PEN NEEDLE WITH SAFETY SHIELD SYSTEM

摘要

A needle tip for an injection device includes a body having a front portion, a back portion configured to be removably connected to the pre-loaded injection device, and a wall separating the front and back portions. A hollow needle has a first piercing portion projecting back from the separating wall and a second piercing portion projecting forward from the separating wall. A safety shield that is axially movable relative to the body at least between an initial position, a retracted position, and a post use locking position. This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.

主权项

1. A needle tip for an injection device comprising:
a body having a front portion, a back portion configured to be removably connected to the pre-loaded injection device, and a wall or needle support separating the front and back portions; a hollow needle having a first piercing portion projecting back from the separating wall and a second piercing portion projecting forward from the separating wall; and a safety shield that is axially movable relative to the body at least between an initial position, a retracted position, and a post use locking position, wherein the safety shield at least one of: is at least partially disposed within the front portion of the body, includes a locking system which is prevented from being contacted by a user's fingers, and moves linearly without also rotating; rotates at least partially in one direction as it moves from the initial position to the retracted position; includes at least one projection that extends into a guide recess comprising at least a linear section and a curved section; includes at least one projection that extends into a guide recess comprising at least a linear section and an angled section; includes at least one projection that extends into a guide recess comprising at least one locking mechanism for retaining the safety shield in the post use locking position; includes at least one mechanism for preventing a locking of the safety shield when said shield in not in the post use locking position; is utilized in combination with at least one depth adjustment mechanism for controlling a depth of injection; includes at least one pierceable member that is pierced during injection; includes at least one mechanism for providing an indication to the user that the needle tip has been used; and includes a first portion that is at least partially disposed within the front portion of the body, a second portion that at least partially covers the front portion, has its movement limited by engagement between at least one projection extending into a guide recess.