JP2002510534A - Injection needle protection device - Google Patents

Abstract

(57) Abstract: An injection needle protection device including a protection cylinder (30) having a through hole for holding a body of a syringe (10), and a spline (32) extending longitudinally inside the through hole. ) Or a rib, and a discontinuity is formed in the spline to hold the outer peripheral portion (57) of the lock member (50), and the lock member is incorporated into the syringe and extends outward from the barrel of the syringe. , Engages with a discontinuous portion formed at a position coinciding with the side wall opening (34) of the protective cylinder.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD OF THE INVENTION

 The present invention relates to an injection needle protection device.

[0002] The present invention particularly relates to a device for preventing an injection needle from sticking into a human body,
As this will be explained, the present invention also helps prevent repeated use of the injection needle.

[0003]

2. Description of the Related Art

The syringe has a tubular body with a narrow opening at one end of the body communicating with a nozzle on the outside of which a needle is selectively mounted. At the other end of the body, there is a finger pad constituted by a flange or the like that protrudes symmetrically in the lateral direction, and further, a piston for pushing out the injection solution stored in the body through the nozzle. .

[0004] A syringe equipped with an injection needle is used to inject a liquid such as an injection liquid into a blood vessel of a human or animal. Syringes fitted with injection needles are also used to collect fluids such as blood from human or animal blood vessels.

[0005] The use of syringes, in particular, causes needles to become contaminated with microorganisms associated with AIDS (acquired immunodeficiency syndrome), hepatitis, tetanus, and tuberculosis.

[0006] Infectious microorganisms such as those described above can be transmitted from person to person by repeated use of contaminated needles or by accidental sticks to the skin of medical personnel.

[0007] Various protective sleeves have been devised to prevent accidental sticks of injection needles into humans and / or infection due to repeated use of injection needles. These are slidably mounted on the body of the syringe to move between a non-operation position where the tip of the injection needle is exposed and an operation position where the tip of the injection needle is surrounded by the tip of the protective tube. is there. Some examples of protective tubes are disclosed in U.S. Patent No. 5,595,566 (Valleluga January 1997).

The protective cylinder has a through hole, and an internal groove is formed in the through hole to engage with a lock member incorporated in the syringe. The protection cylinder is usually manufactured by injection molding, and the groove in the through-hole is machined using another tool after molding. The processing of the internal groove is complicated and becomes an extra operation step in the production of the protection tube. As a result, the cost of manufacturing the protection tube is considerably high.

To overcome the problems associated with machining internal grooves, Becton Dickinson
n A syringe barrel manufactured by Dickinson) has a plurality of protrusions formed therein, which serve as abutments. These projections are densely arranged at equal intervals on the inner circumference of the protection cylinder. These projections are furthermore arranged alternately on either side of the circumferential virtual zone, between which the flange-like locking members incorporated in the syringe engage.

[0010] This protective cylinder is simpler to manufacture than the one described above, but requires two cores (cores) that are drawn out to both ends of the protective cylinder during the manufacturing process. Therefore, the inside diameter of the opening at one free end of the protective cylinder surrounding the tip of the injection needle must be larger than the outside diameter of the flange of the lock member extending outward from the syringe barrel. As a result, the inner diameter of the free end of the protective cylinder becomes large, and there is a risk that a person inserts a finger and stabs the finger with the tip of the injection needle. Syringes fitted with such protective sleeves are dangerous, especially if touched by curious children.

[0011] In order to solve this problem, Becton Dickinson provides a cap to be attached to the tip of the protective tube as needed. However, there is a risk that the injection needle is pierced by attaching the cap to the protective cylinder itself.

Furthermore, the protrusion formed close to the inner surface of the trunk increases the strength of the protection cylinder, but hinders the deformation of the protection cylinder when the lock member comes into contact with the protrusion and slides. As a result, the resistance when the lock member slides in the vicinity of the protruding portion increases, and a force is required to slide the protective cylinder against the barrel of the syringe, and the flanges of the lock member are alternately arranged. It is held diagonally between the projected portions.

Further, the lock member held obliquely between the protruding portions is easily released when a force is applied from the free end side of the protective tube. As a result, the needle and syringe can be reused and, even if discarded, there is a risk of the needle tip being accidentally stabbed by a person.

[0014] Furthermore, many of the above-mentioned protective cylinders require modification of the syringe when attached to an existing syringe. Modifications, such as attaching external flanges, require replacement of existing dies and tools and / or extra work steps during the manufacturing process, which increases manufacturing costs and can temporarily interrupt product supply. There is.

[0015] Furthermore, it is necessary to use both hands to move the protection cylinder between the non-operation position and the operation position. Usually, one hand holds the syringe and the other hand moves the protective cylinder.

[0016] Persons involved in surgical treatment need to administer a drug solution using a syringe needle, but often a body fluid such as blood adheres and the hand becomes slippery. As a result, there is a danger that the tip of the sharp needle is stabbed in the hand by slipping the hand on the surface of the protective cylinder to be operated.

In addition, at the time of injection, the area around the point where the injection needle is pierced on the skin of the patient is pressed by hand to reduce scratches when the injection needle is pierced or pulled out. Most preferably, the protective sleeve can be operated with one hand and surround the needle as it is withdrawn from the skin.

An object of the present invention is to solve the above-described problems and to provide a reliable and efficient use of an injection needle protection device.

[0019]

[Means for Solving the Problems]

An injection needle protection device according to one aspect of the present invention is a protective cylinder having a through-hole into which a barrel of a syringe is inserted. The through-hole has a non-engageable engagement with a lock member that is incorporated into the syringe and extends outside the barrel. A spline or rib having a continuous portion is included.

[0020] An injection needle protection device according to another aspect of the present invention is a protective cylinder having a through-hole into which a barrel of a syringe is inserted. The through-hole extends along the depth of the through-hole, and is incorporated in the syringe to be incorporated into the barrel. And a spline or a rib having a discontinuous portion that engages with a lock member extending outwardly of the protective tube. This discontinuous portion is desirably formed by a member that is pulled out of the opening of the protective cylinder side wall during the molding process.

Desirably, the protection cylinder has a plurality of splines spaced apart in the circumferential direction, and forms a discontinuous portion at a position corresponding to the opening of the side wall of the protection cylinder, and each discontinuous portion is formed in the protection cylinder. It is good to line up in the horizontal direction.

The spline extends over most or a specific portion of the length of the protective sleeve.

It is desirable that the spline of the protection cylinder frictionally engages with the locking member, and the frictional resistance of the locking member during movement with respect to the protection cylinder is related to the capability of the protection cylinder, that is, the deformability of a predetermined portion. In particular, at least some splines are separated by an elastically deformable wall portion of the protective sleeve. For example, the protective cylinder is made of an elastically deformable synthetic resin material such as high-density polypropylene, and has a thinner wall than that of a portion where a spline is provided.

