PROBLEM TO BE SOLVED: To reduce a total length of a heater 27 for an aquarium easily even when a temperature fuse 45 is built therein.SOLUTION: While the heater for an aquarium houses a cylindrical body 39 composed of an insulating material in which a heating wire 40 is closely disposed in the outer periphery, in a closed space 31 of a heater case 32, the temperature fuse 45 which fuses an inner part of the cylindrical body 39 by energization in air is installed in the middle of a connection line 43 extending to an axial direction. Accordingly, the temperature fuse 45 and the heating wire 40 are interposed with each other in a radial direction while the cylindrical body 39 is held by them, and thus the total length of the heater 27 for an aquarium can be reduced easily with a simple structure.COPYRIGHT: (C)2012,JPO&INPIT【課題】水槽用ヒーター27に温度ヒューズ45が内蔵されていても全長を容易に短くする。【解決手段】ヒーターケース32の密閉空間31に発熱線40が外周に密着配置された絶縁材料からなる円筒体39を収納する一方、該円筒体39の内部を軸線方向に延びる接続線43の途中に気中通電により溶断する温度ヒューズ45を介装したので、温度ヒューズ45と発熱線40とが円筒体39を間に挟んだ状態で半径方向に重なり合うこととなり、これにより、水槽用ヒーター27の全長を簡単な構造で容易に短くすることができる。【選択図】図3
