Patent ID: 6880989
Filing Date: 2005-04-19
Classification: G03B

Abstract:
1. A push button switch comprising: a push button positioned on a switch base to be supported thereby in a manner to prevent said push button from coming off said switch base; a biasing member positioned between said push button and said switch base at a substantially center of said push button to bias said push button in a direction away from said switch base; a switching element having a press portion, said switching element being provided at a position offset from an axis of said push button; a press projection and a rocking projection which are formed on said push button on opposite sides of said center thereof, respectively, said press projection projecting to be associated with said press portion of said switching element; and a fulcrum formed on said switch base to be associated with said rocking projection, wherein said rocking projection and said fulcrum are disengaged from each other when said push button is in a non-depressed position, wherein said rocking projection comes into contact with said fulcrum when said push button is half depressed, and wherein said push button turns about said fulcrum when said push button is further depressed following said half depression of said push button.