DE202004004541U1 - Armchair has mechanism to assist standing up consisting of motor connected to two-armed lever attached at one end to side walls of chair, drive system being attached to side wall, seat and to other end of lever - Google Patents

Abstract

The armchair has a mechanism to assist standing up. This consists of a motor (6) connected to a two-armed lever (7) which is attached at one end to the side walls (4) of the chair. A drive system (12) is attached to the side wall, seat (2) and to the other end of the lever.

Description

The present invention relates to an armchair with a stand-up aid according to the preamble of the claim 1.

Such armchairs are well known. to change the seat depth, for example to meet individual seating needs to meet, or to the seating conditions to different Adjust body sizes, can the seat part by a motor drive in a manner of speaking parallel displacement forward and upward positioned differently become.

There is also a drive motor provided with that of the two side bolsters, the seat part and one backrest comprehensive furniture body overall raised from a bottom position and pivoted forward can be so older or disabled people get up out of the armchair becomes.

In any case, are for both functions described require separate drive motors, which only due to a relatively high manufacturing cost are to be realized. This is natural associated with not inconsiderable costs, that of an economic Production of the armchair oppose.

In addition, each provides additional Drive motor a weak point with regard to an optimized Service life, because naturally drive motors are more prone to failure than is the case with purely mechanical drives.

Furthermore, each drive is only via its own Switchable hand switch, which can be operated separately from the other is. Such a plurality of switches require one accordingly cumbersome Operation, especially since there is either a risk of confusion if Similar switches are used, or these switches, for Distinction, must be specially marked what also increases costs.

The present invention lies based on the task of an armchair of the generic type to develop so that it is easier and less expensive producible and its susceptibility to failure reduced and thus the service life is increased.

This task is accomplished by an armchair solved, having the features of claim 1.

This constructive design can on the use of a second motor to adjust the height and depth the seat part can be dispensed with. The new constructive solution stands out all from the fact that they can be realized with little effort is at opposite the state of the art of the same functionality.

So are like a preferred one Formation of the invention provided only three gear parts required and that one articulated at the end of the two-armed lever Coupling link with an angle lever that is rotatably connected to the side wall is connected and a handlebar that swivels the other End of the bell crank and on the other hand in the front edge area on the underside of the seat part is articulated.

The drive motor that so far exclusively for the Raising the furniture body as Stand-up aid is used, used to hold the seat part in the mentioned way to adjust, the movements being independent of each other are, that is, the seat part is adjusted without raising the entire furniture body.

While for lifting the furniture body into one Position as a stand-up aid from a lowered basic position the spindle of the motor is extended when the seat part is adjusted the spindle retracted and the gearbox operated accordingly.

After another thought of The invention provides for the seat part to be provided with guide brackets which are opposite to the Sidewalls of fixed guide bearings correspond, which on the one hand results in an exact movement sequence when adjusting guaranteed of the seat part is and also a support the seat part takes place, which the seat part under load, that is Shot of a user who stops in the given position.

In combination with the gearbox So a sequence of movements of the seat part with only one drive motor allows which not only brings manufacturing advantages, but also Advantages regarding handling. In this case, that's enough a hand switch to separate the movements when erecting of the furniture body and at Adjust the seat part, where on the other hand, as described in relation to the prior art, so far two Hand switches were required, with each drive separately was controllable.

For obvious reasons Therefore, the invention provides improved ease of use. noteworthy is also that the purely mechanical parts for moving the seat part are many times more robust than a drive motor. As a result that the service life of the armchair is improved overall. This is true equally to a reduced susceptibility to faults of the overall system, since there is no second motor a potential source of interference does not apply without restriction usability or handling.

Further advantageous training the invention are characterized in the subclaims.

An embodiment of the invention will be described below with reference to the accompanying drawings.

Show it:

1 - 3 different positions of use of the armchair according to the invention, shown in a sectional side view.

In the figures is an armchair with a stand-up aid shown with a furniture body 1 who is a seat part 2 , a backrest 3 as well as two opposite, the furniture body 1 side cheeks 4 includes. The seat part 2 is opposite the installation area and a base frame resting on it 5 in height and opposite the backrest 3 adjustable in depth while the furniture body 1 overall by means of a drive motor 6 as a stand-up aid and can be tilted forward, as in the 2 is shown.

The installation fitting 7 is with a two-armed lever 8th provided the one with the drive motor 6 common axis 9 is pivotable and at one end opposite the side cheeks 4 is held stationary but rotatable, for which purpose it runs on a transverse, with the side cheeks 4 connected frame spar 10 connected.

In the 1 the armchair is shown in a "normal" sitting position, in which the seat part 2 partially under the upholstery of the backrest 3 is pushed.

