WO1990008497A1

WO1990008497A1 - Dispensing device for materials in liquid or paste form

Info

Publication number: WO1990008497A1
Application number: PCT/EP1990/000135
Authority: WO
Inventors: Bernhard Wirtz-Odenthal
Original assignee: Scott-Feldmühle Gmbh
Priority date: 1989-01-27
Filing date: 1990-01-25
Publication date: 1990-08-09
Also published as: DK0455679T3; EP0455679A1; EP0455679B1; DE59002113D1; ATE91862T1; DE3902476A1

Abstract

A dispensing device for disinfectants consists of a wall fixture (1), a covering cap (20), an insert (2) together with a reservoir (49) and a module (21) arranged in the floor (13) of the insert (2). The upper region of the module (21) has a tubular shoulder (22) which surrounds a support (27) for a blade (26) for cutting the film cap (51) which surrounds the neck (50) of the reservoir (49). The tubular shoulder (22) has annular steps (123) on the outside on which a bellows (23) with a sealing lip (124) rests. The sealing lip (124) projects into the interior (125) of the shoulder (122) and seals the reservoir (49) at the neck (50).

Description

Dispenser for liquid or pasty goods

The invention relates to a dispenser for liquid ^" - or pasty goods, in particular disinfectants, which consists essentially of a wall mounting, a cover connected to the wall mounting and an insert for receiving a storage container for the goods to be dispensed, which is detachably connected to the wall mounting and carries a module on its bottom within a U-shaped profile, in which a pump with an inlet and an outlet valve and means for holding and opening the storage container are integrated, the U-shaped profile bearing holes on its legs in the region of the web for receiving stub axles of an actuating lever which extends below the cover plate.

Output devices of the aforementioned type are known for example from DE-OS 30 36 523 or DE-OS 32 31 806 and have also proven themselves in practice. These units either require manual operation, ie the dispenser must be used to dispense a lever can be operated, which is undesirable for areas in which increased hygienic requirements are placed, or in such a way that the dispenser works automatically, that is to say dispenses a metered amount of its contents without touching the hand.

A disadvantage of both known units that could be used as disinfectant dispensers is, however, that in any case the air has access to the medium to be dispensed, ie. H. on the one hand, evaporation can take place to a greater extent, on the other hand, oxidation of the medium to be dispensed is possible. Thirdly, it cannot be ruled out that impurities may also get into the medium, which, if the solvent has evaporated or decomposed by oxidation, may lead to fungal growth or the formation of resistant viruses and bacterial strains.

The present invention is therefore based on the object of creating a dispenser in which the evaporation of the solvent or the access of air to the medium to be dispensed is reduced to a minimum.

This object is achieved in a dispensing device for liquid or pasty goods, in particular disinfectants, which essentially consists of a wall mounting, a cover connected to the wall mounting and an insert for receiving a storage container for the goods to be dispensed, which is provided with the Wall mounting is releasably connected and carries a module on its bottom within a U-shaped profile, in which a pump with an inlet and an outlet valve and means for holding and opening the storage container are integrated, the U-shaped profile on its legs in the area of the web bearing holes for receiving stub axles of an actuating lever which extends below the cover plate, solved by the combination of the following features: the upper area of the module is provided with a tubular extension, which is a carrier for a knife for cutting the film cap of the Surrounds the storage container. The approach has a cylindrical cross section. It is provided with ring-shaped steps on the outside. A bellows with at least one sealing lip rests on the steps. The sealing lip protrudes into the interior of the neck and lies against the neck of the storage container. The bellows is held by a ^' tension plate which is part of the bottom of the insert.

When the storage container, which has the shape of an angular plate with a laterally offset bottle neck, is inserted, the bottle cap, which is usually designed as a film laminate and welded onto the bottle, is pierced by the knife. Almost at the same time, the bottle neck is enclosed by the sealing lip, which is pressed down and expanded by the neck attachment into the interior of the attachment. Encloses the sealing lip __ •

now the neckline with a defined line print. closes the interior of the opened bottle from the atmosphere. This means that neither solvents, generally alcohol, can evaporate, nor does the air and therefore oxygen have unimpeded access to the contents of the bottle, so it cannot have an oxidizing effect. If the solvent is alcohol or a solvent that evaporates even at low temperatures, a slight overpressure even forms between the sealing lip and the bottle interior or interior of the attachment, which additionally presses the sealing lip against the neck attachment. Only after repeated pumping does the pressure fall below or normal pressure and a vacuum forms in the storage container, i.e. the bottle. Depending on the bottle wall thickness and the material used, this vacuum is compensated by contraction of the bottle, but which is only possible up to a certain ^"degree Thereafter occurs between the sealing lip -. Which is deformed by the penetration of the bottle neck so down and so a kind of check valve forms - air in the interior of the batch, but only as much air as the amount withdrawn. This air has to pass through the medium in the bottle in order to get into the upper area of the bottle, ie the actual bottle bottom This means that an air bubble rises through the disinfectant. This air bubble is already enriched with solvent and becomes sterilized at the same time. The oxidation effect is also very low with an air bubble as the amount of air.

