EP1541061B1 - Furniture - Google Patents

Furniture Download PDF

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Publication number
EP1541061B1
EP1541061B1 EP20040027360 EP04027360A EP1541061B1 EP 1541061 B1 EP1541061 B1 EP 1541061B1 EP 20040027360 EP20040027360 EP 20040027360 EP 04027360 A EP04027360 A EP 04027360A EP 1541061 B1 EP1541061 B1 EP 1541061B1
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EP
European Patent Office
Prior art keywords
item
drive unit
collision
switch
furniture according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
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EP20040027360
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German (de)
French (fr)
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EP1541061A1 (en
Inventor
Stefan Langejürgen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dewert Antriebs und Systemtechnik GmbH and Co KG
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Dewert Antriebs und Systemtechnik GmbH and Co KG
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Publication of EP1541061A1 publication Critical patent/EP1541061A1/en
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Publication of EP1541061B1 publication Critical patent/EP1541061B1/en
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    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C19/00Bedsteads
    • A47C19/04Extensible bedsteads, e.g. with adjustment of length, width, height
    • A47C19/045Extensible bedsteads, e.g. with adjustment of length, width, height with entire frame height or inclination adjustments
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C20/00Head -, foot -, or like rests for beds, sofas or the like
    • A47C20/04Head -, foot -, or like rests for beds, sofas or the like with adjustable inclination
    • A47C20/041Head -, foot -, or like rests for beds, sofas or the like with adjustable inclination by electric motors

