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Pushbutton-switch-assembly

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Pushbutton switch assembly

Details

Inventors: Kopish, Stephen P.; Costantino, Richard;
Assignee: Motorola, Inc. (Schaumburg, IL)
Primary Examiner: Shepperd; John W.
Assistant Examiner:
Attorney, Agent or Firm: Melamed; Phillip H., Pristelski; James S., Gillman; James W.

A pushbutton switch assembly having a hand-insertable snap-in subassembly comprising the switch chassis and the switch actuator is disclosed. Dome switch electric contacts are contained within a chassis having a plastic wall with a through opening therein. The chassis has a pair of integral flexible retaining tangs projecting into the through opening. A plastic switch actuator having recesses thereon is hand-inserted into the through opening, and the flexible tangs and recesses cooperate to provide a snap-in subassembly. The flexible retaining tangs bias the actuator into a first predetermined position in which an actuating plunger on the actuator is maintained out of contact with the electrical dome switch contacts. The flexible tangs permit inward movement of the switch actuator into the opening such that the actuating plunger can contact and actuate the dome switch electrical contacts. Stop projections are provided on the switch actuator which cooperate with guide channels and end mating surfaces in the chassis wall to limit the amount of inward movement of the switch actuator while also guiding the actuator movement.

DETAILED DESCRIPTION An object of the present invention is to provide an improved electrical switch assembly which overcomes the aforementioned deficiencies.
A more particular object of the present invention is to provide an electrical switch assembly having a snap-in hand-insertable subassembly comprising the switch actuator and housing, and which does not require separate biasing means for the switch actuator or separate stop mechanisms to limit the movement of the switch actuator.
In one embodiment of the present invention an electrical switch assembly is provided.
The switch assembly comprises a chassis means for housing the electrical contacts of a switch, said chassis having a wall with at least one through opening therein; switch actuator means mounted in said chassis wall opening, said switch actuator being attached to said chassis by flexible retaining means fixed to one of said chassis wall and said switch actuator means and cooperating with the other of said chassis wall and said switch actuator means to form a hand-insertable snap-in subassembly, said flexible retaining means, besides attaching said switch actuator means to said chassis, also biasing said switch actuator means into a first predetermined position with respect to said chassis wall and permitting movement of said actuator means into a second predetermined position with respect to said wall while keeping said actuator means attached to said chassis; and electrical contact means mounted inside said chassis, said actuator means selectively altering the electrical characteristics produced by said contact means in response to said actuator means moving from said first to second positions.
Basically, a pushbutton electrical switch assembly is provided in which the moveable manual actuator is mounted in an opening in a plastic chassis.
The manual actuator is held in position in the chassis opening by flexible retaining tangs which are integral with the chassis and co-act with recesses in the manual actuator to form a hand-insertable snap-in subassembly comprising the actuator and chassis

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