Patent ID: 6111222
Filing Date: 2000-08-29
Classification: B23K

Abstract:
A soldering apparatus with a safety device, comprising:a soldering iron equipped with an electrically heated type heater;a temperature sensor for sensing a temperature of a tip portion of said soldering iron;a vibration sensor attached to said soldering iron for sensing vibrations of said soldering iron at the use of said soldering iron; anda controller for controlling a temperature of said soldering iron,wherein said controller includes a heater control circuit for controlling said heater and a vibration detection circuit for receiving a signal from said vibration sensor to perform switching among a plurality of control modes said heater control circuit performs, andsaid heater control circuit is adapted to provide said plurality of control modes through the switching operation, with said plurality of control modes including a high-temperature mode to maintain a temperature of said tip portion of said soldering iron at a high temperature meeting a soldering requirement, a low-temperature mode to maintain said iron tip portion temperature at a low temperature lower then said high temperature meeting said soldering requirements, and apower-off mode to turn off said heater, andsaid vibration detection circuit causes said heater control circuit to enable said high-temperature mode while a vibration no-detection time for which said vibration sensor does not sense the vibrations of said soldering iron continuously does not exceed a first set time, and causes said heater control circuit to switch to said low-temperature mode when said vibration no-detection time exceeds said first set time, and further causes said heater control circuit to switch to said power-off mode when said vibration no-detection time exceeds a second set time, andwherein said heater control circuit is provided with a mode cancellation switch so that, when said heater control circuit is in said low-temperature mode and if said mode cancellation switch is pressed or if said vibration sensor senses the vibrations of said soldering iron, said low temperature mode is canceled, while, when said heater control circuit is in said power-off mode, the cancellation of said power-off mode is effected only by the pressing of said mode cancellation switch.