With increasing emptying of the container, more air logically collects in its upper area. However, since only a single air bubble passes the disinfectant according to the amount withdrawn, and the area through which the bubble strives upwards - namely the area in and around the neck of the storage container - is first pumped out, the air space that forms is above of the disinfectant firstly saturated with solvent, secondly filled with disinfected air, thirdly only the maximum amount of air that can come into contact with the contents and thus have an oxidizing effect, which corresponds to the total content of the storage container, i.e. the bottle. This ensures that neither evaporation nor contamination, nor oxidation to a greater extent, that is to say to the extent of the empirical values previously known for donors, is possible.

An advantageous embodiment of the invention provides that the bellows consists of nitrile rubber. Conveniently, there is the part of the output container that with the

Disinfectant comes into contact or can come from polypropylene or polyethylene. The latter two materials are against virtually all known disinfectants and the solvents used are resistant, they can be inexpensively deformed as injection molding and can also be colored in attractive colors. Nitrile rubber is also resistant to the media to be dispensed and also has the necessary elasticity and elongation that is required for a seal.

The hardness of nitrile rubbers can be adjusted within a wide range. A hardness between 40 and 60 Shore has proven to be the preferred range. If the hardness increases, the sealing lip no longer clings to the neck of the storage container in a fully sealing manner; if it becomes lower, greater wear and tear due to the insertion of the storage container is to be expected. Both cases lead to leakage of the dispensing container, i.e. H. that air enters the storage container and thus oxidation or evaporation.

The sealing lip of the bellows tapers in the direction of the neck of the storage container to a thickness between 0.1 and 1.0 mm. It is preferably between 0.6 and 0.7 mm. In conjunction with the hardness of the bellows and thus also the hardness of the sealing lip, an absolute seal is achieved which only allows air to pass between the lip and neck base when a vacuum is created in the storage container.

The sealing lip, i.e. the upper area of the bellows, forms a circular opening that the Encloses the neck of the storage container. In order to achieve a seal, the invention provides for a line pressure between the sealing lip and neck extension in this area which is between 5 and 25 N. This line pressure is achieved in that the clear width of the circle formed by the sealing lip is 1 to 3 mm smaller than the outside diameter of the neck of the storage container. In connection with the Shore hardness of the bellows, this results in a deformation of the sealing lip when the storage container is inserted, ie the sealing lip originally extending in the installed position of the bellows extends horizontally when the storage container is inserted, ie it is bent downwards. whereby the sealing lip seals against the neck. At the same time, this bending of the sealing lip has created a valve which, when there is sufficient differential pressure, that is to say when negative pressure is generated in the reservoir, allows air to enter the interior of the attachment if a certain vacuum has been created by the pumping process.

The length of the sealing lip, which according to a preferred embodiment of the invention is between 2 and 6 mm, is also important in this context. The length is also dependent on the hardness of the nitrile rubber used, ie with increasing hardness it is possible to work with shorter lengths, which reduces wear on the sealing lip, on the other hand the contact pressure must then be higher, ie in the upper one Range of the specified line pressure in order to achieve a good seal.

Electrically actuated dispensing devices have the great advantage that once they have been set to a specific dispensing quantity, they cannot be changed without undesired manipulation. In order to avoid the laying of electrical cables, they are usually equipped with their own power source, but must then be designed in such a way that they have minimal power consumption in order to be able to work independently of the network over a long period of time, i. That is, the batteries used should have a long life due to low power consumption.

Electromagnets require only a short current surge in order to be able to perform quite considerable work. If the battery is only loaded briefly, it is possible to use a lifting magnet to actuate a pump, the pump actuated in this way being a short-stroke pump. The preferred embodiment is the connection between the electromagnet and the diaphragm pump. Diaphragm pumps have the characteristic that initially only a slight pressure on the diaphragm is required, which must increase with increasing depth of indentation. Electromagnets, in particular the lifting magnets, have an analog characteristic, ie if the lifting magnet is switched on, it first exercises due to the relatively large gap distance only a small force. This force becomes stronger as the gap decreases. The performance curves of the diaphragm pump and the solenoid therefore correspond, that is, they form an ideal combination. The armature of the solenoid is expediently conical, so that a relatively large distance is available over which the magnetic field extends.

