DE4113598A1 - Continuous adjustment mechanism for movable furniture parts - acts as head and foot of slatted frame, and has two scissor type lifting elements, cross bar, motor and spindle - Google Patents

Abstract

The continuous adjustment for movable furniture parts, especially for raising and lowering the head or foot of a slatted frame, is attached to the main frame or to the middle section. One at least of two lifting elements (37,m 368) joined in scissor-formation in a link (45) is joined to a cross-bar (39). A motor (23) is positioned on an axially movable spindle (49). The motor and the spindle's free end (26) are joined by link-arms (30, 29) to the lifting-elements. ADVANTAGE - The scissor-type lifting elements move in a closing direction by raising the cross-bar, when the motor and spindle end move on top of each other, and open when the cross bar drops when the motor and spindle end move apart.

Description

The presented invention deals with a drive device for adjustable furniture. The to be presented Adjustment device should preferably be used for lifting and lowering head and / or footboards of a slatted base. In this area are a variety of different hardware types known.

These types of fittings usually consist of a support lever, which engages in a grid device and the furniture part in holds a certain angle of inclination. Because the grid spacing is not can be chosen arbitrarily small, is a stepless Adjustment with these fittings not possible.

They can only be adjusted manually and beyond that only be brought back into a stretched starting position if they be pushed first in the largest angular position. It can then the support lever over the notches along down slide and the lifting device can be lowered down.

The obstructed invention has the object, the disadvantages mentioned eliminate the fittings described above and so on Adjustment to create, with the adjustable furniture can be retrofitted and the simple operation one stepless adjustment of the adjustable (usually swiveling) Furniture parts is possible. Likewise, the starting position without Approaching the end position can be achieved from any angle position can.

These specifications are inventively defined by two different, with a low voltage direct current motor plus gearbox (im another motor), whose output by means of a rotating internal thread nut takes place, connected, fittings reached. The self-installation of the adjustment with both types of fittings is possible.

Sketch 3 shows an application example of an adjusting device ( 81 ) according to the invention in a slatted frame ( 80 ).

Fitting 1 :
Adjusting device with a non-stationary motor, axially movable spindle and a synchronous fitting ( sketch 1 as an application example of an adjusting device according to the invention for use in a slatted frame, with sketch 2 as a variant)

This adjusting device according to the invention allows infinite adjustment and, since the motor ( 23 ) reversible direction, starting any desired position in the adjustment range from each actual position.

The attachment of the motor ( 23 ) with the spindle ( 49 ) is very simple, since the synchronous mechanism on one side by a bracket ( 30 ) includes the motor, and the motor can be rotatably mounted here by suitable fasteners. The spindle is provided at the other end of the fitting with a clevis ( 26 ), so that here also a simple attachment to the central arm ( 29 ) of the synchronous mechanism is possible. From here, a transmission rod ( 27 ) goes to the right arm ( 28 ). Motor, clevis and transmission rod are each rotatably connected to the corresponding arms.

The arms ( 28, 29 and 30 ) are in turn connected to the synchronizing levers ( 35, 37 and 38 ). The motor located on the arm ( 30 ) is firmly connected to the associated synchronizer ( 38 ). The remaining arms ( 28 and 29 ) are rotatably connected to the associated synchronizing levers ( 35 and 37 ). The angle of rotation of the arms is limited by rollers ( 33 and 34 ) so that a lowering of the fitting against the engine is not possible. A lifting of the fitting is possible. This construction represents a tremendous increase in safety because a contracting pair of scissors is unable to apply clamping forces. In addition, the roller ensures that when lowering the mechanism by hand after lifting by hand in any case, the defined starting position is reached again before lifting by hand.

The synchronous lifters 35 and 36 and 37 and 38 are rotatably connected to each other in the joints 44 and 45 , respectively. At the same time, the synchronous jacks are only rotatable or displaceable and rotatably connected to the transverse rails ( 31 and 39 ).

Synchronizer 35 rotatable with cross rail 31st Point: 47 Synchronizer 36 rotatable with cross rail 39th Point: 43 Synchronizer 37 rotatable with cross rail 31st Point: 48 Synchronizer 38 rotatable with cross rail 39th Point: 41 Synchronizer 35 rotatable / displaceable with cross rail 39th Point: 42 Synchronizer jack 36 rotatable / displaceable with cross rail 31st Point: 46 Synchronizer 37 rotatable / displaceable with cross rail 39th Point: 40 Synchronizer jack 38 rotatable / displaceable with cross rail 31st Point: 32

The adjustment range is limited by adjusting nuts ( 24 and 25 ) on both sides of the motor, which actuate limit switches located in the motor.

A variant of fitting 1 is shown in sketch 2. To simplify the fitting, here the synchronizer 35 and 37 were shortened from sketch 1. This eliminates the turn-slide bearings 40 and 42 of sketch 1. The function is retained.

