Heating device

A heating device comprising:

• a heating member rotatable about a rotary shaft supported by a first bearing and a second bearing, the heating member having a first opening and a second opening formed at opposite ends thereof, respectively, along a direction of the rotary shaft;
• a heat generating member including a heating element, a first tubular heating element support member having a first heating element support portion at one end thereof for supporting one end of the heating element, and a first tube opening at the other end, a second tubular heating element support member having a second heating element support portion at one end thereof for supporting the other end of the heating element, and a second tube opening at the other end, the heat generating member being inserted into the heating member through the first opening and the second opening;
• and
• a coolant supplier for supplying a coolant from the first tube opening for cooling the first heating element support portion, and supplying the coolant from the second tube opening for cooling the second heating element support portion;
• wherein the heat generating member includes first coolant blowout holes formed between a portion thereof corresponding to the first bearing supporting the rotary shaft and the first heating element support portion for blowing the coolant supplied from the coolant supplier out into the rotary shaft, and second coolant blowout holes formed between a portion thereof corresponding to the second bearing supporting the rotary shaft and the second heating element support portion for blowing the coolant supplied from the coolant supplier out into the rotary shaft.