Self-holding type push switch with heart type cam

Claim 1

A self-holding type push switch with heart shaped cam, comprising: a switch case, a slider means movably disposed in the switch case, and an engaging means limiting relative movement of the switch case and the slider; said switch case defining an enclosure and having contact pieces therein for receiving said slider means and having rceptacle grooves for receiving said engaging means, the engaging means operative to alternately hold said slider means in specified inner and outer positions within the switch case; said engaging means comprising a hook rod bent at both ends thereof to form a C-shape, and a spring plate member adapted to support said hook rod, said spring plate member having a pivot hole for pivotally carrying one end of said hook rod, and a slit for movably carrying the other end of said hook rod, the spring plate having a body and a bent-over piece adapted to press and hold said hook rod between the bent-over piece and the body of the spring plate; said slider means having a heart-shaped cam having a recess and conductive contact pieces, the slider being resiliently urged outwardly by a spring member in said switch case, said slider means being adapted to bring said hook rod into engagement with the recess of said cam when the slider means is once depressed, thereby holding the slider in position and, when again depressed, to disengage said hook rod from the recess of said cam, whereby said slider means effects changeover of connection between said contact pieces.