Definitions

  • the present invention relates to a furniture according to claim 1.
  • the component in question is in a preferred embodiment, a sitting or a reclining furniture.
  • the furniture in question are usually equipped with several components to be adjusted.
  • the adjusting device can be designed so that each component to be adjusted is coupled to an electromotive drive unit.
  • the electric motor drive unit is referred to as a single drive in such a case, since it contains only one output member.
  • two components can be coupled to an electromotive drive unit which contains two output members.
  • Such drive units are referred to as dual drives.
  • the design of the fitting or the lever assembly depends on the design of the furniture and the adjustment.
  • the output member of a fitting or a lever assembly may be coupled directly to the component to be adjusted or via other levers, rods and similar components.
  • the user of the furniture triggers the respective adjustment function by triggering a signal by means of a manual switch, which is usually equipped with a plurality of actuators, since all electric motor drive units can be controlled via this hand switch if necessary via the control unit.
  • a manual switch which is usually equipped with a plurality of actuators, since all electric motor drive units can be controlled via this hand switch if necessary via the control unit.
  • a signal is fed to the control unit, whereby the corresponding electric motor drive unit is functionally controlled, but it can also be used directly to control the drive units.
  • the end positions of the component to be adjusted or the components to be adjusted can be done for example by limit switches. These may be mounted on the components to be adjusted, but then cable connections to the control unit are necessary. It is therefore provided in the usual drive units that when using limit switches they are mounted within the drive unit. Many drive units consist of a spindle drive, wherein the spindle is surrounded by a flange tube. The limit switches are then functionally inserted into the flange tube.
  • the adjustment described above has proven extremely useful in practice. For furniture in which pivotable components are hinged to a fixed frame, and their movement areas are separated or do not overlap, the adjustment is easy to use.
  • a drive for adjusting, especially at tables or seating or reclining furniture known, which is equipped with at least one electric motor, with at least one circuit for starting and / or reversing the electric motor and at least one actuator, and the at least one adjusting element an adjustment of the furniture acts. and weleher in at least one pre-end position is movable, wherein the circuit comprises at least one limit switch, which causes a shutdown or switching of the motor upon reaching the end position of the actuator.
  • This drive comprises a DC motor, a fixedly connected with this reduction gear and a driven via the gear screw with a non-rotatably mounted on this thrust nut as an actuator. The two end positions of the push nut are limited by limit switches on which the push nut runs.
  • the drive parts of this drive are disordered in a housing.
  • the limit switches are inside the housing and this drive is a single drive. with which only a single furniture component can be adjusted.
  • the possibility. that simultaneously collide components to be adjusted, is not given in this drive, since it includes only one retractable and retractable component, namely the patch on the thrust nut lifting tube.
  • the invention has for its object to design a piece of furniture at the beginning beschricbenen type so that is effectively prevented by the simplest means. that a collision of components occurs during an adjustment process.
  • the stated object is achieved by arranging at least one collision switch in the area of movement of each component to be treated such that it can be actuated before a collision of two or more components of the furniture, so that the respective electromotive drive unit can be actuated in an operable manner by the triggered signal. and that the driveability of the drive unit during the duration of the operation of the collision switch or the collision switch is carried out, or that a timer is proposed to extend the drivability of Antriebseinbeit.
  • Each collision switch is electrically connected to the control unit via cables. As soon as a collision switch is actuated, a signal is triggered via the control unit, whereby the function of the drive unit is terminated or changed in order to extend the controllability of the drive unit (13, 14). In particular, each drive motor is protected against overloading by the collision switch or, by the collision switch, which can be used as the most sensitive component of the adjusting device. Some furniture can also be built so complex that a cable installation proves to be extremely difficult. In such cases, the signal transmission to the control unit could also be wireless via radio or infrared signals.
  • the respective electromotive drive unit to be controlled to prevent a collision be reversible by the signal triggered by the collision switch. Since normally the movement leading to a collision is derived from another drive unit, a sufficient distance is created by the reversal, so that the collision is prevented during the further movement of the component. For this distance is sufficiently large, or that a safety margin is achieved, it is provided that after the reversal of the drive unit after a certain return-time the drive unit associated with the triggering collision switch can be stopped. This avoids unnecessary movements.
  • the collision switch is usually equipped with a plunger so that the associated drive unit remains switched on as long as the plunger is actuated.
  • the return time of the drive unit is greater than the switching time of the collision switch. As the switching time of the collision switch, the time is considered where the collision switch is activated by retracting or pressing the plunger.
  • This electrical timer consists in a preferred embodiment of a transistor and a capacitor.
  • the capacitor causes the switched transistor remains conductive for a certain time.
  • the return time of the drive unit could be determined by a mechanical timer.
  • This timer could be, for example, the plunger, which is braked extended after release by the driven component. The extension time is thereby extended so that the collision switch is activated beyond the normal switching time.
  • each collision switch could be fixed to a fixed or to a movable component of the furniture.
  • each drive unit of the adjusting device can be designed either as a linear drive or as a rotary drive and also in the form of a single or double drive. If the drive unit is designed as a double drive could even be a drive unit designed as a linear drive and the other drive unit as a rotary drive.
  • the control unit of the furniture drive must be designed so that each collision switch can fully fulfill its function. If one of the collision switches is actuated or activated to prevent the collision, a changeover module is activated in the control unit so that the drive unit is switched over when one or more collision switches are actuated.
  • the Um Tavernbaustein consists of two relays, which are linked together so that when pressing at least one collision switch for reversing the drive unit, both relays are attracted. The first relay is addressed by a self-holding switch, while the second relay is controlled by a timer. Both relays are now switched. The drive unit is now reversed in its travel direction as long as the timer is active. Thereafter, the drive unit is stopped and remains in this state until either the collision switch is pressed again or the power supply is interrupted. This also coincides the latching of the first relay.
  • the switching frequency is reduced in the event of a collision, whereby the wear of the controller and the drive units is reduced.
  • the switching frequency is reduced such that the furniture is not put into resonance-like vibrations, whereby the life of the mechanical adjustment components of the furniture is increased.
  • a simple design would be, for example, housed in a separate housing switch with a switching contact and an actuation of this contact by a plunger, which in turn is made directly from the furniture.
  • a collision switch could be coupled to a type of pull rope or a shift linkage.
  • the actuating tappet may be coupled to the shift linkage, so that a switching operation is triggered by actuation of the shift linkage.
  • Another design has a rope or cord-shaped actuator, which is in operative connection with the plunger of the collision switch. will this Actuator displaced from its rest position to another position, the plunger of the collision switch is actuated, which switches the switching contact.
  • the bed 10 is equipped with wheels, as it can be used, among other things, in the hospital or nursing home.
  • the bed 10 includes a base frame 11 and a mattress frame 12 which is adjustable relative to this base frame 11.
  • the mattress frame 12 is adjusted by four drive units 13, 14 arranged in the end regions, which are arranged in pairs in the end regions.
  • the drive units 13, 14 are well known. In the illustrated embodiment, they are designed as linear drives in the form of individual drives.
  • On the base frame 11 four wheels 15 are arranged.
  • the drive units 13, 14 can with their output members, For example, the Hubrohren be coupled directly to the mattress frame 12.
  • the adjustment is formed from the drive units 13 or 14 and a fitting.
  • collision switches 16, 17 are mounted on the base frame 11 on the side facing the mattress frame 12. These collision switches can be normal limit switches whose plungers can be moved in and out. In the illustrated embodiment, the plunger are facing the mattress frame 12.
  • the collision switches 16, 17 are kept inoperative.
  • the mattress frame 12 is raised at one end, it is lowered at the opposite end corresponding to the connection of the drive units 13, so that in a certain inclined position of the mattress frame 12 collides with the base frame 11.
  • the right collision switch 16 in the illustration is actuated, ie the plunger is retracted. It can also be mounted on each end several collision switches.
  • the collision switch 16 a signal is triggered, which is fed to the control unit, whereby the drive unit 13 is reversed, as will be explained in more detail.
  • the drive unit 13 is turned on after the reversal, even after the mattress frame is moved away from the plunger of the collision switch 16 again.
  • the FIG. 4 shows a block diagram for the control of the drive units 13, 14.
  • the functions of the bed 10 are triggered by a manual switch 18 or a manual control device.
  • the manual switch 18 is equipped with a plurality of actuators in the form of push buttons 18a.
  • the manual switch 18 is connected by a cable to the control unit 19, in whose housing the power supply can be installed. However, this could also be placed elsewhere.
  • the controller 19 may include a control circuit and a load circuit and drive a plurality of drive units 13, 14. However, it can also consist of a power supply and a distribution block, so that the push buttons 18a of the manual switch 18 itself switch the load.
  • the collision control (23) also includes a Um Kunststoffbaustein 20, which as electrical Solution can be viewed to redirect the respective drive unit 13 or 14 from a collision.
  • a signal in the collision control (23) is fed from the respective collision switch 16 or 17.
  • the respective drive unit 13 or 14 is reversed. So that the drive unit 13 or 14 continues to run even after the release of the plunger of the respective collision switch 16, 17, either an electric timer 21 is installed in the collision control (23) or the collision switch 16 or 17 is equipped with a mechanical timer 22.
  • This mechanical timer 22 could be a brake or a damper that causes the plunger of the collision switch 16 or 17 to be extended with a delay. After a predetermined time after the reversal of the respective drive unit 13 or 14, the respective drive unit 13 or 14 is stopped.
  • the collision control 23 may be arranged in the power supply line of the drive unit 13, 14.
  • An advantageous further development allows the collision control 23 to be integrated in the drive unit 13, 14. This is symbolically illustrated by a common housing 24.
  • the advantage is that no modifications to the controller 19 are required and purely individually, a drive unit 13, 14 can be installed with or without collision control 23 in the furniture.
  • the FIG. 5 shows a possible embodiment of a circuit diagram.
  • the electrical timer consists of the capacitor C3 and the resistor R3.
  • the relay K2 is a thyristor TH1 and the relay K1 a transistor T1 is switched on. Relays K1 and K2 are changeover contact relays. If one of the collision switches 16, 17 is actuated, a circuit is closed. In this case, the thyristor TH1 and the transistor T1 is conductive, whereby the respective drive unit 13, 14 is reversed. As soon as the plunger of the respective collision switch 16, 17 is released, in the solution with the self-holding switch (thyristor TH1), the relay K2 continues to be switched or energized.
  • the thyristor TH1 forms the self-holding switch
  • the relay K1 remains energized or switched for a certain time, because the transistor T1 remains conductive through the capacitor C3.
  • the polarity to the drive unit 13, 14 so that the drive unit 13, 14 now moves in the opposite direction and as long as the timer consisting of the capacitor C3 and the resistor R3 to the transistor T1, the relay K1 switches.
  • the drive unit 13, 14 is now stopped by the power supply to the electric motor of the drive unit 13, 14 is disconnected.
  • the electric motor is preferably a permanently excited DC motor, which can be short-circuited after disconnecting the power supply, as the contacts of the relays K1 and K2 in the FIG. 5 clarify. This leads to a rapid deceleration of the rotor of the electric motor.
  • the thyristor TH1 continues to be active as a self-holding switch, so that a renewed startup of the drive unit 13, 14 takes place only when the collision switch 16, 17 is operated again or the circuit is de-energized for a moment.
  • the capacitor C3 can be omitted.
  • the thyristor TH1 are two more resistors R1 and R2 and a further capacitor C2 connected.
  • the invention is not limited to the illustrated embodiments. It is essential that at least one collision switch is arranged in the movement region of each component to be adjusted, which causes a reversal of the drive unit 13, 14 takes place before a collision of two mutually movable components. Each collision switch could therefore also be referred to as a collision avoidance switch.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Nursing (AREA)
  • Invalid Beds And Related Equipment (AREA)

Description

Die vorliegende Erfindung betrifft ein Möbel gemäß Anspruch 1.The present invention relates to a furniture according to claim 1.