The lifting magnet has a pulling force of 1 - 100 N. The range is preferably between 15 and 45 N.

The range from 1 to 20 N is suitable for dispensing small quantities, that is to say for dispensing relatively highly concentrated goods, such as disinfectants or perfume. The range from 15 to 45 N fulfills the requirements which are generally placed on a soap dispenser which dispenses liquid or cream-like soap, whereas the upper range, that is to say the range between 50 and 100 N, is better suited for dispensing pasty goods which have a higher viscosity. Above 100 N, the current consumption increases despite the brief actuation of an electromagnet, so that the use of battery-operated electromagnets becomes uneconomical.

The stroke length of the magnetic armature is approx. 2 to 8 mm. Above 10 mm, the forces that are generated when the stroke movement is started are so low that considerable magnet sizes are required in order to achieve an effective movement at all. able to bring. On the other hand, this requires more electricity, ^* which is contrary to the task of developing an energy-saving unit. In order to nevertheless increase the stroke, ie to lengthen the movement of the pump membrane, a preferred embodiment of the invention provides that the pump membrane is connected to the electromagnet via an actuating lever. This actuating lever is designed as a two-armed lever, with the shorter of the two-armed levers normally being associated with the lifting magnet and the longer one with the diaphragm. This allows the movement, i.e. the stroke on the pump, to be controlled within fairly wide limits.

The control of the electromagnet by a proximity switch enables the non-contact dispensing of materials from the dispensing container without it being necessary, e.g. B. to install a foot switch, which would also ensure the hygienic conditions, but its installation means an increased outlay because it cannot be integrated into the housing of the output device. Furthermore, the separate installation of a switch in washrooms and toilets generally disrupts the cleaning of the floor.

The use of a capacitive switch is particularly recommended because here the risk of misuse and damage is lower on the one hand than is the case, for example, with a switch consisting of a light barrier is. Acoustic switches are often impaired by unintended effects, in which the noise source can be far outside the building, whereas the light barriers can be triggered to be triggered continuously by soiling and by, for example, placing paper on them. The capacitive switch, on the other hand, only responds to the change in capacitance, that is to say that it is triggered when the hand approaches the output device.

The proximity switch has a sensor circuit with two synchronously oscillating oscillators, one of which is designed as a fixed oscillator and the second can be influenced from the outside.

Such a circuit is designed so that both oscillators endeavor to always oscillate synchronously. The circuit is very stable, ie _; that relatively strong changes in capacitance are required to trigger a false pulse.

The sensor circuit as such contains four NAND-Schmitt triggers, two of which are connected as oscillators, one of which serves as a fixed oscillator and the other as a variable oscillator which can be influenced by the sensor plate. The third NAND-Schmitt trigger is provided as a phase discriminator with the interposition of a diode as a rectifier for the AC voltage generated in the phase discriminator and a fourth NAND-Schmitt trigger as a threshold switch. switches, with a differentiating capacitor being arranged behind the threshold switch, followed by a switching amplifier.

The proximity switch has a sensor circuit which consists of a CMOS IC and a sensor plate, a diode being connected between the sensor circuit and the current source and a capacitor connected in parallel with the sensor circuit.

The sensor plate is arranged under the housing of the dispensing device, so that the capacity changes when the hand comes closer under the dispenser. The current source, which consists of electrochemical elements, ie either contains a set of commercially available batteries or one or more rechargeable batteries, is connected to the sensor circuit via a diode, to which a capacitor is connected in parallel. This circuit ensures that the capacitor is first charged to the terminal voltage of the power source, which in turn allows the power source, that is to say the batteries, to be used to the last, since the charging of the capacitor can also take place relatively slowly. When the circuit is actuated, the capacitor itself transfers its charge to the sensor circuit, the diode ensuring that the voltage now does not flow back to the current source.

The sensor circuit advantageously has a trimmer for adjusting the circuit. This trimmer, which runs as a trimmer capacitor can be used to compensate for the tolerances _. that inevitably arise in the manufacture of the individual components of the circuit.

The response distance can be set by adjusting the sensor plate. However, it is also possible for a shielding electrode to be arranged in an adjustable manner. This makes it possible to detune the variable oscillator more or less.

