Patent ID: 8900199
Filing Date: 2014-12-02
Classification: A61M

Abstract:
1. A needle tip protector comprising: a protector main body having an insertion passage where a needle is inserted, the protector main body being mounted against the needle by means of having the needle inserted into the insertion passage such that the protector main body is movable in an axial direction of the needle while extending along the same direction; at least one flexible plate attached to the protector main body and extending toward the needle tip at a location orthogonally away from the needle inserted into the insertion passage of the protector main body in a way that allows a distal end of the at least one flexible plate to undergo flexural deformation in a direction of getting closer to the needle; a protection part placed at the distal end of the at least one flexible plate and that protects the needle tip by being placed at a protective position to cover the needle tip when the at least one flexible plate undergoes flexural deformation in the direction of having the distal end get closer to the needle in a state where the protector main body is moved toward the needle tip of the needle inserted into the insertion passage; an action ring that is externally fitted about the protector main body in a movable way in the axial direction of the needle and allows the protection part to be placed in the protective position by causing flexural deformation of the distal end of the at least one flexible plate in the direction of having the distal end get closer to the needle through an advance movement toward a distal end side of the protector main body; and a slip-stop mechanism that prevents the action ring from slipping out of the protector main body in the axial direction of the needle, wherein the protector main body includes: wherein as the action ring advances toward the distal end side of the protector main body, the protection part is placed at the protective position by having the pair of flexible side plates pushed inward with the action ring in the opposing direction of each other and flexurally deformed in the direction of getting closer to each other, and any slip-out of the action ring from the distal end side of the protector main body is prevented by means of engaging a front-end surface located on an advancing side of the action ring with the protruded engaging part of the distal end-side bottom plate.