JP2007312982A - Medical needle with needle cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medical needle with a needle cover by which the winged needle can be easily, safely and securely stored in the cover without cumbersome operation. <P>SOLUTION: The medical needle with the needle cover is constituted of the cylindrical needle cover having a front portion 2, a middle abdominal portion and a rear portion 4 in series in a longitudinal direction of a cylindrical body and constituted by forming an opening in a bottom portion of the middle abdominal portion and a slit portion in a rear portion of the same and the winged needle constituted by securing the pair of wing portions to both the sides of a needle base implanting the needle of the front portion of the needle base and securing a tube to the rear portion of the needle base. The winged needle is slidably stored and protected in the needle cover, and the winged needle stored in the needle cover is secured by (a) securing an engaging portion to the tube or (b) securing the engaging portion to the rear portion of the needle base. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a winged needle such as PSV (Pediatric Scalp Vein) set and AVF (Arteriovenous Fistula) set used for dialysis, infusion and blood transfusion. More particularly, the present invention relates to an improvement in a needle with a wing with a needle cover, and to an invention in which operability is improved while maintaining the reliability and safety of the needle.

  In recent years, the spread of infectious diseases such as viral hepatitis and AIDS that have been transmitted through medical needles contaminated with the blood and body fluids of carriers, and at medical facilities, infections caused by false puncture of medical personnel engaged in blood transfusions and dialysis Is a problem. In addition, there is a risk that a waste disposal worker may accidentally stab a finger or the like during work due to a contaminated needle.

For this reason, in particular, several winged needles with a needle cover for safely storing a used medical needle have been proposed.
The present inventors have proposed a novel winged needle with a needle cover housed in a needle cover having a pair of wing-like stoppers protruding on both sides of the middle abdomen (see Patent Document 1). In this invention, the winged needle after use is housed in the needle cover, and then both wings of the winged needle are bent upward so that the wings cross and lock the wing-shaped stopper. Thus, the winged needle does not protrude beyond the needle cover.

  Further, the present inventors relate to the winged needle with the needle cover, and fix the needle by holding the tube connected to the needle base of the winged needle in the groove formed in the rear part of the needle cover. It has also been proposed to perform more reliably (see Patent Document 2).

  However, in these proposed winged needles, the locking operation by the intersection of both wing portions and the wing-shaped stopper is troublesome and requires considerable skill. For an operator who is not particularly dexterous with a large hand, the operation of bending both wings of the wing-shaped needle upward and the operation of locking both the wings with the wing-shaped stopper of the needle cover have not been easy.

  Liu has also proposed a medical needle in which a needle is retractably housed in a winged-equipped sheath on the sheath (guard) side (see Patent Document 3). .) Specifically, as shown in FIGS. 3 to 5, the medical needle includes a screw-like upper connection portion 11 and an annular lower connection portion 12 on the tubular body 10 behind the needle base 31. Is formed. When the needle 32 is housed in the winged sheath 4, the lower connecting portion 12 moves over the rear end 411 of the winged sheath 4 and moves out of the sheath, and the upper connecting portion 11 is moved to the winged sheath 4. Screwed onto the rear end 411 of the attached sheath 4.

  In the invention described in Patent Document 3, when the needle 32 is housed in the winged sheath 4, the lower connecting portion 12 first performs an operation of getting over the rear of the winged sheath 4, and the upper connecting portion 11 is further attached to the winged sheath. Since a double operation of screwing behind the sheath 4 has to be performed, the operation is troublesome.

  Liu has also proposed a medical needle that can be stored in a safety slide sleeve (see Patent Document 4). Specifically, as shown in FIGS. 1 to 5, the medical needle has a plurality of wing-shaped guide ribs 12 formed on the tubular body 10 behind the needle base 31. . When the injection needle 3 is housed in the safety slide sleeve 4, the guide rib 12 gets over the inwardly extending latching flange 411 at the rear (bottom) of the safety slide sleeve 4 and is locked to the rear wall surface of the safety slide sleeve 4. .

  In the invention described in Patent Document 4, this needle does not have a wing in the first place, and cannot perform an operation such as infusion while being accommodated in the sleeve. Further, when the used injection needle 3 is housed in the safety slide sleeve 4, since the plurality of wing-shaped guide ribs 12 have to get over the rear of the safety slide sleeve 4, a considerably strong force is required for the operation. There is difficulty in operability.

  Similarly, although not related to the winged needle, the needle N and the needle base holding the needle formed with the slanted thick part 6, the single slanted thick part 4, and several slender parts therebetween, A cap-integrated disposable injection needle formed of a cap 10 that is formed with an inward flange that engages with the slender portion and that engages with the needle base has been proposed (see Patent Document 5).

  In the invention described in Patent Document 5, when the needle N is accommodated in the needle cap 10, the both sides of the sloping thick part 6 and the single sloping thick part 4 get over the back of the needle cap 10 twice. Therefore, there is a problem that the operation is troublesome.

JP 2001-327599 A (Claims (Claims 1 to 8), FIGS. 4 to 5) JP 2003-116996 A (Claims (Claims 1 to 6), FIGS. 3 and 6) US Pat. No. 5,931,815 (FIGS. 3-5) US Pat. No. 6,200,244 (FIGS. 1-5) JP-A-3-158171 (Claims (Claims 1 to 3), FIGS. 1 to 3)

  An object of the present invention is to provide a medical needle with a needle cover that can easily, safely and reliably be accommodated in a needle cover without a troublesome operation. .

A According to the present invention, the following medical needle with a needle cover is provided.
[1]
It has a front part (2), a substantially middle abdomen (3), and a rear part (4) sequentially in the longitudinal direction of the cylindrical body, and an opening (5) is formed at the bottom of the substantially middle abdomen (3). (4) a cylindrical needle cover (1) in which a slit (7) is formed;
A pair of wings (24) are attached to both sides of the needle base (23), a needle (22) is implanted in front of the needle base (23), and a tube (T ) With a winged needle (21)
In the medical needle with a needle cover, the winged needle (21) is slidably housed and protected in the needle cover (1).
(A) The locking portion (27), (28) is mounted on the tube (T), or (B) the locking portion (30) is mounted behind the needle base (23), and the needle cover A medical needle with a needle cover, wherein the winged needle housed inside is fixed.

