebetween. A plurality of holding holes formed in the insulating holding plate 1 so that the probe pins 11 for inspection formed by slidably projecting from the tip and inserting the plunger 11c can come into contact with each contact portion of the printed wiring. A plurality of ridges 12a are formed along the axial direction at symmetrical positions on the outer periphery of the upper end of the insertion socket 12, which are inserted into the insertion socket 12 that is press-fitted into 1a.

Further, in the large diameter portion 12c above the small diameter portion 12b at the lower end portion of the insertion socket 12, from the boundary 12e between the small diameter portion 12b and the large diameter portion 12c to a predetermined position of the large diameter portion 12c. A plurality of protrusions 12d extending along the axial direction and projecting toward the inner peripheral surface of the insertion socket 12 are formed simultaneously with the formation of the insertion socket 12. 1B is a cross-sectional view taken along line XX of FIG.

Since the insertion socket of the present invention is configured as described above, that is, a plurality of ridges 12a along the axial direction are arranged at symmetrical positions on the outer periphery of the upper end of the insertion socket 12. By forming the ridges, when the protrusion 12a is press-fitted into the holding hole 1a formed in the insulating holding plate 1, the press-fitting is easy, and the protrusion 12a is not bent or tilted to be attached. Also, since the protrusion 12a is formed along the axial direction at a symmetrical position on the outer periphery of the upper end portion of the insertion socket 12, the mounting position of the insertion socket 12 is accurate with respect to the insulating holding plate 1. There is no possibility of being mounted eccentrically than the holding hole 1a formed with a high height.

Further, since the inspection probe pin 11 is inserted into the insertion socket 12 so as not to fall out, the boundary 12e between the small diameter portion 12b and the large diameter portion 12c at the lower end portion of the insertion socket 12 to the large diameter portion 12e. By forming a plurality of protrusions 12d along the axial direction that protrude toward the inner peripheral surface side of the insertion socket 12 up to a predetermined position of the insertion socket 12 simultaneously with the formation of the insertion socket 12, the protrusion 12d is formed. It can be done easily.

[0017]

[Effect of device]

 The plug socket of the probe pin for inspecting printed wiring of the present invention is configured as described above, that is, a plurality of sockets along the axial direction are arranged at symmetrical positions on the outer periphery of the upper end of the plug socket. By forming the ridge, when the ridge is press-fitted into the holding hole formed in the insulating holding plate, the press-fitting is easy, and the ridge is not bent or tilted. Since this ridge is formed along the axial direction at a symmetrical position on the outer periphery of the upper end of the insertion socket, the mounting position of this insertion socket is drilled with high positional accuracy on the insulating holding plate. There is no risk of eccentric mounting from the holding hole.

Further, since the inspection probe pin 11 is inserted into the insertion socket 12 so as not to fall off, from the boundary between the small diameter portion and the large diameter portion of the lower end portion of the insertion socket to the predetermined position of the large diameter portion. By forming a plurality of projections along the axial direction that project toward the inner peripheral surface side of the insertion socket at the same time when the insertion socket is formed, the projections can be formed easily.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view in which a probe pin for inspection is inserted into an insertion socket of the present invention.

FIG. 2 is a perspective view showing a conventional general printed wiring inspection apparatus.

FIG. 3 is an enlarged sectional view in which a probe pin for inspection is inserted into a conventional insertion socket.

[Explanation of symbols]

 1 Insulating holding plate 1a Holding hole 2 Inspection probe pin 2a Conductive metal cylinder 2b Plunger 3 Guide piece 4 Printed wiring board 5 Female connector 5a Female contact 6 Support member 7 Male connector 7a Male contact 8 Cable 9 Inspection device 10 Insertion socket 10a Ring-shaped protrusion 10b Protrusion 11 Inspection probe pin 11a Conductive metal cylinder 11b Spring 11c Plunger 12 Insertion socket 12a Small protrusion 12b Small diameter portion 12c Large diameter portion 12d Protrusion 12e boundary

Claims (1)

[Scope of utility model registration request] 1. A conductive metal cylinder (11a) having a spring (11b) interposed between the conductive metal cylinder (11a) and the conductive metal cylinder (11a).
Plunge the plunger (1
Inspection probe pin (11) formed by inserting 1c)
A plurality of insulating holes are formed in the insulating holding plate (1).
A plurality of ridges (12a) along the axial direction are formed at symmetrical positions on the outer circumference of the upper end of the insertion socket (12), which are inserted into the insertion socket (12) press-fitted in a). Further, from the boundary (12e) between the small diameter portion (12b) and the large diameter portion (12c) to the large diameter portion (12c) above the small diameter portion (12b) at the lower end portion of the insertion socket (12). Insert the socket (1
2) An insertion socket for a probe pin for inspection, characterized in that a plurality of protrusions (12d) are formed along the axial direction so as to protrude to the inner peripheral surface side.