Das in Rede stehende Bauteil ist in bevorzugter Ausführung ein Sitz- oder ein Liegemöbel. Die in Rede stehenden Möbel sind üblicherweise mit mehreren zu verstellenden Bauteilen ausgestattet. Die Verstelleinrichtung kann so ausgelegt sein, dass jedes zu verstellende Bauteil mit einer elektromotorischen Antriebseinheit gekoppelt ist. Die elektromotorische Antriebseinheit wird in einem solchen Fall als Einzelantrieb bezeichnet, da sie nur ein Abtriebsglied enthält. Es ist jedoch alternativ auch möglich, dass zwei Bauteile mit einer elektromotorischen Antriebseinheit gekoppelt sind, die zwei Abtriebsglieder enthält. Derartige Antriebseinheiten werden als Doppelantriebe bezeichnet. Die Verbindung zwischen dem Abtriebsglied der elektromotorischen Antriebseinheit und dem zu verstellenden Bauteil des Möbels erfolgt über einen Beschlag oder über eine Hebelanordnung. Die Auslegung des Beschlages oder der Hebelanordnung richtet sich nach der Bauform des Möbels sowie dem Verstellvorgang. Das Ausgangsglied eines Beschlages oder einer Hebelanordnung kann direkt mit dem zu verstellenden Bauteil gekoppelt sein oder aber über weitere Hebel, Stangen und ähnliche Bauteile.The component in question is in a preferred embodiment, a sitting or a reclining furniture. The furniture in question are usually equipped with several components to be adjusted. The adjusting device can be designed so that each component to be adjusted is coupled to an electromotive drive unit. The electric motor drive unit is referred to as a single drive in such a case, since it contains only one output member. However, it is alternatively also possible for two components to be coupled to an electromotive drive unit which contains two output members. Such drive units are referred to as dual drives. The connection between the output member of the electric motor drive unit and the component to be adjusted of the furniture via a fitting or via a lever arrangement. The design of the fitting or the lever assembly depends on the design of the furniture and the adjustment. The output member of a fitting or a lever assembly may be coupled directly to the component to be adjusted or via other levers, rods and similar components.

Der Benutzer des Möbels löst die jeweilige Verstellfunktion aus, indem er ein Signal mittels eines Handschalters auslöst, der üblicherweise mit mehreren Betätigungselementen ausgestattet ist, da sämtliche elektromotorischen Antriebseinheiten über diesen Handschalter ggf. über die Steuereinheit ansteuerbar sind. Bei Betätigung eines Betätigungselementes des Handschalters wird ein Signal in die Steuereinheit eingespeist, wodurch die entsprechende elektromotorische Antriebseinheit funktionsgerecht angesteuert wird, es können jedoch auch die Signale direkt zur Ansteuerung der Antriebseinheiten genutzt werden.The user of the furniture triggers the respective adjustment function by triggering a signal by means of a manual switch, which is usually equipped with a plurality of actuators, since all electric motor drive units can be controlled via this hand switch if necessary via the control unit. Upon actuation of an actuating element of the manual switch, a signal is fed to the control unit, whereby the corresponding electric motor drive unit is functionally controlled, but it can also be used directly to control the drive units.

Die Endstellungen des zu verstellenden Bauteils bzw. der zu verstellenden Bauteile kann beispielsweise durch Endschalter erfolgen. Diese können an den zu verstellenden Bauteilen montiert sein, wobei dann jedoch Kabelverbindungen zur Steuereinheit notwendig sind. Es ist deshalb bei den üblichen Antriebseinheiten vorgesehen, dass bei einer Verwendung von Endschaltern diese innerhalb der Antriebseinheit montiert sind. Viele Antriebseinheiten bestehen aus einem Spindeltrieb, wobei die Spindel von einem Flanschrohr umgeben ist. Die Endschalter sind dann funktionsgerecht in das Flanschrohr eingesetzt. Die zuvor beschriebene Verstelleinrichtung hat sich in der Praxis außerordentlich bewährt. Bei Möbeln, bei denen an einem festen Rahmen schwenkbare Bauteile angelenkt sind, und deren Bewegungsbereiche getrennt sind bzw. sich nicht überlappen, ist die Verstelleinrichtung problemlos einzusetzen. Es sind jedoch auch Möbel bekannt, beispielsweise Sessel, Pflegebetten und dergleichen, bei denen sich die Bewegungsbereiche überlappen bzw. bei einem Bett lässt sich der gesamte Matratzenrahmen gegenüber dem Untergestell nicht nur in der Höhe verstellen, sondern auch in eine Schräglage bringen. Bei solchen Möbeln besteht dann die Gefahr, dass entweder die zu verstellenden Bauteile gegeneinander kollidieren oder dass das zu verstellende Bauteil mit einem ortsfesten Bauteil kollidiert. Der Antriebsmotor der elektromotorischen Antriebseinheit würde bei solchen Kollisionsfällen nicht abgeschaltet, sodass es zu ciner erhöhten Stromaufnahme kommt, sodass der Motor in äußerst kurzer Zeit betriebsunfähig ist. Darüber hinaus besteht die Gefahr, dass Bauteile des Möbels beschädigt werden.The end positions of the component to be adjusted or the components to be adjusted can be done for example by limit switches. These may be mounted on the components to be adjusted, but then cable connections to the control unit are necessary. It is therefore provided in the usual drive units that when using limit switches they are mounted within the drive unit. Many drive units consist of a spindle drive, wherein the spindle is surrounded by a flange tube. The limit switches are then functionally inserted into the flange tube. The adjustment described above has proven extremely useful in practice. For furniture in which pivotable components are hinged to a fixed frame, and their movement areas are separated or do not overlap, the adjustment is easy to use. However, there are also furniture known, for example, armchairs, nursing beds and the like, in which overlap the movement areas or in a bed, the entire mattress frame relative to the base not only adjust in height, but also bring in an inclined position. In such furniture then there is a risk that either the components to be adjusted collide against each other or that the component to be adjusted with a stationary component collides. The drive motor of the electric motor drive unit would not be turned off in such cases of collision, so that there is an increased power consumption, so that the engine is inoperable in a very short time. In addition, there is a risk that components of the furniture will be damaged.

Aus der DE 19921344 A1 ist ein Antrieb für Verstelleinrichtungen, insbesondere an Tischen oder Sitz- oder Liegemöbeln bekannt, der mit wenigstens einem Elektromotor, mit wenigstens einer Schaltung zur An- und/oder Umsteuerung des Elektromotors und mit wenigstens einem Stelltrieb ausgestatted ist, und der über wenigstens ein Stellelement auf eine Verstelleinrichtung des Möbels einwirkt. und weleher in wenigstens eine vorgeschene Endlage verfahrbar ist, wobei die Schaltung wenigstens einen Endschalter umfasst, der bei Erreichen der Endlage des Stelltriebes eine Abschaltung oder eine Umschaltung des Motors bewirkt. Dieser Antrieb umfasst einen Gleichstrommotor, ein mit diesem fest verbundenes Reduktionsgetriebe sowie eine über das Getriebe angetriebene Gewindespindel mit einer auf dieser unverdrehbar gelagerten Schubmutter als Stellelement. Die beiden Endstellungen der Schubmutter werden durch Endschalter begrenzt, auf die die Schubmutter aufläuft. Die Antriebsteile dieses Antriebes sind in einem Gehäuse ungeordnet. Die Endschalter liegen innerhalb des Gehäuses und dieser Antrieb ist ein Einzelantrieb. mit dem nur ein einziges Möbelbauteil verstellt werden kann. Die Möglichkeit. dass gleichzeitig zu verstellende Bauteile kollidieren, ist bei diesem Antrieb nicht gegeben, da er nur ein ein- und ausfahrbares Bauteil, nämlich das auf die Schubmutter aufgesetzte Hubrohr beinhaltet.From the DE 19921344 A1 is a drive for adjusting, especially at tables or seating or reclining furniture known, which is equipped with at least one electric motor, with at least one circuit for starting and / or reversing the electric motor and at least one actuator, and the at least one adjusting element an adjustment of the furniture acts. and weleher in at least one pre-end position is movable, wherein the circuit comprises at least one limit switch, which causes a shutdown or switching of the motor upon reaching the end position of the actuator. This drive comprises a DC motor, a fixedly connected with this reduction gear and a driven via the gear screw with a non-rotatably mounted on this thrust nut as an actuator. The two end positions of the push nut are limited by limit switches on which the push nut runs. The drive parts of this drive are disordered in a housing. The limit switches are inside the housing and this drive is a single drive. with which only a single furniture component can be adjusted. The possibility. that simultaneously collide components to be adjusted, is not given in this drive, since it includes only one retractable and retractable component, namely the patch on the thrust nut lifting tube.

