Patent ID: 9145726
Filing Date: 2015-09-29
Classification: E05F,E05Y,Y10T

Abstract:
1. A concealed door closer comprising a housing, an input shaft and an output shaft, the input shaft being connected to a motor, wherein a joining member is arranged between the input shaft and the output shaft, a first end of two ends of the joining member is provided with a first upper connection piece and a first lower connection piece, a second end of two ends of the joining member is provided with a second upper connection piece and a second lower connection piece, the first upper connection piece and the first lower connection piece are connected to a first roller via a first vertical rotation shaft, and the second upper connection piece and the second lower connection piece are connected to a second roller via a second vertical rotation shaft; the input shaft is provided with a first left connection piece and a first right connection piece, and the first left connection piece and the first right connection piece are horizontally connected to the first roller via a first horizontal rotation shaft; and the output shaft is provided with a second left connection piece and a second right connection piece, and the second left connection piece and the second right connection piece are horizontally connected to the second roller via a second horizontal rotation shaft.