JPH11188097A - Sheath for protecting needle of injector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheath that prevents a nurse, a doctor or a person who is in charge of waste disposal from being stuck by a needle of an used injector or being infected by mistake when they case or dispose the used injector and to prevent. SOLUTION: Around opening 11a of the sheath that cases a needle of injector, flange 12 that prevents the needle from sticking in human skins and covers an user's fingertips picking up the sheath 11 and connecting part 13 that prevents the needle cased in the opening 11a from deviation are made in order to case the used needle. In these process, nurses and doctors, or a person who is in charge of disposal of waste cannot be stuck by the needle by mistake in case that they case it or they convey it that has been cased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheath for protecting a used medical injection needle.

[0002]

[Related Background Art] Conventionally, medical workers such as doctors and nurses dispose of used syringes without reusing them after injecting and collecting blood from patients, and disposing of AIDS and hepatitis B, etc. Prevents hospital-acquired infections. In disposing of such a syringe, as shown in FIG. 7, the injection needle 30 including the needle and the locking tip is stored in the cylindrical sheath in which the injection needle 30 is stored, that is, the sheath 50, and thereafter, It is common practice to pull out the injection needle 30 from a syringe body 40 composed of an outer cylinder and a plunger, and discard the injection needle 30 together with the sheath 50.

As shown in FIG. 6, a conventional sheath 50 is a cylindrical body whose diameter is reduced toward the distal end, and a thick portion 50b for engaging with the injection needle 30 is provided near an opening 50a. It is formed, and the tip 50c is closed. The sheath 50 is for storing the injection needle before use, but generally the sheath 50 is also used for storing the injection needle 30 after use.

[0004]

When the used injection needle 30 is to be stored again in the conventional sheath 50, the injection needle 30 shown in FIG.
As shown in (2), the user holds the vicinity of the opening of the sheath 50 with the finger of one hand, and inserts the injection needle 30 into the sheath from the opening 50a while holding the syringe body 40 with the finger of the other hand. Was. During this insertion operation, as is apparent from FIG.
The finger of one hand is not protected at all from the needle tip of the injection needle 30, and there is a high risk that the needle tip will pierce the finger by carelessness of the user.

Next, when the injection needle 30 is inserted into the sheath 50, the outer periphery of the locking tip 30a of the injection needle 30 is fitted into the opening 50a of the sheath 50, and the injection needle 30 is stored in the sheath 50. Will be retained. In such a manner of storing and holding, after the injection needle 30 is discarded together with the sheath 50, the injection needle 30 may fall off the sheath 50 while the disposal company is transporting the same. If the material of the sheath 50 is soft, the needle tip may break through the sheath 50 and be exposed outside the sheath 50. Therefore, there is a danger that the injection needle may erroneously pierce the finger of the waste disposal company during the disposal of these wastes.

Spent injection needle 30 with infected blood
Inadvertently piercing a finger as described above will cause secondary infection. In order to prevent such a used needle from being pierced, a used injection needle processing device that sterilizes and melts the injection needle by arc discharge, separates a metal part and a resin part, and performs disposal processing is used. It is possible. However, such a processing apparatus requires a complicated structure to perform arc discharge, and consumes considerable power, and thus requires a corresponding power supply.

[0007] Therefore, such a processing apparatus usually needs to be installed in a treatment room in a hospital on a table, and cannot be carried by nurses and doctors. Therefore, when performing injection or blood collection to a patient at the time of a round, the doctor or nurse temporarily stores the used injection needle in the above-described sheath 50, pulls out the injection needle again from the sheath 50 in the treatment room, and performs processing. It is necessary to dispose by heat treatment with the equipment. Therefore,
There is a high risk of accidentally sticking the tip of a used injection needle into the skin.

[0008] An object of the present invention is to prevent a nurse or doctor from accidentally sticking the needle tip into the skin when storing a used injection needle, and to allow a waste disposal company to dispose of the used injection needle. It is an object of the present invention to provide a protective sheath for an injection needle which prevents similar piercing during processing.

[0009]

SUMMARY OF THE INVENTION A protective sheath for an injection needle according to the present invention is formed around a cylindrical body for accommodating an injection needle and one end opening of the cylindrical body, and is provided for a user holding the cylindrical body. It is characterized by comprising a needle piercing prevention flange that covers the fingertip. When a nurse or doctor stores the used needle in the sheath, the flange protects the fingertip and the needlepoint does not accidentally pierce the skin.