[2]
From the first position where the needle (22) is exposed forward of the needle cover (1) to the second position where the needle (22) is housed and hidden in the needle cover (1), 1) When rocking and moving in the interior, the locking portions (27), (28), (30) are arranged so that the rear portion (4) formed with the slit portion (7) is moved to the slit (7 ) And the outer portion of the locking portion (27), (28) after passing through the rear portion (4) and moving the needle (22) to the second position. The front surface of (30) is locked to the back surface of the rear portion (4), and the winged needle is fixed in the needle cover at the second position and moves in the first position direction. The medical needle with a needle cover according to [1], characterized in that the needle is blocked.

[3]
When the needle (22) is in the first position exposed forward of the needle cover (1), the needle (22) is attached to the front portion ( 2), the front surface of the wing portion (24) is brought into contact with the rear surface of the front portion (2), and the locking portions (27), (28), (30) are substantially Located in the abdomen (3) or the rear part (4),
When the winged needle (21) is in the second position where it is housed and concealed in the needle cover (1), the needle (22) is in the front part (2) or the substantially middle part (3). The locking portions (27), (28), (30) are exposed from the rear portion (4), and the front surface thereof is locked to the rear surface of the rear portion (4). The medical needle with a needle cover according to [1] or [2], wherein the attached needle is fixed in the needle cover at the second position.

[4]
The outer diameter (D1) of the locking portions (27), (28), (30), the outer diameter (D2) of the tube (T), and the diameter (D3) of the opening (4a) of the rear portion (4). Each of the inner diameters (D4) of the rear part (4) satisfies the following relational expression. With the needle cover according to any one of [1] to [3] Medical needle.

The outer diameter (D1) of the locking portions (27), (28), (30)> the outer diameter (D2) of the tube (T) (i)
The outer diameter (D1) of the locking portions (27), (28), (30)> the diameter (D3) of the opening (4a) in the rear portion (4) (ii)
Outer diameter (D) of locking portions (27), (28), (30) = <inner diameter D4 of rear portion 4 (iii)

[5]
The needle according to any one of [1] to [4], wherein a pair of stoppers (8) for locking the wings (24) are provided on both sides of the middle abdomen (3). Medical needle with cover.

B According to the present invention, the following medical needle with a needle cover is provided.
[6]
A cylindrical shape having a front part (2), a substantially middle abdomen (3), and a rear part (4) in the longitudinal direction of the tubular body, and an opening (5) is formed at the bottom of the substantially middle abdomen (3). Needle cover (1 '),
A pair of wings (24) are attached to both sides of the needle base (23), a needle (22) is implanted in front of the needle base (23), and a tube (T ) With a winged needle (21)
In the medical needle with a needle cover, the winged needle (21) is slidably housed and protected in the needle cover (1 ′).
Attach locking portions (40), (50), (60) having a plurality of hooks (41), (51), (61) behind the tube (T) or the needle base (23), A medical needle with a needle cover, wherein the winged needle housed in the needle cover is fixed.

[7]
From the first position where the needle (22) is exposed forward of the needle cover (1 ′) to the second position where the needle (22) is housed and hidden in the needle cover (1). When moving in the cover (1)
The hooks (41), (51), (61) of the locking portions (40), (50), (60) pass through the rear part (4) while bending inward, and the needle (22) Is moved to the second position, the front surfaces of the hooks (41), (51), (61) are locked to the back surface of the rear portion (4), and thus the winged needle is The medical needle with a needle cover according to [6], wherein the needle is fixed in the needle cover at the position and is prevented from moving toward the first position.

[8]
When the needle (22) is in the first position exposed forward of the needle cover (1 ′), the needle (22) is positioned at the front portion of the needle cover. In a state exposed from (2), the front surface of the wing portion (24) is brought into contact with the back surface of the front portion (2), and the locking portions (40), (50), (60) Located in the middle abdomen (3) or the rear part (4),

When the winged needle (21) is in the second position where it is housed and concealed in the needle cover (1), the needle (22) is in the front part (2) or the substantially middle part (3). The hooks (41), (51), (61) of the locking portions (40), (50), (60) are exposed from the rear portion (4), and the front surface thereof is the rear The needle cover according to [6] or [7], wherein the needle cover is locked to a back surface of the portion (4), and the winged needle is fixed in the needle cover at the second position. With medical needle.

[9]
The hooks (41), (51), (61) of the locking parts (40), (50), (60), the outer diameter (D11) of the tube (T), the outer diameter (D2) of the tube (T), the rear part ( 4) The diameter (D3) of the opening (4a) and the inner diameter (D4) of the rear part (4) satisfy the following relational expressions [6] to [6] [8] A medical needle with a needle cover according to any one of [8].

Hook (41), (51), (61) outer diameter (D11)> Tube (T) outer diameter (D2) (i)
The outer diameter (D11) of the hooks (41), (51), (61)> the diameter (D3) of the opening (4a) in the rear part (4) (ii)
Hooks (41), (51), (61) outer diameter (D11)> rear part (4) inner diameter (D4) (iii)

  The medical needle with a needle cover of the present invention has the following advantageous effects. That is, when the needle 22 moves from the first position where the needle 22 is exposed forward from the needle cover 1 to the second position where the needle 22 is stored in the needle cover 1, the locking portions 27, 28, 30 are After the rear portion 4 is spread outward along the slit 7 and passes through the rear portion 4 and the needle 22 moves to the second position, the front surfaces of the locking portions 27, 28, 30 are moved to the rear portion. 4 is prevented from moving in the first position direction, so that the locking portions 27, 28, 30 can be simply pulled by pulling the tube T backward to retract the winged needle 21. However, since the rear part of the needle cover 1 can be easily climbed and locked, the operability is very good.

  The medical needle with a needle cover of the present invention also has the following advantageous effects. That is, when the needle 22 moves from the first position where the needle 22 is exposed forward from the needle cover 1 to the second position where the needle 22 is accommodated in the needle cover 1, The hooks 41, 51, 61 pass through the rear portion 4 while bending inward, and after the needle 22 has moved to the second position, the front surfaces of the hooks 41, 51, 61 are engaged with the rear surface of the rear portion 4. By stopping, the movement toward the first position is prevented, so that the locking portions 40, 50, 60 are simply moved backward by pulling the tube T backward to retract the winged needle 21. Since it can be easily passed and locked in the rear part, the operability is very good.

