EP0033051B1 - Programmer with a timing cam for an automatic washing machine - Google Patents

Programmer with a timing cam for an automatic washing machine Download PDF

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Publication number
EP0033051B1
EP0033051B1 EP80401889A EP80401889A EP0033051B1 EP 0033051 B1 EP0033051 B1 EP 0033051B1 EP 80401889 A EP80401889 A EP 80401889A EP 80401889 A EP80401889 A EP 80401889A EP 0033051 B1 EP0033051 B1 EP 0033051B1
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EP
European Patent Office
Prior art keywords
cam
timing
profile
programmer
blade
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Expired
Application number
EP80401889A
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German (de)
French (fr)
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EP0033051A1 (en
Inventor
Pierre Gasquet
Jean-Jacques Passetchnik
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Thales Avionics SAS
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Crouzet SA
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Publication of EP0033051A1 publication Critical patent/EP0033051A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
    • H01H43/02—Details
    • H01H43/04—Means for time setting

Definitions

  • the present invention relates to a programmer for an automatic washing machine, comprising a block of rotary program cams intended to cooperate with blade contacts to exercise, respectively, specific functions, means for driving the block of cams in rotation, and at least a timing cam associated with one of the blade contacts and the associated program cam of the cam block, the timing cam being arranged to be rotated and so that a low profile of said associated program cam cannot cooperate with said contact only after the timing cam has rotated by a determined angle.
  • Such a programmer is described in particular in FR-A-1 548 677 in the name of the applicant.
  • this programmer is the program cam of the cam block associated with the timing cam which is arranged to rotate the timing cam by the angle necessary for the timing to stop.
  • the timing cam is driven by its associated program cam of the cam block, that is to say, in the example mentioned above, the program cam controlling the spin functions, and therefore by the programmer, it suffices to manually drive the programmer for a few sufficient turns to rotate the timing cam, so that the machine door can be opened anyway.
  • the manual rotation of the programmer can be done in a very short time, it is obvious that the door can be opened before the drum is completely stopped.
  • the present invention therefore aims to offer, in particular, total door security, with which the time delay is only triggered at the end of the manual rotation of the programmer, for example.
  • the present invention converges a programmer of the type defined above, characterized in that the timing cam is mounted on the hub of the cam block, that it is arranged to be driven, against the action of elastic return means, by the drive means of the cam block, and that it has a high radius profile greater than a high profile of the said associated program cam, an intermediate radius delay profile lower than the high profile the associated program cam, and a low radius profile such that it allows the timing to stop and the blade of said associated contact to come into contact on the low profile of the associated program cam.
  • the arrangement of the programmer of the invention in which, in particular, the radius of the timing profile of the timing cam is less than the radius of the high profile of the associated program cam, as long as the programmer is rotated , the high profile of the program cam, at each rotation, is interposed between the timing profile of the timing cam and the blade of the associated contact, for, and under the action of the elastic return means of the cam delay, prevent the delay from continuing and the cooperation between the low profile of the program cam and the blade of the associated contact from being established.
  • the blade of said associated contact carries a spout arranged to cooperate with the timing profile and the stop, formed between this timing profile and the high profile, of the timing cam.
  • the timing cam has the shape of a crescent fixed, by its end opposite to that carrying the high profile, to the elastic return means.
  • the timing cam and the associated program cam are arranged to be driven in rotation, respectively, in opposite directions.
  • the programmer shown in the figure comprises, in a housing 6, a block of program cams, only one of which is shown, for example the spin program cam 5a.
  • This block is rotatably mounted on a hub 5, to be driven step by step, in the direction of the arrow F5, opposite to that of the needles of a watch in the figure, by a drive motor 20, synchronous, by through a speed reduction box, the output pinion of which actuates a pawl cooperating with a toothing formed on one of the cams of the cam block.
  • a drive motor 20 synchronous, by through a speed reduction box, the output pinion of which actuates a pawl cooperating with a toothing formed on one of the cams of the cam block.
  • each of the program cams is intended to cooperate with blade contacts to exercise specific functions.
  • the wiping program cam 5a is intended to cooperate with a blade 4 of a contact 7, 8, 9, to establish an electrical connection, either between the lugs 7 and 8, or between the lugs 7 and 9, according to that the cooperation takes place, either with a high or intermediate profile of the cam 5a, or with a low profile of this cam.
  • the blade 4 carries a contact, or cooperation, spout 4a.
  • the terminal 7 is connected to a power supply and the terminal 8 is connected to the motor 20 driving the programmer.
  • the terminal 9 it is connected to the coil 21 of an electromagnet, for example for locking the door of an automatic washing machine, on which the programmer is mounted.
