EP2732456B1 - Commutateur de sélection comprenant une fonction automatique de mise à l'arrêt - Google Patents

Commutateur de sélection comprenant une fonction automatique de mise à l'arrêt Download PDF

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Publication number
EP2732456B1
EP2732456B1 EP11767468.9A EP11767468A EP2732456B1 EP 2732456 B1 EP2732456 B1 EP 2732456B1 EP 11767468 A EP11767468 A EP 11767468A EP 2732456 B1 EP2732456 B1 EP 2732456B1
Authority
EP
European Patent Office
Prior art keywords
selector
teeth
fastening
actuator
power actuator
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.)
Not-in-force
Application number
EP11767468.9A
Other languages
German (de)
English (en)
Other versions
EP2732456A1 (fr
Inventor
Stefano ROCCHITELLI
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.)
Elettrotecnica Rold SRL
Original Assignee
Elettrotecnica Rold SRL
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 Elettrotecnica Rold SRL filed Critical Elettrotecnica Rold SRL
Publication of EP2732456A1 publication Critical patent/EP2732456A1/fr
Application granted granted Critical
Publication of EP2732456B1 publication Critical patent/EP2732456B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
    • H01H1/26—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting with spring blade support
    • 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
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/28—Power arrangements internal to the switch for operating the driving mechanism using electromagnet
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/42—Driving mechanisms, i.e. for transmitting driving force to the contacts using cam or eccentric
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/50—Driving mechanisms, i.e. for transmitting driving force to the contacts with indexing or locating means, e.g. indexing by ball and spring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/52—Driving mechanisms, i.e. for transmitting driving force to the contacts with means to ensure stopping at intermediate operative positions