In a certain protective cylinder, a small number of two or three splines are provided at equal intervals in the circumferential direction in the through hole, and each spline is separated by an elastically deformable wall portion.

In another protection cylinder, splines form independent groups, and the groups are provided at equal intervals in the circumferential direction. Preferably, the groups are separated by elastically deformable walls, and the circumferential spacing between the groups is wider than the width of the groups.
For example, in a preferred embodiment of the through-hole, two pairs of splines are provided in opposing positions within the through-hole, with the circumferential spacing between the pairs being wider than the circumferential spacing occupied by the paired splines. I have.

In addition, the protection cylinder is provided with an external grip means for holding the protection cylinder when its position is changed. The grip means is processed on a rough surface having irregularities. Alternatively, the grip means may be one or more ribs provided on a part of the side surface of the protective cylinder. Further, the grip means may be provided near the discontinuous portion. For example, in a preferred embodiment of the protective cylinder, annular ribs or flanges are provided on both sides of the opening of the protective cylinder.

According to another aspect, the present invention relates to a method of manufacturing a protective cylinder having a through-hole for inserting a barrel of a syringe, wherein the through-hole is provided with a spline extending along at least a part of the protective cylinder. Is provided with a discontinuous part in the middle of. The discontinuity is for engaging a locking member incorporated in the syringe. In this manufacturing method, on the contact surface, a molded concave portion that matches the external shape of the protective cylinder to be produced is formed, and two blocks having a projected portion that forms a discontinuous portion protrude from one molded concave portion are prepared. Prepare a core having a groove that matches the internal shape of the protection cylinder to be manufactured and that matches the spline. A molding space is formed by the two molding recesses. The core is held in the molding space, and the protrusion is free. The two blocks are joined by aligning the contact surfaces so that the ends are engaged with the grooves of the main core, and the curable synthetic resin is injected into the molding space through a resin flow path communicating with the molding space. And a step of separating the synthetic resin protective tube from the core.

In yet another aspect, the present invention provides a syringe having a through-hole into which a barrel can be inserted, the through-hole extending along at least a portion of the protective cylinder, and being incorporated into the syringe in the middle thereof. The present invention relates to a method for manufacturing a protective cylinder provided with a spline having a discontinuous portion with which a lock member engages, the method including forming a molded concave portion on an abutting surface that matches the outer shape of the protective cylinder to be manufactured. Prepare two blocks, a core having a groove that matches the internal shape of the protection tube to be manufactured and match the spline, and a pin that selectively extends into this groove to form a discontinuity in the spline. Prepare and form the molding space by the two molding recesses, connect the two blocks together with the contact surfaces so that the core is held in the molding space and the pin separates part of the groove, and the cavity is penetrated Contributes to the formation of holes, Are supported in the through groove, and the two blocks are joined together by aligning the contact surfaces so that the free end of the projection engages with the groove of the main core, into the molding space through the resin flow path communicating with the molding space. It involves injecting curable synthetic resin, separating the two blocks, pulling out the pins, and separating the synthetic resin protective tube from the core.

In yet another aspect, the invention is mounted in an assembled condition to a syringe having a barrel having at one end a narrow opening communicating with a nozzle to be externally located and to which a syringe needle is selectively mounted. An injection needle protection device, which is attached to the body of a syringe, and has a non-operating position where the tip of the injection needle is exposed and can be injected into human skin, and the tip of the syringe needle is surrounded by a protective cylinder and the tip of the syringe is A sleeve-shaped protective cylinder that can be moved between the operating position where there is no danger of accidentally piercing a person and has a discontinuous part in the middle, placed in the protective cylinder so as to be movable in the protective cylinder, and placed on the syringe A locking member having an edge extending outwardly from the side wall of the syringe when it comes to the discontinuity and engaging to hold the protective barrel in the operative position; and the syringe. Protection to hold the locking member with A holding means is formed inside the tube.

The protective cylinder is desirably made of an elastically deformable synthetic resin material, and is usually of the type described above. The discontinuous portion is a break point of a spline that extends to at least a part of the through hole of the protection cylinder. The discontinuous portion coincides with the opening provided on the side wall of the protection cylinder. The discontinuous portion is desirably formed in a molding process using a member pulled out from the side wall opening of the protective cylinder.

It is desirable that the protective cylinder is provided at one end thereof with a positioning means for incorporating the lock member into the syringe. For example, the positioning means is a sheet or a flange formed at one end of the protective cylinder and having a narrowed portion. Alternatively, the positioning means may be a plurality of abutting portions provided at equal intervals on the inner surface of the protection cylinder and abutting against the lock member.

The lock member is desirably provided with an opening or a through-hole, and a body or a nozzle, which is a part of the syringe, extends through the through-hole. For example, the locking member is a washer, which is made of an elastically deformable material and has a mounting opening for receiving a nozzle. Alternatively, the washer may be a split washer that can be contracted and expanded in order to get over some obstacle in the protective cylinder or to spread out at a discontinuous portion.

Preferably, when the washer is attached to the nozzle, most of the nozzle is exposed and the hub of the injection needle is engageable.

Another form of locking member includes a laterally expanding portion, such as an outwardly directed annular flange, that engages a discontinuity in the protective sleeve, and a barrel having a through hole for receiving a syringe nozzle. It may be.

The body includes fixing means for fixing the hub of the injection needle to the lock member.
In one embodiment of the fixing means, the injection needle is selectively removably attached to the lock member. However, in another embodiment, the needles are engaged so that a substantial force is required to separate the needle from the locking member. For example, the securing means has a recess for receiving the hub of the injection needle and means for retaining the hub of the injection needle mounted in the recess. The attachment means has a plurality of inwardly directed protrusions, such as barbs, flanges, and screw portions,
These hold the hub of the injection needle during operation.

[0036] In some embodiments, the locking member has a connection that ensures communication between the syringe nozzle and the injection needle. For example, the connection is surrounded by the recess and held by friction inside the hub of the injection needle. The connecting part desirably communicates with a through hole in which the nozzle of the syringe is located.

In one embodiment, the retaining means is integral with the locking member and engages an adjacent portion of the syringe, such as a barrel or nozzle. For example, the holding member has one or a plurality of barb-like protrusions provided inside the through-hole.

In another embodiment, the retaining means is part of a locking member adapted to be screwed into the thread of the syringe.

[0039] In yet another embodiment, the retaining means is part of a locking member that is sandwiched between opposing portions of the syringe.

