Back rocker locking mechanism for swivel chair chassis

Abstract

The invention discloses a chair back and rocker locking mechanism for a chassis of a swivel chair. The chair back and rocker locking mechanism comprises a locking plate, a torsion spring a, a bolt and a bolt seat, wherein a row of locking holes are formed in the locking plate, the locking plate is fixedly connected with a fourth pin shaft and performs synchronous motion along with the fourth pin shaft under the action of a rocker, the fourth pin shaft is a whole long shaft, the bolt seat is arranged beside the locking plate, the bolt seat is fixedly connected with a base of a chassis, the bolt is penetrated and inserted into the bolt seat in a sliding manner and matched with the locking holes, a first spring arm of the torsion spring a is connected with the bolt, and a second spring arm of the torsion spring a is connected to a driving device for driving the torsion spring a to rotate back and forth. The chair back and rocker locking mechanism disclosed by the invention is provided with the locking plate and the bolt, and the bolt can realize dialing according to the rotation of the torsion spring, thereby achieving the purpose that the bolt is inserted into or withdrawn from the locking holes; the locking of the rocker is realized by matching the bolt with the locking plate, thereby facilitating the control.

Description

technical field [0001] The invention relates to the technical field of swivel chairs and office chairs, in particular to a seat back rocker locking mechanism for a swivel chair chassis. Background technique [0002] The swivel chair chassis, also known as the swivel chair tray, is an important part installed under the seat cushion of the swivel chair. The lifting of the seat cushion and the adjustment of the tilt angle of the backrest are all done by the chassis. [0003] The current swivel chair tray is generally composed of an upper tray, a lower joist, a rotating shaft, and a spring device. After the upper turntable is fixed to the back of the swivel chair seat, the swivel chair can be properly tilted around the rotating shaft and can be actively restored. There is comfort. For example, a Chinese patent discloses a tray (patent number: 02287885.8), which mainly includes a bottom plate, a movable seat, a tapered tube and an adjustment device. , the tapered tube fixing pl...

AI Technical Summary

Problems solved by technology

However, when sitting on the seat installed with the above-mentioned tray and leaning backward, since the gravity of the human body is supported by the backrest and the specific gravity gradually increases, the gravity loaded on the seat surface gradually decreases, and the restoring force transmitted from the gravity to the backrest changes accordingly. Small, resulting in insufficient backrest recovery force at the maximum recline angle, unable to achieve the best recovery force

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