JPH03236175A - Socket type contact - Google Patents

Abstract

PURPOSE:To obtain excellent elasticity at contact sections, reduce the inserting/ removing force of a pin, and adequately adapt a socket type contact to a multi- pole connector by boring slots on en elastic metal plate, forming the metal plate into a nearly cylindrical shape, and providing multiple contact pieces with a cantilever structure. CONSTITUTION:A conducting metal plate-shaped body made of a copper alloy has nonlinear U-shaped or dog-legged contact pieces 22a-22e connected at both end sections 21a, 21b provided nearly in parallel. Protruded contact sections 23a-23e are formed at the center section of the contact pieces 22a-22e, base sections of the contact pieces 22a-22e and contact sections serve as cantilevers separated by a distance L although both ends are fixed, contact sections 23a-23e and a pin P are brought into contact with sufficient elasticity, and the inserting/ removing force is sufficiently reduced. This plate-shaped body is machined into a cylinder shape as a socket type contact, it can be adequately adapted to a multi-pole connector in particular when many contacts and pins must be concurrently inserted or removed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to socket-type contacts, and in particular to socket-type or receptacle-type electrical contacts for contacting circular conductive bottles.

[Prior art and its problems]

There are two types of conductive bottles, one with a substantially rectangular cross section and the other with a circular cross section. The former is easy to process or manufacture, but has directionality. That is, since it has four contact surfaces, it must be installed so that these contact surfaces are oriented in a predetermined direction with respect to the receptacle (socket) contact. On the other hand, although the latter is somewhat difficult to process and manufacture, it is advantageous in use because it has no directionality.

Various types of socket-type contacts have been proposed that use one or more circular conductive bottles. It is made to protrude inward of the cylindrical body by drawing process and makes electrical contact with the outer periphery of a circular pin inserted inside (see Fig. 5).In other words, the contact portion is formed around the almost complete circumference of the cylindrical body. However, since such socket-type contacts require relatively large insertion and removal forces, they have the disadvantage of being difficult to insert and remove when applied to connectors having a large number of pins.

Therefore, many attempts have been made to reduce the insertion and removal force between such socket-type contacts and pins. An example of this is to form a number of slofts on the outer periphery of a cylindrical body that forms a socket-type contact, so that the contact portion is not continuous around the entire periphery of the cylindrical body, but is formed in the form of multiple contact points. . That is, a developed view of the cylindrical socket (more precisely, the plate-like body I before being processed into a cylindrical shape) is shown at both substantially parallel ends or base portions 10a- of the conductive plate-like body 1, as shown in FIG. 6(A). Connection piece 1) a, llb, , , , which becomes a plurality of contact pieces between 1Ob
lln, this is processed into a cylindrical shape, and the substantially central portion of the connecting piece 1) is bent and protruded inward of the circumferential body to form contact portions 12a, 12b, . . . , 12n. In other words, a plurality of parallel slots 13a, 13b, . . . are formed in a conductive plate-like body forming a cylindrical body. Alternatively, by sequentially displacing the positions of the parallel slots 14 formed in the plate-shaped body 2 as shown in FIG. 6<8), the connecting pieces 15a, 15b, , 15 between the throwers 14
It has previously been proposed to sequentially displace the contact portion at the approximate center of n from the end of the plate-like body 2 (Japanese Patent Application No. 1-294057).
(see issue). As a result, when a socket-type contact is made into a cylindrical shape, the distance from the pin insertion end to each contact part changes, making it possible to reduce the pin insertion and removal force (insertion and removal force) to some extent. Become.

However, even with such socket-type contacts, it is difficult to reduce the insertion/extraction force to the low value required for recent multi-terminal connectors. This is because if the metal plates 1 and 2 forming the socket are made too thin, they will lack strength and holding power, and will not be able to withstand repeated insertion and removal.

If the socket-type contact having the above-mentioned structure cannot achieve the specified performance, each contact piece may be attached to both bases 10 of the metal plate 1.2.
This is because the contact piece is formed in a substantially straight line between a and 10b and has a structure in which both ends are fixed, so that sufficient elasticity cannot be imparted to the contact piece.

