Patent ID: 7561401
Filing Date: 2009-07-14
Classification: H05B

Abstract:
1. A protector for providing protection against instantaneous current for a driving circuit of an electric device comprising a driving device and a voltage stabilizing device, wherein, such driving device has a sealed tube installed with two spring plates normally contacting each other, wherein one spring plate is provided with a semiconductor chip on one side and is connected to an electric resistant wire, and said two spring plates are connected respectively to electric conductive wires outside the sealed tube; said voltage stabilizing device also has a sealed tube filled with a gas or gaseous composition and is installed with two conductive plates opposite to each other, and said two conductive plates are respectively connected to electric conductive wires outside the sealed tube, and wherein one electric conductive wire of said driving device is connected to that of the voltage stabilizing device, such that the driving device is serially connected to the voltage stabilizing device; and when the protector is connected to a driving circuit of an electric device, after the switch of a power source is turned on, a current of high voltage of the power source flows into the voltage stabilizing device, and the two conductive plates installed inside the sealed tube of said voltage stabilizing device are electrically conducted due to the function of the gas filled in the sealed tube of said voltage stabilizing device, and the current flows into said driving device, and said spring plate having the semiconductor chip is then instantly separated from the other spring plate for a very short time and then returns back to contact together with said another spring plate, so as to trigger the electric device(s), and meanwhile, the extra current of the power source is consumed in said electric resistant wire, such that the surge current instantly generated from the power source is consumed, and damage to the electric device due to the surge current is prevented.