JPH09262294A - Syringe, needle and container for disposing of needle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an infusion cartridge to be attachable and detachable, to eliminate work such as screwing/unscrewing of a double-ended needle, and to greatly facilitate attachment and detachment of a syringe needle. SOLUTION: The syringe is provided with a part for containing an infusion cartridge, a plunger for pushing a gasket in the infusion cartridge and a part 5 for attaching a needle. The part 5 is equipped with a hub holder 6 for holding the hub of a needle, moving a member 7 movable to the rear end side of the syringe, and a hub loading/unloading mechanism (needle attaching/detaching mechanism) which releases the needle hub from the hub holder 6 with the member 7 moves to the rear end side of the syringe and which makes the needle hub capable of being held by the hub holder 6 when the member 7 is positioned on the tip end side of the syringe.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a syringe for accommodating a drug solution cartridge, for example, a dental syringe and an injection needle having a double-ended needle used therein, and a waste container thereof.

[0002]

2. Description of the Related Art Conventionally, for dentistry and the like, a reusable syringe has been used, which is capable of mounting and dismounting a drug solution cartridge and is made of a sterilizable material such as metal. An injection needle hub mounting portion is formed on the distal end portion of the syringe, and the mounting portion usually has a thread. The injection needle used in such a syringe is a hollow needle (double-ended needle) having blade surfaces at the front and rear ends, and an injection needle hub that is fixed to the middle part and has an open rear end. ing. A thread groove is formed on the inner surface of the rear end of the hub of the injection needle so as to be screwed into the screw thread of the injection needle mounting portion of the injection needle, and the injection needle is fixed to the injection syringe by both screwing. A drug solution cartridge to be attached to a syringe is provided with a closing member on the tip side that can be pierced by the rear end side blade of an injection needle and a gasket that can slide on the back end side, and a drug solution, for example, dental anesthesia, inside. It is filled with agent. The syringe includes a plunger for pressing the gasket of the liquid medicine cartridge.

[0003]

The attachment of the injection needle described above requires rotation of the injection needle hub, and the syringe is reused. Therefore, after use, the injection needle must be removed. I won't. Even during the removal work, it is necessary to rotate the injection needle hub, and the work is not easy. If careless work is performed at this time, there is a risk of accidentally sticking the finger. Also, in dentistry, since injection is performed in a narrow area such as the oral cavity, it is often the case that the needle of the injection needle is intentionally bent or bent, and it is difficult to return the bent needle to its original shape. The injection needle is often replaced during the use of one drug solution cartridge. Even at this time, with the injection needle mounting system by screwing,
Replacing the injection needle was not easy.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is a reusable syringe capable of mounting and dismounting a liquid medicine cartridge, such as screwing and unscrewing an injection needle having a double-ended needle. (EN) Provided are a syringe in which an injection needle can be attached and detached very easily without any work, an injection needle used in the syringe, and an injection needle disposal container in which the injection needle can be detached and stored safely and easily.

What achieves the above-mentioned object is to include a drug solution cartridge housing portion, a plunger for pushing a gasket in the drug solution cartridge, an injection needle mounting portion, and a hub and a puncture needle portion formed on the distal end side. A syringe capable of mounting an injection needle comprising a hollow needle having a cartridge piercing needle portion formed on a rear end side and a hub fixed to an intermediate portion of the hollow needle, wherein the injection needle attaching portion is an injection needle. A hub holding portion that holds the needle hub, a moving member that can move to the rear end side of the syringe,
When the moving member moves to the rear end side of the syringe, the holding of the injection needle hub by the hub holding portion is released, and when the moving member is located at the distal end side of the syringe, the hub holding portion can hold the injection needle hub. It is a syringe provided with the hub attaching / detaching mechanism.

