| 摘要 |
<p>A wheel chair safety device (5) comprises a brake rod (51), a first rod (52), a second rod (53), a third rod (54), a fourth rod (60), an upper brake board (59), an upper brake wheel (58), a lower brake board (56), a parking wheel (55), an angle-adjustable fixing board (61) and a porous fixing board (57), wherein one end of the first rod (52), the second rod (53) and the third rod (54) are respectively hinged with the brake rod (51), another end of the first rod (52) and the second rod (53) are hinged with one end of the fourth rod (60), another end of the fourth rod (60) is hinged with the upper brake board (59), another end of the third rod (54) is hinged with the lower bake board (56), one end of upper board (59) is hinged with the angle-adjustable fixing board (61) or the porous fixing board (57) and another end is provided with an upper brake wheel (58), one end of the lower bake plate (56) is hinged with the angle-adjustable fixing board (61) or the porous fixing board (57), and another end is provided with the parking wheel (55), the upper brake wheel (58) and the parking wheel (55) act respectively on a tyre of the wheel chair.</p> |
