초록 ▼

A tubular pushing member, when released by the trigger of a pistol grip moves forward under the pull of a spring, releases the catch of a sliding carriage which then quickly jabs forward under the pull of another spring to jab the needle of a syringe carried by it through the patient\s skin, after w

A tubular pushing member, when released by the trigger of a pistol grip moves forward under the pull of a spring, releases the catch of a sliding carriage which then quickly jabs forward under the pull of another spring to jab the needle of a syringe carried by it through the patient\s skin, after which the further progress of the pushing member comes up against the plunger of the syringe, which it engages with an adjustable plunger mounted on a heel bracket of the tubular pushing member. The progress of the actuation of the syringe plunger may be slowed down, interrupted or allowed to accelerate at any stage of the injection by virtue of frictional engagement with the tubular pushing member by a rubber piece mounted on the top edge of the trigger plate and a spring weaker than the trigger spring makes it possible for the braking friction to taper off gradually for better control of the movement of the syringe piston as the trigger is pulled away from the tubular pushing member against the force of the trigger spring.

대표청구항 ▼

An injection device for intramuscular injection of a medicament comprising: a guiding housing (2) having a pistol grip (2a) depending therefrom, a trigger member (7) forwardly adjacent said pistol grip (2a) and movable with respect thereto and to said housing, and a first spring (33) opposing the pu

An injection device for intramuscular injection of a medicament comprising: a guiding housing (2) having a pistol grip (2a) depending therefrom, a trigger member (7) forwardly adjacent said pistol grip (2a) and movable with respect thereto and to said housing, and a first spring (33) opposing the pulling of said trigger member back against said pistol grip; a push member (5) for actuating the injection device movable in a first guideway (19) of said housing connected to a second spring for moving it forwardly in said guideway and having a heel bracket (23); a carriage (3) movable in said second guideway in said housing and having means for holding a syringe (4) in said carriage with its needle extending forward and its piston shaft extending rearward towards said heel bracket (3); a third spring (13) connected to said carriage for moving said carriage forward for making a skin puncture with the needle of a syringe mounted therein, and a releasable catch (16,15) cooperating with a notch in said carriage (3) and mounted on said housing, for holding said carriage in cocked position against the force of said third spring, said catch having a portion extending into the initial path of travel of said push member (5) for causing said push member to release said carriage from its cocked position; said trigger member (7) having means (31) for frictionally engaging said push member (5) for braking the movement of said push member and for arresting the movement thereof by the force of said first spring (33) in the idle or released condition of said trigger member (7) said heel bracket (23) having means for bearing against and actuating the piston shaft of a syringe mounted in said carriage.