| 摘要 |
Length-adjusting device is provided on a switch, intended to indicate the shift of an object from a normal position. The switch comprises a fixed part, intended to be assembled securely in a chassis for example, and a switch part which is movable relative to the latter and which can be changed between different positions for switching the switch depending on the position of the object. The length-adjusting device comprises a first part, which interacts with the object in its positional shifting movements, and a second part which interacts with the movable switch part such that the said second part attempts to hold the movable switch part in one of its positions. The length-adjusting device comprises at least one fluid chamber which changes volume upon relative movement between the first and the second part. A valve is connected to the chamber and permits the passage of fluid to or from the chamber and maintains a resistance to passage of fluid to or from the chamber and maintains a resistance to passage of fluid in the opposite direction. By this means the length-adjusting device adapts the position of the second part relative to the position of the first part to the distance between the normal position of the object and the switch. |