The moving member accommodates the hub holding portion, and further has a spring member, which is compressed by the moving member and the hub holding portion, in the moving member. It is preferable. Further, the hub holding portion is provided with a hub holding member having a plurality of hub holding claws, and is integrally formed with the hub holding member or fixed to the hub holding member, and a guide passage through which a cartridge piercing needle portion of an injection needle can be inserted. It is preferable to have a forming member. Further, the moving member has an outer cylinder member and an inner cylinder member provided coaxially with the outer cylinder member, and the inner cylinder member penetrates into the hub when the injection needle is attached and the injection member is attached. It is preferable to have an intrudable portion in the hub for suppressing rattling of the hub of the needle and a cartridge pressing portion extending to the rear end side. Further, the hub holding claw, by moving the moving member to the rear end side of the syringe,
It is preferable that it is deformable so that it can be pushed outward. Further, the injection needle hub has a flange formed at a rear end portion thereof, and the hub holding claw is formed at a hub guiding inclined portion formed at a distal end portion thereof, and is formed behind the inclined portion, It is preferable to have a flange engagement part which engages with a flange of a hub. And, the injection needle mounting portion,
It is preferable to have an injection needle rotation suppressing portion that contacts the injection needle hub when the injection needle is attached and that suppresses rotation of the injection needle. Further, the injection needle rotation suppressing portion is formed on a surface of a flat plate portion that is formed so as to be substantially orthogonal to the axis of the moving member and at a position that can contact the injection needle hub when the injection needle is attached. A rib is preferably engageable with the rear end of the needle hub. Then, the hub holding portion is, for example,
A plurality of hub holding members having a hub holding claw on the tip side,
A hub holding member support member having a guide passage through which the cartridge piercing needle portion can be inserted and rotatably supporting or holding a rear end portion of the hub holding member, the hub holding member support member, and the hub holding member. And an elastic member that is compressed by a member and urges the hub holding member in a direction capable of holding the hub. Further, when the moving member moves to the rear end side of the syringe, the elastic member for urging the hub holding member is compressed, and the hub holding member moves the hub in the direction in which the holding of the injection needle hub is released. It rotates with respect to the holding member support member.

Further, what achieves the above-mentioned object is an injection comprising a hollow needle having blade surfaces formed at the tip and the rear end, and an injection needle hub fixed to the middle portion of the hollow needle and having the rear end side opened. The hub is an injection needle including a hub rotation suppressing portion on the hub side, which is in contact with an injection needle rotation suppressing portion formed on an injection needle mounting portion of a syringe to which the injection needle is attached.

Further, what achieves the above-mentioned object is an injection needle to be attached to the above-mentioned syringe, wherein the injection needle has a hollow needle having a blade surface at a front end and a rear end, and the hollow needle. A hub fixed to an intermediate portion of the needle and having an opening on the rear end side, wherein the hub is a hub hub engaging with a needle rotation restraining portion formed on a needle mounting portion of the syringe. It is an injection needle provided with a rotation suppressing part. The hub rotation suppressing portion on the hub side is preferably a groove portion formed at the rear end portion of the hub and engageable with the rib.
The inner surface of the hub preferably has a thread groove.

Further, what achieves the above object is an injection needle waste container for the above-mentioned syringe, wherein the waste container comprises a waste container body and a cylindrical shape provided on an upper surface of the waste container body. Of the injection needle detaching member, and the detaching member is formed below the guide portion for guiding the injection needle attaching portion of the syringe in the detaching member, and is formed below the guide portion. At least the inner space capable of accommodating the distal end portion and the inner surface of the detaching member forming the inner space are protruded inward, and without substantially contacting the hub holding portion,
In addition, the injection needle disposal container has a rib that prevents passage of the moving member.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An injector and an injection needle of the present invention will be described with reference to the embodiments shown in the drawings. FIG.
It is a top view which attached the injection needle. FIG. 2 is an enlarged cross-sectional view of the tip of the syringe of the present invention with an injection needle attached. FIG. 3 is a plan view of a hub holding member that constitutes the injection needle mounting portion of the syringe shown in FIG. 2, and FIG. 4 is a front view of the hub holding member shown in FIG. FIG. 5 is a plan view of a moving member forming the injection needle mounting portion of the syringe shown in FIG. 2, and FIG. 6 is a sectional view taken along the line AA of the moving member shown in FIG.

