Electricity: circuit makers and breakers – Solid contact – Rocking actuator
Reexamination Certificate
2000-07-28
2001-11-27
Bradley, Paula (Department: 2832)
Electricity: circuit makers and breakers
Solid contact
Rocking actuator
C337S066000
Reexamination Certificate
active
06323450
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates generally to a switch assembly, and more particularly, to a switch assembly, which is implemented for ON/OFF control by taking advantage of a protuberance of a switch knob that directly depresses or releases a contact control member to thereby oppress or release a resilient contact piece to effect or cut off the power supply.
2. Description of the Prior Art
Power switch is a widely used electronic component for ON/OFF control of a power supply, and is highlighted in its structural complexity in consideration of cost, or furthermore, in its reliability of security.
For improvement of a switch assembly, many patents, such as U.S. Pat. Nos. 4,167,720, 4,937,548, 5,223,813, 5,451,729, 5,558,211, etc., have been disclosed, wherein a common defect is known as excessive elements being used down from a switch knob that results in a complicated interactive process with high breakdown ratio and fabrication cost.
For example, in the U.S. Pat. No. 5,223,813 shown in FIGS. 1, 2, 3, after a switch knob has been depressed, a link rod under the switch knob is driven to drive a sway component to oppress or release a resilient contact piece thereunder to enable an upper contact dot to depart from or contact with a lower contact dot to thereby effect or cut off a power supply. It can be operated all right under normal conditions, however, in consideration of cost, productivity, and blunt response, there are still rooms for further improvements.
SUMMARY OF THE INVENTION
The primary object of this invention is to provide a switch assembly for improvement of assembling work, production cost, response time, and breakdown ratio.
Another object of this invention is to pair a thermal-sensitive element with a tact control member so as to ensure security in case of overload or overheat.
For more detailed information regarding this invention together with further advantages or features thereof, at least an example of preferred embodiment will be elucidated below with reference to the annexed drawings.
REFERENCES:
patent: 4167720 (1979-09-01), Krasser
patent: 4937548 (1990-06-01), Sdunek
patent: 5223813 (1993-06-01), Cambreleng et al.
patent: 5451729 (1995-09-01), Onderka et al.
patent: 5558211 (1996-09-01), Heydner et al.
Bradley Paula
Nguyen Nhung
Yu Tsung-Mou
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