JP2002210005A - Protector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protector capable of being used by mounting on a normal needle having no special structure with a small size and a simple structure and having high safety in the case of a disposal treatment or the like. SOLUTION: The protector 1 comprises a protector body 3 formed substantially in an S shape formed by deforming a plate-like member having an elasticity, and a cover 4 for covering the body 3. The protector 1 is used by mounting at a piercing at a piercing fitment 2 having a needle tube 20. In a state in which the protector 1 covers a needle tip 21 of the tube 20, the protector 1 is elastically deformed so that a tilt angle of a first hole 11 formed at a first site 31 of the body 3 to the tube 20 becomes small, and a movement of the protector 1 to the tube 20 is inhibited by a frictional force between the inner surface of the hole 11 and an outer peripheral surface of the tube 20. A distal end of the body 3 is covered by a cover 4, and an operation for applying a tensile force A to the distal end of the body 3 is disturbed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protector mounted on a needle punctured in a blood vessel or the like.

[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, it is preferable that the used injection needle is stored in a hard and strong dedicated container that does not pierce the needle tip and is discarded. Since it is difficult to carry the device with the injection needle from the viewpoint of improving work efficiency, currently, measures have been taken such as disposing of the used injection needle with the needle covered with a cap.

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 An object of the present invention is to provide a compact and simple structure which can be used by attaching it to an ordinary needle body having no special structure, and which can be used after a simple operation. An object of the present invention is to provide a protector which can store the needle tip of the needle body and has high safety in disposal processing or the like.

[0008]

This and other objects are achieved by the present invention which is defined below as (1) to (5).

(1) A first posture which is relatively movable along a longitudinal direction of a needle body having a sharp needle tip at a tip, and a state where the needle body is covered with the needle tip of the needle body covered. A protector displaceable to a second position in which relative movement along the longitudinal direction is prohibited, wherein a main body formed by deforming an elastic plate member, and at least a part of the main body are formed. A first cover and a second hole through which the needle body can be penetrated. The body is formed with a needle tip on a needle tip side of the main body. A joining portion is formed, and in the first posture, the needle body passes through the first hole and the second hole, and the engaging portion is engaged with the needle body, From this state, the needle body is moved in the distal direction with respect to the needle body to release the engagement between the engagement portion and the needle body, thereby making the needle body And near the first hole and / or
Alternatively, the plate-shaped member near the second hole is elastically deformed so that the inclination angle of the plate-shaped member becomes smaller than that in the first posture, and the plate-like member becomes the second posture, whereby the inner surface of the first hole and And / or a frictional force is generated or increased between the inner surface of the second hole and the outer peripheral surface of the needle body, so that relative movement of the needle body along the longitudinal direction is prohibited. When an external force in the proximal direction and / or the distal direction is applied to the cover portion in the second posture,
And / or a plate-like member in the vicinity of the second hole having a means for applying a force such that their inclination angle with respect to the needle body becomes smaller. A protector having a function of preventing an operation of moving the distal end of the main body in the distal direction in the second posture.

(2) The main body has a substantially S-shape as a whole, the first hole is formed in the center of the main body, and the second hole is formed in the main body. The protector according to the above (1), which is formed on the base side of the needle.

(3) The cover portion has a penetrating portion through which the needle body can penetrate, and in the first posture, the needle body penetrates the penetrating portion, and from that state, the needle is formed. The tip of the plate-shaped member in the vicinity of the second hole with respect to the needle is moved to the first attitude by moving in a distal direction with respect to the body and disengaging the penetrating portion from the needle. The protector according to the above (1) or (2), which is elastically deformed to be smaller than at the time of (1).

(4) The protector according to any one of (1) to (3), wherein the cover portion is provided continuously from the plate-like member near the second hole.

(5) The cap according to any of (1) to (4), further comprising a cap member located between the engagement portion and the first hole and covering the needle tip of the needle body in the second posture. The protector according to any of the above.

[0014]

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

<First Embodiment> FIGS. 1 and 2 are partial cross-sectional side views showing a first embodiment in which the protector of the present invention is mounted on a puncture device (injection needle). In the following, the right side in FIGS. 1 and 2 will be described as “distal end”, the left side as “base end”, the upper side as “one end”, and the lower side as “other end”.

The protector 1 shown in FIGS. 1 and 2 is used by being attached to a puncture device 2. First, the configuration of the puncture device 2 will be described.

The puncture device 2 includes a needle tube (needle body) 20 having a sharp needle tip 21 at the distal end, and a hub 22 fixed to the proximal end of the needle tube 20.

The needle tube 20 is a hollow needle and is made of, for example, a metal material such as stainless steel, aluminum or an aluminum alloy, titanium or a titanium alloy. A sharp needle tip 21 is formed at the distal end of the needle tube 20. The shape of the needle tip 21 is not particularly limited, and in the present embodiment, has a blade surface inclined at a predetermined angle with respect to the axis of the needle tube 20.

At the base end of the needle tube 20, a hub 22 is fixed (fixed) in a liquid-tight manner, and the lumen of the needle tube 20 communicates with the inside of the hub 22.