A protective sheath for an injection needle according to a second aspect of the present invention is characterized in that an engagement portion for preventing the injection needle housed in the opening of the cylindrical body from deviating is formed. Once the used injection needle is inserted into the sheath, the locking tip of the injection needle is engaged with the engagement portion of the sheath, and the injection needle does not fall out of the sheath due to the vibration during transportation. The protective sheath for an injection needle according to claim 3 of the present invention is characterized in that the cylindrical body comprises a distal cylindrical portion made of a hard resin and a proximal cylindrical portion made of a softer resin.

While the injection needle is housed in the sheath, the needle tip does not break through the sheath.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A protective sheath for an injection needle according to an embodiment of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, a protective sheath 10 for an injection needle of the present invention includes a cylindrical body 11 for storing a used injection needle 30 and a flange formed at an opening 11 a of the cylindrical body 11 for preventing needle piercing. 12 and an engaging portion 13 formed in the opening 11a for preventing the stored injection needle 30 from deviating.

The cylindrical body 11 is made of a material which can be easily molded, such as polypropylene or polyethylene resin.
The material is not necessarily limited to these, and any material may be used as long as it is difficult to penetrate the needle tip. Also, cylindrical body 1
1 has an overall length sufficient to accommodate the injection needle 30, and has an outer diameter slightly reduced toward the distal end. The distal end 11b of the cylinder 11 is closed.

A flange 12 is formed integrally with the cylinder 11 over the entire periphery of the opening 11a of the cylinder 11. The flange 12 has a trumpet shape whose diameter is rapidly increased in the radial direction. Further, when the vicinity of the opening of the cylindrical body 11 is held by two fingers, the flange 12 has such a degree that the portions of the fingers gripping the cylindrical body 11 are hidden by the flange 12 when viewed from the cylindrical body opening side. Have a diameter. The flange 12 has such a thickness that when the injection needle 30 is stored in the cylindrical body 11, the needle tip does not penetrate the flange 12 even if it accidentally pierces the flange 12.

The inner diameter of the cylindrical body 11 is equal to the opening 11 of the cylindrical body 11.
After gradually reducing the diameter from a to the distal direction, the diameter rapidly increases to a size slightly larger than the outer diameter of the locking tip 30a of the injection needle 30 shown in FIG. An aperture portion 13a and a step portion 13b are formed near the portion. Once the locking tip 30a of the injection needle 30 has passed through the squeezed portion 13a, the step 13b is
0 forms a step that does not easily fall off the cylindrical body 11. Although the inner diameter of the narrowed portion 13a is slightly smaller than the outer diameter of the locking tip 30a of the injection needle 30, when the locking tip 30a is fitted into the narrowed portion 13a, the diameter increases by elasticity and the locking tip 30a passes. It is formed to the extent that it can be performed. In addition, the engagement part 13 is comprised by the throttle part 13a and the step part 13b.

The inner diameter of the cylindrical body 11 on the distal end side from the step portion 13b is slightly reduced toward the distal end in accordance with the outer diameter of the cylindrical body 11. In addition, the cylinder 11 does not easily break even if it receives an external force while the injection needle 30 is being stored, and the injection needle 3
It has a thickness such that the zero needle tip is not exposed. Next, an operation based on such a configuration will be described.

After the nurse or doctor finishes the injection and blood sampling to the patient, as shown in FIG. 3, the used syringe 40 is held with one finger, and the cylinder 11 is held with the other hand. In the vicinity of the opening 11a. Then, the tip of the injection needle 30 is inserted through the opening 11a of the cylinder 11 into the cylinder. On this occasion,
Even if the insertion operation is not successful, the finger holding the cylindrical body 11 is protected by the flange 12, so that the needle tip does not accidentally pierce the finger.

Subsequently, the injection needle 30 is housed in the cylinder.
The locking tip 30a of the injection needle 30 is fitted into the narrowed portion 13a of the engaging portion 13 while expanding the inner wall of the narrowed portion, and finally passes through the narrowed portion 13a. Thereby, the injection needle 30
As shown in FIG. 2, it is completely housed inside the cylindrical body. Once
Since the outer peripheral edge of the locking tip 30a of the stored injection needle 30 is engaged with the step portion 13b of the engagement portion 13, the injection needle 30 cannot come out of the opening 11a of the cylindrical body 11 again. Absent. Therefore, after storing the injection needle 30 inside the cylinder,
If the protective sheath 10 for the injection needle is separated from the syringe body 40, the injection needle 30 can be easily and safely separated from the syringe body 40.
Can be separated quickly.