Aus der WO 03 088885 A1 wird ein optisches Kontrollsystem für die Verstellung eines Krankenhausbettes beschrieben. Dieses Kontrollsystem arbeitet drahtlos und besteht aus Sendern und Empfängern. Mit diesem Kontrollsystem soll die Höhe des zu verstellenden Matratzenrahmens ermittelt werden.From the WO 03 088885 A1 An optical control system for the adjustment of a hospital bed is described. This control system works wirelessly and consists of transmitters and receivers. With this control system, the height of the mattress frame to be adjusted is to be determined.

Der Erfindung liegt die Aufgabe zugrunde, ein Möbel der eingangs näher beschricbenen Art so zu gestalten, dass mit einfachsten Mitteln wirksam verhindert wird. dass es zu einer Kollision von Bauteilen während eines Verstellvorganges kommt.The invention has for its object to design a piece of furniture at the beginning beschricbenen type so that is effectively prevented by the simplest means. that a collision of components occurs during an adjustment process.

Die gestellte Aufgabe wird gelöst, indem im Bewegungsbereich jedes zu versteltenden Bauteiles wenigstens ein Kollisionsschalter derart angeordnet ist, das dieser vor einer Kollision von zwei oder mehr Bauteilen des Möbels betätigbar ist, sodass durch das ausgelöste Signal die jeweilige elektromotorische Antriebseinheit funkti-onsaustösend ansteuerbar ist, und dass die Ansteuerbarkeit der Antriebseinheit während der Dauer der Betätigung des Kollisionsschalters oder der Kollisionsschalter erfolgt, oder dass zur Verlängerung der Ansteuerbarkeit der Antriebseinbeit ein Zeitglied vorgeschen ist.The stated object is achieved by arranging at least one collision switch in the area of movement of each component to be treated such that it can be actuated before a collision of two or more components of the furniture, so that the respective electromotive drive unit can be actuated in an operable manner by the triggered signal. and that the driveability of the drive unit during the duration of the operation of the collision switch or the collision switch is carried out, or that a timer is proposed to extend the drivability of Antriebseinbeit.

Jeder Kollisionsschalter ist über Kabel elektrisch leitend mit der Steuereinheit verbunden. Sobald ein Kollisionsschalter betätigt wird, wird über die Steuereinheit ein Signal ausgelöst, wodurch zur Verlüngerung der Ansteuerbarkeit der Antriebseinheit (13,14) die Funktion der Antriebseinheit beendet oder geändert wird. Durch den Kollisionsschalter bzw, durch die Kollisionsschalter wird insbesondere jeder Antriebsmotor gegen Überlastung geschützt, der als das empfindlichste Bauteil der Verstelleinrichtung angeschen werden kann. Manche Möbel können auch derart komplex aufgebaut sein, dass eine Kabelverlegung sich als äußerst schwierig erweist. In solchen Fällen könnte die Signalübertragung zur Steuereinheit auch drahtlos über Funk- oder Infrarotsignale erfolgen.Each collision switch is electrically connected to the control unit via cables. As soon as a collision switch is actuated, a signal is triggered via the control unit, whereby the function of the drive unit is terminated or changed in order to extend the controllability of the drive unit (13, 14). In particular, each drive motor is protected against overloading by the collision switch or, by the collision switch, which can be used as the most sensitive component of the adjusting device. Some furniture can also be built so complex that a cable installation proves to be extremely difficult. In such cases, the signal transmission to the control unit could also be wireless via radio or infrared signals.

In weiterer Ausgestaltung ist vorgeschen, dass die jeweils zur Verhinderung einer Kollision zu steuernde elektromotorische Antriehseinheit durch das von dem Kollisionsschalter ausgelöste Signal umsteuerbar ist. Da im Normalfall die zu einer Kollision führende Bewegung von einer anderen Antriebseinheit abgeleitet wird, wird durch die Umsteuerung ein ausreichender Abstand geschaffen, damit bei der weiteren Bewegung des Bauteils die Kollision verhindert wird. Damit dieser Abstand ausreichend groß ist, bzw. dass ein Sicherheitsabstand erreicht wird, ist vorgesehen, dass nach dem Umsteuern der Antriebseinheit nach einer bestimmten Rück-laufzeit die dem auslösenden Kollisionsschalter zugeordnete Antriebseinheit stillsetzbar ist. Dadurch werden unnötige Bewegungen vermieden. Der Kollisionsschalter ist üblicherweise mit einem Stößel ausgerüstet, sodass die zugehörige Antriebseinheit eingeschaltet bleibt, solange der Stößel betätigt ist. Nach der Freigabe des Stößels könnte jedoch dieser sofort wieder betätigt werden, sodass es im Betriebszustand zu einer Vielzahl von Schaltspielen kommen würde. Dies soll jedoch vermieden werden, da dadurch die Lebensdauer des Schalters herabgesetzt wird. Es ist deshalb vorgesehen, dass die Rücklaufzeit der Antriebseinheit größer ist als die Schaltzeit des Kollisionsschalters. Als die Schaltzeit des Kollisionsschalters wird die Zeit angesehen wo durch Einfahren oder Betätigen des Stößels der Kollisionsschalter aktiviert ist.In a further embodiment, it is proposed that the respective electromotive drive unit to be controlled to prevent a collision be reversible by the signal triggered by the collision switch. Since normally the movement leading to a collision is derived from another drive unit, a sufficient distance is created by the reversal, so that the collision is prevented during the further movement of the component. For this distance is sufficiently large, or that a safety margin is achieved, it is provided that after the reversal of the drive unit after a certain return-time the drive unit associated with the triggering collision switch can be stopped. This avoids unnecessary movements. The collision switch is usually equipped with a plunger so that the associated drive unit remains switched on as long as the plunger is actuated. After the release of the plunger, however, this could be immediately operated again, so that it would come in the operating state to a variety of switching cycles. However, this should be avoided because it reduces the life of the switch. It is therefore provided that the return time of the drive unit is greater than the switching time of the collision switch. As the switching time of the collision switch, the time is considered where the collision switch is activated by retracting or pressing the plunger.

