JP2002011098A - Needling instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a needling instrument that has a simple structure and of which the needle tip can be installed by simple operation after user and has a high safety in the waste disposal. SOLUTION: The needling instrument 1 comprises a needle body 2 which has a sharp needle tip 21 at the top end, a hub 3 which is fixed at the base side of the needle body 2, a protector 4 which is installed relatively movably with the needle body 2 and can house the needle tip 21 of the needle body 2, a string (regulating means) which regulates the movement of the protector 4 toward the top end, and a coil spring (energizing member) which energizes the protector 4 toward the top end when the protector 4 is positioned at the vicinity of the hub 3. When the protector 4 has housed the needle tip 21 of the needle body 2, the string 5 extends and pulls the shutter member 47 to the second position and regulates (prevents) the protector 4 to move further toward the top end.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a puncture device used for puncturing a blood vessel, for example, for infusion or blood collection.

[0002]

2. Description of the Related Art When collecting blood or administering a drug solution to a patient, an injection needle is attached to the tip of a syringe, and the injection needle is punctured into a patient's blood vessel. Such injection needles
It is composed of a needle (needle body) having a sharp needle tip at the distal end, and a hub fixed to the proximal end of the needle.

When blood is collected from a patient, a plunger provided in the syringe is operated to draw blood into the syringe. In addition, when administering a drug solution to a patient, the plunger is operated to inject the drug solution stored inside the syringe into a blood vessel of the patient.

[0004] By the way, the injection needle and the syringe after the blood collection and the administration of the medicinal solution to the patient are no longer necessary, and therefore are separately disposed of, respectively. There is a possibility that an accident such as sticking a finger or the like with a needle point may occur. In particular, since blood adheres and remains on the surface and inside of the needle, infection may occur due to such a stab.

[0005] Therefore, measures have been taken to dispose of used syringe needles by placing caps on the needles and discarding them.

However, even when such a needle is covered with a cap, it is necessary to prevent blood adhering and remaining on the needle from reaching the operator's hand or sticking the operator's hand with the needle point. Must pay close attention to
There is a problem that a great deal of trouble is required for disposal of the used injection needle.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a puncture device which has a simple structure, can store the needle tip of a used needle body by a simple operation, and has a high safety in disposal and the like. To provide tools.

[0008]

This and other objects are achieved by the present invention which is defined below as (1) to (14).

(1) A needle body having a sharp needle tip at a distal end portion, a hub fixed to a base end portion of the needle body, and the needle body installed movably relative to the needle body. A protector body having a needle body passage through which the needle body can be inserted, a first position at which the needle body can be inserted into the needle body passage, and a needle of the needle body. A protector provided with a shutter member displaceable to a second position for preventing passage of the needle body, and a restriction for restricting further movement of the protector toward the distal end when the protector stores the needle tip of the needle body. A puncturing device, wherein the regulating device has a function of displacing the shutter member from the first position to the second position.

(2) The shutter member includes the first member.
The puncture device according to the above (1), wherein the puncture device is present in the protector at the position of (1) and the second position.

(3) The displacement of the shutter member from the first position to the second position according to the above (1) or (2), which is performed by moving the shutter member at a predetermined angle with respect to the needle body passage. Puncture device.

(4) The protector main body has a hole through which the shutter member can move, the hole is provided so as to cross the needle body passage, one end is located inside the protector main body, and the other end is provided. The puncture device according to the above (3), wherein the puncture device is open to the outside of the protector body.

(5) The puncture according to the above (4), wherein the shutter member is formed of an elastically deformable plate-like member, and the plate-like member is bent or curved to be installed in the hole. Utensils.

(6) The restricting means is constituted by a linear body or a band-like body, and is connected to the shutter member and the hub or the needle body according to any one of the above (1) to (5). The puncture device described.

(7) The protector body has a passage hole through which the linear body or the band body can pass.
The puncture device according to 1.

(8) When the protector has housed the needle tip of the needle body, the linear body or the band-like body expands and pulls the shutter member to the second position,
The puncture device according to the above (6) or (7), which further restricts movement of the protector toward the distal end.

