Needle assembly

Details Needle assembly Needle assembly

A - Human Necessities

61

M

A61M 5/32 (2006.01) A61M 1/36 (2006.01) A61M 5/24 (2006.01)

Patent

CA 2728148

A needle assembly 1 includes a hub 4 retaining a cannula 3, a protective unit 5 advancing and retracting to surround the forward end of the cannula 3, and a cylindrical portion 6 surrounding the outer periphery of the protective unit 5; the protective unit 5 has a construction in which a protective cover 7 protruding from and retracting into the cylindrical portion 6 is formed integrally with a spring portion 8 so as to be in series therewith, with the hub 4 and the cylindrical portion 6 being coupled together to form a hub member. Further, the protective cover 7 is provided with an engagement protrusion 24, and the hub member is provided with a guide means G; when the protective cover 7 is retracted from a pre-use state (Fig. 4(a)) in which it is situated at an advanced position, the engagement protrusion 24 moves backwards while rotating and in contact with an inclined surface 14a (Fig. 4(b)); when the protective cover 7 advances from a use state (Fig. 4(c)) in which it is situated at a retracted position, the engagement protrusion 24 moves forwards to be fixed to a post-use retaining portion B to be thereby prevented from retracting. The needle assembly can be produced at low cost and used safely.

L'invention porte sur un ensemble aiguille (1) comprenant un fût (4) portant une canule (3), une unité protectrice (5) pouvant avancer et se rétracter et entourant le bout de la canule (3), et une section tubulaire (6) entourant l'unité protectrice (5). L'unité protectrice (5) comporte un ressort (8) solidaire de la couverture protectrice (7) et la prolongeant. La couverture protectrice (7) est exposée et recouverte par la section tubulaire (6). Le fût (4) et la section tubulaire (6) forment ensemble le corps du fût. La couverture protectrice (7) présente un doigt (24) d'encliquetage et le corps du fût présente un moyen de guidage (G). Quand la couverture protectrice (7) se rétracte dans l'état d'avant utilisation (Fig. 4 (a)) où elle se trouve dans une position avancée, le doigt (24) d'encliquetage entre en contact avec une surface inclinée (14a) et se déplace vers l'arrière en tournant (Fig. 4 (b)). Quand la couverture protectrice (7) avance dans l'état d'utilisation (Fig. 4 (a)) où elle se trouve dans une position rétractée, le doigt (24) d'encliquetage se déplace vers l'avant et, maintenu par la section de blocage (B), ne peut plus reculer. L'ensemble aiguille, d'un bas coût de fabrication, est d'une utilisation sûre.

Affiliated with

Also associated with

Rating

Needle assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Needle assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Needle assembly will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1961047