Syringe

Abstract

A syringe having a dispensing element (20) and having a mounting element (2), wherein the dispensing element (20) has a dispensing sleeve (21) and a leaf spring system (3), wherein the mounting element (2) has a syringe body (17), and an injection needle (16) is formed on one end on the syringe body (17) and a detent-engagement flange (19) is formed on the other end, wherein, in the syringe body (17), there is arranged a movable stopper (18), wherein the leaf spring system (3) comprises a piston (6) and a spiral spring (5) arranged around the piston (6), wherein the piston (6) can be slid into the dispensing sleeve (21), and the spiral spring (6) is arranged between a leaf spring base (22) and a spiral spring abutment, wherein the piston (6) abuts against the stopper (18), wherein the dispensing sleeve (21) has a guide duct and the dispensing sleeve (21) comprises a first locking means (7) and a second locking means (9), wherein the detent-engagement flange (19) is movable in the guide duct and is fixable and releasable at the first locking means (7) or the second locking means (9).

Claims

1. A syringe having a discharge element (20) and having a storage element (2), wherein the discharge element (20) has a discharge sleeve (21) and a spring system (3), wherein the storage element (2) has a syringe body (17), and an injection needle (16) is formed at one end on the syringe body (17) and an engagement flange (19) is formed at the other end, wherein a movable stopper (18) is arranged in the syringe body (17), wherein the spring system (3) comprises a plunger (6) and a spiral spring (5) arranged around the plunger (6), wherein the plunger (6) and the spiral spring (5) can be pushed into the discharge sleeve (21), and the spiral spring (5) is arranged between a spring base (22), wherein the plunger (6) abuts against the stopper (18) and the spiral spring (5) abuts against a spiral spring stop (12) at the spring base (22), wherein the discharge sleeve (21) has a guide channel and the discharge sleeve (21) comprises a first locking means (7) and a second locking means (9), wherein the syringe body is moveable along the discharge sleeve between a first position wherein the engagement flange (19) of the syringe body is fixable and releasable at the first locking means (7), and a second position wherein the engagement flange (19) of the syringe body is fixable and releasable at the second locking means (9), wherein the discharge sleeve (21) has a puncture abutment face (13) at one end and the first locking means (7) is formed at the other end, wherein the puncture abutment face (13) comprises a receptacle, and wherein the puncture abutment face (13) comprises a bellows (14).

2. The syringe as claimed in claim 1, wherein the discharge sleeve (21) has a further guide channel, wherein a further engagement flange can be operatively connected to the further guide channel.

3. The syringe as claimed in claim 2, wherein the first locking means (7) locks and releases the engagement flange (19), and the second locking means locks and releases the further engagement flange.

4. The syringe as claimed in claim 1, wherein the stopper (18) is displaceable in the storage element (2) and sealed off.

5. The syringe as claimed in claim 1, wherein the first locking means (7) comprises a first spring element, wherein the first spring element is integrally connected to the spring system (3).

6. The syringe as claimed in claim 1, wherein the second locking means (19) comprises a second spring element, wherein the second spring element is integrally connected to the spring system (3).

7. The syringe as claimed in claim 1, wherein the bellows (14) is arranged on the receptacle.

8. The syringe as claimed in claim 1, wherein the spring system (3) is composed of the loaf spring base (22) and a ceiling region, wherein the ceiling region comprises the discharge sleeve (21), wherein the plunger (6) extends from the spring base (22) to the ceiling region and, between the spring base (22) and the ceiling region, a compression spring element is integrally formed with the spring base (22) and the ceiling region, wherein the compression spring element comprises a retention element.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) A detailed description follows, with reference to the attached drawings, wherein:

(2) FIG. 1 is a cross section of a disposable syringe according to the invention;

(3) FIG. 2 is a cross section of a storage element according to the invention;

(4) FIG. 3 is a cross section of a discharge element;

(5) FIG. 4 is a plan view of the system according to the invention;

(6) FIG. 5 shows an alternative embodiment of the invention with a bellows integrated into the discharge;

(7) FIG. 6 is a cross section through the discharge element according to an unlocking variant of the invention; and

(8) FIG. 7 illustrates an alternative embodiment of the vertical unlocking in a cross section through the discharge element.

