DE112013001255B4 - Operating unit of an electromotive furniture drive - Google Patents

Abstract

An operating unit (10) of an electromotive furniture drive (100) with a supply device (9) and at least one adjusting drive (7, 8), has a housing, operating elements for operating the at least one adjusting drive (7, 8) to be associated with the electromotive furniture drive (100) , and a control line (18), wherein the control elements have changeover contacts, which are designed for direct switching of a motor current of the assigned at least one adjusting drive. The operating unit (10) has an enabling switching device with a release switching element, which for switching over an operating state of the operating unit (10) from an operating state "off", in which previously determinable operating elements are without function on actuation, in an operating state "operation", in which the previously determinable operating elements upon actuation cause operation of the at least one adjustment drive (7, 8) to be assigned is formed. An electromotive furniture drive (100) and a piece of furniture.

Description

The invention relates to an operating unit of an electromotive furniture drive.

Such control units for controlling and operating electromotive adjusting drives of a piece of furniture usually have a switch in the manner of a main switch. When the main switch is triggered or actuated, the operating states of the operating unit or a control unit connected to the operating unit are switched over. In the operating state of operation, a process of the respective electromotive adjusting drive is carried out by actuating a switch or a button of the operating unit. In the operating state Off, no procedure of the respective electric motor adjustment takes place.

An electromotive furniture drive comprises at least one electric motor, which is often designed as a brushed DC motor. The engine is followed by a transmission, usually a DC gear motor is used. Furthermore, the electromotive furniture drive comprises an operating unit and a supply device. The control unit may be designed wired or wireless and has a number of pushbuttons, when actuated via the signal transmission, a control signal for electrical control of the respective motor in the respective direction of rotation.

Furniture, with several support surfaces for supporting a person in the furniture are z. B. as beds, sofas, armchairs u. Like. Widely used and known. They have at least one movable support surface, which is mounted movably relative to at least one further support surface. The movable support surface is z. B. a back part and / or a leg part which is adjustable with at least one electromotive furniture drive. For this purpose, the movable support surface can be pivoted, displaceable or both by means of a suitable fitting. It is also possible that a primitive, z. As a bed frame, height adjustable with one or more furniture drives is running.

There are furniture with a trained as a hand control unit known, with a control unit is provided with relay switches. Upon actuation of a button of the operating unit, a control circuit is first closed, which then switches a relay switch, which then closes the load circuit for the respective electric motor. In this case, the operating unit has a button for switching on the system, wherein the operating state is given operation. The operating state of operation here controls the control unit.

The arrangements in the prior art have an increased assembly costs, since a control unit is provided, which also has to be mounted in the furniture.

Furthermore, the relevant drive systems for seating and / or reclining furniture are mass-produced articles, whereby the demand for inexpensive solutions exists and whereby an easily mountable arrangement is created without significant additional effort to change the operating state for the operation of electromotive adjusting drives of a piece of furniture.

In the course of the mass-produced articles, control units without relay switches have been proposed, in which the motor current of the adjusting drives flows through the keys of the operating unit, which are specially designed for such a high current.

The document DE 10 2007 054 422 A1 describes a method for generating first-fail-safe and fault-proof control signals of at least one control unit of a motorized electric motor drive with a control device and a safety device comprising the steps of monitoring and processing output signals of the control unit by means of a central processing unit and generating first-failsafe and fault-proof control signals from the processed output signals by means of the central unit, wherein the monitoring and processing of the input signals takes place in parallel by at least two programmable controller devices which monitor each other. A corresponding safety device and a control arrangement will be described. The method and the device are used in the medical and nursing sector and must therefore comply with the relevant safety regulations and be first-fail-safe.

WO 2005/025 024 A2 relates to an arrangement for operating an electrically adjustable seat and / or deck furniture. The arrangement meets higher safety standards and is easy to use. It comprises a device for supply current isolation of control devices, which are connected to a first network-connected voltage source for providing an operating potential for a servomotor, and having a first relay, which primary or secondary side is arranged to a transformer in the non-energized state in a Off position and with an auxiliary voltage source, which is connectable to the control input of the first relay. A switching means with two independent switching contacts for the simultaneous triggering of two switching operations is provided, wherein the switching contacts by one or two Tastschalter are actuated, and the first switching contact for connecting the auxiliary voltage source to the control input of the first relay and the second switching contact for applying the operating potential to the servomotor are triggered.

