Patent ID: 11927058
Assignee: SYNCPROTO CO., LTD.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 18:
19. The blind lifting device as claimed in claim 18, wherein said rotary seat of said rotating support module further has a tubular portion which extends horizontally from said axle connecting portion toward said blind lifting control module to spacedly surround said support axle and which has a diameter smaller than that of said axle connecting portion, said support axle having an axle body and at least one frictional ring, said axle body having a secured end portion which is secured to said mounting wall, and a free end portion which is opposite to said secured end portion and exposed from said rotary seat, said frictional ring surrounding said free end portion, said rotating support module further including a speed-reducing sleeve and a coil member, said speed-reducing sleeve having a sleeve body which is sleeved on said free end portion, and a plurality of elastic plates which are arranged around said axle body and which extend from said sleeve body toward said rotary seat and have terminate ends interposed between said tubular portion and said axle body, said coil member being sleeved around said speed-reducing sleeve and having two ends which are respectively secured to said rotary seat and said sleeve body such that, during rotation of said horizontal axle to lower the blind, said speed-reducing sleeve is in frictional contact with said frictional ring to have a rotational speed slower than that of said rotary seat, and to shrink said coil member to compress said elastic plates toward said axle body so as to reduce the rotational speed of said rotary seat.