Patent ID: 8698026
Filing Date: 2014-04-15
Classification: H01H

Abstract:
1. A push button switch, comprising: a support structure having 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, wherein the opening is 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, wherein the mechanical coupling arrangement includes a guiding arrangement for allowing the push button to traverse with respect to the support structure in a direction generally parallel to the opening axis; and a key which is fixable to the push button for manually actuating the push button; wherein the switch includes an anti-jamming protection device having a protective plug, which is to be interposed between the key and the push button and which is appliable onto the support structure for interacting with the internal edge so as to protect the guiding arrangement from undesired intrusion by dust particles and other similar particle, wherein the guiding arrangement includes a retaining and guiding frame for the push button, which is fixable to the support structure and which is interposable between the push button and the structure, wherein the retaining and guiding frame is completely received in the internal space, and wherein the protective plug has at least an opening, through which the fixing arrangement may pass, which is provided for fixing the key to the push button.