In the document DE 20 2010 005 410 U1 an electromotive furniture drive with a power supply device, a mains isolation device and a hand control for adjusting movable furniture components is described relative to each other, wherein the electromotive furniture drive has at least one direction reversible electric motor, each electric motor is followed by a Drehzahlreduziergetriebe and wherein each Drehzahlreduziergetriebe another gear is connected downstream, and wherein the energy supply device has a network connection, which is connectable to the network by the mains isolation device, wherein the power supply device transforms the line side input voltage into an output side low voltage, and an isolation transformer or a transmission unit for galvanic isolation between the network input side and the low voltage output side for operating the electromotive furniture drive up eist, wherein the power supply device is designed in the manner of a switched-mode power supply and has an intermediate circuit, a control device for controlling the switched-mode power supply, and the control device is assigned a network-connected control supply, wherein the energy supply device has an operating state Off when disconnected from the mains and an operating state in normal operation wherein the mains isolation device comprises an auxiliary voltage source, a network relay having at least one relay contact, at least one switching element which is connected in series with the at least one relay contact, and a control block for controlling the at least one switching element.

The DE 10 2005 063 321 A relates to a hand control for adjusting drives for adjusting furniture components, the selection keys, function keys, directional buttons and a locking device for blocking certain operating functions contains and is designed first-fail-safe. The power supply of a control block is ensured by at least one energy storage in a predetermined time interval, after a selection key, a function key or a direction key after actuation is again unactuated. Within the predeterminable time interval after actuation of a selection key or a function key, these keys actuate selected outputs of the control block upon actuation of a direction key with a control voltage for actuating a specific drive motor. The hand control is particularly suitable for furniture in nursing homes and in the hospital area with increased safety requirements.

The document DE 10 2006 033 712 A1 describes a control for electrically adjustable furniture. The controller includes a mains voltage range and a low voltage range, which are galvanically isolated. A rectifying supply device, which is arranged in the mains voltage range, serves to generate a voltage applied to supply rectified rectified voltage from an AC line voltage. At a first motor terminal arranged in the mains voltage range, the rectified voltage applied to the supply terminals can be output as a function of a first control signal. The controller further comprises a first control device, which is arranged in the mains voltage range, and has an operating terminal and a first control output for outputting the first control signal. An operating device arranged in the low voltage range is arranged on the operating connection via a galvanically separating coupling.

The object of the present invention is to provide an improved operating unit.

The object is achieved by an operating unit with the features of claim 1.

An operating unit is provided, which is provided with a release switching device for switching over operating states of the operating unit.

An operating unit according to the invention of an electromotive furniture drive with a supply device and at least one adjusting drive has a housing, control elements for operating the attributable at least one adjustment of the electromotive furniture drive, and a control line, wherein the control elements have Umschaltkontakte, which for direct switching of a motor current to be assigned at least one Adjusting drive are formed. The operating unit has a release switching device with a release switching element which, for switching over an operating state of the operating unit from an operating state "off", in which previously determinable operating elements have no function when actuated, into an operating state "operating" in which the previously definable operating elements are actuated cause operation of the assigned at least one adjusting drive, is formed.

In this case, the so-trained wired control unit can be designed to be pluggable, there are no separate accessories required.

Another advantage is that previously operating elements can be specified, which can be acted upon with this operating state switching. So functions that always have to be present can be separated. This can be, for example, functions that are not electromotive adjustment functions and thus switch, for example, light or lighting. In rare cases and special variants of a piece of furniture, however, it can also be certain electromotive adjustment functions, which must always be operable.

In one embodiment, the release switching device has the release switching element with an actuating button and at least one switching contact, a power switching unit with at least one power switching contact in at least one supply line of the operating elements, and a control block for controlling the power switching unit. Upon actuation of the enabling switching element, the power switching unit is turned on and off by the control block. The power switching contact may be arranged in one or as a double contact in both supply lines.