  • the electromagnet 21 is not energized and locks the door of the machine. To open this door, the electromagnet must be energized, by connecting the lugs 7 and 9, on the one hand, and by pressing manually on a push button 22, on the other hand. When the button 22 is released, the machine door is opened and the electromagnet 21 is again de-energized.
  • the time delay cam will prevent such a danger.
  • the wiping cam 5a has a certain number of profiles, including a high profile 51 and a low profile 53. Let us assume that the blade 4 is mounted and that its elasticity is such that the reversal of the contact 7-9 occurs only 'to the cooperation of the spout 4a of the blade 4 and the low profile 53 of the cam 5a. It is therefore a question of obtaining that the inversion of the contact 7-9 only intervenes for a certain time after the low profile 53 has appeared under the spout 4a, it being understood that, as soon as the low profile 53 present under the spout 4a, the power to the drum drive motor is cut, but this motor not yet stopped, due to its inertia.
  • a timing cam 1 is therefore provided, attached to the program cam 5a, and on which the spout 4a of the blade 4 will bear at the same time as on the program cam 5a.
  • This timing cam has the shape of a crescent extending over more than 200 °, although this is not a limiting condition of the invention.
  • This cam 1 is mounted by elastic clamping on the hub 5 of the cam block, to be first free on this hub and then fixed, by an end 1a, opposite that 1b which is, at rest, under the spout 4a of blade 4, to a spring 3 tending to return cam 1 in the direction of arrow F5.
  • This spring fixed at one of its ends to the cam 1, is fixed, at its other end 3a and by a hole 6a, to the housing 6.
  • a hole is drilled at the end 1b of the cam 1 to fix it the end 3a of the spring 3 during the handling operations preceding the mounting of the cam 1.
  • the cam 1 is arranged to be driven, step by step, against the action of the spring 3, by the motor 20 driving the programmer, but in the direction of the arrow F1, it that is to say in the direction of clockwise, or in the opposite direction to that of the drive of the program cam block.
  • This arrangement is useful so that, during the rotation of the cam block, in the direction of arrow F5, the hub 5, by friction, tends to drive. the timing cam in the same direction as its return spring 3, and that it thus remains or quickly returns to abutment until the actual start of the timing.
  • the timing cam 1 has a high profile 11, at its end 1 b, with a radius greater than that of the high profile 51 of the program cam 5a, an intermediate timing profile 12, adjacent to and forming with the high profile 11 a stop shoulder 15, with a radius smaller than that of the high profile 51 of the cam 5a, and a low profile 14, adjacent to the profile 12, of radius substantially equal to that of the low profile 53 of the cam 5a, the profiles 11, 12 and 14 extending successively in the direction of arrow F5 at the periphery of the cam 1.
  • the radius of the low profile. 14 essentially depends on the stroke and the elasticity of the blade 4, just as moreover, the radius of the low profile 53 of the cam 5a.
  • the time delay profile 12 is a wolf tooth profile comprising n teeth 1c arranged to cooperate with the spout 4a of the blade 4, just like the shoulder 15.
  • the timing cam 1 has a profile. to: (n + 1) teeth 1d, arranged to cooperate with a single wheel tooth 2, driven in rotation in the direction of arrow F2, opposite to that of arrow F1, by the reduction gear mentioned above. At rest, the timing cam is in abutment against the spout 4a of the blade 4, by its shoulder 15.
  • the programmer works as follows. When, by manual action, the programmer has been driven so that its low profile 53 is under the spout 4a of the blade 4, the drum drive motor is stopped, but the drum continues to rotate and the contact between the lugs 7, remains established, that is to say that the motor 20 remains connected to continue the drive of the programmer.
  • the rotation of the cam block, under the action of the motor 20, being much slower than the rotation of the timing cam 1 under the action of this motor and of the wheel 2, we can admit, as a first approximation , that during the rotation of the cam 1, the cam 5a remains practically immobile.
  • the wheel 2 drives the cam 1 in the direction of the arrow F1, the cam 1 coming to bear on the spout 4a at the end of each step, by one of its teeth 1c.
  • the spout 4a plays the role of a non-return pawl, a return which would otherwise be caused by the spring 3.
  • the timing cam 1 has turned by the angle between the shoulder 15 and the low profile 14, perfectly determined angle, the spout 4a of the blade 4 can fall on the low profile 53 of the program cam 5a, and reverse the contact 7-9, to cut the connection 7-8 and establish the connection 7-9 between the supply and the coil 21 of the electromagnet. At this time, the drum is necessarily stopped and the door can be opened without risk.
  • the cam 1 is always stopped in its rotation in the direction of the arrow F5 by its shoulder 15 which abuts against the spout 4a of the blade 4.
  • the wheel 2 certainly starts to drive the cam 1 in the direction of the arrow F1, but at each revolution of the cam block, the high profile 51 of the cam 5a is interposed between the intermediate profile 12 of the cam 1 and the spout 4a to cause the return of the cam 1, that is to say the return of the shoulder 15 on the spout 4a, in other words again, causing a false start of the time delay and preventing the reversal of the contact 7 - 9.
  • the programmer of the invention may include a timing cam associated with any program cam, or even several timing cams associated, respectively, with several program cams.

