INJECTION NEEDLE ASSEMBLY AND DRUG INJECTION DEVICE
First Claim
1. An injection needle assembly comprising:
- a needle tube having a needle tip capable of being punctured in a living body;
a hub holding said needle tube;
an adjustment section disposed around said needle tube and having a needle projection surface from which said needle tip of said needle tube projects;
a stabilizing section extending from said hub and disposed to surround said needle tube, said stabilizing section having an end face which contacts with the skin when said needle tube is punctured in the living body; and
a puncture speed securing member disposed, at said adjustment section or said stabilizing section movably in an axial direction of said needle tube, for securing a speed and depressing force upon puncturing said needle tube in the living body by contacting the skin ahead of said needle tip of said needle tube when said needle tube is punctured in the living body.
1 Assignment
0 Petitions
Accused Products
Abstract
Objects are to ensure a required depressing force and puncture speed when a needle tube is punctured in the skin, and to be able to reliably situate a needle tip of a needle tube in the upper layer of skin. A needle injection assembly 2 includes a needle tube 5 having a needle tip 8 that can be punctured in a living body, a hub 6 that holds the needle tube 5, an adjustment section 12, a stabilizing section 13, and a puncture speed securing member 7. The adjustment section 12 is provided around the periphery of the needle tube 5 and has a needle projection surface 12a, from which the needle tip 8 of the needle tube 5 projects. The stabilizing section 13 extends from the hub 6, is disposed to surround the needle tube 5 and has an end face 13a that comes in contact with the skin when the needle tube 5 is punctured in the living body. The puncture speed securing member is provided at the adjustment section 12 or stabilizing section 13 such that the puncture speed securing member moves along the axial direction of the needle tube 5. The puncture speed securing member 7 is brought into contact with the skin ahead of the needle tip 8 of the needle tube 5 when the needle tube 5 is punctured in the living body and ensures the speed and depressing force as desired when the needle tube 5 is punctured in the living body.
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Citations
11 Claims
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1. An injection needle assembly comprising:
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a needle tube having a needle tip capable of being punctured in a living body; a hub holding said needle tube; an adjustment section disposed around said needle tube and having a needle projection surface from which said needle tip of said needle tube projects; a stabilizing section extending from said hub and disposed to surround said needle tube, said stabilizing section having an end face which contacts with the skin when said needle tube is punctured in the living body; and a puncture speed securing member disposed, at said adjustment section or said stabilizing section movably in an axial direction of said needle tube, for securing a speed and depressing force upon puncturing said needle tube in the living body by contacting the skin ahead of said needle tip of said needle tube when said needle tube is punctured in the living body. - View Dependent Claims (2, 3, 4, 5, 7, 8, 9, 10, 11)
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6. A drug injection device comprising:
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a needle tube having a needle tip capable of being punctured in a living body; a hub holding said needle tube; an adjustment section disposed around said needle tube and having a needle projection surface from which a needle tip of said needle tube projects; a syringe connected to said hub; a stabilizing section extending from said hub and disposed to surround said needle tube, said stabilizing section having an end face which contacts with the skin when said needle tube is punctured in the living body; and a puncture speed securing member disposed, at said adjustment section or said stabilizing section movably in an axial direction of said needle tube, for securing a speed and depressing force upon puncturing said needle tube in the living body by contacting the skin ahead of said needle tip of said needle tube when said needle tube is punctured in the living body.
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Specification