Arrangement for coupling a plunger to either a syringe or a stopper

摘要

An arrangement for coupling a plunger to either a syringe or a stopper arranged in the syringe. The arrangement includes a syringe holder which is slidably arranged in a housing. The syringe holder is provided with at least one resilient syringe holder arm arranged distally, the syringe holder arm having an inclined surface for bearing against a shoulder, which is arranged at the plunger. The syringe holder arm is supportable by an inner surface of the housing in order to prevent it from being flexed outward in a first position. A widened portion is provided in the housing for allowing the syringe holder arm to flex outwards and disconnect from the plunger when in a more proximal position so as to switch load of the plunger from the syringe to the stopper.

主权项

1. An arrangement for coupling a plunger to either a syringe or a stopper arranged in the syringe, the arrangement comprising:
a syringe holder configured to be slidably arranged in a housing and configured to be coupled to the syringe, the syringe holder comprising a resilient syringe holder arm having a first end and a second end, the first end of the syringe holder arm being attached to a distal end of the syringe holder, and the second end of the syringe holder arm having an inclined surface for bearing against a shoulder of the plunger, wherein the syringe holder arm is configured to be supported by a first portion of an inner surface of the housing to inhibit the syringe holder arm from being flexed outward when the syringe holder arm is in a first position, wherein the syringe holder arm is configured such that the inclined surface of the second end of the syringe holder arm engages the shoulder of the plunger to connect the syringe holder arm to the plunger when the syringe holder arm is in the first position, and wherein the syringe holder arm is configured to flex outwards into a second portion of the inner surface of the housing and to disengage the inclined surface of the second end from the shoulder of the plunger such that the syringe holder arm is disconnected from the plunger and engages with the stopper when the syringe holder arm is in a second position proximal to the first position.