| 摘要 |
A push button switch includes: a support structure of a generally box-like shape, defining an internal space, the support structure having at least an opening communicating with the internal space and an opening axis, the opening being defined by an internal opening edge; an actuation mechanism having a push button and a mechanical coupling arrangement for connecting the push button to the support structure, the mechanical coupling arrangement having a guiding arrangement for the push button to traverse with respect to the support structure in a direction generally parallel to the opening axis; a key which is fixable to the push button for manually actuating the push button; and an anti-jamming protection device having a protective plug interposable between the key and push button and being appliable onto the support structure for interacting with the internal edge, to protect the guiding arrangement from undesired intrusion by dust particles and such. |
