COMPOSITE THERMISTOR PART AND DEMAGNETIZER USING THE SAME PART

摘要

PURPOSE:To prevent the temperature rise of printed board, to improve the reliability of a demagnetizer and to lower power consumption by bringing the temperature of a common terminal functioning as each one electrode of a pair of thermistors coupled by a thermal bonding board to a fixed value or less. CONSTITUTION:A composite thermistor part 9 has a common terminal 11 supplying each one electrode of first and second thermistors 1 and 2 thermally coupled and formed mutually by a thermal bonding plate 10 with currents and terminals 5, etc., connected to respective other electrodes, and the bonding plate 10 and the terminal 11 are bonded by a thermal resistance member 12, thermal resistance of which is larger than that of a heat-dissipating section 10b for the bonding board. Consequently, the temperature of the terminal 11 changes approximately rectilinearly to the alteration of the length L of the member 12, and can be lowered to a fixed value or less such as the limit of the temperature rise of a board. Reliability is improved while residual currents are diminished and the whole power consumption can be reduced in a demagnetizer employing the part 9.