DETAILED DESCRIPTION

(9) Further advantages, features and details of the invention will become clear from the following description of preferred illustrative embodiments and by reference to the drawings, in which

(10) FIG. 1 shows a cross section of a disposable syringe 1 according to the invention composed of the discharge element 20 with a fitted storage element 2. A first locking means 8 and a second locking means 9 are also shown. The pretensioned spiral spring 5, which is integrally connected centrally on the plunger 6 to the leaf spring 3 with the integrated grip faces 4, shows the system prior to the injection. A spring guide 12 is also shown.

(11) A spring guide 12 protrudes cylindrically from a leaf spring base 22 and serves to partially receive the spiral spring 5 and the plunger 6. At one end, the spiral spring 5 is integrally connected to the grip face 4 via the spring guide 12. The plunger 6 in turn is likewise connected to the grip face 4. The spiral spring 5 engages around the plunger 6. Through the compression of the leaf spring 3, the plunger 6 activates the storage element 2, such that a stopper 18 discharges the content of the storage element 2 via the injection needle 16, wherein the injection needle 16 comprises is at a first end of the syringe body 17, and the stopper 18 and an engagement flange 19 are present at a second end.

(12) The first locking means 7 and a spring element 11 can also be seen, which are formed as a part of the discharge element 20.

(13) Lastly, a puncture abutment face 13 can be seen in FIG. 1, which abuts against the skin during the injection.

(14) FIG. 2 shows the storage element 2 in cross section, with a protective cap 15 over the injection needle 16 on the syringe body 17, and the stopper 18 as movable base. The engagement flange 19 has the role of fixing the system in the discharge element 20.

(15) FIG. 3 shows a cross section through the discharge element 20 without the storage element 2. In the upper region, the second locking means 9 sits on the spring element 11. In the region of the grip face 4, the unlocking element 8 sits connected to the spring element 11. The grip faces 4 permit handling for self-medication or use by the physician. The doubled leaf spring system 3 brings the plunger 6 into position. The puncture abutment face 13 is embodied at the upper end of the system. Here, at the upper end means the end of the of the discharge element 20 lying opposite the leaf spring base 22. The puncture abutment face 13 is formed cylindrically and integrally onto the leaf spring element 3.

(16) FIG. 4 shows the system in a plan view with the grip faces 4, the first locking means 7 with a locking cam 8, and the second locking means 9 with a further locking cam 10.

(17) FIG. 5 shows a variant of the system with a bellows 14 integrated on the discharge element 20 for protecting the needle 16 in the storage element 2.

(18) FIG. 6 shows a cross section through the discharge element 20 with an unlocking variant. In the upper region, the unlocking element 9 sits with the grip variant designed for the physician and for self-medication. The vertical unlocking means 8 connected to the spring element 11 in the region of the grip face 4 is the first manual unlocking of the system for injection. The second unlocking via the unlocking element 9 frees the syringe from the system. The leaf spring element 3 brings the plunger 6 into position, such that the spiral spring 5 can move the storage element 2 with the syringe body 17.

(19) FIG. 7 shows a variant of the vertical unlocking 8 in a cross section through the discharge element 20. The unlocking element 8 is actuated via the manually controlled grip face 4 and the spring element 11.

LIST OF REFERENCE SIGNS

(20) 1 syringe 2 storage element 3 leaf spring system 4 grip faces 5 spiral spring 6 plunger 7 first locking means 8 locking cam 9 second locking means 10 further locking cam 11 spring elements 12 spring guide 13 puncture abutment 14 bellows 15 protective cap 16 injection needle 17 syringe body 18 stopper 19 engagement flange 20 discharge element 21 discharge sleeve 22 leaf spring base