JP4848989B2 - Protector - Google Patents

Description

  The present invention relates to a protector used for protecting a needle tip of a needle punctured into a blood vessel during infusion or blood collection.

  When performing infusion or blood collection on a patient, an injection needle attached to the tip of a syringe, a needle attached to the tip of a tube connected to a container for infusion or blood collection, a blood vessel of the patient An indwelling needle having a resin needle placed on the outer periphery is used. Each of these needles has a sharp needle tip, and there is a possibility that an accidental puncture accident may occur due to the needle tip removed from the patient after use.

Regarding the disposal of needles after use, measures such as reinserting the needle into the packaging material that had stored the needle before use, or reinserting the needle tip into the cap that had covered the needle point before use Has been taken. However, even in these operations, it is necessary to pay close attention so that an accidental puncture accident caused by the needle tip does not occur, and it cannot be said that it is a measure for reducing the risk of an erroneous puncture accident.
Therefore, from the viewpoint of reducing such erroneous puncture accidents, in recent years, needles provided with an erroneous puncture prevention mechanism that protects a sharp needle tip without exposing it to the outside when the needle is removed from a patient have become widespread. I'm starting.

  As an accidental puncture prevention mechanism, for example, it has a plurality of fingers that are fixed on the needle so as to be slidable in the axial direction of the needle and that are biased inward at the tip as a protector that can accommodate the needle tip inside. A cylindrical protector (for example, refer to Patent Document 1) and a protector made of an elastic spring clip having walls on the front and rear sides (for example, refer to Patent Document 2 or 3) are known.

  These protectors have at least two openings on the needle tip side (tip side) and needle base side (base end side), and are arranged so that they can slide on the needle in the axial direction. Is done. After use of the needle, the protector is slid on the needle toward the distal end side, and the needle tip passes through the opening on the distal end side of the protector and is accommodated in the protector. At this time, as soon as the needle tip passes through the opening on the tip side, the opening is closed and the tip of the protector is biased inward so that the needle tip can be prevented from being exposed to the outside again from the tip of the protector. It has a part. For this reason, before using the needle, the tip of the protector is always in pressure contact with the outer peripheral surface of the needle, and this increases the sliding resistance of the protector that moves over the needle. It is increasing.

JP-A-9-99073 JP-T-2001-514943 Japanese Patent Laid-Open No. 2002-210005

The removal of the needle is usually performed by a medical worker with one hand, and it is preferable that the needle tip is protected at the same time that the needle is removed from the patient. However, if the force required to protect the needle tip increases, the needle tip protection cannot be performed by one-handed operation, so the needle tip cannot be protected immediately after removal, or the protector is completely moved to the position where the needle tip is protected. There is a risk that it will not be able to slide, or the needle tip may injure the patient's blood vessels and skin during removal.
Accordingly, an object of the present invention is to provide a protector in which the needle tip is protected without being exposed to the outside when the needle is removed, and the force required for protecting the needle tip is smaller than that of the prior art.

  As a result of intensive studies, the present inventors have divided the protector into two members, a protective member and a biasing member, so that the inward biasing force of the protector tip is not applied to the outer peripheral surface of the needle before the inner needle is removed. It has been found that the above-mentioned problems can be solved by configuring, and the present invention has been achieved.

