| 摘要 |
PROBLEM TO BE SOLVED: To obtain a bayonet fixing device for an annular member excellent in strength with simple constitution. SOLUTION: This bayonet fixing device is provided with a cylindrical member, another annular member positionally regulated in a rotating direction and positioned on the end face of the cylindrical member and a retainer ring fixing another annular member on the cylindrical member. The cylindrical member is provided with plural bayonet pawls formed to project in a radial direction separately in a peripheral direction, a small-diameter insertion part positioned between the bayonet pawls, and a rotation regulating recessed part positioned on the back of the bayonet pawl on its end face; another annular member is provided with rotation regulating projecting part fit in the rotation regulating recessed part after it is inserted from the small-diameter insertion part of the cylindrical member and then relatively rotated to the cylindrical member so as to be rotated to the back of the bayonet pawl; and the retainer ring is provided with plural fixed pawls inserted from the small-diameter insertion part and then relatively rotated to the cylindrical member so as to be positioned on the back of the bayonet pawl.
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