WO2010127732A1 - Chair - Google Patents

Abstract

The invention relates to a chair comprising a pedestal base, a column, a seat support, supported on the pedestal base via the column, and a seat supported on the seat support. The chair further comprises control device having a manually controllable control lever and an electrical switch which can be controlled by the control lever, for vertically adjusting the column via an electrical lift device.

Description

 chair

The invention relates to a chair. The chair is especially as Arbeitsbzw. Therapy chair trained.

Chairs are known from the prior art, the seats are adjustable in height. For corresponding lifting devices are provided. For the operation of the lifting devices often extremely complicated actuation mechanisms are necessary.

The invention has for its object to provide a chair, the lifting device is particularly simple and reliable actuated.

This object is achieved according to the invention by the features indicated in claim 1. The essence of the invention is that the electric lifting device can be actuated via an electrical switching device, which in turn can be actuated by a manually operated operating lever. The operating lever can also be used to adjust or lock the seat mechanism of the chair. For example, the seat support, the seat and / or a backrest support can be adjusted or locked.

Further advantageous embodiments are specified in the subclaims.

Hereinafter, a preferred embodiment of the invention will be described by way of example with reference to the accompanying drawings. Showing: Fig. 1 is a schematic side view of an inventive

chair,

2 shows a detail which essentially shows the actuating device of the chair from below,

3 shows a longitudinal section through the actuating device shown in FIG. 2, wherein the switching lever of the actuating device is in a first actuation position, and

4 is a view corresponding to FIG. 3, wherein the switching

Lever in a second actuation position.

Fig. 1 shows a chair with a chair frame 1. This is provided with a foot frame 2, which is supported by running rollers 3 against a floor. On the base frame 2, a height-adjustable chair column 4 is centrally mounted, at the upper end of a seat support 5 is attached. On the seat support 5, a seat 6 is arranged on the seat surface, a person can sit down. The seat 6 is rotatable relative to the foot frame 2. It is also possible that the seat 6 is arranged non-rotatable relative to the foot frame 2. With the seat support 5, a back-back support 7 is directly connected. The backrest support 7 projects rearward from the seat support 5. On the back-back support 7, a backrest 8 is attached to the front, to which a person sitting on the seat 6 person can lean with their backs. On the seat support 5 also two arm-backs 9 are attached laterally. The chair pillar 4 is formed as a telescopic tube and has a chair pillar center longitudinal axis 10 which extends vertically in the intended use of the chair. In the hollow chair pillar 4, an electric or electrically driven lifting device is housed to electrically adjust the axial length of the chair pillar 4 and the height of the seat 6 along the chair pillar center longitudinal axis 10 can. The lifting device has an electric drive and can further comprise a spindle device which can be actuated by the electric drive for adjusting the height of the seat 6 or for retracting and extending the chair column 4.

The electric drive can be actuated by an outer operating lever 11, which is mounted laterally pivotable on the seat support 5. The operating lever 11 has an operating lever-central longitudinal axis 12 which is substantially perpendicular to the chair column-central longitudinal axis 10 of the chair column 4 and horizontal. It comprises an outer, elongated actuating sleeve 13, in which an elongate actuating shaft (not shown in the drawings) extends. The actuating sleeve 13 and the actuating shaft are arranged coaxially with each other. The actuating sleeve 13 is annular in cross section. The operating lever center longitudinal axis 12 extends in each case in the center of the actuating sleeve 13 and the actuating shaft. The actuating sleeve 13 and the actuating shaft are pivotable about the control lever-means-longitudinal axis 12 independently of each other.

An actuation lever 14, which protrudes radially from the actuation sleeve 13 with respect to the operating lever-center-longitudinal axis 12, is rotatably connected to the actuation sleeve 13 on the outside. The actuation Lever 14 is in the to the free or outer end of the operating lever

1 1 adjacent edge region of the operating lever 11 attached.

