| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To simplify structure of a linear actuator. <P>SOLUTION: The projection amount variable type linear actuator has a cylindrical outer tube body 22, an inner tube body 23 inserted into the outer tube body 22, and a support 24 slidably supporting the outer tube body 22. A protrusion part 27 is formed on an inner circumference face of the outer tube body 22 or a guide grove 28 slidably guiding the protrusion part 27 is formed on an outer circumference face of the inner tube body 23. It is composed such that when either one of the inner tube body 23 or the outer tube body 22 is pushed in with respect to the support 24, the protrusion part 27 is engaged with a trailing edge of the guide groove 28, and one or the other of the inner tube body 23 or the outer tube body 22 is projected from the support 24. The guide groove 28 is plurally provided such that positions of trailing edges are different in the outer circumference face of the inner tube body 23, and by selecting any of a plurality of the guide grooves 28, a projection amount of the outer tube body 22 or the inner tube body 23 can be changed. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
