Patent ID: 7802918

Claim:
A thermal sensing device comprising: a thermal sensing unit that senses heat in a monitoring area; a casing that holds the thermal sensing unit and that has an opening; an outer laminating member that is formed in a film-like shape, that is formed from same type of resin as resin used for the casing, and that absorbs the distortion caused by the difference in coefficients of thermal expansion of the thermal sensing unit and the casing at the changes of ambient temperature; and a pair of protective films that prevent entrance of moisture from the monitoring area into the thermal sensing unit, wherein the thermal sensing unit is arranged between the pair of protective films and covered thereby, wherein the thermal sensing unit covered by the pair of protective films is located at inner side of the opening of the casing, wherein the outer laminating member is disposed at outer side of the opening of the casing, wherein the opening is closed with the outer laminating member by connecting the edge portion of the outer laminating member with the edge portion around the opening of the casing by melting, and wherein the thermal sensing unit is fixed to the casing only by the pair of protective films and the outer laminating member.