| 摘要 |
PROBLEM TO BE SOLVED: To provide an extensible heater unit capable of housing an electric wire for connecting a heater in a compact way, and of facilitating handling.SOLUTION: Long and narrow fixed side heater housing cases 33a and 33b and expansion and contraction side heater housing cases 53a and 53b, which are configured movably in a longitudinal direction in parallel to each other and housing first and second heater parts 61, 62, 71, and 72, are connected by a power line 91. The power line 91 is provided with S-shaped bent expansion and contraction parts 93a and 93b having flexibility and bent in an S-shape. Due to the S-shaped bent expansion and contraction parts 93a and 93b, a length of the whole of the first and second heater part housing cases 33a, 33b, 53a, and 53b can be adjusted. |
