Adjusting mechanism for adjusting a restoring force that acts on a backrest of a chair, and office chair with such an adjusting mechanism
US8528973B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2012 |
| Grant date | Sep 10, 2013 |
| Priority date | — |
| Expiry date | Oct 15, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C1/03272
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
An adjusting mechanism is used to adjust a restoring force that acts on a backrest of a chair. The adjusting mechanism has a spring element for creating the restoring force, a support, and a backrest support that is pivotably mounted about a support axis on the support. An adjusting element configured as a pair of scissors containing a first scissor arm and a second scissor arm is provided, and the scissor arms are rotatably connected to each other about a scissor axis. The first scissor arm is pivotably mounted on the backrest support about an adjusting axis. A spring force produced by the spring element acts on the second scissor arm. A first actuating lever length is defined between the support axis and the scissor axis. The lever length is changeable using an adjusting element for adjusting the restoring force by pivoting the adjusting element about the adjusting axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.