When the output container is in the idle state, both the fixed oscillator and the variable oscillator, that is to say the two first NAND-Schmitt triggers, oscillate at essentially the same frequency. This frequency changes as soon as a user's hand approaches the output device of the sensor plate, that is to say that an oscillation difference then occurs between the fixed oscillator and the variable oscillator. This difference in vibration is evaluated by the third NAND-Schmitt trigger as a phase discriminator, ie an AC voltage is generated at its output. This alternating voltage is rectified by the diode and supplied to the fourth NAND-Schmitt trigger as a threshold switch. If the voltage exceeds the threshold, a differential capacitor is applied, which is followed by a switching amplifier. Via this the impulse is delivered to the electromagnet, which is excited and thereby actuates the pump diaphragm once, whereby a metered portion of the material contained in the dispenser is dispensed. If the sensitivity is to be changed, the variable oscillator can be detuned within a certain range by means of a shielding electrode which can be varied with respect to the sensor plate, so that a permanent defined alternating voltage arises at the discriminator, which is converted by the rectifier into a direct voltage, this direct voltage however, is below the threshold voltage of the threshold switch. As a result, the change in capacitance required to trigger the sensor circuit is significantly smaller, so that the response distance is increased.

A capacitor is connected in parallel with the current source. This advantageous arrangement also allows aging batteries to be used which have a higher internal resistance. The capacitor between the strokes is still charged and again reaches the terminal voltage of the battery, the electromotive force of which is practically constant when idling.

A change in capacity and thus the triggering of a circuit is not only achieved by approaching the hand, but also depends on many secondary circumstances. For example, the moisture in the wall on which the dispenser was mounted is included in the capacity, and the fill level of the dispenser is also included in the capacity. It would therefore be necessary, depending on the location of the donor, to give the donor a different capacity and in addition the capacity the respective level. It was previously thought that capacitive switches are absolutely unsuitable for such purposes.

The output device can be provided with a sensor circuit which is equipped with at least one shielding electrode which is connected to the zero potential. At least one shielding electrode is advantageously U-shaped.

On the one hand, the use of shielding electrodes enables the dispenser to be installed in any room without changing the capacity, i.e. both on damp and dry walls. Furthermore, when the fill level is changed in the dispensing device, there is no longer a change in capacitance. The design of a shielding electrode in a U-shaped design simplifies the construction of the entire unit, since the U-shaped design simultaneously shields three sides, so that only one connection to the zero potential is required for three sides. The shielding electrodes extend on the one hand along the fastening side of the dispenser, that is parallel to the wall to which the dispenser is to be attached, and they also extend below the dispensing container, with these two measures shielding against different wall moisture and different filling level given is. ι o-

At the same time, the side walls of the dispenser are expediently also shielded, if appropriate also the end wall, so that even if the dispenser is touched from the side, there is no output, which is particularly advantageous when cleaning the dispenser. In practice, this results in a shielding electrode, which is composed of several parts, shielding the entire lower region of the dispenser to the sides and upwards, so that a change in capacity can only be brought about by bringing the hand closer to the dispenser.

The response distance of the proximity switch is adjustable - the dispensers are usually located near the wash basin, generally even directly above the wash basin. In the latter case in particular, there may be the possibility that the distance between the wash basin and the proximity switch is too small due to special structural conditions, which already results in a change in capacity. Since it is now possible to make the capacitive switch less sensitive, that is to say that the hand has to be brought closer to the dispenser, it is possible to use also electrically actuatable dispensing devices wherever there is very limited space, the So donors very close to z. B. a sink must be brought up.

The sensor as such is usually charged with a lower voltage than the electromagnet drove. This also means that electricity consumption is lower. - If, for example, the electromagnet is operated via 5 mono cells, the current is supplied to the sensor on the third cell, ie the voltage is 4.5 volts.

A diode is connected between this tap and the sensor, and a capacitor is connected in parallel with the sensor. The capacitor is charged via the diode. When the voltage in the cells drops, i.e. when the magnet or relay is actuated, the voltage also drops towards the sensor. This is avoided by the diode since it switches off as soon as the capacitor voltage is higher than the battery voltage. The sensor is therefore fed directly from the capacitor. This capacitor could discharge back into the battery during actuation of the magnet if the diode were not interposed. Such a discharge would trigger a pumping motion, i.e. that is, the sensor would respond again and trigger the next circuit. The resulting cycle would continuously empty the soap dispenser. The interposition of the diode is therefore of considerable importance.

