Plug with overload protection and a safety switch

• US 20070120640A1
• Filed: 11/28/2005
• Published: 05/31/2007
• Est. Priority Date: 11/28/2005
• Status: Abandoned Application

• Current Assignee: Han-Ming Lee
• Original Assignee: Han-Ming Lee
• Inventors: Lee, Han-Ming
• Application Number:
  US11/287,098
• Publication Number:
  US 20070120640A1
• Time in Patent Office: Days
• US Class Current: 337/37
• CPC Class Codes: H01H 73/303 with an insulating body insertable between the contacts when released by a bimetal element
• CPC Class Codes: H01R 13/665 with built-in electronic circuit H01R13/70, H01R13/719 take precedence
• CPC Class Codes: H01R 13/713 the switch being a safety switch

Abstract

The present invention provides a plug with overload protection and a safety switch. It is comprised of an upper case, a bottom case, two conductive polar plates, two connective plates, two alloy plates, a safety switch, and a return spring. The main features are as follows: the end of one conductive polar plate is joined with an alloy plate by mortise and tenon joint, while the other alloy plate, located on the rear end of the said plate, is joined with the front end of the connective plate by mortise and tenon joint. Then it will become electric connected. Also, the protruding insulating plate that on the bottom of the upper safety switch is just located on the top of the gap between the two alloy plates. When the circuit is short-circuited or overheated due to overload, the two alloy plates will be expanded and outstretched relatively to allow the return spring in the other end of the switch to push the insulating plate into the gap between the two alloy plates to cut the circuit between them with one of the features of the present invention, called the safety switch, which is equipped with automatic circuit breaker protection for the sake of safety.

Claims

1. A plug with overload protection and a safety switch. It is comprised of an upper case, a bottom case, two conductive polar plates, two connective plates, two alloy plates, a safety switch and a return spring. The main features are as follows:

There is a compartment in the center of the upper case with an arch-shape protection rim surrounding it, and the relative orientation holes in both sides of the said compartment, which allows the orientation bolt in both sides of the safety switch to be screwed and fixed. Among them, there is a protruding plate on the bottom front end of the safety switch. A return spring is put into the protruding post, which is located on the bottom rear end of the said safety switch. A conductive polar plate is located between the upper case and the bottom case, and an alloy plate is joined with the conductive polar plate by mortise and tenon joint. The other alloy plate, located on the rear end of the said alloy plate, is joined with the front end of the connective plate by mortise and tenon joint and becomes electric connected. The rear end of the connective plate is joined with another conductive polar plate by mortise and tenon joint while the rear end of the two connective plates is connected to the power cord (positive pole and negative pole).

By adopting the structure mentioned above, when the circuit is short-circuited or overheated due to overload, the two alloy plates will be expanded and outstretched relatively to allow the return spring in the other end of the switch to push the insulating plate into the gap between the two alloy plates to cut the circuit between them with one of the features of the present invention, called the safety switch, which is equipped with automatic circuit breaker protection for the sake of safety.

2. As mentioned in section 1 of the patent application claim, there is a wafer carrier equipped with multiple features. Among them, there are two protruding slide plates in the relative joint location of the two alloy plates that are upward and outstretched. It is designed to manually push the protruding insulating, which is located on the bottom of the safety switch, into the gap between the two alloy plates to cut the circuit between them.

3. As mentioned in section 1 of the patent application claim, there is a wafer carrier equipped with multiple features. Among them, the arch-shape protruding protection rim, surrounding the compartment, is a foolproof safety mechanism that prevents the safety switch from collision-induced damages under normal power supply.