EP0684030B1 - Arm-chair with standing-up aid - Google Patents

Abstract

The arm-chair is connected to a base (12) by an adjusting lever. The base is held in the reclining and sitting position by a detachable catch on the chair frame (1) or by fitments. The catch is forced into a release position, when the cross-bar (8) is moved from the reclining into the sitting position by the lever. The adjusting lever is swivelled by a linear adjusting drive mechanism (6). A rigid cross-bar (22) to which the second end of the adjusting mechanism is linked forms part of the base. The catch is in the form of a bolt released against the force of a closure spring (16), as top bolt is fixed to the adjusting lever of the base.

Description

The invention relates to an armchair with a stand-up aid, consisting of a frame part with side panels, one arranged in the frame between the side cheeks Seat part with swiveling backrest and extendable footrest, the seat part including velvet Backrest and footrest can be raised and integrated into one Sloping position towards the front edge of the seat can be pivoted by means of a linear actuator, the frame being arranged in the corner areas thereof Rolls or runners on the footprint, wherein the linear actuator consists of one electric servomotor with extendable and retractable There is adjusting means, one end of which is at a first rigid crossbar is articulated and the other end of the Actuator on one of a second, rotatable Traverse protruding lever is articulated, the first Traverse in the rear seat the area near the backrest and the second traverse in the opposite front area below the Seat part is mounted, in particular by the Protect the second traverse lever by means of which Articulated chains for the backrest inclination and if necessary the swiveling of the footrest can be actuated, and the actuating forces and link chain geometry in such a way is coordinated that when adjusting the Seat part from the stand-up position in the Sitting position and back to the stand-up position by means of the actuator, the rotation of the second Traverse through in the travel of the traverse or with it coupled parts is limited stops, and with further adjustment of the same direction Actuator the traverse to the backrest inclination or Swiveling the footrest is rotatable.

With such an armchair is in the normal sitting position the seat part slightly back towards the backrest sloping to provide the user with a sufficient To offer seating comfort. Furthermore, the backrest pivotable from the sitting position to a rest position. A footrest can also be provided, which can be opened to the seat for Extend legs or feet to extend.

This makes it easy for elderly and disabled people in particular being able to get out of the armchair is a motor one actuatable stand-up aid provided, by means of which the Seat part, if necessary, including the backrest slightly from the in a slightly sloping position towards the backrest Position sloping forward to the front edge of the seat can be pivoted and at the same time the seat part is raised to a sufficient extent so that the User already transferred to an easy standing position is and can easily stand up from the armchair.

To move such armchairs on the ground and Such armchairs usually have the ability to adjust four rollers or ball-like runners, by means of whose chair frame stands on the floor, so that the user rolling or pushing the armchair can move, even while sitting in the armchair.

A disadvantage of such armchairs is that the armchair then when the person inside is taking advantage of it who wants to get up from the armchair, easily against the support direction of those located in it Person rolls back so that use is not is sufficiently safe.

To ensure that the armchair is in the sitting position is easily slidable on the surface in which Position, however, the chair firmly on the Is underground, is already from DE-U-91 12 558 a solution has been proposed. Thereby at Transfer the chair from the seat to the Standing position causes the front rollers of the Armchairs are disengaged from the ground and instead a pair of stands in the front area the chair is firmly supported on the floor so that the possible rolling movement is prevented.

With such armchairs, it has also been suggested by means of one and the same motorized actuator to operate the stand-up aid and the inclination of the backrest and, if necessary, to actuate the footrest swivel.

The previously known version has indeed in practice proven, but in some cases the Stability of the armchair in the stand up position not yet considered sufficient.

It has also been proposed to do so Equip an armchair with a stand-up aid so that it is attached to the armchair a large base part arranged and held which is in the standing position over the entire surface supported on the ground (footprint) and the whole The armchair is lifted from this stand and into Is tilted to the Form stand-up position. Here is a high one Stability of the armchair in the standing up position guaranteed. A disadvantage of this version is but that especially when only one electromotive actuator with an off and retractable threaded spindle is provided on then acts on the two rotating beams required there are intermediate positions in which the Stand part undesirable independently on the floor lowers, so that the rotating or pushing movement of the armchair is disabled relative to the underground. This effect is apparently based on the fact that is usually used electric actuator with a threaded spindle, the tensile or Pressure forces when adjusting the backrest of the Change the armchair from the seating position to the rest position. The spindle is initially loaded with pressure, a reversal when pivoting the backrest of the load case takes place, i.e. a tensile load on the Spindle enters. At that moment, the one with the Spindle coupled pedestal released so far that he can lower himself on the floor.

