EP0780866B1 - Elektrischer Drehschalter für Steuertafel insbesondere für Vorrichtungen zur Heizung, Lüftung und/oder Klimatisierung eines Fahrzeuges - Google Patents

Elektrischer Drehschalter für Steuertafel insbesondere für Vorrichtungen zur Heizung, Lüftung und/oder Klimatisierung eines Fahrzeuges Download PDF

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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
Application number
EP19960120347
Other languages
English (en)
French (fr)
Other versions
EP0780866A1 (de
Inventor
Thierry Petit
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.)
Valeo Climatisation SA
Original Assignee
Valeo Climatisation 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 Valeo Climatisation SA filed Critical Valeo Climatisation SA
Publication of EP0780866A1 publication Critical patent/EP0780866A1/de
Application granted granted Critical
Publication of EP0780866B1 publication Critical patent/EP0780866B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01H19/02—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.

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (7)

  1. Elektrischer Drehschalter für ein Steuerpaneel, insbesondere einer Kraftfahrzeug Heiz-, Belüftungs-und/oder-Klimaanlage, vom Typ, umfassend einen drehbaren Körper (2), der rotationsmäßig angetrieben werden kann bezüglich einer Achse (XX) unter der Einwirkung eines Steuerelementes (3), sowie Immobilisationsmittel (22-24), gestützt von dem drehbaren Körper (2) und geeignet zur Wechselwirkung mit einer gezahnten Einrichtung (20) mit kreisförmiger Konfiguration und gestützt durch eine feststehende Stütze (21) zum Zwecke der Fixierung oder Immobilisierung des drehbaren Körpers in vorbestimmten Positionen, wobei die Immobilisationsmittel Bestandteile sind eines zwischengelagerten Elementes (16), welches drehfest mit dem drehbaren Körper (2) vorgesehen ist, mit winkelmäßigem, begrenztem Ausschlag einen Freilauf definierend, wodurch es ermöglicht ist, den drehbaren Körper von den Immobilisationsmitteln zu entkoppeln, indem somit eine eventuelle Blockierung der Immobilisationsmittel in einer instabilen Position am Scheitel (S) eines Zahnes (20) vermieden wird, bedingt durch eine an dem drehbaren Körper bewirkte Reibung, dadurch gekennzeichnet, dass das zwischengelagerte Element (16) eine Scheibe ist, die eine zentrale oder mittlere Öffnung (17) aufweist, mit einer Form, gewählt zum Zwecke der Ermöglichung des Durchtrittes eines zwischengelagerten Teiles oder Abschnittes (15) des drehbaren Körpers (2), wobei der begrenzte winkelmäßige Ausschlag ermöglicht ist.
  2. Schalter nach Anspruch 1, bei welchem man zumindest eine Vielzahl an identischen Primärspuren (14) vorsieht, verbunden mit einer ebenen Stütze (7), senkrecht zur Rotationsachse (XX), elektrisch leitfähig bzw. leitend und gleichmäßig beabstandet mit Bezug zueinander, wobei zumindest eine mit dem drehbaren Körper verbundene Kontaktstelle (10) bestimmt ist, die jeweiligen Primärspuren zu verbinden, wenn der drehbare Körper in einer seiner vorbestimmten Positionen vorliegt, wobei der Raum zwischen zwei benachbarten Zähnen (20) Immobilisationszonen (26) definiert, in Entsprechung zu vorbestimmten Positionen, wobei die Primärspuren mit Bezug auf die Zahn- oder Zahnkranzeinrichtung derart positioniert oder angeordnet sind, dass jede Immobilisationszone sich oberhalb einer Endzone (31) einer Primärspur befindet, ausgewählt unter einer ersten und einer zweiten einander gegenüberstehenden Endzonen.