Description

La présente invention concerne un programmateur pour machine à laver automatique, comprenant un bloc de cames programmes rotatives destinées à coopérer avec des contacts à lame pour exercer, respectivement, des fonctions déterminées, des moyens pour entraîner le bloc de cames en rotation, et au moins une came de temporisation associée à l'un des contacts à lame et à la came programme associée du bloc de cames, la came de temporisation étant agencée pour être entraînée en rotation et pour qu'un profil bas de ladite came programme associée ne puisse coopérer avec ledit contact qu'après que la came de temporisation ait tourné d'un angle déterminé.The present invention relates to a programmer for an automatic washing machine, comprising a block of rotary program cams intended to cooperate with blade contacts to exercise, respectively, specific functions, means for driving the block of cams in rotation, and at least a timing cam associated with one of the blade contacts and the associated program cam of the cam block, the timing cam being arranged to be rotated and so that a low profile of said associated program cam cannot cooperate with said contact only after the timing cam has rotated by a determined angle.

Un tel programmateur est notamment décrit dans le FR-A-1 548 677 au nom de la demanderesse. Dans ce programmateur, c'est la came programme du bloc de cames associée à la came de temporisation qui est agencée pour faire tourner la came de temporisation de l'angle nécessaire pour que cesse la temporisation.Such a programmer is described in particular in FR-A-1 548 677 in the name of the applicant. In this programmer, it is the program cam of the cam block associated with the timing cam which is arranged to rotate the timing cam by the angle necessary for the timing to stop.

Or si le problème à résoudre, qui est à l'origine de la présente invention, est bien de prévoir une temporisation déterminée, cette temporisation doit être effective en toutes circonstances et notamment dans le cas suivant. Avec une machine à laver le linge, il arrive parfois que la ménagère veuille raccourcir le cycle de lavage pour éviter vertaines opérations. Ainsi, si la machine est en cours d'essorage, on peut vouloir ne pas en attendre la fin et tourner le programmateur à la main pour le mettre sur la position fin d'essorage. Sur les machines classiques, donc avec un programmateur connu, cette manipulation provoque l'arrêt du moteur d'entraînement du tambour de la machine mais autorise également l'ouverture de la porte de la machine. Comme l'arrêt du moteur du tambour n'implique absolument pas l'arrêt du tambour lui-même, il est donc possible d'ouvrir la porte de la machine alors que le tambour, par son inertie, continue de tourner.However, if the problem to be resolved, which is at the origin of the present invention, is to provide a definite time delay, this time delay must be effective in all circumstances and in particular in the following case. With a washing machine, it sometimes happens that the housewife wants to shorten the washing cycle to avoid certain operations. So, if the machine is spinning, you may not want to wait for the end and turn the programmer by hand to put it in the end of spin position. On conventional machines, therefore with a known programmer, this manipulation stops the drive motor of the machine drum but also authorizes the opening of the machine door. As stopping the drum motor in no way implies stopping the drum itself, it is therefore possible to open the machine door while the drum, by its inertia, continues to rotate.

Dans le cas du programmateur du brevet cité ci-dessus, comme la came de temporisation est entraînée par sa came programme associée du bloc de cames, c'est-à-dire, dans l'exemple évoqué plus haut, la came programme commandant les fonctions d'essorage, et par conséquent par le grogrammateur, il suffit d'entraîner manuellement le programmateur sur les quelques tours suffisants pour faire pivoter la came de temporisation, pour qu'on puisse de toute façon ouvrir la porte de la machine. Comme la rotation manuelle du programmateur peut s'effectuer en un temps très court, il est évident que la porte peut être ouverte avant que le tambour ne soit complètement arrêté.In the case of the programmer of the patent cited above, as the timing cam is driven by its associated program cam of the cam block, that is to say, in the example mentioned above, the program cam controlling the spin functions, and therefore by the programmer, it suffices to manually drive the programmer for a few sufficient turns to rotate the timing cam, so that the machine door can be opened anyway. As the manual rotation of the programmer can be done in a very short time, it is obvious that the door can be opened before the drum is completely stopped.

La présente invention vise donc à offrir, notamment, une sécurité de porte totale, avec laquelle la temporisation n'est déclenchée qu'à la fin de la rotation manuelle du programmateur, par exemple.The present invention therefore aims to offer, in particular, total door security, with which the time delay is only triggered at the end of the manual rotation of the programmer, for example.

A cet effet, la présente invention converne un programmateur du type défini ci-dessus, caractérisé par le fait que la came de temporisation est montée sur le moyeu du bloc de cames, qu'elle est agencée pour être entraînée, contre l'action de moyens de rappel élastiques, par les moyens d'entraînement du bloc de cames, et qu'elle possède un profil haut de rayon supérieur à un profil haut de la dite came programme associée, un profil intermédiaire de temporisation de rayon inférieur au profil haut de la came programme associée, et un profil bas de rayon tel qu'il permette de faire cesser la temporisation et à la lame du dit contact associé de venir en contact sur le profil bas de la came programme associée.To this end, the present invention converges a programmer of the type defined above, characterized in that the timing cam is mounted on the hub of the cam block, that it is arranged to be driven, against the action of elastic return means, by the drive means of the cam block, and that it has a high radius profile greater than a high profile of the said associated program cam, an intermediate radius delay profile lower than the high profile the associated program cam, and a low radius profile such that it allows the timing to stop and the blade of said associated contact to come into contact on the low profile of the associated program cam.