Based on this state of the art Invention based on the task of having an armchair Stand-up aid of the generic type to create the avoids the disadvantages and the in particular, it is guaranteed that both in the Sitzals the stand is completely in the rest position is lifted off the ground and only in the Stand-up position of the stand lowered on the floor then to move the armchair into the To be able to pivot the stand-up aid position.

To solve this problem, it is proposed that the armchair is coupled via a control lever to a base part which, when the actuator is adjusted in the same direction, from a position in which the backrest is inclined to a rest position and the footrest is extended into a sitting position in which the The backrest is less inclined and the footrest is retracted, and then the stand part is lowered and the entire armchair frame is raised,
and that the base part is held in the rest position and the sitting position by means of a detachable catch on the armchair frame or fitting parts in a position at least slightly back from the contact plane, which catch when the second cross member is pivoted out of the rest position into the sitting position or in the sitting position, by the truss's own Means, from the locking position, in which the foot part is held fixed to the frame, is forced into an unlocking position, in which the foot part can be moved into the standing position and back into the sitting position by pivoting the adjusting lever, the locking element automatically moving into the locking position when returning to the sitting position is and wherein the pivoting of the actuating lever takes place by means of the linear actuator and the rigid crossmember, to which the second end of the actuator is articulated, is part of the base.

A preferred further development is seen in the fact that the catch is releasable against a closing spring Is a slide or rotating bolt that is fixed to the frame on Chair frame or fittings is supported, and that a locking bolt on an adjusting lever of the base is held in the locking position by the detent is undertaken and is released in the unlocking position.

It is particularly preferably provided that the catch by means of a lever held on the second crossbar is releasable, by means of which the catch in the transition from the sitting position to the standing position in the unlocked position movable against the closing spring force or is pivotable and held in this position, until the rotary crosshead from the standing position to the beginning the seating position is pivoted, in which the detent the locking pin under the action of the closing spring spreads.

The training according to the invention ensures that the base part when the armchair from the Stand-up position is transferred to the sitting position (by actuating the electromotive Spindle drive) first the armchair on the floor is lowered until the armchair feet, castors or skids get up on the floor and the stand up by one slightly further than the one that then stands up Armchair is lifted from the riot level and in this position is positively locked. In the further Adjust the armchair from the sitting position to the The rest position can then be independent of that on the spindle acting tensile or compressive forces are guaranteed, that the stand is always at a distance from the floor and not unwanted supports in intermediate positions what would prevent the armchair from moving.

When actuating the actuator drive for the purpose of Transfer the chair to the stand-up position the armchair is first moved to the sitting position, then the notch is forcibly by elements of the second Rotating crossbar released so that the base part is released is and in the same direction further actuation of the the armchair is provided with an electromotive actuator the one supported on the contact patch Stand part raised and slightly inclined forward is pivoted so that the stand-up position is safe is reached.

The invention is hereinafter based on a strict schematic embodiment explained.

Fig. 1

einen Sessel mit Aufstehhilfe in der Sitzposition;

Fig. 2

eine Einzelheit dieser Position in Ansicht;

Fig. 3

den Sessel in einer Zwischenposition;

Fig. 4

den Sessel in Ruheposition;

Fig. 5

das Detail gemäß Figur 2 in der Ruheposition gesehen;

Fig. 6

den Sessel in der Aufstehhilfsposition;

Fig. 7

das Detail gemäß Figur 2 in der Aufstehhilfsposition.

It shows:

Fig. 1

an armchair with a stand-up aid in the sitting position;

Fig. 2

a detail of this position in view;

Fig. 3

the armchair in an intermediate position;

Fig. 4

the armchair in the resting position;

Fig. 5

seen the detail of Figure 2 in the rest position;

Fig. 6

the armchair in the stand-up position;

Fig. 7

the detail of Figure 2 in the stand-up position.

The armchair with stand-up aid essentially consists from a chair frame part 1 with side bolsters 2, the form armrests at the same time, one between the Sidewalls 2 arranged seat part 3, a backrest 4 and optionally a swiveling footrest 5.

In the embodiment shown, the backrest is 4 and the footrest 5 by means of two in parallel and near the side bolsters 2 on the armchair frame 1 attached link chains 19, 20 from the sitting position 1 into a rest position according to FIG. 3 and 5 pivotable, as well as in a standing position Figure 6, in which the front edge of the seat part 3 is sloping.

To operate the link chain mechanism is a electromotive actuator 6 with Remote control device 21 is provided. The actuator 6 is by the dash-dotted line 6 ' Articulation point extended. In reality it stretches the actuator 6 from the cross member 8 to the cross member 22 and is articulated on both (at 8 indirectly on the lever 9). The frame 1 is in the seating position according to the figure 1 and rest position according to Figures 3 and 5 on four in the Rollers 7 arranged corner areas on the contact plane on. The armchair is thus on this level of riot rollable.