When the used injection needle 30 is stored in the protective sheath 10 for the injection needle in this way, and the disposal treatment is entrusted to a waste disposal company together with the sheath, the injection needle 30 falls off the sheath 10 due to vibration during transportation or the like. Without any
The disposal of the used injection needle 30 is performed safely with the sheath 10, that is, without the danger of the needle tip sticking to a finger or the like.

Note that, unlike the embodiment of the present invention, at least one notch may be formed in the narrowed portion 13a along the longitudinal direction of the cylindrical body 11. Further, a wide groove may be formed instead of the notch. Thereby, the diameter of the narrowed portion becomes easier than that of the narrowed portion 13a of the embodiment of the present invention, and the injection needle 30 is more easily housed in the cylindrical body. or,
Die-cut holes for facilitating injection molding may be provided on the side wall of the cylindrical body 11 near the narrowed portion.

Further, the flange 12 and the cylindrical body 11 may be formed separately, and these may be joined by ultrasonic welding or friction bonding. Furthermore, if the cylinder 11 is sufficiently longer than the entire length of the injection needle 30, the distal end of the cylinder 11 may be open. Next, a protective sheath 20 for an injection needle according to another embodiment of the present invention will be described.

As shown in FIG. 4, a protective sheath 20 for an injection needle according to another embodiment of the present invention has a distal cylindrical portion 21 made of a hard resin and a proximal cylindrical portion made of a softer resin. 22; a flange 24 for preventing needle sticks formed in the injection needle insertion side opening 22a of the proximal end cylindrical portion 22; and a deviation of the stored injection needle 30 formed in the opening 22a. And an engaging portion 25 for preventing the occurrence of the pressure.

The distal cylindrical portion 21 is made of a relatively hard resin such as polypropylene, which is hard to penetrate the tip of the injection needle 30, and the proximal cylindrical portion 22 is made of a relatively elastic material such as polyethylene. It is made of a soft resin that has The inner diameter and the outer diameter of the distal end cylinder 21 are gradually reduced toward the distal end, and the distal end is closed. A joining surface 21a for joining to a distal end side inner wall of a proximal end tubular portion 22 described later is formed on the outer periphery of the distal end tubular portion 21 on the opening side.
Then, the distal end tube portion 21 is connected to the proximal end tube portion 2 by the joining surface 21a.
2 are joined by ultrasonic welding or friction bonding.

The base tube portion 22 includes a flange portion 24 described later.
Except for the engaging lip portion (engaging portion) 25, the inner diameter and the outer diameter are substantially constant. This inner diameter is formed slightly larger than the outer diameter of the tip for accommodating the locking tip 30a of the injection needle 30. Further, a flange 24 similar to that of the first embodiment is integrally formed around the open end of the base tube portion 22. As in the first embodiment, the flange 24 has a size and a thickness such that the tip of the used injection needle does not pierce the finger holding the vicinity of the opening of the proximal end tubular portion 22. .

An engaging lip 25 is formed in the vicinity of the opening of the inner wall of the proximal end cylindrical portion over the entire circumference of the inner wall toward the center and the distal end of the cylindrical body 23. This engagement lip 25
The portion where is formed is narrower than the other portion of the base cylinder 22, and as a result, a narrowed portion 25 a is formed near the opening 22 a of the base cylinder 22. The inner diameter of the constricted portion 25a is the same as that of the first embodiment.
Although it is slightly smaller than the outer diameter of Oa, it is large enough to allow the engaging tip 30a to expand by elasticity and pass through when the engaging tip 30a is fitted into the throttle portion 25a.

Next, the operation based on such a configuration will be described. The nurse or the doctor inserts the distal end of the injection needle 30 into the cylinder through the proximal opening 22a of the proximal cylinder 22, as in the first embodiment. At this time, the flange 24 prevents the needle tip of the used injection needle 30 from accidentally piercing the skin.
Subsequently, the locking tip 30a of the injection needle 30 is connected to the proximal end cylindrical portion 2.
2 is fitted into the second narrowed portion 25a. Since the material of the engagement lip 25 constituting the narrowed portion 25a is a soft resin, the inner diameter of the narrowed portion 25a can be easily expanded.
0a can easily pass through the throttle section 25a.

When the locking tip 30a passes through the throttle portion 25a, the injection needle 30 is housed in the cylinder as shown in FIG. Once the injection needle 30 is stored, the outer peripheral edge of the locking tip 30a of the injection needle 30 engages with the distal edge 25c of the lip 25 of the cylindrical body and comes out of the proximal opening 22a of the cylindrical body 23. Never. Subsequently, after the injection needle 30 is separated from the syringe body 40 as in the first embodiment, the injection needle 3
0 is disposed of by the waste disposal company together with the protective sheath 20 for the injection needle. At this time, since the distal end cylindrical portion surrounding the needle tip of the injection needle 30 is made of hard resin, even if the distal end cylindrical portion 21 is deformed by some external force, the needle tip may break through the distal end cylindrical portion 21 and protrude. In addition, the used injection needle 30 can be discarded without danger of sticking the needle tip into the skin.

