FR2611079A1

FR2611079A1 - Wiping-contact commutator

Info

Publication number: FR2611079A1
Application number: FR8701757A
Authority: FR
Inventors: Guy Metayer; Alain Pedronno
Original assignee: Neiman SA
Current assignee: Valeo Neiman SA
Priority date: 1987-02-12
Filing date: 1987-02-12
Publication date: 1988-08-19

Abstract

The invention relates to a wiping-contact commutator cooperating in succession with at least two non-overlapping conductive tracks, the said contact being returned elastically towards the said tracks and being impressed with a unidirectional circular translational motion with respect to these tracks. The commutator according to the invention is characterised in that the edges 4, 5 of the adjacent ends of two successive tracks 2, 3 are, in the relative direction of rotation T, offset substantially in the direction of return R of the said contact 1 and separated angularly from one another. Application to the automobile industry.

Description

Commutateur à contact frottant
L'invention concerne un commutateur à contact frottant coopérant successivement avec au moins deux pistes conductrices ne se chevauchant pas, ledit contact étant rappelé élastiquement vers lesdites pistes et étant animé par rapport à ces pistes d'un mouvement de translation circulaire unidirectionnel.Friction contact switch
The invention relates to a friction contact switch cooperating successively with at least two non-overlapping conductive tracks, said contact being biased elastically towards said tracks and being driven relative to these tracks in a unidirectional circular translation movement.

Un tel commutateur est utilis-- par exemple pour le contrôle d'un moteur électrique entrainant un actionneur de serrure automobile.Such a switch is used - for example for controlling an electric motor driving an automobile lock actuator.

Le passage du contact d'une piste à la piste suivante présente de nombreux problèmes qui n'ont pas été resolus jusqu'à présent. Le problème le plus délicat consiste à interdire que le contact puisse être en contact simultanément avec les deux pistes tout en évitant de manière sûre une interruption d'alimentation lors du passage d'une piste à l'autre.Switching from one track to the next track presents many problems that have not been resolved to date. The most delicate problem consists in prohibiting that the contact can be in contact simultaneously with the two tracks while surely avoiding an interruption of supply during the passage from one track to the other.

La présente invention vise à résoudre ce problème.The present invention aims to solve this problem.

A cet effet, le commutateur selon l'invention est caractérisé par le fait que les bords des extrémités adjacentes de deux pistes successives sont, dans le sens de rotation relatif, décalées sensiblement dans la direction de rappel dudit contact et écartées angulairement l'une de l'autre.To this end, the switch according to the invention is characterized in that the edges of the adjacent ends of two successive tracks are, in the direction of relative rotation, offset substantially in the return direction of said contact and angularly spaced one of the other.

De préférence, la face arrière dudit contact présente une face plane sensiblement orthogonale à ladite direction de translation circulaire.Preferably, the rear face of said contact has a planar face substantially orthogonal to said direction of circular translation.

Avantageusement, la face avant dudit contact est arrondie vers lesdites pistes. Advantageously, the front face of said contact is rounded towards said tracks.

Le décalage en hauteur des extrémités adjacentes des pistes peut être obtenu en maintenant lesdites extrémités parallèles l'une à l'autre. En variante, l'extrémité de la première piste dans la direction de translation circulaire, est pliée obliquement en direction dudit contact.The offset in height of the adjacent ends of the tracks can be obtained by keeping said ends parallel to one another. As a variant, the end of the first track in the direction of circular translation is folded obliquely in the direction of said contact.

L'invention sera bien comprise å la lecture de la description suivante faite en se référant au dessin annexé dans lequel: - la figure 1 est un schéma représentant les extrémités adjacentes de deux pistes successives et un contact, pour un premier exemple de réalisation de l'invention, et - les figures 2 et 3 sont analogues à la figure 1, pour deux variantes.The invention will be clearly understood on reading the following description made with reference to the appended drawing in which: - Figure 1 is a diagram showing the adjacent ends of two successive tracks and a contact, for a first embodiment of the invention, and - Figures 2 and 3 are similar to Figure 1, for two variants.