The syringe 1 comprises a drug solution cartridge storage portion 3, a plunger 4 for pushing a gasket in the drug solution cartridge, and an injection needle mounting portion 5. The needle mounting portion 5 includes a hub holding portion 6 that holds the needle hub, a moving member 7 that can move to the rear end side of the syringe, and a hub holding portion 6 when the moving member 7 moves to the rear end side of the syringe 1. The hub attaching / detaching mechanism (injection needle attaching / detaching mechanism) that enables the holding of the injection needle hub by the hub holding portion 6 when the holding of the injection needle hub is released and the moving member 7 is located on the distal end side of the syringe. The injection needle 2 includes a hollow needle 21 having blade surfaces formed at the front and rear ends.
And an injection needle hub 22 that is fixed to the middle portion of the hollow needle 21 and is open at the rear end side.

As shown in FIG. 1, a syringe 1 includes a syringe body 11 having a drug solution cartridge storage portion 3, a plunger 4 for pushing a gasket 91 in a drug solution cartridge 9, and a plunger 4 at the rear end of the plunger 4. It has a fixed plunger pressing part 12, a gripping part 13 provided at the rear end of the syringe body 11 for hanging a finger, and an injection needle mounting part 5. In the state shown in FIG. 1, the tip portion of the plunger 4 has entered the chemical liquid cartridge 9 and is in contact with the gasket 91. By lowering the plunger 4 rearward, the chemical liquid cartridge can be detached from the storage portion 3.

Next, the injection needle attaching portion and the injection needle attaching / detaching mechanism of the syringe of the present invention will be specifically described with reference to the drawings.
The injection needle mounting portion 5 has a structure as shown in FIG.
Note that FIG. 2 shows a state in which the injection needle is attached to the injection needle attachment portion 5. In the state where the injection needle 2 is attached to the syringe 1 in which the drug solution cartridge 9 is attached, as shown in FIG. 2, the hollow needle 21 of the injection needle 2 has a rear end side blade edge 21c.
Can pierce the sealing member 92 that closes the tip of the cartridge 9 to discharge the liquid medicine in the cartridge. The needle mounting portion 5 of this syringe is a hub 22 of the needle.
It can be attached without screwing and can be easily removed. One-touch attachment and detachment of the injection needle to the so-called syringe (one-touch detachment) is possible. The injection needle mounting portion 5 includes a hub holding portion 6 that holds an injection needle hub, and a moving member 7 that can move to the rear end side of the syringe.

The hub holding portion 6 has a shape as shown in FIGS. 4 and 3, and is a tubular shape for the hub holding member 60 having the hub holding claw 62 and the cartridge needle piercing portion 21b of the injection needle. The guide path forming member 61 of FIG. It should be noted that it may be created in advance as an integrated body.

As shown in FIGS. 4 and 3, the hub holding member 60 has a cylindrical portion 65 and a plurality (specifically, three) provided on the peripheral portion of the upper surface of the cylindrical portion 65 at equal angular intervals. Of the hub holding claw 62, the claw 62 is formed from the top on the hub guiding inclined portion 62b, the flange engaging portion 62a formed on the end portion of the inclined portion 62b, and engaging with the flange 23 of the hub 22. An inward projecting portion 62c provided to deform 62 so as to spread outward, and an inward projecting portion 62c.
A second inclined surface 62e formed in front of the claw 62 and a deformable portion 62d formed to facilitate the deformation of the claw 62 and the return after the deformation. A screw groove 66 is formed on the inner surface of the rear end of the cylindrical portion 65, and is screwed with the screw thread 11a formed on the outer surface of the front end of the main body 11 of the syringe.

The guide path forming member 61 is a hub holding member 60.
Disc-shaped portion 68 for fixing to the disc-shaped portion 68, a tubular portion 63 protruding from the central portion of the disc-shaped portion 68, and two cutout portions 67a formed near the base end of the tubular portion 63 of the disc-shaped portion 68. , 6
7b. A guide passage 61a for the cartridge piercing needle portion 21b of the injection needle is formed inside the tubular portion 63.