That is, the present invention
(1) A protective member having an internal space that can accommodate the needle tip, an opening through which the needle can be inserted on the distal end side and the proximal end side, and capable of sliding on the needle in the axial direction of the needle, and an outer periphery of the protective member And a closing member slidably arranged from the proximal end to the distal end. The distal end of the protection member closes the opening on the distal end when the needle tip is accommodated in the internal space of the protection member. A protector for protecting the tip of the needle, which is provided with a displacement side wall that can be displaced inwardly, and the displacement side wall is displaced inward by disposing the closing member on the outer periphery of the distal end portion of the protection member;
(2) The protective member has a proximal wall having a proximal opening, a distal wall having a distal opening, and a side wall extending in the axial direction of a needle provided integrally with the proximal wall and the distal wall. The protector according to (1), wherein the displacement side wall is provided on a part of the side wall,
(3) The protector according to (2), wherein the protective member has a pair of opposing side walls, and one tip of the side wall is a displacement side wall.
(4) The protector according to (2), wherein the protection member has four side walls that surround the needle tip from four directions, and a pair of displacement side walls are provided at a pair of tip portions opposed to the side walls.
(5) The closing member is disposed on the outer periphery of the base end portion where the displacement side wall of the protection member is not provided before the needle tip is accommodated in the internal space of the protection member, and the needle tip is located inside the protection member. The outer periphery of the protective member is slid toward the distal end side when accommodated in the space, and is disposed on the outer periphery of the distal end portion provided with the displacement side wall of the protective member. (1) to (4) provided with locking means capable of preventing further sliding when the closing member is arranged on the outer periphery of the tip portion and holding the displacement side wall in a state displaced inward. The protector according to any one of the above,
(6) The said closure member is provided with the opening part which has an internal diameter which can penetrate the base end of the said protection member, and is arrange | positioned on the base end part outer periphery of the said protection member in a natural state of (1)-(5) The protector according to any one of the above,
(7) The closing member is an annular body, and the locking means is a claw projecting outward toward the proximal end and a claw projecting outward toward the distal end ( 6) The protector as described
(8) The closing member includes an opening having an inner diameter slightly smaller than an inner diameter necessary for inserting the proximal end of the protective member, and is urged inward by the inner periphery being expanded. The protector according to any one of (1) to (5), which is disposed on the outer periphery of the base end portion of the protection member in a state.
(9) The protector according to (8), wherein the closing member is an annular body made of an elastic material, and the locking means is at least one recess in which the closing member can be contracted by an urging force.
(10) The protector according to (8), wherein the closing member is an annular body partly cut, and the locking means is at least one recess in which the closing member can be contracted by an urging force. .

  Since the protector of the present invention is composed of two members, a protective member and a closing member, the inward biasing force is not directly applied to the outer peripheral surface of the needle unlike the conventional protector. Therefore, the sliding resistance of the protector that slides on the needle when the needle tip is protected is lowered, and the needle tip protecting operation can be easily performed. Also, when the protector is placed on the needle before use, the protector's inward biasing force is not directly applied to the outer peripheral surface of the needle, so there is no need to insert the needle through the protector's opening while resisting the biasing force. Smooth arrangement is possible.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings, but the present invention is not limited thereto.
FIG. 1 is a perspective view showing a state of the protector according to an embodiment of the present invention before accommodation of the needle tip, and FIG. 2 is a perspective view showing a state of the protector shown in FIG. 1 after accommodation of the needle tip. FIG. 3 is a perspective view of an injection needle equipped with the protector of the present invention shown in FIG. FIG. 4 is a perspective view showing a state of the protector according to another embodiment of the present invention before accommodation of the needle tip, and FIG. 5 is a perspective view showing a state of the protector shown in FIG. 4 after accommodation of the needle tip. Moreover, FIG. 6 is explanatory drawing which shows a mode that the protector shown in FIG. 1 accommodates a needle point. In the protector of the present invention, the distal end side means a needle tip side (left side in the figure) punctured by a patient, and the proximal end side means a needle proximal side (right side in the figure) connected to a syringe, a tube or the like.

  As shown in FIGS. 1 to 3, the protector 1 of the present invention includes a protective member 2 and a closing member 3. The protection member 2 includes an internal space 21 in which the needle tip 41 of the needle 4 can be accommodated, and the needle 4 is passed through the distal end side opening 22 and the proximal end side opening 23 in the axial direction of the needle 4. It can slide. The closing member 3 is disposed on the outer periphery of the protective member 2 and can slide from the proximal end portion to the distal end portion of the protective member 2.

  The protection member 2 includes a proximal end wall 24 having a proximal end opening 23, a distal end wall 25 having a distal end side opening 22, and an axial direction of a needle 4 provided integrally with the proximal end wall 24 and the distal end wall 25. And extending side walls 26. The internal space 21 that can accommodate the needle tip 41 is formed by the proximal end wall 24, the distal end wall 25, and the side wall 26. The internal space 21 may be a space that is completely shielded from the outside. Alternatively, it may be partially opened as shown. That is, the shape of the protection member 2 is not particularly limited as long as the needle 4 can be inserted into the distal end side opening 22 and the proximal end side opening 23 and the needle tip 41 can be accommodated in the internal space 21. Further, the distal end opening 22 does not need to be a hole provided in the distal end wall 25, and may be a groove provided for simply positioning the needle 4 at the inner end of the distal end wall 25. Furthermore, although the protection member 2 of the present invention is composed of a base end portion and a tip end portion, the boundary between them is not limited to the intermediate portion in the axial direction of the protection member 2, and can be changed as appropriate.