Examples of a method for fixing the needle tube 20 to the hub 22 include methods such as caulking, fusion (heat fusion, high frequency fusion, and the like), adhesion with an adhesive, and the like.

The hub 22 is formed of a substantially cylindrical member.
It is preferably made of a transparent (colorless and transparent), colored transparent or translucent resin, and the internal visibility is secured.

The hub 22 has a tapered shape whose outer diameter and inner diameter gradually increase toward the base end. The tip of a syringe (not shown) is inserted and fitted into the tapered portion, for example, and the puncture device 2 is mounted on the syringe.

The material of the hub 22 is not particularly limited.
For example, polyethylene, polypropylene, polybutadiene, polyolefin such as ethylene-vinyl acetate copolymer, polyvinyl chloride, polyurethane, polystyrene, polymethyl methacrylate, polycarbonate, polyamide, polyester such as polyethylene terephthalate, polybutylene terephthalate, acrylic resin, ABS Various resin materials such as resin, AS resin, ionomer, polyacetal, polyphenylene sulfide, and polyetheretherketone are exemplified.

The protector 1 includes a protector body (main body) 3 formed by deforming (bending) a plate member having elasticity, and a cover 4 covering the protector body 3.
And

The protector main body 3 includes a first portion (brake portion) 21 located substantially at the center, a second portion 32 located at the needle base side (base end side), and a needle tip side (distal end side). A third portion 33 located, a first portion 31 and a second portion 32
And a front connection part 35 connecting one ends of the first part 31 and the third part 33 to each other. As a result, the protector body 3 has a substantially S shape as a whole.

In the first portion 31 of the protector body 3,
An approximately circular first hole 11 is provided, a second portion 32 is provided with a second hole 12, and a third portion 33 is provided with a third hole (engaging portion). ) 13 are provided. Each of the first hole 11, the second hole 12, and the third hole 13 is a hole through which the needle tube 20 can pass.

In the configuration shown in the drawing, a curved portion 36 that curves inward (toward the base end) is formed at the other end of the third portion 33.

The cover portion 4 is a portion provided so as to cover the protector main body 3 and has a pair of opposed side wall portions (side plates) 41, 41 and a connecting wall connecting the both side wall portions 41, 41. 42.

The side walls 41, 41 are respectively arranged substantially perpendicular to the plate-like member forming the protector body 3. That is, the side wall portions 41, 41 are installed approximately in parallel, and a space 43 is formed between them.

In the space 43, the first portion 31, the third portion 33, and the front connection portion 35 of the protector body 3 are provided.
Is inserted and stored. Also, a protector 1 to be described later
In the second posture (the state shown in FIG. 2), the bending portion 36 is housed in the space 43 in addition to the above. That is, the side wall portions 41, 41 cover the above-described portion of the protector body 3 from the side.

The connecting wall 42 is formed continuously from one end of the second portion 32 so as to bend (or curve) from one end of the second portion 32 and extend substantially in the distal direction. That is, the connecting wall 42 covers the protector main body 3 from one end side. The connecting wall 42 is formed by the side walls 41, 4
1 are connected to each other and are supported. With such a configuration, the cover portion 4 has a substantially “U” shape in a front view.

Further, in the configuration shown in the figure, the connecting wall 42 is positioned with respect to the needle tube 20 so that the distance from the needle tube 20 gradually increases toward the distal end in accordance with the inclination of the front connection portion 35 in the second position described later. It is provided at an angle.

By providing such a cover portion 4, when the protector 1 covers the needle tip 21 of the needle tube 20, the blood (body fluid) attached around the needle tip 21 is touched by a finger or the like. Can be prevented, and contamination by blood (body fluid) can be effectively prevented.

When the puncture device 2 is used (when puncturing a living body or the like), the protector 1 has the posture shown in FIG. 1, ie, the first hole 11, the second hole 12, and the third hole. 13 is set to a posture in which the needle tube 20 penetrates (inserts) (this posture is hereinafter referred to as a “first posture”). In the first posture, the protector 1 is movable with respect to the needle tube 20 along the longitudinal direction. Normally, as shown in FIG. 1, the puncture device 2 is in a state where the protector 1 is located at the base end of the needle tube 20 (this state is hereinafter referred to as “used state”).
Use

In the configuration shown in the drawing, the first posture
The part 31, the second part 32 and the third part 33 are
Each is substantially perpendicular to the needle tube 20, and the rear connection portion 34 and the front connection portion 35 are substantially parallel to the needle tube 20, respectively. Thus, in the first posture, the angle formed between the first portion 31 and the rear connection portion 34 is substantially a right angle.

On the other hand, in the natural state of the protector 1 (a state in which no external force is applied), the angle formed between the first portion 31 and the rear connecting portion 34 is set smaller than the state shown in FIG. . That is, the protector 1
Is attached to the needle tube 20 in a state where the part 31 and the rear connection part 34 are deformed (elastically deformed) so as to open.