Hereinafter, preferred embodiments of the medical needle with a needle cover of the present invention will be described with reference to the drawings.
(Medical needle with needle cover)
As shown in FIGS. 3 to 13, the medical needle with a needle cover of the present invention basically has a needle cover 1 in which an opening 5 is formed in a substantially mid-abdominal part 3 and a slit part 7 is formed in a rear part 4 thereof. The wing portion 24 is attached to the needle base 23, the needle 22 is implanted in front of the needle base 23, and the winged needle 21 is attached to the rear side of the needle base 23 with the tube T. The winged needle 21 is accommodated (accommodated) in the needle cover 1 so as to be slidable.

  As shown in FIGS. 1A to 1B, the needle cover 1, when the front part 2, the substantially middle part 3, and the rear part 4 are sequentially partitioned in the longitudinal direction of the cylindrical body, the substantially middle part 3. That is, a cylindrical needle cover in which a substantially half (substantially semicircular or the like) opening is formed to form an opening 5 and a slit portion 7 is formed in a rear portion 4 thereof.

  The needle cover 1 is formed of a semi-rigid material, preferably a semi-rigid thermoplastic resin such as polyethylene, polypropylene, polybutene, polystyrene, methacrylic resin, polycarbonate, polyvinyl chloride, tetrafluoroethylene resin, polyamide, polyethylene terephthalate. It is preferable.

  A semi-rigid material is preferable as the needle cover forming material, because it has a rigidity functioning as a guard that sufficiently protects the housed winged needle from impact and others, and the needle base of the housed winged needle is opened at the rear part thereof. This is because it is desirable to provide elasticity that the opening 5 expands by being deformed to some extent when it is pulled out through 5.

  The slit 7 formed in the rear part 4 may be one or plural (two or more), and the shape thereof is not particularly limited. As will be described later, when the used needle 22 is pulled into and accommodated in the needle cover 22, the slit is formed so that the rear portion of the needle base 23 and the rear portion 4 of the needle cover together with the locking portion accordingly. The slit portion protrudes outward from the opening 4a of the needle, and the slit portion is pushed outward with some degree of flexibility during the passage, so that the opening 4a is expanded to expand the outside of the rear portion of the needle base. The shape, number, and the like are not particularly limited as long as they have a function capable of promoting the protrusion.

  Further, as illustrated in FIGS. 1 (A) and 2 (A), the rear portion 4 may have an external shape tapered toward the rear end portion. As illustrated in (B) and (C), the external shape may be formed straight, the inner wall surface may be thickened toward the rear end, and the taper may be tapered.

  In the figure, 4b is an end surface (back surface) of the needle cover rear portion 4. As will be described later, the end surface 4b is fixed in pressure contact with the locking portion, and the needle base is prevented from returning from the opening 4 into the needle cover.

  If necessary, a pair of wing-shaped stoppers 8 may be formed (attached) on both sides of the middle abdomen 3 as illustrated in FIGS. 2 (A) and 2 (B). The stopper 8 functions and plays a role of fixing the needle 12 across the wing 24 as described in Patent Document 1 relating to the application of the present inventors already described. The stopper 8 is formed in a wing shape, and is formed so as to be inclined toward the rear portion 4 direction (slightly upward). In addition, the variation about the shape etc. which can be employ | adopted about the stopper 8 can also employ | adopt the various aspects currently shown by the said patent document 1 suitably for the objective of this invention.

  Moreover, it is also preferable that the front part 2 of the needle cover is provided with a protrusion 2a. The protrusion 2a is a portion that the operator holds with a finger when using the winged needle with the needle cover of the invention.

  For example, as shown in the plan view of FIG. 3D, the winged needle 21 of the present invention has a pair of wings 24 mounted on both sides of the needle base 23 and the needle 22 is implanted in front of the needle base 23. In addition, a tube T is mounted (connected) behind the needle base 23. For example, as shown in FIGS. 3A to 3C, the winged needle 21 is housed in the needle cover 1 so as to be swingable and protected. Various operations or usage methods of the winged needle housed in the needle cover will be described later with reference to FIGS.

(Locking portions 27, 28, 30)
In the present invention, as shown in FIG. 3 to FIG. 12, for example, the locking portions 27 and 28 are attached to the tube T, or as shown in FIG. Wear or form. In this way, the winged needle accommodated in the needle cover can be fixed.

  As shown in FIGS. 3 to 8, the shape of the engaging portion 27 attached to the tube T may be a ring shape (meaning a relatively short substantially cylindrical shape), or FIGS. 9 to 9. As illustrated in FIG. 12, it may have a pipe shape (meaning a relatively long substantially cylindrical shape or a tube shape). These ring-shaped or pipe-shaped locking portions may be formed in a straight (uniform diameter) size cylinder as shown in FIGS. 9 to 12 or the like, or tapered as shown in FIGS. 3 to 8 or the like. The taper may be formed.

  Similarly, the locking portion 30 formed or attached to the rear portion of the needle base 23 may be ring-shaped as illustrated in FIG. 13, or may be pipe-shaped or wedge-shaped (also referred to as a hook) as described above. good.

  The needle base 1 and the locking portions 27, 28, and 30 are made of the same polyethylene, polypropylene, polybutene, polystyrene, methacrylic resin, polycarbonate, polyvinyl chloride, tetrafluoroethylene resin, polyamide, and polyethylene terephthalate as the materials forming the needle cover. A semi-rigid thermoplastic resin such as, for example, is preferably formed by injection molding. The formed locking portions 27, 28, and 30 are attached to the outer surface (outer periphery) of the tube T or the needle base in a tube shape or a ring shape by fixing means such as adhesion.

  In the case of the locking portion 30, when this is formed on the needle base 23, the locking portion 30 is integrated with the latter half of the needle base when the needle base is formed of semi-rigid plastic by injection molding or the like. It can be formed by molding. Of course, as described above, the locking portion 30 separately formed of a semi-rigid plastic material may be attached to the needle base by means such as adhesion.

  Further, the locking portions 27, 28, and 30 may be formed with tapered protrusions (also referred to as hooks) on the outer periphery.