It is envisaged that the release switching element is designed as a button. This can be a common, simple contact element, for. As a closer, are used.

In one embodiment, the control block has a turn-off delay with a pre-definable time period as a time delay. When the release switch element is released, the control block switches off the power switch element with a delay. It is irrelevant how long the release switch element and / or a control element are actuated. This allows a security function. The pre-definable period of time may, for. B. be 30 s. It is also possible that after a last operation of a control element of the control block after a pre-definable period of time, for. B. 10 s, the power switching element turns off.

In a further embodiment, the switch-off delay of the control block can be designed so that it is activated upon actuation of the release switch element. This makes a simple operation possible.

In yet another embodiment, the turn-off delay of the control block may be configured to be independent of an actuation of a control element. This means that the switch-off delay is activated by the enable switch element when switching to the operating state "Operation" and is automatically executed without any further influence.

In an alternative embodiment, it is provided that the switch-off delay of the control block is designed so that it can be reset in the operating state "off" by an operation of a control element independently and in the operating state "operation" upon actuation of a control element. In this case, the switch-off delay is reset to its original position and the delay time begins to run again in a first variant. This is advantageous if after switching on the release switching device several adjustment operations are to be made and the delay time is not sufficient. A reset takes place in this first variant but only at the beginning of pressing, with a longer press of the relevant operating element (eg., Even with terminals of the control element) is no reset, the delay time is then uninfluenced. This ensures automatic switching to the "off" operating state.

In another variant, the delay time begins again to run again when the operation of the relevant control element is completed.

In one embodiment, the power switching unit is a relay with the at least one power switching contact. Such a relay is inexpensive as an electromechanical switch and available in high quality. An alternative relay has a predetermined contact noise and is to be regarded as particularly advantageous because it audibly or alternatively haptically signals the user switching.

Alternatively, the power switching unit may be a semiconductor switch, which offers special space advantage within the operating unit.

It is also possible in yet another embodiment that the power switching unit comprises a relay with the at least one power switching contact and at least one semiconductor switch, which is connected in series with the power switching contact.

In an alternative embodiment, the release switching element may be formed with the switching contact as a moving switching element, vibration switching element, touch-sensitive switching element, or the like. This means that activating the control block the Release switching device when detecting the operation unit can be done by a user.

In yet another embodiment, the operating unit has at least one signaling element for displaying the operating state of the operating unit. This can be z. B. by different colors and / or blink the respective operating state visually. Of course, an acoustic and / or haptic message is possible. A haptic message, for example, have a vibration signal generator, which may be designed as a vibration motor.

In another embodiment, the signaling element for indicating the operating state of the operating unit can be arranged in an actuating button of the release switching element. This gives a clear function assignment.

In yet another embodiment, the controls can also be additional controls, z. B. for heating, massagers u. Like., Include.

In one variant, the release switching element is associated with a relay (an electromechanical control switch) with a load switching contact: When pressing the release switch, the relay to turn on the operating state "operation" on. Upon actuation of the release switch element, the control block is activated with its switch-off delay, a timer, whereby the release switch element either bypasses or keeps the relay switched on for a certain time. After a predetermined time or after a predetermined time when no operation of a control element, the relay drops or drops the timer again and interrupts the power supply to the controls, with the operating state "off" is reached again.

Each operating element has changeover contacts, which are connected directly to the terminals of the respective electric motor during operation of the respective electric motor, which is also referred to as a direct circuit. Each control element thus switches with the associated changeover contact directly to the respective electric motor, so that according to this embodiment and advantageously can be dispensed with a control unit.

An electromotive furniture drive for adjusting a movable part of a furniture by means of an output member, with a) at least one adjustment with at least one electric motor, a speed reducer coupled thereto, with which the driven member is drivingly coupled and linearly movable and / or rotatably movable, b) at least one supply device, and c) at least one operating unit, may comprise the operating unit described above.