Definitions

  • the present invention relates to a device for selecting the operating programmes of an appliance, in particular of an electrical household appliance, which incorporates the auto switch-off function. Selecting devices of this type are commonly called simply selectors, and accordingly the present invention relates to a selector provided with auto switch-off function, i.e. for switching off the appliance automatically, which entails total disconnection of the electric power supplied from the mains.
  • selectors connected to electronic control cards that incorporate both the power switch ON/OFF function and the function of selecting the operating programme of the electrical household appliance, settable by the user, are currently known on the market and are commonly used in the electrical household appliances sector, such as mainly washing machines but also dishwashers, tumble-dryers and similar electrical household appliances.
  • the two functions are controlled and performed by two different, separate circuits: one circuit dimensioned for switching power loads up to 16 amperes at the nominal mains voltage (220-230 V), the other for managing a digital output with Gray code, i.e. a fixed-length binary code well known by a person skilled in the art of electronic or electromechanical devices, at low operating currents and voltages.
  • Gray code i.e. a fixed-length binary code well known by a person skilled in the art of electronic or electromechanical devices, at low operating currents and voltages.
  • both circuits are controlled by means of a cam that turns as a result of actuation, in particular of rotation, by the user, of a control knob located on the control panel of the electrical household appliance.
  • the first step of rotation of the knob causes closure of two power contacts and we thus have switching from the OFF position to the ON position of the electrical household appliance, which is thus live, while successive positions of the knob, which are reached by successive rotations of said knob, alter the digital output, and therefore the operating programmes of the electrical household appliance, according to a code predefined by the design and connected with the morphology of the control cam inside the selector.
  • the power circuit is always closed, and therefore the electrical household appliance is always in the ON condition.
  • the selector remains in its coding position selected at the beginning of the operations until further rotation of the knob to the initial OFF position is effected manually, by the user.
  • Document DE102004026099 discloses a device according to the preamble of claim 1.
  • the main problem to be solved by the present invention is therefore to provide a selector that overcomes these and other drawbacks of devices of the type known from the prior art.
  • the present invention aims to provide a selector which, while maintaining the functions of manual setting of the operating programme and of manual switching on and off, also includes an auto switch-off function, specially controlled by the control electronics of the machine.
  • the present invention aims to provide a selector that is compatible "pin to pin", where pin means the connecting contact between the selector and the card, with the existing electronic control cards in use on the majority of electrical household appliances, and that is mechanically compatible with the control knobs currently in production.
  • the selector according to the present invention can be connected to the electrical household appliance without requiring any modification of the design of the seating of the conventional selector.
  • Another aim of the present invention is to provide a selector that makes it possible to use at least some of the components currently used in devices without an auto switch-off function of the type known from the prior art, with obvious advantages in terms of mechanical and electrical reliability, as well as safety.
  • a selector for switching-on, switching-off and selection of the operating programmes of an appliance comprising means for automatic opening of the power supply circuit at the end of the selected operating programme.
  • said selector comprises a box-shaped enclosing casing 10 which houses some components assigned to connection of said selector to the electronic card of the electrical household appliance, such as for example the contact pins 11 and further connecting elements 12.
  • Said enclosing casing 10 houses a function selector 20, which in the example shown in the figures consists of a Gray-code selector comprising a substantially cylindrical axial body 21 connected integrally to a disk 22 that develops in a plane substantially horizontal and perpendicular to said cylindrical axial body 21 whose axis A defines the rotation axis of said disk 22.
  • a function selector 20 which in the example shown in the figures consists of a Gray-code selector comprising a substantially cylindrical axial body 21 connected integrally to a disk 22 that develops in a plane substantially horizontal and perpendicular to said cylindrical axial body 21 whose axis A defines the rotation axis of said disk 22.
  • the cylindrical body 21 of function selector 20 is in a substantially vertical position, and is connected to the knob of the electrical household appliance that can be moved manually by the user.
  • the rotation of the knob of the electrical household appliance by the user thus causes a rotation of the function selector 20.
  • the disk 22 has a top surface and a bottom surface, where the bottom surface is the one that is turned towards the bottom of the enclosing casing 10, and therefore towards the electronic card when the device is assembled on the electrical household appliance, while the top surface is the opposite surface, facing upwards according to the orientation shown in the figures.
  • axis A of rotation of the function selector 20 is a vertical axis
  • vertical direction means the direction of axis A that can be seen in Fig. 1
  • horizontal direction will be identified as the direction orthogonal thereto.
  • top and bottom do not require further definition as they will be referred to this system of orientation.
  • said disk 22 of function selector 20 comprises, corresponding to the outer edge of the upper face, a series of teeth 22a that thus produce an alternation of peaks and valleys, and corresponding to the inner edge, as can be seen in Fig. 2 , a further tooth 23 that will correspond to the zero position of the selector, as will be clearer from the following illustration of the operation of the device.
  • the selector according to the present invention then comprises means for automatic opening of the power supply circuit of the electrical household appliance to which the selector is connected.
  • Said means comprise in particular a series of components 30, 40, 60, 70 able to interact with one another, with said function selector 20, and with the contacts 13, 14 of the circuits of the electrical household appliance, so that the user can act manually on the knob of the electrical household appliance causing said elements to close the power circuit supplying the electrical household appliance by selecting the desired operating programme, and in such a way that opening of the power circuit supplying the electrical household appliance at the end of the operating programme can take place both manually under the action of the user by rotating the knob of the electrical household appliance, and automatically under the action of the electronic control unit of the electrical household appliance and via said means.
