EP0780866B1 - Commutateur électrique rotatif pour tableau de commande, notamment de dispositif de chauffage,ventilation et/ou climatisation de véhicule automobile - Google Patents
Commutateur électrique rotatif pour tableau de commande, notamment de dispositif de chauffage,ventilation et/ou climatisation de véhicule automobile Download PDFInfo
- Publication number
- EP0780866B1 EP0780866B1 EP19960120347 EP96120347A EP0780866B1 EP 0780866 B1 EP0780866 B1 EP 0780866B1 EP 19960120347 EP19960120347 EP 19960120347 EP 96120347 A EP96120347 A EP 96120347A EP 0780866 B1 EP0780866 B1 EP 0780866B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotating body
- immobilisation
- disc
- flat
- switch according
- 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.)
- Expired - Lifetime
Links
Images
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
- H01H19/02—Details
- H01H19/10—Movable parts; Contacts mounted thereon
- H01H19/20—Driving mechanisms allowing angular displacement of the operating part to be effective in either direction
- H01H19/22—Driving mechanisms allowing angular displacement of the operating part to be effective in either direction incorporating lost motion
-
- 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
-
- 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
- H01H19/12—Contact arrangements for providing make-before-break operation, e.g. for on-load tap-changing
Definitions
- the invention relates to electrical switches, and including power switches for control of an electric motor of a motor-fan unit of a heating, ventilation and / or air conditioning system motor vehicle, as described in the preamble to the claim 1 (GB-A-837,433 for example).
- Such a switch is generally used to control an electrical device, such as an electric motor of a motor-fan unit.
- an electrical device such as an electric motor of a motor-fan unit.
- At each position of the body turning point corresponds to a given current intensity intended to power the motor to rotate the blades of the motor-ventilator group according to different speeds.
- an object of the invention is to provide a electrical switch, for control panel, which does not does not have the disadvantages of rotary switches the prior art.
- the invention provides for this purpose an electric switch rotary as defined in claim 1.
- Switches of the type described may further include, known manner, at least a plurality of primary tracks identical, integral with a plane support perpendicular to axis of rotation, electrically conductive and spaced regularly from each other, and at least one stud integral with the rotating body and intended to contact the primary tracks respectively when the rotating body is in one of the predefined positions. Otherwise, the space between two neighboring notches defines immobilization zones in correspondence with the predefined positions.
- the vertices of the notches are positioned in correspondence of the middle of the space separating the tracks neighboring primaries, which can increase the probability to have a short circuit when the immobilization means are stuck at the top of a notch.
- the primary tracks are positioned relative to the notched device so that each immobilization zone is placed in correspondence of an end zone of a primary track chosen from first and second end zones opposite to each other.
- the immobilization means include a housing integral with the element rotating and having an open front face, facing the notch device, a spring housed in the housing and supported by a rear end on a rear face of this one, and a ball housed at least partially in the housing, resting on a front end of the spring and diameter significantly less than the distance between the summits of neighboring notches to authorize its immobilization, under stress, between these, when the rotating body is in one of the predefined positions.
- the rotating body present in its intermediate part a circular cylindrical shape with flat, said flat being made at a first distance of the axis of rotation, and the opening of the disc is shaped adapted to that of the intermediate part of the rotating body with a flat located a second distance from the axis of rotation, greater than the first distance.
- the rotating body comprises upstream of its intermediate part a circular cylindrical portion comprising on its periphery, in selected positions, a plurality of housings intended to cooperate with an auxiliary means immobilization to strengthen the immobilization of the body turning when the immobilization means are in a immobilization area.
- This arrangement significantly reinforces the immobilization of the body rotating in the predefined positions.
- the auxiliary immobilization means is an elastic blade installed substantially perpendicularly to the rotating body and close to it, and having in the central part a domed shape appreciably homologous to that of the housing of the body turning.
- the electrical switch shown in Figure 1 does part of a control panel 1 which can, for example, used to control a heating and ventilation device and / or air conditioning of a motor vehicle (not shown on the face).
- This switch includes a rotating body 2 suitable for being rotated around an axis XX by a user wishing to obtain a particular adjustment of an element of the device.
- the element in question is the electric motor of the motor-fan unit blower. But it could be another electrically operated element.