(Locking action by the locking part)
In the medical needle with a needle cover according to the present invention, from the first position where the needle 22 is exposed forward of the needle cover 1 (for example, shown in FIG. 3A), the needle 22 is connected to the needle cover. When the inside of the needle cover 1 is moved to the second position (for example, shown in FIG. 3C) that is stored and hidden in the needle 1, the locking portions 27, 28, 30 are After passing the rear part 4 and spreading the rear part 4 forming the slit part 7 along the slit 7 outward, the needle 22 moves to the second position, The front surfaces of the locking portions 27, 28, 30 are locked to the back surface (more precisely, the end surface 4 b) of the rear portion 4, and thus the winged needle is in the second position at the needle cover. And is prevented from moving again toward the first position.

  In the medical needle with a needle cover according to the present invention, the winged needle 21 is in the first position where the needle 22 is exposed forward of the needle cover 1 (for example, FIG. 3A). In the state in which the needle 22 is exposed from the front portion 2 of the needle cover, the front surface of the wing portion 24 is brought into contact with the back surface of the front portion 2, and the locking portions 27, 28, 30 are When the needle 22 is located in the middle part 3 or the rear part 4 and is in the second position (for example, FIG. 3C) where the winged needle 21 is accommodated and hidden in the needle cover 1, the needle 22 is Arranged in the front part 2 or the substantially middle part (3), the locking parts 27, 28, 30 are exposed from the rear part 4, and the front surface is locked to the back surface of the rear part 4. Thus, the winged needle is fixed in the needle cover at the second position.

  In the medical needle with a needle cover of the present invention, the outer diameter D1 of the locking portions 27, 28, 30, the outer diameter D2 of the tube T, the diameter D3 of the opening 4a of the rear portion 4, and the rear portion 4 Each of the inner diameters D4 preferably satisfies the following relational expressions (i) to (iii) as shown in FIGS. 5, 8, and 13, for example. That is,

Outer diameter D1 of locking portions 27, 28, 30> Outer diameter D2 of tube T (i)
The outer diameter D1 of the locking portions 27, 28, 30> the diameter D3 of the opening 4a in the rear portion 4 (ii)
The outer diameter D of the locking portions 27, 28, 30 = <the inner diameter D4 of the rear portion 4 (iii)

Here, the outer diameter D1 of the locking portions 27, 28, and 30 is the largest diameter portion, for example, when there is a tapered portion as shown in FIG. Further, the inner diameter D4 of the rear portion 4 is also the largest diameter portion when there is a tapered portion as shown in FIG.
Next, an example of a method for using the medical needle with a needle cover of the present invention will be described with reference to the drawings.

(How to use a medical needle with a needle cover i) (FIGS. 3 to 6)
3 to 6, FIGS. 3A, 4 </ b> A, 5 </ b> A, and 6 </ b> A show the first position (p <b> 1) where the needle 22 is exposed forward from the needle cover 1. 3 (C), FIG. 4 (C), FIG. 5 (C) and FIG. 6 (I) show the second position (p2) where the needle 22 is housed in the needle cover 1 and protected. Show. 3B, FIG. 4B, FIG. 5B, and FIG. 6B to FIG. 6H, the needle 22 is moved from the first position (p1) to the second position (p2). (Pt) on the way to ().

(1) In the state where the injection of the medical solution or the like has been completed to the patient, the needle 22 is in the first position exposed forward from the needle cover 1. This is the state shown in FIG. 3 (A), FIG. 4 (A), FIG. 5 (A) and FIG. 6 (A).

(2) In order to move the needle 22 from the first position to the second position, the needle cover 1 is fixed with one hand, the tube T is pulled backward with the other hand, and the tube portion is attached to the needle cover 23. Pull out from the rear opening 4a in the rear part. 3 (B), 4 (B), and 5 (B) show a state in which the ring-shaped locking portion 27 passes through the rear opening 4a.

FIG. 6B to FIG. 6H illustrate this process in more detail. The ring-shaped locking portion 27 sequentially moves toward the rear portion 4, and the locking portion 27 When passing through the opening 4a, it passes through the rear part 4 while spreading the rear part 4 outward along the slit 7. By forming the slit 7 in the rear part 4 in this way, the rear part 4 is expanded outwardly with flexibility, and the opening 4a is expanded. Movement to the outside is encouraged.

(3) In a state where the portion of the latching portion 27 has come out of the rear opening 4a, that is, in a state where the needle 22 has moved to the second position where it is housed in the needle cover 1, the front surface 27a of the latching portion 27 Is locked by being pressed against the back surface of the rear portion 4 (more precisely, the end surface 4b of the rear opening). That is, since the outer diameter D1 of the locking portion 27 is formed larger than the diameter D3 of the rear portion 4 opening 4a, the front surface of the locking portion 27 comes into contact with and press-contacts the end surface 4b of the rear portion 4. It is prevented from moving backwards in the four directions. After the needle 22 is housed in the needle cover 1, it moves again from the needle cover 1 in the first position direction, and the sharp needle tip is not exposed.

(Usage method of medical needle with needle cover ii) (FIGS. 7 to 8)
7 to 8 show an example of usage when the wing-like stopper 8 is formed on the needle cover 1. Basically, the same operation as described above is performed.
7 to 8, FIGS. 7A and 8A show the first position (p1) where the needle 22 is exposed forward of the needle cover 1 as shown in FIGS. 7C and 8C. ) Indicates a second position (p2) in which the needle 22 is housed in the needle cover 1 and protected. 7B and 8B show the position (pt) in the middle of the movement of the needle 22 from the first position (p1) to the second position (p2), respectively.

(1) In the state where the injection of the medical solution or the like has been completed to the patient, the needle 22 is in the first position exposed forward from the needle cover 1. This is the state shown in FIGS. 7A and 8A.

(2) In order to move the needle 22 from the first position to the second position in the same manner as described above, the needle cover 1 is fixed with one hand, and the tube T is pulled backward with the other hand. The portion is pulled out from the rear opening 4 a in the rear portion of the needle cover 23. FIGS. 7B and 8B show a state in which the ring-shaped locking portion 27 passes through the rear opening 4a, and the locking portion 27 pushes the rear portion 4 outward along the slit 7. , Passing through the rear part 4.
In this case, as shown in FIGS. 7B and 8B, the wing portion 24 and the wing-shaped stopper 8 move relatively in opposite directions while facing each other.

