Patent ID: 9585477
Date: 2017-03-07
CPC Classifications: A47C

Claim:
1. A movable backrest for an adjustable chair, comprising: a backrest assembly; a first backrest support; a first backrest connector; a second backrest support; a second backrest connector; and a backrest guiding apparatus; wherein the backrest assembly is connected to the first backrest support through a first shaft, the backrest assembly is connected to the backrest guiding apparatus through a seventh shaft, the first backrest support is connected to the first backrest connector through a second shaft, the backrest guiding apparatus is connected to the first backrest connector through a sixth shaft, the second backrest support is connected to the first backrest connector through a third shaft, the second backrest connector is connected to the backrest guiding apparatus through a fifth shaft, and the second backrest support through a connection with a fourth shaft forms a cross with the second backrest connector, wherein the third shaft is disposed at a first end of the first backrest connector, the sixth shaft is disposed at a second end of the first backrest connector, the second end being opposite the first end, and the second shaft is disposed between the third shaft and the sixth shaft.