Grâce à l'agencement du programmateur de l'ipvention, dans lequel, notamment, le rayon du profil de temporisation de la came de temporisation est inférieur au rayon du profil haut de la came programme associée, tant qu'on entraîne le programmateur en rotation, le profil haut de la came programme, à chaque rotation, vient s'interposer entre le profil de temporisation de la came de temporisation et la lame du contact associé, pour, et sous l'action des moyens de rappel élastiques de la came de temporisation, empêcher que la temporisation ne se poursuive et que la coopération entre le profil bas de la came programme et la lame du contact associé ne s'établisse.Thanks to the arrangement of the programmer of the invention, in which, in particular, the radius of the timing profile of the timing cam is less than the radius of the high profile of the associated program cam, as long as the programmer is rotated , the high profile of the program cam, at each rotation, is interposed between the timing profile of the timing cam and the blade of the associated contact, for, and under the action of the elastic return means of the cam delay, prevent the delay from continuing and the cooperation between the low profile of the program cam and the blade of the associated contact from being established.

Dans une forme de réalisation préférée du programmateur de l'invention, la lame dudit contact associé porte un bec agencé pour coopérer avec le profil de temporisation et la butée, ménagée entre ce profil de temporisation et le profil haut, de la came de temporisation.In a preferred embodiment of the programmer of the invention, the blade of said associated contact carries a spout arranged to cooperate with the timing profile and the stop, formed between this timing profile and the high profile, of the timing cam.

De façon avantageuse, la came de temporisation a la forme d'un croissant fixé, par son extrémité opposée à celle portant le profil haut, aux moyens de rappel élastiques. En outre, il est préférable que la came de temporisation et la came programme associée soient agencées pour être entraînées en rotation, respectivement, en sens inverses.Advantageously, the timing cam has the shape of a crescent fixed, by its end opposite to that carrying the high profile, to the elastic return means. In addition, it is preferable that the timing cam and the associated program cam are arranged to be driven in rotation, respectively, in opposite directions.

L'invention sera mieux comprise à l'aide de la description suivante d'une forme de réalisation préférée du programmateur de l'invention, en référence à la figure unique, qui représente une vue, en coupe partielle, d'une partie du programmateur de l'invention, avec une came de temporisation et sa came programme associée.The invention will be better understood using the following description of a preferred embodiment of the programmer of the invention, with reference to the single figure, which represents a view, in partial section, of a part of the programmer of the invention, with a timing cam and its associated program cam.

Le programmateur représenté sur la figure comporte, dans un boîtier 6, un bloc de cames programmes, dont une seule est représentée, par exemple la came programme d'essorage 5a. Ce bloc est monté rotatif sur un moyeu 5, pour être entraîné en pas à pas, dans les sens de la flèche F5, inverse de celui des aiguilles d'une montre sur la figure, par un moteur d'entraînement 20, synchrone, par l'intermédiaire d'une boîte de réduction de vitesse dont le pignon de sortie actionne un cliquet coopérant avec une denture ménagée sur l'une des cames du bloc de cames. Pareil entraînement est parfaitement connu et n'a pas été représenté pour cette raison.The programmer shown in the figure comprises, in a housing 6, a block of program cams, only one of which is shown, for example the spin program cam 5a. This block is rotatably mounted on a hub 5, to be driven step by step, in the direction of the arrow F5, opposite to that of the needles of a watch in the figure, by a drive motor 20, synchronous, by through a speed reduction box, the output pinion of which actuates a pawl cooperating with a toothing formed on one of the cams of the cam block. Such training is well known and has not been shown for this reason.

Chacune des cames programmes est destinée à coopérer avec des contacts à lame pour exercer des fonctions déterminées. Ainsi, la came programme d'essorage 5a est destinée à coopérer avec une lame 4 d'un contact 7, 8, 9, pour établir une liaison électrique, soit entre les cosses 7 et 8, soit entre les cosses 7 et 9, suivant que la coopération s'effectue, soit avec un profil haut ou intermédiaire de la came 5a, soit avec un profil bas de cette came. A cet effet, d'ailleurs, la lame 4 porte un bec de contact, ou de coopération, 4a. La cosse 7 est reliée à une alimentation et la cosse 8 est reliée au moteur 20 d'entraînement du programmateur. Quant à la cosse 9, elle est reliée à la bobine 21 d'un électro-aimant, par exemple de verrouillage de la porte d'une machine à laver le linge automatique, sur laquelle est monté le programmateur.Each of the program cams is intended to cooperate with blade contacts to exercise specific functions. Thus, the wiping program cam 5a is intended to cooperate with a blade 4 of a contact 7, 8, 9, to establish an electrical connection, either between the lugs 7 and 8, or between the lugs 7 and 9, according to that the cooperation takes place, either with a high or intermediate profile of the cam 5a, or with a low profile of this cam. For this purpose, moreover, the blade 4 carries a contact, or cooperation, spout 4a. The terminal 7 is connected to a power supply and the terminal 8 is connected to the motor 20 driving the programmer. As for the terminal 9, it is connected to the coil 21 of an electromagnet, for example for locking the door of an automatic washing machine, on which the programmer is mounted.