- the rotating body 2 is integral, in its upper part a rotary button type control member 3 positioned with free rotation, for example by clipping, in a orifice in the wall 4 of the control panel 1. It is intended to take a plurality of predefined positions corresponding to markings of type "0", “1”, ..., "N", on the upper face 5 of the wall 4.
- the lower end 6 of the rotating body 2 is positioned with free rotation in an orifice formed in a plate support 7 secured to the wall 4 and produced in a electrically insulated material.
- the positioning is achieved, for example, by a snap 8 and by a small radial annular extension 9 of the rotating body 2 which strengthens the stabilization of the rotating body.
- the switch body is thus perfectly maintained by the guides formed by the orifices in wall 5 and the support plate 7, as well as by the extension of stabilization 9.
- the lower part of the body supports, above the support plate 7, two radial lugs 12 electrically connected to each other, preferably diametrically opposite, and at the ends of which are fixed by crimping, respectively, at least one stud 10 or 11, electrically conductive.
- the radial legs 12 are by example of flexible copper strips.
- the pads can be made by conformation local paws 12. But they can also be screwed or welded or even brazed. Likewise, stud supports (radial lugs 12) may take many other forms.
- These pads are intended to establish electrical connections between a feed track 13 and one of the tracks primary 14 of a plurality of primary tracks.
- These tracks 13 and 14 are carried by the upper face of the support plate 7. They are electrically conductive, substantially coplanar and positioned in an arc below pads 10 and 11 and their respective paths.
- the feed track 13 forms a strip of general shape circular of which one of the contours occupies more than half of the circumference of the annular zone. It is connected to a current or voltage generator (not shown in the figure).
- the primary tracks 14 are arranged on the part complementary to the annular area occupied by the runway primary. Each track is independent and electrically isolated from its two neighbors. They can be among two, three, four or more if necessary.
- the electric motor of the blower is connected to the different primary tracks 14 via resistors different values allowing, depending on the position of the body turning 2, to force said motor to rotate at a speed chosen by the user.
- the invention provides a disc 16 mounted for free rotation around the intermediate part 15 of the rotating body.
- This disc includes for this purpose an opening 17 allowing the passage of the intermediate part 15 of the rotating body, which preferably has a shape in this place cylindrical circular with flat 18 (see figure 2).
- This flat 18 is made at a first distance D1 from the axis of rotation XX.
- the opening 17 of the disc 16 is of a shape adapted to that of the intermediate part 15 of the body rotating with a flat 19 located at a second distance D2 from the axis of rotation XX. D2 being larger than D1, the opening 17 has a area greater than that occupied by the cross section of the intermediate part 15 of the rotating body 2. The excess area forms a lost or dead area 25 in which the rotating body can rotate freely, relatively disc, over a limited angular portion ⁇ (figure 2B).
- means of immobilization are provided carried by the disc 16 and adapted to cooperate with a circular notch device 20 carried by a support 21 fixed relative to the wall 4.
- the notch device comprises a plurality of notches or teeth 20 (or bulges) installed one next to the others on a portion of a circle some distance from the disc 16.
- the space between neighboring notches delimits an area immobilizer 26 intended to immobilize the means of fixed assets in correspondence with predefined positions of the rotating body.
- immobilization means are preferably carried out under the shape of a housing 22 housing a spring 23 and a ball 24.
- the housing 22 is fixed in a radial position on the periphery of the disc 16, for example in an opening thereof.
- Her rear face is substantially parallel to the flat 19 of the disc 16 and located in the same "half" of disc as said flat. It has an open front face, facing of the notch device to allow the passage of the ball 24.
- the ball is preferably secured to a front end of spring 23, which is preferably fixed to the face rear of the housing 22 by its rear end.
- the spring and the ball can be free one relative to the other and / or relative to the housing.
- the distance between the rear face of the housing 22 from the intersection area of neighboring notches is less than the empty distance of the spring added to the diameter of the ball, so that the ball is applied under stress against the notches 20. Furthermore, the diameter of the ball 24 and the space between vertices S of neighboring notches are chosen so that the ball is firmly immobilized between these notches in the immobilization areas 26. Consequently, the distance between vertices S of notches is greater than the diameter ball 24.
- the body is provided turning 2, upstream of the intermediate part 15, a radial extension in the form of a circular plate 27 and comprising on its periphery, in selected positions, a plurality of housings 28 intended to cooperate with means immobilizer 29 fixed relative to the wall 4.
