Patent ID: 8847124

Claim:
A heating device comprising: a heating element including a plurality of mountain parts consecutively connected to form a meander shape, each mountain part, of the plurality of mountain parts, including a front end and a holding body receiving part, wherein the front end of the mountain part is bent at an obtuse angle with respect to a portion of the mountain art other than the front end of the mountain part, and wherein a width of the holding body receiving part is larger than a width of a space between two adjacent mountain parts of the plurality of mountain parts; an insulating body surrounding the heating element and comprising a groove disposed on an inner circumferential surface thereof to accommodate the heating element, wherein a first sidewall and a second sidewall of the groove are respectively inclined at the obtuse angle with respect to a bottom surface of the groove such that the groove accommodates the heating element; and a holding body disposed in the holding body receiving part and fixing the heating element to the insulating body, wherein two ends of the heating element are fixed to the insulating body.