(3) In a state in which the portion of the locking portion 27 has come out of the rear opening 4a (a state in which the needle 22 has moved to the second position stored in the needle cover 1), as described above, the locking portion The front surface 27a of the portion 27 is locked by being pressed against the end surface 4b of the rear opening.

  In this second position, the wing-shaped stopper 8 is formed so as to incline toward the rear portion 4 (slightly upward), so that when the tube T is pulled rearward, the wing portion of the winged needle 21 is provided. 24 gets over the inclined portion of the stopper 8 and engages and locks. In this way, since the wing portion 24 and the wing-shaped stopper 8 are also locked, the needle 22 is more stably fixed in the needle cover.

  Since the outer diameter D1 of the locking part 27 is formed larger than the diameter D3 of the opening 4a of the rear part 4, and the wing 24 is locked to the stopper 8, as described above, the locking part 27 is the rear part 4 It is prevented from moving in the opposite direction. Further, as described above, the wing portion 24 is fixed between the rear portion 4 and the stopper 8 so as not to move back and forth. Thus, after the needle 22 is housed in the needle cover 1, it never moves from the needle cover 1 toward the first position, and the sharp needle tip is not exposed.

(Usage method of medical needle with needle cover iii) (FIGS. 9 to 10)
9 to 10 are examples in which the ring-shaped locking portion 27 of FIGS. 3 to 6 is replaced with a longer pipe-shaped locking portion 28.

  Basically, the same operation as that described with reference to FIGS. However, the locking portion 28 is in relation to the locking portion 27 from the first position (p1) where the needle 22 is exposed from the needle cover 1 to the second position (p2) where the needle 22 is stored in the needle cover 1. When moving to, in order to make the movement when passing the rear part 4 more smoothly, there is a difference in that the shapes are different.

  That is, in the case of the ring-shaped latching portion 27 having a relatively short substantially cylindrical shape illustrated in FIGS. 3 to 6 described above, the latching portion 27 is illustrated in FIGS. As shown in FIG. 6 (A), it is in the position of the abdomen 3 (opening 5). Therefore, when moving to the second position, when moving to the rear part 4 out of the opening 5, the rear part 4 (the opposite end surface) is easily caught. Therefore, as shown in FIG. 3A and the like, the tube side of the ring-shaped locking portion 27 (that is, the side that first contacts the opposite end face of the rear portion 4) is formed in a tapered shape (wedge shape). , So that it can be moved smoothly with less catch.

On the other hand, in the case of the tube-shaped pipe-shaped locking portion 28 having a relatively long and substantially cylindrical shape illustrated in FIGS. 9 to 10, as shown in FIG. 10A, for example, at the first position. The rear part (end surface on the tube side) of the locking part is already located in the rear part 4 of the needle cover 1. Therefore, when moving to the second position, it is sufficient to advance the rear part 4 as it is toward the rear part opening 4a, and it moves smoothly without being caught by the opening rear part 4 (the opposite end face thereof). be able to.
Since other usage methods are substantially the same as those in FIGS. 3 to 6 and the like, detailed description thereof is omitted.

(How to use a medical needle with a needle cover iv) (FIGS. 11 to 13)
FIGS. 11 to 12 show examples of usage when the wing-like stopper 8 is formed on the needle cover 1. This corresponds to a ring-shaped locking portion 27 in FIGS. 7 to 8 showing an example of usage when the wing-shaped stopper 8 already described is formed, instead of the pipe-shaped locking portion 28. Since the method of use is substantially the same as described above, a detailed description is omitted.

  FIG. 13 shows an example in the case of the locking portion 30 to be mounted or formed on the rear portion of the needle base 23. That is, the locking portion 30 is different only in that the ring-shaped locking portion 27 in FIGS. 3 to 6 is mounted not on the tube T but on the rear portion of the needle base 23. 3 to 6 are substantially the same, and detailed description thereof is also omitted here.

(Another embodiment of a medical needle with a needle cover)
Another embodiment of the medical needle with a needle cover of the present invention is shown in FIGS. 14 to 15. Basically, in the same manner as described above, the medical needle is mounted with a needle cover 1 ′ having an opening 5 in the substantially middle abdomen 3 and a wing portion 24 of a needle base 23. A winged needle 21 in which a needle 22 is implanted and a tube T is mounted behind the needle base 23, and the winged needle 21 is accommodated in the needle cover 1 in a swingable manner. However, in this embodiment, the locking portions 40, 50, 60 having a plurality of hooks 41, 51 are attached to the back of the tube T or the needle base 23, and thus, in the needle cover. The housed winged needle is fixed.

  The needle cover 1 ′ is basically the same as that shown in FIGS. 1 (A) to 1 (B), and sequentially has a front part 2, a substantially middle part 3, and a rear part 4 in the longitudinal direction of the cylindrical body. Is formed at the bottom of the substantially middle abdomen 3, that is, approximately half (in a substantially semicircular shape or the like) to form an opening 5. However, since a locking portion having a plurality of hooks 41 and 51 is employed, it is not always necessary to form a taper in the rear portion 4, and a slit portion 7 needs to be formed in the rear portion 4. Nor.

(Locking portions 40, 50, 60)
In another embodiment of the present invention, when the hooks 41 and 51 are formed, as illustrated in FIGS. 14 to 15, connecting portions 43 and 53 are provided behind the needle basic bodies 42 and 52, The hooks 41 and 51 can be formed at the rear ends of the connecting portions 43 and 53. Since the connecting portions 43 and 53 are fixed to the surface of the needle basic body, the hooks 41 and 51 are fixed on the needle basic bodies 42 and 52 via the connecting portions 43 and 53. Here, the “hook” means a portion having a locking action of a shape such as a collar portion, a burr portion, or a protruding portion.

  The connecting portions 43 and 53 and the hooks 41 and 51 may be at least one or two, and may be three or more and ten. As illustrated in FIGS. 14A to 14F, a short hook 41 may be used, or a relatively long hook 51 as shown in FIGS. 15A to 15F may be used. Further, the hooks 41 and 51 may be formed directly behind the needle basic bodies 42 and 52 by substantially eliminating the connecting portions 43 and 53.