Pendant le fonctionnement de la machine, et plus précisément lorsque les cosses 7 et 8 sont reliées par la lame 4, l'électro-aimant 21 n'est pas sous tension et verrouille la porte de la machine. Pour ouvrir cette porte, il faut mettre l'électro-aimant sous tension, en reliant les cosses 7 et 9, d'une part, et en appuyant manuellement sur un bouton-poussoir 22, d'autre part. Lorsqu'on relâche le bouton 22, la porte de la machine est ouverte et l'électro-aimant 21 est à nouveau mis hors tension.During the operation of the machine, and more precisely when the terminals 7 and 8 are connected by the blade 4, the electromagnet 21 is not energized and locks the door of the machine. To open this door, the electromagnet must be energized, by connecting the lugs 7 and 9, on the one hand, and by pressing manually on a push button 22, on the other hand. When the button 22 is released, the machine door is opened and the electromagnet 21 is again de-energized.

Ainsi, pour pouvoir ouvrir la porte de la machine, il est nécessaire que la lame 4 ait basulé de la cosse 8 sur la cosse 9.Thus, in order to be able to open the door of the machine, it is necessary that the blade 4 has swung from the terminal 8 onto the terminal 9.

En l'absence de la came de temporisation, dont il va être question ci-après, le basculement de la lame 4 interviendrait lors de la présentation d'un profil bas de la came 5a sous le bec 4a de la lame 4. En même temps, et de manière conneu, un profil déterminé d'une autre came programme du bloc de cames viendrait coopérer avec la lame d'un autre contact associé pour arrêter le moteur d'entraînement du tambour de la machine, différent du moteur 20. En conséquence, il serait possible d'inverser, à la suite d'une action manuelle, le contact du moteur d'entraînement du tambour, ainsi que le contact de déverrouillage de la porte de la machine et, par conséquent, d'ouvrir cette porte avant que le tambour ne soit complètement arrêté. Cette action manuelle porrait consister à entraîner à la main la partie accessible du programmateur.In the absence of the timing cam, which will be discussed below, the tilting of the blade 4 would occur during the presentation of a low profile of the cam 5a under the spout 4a of the blade 4. At the same time time, and in a conneu, a determined profile of another cam program of the cam block would cooperate with the blade of another associated contact to stop the motor driving the drum of the machine, different from the motor 20. In Consequently, it would be possible to reverse, following a manual action, the contact of the drum drive motor, as well as the unlocking contact of the machine door and, consequently, to open this door. before the drum is completely stopped. This manual action could consist in manually training the accessible part of the programmer.

La came de temporisation va empêcher un tel danger.The time delay cam will prevent such a danger.

La came d'essorage 5a comporte un certain nombre de profils, dont un profil haut 51 et un profil bas 53. Admettons que la lame 4 soit montée et que son élasticité soit telle que l'inversion du contact 7-9 n'intervienne qu'à la coopération du bec 4a de la lame 4 et du profil bas 53 de la came 5a. Il s'agit donc d'obtenir que l'inversion du contact 7-9 n'intervienne qu'un certain temps après que le profil bas 53 se soit présenté sous le bec 4a, étant entendu que, dès que le profil bas 53 se présente sous le bec 4a, l'alimentation du moteur d'entraînement du tambour est coupée, mais ce moteur non encore arrêté, du fait de son inertie.The wiping cam 5a has a certain number of profiles, including a high profile 51 and a low profile 53. Let us assume that the blade 4 is mounted and that its elasticity is such that the reversal of the contact 7-9 occurs only 'to the cooperation of the spout 4a of the blade 4 and the low profile 53 of the cam 5a. It is therefore a question of obtaining that the inversion of the contact 7-9 only intervenes for a certain time after the low profile 53 has appeared under the spout 4a, it being understood that, as soon as the low profile 53 present under the spout 4a, the power to the drum drive motor is cut, but this motor not yet stopped, due to its inertia.

