Abstract: The invention relates to an electromotive adjustment drive which is operated by a safety voltage, for instance, an adjustment drive for the adjustable components of pieces of furniture. The adjustment drive is equipped with a hand-operated device and a control unit which is operated with the device and connected by at least one cable to a voltage source to which the mains voltage can be supplied. The adjustment drive is so configured as to allow an electrical separation between the voltage source and the transformer, when the adjustment drive is not in operation, without requiring special cables. Furthermore, the adjustment drive should be configured in such a way that the item equipped with the adjustment drive does not contain any cables or lines to which mains voltage is supplied. According to the invention, there is provided a power supply module (12) which is spatially separated from the control unit (14) and arranged between the control unit (14) of the adjustment drive (11) and the voltage source.

Abstract: An electric-motor drive system having a drive motor and a drive train comprising a worm gear, designed such that the overall dimensions are comparatively small and the pivot angle of rotation of the component cooperating with the output member of the drive system is comparatively large. The worm gear is the output member of the drive train. The worm gear has a central shaped hole for positive-fit connection to a rotatable input member of an adjustable device. The worm gear has a further gear step, preferably a worm drive, on the output side.

Abstract: An electromotive linear drive includes one or more drive motors and a corresponding number of torque-reducing transmissions and corresponding driven spindles and a casing. The casing is comprised of two casing parts, whereby the abutting surfaces of the casing parts are sealed by a sealing element or a plurality of sealing elements. Connecting terminals for mechanical and/or electrical components are provided on the exterior of the casing parts.

Abstract: An operational check of the safety unit or the safety circuit takes place within the delay time of the relay, assigned to each motor, caused by the pick-up delay or the release delay. Also, the control unit can be equipped such with at least one safety component and/or safety circuit for controlling the control unit that an operational check of the control unit takes place between the operation of an operating element of the hand switch and the starting of the motor or motors. The operating time and the release time of the relay may be delayed by a suitable component so that sufficient time is available for the operational check.

Abstract: An adjustment device for adjusting an article of furniture, includes a drive unit having at least one direct current positioning motor connected to a mains power source; a control unit with at least one switching device for actuating the positioning motor(s); and a mains disconnect relay connected to a mains power plug assembly or a supply line connecting the voltage source to the mains. An additional switching unit which is separate from the switching device(s) for actuating the positioning motor(s) is provided for actuating the mains disconnect relay.

Abstract: A linear drive to drive an article of furniture includes at least one drive motor that is coupled with a linearly moveable driven member and a braking system with a controlled braking element which commences the braking function without delay. The braking system can have a small footprint. According to the invention, the drive for the article of furniture can include an actuator, such as a piezo actuator coupled directly or indirectly with the braking element acting on the rotor shaft of the drive motor. The piezo actuator is preferably connected to the electric terminals of the drive motor. The linear drive can be used to adjust the support for a lath bed or a chair.

Abstract: An electromotive drive mechanism for a body of furniture, includes a worm drive which is activated by a motor and includes a worm received in the casing and a worm wheel in engagement with the worm. Received in the casing is a support body which is closely fitted around the worm and includes a receiving opening for engagement by the worm wheel.

Abstract: An electromotive linear drive mechanism, in particular a drive mechanism for a body of furniture, includes an electric motor having an output journal and a rotating spindle which has mounted thereon a nut, secured against rotation. The nut is operatively connected to the body of furniture, for movement in longitudinal direction of the spindle when the spindle rotates. A worm drive includes a worm which rotates about an axis of rotation and is in engagement with the output journal of the electric motor. Connecting the worm drive to the spindle are at least two worm gears which are in engagement with the worm and arranged in symmetric disposition with respect to the rotation axis of the worm. Each worm gear which is connected to a cylindrical gear is in operative engagement with the respective cylindrical gear meshing with the other worm gear.

Abstract: An electromotoric operating mechanism, such as a single drive or dual drive, for height adjustment of an article of furniture, especially for furniture items useful in the field of hospitals and/or nursing, includes a drive having an output member in the form of a worm wheel, a spindle mechanism including an adjusting spindle in driving relationship with the drive, and a spindle nut mounted on the adjusting spindle and interacting with a link member in fixed rotative engagement with a shaft of an adjustable piece of furniture, and a clutch mechanism releasably coupling the output member with the adjusting spindle. The clutch mechanism includes a guide member, which is fixedly secured on the adjusting spindle, and a clutch gear, with the worm wheel rotatably mounted on the guide member. The clutch gear is arranged on the guide member in fixed rotative engagement but axially displaceable relative thereto.

Abstract: A hospital bed or nursing bed has movable components which can be adjusted by a drive including a plastic casing and an electric motor accommodated in the casing. A control block is operatively connected to the drive and includes a circuit board for the control of the electric motor. In order to realize a night light when the lighting of the room is switched off, without significant modification of the plastic casing, a light source is provided which is connected to an electrically conductive pathway of the circuit board. The light source is suitably disposed inside the casing and directly placed onto the electrically conductive pathway of the circuit board. Juxtaposed to the light source is a luminescent rod or light-conducting rod penetrating a wall or lid of the casing for transmitting light rays radiating from the light source.