| 摘要 |
A gravity self-adapted chassis of chair has the first plug pin, second plug pin, third plug pin, forth plug pin, tilting plate, first connecting rod, and the second connecting rod of the chassis form into a four-point connecting rod mechanism so as to form the conduction of the force, the backrest is fixedly connected with the tilting plate to offer the driving force of the four-point connecting rod mechanism, the gravity applied onto the seat by the users forms into the reset force applied onto the four-point connecting rod mechanism through the third plug pin hinged with the bracket, and the driving force and the reset force of the four-point connecting rod mechanism form into the confrontation relationship. |
| 主权项 |
1. A chassis of a swivel chair, characterized by comprising: a base connected with an air rod, a bracket used for fixing a seat and a tilting plate connected with the backrest, wherein the bracket is arranged within the base, the tilting plate is arranged within the bracket, the middle of the tilting plate is provided with a first pin shaft which is taken as the rotating fulcrum thereof, the first pin shaft penetrates through the bracket and is connected with the base, a first connecting rod and a second connecting rod are symmetrically arranged at two sides at the front part of the tilting plate, one end of the first connecting rod is hinged with the front end of the tilting plate through a fourth pin shaft, the other end of the first connecting rod is hinged with one end of the second rod through a third pin shaft, the third pin shaft is connected with the bracket, the other end of the second connecting rod is provided with a second pin shaft in a penetrating way, the second pin shaft is connected with the base after penetrating though or avoiding the bracket, track grooves which are matched with the first pin shaft and used for guiding the motion trail of the bracket are symmetrically arranged at two sides of the bracket, the first pin shaft is arranged within the track grooves in a penetrating way, and the chassis further comprises an elastic reset device which leads the bracket to be capable of resetting after the bracket is titled by the tilting plate to move. |