Um diese verlängerte Rücklaufzeit sicherzustellen, ist vorgesehen, dass sie durch ein elektrisches Zeitglied bestimmbar ist. Dieses elektrische Zeitglied besteht in einer bevorzugten Ausführung aus einem Transistor und einem Kondensator. Der Kondensator bewirkt, dass der zugeschaltete Transistor über eine bestimmte Zeit noch leitend bleibt. Alternativ könnte die Rücklaufzeit der Antriebseinheit durch ein mechanisches Zeitglied bestimmbar sein. Dieses Zeitglied könnte beispielsweise der Stößel sein, der gebremst nach der Freigabe durch das angefahrene Bauteil ausgefahren wird. Die Ausfahrzeit wird dadurch verlängert, sodass der Kollisionsschalter über die normale Schaltzeit hinaus aktiviert ist. Je nach Art des Möbels könnte jeder Kollisionsschalter an einem ortsfesten oder an einem beweglichen Bauteil des Möbels festgelegt sein.To ensure this extended return time, it is provided that it can be determined by an electrical timer. This electrical timer consists in a preferred embodiment of a transistor and a capacitor. The capacitor causes the switched transistor remains conductive for a certain time. Alternatively, the return time of the drive unit could be determined by a mechanical timer. This timer could be, for example, the plunger, which is braked extended after release by the driven component. The extension time is thereby extended so that the collision switch is activated beyond the normal switching time. Depending on the type of furniture, each collision switch could be fixed to a fixed or to a movable component of the furniture.

Es ist ferner vorgesehen, dass das elektrische Zeitglied im Gehäuse des Antriebsmotors, der Antriebseinheit oder zwischen der Steuereinheit und dem Antriebsmotor in einem separaten Gehäuse angeordnet ist. Die Verbindung zum Antriebsmotor und zu der Steuereinheit erfolgt dann über Kabel. Jede Antriebseinheit der Verstelleinrichtung kann entweder als Linearantrieb oder als Rotationsantrieb und auch in Form eines Einzel- oder Doppelantriebes ausgebildet sein. Sofern die Antriebseinheit als Doppelantrieb ausgebildet ist könnte sogar eine Antriebseinheit als Linearantrieb und die andere Antriebseinheit als Rotationsantrieb ausgebildet sein.It is further provided that the electrical timer in the housing of the drive motor, the drive unit or between the control unit and the drive motor is arranged in a separate housing. The connection to the drive motor and to the control unit then takes place via cable. Each drive unit of the adjusting device can be designed either as a linear drive or as a rotary drive and also in the form of a single or double drive. If the drive unit is designed as a double drive could even be a drive unit designed as a linear drive and the other drive unit as a rotary drive.

Die Steuereinheit des Möbelantriebes muss so ausgelegt sein, dass jeder Kollisionsschalter seine Funktion voll erfüllen kann. Wird zur Verhinderung der Kollision einer der Kollisionsschalter betätigt bzw. aktiviert, wird in der Steuereinheit ein Umsteuerbaustein aktiviert, sodass die Antriebseinheit umgeschaltet wird, wenn einer oder mehrere Kollisionsschalter betätigt werden. In einfachster Weise besteht der Umsteuerbaustein aus zwei Relais, die so miteinander verknüpft sind, dass beim Betätigen von mindestens einem Kollisionsschalter zur Umsteuerung der Antriebseinheit beide Relais anziehbar sind. Dabei wird das erste Relais durch einen selbsthaltenden Schalter angesprochen, während das zweite Relais durch ein Zeitglied angesteuert wird. Beide Relais sind nun geschaltet. Die Antriebseinheit wird nun so lange in Ihrer Verfahrrichtung umgesteuert, wie das Zeitglied aktiv ist. Danach wird die Antriebseinheit stillgesetzt und bleibt so lange in diesem Zustand, bis das entweder der Kollisionsschalter erneut betätigt wird oder die Spannungszufuhr unterbrochen wird. Dabei fällt auch die Selbsthaltung des ersten Relais zusammen.The control unit of the furniture drive must be designed so that each collision switch can fully fulfill its function. If one of the collision switches is actuated or activated to prevent the collision, a changeover module is activated in the control unit so that the drive unit is switched over when one or more collision switches are actuated. In the simplest way, the Umsteuerbaustein consists of two relays, which are linked together so that when pressing at least one collision switch for reversing the drive unit, both relays are attracted. The first relay is addressed by a self-holding switch, while the second relay is controlled by a timer. Both relays are now switched. The drive unit is now reversed in its travel direction as long as the timer is active. Thereafter, the drive unit is stopped and remains in this state until either the collision switch is pressed again or the power supply is interrupted. This also coincides the latching of the first relay.

Durch diese Schaltungsanordnung wird die Schalhäufigkeit im Kollisionsfall herabgesetzt, wodurch der Verschleiß der Steuerung und der Antriebseinheiten herabgesetzt wird. Die Schaltfrequenz ist derart vermindert, dass das Möbel nicht in Resonanzartige Schwingungen versetzt wird, wodurch die Lebensdauer der mechanischen Verstellbauteile des Möbels erhöht wird.By this circuit arrangement, the switching frequency is reduced in the event of a collision, whereby the wear of the controller and the drive units is reduced. The switching frequency is reduced such that the furniture is not put into resonance-like vibrations, whereby the life of the mechanical adjustment components of the furniture is increased.

Bei den Kollisionsschaltern können je nach Anforderungsbereich unterschiedliche Bauformen in Frage kommen. Eine einfache Bauform wäre beispielsweise ein in einem eigenen Gehäuse untergebrachter Schalter mit einem schaltenden Kontakt und eine Betätigung dieses Kontaktes durch einen Stößel, der wiederum unmittelbar von dem Möbel getätigt wird.Depending on the requirement area, different designs can be considered for the collision switches. A simple design would be, for example, housed in a separate housing switch with a switching contact and an actuation of this contact by a plunger, which in turn is made directly from the furniture.

Andere Bauformen eines Kollisionsschalters könnten mit einer nach Art eines Zugseiles oder eines Schaltgestänges gekoppelt sein. Dabei kann der Betätigungsstößel mit dem Schaltgestänge gekoppelt sein, sodass ein Schaltvorgang durch Betätigung des Schaltgestänges ausgelöst wird.Other designs of a collision switch could be coupled to a type of pull rope or a shift linkage. In this case, the actuating tappet may be coupled to the shift linkage, so that a switching operation is triggered by actuation of the shift linkage.

Eine andere Bauform weist ein seil- oder schnurförmiges Betätigungselement auf, das in Wirkverbindung mit dem Stößel des Kollisionsschalters steht. Wird dieses Betätigungselement aus seiner Ruhelage in eine andere Lage versetzt, wird der Stößel des Kollisionsschalters betätigt, der den Schaltkontakt schaltet.Another design has a rope or cord-shaped actuator, which is in operative connection with the plunger of the collision switch. will this Actuator displaced from its rest position to another position, the plunger of the collision switch is actuated, which switches the switching contact.

Auch solche Bauformen eines Kontrollschalters, die nach dem Prinzip der berührungslosen Näherungserkennung beispielsweise durch Lichtschranken oder Reflexionen arbeiten, sind denkbar.Even those types of control switch that operate on the principle of non-contact proximity detection, for example, by light barriers or reflections are conceivable.

Anhand der beiliegenden Zeichnungen wird die Erfindung noch näher erläutert. Es zeigen:

Figur 1
ein mit einem verstellbaren Matratzenrahmen ausgerüstetes Bett mit mehreren Antrieben;
Figur 2
das Bett nach der Figur 1 mit ausgefahrenem Matratzenrahmen;
Figur 3
das Bett nach den Figuren 1 und 2 mit schräg gestelltem Matratzenrahmen;
Figur 4
ein Blockschaltbild der Kollisionssteuereinrichtung und des Handschalters, und
Figur 5
eine mögliche Ausführung eines Kollisionsschaltplanes zur Steuerung der Antriebe.
Reference to the accompanying drawings, the invention will be explained in more detail. Show it:
FIG. 1
a bed with multiple drives equipped with an adjustable mattress frame;
FIG. 2
the bed after the FIG. 1 with extended mattress frame;
FIG. 3
the bed after the Figures 1 and 2 with sloping mattress frame;
FIG. 4
a block diagram of the collision control device and the manual switch, and
FIG. 5
a possible execution of a collision diagram for controlling the drives.