Function Description:

The adjusting device is in the starting position. Controlled by the control device ( 2 ) via the manual switch ( 1 ), the motor ( 23 ) runs in the stroke direction. As a result, the motor and clevis ( 26 ) move towards each other. About the arms ( 28, 29 and 30 ), the synchronizer ( 35 to 38 ) are moved and lift the upper cross rail. Here, the bearing bracket ( 32, 40, 42 and 46 ) move with the ends of the synchronizer on the sketch to the right. The adjusting device can be stopped at any position in the adjustment range. At the end of the adjustment range, the movement is maintained by the limit stop. As long as the adjustment mechanism is not in a limit switch ( 24 and 25 ), the mechanism can be moved in any direction.

Fitting 2 :
Adjustment device with a movable motor, axially movable spindle and a scissors fitting ( sketch 4 adjustment in elevation with sketch 5 as a variant)

This adjusting device according to the invention allows infinite adjustment and, since the motor ( 3 ) reversible direction, starting any desired position in the adjustment range from each actual position.

The attachment of the motor to the spindle ( 17 ) is very simple, since the scissors mechanism on one side by a bracket ( 8 ) comprises the motor, and the motor can be rotatably mounted here by suitable fasteners. The spindle is provided at the other end of the fitting with a clevis ( 6 ), so that here also a simple attachment to the other arm ( 7 ) the scissor mechanism is possible.

The adjustment range is limited by adjusting nuts ( 4 and 5 ) on both sides of the motor, which actuate the limit switches located in the motor.

The fastening of the fitting with the motor to the corresponding furniture parts (eg slatted frame) takes place overall via the two transverse rails ( 9 and 14 ).

The two scissor arms ( 11 and 12 ) are pivotally connected to each other in the middle by a rotary joint.

As shown in the sketch 4, the scissor arms on the left side of the cross rails on bearing bracket ( 11 and 13 ) are rotatably and slidably mounted. On the right side, however, the scissor arms are only connected by pivot joints ( 19 and 20 ) with the cross rails.

The left arm ( 7 ) of the fitting is rotatably connected to the left scissor arm ( 12 ) via a pivot ( 18 ). The angle of rotation of the arm is limited by a roller ( 15 ) so that a lowering of the fitting against the engine is not possible. A lifting of the fitting is possible. This construction represents a tremendous increase in safety because a contracting pair of scissors is unable to apply clamping forces. In addition, the roller ensures that when lowering the mechanism by hand after lifting by hand in any case, the defined starting position is reached again before lifting by hand.

A variant of the fitting 2 is shown in sketch 5. Here is the same function, but this time the safety function of arm 7 from sketch 4 is achieved by a slot ( 55 ). This change can be applied analogously to the fitting 1 in its variants according to sketch 1 and sketch 2.

Function Description:

The adjusting device is in the starting position. Controlled by the control device ( 2 ) via the manual switch ( 1 ), the motor ( 3 ) runs in the stroke direction. As a result, the motor and the clevis ( 6 ) move towards each other. Over the arms ( 7 and 8 ), the scissor arms ( 11 and 12 ) are moved and lift the upper cross rail. Here, the bearing bracket ( 10 and 13 ) move with the ends of the scissor arms on the sketch to the left. The adjusting device can be stopped at any position in the adjustment range. At the end of the adjustment range, the movement is maintained by the limit stop. As long as the adjustment mechanism is not in a limit switch ( 4 and 5 ), the mechanism can be moved in any direction. Due to the design of the adjusting device, it is possible that the rotationally fixed threaded spindle ( 17 or 49 ) moves parallel and at a distance from the transverse rails ( 9 and 14 or 31 and 39 ) of the adjusting devices.

Control unit ( 2 ) and engine ( 3 or 23 ):

The controller includes a power transformer and a control board. It preferably consists of a two-part housing. The adjusting device is usually controlled via a manual switch ( 1 ). But are also possible wireless remote controls, z. B. radio or infrared, or other electronic switching devices.

The motor ( 3 or 23 ) preferably consists of a two-part special plastic housing. It includes an output gear which centrally has a threaded spindle nut, so that the motor moves on the non-rotatable spindle ( 17 or 49 ).

Claims (1)

Adjusting device for movable furniture parts, in particular for raising and lowering of head and / or foot parts of a slatted base, which are hingedly connected to the main frame or the middle part, characterized in that at least two in a joint ( 45 ) scissor-like interconnected lifting members ( 37 , 38 ) are provided, of which at least one articulated with a transverse rail ( 39 ) which abuts for raising or lowering the movable furniture part of this frictionally, and that on an axially movable spindle ( 49 ) arranged motor ( 23 ), which is limited in the axial direction of the spindle ( 49 ) is movable, is provided, wherein the motor ( 23 ) and the free end ( 26 ) of the spindle ( 49 ) via articulated arms ( 30, 29 ) with the respective lifting members ( 37, 38 ) are connected so that the scissors-like lifting members ( 37, 38 ) move by raising the cross rail ( 39 ) in the closing direction, when the motor ( 23 ) un d to move the spindle end ( 26 ) toward each other and open, lowering the cross rail ( 39 ), as the motor ( 23 ) and the spindle end ( 26 ) move apart.