| 摘要 |
The invention relates to an injection syringe, in particular for hypodermic injections. On the threaded rod 4 of the piston 3, the threaded ring 13 comprises an internal click jumping from one of the four grooves 12 to another when the ring is unscrewed. The click stops it being screwed in. If the wall 16 is smooth, injection is carried out by pushing on the head 5. If it is threaded and has a click, injection is performed by screwing the rod 4 into the annulus 6. Application: injection of the contents of the body 2, in several successive precise doses. <IMAGE>
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