Aus Gründen der vereinfachten Darstellung ist in den Figuren 1 bis 3 das Bett 10 nur rein schematisch dargestellt. Das Bett 10 ist mit Rädern ausgestattet, da es unter anderem auch im Krankenhaus oder in einem Pflegeheim verwendet werden kann. Das Bett 10 enthält einen Grundrahmen 11 und einen gegenüber diesem Grundrahmen 11 verstellbaren Matratzenrahmen 12. Der Matratzenrahmen 12 wird durch vier in den Endbereichen angeordnete Antriebseinheiten 13, 14 verstellt, die paarweise in den Endbereichen angeordnet sind. Die Antriebseinheiten 13, 14 sind allgemein bekannt. Im dargestellten Ausführungsbeispiel sind sie als Linearantriebe in Form von Einzelantrieben ausgebildet. An dem Grundrahmen 11 sind vier Laufräder 15 angeordnet. Die Antriebseinheiten 13, 14 können mit Ihren Abtriebsgliedern, beispielsweise den Hubrohren direkt mit dem Matratzenrahmen 12 gekoppelt werden. Üblicherweise wird jedoch die Verstelleinheit aus den Antriebseinheiten 13 oder 14 und einem Beschlag gebildet. In den Endbereichen sind an dem Grundrahmen 11 an der dem Matratzenrahmen 12 zugewandten Seite Kollisionsschalter 16, 17 montiert. Diese Kollisionsschalter können normale Endschalter sein, deren Stößel ein- und ausfahrbar sind. Im dargestellten Ausführungsbeispiel liegen die Stößel dem Matratzenrahmen 12 zugewandt.For the sake of simplified illustration is in the FIGS. 1 to 3 the bed 10 only shown purely schematically. The bed 10 is equipped with wheels, as it can be used, among other things, in the hospital or nursing home. The bed 10 includes a base frame 11 and a mattress frame 12 which is adjustable relative to this base frame 11. The mattress frame 12 is adjusted by four drive units 13, 14 arranged in the end regions, which are arranged in pairs in the end regions. The drive units 13, 14 are well known. In the illustrated embodiment, they are designed as linear drives in the form of individual drives. On the base frame 11 four wheels 15 are arranged. The drive units 13, 14 can with their output members, For example, the Hubrohren be coupled directly to the mattress frame 12. Usually, however, the adjustment is formed from the drive units 13 or 14 and a fitting. In the end regions, collision switches 16, 17 are mounted on the base frame 11 on the side facing the mattress frame 12. These collision switches can be normal limit switches whose plungers can be moved in and out. In the illustrated embodiment, the plunger are facing the mattress frame 12.

Wird der Matratzenrahmen 12 gegenüber dem Grundrahmen 11 in einer parallelen Stellung verbleibend verstellt, werden die Kollisionsschalter 16, 17 funktionslos gehalten. Wird jedoch entsprechend der Figur 3 der Matratzenrahmen 12 an einem Ende angehoben, wird er an dem gegenüberliegenden Ende entsprechend der Anbindung der Antriebseinheiten 13 abgesenkt, sodass in einer bestimmten Schrägstellung der Matratzenrahmen 12 mit dem Grundrahmen 11 kollidiert. In diesem Fall wird der in der Darstellung rechte Kollisionsschalter 16 betätigt, d.h. der Stößel wird eingefahren. Es können auch an jedem Ende mehrere Kollisionsschalter montiert sein. Durch den Kollisionsschalter 16 wird ein Signal ausgelöst, welches in die Steuereinheit eingespeist wird, wodurch die Antriebseinheit 13 umgesteuert wird, wie noch näher erläutert wird. Wie noch ebenfalls näher erläutert wird, wird nach der Umsteuerung die Antriebseinheit 13 solange eingeschaltet, auch nachdem der Matratzenrahmen von dem Stößel des Kollisionsschalters 16 wieder weg gefahren ist.If the mattress frame 12 is displaced relative to the base frame 11 in a parallel position, the collision switches 16, 17 are kept inoperative. However, according to the FIG. 3 the mattress frame 12 is raised at one end, it is lowered at the opposite end corresponding to the connection of the drive units 13, so that in a certain inclined position of the mattress frame 12 collides with the base frame 11. In this case, the right collision switch 16 in the illustration is actuated, ie the plunger is retracted. It can also be mounted on each end several collision switches. By the collision switch 16, a signal is triggered, which is fed to the control unit, whereby the drive unit 13 is reversed, as will be explained in more detail. As will also be explained in more detail, the drive unit 13 is turned on after the reversal, even after the mattress frame is moved away from the plunger of the collision switch 16 again.

Die Figur 4 zeigt ein Blockschaltbild für die Steuerung der Antriebseinheiten 13, 14. Die Funktionen des Bettes 10 werden durch einen Handschalter 18 oder eine Handbedienvorrichtung ausgelöst. Der Handschalter 18 ist mit mehreren Betätigungselementen in Form von Drucktastern 18a ausgestattet. Der Handschalter 18 ist durch ein Kabel mit der Steuereinheit 19 verbunden, in deren Gehäuse auch die Stromversorgung installiert sein kann. Diese könnte jedoch auch an einer anderen Stelle angeordnet werden. Die Steuerung 19 kann einen Steuerkreis und einen Lastkreis beinhalten und mehrere Antriebseinheiten 13, 14 ansteuern. Sie kann jedoch auch aus einer Energieversorgung und einem Verteilerbaustein bestehen, sodass die Drucktaster 18a des Handschalters 18 selbst die Last schalten. Die Kollisionssteuerung (23) enthält außerdem einen Umsteuerbaustein 20, der als elektrische Lösung angesehen werden kann, um die jeweilige Antriebseinheit 13 oder 14 vor einer Kollision umzusteuern. Dazu wird von dem jeweiligen Kollisionsschalter 16 oder 17 ein Signal in die Kollisionssteuerung (23) eingespeist. Dadurch wird die jeweilige Antriebseinheit 13 oder 14 umgesteuert. Damit die Antriebseinheit 13 oder 14 auch nach der Freigabe des Stößels des jeweiligen Kollisionsschalters 16, 17 noch weiterläuft, ist entweder in der Kollisionssteuerung (23) ein elektrisches Zeitglied 21 installiert oder der Kollisionsschalter 16 oder 17 ist mit einem mechanischen Zeitglied 22 ausgestattet. Dieses mechanische Zeitglied 22 könnte eine Bremse oder ein Dämpfer sein, der bewirkt, dass der Stößel des Kollisionsschalters 16 oder 17 verzögert ausgefahren wird. Nach einer vorgegebenen Zeit nach der Umsteuerung der jeweiligen Antriebseinheit 13 oder 14 wird die jeweilige Antriebseinheit 13 oder 14 stillgesetzt.The FIG. 4 shows a block diagram for the control of the drive units 13, 14. The functions of the bed 10 are triggered by a manual switch 18 or a manual control device. The manual switch 18 is equipped with a plurality of actuators in the form of push buttons 18a. The manual switch 18 is connected by a cable to the control unit 19, in whose housing the power supply can be installed. However, this could also be placed elsewhere. The controller 19 may include a control circuit and a load circuit and drive a plurality of drive units 13, 14. However, it can also consist of a power supply and a distribution block, so that the push buttons 18a of the manual switch 18 itself switch the load. The collision control (23) also includes a Umsteuerbaustein 20, which as electrical Solution can be viewed to redirect the respective drive unit 13 or 14 from a collision. For this purpose, a signal in the collision control (23) is fed from the respective collision switch 16 or 17. As a result, the respective drive unit 13 or 14 is reversed. So that the drive unit 13 or 14 continues to run even after the release of the plunger of the respective collision switch 16, 17, either an electric timer 21 is installed in the collision control (23) or the collision switch 16 or 17 is equipped with a mechanical timer 22. This mechanical timer 22 could be a brake or a damper that causes the plunger of the collision switch 16 or 17 to be extended with a delay. After a predetermined time after the reversal of the respective drive unit 13 or 14, the respective drive unit 13 or 14 is stopped.

