Syringe

Patent metadata

Field	Value
Publication number	US-9555193-B2
Application number	US-201314400534-A
Country	US
Kind code	B2
Filing date	May 10, 2013
Priority date	May 11, 2012
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

A syringe includes a holding portion that accommodates an injection objective substance, a driving portion that applies injection energy, and a nozzle portion that includes a passage for injection, with these portions being loaded into a housing independently, whereby a state where the injection objective substance can be injected is established. The syringe includes a regulating means for regulating a loading position of the holding portion and the driving portion within the housing so that a loading state, where the holding portion and the driving portion are always loaded in the same order into the housing, is established for injection of the injection objective substance. Due to this, it is possible to facilitate injection of injection liquid ideal for various purposes and to improve user's convenience.

First claim

The invention claimed is:

1. A syringe that injects an injection objective substance into an injection target area of a living body,
the syringe comprising:
a housing;
a holding portion that accommodates the injection objective substance;
a driving portion that applies injection energy toward the injection objective substance accommodated in the holding portion, from the holding portion, wherein the driving portion includes an ignition charge or a gas generating agent that combusts with a voltage applied from a power source portion and applies the injection energy to the injection objective substance with pressure of a combustion gas that is generated by combustion of the ignition charge or the gas generating agent;
a nozzle portion that includes a passage, through which the injection objective substance injected from the holding portion flows, and injects the injection objective substance from an open end of the passage to the injection target area, wherein the holding portion, the driving portion, and the nozzle portion are loaded into the housing independently, whereby a state where the injection objective substance can be injected is established; and
regulating means for regulating a loading position of the power source portion, the holding portion and the driving portion within the housing so that a loading state in which the power source portion, the holding portion and the driving portion are always loaded in the same order into the housing is established for injection of the injection objective substance.

2. The syringe according to claim 1 , wherein
the driving portion, the holding portion, and the nozzle portion are formed so as to be superimposed in an axial direction of the housing when loaded into the housing, and the driving portion, the holding portion, and the nozzle portion are sequentially loaded from one direction into the housing through an opening of the housing,
the regulating means comprises:
a first tapered surface which is a continuous outer peripheral surface formed so as to extend from the driving portion toward the holding portion when the driving portion, the holding portion, and the nozzle portion are superimposed on each other, and which is formed so that a radius of the continuous outer peripheral surface increase gradually from the driving portion toward the holding portion; and
a second tapered surface which is a continuous inner peripheral surface on a side of the housing and corresponds to the first tapered surface.

3. The syringe according to claim 1 , wherein
the driving portion, the holding portion, and the nozzle portion are formed so as to be superimposed in an axial direction of the housing when loaded into the housing, and the driving portion, the holding portion, and the nozzle portion are sequentially loaded from one direction into the housing through an opening of the housing,
the regulating means comprises:
a first outer peripheral surface which is a step-shaped outer peripheral surface and includes an outer peripheral surface of the driving portion and an outer peripheral surface of the holding portion, which has a larger radius than a radius of the outer peripheral surface of the driving portion; and
a second inner peripheral surface which is a step-shaped inner peripheral surface formed on the housing and corresponds to the first outer peripheral surface.

4. The syringe according to claim 1 , wherein
the driving portion has a driving-side opening which is an opening for applying the injection energy to the holding portion,
the holding portion has an accommodation hole in which the injection objective substance is accommodated and the accommodation hole has an accommodation hole-side end portion that receives the injection energy applied from the driving-side opening, and
an annular projection, which surrounds the driving-side opening or the accommodation hole-side end portion and deforms in the loading state to seal a space between the driving-side opening and the accommodation hole-side end portion, is formed on one of the driving portion and the holding portion.

5. The syringe according to claim 1 , wherein
the driving portion has a driving-side opening which is an opening for applying the injection energy to the holding portion,
the holding portion has an accommodation hole in which the injection objective substance is accommodated and the accommodation hole has an accommodation hole-side end portion that receives the injection energy applied from the driving-side opening,
an annular projection which surrounds the driving-side opening or the accommodation hole-side end portion is formed on one of the driving portion and the holding portion,
an annular groove, which surrounds the driving-side opening or the accommodation hole-side end portion and engages with the annular projection in the loading state to seal a space between the driving-side opening and the accommodation hole-side end portion, is formed on the other one of the driving portion and the holding portion.

Assignees

• Daicel Corp

Inventors

• Yagi Toshiki
• Ueda Masayuki

Classifications

• A61M2005/2411

  from the front · CPC title

• A61M5/24 Primary

  Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic {(ampoules or carpules A61J1/06)} · CPC title

• A61M5/30 Primary

  Syringes for injection by jet action, without needle, e.g. for use with replaceable ampoules or carpules · CPC title

• A61M5/31566

  Means improving security or handling thereof · CPC title

• A61M5/31535

  Means improving security or handling thereof, e.g. blocking means, means preventing insufficient dosing, means allowing correction of overset dose · CPC title