Tripping emergency push-button

An emergency push-button with a safe actuation, comprising a fixed housing;

• a knob movable along an axis thereof upon actuation of the knob;
• retaining and releasing means positioned in said housing for said axially movable knob;
• a slider support rigidly connected to said knob and being spring-biased in said housing, said retaining and releasing means including a member movable in an axial direction of said knob by axial sliding of said slider support as said knob is actuated and being adapted to rotate about an axis parallel to a direction of actuation of said knob, said retaining and releasing means further including a plurality of retaining members provided on said movable member, and a plurality of protrusions provided on said housing, said retaining members cooperating with said protrusions as said movable member rotates such that said retaining members move in a direction of rotation of said movable member and subsequently abut under respective protrusions, said retaining members being unlatcheable from said protrusions through a subsequent rotation of said movable member and a movement of said retaining members around said protrusions;
• and means effecting a rotational movement of said movable member as said movable member is axially moved, said movable member including a stem extending into said slider support;
• said rotational movement effecting means including cam means formed within said stem, and a pin provided in said slider support and movable therealong and extending transversely of said axis, said pin being engaged in and cooperating with said cam means to cause rotation and a tripping action of said movable member resulting in engagement of said retaining members with or disengagement of said retaining members from said protrusions, respectively.