However, in other embodiments, the holding means is a combination of the various features described above. For example, a portion of the locking member that is sandwiched between opposing portions of the syringe includes one or more barbs that engage the surface of the syringe.

In addition, the holding means includes, for example, a holding washer attached to a nozzle, and one or more barbs protruding inward are provided in the opening of the washer, and are inserted into the opening. Nozzle.

The force required to move the holding means so that the locking member comes off the syringe is:
When the protection cylinder moves between the non-operation position and the operation position, it is desirable that the protection cylinder be larger than the force applied to the lock member from the protection cylinder.

In yet another aspect, the invention relates to a method of attaching a needle protector of the type described above to a nozzle of a syringe, the method comprising providing an assembled needle protector, wherein the locking member comprises a holding means. And inserting the barrel of the syringe fixed inside into the protective cylinder.

As yet another aspect, the present invention relates to a method of using the above-mentioned type of needle protection device for preventing a needle from being stabbed, wherein the injection needle protection device is attached to a syringe equipped with the injection needle. ing. The method includes the step of shielding the tip of the injection needle such that the injection needle is surrounded by a protective cylinder and a part of the lock member is engaged with the discontinuous portion of the protective cylinder and held in the shielding operation position. ing.

The user can shield the injection needle by moving the protective cylinder in the direction of the injection needle.

In addition to this, the user can hold the protective tube by hand, and can also shield the injection needle by pulling the syringe and the injection needle attached thereto.

However, when the tip of the injection needle is stuck in the patient's skin, it is preferable to move the protection cylinder in the direction of the injection needle so that the tip of the protection cylinder touches the skin. Next, the injection needle is pulled into the protective cylinder while the protective cylinder is in contact with the patient's skin. As a result, since the tip of the injection needle is not exposed, there is no danger of accidentally touching the tip of the injection needle.

In yet another aspect, the invention relates to a locking member attached to a syringe. The lock member includes a side portion that extends outside the body of the syringe when the lock member is attached to the syringe, an attachment means for attaching the lock member to the syringe, and a lock member that prevents separation of the lock member from the syringe. An associated holding means; and a securing means for securing the syringe hub to the locking member, characterized in that the needle hub secured to the locking member is in communication with the nozzle of the syringe.

The attachment means preferably has a through hole for receiving a part of the syringe, such as a barrel or a nozzle.

The retaining means has an internally threaded through-hole that engages a portion of the syringe, such as a threaded nozzle or threaded barrel. Alternatively, the retaining means may be one or more thorns provided in the through-hole and engaged with the nozzle or barrel of the syringe during use.

The securing means can include a recess for receiving the hub of the syringe. The recess may have an internal thread into which the end of the hub of the injection needle is screwed. Alternatively, the recess includes one or more inwardly directed protrusions, and the protrusions are displaced by the needle hub when the hub of the needle is in the recess. However, it is desirable that the protrusions be resistive when trying to separate the hub from the recess. In another form, the recess is provided with one or more inward abutments to hold the end of the hub in abutment. The recess is further provided with a guide and a stopper for assisting the operating position of the end of the flange.

In one embodiment, the locking member is provided with a connecting member that communicates the nozzle with the hub of the injection needle. For example, the connecting member includes a connecting portion that is surrounded by the recess and frictionally engages with the inside of the hub of the injection needle. The connecting portion desirably communicates with a through hole into which the nozzle of the syringe is inserted.

The lock member is desirably used in combination with the above-described type of protection cylinder. For example, a protective barrel with a built-in locking member is attached to a syringe consisting of a cylindrical body having at one end a narrow outlet communicating with a nozzle to which a syringe needle is selectively attached.

In yet another aspect, the present invention provides a cylindrical body having a narrow outlet at one end communicating with a nozzle to which a syringe needle is selectively mounted, a finger rest provided at the other end of the body, and a piston. The present invention relates to a needle protection device used in combination with a syringe having a type having a non-operating position in which the tip of the syringe needle is mounted on the body of the syringe and the tip of the syringe needle is free of the protection barrel. A tubular protective cylinder that moves between an operative position surrounded by an end, and a protective cylinder provided on the protective cylinder, in which a user holds the barrel of the syringe by touching two fingers to a finger pad, and disengages the protective cylinder. Movement of the protective sleeve between the actuated positions includes a finger fixation means which is performed by the thumb of the hand.

The finger fixing means is located at the rear of the protection cylinder located near the finger pad of the syringe when the protection cylinder is mounted.

In one embodiment, the finger fixing means may be a rough surface having irregularities, a notch formed on a part of the protective cylinder, or a plurality of ribs.

Another form of the finger contact means includes a concave portion formed in the wall portion of the protective tube, and the concave portion receives the thumb of the user. Therefore, the concave portion is formed in a shape corresponding to the thumb.

In yet another form, the protective barrel is formed with a flange or guard that extends outward, and possibly to the syringe, toward the finger rest. The protective barrel is also positioned so that the finger fixing means is on one side of the finger pad when the user attaches the protective barrel to the syringe. For example, the positioning means may include a finger pad on the protective cylinder such that the finger pad abuts when accurately positioned with respect to the protective cylinder.

In another aspect, the present invention relates to a method of using a needle protector of the type described above to prevent the tip of a needle from being accidentally pierced. A tubular body formed at one end with a narrow outlet communicating with a nozzle attached to the, a finger rest provided at the other end of the body, and attached to a syringe having a piston,
In this method, put the finger on the finger pad, hold the syringe with two fingers, apply the thumb of the same hand to the fixing means, and protect the syringe needle so that the tip of the needle is surrounded by the protective tube. Each step includes moving the cylinder, and the movement is performed by the pressure of the thumb and two fingers applied to the fixing means and the finger rest, respectively.

[0060]

BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a typical syringe 10 made of a transparent synthetic resin material. Syringe 1
Numeral 0 has a cylindrical tubular body, that is, a body 11, and a narrow outlet at one end thereof communicates with a nozzle 13 on the outside thereof, and an injection needle 14 is selectively attached to this nozzle. The outer peripheral surface of the nozzle has a tapered shape called Luer taper.

At the other end of the cylindrical portion 11, a finger contact portion 9 including a pair of flanges 8 projecting symmetrically in the lateral direction is provided.

The syringe 10 is also provided with a piston 15 having a head 16 that slides inside the body 11 in a sealed state, and the injection liquid stored in the body 11 is pushed out from the nozzle 13 by this piston. .

The injection needle 14 shown in FIG. 2 is a tubular needle 19 whose base end 18 has a conical hub 17.
And the tip 20 is sharp. As shown in FIGS. 3 and 9, the hub 17 is a conical recess 21 and is held by the nozzle 13 by friction. The hub 17 is formed with an elliptical flange 5 having opposite ends 6.