  Specific examples of the protective member 2 include those having shapes as shown in FIGS. The protective member 2 shown here has a square plate-like distal end wall 25 as well as a square plate-like base end wall 24, and a pair of side walls 26 facing from two opposite sides of the base end wall 24 are raised. It is installed. One side wall 26 is plate-shaped, and one end is provided integrally with the base end wall 24 and the other end is provided integrally with the tip end wall 25 so that the base end wall 24 and the tip end wall 25 face each other. Placed in. The other side wall 26 is also plate-shaped, and one end is provided integrally with the base end wall 24, but a displacement side wall 27 is provided at a part of the distal end portion of the side wall 26.

  The displacement side wall 27 is provided at the distal end portion of the protection member 2, and is provided at the distal end wall 25 when the needle tip 41 of the needle 4 is accommodated in the internal space 21 of the protection member 2. It is displaced inward so as to close the distal end side opening 22. The displacement side wall 27 includes, for example, as shown in FIGS. 1 to 3, a main body portion 271 provided continuously to the side wall 26 in a state along the outer side, and a closing portion 272 provided continuously to the distal end side of the main body portion 271. Consists of The main body portion 271 can be displaced inward by an external force, that is, can be bent. When the main body portion 271 is bent inward, the closing portion 272 closes the front end side opening 22 of the front end wall 25. The closing of the distal end side opening 22 does not need to be closed so that the distal end side opening 22 is sealed, but closes the needle tip 41 of the needle 4 so that it cannot protrude from the distal end side opening 22. If it is.

  The side wall 26 may be composed of four plate-like side walls surrounding the needle tip 41 from four sides in addition to the pair of opposed side walls shown in the figure, and may provide the protection member 2 having a substantially quadrangular prism shape. The displacement side wall 27 may be provided on the entire one end portion of the side wall 26 as in the specific examples shown in FIGS. 1 to 3, or one end portion of the side wall 26 is not shown. It may be provided in a part of. Alternatively, a plurality of displacement side walls 27 may be provided on the plurality of side walls 26.

  The displacement side wall 27 is displaced inward by the closing member 3. That is, when the closing member 3 slidably disposed on the outer periphery of the protective member 2 is disposed on the outer periphery of the distal end portion of the protective member 2, the displacement side wall 27 is displaced inward, and the needle is removed from the distal end side opening 22. The tip 41 is closed so that it cannot protrude. The closing member 3 is normally disposed on the outer periphery of the proximal end portion of the protective member 2 as shown in FIG. 1 before the needle tip 41 is accommodated in the internal space 21, and the needle tip 41 is accommodated in the internal space 21. When this is done, the outer periphery of the protective member 2 slides toward the distal end side and is disposed on the outer periphery of the distal end portion provided with the displacement side wall 27 as shown in FIG. Here, the proximal end portion of the protection member 2 refers to a portion closer to the proximal end than the distal end portion where the displacement side wall 27 is provided.

Other shapes of the protection member 2 of the present invention include a cylindrical side wall 26 so that the needle 4 can be completely accommodated, and a substantially cylindrical shape constituted by two or more side walls. Also good. Further, the outer periphery of the cross section perpendicular to the axis in the side wall 26 portion of the protection member 2 may be a polygonal shape or the like other than the circular shape. The outer peripheral shape of the cross section perpendicular to the axis in the side wall 26 portion of the protective member 2 and the inner peripheral shape of the closing member 3 are not necessarily the same, but the closing member 3 slides on the outer periphery of the protective member 2. It is necessary to have such an inner diameter.
Further, the closing portion 272 of the displacement side wall 27 of the protection member 2 is provided so as to protrude toward the proximal end side from the distal end portion of the displacement side wall 27, thereby preventing the needle tip 41 from protruding more effectively. it can.

  When the protective member 2 is entirely formed of the same material, a material capable of forming a displacement side wall 27 that is displaced inward by processing, for example, stainless steel, aluminum or an aluminum alloy, titanium or a titanium alloy, copper or copper Various metal materials such as alloys, polyolefins such as polyethylene, polypropylene, polybutadiene, ethylene-vinyl acetate copolymer, polyvinyl chloride, polyurethane, polystyrene, polymethyl methacrylate, polycarbonate, polyamide, polyethylene terephthalate, polybutylene terephthalate, etc. It is preferably formed from various resin materials such as polyester, acrylic resin, ABS resin, ionomer, polyacetal, polyphenylene sulfide, and polyether ether ketone.