  • a mechanical reset 30 is connected to said function selector 20, and can only move vertically relative to the latter.
  • the vertical movement of said mechanical reset 30 is determined by the presence of a tooth 33 able to oppose tooth 23 of said function selector 20.
  • a tooth 33 able to oppose tooth 23 of said function selector 20.
  • the mechanical reset 30 moves upwards.
  • the force required for bringing the two opposed teeth 23 and 33 in the position in Fig. 2 is supplied by the user, acting on the knob and rotating it.
  • Said mechanical reset 30 comprises in its turn a substantially cylindrical, hollow bottom portion for enclosing said cylindrical axial body 21 of said function selector.
  • Said mechanical reset 30 has in addition a pair of stems 32 that extend upwards in a substantially vertical direction.
  • said vertical stems 32 are two in number and are positioned in a position diametrically opposite to one another.
  • Said components further comprise a power actuator 40.
  • the power actuator 40 consists of an element that also has a hollow cylindrical central portion 41, to which a disk-shaped base element 42 is connected, from which two bridge pieces 43 extend vertically and in a position diametrically opposite to one another.
  • the power actuator 40 is thus configured so that it can be inserted in said mechanical reset 30 in such a way that said stems 32 are inserted into said vertical bridge pieces 43.
  • the coupling thus created between the power actuator 40 and the mechanical reset 30 only permits relative movements of translation of the two elements in the vertical direction relative to one another.
  • a first cover 50 is closed on said enclosing casing 10 holding the elements described so far.
  • Said first cover 50 has holes that permit passage of said vertical bridge pieces 43 of said power actuator 40, inside which, as already mentioned, said vertical stems 32 of said mechanical reset 30 are housed.
  • the selector according to the present invention further comprises an actuator 60 that is able to operate a fastening-releasing device 70.
  • Said actuator and said releasing device are advantageously positioned above said first cover 50 so that a pair of fastening teeth 71 forming part of said releasing device interacts with said bridge pieces 43 that project upwards from said first cover 50.
  • said actuator 60 is constituted, in the example shown here as a non-limiting example, of an electromechanical actuator, in particular of a solenoid 60 comprising an actuating arm 61 which is able to effect a horizontal movement of a release lever 72, forming part of said fastening-releasing device 70, as a result of an electric pulse.
  • the solenoid comprises a protective conductor with thermal autoregulation indicated by the acronym PTC (Positive Temperature Coefficient) and known on the market, mounted in series with the winding of the solenoid.
  • PTC Pressure Temperature Coefficient
  • This ceramic element can cut off the current flowing through the winding in case of failure, to the electric control system.
  • the wire of the solenoid could overheat and even melt, producing smoke (although still meeting the standard requirements for product safety) and causing permanent breakage of the device.
  • This solenoid is controlled directly by the electronic control unit of the electrical household appliance, and therefore the electric pulse can be sent to the solenoid under the control of said electronic control unit.
  • the release lever 72 can be seen in particular in Fig. 4 .
  • Said release lever 72 moves the pair of fastening teeth 71 that can be inserted in said vertical bridge pieces 43 of said power actuator, preventing the latter from moving downwards.
  • a compression spring 73 holds the fastening teeth 71 in an operating position in which they lock the vertical bridge pieces 43 in a raised position, while actuation of the solenoid, with consequent movement of release lever 72, displaces said fastening teeth 71 to a non-operating position in which they do not interact with said vertical bridge pieces 43.
  • the power actuator 40 and the mechanical reset 30 can move vertically relative to the body 10 of the selector, while the function selector 20 turns when operated by the user as it is integral with the control knob of the electrical household appliance.
  • the function selector 20 turns, and its rotation causes upward movement of the power actuator 40 by the effect of opposition of teeth 22a of said function selector 20 with teeth 42a of said power actuator 40.
  • the power actuator 40 moves upwards, thereby also raising the mechanical reset 30 that is integral with said power actuator 40.
  • rotation of the function selector 20 corresponds to an upward movement of the mechanical reset 30 only and exclusively when the operator moves the knob manually to the OFF position, corresponding precisely to alignment of the two opposed teeth 23 and 33.
  • the upward movement of the power actuator 40 which occurs corresponding to the rotation of the knob corresponding to selection of an operating programme of the electrical household appliance, causes the power contacts 13 to close, thus supplying the electrical household appliance with mains voltage, as can be seen in Figs. 5A and 5B .
  • the bridge pieces 43 of said actuator 40 will be caught on the fastening teeth 71 of the fastening-releasing device 70, which keeps them in the raised position throughout the operation of the electrical household appliance until the end of the programme.
  • the user can rotate the knob and alter the programme setting of the electrical household appliance with the power actuator 40 remaining in the raised position shown in Figs. 5A and 5B that corresponds to an ON operating condition of the electrical household appliance in which the power supply circuit is closed.
  • the downward movement of the power actuator 40 causes opening of the contacts 13 and therefore opening of the supply circuit of the electrical household appliance, which therefore switches automatically to the OFF condition without the operator having to intervene manually by operating the knob.
  • the selector according to the present invention makes it possible to incorporate in a single device both the manual OFF function conventionally performed by the selectors currently used on electrical household appliances, and an innovative auto switch-OFF function that currently is not performed by the known selectors, so that the electrical household appliances remain under power in a stand-by condition, involving energy consumption even at the end of the operating programme of said electrical household appliance.
  • the selector according to the present invention makes it possible to combine in a single, extremely compact device, and which can be used together with an electronic card of the type already in use on electrical household appliances, without requiring any modification, and being compatible pin-to-pin with the selectors already known only now also providing an auto switch-off function, not performed by the existing selectors.