Accordingly, an object of the present invention is to provide a socket-type contact that has sufficient pin holding strength and allows the pin insertion/extraction force to be sufficiently low, and is suitable for a multipolar connector.

Another object of the present invention is to have a plurality of contact pieces at different angular positions on the outer periphery of the cylindrical body, and to provide a plurality of contact parts at these selected angular positions to ensure reliable and highly reliable electrical connection with the pin. It is an object of the present invention to provide a socket type contact with low insertion/extraction force that can be used.

[Means and actions to solve the problem]

In order to solve the above-mentioned technical problem, according to the socket-type socket of the present invention, a non-linear shape, that is, a substantially "dog" shape, a "0" shape, a "C" shape, etc., is formed from the corresponding positions of the substantially parallel ends. A metal plate-like body having a plurality of connection or contact pieces is formed into a substantially cylindrical shape, and the approximate center of the connection piece is displaced inward of the cylindrical body to form a plurality of individual contact parts. With this configuration, even if each contact piece is fixed at both ends, there is a certain degree of distance between the joints with both ends and the contact areas, so it acts as a cantilever and strengthens its elasticity. Low insertion and removal forces are achievable.

According to another socket-type contact of the present invention, a metal plate-like body in which a cantilever-like contact piece is formed on one side or both sides of the linear connecting piece between the two ends or between the connecting pieces is formed into a cylindrical shape. Form. According to the socket-type contact having such a configuration, since the contact piece has a cantilever shape, sufficient elasticity can be obtained even when the elasticity of the metal plate-like body is low.

According to still another socket-type contact of the present invention, cantilever-shaped contact pieces each having a plurality of contact portions are formed at different angle portions of the outer periphery of the cylindrical socket-type contact. The cantilever shape allows for low insertion/extraction forces, and the presence of multiple contact portions at each angular position allows for highly reliable electrical contact between the socket and the pins.

〔Example〕

Hereinafter, various embodiments of the socket-type contact of the present invention will be described in detail with reference to the accompanying drawings.

Figures 1 (A), (B), and (C) are a front view, a left side view, and a developed view of the first embodiment of the socket-type contact of the first invention, or the punching process used to manufacture it. FIG. However, for the sake of explanation,
The scale of each drawing is not the same.

As is clear from FIG. 1(A), this socket-type contact 20 has end portions (or base portions) 21a-21b machined into a cylindrical shape with a radius between the grooves. This contact 20
has a plurality of connecting pieces/contact pieces 22 that connect both end portions 21a and 21b. In this predetermined embodiment, five connecting pieces/contact pieces (hereinafter simply referred to as contact pieces) 22a to 22e are provided on the outer periphery of the cylindrical body. Each contact piece 22a-22e
The contact portion 23a23e is formed by being inclined from both ends toward the inside of the cylindrical body, that is, in the direction of the central axis, and by protruding an approximately central portion inward in an arc shape with a relatively small radius. These contact portions 23a-23e are in electrical contact with the outer surface of a circular pin (indicated by a broken line P in FIG. 1B) that is inserted into this socket-type contact from one direction (for example, from the left).

Such a socket-type contact 20 is generally made by bending a conductive metal plate 24 made of a punched sheet of copper or a copper alloy, as shown in FIG. 1(C).
and form it. As is clear from the figure, the metal plate 24
have five substantially equal contact pieces 22a to 22e that are non-linear and have a substantially U-shape, which are joined at corresponding positions on both substantially parallel end portions 21) 41b. Protruding contact portions 23 a - 23 e are formed in the center of each contact piece 22 . Each contact piece 22
The joint portion and the contact portion 23 with the end portion or base portion 21a-21b of
As shown in the figure, each contact piece 22 has the property of a cantilever corresponding to this distance, even though both ends are fixed. the result,
The contact portion 23a23e and the pin are in contact with each other with sufficient elasticity, and a sufficiently low insertion/extraction force can be obtained. When this metal plate-like body 24 is bent and processed into a cylindrical shape (an awning), as shown in FIG.
A slight seam 25 occurs as shown in B).

