Electric soldering iron with heating energy regulating control means
OwnerCheng-Liang Leeinventor
Life of this patent
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Abstract
An electric soldering iron includes a perforated metal barrel having a front end and a rear end, a soldering tip axially extended from the front end of the soldering tip, a handle having a front end and a rear end, a connector connected between the rear end of the perforated metal barrel and the front end of the handle, a power cord extended out of the rear end of the handle, an electric heater installed in the perforated barrel and connected between the soldering tip and the power cord, an integrated control circuit installed in the handle for heating energy regulating control, a multi-step control switch mounted on the handle and connected to the integrated control circuit, and a LCD provided at the handle to display values selected through the multi-step control switch.
Claims5
An electric soldering iron, comprising:
- a perforated metal barrel having a front end and a rear end, a soldering tip axially extended from the front end of said soldering tip, a handle having a front end and a rear end, a connector connected between the rear end of said perforated metal barrel and the front end of said handle, a power cord extended out of the rear end of said handle, an application specific integrated control circuit installed in said handle for heating power control, a single-key, multi-step control switch mounted on the periphery of said handle and connected to said integrated control circuit in said handle, and an LCD (liquid crystal display) provided at the periphery of said handle to display values selected through said multi-step control switch, said integrated control circuit being comprised of a power supply circuit, a zero-crossing detecting circuit for outputting a power supply waveform zero-crossing signal, a triggering pulse signal generating circuit for synthesizing the zero-crossing signal with a time pulse signal into a thyristor triggering pulse signal, a thyristor driving and control circuit for combining the triggering pulse signal and a power ratio signal in order to drive the thyristor, a time pulse oscillatory circuit for outputting the time pulse signal, a power ratio selecting circuit for providing control states representing various power ratios, a power ratio synthesizing circuit for synthesizing the power ratio signal using the control states and a ratio type signal, a power ratio type selector for selecting a power ratio calculation method and outputting the ratio type signal, a power ratio control circuit for selecting a power ratio based upon input from the control switch, a heater energy selecting circuit for providing a selected power level signal to a display decoder circuit for decoding the selected power level signal and the control state into data for an LCD driver showing the power level, and a initialization circuit.
Dependencies are inferred from the claim text.