The electronic components, ie the power supply and the electromagnet, are arranged in a separate housing that can be separated from the output device. This housing is expediently an insert which is provided with at least one catch. By combining all electrical units in a separate housing, these parts can be largely encapsulated, so that they are protected against water even when the dispenser is inappropriately cleaned. A major advantage is also that the dispenser as such can remain installed on the wall while the insert with the electrical units is removed therefrom and these can be checked without the dispenser having to be disassembled.

Replacing and checking the power source is therefore very simple and can therefore also be carried out by the layperson.

When the electromagnet is actuated, the armature is moved in it. This movement must generally be transmitted to the pump membrane via an actuating arm. This means that • the electromagnet must be fixed absolutely rigidly in one position. It is therefore very important that the insert, which holds all electrical or electronic units, is provided with a catch so that it can be firmly anchored in the dispenser housing.

Electrochemical elements are used as the current source. This includes both commercially available batteries, for example mono cells, where several can be combined to form a set, and also accumulators which can be recharged after exhaustion. Both current sources deliver a low voltage and can therefore be used safely in wet rooms. Due to the low consumption, they guarantee a considerable dispensing time for the donor, which in normal use is approximately one year.

If the dispenser is used carelessly, the case may arise that e.g. B. Soap gets from below to the housing and the capacity is affected. This is only possible if the dispenser is touched from below, i.e. the soap is deliberately transported to a place where it is not wanted. In such a case, the dispenser would remain blocked after a single dispensing because of its switching, so that further dispensing is not possible.

This disadvantage can be eliminated by using the sensor plate as the lower end of the dispenser housing. The sensor plate can come into contact with soap without adversely affecting the dispenser and continues to guarantee perfect functioning of the dispenser, even if the soap has dried on the sensor plate.

Preferably, however, a different solution in which the formed plastic ^"bottom of the dispenser, an additional, electrically conductive layer is applied that no further connection is required. This electrically conductive layer may be applied by electroplating or vapor deposition, it could also be a sheet as additional coverage can be used. However, the application of a conductive lacquer has proven to be particularly expedient, although all these materials must not be covered by a further dielectric.

The invention is described below with reference to the drawings.

Fig. 1 shows a commercially available hand-operated dispensing container in section;

2 shows this dispensing container as an explosion diagram, the individual parts being shown in perspective;

Fig. 3 shows a perspective view of an electrically operated dispensing container in partial section;

4 shows an exploded diagram of individual parts of the dispensing container according to the invention;

5 shows a perspective view of the pump area of the dispensing container;

FIG. 6 shows a detail of a section of the dispensing container along the line VV in FIG. 5

7 shows the electronics housing in a perspective view from the rear;

8 shows the same housing from the front;

Fig. 9 shows the insert with the battery part;

10 shows the inside view of the electronics housing with sensor plate and shielding electrode with electromagnets arranged in the housing;

11 shows the associated insert;

Fig. 12 with an electronics housing without internals Rest window;

13 shows the associated plug-in unit with catches, built-in electromagnet and circuit board.

14 shows the circuit diagram of the circuit board.

The wall mounting (1) consists of a flat plate that forms the rear wall (7) and receives 3 holes (8) that are used to screw the wall mounting (1) to a room wall. The bores (8) are countersunk so that countersunk screws can be used. The rear wall (7) is delimited on the right and left by side walls (59) which have a triangular shape and are angled in the lower region. Between the angled ends of the side walls (59) extends a channel-shaped holder (6) which is attached directly to the rear wall (7) and the guide (3), the spring (4) and the hook-shaped extension (5) Receiving or fastening the output container (2) is used.

The guide (3) has the shape of a tab which is offset inwards on the rear wall (7) by the wall thickness of the rear wall (7). In its upper area it is separated from the rear wall (7) by spaces (60) arranged on the right and left, so that the bridge (11) in which the guide groove (10) of the dispensing container (2) ends along its rear wall (9) , grips the guide (3). The spring (4) carries at its upper end a hook-shaped extension (5) and is an integral part of the guide (3). It picks up when inserted - ->-> -

of the dispensing container (2) into the holding slot (12) located in the front part of the bridge (11), whereby the dispensing container (2) is locked in the wall mounting.

The output container (2) has a U-shaped profile (14) on its base (13). The web (16) of the U-shaped profile (14) extends parallel to the rear wall of the container (9) and is received by the trough-shaped holder (6) of the wall fastening (1). The legs (15) of the U-shaped profile (14) which are arranged on the right and left of the web (16) have a triangular profile, i. H. they taper from the container rear wall (S) to the container front wall (61) and each have a bearing bore (17) in the downward-pointing tip of the triangle, while an elongated hole (18) extends parallel to the bottom (13).