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  • Push-Button Switches (AREA)

Claims (13)

  1. Sélecteur (100) du type adapté pour la connexion au bouton de commande d'un appareil pour la gestion de mise en marche, de mise à l'arrêt et de sélection des programmes de fonctionnement dudit appareil en ouvrant et fermant au moins un circuit (13) pour l'alimentation électrique à la tension secteur et au moins un circuit de travail à basse tension (14) au moyen de contacts à l'intérieur dudit sélecteur, caractérisé en ce qu'il comprend des moyens (20, 30, 40, 60, 70) pour l'ouverture automatique du circuit d'alimentation (13) dudit appareil à la fin du programme de fonctionnement sélectionné.
  2. Sélecteur (100) selon la revendication précédente, caractérisé en ce que lesdits moyens pour l'ouverture automatique du circuit d'alimentation (13) comprennent un sélecteur de fonction (20) adapté pour la connexion audit bouton de commande d'un appareil et rotatif autour d'un axe vertical (A), un élément de remise à zéro mécanique (30) connecté audit sélecteur de fonction (20) et mobile verticalement par rapport à celui-ci, un actionneur de puissance (40) adapté pour fermer et ouvrir les circuits d'alimentation électrique (13) et les circuits de travail à basse tension (14) en se déplaçant verticalement par rapport audit sélecteur de fonction (20) entre une première position relevée correspondant à la condition (ON) avec le circuit d'alimentation (13) fermé et une deuxième position abaissée correspondant à la condition de non fonctionnement (OFF) avec le circuit d'alimentation (13) ouvert.
  3. Sélecteur (100) selon la revendication précédente, caractérisé en ce que ledit sélecteur de fonction (20) consiste en un sélecteur à code de Gray comprenant un disque (22) qui s'étend dans un plan sensiblement horizontal rotatif autour dudit axe vertical (A) et comprenant, en correspondance du bord extérieur de sa face supérieure, une série de dents (22a) qui produisent ainsi une alternance de sommets et de creux.
  4. Sélecteur (100) selon la revendication précédente, caractérisé en ce que ledit actionneur de puissance (40) comporte une portion centrale cylindrique creuse (41) à laquelle est connecté un élément de base en forme de disque (42), à partir duquel deux pièces en pont (43) s'étendent verticalement et sont positionnées diamétralement opposées l'une à l'autre, et sur la surface inférieure dudit élément de base en forme de disque (42) est disposée une série de dents (42a) qui peuvent interagir avec lesdites dents (22a) disposées sur ledit disque (22) dudit sélecteur de fonction (20), de manière que, quand les pointes de dents (22a) du sélecteur de fonction (20) sont positionnées de manière qu'elles correspondent aux pointes de dents (42a) dudit actionneur de puissance (40), ledit actionneur de puissance est dans la position relevée (ON) et, quand les pointes d'une série de dents rencontrent les creux de l'autre série de dents, ledit actionneur de puissance est dans la position abaissée (OFF).
  5. Sélecteur (100) selon la revendication précédente, caractérisé en ce que lesdits moyens pour l'ouverture automatique du circuit d'alimentation (13) comprennent en outre un dispositif de fixation-libération (70) qui comprend au moins une paire de dents de fixation (71) qui peuvent interagir avec lesdites pièces en pont (43) dudit actionneur de puissance (40) de manière à maintenir ledit actionneur de puissance (40) dans ladite première position relevée correspondant à la position (ON) avec le circuit d'alimentation (13) fermé.
  6. Sélecteur (100) selon la revendication précédente, caractérisé en ce que lesdits moyens pour l'ouverture automatique du circuit d'alimentation (13) dudit appareil à la fin du programme de fonctionnement sélectionné comprennent en outre un actionneur (60) pouvant être connecté directement à l'unité de commande électronique pour faire fonctionner ledit appareil et capable d'actionner ledit dispositif de fixation-libération (70) de manière que, suite à une impulsion électrique transmise par l'unité de commande, ledit actionneur (60) déplace ledit dispositif de fixation-libération (70) en libérant automatiquement lesdites dents de fixation (71) desdites pièces en pont (43), de manière à provoquer l'abaissement automatique dudit actionneur de puissance (40) vers la position abaissée (OFF) en provoquant l'ouverture du circuit d'alimentation (13).