Due to this deformation, the protector 1 moves the needle tube 20
In this state, the first portion 31 is urged in a direction such that the inclination angle (the angle indicated by θ _{1 in} FIG. ₁ and θ ₁ ′ in FIG. 2) with respect to the needle tube 20 decreases. . In other words, the portion of the protector 1 between the first portion 31 and the rear connection portion 34 is directed in such a direction that the inclination angle of the first portion 31 with respect to the needle tube 20 is reduced by its elasticity. It is a biasing means for biasing.

Here, the inclination angle of the first portion 31 with respect to the needle tube 20 can be expressed by two sizes depending on which side of the angle formed by the first portion 31 and the needle tube 20 is selected. In the present specification, the “inclination angle of the first portion 31 with respect to the needle tube 20” refers to 90 ° when in the second posture.
An angle that is less than ° (smaller angle). That is, in the present embodiment, the angles are indicated by θ _{1 in} FIG. ₁ and θ ₁ ′ in FIG. Hereinafter, this angle is referred to as a “first portion inclination angle”.

In the first position shown in FIG. 1, the needle tube 20 passes through the third hole 13 formed in the third portion 33, and the third hole 13 and the needle tube 20 are engaged. As a result, the protector 1 is prevented from being deformed by the urging force of the urging means so as to reduce the first part inclination angle. As described above, the first part inclination angle θ ₁ in the first posture is , Are kept almost at right angles. In other words,
The third hole 13, in the first position, by engaging the needle tube 20 and forms an engagement portion defining a first site inclination angle theta ₁ at approximately right angles (inclination defining means).

The engaging portion is not limited to a through-hole such as the third hole 13 and can define the first part inclination angle by engaging with the needle tube 20 in the first posture. Anything is acceptable. That is, in addition to the through-hole, the engaging portion may be, for example, a hook-like portion having a part missing in the circumferential direction, or a needle tip after passing through the needle tip 21 and being disengaged from the needle tube 20. It may be constituted by a shutter-shaped part or the like that covers 21 from the front end side.

From such a use state (first posture),
The protector 1 is moved in the distal direction with respect to the needle tube 20, and when the needle tip 21 passes through the third hole 13 of the third portion 33, the engagement between the needle tube 20 and the third hole 13 is released. .
Thereby, the protector 1 is elastically moved by the urging force of the urging means to the posture shown in FIG.
Say “second posture”. ).

That is, in the second position, the protector 1
Is displaced (deformed) so that the first portion 31 rotates counterclockwise in FIG. 1 with respect to the rear connection portion 34 (the needle tube 20), as compared with the first posture. Thus, the first portion inclination angle of is smaller than that in the first position, and has a theta ₁ '<theta ₁ becomes theta _1'.

Accordingly, the third portion 33, the front connecting portion 35, and the bending portion 36 are also connected to the rear connecting portion 34 (the needle tube 2).
0), the needle tip 21 of the needle tube 20 is displaced (rotated).
Is covered by the curved portion 36. The state where the protector 1 covers the needle tip 21 of the needle tube 20 in this way, that is, the state shown in FIG. 2 is hereinafter referred to as a “needle tip storage state”. In this stowed state, the stylus 2
1 is inserted in the space 43.

In such a second posture (the needle tip stored state), the first portion 31 of the protector 1 functions as a brake for the needle tube 20 so that the protector 1
The relative movement of the needle tube 20 along the longitudinal direction is prohibited (prevented). That is, the first portion inclination angle becomes smaller than that in the first posture by the urging force of the urging means, so that the inner surface of the first hole 11 is pressed against the outer peripheral surface of the needle tube 20 and the first hole is pressed. The frictional force between the inner surface of the needle tube 11 and the outer peripheral surface of the needle tube 20 is generated or increased. This friction force,
It acts on the protector 1 as a braking force and inhibits (prevents) the movement of the protector 1 along the longitudinal direction of the needle tube 20.

With such a configuration, in the puncture device 2, once the needle point is stored, the needle point 21 of the needle tube 20 does not protrude beyond the protector 1. In this way, erroneous piercing can be prevented during disposal processing and the like, and safety is high.

Further, since the protector 1 is prohibited from moving in the longitudinal direction with respect to the needle tube 20 by the braking action of the first portion 31, a special structure for locking the protector 1 to the needle tube 20 (for example, a local structure). The hub 22 and the protector 1
Or a structure that connects strings with a string) is unnecessary. Accordingly, the distal end portion of the needle tube 20 can have a smooth outer peripheral surface that is not subjected to special processing or the like, and does not cause a decrease in strength, an increase in piercing resistance, or the like. Further, for the same reason, the protector 1 can be used in combination with an existing needle body, and has high versatility.

The first part inclination angle θ in the first posture
₁ is not particularly limited, but is preferably equal to or greater than 60 °, and more preferably substantially a right angle as in the present embodiment. The inner diameter D of the first hole 11 is preferably different from the outer diameter d of the needle tube 20, but is preferably about 0.01 to 1 mm larger than the outer diameter d of the needle tube 20. More preferably, it is larger by about 0.5 to 0.2 mm.

