FR2508229A1 - Multi-contact bi-directional rotating shaft switch - has assembly of three ball bearings which roll onto slots above printed circuit board contact points with pressure maintained by plate - Google Patents

Multi-contact bi-directional rotating shaft switch - has assembly of three ball bearings which roll onto slots above printed circuit board contact points with pressure maintained by plate Download PDF

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Publication number
FR2508229A1
FR2508229A1 FR8112302A FR8112302A FR2508229A1 FR 2508229 A1 FR2508229 A1 FR 2508229A1 FR 8112302 A FR8112302 A FR 8112302A FR 8112302 A FR8112302 A FR 8112302A FR 2508229 A1 FR2508229 A1 FR 2508229A1
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FR
France
Prior art keywords
contact
plate
switch
switch according
crown
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
FR8112302A
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French (fr)
Inventor
Serge Marcel Regnault
Louis Jacques Maurice Chretien
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jaeger SA
Original Assignee
Jaeger SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jaeger SA filed Critical Jaeger SA
Priority to FR8112302A priority Critical patent/FR2508229A1/en
Publication of FR2508229A1 publication Critical patent/FR2508229A1/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/54—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having at least five or an unspecified number of operative positions
    • H01H19/56—Angularly-movable actuating part carrying contacts, e.g. drum switch
    • H01H19/58—Angularly-movable actuating part carrying contacts, e.g. drum switch having only axial contact pressure, e.g. disc switch, wafer switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/16—Contacts characterised by the manner in which co-operating contacts engage by abutting by rolling; by wrapping; Roller or ball contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/02—Details
    • H01H19/10—Movable parts; Contacts mounted thereon
    • H01H19/11—Movable parts; Contacts mounted thereon with indexing means

Abstract

The bi-directional switch is based on a cylindrical barrel (1) with an axial switch shaft (12) passing through it. A bearing plate (3) has a cylindrical hub (14) over which fits a spiral spring. The spring forces the bearing plate down on a disc (5) which three symmetrically disposed holes (15) in its periphery. Ball bearings (4) sit in the holes and ride around with the switch shaft-disc assembly. A flexible metal membrane (6) has two groups of three tongues which overlap contact points on a flexible or rigid printed circuit board (10). A locating disc (8) has chamfer-edge slots which allow the ball bearings to ride up into the contact positions as they are rotated with the switch shaft. The locating disc is fixed. When the shaft is rotated, the three ball bearings are rolled, without sliding, from one position to the next in the groups of three contacts. Six contact positions are possible. The end of the shaft (16) fits into a bearing hole in the base-plate of the switch.

Description

La présente invention concerne les commutateurs rotatifs à rotation bidirectionnelle et plus particulièrement, un commutateur permettant d'avoir, sous un faible encombrement, un nombre important de contacts francs et stables. The present invention relates to rotary switches with bidirectional rotation and more particularly, a switch allowing to have, under a small footprint, a large number of frank and stable contacts.

On connatt déjà des commutateurs rotatifs dont Itindexage des positions est réalisé par un système à billes tandis que les contacts se font par l'intermédiaire de balais ou de galets frottant sur une piste. Rotary switches are already known, the positions of which are indexed by a ball system while the contacts are made by means of brushes or rollers rubbing on a track.

Pour diminuer l'encombrement, limiter l'usure due aux frottements et obtenir une plus grande douceur de manoeuvre, la présente invention propose la réalisation d'un commutateur dans lequel les billes ou tous autres organes roulants servent à la fois de moyen d'indexation et de contact.To reduce the size, limit wear due to friction and obtain greater maneuverability, the present invention proposes the production of a switch in which the balls or any other rolling members serve both as an indexing means and contact.

Pour ce faire, ledit commutateur comporte une partie mobile solidaire d'un axe de rotation actionné par une molette, composée d'une platine d'entraînement et d'une cage dans les logements de laquelle sont placés des organes roulants sur lesquels la platine est maintenue en pression par au moins un ressort, et une partie fixe composée d'une couronne de détrompage munie d'autant de logements que de contacts à assurer dans lesquels aboutissent des contacts reliés aux circuits électriques à commander et qui recoivent les organes roulants entraînés par la platine et circulant sur ladite couronne. To do this, said switch comprises a movable part secured to an axis of rotation actuated by a thumb wheel, composed of a drive plate and a cage in the housings of which are placed rolling members on which the plate is maintained in pressure by at least one spring, and a fixed part composed of a keying ring provided with as many housings as there are contacts to be secured in which lead contacts connected to the electrical circuits to be controlled and which receive the rolling elements driven by the plate and circulating on said crown.