The actuation shaft extends into the seat support 5. On the actuation shaft, an outer actuation rotary handle 15 is fixedly mounted at the end, which also closes the actuation sleeve 13 outwards and its center axis with the operator Lever center-longitudinal axis 12 is aligned. By the actuating shaft of the back-backrest support 7 and / or the seat support 5 and / or the seat 6 can be adjusted or locked. For this purpose, the actuation rotary handle 15 is about the operating lever center-longitudinal axis

12 to pivot manually, causing a corresponding pivoting of the actuating shaft. The actuation shaft is connected to a corresponding mechanism device in the seat support 5, which is an adjustment and / or locking of the seat support 5 and / or the backrest support 7 and / or the seat 6 allows.

Adjacent to the seat support 5 is on the outside of the actuating sleeve

13, an electrical switching device 16 rotatably arranged. The electrical switching device 16 comprises a box-like switching housing 17, in which an electrical, two-pole changeover switch is housed. The change-over switch comprises an elongated toggle lever 18 which is pivotable between two actuation positions and also has a stable rest position. The rest position is located centrally between the two actuation positions. The shift lever 18 is pivotally mounted in or on the switch housing 17 about a respective pivot axis. The pivot axis is substantially perpendicular to the chair pillar center longitudinal axis 10 and substantially perpendicular to the operating lever center longitudinal axis 12. It extends substantially horizontally. The changeover switch also has two changeover contacts, which are designed as electrical Umpol contact points. Via the switching lever 18, an electrical connection with a Umpol contact point can be made while the other Umpol contact point is then open. In the rest position of the changeover switch, both polarity reversal contact points are open or disconnected.

The shift lever 18 protrudes from the switch housing 17 in the direction of the seat support 5. The free end 19 of the shift lever 18 engages in an actuating opening 20 which is formed laterally in the seat support 5. The actuating opening 20 is slightly larger than the free end 19 of the switching lever 18. The boundary edge of the actuating opening 20 is substantially circumferentially at the free end 19 of the switching lever 18 at. The free end 19 of the shift lever 18 is pivotally received there; it is stored there but essentially stationary.

On the actuating sleeve 13, a plate-like lever link 21 is provided on the outside, the center plane is perpendicular to the operating lever center-longitudinal axis 12. The lever link 21 is rotatably connected to the actuating sleeve 13 and jumps from this radially outward. The switching housing 17 is attached to the actuating sleeve 13 via the lever link 21. The lever link 21 is located between the switching housing 17 and the seat support 5, wherein the lever link 21 is recessed accordingly for the switching lever 18.

Below the seat 6, two batteries 22 are arranged, which are electrically connected via electrical lines to the electric drive of the hub device. The batteries 22 supply an electrical voltage for actuating supply of the electric drive. The electrical connection between the batteries 22 and the electric drive can be closed or opened via the changeover switch.

The operation of the chair will be described in more detail below. To adjust the height of the seat 6 and the length of the chair column 4, the actuating sleeve 13 is to be manually pivoted about the operating lever 14 to the operating lever means longitudinal axis 12. For this, the actuating lever 14 is to move either in the direction of arrow 23 in the direction of the seat 6 upwards or in the direction of arrow 24 on the foot frame 2 down. The actuation lever 14 is thus to either pull up or down by a person sitting on the seat 6 person.

When the actuating sleeve 13 is pivoted in the direction of the arrow 23, the electrical switching element which is connected to it in a rotationally fixed manner moves.

Device 16 from its neutral rest position slightly down in the direction of the foot frame 2, which has the consequence that the switching lever 18 is pivoted upwards. This upper operating position of the shift lever 18 is shown in Fig. 4. A corresponding Umpol- contact point of the changeover switch is then closed, whereby the electric drive is fed by the batteries 22 so that the seat 6 is moved through the chair column 4 upwards. The other Umpol- contact point of the changeover switch is open.

If the actuating lever 14 is then released again, the actuating sleeve 13 is again pressed or pulled into its rest position via a corresponding spring element, such as a helical spring. Also, the shift lever 18 is thereby moved back to its rest position, in then the two Umpol contact points are opened and the electric drive is no longer energized.

If the actuating lever 14 is pressed down in the direction of arrow 24, the electrical switching device 16 is moved slightly upwards from its neutral resting position, so that the switching lever 18 is pivoted downwards. This lower actuation position of the shift lever 18 is shown in FIG. It is then closed the other Umpol contact point, so that the electric drive the seat 6 moves over the chair column 4 down in the direction of the foot frame 2.