The link chains 19, 20 for actuating the pivoting footrest and backrest 5 and 4 are not closer explained, since these are known elements acts. The electromotive actuator 6 is made from an electric servomotor with a retractable Actuator, for example, a threaded spindle free ends on a rotatable traverse 8 and one rigid traverse 22 are articulated, in particular levers protruding from the crossbeams. In the back, That is the area close to the backrest of the armchair frame 1 electrically extendable actuator facing away from the end Actuator based on the cross arm 22, which with the Stand 12 is rigidly connected, while the rotatable, second traverse 8 in the opposite front area on the frame 1 of the armchair below the seat part 3 is rotatably mounted. On the traverse 8 is a Adjusted lever 9 attached to which the linearly adjustable Element of the actuator 6 is articulated. The actuators and the link chain geometry are so on top of each other coordinated that when adjusting the chair from the Stand-up aid position according to Figure 6 in the sitting position according to Figure 1 or from the sitting position in the Standing up position by means of the actuator 6 Traverse 8 is held non-rotatably because in the Sitting position according to Figure 1 this movement by a arranged in the travel of a corresponding lever 24 Stop 23 the movement of the traverse 8 is blocked. The lever 24 is rigidly connected to the crossmember 8.

According to the fitting part of the armchair frame part 1, on which the crossmember 8 is also supported Adjusting levers 10, 11 coupled to the base part 12, so that when adjusting (extending) the Actuator 6 from the retracted position according to Figure 4 first a transfer to the position according to Figure 3 then in the position shown in Figure 1 and then into the position according to FIG. 6, with the transition from the sitting position according to Figure 1 in the standing position 6, the base part 12 relative to Chair frame 1 is extended so that the Armchair frame 1 no longer directly, but only still supported on the footprint on the base 12 and is raised. On the base 12 are the Adjusting lever 10,11 articulated, which also on Armchair frame part 1 are articulated. All joint axes run like the hinge axes of the articulation points of the actuator 6 parallel to each other and to the Swivel axes of the backrest part 4 and footrest 5. The base part 12 is in the rest position according to the figure 3, 4 and in the sitting position according to FIG. 1 by means of a on the adjusting lever 10 or 18 engaging releasable catch 13 on armchair frame 1 or fitting parts fixed to the frame 14 in at least a little from the contact plane held back position, as in Figure 1.3 and 4 is clarified. The catch 13 is at Swiveling the traverse 8 from the sitting position according to 1 in the stand-up position according to FIG truss own funds, namely a lever 15 from 5, in which the foot part 12 is fixed to the frame, in a release position forced in Figure 2 and in particular Figure 7 is shown. The foot section is in this unlocking position 12 by means of the actuator 6 via the actuating lever 10, 11 in the standing position according to FIG. 6 and back into the Sitting position movable according to Figure 1. When running back the catch 13 is in the sitting position according to FIG automatically transferred to the rest position. It is the catch 13 can be released against a closing spring 16, the fitting parts 14 fixed to the frame with one end is held while the other end on the detent 13th attacks. In the exemplary embodiment, the catch 13 is as Shear bolt designed in the direction of the elongated holes 17 is limited. The limitation is made by bolts 25, the fitting part 14 are arranged. On the one lever 10 of Stand 12 is a locking pin 18 is attached, which in 5 from the detent 13 is undertaken while he is in the unlock position Figure 2 and in particular Figure 7 is released. By this training is achieved that the base 12th when actuating the electromotive actuator 6 for transferring the chair from the stand-up position 6 into the sitting position according to FIG Reaching the sitting position according to Figure 1 or after according to further adjustment towards the rest position Figures 3 and 4 after slightly exceeding the Sitting position (Figure 1) in somewhat opposite Footprint of the raised position on the armchair frame 1 is held. The catch 13 then overlaps the locking pin 18 of the lever 10 and thus secures its location. Unless the armchair from the sitting position transferred to the rest position according to Figure 4 is a load change with regard to the action on the electromotive actuator, especially the Threaded spindle, connected. This is initially under pressure loaded to the backrest 4 by means of a push lever 26, which acts on the link chain 20, opposite to pivot the armchair frame 1. With a certain Swing angle reverses this load condition because then the backrest 4 compressive forces on the threaded spindle builds up what lead to the arrangement of the detent 13 would that the base part 12 on the Footprint lowered and thus the rolling or Sliding mobility of the armchair is prevented. This Lowering movement of the base 12 is by the Combination of detent 13 with detent pin 18 prevented.

The function according to the invention is the function guaranteed in an extremely simple way since there is none additional manipulation or actuators for Purpose of unlocking and locking the detent 13 requirement.

