JP2014042617A - Injection needle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an injection needle preventing a finger and the like from touching a needle tip and being injured, and to provide an injection needle uniformizing a protrusion dimension of a needle and administering a drug solution to a targetted depth of the skin.SOLUTION: The injection needle comprises: a hub 2; a needle 4 attached to the hub 2 so as to protrude from the tip of the hub 2; and a substantially cylindrical protective cover 6 covering the periphery of the needle 4. The hub 2 includes a cylindrical attachment part 11 at the tip of the hub 2, and the attachment part 11 is formed with a recessed part 12, the tip side of which is opened. The needle 4 is disposed to pass through the recessed part 12. The protective cover 6 includes a base part 21 to be attached to the attachment part 11, a bellows-like expansion/contraction part extending from the base part 21, and a protection part 23 extending from the expansion/contraction part 22. The protection part 23 is formed thicker compared with that of the expansion/contraction part, and the tip of the needle 4 is located at the protection part 23. When the protection cover is compressed, the expansion/contraction part 22 and the protection part 23 of the protection cover 6 can be stored in the recessed part 12.

Description

  The present invention relates to an injection needle for preventing an accident infecting from blood of a patient attached to the tip of an injection needle that has been used by an operator such as a doctor or a nurse.

  Since the conventional needle has been exposed after use, the operator may accidentally pierce his / her finger, and therefore from the patient's blood adhering to the tip of the needle. Hepatitis, AIDS, etc. could be infected.

  In order to avoid such a risk, Japanese Patent Laid-Open No. 7-16295 (Patent Document 1) and Japanese Patent Laid-Open No. 8-182761 (Patent Document 2) have a bellows-like elastic member disposed around the needle. An injection needle has been proposed. After the use of the injection needle, the elastic member is restored to its original shape and disposed around the needle, so that it is possible to prevent the user's hand and the like from being accidentally pierced.

  In particular, in the injection needle of Patent Document 1, a needle tip guide is provided at the tip of the elastic member, and the needle tip guide prevents an operator from being accidentally stuck at the tip of the needle.

  However, with the injection needles described in these Patent Documents 1 and 2, the medicinal solution cannot be injected into the skin at a predetermined depth by piercing the skin by a certain size. That is, there is a drawback that the puncture depth of the needle changes depending on the degree of compression of the elastic member.

  Japanese Patent Application Laid-Open No. 2000-167054 (Patent Document 3) proposes an injection needle in which a stopper member for restricting the puncture depth of the needle is provided protruding from the needle holding member.

  However, in this injection needle, the tip of the cover that protects the needle is thinly formed so that the needle can penetrate. Therefore, when a finger or the like touches the protective cover, the needle penetrates the protective cover and the operator's There is a risk of piercing fingers.

  In particular, when the needle is configured to penetrate the tip membrane of the protective cover and pierce the skin, the needle penetrates the tip membrane of the protective cover and enters the skin with a momentum. It is dangerous because it cannot be controlled.

JP 7-16295 A JP-A-8-182761 Japanese Patent Laid-Open No. 2000-167054

  The present invention has been made to solve the above-described problems, and can securely protect the needle tip with a protective cover, and even if a finger or the like accidentally touches the tip of the protective cover, the finger touches the needle tip and is damaged. An object is to provide a needle that does not occur.

  Another object of the present invention is to provide an injection needle in which the puncture depth of the needle is constant and the drug solution can be administered to the target skin depth.

  Still another object of the present invention is to provide an injection needle that can safely pierce the needle into the skin.

In order to solve the above problems, the present invention is characterized by the following.
(Item 1) An injection needle having a hub, a needle attached to the hub so as to protrude from the tip of the hub, and a substantially cylindrical protective cover that covers the periphery of the needle,
A cylindrical attachment portion is provided at the distal end portion of the hub, and a concave portion having an opening on the distal end side is formed in the attachment portion.
The needle is arranged to pass through the recess,
The protective cover has a base attached to the attachment portion, a bellows-like stretchable portion extending from the base portion, and a protection portion extending from the stretchable portion,
The protective part is formed thicker than the stretchable part, and the tip of the needle is located in the protective part,
An injection needle in which the stretchable part and the protective part of the protective cover can be accommodated in the recess when the protective cover is compressed.
(Item 2) The hub includes a hub body through which a needle passes, a chemical solution storage portion provided at a base portion of the hub body, and the attachment portion provided at a distal end portion of the hub body.
2. The injection needle according to item 1, wherein a luer lock projection that can be connected to a syringe is provided at the base of the hub body.
(Item 3) The base portion of the protective cover includes a first base portion that is attached to the outer surface of the attachment portion of the hub, and a second base portion that extends from the first base portion and is attached to the inner surface of the attachment portion. 3. The injection needle according to item 1 or 2, which has
(Item 4) The injection needle according to any one of items 1 to 3, wherein the thickness of the protective portion of the protective cover is 1.5 to 3.0 times the thickness of the stretchable portion.
(Item 5) The needle tip is arrange | positioned at the base part of the protection part of the said protective cover, The base part of this protection part is 0 to 20 percent with respect to the full length of a protection part in any one of the items 1-4 Needle.