The first part inclination angle θ in the first posture
₁ and the inner diameter D of the first hole 11 is in the above range, so that the inner surface of the first hole 11 and the needle tube 2 in the second posture are
The frictional force (the braking force acting on the protector 1) between the outer peripheral surface of the needle tube 0 and the outer peripheral surface of the needle tube 0 increases, and the relative movement of the needle tube 20 along the longitudinal direction is more reliably prohibited (blocked).

In the present invention, the first hole 11
Indicates that the part in the circumferential direction is missing (C-shaped, etc.)
(The same applies to the second hole 12).

The shape of the second hole 12 and the third hole 13 is not limited to a circle as long as it can slide with respect to the needle tube 20. From the viewpoint of reducing the sliding resistance in the posture, the inner diameter D of the first hole 11 is preferably about 0.05 to 1 mm.

The preferred value of the thickness of the plate-like member (first portion 31) forming the protector main body 3 varies depending on the constituent material thereof, the outer diameter of the needle tube 20, and the like.
It is preferably about 0.5 to 2 mm, and 0.06 to 0.1 mm.
More preferably, it is about 2 mm. In the above range, when the thickness is relatively thick, the braking force acting on the protector 1 in the second position and the protection of the needle tip 21 are particularly excellent, and when the thickness is relatively thin, Workability and ease of sliding with respect to the needle tube 20 in the first posture are particularly excellent.

The constituent material of the protector 1 is not particularly limited. For example, various metal materials such as stainless steel, aluminum or aluminum alloy, titanium or titanium alloy, copper or copper-based alloy, polyethylene, polypropylene, polybutadiene, ethylene -Polyolefin such as vinyl acetate copolymer, polyvinyl chloride, polyurethane, polystyrene, polymethyl methacrylate, polycarbonate, polyamide, polyethylene terephthalate, polyester such as polybutylene terephthalate, acrylic resin, ABS resin, AS resin, ionomer,
Various resin materials such as polyacetal, polyphenylene sulfide, and polyether ether ketone are exemplified, and various metal materials are preferable. Further, two or more of the above materials may be used in combination.

Further, the protector body 3 and the cover 4 may be connected by combining separate components or may be formed integrally.

The cover 4 of the protector 1 has a function of preventing an operation of moving the distal end (the third portion 33 and the like) of the protector body 3 in the distal direction in the second posture.

That is, for example, when a finger or the like applies a pulling force as shown by an arrow A in FIG. 2 to the distal end portion (the third portion 33 or the like) of the protector main body 3, Since the side (the third portion 33 and the like) is covered with the side walls 41 and 41 of the cover 4, it cannot be touched with a finger or the like, and therefore, this operation cannot be performed. Can not.

Unlike such a configuration, when the above-described pulling force A can be applied to the distal end portion (the third portion 33, etc.) of the protector body 3, this pulling force A
Is transmitted to the first portion 31 via the front connection portion 35, and acts so as to increase the _first portion tilt angle θ ₁ ′. Thereby, the frictional force between the inner surface of the first hole 11 and the outer peripheral surface of the needle tube 20 (braking force acting on the protector 1)
May decrease, and the protector 1 may be detached from the needle tube 20.

On the other hand, in the protector 1, as described above, since the cover 4 is provided, the operation of applying an external force such as the pulling force A is hindered. There is an advantage that separation can be prevented.

On the other hand, the cover part 4 is
Of the protector body 3 by inserting, for example, a rod-shaped object into the space 43 from the front end side in the second posture, since the front end portion (the third portion 33 and the like) is not covered from the front end side. It is possible (if deliberate) to exert a proximally directed external force on the distal end.

In such a case, that is, when the distal end portion (the third portion 33 or the like) of the protector body 3 is pressed in the proximal direction in the second posture, the first portion 31 (the first portion 31) is pressed. (A plate-shaped member near the hole 11) is provided with a means for applying a force such that the first portion inclination angle θ ₁ ′ becomes smaller.

That is, when a pressing force as shown by an arrow B in FIG. 2 is applied to the distal end portion (the third portion 33 and the like) of the protector main body 3, the pressing force B is transmitted through the front connecting portion 35. The first portion 31 is transmitted to the first portion 31 to reduce the _first portion inclination angle θ ₁ ′. Thereby, the first
The frictional force (braking force acting on the protector 1) between the inner surface of the hole 11 and the outer peripheral surface of the needle tube 20 further increases to oppose the pressing force B, and the movement of the protector 1 is more reliably inhibited (blocked). ).

Therefore, even if an external force such as the pressing force B acts on the distal end portion of the protector main body 3, the needle tip 21 is more reliably prevented from projecting beyond the protector 1, particularly High safety. Therefore, in the second posture, the distal end portion of the protector body 3 (the third portion 33 and the like).
Even if is not covered from the tip side by the cover part 4, no problem occurs.

The protector 1 is configured such that when an external force in the proximal direction or the distal direction acts on the cover portion 4 in the second posture, the second portion 32 (the plate-like portion near the second hole 12). There is a means for applying a force such that the inclination angle of the (member) with respect to the needle tube 20 becomes small.

