Contact switch

• US 6,717,084 B1
• Filed: 04/28/2003
• Issued: 04/06/2004
• Est. Priority Date: 04/28/2003
• Status: Expired due to Fees

• Current Assignee: Zippy Technology Corporation
• Original Assignee: Zippy Technology Corporation
• Inventors: Lu, Wen-Hsiang
• Primary Examiner(s): Friedhofer, Michael A.
• Application Number:
  US10/424,124
• Time in Patent Office: 344 Days
• Field of Search: 200/402, 200/405, 200/445, 200/453, 200/454, 200/456, 200/457, 200/459, 200/461-464, 200/467
• US Class Current: 200/462
• CPC Class Codes: H01H 13/28 using compression or extension of coil springs

Abstract

A contact switch aims to reduce damages caused by electro-static discharge and facilitate depressing operation. It includes a casing which has a housing compartment for holding a first contact leg. The first contact leg has a first anchor flange and a second anchor flange projecting in the direction of a depressing opening. A micro mechanism is located at a lower position to increase the electro-static discharge. Due to the lower position of the micro mechanism, a retaining section may be formed by extension to space from the first anchor flange to form a depressing space so that a pushbutton may be moved therein without skewing to establish secured electric connection of the contact switch.

Claims

1. A contact switch, comprising:

a casing having a housing compartment and a depressing opening, the housing compartment having an opening covered by a lid, two slots and a retaining section extending from the depressing opening;

a first contact leg and a second contact leg located in the housing compartment that extend through the slots to form respectively a first fastening ledge and a second fastening ledge, the first contact leg having a first anchor flange and a second anchor flange projecting in the direction of the depressing opening, the first anchor flange having a support strut spaced from the retaining section to form a depressing space, the second anchor flange having an anchor portion; and

a micro mechanism including a pushbutton movable in the depressing space through the depressing opening, a contact plate which has one end pressing the support strut and another end forming an anchor member, and an elastic element which has two ends engaging respectively with the anchor portion of the second anchor flange and the anchor member of the contact plate and is depressible downward by the pushbutton to drive the contact plate to move about the support strut to connect the second contact leg to establish electric connection.

2. The contact switch of claim 1, wherein the casing and the lid have respectively an anchor hole and an anchor stub corresponding to and engageable with each other, and the lid further has a ridge to seal the depressing opening.

3. The contact switch of claim 1, wherein the second contact leg has an anchor section and the housing compartment has an anchor plate for holding the anchor section.

4. The contact switch of claim 1, wherein the casing has a bucking section corresponding to the contact plate in a free condition.