One with a) having at least one base element for coupling the furniture to a place of installation, and b) having at least one support element which has at least one part movably arranged relative to the support element or relative to a further support element or relative to the base element, c) d) wherein the furniture has at least one electromechanical furniture drive, e) wherein the at least one movably arranged part is coupled to the at least one electromechanical furniture drive can have the electromotive furniture drive described above ,

Reference to the accompanying drawings, the invention will be explained in more detail. Show it:

1 a schematic perspective view of an exemplary piece of furniture;

2 a schematic perspective view of an operating unit according to the invention;

2a an enlarged perspective view of a release switching element;

3 a schematic block diagram of an embodiment of an electromotive furniture drive; and

4 a schematic diagram of a portion of the embodiment according to 3 ,

1 shows an embodiment of a piece of furniture 1 , 2 shows a schematic perspective view of an operating unit according to the invention 10 in this 2a is an enlarged perspective view of a release switching element 16 shown. 3 shows a schematic block diagram of an embodiment of an electromotive furniture drive 100 ,

The furniture 1 is shown here as a bed and has at least one support element 3 for receiving objects, a padding, a mattress M and / or a person. The support element 3 is z. B. as a slatted frame, as a flat support surface or the like and formed on a base member 2 , here a frame with feet, to the coupling of the furniture 1 at a place of installation, z. B. floor, attached.

The support element 3 here has a back part 4 and a leg part 5 on which relative to the support element 3 and / or another support element or relative to the base element 2 are movably mounted. This movable arrangement is here by means of a so-called motion fitting 6 realized. The movement is designed to be displaceable and / or pivotable.

The furniture 1 also has an electromotive furniture drive 100 up, here two adjustable drives 7 and 8th , a utility 9 and an operation unit 10 includes.

The movably mounted back part 4 and the leg part 5 are each with an adjustment 7 . 8th coupled. That's the back part 4 with the adjustment drive 7 coupled. For movement or adjustment of the leg part 5 is the adjustment drive 8th intended.

The adjusting drives 7 . 8th are designed here as linear drives. The linear drives have one or a number of electric motors, wherein each motor is followed by a Drehzahlreduziergetriebe with at least one gear stage. The Drehzahlreduziergetriebe may be followed by another gear, for example in the form of a threaded spindle gear, which from the rotational movement of the motor, a linear movement of an output member 19 ( 3 ) generated. The last gear member or an associated further member forms the output member 19 , The output member 19 the respective adjustment drive 7 . 8th stands with the respective furniture component (back part 4 , Leg part 5 ) or alternatively with one with the base frame 2 connected component in connection, so that during operation of the electric motor of the respective adjustment 7 . 8th the movable furniture components 4 . 5 relative to each other or relative to the base frame 2 be adjusted.

The adjusting drives 7 . 8th are each with a drive line 7a . 8 at a connection unit 11 connected, which with the supply device 9 via a supply line 9e and with the operating unit 10 via a control line 18 communicates as in 3 is shown. The drive lines 7a . 8 and the operation line 18 are in the configuration shown usually on the connection unit 11 designed as pluggable cable connections. Of course, other connection types are possible.

The supply device 9 here has an electrical voltage source 9a on which the electrical energy, for. B. from the network, for the adjustment drives 7 . 8th provides. This is the supply device 9 in this example via a power cord 9b with a power plug 9c connectable to a mains connection. The power plug 9c conducts over the power cord 9b the input side mains voltage to the electrical voltage source 9a the supply device 9 , The voltage source 9a Here is a transformer which outputs a secondary voltage on the secondary side, by means of a sieve block 9d with rectifier and filter capacitor (s) in the form of a DC voltage across the supply line 9e to the connection unit 11 is forwarded.

The voltage source 9a can also be a rechargeable battery. In this case, the sieve chain can be omitted. A charging unit for charging the accumulator may be in the supply device 9 integrated and via the power cord 9b with the power plug 9c be connected to the mains.

Alternatively, the charging unit is connected upstream of a network-dependent power supply not shown in detail with mains input and secondary-side low-voltage output, which via a line, the charging voltage in the form of a DC voltage of the voltage source 9a supplies.

