Chair mechanism providing for an inclination range and inclination stop means
First Claim
1. A work chair mechanism providing for a swivelling range with stepless transition from a forwardly inclined position to a rearwardly inclined position based on the sitting posture and distribution of a user'"'"'s body, said mechanism comprising:
- a seat carrier (7) pivoted at a front portion about a front pivot axis (13) and a rear portion about a rear pivot axis (11);
a back rest carrier (8) in connection with the seat carrier about said rear pivot axis; and
a plurality of driver plates (15) forming a recess (16) in which a stop is provided for limiting the swivelling range of the chair, the driver plates connecting said front pivot axis to a main pivot axis (12), the main pivot axis comprising a longitudinal axis of a torsional spring (9), wherein;
the seat carrier, drive plates, torsion spring and back rest carrier are mounted as a system on a resilient seat support (4) and pivotable about a negative inclination pivot axis (10) of the resilient seat support, the negative inclination axis being in line with an upright tube (2) of the chair.
1 Assignment
0 Petitions
Accused Products
Abstract
A chair mechanism (1) for office chairs comprises a synchronous mechanism with integrated negative inclination. The aim is to achieve all sitting postures occurring during office work, and in particular the correction of injurious continuous sitting. The arrangement, the function and the connection of the pivot axes and the configuration of the seat support (4) within the chair mechanism (1) have predominant novelty value. Mechanical springs, which are less expensive than gas springs, are used as component parts. Springing during synchronous movement is effected by means of a torsion spring (9), while the negative inclination utilizes compression springs (21). The mechanism offers a number of options--locking in determined functions--for special applications. In addition to the wide movement range, the apparatus is distinguished by a compact and efficient construction.
-
Citations
8 Claims
-
1. A work chair mechanism providing for a swivelling range with stepless transition from a forwardly inclined position to a rearwardly inclined position based on the sitting posture and distribution of a user'"'"'s body, said mechanism comprising:
-
a seat carrier (7) pivoted at a front portion about a front pivot axis (13) and a rear portion about a rear pivot axis (11); a back rest carrier (8) in connection with the seat carrier about said rear pivot axis; and a plurality of driver plates (15) forming a recess (16) in which a stop is provided for limiting the swivelling range of the chair, the driver plates connecting said front pivot axis to a main pivot axis (12), the main pivot axis comprising a longitudinal axis of a torsional spring (9), wherein; the seat carrier, drive plates, torsion spring and back rest carrier are mounted as a system on a resilient seat support (4) and pivotable about a negative inclination pivot axis (10) of the resilient seat support, the negative inclination axis being in line with an upright tube (2) of the chair. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
Specification