| 摘要 |
<p>The telescopic linear setting unit has a hollow outer cylinder (4) containing a hollow inner cylinder (7), of an electrically conductive material. A contact unit is at least partially enclosed by the inner part to make cont/ct with the inner surface of the outer part so that, when sliding against the inner part, the contact pin (5) projects outwards from the outer part. The pin activates and deactivates a circuit by electrical conductivity through the contact unit. A slip contact (9) gives the connection between the circuit and the outer part.</p> |