When operating the drive motor 6 the spindle is extended and the entire furniture body 1 raised and tipped forward, being supported on the base frame 5 on the one hand and on the frame spar 10 on the other hand a handlebar 11 is connected, which is part of the installation fitting.

To the seat part opposite the base frame 5 to raise and opposite the backrest 3 Increase in depth is possible with the installation fitting 7 a gear 12 connected, the rotatable on the furniture body 1 , on the seat part 2 and on the other, the frame spar 10 opposite end of the two-armed lever 8th connected.

The gearbox is there 12 from around a pivot axis 18 with the two-armed lever 8th connected coupling link 13 , one of them with a swivel pin 19 rotatable angle lever 14 , which is also rotatable, but stationary with the help of a pivot bearing 22 on the side cheek 4 is attached, and one on the angle lever 14 in a cranked area via a joint axis 16 connecting handlebar 15 which, on the other hand, on a swivel bearing 17 at the bottom of the seat part 2 is connected in the front edge area.

Around the seat part 2 Bringing it into this widened and raised position becomes the driving motor 6 or its spindle opposite that in the 1 shown position retracted even further under tension on the two-armed lever 8th in the area of the axis 9 , This will make the handlebar 15 pushed forward and up at the same time, taking the seat part with it 2 , the rest of the guide bracket spaced from each other on the bottom 20 has, which are wedge-shaped in their contour and with one to the front edge of the seat part 2 strut rising in a guide bearing 21 are held that firmly with the side cheek 4 connected is. By guiding the guide bracket 20 in the assigned guide camps 21 becomes when pushing forward and lifting the seat part forward 2 this in its entirety evenly raised to an end position, as in the 3 is recognizable.

For lowering and retracting the seat part 2 in a position corresponding to the 1 the drive motor spindle is advanced 6 with the result that the transmission 12 or its components are pivoted accordingly. When the drive motor is operated again 6 and a further extension of the spindle, the furniture body is raised 1 in the in the 2 shown standing position.

1

furniture body

2

seat part

3

backrest

4

side cheek

5

base frame

6

drive motor

7

up fixture

8th

two-armed lever

9

axis

10

frame spar

11

handlebar lever

12

transmission

13

coupling member

14

bell crank

15

handlebar

16

joint axis

17

pivot bearing

18

swivel axis

19

pivot pin

20

guide bracket

21

guide bearing

22

pivot bearing

Claims (8)

Armchair with stand-up aid, with a backrest ( 3 ), a motor-adjustable seat part ( 2 ) and sidewalls ( 4 ) furniture body ( 1 ), which is installed using a fitting ( 7 ) on a base frame ( 5 ) is connected and by a on the base frame ( 5 ) on the one hand and on the fitting ( 7 ) on the other hand attached drive motor ( 6 ) can be lifted and swiveled in the sense of a stand-up aid, whereby the installation fitting ( 7 ) with a two-armed lever ( 8th ) is provided, which is one with the drive motor ( 6 ) common axis ( 9 ) is pivotable and which is at one end opposite the side cheeks ( 4 ) is stationary but rotatable, characterized in that a gear ( 12 ) is provided, which is pivotable on the side cheek ( 4 ), on the seat part ( 2 ) and at the other end of the two-armed lever ( 8th ) connected. Armchair according to claim ( 1 ), characterized in that the gear ( 12 ) on the two-armed lever ( 8th ) articulated coupling link ( 13 ), one rotatable on the side cheek ( 4 ) connected angle lever ( 14 ) and a handlebar ( 15 ), the coupling element ( 13 ) on the other hand with the angle lever ( 14 ) is connected, which has the pivotable handlebar at its other end ( 15 ), which in the front edge area on the underside of the seat part ( 2 ) is articulated. Armchair according to one of the preceding claims, characterized in that the coupling rod ( 15 ) via a swivel bearing ( 17 ) on the seat part ( 2 ) connected. Armchair according to one of the preceding claims, characterized in that on the seat part ( 2 ) spaced apart equally designed guide bracket ( 20 ) that are connected to the side cheeks ( 4 ) fixed guide bearings ( 21 ) correspond. Armchair according to one of the preceding claims, characterized in that the guide bracket ( 20 ) are wedge-shaped and arranged in the same direction. Armchair according to one of the preceding claims, characterized in that one with the associated guide bearing ( 21 ) corresponding strut of the guide bracket ( 20 ) to the front edge of the seat part ( 2 ) is increasing. Armchair according to one of the preceding claims, characterized in that the guide bracket ( 20 ) on the underside of the seat part ( 2 ) are arranged. Armchair according to one of the preceding claims, characterized in that in the front and rear edge region of the seat part ( 2 ) Guide bracket ( 20 ) are arranged.