- the auxiliary immobilization means is an elastic blade 29 installed in a perpendicular plane to the rotating body and close to it.
- This blade 29 has, in a central part, a bulge 30 of form appreciably homologous to that of the dwellings 28.
- the respective positions of the blade 29 and the housings 28 are chosen so that in each predefined position of the rotating body 2 corresponding to an immobilization zone 26 is associated with a housing 28 which cooperates with the bulging 30 of blade 29.
- the accommodation can be directly made in the rotating body if it has a circular cylindrical portion.
- Each predefined position of the rotating body is associated with a positioning of the pads 10 and 11, and only one.
- the ball 24 is immobilized in the zone 26-0 and the two studs are on the supply track 13.
- the ball 24 is immobilized in zone 26-i
- pad 11 is on the supply track
- the pad 10 is on the primary track 14-i.
- the tracks are preferably placed so than at a position of the ball in the center of an immobilization zone 26 corresponds to the positioning of the pad 10 on a end zone 31 of a primary track. This zone end may be on one side of a track or on the side opposite. So when the ball 24 is at the top S a notch 20, the pad 10 cannot be between two tracks neighboring primaries, which could cause short circuits.
- FIGS. 2A to 2D in which are represented, firstly, in the upper part, the positioning of the pad 10 relative to the tracks 13 and 14-1, secondly, in the central part, a section transverse along the axis IIa-IIa of Figure 1, the intermediate part 15 of the rotating body 2, and a third part, in the lower part, a cross section along the axis IIb-IIb of Figure 1, of the circular plate 27.
- FIG. 2A illustrates the switch in its position of "rest". Ball 24 is immobilized in the immobilization zone 26-0 and pad 10 is on the feed track 13. In this position, the lost area 25 is substantially rectangular. The bulge 30 of the blade 29 is housed in the housing 28-0 of the plate 27.
- the respective shapes of the disc opening and the intermediate part of the rotating body may be completely different from those described, provided they define a limited lost race.
Description
- la figure 1 est un schéma illustrant un commutateur selon un mode de réalisation préférentiel de l'invention, dans une vue en coupe transversale;
- les figures 2A à 2D sont des schémas illustrant les positions relatives respectives de certains éléments principaux du commutateur de la figure 1, dans quatre positions différentes du corps tournant.
Claims (7)
- Commutateur électrique rotatif pour tableau de commande, notamment de dispositif de chauffage, ventilation et/ou climatisation de véhicule automobile, du type comprenant un corps tournant (2) propre à être entraíné en rotation autour d'un axe (XX) sous l'action d'un organe de commande (3), ainsi que des moyens d'immobilisation (22-24) portés par le corps tournant (2) et propres à coopérer avec un dispositif à crans (20), de configuration circulaire et porté par un support fixe (21), pour immobiliser le corps tournant en des positions prédéfinies, lesdits moyens d'immobilisation font partie d'un élément intermédiaire (16) solidaire en rotation du corps tournant (2) avec un débattement angulaire limité définissant une course perdue, ce qui permet de découpler le corps tournant des moyens d'immobilisation en évitant ainsi un blocage éventuel des moyens d'immobilisation dans une position instable au sommet (S) d'un cran (20), du fait d'un frottement généré sur le corps tournant caractérisé en ce que l'élément intermédiaire (16) est un disque présentant une ouverture centrale (17) de forme choisie propre à autoriser le passage d'une partie intermédiaire (15) du corps tournant (2) tout en permettant le débattement angulaire limité.
- Commutateur selon la revendication 1, dans lequel on prévoit au moins une pluralité de pistes primaires (14) identiques, solidaires d'un support plan (7) perpendiculaire à l'axe de rotation (XX), électriquement conductrices et espacées régulièrement les unes des autres, et au moins un plot (10) solidaire du corps tournant et destiné à contacter les pistes primaires respectivement lorsque le corps tournant est dans l'une des positions prédéfinies, et dans lequel l'espace entre deux crans (20) voisins définit des zones d'immobilisation (26) en correspondance des positions prédéfinies, et dans lequel les pistes primaires sont positionnées par rapport au dispositif à crans de telle sorte que chaque zone d'immobilisation se trouve placée au dessus d'une zone d'extrémité (31) d'une piste primaire choisie parmi une première et une seconde zones d'extrémité opposées l'une à l'autre.
