Lumbar support for a chair, and chair having same
View Patent ↗The invention relates to a lumbar support ( 1 ) for a chair with a backrest comprising backrest carriers ( 7 ) which are pivotable independently of each other, wherein the lumbar support comprises support regions ( 10 a, 10 b ) which are each mounted on a spring element ( 2 ). The spring action of each spring element ( 2 ) is individually adjustable. In this arrangement, the spring elements ( 2 ) are arranged on a carrier ( 5 ), which can be articulated to the backrest carriers ( 7 ) of the backrest of the chair, which are pivotable independently of each other. The invention further relates to a chair with a backrest, which is formed from backrest carriers ( 7 ) which are pivotable independently of each other and which also comprises the aforementioned lumbar support ( 1 ). In this case, the lumbar support ( 1 ) is articulated to the backrest carriers ( 7 ) which are pivotable independently of each other.
1. A lumbar support ( 1 ) for a chair with a backrest which includes backrest carriers ( 7 ) which are pivotable independently of each other, wherein the lumbar support comprises:
support regions ( 10 a , 10 b );
spring elements ( 2 ), wherein the support regions ( 10 a , 10 b ) are each mounted resiliently on a separate spring element ( 2 ), each said spring element ( 2 ) having a spring action, wherein the spring action of each spring element ( 2 ) is individually adjustable by adjusting a position of a bearing element ( 3 ) along a length of the spring element ( 2 ) to adjust a force acting on a lumbar region of a seated person; and
a carrier ( 5 ), each of the spring elements arranged on the carrier ( 5 ), wherein the carrier can be articulated vertically up and down along the backrest carriers, which are pivotable independently of each other.
2. The lumbar support according to claim 1 , wherein the spring elements ( 2 ) each comprise a leaf spring ( 2 ).
3. The lumbar support according to claim 2 , wherein the spring action is adjustable via the bearing element ( 3 ) movable along a longitudinal axis of the leaf spring ( 2 ).
4. The lumbar support according to claim 3 , wherein the bearing element is moved along the longitudinal axis of the leaf spring ( 2 ) via a tapping mechanism ( 4 ).
5. The lumbar support according to claim 1 , wherein the support regions ( 10 a , 10 b ) are each mounted on the associated spring element ( 2 ) by means of a lever mechanism ( 6 a , 6 b ).
6. The lumbar support according to claim 5 , wherein the support regions ( 10 a , 10 b ) are movable relative to the carrier ( 5 ) synchronously via a gear unit ( 11 ) operatively connected to the respective lever mechanism ( 6 a , 6 b ).
7. The lumbar support according to claim 1 , wherein the backrest carriers each include a guide, and the support regions ( 10 a , 10 b ) are each formed in such a way that they can engage in the guides in the backrest carriers ( 7 ).