RU2002108689A - Disposable Injection Device - Google Patents

Claims (9)

1. A disposable injection device containing a pre-filled syringe (1) equipped with a front nozzle (1a) carrying an injection needle (2), closed with a protective cap (3), and a syringe body (7) equipped with means (24) blocking from rotation and movement, said injection device is characterized in that: it comprises a tip (32), called a hook tip and comprising a front wall (33) and at least two legs (34-37), radially expanding and passing longitudinally in relation to frontally wall (33), providing cover for the protective cap (3) and provided with at least one internal hook (38, 39) for gripping said cap, the housing (7) has an open rear front surface for the injection of the syringe (1) and the opposite a front detachable portion (8b) located in said syringe body and bounded by a brittle zone (14) located at the level of the front nozzle (1a) of the syringe (1), the detachable portion comprises a collar (50) for compressing the legs (34-37) of the tip for hooks (32) so that the paws provide a grip t of the protective cap (3), said detachable portion (8b) and the tip for the hooks (32) are provided with combined means (16, 17, 40 and 41) of their relative blocking of movement and rotation. 2. An injection device according to claim 1, characterized in that the means for relative blocking of rotation and movement of the tip for the hooks (32) and the detachable section (8b) comprise: a plurality of longitudinal marks (41) made on at least one of the tabs (36, 37) of the tip for the hooks (32) and located below the collar (50) of the detachable section (8b) of the housing (7), when the syringe (1) is located in the latter, many longitudinal marks (16) are made on the detachable section (8b) down from the collar (50) so that it forms a shoulder (17) for abutment when moving ii ferrule hooks (32). 3. An injection device according to claim 2, characterized in that the longitudinal marks (16) made on the detachable section (8b) are distributed over the entire periphery of its inner surface. 4. An injection device according to one of claims 2 or 3, characterized in that the longitudinal marks (41) of each tab (36, 37) of the hook tip (32) are made on a bulge (40) having a front part (40b), forming a bevel to facilitate the passage of the collar (50). 5. The injection device according to one of the preceding paragraphs, in which the front nozzle (1a) of the syringe (1) contains an external tightness collar, characterized in that each hook (38, 39) for gripping the hook tip (32) is placed in such to ensure that the protective cap (3) is kept below the tightness collar. 6. An injection device according to one of the preceding paragraphs, characterized in that the collar (50) of the removed section (8b) is made so as to be located at the level of the gripping hooks (38, 39) of the hook tip (32). 7. An injection device according to one of the preceding paragraphs, characterized in that the collar (50) of the removed section (8b) is an internal bulge with an inclined rear part (15) forming a bevel for easy access. 8. The injection device according to claim 4, characterized in that the tip for the hooks (32) contains four longitudinal legs (34-37), evenly distributed with respect to the axis of the front wall (33), while two diametrically located legs (36 , 37) have a bulge (40), the other two (34, 35), called grips, contain at least one gripping hook (38, 39). 9. An injection device according to claim 8, characterized in that each of the gripping legs (34, 35) contains two longitudinal gripping hooks (38, 39).