Needle-free injection device

• US 20070232994A1
• Filed: 03/30/2007
• Published: 10/04/2007
• Est. Priority Date: 03/30/2006
• Status: Abandoned Application

• Current Assignee: Terumo Kabushiki Kaisha (Terumo Corporation)
• Original Assignee: Terumo Kabushiki Kaisha (Terumo Corporation)
• Inventors: Matsumoto, Atsushi, Sonoda, Yutaro
• Application Number:
  US11/730,293
• Publication Number:
  US 20070232994A1
• Time in Patent Office: Days
• US Class Current: 604/68
• CPC Class Codes: A61M 5/2033 Spring-loaded one-shot injectors with or without automatic needle insertion multishot dosing syringes A61M5/31525, needle insertion only A61M5/3287
• CPC Class Codes: A61M 5/30 Syringes for injection by jet action, without needle, e.g. for use with replaceable ampoules or carpules
• CPC Class Codes: A61M 5/425 Protruding skin to facilitate piercing, e.g. vacuum cylinders, vein immobilising means
• CPC Class Codes: A61M 5/427 Locating point where body is to be pierced, e.g. vein location means using ultrasonic waves, injection site templates
• CPC Class Codes: A61M 5/46 having means for controlling depth of insertion

Abstract

The present invention relates to a needle-free injection device which includes a skin deforming member for deforming a skin, and a needle-free injector ejecting liquid by high pressure with respect to the skin deformed by the aforesaid skin deforming member and injecting the aforesaid liquid into the aforesaid skin.

Claims

1. A needle-free injection device comprising:

a skin deforming member for deforming a skin; and

a needle-free injector ejecting liquid by high pressure with respect to the skin deformed by said skin deforming member and injecting said liquid into said skin.

2. The needle-free injection device according to claim 1, wherein said skin deforming member has two or more planes fixed on the skin and the skin is deformed so as to form a step portion by said two or more planes.

3. The needle-free injection device according to claim 2, wherein it is constituted such that said needle-free injector ejects said liquid approximately parallel to the any one of said two or more planes of said skin deforming member and injects it into said step portion.

4. A needle-free injection device comprising:

a needle-free injector ejecting filled up liquid by high pressure;

a base member supporting said needle-free injector to be movable;

a skin deforming member mounted on said base member and also deforming the skin, wherein

it is constituted such that said needle-free injector is moved so as to approach to the skin deformed by said skin deforming member and the liquid is ejected by high pressure and injected with respect to said deformed skin.

5. The needle-free injection device according to claim 4, wherein said needle-free injector comprises a slide member supported on said base portion to be movable, and an injector body mounted on said slide member detachably.

6. The needle-free injection device according to claim 4, wherein said skin deforming member comprises:

a first tabular portion supported on said base member to be revolvable and also having a plane fixed on the skin;

a coupling portion connected to said first tabular portion through a first hinge portion and also having a plane fixed on the skin; and

a second tabular portion connected to said coupling portion through a second hinge portion and also having a plane fixed on the skin, wherein

the skin is deformed so as to form a step portion between said first tabular portion and said second tabular portion by bending-deforming said skin deforming member.

7. The needle-free injection device according to claim 6, wherein said first hinge portion is provided by forming a V-shaped groove to be opened downward at a connection portion of said first tabular portion and said coupling portion and also, said second hinge portion is provided by forming a V-shaped groove to be opened upward at a connection portion of said second tabular portion and said coupling portion.

8. The needle-free injection device according to claim 6, wherein said skin deforming member is bending-deformed by depressing said second tabular portion to said first tabular portion side so as to turn said first tabular portion upward.

9. The needle-free injection device according to claim 6, wherein there is provided with a spring member biasing said first tabular portion upward and said first tabular portion is turned by the spring force of said spring member so as to bending-deform said skin deforming member.

10. The needle-free injection device according to claim 6, wherein there is provided with a magnet portion on either one of said first tabular portion or said base member and also there is provided with a magnetic portion on the other one thereof which pulls said magnet portion toward each other, and said first tabular portion is made to turn by the magnetic force operated between said magnet portion and said magnetic portion so as to bending-deform said skin deforming member.

11. A needle-free injection device comprising

a positioning portion having a plane fixed on a skin;

a coupling portion connected to said positioning portion to be revolvable through a hinge portion and also having a plane fixed on the skin; and

a needle-free injector constituted integrally with said coupling portion and also being provided with an ejecting opening on a plane fixed on the skin of said coupling portion, wherein

it is constituted such that the skin fixed on said positioning portion and said coupling portion is uplifted by changing posture of said needle-free injector and by turning said coupling portion with respect to said positioning portion, and liquid is ejected from said ejecting opening by high pressure and injected into said uplifted skin.

12. The needle-free injection device according to claim 11, wherein when said coupling portion is turned with respect to said positioning portion, the plane fixed on the skin at said coupling portion becomes approximately perpendicular with respect to the plane fixed on the skin of said positioning portion.

13. The needle-free injection device according to claim 11, wherein there is provided with an engagement projection portion on one of said positioning portion and said needle-free injector and also there is provided with an engagement concave portion on the other one thereof which is to be engaged with said engagement projection portion when said coupling portion is turned with respect to said positioning portion, and it is constituted such that a state in which said coupling portion is turned with respect to said positioning portion is to be maintained.