| 摘要 |
<p>An adjustable mechanism 1 for connecting a first shaft 2 with a hollow second shaft 4 comprises a spring 6 attached at one end of the second shaft 4. The spring 6 has an inner diameter similar to the outer diameter of the first shaft 3. The spring 6 ends in a solid ring 7. By pushing the ring 7 back towards the second shaft 4 the inner diameter of the spring 6 is increased to be greater than the outer diameter of the first shaft 2. This allows insertion of the first shaft 2 into the spring 6 and the second shaft 4. The ring 7 is then released to allow the spring 7 to return to its original dimensions. Since the first shaft 2 is now inside the spring 6 and the inner diameter of the spring 6 is similar to the outer diameter of the first shaft 2, the spring 6 will now grip the outer surface of the first shaft 2. The mechanism 1 further comprises an anti rotation mechanism that restricts relative rotation of the first and second shafts when the shafts are in position. The anti-rotation mechanism is selected from: a second spring anchored to an end of the first shaft 2; a non-circular section of the first and second shafts, and a protrusion on one shaft and a corresponding indentation on the other shaft.</p> |