(9) When the protector is located near the hub, the linear member or the band member is wound around the hub and / or the outer peripheral portion of the protector in a relaxed state. The puncture device according to any one of (1) to (8).

(10) When the protector is located near the hub, the linear body or the band-like body is housed in the protector in a relaxed state according to the above (6) to (8). The puncture device according to any one of the above.

(11) When the shutter member is in the second position, the shutter member occupies 50% or more of the cross-sectional area of the needle body passage.
The puncture device according to any one of 0).

(12) The shutter member is set so that the width in the vertical direction with respect to the needle passage is larger than the inner diameter of the needle passage.
The puncture device according to any one of 1).

(13) The device according to the above (), further comprising an urging member installed between the hub and the protector, the urging member for urging the protector toward the distal end when the protector is located near the hub. The puncture device according to any one of 1) to (12).

(14) The puncture device according to any one of (1) to (13), further comprising an engagement means for engaging the protector and the hub.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a puncture device according to the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.

<First Embodiment> FIGS. 1 and 2 are longitudinal sectional views showing a first embodiment in which the puncture device of the present invention is applied to an injection needle. In the following description,
The right side in FIGS. 1 and 2 is called a “proximal end”, and the left side is called a “distal end”.

The puncture device 1 shown in FIGS. 1 and 2 has a needle body 2 having a sharp needle tip 21 at the distal end, a hub 3 fixed to the base end of the needle body 2, and a needle body 2. The protector 4 is provided so as to be relatively movable, and can store the needle tip 21 of the needle body 2. When the protector 4 stores the needle tip 21 of the needle body 2, the protector 4 further moves toward the distal end. And a coil spring (biasing member) 6 for biasing the protector 4 toward the distal end when the protector 4 is located near the hub 3.
Hereinafter, the configuration of each unit will be described.

The needle body 2 is a hollow needle and is made of a metal material such as stainless steel, aluminum or aluminum alloy, titanium or titanium alloy.
A sharp needle tip 21 is formed at the tip of the needle body 2. The shape of the needle tip 21 is not particularly limited. In the present embodiment, the needle tip 21 has a shape having a blade surface inclined at a predetermined angle with respect to the axis of the needle body 2.

A hub 3 is fixed (fixed) to the proximal end of the needle body 2 in a liquid-tight manner, and the inner cavity of the needle body 2 communicates with the inside of the hub 3.

As a method of fixing the needle body 2 to the hub 3, for example, caulking, fusion (heat fusion, high frequency fusion, etc.),
Examples of the method include bonding with an adhesive.

The hub 3 is made of a substantially cylindrical member, and is preferably made of a transparent (colorless and transparent), colored transparent or translucent resin, and the internal visibility is secured.

The hub 3 has a tapered shape whose outer diameter and inner diameter gradually increase toward the base end. For example, the tip of a syringe (not shown) is inserted into the tapered portion, and the puncture device 1 is mounted on the syringe.

A flange 31 protruding in a ring shape is formed on the outer periphery of the base end of the hub 3. For example, during the operation of attaching the puncture device 1 to the syringe, this operation can be performed by hooking a finger on the flange 31.

A step 32 is formed at the tip end of the hub 3. The step portion 32 is inserted into a space 43 formed inside a base end side of the protector 4 described later.

In the vicinity of the center of the hub 3 in the longitudinal direction,
A convex portion 33 protruding outward is formed. The convex portion 33 engages with a concave portion 44 formed in the protector main body 41 described later.

The hub 3 and a protector body 41 to be described later
The constituent material is not particularly limited, for example, polyethylene, polypropylene, polybutadiene, polyolefin such as ethylene-vinyl acetate copolymer, polyvinyl chloride, polyurethane, polystyrene, polymethyl methacrylate, polycarbonate, polyamide, polyethylene terephthalate, Various resin materials such as polyester such as polybutylene terephthalate, acrylic resin, ABS resin, AS resin, ionomer, polyacetal, polyphenylene sulfide, and polyether ether ketone are exemplified.