Les figures annexées, en regard de la description qui va suivre, permettront de mieux comprendre l'invention et en feront ressortir d'autres particularités :
- la figure 1 est une vue en coupe des divers éléments du commutateur. The appended figures, opposite the description which follows, will allow a better understanding of the invention and will bring out other particularities:
- Figure 1 is a sectional view of the various elements of the switch.

- la figure 2 est une vue en coupe du commutateur monté. - Figure 2 is a sectional view of the mounted switch.

- la figure 3 est une vue en plan de la cage. - Figure 3 is a plan view of the cage.

- la figure 4 est une vue en plan de l'ensemble pièce de contact et couronne de détrompage. - Figure 4 is a plan view of the contact part and polarization ring assembly.

- les figures 5, 6, 7 et 8 représentent des variantes du dispositif. - Figures 5, 6, 7 and 8 show variants of the device.

Une molette 1 (fig. 1 et 2) comporte un canon interne 13 traversé par un axe 12, lequel est engagé également dans le canon 14 d'une platine 3 et dans un ressort 2 placé en appui élastique sur les portes constituées par les canons 13 et 14. A thumb wheel 1 (fig. 1 and 2) comprises an internal barrel 13 crossed by an axis 12, which is also engaged in the barrel 14 of a plate 3 and in a spring 2 placed in elastic support on the doors formed by the barrels 13 and 14.

L'axe 12 traverse également une cage 5 dans laquelle sont prevus des logements 15 disposés à 1200 les uns des autres, (fig. 3) pour recevoir des billes 4.The axis 12 also passes through a cage 5 in which are housed 15 housed at 1200 from one another (fig. 3) for receiving balls 4.

L'extrémité étrécie 16 de l'axe 12 est engagée successivement dans, une pièce de contact 6, une couronne/7 elle-même logée dans l'orifice coopérant d'une couronne 8 de detrompage , une platine de circuit imprimé 10, souple ou rigide et finalement introduit dans le trou borgne 17 d'une plaque de fermeture 11.The narrowed end 16 of the axis 12 is successively engaged in, a contact piece 6, a ring / 7 itself housed in the cooperating orifice of a keying ring 8, a printed circuit board 10, flexible or rigid and finally introduced into the blind hole 17 of a closure plate 11.

La pièce de contact 6 comporte (fig. 4) deux séries de languettes de contact 18a, 18b, 18c et l9a, 19b, 19c. Les languettes d'une même serie sont disposées à 400 l'une par rapport à l'autre et chacune eFt diamétra lement opposée à la languette homologue de la seconde serie. La couronne 8 de détrompage possède deux séries de logements 20a, 20b, 20c et 21a, 21b, 21c dont les cotés sont chanfreinés en forme de rampe 24. Ces logements sont disposés de façon identique à celledes languettes de la pièce de contact laquelle est montée par rapport à la couronne 8 de manière à faire correspondre chacune des languettes avec son logement coopérant.De même, le circuit imprimé 10 possède deux séries de plots de contact 9a, 9b, 9c et 22a, 22b, 22c disposés de fanon identiques à celle des logements de la couronne 8 pour que chacun des plots se trouve au dessous du logement correspondant.The contact piece 6 comprises (fig. 4) two series of contact tabs 18a, 18b, 18c and l9a, 19b, 19c. The tongues of the same series are arranged at 400 relative to each other and each is diametrically opposite to the homologous tongue of the second series. The keying ring 8 has two series of housings 20a, 20b, 20c and 21a, 21b, 21c, the sides of which are chamfered in the form of a ramp 24. These housings are arranged identically to the tabs of the contact piece which is mounted. relative to the crown 8 so as to make each of the tongues correspond with its cooperating housing. Similarly, the printed circuit 10 has two series of contact pads 9a, 9b, 9c and 22a, 22b, 22c arranged with dewlap identical to that housings of the crown 8 so that each of the studs is below the corresponding housing.

