| 摘要 |
A safety protective device for injection needles of the type which consists of a minimum of two bodies (1,2) related telescopically, enveloping the needle (7) which is attached firmly to one of them, that being the body that is provided with a housing for lodging the injection syringe (4), there being a compression spring (8) acting between the two bodies (1,2) tending to separate them such that one of the bodies encloses either partially or totally the needle (7) depending on the position of a stop (44) attached to one of the bodies and which moves along a slot (41,42,45) of complex form in the other body thus determining the specific position of the axial stop (44). |