That is, for example, when an external force in the direction of the tip acts on the cover part 4 by applying a tensile force as shown by an arrow C in FIG. Second through the portion 41 and the connecting wall 42
And acts so as to reduce the inclination angle of the second portion 32 with respect to the needle tube 20 (the angle indicated by β in FIG. 2).

Thus, the inner surface of the second hole 12 and the needle tube 2
A frictional force (braking force acting on the protector 1) between the outer peripheral surface of the protector 1 and the outer peripheral surface of the protector 1 is generated or increased to oppose the tensile force C.
That is, in addition to the first portion 31, the second portion 32 also exerts a braking action on the needle tube 20, and more reliably prohibits (blocks) the movement of the protector 1. In addition, protector 1
Similarly, when a pressing force as shown by an arrow E in FIG. 2 is applied to the base end portion of the needle tube 2 of the second portion 32,
It acts so that the inclination angle β with respect to 0 becomes small.

Conversely, for example, when a pressing force as shown by an arrow B in FIG.
Is transmitted to the second portion 32 via the side wall portion 41 and the connecting wall 42, and acts to reduce the inclination angle (the angle indicated by α in FIG. 2) of the second portion 32 with respect to the needle tube 20.

Thus, the inner surface of the second hole 12 and the needle tube 2
A frictional force (braking force acting on the protector 1) between the outer peripheral surface of the protector 1 and the outer peripheral surface of the protector 1 is generated or increased to oppose the pressing force D.
That is, in addition to the first portion 31, the second portion 32 also exerts a braking action on the needle tube 20, and more reliably prohibits (blocks) the movement of the protector 1.

The pressing force D is transmitted from the second portion 32 to the first portion 31 via the rear connecting portion 34,
It also acts so that the first part inclination angle θ ₁ ′ becomes smaller.

Thus, even when an external force acts on the cover 4 in the proximal direction or the distal direction, the needle tip 21 projects beyond the protector 1 or the protector 1
Is more reliably prevented from coming off from the needle tube 20, and the safety is particularly high.

It should be noted that even if the protector 1 moves slightly in the proximal direction due to a particularly strong pressing force D, the needle tip 21 abuts on the inner surface of the curved portion 36.
Does not protrude beyond the protector 1.

Next, an example of a method of using the puncture device 2 and the protector 1 will be described in detail.

[1] Put the puncture device 2 and the protector 1 in the use state (the state shown in FIG. 1), insert the distal end protruding portion of the syringe (not shown) into the base end of the hub 22, and fit the puncture device. Attach 2 to the syringe.

[2] In this state, the needle tube 20 is punctured into the blood vessel (living body) of the patient, and the plunger provided in the syringe is operated to collect blood or inject the drug solution into the patient.

[3] When the collection of the blood or the injection of the drug solution is completed, the needle tube 20 is removed from the blood vessel of the patient.

[4] Next, the protector 1 is moved toward the distal end with respect to the needle tube 20 by using the other hand or tweezers or the like of the hand supporting the syringe.

Here, in the conventional puncture operation, the needle tube 20 is capped after the needle tip 21 is removed from the living body, but the needle tube 20 is inserted from the needle tip 21 into the opening at one end of the cap. When the needle tip 21 is out of the opening, the finger picking the cap is moved to the needle tip 2 of the needle tube 20.
There was a risk that an accident such as erroneous puncturing would occur. However, in the present invention, since the protector 1 moves toward the distal end of the needle tube 20 to cover the needle tip 21, it is possible to effectively prevent the erroneous puncture as described above.

[5] When the needle tip 21 of the needle tube 20 passes through the third hole 13 due to the movement of the protector 1 in the distal direction, the engagement between the needle tube 20 and the third hole 13 is released, and the protector 1 Is deformed elastically (by its own elasticity)
The second posture shown in FIG.

When the protector 1 is in the second position, the first
By the braking action of the part 31 of the protector 1,
The movement of the needle tube 20 along the longitudinal direction is prohibited (prevented),
Before the needle tip 21 passes through the first hole 11, the needle tip 20 stops (rests) with respect to the needle tube 20. As a result, the protector 1 and the puncture device 2 are brought into the stowage state shown in FIG.

[6] When the needle tip 21 of the needle tube 20 is housed in the protector 1, the tip end protruding portion of the syringe is pulled out from the hub 22, and the puncture device 2 and the syringe are separated. Then, the puncture device 2 and the syringe are separately provided for disposal. Alternatively, the syringe may be discarded with the puncture device 2 attached.

At this time, the puncture device 2 is, as described above,
The needle tip 21 is housed in the protector 1 and the needle tip 21
Does not protrude beyond protector 1 and protector 1 does not come off needle tip 21. This prevents an accident such as accidentally stabbing a finger or the like with the needle point 21 at the time of disposal or the like.