In a further alternative embodiment, the supply device 9 and the connection unit 11 be integrated together. It is also possible that the utility 9 and the connection unit 11 together on one of the adjusting drives 7 . 8th are located.

The furniture 1 is also the operating unit 10 assigned, with its controls 12 . 13 (please refer 2 ) the adjusting drives 7 . 8th via respective changeover contacts S1, S2 (see 4 ) are controllable.

The operating unit 10 in 1 is according to 2 provided with the control line for a wired transmission. Here is the control line 18 with the connection unit 11 connectable, z. B. pluggable. This is the free end of the control line 18 provided with a plug, not shown, which is usually in a socket of the connection unit 11 is inserted. This is not explicitly shown, but easy to imagine.

The operating unit 10 has a housing 10a on and is with controls 12 . 13 provided, which for the operation of a respective adjustment 7 . 8th are provided. The controls 12 . 13 are z. B. as a button, each with a changeover S1, S2 (see 4 ). For example, serve the controls 12 for raising and the controls 13 for lowering the respective movable furniture part. In 2 is the operating unit 10 shown for six adjusting drives, but usually one or two adjusting drives 7 . 8th in this configuration.

When operating a control element 12 . 13 switch respective changeover contacts S1, S2 the respective motor M of the associated adjusting drive 7 . 8th directly, without that an additional switching element, such as motor relay or semiconductor switch, is controlled. This will be even more closely related below 4 explained.

Furthermore, the operating unit 10 with a reporting element 14 , z. B. a light emitting diode equipped. The reporting element 14 serves z. B. for function display or feedback, error display, etc.

Additional Controls 15 and 17 , which may also consist of several controls and / or a combination control element, for example, for additional functions such. B. reading light and / or heating provided.

The additional controls 15 and 17 can be designed as buttons and / or switches.

In addition, the operating unit has 10 a release switch element 16 a release switching device 20 (please refer 4 ) on. By means of the release switching element 16 becomes the release switch 20 which controls an energy supply to the operating unit 10 turns on and off. A detailed description is given below in connection with 4 ,

The release switch element 16 here has an operating button 16a on which in 2a is shown enlarged in an exemplary embodiment. The operation button 16a is circular, with two extending from the perimeter of the actuating knob 16a to the left and right radially extending side bars 16b on the operating button 16a are formed. In addition, on the surface of the actuating knob 16a a symbol molded or / and molded. The special shape of the actuating knob 16a of the release switch element 16 is used to distinguish it from the other controls 12 . 13 and additional controls 15 . 17 , Thus, alternative embodiments of an actuating button come 16a in question. It is important that the control knob 16a with its geometry or with its inscription or with its description or, more generally, with its appearance from the other operating elements 12 . 13 differentiates and takes off.

The operation button 16a of the release switch element 16 is in the top of the case 10a the operating unit 10 in one of the outer contour of the actuating button 16a arranged corresponding recess.

The adjusting drives 7 . 8th can be designed as a brushed DC motors or have them.

In 4 is a schematic diagram of a portion of the embodiment according to 3 shown.

The adjustment drive 7 . 8th , the supply device 9 , the operating unit 10 and the connection unit 11 are each marked with dash-dotted rectangles.

The operating unit 10 has the release switching device 20 , which is framed by dashed lines, on. The release switch device 20 includes the release switch element 16 with at least one switching contact S3 (here designed as a closing contact, of course, a normally closed contact is also possible) with connections 3 and 4 , a power switching unit 21 with at least one power switching contact S4 (here designed as NO contact, of course, a normally closed contact is also possible) with connections 3 and 4 , and a control block 22 ,

The electromotive drive 100 is in this example only with an adjustment 7 . 8th shown, with further adjusting drives 7 . 8th are connected in the same way, which is easy to imagine. The adjustment drive 7 . 8th has a motor M in the form of a DC motor.

The supply device 9 is here only with the voltage source 9a with the poles + and - the voltage source 9a shown. These poles + and - are connected to supply terminals A + and A- of the connection unit 11 electrically connected.