Typically, the syringe 10 and the needle 14 are provided separately packaged, and the tip 20 of the needle 14 is protected by a removable sheath or cap (not shown).

FIGS. 4 to 7 show a substantially cylindrical protective cylinder 30 mounted on the barrel 11 of the syringe 10. The protective cylinder 30 is desirably made of an elastically deformable transparent synthetic resin material such as high-density polypropylene.

The protection cylinder 30 has an internal through hole 31 that is open at both ends. The main portion 44 of the through hole 31 has an inner diameter slightly larger than the outer shape of the body 11 of the syringe 10.

In the through hole 31, two pairs of splines 32 are formed which extend over substantially the entire length of the main portion 44, and the splines of each pair are parallel to each other. Furthermore, the paired splines 32 are close together, and the circumferential width of one pair of splines 32 is much smaller than the spacing between the spline pairs. As a result, spline 3
The wall 45 easily deforms between the two pairs. The interval between the splines 32 that are diametrically opposed is slightly larger than the outer diameter of the barrel 11 of the syringe 10.

The spline 32 is interrupted by a discontinuous portion 33 on the way, and the discontinuous portion forms an internal annular groove 33 a. The discontinuous portion 33 of each spline 32 communicates with an opening 34 formed in the side wall 35 of the protection cylinder.

The opening 34 is surrounded by two annular ribs 36 and 37 projecting outward. Shallow recesses 38 and 39 are formed in the spline 32 inside the opposite sides of each rib 36, 37.

At one end, the protective cylinder 30 has a tubular end 40 having an inner diameter smaller than the inner diameter of the other end 41 and the outer diameter of the barrel 11 of the syringe. Four ribs 42 serving as reinforcement are formed at equal intervals inside the tubular end portion 40, and eight short ribs 43 are formed at an end adjacent to the protective cylinder main body portion 44.

The protection cylinder 30 is also provided with finger fixing means 100 extending outward from the protection cylinder, as shown in FIG. 6A, and 101 extends out of the protection cylinder 100 without fail. The finger pad 9 of the syringe abuts on the back surface 102 of the flange 101 of the finger pad.

The protective cylinder 30 is desirably manufactured by injection molding, and uses two blocks (molds) that match the external shape of the protective cylinder 30. In addition, a cylindrical core (core) conforming to the internal shape of the protective cylinder 30 is used in a molding space formed between the two joined blocks. Each opening 34 and the discontinuous portion 33 communicating therewith are formed by each projection provided to fix the core in the molding space. A sufficient amount of molten resin is injected into the molding space through a resin flow path communicating with the molding space, and when the resin solidifies, the molded protective cylinder is separated from the core. The recesses 38 and 39 are formed as a result of the cooling of the resin material of the ribs 36 and 37 being delayed as compared with the other thin portions.

FIGS. 8 and 9 show a lock member 50 made of a synthetic resin material. The locking member 50 has a cylindrical body portion 51 and an outer annular flange 57 having an outer diameter slightly larger than both the outer diameter of the barrel 11 of the syringe and the distance between the opposed splines 32.
Preferably, the height of the locking member, indicated by arrow 58, is less than the distance between diametrically opposed splines 32.

The locking member 50 also has a through hole 52 formed by a continuous wall 53 having a taper that matches the taper of the nozzle 13 of the syringe 10. The wall 53 has a plurality of barbs 54 directed inward. The through hole 52 communicates with the central recess 55,
A plurality of protrusions 56 protrude inward in the recess 55.

As shown in FIG. 10, the protection cylinder 30 and the lock member 50 are provided to the user in a usable state as the injection needle protection device 60 in combination, and the barrel of the syringe is mounted before the injection needle 14 is mounted. 10 can be selectively attached. The lock member 50 may be inserted into the through hole 31 of the main body portion 41 of the protective cylinder 30 and may be pressed using a tool between the positions adjacent to the reduced diameter end portion 40 as shown in FIG. desirable.
Preferably, the annular flange 57 is adjacent to the end 61 of the rib 43.

In use, as shown in FIG. 13, the body 11 of the syringe 10 is inserted into the through hole 31 with the nozzle facing forward, and the injection needle protection device 60 is mounted on the body 11 of the syringe 10. As shown in FIG. 14A, it is desirable that the nozzle 13 be pushed into the through hole 52 of the lock member 50 so that the outer surface of the nozzle and the tapered wall 53 of the lock member 50 are engaged by friction. The lock member 50 is further securely held on the nozzle 13 by engagement of the plurality of barbs 54 with the outer surface of the nozzle.

When the finger contact portion 9 of the syringe body 10 is aligned with the finger contact flange 101 of the protective cylinder 30, as shown in FIGS. 14A and 14B, the side edge portion 7 of the finger contact portion and the contact portion 102 It is desirable that the contact be made.

The hub 17 of the injection needle 14 is pressed against the projection 56, and as shown in FIG.
The protrusion 56 is temporarily displaced and held by frictional engagement between the outer surface of the nozzle 13 and the tapered side wall of the conical recess 21. Thereafter, as shown in FIG. 17, the cover 90 covering the injection needle is removed.

At this time, the assembly of the syringe and the injection needle is in a state similar to the assembly 70 shown in FIGS.

In this state, the protection cylinder 30 is at the non-operation position where most of the injection needle 10 including the tip 20 is exposed.

When the tip 20 of the injection needle is immersed in the liquid and the piston 15 is pulled as shown in FIG. 18, the liquid is sucked into the barrel of the syringe through the injection needle 19.

If the human body is not injected for a while after the liquid has been inhaled into the body 11, the protective cylinder 3
0 can be advanced to the front end operating position shown in FIG. 19, and the tip 20 of the injection needle can be surrounded by the end 40 of the protective tube. When performing an injection, the protective cylinder 30 is retracted to the inoperative position shown in FIG.

The user holds the syringe 10 by applying two fingers 121 to the finger contact portion 8, pierces the tip 20 of the injection needle 14 into the skin of the human body, and pushes the free end 6 of the piston 15 to the thumb 120.
, The liquid in the torso 11 can be injected into the blood vessel of the patient.

When the injection is completed, the protective cylinder 30 is advanced on the torso 11, and the front end portion 40 is brought into contact with the patient's skin. Then, the injection needle 19 is pulled out while the front end portion 40 is in contact with the skin of the patient, and is housed in the protective tube 30.

[0086] The frictional engagement between the annular flange 57 and the spline 32 causes some local deformation of the protective cylinder when the protective cylinder 30 moves on the body 11, but the sliding resistance during the movement is reduced. The flexibility of the wall 45 can at least partially overcome it.