  7. Sélecteur (100) selon l'une quelconque des revendications 3 à 6, caractérisé en ce que ledit disque (22) dudit sélecteur de fonction (20) comprend en outre une autre dent (23) s'étendant vers le haut et capable de s'opposer à une dent correspondante (33) disposée au-dessous dudit élément de remise à zéro mécanique (30), de manière que, quand ladite dent (23) dudit sélecteur de fonction (20) est amenée, suite à la rotation du sélecteur de fonction (20) par l'utilisateur, dans une position OFF manuelle dans laquelle ladite dent (23) est positionnée en correspondance de ladite dent (33) associée audit élément de remise à zéro mécanique (30), ledit élément de remise à zéro mécanique (30) se déplace vers le haut.
  8. Sélecteur (100) selon la revendication précédente, caractérisé en ce que ledit élément de remise à zéro mécanique (30) comprend en outre une paire de tiges (32) qui s'étendent vers le haut dans une direction sensiblement verticale et sont positionnées dans une position diamétralement opposée l'une à l'autre et peuvent être insérées dans lesdites pièces en pont verticales (43) dudit actionneur de puissance (40).
  9. Sélecteur (100) selon la revendication 6, caractérisé en ce que ledit actionneur (60) consiste en un solénoïde comprenant un bras d'actionnement (61) connecté audit dispositif de fixation-libération (70).
  10. Sélecteur (100) selon l'une quelconque des revendications 5 à 9, caractérisé en ce que ledit dispositif de fixation-libération (70) comprend au moins un levier de libération (72) connecté audit bras d'actionnement (61) dudit solénoïde (60) et connecté auxdites dents de fixation (71).
  11. Sélecteur (100) selon l'une quelconque des revendications 5 à 10, caractérisé en ce que lesdites dents de fixation (71) ont une zone avec une extrémité biseautée en bas de manière que la poussée exercée sur lesdites dents de fixation (71) par lesdites tiges (32) quand ledit élément de remise à zéro mécanique (30) se déplace vers le haut sous l'action de la rotation manuelle dudit sélecteur de fonction (20) dans une position OFF manuelle, il pousse lesdites dents de fixation (71) hors desdites pièces en pont (43) en provoquant la libération dudit actionneur de puissance (40).
  12. Sélecteur (100) selon l'une quelconque des revendications 9 à 11, caractérisé en ce qu'il comprend en outre un CTP de protection monté en série avec l'enroulement dudit solénoïde.
  13. Appareil électroménager comprenant un sélecteur selon l'une quelconque des revendications 1 à 12.
EP11767468.9A 2011-07-11 2011-07-11 Commutateur de sélection comprenant une fonction automatique de mise à l'arrêt Not-in-force EP2732456B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2011/053079 WO2013008060A1 (fr) 2011-07-11 2011-07-11 Commutateur de sélection comprenant une fonction automatique de mise à l'arrêt

Publications (2)

Publication Number Publication Date
EP2732456A1 EP2732456A1 (fr) 2014-05-21
EP2732456B1 true EP2732456B1 (fr) 2015-07-01

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Application Number Title Priority Date Filing Date
EP11767468.9A Not-in-force EP2732456B1 (fr) 2011-07-11 2011-07-11 Commutateur de sélection comprenant une fonction automatique de mise à l'arrêt

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EP (1) EP2732456B1 (fr)
WO (1) WO2013008060A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2826886C3 (de) * 1978-06-19 1981-04-09 Ebe Elektro-Bau-Elemente Gmbh, 7022 Leinfelden-Echterdingen Mehrfach-Stufendrehschalter
DE102004026099A1 (de) * 2003-05-30 2004-12-16 Marquardt Gmbh Elektrischer Schalter
BRPI0900042A2 (pt) * 2009-01-13 2010-10-19 Everel Do Brasil S A aperfeiçoamento aplicado em chave seletora rotativa

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EP2732456A1 (fr) 2014-05-21

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