The protector 4 includes a protector main body 41 formed of a substantially cylindrical member, and a shutter member (shutter means) 47 described later. A needle body passage 42 through which the needle body 2 is inserted is provided at the center of the protector body 41.
Are formed to penetrate from the base end side to the front end of the protector main body 41.

The cross-sectional shape of the needle passage 42 is circular, and the inner diameter of the needle passage 42 is equal to the outer diameter of the needle body 2 or
Or it is set to a slightly larger value.

At the base end side of the protector main body 41, a space 43 in which the diameter of the needle body passage 42 is increased is formed.
The step portion 32 of the hub 3 is inserted into the hub 3.

Further, at the base end of the protector body 41,
A concave portion 44 having a shape corresponding to the convex portion 33 is formed.
The protector 4 is located closest to the proximal end, and the projection 33 and the recess 44 are engaged. Thereby, the hub 3 and the protector 4
Means the state of bonding, that is, the state shown in FIG.
This state is called an “assembled state”. ).

The concave portion 44 and the convex portion 33 constitute engaging means for engaging the protector 4 with the hub 3. The engagement between the convex portion 33 and the concave portion 44 is performed by rotating the protector 4 relative to the hub 3, for example,
The hub 3 can be released by fixing the hub 3 and rotating the upper part of the protector 4 toward the back side of the paper in FIG. The puncture device 1 is used in this assembled state.

A hole 45 is formed in the protector main body 41 so as to be substantially perpendicular to the needle body passage 42 and substantially cross the needle body passage 42 (in the vertical direction in FIGS. 1 and 2). ing. A shutter member 47 described later is movably housed in the hole 45.

The hole 45 has an upper side surface 451 located on the upper side in FIGS. 1 and 2 so as to substantially coincide with the upper part of the needle body passage 42. Thereby, the shutter member 47
(Movement range upward).

On the other hand, the hole 45 has an opening 452 on the lower side in FIGS. 1 and 2 that opens outside the protector body 41. The shutter member 47 can be installed by being inserted into the hole 45 from the opening 452. For this reason, when installing the shutter member 47 in the protector main body 41 (hole 45), the protector main body 41 can be integrally formed without being divided into two or more members, thereby reducing the number of parts. Is advantageous.

In the inside of the protector main body 41, there is formed a passage hole 46 through which a string (linear body) 5 to be described later can pass. The passage hole 46 is formed such that its inside communicates with the inside of the hole 45, and the side opposite to the hole 45 is open to the outside of the protector main body 41.

The shutter member 47 has a function of preventing (preventing) the needle tip 21 of the needle body 2 located on the proximal side from the hole 45 from passing in the distal direction.

The shutter member 47 is housed in the hole 45 by bending an elastically deformable plate-like member into a substantially V-shape, and is provided at a predetermined angle with respect to the needle body passage 42 (in this embodiment, substantially at a predetermined angle). At right angles).

The end of each of the shutter members 47 is pressed against the inner surface of the hole 45 by its own elastic force. For this reason, the shutter member 47 is
2 is reliably prevented from falling off.

The shutter member 47 has a first position (position shown in FIG. 1) where the needle body 2 can be inserted (penetrated) through the needle body passage 42 and a second position for preventing the needle body 2 from passing through the needle tip 21. 2 (position shown in FIG. 2) can be moved (displaced) in the hole 45. At the first position and the second position, both exist in the protector body 41 (protector 4). ing.

That is, in the first position, the shutter member 47 is located in the hole 45 below the needle passage 42 (see FIG. 1), and in the second position, the hole 45 intersecting with the needle passage 42 is located. (See FIG. 2).

When the shutter member 47 is in the second position, it is preferable that the shutter member 47 occupies about 50% or more of the cross-sectional area of the needle body passage 42, and occupies the entirety. Is more preferred. Accordingly, the shutter member 47 can more reliably prevent (prevent) the movement of the needle body 2 in the tip direction of the needle tip 21.

Further, the needle passage 42 of the shutter member 47
1 (in FIGS. 1 and 2, the length in the direction perpendicular to the paper surface) is set larger than the inner diameter of the needle body passage 42. Thereby, while the shutter member 47 is moving from the first position to the second position, it is prevented that the shutter member 47 enters the needle body passage 42 by mistake. Therefore, the movement of the needle body 2 in the direction of the tip of the needle tip 21 can be more reliably prevented (prevented).