Lorsque le système est en place, (fig. 2), l'ensemble formé par la pièce de contact 6, la couronne de contact 7, la couronne de détrompage 8 et le circuit imprimé 10 est maintenu en position fixe par la portée 23 de l'axe 12, tandis que l'ensemble platine 3 - cage 5 est entratné en rotation par le mouvement de l'axe 12 provoque par la rotation de la molette 1. Le contact électrique est établi entre la pièce 6, la couronne 7 et le circuit imprimé 10. When the system is in place (fig. 2), the assembly formed by the contact piece 6, the contact ring 7, the polarization ring 8 and the printed circuit 10 is held in a fixed position by the bearing 23 of the axis 12, while the plate 3 - cage 5 assembly is rotated by the movement of the axis 12 caused by the rotation of the wheel 1. The electrical contact is established between the part 6, the crown 7 and the printed circuit 10.

La platine 3 sur laquelle s'exerce l'action du ressort 2 maintient les billes 4 en pression sur l'ensemble fixe. La rotation de la platine 3 entrasse les billes 4 qui roulent sur la couronne 8 tout en restant posi tionnées à 1200 les unes par rapport aux autres par la cage 5. La figure 4 represente le système dans une position stable. La bille 4a est au bas de la rampe 24, dans le logement 20b de la couronne 8, elle appui sur la languette 18b qui établit, de ce fait, le contact avec le plot 9b. Du fait de la différencie angulaire existant entre la position des billes et celle des logements de la couronne 8. Les deux autres billes 4b et 4c ne sont pas en position travail, au fond d'un logement, mais sur le chemin de roulement de la couronne 8.Pour un bon fonctionnement du commutateur, il est nécessaire qu'il y ait au moins deux billes menantes roulant sur une surface plane pour permettre l'extraction de la ou des billes menées des logements de la couronne. On voit que l'ensemble formé des billes et desdits logements sert à la foins, à l'indexage des positions de contact et au contact lui-même, ce qui permet une réduction des pièces necessaires.The plate 3 on which the action of the spring 2 is exerted keeps the balls 4 under pressure on the fixed assembly. The rotation of the plate 3 collects the balls 4 which roll on the crown 8 while remaining positioned at 1200 relative to each other by the cage 5. FIG. 4 represents the system in a stable position. The ball 4a is at the bottom of the ramp 24, in the housing 20b of the crown 8, it presses on the tongue 18b which therefore establishes contact with the pad 9b. Because of the angular differentiation existing between the position of the balls and that of the housings of the crown 8. The other two balls 4b and 4c are not in the working position, at the bottom of a housing, but on the raceway of the crown 8.For the switch to work properly, there must be at least two driving balls rolling on a flat surface to allow the extraction of the driven ball (s) from the housings of the crown. It can be seen that the assembly formed by the balls and said housings is used for hay, for indexing the contact positions and for the contact itself, which allows a reduction in the parts required.

Si. la rotation s'effectue dans le sens des aiguilles d'une montre, c'est ensuite la bille 4b qui viendra en position contact dans le logement 21c après une rotation de 200 de l'axe 12 puis la bille 4a dans le logement 20a, la bille 4b dans le logement 21b, la bille 4c dans le logement 20c et ainsi de suite. Si le mouvement de l'axe 12 a lieu dans le sens inverse, c'est la bille 4c qui viendra dans le logement 21a, puis la bille 4a dans le logement 20c etc... On établit donc successivement, avec trois contacts mobiles six circuits différents pour une rotation de la molette de 3600. If. The rotation is carried out in a clockwise direction, it is then the ball 4b which will come into contact position in the housing 21c after a rotation of 200 of the axis 12 then the ball 4a in the housing 20a, the ball 4b in the housing 21b, the ball 4c in the housing 20c and so on. If the movement of the axis 12 takes place in the opposite direction, it is the ball 4c which will come into the housing 21a, then the ball 4a in the housing 20c etc. We therefore establish successively, with three movable contacts six different circuits for a rotation of the dial of 3600.

La platine 3 est en appui élastique sur les billes, de sorte qu'elles tournent librement dans les logements 15 de la cage 5 et roulent sans frottement sur la couronne 8, accomplissant un demi-tour sur elles-même en un tour de molette.The plate 3 is in elastic support on the balls, so that they rotate freely in the housings 15 of the cage 5 and roll without friction on the crown 8, performing a half-turn on themselves in one turn of the dial.

