PROBLEM TO BE SOLVED: To provide a belt length adjustment mechanism of a head-mounted device which facilitates operation of the belt length adjustment even when the head-mounted device is mounted on the head, and also facilitates the correct belt length adjustment and the fine belt length adjustment.SOLUTION: In the belt length adjustment mechanism, an operation member 5 which can draw in a belt 2 to an exterior member 3 and draw out the belt 2 from the exterior member 3 is installed by mounting the exterior member 3 to the belt 2 and winding and unwinding a wire 4 to/from the exterior member 3 to adjust the length of the wire 4.COPYRIGHT: (C)2014,JPO&INPIT【課題】顔面装着具を顔面に装着した状態においても、ベルトの長さ調節の操作がし易く、しかもベルトの長さの正確な調節、及びベルトの長さの微調節が簡単にできるようにした顔面装着具のベルト長さ調節機構を提供する。【解決手段】ベルト2に外装部材3を装着し、この外装材3に、線材4を巻き込んだり、解き出したりして、その線材4の長さを調節することにより、前記ベルト2を外装部材3に引き込んだり、外装部材3から引き出せるようにした操作部材5を設置したものとしている。【選択図】図1