The constituent material of the shutter member 47 is the needle tip 2
1 may be any as long as it can block the passage of 1, for example, polyethylene, polypropylene, polybutadiene, polyolefin such as ethylene-vinyl acetate copolymer, polyvinyl chloride, polyurethane, polystyrene, polymethyl methacrylate, polycarbonate, Polyester such as polyamide, polyethylene terephthalate, polybutylene terephthalate, acrylic resin, A
BS resin, AS resin, ionomer, polyacetal,
Examples include various resin materials such as polyphenylene sulfide and polyether ether ketone, and various metal materials such as stainless steel, aluminum alloy, copper or copper-based alloy, titanium and titanium alloy.

The shape of the shutter member 47 is not limited to the one shown in the figure, and may be, for example, a member formed to be curved in a substantially U-shape. That is, the shutter member 47 may be any member as long as it prevents the needle body 2 from moving in the tip direction of the needle tip 21 and prevents the hole 45 from being pulled out of the opening 452. .

Near the top of the shutter member 47, one end of a string (restriction means) 5 composed of a linear body is fixed.
The string 5 passes through the passage hole 46 and the other end is fixed to the hub 3.

The string 5 has a function of further restricting the protector 4 from moving toward the tip when the needle tip 21 of the needle body 2 is stored (see FIG. 2).

That is, the protector 4 is connected to the needle tip 2 of the needle body 2.
When 1 is stored, the string 5 expands and pulls the shutter member 47 to the second position. At this time, the vicinity of the top of the shutter member 47 abuts on the upper side surface 451 of the hole 45, and the upward movement is restricted.

The string 5 has such a length that the protector 4 can be almost completely extended when the protector 4 houses the needle tip 21 of the needle body 2.

For this reason, when the needle tip 21 of the needle body 2 is stored, the protector 4 is further restricted (prevented) from moving toward the distal end.

As described above, the string 5 not only functions as a regulating means but also has a function to move (displace) the shutter member 47 from the first position to the second position.

As shown in FIG. 1, when the protector 4 is located near the hub 3, that is, when the puncture device 1
In the assembled state, the string 5 is wound around the outer periphery of the protector 4 (the protector body 41) in a relaxed state.

The method of fixing the string 5 to the shutter member 47 and the hub 3 includes, for example, embedding,
A method such as fusion or adhesion with an adhesive can be used.

Examples of the constituent material of the string 5 include polyethylene, polypropylene, polybutadiene,
Polyolefins such as ethylene-vinyl acetate copolymer, polyvinyl chloride, polyurethane, polystyrene, polycarbonate, polyamide, polyethylene terephthalate,
Polyester such as polybutylene terephthalate, polyacetal, resin materials such as polyphenylene sulfide,
Fiber materials such as carbon fiber and cotton thread, processed fiber materials such as nonwoven fabrics and woven fabrics, synthetic fibers, natural fibers, and various metal materials can be used.

In the assembled state of the puncture device 1, the string 5 in the relaxed state is replaced with the outer peripheral portion of the protector 4,
It may be wound around the outer periphery of the hub 3, or may be wound around both the outer periphery of the protector 4 and the outer periphery of the hub 3.

A coil spring 6 is provided between the hub 3 and the protector 4 as an urging member.

When the protector 4 is located near the hub 3, that is, when the puncture device 1 is assembled, the coil spring 6 is installed in a compressed state in the space 43 and on the outer peripheral portion of the step portion 32. The two ends thereof are in contact with the hub 3 and the protector body 41, respectively. Thus, the coil spring 6 urges the protector 4 toward the distal end.

On the other hand, when the engagement between the convex portion 33 and the concave portion 44 is released, the coil spring 6 is extended by its own elastic force to move the protector 4 toward the distal end. Thereby, the protector 4 can store the needle tip 21 of the needle body 2 more reliably and smoothly.