A module (21) is arranged under the bottom (13) of the dispensing container (2), which partially penetrates the container bottom (13) and protrudes into the insert interior (25). Below the inlet valve (22), the module (21) is designed as a ring extension and here forms the body of the pump (29), ie a tubular connection piece, which is closed off by the pump membrane (56). The pump membrane (56) has a pot shape. Its central base is reinforced, the edge surrounding the cylindrical part of the pump (29) is connected to the module (21) by a retaining spring ring (55). A pump channel (30) extends from the pump (29) in the direction of the outlet valve (31). A carrier (27), which is located below the knife (26), is arranged in the interior (125) of the tubular extension (122). On the outside, the tubular extension (122) has steps (123) that receive the bellows (23). The clamping plate (126) placed over it, which is part of the bottom (13) of the insert (2), clamps the conical bellows (23) so that it lies between the steps (123) of the extension (122) and the counter steps (28 ) of the clamping plate (126) lies sealingly. The sealing lip (124) protrudes into the interior (125) and lies sealingly against the neck extension (50) of the storage container (49).

The pressure occurring during the pumping process closes the inlet valve (22) and lifts it against the direction of action of the compression spring (62) by pressure on the pressure flange (36) of the valve body (32), whereby the valve body tip (33) in the nozzle bore (35) Valve cap (34) releases, so that disinfectant can escape from the nozzle bore (35). To avoid z. B. due to temperature changes in the pressure in the pump channel (30) and the valve leaks, a compensating bore (24) is provided.

The pump membrane (56) is actuated via an actuating lever (19). The actuating lever (19) consists of a handle (37) and a cover plate (38), which covers the entire bottom area of the soap dispenser closes and thus prevents contamination of the pump (29) and the outlet valve (31) from the outside. On the cover plate (38) a Druckpclsrer (40) is arranged, which consists of a cylindrical attachment with a flattened spherical neck. This pressure pad (40) engages in the movement of the handle (37) on the pump membrane (56) and presses it into the module (21), whereby the disinfectant located there flows out through the outlet valve (31).

A stop screw (41) arranged in the front area of the cover plate (38) serves to limit the movement of the handle (37) and thus to regulate the depth of penetration of the pressure cushion (40) into the pump membrane (56). This regulation sets the quantity to be dispensed. The stop screw (41) is usually designed as a grub screw, which is arranged self-locking in the cover plate (38).

The handle (37) is mounted via articulated levers (39) which are resiliently connected to the handle (37). They carry at their ends outwardly directed stub axles (54) which engage in the bearing bores (17) of the U-shaped profile (14).

The dispenser can also be actuated with the arm, for which purpose the actuating lever (19) is extended by spacers (42) so that the spacers (42) grip the handle (37) with the Connect the cover plate (38) and the articulated lever (39). The cover (20) is provided in its lower area with two hinge arms (43), on which there are pivot pins (58). These pivot pins (58) engage in the elongated holes (18) of the U-shaped profile (14) ^' , so that the cover (20) can be moved in the direction of the wall fastening (1) so that the nose (46), which delimits the recess (45) in the cover (20), engages behind the catch (47) of the dispensing container (2).

The recess (44) in the base area of the cover (20) forms an opening for the outlet valve (31) through which the disinfectant emerges.

The viewing windows (48) are located in the hood side walls (63) of the cover hood (20) and are only delimited on one side by the hood side wall (63). The opposite limitation is made by the wall mounting (1), d. H. the side walls (59).

The storage container (49) has a cuboid shape and has an outwardly projecting neck extension (50) on one long side, which is covered with a film cap (51). The reservoir bottom (64) has two opposite recesses (52) which leave a web (53) in the middle. This web (53) serves to insert the storage container (49) into the dispensing container (2), the recesses (52) allow the web (53) to be gripped with my fingers.

The soap dispenser is opened by means of a lever (57) which consists of a flat material bent at one end in a crescent shape. The crescent-shaped piece of the lever (57) is inserted into the recess (45) and the lever (57) is then moved upwards. The lever (57) is supported on the wall (in Fig. 3 on the electronics housing 101) and lifts the nose (46) of the cover (20) from the catch (47) of the dispensing container (2) so that the cover (20) in the slot (18) through the hinge pins (58), moved towards the operator and can be folded down to release the dispensing container (2). 3 to 13, the mechanism of the cover is similar, but was not shown in the drawings.