  The protective member 2 formed from such a material can be formed by joining a resin material molded by injection molding or the like, a metal material molded by bending or the like, and ceramics. The joining method in this case is not particularly limited, and examples thereof include caulking, engagement by unevenness, adhesion using an adhesive, and melting. Moreover, the said protection member 2 can also be formed combining 2 or more types of the said material. For example, the strength of the displacement side wall 27 can be improved by attaching a member formed of a hard material such as ceramics to the inner wall of the displacement side wall 27. Here, when the base member of the protective member 2 is disposed in a state in which the closing member 3 disposed on the outer periphery is urged inward as will be described later, the urging force is directly applied to the needle 4. It must not be deformed so that it is not added.

  The closing member 3 disposed on the outer periphery of the protective member 2 has an inner diameter and an inner peripheral shape that can slide on the outer periphery of the protective member 2 as described above. The closing member 3 is a polyolefin such as polyethylene, polypropylene, polybutadiene, or ethylene-vinyl acetate copolymer, polyvinyl chloride, polyurethane, polystyrene, polymethyl methacrylate, polycarbonate, polyamide, polyethylene terephthalate, polyester such as polybutylene terephthalate, or acrylic. Various resin materials such as resin, ABS resin, ionomer, polyacetal, polyphenylene sulfide, polyether ether ketone, or various metal materials such as stainless steel, aluminum or aluminum alloy, titanium or titanium alloy, copper or copper alloy, ceramic, etc. It is formed from a hard material. The closing member 3 may be made of a rubber material such as natural rubber, isoprene rubber or butadiene rubber, or an elastic material such as a thermoplastic elastomer. The closing member 3 is formed into an annular body or an annular body partly cut by injection molding or the like.

  1-3, the closing member 3 provided in the protector 1 includes an opening having an inner diameter through which the proximal end of the protective member 2 can be inserted, and is disposed on the outer periphery of the proximal end portion of the protective member 2 in a natural state. An annular body. In the illustrated closing member 3, the outer periphery is circular, and the inner periphery is formed in a square shape in accordance with the outer peripheral shape of the cross section perpendicular to the axis of the side wall 26 portion of the protection member 2. However, the outer peripheral shape and the inner peripheral shape are not limited to these, and any shape that can slide in the axial direction on the outer periphery of the protection member 2 may be used. For example, the inner periphery may be a square shape. The thickness of the closing member 3 is not particularly limited, but it is necessary to have rigidity capable of sliding in the axial direction on the outer periphery of the protective member 2.

  From the state where the closing member 3 is disposed on the outer periphery of the proximal end portion of the protective member 2 shown in FIG. 1 to the state where it is disposed on the outer periphery of the distal end portion provided with the displacement side wall 27 shown in FIG. The outer periphery of the protection member 2 is slid to the tip side. When such a closing member 3 is disposed on the outer periphery of the tip as shown in FIG. 2, the sliding member 27 is prevented from sliding thereafter and the displacement side wall 27 is displaced inward. Possible locking means may be provided at the tip of the protection member 2.

  As the locking means, for example, as shown in FIGS. 1 to 3, a claw portion 51 projecting outward toward the proximal end side, and outward toward the distal end side at the proximal end side of the claw portion 51. What consists of the nail | claw part 52 protrudingly projected to is used. The closing member 3 slid on the outer periphery of the protective member 2 from the base end portion to the tip end portion passes over the claw portion 52 while urging the claw portion 52 inward, and comes into contact with the protruding end of the claw portion 51 to slide. It stops and is locked between the claw portion 51 and the claw portion 52. By providing this locking means, the front end side opening 22 is closed by the closing portion 272 so as to prevent the needle tip 41 accommodated in the internal space 21 of the protection member 2 from protruding again from the front end side. Can be held.

  Since the locking means holds the closing member 3 in a state where the displacement side wall 27 is displaced inward, the locking means is basically provided on the displacement side wall 27. When the parts 51 and 52 are configured, the claw part 52 on the proximal end side may be provided on the distal end side of the side wall 26. Further, the locking means may be provided at the tip of the side wall 26 where the displacement side wall 27 is not provided, facing the displacement side wall 27.