When the annular flange 57 comes to the concave portion 38, the flange 57 is engaged with the concave portion 38 and emits a sound, so that the engagement can be confirmed. Since the recess 38 is quite shallow, the flange 5
The engagement between the recess 7 and the recess 38 is easily released, and the user can expose the tip 20 of the injection needle from the protective tube 30 to perform a second injection or aspirate the injection solution. This is because when the injection solution in the syringe is gradually and gradually injected in the medical stage, the tip 20 of the injection needle is temporarily shielded by the tip 40 of the protective cylinder while the syringe assembly 70 is not used. It is important in that you can do it.

However, when the syringe 10 is not to be reused, as shown in FIG. 12, the annular flange 57 of the locking member is moved to the operating position where it is held by the discontinuous portion 33 between the opposing spline ends 75. The protection cylinder 30 is advanced. At this time, a sound notifying the engagement of the annular flange 57 with the discontinuous portion 33 is heard. Further, the engagement between the annular flange 57 and the discontinuous portion 33 can be visually confirmed through the opening 34.

It is desirable that the relative movement between the syringe 10 and the protective cylinder 30 can be performed by one-handed operation. That is, the two fingers 121 are put on the finger contact portion 8, the thumb 120 is put on the finger pressing flange 101, and the syringe 10 is held. As shown in FIGS. The protection cylinder 30 can be moved forward and backward by pushing the contact portion 8 and the finger pressing flange 101.

This allows the user to use another hand to hold the patient's skin around the point to be injected.

The narrowed end portion 40 of the protective tube is sufficiently narrow so that a finger is not inserted into the through hole 31 and the tip of the injection needle is erroneously inadvertently stabbed. However, furthermore, the protective cap attached to the injection needle is inserted in the through-hole 31 in the reverse direction, and the end portion 40 is inserted.
Can be further narrowed.

When the syringe is to be discarded, as shown in FIG.
Can be left in the protective cylinder 30, removed from the syringe 10, and discarded. Further, the outer surface of the nozzle 13 is damaged by the barbs 54, and the syringe 10 cannot be reused.

FIGS. 27 and 28 show a lock member 200 different from the lock member 50 shown in FIGS. Like the lock member 50, the lock member 200 is also made of a synthetic resin material. The locking member 200 includes a cylindrical body portion 201 and an annular flange 202.
The outer shape of the annular flange 202 is slightly larger than both the outer diameter of the body 11 and the distance between diametrically spaced splines. Further, it is desirable that the height of the lock member indicated by the arrow 203 is smaller than the distance between the splines 32 that are opposed on the diameter.

The locking member 200 also has a central hole 204 formed by a continuous tapered wall 205 that matches the taper of the nozzle 13 of the syringe 10. When using, wall 2
05 and the outer surface of the nozzle 13 are engaged by friction.

The central through-hole 204 communicates with a central concave portion 206 formed by a continuous side wall 207. The recess 206 is formed with an upper peripheral edge 208 inclined downward and inward, and two diametrically opposed lamps 209 extending downward from the upper peripheral edge 208 and extending outward from the wall 207. Each ramp 209 has a lower guide surface 210 and a lower or terminal edge 211 near a horizontally disposed flange 212 having a lower abutment surface 213.

The concave portion 206 is also formed with two vertical contact portions 214 extending downward from the end edge portion 211 of the lamp. Two lamps 215 diametrically opposed and extending upward and inward from the floor 220 and extending outward from the wall 207 are formed at symmetric positions in the concave portion 206. Each lamp 215 is connected to an adjacent lamp 20.
9 and a tip 217 90 ° above the other tip 218 and the other lamp 20.
9 and a rear end portion 219 substantially below the front end portion 218.
have.

In the lock member 200, two vertical contact portions 250 extending in the vertical direction are formed on the outer surface of the side wall 201 at opposing positions.

In use, the user can detachably attach the injection needle 14 directly to the lock member 200. To do this, the flange 5 of the hub 17 is first placed in the recess 206 so that the end 6 of the flange comes between the opposing ramps 209 and rides on the tip 217 of the ramp 215. At this time, a part of the side wall 207 holding the end portion 6 lightly is slightly pushed away. Next, the hub 17 is rotated by about 90 °, and the end 6 is brought into contact with the guide surfaces 210, 216.
, The end 4 of the hub 17 abuts against the abutment 214, the flange 212 overlaps the end 6, and the surface 213 abutting the end 6 is, as described above, the nozzle 13 of the syringe. The hub 17 is held. The contact between the contact portion 250 and each rib 43 prevents rotation of the lock member 200 with respect to the protective cylinder 30 and / or the syringe 10 when fixing the injection needle.

When the hub 17 of the injection needle is rotated with respect to the lock member 200 in a direction opposite to the direction at the time of attachment, the injection needle 14 can be easily removed from the lock member 200.

While the protective cap attached to the injection needle 14 is attached, the injection needle 14 is
00 can be removed.

The use of the lock member 200 is particularly advantageous when a thick injection needle 14 is used to break through the seal of the container and aspirate the drug solution in the container. When injecting into a patient's skin, the needle can be replaced with a thin needle 14 as needed.

FIG. 29 shows a typical syringe 310 made of a transparent synthetic resin. Syringe 310 has a cylindrical body 311 that communicates with a frustoconical external nozzle 313 having a narrow outlet at one end. The outer surface of nozzle 313 has a taper, which is commonly referred to as a Luer taper.

The nozzle 313 is surrounded by a cylindrical wall 314 having a screw portion 315 inside.

Syringe 310 also includes a head 3 that slides inside the body 311 in a sealed state.
17 having a body 311 by means of the piston 316.
The injection solution inside is pushed out from the nozzle 313.

FIG. 31 shows an injection needle 320 that can be selectively attached to and detached from the nozzle 313. Injection needle 3
20 has a generally conical hub 321 surrounding a proximal end 322 of a tubular needle 323 having a pointed tip 324.

The hub 321 has a generally conical recess 325 in which the nozzle 313 frictionally engages, and an annular flange 326 that is screwed into a thread 315 in the cylindrical wall 314.

The syringe 310 and the injection needle 320 are usually separately packaged, and the tip 3 of the injection needle 320 is
24 is protected by a removable cap (not shown).

Until now, it has been required that the injection needle 314 be securely held by the nozzle 313 of the syringe 310 during injection.

FIGS. 35 to 38 show a substantially cylindrical protective tube 330 to be attached to the body 311 of the syringe 310. It is desirable that the protective cylinder 330 be made of a transparent synthetic resin material that can be elastically deformed such as high-density polypropylene.

The protection cylinder 330 has a through hole 331 whose both ends are open. The through-hole 331 has a main portion that is slightly larger than the outer diameter of the body 311 of the syringe 310, that is, a main body portion 344.