Il est donc prévu une came de temporisation 1, accolée contre la came programme 5a, et sur laquelle le bec 4a de la lame 4 va porter en même temps que sur la came programme 5a. Cette came de temporisation a la forme d'un croissant s'étendant sur plus de 200°, bien qu'il ne s'agisse pas d'une condition limitative de l'invention. Cette came 1 est montée par pincement élastique sur le moyeu 5 du bloc de cames, pour être d'abord libre sur ce moyeu et ensuite fixée, par une extrémité 1a, opposée à celle 1b qui se trouve, au repos, sous le bec 4a de la lame 4, à un ressort 3 tendant à rappeler la came 1 dans le sens de la flèche F5. Ce ressort, fixé à l'une de ses extrémités à la came 1, est fixé, à son autre extrémité 3a et par un trou 6a, au boîtier 6. Un trou est percé à l'extrémité 1b de la came 1 pour y fixer l'extrémité 3a du ressort 3 pendant les opérations de manutention précédant le montage de la came 1.A timing cam 1 is therefore provided, attached to the program cam 5a, and on which the spout 4a of the blade 4 will bear at the same time as on the program cam 5a. This timing cam has the shape of a crescent extending over more than 200 °, although this is not a limiting condition of the invention. This cam 1 is mounted by elastic clamping on the hub 5 of the cam block, to be first free on this hub and then fixed, by an end 1a, opposite that 1b which is, at rest, under the spout 4a of blade 4, to a spring 3 tending to return cam 1 in the direction of arrow F5. This spring, fixed at one of its ends to the cam 1, is fixed, at its other end 3a and by a hole 6a, to the housing 6. A hole is drilled at the end 1b of the cam 1 to fix it the end 3a of the spring 3 during the handling operations preceding the mounting of the cam 1.

Comme on le verra ci-après, la came 1 est agencée pour être entraînée, pas à pas, contre l'action du ressort 3, par le moteur 20 d'entraînement du programmateur, mais dans le sens de la flèche F1, c'est-à-dire dans le sens des aiguilles d'une montre, ou encore en sens inverse de celui de l'entraînement du bloc de cames programmes. Cette disposition est utile pour que, lors de la rotation du bloc de cames, dans le sens de la flèche F5, le moyeu 5, par frottement, tende à entraîner. la came de temporisation dans le même sens que son ressort de rappel 3, et qu'elle reste ainsi ou revienne rapidement en butée jusqu'au démarrage véritable de la temporisation.As will be seen below, the cam 1 is arranged to be driven, step by step, against the action of the spring 3, by the motor 20 driving the programmer, but in the direction of the arrow F1, it that is to say in the direction of clockwise, or in the opposite direction to that of the drive of the program cam block. This arrangement is useful so that, during the rotation of the cam block, in the direction of arrow F5, the hub 5, by friction, tends to drive. the timing cam in the same direction as its return spring 3, and that it thus remains or quickly returns to abutment until the actual start of the timing.

La came de temporisation 1 possède un profil haut 11, à son extrémité 1 b, de rayon supérieur à celui du profil haut 51 de la came programme 5a, un profil intermédiaire de temporisation 12, adjacent au profil haut 11 et ménageant avec celui-ci un épaulement de butée 15, de rayon inférieur à celui du profil haut 51 de la came 5a, et un profil bas 14, adjacent au profil 12, de rayon sensiblement égal à celui du profil bas 53 de la came 5a, les profils 11, 12 et 14 s'étendant successivement dans le sens de la flèche F5 à la périphérie de la came 1. Il faut noter que le rayon du profil bas.14 dépend essentiellement de la course et de l'élasticité de la lame 4, tout comme d'ailleurs le rayon du profil bas 53 de la came 5a.The timing cam 1 has a high profile 11, at its end 1 b, with a radius greater than that of the high profile 51 of the program cam 5a, an intermediate timing profile 12, adjacent to and forming with the high profile 11 a stop shoulder 15, with a radius smaller than that of the high profile 51 of the cam 5a, and a low profile 14, adjacent to the profile 12, of radius substantially equal to that of the low profile 53 of the cam 5a, the profiles 11, 12 and 14 extending successively in the direction of arrow F5 at the periphery of the cam 1. It should be noted that the radius of the low profile. 14 essentially depends on the stroke and the elasticity of the blade 4, just as moreover, the radius of the low profile 53 of the cam 5a.

Le profil de temporisation 12 est un profil en dents de loup comportant n dents 1c agencées pour coopérer avec le bec 4a de la lame 4, tout comme l'épaulement 15.The time delay profile 12 is a wolf tooth profile comprising n teeth 1c arranged to cooperate with the spout 4a of the blade 4, just like the shoulder 15.

Au-delà du profit bas 14, la came de temporisation 1 possède un profil. à :(n + 1 ) dents 1d, agencé pour coopérer avec une roue à une dent 2, entraînée en rotation dans le sens de la flèche F2, inverse de celui de la flèche F1, par le réducteur dont il a été question plus haut. Au repos, la came de temporisation est en butée contre le bec 4a de la lame 4, par son épaulement 15.Beyond the low profit 14, the timing cam 1 has a profile. to: (n + 1) teeth 1d, arranged to cooperate with a single wheel tooth 2, driven in rotation in the direction of arrow F2, opposite to that of arrow F1, by the reduction gear mentioned above. At rest, the timing cam is in abutment against the spout 4a of the blade 4, by its shoulder 15.

