EP1626031A1 - Dosing device - Google Patents

Abstract

The dosing device has a dosing tip (1) provided with a valve (5) for opening or closing a bottle accommodating the drink. A movable activator provided on the dosing tip, comprises a motor for opening the valve. An independent claim is also included for removable activator.

Description

Dosing device comprising a dosing tip with a first valve that can be opened or closed, this tip being able to be fixed on a container, in particular a bottle, and a removable activator that can be placed on the dosing tip in order to open the valve, the inside and the outside of the container being in communication when the first valve is open. The invention also relates to a dosing tip and an activator.

For the dosing of liquids, two systems are known in particular. The first comprises a metering chamber which is in contact on the one hand with the interior of the container when a first valve is open and which is in contact with the outside of the container when a second valve is open. To guarantee the volume removed, the two valves can not be opened simultaneously. For filling the dosing chamber, the first valve is open, while the second is closed. At the latest during the sampling, the first valve is closed and the second is opened to allow the liquid contained in the metering chamber to flow. This system makes it possible to deliver doses whose volume is defined by the volume of the metering chamber. The valves are opened by an activator secured to the dosing device. As a first-group device, those described for example in documents FR 2 699 911 A1, WO 94/09346 A1 and AU 545 688 B2 will be mentioned.

The second system consists of a dosing tip comprising a conduit connecting the inside and the outside of the container and in which is placed a valve that can be opened or closed. At the time of sampling, the valve is open for a certain time during which the liquid flows directly from the bottle into the glass. The present invention relates to this type of dosing system.

Examples of this second type of metering device are those mentioned in DE 93 03 504 U1, DE 200 07 149 U1, US 6,662,976 A and US 6,036,055 A on the one hand and US 5,379,916 A on the other hand. In the first four documents, the valve is opened by an electromagnet placed in an external activator, in some cases removable, in the fifth the valve is opened by a mechanical device integral with the dosing tip and which partially bathes in the liquid s' flowing.

The device of US 6,036,055 A for example consists of a proportion of a dosing tip which is fixed on the neck of the bottle and an activator collar which is placed around the dosing tip. The dosing tip is provided with a valve which in the rest position is urged by a spring against the opening through which the liquid flows. No liquid can be taken, even when the bottle is spilled. The valve is partly made of magnetic steel. The activator collar is provided with a coil wound around the orifice into which penetrate the dosing tip and therefore the valve. To cause the valve to open, the bartender passes a current through the coil for a given time, which causes the valve to move and release the opening of the dosing tip. An electronic device transmits to a base the information concerning the sampling: name of the bartender, name of the liquid, quantity taken, etc. This device ensures a regular dosage of beverages and assign different dosages to different servers and a management of stocks and consumption of drinks. The disadvantage of this device lies in the fact that it uses an electromagnet. The activator collar is therefore heavy, bulky and requires a significant amount of energy.

The dispenser of DE 200 07 149 U1 comprises a dosing tip attached to the bottle and a fixed support which receives the bottle with its dosing tip and under which is placed the glass to be filled. This installation therefore has a certain size and the payment of liquid can be done only where the fixed support is placed.

From US 6,662,976 A there is known a metering device with a valve which is actuated when placed in an electric field.

All the devices provided with a valve that can be opened by an electromagnet have the disadvantage of a considerable energy consumption for the actuation of the solenoid valve, because it is necessary to actuate the valve against the force of a spring by means of an electromagnet. In addition, the size of these devices is often important and the devices are relatively heavy thus making a bar service difficult. Finally, the viscous drinks or tending to make deposits lead rather quickly to malfunctions of the spring systems. The device of US Pat. No. 5,379,916 A has the disadvantage that its motor partly bathes in the flowing liquid, which is undesirable for reasons of both mechanical and hygienic operation.

The object of the present invention is therefore to provide a dosing device of the type of that presented in the preamble which has a low power consumption and therefore has a significant autonomy. In addition, the device of the invention must be reliable, compact and lightweight. In addition, the liquid should not come into contact with the opening and closing mechanism. The activator must also be able to be used for several containers.

This object is achieved according to the invention because the activator is provided with a motor for opening the valve. A small motor placed in the activator, including an electric motor powered by a battery or accumulator and actuating the valve directly has a much lower power consumption than that of an electromagnetic system that has significant losses.

