Switch module

• US 8,643,462 B2
• Filed: 11/05/2010
• Issued: 02/04/2014
• Est. Priority Date: 09/17/2010
• Status: Active Grant

• Current Assignee: Powertech Industrial Company Limited
• Original Assignee: Powertech Industrial Company Limited
• Inventors: Lee, Yu-Lung, Hsu, Jung-Hui
• Primary Examiner(s): THOMAS, BRADLEY H
• Application Number:
  US12/940,200
• Publication Number:
  US 20120067708A1
• Time in Patent Office: 1,187 Days
• Field of Search: 337/14, 337/34, 337/52, 338/20, 338/21, 200/332
• US Class Current: 337/14
• CPC Class Codes: H01H 71/18 with expanding rod, strip, or wire

Abstract

A switch module applied for a power supply system is disclosed. The switch module comprises a power switch, an insulating member, a surge absorber and a pyrocondensation belt. The power switch is connected with the power supply system, the insulating member is set on the power switch, the surge absorber is electrically connected with the power switch and adjacent to the power switch, the pyrocondensation belt is connected with the surge absorber and the insulating member. The pyrocondensation belt shrinks with a temperature of the surge absorber. When the insulating member is in the initial state, the insulating member does not affect the power switch. The insulating member makes the power switch off when the shrinkage degree of the pyrocondensation belt develops enough to block the power switch from being on.

Claims

1. A switch module, applied for a power supply system, comprising:

a power switch being connected to the power supply system;

an insulating member being set on the power switch, the insulating member having a push-pull portion and an extension portion;

a surge absorber being electrically connected to the power switch and adjacent to the power switch; and

a pyrocondensation belt connecting the surge absorber and the push-pull portion of the insulating member,

wherein the pyrocondensation belt is shrinkable in response to an increasing in temperature of the surge absorber for moving the insulating member;

wherein the insulating member does not affect the power switch when the insulating member is in an initial state; and

wherein the push-pull portion carries the extension portion to move in response to a force generated by the shrinkage of the pyrocondensation belt, thereby turning off the power switch.

2. The switch module as in claim 1, wherein the power switch is a rocker switch or a push switch.

3. The switch module as in claim 1, wherein the pyrocondensation belt is a pyrocondensation sleeve.

4. The switch module as in claim 1, wherein the power switch includes:

a casing;

a first conductive member inserting into the casing;

a second conductive member inserting into the casing; and

an operation portion detachably disposed on the casing in order to alternate electrical connection and electrical disconnection between the first and second conductive members.

5. The switch module as in claim 4, wherein the push-pull portion is disposed outside the casing of the power switch while the extension portion is arranged inside the casing of the power switch;

the extension portion is adjacent to the first and second conductive members.

6. The switch module as in claim 5, wherein the pyrocondensation belt surrounds the push-pull portion and the surge absorber.

7. The switch module as in claim 5, wherein the pyrocondensation belt surrounds the power switch, the push-pull portion and the surge absorber.

8. The switch module as in claim 1, wherein the pyrocondensation belt varies with a predetermined shrinkage rate while the pyrocondensation belt is in an operating temperature range;

the maximum temperature in the operating temperature range is the critical temperature of the surge absorber, at which temperature the surge absorber fails.

9. A switch module, applied for a power supply system, comprising:

a power switch being connected to the power supply system;

an insulating member being set on the power switch, the insulating member having a push-pull portion and an extension portion;

a surge absorber being electrically connected with the power switch and adjacent to the power switch; and

a pyrocondensation sleeve being sleeved onto an exterior periphery of the surge absorber and being connected to the push-pull portion of the insulating member;

wherein the pyrocondensation sleeve is shrinkable in response to an increasing in temperature of the surge absorber for moving the insulating member;

wherein the insulating member does not affect the power switch when the insulating member is in an initial state; and

wherein the push-pull portion carries the extension portion to move in response to a force generated by the shrinkage of the pyrocondensation sleeve, thereby turning off the power switch.

10. The switch module as in claim 9, wherein the pyrocondensation sleeve varies with a predetermined shrinkage rate while the pyrocondensation sleeve is in an operating temperature range;

the maximum temperature in the operating temperature range is the critical temperature of the surge absorber, at which temperature the surge absorber fails.

11. A switch module, applied for a power supply system, comprising:

a power switch being connected to the power supply system;

an insulating member being set on the power switch, the insulating member having a push-pull portion and an extension portion;

a surge absorber being electrically connected with the power switch and adjacent to the power switch; and

a pyrocondensation sleeve being sleeved onto the surge absorber, the power switch, and the push-pull portion of the insulating member;

wherein the pyrocondensation sleeve is shrinkable in response to an increasing in temperature of the surge absorber for moving the insulating member;

wherein the insulating member does not affect the power switch when the insulating member is in an initial state; and

wherein the push-pull portion carries the extension portion to move in response to a force generated by the shrinkage of the pyrocondensation sleeve, thereby turning off the power switch.

12. The switch module as in claim 11, wherein the pyrocondensation sleeve varies with a predetermined shrinkage rate while the pyrocondensation sleeve is in an operating temperature range;

the maximum temperature in the operating temperature range is the critical temperature of the surge absorber, at which temperature the surge absorber fails.