| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To solve such problems in a conventional human-powered four-wheel vehicle using a caster that a one-directional rotation stopper of the caster requires manufacture of dedicated parts, increasing the cost, and a structure of the dedicated parts such as a ratchet mechanism, adopted by a hand tool, causes a noise problem when they rotate, to enable people who do not much strength such as the elderly and children to easily operate it, and to achieve quiet operation. <P>SOLUTION: The human-powered four-wheel vehicle equipped with right and left front casters 4b, 4a in a rotatable front frame 2, using an advancing caster by moving a steering wheel back and forth includes a one-way bearing in axle receivers of the right and left front casters, respectively. Further, a footrest is formed at both right and left ends of the front frame. Accordingly, the vehicle can be inexpensively manufactured. Since the feeling of operation is so light that the elderly or children can use it or people handicapped in the limbs can use it for rehabilitation training. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