  According to the present invention, the protective cover includes a base portion that is attached to the attachment portion at the tip of the hub, a bellows-like stretchable portion that extends from the base portion, and a protective portion that extends from the stretchable portion. The protective part is formed thicker than the telescopic part, and the tip of the needle is located in the protective part. Therefore, when the injection needle is pulled out from the skin after using the injection needle, it is protected by the action of the bellows. The cover returns to its original state and covers the periphery of the needle tip. Since the protective portion of the thick protective cover is located around the needle tip, the needle tip can be reliably protected by this protective portion. Therefore, even if a finger or the like accidentally touches the protective portion of the protective cover, the finger does not touch the needle tip and be damaged.

  In addition, when the protective cover is compressed, the expansion / contraction part and the protective part of the protective cover are accommodated in a recess provided in the attachment part of the hub, so that the tip of the attachment part hits the skin when injecting. As a result, the protruding dimension of the needle is constant. Therefore, the chemical solution can be administered to the intended depth of the skin.

  Moreover, since the protective cover is formed in a substantially cylindrical shape and the needle can be pierced into the skin through the through hole in the protective cover, the needle can be advanced safely.

It is a perspective view of the injection needle of one embodiment of the present invention. It is sectional drawing of the injection needle shown in FIG. It is a front view of the injection needle shown in FIG. It is an expanded sectional view of the B section shown in FIG. It is a side view of the front end side of the injection needle shown in FIG. It is action | operation explanatory drawing of the injection needle shown in FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1 to 5, the injection needle A of the present invention includes a hub 2, a needle 4 attached to the hub 2 so as to protrude from the tip of the hub 2, and an approximately covering the periphery of the needle 4. A cylindrical protective cover 6.

  The hub 2 includes a substantially cylindrical hub body 14 in which a needle hole 18 through which the needle 4 passes is formed, a chemical solution storage section 20 provided in a base portion 19 of the hub body 14, and a distal end portion of the hub body 14. And a cylindrical mounting portion 11 provided.

The base portion 19 is formed in a cylindrical shape, and a chemical solution storage portion 20 is formed therein. A luer lock projection 17 that can be connected to a syringe is provided at the rear end portion of the base portion 19. A concave portion 12 having a distal end opening is formed in the attachment portion 11.

  A needle hole 18 is formed in the center position of the hub body 14 in the radial direction, the needle 4 is passed through the needle hole 18, and the needle 4 is fixed to the hub body 14 with an adhesive. The needle 4 passes through the recess 12 and protrudes forward from the mounting portion 11.

  The protective cover 6 can be formed of a conventionally known elastic material, for example, rubber such as silicone rubber or urethane rubber, or elastomer. The protective cover 6 is formed in a substantially cylindrical shape from these elastic materials.

  The protective cover 6 includes a base portion 21 that is attached to the attachment portion 11 of the hub 2, a bellows-like stretchable portion 22 that extends from the base portion 21, and a protective portion 23 that extends from the stretchable portion 22. The protection part 23 is formed thicker than the expansion / contraction part 22.

  The protective cover 6 is formed so as to be able to expand and contract by the action of a spring over its length direction. When an axial compressive force is applied to the protective cover 6, the protective cover 6 contracts, and when the compressive force is released, the protective cover 6 is restored to its original shape.

  As shown in FIG. 6, the base portion 21 of the protective cover 6 includes a first base portion 31 attached to the outer surface of the attachment portion 11 of the hub 2, and extends from the first base portion 31. And a second base 32 attached to the inner surface. A third base portion 33 is further extended from the second base portion 32, and the telescopic portion 22 is extended from the third base portion 33.