Further, the locking portions 40 and 50 (hooks 41 and 51) may be formed directly or integrally behind the needle base 23 of the winged needle 21.
Furthermore, as in the locking portion 60 illustrated in FIG. 16, the rear portion (tube T side) of the connecting portion 63 is fixed by an annular fixing member 65, and the hook 61 is formed at the approximate center of the connecting portion 63. Also good.

  In the above-described locking portions 40, 50, 60, when the connecting portions 43, 53, 63 and the hooks 41, 51, hook 61 pass the rear portion 4 of the needle cover 1, they are moved to the tube inner diameter side together with the tube. Bend. And after passing, by returning to the original shape again, the front surfaces of the hooks 41, 51, 61 are engaged with the back surface (opening end surface 4b) of the needle cover rear portion 4 to become a stopper.

  Basically, as described above, in the locking portions 40, 50, 60, the hooks 41, 51, 61 provide a locking action. However, in the case of the shape of the locking portions 40, 50, Have the following concerns: That is, in the locking portions 40 and 50, the needle base 23 side of the winged needle 21 is fixed by 42 and 45, but the hooks 41 and 51 side are not fixed, so when sliding to the tube T side, There is a possibility that the connecting portions 43 and 53 are slightly unstable and the hooks 41 and 51 bend irregularly. Furthermore, in the case of the short hook 41 as shown in FIG. 14, there is a concern that it is difficult to smoothly slide in the rear portion 4 of the needle cover 1. These concerns regarding the locking portions 40 and 50 can be solved by the locking portion 60 including the annular fixing members 62 and 65.

  The locking portions 40, 50, 60 are the same as the locking portions 27, 28, 30, such as polyethylene, polypropylene, polybutene, polystyrene, methacrylic resin, polycarbonate, polyvinyl chloride, tetrafluoroethylene resin, polyamide, polyethylene terephthalate, etc. It is preferably a semi-rigid thermoplastic resin formed by injection molding. The formed locking portions 40, 50, 60 are similarly attached to the outer surface (outer periphery) of the needle base by an adhering means such as adhesion.

  The locking portions 40, 50, and 60 can be formed by integral molding of the locking portion 40 and the like in the latter half of the needle base when the needle base is formed of semi-rigid plastic by injection molding or the like. .

(Locking action by the locking parts 30, 40, 60)
In another embodiment of the medical needle with a needle cover of the present invention, the needle 22 is exposed from a first position exposed forward of the needle cover 1 (for example, shown in FIG. 14A). When the needle 22 is moved and moved in the needle cover 1 to a second position (for example, shown in FIG. 14C) which is stored and hidden in the needle cover 1, the locking portion 40 is moved. , 50, 60 hooks 41, 51, 61 pass through the rear part 4 while bending inward, and after the needle 22 has moved to the second position, the front surfaces of the hooks 41, 51, 61 are The back portion 4 is engaged with the back surface (more precisely, caught by the end surface 4b of the rear opening 4a), and thus the winged needle is fixed in the needle cover at the second position, Prevents moving again in the direction of one position.

  Moreover, in another embodiment of the medical needle with a needle cover of the present invention, the winged needle 21 has the first position where the needle 22 is exposed forward of the needle cover 1 (for example, FIG. 14 ( A)), the front surface of the wing 24 is brought into contact with the rear surface of the front portion 2 with the needle 22 exposed from the front portion 2 of the needle cover, and the locking portions 40, 50 , 60 are located in the substantially middle part 3 to the rear part 4 and are in the second position (for example, FIG. 14C) where the winged needle 21 is housed and hidden in the needle cover 1. The needle 22 is disposed in the front part 2 or the substantially middle part 3, and the hooks 41, 51, 61 of the locking parts 40, 50, 60 are exposed from the rear part 4, Is locked to the back surface of the rear portion 4 (more precisely, it is caught by the end surface 4b of the rear opening 4a). Is, in this way, the winged needle is fixed to the needle within the cover in said second position.

  In another embodiment of the medical needle with a needle cover of the present invention, the outer diameter D11 of the hooks 41, 51, 61 of the locking portions 40, 50, 60, the outer diameter D2 of the tube T, the rear portion 4 Each size of the diameter D3 of the opening 4a and the inner diameter D4 of the rear portion 4 satisfies the following relational expressions (i) to (iii) as shown in FIGS. Is preferred. That is,

The outer diameter D11 of the hooks 41, 51, 61> the outer diameter D2 of the tube T (i)
The outer diameter D11 of the hooks 41, 51, 61> the diameter D3 (ii) of the opening 4a of the rear part 4
The outer diameter D11 of the hooks 41, 51, 61> the inner diameter D4 of the rear part 4 (iii)

  Here, the rear portion 4 of the needle cover 1 may be tapered or may be a straight cylinder. Moreover, the shape in which the slit 7 was formed may be sufficient, and the shape without a slit may be sufficient. When adopting the locking portions 40, 50, 60, the rear portion 4 of the needle cover 1 basically has a shape of a small cylinder without a slit, and on the back surface thereof (the end surface 4b of the rear opening 4a), The front surfaces of the hooks 41, 51, 61 of the locking portions 40, 50, 60 are engaged.

  Next, another embodiment of the medical needle with a needle cover of the present invention will be described with reference to the drawings with respect to an example of its usage.

(How to use a medical needle with a needle cover i) (FIG. 14)
14A shows the first position (p1) where the needle 22 is exposed forward of the needle cover 1, and FIG. 14C shows the first position where the needle 22 is housed in the needle cover 1 and protected. The second position (p2) is shown, and FIG. 14B shows the position (pt) in the middle of the movement of the needle 22 from the first position (p1) to the second position (p2). .

(1) In the state where the injection of the drug solution or the like has been completed to the patient, the needle 22 is in the first position exposed forward from the needle cover 1. This is the state shown in FIG.

(2) In order to move the needle 22 from the first position to the second position, the needle cover 1 is fixed with one hand, the tube T is pulled backward with the other hand, and the tube portion is attached to the needle cover 23. Pull out from the rear opening 4a in the rear part. As illustrated in FIG. 14B, the hook 41 of the locking part 40 moves in the direction of the rear part 4 and passes through the rear part 4 while bending inward. In this case, unlike the case of FIG. 3 (B) to FIG. 5 (B) and the like, the rear portion 4 does not need to be pushed outward.

