FR2816453A1 - Improved surface contact electrical contact having smooth end plug section and socket section having wire mesh matching socket part. - Google Patents

Abstract

The electrical contact has two complementary sections (1,3) one pushing into the other. The inner section of one part has a wire mesh (19) with the smooth section of the other part plugging into it.

Description

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Electrical contact with improved contact surface and corresponding electrical connector or electrical connection system.

 The invention relates to an electrical contact with an improved contact surface and to the corresponding electrical connector or electrical connection system.

 Conventional contact cell contacts are known, comprising a male contact part in the form of a cylindrical pin and a complementary female contact part receiving the pin by an internal elastic socket. The socket is a cylindrical socket or "diabolo" applied elastically in a housing of the female contact part. This socket is provided with elastic longitudinal strips applied elastically to the coupling on the male contact pin.

 Relative to this type of contact by socket and pin, the invention aims at an improved contact, which allows in a determined power range to decrease the surface of the contact and therefore the dimensions of the corresponding connector and likewise to reduce the effort of insertion and release of the male part in the corresponding female part.

 Contacts are also known with elastic wires with a longitudinal arrangement, possibly oblique. However, these contacts involve bulky mounting of the contact wires.

 The connector according to the invention is characterized in that one of the complementary contact parts, male or female, comprises a lattice surface or the like received in a smooth surface of the other.

 Thus, either the contact pin or the complementary contact socket can have a lattice contact surface applied to one smooth surface complementary to the other.

 Said lattice surface may be a layer of interlaced or juxtaposed conductive metal wires, in cylindrical shape and applied in a housing complementary to the contact element, pin or socket.

 This layer may come from turns of son of elastic polygonal shape compressed in interlacing or juxtaposition and applied by force, with slight deformation, in their housing.

 Said polygonal shape can be regular, for example octagonal, thus balancing the tension of the thread on the periphery of the

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 trellis layer, the corner lines of the polygon constituting the points of contact with the smooth surface of the complementary contact part.

 It follows from this arrangement that, relative to contact by conventional cell, a lattice contact surface considerably increases the number of contact points on the contact surface used, on coupling, with consequently a current transport capacity. increased. In addition, the effort of insertion to the contact coupling, as well as that of extraction are less.

 Naturally, one can play on the number of contact points coming from the angles of the polygon, by tightening the trellis (increase in the number of turns), or by taking polygonal turns comprising more angles. The contact pressure can also be varied.

 In addition, the angular edge of the angles can be more or less rounded to projecting.

- la figure 2 est une vue en coupe axiale de l'élément femelle du contact ; - la figure 3 est une vue du fil constitutif de la couche en treillis avant sa mise en place, et - la figure 4 est une vue analogue à la figure 1 d'une variante de réalisation. The invention is illustrated below with the aid of exemplary embodiments and with reference to the appended drawings in which: - Figure 1 is a perspective view of a contact according to the invention in the out-of-service position;

- Figure 2 is an axial sectional view of the female element of the contact; - Figure 3 is a view of the constituent wire of the trellis layer before its establishment, and - Figure 4 is a view similar to Figure 1 of an alternative embodiment.

 The contact shown in Figure 1 is intended to be applied to an electrical connector or any other electrical connection system. It is a contact of cylindrical conformation. It comprises a male element or contact pin 1 and a female element 3 in the form of a sleeve receiving axially inside the contact pin 1.

 The contact pin 1 is conventional, comprising a cylindrical front portion 5, the end of which is tapered, in a truncated cone. This portion 5 is made of electrically conductive metal, copper for example.

 The female part or sleeve 3 is also cylindrical, comprising an inner bore 7 open towards the front and thanks to which it receives the contact pin 1 axially. This bore 7 has a diameter slightly greater than the contact pin 1. It has a

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 mattress 9 of electrically conductive metal wire fixed in a housing 11 (FIG. 2) formed in its wall. This mattress 9 has a cylindrical conformation. Its internal diameter is close to that of pin 1 to allow its insertion inside with contact tightening. This mattress 9 is immobilized in its housing 11, which consists of a cylindrical recess formed substantially in the front part of the bore 7 and, more precisely, from an edge 13 slightly recessed from its front end to substantially half the length. of the bore.

 The mattress 9 is made from an electrically conductive metal wire 15 (FIG. 3) with elastic deformation and put into identical turns 17 and slightly spaced apart axially from one another. In the present case, the turns 17 have been given a regular octagonal conformation but this can naturally be variable, polygonal and therefore with angular edges or even wavy circular, etc.

 The coil wire 15 is deformed by contraction to be mounted in its housing 11, inside the female sleeve 3. It is held in its housing by its own elastic extension inside the recess, being stopped by the end edges of the housing. The turns 17 are thus tightened one on the other and become entangled to form a regular lattice surface 19.

 This lattice surface 19 receives on coupling the contact pin 1 according to a multitude of contact points 21 formed by the irregularities projecting from the surface.

 It should be noted that the edges of the polygons juxtaposed with the turns can advantageously be offset to distribute the contact points around the current-emitting and receiving part, so as to better distribute the wear and the electronic flux on the transfer transfer surface. current. It is also possible to adjust the contact pressure to a variable level according to the tightening of the polygons.

 The Applicant's tests have shown that the contact described has a capacity equivalent to a conventional cell contact, with the contact surface divisible by three and likewise the insertion and release force is divisible by two. It follows that a connector comprising one or more contacts according to the invention can be shaped with dimensions smaller than those of the connector corresponding to conventional cell and include greater ease.

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 use.

 An alternative embodiment is shown in FIG. 4. Parts similar to those of the previous embodiment bear a prime index. In this connector, the arrangement of the lattice surface 19 ′ has been reversed relative to the previous embodiment, by placing this lattice surface 19 ′ on the pin of the connector 1 ′, on the periphery thereof, while the complementary socket 3 ′ has a smooth cylindrical spindle receiving hole (not shown).

 The lattice surface may optionally be a woven layer of metal wire disposed on the socket or the pin.

 Finally, the contact section is of variable conformation and for example can be flattened.

Claims (8)

 CLAIMS 1. Electrical contact comprising two complementary contact parts (1, l;; 3.3 '), characterized in that one of said complementary contact parts comprises a lattice or similar surface (19,19') received in one smooth surface on the other.  2. Electrical contact according to claim 1, characterized in that said lattice surface (19,19 ') is a layer (9) of conductive metallic wires (15) interlaced or juxtaposed, in cylindrical shape, applied in a complementary housing ( 11) of the contact element, pin (1, 1 ') or socket (3.3').  3. Electrical contact according to claim 2, characterized in that said layer (9) comes from turns (17) of son of elastic polygonal shape, compressed in interlacing or juxtaposed and applied by force, with slight deformation, in the housing ( 11).  4. Electrical contact according to claim 3, characterized in that said polygonal shape is regular, for example octagonal, thus balancing the tension of the wire on the periphery of the layer (9), the corner lines of the polygon constituting the points of contact (21) with the smooth surface of the complementary contact part.  5. Electrical contact according to one of claims 3,4, characterized in that the angular edge of the turns (17) of the polygon is more or less rounded to projecting.  6. Electrical contact according to claim 2, characterized in that said wires (15) are wavy.  7. Electrical connector comprising at least one electrical contact as claimed from 1 to 6.  8. Electrical connection system comprising at least one electrical contact as claimed from 1 to 6.