Fig. 3 shows how the same dispenser can be converted into an electronically actuated dispenser by replacing the actuating lever (19). The actuating lever (19) is designed in this case as a double lever, that is to say equipped with two arms, one arm of which, as before, carries the pressure cushion (40) which acts on the pump membrane (56), whereas the second arm through the Magnet armature (70) of the electromagnet (65) is applied. In this embodiment, the electromagnet (65) is permanently installed in the rear area of the electronics housing (101) the board (104) is attached to it, which absorbs the electric units for controlling the electromagnet (65).

The lever side of the actuating lever (19), which carries the pressure cushion (40), has an extension (105), in the front area of which the return spring (66) is arranged. This return spring (66) essentially has the task of balancing the weight of the magnet armature (70) and thereby largely relieving the pressure on the pump diaphragm (56).

Since all electrical components should be completely separated from the wet part of the dispenser if possible, they are encapsulated, as shown in FIGS. 7 and 8. In the simplest form, this can be done in that the electronics housing (101) is closed towards the front and has only one opening (106) over which the electromagnet (65) is located and into which the actuating lever (19) engages . In this embodiment, as shown in FIG. 7, the electromagnet (65) is accessible from the rear (107) of the electronics housing (101), as is the circuit board (104) and the connection capacitor (98).

The sensor plate (71) is arranged on the bottom of the pocket (108) of the electronics housing (101). Above it is the shielding electrode (69), which shields the sensor plate (71) from being influenced by the fill level in the storage container (49). Screws not shown are by ' ^• fi

The 3 mounting holes (109) are guided and are used to attach the electronics housing (101) to a house wall or the like.

The lower part of the pocket (108) is provided with a conductive layer (110), which prevents the disinfectant dispensing from the dispenser from being impaired by dirtying the underside of the pocket.

The insert (68), which is inserted vertically from above into the electronics housing (101), contains the current source, that is, the electrochemical elements (72). These electrochemical elements are shown as monocells in FIG. 9, but rechargeable batteries can also be used instead. The insert (68) is electrically connected to the electronics housing (101) via the contact springs (111). 10 shows contact springs (111). There is different voltage between the individual contacts (111), since the electromagnet (65) must be operated at full voltage in order to provide the required power, but the proximity switch (67) as such can be operated at a lower voltage, as a result of which current is saved. The proximity switch (67) is composed of the circuit board (104), the starting capacitor (98) and the sensor plate (71), which are accommodated in the electronics housing (101) according to FIG. 10.

An adjusting screw (112) made of insulating Mat rial allows in the pocket (108) adjusting the Ansprechent rning by adjusting the height of the Abschirmele ^'ktrode (69) of the Ent ie fernung, wherein said dispenser in proximity of the hand below the dispenser, ie in the area of the sensor plate (71), disinfectant dispenses.

On ah ε bores (113) serve to screw the dispenser (2) to the electronics housing (101). They are arranged in lugs (114), which are part of the back (107) of the electronics housing (101).

In Fig. 7 and Fig. 8, as shown, the electrical parts were encapsulated in that they were enclosed by the electronics housing (101) to the front, that is to the dispenser side, so that they could only be reached from the wall side. 10 shows the alternative solution, i. H. All electrical parts are arranged on the back (107) of the electronics housing (101) and are thus openly accessible from the front. The dispenser is covered by the insert (68), as shown in FIG. 11, and its front side (115) except for the opening (106) through which the actuating lever (19) engages the electromagnet (65) and the elongated holes (116) is completely closed.

12 and 13 show a further pairing of electronics housing (101) and insert (68), here the insert (68) accommodates all the electrical and electronic parts that require maintenance need. These are, on the one hand, the electrochemical elements (72) that have to be recharged or replaced, on the other hand, the circuit board (104), which may have to be checked, and furthermore the electromagnet (65) and the connecting capacitor (98). Since the electromagnet (65) always has to assume a fixed, not changing position relative to the actuating lever (19) if the same amount of dispensing is to be achieved by the pump movement, the insert (68) is locked in its position. The locking takes place in the right and left wing (117) of the electronics housing (101) by introducing catch windows (103) and by resilient tabs (119) arranged on the insertion side walls (118), which spring outwards from the insertion side wall (118) and thus engage in the catch windows (103) of the electronics housing (101). When inserting the insert (68) into the electronics housing (101), these resilient tabs (119) are pressed inwards and only come out again at the catch window (103), where they lock the insert (68) in the intended position. In this embodiment shown in FIG. 12, the electronics housing (101) only has parts in the area of the pocket (108) that are connected to the proximity switch (67) via the shielding contact (120) and the sensor contact (121).

