| 摘要 |
<p>A spring actuator 1 is provided. A constant force spiral extension spring 10 has a central coil end 11 and a free end 13. A channel member 4 is provided to house the spiral spring 10 with means 5A, 5B to secure the spring free end 13 in a fixed position and to allow the spiral spring 10 to unwind in the channel member 4 away from the free end 13 and to wind up in the channel member 4 towards the free end 13. A slider 20 is provided to slide in the channel 4 and abut against the spiral extension spring 10 and to be biased towards the spring free end 13 when the spring is unwound. In use the slider 20 is engageable with an object to provide a spring bias on the object as the slider 20 is biased toward the spring free end 13.</p> |
