| 摘要 |
PROBLEM TO BE SOLVED: To allow a rear lid to shift from an unlocked state to a locked state relative to a cover body when the rear lid is in a normal mounting attitude relative to the cover body of a gas meter and to prohibit the rear lid from shifting from the unlocked state to the locked state relative to the cover body when the rear lid is in an abnormal mounting attitude in which the rear lid is not in the normal mounting attitude relative to the cover body.SOLUTION: A lock mechanism 80 has receiving portions 82 and 83 forming a socket extending along a line direction following the internal surface of a rear lid 60, the receiving portions provided at the rear lid 60, and also has a pawl portion 84 extending along the line direction under a locked state in a normal mounting attitude, the pawl portion provided at a cover body 40.SELECTED DRAWING: Figure 3 |