(3) After the needle 22 has moved to the second position, the front surface of the hook 41 is locked to the back surface of the rear portion 4 (the end surface 4b of the rear opening 4a). As expressed by the above formula, the outer diameter D11 of the hook 41 of the locking portion is formed larger than the diameter D3 of the rear portion 4 opening 4a. The reverse movement in the direction of the rear part 4 is prevented.
After the needle 22 is housed in the needle cover 1, it moves again from the needle cover 1 in the first position direction, and the sharp needle tip is not exposed.

(How to use a medical needle with a needle cover ii) (FIG. 15)
FIG. 15 is an example in which the locking portion 40 of FIG. 14 is replaced with a locking portion 50, and the usage method is substantially the same, so detailed description thereof is omitted.

  In this case, since the hook 51 of the locking part 50 is formed longer than the hook 41 of the locking part 40, it is easier to pass through the rear part 4 than the locking part 40 and to lock more easily.

  Moreover, in the case of the latching | locking part 50, since the back part (tube side end surface) is already in the back part 4 of the needle cover 1 in the 1st position, when moving to a 2nd position, a back part 4 can move smoothly without being caught.

(Usage method of medical needle with needle cover iii) (FIG. 16)
FIG. 16 is an example in which the locking portions 40 and 50 in FIGS. 14 and 15 are replaced with a locking portion 60.
16A shows a first position (p1) where the needle 22 is exposed forward of the needle cover 1, and FIG. 16C shows a second position where the needle 22 is stored in the needle cover 1 (p2). FIG. 16B shows a position (pt) in the middle of the movement of the needle 22 from the first position to the second position.
(1) In the state where the injection of the drug solution or the like is finished in the patient, the needle 22 is in the first position exposed forward from the needle cover 1 as shown in FIG.

(2) When the needle cover 1 is fixed with one hand and the tube T is pulled backward with the other hand, the hook 61 of the locking part 60 is in the rear part 4 direction as illustrated in FIG. And passes through the rear part 4 while bending inward.

(3) And after the needle | hook 22 moved to the 2nd position (p1), the front surface of the hook 61 is latched by the back surface (end surface 4b of the back opening 4a) of the back part 4. FIG.

  As expressed by the above formula, the outer diameter D11 of the hook 61 of the locking portion is formed larger than the diameter D3 of the rear portion 4 opening 4a, so that the locking portion 60 is reversed in the rear portion 4 direction. Is prevented from moving to. After the needle 22 is housed in the needle cover 1, it moves again from the needle cover 1 in the first position direction, and the sharp needle tip is not exposed.

  The medical needle with a needle cover of the present invention can be stored in the needle cover easily, safely and securely without troublesome operation, and as a medical needle that achieves both operability and safety, It is suitably used for infusion and blood transfusion.

It is the schematic which shows an example of the needle cover of this invention, Comprising: (A) is a front perspective view of the needle cover 1 of this invention, (B) is a front perspective view which shows the state which the slit opened. It is the schematic which shows an example of the needle cover of this invention, Comprising: (A) is a front perspective view of the needle cover of this invention, (B) is a front perspective view which shows the state which the slit opened. It is a figure shown about an example of the usage method of the medical needle with a needle cover, (A)-(C) are sectional drawings which show progress in use time-sequentially, (D) is a winged needle. It is a top view. It is a figure shown about an example of the usage method of the medical needle with a needle cover, (A)-(C) is a perspective view which shows progress in use time-sequentially. It is a figure shown about an example of the usage method of a medical needle with a needle cover, (A1)-(C1) are sectional drawings which show progress in use time-sequentially, and (A2)-(C2) are used. It is a top view which shows progress of time in time series. It is a figure shown about an example of the usage method of the medical needle with a needle cover, (A)-(I) is sectional drawing which shows progress in use time-sequentially, (J) is a winged needle. It is a top view. It is a figure shown about an example of the usage method of the medical needle with a needle cover, (A)-(C) is a perspective view which shows progress in use time-sequentially. It is a figure shown about an example of the usage method of a medical needle with a needle cover, (A1)-(C1) are sectional drawings which show progress in use time-sequentially, and (A2)-(C2) are used. It is a top view which shows progress of time in time series. It is a figure shown about an example of the usage method of the medical needle with a needle cover, (A)-(C) is a perspective view which shows progress in use time-sequentially. It is a figure shown about an example of the usage method of the medical needle with a needle cover, (A1)-(C1) are sectional drawings which show progress in use time-sequentially, and (A2)-(C2) are used. It is a top view which shows progress of time in time series. It is a figure shown about an example of the usage method of the medical needle with a needle cover, (A)-(C) is a perspective view which shows progress in use time-sequentially. It is a figure shown about an example of the usage method of the medical needle with a needle cover, (A1)-(C1) are sectional drawings which show progress in use time-sequentially, and (A2)-(C2) are used. It is a top view which shows progress of time in time series. It is a figure shown about an example of the usage method of the medical needle with a needle cover, (A)-(I) is sectional drawing which shows progress in use time-sequentially, (J) is a winged needle. It is a top view. It is a figure shown about other examples of the usage method of the medical needle with a needle cover, (A)-(C) is a sectional view showing progress in use time-sequentially, (D) is with a wing. It is a top view of a needle, (E) is a perspective view of a winged needle, and (F) is a perspective view seen from the opposite side. It is a figure shown about other examples of the usage method of the medical needle with a needle cover, (A)-(C) is a sectional view showing progress in use time-sequentially, (D) is with a wing. It is a top view of a needle, (E) is a perspective view of a winged needle, and (F) is a perspective view seen from the opposite side. It is a figure shown about other examples of the usage method of the medical needle with a needle cover, (A)-(C) is a sectional view showing progress in use time-sequentially, (D) is with a wing. It is a top view of a needle, (E) is a perspective view of a winged needle, and (F) is a perspective view seen from the opposite side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Needle cover 2 Front part 2a Protrusion part 3 Middle abdominal part 4 Back part 4a Rear part 4 opening 4b End face of rear part 4 opening 5 Opening part 7 Slit 8 (wing shape) stopper 8a Locking part 8b Thick part 8c Locking Part 21 Wing needle 22 Needle 23 Needle base 24 Wing part 27 Locking part (ring shape)
27a Front side 28 Locking part (pipe shape)
30 Locking part mounted or formed on the needle base 40 Locking part 41 Hook 42 Main body 43 Connecting part 50 Locking part 51 Hook 52 Main body 60 Locking part 61 Hook 62 Main body 63 Connecting part 65 Annular fixing member D1 Locking Outer diameter of the part D2 Outer diameter of the tube D3 Diameter of the opening 4 in the rear part 4 D4 Inner diameter of the rear part 4 T tube
p1 1st position p2 2nd position pt Position in the middle of moving from 1st position (p1) to 2nd position (p2)

