Safety device for shielding an injection needle of a medical container, and an injection device including this safety device
The safety device includes a tubular body extending along a longitudinal axis. The tubular body is configured to receive the medical container, a needle cover movable relative to said body between a retracted position, and an extended position in which the needle cover distally extends from the retracted position in order to shield the injection needle after activation of the safety device, a release element configured to move the needle cover from the retracted to the extended position after activation of the safety device, and a retainer for maintaining the release element in a compressed condition when the needle cover is in the retracted position. The retainer is configured to transmit a user's activation force to the needle cover once the injection operation is completed. The needle cover includes a distal abutment surface, said distal abutment surface abutting against a proximal abutment surface of a bump protruding from the body in the retracted position of the needle cover. The distal abutment surface of the needle cover is located on a radial protrusion, and the radial protrusion has reinforcing means configured to reinforce a proximal side of this radial protrusion.
1 . A safety device for mounting onto a medical container provided with a flange and an injection needle, the safety device comprising:
a tubular body extending along a longitudinal axis, the tubular body being configured to receive the medical container,
a needle cover movable relative to the tubular body between a retracted position, and an extended position in which the needle cover distally extends from the retracted position in order to shield the injection needle after activation of the safety device,
a release element configured to move the needle cover from the retracted position to the extended position after activation of the safety device,
a retainer, the retainer being configured to transmit a user's activation force to the needle cover once the injection operation is completed, wherein
the needle cover comprises a distal abutment surface, the distal abutment surface abutting against a proximal abutment surface of a bump protruding from the tubular body in the retracted position of the needle cover, and wherein the distal abutment surface of the needle cover is located on a radial protrusion, and the radial protrusion has reinforcing means configured to reinforce a proximal side of this radial protrusion.
2 . The safety device of claim 1 , wherein the reinforcing means include a bulge at the proximal side of the radial protrusion.
3 . The safety device of claim 2 , wherein the bulge circumferentially extends all around the needle cover.
4 . The safety device of claim 2 , wherein the bulge has a curved surface.
5 . The safety device of claim 2 , wherein the bulge has a curved surface.
6 . The safety device of claim 1 , wherein an axial distance from a crest to a proximal end of the radial protrusion may be greater than an axial distance from said crest to a distal end of the radial protrusion.
7 . The safety device of claim 1 , wherein at least one of the proximal abutment surface and the distal abutment surface comprises a chamfer configured to ease passage of the needle cover over the bump when the needle cover moves distally to the extended position.
8 . The safety device of claim 1 , wherein the distal abutment surface is located on a reduced thickness portion of the needle cover.
9 . The safety device of claim 1 , wherein the bump has a cantilevered portion.
10 . The safety device of claim 1 , wherein the body has a first axial slot and a second axial slot, the first axial slot and the second axial slot extending on both sides of the bump.
11 . The safety device of claim 1 , wherein the body has a first axial slot extending from a distal end of the body, and the bump is circumferentially distant from said first axial slot.
12 . The safety device of claim 1 , wherein the bump extends in a circumferential direction according to a central angle comprised between 22.5°-45°.
13 . The safety device of claim 1 , wherein the bump of the body has a first end provided with a chamfer extending in a circumferential direction.
14 . The safety device of claim 1 , wherein the bump of the body has a first end, an opposite second end, and a decreasing height from said second end to said first end.
15 . The safety device of claim 1 , wherein the device comprises only two bumps.
16 . The safety device of claim 1 , wherein the bump has a first end and an opposite second end, and the proximal abutment surface of said bump has a ramp portion, said ramp portion having a decreasing slope towards the first end of said bump.
17 . The safety device of claim 1 , wherein the body has a first axial slot extending from a distal end of said body, the first axial slot having a predetermined length comprised between 1 mm-6 mm.
18 . An injection device comprising a medical container having an injection needle and the safety device of claim 1 , said safety device being mounted onto said medical container.