JP2876146B2 - Receptacle type contact - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a receptacle-type contact, and more particularly to an electrical contact that fits with a round pin.

[Related Art and Problems] Various types of receptacle type contacts, such as coaxial connectors and the like, have been proposed and used as pins, particularly, round pins, which are in electrical contact with each other to form pin sockets.

An example of such a receptacle (female) type contact is shown in FIGS. 5 (A) to 5 (D). The receptacle type contact 1 shown in FIG. 5 (A) is divided into two parts by forming a slit at one end of a cylindrical metal, and the contact 2 shown in FIG. 5 (B) is similarly divided into four parts and drawn inward. Has been granted. A round pin 3 is attached to one end of the receptacle type contacts 1 and 2 having such elasticity.
To make electrical connection with the pin 3 at the tips of the contacts 1 and 2, and is widely used as a contact for the center conductor of a coaxial connector.

Such receptacle-type contacts 1 and 2 can realize relatively good electrical contact by appropriately selecting the material, plate thickness and processing shape of the cylindrical metal. However, a large force is applied to the contact portion of the contact due to the insertion angle and displacement of the pin 3 with respect to the axis of the receptacle type contacts 1 and 2 or "torsion" at the time of insertion / removal, and the contact loses its elasticity due to deformation. In other words, there is a disadvantage that it is extremely vulnerable to "prying" and cannot withstand frequent insertion and removal.

Therefore, a closed entry type receptacle type contact as shown in FIGS. 5 (C) and 5 (D) has been proposed. The former is a receptacle-type contact 6 in which the outer periphery of the inner contact 4 is covered with a sleeve 5 as in FIGS. 5 (A) and 5 (B). The latter is a receptacle type contact 9 having a cantilever-shaped inwardly inclined elastic contact piece 8 at the rear thereof, with the front end of the metal sleeve 7 remaining circular.

These receptacle-type contacts 6 and 9 have improved "prying" resistance as compared with the contacts 1 and 2 described above. However, when the pin 3 is inserted, especially in the case of a contact for a small high-density connector, a slight displacement between the contact and the pin may cause the pin to collide with the front end of the receptacle-type contact, thereby damaging or deforming the contact or the pin. There is a danger of doing. Further, there is a disadvantage that it is difficult to select an appropriate value for the insertion / extraction force of the pin.

Japanese Patent Application Laid-Open No. Sho 59-96685 discloses a round bar insertion socket formed by fixing an enclosing spring or an enclosing spring ring outside a main body having a plurality of contact spring arms formed thereon. Such a conventional socket requires a plurality of components such as a main body, an enclosing spring, and a tightening ring, so that the structure is complicated and expensive. Furthermore, the contact characteristics with the round bar (pin contact) are not sufficient, and the contact spring is exposed to the outside.

Therefore, an object of the present invention is to make it possible to easily insert a mating pin contact, to be resistant to "twisting", to provide a reliable electrical connection with an appropriate insertion force and contact pressure, and to be easy to handle and have an external force. Accordingly, it is an object of the present invention to provide a receptacle-type contact which is free from a risk of deformation and damage.

Means and Action for Solving the Problems The receptacle type contact of the present invention has an inner cylindrical body formed in a substantially cylindrical shape for contacting a round pin, and an outer cylindrical body arranged on the outer periphery thereof. And has the following structural features.

The inner cylindrical body has a substantially ring-shaped end formed near the insertion end of the round pin and at a position away from the insertion end, and is connected between the ring-shaped ends and at substantially equal intervals in the circumferential direction. A plurality of fixed-end fixed conductor pieces bent toward the center in a substantially U-shape, and a plurality of substantially V-shaped fixed-end conductors extending from the ring-shaped end on the insertion end side to the fixed-end pieces. With a piece. The outer tubular body is configured to cover substantially the entire surface of the inner tubular body.

The receptacle-type contact having such a configuration is guided and inserted along the inner tubular body by a plurality of fixed-end conductor pieces having sufficient strength when the round pin is inserted, and the one-end fixed conductor piece is excessively bent and deformed. The generation of "pinch" is prevented and the plurality of single-ended fixed conductor pieces having sufficient elasticity ensure good electrical contact with the round pin. Further, since the outer tubular body covers substantially the entire surface of the inner tubular body, the conductor piece of the inner tubular body is effectively protected from deformation and damage by an external force during handling. These inner tubular body and outer tubular body can be formed relatively easily by punching and bending a metal plate.

[Embodiments] FIGS. 1 to 4 show preferred embodiments of the present invention.
This will be described in detail with reference to the drawings.

FIG. 1 shows a longitudinal sectional view of a completed receptacle type contact (hereinafter simply referred to as a contact) 10 according to a preferred embodiment of the present invention. This contact 10 has a pin
This is the contact insertion port. The contact 10 includes an outer cylindrical body (sleeve) 11 and an inner cylindrical body 12 concentric with the outer cylindrical body (sleeve). The left end of the outer cylindrical body 11 is bent so as to enclose the end of the inner cylindrical body 12, and a pin (not shown)
Of the insertion end guide portion 13 of FIG.

As shown in the end view of FIG. 2, a plurality of (three in this specific embodiment) substantially U-shaped fixed-end conductor pieces 14a to 14c (both in the specific embodiment) are provided on the inner cylindrical body 12 along the circumference thereof. Hereinafter, collectively
14) and contact conductor pieces 15a to 15c (hereinafter, collectively referred to as 15) fixed at one end and bent in a substantially V shape. In addition, both ends 12a, 1 of the inner cylindrical body 12
2b is substantially perfect circular. In addition, the free end 16 of the contact conductor piece 15 is connected to the outer cylindrical body at least when the pin is inserted.
Abuts 11 inner walls. The ends of the fixed conductor pieces 14 at both ends (the part closest to the central axis is a sufficient length and has a flat shape substantially parallel to the axis. The pins have substantially the same dimensions as the circles in contact with the tips of the fixed conductor pieces 14 at both ends, as shown by the broken lines in FIG.