If the actuating lever 14 is then released again, the actuating sleeve 13 is again pressed or pulled into its rest position via the spring element. Also, the shift lever 18 is moved back to its rest position, in which the two Umpol contact points are opened and the electric drive is no longer energized.

After the switching lever 18 is fixed on the one hand to the seat support 5 and on the other hand on the actuating sleeve 13, the switching lever 18 by the corresponding, caused by rotation of the actuating sleeve 13 relative movement between the seat support. 5 and actuation sleeve 13 is actuated and pivoted to the desired actuation position, in which then a Umpol contact point of the electric switch is closed and the hub device is adjusted accordingly by their electric drive. The switching lever 18 can also engage in a corresponding recess 20 in the seat 6 or the chair column 4. The free end 19 of the switch lever 18 can also be fixed elsewhere locally. As already mentioned, the seat support 5 and / or the backrest support 7 can be adjusted or locked by rotation of the actuation rotary handle 15. The actuating sleeve 13 and the actuating shaft can be operated independently of each other, so that the functions caused thereby are separated from each other.

The chair column 4 has an extremely large travel path. For example, the axial length of the chair column 4 or the height of the seat 6 can be changed between 400 mm and 600 mm. The chair can thus also be used well as a stand-up aid for a person sitting on the seat 6 person. For this purpose, the seat 6 is usually to go all the way up. Advantageously, the seat surface can also be tilted forward still strong, whereby the getting up is further simplified.

Claims

claims 1. chair a) with a foot frame (2), b) with a chair column (4), i. which is supported on the foot frame (2), ii. a chair-pillar center longitudinal axis (10), and iii. an electric lifting device for height adjustment of Chair column (4) along the chair-column-central longitudinal axis (10) is associated, c) with a seat support (5), via the chair column (4) on the foot frame (2 ), d) with a seat (6) supported on the seat support (5), and e) with an actuation device comprising i. a manually operable operating lever (11), and ii. a by the operating lever (11) operable electrical switching device (16) for height adjustment of the chair column (4) via the lifting device, f) wherein the operating lever (11) an outer, manually operable actuation G) wherein the seat support (5), the seat (6) and / or a backrest support (13) and in the actuating sleeve (13) extending, manually operable actuating shaft comprises 7) are adjustable and / or lockable by the actuating shaft, and h) wherein the actuating sleeve (13) serves to adjust the height of the seat. 2. Chair according to claim 1, characterized in that the actuating device on the seat support (5) is mounted operably. 3. Chair according to claim 1, characterized in that the switching device (16) comprises an electrical switch with an operable switching lever (18). 4. Chair according to claim 3, characterized in that the electrical switch has at least one electrical changeover contact. 5. Chair according to claim 4, characterized in that the electrical switch is designed as an electrical changeover switch, which has two actuating positions for actuating the lifting device, in which a change-over contact is closed in each case, and a between the Operational positions resting position to NichtBetätigung the hub device in which the at least one changeover contact is open. 6. Chair according to claim 5, characterized in that a spring element holds the changeover switch in the rest position. 7. Chair according to claim 3, characterized in that the switching lever (18) for actuation with the seat support (5), the seat (6) or the chair column (4) is in operative connection. 8. Chair according to claim 7, characterized in that the switching lever (18) for actuating in a recess (20) in the seat support (5), the seat (6) or the chair column (4) engages. 9. Chair according to one of the preceding claims, characterized in that the operating lever (11) has a control lever-center-longitudinal Axis (12), wherein the operating lever (11) about its operating lever means longitudinal axis (12) is pivotable. 10. Chair according to claim 9, characterized in that the electrical switch is arranged eccentrically to the operating lever means longitudinal axis (12) on the operating lever (11) for actuating the switching lever (18). 1 1. Chair according to one of the preceding claims, marked thereby, that the electrical switch rotationally fixed to the actuating sleeve (13) is attached. 12. Chair according to claim 11, characterized in that with the actuating sleeve (13) to the operating lever means longitudinal axis (12) radially projecting actuating lever (14) is rotatably connected.