Gemäß der Figur 4 kann die Kollisionssteuerung 23 in der Energieversorgungsleitung der Antriebseinheit 13, 14 angeordnet sein. Eine vorteilhafte Weitergestaltung lässt zu, dass die Kollisionssteuerung 23 in der Antriebseinheit 13, 14 integriert ist. Dies wird symbolisch durch ein gemeinsames Gehäuse 24 verdeutlicht. Der Vorteil liegt darin, dass keine Umbauarbeiten an der Steuerung 19 erforderlich sind und rein individuell eine Antriebseinheit 13, 14 mit oder ohne Kollisionssteuerung 23 in das Möbel eingebaut werden kann.According to the FIG. 4 For example, the collision control 23 may be arranged in the power supply line of the drive unit 13, 14. An advantageous further development allows the collision control 23 to be integrated in the drive unit 13, 14. This is symbolically illustrated by a common housing 24. The advantage is that no modifications to the controller 19 are required and purely individually, a drive unit 13, 14 can be installed with or without collision control 23 in the furniture.

Die Figur 5 zeigt eine mögliche Ausführungsform eines Schaltplanes. Danach besteht das elektrische Zeitglied aus dem Kondensator C3 und dem Widerstand R3. Dem Relais K2 ist ein Thyristor TH1 und dem Relais K1 ein Transistor T1 zugeschaltet. Die Relais K1 und K2 sind Wechselkontakt-Relais. Wird einer der Kollisionsschalter 16, 17 betätigt, wird ein Stromkreis geschlossen. In diesem Falle wird der Thyristor TH1 und der Transistor T1 leitend, wodurch die jeweilige Antriebseinheit 13, 14 umgesteuert wird. Sobald der Stößel des jeweiligen Kollisionsschalters 16, 17 freigegeben wird, wird bei der Lösung mit dem selbsthaltenden Schalter (Thyristor TH1) das Relais K2 auch weiterhin geschaltet bzw. angezogen. Der Thyristor TH1 bildet den selbsthaltenden Schalter Auch das Relais K1 bleibt noch eine gewisse Zeit angezogen bzw. geschaltet, weil der Transistor T1 durch den Kondensator C3 leitend bleibt. Somit ändert sich die Polarität zur Antriebseinheit 13, 14 sodass die Antriebseinheit 13, 14 nun in die entgegengesetzte Richtung verfährt und zwar so lange, wie das Zeitglied bestehend aus dem Kondensator C3 und dem Widerstand R3 mit dem Transistor T1 das Relais K1 schaltet. Die Antriebseinheit 13, 14 ist nun stillgesetzt, indem die Stromzufuhr zu dem Elektromotor der Antriebseinheit 13, 14 getrennt ist.The FIG. 5 shows a possible embodiment of a circuit diagram. Thereafter, the electrical timer consists of the capacitor C3 and the resistor R3. The relay K2 is a thyristor TH1 and the relay K1 a transistor T1 is switched on. Relays K1 and K2 are changeover contact relays. If one of the collision switches 16, 17 is actuated, a circuit is closed. In this case, the thyristor TH1 and the transistor T1 is conductive, whereby the respective drive unit 13, 14 is reversed. As soon as the plunger of the respective collision switch 16, 17 is released, in the solution with the self-holding switch (thyristor TH1), the relay K2 continues to be switched or energized. The thyristor TH1 forms the self-holding switch Also, the relay K1 remains energized or switched for a certain time, because the transistor T1 remains conductive through the capacitor C3. Thus, the polarity to the drive unit 13, 14 so that the drive unit 13, 14 now moves in the opposite direction and as long as the timer consisting of the capacitor C3 and the resistor R3 to the transistor T1, the relay K1 switches. The drive unit 13, 14 is now stopped by the power supply to the electric motor of the drive unit 13, 14 is disconnected.

Der Elektromotor ist vorzugsweise ein permanent erregter Gleichstrommotor, der nach Trennung der Energiezufuhr kurzgeschlossen werden kann, wie es die Kontakte der Relais K1 und K2 in der Figur 5 verdeutlichen. Dies führt zu einer raschen Abbremsung des Rotors des Elektromotors.The electric motor is preferably a permanently excited DC motor, which can be short-circuited after disconnecting the power supply, as the contacts of the relays K1 and K2 in the FIG. 5 clarify. This leads to a rapid deceleration of the rotor of the electric motor.

Der Thyristor TH1 ist weiterhin als selbsthaltender Schalter aktiv, sodass ein erneutes Anfahren der Antriebseinheit 13, 14 erst dann erfolgt, wenn der Kollisionsschalter 16, 17 erneut betätigt oder die Schaltung für einen Moment spannungsfrei geschaltet wird. Bei der Ausführung mit dem mechanischen Zeitglied kann selbstverständlich der Kondensator C3 entfallen. Dem Thyristor TH1 sind noch zwei weitere Widerstände R1 und R2 sowie ein weiterer Kondensator C2 zugeschaltet.
Die Erfindung ist nicht auf die dargestellten Ausführungsbeispiele beschränkt. Wesentlich ist, dass im Bewegungsbereich jedes zu verstellenden Bauteiles mindestens ein Kollisionsschalter angeordnet ist, der bewirkt, dass vor einer Kollision von zwei aufeinander zu bewegbaren Bauteilen eine Umsteuerung der Antriebseinheit 13, 14 erfolgt. Jeder Kollisionsschalter könnte demzufolge auch als ein Kollisionsverhinderungsschalter bezeichnet werden. Ferner ist wesentlich, dass Schaltspiele für jeden Kollisionsschalter 16, 17 vermieden werden, indem in der Steuerung ein elektrisches Zeitglied installiert ist oder indem eine mechanische Lösung für den Kollisionsschalter 16, 17 gefunden wird, indem beispielsweise der Stößel gebremst oder gedämpft ausfährt, wenn eine Freigabe durch das ihn betätigende Bauteil erfolgt ist.
The thyristor TH1 continues to be active as a self-holding switch, so that a renewed startup of the drive unit 13, 14 takes place only when the collision switch 16, 17 is operated again or the circuit is de-energized for a moment. In the embodiment with the mechanical timer of course, the capacitor C3 can be omitted. The thyristor TH1 are two more resistors R1 and R2 and a further capacitor C2 connected.
The invention is not limited to the illustrated embodiments. It is essential that at least one collision switch is arranged in the movement region of each component to be adjusted, which causes a reversal of the drive unit 13, 14 takes place before a collision of two mutually movable components. Each collision switch could therefore also be referred to as a collision avoidance switch. Furthermore, it is essential that switching operations for each collision switch 16, 17 be avoided by an electrical timer is installed in the control or by a mechanical solution for the collision switch 16, 17 is found, for example, by the ram braked or attenuated when a release done by him actuated component.