Un contact frottant 1 est rappelé dans la direction R sensiblement orthogonalement à deux pistes successives 2 et 3 dans le sens T de translation circulaire relatif du contact 1 par rapport aux pistes 2 et 3.A friction contact 1 is recalled in the direction R substantially orthogonally to two successive tracks 2 and 3 in the direction T of relative circular translation of the contact 1 relative to the tracks 2 and 3.

Conformément à l'invention, le bord 4 de la piste 2 et le bord 5 adjacent de la piste 3 sont décalés angulairement, c'est-à-dire dans la direction T et, en outre, le bord 5 de la seconde piste (dans le sens T) est décalé par rapport au bord 4 de la piste 2 dans la direction R de rappel du contact 1.According to the invention, the edge 4 of the track 2 and the adjacent edge 5 of the track 3 are angularly offset, that is to say in the direction T and, moreover, the edge 5 of the second track ( in direction T) is offset from edge 4 of track 2 in direction R of contact 1 return.

Dans les exemples des figures 1 et 3, la décalage est obtenu en maintenant les extrémités des pistes 2 et 3 parallèles entre elles. Dans l'exemple de la figure 2, l'extrémité 2' de la première piste 2 est pliée obliquement vers le contact 1, c'est-à-dire dans la direction opposée à la direction R. In the examples of Figures 1 and 3, the offset is obtained by keeping the ends of tracks 2 and 3 parallel to each other. In the example of FIG. 2, the end 2 ′ of the first track 2 is folded obliquely towards the contact 1, that is to say in the direction opposite to the direction R.

Le contact R présente une face arrière 6 (dans le sens T) qui est plane et sensiblement orthogonale à la direction T, alors que sa face avant 7 est arrondie vers les pistes 2,3, le contact 1 ayant la forme générale d'un sabot.The contact R has a rear face 6 (in the direction T) which is flat and substantially orthogonal to the direction T, while its front face 7 is rounded towards the tracks 2,3, the contact 1 having the general shape of a shoe.

Dans les figures 1 et 3, le contact 1 est massif. A la figure 2, le contact 1 est constitué par une feuille métallique pliée. La hauteur A de la face arrière du contact est inférieure à la distance -B entre l'arête inférieure du bord 4 de la première piste 2 et l'arête supérieure du bord adjacent 5 de la seconde piste 3.In Figures 1 and 3, contact 1 is massive. In FIG. 2, the contact 1 is constituted by a folded metal sheet. The height A of the rear face of the contact is less than the distance -B between the lower edge of the edge 4 of the first track 2 and the upper edge of the adjacent edge 5 of the second track 3.

Grâce à la disposition selon l'invention, au cours de la translation T, le contact 1 quitte de manière sure et franche la piste 2 et, après avoir quitté cette piste, retombe obligatoirement sur la piste 3, en interdisant un double contact et en évitant toute interruption d'alimentation. Thanks to the arrangement according to the invention, during translation T, contact 1 safely and frankly leaves track 2 and, after leaving this track, necessarily falls back on track 3, preventing a double contact and avoiding any interruption of supply.

Claims

1.- Frictional contact switch cooperating successively with at least two non-overlapping conductive tracks, said contact being biased elastically towards said tracks and being driven relative to these tracks in a unidirectional circular translation movement, characterized in that the edges (4,5) of the adjacent ends of two successive tracks (2,3) are, in the direction of relative rotation (T), offset substantially in the return direction (R) of said contact (1) and angularly separated l one of the other.

2.- Switch according to claim 1, characterized in that the rear face of said contact (1) has a flat face (6) substantially orthogonal to said direction of circular translation (T).

3.- Switch according to one of claims 1 and 2, characterized in that the front face (7) of said contact is rounded towards said tracks (2,3).

4.- Switch according to one of claims 1 to 3, characterized in that the adjacent ends of the successive tracks (2,3) are parallel to each other.

5.- Switch according to one of claims 1 to 3, characterized in that the end of the first track (2) in the direction of circular translation (T) is folded obliquely in the direction of said contact (1).

6.- Switch according to one of claims 1 to 5, characterized in that the height (A) of the rear face (6) of the contact (1) is less than the distance (B) between the edge lower edge (4) of the first track (2) and the upper edge of the adjacent edge (5) of the second track (3).