JPH07328119A - Needle protector for injector - Google Patents

Abstract

PURPOSE:To provide a needle protector of an injector capable of simply, accurately and safely covering again a used needle of the injector without sticking a finger by mistake. CONSTITUTION:A protector 20 is made free to stretch axially by combining three cylinder members 22, 24 and 26 made of a resin in a telescope and a base end opening 22a of a base end cylinder member 22 is fixed securely into an injector 12 and a link part 16 of a needle 14. The tip of a tip cylinder member 26 is covered with a film member 32 allowed to be pierced by the needle 14 easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protector for protecting a needle of a syringe, and particularly when a needle of a used syringe is covered with the protector, a doctor or a nurse accidentally sticks the needle into a finger. The present invention relates to a needle protector for a syringe, which is designed to be free from accidents.

[0002]

2. Description of the Related Art A syringe used for treating an infectious disease has bacteria, blood of a patient, etc. attached to a needle, so that the needle is not accidentally stabbed by a doctor or a nurse. The needle is covered with protective equipment. The needle protector of this conventional syringe will be described with reference to FIG.

In FIG. 3A, the protector 10 is made of resin or the like, and is made of a cylindrical member having a slightly tapered end. The inner diameter of the base end opening 10a is configured to be the same as or slightly smaller than the outer diameter of the connecting portion 16 of the syringe 12 and the needle 14, and the base end opening 10a is detachably fitted to the connecting portion 16 by the elasticity of the resin. It can be fixed together.

The conventional protector 10 having such a structure is preliminarily attached to the syringe 12 before use so as to protect the needle 14 from contamination by bacteria, etc., is removed at the time of use, and is reattached after use.

[0005]

In the conventional protector 10 described above, when the needle 14 of the used syringe 12 is reattached, the protector 10 is attached, for example, to the thumb and the index finger as shown in FIG. 3 (b). Then, the needle 14 is moved aiming at the base end opening 10a. The tip of the needle 14 is the base end opening 10a.
If the needle 14 is passed through, the needle 14 can be easily covered with the protector 10 and then fitted and fixed to the connecting portion 16.

However, in an emergency or the like, it is inevitable that the user cannot calm down and aim at the base end opening 10a of the protector 10 accurately, and accidentally pierce his / her finger with the used needle 14. It is easy for dangerous situations to occur.

The present invention has been made in view of the circumstances of the conventional needle protector for a syringe as described above, so that the needle of a used syringe can be reliably covered without piercing a finger or the like. It is intended to provide a needle protector for a syringe.

[0008]

To achieve the above object, a needle protector for a syringe according to the present invention is a protector which is axially expandable and contractable by combining a plurality of cylindrical members made of resin in a telescopic shape. Formed, this protection is loosely fitted to the needle to fit and fix the proximal cylindrical member to the connecting portion of the cylinder of the syringe and the needle, and the protection is in the extended state so as to cover the entire needle, The tip of the protector is provided with a film member that covers the tip and allows the needle to penetrate during contraction.

The protector may be provided with a click mechanism for relatively positioning the cylindrical members in the extended state.

Further, an engaging protrusion capable of engaging with a step provided on the connecting portion may be provided on the base end side of the base end cylindrical member.

The needle protector for a syringe according to the present invention is loosely fitted with a cylindrical member made of resin so as to cover the entire needle, and its proximal end opening is detachably attached to the connecting portion between the cylinder of the syringe and the needle. It can be fitted and fixed, and a flange portion having a large outer diameter can be connected to the outer periphery of the base end opening.

The flange portion may be formed in a trumpet shape whose inner diameter increases from the base end opening toward the front.

Furthermore, it is also possible to provide an engaging projection that can engage with a stepped portion provided on the connecting portion on the inner peripheral surface of the trumpet-shaped flange portion.

[0014]

[Operation] In the needle protector for a syringe according to claim 1, the entire needle is covered by the extended protector whose tip is covered with the membrane member, and the needle of the syringe before use is not contaminated. If the protective device is contracted immediately before use and the film member is penetrated by the needle at the same time, the needle is exposed. Furthermore, after use,
Re-extension of the protective device may cover the entire needle.

Further, in the needle protector of the syringe according to the second aspect, since the relative position of each cylindrical member in the extended state of the protector is made by the click mechanism, the protector is extended again after use. The operation can be done easily and surely.

Further, in the needle protector of the syringe according to the third aspect, the engaging protrusion provided on the proximal end cylindrical member is engaged with the step provided on the connecting portion between the syringe and the needle. Therefore, when the protective device is extended again, the protective device does not come off the syringe.

Further, in the needle protector of the syringe according to the fourth aspect, since the flange portion having a large outer diameter is connected to the outer periphery of the base end opening of the protector, the needle is inserted into the base end opening. Even if the tip of the needle shifts, it does not come into contact with the flange portion and accidentally pierce a finger or the like that clamps the protector.

