| 摘要 |
A tube coupling includes a main body with a throughway 11. The through way includes a step 14 against which a tube 13 abuts. The body has a threaded outer portion 20 on which a threaded collar 10b is mounted. The collar includes a cam surface 29. A resilient collet 26 is contained within the mouth of the collar so that the tube 13 projects through it. When the collar is rotated so that it moves towards the main body, a cam surface 29 presses on the collet, clamping the tube in the coupling. The outer surface of the body includes detents 21 which engage a projection on the collar, so that the collar can only be rotated between a first position (as shown) where the collet does not grip the tube, and a second where the tube is gripped.
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