Le fonctionnement du programmateur est le suivant. Lorsque, par une action manuelle, on a entraîné le programmateur de manière que son profil bas 53 se trouve sous le bec 4a de la lame 4, le moteur d'entraînement du tambour est arrêté, mais le tambour continue de tourner et le contact entre les cosses 7, reste établi, c'est-à-dire que le moteur 20 reste branché pour poursuivre l'entraînement du programmateur. Toutefois, la rotation du bloc de cames, sous l'action du moteur 20, étant beaucoup plus lente que le rotation de la came de temporisation 1 sous l'action de ce moteur et de la roue 2, on peut admettre, en première approximation, que pendant la rotation de la came 1, la came 5a reste pratiquement immobile.The programmer works as follows. When, by manual action, the programmer has been driven so that its low profile 53 is under the spout 4a of the blade 4, the drum drive motor is stopped, but the drum continues to rotate and the contact between the lugs 7, remains established, that is to say that the motor 20 remains connected to continue the drive of the programmer. However, the rotation of the cam block, under the action of the motor 20, being much slower than the rotation of the timing cam 1 under the action of this motor and of the wheel 2, we can admit, as a first approximation , that during the rotation of the cam 1, the cam 5a remains practically immobile.

Alors, la roue 2 entraîne la came 1 dans le sens de la flèche F1, la came 1 venant en appui sur le bec 4a à la fin de chaque pas, par l'une de ses dents 1c. Le bec 4a joue le rôle d'un cliquet anti-retour, retour qui, sinon, serait provoqué par le ressort 3. Quand la came de temporisation 1 a tourné de l'angle compris entre l'épaulement 15 et le profil bas 14, angle parfaitement déterminé, le bec 4a de la lame 4 peut chuter sur le profil bas 53 de la came programme 5a, et inverser le contact 7-9, pour couper la liaison 7-8 et établir la liaison 7-9 entre l'alimentation et la bobine 21 de l'électro-aimant. A ce moment, le tambour est forcément arrêté et la porte peut être ouverte sans risque.Then, the wheel 2 drives the cam 1 in the direction of the arrow F1, the cam 1 coming to bear on the spout 4a at the end of each step, by one of its teeth 1c. The spout 4a plays the role of a non-return pawl, a return which would otherwise be caused by the spring 3. When the timing cam 1 has turned by the angle between the shoulder 15 and the low profile 14, perfectly determined angle, the spout 4a of the blade 4 can fall on the low profile 53 of the program cam 5a, and reverse the contact 7-9, to cut the connection 7-8 and establish the connection 7-9 between the supply and the coil 21 of the electromagnet. At this time, the drum is necessarily stopped and the door can be opened without risk.

On notera que, grâce au fait que le rayon du profil haut 11 de la came 1 soit supérieur au profil haut 51 de la came 5a, la came 1 est toujours arrêtée dans sa rotation dans le sens de la flèche F5 par son épaulement 15 qui vient en butée contre le bec 4a de la lame 4.It will be noted that, thanks to the fact that the radius of the high profile 11 of the cam 1 is greater than the high profile 51 of the cam 5a, the cam 1 is always stopped in its rotation in the direction of the arrow F5 by its shoulder 15 which abuts against the spout 4a of the blade 4.

Au début du cycle de lavage suivant, c'est un profil haut 51 de la came programme qui vient coopérer avec le bec 4a de la lame 4, ce qui a pour effet de libérer la came de temporisation du bec 4a qui, sous l'action du ressort 3, est entraînée en rotation en sens inverse, jusqu'à ce que son épaulement 15 revienne en butée contre le bec 4a, et ce, parce que le profil haut 51 de la came 5a a un rayon supérieur à celui du profil de temporisation 12 de la came 1, et que le profil haut 11 de la came 1 a, lui, un rayon supérieur à celui du profil haut 51 de la came 5a.At the start of the next washing cycle, it is a high profile 51 of the program cam which cooperates with the spout 4a of the blade 4, which has the effect of releasing the timing cam of the spout 4a which, under the action of the spring 3, is rotated in opposite directions, until its shoulder 15 abuts against the spout 4a, and this, because the high profile 51 of the cam 5a has a radius greater than that of the profile delay 12 of the cam 1, and that the high profile 11 of the cam 1 has a radius greater than that of the high profile 51 of the cam 5a.

