PUSHBUTTON SWITCH USING DOME SPRING AND SWITCH ELEMENT THEREOF

摘要

25307-158 A pushbutton switch comprising a switch element, utilizes a dome spring as a contactor and is arranged vertical to a bottom plate. The vertical movement of a key top and plunger combination is converted into a horizontal pressing action onto the dome spring via a coil spring and lever. This structure provides a small switch with a good tactile feeling at snap action for the operator. The invention also discloses related improvements for a dome spring having a rectangular shape, a coupling method between the plunger and key top, a noise absorbing plunger design, and a forcible drive mechanism onto the lever end for abnormal conditions. Other improvements related to the switch element are also disclosed so as to provide flexibility or elasticity for the inner contact structure thereof, and to fabricate outer and inner contacts, lead terminals and their connecting wires from a continuous metal sheet to simplify the manufacturing processes. 85G0l043/T149