The through hole 331 is provided with two pairs of splines 332 extending in parallel along most of the longitudinal direction of the main body portion 344, and the splines of each pair are arranged at equal intervals. Furthermore, the two splines 332 that make up the pair of splines 332 are arranged close to each other, and the width occupied by the paired splines 332 is smaller than the distance between the pair between the splines 332. I have. As a result, the wall portion 345 between the two pairs of splines 332 can be easily deformed. Further, it is desirable that the distance between the pair of splines 332 at the symmetrical position in the diameter direction is slightly larger than the outer diameter of the body 311 of the syringe 310.

Each spline 332 breaks in the middle of the longitudinal direction to form a discontinuous portion 333,
In alignment, the break forms an annular internal groove 333a. A discontinuity 333 in each spline 332 communicates with an aligned opening 334 in the side wall 335 of the protective sleeve.

The opening 334 is surrounded by two annular ribs 336 and 337 extending to the outside, and a shallow recess 338 is provided at a position of each spline 332 facing each annular rib 336 and 337.
, 339 are formed.

The protection cylinder 330 has a cylindrical end 340 having an inner diameter smaller than the other end 341 and an inner diameter smaller than the outer diameter of the body 311. Four ribs 342 are arranged at equal intervals inside the end portion 340, and these ribs are used to reinforce the end portion and at the same time to eight ribs 343 extending vertically in a small portion of the main body 344 of the protective cylinder. Adjacent.

The protective cylinder 330 is desirably manufactured by injection molding.
It is desirable to have two blocks that form a molding space that matches the external shape of the. The molding device is installed in the molding space between the assembled blocks,
It has a cylindrical core that matches the shape of the 0 through hole. The discontinuous portions 333 communicating with the respective openings 334 are formed by protrusions provided respectively in the blocks on one side, and these are engaged with the core. Molten resin is supplied to the inside of the molding apparatus through a resin flow path communicating with one of the blocks to form a protective cylinder, and when the resin material is solidified, the molded protective cylinder 330 is separated from the core. The recesses 338 and 339 are
The ribs 336 and 337 are formed because the resin material forming the ribs 336 and 337 has a lower cooling rate than other thin portions.

FIGS. 32 and 33 show a lock member 350 made of a synthetic resin material. The lock member 350 has a main body 351 having an axial through hole 352.

The locking member 350 also has a frustoconical connection 353 located in the axial direction,
The outer surface has a continuous tapered side wall 354 (luer taper). Connection part 3
53 is surrounded by a cylindrical wall 355 having an internal thread 356.

The locking member 350 also has an outwardly facing annular end 357 having a skirt 358.
And the skirt is biased in the direction of the retaining means 359 which engages the nozzle 313 of the syringe 310 and the cylindrical wall 314 surrounding it. The holding means 359
It has a truncated frusto-conical portion 360 located in the downward axial direction, wherein the frusto-conical portion 360 is formed with a tapered outer continuous sidewall 361 and a tapered inner continuous sidewall 362 (luer taper).

The lock member 350 has eight concave portions 363 arranged at equal intervals in the circumferential direction on the upper surface of the annular end portion 357. Each recess 363 receives an end 364 of a rib 343.

As shown in FIG. 39, the protective cylinder 330 and the lock member 350 are assembled and provided in a form that can be used immediately by a user as the injection needle protection device 370, and can be selectively inserted into the syringe 310 before the injection needle 320 is attached. Can be installed. The locking member 350 is inserted into the center hole 331 with the connecting portion 353 facing forward, so that the connecting portion 353 faces the reduced-diameter end of the protective cylinder 330. Due to the resiliency of the edge 357, the locking member can be pushed over the entire length of the protective tube using a suitable tool, so that the end 364 of each rib 343 enters each concave portion 363, and the locking member 350 moves the protective tube 330. Held within. The narrow annular band of the edge 357 frictionally engages the spline 332 to retain the locking member 350 in the protective sleeve 330.

In use, the body 311 of the syringe 310 is inserted into the central hole 331 from the nozzle into the syringe needle protection device 370 assembled as described above, and the protection device 370 is inserted into the syringe 3.
10 is attached. The nozzle 313 enters the center hole 352 of the lock member 350,
The tapered surface (luer taper) of the nozzle 313 frictionally engages the inner surface of the tapered wall 362 of the conical portion 360 of the locking member in a wedge-shaped space between the threaded portion 315 of the cylindrical wall 314 and the tapered surface of the nozzle 313.

The upper portion 366 of the cylindrical wall 314 also frictionally engages the skirt 358 of the edge 357,
As shown in FIG. 34, the skirt extends outwardly on top of the top 366.

Further, with the center hole of the nozzle 313 sealed, the connection portion 3
It communicates with a center hole 352 that extends through 53.

The annular flange 326 of the hub 321 of the injection needle 320 is screwed into the threaded portion 356 of the lock member 350, and the hub 321 is sealed with the connecting portion 353 as shown in FIGS. Will be retained.

A syringe equipped with an injection needle is indicated by reference numeral 390 in FIG. 40, and when injecting a patient, the torso is filled with an injection solution in a usual manner. In the figure, the protection barrel 330 is in the inoperative position, and most of the injection needle 323 including the tip 324 is exposed.

When the tip 324 of the injection needle 313 is pierced into the patient's skin and the piston 316 is pushed in the direction of the nozzle 313, the injection solution in the body is injected into the patient. Also, this assembly 3
90 can be used to aspirate a patient's bodily fluid by pulling piston 316 away from nozzle 313.

When the injection or the suction of the bodily fluid is completed, the protection tube 330 is advanced along the body 311 and the tip of the end portion 340 of the protection tube is brought into contact with the skin of the patient. The torso is then pulled with one hand away from the end 340 and the tip 320 of the needle 319 is withdrawn from the patient's skin, and the other hand desirably holds the ribs 336 and 337 as a grip, Should not move.

The frictional engagement between the annular edge 357 and the spline 332 causes local deformation when the protective cylinder 330 moves with respect to the body 311, but a part of the resistance to the movement is caused by the wall 345. Can be handled by elasticity.

When the annular edge 357 reaches the position of the recess 338 in the body, the flange 357 engages the recess 338 and emits a sound to indicate that the engagement has occurred. Since the recess is relatively shallow and the edge 357 and the recess 338 are easily disengaged, the user advances the distal end of the protective tube to a position beyond the distal end 324 of the injection needle, and performs the next injection or liquid suction. You can wait until. This means that, for example, when injecting a small amount of a drug solution into a patient in the course of medical treatment, the protection device 390 temporarily changes the tip 324 of the injection needle with the tip portion 340 of the protection cylinder when not using a syringe. It is desirable to protect.