In the needle protector of the syringe according to the fifth aspect, since the flange portion has a trumpet shape, the tip of the needle is easily guided to the proximal end opening portion by being guided by the trumpet flange portion. obtain.

Further, in the needle protector of the syringe according to the sixth aspect, the engaging protrusion provided on the inner peripheral surface of the trumpet-shaped flange portion can be engaged with the step portion of the connecting portion. Therefore, when the needle is covered with the protector, the protector does not accidentally come off from the syringe due to the action of the engaging protrusion.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. 1A and 1B show an embodiment of a needle protector for a syringe of the present invention, wherein FIG. 1A is a vertical cross-sectional view of a state in which the protector is extended, and FIG. 1B is a vertical cross-sectional view of a contracted state. c)
Is a partially enlarged sectional view showing a click mechanism, and (d) is a partially enlarged sectional view showing an engaging protrusion.

In FIG. 1, the protector 20 is constructed so that three cylindrical members 22, 24, and 26 made of resin are combined in a telescope shape so as to be expandable and contractable in the axial direction. Protrusions 28 having a semicircular cross section are provided in the circumferential direction on the outer circumferences of the proximal end cylindrical member 22 and the intermediate cylindrical member 24, respectively. U around which the protrusions 28, 28 can be fitted in the circumferential direction
Grooves 30, 30 are provided respectively. These protrusions 2
8, 28 and the U-grooves 30, 30 perform relative positioning of the cylindrical members 22, 24, 26 in the extended state, and form a click mechanism for restricting further extension. In this click mechanism, the protrusions 28, 28 may have a cross-sectional shape such that one is a slope and the other is a step.

Further, a film member 32 made of a resin film or the like through which the needle 14 can easily penetrate is provided so as to cover the distal end opening of the distal end cylindrical member 26. Further, the base end cylindrical member 2
The base end opening 22a of No. 2 has an inner diameter that can be fitted to the connecting portion 16 of the syringe 12 and the needle 14, and the base end opening 22a.
Is extended beyond a flange-shaped step portion 16a provided in the connecting portion 16, and an engaging protrusion 34 that can engage with the step portion 16a is formed in this extended portion.

In such a construction, the syringe 12 before use
In this case, the entire needle 14 is covered with the protector 20 in the extended state, and the needle 1 is cooperated with the membrane member 32.
No contamination of 4. Moreover, the respective cylindrical members 22, 24, 26 in the extended state are relatively positioned by the click mechanism of the protrusions 28, 28 and the U-grooves 30, 30 so that they do not accidentally come off or contract. Then, when the protector 20 is contracted by applying a force immediately before use, the needle 14 is exposed by penetrating the membrane member 32 and becomes usable. Further, after use, the protector 20 is set to the extended state again and the needle 14
Try to cover the whole. Here, each cylindrical member 22, 2
The movement of the protrusions 4, 26 in the extension direction is restricted when the protrusions 28, 28 are fitted into the U grooves 30, 30 and does not come off. Moreover, the base end cylindrical member 22 has the engagement projection 3
4 prevents the protector 20 from coming off the connecting portion 16 by being locked to the step portion 16a of the connecting portion 16.

In the above embodiment, the protector 20 is configured so as not to come off from the connecting portion 16 by the engaging protrusion 34, but the present invention is not limited to this, and the base end cylindrical member 2 is not limited thereto.
2 may be adhesively fixed to the connecting portion 16 using an adhesive.

Next, another embodiment of the present invention will be described with reference to FIG. 2A and 2B show another embodiment of the needle protector for a syringe of the present invention, FIG. 2A is a vertical cross-sectional view of the state where the protector is mounted on the syringe, and FIG. It is a figure explaining the effect at the time.

In FIG. 2, the protector 40 is made of a resin, and is constructed so that the distal end of a cylindrical member 42 having a taper shape with a slightly thin tip is closed so that the base end opening 40a can be fitted and fixed to the connecting portion 16. It Further, a trumpet-shaped flange portion 44 having a large outer diameter and a larger inner diameter toward the front is integrally connected to the outer circumference of the base end opening 40a. Further, on the inner peripheral surface of the trumpet-shaped flange portion 44, an engaging projection piece 46 capable of engaging with the step portion 16a of the connecting portion 16 is provided.

In such a structure, the syringe 12 before use
And the needle 14 is prevented from being contaminated. Here, in the protector 40, the base end opening 40a is fitted and fixed to the connecting portion 16, and the engaging projection 46 is engaged with the step portion 16a to prevent the protector 40 from coming off.

When the protector 40 is strongly pulled out from the syringe 12 during use, the fitting with respect to the connecting portion 16 is released, and at the same time, the engaging projection 46 is elastically deformed and the protector 4 is removed.
Allow 0 movement.