Claims (20)

  1. Item of furniture (10) having a component which can be adjusted or having a plurality of components which can be adjusted and which can be moved by at least one adjusting device, and in which each adjusting device contains an electromotive drive unit (13, 14) and a fitting or a lever arrangement, the input member of the said fitting being coupled to the output member of the electromotive drive unit (13, 14) and the output member of the said fitting being coupled, directly or by means of connecting elements, to the component which can be adjusted, it being possible to actuate each electromotive drive unit by means of a control unit (19) or a manual switch (18), and at least one collision switch (16, 17) being arranged in the movement region of each component (12), which can be adjusted, of the item of furniture (10) in such a way that the said collision switch can be operated in order to prevent a collision between two components or a plurality of components, so that the respective electromotive drive unit (13, 14) can be actuated so as to trigger a function by the triggered signal, characterized in that the drive unit (13, 14) can be actuated for the purpose of terminating or changing the function during operation of the collision switch or the collision switches (16, 17), and in that a timer (21, 22) is provided for extending the ability to actuate the drive unit (13, 14).
  2. Item of furniture according to Claim 1, characterized in that the electromotive drive unit (13, 14) which can be actuated in each case to prevent a collision can be reversed by the signal which is triggered by the collision switch (16, 17).
  3. Item of furniture according to Claim 2, characterized in that, after the drive unit (13, 14) is reversed after a specific return time of the drive unit (13, 14), the drive unit which is reversed by the triggering collision switch (16, 17) can be stopped.
  4. Item of furniture according to Claim 3, characterized in that the return time of the respective drive unit (13, 14) is longer than the operating time of the respective collision switch (16, 17).
  5. Item of furniture according to Claim 4, characterized in that the return time of the respective drive unit (13, 14) can be determined by the timer which is designed as a controlling electrical timer (21).
  6. Item of furniture according to Claim 5, characterized in that the electrical timer (21) is formed from a transistor (TH1) and a capacitor (C3) with a resistor (R3).
  7. Item of furniture according to Claim 4, characterized in that the return time of the respective drive unit (13, 14) can be determined by the timer which is designed as a mechanical timer (22), for example by braked extension of the tappet of the respective collision switch (16, 17).
  8. Item of furniture according to one or more of the preceding Claims 1 to 7, characterized in that each collision switch (16, 17) is fixed to a stationary or to a moving component of the item of furniture (10).
  9. Item of furniture according to Claim 5, characterized in that the electrical timer (21) is arranged in the housing of the drive motor of the respective drive unit (13, 14) or in a separate housing between the control unit (19) and the drive motor.
  10. Item of furniture according to one or more of the preceding Claims 1 to 9, characterized in that at least one drive unit (13, 14) is designed as a linear drive, as a rotary drive or as a pivotable drive in the form of a single or dual drive.
  11. Item of furniture according to one or more of the preceding Claims 1 to 9, characterized in that at least one drive unit (13, 14) is in the form of a dual drive, and in that one drive train is designed as a linear drive and the other drive train is designed as a rotary drive.
  12. Item of furniture according to one or more of the preceding Claims 1 to 11, characterized in that the collision control system contains a reversing module (20).
  13. Item of furniture according to Claim 12, characterized in that the reversing module (20) contains two relays (K1, K2) in such a way that both relays (K1, K2) can be operated when a collision switch (16, 17) is operated for the purpose of reversing the respective drive unit (13, 14).
  14. Item of furniture according to Claim 13, characterized in that one relay (K2) can be actuated by a self-holding switch and the other relay (K1) can be actuated by a timer (C3, R3).
  15. Item of furniture according to one or more of the preceding Claims 1 to 14, characterized in that each collision switch (16, 17) is designed as a switch which is accommodated in a housing and has a switching contact, and in that the switching contact can be operated by a tappet by means of the item of furniture or the fitting of an item of furniture.
  16. Item of furniture according to one or more of the preceding Claims 1 to 14, characterized in that each collision switch (16, 17) is coupled to a flexible pulling means, for example a pull cable or a switching rod, and in that the tappet is coupled to the switching rod so that a switching process can be triggered by operating the switching rod.
  17. Item of furniture according to one or more of the preceding Claims 1 to 14, characterized in that each collision switch (16, 17) has a cable- or cord-like operating element which is operatively connected to the tappet of the collision switch (16, 17), so that the tappet of the collision switch (16, 17) can be operated by the cable- or cord-like operating element.
  18. Item of furniture according to one or more of the preceding Claims 1 to 14, characterized in that each collision switch (16, 17) is designed as a contactless switch which operates in accordance with the light barrier or reflection principle, for example.
  19. Item of furniture according to one or more of the preceding Claims 1 to 18, characterized in that the control system (19) of the item of furniture contains a control circuit and a load circuit, and in that a plurality of drive units (13, 14) can be actuated.
  20. Item of furniture according to one or more of the preceding Claims 1 to 18, characterized in that the control system (19) is formed from an energy supply system and from a distributor module, and in that the load can be automatically switched by the pushbuttons (18a) of the manual switch (18).
EP20040027360 2003-12-12 2004-11-18 Furniture Not-in-force EP1541061B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20319312U 2003-12-12
DE20319312U DE20319312U1 (en) 2003-12-12 2003-12-12 Furniture

Publications (2)

Publication Number Publication Date
EP1541061A1 EP1541061A1 (en) 2005-06-15
EP1541061B1 true EP1541061B1 (en) 2012-06-20

Family

ID=34485641

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040027360 Not-in-force EP1541061B1 (en) 2003-12-12 2004-11-18 Furniture

Country Status (2)

Country Link
EP (1) EP1541061B1 (en)
DE (1) DE20319312U1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202009005020U1 (en) * 2009-07-14 2010-12-16 Dewert Antriebs- Und Systemtechnik Gmbh First-fail-safe electromotive furniture drive

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2343371B (en) * 1998-11-03 2000-09-27 Ulland Islwyn Watkins Control of powered furniture
DE19921344A1 (en) 1999-05-10 2000-11-16 Okin Ges Fuer Antriebstechnik Drive for adjustment device e.g. on reclining furniture, has circuit containing switch that causes short circuit of motor circuit when activated by control drive reaches end position
DE60326558D1 (en) 2002-04-19 2009-04-23 Hill Rom Services Inc DEVICE FOR HOSPITAL BEDS FOR THE PERCEPTION OF OBSTACLES

Also Published As

Publication number Publication date
EP1541061A1 (en) 2005-06-15
DE20319312U1 (en) 2005-05-04

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