<Second Embodiment> FIG. 3 is a partial cross-sectional side view showing a second embodiment (in use state of a puncture device) in which the protector of the present invention is mounted on a puncture device (injection needle), and FIG. ,
It is a fragmentary sectional side view showing a 2nd embodiment (needle stowage state) in the state where a protector of the present invention was attached to a puncture device (injection needle). In the following description, the right side in FIGS. 3 and 4 is referred to as “distal end”, the left side as “base end”, the upper side as “one end”, and the lower side as “other end”.

Hereinafter, the second embodiment of the present invention will be described with reference to these drawings.
Although the embodiment will be described, the description will focus on differences from the first embodiment described above, and description of similar items will be omitted.

The cover 4 in the protector 1 'of the present embodiment comprises a pair of side walls 41, 41 and both side walls 41, 41.
A connecting wall 42 connecting the connecting walls 41 and a tip wall 44 provided continuously from the connecting wall 42 are provided.

The distal end wall 44 is formed so as to extend from the distal end of the connecting wall 42 toward the other end.
1, 41 are connected to each other. That is, the distal end wall 44 is located at the distal end of the protector body 3 (the third portion 33).
Etc.) from the tip side.

The tip wall 44 is formed with a fourth hole 14 (through portion) through which the needle tube 20 can pass.

When the puncture device 2 is used, the protector 1 ′ connects the second hole 12, the first hole 11, the third hole 13, and the fourth hole 14 to the needle tube 20 as shown in FIG. Are in a state of penetrating in this order (first posture).

In the illustrated configuration, in this first position, the distal end wall 44 is substantially perpendicular to the needle tube 20, and the connecting wall 42 is approximately parallel to the needle tube 20. The angle formed by the second portion 32 and the rear connection portion 34 (the angle indicated by θ ₃ in FIG. 3) is substantially a right angle.

In such a protector 1 ′, in its natural state (state in which no external force is applied), the second portion 32
The angle between the rear connection portion 34 and the rear connection portion 34 is set to be larger than the angle shown in FIG. That is, in the illustrated configuration, the angle formed between the second portion 32 and the rear connection portion 34 in a natural state (a state in which no external force is applied) is θ ₃ ′.
(See FIG. 4).

In the first position, the protector 1 ′ is deformed (elastically deformed) so that the second portion 32 and the rear connection portion 34 are closed by the needle tube 20 penetrating the fourth hole 14. ). That is, the fourth hole 14, in the first position, by engaging the needle tube 20, defining means for defining the inclination angle with respect to the needle tube 20 of the second portion 32 to θ ₃ <θ ₃ 'becomes theta ₃ It has become.

The protector 1 'is moved from the first posture (the state shown in FIG. 3) to the distal end with respect to the needle tube 20, and
When the needle tip 21 passes through the fourth hole 14 and the third hole 13, the engagement between these holes and the needle tube 20 is released. As a result, the protector 1 'is elastically displaced (deformed) to the second posture shown in FIG.

In the second position, the protector 1 '
The second portion 32 and the cover portion 4 are displaced relative to the rear connection portion 34 (the needle tube 20) so as to rotate counterclockwise in FIG. Thus, in the second position, the inclination angle with respect to the needle tube 20 of the second portion 32 from theta ₂ when the first position, theta ₂ '<theta ₂ becomes theta _2'
Has changed.

Thus, the inner surface of the second hole 12 is
0 and pressed against the inner surface of the second hole 12 and the needle tube 20.
Generates or increases a frictional force with the outer peripheral surface of the protector 1 ', and the frictional force acts on the protector 1' as a braking force.

That is, in the present embodiment, in addition to the first portion 31 (the first hole 11), the second portion 32
The (second hole 12) also functions as a brake unit that inhibits (prevents) the movement of the protector 1 'along the longitudinal direction of the needle tube 20. Thereby, even when a particularly strong external force acts on the protector 1 'in the proximal direction or the distal direction, the needle tip 21 projects beyond the protector 1', or the protector 1 'comes off the needle tube 20. Can be more reliably prevented.

<Third Embodiment> FIG. 5 is a partial cross-sectional side view showing a third embodiment (in use state of a puncture device) in which the protector of the present invention is mounted on a puncture device (injection needle), and FIG. ,
It is a fragmentary sectional side view showing a 3rd embodiment (needle stowage state) in the state where a protector of the present invention was attached to a puncture device (injection needle). In the following description, the right side in FIGS. 5 and 6 is referred to as “distal end”, the left side as “base end”, the upper side as “one end”, and the lower side as “other end”.

Hereinafter, the third embodiment of the present invention will be described with reference to these drawings.
Although the embodiment will be described, the description will focus on differences from the first embodiment described above, and description of similar items will be omitted.

The protector 1 ″ of the present embodiment has the cylindrical member 5 as a cap member for covering the needle tip 21 of the needle tube 20 in the second position, and the protector body 3 is replaced with the curved portion 36. It is the same as the protector 1 of the first embodiment except that the tip sealing portion 37 is formed.

The tubular member 5 as the cap member is
The needle tube 20 has a cylindrical shape having a hollow portion 51 through which the needle tube 20 can pass (penetrate), and the first hole formed in the third portion 33 of the protector body 3 and the first portion 31 formed in the first portion 31. It is located between the hole 11.

