| 摘要 |
The release button (14) movably guided on the frame (10) has two stop pieces (14a,14b) spaced apart in their direction of movement. The lever (16) has a first arm (16c) whose free end faces the first stop piece (14a) of the release button, and a second arm (16d) whose free end faces the second top piece (14b) of the release button. A compensating weight is distributed onto two parallel arms joined by the lever's pivot axle. A spring (20) exerts pressure on the lever into a non-operating position. |