The motor M of the adjustment drive 7 . 8th is at motor connections A1 and A2 at the connection unit 11 connected.

The motor connections A1 and A2 as well as the supply connections A + and A- of the connection unit 11 are here with appropriate connections of the operating unit 10 connected via a common, multi-pin connector.

The motor connection A1 is connected to a common connection 1 a changeover contact S1 of the operating element 12 connected. In the same way, the motor connection A2 is at the common connection 1 the changeover S2 of the control element 13 connected.

One NC connection 2 of the changeover contact S1 is connected to the normally closed terminal 2 of the changeover contact S2 and connected to the supply terminal A-. This line is also referred to as minus line.

A normally open connection 3 of the changeover S1 is with the NO connection 3 of the changeover S2 and a normally open terminal 3 the power switching contact S4 of the power switching unit 21 the release switching device 20 connected. The power switch contact S4 serves to connect this line to the supply terminal A +. This line from the supply terminal A + to the NO terminals 3 the changeover S1, S2 is also referred to as positive line

In the rest position of the switching contacts S1, S2 of the operating elements shown here 12 . 13 the motor M is short-circuited via the closed NC 1/2 of the changeover S1, S2 and their common connection. This is also called "regenerative braking" of the motor M.

By pressing one of the controls 12 . 13 closes the respective closer 3/4 of the associated changeover S1, S2 and then connects the associated motor terminal A1 or A2 with the terminal 3 of the power switch contact S4. When the power switching contact S4 is closed, its normally open terminal is 3 with the NO connection 4 connected. So then the associated motor terminal A1 or A2 via this described connection to the supply terminal A + of the voltage source 9a the supply device 9 connected, and the motor M rotates in the desired direction of rotation for adjusting the associated furniture part. In this way, the motor current flows from the voltage source 9a directly through the switching contacts S1, S2 of the associated controls 12 . 13 to the engine M and back.

The power switching unit 21 is designed here as a relay with the power switching contact S4. One connection of the power switching unit 21 (here: relay coil) is connected to the supply terminal A- the voltage source. The other connection of the power switching unit 21 is at a terminal d of a control block 22 connected.

The control block 22 in turn has supply voltage terminals a and b, where a constantly with the supply terminal A- and b constantly with the supply terminal A + of the voltage source 9a are connected. A control terminal c of the control block 22 is with a connection 3 the switching contact S3 of the release switching element 16 connected, with its connection 4 with the supply connection A + of the voltage source 9a connected is. In this embodiment, the switching contact S3 is a button.

By pressing the release switch element 16 the release switching device 20 the closing contact (3/4) S1 is closed and the control block 22 receives via its control input c a positive voltage from the supply terminal A + of the voltage source 9a , The control block 22 then connects its output terminal d to its terminal a (positive supply terminal A +), the power switching unit 21 is activated and its power switch contact (3/4) S4 closes. The closed power switching contact (3/4) S4 causes in this way a power supply of the operating unit 10 by the positive supply terminal A + of the voltage source 9a with the changeover contacts (connections 3 ) connected is. This operating state of the operating unit 10 is called "operation". The operating state without power supply is referred to as "off". The release switch device 20 serves in this way for switching the operating state of the operating unit 10 from the operating state "Off" to the operating state "Operation" and back.

It is also possible that the power supply only for previously definable, certain controls 12 . 13 and / or additional controls 15 . 17 by means of the release switching element 16 can be switched on and off, with the other controls 12 . 13 and / or additional controls 15 . 17 are constantly supplied with an energy supply.

After releasing the control knob 16a of the activation element 16 opens its closing contact (3/4) S3 again. The control terminal c of the control block 22 is then tension. The control block 22 is designed so that its output terminal d continues to carry voltage for a predetermined period of time. This will cause the power switching unit 21 remains activated, whereby the power switching contact (3/4) S4 remains closed. As a result, the power supply of the operating unit 10 is maintained for the pre-definable period of time. The pre-definable period of time may, for. B. be 30 s.

