| 摘要 |
A ski boot liner (1) has a tongue (2) in which an ohmic heating element (4) is provided. A jack connector (11) is provided at the top of the tongue, with one wire (12) connected from one jack contact (121) to one upper end contact (14) of the heating element conductor (45) and another wire (15) connected from another jack contact (151) to the upper end contact (16) of the other element conductor (46). A thermistor (17) is included in the heating element. One wire (19) of the thermistor is connected to the wire (15) connected to the edge conductor (46) of the element, connecting one side of the element and one side of the thermistor in common to the jack contact (151) and the other thermistor wire (20) is connected to a third jack contact (201). In use a non-shown battery pack and control circuit provides power via a cable plugged into the jack connector. The battery pack and control circuit can be worn around the user's waist and the control circuit can use pulse width modulation to heat the tongue, bringing the temperature at the liner to one which is comfortable for the user. |