Note that such a coil spring 6 can be omitted as necessary. In this case, protector 4
May be moved in the direction of the distal end by gripping the protector body 41 with a hand.

In such a puncture device 1, the shutter member 47 is installed in the protector main body 41 (the protector 4) and moves only within the protector main body 41. The string 5 is wound around the outer periphery of the protector 4 when not needed (in an assembled state). With such a configuration, for example, in an operation of collecting blood or administering a medical solution to a patient, or an operation of storing the needle tip 21 of the needle body 2 in the protector 4, the shutter member 47 or the string 5 is moved by the operator's hand or the like. Is prevented from getting in the way. For this reason, it is possible to prevent the operability of the puncture device 1 from being reduced.

Next, an example of a method of using the puncture device 1 will be described in detail with reference to FIGS.

First, the puncture device 1 is assembled (state shown in FIG. 1), and a syringe (not shown) is attached to the base end of the hub 3.
Is inserted, and the puncture device 1 is attached to the syringe. In this state, the needle body 2 is punctured into a blood vessel (vein or artery) of the patient, and a plunger provided in the syringe is operated to collect blood or inject a drug solution into the patient.

Next, when the collection of the blood or the injection of the drug solution is completed, the needle body 2 is extracted from the blood vessel of the patient.

Thereafter, the hub 3 is gripped and fixed by hand, the protector 4 is gripped by the other hand, and the upper part of the protector 4 is rotated with respect to the hub 3 toward the back side of the paper in FIG. Thereby, the engagement between the convex portion 33 and the concave portion 44 is released.

At this time, the coil spring 6 in the compressed state
Moves the protector 4 toward the distal end by the elastic force when returning to the original shape. Since the string 5 is wound around the outer circumference of the protector 4, the protector 4 moves toward the distal end while rotating with respect to the needle body 2. Thereby, the winding of the string 5 around the outer periphery of the protector 4 is gradually released.

When the protector 4 further moves toward the distal end, the hole 45 passes through the needle tip 21 of the needle body 2. At substantially the same time, the string 5 expands, pulls the shutter member 47 at the first position, and moves (displaces) to the second position.
Let it. At this time, the vicinity of the top of the shutter member 47 contacts the upper side surface 451 of the hole 45. The string 5 is almost completely extended (see FIG. 2). This prevents (prevents) the protector 4 from further moving toward the distal end.

As described above, when the shutter member 47 moves to the second position, even if the needle tip 21 of the needle body 2 attempts to move in the distal direction, the shutter member 47 comes into contact with the needle tip 21 and further moves in the distal direction. Can not move to

When the needle tip 21 of the needle body 2 is stored in the protector 4, the syringe attached to the hub 3 is removed.
The puncture device 1 and the syringe are separated. The puncture device 1 and the syringe are separately provided for disposal. In the puncture device 1, the needle tip 21 is stored in the protector 4, and in particular, since the needle tip 21 does not protrude from the tip of the protector 4 and the protector 4 does not come off from the needle tip 21, Accidents such as a person who performs disposal processing accidentally stabs a finger or the like with the needle point 21 are prevented.

<Second Embodiment> Next, a second embodiment of the puncture device of the present invention will be described.

FIGS. 3 and 4 are longitudinal sectional views showing a puncture device according to the second embodiment. Hereinafter, the puncture device 1 shown in FIGS. 3 and 4 will be described focusing on the differences from the first embodiment, and the description of the same items will be omitted.

The puncture device 1 of the second embodiment is the same as the first embodiment except that the configuration of the hole 45 and the passage hole 46 and the installation position of the string 5 are different.

That is, the hole 45 and the passage hole 46 are formed at a predetermined angle with respect to the needle body passage 42. That is, the shutter member 47 is configured to move at a predetermined angle with respect to the needle body passage 42. With such a configuration, the first member 47
The movement (displacement) from the position to the second position is performed more reliably and smoothly.

The passage hole 46 is formed such that the side opposite to the hole 45 is open to the space 43 of the protector body 41. Further, the passage hole 46 has an enlarged diameter portion 461 formed to increase in diameter toward the space 43 side.

