PROBLEM TO BE SOLVED: To provide a hot-water bottle, even if the hot water gets cold, capable of returning its internal pressure to an atmospheric pressure and allowing a user to replace/repair a valve device alone.SOLUTION: This hot-water bottle is provided with a cap body 5 for opening/closing a filling port 3 of a hot-water bottle body 2, and the valve device 6 provided in the cap body 5 and being opened in one direction from the outside to the inside of the hot-water bottle body 2. The valve device 6 has through-holes 14 and 14 provided in the cap body 5, a packing 16 opening/closing the through-holes 14 and 14, and a coil spring 17 energizing the packing 16 in the opening direction of the through-holes 14 and 14, and the packing 16 is detachably provided in the cap body 5, so that, when the hot water gets cold and the inside of the hot-water bottle body 2 is depressurized, the packing 16 moves inward against the coil spring 17 to open the through-holes 14 and 14, eliminate a pressure difference between the inside and the outside, and prevent the deformation of the hot-water bottle body 2 due to depressurization and, even if the hot water gets cold, the cap 4 is easily detached.COPYRIGHT: (C)2008,JPO&INPIT【課題】お湯が冷めても内圧を大気圧に戻すことができ、弁装置のみの交換・補修が可能な湯たんぽを提供する。【解決手段】湯たんぽ本体2の注水口3を開閉するキャップ本体5と、このキャップ本体5に設けられ湯たんぽ本体2の外側から内側の一方向に開成する弁装置6とを備える。前記弁装置6は、キャップ本体5に設けられた貫通孔14,14と、この貫通孔14,14を開閉するパッキン16と、このパッキン16を貫通孔14,14の閉成方向に付勢するコイルスプリング17とを備え、キャップ本体5にパッキン16を着脱可能に設けたから、お湯が冷めて湯たんぽ本体2内が減圧すると、コイルスプリング17に抗してパッキン16が内側に移動し、貫通孔14,14が開成することにより、内外の圧力差がなくなり、湯たんぽ本体2が減圧により変形することがなく、お湯が冷めてもキャップ4を簡単に取り外すことができる。【選択図】図1
