| 摘要 |
PROBLEM TO BE SOLVED: To provide a water amount-adjusting mechanism for water sprinklers with which the amount of water can be adjusted. SOLUTION: The water amount-adjusting mechanism for water sprinklers includes a cylinder 31 forming a conduction path 63, a piston 61 movably mounted in the cylinder 31, and a seal member 94 set up to the piston 61, and the back and front sides of the cylinder on the boundary of the seal member 94 are sealed with each other with the seal member 94. The inner peripheral surface 71 of the cylinder 31 is equipped with first-third conduction grooves 81-83 which are each extensionally disposed in a moving direction of the piston 61 to the cylinder 31 and whose lengths are set to be different from one another, so that the back and the front sides partitioned by the seal member 94 can be communicated with one another via the respective conduction grooves 81-83. COPYRIGHT: (C)2010,JPO&INPIT |
