| 摘要 |
A control device on a chain saw, for example, a gas control, consisting of a finger grip (12) and a lever (11) (snapped together) to which the cable and the sheath of a Bowden cable (10) are attached, respectively. The other end of the sheath is fastened to the base of a carburetor compartment. When the grip and the lever move upwards, the rear end (28) of the lever hits a fulcrum (20) in the handle. The grip can continue upwards due to a guide point between the lever and the grip and, thus, the wire is moved in relation to the sheath so that a gas lever (13) of the carburetor is tuned. The sheath, consisting of a spirally wound steel wire, is tightly wound, but has also a short length (31) being sparsely wound as a pressure spring and provides an overload protection preventing the cable from breaking. |
