| 摘要 |
The present invention relates to a sprinkler comprising: a shaft; a head rotating with the shaft; a rotatable arm including a first arm touching one surface of the head and a second arm touching the other surface of the head, and rotated around the shaft; an elastic member having one end coupled with the head and the other end coupled with the rotatable arm, surrounding the outer surface of the shaft, and applying rotational force to the rotatable arm in the direction opposite to the rotational direction of the rotatable arm to make the rotatable arm touch the head; and a buffer member installed on an area touching the head on the rotatable arm. |