During the adjusting lever 10, the locking pin 18th has, between the positions of Figure 1 and 6 around its articulation points on the fitting part 14 and on the base 12 can pivot freely and thus in combination with the control lever 11 and the actuator 6, the lowering of Stand on the footprint and lifting the rest of the armchair in the stand-up position and the analog adjustment back to the sitting position (Figure 1) by extending the linear actuator (6) or Retracting the same is possible after reaching the Sitting position (Figure 1) and further retracting the linear actuator of the lever 10 with the Fitting parts 14 locked so that the base 12th remains in the raised position according to FIG. 1. In addition, the rotational mobility of the traverse 8 is Overflow of the sitting position (Figure 1) in the stand-up position blocked (mean 23.24) so that the travel of the actuator 6 between the positions shown in FIG 1 and 6 exclusively for operating the control levers 10.11 (handlebar) can be used and not for Change in inclination of the backrest 4 relative to Seat part 3 leads.

The training described can also be used in armchairs rigid backrest and / or without extendable footrest are used, which is also the subject of Invention is considered.

The invention is not based on the embodiment limited, but often within the scope of the disclosure variable.

All new, in the description and / or drawing disclosed individual and combination features regarded as essential to the invention.

Claims (3)

1. A chair with standing aid, consisting of a frame part (1) with side faces (2), a seat part (3) disposed in the frame between the side faces with a swivelling backrest (4) and extensible footrest, wherein the seat part together with the backrest and footrest can be raised and can be swivelled into an inclined position falling away towards the front edge of the seat by means of a linear actuator (6), wherein the frame stands on rollers (7) or runners disposed in its corner regions on the standing surface, wherein the linear actuator consists of an electric servomotor having extensible and retractable adjustment means (8, 22), the one end of which is hinged to a first rigid crosshead (22) and the other end of the actuator is hinged to a lever (9) protruding from a second, rotatable crosshead (8), wherein the first crosshead is disposed in the rear region - in the sitting direction - and the second crosshead is mounted in the opposite front region beneath the seat part, wherein in particular protruding from the second crosshead are adjusting levers, by means of which their link chains (19, 20) can be operated for the inclination of the rest and the swivelling out of the footrest, and the actuating forces and the link chain geometry are matched with one another in such a manner that upon the adjustment of the seat part from the standing aid position into the sitting position and back into the standing aid position by means of the actuating drive, the rotary movement of the second crosshead is limited by stops disposed in the regulating distance of the crosshead or of parts coupled therewith, and upon the further displacement of the actuating drive in the same direction the crosshead is rotatable to incline the backrest or to swivel out the footrest,
   characterised in that the chair is coupled via adjusting levers (10, 11) with a standing foot part (12), which during the displacement, in the same direction, of the actuating drive (6) is inclined - from a position in which the backrest (4) is inclined into a neutral position and the footrest (5) is extended, into a sitting position in which the backrest (4) is less inclined and the foot rest (5) is retracted and then into the standing position - the standing foot part (12) is lowered and the entire chair frame (1) is raised,
   and in that the standing foot part (12) is retained in the neutral position and the sitting position by means of a detachable catch (13) on the chair frame (1) or lock furniture (14) in a position set back at least slightly from the standing plane, which catch (13), upon the swivelling of the second crosshead (8) out of the neutral position into the sitting position or in the sitting position, by means belonging to the crosshead, out of the locking position, in which the foot part (12) is retained securely on the frame, is forced into an unlocking position in which the foot part (12) can be moved by means of swivelling the adjusting levers (10, 11) into the standing position and back into the sitting position, whereby when moving back into the sitting position the catch (13) is automatically transferred into the locking position and whereby the swivelling of the adjusting levers occurs by means of the linear actuating drive (6) and the rigid crosshead (22), on which the second end of the actuating drive (6) is pivoted, is a component of the standing foot (12).
2. A chair according to Claim 1,
   characterised in that the catch (13) is a sliding bolt or swivel bolt that can be unlocked against a closing spring (16), which is retained securely on the chair frame (1) or lock furniture (14),
   and in that mounted on an adjusting lever (10) of the standing foot (12) is a stop bolt (18), under which the catch (13) engages in the locking position and is released in the unlocking position.
3. A chair according to Claim 1 or 2,
   characterised in that the catch (13) can be detached by means of a lever (15) mounted on the second swivel crosshead (8), by means of which the catch (13), in the transition from the sitting position to the standing position, can be moved or swivelled into the disengaged position against closing spring resistance and is retained in this position until the swivel crosshead (8) is swivelled out of the standing position at the beginning of the sitting position or this is overrun, in which the catch (13) engages over the stop bolt (18) under the action of the closing spring (16).

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