14 shows the circuit diagram of the proximity switch (67), that is to say essentially the wiring of the units which are on the circuit board (104) are arranged. The sensor plate (71) is connected to the variable oscillator (79) via a fixed capacitor (76), which is used to separate the DC voltage. This variable oscillator (79) is designed as a feedback NAND-Schmitt trigger. The resistor (78) serves as a feedback resistor and at the same time for setting the frequency. Furthermore, the frequency is set via the frequency adjustment capacitor (73). The same happens.

Frequency setting of the fixed oscillator (80) by the fixed capacitor (80) and the trimmer capacitor (74). A resistor (77) is used to discharge the static charge on the sensor electrode.

Five monocells, each with a voltage of 1.5 volts, are used as the electrochemical element (72), so that the entire electrochemical element (72) has an operating voltage of 7.5 volts. To supply the IC, the voltage is branched off behind the third cell and fed via the supply diode (97) to the parallel IC capacitor (96), which is connected to the positive supply point (122) of the IC. The outputs of the two oscillators (79, 80) are connected to the two inputs of the third NAND Schitt trigger, which is connected as a phase discriminator (81). The resulting low-frequency voltage and the filter capacitor (83) lead via the filter resistor (82); to separate high-frequency residues, the isolating capacitor (84) is applied, behind which the short-circuit diode (86) for the negative one Calf wave and the rectifier diode (85) for the NAND-Schmitt trigger (88) is arranged. The NAND-Schmitt trigger (88) is connected to ground via the working resistor (89) and also has a connection to measuring point M, which is used to level the device. A charging capacitor (87) is connected in parallel to the short-circuiting diode (86) and is arranged in front of the NANDSchmitt trigger (88), to which the charging resistor is connected

(90) and the differentiating capacitor (91) are connected downstream. The differential capacitor

(91) is connected to the discharge resistor (92) and the feedback capacitor (93), which acts on the electromagnet (65) via the driver capacitor (99) and the power transistor (100). In parallel to this, the diode (95) for short-circuiting voltage peaks when switched off is connected. The

The connecting capacitor (98) is arranged parallel to the electrochemical element (72), so that the electromagnet (65) is always supplied with the full voltage when the power transistor (100) responds. The base of the power transistor (100) and the driver transistor (99) are connected to ground via an emitter resistor (94).

Claims

Dispensing device for liquid or pasty goods, in particular disinfectants, which essentially consists of a wall mounting, a cover connected to the wall mounting and an insert for receiving a storage container for the goods to be dispensed, which is detachably connected to the wall mounting and is located on the bottom within one U-shaped profile carries a module in which a pump with an inlet and an outlet valve and means for holding and opening the storage container are integrated, the U-shaped profile on its legs in the region of the web bearing holes for receiving stub axles of an actuating lever which extends below the cover plate, characterized by the combination of the following features: the upper region of the module (21) is provided with a tubular extension (22) which has a carrier (27) for a knife (26) for cutting open the film cap (51) the Surrounds reservoir (49), the approach (122) has cylindrical Indian

Cross section. It is provided on the outside with annular steps (123), on the steps (123) there is a bellows (23) provided with at least one sealing lip (124), the sealing lip (124) protrudes into the interior

(125) of the neck (122) and lies on the neck neck (50) of the storage container (49), the bellows (23) is from a clamping plate

(126), the part of the bottom (13) of the insert

(2) is held.

2. Output device according to claim 1, characterized in that the bellows (23) consists of nitrile rubber.

3. Output device according to one of claims 1 and 2, characterized in that the bellows (23) has a Shore hardness between 40 and 60.

4. Output device according to one of claims 1 to 3, characterized in that the sealing lip (124) of the bellows (23) in the region of the neck extension (50) of the storage container (49) has a thickness between 0.1 and 1.0 mm.

5. Output device according to one of claims 1 to 4, characterized in that the Sealing lip (124) of the bellows (23) in the area of the housing attachment (50) of the storage container (49) has a thickness of between 0.6 and 0.7 mm.

6. Output device according to one of claims 1 to 5, characterized in that the sealing lip (23) bears with a line pressure between 5 and 25 N on the neck (50) of the storage container (49).

7. Output device according to one of claims 1 to 6, characterized in that the inside diameter of the bellows (23) on the sealing lip (124) is 1.0 to 3.0 mm smaller than the outside diameter of the neck extension (50) of the storage container - (49) is.

8. Output device according to one of claims 1 to 7, characterized in that the sealing lip (23) has a length between 2 and 6 mm.

9. Output device according to one of claims 1 to 8, characterized in that the clear diameter of the extension (122) is 4 to 10 mm larger than the outer diameter of the neck extension (50) of the storage container (49).