However, when the syringe 310 is not to be reused, as shown in FIG. 41, the protection barrel 330 is held in the operating position where the annular edge 357 enters the discontinuity 333, and the opposite end of each spline 332 is held. 375 impedes the movement of the annular edge 357. When the annular edge 357 is engaged with the discontinuous portion, a sound indicating the engagement is output. Further, the annular edge portion 357 can be visually confirmed through the opening 334, and this serves as a visual confirmation means that the annular edge portion 357 is held by the discontinuous portion 333.

Since the opening of the reduced-diameter end portion 340 of the protective cylinder is sufficiently narrow, it is possible to prevent the injection needle from being inserted mainly by inserting a finger into the opening 331. However, in addition to this, the user inserts the cap attached to the injection needle in the opposite direction into the center hole 331 so that the thicker proximal end of the cap further narrows the opening of the distal end 340. can do.

When the lock member 350 is removed from the syringe 310, the lock member 350 and the injection needle 320 are held in the protective cylinder 330.

What has been described above is an explanation for introducing an example of the present invention. Modifications and changes will be obvious to those skilled in the art and belong to the scope of the present invention defined in the claims.

[Brief description of the drawings]

FIG. 1 is a side view of an exemplary syringe.

FIG. 2 is a side view of a representative injection needle. FIG. 2a is an end view of the hub of the injection needle shown in FIG.

FIG. 3 is a side view of the syringe shown in FIG. 1 equipped with the injection needle shown in FIG. 2;

FIG. 4 is a side view of the protection cylinder of the present invention.

FIG. 5 is one end view of the protection cylinder shown in FIG. 4;

6 is another end view of the protection cylinder shown in FIG. FIG. 6a is a perspective view of one end of the protection cylinder shown in FIG.

FIG. 7 is a side sectional view of the protection cylinder shown in FIG.

FIG. 8 is a plan view of a lock member manufactured according to the present invention.

9 is a side sectional view of the lock member shown in FIG.

FIG. 10 is a side sectional view of the injection needle protection cylinder shown in FIG.

11 is a side cross-sectional view of the syringe needle protection barrel of FIG. 4 attached to the syringe shown in FIG. 3, with the protection barrel in a non-operative position.

12 is a side cross-sectional view of the syringe needle protection barrel of FIG. 4 attached to the syringe shown in FIG. 3, with the protection barrel in a shielding action position.

FIG. 13 is a side view showing a situation where the protective cylinder of FIG. 4 is mounted on a syringe.

FIG. 14a is a side view of the protection barrel of FIG. 4 mounted on a syringe, and FIG. 14b is an end view thereof.

FIG. 15 is a side view showing a situation in which an injection needle is attached to a syringe equipped with the protective cylinder of FIG.

FIG. 16 is a side view of the syringe to which the injection needle is attached.

FIG. 17 is a side view of the syringe with the cap removed.

FIG. 18 is a side view of the syringe to which the injection needle is attached.

FIG. 19 is a side view of the syringe in which the protective cylinder of FIG. 4 has been advanced to the shielding action position.

FIG. 20 is a side view of the syringe in which the protective cylinder of FIG. 4 has been retracted to a non-operating position.

FIG. 21 shows a state before use of the syringe in the state of FIG. 20;

FIG. 22 shows an injection liquid extruded state.

FIG. 23 shows a state after injection liquid extrusion.

FIG. 24 shows a situation in which the protective cylinder is pushed out to the operating position.

FIG. 25 is a side view showing a lock member held at a discontinuous portion in the protective cylinder.

FIG. 26 is a side view showing a state in which the protective cylinder incorporating the injection needle has been removed from the syringe.

FIG. 27 is a plan view of another form of a lock member manufactured according to the present invention.

FIG. 28 is a side sectional view of the lock member of FIG. 27;

FIG. 29 is a side view of another syringe.

30 is a side sectional view of a nozzle portion of the syringe of FIG. 29.

FIG. 31 is a side view of an exemplary injection needle.

FIG. 32 is a side sectional view of a lock member manufactured according to the present invention.

FIG. 33 is a plan view of the lock member of FIG. 32.

FIG. 34 is a side sectional view of a lock member attached to the tip of the syringe.

FIG. 35 is a side sectional view of a protective cylinder manufactured according to the present invention.

FIG. 36 is one end view of the protection cylinder of FIG. 35;

FIG. 37 is another end view of the protection cylinder of FIG. 35.

FIG. 38 is a side sectional view of the protection cylinder of FIG. 35.

FIG. 39 is a side sectional view of an injection needle protection device manufactured according to the present invention.

40 is a side cross-sectional view of the syringe in the non-operative position of FIG. 29 with the needle protection device of FIG. 39 mounted.

FIG. 41 is a side sectional view of the syringe shown in FIG. 29 in which the protective cylinder of FIG. 39 has been advanced to the shielding action position.

[Procedural Amendment] Submission of translation of Article 34 Amendment of the Patent Cooperation Treaty

[Submission date] March 24, 2000 (2000.3.24)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

──────────────────────────────────────────────────続 き Continued on the front page (31) Priority claim number PP 6791 (32) Priority date October 28, 1998 (1998.10.28) (33) Priority claim country Australia (AU) (31) Priority Claim number PP 7979 (32) Priority date December 31, 1998 (December 31, 1998) (33) Priority claiming country Australia (AU) (31) Priority claim number PP 7980 (32) Priority date Heisei 31 December 1998 (31 December 1998) (33) Priority claiming country Australia (AU) (31) Priority claim number PP8332 (32) Priority date January 25, 1999 (1999. 25) (33) Priority claim country Australia (AU) (31) Priority claim number PP 8333 (32) Priority date January 25, 1999 (1999.1.125) (33) Priority claim country Australia ( AU) (81) Designated countries EP (AT, B , CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE), OA (BF, BJ, CF, CG, CI, CM, GA , GN, GW, ML, MR, NE, SN, TD, TG), AP (GH, GM, KE, LS, MW, SD, SL, SZ, UG, ZW), EA (AM, AZ, BY) , KG, KZ, MD, RU, TJ, TM), AE, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT , LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, R U, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, US, UZ, VN, YU, ZA, ZW

Claims (23)