Des variantes du dispositif tel qu'il vient d'être décrit sont représentées sur les planches IV et V. Variants of the device as just described are shown on plates IV and V.

L'une d'elle (fig. 5) consiste à remplacer les plots de contacts soudés sur le circuit 10 par des plots épaulés 30 chasses dans la couronne de détrompage 8. Le système etant en pression, le circuit 10 est maintenu entre ces plots et une couche de mousse 25. La pièce de contact est supprimée et la polarité est ramenée par une rondelle 26 foxée sur la platine 3 qui se trouve en contact avec les billes 4 réalisées en matériau conducteur, et l'axe 12 maintenu en pression sur le circuit 10. Dans une autre variante (fig. 7 et 8) la couronne de détrompage 27 sert également de rondelle de contact. Pour ce faire elle comporte des chemins conducteurs 28 déterminant les positions de contact des billes 4, toujours conductrices.One of them (fig. 5) consists in replacing the contact pads welded on the circuit 10 with stepped studs 30 driven into the coding ring 8. The system being under pressure, the circuit 10 is held between these pads and a layer of foam 25. The contact piece is eliminated and the polarity is brought back by a washer 26 foxé on the plate 3 which is in contact with the balls 4 made of conductive material, and the axis 12 kept under pressure on the circuit 10. In another variant (fig. 7 and 8) the coding ring 27 also serves as a contact washer. To do this, it includes conductive paths 28 determining the contact positions of the balls 4, always conductive.

Dans tous les cas, le ressort de pression médian peut être remplacé par une pluralité de ressort 29 (fig. 6). De même les billes peuvent être remplaces par des rouleaux ou tout autre élément analogue.In all cases, the median pressure spring can be replaced by a plurality of springs 29 (fig. 6). Similarly, the balls can be replaced by rollers or any other similar element.

Bien entendu le nombre de position d'indexage et de contacts peut être modifie par utilisation d'un nombre différent de contacts fixes et mobiles. Les limitations sont d'ordre technologique : il est nécessaire d'avoir toujours au moins deux billes menantes, d'autres part le diamètre d'encombrement détermine une limite maximale du nombre des billes et des contacts fixes, de même la réalisation sérigraphique des contacts portés par le circuit imprimé ; en outre, l'angle de rotation entre deux positions de contacts de la molette ne doit pas être trop faible afin de permettre un bon indexage de ces positions.  Of course, the number of indexing positions and contacts can be modified by using a different number of fixed and mobile contacts. The limitations are technological: it is necessary to always have at least two driving balls, on the other hand the overall diameter determines a maximum limit on the number of balls and fixed contacts, likewise the screen printing of the contacts carried by the printed circuit; in addition, the angle of rotation between two contact positions of the dial must not be too small in order to allow good indexing of these positions.

Claims (7)

