Locking device for shaving head

Claim 1

In an electric shaver including a housing and a shaving head mounted on said housing and removable in a first axial direction, the improvement in combination therewith of locking means for releasably locking said shaving head onto said housing and for dis-engaging said shaving head from said housing comprising: a pin and first spring means carried by said housing and movable in a second axial direction transversely of said first axis, said first spring means biasing the pin to move from its release position to its locking position, said shaving head having a recess receiving said pin in the locking position thereof thereby locking said shaving head onto said housing, a push-button carried by said housing and movable similarly as said pin, said push-button depressible to its release position for driving said pin to its release position thereby releasing said shaving head, said locking means further comprising a rod and second spring means carried by said button said second spring means biasing said rod to move in said first axial direction from its recessed position to its extended position, said housing having a wall portion adjacent said rod, said rod in its extended position urging said shaving head axially off said housing, and engaging said wall portion which prevents said rod, the button carrying the rod, and the pin from movement in said second axial direction to the locking positions thereof, said shaving head when remounted on said housing driving said rod axially back to its recessed position, thus releasing said rod, button and pin to return to their locking positions, said pin thus engaging said recess in said shaving head.