The air inlet can be through a small hole on the side of the dosing tip. This is sufficient especially when the container is stored mainly the top head, that is to say the dispensing tip upwards. If, on the other hand, the container is stored upside down, leakage may occur through the air inlet. It is therefore preferable to provide the dosing tip with closure means. In a preferred embodiment of the invention, the metering tip is provided with a second valve that can be opened by the engine. This second valve will be used to let air in during sampling. The first and second valves will preferably open and close simultaneously.

In the context of the invention, provision is made to provide the activator with means to cause the closing of the first valve and / or the second valve after a defined period of time. Knowing the flow per unit time, it is possible to perform the dosage depending on the opening time of the first and possibly the second valve.

An improvement of the invention consists in providing a tilt sensor to activate the motor. The opening of the bottle being useful only when it is sufficiently inclined, the tilt sensor makes it possible to start the dosing by activating the motor.

In a preferred embodiment of the invention, the first valve and / or the second valve are integral with a first valve magnet and / or a second magnet. respectively, and the activator is provided with a first motor magnet and / or a second motor magnet which can be moved by the motor to cooperate with the first valve magnet and / or the second valve magnet. respectively to open and / or close the first valve and / or the second valve respectively.

To ensure a return of the valves in the closed position, it is preferable to provide a first spring and / or a second spring which tend to push in the closed position the first valve and / or the second valve respectively when the engine does not open them. .

In a preferred embodiment of the invention, the first motor magnet and / or the second motor magnet are arranged in the activator so as to be moved each between a rest position where they do not cause the opening of the first valve and / or the second valve respectively, and an open position where they cooperate with the first valve magnet and / or the second valve magnet respectively by causing the opening of the first valve and / or the second valve respectively, the first and the second motor magnet being preferably integral.

In order to determine the quantity of liquid to be poured, it is possible to equip the dosing tip with means for identifying the container and / or the beverage contained in the container, these identification means being able to emit information concerning the container and / or the drink. This information may concern, for example, the type of beverage, the initial volume of the bottle and the volume of a dose as well as the quantity taken, which makes it possible to indicate the volume of beverage left in the bottle.

In an alternative embodiment of the invention, there are provided means for identifying the server, these means being able to transmit information concerning the server. These means can be a mechanical or electronic key and they allow to know which server served what quantity of each drink. The countdown at the end of service is thus facilitated.

To facilitate inventory management and billing, it is possible to provide the activator with a control unit that can receive information from a base station, and / or receive or read information from the server identification means. , and / or receive or read the information of the identification means of the container and / or drink, and adjust the opening time of the first valve and / or the second valve according to the information from the base station and / or means of identification of the server and / or means of identification of the container and / or drink, and / or be provided with means for transmitting information concerning the server, the beverage, the container and / or the opening time of the first valve and / or the second valve at the base station. Reading the means of identification of the container and / or the drink makes it possible on the one hand to serve the planned doses of each drink and on the other hand to make cocktails from recorded recipes, the device allowing the appropriate dosage of every ingredient in the recipe. In addition, the reading of the means of identification of the server can among other things be used for the personal counting of the servers, a control of the personnel and the management of the stocks. With a control unit able to communicate with the base, it is also possible to block the activator of some servers, either generally or in a targeted way for certain drinks. It is also possible to put the dosing device in "happy hour" mode or to authorize the payment of the liquid only after the order has been pointed in a cash register.

The motor is preferably an electric motor powered by batteries or a rechargeable battery placed in the activator. Small electric motors can be powered by these means while having a good autonomy. They are light and compact. In particular, they require less space than electromagnets and their weight and consumption are lower. For double-valve dosing devices intended to be placed in a support head down, it is also possible to supply the motor to the mains.

Finally, it is expected that the transmission of information between the dosing tip and the control unit and between the control unit and the base station is a wireless transmission. This measure, which also avoids wiring, makes working with the dosing device much easier.

The invention also relates to a dosing tip for a dosing device according to the invention, the dosing tip being provided with a first valve which can be opened by the activator of the dosing device thus allowing when the valve is open to let a liquid flow through the dosing tip. In the tip according to the invention, the first valve is provided with means for cooperating with a motor placed in the activator. When the tip is used on a container intended to be stored upside down, it is preferable to provide the tip of a second valve provided with means for cooperating with the motor of the activator of the metering device in order to open it. . These means for cooperating with a motor of the first valve and / or of the second valve are preferably constituted by a first valve magnet and / or a second valve magnet respectively intended to cooperate with a first motor magnet and / or a second motor magnet respectively actuated by the motor, and a first spring and / or a second spring respectively tending to keep closed the first valve and / or the second valve respectively when the first motor magnet and / or the second motor magnet respectively are in the rest position.

