| 摘要 |
A stationery tool has a body, a pushbutton, a working element, and a push-proof device. The pushbutton is pushably and rotatably mounted on an end of the body. The working element is mounted in the body and is connected to and driven by the pushbutton. The push-proof device is mounted between the body and the pushbutton and has a blocking protrusion and a blocking segment. The blocking protrusion is disposed on the pushbutton. The blocking segment is disposed on the body, selectively abuts the blocking protrusion and has a passage defined in the blocking segment to allow the blocking protrusion to pass the blocking segment. Accordingly, a push-proof capability is provided to the pushbutton to prevent the working element from extending out of the body unintentionally. |