  3. Schalter nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, dass die Immobilisationsmittel ein Gehäuse (22), verbunden mit dem zwischengelagerten Element (16) und umfassend eine offene Vorder- oder Frontfläche, gegenüberstehend der Zahn- oder Zahnkranzeinrichtung (20), eine Feder (23), die in dem Gehäuse aufgenommen ist und mit einem hinteren Ende an einer Heck- oder hinteren Fläche davon anliegt, und eine Kugel (24) umfasst, die zumindest teilweise in dem Gehäuse aufgenommen ist, in Anlage an einem vorderen Ende der Feder, wobei der Durchmesser davon im wesentlichen kleiner ist als die Beabstandung, die die Scheitel (S) von benachbarten Zähnen trennt, um die Immobilisation unter Vorspannung zwischen diesen zu ermöglichen, wenn der drehbare Körper in einer der vorbestimmten Positionen vorliegt.
  4. Schalter nach Anspruch 3, dadurch gekennzeichnet, dass der drehbare Körper (2) an seinem zwischengelagerten Teil oder Abschnitt (15) eine kreis-zylindrische Form mit Abflachung (18) aufweist, wobei die Abflachung dargestellt ist bei einem ersten Abstand (D1) der Rotationsachse (XX), und dass die Öffnung (17) der Scheibe (16) von entsprechender oder angepasster Form ist bezüglich jener des zwischengelagerten Teiles oder Abschnittes (15) des drehbaren Körpers, mit einer Abflachung (19), befindlich bei einer zweiten Entfernung (D2) der Rotationsachse (XX), die größer ist, als die erste Beabstandung oder Entfernung (D1).
  5. Schalter nach einem der Ansprüche 3 und 4, dadurch gekennzeichnet, dass das Gehäuse (22) an der Peripherie der Scheibe (16) in radialer Position fixiert oder feststehend ist, wobei die hintere Fläche davon im wesentlichen parallel verläuft zur Abflachung (19) der Scheibe (16) und sich auf ein und derselben Hälfte der Scheibe befindet wie die Abflachung.
  6. Schalter oder Umschalter nach einem der vorangegangen Ansprüche, dadurch gekennzeichnet, dass der drehbare Körper (2) flußaufwärtsliegend seines zwischengelagerten Teiles oder Abschnittes (15) einen kreis-zylindrischen Abschnitt (27) umfasst, der an seiner Peripherie bei gewählten Positionen eine Vielzahl an Aufnahmen (28) aufweist, vorgesehen zur Wechselwirkung mit einer Hilfsimmobilisationseinrichtung (29) zum Zwecke der Verstärkung der Immobilisation des drehbaren Körpers, wenn die Immobilisationsmittel in einer Immobilisationszone (26) vorliegen.
  7. Schalter nach Anspruch 6, dadurch gekennzeichnet, dass die Hilfsimmmobilisationseinrichtung (29) eine elastische Klinge ist, installiert im wesentlichen senkrecht bezüglich des drehbaren Körpers und in einer Nachbarschaft davon, wobei sie in einem mittleren Abschnitt eine Wölbung (30) aufweist, in der Form im wesentlichen entsprechend jener der Aufnahmen (28) des drehbaren Körpers.
EP19960120347 1995-12-22 1996-12-18 Elektrischer Drehschalter für Steuertafel insbesondere für Vorrichtungen zur Heizung, Lüftung und/oder Klimatisierung eines Fahrzeuges Expired - Lifetime EP0780866B1 (de)

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 (de) 1997-06-25
EP0780866B1 true EP0780866B1 (de) 2003-02-26

Family

ID=9485909

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960120347 Expired - Lifetime EP0780866B1 (de) 1995-12-22 1996-12-18 Elektrischer Drehschalter für Steuertafel insbesondere für Vorrichtungen zur Heizung, Lüftung und/oder Klimatisierung eines Fahrzeuges

Country Status (3)

Country Link
EP (1) EP0780866B1 (de)
DE (1) DE69626369T2 (de)
FR (1) FR2742914B1 (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
DE69626369T2 (de) 2003-12-11
FR2742914A1 (fr) 1997-06-27
EP0780866A1 (de) 1997-06-25
FR2742914B1 (fr) 1998-02-13
DE69626369D1 (de) 2003-04-03

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