| 摘要 |
PROBLEM TO BE SOLVED: To provide a push down parts of which, a repulsive force when pushed down, a magnitude of push down force, and a dependence of the position of the push down switch can be easily adjusted. SOLUTION: For the push down parts, a switch 5 and a push down button 3, having a push down force adjusting mechanism, are mounted on an electric base board 7, and a body of equipment 6 is arranged so as to surround the side part and the lower part of the push down button 3. A spring-attenuation mechanism 9, composed of an attenuation mechanism part 1 and a spring 4, is arranged between a circular plate part 3a of the push down button 3 and the body of equipment 6 so as to surround an axis part 3b. The attenuation mechanism part 1, composed of a lid plate 1a made of metal, a bottom plate 1b made of metal, and a side part 1c made of soft material like vinyl put between the lid plate 1a and the bottom plate 1b, is arranged between the body of equipment 6 and the spring 4, and electric viscose fluid 8, changing its viscosity by the electric field applied from outside, is filled in the attenuation mechanism part 1. An electric field control part 2 applying electric field to the electric viscose fluid 8 is installed.
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