The base end surface of the cylindrical member 5 is an inclined surface 52 inclined with respect to a plane perpendicular to the needle tube 20. The direction of inclination of the inclined surface 52 is the same as the direction of inclination of the first portion 31 in the second posture (needle stowed state) shown in FIG.

The protector 1 ″ has a cylindrical member 5.
Is provided with a rotation preventing means (not shown) for preventing the rotation with respect to the protector main body 3.

The distal end sealing portion 37 of the protector body 3 is formed in a flat plate shape continuously from the other end of the third portion 33. In the illustrated configuration, the distal end sealing portion 37 is provided to be slightly bent in the proximal direction with respect to the third portion 33.

In such a protector 1 ″, in the first position shown in FIG. 5 (the use state of the puncture device 2), the needle tube 20 has the second hole 12, the first hole 11, and the cylindrical member 5. Of the hollow portion 51 and the third hole 13 in this order.

In the second position (needle stowed state) of the protector 1 ″ shown in FIG. 6, the needle tip 21 is located in the hollow portion 51 of the tubular member 5, and It is covered.

In the second position, the distal end opening 53 of the tubular member 5 is covered and sealed by the distal end sealing portion 37 of the protector body 3.

With this configuration, in this embodiment,
In the second posture, the whole (entire surface) of the needle tip 21 is covered with the tubular member 5 and the tip sealing portion 37, so that blood (body fluid) remaining around and inside the needle tip 21 is prevented from dripping ( Control), and contamination by blood (body fluid) can be effectively prevented.

The tubular member 5 also has a function as a lateral displacement prevention member for preventing lateral displacement of the needle tip 21 in the second posture. That is, the provision of the tubular member 5 prevents the needle tip 21 from shifting in the lateral direction (a direction perpendicular to the longitudinal direction) in the second posture. Accordingly, in the present embodiment, in the state where the needle tip is stored, even when, for example, a strong external force acts on the protector 5 in the lateral direction, the protrusion of the needle tip 21 can be more reliably prevented. High safety.

When such pressing force acts on the protector body 3 in the second posture as shown by the arrow F in FIG. 6, that is, the distal end of the protector body 3 is moved in the proximal direction. Means (inclination surface 52) that, when pressed, exerts a force on the first portion 31 (a plate-like member near the first hole 11) so that the first portion inclination angle θ ₁ ′ becomes smaller. Having.

That is, the pressing force F is transmitted to the first portion 31 via the inclined surface 52 of the tubular member 5 and acts so as to reduce the _first portion inclination angle θ ₁ ′. As a result, the frictional force between the inner surface of the first hole 11 and the outer peripheral surface of the needle tube 20 (braking force acting on the protector 1 '') further increases to oppose the pressing force F, and the protector 1 '' Movement is more reliably prohibited (blocked). Therefore, even when the pressing force F is applied, the protrusion of the needle tip 21 beyond the protector 1 ″ is more reliably prevented, and the safety is particularly high.

The constituent material of the tubular member 5 is not particularly limited. For example, various metal materials such as stainless steel, aluminum or aluminum alloy, titanium or titanium alloy, copper or copper-based alloy, polyethylene, polypropylene, polybutadiene , Polyolefins such as ethylene-vinyl acetate copolymer, polyvinyl chloride, polyurethane,
Polyester such as polystyrene, polymethyl methacrylate, polycarbonate, polyamide, polyethylene terephthalate, polybutylene terephthalate, acrylic resin, ABS resin, AS resin, ionomer, polyacetal, polyphenylene sulfide, polyether ether ketone, etc., and various rubbers Materials, various thermoplastic elastomers, and the like, and these materials may be used in combination of two or more.

In the case where the constituent material of the tubular member 5 includes various rubber materials or various thermoplastic elastomers, the distal end sealing portion 37 is positioned with respect to the distal end opening 53 of the cylindrical member 5 in the second position. This makes it possible to more effectively prevent blood (body fluid) remaining around and inside the needle tip 21 from dripping down.

Although the protector of the present invention has been described with reference to the illustrated embodiments, the present invention is not limited to these embodiments, and each part constituting the protector may have any configuration capable of exhibiting the same function. Can be replaced with

For example, the main body of the protector is not limited to a substantially S-shape as a whole, but may be, for example, a substantially “U” -shape.

Further, the main body of the protector may be constituted by a plurality of parts. For example, a plate-shaped brake portion and an urging member (spring) for urging the brake portion in a direction in which the inclination angle with respect to the needle body decreases may be configured as separate components.

Further, in the illustrated embodiment, the cover portion
Although the one that covers the main body of the protector from the side and one end side has been described, in the present invention, the cover may cover the main body of the protector from any direction. What is necessary is just to cover a part from at least one direction.

Further, the protector of the present invention is not limited to various types of injection needles, and can be used by being attached to an indwelling needle assembly used in combination with an indwelling needle (outer needle), for example.