As shown in FIG. 3, when the puncture device 1 is in the assembled state, the relaxed string 5 is stored in the enlarged diameter portion 461.

The string 5 is disposed between the needle body 2 and the coil spring 6 as shown in FIG.
7 and the hub 3 are connected.

With this configuration, the same operation and effect as those of the first embodiment can be obtained.

The puncture device according to the present invention has been described with reference to the illustrated embodiments. However, the present invention is not limited to these embodiments, and each part constituting the puncture device may have any function that can exhibit the same function. Can be replaced with the one having the configuration described above.

In particular, the restricting means is not limited to the one shown in the figure, and may be, for example, a belt-like body. Further, one end thereof may be fixed to a predetermined position of the needle body, for example, instead of the hub.

The puncture device of the present invention can be applied not only to various types of injection needles but also to, for example, an indwelling needle assembly used in combination with an indwelling needle (outer needle).

[0087]

As described above, according to the present invention, the needle tip of the needle body can be stored in the protector with a simple structure and a simple operation. Further, the needle point once stored in the protector is reliably prevented from protruding again from the distal end of the protector, and the safety is high in disposal processing or the like.

In particular, since the shutter member and the regulating means do not interfere, the operability is excellent, for example, in the operation of collecting blood or administering a drug solution to the patient, or in the operation of storing the needle tip of the needle in the protector.

When the urging member is provided, the needle tip of the needle body can be more reliably and smoothly stored in the protector.

[Brief description of the drawings]

FIG. 1 shows a first example in which the puncture device of the present invention is applied to an injection needle.
It is a longitudinal section showing an embodiment (assembly state).

FIG. 2 shows a first example in which the puncture device of the present invention is applied to an injection needle.
It is a longitudinal section showing an embodiment (in the state where a protector stored a needle tip).

FIG. 3 is a longitudinal sectional view showing a second embodiment (assembled state) of the puncture device of the present invention.

FIG. 4 is a longitudinal sectional view showing a second embodiment of the puncture device of the present invention (the protector stores the needle tip).

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 puncture device 2 needle body 21 needle tip 3 hub 31 flange 32 step portion 33 convex portion 4 protector 41 protector body 42 needle body passage 43 space 44 concave portion 45 hole 451 upper side surface 452 opening 46 passing hole 461 enlarged diameter portion 47 shutter member 5 String 6 coil spring

Claims (9)

[Claims] 1. A needle body having a sharp needle tip at a distal end portion, a hub fixed to a base end portion of the needle body, A protector body having a needle body passage through which the needle body can be inserted, a first position at which the needle body can be inserted into the needle body passage, and a needle tip of the needle body. A protector provided with a shutter member that can be displaced to a second position for preventing passage of the needle body, and a restricting unit that further restricts the protector from moving toward the distal end when the protector stores the needle tip of the needle body. A puncturing device, wherein the restricting means has a function of displacing the shutter member from the first position to the second position. 2. The puncture device according to claim 1, wherein the shutter member is present in the protector at the first position and the second position. 3. The puncture device according to claim 1, wherein the displacement of the shutter member from the first position to the second position is performed by moving the shutter member at a predetermined angle with respect to the needle body passage. 4. The protector body has a hole through which the shutter member can move, the hole is provided to cross the needle body passage, one end is located inside the protector body, and the other end is provided. The puncture device according to claim 3, which is open to the outside of the protector body. 5. The puncture device according to claim 1, wherein the restricting means is formed of a linear body or a band-shaped body, and connects the shutter member to the hub or the needle. . 6. When the protector stores the needle tip of the needle body, the linear body or the band-like body expands and pulls the shutter member to the second position, and the protector further moves to the tip end. The puncture device according to claim 5, wherein the puncture device regulates movement in a direction. 7. The puncture device according to claim 1, wherein the shutter member is configured to occupy 50% or more of a cross-sectional area of the needle passage when in the second position. . 8. A biasing member installed between the hub and the protector, the biasing member biasing the protector toward the distal end when the protector is located near the hub. 8. The puncture device according to any one of items 7 to 7. 9. The puncture device according to claim 1, further comprising an engagement means for engaging said protector and said hub.