The shape of each contact piece of the first socket type contact piece of the present invention does not necessarily have to be U-shaped as shown in the embodiment of FIG. That is, since it is sufficient to connect a pair of parallel ends with a plurality of non-linear contact pieces, even if the shape is approximately C-shaped or doglegged as shown in FIGS. 2(A) and (B), good.

Of course, the number of contact pieces can also be selected to be two, preferably three or more.

Next, a second socket type contact of the present invention will be explained with reference to FIG. The second socket-type contact enhances elasticity by making each contact piece completely cantilevered,
This is intended to further reduce the force required to insert and remove the pin.

FIGS. 3(A) and 3(B) are developed views of such a second socket-type contact or plan views of different embodiments of the metal plate-like body from which it is manufactured. First, in FIG. 3(^), the metal plate-like body 30 has a pair of substantially parallel end portions 31a and 31b, and a plurality of connecting pieces 32a and 32b are connected therebetween.

, , , connect with 32n. Furthermore, 1@ of the connecting piece 32
Cantilever-shaped contact pieces 33a, 33b, .
.

33n is formed. The vicinity of the free end of each contact piece 33 is defined as a contact portion 34. The metal plate-like body 30 is formed into a substantially cylindrical shape as in the case of FIG. Each connecting piece 32 may be substantially flush with the end 31, but the contact piece 33 may be sloped inwardly towards the free end, and the contact piece 34 may be bent, for example, into a spoon shape, so that the outer circumference of the pin is Make contact with the surface.

On the other hand, in the embodiment shown in FIG. 3(8), the embodiment shown in FIG.
), but the connecting piece 32° between the pair of substantially parallel ends 31a' and 31b' of the metal plate 30'
and the contact piece 33' are completely separated. That is,
Each contact piece 33' has a cantilever shape between adjacent connecting pieces 32', projecting from one end, for example, 31a' side to the other 31b' side, and has a contact portion 34' near its free end.
is formed.

Furthermore, a third socket-type mount tact according to the present invention will be explained with reference to FIG. This third socket type contact has a plurality of contact portions in the direction of insertion of the pin, and is intended to achieve low insertion/extraction force as well as reliable and highly reliable electrical contact with the pin.

FIG. 4(A) shows the expanded portion of the socket type contact of the first preferred embodiment or the flat surface of the metal plate 40 used for manufacturing the same. This plate-like body 40 has two substantially linear connecting pieces 42a between parallel end portions 41a and 41b,
42b. A pair of cantilever-shaped contact pieces 43 are provided on both sides near the center of the connecting piece 42 and extend away from the connecting piece 42 toward the ends 41a and 41b, that is, approximately parallel to the connecting piece 42.
．． It has 44. Contact portions 45,46 are formed near both free ends of each contact piece 43,44. The metal plate-like body 40 is formed into a cylindrical shape, and the contact portion 4 of the contact piece 4344 is formed into a cylindrical shape.
By protruding 5.46 inward, a socket-type contact can be obtained that makes contact at 8 of the 4 divided positions on the outer periphery of the bottle. It is preferable that the free ends of each of the contact pieces 43 and 44, especially the free end on the side where the bottle is inserted, be sufficiently bent outward to prevent collision damage when the bottle is inserted.

FIG. 4(B) is a modification of FIG. 4(A), in which the connecting piece 4
Instead of increasing the number of connecting pieces 42" (doubling to four in this particular embodiment), contact pieces 43° are formed on only one side of each connecting piece 42".The rest of the structure remains essentially the same. be.

Moreover, FIG. 4(C) is a further modification of FIG. 4(B), in which the contact pieces 43'' and 44'' are configured separately from the connecting piece 42°, and each end portion 41a-41b is connected to the other. It has a cantilever shape extending in the opposite direction. Each contact piece 43''.

Two contact portions 45'' and 46'' are formed by protruding inwardly near the free ends of 44''.