The invention also relates to a removable activator for a dosing device according to the invention. The activator is equipped with a motor which is preferably provided with one or two magnets displaceable by the motor, preferably solidarily, in order to open a first valve and / or a second valve respectively of a dosing tip according to the invention.

Figure 1

une vue éclatée d'une pointe de dosage simple ;

Figure 2

une vue de face en coupe longitudinale de la pointe de dosage de la figure 1 avec la valve en position fermée ;

Figure 3

une vue de face en coupe longitudinale selon la ligne AA de la figure 9 de la pointe de dosage de la figure 1 avec la valve en position ouverte ;

Figure 4 :

une vue de dessous selon la ligne BB de la figure 6 d'un activeur enfilé sur une pointe de dosage en position fermée ;

Figure 5 :

une vue de dessus selon la section BB de la figure 8 d'un activeur enfilé sur une pointe de dosage en position ouverte ;

Figure 6 :

une vue de face en coupe longitudinale d'un dispositif selon l'invention en position fermée ;

Figure 7 :

une vue de côté en coupe selon la ligne CC de la figure 6 du dispositif de la figure 6 ;

Figure 8 :

une vue de face selon la ligne AA de la figure 9 d'un dispositif selon l'invention en position ouverte ;

Figure 9 :

une vue de côté selon la ligne CC de la figure 8 du dispositif de la figure 8 ;

Figure 10 :

une vue éclatée d'une valve double ;

Figure 11 :

une vue de face en coupe de la pointe de dosage de la figure 10 en position fermée ; et

Figure 12 :

une vue de face en coupe de la pointe de dosage de la figure 10 en position ouverte.

Exemplary embodiments of the invention are described below with the aid of the drawings which show:

Figure 1

an exploded view of a single dosing tip;

Figure 2

a front view in longitudinal section of the metering tip of Figure 1 with the valve in the closed position;

Figure 3

a front view in longitudinal section along the line AA of Figure 9 of the metering tip of Figure 1 with the valve in the open position;

Figure 4:

a bottom view along the line BB of Figure 6 of an activator threaded on a dosing tip in the closed position;

Figure 5:

a view from above according to section BB of Figure 8 of an activator threaded on a dosing tip in the open position;

Figure 6:

a longitudinal sectional front view of a device according to the invention in the closed position;

Figure 7:

a side view in section along the line CC of Figure 6 of the device of Figure 6;

Figure 8:

a front view along the line AA of Figure 9 of a device according to the invention in the open position;

Figure 9:

a side view along the line CC of Figure 8 of the device of Figure 8;

Figure 10:

an exploded view of a double valve;

Figure 11:

a front view in section of the metering tip of Figure 10 in the closed position; and

Figure 12:

a front view in section of the metering tip of Figure 10 in the open position.

The dosing device consists essentially of a dosing tip (1, 1 ') and an activator (20). In a first embodiment of the invention, the dosing tip (1) is provided with a single valve (5), whereas in a second embodiment of the invention it is provided with two valves (5, 15). This second embodiment (1 ') deriving directly from the first (1), it will be presented after the single valve system (1, 20).

The single dosing tip (1), as shown in Figures 1 to 9, is intended to be threaded into the neck of a bottle by the tip (2). In order to avoid any fraud, the dosing tip is sealed on the bottle, for example using a retractable capsule. The tip (2) hollow is open on the side of the bottle and opens on a first cavity (3) provided with an orifice (4) closed by a valve (5) equipped with a plug (12). The orifice (4) contacts the first cavity (3) with a second cavity (10) opening into a spout (6) through which the liquid flows when the valve (5) is open. When the valve (5) is open, there is communication between the inside and the outside of the bottle and liquid can flow freely through the dosing tip.

A first permanent magnet (8) is placed on the valve (5), for example at its top. A first spring (7) tends to place the first valve (5) in the closed position, the plug (12) obstructing the orifice (4). In the rest position, the dosing tip is closed. This avoids the risk of evaporation. Even when the bottle is inverted, the valve remains in the closed position if no activator is in place.