Further, after use, the cylindrical member 42 is sandwiched by fingers, and the needle 14 is moved toward the base end opening 40a. Even if the tip of the needle 14 is displaced from the base end opening 40a, the tip of the needle 14 does not come into contact with the flange portion 44 having a large outer diameter, and the finger or the like is not stuck. Then, guided by the trumpet-shaped flange portion 44, the tip of the needle 14 is easily inserted into the proximal end opening 40a. Then, again the base end opening 4
If 0a is fitted and fixed to the connecting portion, there will be no accident that the used needle 14 is stabbed by a doctor or a nurse. It is needless to say that the engaging projection 46 is elastically deformed to allow the mounting upon the remounting, and is engaged with the step portion 16a after the mounting.

In the embodiment shown in FIG. 1, instead of the protector 20 which is telescopic and expands and contracts in the axial direction, it is expanded or contracted in bellows or a flexible plate is wound in a spiral shape. You may make it expand-contract in an axial direction. Then, if necessary, a mechanism for maintaining the extended state and the contracted state is appropriately provided.

[0031]

As is apparent from the above description, the needle protector for a syringe of the present invention has the following special effects.

The needle protector for a syringe according to claim 1 can be switched between a state in which the entire needle is covered and a state in which the needle is exposed by expanding and contracting the telescope-like protector. It is extremely easy, the needle can be easily and surely covered in the used syringe, and the finger etc. are not accidentally stabbed.

In the needle protector of the syringe according to the second aspect, the extension of the protector is restricted by the click mechanism, and the protector is prevented from being unnecessarily disassembled by being extended more than necessary.

Further, in the needle protector of the syringe according to the third aspect, the engaging projection is engaged with the stepped portion provided at the connecting portion between the syringe and the needle, so that the protector does not accidentally come off from the syringe. , It's that safe.

Further, since the needle protector of the syringe according to the fourth aspect has the flange portion having a large outer diameter, it is possible to prevent accidental sticking of a needle to a finger for sandwiching the protector and the like, which is highly safe. .

Further, in the needle protector of the syringe according to the fifth aspect, the needle can be easily guided to the proximal end opening by the trumpet-shaped flange portion, and the protector can be easily reattached.

Further, in the needle protector for a syringe according to the sixth aspect, the engaging protrusion prevents the protector from being accidentally disengaged from the syringe, which is excellent in safety.

[Brief description of drawings]

1 shows an embodiment of a needle protector for a syringe of the present invention,
(A) is a longitudinal sectional view of the protective device in an extended state,
(B) is a longitudinal sectional view of a contracted state, (c) is a partially enlarged sectional view showing a click mechanism, and (d) is a partially enlarged sectional view showing an engaging protrusion.

FIG. 2 shows another embodiment of the needle protector for a syringe of the present invention, (a) is a vertical cross-sectional view of the state where the protector is attached to the syringe, and (b) is the re-attacher of the protector. It is a figure explaining the effect at the time.

FIG. 3 shows a conventional protector for a syringe, (a) is a vertical cross-sectional view of the protector attached to the syringe, and (b) is a diagram for explaining a danger when the protector is reattached. Is.

[Explanation of symbols]

 10, 20, 40 Protective equipment 10a, 22a, 40a Base end opening 12 Syringe 14 Needle 16 Connecting part 16a Stepped portion 22, 24, 26, 42 Cylindrical member 28 Projection 30 U groove 32 Membrane member 34 Engagement projection 44 Flange part 46 Engaging protrusion

Claims (6)

[Claims] 1. A plurality of cylindrical members made of resin are combined in a telescopic form to form an axially expandable / contractible protective member, and the protective member is loosely fitted to a needle so that the proximal cylindrical member serves as a syringe cylinder. A membrane member fitted and fixed to the connecting portion of the needle so as to cover the entire needle with the protective device in an extended state, and covers the distal end of the protective device and allows the needle to penetrate during contraction. A needle protector for a syringe characterized by being provided with. 2. The needle protector for a syringe according to claim 1, wherein the protector is provided with a click mechanism for relatively positioning the cylindrical members in an expanded state. 3. The needle protector for a syringe according to claim 1, wherein an engaging protrusion capable of engaging with a stepped portion provided on the connecting portion is provided on a proximal end side of the proximal end cylindrical member. A needle protector for syringes. 4. A cylindrical member made of resin is loosely fitted so as to cover the entire needle, and its proximal end opening is detachably fitted and fixed to a connecting portion between a cylinder of a syringe and the needle. A needle protector for a syringe, characterized in that a flange portion having a large outer diameter is connected to the outer periphery of the base end opening portion. 5. The needle protector for a syringe according to claim 4, wherein the flange portion is formed in a trumpet shape whose inner diameter increases from the base end opening toward the front. Ingredient 6. The needle protector for a syringe according to claim 5, wherein an engaging protrusion capable of engaging with a stepped portion provided on the connecting portion is provided on an inner peripheral surface of the trumpet-shaped flange portion. A needle protector for a syringe characterized in that