[0114]

As described above, according to the present invention, the used needle body can be covered with the protector quickly and safely by a simple operation. It is possible to provide a puncture tool which is extremely excellent in terms of hygiene and safety, without an accident of piercing a finger or the like.

Further, according to the present invention, the above-mentioned effect can be achieved with a simple structure and an extremely small protector, and the protector fits in a small space at the base of the needle in a use state. Therefore, it is easy to secure a space for installing the protector, and the present invention can be applied to various punctures. Further, for the same reason, the puncture device provided with the protector of the present invention has an operational feeling comparable to that of the conventional puncture device having no protector, and has high operability.

Further, the protector of the present invention can be used by being attached to a normal needle body having no special structure. Therefore, it can be used in combination with an existing needle.

Further, the cover that covers the body of the protector prevents the blood (body fluid) adhering around the needle tip from touching with a finger or the like in the stylus storage state, thereby preventing blood (body fluid) contamination. (Suppression).

Further, the cover has a function of preventing the operation of moving the distal end of the main body of the protector in the distal direction in the second posture (the state of storing the needle tip).
It is possible to more reliably prevent the needle tip from protruding beyond the protector and the protector from coming off the needle body.

In the case where a cap member for covering the needle tip of the needle body is provided in the second position, it is possible to prevent (suppress) blood (body fluid) remaining around and inside the needle tip from dripping. It is possible to more effectively prevent blood (body fluid) contamination.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view showing a first embodiment (in use state of a puncture device) in a state where a protector of the present invention is mounted on a puncture device (injection needle).

FIG. 2 is a partial cross-sectional side view showing the first embodiment (with the needle point stored) in a state where the protector of the present invention is mounted on a puncture device (injection needle).

FIG. 3 is a partial cross-sectional side view showing a second embodiment (in use of a puncture device) in a state where the protector of the present invention is mounted on a puncture device (injection needle).

FIG. 4 is a partial cross-sectional side view showing a second embodiment (a needle tip stored state) in a state where the protector of the present invention is mounted on a puncture device (an injection needle).

FIG. 5 is a partial cross-sectional side view showing a third embodiment (in use of a puncture device) in a state where the protector of the present invention is mounted on a puncture device (injection needle).

FIG. 6 is a partial cross-sectional side view showing a third embodiment (needle stowed state) in a state where the protector of the present invention is mounted on a puncture device (injection needle).

[Explanation of symbols]

 1, 1 ', 1' 'protector 11 1st hole 12 2nd hole 13 3rd hole 14 4th hole 2 Puncturing tool 20 Needle tube 21 Needle tip 22 Hub 3 Protector main body 31 1st part 32 2nd Part 33 third part 34 rear connection part 35 front connection part 36 curved part 37 tip sealing part 4 cover part 41 side wall part 42 connection wall 43 space 44 tip wall 5 tubular member 51 hollow part 52 inclined surface 53 tip opening

Claims (5)

[Claims] 1. A first attitude which is relatively movable along a longitudinal direction of a needle body having a sharp needle tip at a tip, and a longitudinal direction of the needle body in a state of covering the needle tip of the needle body. A protector displaceable to a second position in which relative movement along a direction is prohibited, wherein the protector covers at least a part of the main body formed by deforming an elastic plate-shaped member. A first hole and a second hole through which the needle body can be penetrated are formed in the main body, and engagement with the needle body is formed on a needle tip side of the main body. A needle portion penetrates through the first hole and the second hole, and the engaging portion engages with the needle body in the first posture; By moving from the state in the distal direction with respect to the needle body to release the engagement between the engagement portion and the needle body, the needle body The plate member in the vicinity of the first hole and / or the vicinity of the second hole is elastically deformed so as to be smaller than in the first posture to be in the second posture. As a result, a frictional force is generated or increased between the inner surface of the first hole and / or the inner surface of the second hole and the outer peripheral surface of the needle body, and the relative movement along the longitudinal direction of the needle body occurs. When an external force in the proximal direction and / or the distal direction is applied to the cover portion in the second posture, the vicinity of the first hole and / or the second hole A means for applying a force to the plate-shaped member so that their inclination angle with respect to the needle body is smaller, wherein the cover portion has a tip end of the main body portion in the second posture. Has a function to prevent operation to move in the direction A protector characterized in that: 2. The main body portion has a substantially S-shape as a whole, the first hole is formed in a central portion of the main body portion, and the second hole is formed in the main body portion. The protector according to claim 1, wherein the protector is formed on a needle base side. 3. The cover portion has a penetrating portion through which the needle body can penetrate, and in the first posture, the needle body penetrates the penetrating portion, and the needle body changes from that state. , The engagement between the penetrating portion and the needle body is released and the inclination angle of the plate-like member near the second hole with respect to the needle body is set to the first posture. The protector according to claim 1, wherein the protector is elastically deformed so as to be smaller than when the case is. 4. The protector according to claim 1, wherein said cover portion is provided continuously from a plate-like member near said second hole. 5. A cap member located between the engaging portion and the first hole, the cap member covering the needle tip of the needle body in the second posture. Protector.