After the expiration of the pre-definable period of time, the control block switches 22 its output d de-energized and the power switching unit 21 is switched off, ie the power switching contact (3/4) S4 is opened and the power supply of the operating unit 10 will be interrupted again. This interruption of the power supply of the operating unit 10 regardless of whether a control element 12 . 13 or additional control element 15 . 17 is pressed or not. This increases security for a user. Press this permanently a control element 12 . 13 or additional control element 15 . 17 , the power supply is still from the control block 22 and the power switching unit 21 interrupted after the pre-definable period of time.

The control block 22 has a turn-off delay circuit. If the Power switching unit 21 is a relay, the turn-off delay circuit can consist of a capacitor connected in parallel to the coil of the relay in a simple structure.

The switch-off delay can also be an integrated electronic module with a fixed or / and variable setting of the previously definable time period, ie. H. be the shutdown delay. Many embodiments are possible here.

The control block 22 may be designed in another embodiment so that when not in use the operating unit 10 if z. B. no control 12 . 13 or additional control element 15 . 17 more is pressed, ie after successful actuation, the control block 22 the power switching unit 21 switches off after another pre-definable period of time. This other pre-definable period of time can z. B. be 10 s.

Alternatively, the control block 22 be formed as a T-flip-flop, wherein at a first actuation of the release switching element 16 the power switching unit 21 switched on and a second actuation of the release switching element 16 the power switching unit 21 is switched off again. It may also be possible that after the second actuation of the release switching element 16 the control block 22 the power switching unit 21 switches off again after expiry of a previously definable period of time.

The power switching contact (3/4) S4 of the power switching unit 21 can either in the positive line (supply connection A +) as in 4 shown or in the negative (supply port A-) or be arranged as a double contact in both supply lines.

The release switch device 20 is in the case 10a the operating unit 10 arranged. It is also conceivable an arrangement, for. B. the power switching unit 21 and the control block 22 in the utility 9 as well as in the connection unit 11 , In this case, corresponding control lines in the control line 18 are provided.

Of course, the release switch element 16 also be designed as a latching push-button.

The invention is not limited to the embodiments described above. It is modifiable within the scope of the appended claims.

For example, it is conceivable that the power switching unit 21 with the power switching contact (3/4) S4 can also be used as a semiconductor switching element, for. B. MOS-FET, may be formed. It is also possible to use a combination of relay and semiconductor switching element, in which case the power switching contact (3/4) S4 consists of a series connection of relay contact and semiconductor switching element.

It is possible that in the operating state "operation" upon actuation of a control element 12 . 13 the switch-off delay can be reset. The switch-off delay is reset to its original position. The delay time then begins to run again either immediately or only after completion of the operation of the relevant control element 12 . 13 ,

It is also conceivable that the power switching unit 21 a relay with the power switching contact S4 and an additional auxiliary contact, which is used as latching the relay and in the current path of the control block 22 controlled off switch is arranged.

The power switching unit 21 and the control block 22 may also be integrated with each other and form a common unit, for example, a so-called time relay.

The release switch element 16 may also be additionally or only designed as a movement switching element, vibration switching element or the like.

Of course it is also possible that the release switch element 16 is coupled to the power switching contact S4 with an electromechanical control switch, wherein the release switching element 16 controls the power switch contact S4.

The power switching contact S4 may also be an opener.

The reporting element 14 can also be used to display the operating status. It can also act as an additional reporting element 14 be provided for the operating condition. Such an operating status indicator can also be found in the operating button 16a of the release switch element 16 be arranged, wherein the actuating button 16a is designed accordingly (eg translucent for light of a signal light).