An orifice (11) at the base of the spout (6), opening into the mouthpiece (2), allows air to enter the container when liquid flows through the spout (6).

The dosing tip (1) is further provided with identification means (9) of the bottle and / or the liquid contained therein. It is possible using these means to detect which bottle or liquid it is and therefore to know the volume to pay. These identification means of the bottle and / or the liquid may consist of a barcode or an RTIF transponder which transmits the desired information.

The simple activator (20) consists essentially of a housing (21) in which are placed an electric motor (22), a rack device (23) and a power source (24), such as batteries , to power the electric motor. In use, the activator (20) is threaded onto the spout (6) of the dosing tip (1). A first permanent motor magnet (25) is placed in the housing. It is secured to the rack device (23). It can move between two extreme positions: a rest position, shown in Figures 4, 6 and 7, where it has no effect on the first valve magnet (8) or at least an effect too small for countering the spring force (7), and an opening position, shown in Figures 5, 8 and 9, in which it is substantially aligned with the first valve magnet (8). In this position, it pushes the first valve magnet (8) and thus the valve (5). The orifice (4) is then open and the liquid can flow into the spout (6). The first motor magnet (25) during its displacement describes a circular arc of approximately 40 ° around the spout (6).

It should be noted, for the understanding of Figures 4 and 5 which show the rotational movement of the first motor magnet (25) between the rest position (Figure 4) and the open position (Figure 5), that the FIG. 4 shows a section view from below along the line BB of FIG. 6, while FIG. 5 shows a section view from above along the line BB of FIG. 8. This explains why the rack system of FIG. below and above.

The activator (20) is also provided with a not shown control unit which can identify the beverage contained in the bottle by cooperating with the identification means (9) of the bottle and / or the liquid it contains. It may be for example a barcode reader or an RTIF receiver which will receive the RTIF transponder signal (9) placed in the dosing tip (1). The control unit will determine the opening time of the first valve (6) according to the information provided by the identification means (9) of the bottle and optionally the cocktail to be produced. The activator may also be provided with two contacts to select a dosage. There are then three doses available: a "normal" dose that will be activated automatically or a larger dose or a smaller dose depending on the choice of the contact button.

The triggering of the opening of the first valve (5), that is to say the activation of the electric motor, can be caused in various ways. The user can press a switch that sends a signal to the control unit, which then triggers the opening of the first valve (5) by moving the first motor magnet (25) until it is aligned with the first valve magnet (8). It is also possible to place a tilt sensor in the activator (20). As soon as a threshold value is reached, the sensor sends a signal to the control unit.

Means for identifying the user (26) of the activator (20) may also be provided. For example, an activator (20) may be provided per user, for example by barman. The user will put his activator on the dosing tip of each bottle he wants to take a dose. Another solution is to equip each bottle with an activator (20) and that each user identifies for example with a key or a card at the time of sampling.

Thanks to wireless transmission means, the control unit of the activator (20) can send to a central database all the data necessary for good inventory management. It will thus be possible to send the identifier of the user, the identifier of the bottle and / or liquid and the duration of sampling. The central database then collects all these data so that it is possible to know at any time the state of the stocks and the sales status of each bartender. In addition, this data can be used for billing purposes. It is also possible to equip the activator not with a simple transmitter, but with a transceiver with which it can communicate with the base station.

In the example presented here, the valve is controlled by means of a magnet set (8, 25) and a spring (7). The plug (12) of the valve (5) is placed on the face of the orifice (4) located on the side of the first orifice (3), so be on the tip end (2) and the bottle. The valve (6), to open the orifice (4), must be pushed towards the tip (2). The first motor magnet (25) is placed on the side of the valve located towards the spout (6). The magnets (8, 21) must therefore be aligned with two identical poles (ie North / North or South / South) to cause the valve (5) to move. However, it would be quite possible to place the valve cap in the second cavity (10) with a spring (7) provided for either pulling or pushing the valve (5), in both cases towards the endpiece (2). It would then be necessary for the second magnet (25) to attract the valve towards the spout (6). Therefore, the magnets (8, 21) should be oriented with two opposite poles (ie North / South or South / North).