Claims (9)

It has a front part (2), a substantially middle abdomen (3), and a rear part (4) sequentially in the longitudinal direction of the cylindrical body, and an opening (5) is formed at the bottom of the substantially middle abdomen (3). (4) a cylindrical needle cover (1) having a slit (7) formed thereon;
A pair of wings (24) are attached to both sides of the needle base (23), a needle (22) is implanted in front of the needle base (23), and a tube (T ) With a winged needle (21)
In the medical needle with a needle cover, the winged needle (21) is slidably housed and protected in the needle cover (1).
(A) The locking portion (27), (28) is mounted on the tube (T), or (B) the locking portion (30) is mounted behind the needle base (23), and the needle cover A medical needle with a needle cover, wherein the winged needle housed inside is fixed.   From the first position where the needle (22) is exposed forward of the needle cover (1) to the second position where the needle (22) is housed and hidden in the needle cover (1), 1) When rocking and moving in the interior, the locking portions (27), (28), (30) are arranged so that the rear portion (4) formed with the slit portion (7) is moved to the slit (7 ) And the outer portion of the locking portion (27), (28) after passing through the rear portion (4) and moving the needle (22) to the second position. The front surface of (30) is locked to the back surface of the rear portion (4), and the winged needle is fixed in the needle cover at the second position and moves in the first position direction. The medical needle with a needle cover according to claim 1, wherein the medical needle is blocked. When the needle (22) is in the first position exposed forward of the needle cover (1), the needle (22) is attached to the front portion ( 2), the front surface of the wing portion (24) is brought into contact with the rear surface of the front portion (2), and the locking portions (27), (28), (30) are substantially Located in the abdomen (3) or the rear part (4),
When the winged needle (21) is in the second position where it is housed and concealed in the needle cover (1), the needle (22) is in the front part (2) or the substantially middle part (3). The locking portions (27), (28), (30) are exposed from the rear portion (4), and the front surface thereof is locked to the rear surface of the rear portion (4). The medical needle with a needle cover according to claim 1 or 2, wherein the needle is fixed in the needle cover at the second position. The outer diameter (D1) of the locking portions (27), (28), (30), the outer diameter (D2) of the tube (T), and the diameter (D3) of the opening (4a) of the rear portion (4). And each of the inner diameters (D4) of the rear part (4) satisfies the following relational expression, for medical use with a needle cover according to any one of claims 1 to 3 needle.

The outer diameter (D1) of the locking portions (27), (28), (30)> the outer diameter (D2) of the tube (T) (i)
The outer diameter (D1) of the locking portions (27), (28), (30)> the diameter (D3) of the opening (4a) in the rear portion (4) (ii)
Outer diameter (D) of locking portions (27), (28), (30) = <inner diameter D4 of rear portion 4 (iii)
  The needle cover according to any one of claims 1 to 4, wherein a pair of stoppers (8) for locking the wings (24) are provided on both sides of the middle abdomen (3). Medical needle. A cylindrical shape having a front part (2), a substantially middle abdomen (3), and a rear part (4) in the longitudinal direction of the tubular body, and an opening (5) is formed at the bottom of the substantially middle abdomen (3). Needle cover (1 '),
A pair of wings (24) are attached to both sides of the needle base (23), a needle (22) is implanted in front of the needle base (23), and a tube (T ) With a winged needle (21)
In the medical needle with a needle cover, the winged needle (21) is slidably housed and protected in the needle cover (1 ′).
Attach locking portions (40), (50), (60) having a plurality of hooks (41), (51), (61) behind the tube (T) or the needle base (23), A medical needle with a needle cover, wherein the winged needle housed in the needle cover is fixed. From the first position where the needle (22) is exposed forward of the needle cover (1 ′) to the second position where the needle (22) is housed and hidden in the needle cover (1). When moving in the cover (1)
The hooks (41), (51), (61) of the locking portions (40), (50), (60) pass through the rear part (4) while bending inward, and the needle (22) Is moved to the second position, the front surfaces of the hooks (41), (51), (61) are locked to the back surface of the rear portion (4), and thus the winged needle is The medical needle with a needle cover according to claim 6, wherein the medical needle is fixed in the needle cover at the position to prevent movement in the first position direction. When the needle (22) is in the first position exposed forward of the needle cover (1 ′), the needle (22) is positioned at the front portion of the needle cover. In a state exposed from (2), the front surface of the wing portion (24) is brought into contact with the back surface of the front portion (2), and the locking portions (40), (50), (60) Located in the middle abdomen (3) or the rear part (4),
When the winged needle (21) is in the second position where it is housed and concealed in the needle cover (1), the needle (22) is in the front part (2) or the substantially middle part (3). The hooks (41), (51), (61) of the locking portions (40), (50), (60) are exposed from the rear portion (4), and the front surface thereof is the rear The needle cover according to claim 6 or 7, wherein the needle cover is locked to a back surface of the portion (4), and the winged needle is fixed in the needle cover at the second position. With medical needle. The hooks (41), (51), (61) of the locking parts (40), (50), (60), the outer diameter (D11) of the tube (T), the outer diameter (D2) of the tube (T), the rear part ( The diameters (D3) of the openings (4a) and the inner diameters (D4) of the rear part (4) satisfy the following relational expressions, respectively: A medical needle with a needle cover according to any one of the above.

Hook (41), (51), (61) outer diameter (D11)> Tube (T) outer diameter (D2) (i)
The outer diameter (D11) of the hooks (41), (51), (61)> the diameter (D3) of the opening (4a) in the rear part (4) (ii)
Outer diameter (D11) of hooks (41), (51), (61)> Inner diameter (D4) of rear part (4)
(Iii)

Images