| 摘要 |
<p>PURPOSE:To provide a joy stick which prolong the service life and reduce the cost by connecting an oscillated handle and a removing member which revolves according to its oscillating angle to each other, and controlling a hydraulic valve according to the output of an optical sensor which operates together with a slit provided at the edge of the revolving member. CONSTITUTION:A revolving member 2 which is installed at a base 1 to be revolved by a handle 5 is formed of a large diameter shaft-like revolving member 2a provided orthogonally to a small diameter shaft-like revolving member 2b. Namely, a cut part 6 whose shaft diameter is decreasing, and a slot 7 are formed in the orthogonal part of the small diameter revolving member 2b, and a slot 8 is formed in the orthogonal part of a large diameter revolving member 2a to insert the lower end part of the handle 5 in the slots 7, 8. Besides, a space 11 which accommodates a light emitting element 10 fixed to the base 1 is formed in one end of each of the revolving members 2a, 2b, and a slit 12 which corresponds to the space 11 is formed at the end. An electrically- controlled hydraulic valve is driven according to the output of an optical sensor 15 which receives the light from the light emitting element 10 through the slit 12.</p> |