Similarly, it is also possible to position the first motor magnet not on the side of the valve located towards the spout (6) but on the side of the end piece (2) and the bottle. The orientation of the magnets is then reversed compared to previously envisaged cases.

Instead of causing the valve (5) to open by moving a first motor magnet (25) relative to a first magnet (8) integral with the valve (5), the motor could act directly on the valve (5). ) for example by means of a rod extending the valve (5). We could then give up the spring (7), the motor ensuring both the opening and closing of the valve (5).

In order to fix the activator (20) on the dosing tip (1) and prevent it from slipping during pouring, a piece of steel (13) is provided in the dosing tip (1) and the activator (20) a fixing magnet (27). The weight of the activator is sufficiently small that the magnetic force exerted by the attachment magnet (27) on the piece of steel (13) is sufficient to hold the activator in place during pouring of the liquid. This force is however weak enough to be easily countered by hand, when the server wants to resume its activator after the payment. It goes without saying that the piece of steel can be placed in the activator and the attachment magnet in the dosing tip. Likewise, other reversible fastening devices may be envisaged, such as clipping systems.

This single dosing tip (1) with a valve (6) is particularly intended for bottles which are stored the dosing tip directed upwards. No liquid can come out of the bottle if it is inverted without the activator being triggered. However, the orifice for the air inlet (11) is in the long run a source of leakage if the bottle is held too long upside down. It is therefore preferable to provide air inlet means that can be sealed when no liquid is taken.

The second embodiment of the invention therefore provides a dosing tip (1 ') provided with two valves (5, 15), the first (5) intended to let the liquid flow and the second (15) to pass through. air during sampling.

This second valve (15) is substantially identical to the first (5): it is provided with a second valve magnet (18) and a second spring (17) which tends to keep it closed.

The corresponding activator, the double activator, comprises all parts of the single activator (20) plus a second motor magnet preferably disposed on the same rack device (23), opposite the first motor magnet (25). Thus, in the rest position, the two motor magnets are too far from the two valve magnets (8, 18) to cause the opening of the two valves (5, 15). We are in a situation shown partially in FIG. 10, a situation similar to that shown in FIG. 4. When the engine starts, it simultaneously moves the two motor magnets to align them with the two valve magnets (8, 18) with which they interact by causing the opening of the two valves (5, 15). This is the situation shown partially in Figure 11, a situation similar to that of Figure 5. The liquid then flows through the spout (6) while the air is sucked into the bottle while passing through the second orifice (14) released by the second valve (15). After a defined period of time, the motor returns the motor magnets to their initial positions and the springs (7, 17) return the valves (5, 15) to the closed position, as in FIG.

It goes without saying that the second valve can also be activated only by the single suction force due to the underpressure forming in the bottle during the sampling of the liquid.

Moreover, the two motor magnets may not be integral and have non-simultaneous movements. In addition, the considerations made on the position of the first valve relative to its orifice and thus the orientation of the poles of the valve and motor magnets apply in the same way to the second valve.

The double dosing tip (1 ') and the double activator may also be provided with one piece of steel and the other with a fixing magnet, or any other reversible fastener, such as the simple dosing device.

The advantage of the metering device according to the invention lies in the fact that the displacement of the magnet requires only a small force that can be supplied without difficulty a miniature electric motor. The consumption of electricity by sampling is therefore very low. It is therefore possible to work with batteries or accumulators without the need to change or recharge them too often. The low weight of the engine and the necessary batteries makes the device according to the invention much lighter and more compact than those using the electromagnet technique. In addition, thanks to the use of batteries and radio transmission devices, it is possible to use the nomadic dosing device in a large radius of action, which can rise today to at least 20 meters with current systems.

List of references

1.

Dosing tip

2.

tip

3.

First cavity

4.

Orifice of the cavity

5.

First valve

6.

Spout

7.

First spring

8.

First valve magnet

9.

Bottle identifier

10.

Second cavity

11.

Air inlet port

12.

Valve cap

13.

Piece of steel

14.

Second orifice

15.

Second valve

17.

Second spring

18.

Second valve magnet

20.

activator

21.

Housing

22.

Engine

23.

Rack device

24.

Energy source

25.

First magnet motor

26.

Means of identification of the user

27.

