Preloaded spring arrangement, in particular for spring loading office chair synchronizing mechanisms
First Claim
1. A preloaded spring arrangement, in particular for spring loading office chair synchronizing mechanisms, comprising a pair of leg springs (28), which are coaxially positioned on a common axis (9), each having a supporting leg (29) and a positioning leg (31);
- and a preferably manually operated adjusting unit (32) of A type of an eccentric, which the two positioning legs (31) are coupled with and by which they are displaceable for adjustment of a preload of the spring arrangement (F);
wherein, for stepwise locked spring load adjustment, the eccentric adjusting unit (32) comprises an eccentric arrangement having a pair of eccentric cams (40;
41) sitting axially side by side, cam surfaces (42) of which, related to a direction of rotation of the eccentric arrangement, successively comprise plane locking sections (43, 47, 50, 53), eccentric cam control sections (44, 48, 51) and holding sections (45, 49, 52) that are concentric of the axis of rotation of the eccentric arrangement; and
the respective locking, cam control and holding sections (43, 47, 50, 53;
44, 48, 51;
45, 49, 52) of the two eccentric cams (40;
41) are offset in the direction of rotation of the eccentric arrangement.
1 Assignment
0 Petitions
Accused Products
Abstract
A preloaded spring arrangement, in particular for spring loading office chair synchronizing mechanisms, comprises a pair of leg springs, which are coaxially positioned on a common axis, each having a supporting leg and a positioning leg; and a preferably manually operated adjusting unit of the type of an eccentric, which the two positioning legs are coupled with and by which they are displaceable for adjustment of the preload of the spring arrangement; wherein, for stepwise locked spring load adjustment, the adjusting unit of the type of an eccentric comprises a pair of eccentric cams sitting axially side by side, the cam surfaces of which, related to the direction of rotation of the eccentric arrangement, successively comprise plane locking sections, eccentric cam control sections and holding sections that are concentric of the axis of rotation of the eccentric arrangement; and wherein the respective locking, cam control and holding sections of the two eccentric cams are offset in the direction of rotation of the eccentric arrangement.
36 Citations
7 Claims
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1. A preloaded spring arrangement, in particular for spring loading office chair synchronizing mechanisms, comprising
a pair of leg springs (28), which are coaxially positioned on a common axis (9), each having a supporting leg (29) and a positioning leg (31); - and
a preferably manually operated adjusting unit (32) of A type of an eccentric, which the two positioning legs (31) are coupled with and by which they are displaceable for adjustment of a preload of the spring arrangement (F);
wherein, for stepwise locked spring load adjustment, the eccentric adjusting unit (32) comprises an eccentric arrangement having a pair of eccentric cams (40;
41) sitting axially side by side, cam surfaces (42) of which, related to a direction of rotation of the eccentric arrangement, successively comprise plane locking sections (43, 47, 50, 53), eccentric cam control sections (44, 48, 51) and holding sections (45, 49, 52) that are concentric of the axis of rotation of the eccentric arrangement; and
the respective locking, cam control and holding sections (43, 47, 50, 53;
44, 48, 51;
45, 49, 52) of the two eccentric cams (40;
41) are offset in the direction of rotation of the eccentric arrangement. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- and
Specification