REVENDICATIONS 1 - Commutateur rotatif à rotation bidirectionnelle dans lequel la fonction d'indexage et de contact est assurée par le même élé- ment, du type dans lequel une molette entrain un axe de rotation, 1 - Rotary switch with bidirectional rotation in which the indexing and contact function is provided by the same element, of the type in which a thumb wheel drives an axis of rotation, Caractérise en ce qu'il comporte une partie mobile solidaire de l'axe de rotation composée d'une platine d'enralnement 3 et d'une cage 5 dans les logements de laquelle sont placées des organes roulants 4 sur lesquels la platine est maintenue en pression par au moins un ressort et une partie fixe composée d'une couronne de détrompage 8 munie d'autant de logements que de contacts à assurer dans lesquels aboutissent des contacts reliés aux circuits électriques à commander et qui reçoivent les organes roulants entraînés par la platine et circulant sur ladite couronne. Characterized in that it comprises a movable part secured to the axis of rotation composed of a locking plate 3 and a cage 5 in the housings of which are placed rolling members 4 on which the plate is held in pressure by at least one spring and a fixed part composed of a keying ring 8 provided with as many housings as there are contacts to be secured in which lead contacts connected to the electrical circuits to be controlled and which receive the rolling members driven by the plate and circulating on said crown. 2 - Commutateur selon la revendication 1, 2 - Switch according to claim 1, Caractérisé en ce qu'une pièce de contact est intercalée entre la cage et la couronne de détrompage et qu'elle comporte autant de languettes que de contacts à assurer chacune desdites languettes étant disposée au-dessus d'un logement de la couronne de détrompage. Characterized in that a contact piece is interposed between the cage and the polarization crown and that it comprises as many tongues as there are contacts to ensure each of said tongues being disposed above a housing of the polarization crown. 3 - Commutateur selon la revendication 2, 3 - Switch according to claim 2, Caractérisé en ce que les logements de la couronne de détrompage sont munis de chanfreins en forme de rampe. Characterized in that the housings of the polarization crown are provided with ramp-shaped chamfers. 4 - Commutateur selon la revendication 1, 4 - Switch according to claim 1, Caractérisé en ce qu'une rondelle de contact est fixée sous la platine d'entratnement au contact des organes roulants, réalisés en matériau conducteur. Characterized in that a contact washer is fixed under the drive plate in contact with the rolling members, made of conductive material. 5 - Commutateur selon la revendication 4, 5 - Switch according to claim 4, Caractérisé en ce que des plots épaulés sont chassés dans la couronne de détrompage. Characterized in that shouldered studs are driven into the keying ring. 6 - Commutateur selon la revendication 5, 6 - Switch according to claim 5, Caractérisé en ce qu'unie platine portant des circuits électriques imprimés est maintenu en pression entre les plots épaulés et une couche de mousse appliquée sur le fond du boîtier de commutation. Characterized in that a solid plate carrying printed electrical circuits is kept under pressure between the shouldered pads and a layer of foam applied to the bottom of the switch box. 7 - Commutateur selon la revendication 1, 7 - Switch according to claim 1, Caractérisé en ce que la couronne de détrompage comporte des chemins conducteurs déterminant les positions de contact des organes roulants réalisés en matériau conducteur.  Characterized in that the polarizing ring comprises conductive paths determining the contact positions of the rolling members made of conductive material.
FR8112302A 1981-06-23 1981-06-23 Multi-contact bi-directional rotating shaft switch - has assembly of three ball bearings which roll onto slots above printed circuit board contact points with pressure maintained by plate Pending FR2508229A1 (en)

Priority Applications (1)

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FR8112302A FR2508229A1 (en) 1981-06-23 1981-06-23 Multi-contact bi-directional rotating shaft switch - has assembly of three ball bearings which roll onto slots above printed circuit board contact points with pressure maintained by plate

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FR8112302A FR2508229A1 (en) 1981-06-23 1981-06-23 Multi-contact bi-directional rotating shaft switch - has assembly of three ball bearings which roll onto slots above printed circuit board contact points with pressure maintained by plate

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984004200A1 (en) * 1983-04-15 1984-10-25 Createc Elektronik Gmbh Electric switch
EP0599742A1 (en) * 1992-11-26 1994-06-01 Schneider Electric Sa Off-and-on mechanism for an electric medium-high or high voltage circuit breaker

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE665200C (en) * 1936-11-15 1938-09-20 Wilhelm Graf Multi-stage crank switch with pressure contacts
US2201882A (en) * 1939-02-15 1940-05-21 Gen Electric Electric switch
US2802911A (en) * 1956-05-14 1957-08-13 Arrow Hart & Hegeman Electric Rotary multi-position switch
GB893208A (en) * 1958-06-19 1962-04-04 Ferranti Ltd Improvements relating to mechanical digitisers
US3591740A (en) * 1969-01-27 1971-07-06 Meridian Industries Inc Selector switch assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE665200C (en) * 1936-11-15 1938-09-20 Wilhelm Graf Multi-stage crank switch with pressure contacts
US2201882A (en) * 1939-02-15 1940-05-21 Gen Electric Electric switch
US2802911A (en) * 1956-05-14 1957-08-13 Arrow Hart & Hegeman Electric Rotary multi-position switch
GB893208A (en) * 1958-06-19 1962-04-04 Ferranti Ltd Improvements relating to mechanical digitisers
US3591740A (en) * 1969-01-27 1971-07-06 Meridian Industries Inc Selector switch assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984004200A1 (en) * 1983-04-15 1984-10-25 Createc Elektronik Gmbh Electric switch
EP0599742A1 (en) * 1992-11-26 1994-06-01 Schneider Electric Sa Off-and-on mechanism for an electric medium-high or high voltage circuit breaker

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