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Injection needle assembly and medicine injection apparatus

A technology of assembly and injection needles, which is applied in the direction of syringes, hypodermic injection devices, needles, etc., can solve the problem of inability to ensure the dosage of the drug, and achieve the effect of reducing the residual volume and reducing the dead zone volume

Active Publication Date: 2012-05-23
TERUMO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the remaining amount of air remaining in the portion where the syringe and the hub engage increases, the remaining air becomes a pressure interference zone, and it may not be possible to ensure an accurate dosage.

Method used

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  • Injection needle assembly and medicine injection apparatus
  • Injection needle assembly and medicine injection apparatus
  • Injection needle assembly and medicine injection apparatus

Examples

Experimental program
Comparison scheme
Effect test

no. 2 Embodiment approach

[0115] [Pharmaceutical injection device]

[0116] Next, refer to Figure 6 , and a second embodiment of the drug injection device of the present invention will be described.

[0117] Figure 6 It is a sectional view of the second embodiment of the drug injection device.

[0118] Such as Figure 6 As shown, the drug injection device 61 is composed of an injection needle assembly 62 and a syringe 3 detachably connected to the injection needle assembly 62 . The injection needle assembly 62 has the same configuration as the injection needle assembly 2 according to the first embodiment. This injection needle assembly 62 is different from the injection needle assembly 2 in that a stabilizing portion 67 and a guide portion 68 are provided on the second member 65 of the needle hub 63 . Therefore, the stabilizing part 67 and the guide part 68 will be described here, and the same parts as those of the injection needle assembly 2 will be given the same reference numerals, and the de...

no. 3 Embodiment approach

[0125] [Pharmaceutical injection device]

[0126] Next, refer to Figure 7 and Figure 8 A third embodiment of the drug injection device of the present invention will be described.

[0127] Figure 7 It is a sectional view of the third embodiment of the drug injection device. Figure 8 It is an exploded cross-sectional view showing the third embodiment of the drug injection device.

[0128] Such as Figure 7 and Figure 8 As shown, the drug injection device 71 is composed of an injection needle assembly 72 and a syringe 3 detachably connected to the injection needle assembly 72 . The injection needle assembly 72 has the same configuration as the injection needle assembly 2 of the first embodiment. The injection needle assembly 72 differs from the injection needle assembly 2 only in the elastic member 74 . Therefore, the elastic member 74 will be described here, and the same parts as those of the injection needle assembly 2 will be given the same reference numerals, and...

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PUM

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Abstract

Provided are an injection needle assembly and drug injection device which reduce the amount of drug residue as a result of a structure which does not require precise adjustment of the position of the base end of a needle tube with respect to a needle hub. An injection needle assembly (2) comprises a needle tube (5) which has a needle tip (5A) for puncturing the skin, a needle hub (6), and an elastic member (7). The needle hub (6) comprises a first member (11) for holding the needle tube (5), and a second member (12) for insertion of an evacuation part (52) of a syringe (3). The elastic member (7) is disposed inside the second member (12) and adheres in a liquid-tight manner to the inside surface of the second member, and the elastic member (7) has a through hole (45) through which the needle tube (5) is allowed to pass.

Description

technical field [0001] The present invention relates to an injection needle assembly and a medicine injection device which reduce the residual amount of medicine. Background technique [0002] A drug injection device such as a syringe sometimes sucks a drug from a drug bottle. A medicine bottle is a medicine storage container capable of storing medicine for a long period of time in a liquid state or a freeze-dried state. The opening of the medicine bottle is generally closed with a rubber stopper with a thickness of about 3 to 5 mm. The rubber stopper is formed in such a way that the medicine will not leak out even if the needle tube is punctured many times, so most of the vaccines that are inoculated collectively are mostly sucked from the medicine bottle. [0003] In a general method of aspirating medicine from a vial into a syringe, first, a needle hub to which a syringe for aspirating of about 22 G is attached is connected to the syringe. Next, the suction needle is p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/32A61M5/178
CPCA61M5/3287A61M5/347A61M5/46A61B17/205A61M5/349A61M5/32A61M2005/31516A61M5/3293A61M2207/00
Inventor 横田崇之岩濑阳一郎菱川资文高桥吏
Owner TERUMO KK