Here, since both ends of the fixed conductor piece 14 are fixed between the cylindrical portions 12a and 12b at both ends, the conductor pieces 14 are relatively rigid and less elastic when pressed in the radial direction. Therefore, the inserted pin
It is effectively guided along its flat surface to improve the “prying” resistance of the contact 10. On the other hand, the contact conductor piece 15 is fixed at one end and slidable at the other end, so that it comes into contact with the inserted pin with sufficiently large elasticity. It should be noted that the use of this one-end fixed, other-end sliding contact piece can provide a low insertion force and a sufficient contact pressure without being limited by the material and dimensions used.

Next, a method of manufacturing a receptacle-type contact according to the present invention will be described with reference to FIGS.

FIG. 3 shows a stamped metal plate 12 'forming the inner tubular body 12 of the contact 10 described above. This metal plate 1
2 'is, for example, a copper alloy such as phosphor bronze. The punched metal plate 12 'is formed by alternately forming both ends 12a', 1
Fixed conductor pieces 14a ', 14b' and 14c 'at both ends connecting between 2b' and conductor pieces 15a ', 15b' and 15c 'having one end fixed to 12a' and the other end separated from 12b ', and others. Cut off the part.

Although not shown, the conductor piece 14 'of the stamped metal plate 12'
Are bent in a substantially U shape, and the conductor pieces 15 'are bent in a substantially V shape. Further, by bending both ends 12a 'and 12b' into a substantially circular shape to form a pair of ring-shaped ends, the inner cylindrical body 12 having the contact conductor pieces shown in FIG. 1 is obtained (FIG. 4 (A)). )),
Preferably, as shown in FIG. 4 (A), one end fixed type conductor piece
It is preferable to apply a preload to 15 'by extending its free end 16 by a predetermined amount outward from a circle formed by the cylindrical body 12'.
The conductor pieces in the normal use state are indicated by broken lines.

FIG. 4 (B) shows the shape and relationship between the fixed conductor pieces 14 at one end and the fixed conductor pieces 15 at one end when the inner tubular body 12 'of FIG. 4 (A) is inserted into the outer tubular body 11. It is a model that is shown overlaid on a model. As is clear from the figure, the free end 16 of the conductor piece 15 slidably contacts the inner surface of the outer tubular body 11. Also,
The tip or top of the conductor piece 15 protrudes toward the center from the top of the conductor piece 14. Two kinds of conductor pieces 1 configured in this way
4 and 15 are formed along the circumference of the inner cylindrical body 12.

As described above, the receptacle type contact and the method of manufacturing the same according to the present invention have been described with reference to the accompanying drawings illustrating the embodiments. However, the present invention should not be limited to only such embodiments, and various modifications can be made. Of course. For example, conductor piece 1
The number of 4,15 can be selected as required. The contact conductor piece 15 can be formed in a substantially M-shape if necessary. Therefore, in this specification, the substantially V-shape should be understood to include M or W having a V-shaped portion as a part thereof.

[Effects of the Invention] As can be understood from the above description, according to the receptacle-type contact of the present invention, since the inner cylindrical body has a plurality of U-shaped fixed conductor pieces at both ends in the circumferential direction, it is sufficient. It has strength, effectively guides the inserted round pin, and does not excessively deform the fixed conductor piece at one end. The round pin is contacted by a plurality of one-end fixed conductor pieces with a sufficient contact pressure to obtain highly reliable electrical contact.

Further, since the outer tubular body covers substantially the entire surface of the inner tubular body, the plurality of conductor pieces of the inner tubular body can be effectively protected from deformation due to external force and the like. Furthermore, since there are no protrusions or the like from the outer surface of the outer tubular body, there is no sticking of the contacts or the contact and the wire during handling, and the workability is good. Further, both the inner and outer cylindrical bodies have a remarkable practical effect that they can be manufactured relatively easily and inexpensively by punching and bending a metal plate.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a receptacle type contact according to the present invention. FIG. 2 is an enlarged end view of the first internal tubular body. FIG. 3 is a plan view of a punched metal plate for manufacturing the internal tubular body of FIG. FIG. 4 (A) is a longitudinal sectional view of the metal plate of FIG. 3 machined into a cylindrical shape, and FIG. 4 (B) is the relationship between the two kinds of conductor pieces of the assembled internal cylindrical body and the external cylindrical body. FIG. FIG. 5 is a perspective view showing an example of a well-known receptacle type contact. (Explanation of reference numerals) 10: Receptacle type contact 11: External cylindrical body 12: Internal cylindrical body 14: Fixed conductor piece at both ends 15: Fixed conductor piece at one end 16: Contact part

Claims (1)

(57) [Claims] 1. A receptacle type contact having a substantially cylindrical inner tubular body and an outer tubular body disposed on an outer periphery thereof so as to come into contact with a round pin. A substantially ring-shaped end formed near the insertion end of the shaped pin and at a position away from the insertion end, and a substantially U-shaped connected between the ring-shaped ends and formed at substantially equal intervals in the circumferential direction; A plurality of fixed-end conductor pieces bent at both ends toward the center, and a plurality of substantially V-shaped fixed-end conductor pieces extending between the fixed-end conductor pieces from the ring-shaped end on the insertion end side, A receptacle-type contact, wherein the outer tubular body covers substantially the entire surface of the inner tubular body.