| 摘要 |
PROBLEM TO BE SOLVED: To prevent trigger operation by mischief of children or careless liquid jetting. SOLUTION: From an injection pipe 3, a guide plate 10 is installed vertically along the front face of a trigger 4; the second open hole 11 communicating to the first open hole 8 formed on the trigger 4 is formed on the guide plate 10; a side plate 13 is installed so that it protrudes from the left and right sides of a front plate 12 freely movable up-and-down along the front face of the guide plate 10, forming a sliding section 14 of a plain square U shape so that the guide plate 10 is fastened freely movably up-and-down by both left and right side plates of the sliding section 14; a locking rod 16 is protruded backwardly from the front plate 12 through the second open hole 11 and the first open hole 8; a connecting nail 17 is protruded from the rear end of the locking rod 1; and the locking rod has a connecting position at which the connecting nail 17 connects with the lower rear edge of the first open hole 8 to make the backward drawing of the trigger 4 impossible and a nonconnecting position at which the connecting nail 17 is apart from the lower rear edge of the first open hole 8 to make the backward drawing of the trigger 4 possible. |