  The thickness of the protective portion 23 of the protective cover 6 is set to be thicker than the thickness of the stretchable portion 22. For example, the thickness of the protective portion 23 of the protective cover 6 can be 1.5 to 3.0 times the thickness of the stretchable portion 22.

  When the axial compressive force is not applied to the protective cover 6 (natural state), the tip of the needle 4 is located in the through hole 24 of the protective portion 23. When the length of the protection part 23 is 2 mm, the distal end of the needle 4 is preferably positioned within a range of 0.1 to 0.5 mm from the base end of the protection part 23. That is, the dimension from the tip of the needle 4 to the tip of the protective part 23 is 1.5 mm or more, preferably 1.8 mm or more.

  When the protective cover 6 is compressed, the tip of the needle 4 is exposed through the through hole 24 of the protective part 23. At that time, the stretchable part 22 and the protective part 23 of the protective cover 6 can be accommodated in the concave part 12.

  The projecting dimension of the needle 4 from the tip of the attachment portion 11 is set to a predetermined injection depth (depth of administration) for a drug solution to be injected into the skin.

  Hereinafter, the operation of the injection needle A of the present invention will be described.

  The protrusion 17 provided on the base 19 of the injection needle A of the present invention is attached to the tip of the syringe by a luer lock. By operating the syringe, the drug solution is sent into the drug solution storage section 20 of the injection needle A.

  As shown in FIGS. 6A to 6B, when the protective part 23 of the protective cover 6 is pressed against the skin S, the expansion / contraction part 22 of the protective cover 6 is compressed, and the protective part 23 of the protective cover 6 becomes the injection needle A. By moving to the hub 2 side, the needle tip is exposed and is inserted into the skin S. At the same time, the stretchable part 22 and the protective part 23 of the protective cover 6 are accommodated in the recess 12.

  Here, since the tip of the attachment portion 11 contacts the surface of the skin S, the size of the needle 4 entering the skin is regulated. Therefore, the drug solution can be administered to the target depth of the skin tissue.

  When the needle 4 is pulled out from the skin S after the medicinal solution is administered to a desired position on the skin tissue, the protective cover 6 is restored to the original state and disposed around the needle 4 as shown in FIG. The Since the protection part 23 of the protective cover 6 is located around the needle tip, the needle tip can be reliably protected by the protection part 23. Therefore, even when a finger or the like touches the protective portion 23 of the protective cover 6 by mistake, the finger does not touch the needle tip and be damaged.

  The present invention provides an injection needle that prevents an operator such as a doctor or nurse from accidentally piercing the tip of a used injection needle.

A Injection needle 2 Hub 4 Needle 6 Protective cover 11 Mounting portion 12 Recess 14 Hub body 21 Protective cover base 22 Protective cover extendable portion 23 Protective cover protective portion

Claims (5)

An injection needle having a hub, a needle attached to the hub so as to protrude from the tip of the hub, and a substantially cylindrical protective cover that covers the periphery of the needle,
A cylindrical attachment portion is provided at the distal end portion of the hub, and a concave portion having an opening on the distal end side is formed in the attachment portion.
The needle is arranged to pass through the recess,
The protective cover has a base attached to the attachment portion, a bellows-like stretchable portion extending from the base portion, and a protection portion extending from the stretchable portion,
The protective part is formed thicker than the stretchable part, and the tip of the needle is located in the protective part,
An injection needle in which the stretchable part and the protective part of the protective cover can be accommodated in the recess when the protective cover is compressed. The hub has a hub body through which a needle passes, a chemical solution storage portion provided at a base portion of the hub body, and the attachment portion provided at a distal end portion of the hub body,
The injection needle according to claim 1, wherein a luer lock projection that can be connected to a syringe is provided at a base portion of the hub body. The base portion of the protective cover includes a first base portion that is attached to an outer surface of the attachment portion of the hub, and a second base portion that extends from the first base portion and is attached to an inner surface of the attachment portion. Item 3. The injection needle according to Item 1 or 2. The injection needle according to any one of claims 1 to 3, wherein a thickness of the protective portion of the protective cover is 1.5 to 3.0 times that of the stretchable portion. The injection needle according to any one of claims 1 to 4, wherein a needle tip is disposed at a base portion of the protective portion of the protective cover, and the base portion of the protective portion is 0 to 20 percent with respect to the entire length of the protective portion.

Images