Fastening magnet

Claims (17)

Dosing device comprising a dosing tip (1, 1 ') with a first valve (5) which can be opened or closed, this tip (1, 1') being attachable to a container, in particular a bottle, and an activator ( 20) which can be placed on the dosing tip (1, 1 ') in order to open the valve (5), the inside and the outside of the container being in communication when the first valve (5) is open, characterized in that the activator (20) is provided with a motor (22) for opening the valve (5). Device according to the preceding claim, characterized in that the dosing tip (1, 1 ') comprises a second valve (15), said second valve (15) being openable by the motor (22). Device according to claim 1 or 2, characterized in that the activator (20) is provided with means for causing the closing of the first valve (5) and / or the second valve (15) after a defined period of time. Device according to one of the preceding claims, characterized in that a tilt sensor is provided for activating the motor (22). Device according to one of the preceding claims, characterized in that the first valve (5) and / or the second valve (15) are integral with a first valve magnet (8) and / or a second valve magnet (18) respectively, and that the activator (20) is provided with a first motor magnet (25) and / or a second motor magnet which can be moved by the motor (22) to cooperate with the first valve magnet (8) and / or the second valve magnet (18) respectively for opening and / or closing the first valve (5) and / or the second valve (15) respectively. Device according to one of the preceding claims, characterized in that a first spring (7) and / or a second spring (17) are provided which tend to push the first valve (5) and / or the second valve in the closed position. (15) respectively when the motor (22) does not open them. Device according to claim 5 or 6, characterized in that the first motor magnet (25) and / or the second motor magnet are arranged in the activator (20) so as to be displaced each between a rest position where they do not cause the opening of the first valve (5) and / or the second valve (15) respectively, and an open position where they cooperate with the first valve magnet (8) and / or the second valve magnet (18) respectively causing the opening of the first valve (5) and / or the second valve (15) respectively, the first motor magnet (25) and the second motor magnet being preferably integral. Device according to one of claims 1 to 7, characterized in that the dosing tip (1, 1 ') is equipped with means (9) for identifying the container and / or the beverage contained in the container, these means of identification (9) of the container and / or beverage that can issue information about the beverage and / or the container. Device according to one of claims 1 to 8, characterized in that the activator (20) is provided with means (26) for identifying the server, these server identification means being able to transmit information concerning the server. Device according to one of Claims 8 or 9, characterized in that the activator (20) comprises a control unit able to receive information from a base station, and / or to receive or read the information from the means (26). identification of the server, and / or receive or read the information of the means (9) for identifying the container and / or the beverage, and adjust the opening time of the first valve (5) and / or the second valve (15) according to the information from the base station and / or means of identification of the server and / or means of identification of the container and / or drink, and / or be provided with means for transmitting information about the server, the beverage, the container and / or the opening time of the first valve (5) and / or the second valve (15) to the base station. Device according to one of claims 1 to 10, characterized in that the motor (22) is an electric motor powered by batteries (24) or an accumulator placed in the activator (20). Device according to one of Claims 1 to 11, characterized in that the transmission of information between the dosing tip and the control unit as well as between the control unit and the base station is a wireless transmission. . Dosing tip (1, 1 ') for a dosing device according to one of the preceding claims, the dosing tip (1, 1') being provided with a first valve (5) which can be opened by the activator ( 20) of the dosing device, a liquid that can flow through the dosing tip (1, 1 ') when the valve (5) is open, characterized in that the first valve (5) is provided with means (8). ) to cooperate with a motor (22) placed in the activator (20). Dosing tip (1 ') according to the preceding claim, characterized in that it comprises a second valve (15) provided with means (18) for cooperating with the motor (22) of the activator (20) of the dosing device in view of its opening. Dosing tip (1, 1 ') according to one of claims 13 or 14, characterized in that the means for cooperating with a motor (22) of the first valve (5) and / or the second valve (15) consist of a first valve magnet (8) and / or a second valve magnet (18) respectively engagable with a first motor magnet (25) and / or a second motor magnet respectively actuated by the motor (22), and optionally a first spring (7) and / or a second spring (17) respectively tending to keep closed the first valve (5) and / or the second valve (15) respectively when the first magnet motor (25) and / or the second motor magnet respectively are in the rest position. Removable actuator (20) for a dosing device according to one of claims 1 to 12, characterized in that it is provided with a motor (22). Activator according to the preceding claim, characterized in that it is provided with one or two motor magnets (25) displaceable by the motor (22), preferably solidarily.

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