- Commutateur selon l'une des revendications 1 et 2, caractérisé en ce que les moyens d'immobilisation comprennent un boítier (22) solidaire de l'élément intermédiaire (16) et comportant une face avant ouverte, en regard du dispositif à crans (20), un ressort (23) logé dans le boítier et s'appuyant par une extrémité arrière sur une face arrière de celui-ci, et une bille (24) logée au moins partiellement dans le boítier, s'appuyant sur une extrémité avant du ressort et de diamètre sensiblement inférieur à la distance séparant les sommets (S) de crans voisins pour autoriser son immobilisation, sous contrainte, entre ceux ci, lorsque le corps tournant est dans l'une des positions prédéfinies.
- Commutateur selon la revendication 3, caractérisé en ce que le corps tournant (2) présente dans sa partie intermédiaire (15) une forme cylindrique circulaire à méplat (18), ledit méplat étant réalisé à une première distance (D1) de l'axe de rotation (XX), et en ce que l'ouverture (17) du disque (16) est de forme adaptée à celle de la partie intermédiaire (15) du corps tournant avec un méplat (19) situé à une seconde distance (D2) de l'axe de rotation (XX) plus grande que la première distance (D1).
- Commutateur selon l'une des revendications 3 et 4, caractérisé en ce que le boítier (22) est fixé sur la périphérie du disque (16) en position radiale, sa face arrière étant sensiblement parallèle au méplat (19) du disque (16) et située dans la même moitié de disque que ledit méplat.
- Commutateur selon l'une des revendications précédentes, caractérisé en ce que le corps tournant (2) comprend en amont de sa partie intermédiaire (15) une portion cylindrique circulaire (27) comportant sur sa périphérie, en des positions choisies, une pluralité de logements (28) destinés à coopérer avec un moyen auxiliaire d'immobilisation (29) pour renforcer l'immobilisation du corps tournant lorsque les moyens d'immobilisation sont dans une zone d'immobilisation (26).
- Commutateur selon la revendication 6, caractérisé en ce que le moyen auxiliaire d'immobilisation (29) est une lame élastique installée sensiblement perpendiculairement au corps tournant et à proximité de celui-ci, et présentant dans une partie centrale un bombement (30) de forme sensiblement homologue à celle des logements (28) du corps tournant.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9515428 | 1995-12-22 | ||
FR9515428A FR2742914B1 (fr) | 1995-12-22 | 1995-12-22 | Commutateur electrique rotatif pour tableau de commande, notamment de dispositif de chauffage, ventilation et/ou climatisation de vehicule automobile |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0780866A1 EP0780866A1 (fr) | 1997-06-25 |
EP0780866B1 true EP0780866B1 (fr) | 2003-02-26 |
Family
ID=9485909
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19960120347 Expired - Lifetime EP0780866B1 (fr) | 1995-12-22 | 1996-12-18 | Commutateur électrique rotatif pour tableau de commande, notamment de dispositif de chauffage,ventilation et/ou climatisation de véhicule automobile |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0780866B1 (fr) |
DE (1) | DE69626369T2 (fr) |
FR (1) | FR2742914B1 (fr) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE443206C (de) * | 1924-03-18 | 1927-04-22 | Albert Prein | Drehschalter |
GB837433A (en) * | 1956-07-04 | 1960-06-15 | Mason Electric Corp | Improvements in or relating to snap-action electric switch construction |
DE1167419B (de) * | 1962-05-18 | 1964-04-09 | Fritz Hellige & Co G M B H Fab | Rastwerk, insbesondere fuer elektrische Dreh- und Schiebeschalter |
DE4141110A1 (de) * | 1991-12-13 | 1993-06-17 | Haschkamp Geb Dreefs | Drehwahlschalter mit einer durch eine rastung festlegbaren schaltnockenwelle oder schaltnockenscheibe |
-
1995
- 1995-12-22 FR FR9515428A patent/FR2742914B1/fr not_active Expired - Lifetime
-
1996
- 1996-12-18 DE DE1996626369 patent/DE69626369T2/de not_active Expired - Lifetime
- 1996-12-18 EP EP19960120347 patent/EP0780866B1/fr not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
FR2742914A1 (fr) | 1997-06-27 |
DE69626369T2 (de) | 2003-12-11 |
FR2742914B1 (fr) | 1998-02-13 |
EP0780866A1 (fr) | 1997-06-25 |
DE69626369D1 (de) | 2003-04-03 |
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