Si, par mégarde, la ménagère tourne la partie accessible du programmateur de plusieurs tours, pendant cette rotation du programmateur, la roue 2 certes commence à entraîner la came 1 dans le sens de la flèche F1, mais à chaque tour du bloc de cames, le profil haut 51 de la came 5a vient s'interposer entre le profil intermédiaire 12 de la came 1 et le bec 4a pour provoquer le retour en arrière de la came 1, c'est-à-dire le retour de l'épaulement 15 sur le bec 4a, en d'autres termes encore, provoquer un faux démarrage de la temporisation et l'empêchement de l'inversion du contact 7 - 9.If, by mistake, the housewife turns the accessible part of the programmer by several turns, during this rotation of the programmer, the wheel 2 certainly starts to drive the cam 1 in the direction of the arrow F1, but at each revolution of the cam block, the high profile 51 of the cam 5a is interposed between the intermediate profile 12 of the cam 1 and the spout 4a to cause the return of the cam 1, that is to say the return of the shoulder 15 on the spout 4a, in other words again, causing a false start of the time delay and preventing the reversal of the contact 7 - 9.

Bien qu'ayant décrit l'invention en référence à une came de temporisation associée à une came particulière du bloc de cames programmes, en l'espèce la came d'essorage, le programmateur de l'invention peut comporter une came de temporisation associée à n'importe quelle came programme, ou même plusieurs cames de temporisation associées, respectivement, à plusieurs cames programmes.Although having described the invention with reference to a timing cam associated with a particular cam of the block of program cams, in this case the spinning cam, the programmer of the invention may include a timing cam associated with any program cam, or even several timing cams associated, respectively, with several program cams.

Claims (4)

1. Programmer for automatic washing machine, comprising a rotating programming cam unit adapted to cooperate with blade contacts (7, 8, 9) for respectively performing determined functions, means (20) for driving the cam unit in rotation, and at least one timing cam (1) associated with one of the blade contacts (7, 8, 9) and with the associated programming cam (5a) of the cam unit, the timing cam (1) being arranged to be driven in rotation and for a low profile (53) of said associated programming cam (5a) to be able to cooperate with said contact only after the timing cam (1) has rotated through a determined angle, characterized in that the timing cam (1) is mounted on the hub (5) of the cam unit, it is arranged to be driven, against the action of elastic brasing means (3), by the means (20) for driving the cam unit, and in that it has a high profile (11) of radius greater than a high profile (51) of said associated programming cam (5a), an intermediate timing profile (12) whose radius is less than the high profile (51) of the associated programming cam (5a) and a low profile (14) of such radius that it makes it possible to stop timing and enables the blade (4) of said associated contact to come into contact on the low profile (53) of the associated programming cam (5a).
2. Programmer according to claim 1, wherein the blade (4) of said associated contact bears a nose element (4a) adapted to cooperate with the timing profile (12) and the stop (15), arranged between this timing profile (12)' and the high profile (11) of the timing cam (1).
3. Programmer according to one of claims 1 and 2, wherein the timing cam (1) is in the form of a crescent at one (1 b) of the ends of which arranged the high profile (11), the other end (1a) of the crescent being fixed to said elastic brasing means (3).
4. Programmer according to one of claims 1 to 3, wherein the timing cam (1) and the associated programming cam (5a) are arranged to be driven in rotation in opposite directions, respectively.
EP80401889A 1980-01-28 1980-12-30 Programmer with a timing cam for an automatic washing machine Expired EP0033051B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8001819 1980-01-28
FR8001819A FR2474758A1 (en) 1980-01-28 1980-01-28 DELAYED CONTACT PROGRAMMER

Publications (2)

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EP0033051A1 EP0033051A1 (en) 1981-08-05
EP0033051B1 true EP0033051B1 (en) 1983-03-23

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ID=9237961

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Application Number Title Priority Date Filing Date
EP80401889A Expired EP0033051B1 (en) 1980-01-28 1980-12-30 Programmer with a timing cam for an automatic washing machine

Country Status (4)

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EP (1) EP0033051B1 (en)
DE (1) DE3062472D1 (en)
ES (1) ES499482A0 (en)
FR (1) FR2474758A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1548677A (en) * 1967-10-27 1968-12-06
FR2188275A1 (en) * 1972-06-09 1974-01-18 Crouzet Sa
FR2195807A2 (en) * 1972-08-07 1974-03-08 Mallory Timers Continent
FR2241108A1 (en) * 1973-08-13 1975-03-14 Copreci Ind Sci

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2446008A1 (en) * 1979-01-08 1980-08-01 Crouzet Sa Mechanical programming unit for washing machine - consists of two cam drums on same shaft driven by separate electric motors and connected by pin and slot

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1548677A (en) * 1967-10-27 1968-12-06
FR2188275A1 (en) * 1972-06-09 1974-01-18 Crouzet Sa
FR2195807A2 (en) * 1972-08-07 1974-03-08 Mallory Timers Continent
FR2241108A1 (en) * 1973-08-13 1975-03-14 Copreci Ind Sci

Also Published As

Publication number Publication date
ES8200792A1 (en) 1981-12-01
EP0033051A1 (en) 1981-08-05
DE3062472D1 (en) 1983-04-28
ES499482A0 (en) 1981-12-01
FR2474758A1 (en) 1981-07-31
FR2474758B1 (en) 1982-07-30

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