| 摘要 |
PCT No. PCT/SE96/01089 Sec. 371 Date May 5, 1997 Sec. 102(e) Date May 5, 1997 PCT Filed Sep. 3, 1996 PCT Pub. No. WO97/09023 PCT Pub. Date Mar. 13, 1997The invention relates to a braking device for wheeled chairs, the device (1) including at least two brake legs (2, 3) which can be lowered to, or raised from a substructure while being positionally movement-oriented with the aid of tubular members (4, 5) fixed to the chair frame, these vertical leg movements being actuable via urging structure (6, 7) situated above the respective brake leg for performing a turning movement with the aid of a shaft (8), to which they are fixed, this movement resulting in one direction in arresting the chair moving the legs (2, 3) downwards into their braking position, and in the opposite direction in upward movement of the legs into their inactive position. The urging structure comprise cams (9; 10) having their turning axis (11) coincident with the longitudinal axis of the shaft (8) to which they are fixed, their profiles (12; 13) having an elongate S-shape, and coact with the upper parts (16, 17) of the legs for obtaining maximum lifting height of the leg free ends (14, 15) from the substructure. |