Note that, unlike the above-described embodiment of the present invention, the engaging lip 25 may be provided with at least one notch in the longitudinal direction. By providing this notch, the injection needle 3
0 is further easily inserted into the protective sheath 20. Further, the outer diameter and the inner diameter of the distal end cylindrical portion 21 may be formed in a cylindrical shape without constantly reducing the outer diameter and the inner diameter.

The present invention can be widely used when discarding the injection needle 30 after blood collection or discarding the injection needle 30 after injecting a drug solution into a blood vessel of a patient. Also, in general,
Regardless of the thickness of the needle, the size of the locking tip 30a is substantially the same, so that the protective sheath for injection needles 10 and 20 according to the present invention can be used in a used injection having needles of various thicknesses. It is possible to apply to disposal of the needle 30.

[0030]

The protective sheath for an injection needle according to the present invention comprises:
Since it is composed of a cylindrical body for accommodating the injection needle and a flange formed around the opening at one end of the cylindrical body and for preventing a needle piercing that covers the fingertip of the user holding the cylindrical body, a nurse or doctor When the used needle is stored in the sheath, the flange protects the fingertip so that the needlepoint does not accidentally pierce the skin. Therefore, when the medical staff stores the injection needle in the sheath, it is possible to effectively prevent the medical worker from being infected with an infectious disease such as AIDS or hepatitis B.

Further, since it is extremely small in size as compared with a heat treatment type processing apparatus installed in a treatment room, a doctor or a nurse can always carry the sheath at the time of a round or emergency treatment, and It can be used for procedures such as simple injection and blood collection. In the protective sheath for an injection needle according to claim 2 of the present invention, since the engaging portion for preventing the stored injection needle from deviating is formed at the opening of the cylindrical body, the used injection needle is temporarily inserted into the sheath. When inserted, the locking tip of the injection needle engages with the engagement portion of the sheath, and the injection needle does not fall out of the sheath with vibration during transportation. Therefore, it is possible to effectively prevent a medical worker or a waste disposal company from being infected with an infectious disease due to the puncture of a used injection needle which has fallen out of the sheath during transportation of the sheath accommodating the injection needle.

[0032] In the protective sheath for an injection needle according to claim 3 of the present invention, the cylindrical body is composed of a distal cylindrical portion made of a hard resin and a proximal cylindrical portion made of a softer resin.
After the needle is stored in the sheath, the needle does not pierce the sheath even if the sheath is deformed by external force, preventing healthcare professionals and waste disposal contractors from infecting infections by piercing used needles. It can be more effectively prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view along a longitudinal direction of a protective sheath for an injection needle 10 according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a state in which the injection needle 30 is stored in the injection needle protection sheath 10 according to one embodiment of the present invention.

FIG. 3 is a perspective view showing a state immediately before the injection needle 30 is stored in the injection needle protection sheath 10 according to the embodiment of the present invention.

FIG. 4 is a sectional view along a longitudinal direction of a protective sheath for an injection needle 20 according to another embodiment of the present invention.

FIG. 5 is a longitudinal sectional view showing a state in which an injection needle 30 is housed in a protective sheath 20 for an injection needle according to another embodiment of the present invention.

FIG. 6 is a cross-sectional view along a longitudinal direction of a conventional protective sheath 50 for an injection needle.

FIG. 7 is a perspective view showing a state immediately before accommodating an injection needle 30 in a conventional protective sheath 50 for an injection needle.

[Explanation of symbols]

 10, 20 Injection needle protective sheath 11, 23 Cylindrical body 12, 24 Flange 13, 25 Engagement part 21 Top end cylinder part 22 Base end cylinder part

Claims (3)

[Claims] 1. A cylindrical body for accommodating an injection needle, and a flange formed around one end opening of the cylindrical body and for preventing a needle stick to cover a fingertip of a user holding the cylindrical body. Protective sheath for injection needles. 2. The protective sheath for an injection needle according to claim 1, wherein an engagement portion for preventing the stored injection needle from deviating is formed in the opening of the cylindrical body. 3. The injection needle according to claim 1, wherein the cylindrical body comprises a distal cylindrical portion made of a hard resin and a proximal cylindrical portion made of a softer resin. Protective sheath.