Another embodiment of the closing member 3 includes an opening having an inner diameter that is slightly smaller than the inner diameter required to pass through the proximal end of the protective member 2, and is attached inward by the inner periphery being expanded. Examples include those arranged on the outer periphery of the base end portion of the protective member 2 in a biased state. Such a closing member 31 is partly formed as shown in FIG. 4 or FIG. 5 formed from a material other than an elastic body such as a rubber material or an elastic material such as a thermoplastic elastomer, for example. Is a cut ring.
In the case of an annular body formed of the former elastic material, the inner periphery is expanded and disposed on the outer periphery of the proximal end portion of the protective member 2 while being urged inward, and is slid toward the distal end to be protected. When it is disposed on the outer periphery of the tip of the member 2, it is contracted by the biasing force to displace the displacement side wall 27 inward.
On the other hand, in the case of the annular body in which a part of the latter is cut, the cutting portion 311 is pushed and spread as shown in FIG. 4 and arranged on the outer periphery of the base end portion of the protective member 2 while being biased inward. When the sliding member 311 is slid toward the distal end side and disposed on the outer periphery of the distal end portion of the protection member 2, the cutting portion 311 contracts by being completely or slightly closed as shown in FIG. Displace to

  The closing member 31 disposed on the outer periphery of the proximal end portion of the protective member 2 in a state of being biased inwardly in this manner prevents the subsequent sliding when the sliding member 31 contracts by sliding toward the distal end side. The side wall 27 is locked in a groove 53 provided as a locking means that can hold the side wall 27 in a displaced state. Although at least one groove 53 is provided on the outer periphery of the front end of the protective member 2, it may be provided on either the side wall 26 or the displacement side wall 27. However, as shown in FIGS. Is provided, the closure member 31 is more securely locked to the protection member 2 in a non-slidable manner.

  In the protection member 2 of the present invention, before the needle tip 41 is accommodated in the internal space 21, the protection member 2 is maintained so that the closing member 3 is arranged on the outer periphery of the proximal end portion of the protection member 2. You may provide the 2nd latching means which latches the closure member 3 in the base end part. Examples of such second locking means include a pair of claw portions such as the claw portions 51 and 52. In addition, in the case of using a ring-shaped closing member 31 that is partially cut, a convex portion that is held in the cut portion 311 by further expanding the cut portion 311 may be provided. Unlike the locking means provided at the tip of the protective member 2 described above, the second locking means must be capable of easily releasing the locked state. Therefore, when the second locking means is a pair of claw portions, the height of the claw portion on the front end side is set to a minimum that can exert the function, or when the protrusion is provided, the front end side is tapered. It is necessary to consider setting the shape. By providing such second locking means, the patient can puncture the patient with the needle tip 41 with the protector 1 placed on the needle 4 as shown in FIG.

Next, how the protector 1 of the present invention houses the needle tip 41 will be described with reference to FIG.
As shown in FIG. 3, the protector 1 is inserted into a general injection needle composed of a needle 4 and a needle hub 6 before the needle 4 is inserted into the distal end side opening 22 and the proximal end side opening 23 of the protector 1 before use. Located on the needle 4. The protector 1 of the present invention is not limited to such an injection needle, but can also be used for a winged needle having a fixed wing attached to the needle hub 6 portion, an indwelling needle in which a resin outer needle is disposed on the outer periphery, and the like. . In the state before use shown in FIG. 6A, the protector 1 of the present invention does not directly apply the inward biasing force of the displacement side wall 27 or the closing member 3 to the outer peripheral surface of the needle 1. The top placement is done smoothly. After the protector 1 is arranged adjacent to the distal end side of the needle hub 6, the protector 1 is unevenly formed on the protector 1 or the needle hub 6 so as not to slide on the needle 4 until the operation of accommodating the needle tip 41 is performed. A holding mechanism such as engagement or caulking may be provided.

  When the needle tip 41 is protected by the protector 1 after the needle 4 is used, the protector 1 is attached to the needle 4 simultaneously with the operation of pulling the needle 4 out of the patient's blood vessel or immediately after the needle 4 is pulled out of the patient's blood vessel. Slide up to the tip side. At this time, the protector 1 of the present invention is arranged even if the displacement side wall 27 of the protection member 2 is not biased inward and the closing member 3 is not biased inward or is biased. Since the base end portion of the protective member 2 is not deformed by receiving the biasing force, no external force is applied on the needle 4. Therefore, the medical staff can slide the protector 1 with a much smaller force than before after using the needle 4.

  When the needle tip 41 of the needle 4 is accommodated in the internal space 21 of the protection member 2 as shown in FIG. 6B, the closing member 3 is slid on the protection member 2 toward the distal end side. When the closing member 3 reaches the distal end portion of the protection member 2, the displacement side wall 27 is displaced inward, and the distal end side opening 22 of the protection member 2 is closed as shown in FIG. 272 prevents the needle tip 41 from protruding toward the tip side.