[Claims] The present invention has a through-hole into which a barrel of a syringe is inserted. In the through-hole, a discontinuous portion into which a syringe is incorporated and an outer peripheral portion of a lock member extending outward from the barrel of the syringe is engaged. An injection needle protection device including a protection cylinder having a spline or rib formed therein. 2. A syringe having a through hole into which a barrel of a syringe is inserted, and a spline or rib extending over the entire length of the through hole is formed in the through hole. An injection needle protection device comprising: a protection tube provided with a discontinuous portion which is engaged with an outer peripheral portion of a lock member extending outward from the portion, and the discontinuous portion is formed at a position coinciding with a side wall opening of the protection tube. 3. The injection needle protection device according to claim 2, wherein the discontinuous portion is formed by a member that is pulled out of the opening during a molding process. 4. A plurality of splines spaced apart in a circumferential direction inside the protection cylinder, and a discontinuous portion is formed in each spline, and the discontinuous portions are aligned on a side surface. Or the injection needle protection device according to 3. 5. The protection member according to claim 1, wherein the spline engages with the lock member by friction, and sliding resistance when the lock member slides along the protection cylinder is reduced by at least partial deformation of the protection cylinder. The injection needle protection device according to any one of claims 1 to 4. 6. The needle protection device according to claim 4, wherein at least some of the splines are separated by an elastically deformable wall portion of the protection tube. 7. The injection needle protection device according to claim 1, wherein the protection tube is made of an elastically deformable synthetic resin material. 8. A through-hole for inserting a barrel of a syringe, and a spline is formed in at least a part of the protective cylinder in the through-hole. The spline has a discontinuous portion, and the spline has a discontinuous portion. A method of manufacturing a protective cylinder of a type in which an outer peripheral portion of a lock member incorporated in a syringe is engaged with a continuous portion, wherein a contact surface having a molded concave portion that matches an external shape of the protective cylinder to be manufactured is formed. Prepare two blocks that form a discontinuous part with a projection that protrudes from one of the molded recesses. Prepare a core that has a groove that matches the internal shape of the protective cylinder to be manufactured and that matches the shape of the spline. Then, a molding space is formed by the two molding recesses, and the core is supported in the molding space, and the two blocks are joined together so that the free ends of the protrusions engage with the grooves. A resin flow path that connects and communicates with the molding space Through molten synthetic resin material is injected into the molding space, the separation of the two blocks, and a manufacturing method of the needle protection device including the steps of the synthetic resin protective sleeve is separated from the core. 9. A through-hole for inserting a barrel portion of a syringe, in which a spline is formed along at least a part of the protective cylinder, the spline having a discontinuous portion, and A method for manufacturing a protective cylinder of a type in which an outer peripheral portion of a lock member incorporated in a syringe is engaged with a continuous portion, the method including a contact surface having a molded concave portion that matches the external shape of the protective cylinder to be manufactured. Providing two blocks, a core having a groove that matches the internal shape of the protective cylinder to be manufactured and the shape of the spline, and a pin that enters the groove to form a discontinuity of the spline is prepared. A molding space is formed by the two molding recesses, and the core is supported in the molding space, and the two blocks are joined together by abutting surfaces so that the pin separates a part of the groove. Melting through communicating resin flow path Forming a resin material is injected into the molding space, the two blocks were separated, disconnect catching pin and method of manufacturing the needle protection device including the steps of separating the synthetic resin protective sleeve from the core. 10. A syringe needle protection device having a cylindrical side wall and a reduced-diameter end portion communicating with a nozzle, the syringe needle protection device being mounted in an assembled state on a syringe of a type in which a syringe needle is mounted on the nozzle. It is movable between an inoperative position in which the tip of the injection needle is exposed to the patient's skin by exposing the tip of the injection needle and an active position in which the tip of the injection needle is protected. Has a discontinuous part in the middle of the sleeve, and the discontinuous part is formed at a position corresponding to the side wall opening of the protective cylinder. The sleeve-like protective cylinder is movably inserted into the protective cylinder and attached to the protective cylinder. For the mounting member, the mounting member has an edge that serves to hold the protective cylinder in the operating position,
An injection needle protection device comprising: a lock member having an edge protruding outward from a side wall of a protection cylinder; and holding means provided inside the protection cylinder and holding the lock member to a syringe. 11. The injection needle protection device according to claim 10, wherein the discontinuous portion is formed in a molding process by a member pulled out from the opening. 12. The protection cylinder is provided at one end thereof with positioning means for holding the lock member in the process of incorporating the lock member into the syringe.
The injection needle protection device according to any one of claims 1 to 10. 13. The injection needle protection device according to claim 12, wherein the positioning means has a plurality of abutting portions and abuts on an end of the lock member. 14. The injection needle protection device according to claim 10, wherein the lock member has an opening through which a nozzle of the syringe enters. 15. The injection needle protection device according to claim 14, wherein the lock member has fixing means for fixing a hub of the injection needle. 16. The injection needle protection device according to claim 10, wherein the lock member has a holding means that engages with an adjacent portion of the syringe. 17. Preparing the assembled needle protection device, inserting the barrel of the syringe into the protection tube to engage the syringe with the holding means;
A mounting method for the injection needle protection device according to any one of claims 10 to 16. 18. A locking member incorporated in the syringe, wherein the locking member is attached to the syringe, a lateral projection extending outside the body of the syringe, mounting means for attaching the locking member to the syringe, separation from the syringe. And a locking means for fixing the hub of the injection needle which communicates with the nozzle of the syringe when mounted on the locking member. 19. Use of the injection needle protection device according to any one of claims 1 to 7 or 10 to 17, for shielding an injection needle attached to a syringe to prevent an injury due to the injection needle. A method comprising the steps of: moving a protective sleeve relative to a syringe needle and engaging and retaining a locking member with a discontinuous portion of the protective sleeve in an operative position surrounding the tip of the syringe needle with the protective sleeve. How to use the needle protection device. 20. A needle protection device comprising: a tubular body having at one end a narrow outlet communicating with a nozzle for selectively mounting a syringe needle; and a finger rest attached to the other end of the tubular body and a piston. A non-operating position that can be attached to the barrel of the syringe and that exposes the tip of the injection needle, and a tubular protection tube that can move between an operation position in which the tip of the injection needle is surrounded by the free end of the protection tube. The user holds the syringe by touching two fingers of one hand to the finger support member, and performs the operation of moving the protective cylinder between the non-operation position and the operation position with the thumb of the same hand. Needle protection device having a finger contact means. 21. A needle protection device having a tubular body having at one end a narrow outlet communicating with a nozzle for mounting a syringe needle, wherein a finger contact member is mounted on a syringe provided on the other end of the body and a piston. A method of using a device to prevent injuries due to a needle, wherein the user holds the syringe with two fingers of one hand against a finger rest, a thumb on the same hand against the connecting member, and 21. The method of using the injection needle protection device according to claim 20, wherein the operation of pressing the protective cylinder against the syringe so as to surround the tip of the injection needle includes a step of performing the operation with a thumb and two fingers applied to a finger support member. . 22. An injection needle protection device described with reference to the drawings. 23. A locking member described with reference to the drawings.