LIST OF REFERENCE NUMBERS

1

Furniture

2

basic element

3

support element

4

back

5

leg part

6

movement fitting

7, 8

adjustment

7a, 8a

drive line

9

supply

9a

voltage source

9b

power cable

9c

power plug

9d

Siebblock

9e

supply line

10

operating unit

10a

casing

11

connection unit

12, 13

operating element

14

signaling element

15

Additional control element

16

Release switching element

16a

actuating button

16b

side web

16c

symbol

17

Additional control element

18

operating instruction

19

driven member

20

Enable switching device

21

Power switching unit

22

control block

S1, S2

changeover

S3

Contact

S4

Power switching contact

100

Electromotive furniture drive

A1, A2

Verstellantriebsanschluss

A +, A-

supply terminal

M

mattress

Claims (13)

Operating unit ( 10 ) of an electromotive furniture drive ( 100 ) with a supply device ( 9 ) and at least one adjusting drive ( 7 . 8th ), comprising a housing ( 10a ), Controls ( 12 . 13 ) for operating the at least one adjusting drive ( 7 . 8th ) of the electromotive furniture drive ( 100 ), and a control line ( 18 ), whereby the operating elements ( 12 . 13 ) Umschaltkontakte (S1, S2), which for direct switching of a motor current of the assigned at least one adjusting drive ( 7 . 8th ), wherein the operating unit ( 10 ) a release switching device ( 20 ) with a release switch element ( 16 ), which for switching an operating state of the operating unit ( 10 ) from an operating state "off" in which previously definable operating elements ( 12 . 13 ) are without function in operation, in an operating state "operation", in which the previously definable operating elements ( 12 . 13 ) upon actuation, operating the at least one adjusting drive ( 7 . 8th ), is formed, wherein the release switching device ( 20 ) the release switch element ( 16 ) with an actuating button ( 16a ) and at least one switching contact (S3), a power switching unit ( 21 ) with at least one power switching contact (S4) in at least one supply line of the control elements ( 12 . 13 ), and a control block ( 22 ) for controlling the power switching unit ( 21 ), and wherein release switching device ( 20 ) with the at least one switching contact (S3), the power switching unit ( 21 ) with at least one power switch contact (S4) and the control block ( 22 ) in a housing of the operating unit ( 10 ) are arranged. Operating unit ( 10 ) according to claim 1, characterized in that the release switching element ( 16 ) is designed as a button. Operating unit ( 10 ) according to claim 1 or 2, characterized in that the control block ( 22 ) has a turn-off delay with a pre-definable period as a time delay. Operating unit ( 10 ) according to claim 3, characterized in that the switch-off delay of the control block ( 22 ) is designed such that upon actuation of the release switching element ( 16 ) is activated. Operating unit ( 10 ) according to claim 3 or 4, characterized in that the switch-off delay of the control block ( 22 ) is designed so that it depends on an actuation of a control element ( 12 . 13 ) is independent. Operating unit ( 10 ) according to claim 3 or 4, characterized in that the switch-off delay of the control block ( 22 ) is designed so that in the operating state "off" of an actuation of a control element ( 12 . 13 ) independently and in the operating state "operation" upon actuation of an operating element ( 12 . 13 ) is resettable. Operating unit ( 10 ) according to one of claims 1 to 6, characterized in that the power switching unit ( 21 ) is a relay with the at least one power switch contact (S4). Operating unit ( 10 ) according to one of claims 1 to 6, characterized in that the power switching unit ( 21 ) is a semiconductor switch. Operating unit ( 10 ) according to one of claims 1 to 6, characterized in that the power switching unit ( 21 ) has a relay with the at least one power switching contact (S4) and at least one semiconductor switch, which is connected in series with the power switching contact (S4). Operating unit ( 10 ) according to one of claims 1 to 9, characterized in that the release switching element ( 16 ) is formed with the switching contact (S3) as a moving switching element, vibration switching element, touch-sensitive switching element, or the like. Operating unit ( 10 ) according to one of the preceding claims, characterized in that the operating unit ( 10 ) at least one reporting element ( 14 ) for displaying the operating state of the operating unit ( 10 ) having. Operating unit ( 10 ) according to claim 11, characterized in that the signaling element ( 14 ) for displaying the operating state of the operating unit ( 10 ) in an actuating button ( 16a ) of the release switch element ( 16 ) is arranged. Operating unit ( 10 ) according to one of the preceding claims, characterized in that the operating elements ( 12 . 13 ) also additional operating elements ( 15 . 17 ).

Images