  In order to prevent the needle tip 41 accommodated in the protector 1 from protruding from the proximal end side of the protector 1, the distal end portion of the needle 4 to which the protector 1 is attached cannot pass through the proximal end opening 23 of the protective member 2. It is preferable that a projection 42 having a large outer diameter is formed. When the needle 4 provided with the protrusion 42 is used as described above, the entire length of the protection member 2 is such that the needle tip 41 is more than the closing portion 272 when the protrusion 42 is engaged with the edge of the proximal opening 23. Is also set to be located on the proximal side.

It is a perspective view which shows the state before needle-tip accommodation of one Example of the protector of this invention. It is a perspective view which shows the state after needle | hook tip accommodation of the protector shown by FIG. It is a perspective view of an injection needle provided with the protector of the present invention shown in FIG. It is a perspective view which shows the state before needle-tip accommodation of the other Example of the protector of this invention. It is a perspective view which shows the state after needle tip accommodation of the protector shown in FIG. It is explanatory drawing which shows a mode that the protector shown by FIG. 1 accommodates a needle point.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Protector 2 Protection member 21 Internal space 22 Front end opening 23 Base end opening 24 Base end wall 25 Front end wall 26 Side wall 27 Displacement side wall 271 Main body part 272 Closure part 3,31 Energizing member 311 Cutting part 4 Needle 41 Needle tip 42 Projection part 51, 52 Claw 53 Groove 6 Needle hub

Claims (11)

A protective member having an internal space for accommodating the needle tip, a distal end opening and a proximal end opening through which the needle can be inserted, and capable of sliding on the needle in the axial direction of the needle; and a proximal end on the outer periphery of the protective member And a closing member slidably arranged from the tip to the tip,
The distal end portion of the protection member is provided with a displacement side wall so that the displacement side wall does not apply a biasing force to the needle when the closing member is disposed on the outer periphery of the proximal end portion of the protection member. It is arranged, when the needle tip is housed in the internal space of the protective member, an inner direction so as to close the front end side opening by pre Symbol closure member is disposed at the distal end outer periphery of the protective member A protector for protecting the needle tip that is displaced to the tip. The protective member includes a proximal wall having the proximal-side opening, and a distal wall having the distal end opening, integrally provided with said proximal end wall and said front end wall, a side wall extending in the axial direction of the needle The protector for protecting a needle tip according to claim 1, wherein the displacement side wall is provided on a part of the side wall. The protective member opposite has a pair of side walls, the needle tip protector of claim 2 wherein one of the tip portions of the side walls is the displacement sidewall. 3. The protector for protecting a needle tip according to claim 2, wherein the protection member has four side walls surrounding the needle tip from four sides, and a pair of displacement side walls are provided at a pair of tip portions opposed to the side wall. . Inside of the closure member, before the needle tip is housed in the internal space of the protective member is disposed on the outer periphery of the displacement side walls not provided with a base end portion of the protective member, the needle tip is the protective member is intended to be disposed on the outer periphery of the tip displacement side walls provided on the outer peripheral slides into the distal end side of the protective member of the protection member when it is accommodated in the space, the distal end portion of the protective member the needlepoint protector according to claim 1, locking means is provided which may block the subsequent sliding when the closure member is disposed at the distal end outer periphery. The closing member includes an opening having an inner diameter through which a proximal end of the protective member can be inserted, and is disposed on an outer periphery of the proximal end portion of the protective member in a state where no urging force is applied to the protective member. The protector for needlepoint protection in any one of 1-5. The closing member is an annular body having an opening having an inner diameter through which the proximal end of the protective member can be inserted , and the locking means is provided on the distal end side and a claw portion projecting outward toward the proximal end side. The protector for protecting a needle tip according to claim 5 , wherein the protector is a claw projecting outward. The closing member includes an opening having an inner diameter slightly smaller than an inner diameter necessary to pass through the proximal end of the protection member, and the closing member is urged in an inward direction when the inner periphery is expanded. The protector for protecting the needle tip according to any one of claims 1 to 5, wherein the protector is disposed on an outer periphery of a proximal end portion of the protective member. 9. The protector for protecting a needle tip according to claim 8, wherein the closing member is an annular body made of an elastic material, and the locking means is at least one recess into which the closing member can be contracted by an urging force. . 9. The protector for protecting a needle tip according to claim 8, wherein the closing member is an annular body partly cut, and the locking means is at least one recess into which the closing member can be contracted by an urging force. . The protector for protecting a needle tip according to any one of claims 1 to 10, wherein the proximal end side opening has a size in which a protrusion formed at a distal end portion of the needle cannot pass.

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