The third socket-type contact formed using these metal plates 40, 40', 40'' is bidirectional, and the same low insertion and removal is achieved no matter which side of the socket-type contact the pin is inserted into. A strong and good electrical contact can be obtained.

The three types of socket-type electrical contacts according to the present invention, the first, second and third, have been described above, together with a plurality of embodiments or modifications thereof. However, those skilled in the art will understand that the present invention is not limited to these embodiments, and that various modifications and changes can be made without departing from the spirit thereof. For example, the number of connecting pieces and contact pieces can be freely selected. Further, the insertion/extraction force can be further reduced by sequentially displacing (staggering) the positions of each contact portion in the axial direction of the cylindrical body little by little. Furthermore, Figure 3 (B
The contact pieces 33° shown in ) may be configured to extend alternately from opposite sides of the connecting portion 31.

Further, in the socket type contact of the third invention, FIG.
C) or the connecting pieces 22.22°22'' in FIGS. 2(A) and 2(B) may be formed into a W-shape or a zigzag shape, and contact portions may be formed at a plurality of bending points thereof.

〔Effect of the invention〕

As can be understood from the above description, since the socket type contacts of the first to third inventions all have a plurality of contact pieces having a cantilever structure, the elasticity of the contact portion is excellent, and as a result, the insertion/extraction force with the bottle is reduced. This is particularly suitable for application to multi-pole connectors in which a large number of contacts and pins need to be inserted or removed at the same time.

In addition, the first socket-type contact is bidirectional, and the bottle can be inserted and removed from either side of the cylindrical body, and a bottle guide surface can be formed, so the tip of the bottle comes into contact with it when it is inserted. There is no risk of deforming or destroying the parts. Since the structure is simple, manufacturing is easy and can be done at low cost.

On the other hand, since the second socket-type contact has a cantilever-like contact piece with sufficiently long arms, a desired insertion/extraction force can be obtained. Although the insertion direction is limited, the bottle can be inserted and removed smoothly without deforming the contact portion.

Furthermore, the third socket-type contact has a plurality of contact portions in the direction of insertion of the bottle and makes contact at a plurality of contact points, so that it is characterized in that good and highly reliable electrical contact can be obtained.

[Brief explanation of drawings]

1 and 2 are explanatory diagrams of the socket type contact of the first invention, and FIGS. 1 (A>, <8) and (C) are a front view, a side view, and a developed view of the first embodiment, FIGS. 2A and 2B are developed views of the second and third embodiments, respectively. FIGS. 3A and 3B are developed views of the first and second embodiments of the socket-type contact of the second invention. FIGS. 4(A), 4(B) and 4(C) are exploded views of the first, second and third embodiments of the socket type contact of the third invention, respectively. FIG. 5 is a model diagram showing a conventional socket-type contact and a pin inserted into the contact, and FIGS. 6(A) and (B) are developed views of the conventionally proposed socket-type contact. 21, 31.41-, ..., end 22, 32.42, ..., connection piece 22 33
43, 44, contact piece 23 34 45, 46
,,, Contact part (A) (B) E1ε? (A) (B) IC3

Claims (3)

[Claims] (1) A conductive plate-like body having a plurality of contact pieces non-linearly connecting substantially corresponding positions of both substantially parallel ends is formed into a substantially cylindrical shape, and the substantially central part of each contact piece is connected to the A socket-type contact characterized by having a contact portion protruding inward from a cylindrical body. (2) A conductive plate-like body having a plurality of connecting pieces connecting corresponding positions of substantially parallel ends, and a plurality of contact pieces formed in a cantilever shape from the connecting pieces or the both ends. A socket-type contact, characterized in that it is formed into a substantially cylindrical shape, and the free end of the contact piece projects inward of the cylindrical body to serve as a contact portion. (3) A conductive plate shape having a plurality of connecting pieces that connect substantially parallel ends to each other, and a plurality of contact pieces formed from the connecting piece or the end in a direction perpendicular to the end. A socket characterized in that the body is formed into a substantially cylindrical shape, the contact piece projects inward of the cylindrical body, and contact portions are formed at different positions in the axial direction along the outer periphery of the cylindrical body. type contact. L