| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface heating element capable of preventing: partial heating caused by a mutual printing gap between a resistor and a connection electrode for circuit connection; and generation of an area not contributing to heating. SOLUTION: The electrode 2 and the resistor 3 are formed by printing on an insulating board 1, the electrode 2 is provided with a pair of primary electrodes 4, a plurality of branched electrodes 5 extending from respective primary electrodes to mating sides, and connection electrodes 6 numerously branched from the branched electrodes and formed by setting a pair at opposite positions of opposite potential electrodes. When a height dimension of the resistor formed by being electrically connected to the connection electrode is L1 and length of the connection electrode is L2, a relationship is set up to be L2>L1. Consequently, a range of current conduction connection straight line length to the resistor is not lessened even though a mutual position relationship is shifted at the time of printing of the resistor and the electrode, and thus, reduction of a calorific value and generation of temperature unevenness on the resistor can be restrained. COPYRIGHT: (C)2011,JPO&INPIT |
