NEEDLE PROTECTION DEVICE AND SAFETY NEEDLE ASSEMBLY Russian patent published in 2018 - IPC A61M5/32 

FIELD: medical equipment.

SUBSTANCE: invention relates to medical equipment, specifically to needle safety devices. Needle safety device comprises: a connecting portion configured to engage with a needle hub of a needle; a protection arm configured to receive a needle tube of the needle therein and having a proximal end portion adjacent to the connecting portion, a hinge member, connected between the connecting portion and the protection arm such that the protection arm rotates relative to the connecting portion; a pair of holding members formed on the proximal end portion of the protection arm and the connecting portion respectively, wherein the pair of holding members are configured to be engaged with each other in an unretreatable manner when the protection arm rotates to a full protection position in which the protection arm is most approximate to the needle tube of the needle relative to the connecting portion. Pair of holding members comprises: a first holding member comprising a first column-like portion and an anchor formed on the first column-like portion; and a second holding member comprising one or more paws formed on an edge of a through hole and extending towards a centre of the through hole, distal ends of the paws, or the distal ends of the paws and the edge of the through hole, defining a bore which has a maximum radial dimension of the bore smaller than the maximum radial dimension of a base of the anchor, wherein the paws are configured such that the distal ends of the paws allow a front end of the anchor to pass through the through hole and catch the base of the anchor in an unretreatable manner when the protection arm rotates to the full protection position. Device further comprises a pair of positioning arms formed on the proximal end portion of the protection arm and the connecting portion respectively, and being formed with at least one pair of complementary snap-fitting features, the at least one pair of snap-fitting features being configured to be engaged with each other in a separable manner when the protection am rotates to at least one middle position other than the full protection position relative to the connecting portion.

EFFECT: middle position is remote from the needle tube of the needle relative to the full protection position so that at the middle position, the pair of holding members are located in non-engaged position.

17 cl, 20 dwg