A moving member 7 which is movable to the rear end side of the syringe.
As shown in FIGS. 5 and 6, the outer tubular member 70 and the inner tubular member 7 concentrically fixed to the center of the outer tubular member 70.
Consists of one. The outer cylinder member 70 includes a flat plate portion 70a formed at a position slightly closer to the tip side than the center, and the flat plate portion 70a
The center of is open for insertion of the inner cylinder member 71,
Further, the peripheral portion of the flat plate portion 70a has a plurality (specifically, three) notches 74 formed at equal angular intervals. The cutout portion 74 is an opening for passing the above-described claw 62. The claw 62 and the notch 74 are
It may be two, or four or more. It is preferably three in terms of manufacturing advantages and strength.

The injection needle mounting portion 5 has an injection needle rotation suppressing portion for contacting the injection needle hub 22 when the injection needle is attached and suppressing rotation of the injection needle. Specifically, on the surface of the flat plate portion 70a in the vicinity of the central opening (a portion close to the inner cylinder member 71), a rib for preventing rotation of an injection needle that engages with a rotation preventing groove 24 of the injection needle hub 22 described later. Has 72. In this embodiment, four ribs 72 formed at equal angular intervals are formed. The rib 72 has a triangular cross section when cut perpendicularly to the longitudinal direction.
Although the number of ribs 72 may be one, it is preferable to provide a plurality of ribs 72 in order to more reliably prevent the hub from rotating, and it is preferable that the number of ribs be about 2 to 10. Particularly preferably,
It is 3 to 8. An annular recess 75 is formed on the back surface of the flat plate portion 70a near the central opening (a portion close to the inner tubular member 71), and in cooperation with the outer surface of the inner tubular member 71, an elastic member described later is formed. A storage portion for the end of the (spring member) 8 is formed.

The inner cylinder member 71 has a guide path forming member 6 inside.
A passage 71a for inserting the tubular portion 63 of No. 1 is provided, and a shoulder portion 71b for joining with the moving outer tubular member 70 is provided in the vicinity of the central portion, and a passage portion 71a is inserted into the hub 22 when the injection needle is attached. Intrudable portion 71 in the hub for suppressing rattling of the hub 22
c, and cartridge pressing portions 73a and 73b for pressing down the two cartridges extending to the rear end side. The cartridge pressing portions 73a and 73b have a substantially crescent-shaped cross section as shown by the broken line in FIG. The cartridge pressing portions 73a and 73b can move downward through the notches 67a and 67b shown in FIG. It should be noted that the cartridge pressing portion may be one, but by providing a plurality (two) as described above,
Makes it easy to move the cartridge. Invasion-possible part 7
1c is formed in a cylindrical shape, but may be in a polygonal cylinder shape. Further, the in-hub intrusion portion 71c has a size and a shape that can be inserted into the hub 22 so that both side surfaces are not engaged with each other.

As shown in FIG. 2, the needle mounting portion 5 of the syringe 1 is assembled by accommodating the elastic member (spring member) 8 and the hub holding portion 6 in the moving member 7 described above. There is. A spring member is used as the elastic member. As the spring member, a cylindrical member that substantially encloses the two cartridge pressing portions 73a and 73b of the moving member 7 is used. The elastic member is not limited to the spring member, and may be a rubber tube, for example. In addition, the three pawls 62 of the hub holding portion 6 are
Of the flat plate portion 70a. The moving member 7 and the hub holding portion 6 are urged by a spring member 8 interposed therebetween so as to expand the distance between them. However, when the injection needle is not attached, the nail 62
Since the engaging portion 62a of (1) abuts (engages) with the flat plate portion 70a of the moving member 7, the two are not separated. In other words, nail 6
The second engaging portion 62a engages with the flat plate portion 70a of the moving member 7, whereby the spring member is in a compressed state.

The cartridge piercing needle portion 2 of the injection needle
When 1b is inserted into the guide path 61a and pushed forward, the flange 23 of the hub 22 of the injection needle comes into contact with the inclined surface 62b of the claw 62. When pushed further, the flange 2 of the hub 22
3, the pawl 62 is deformed so as to spread outward, and when the flange 23 gets over the engaging portion 62a of the pawl 62, the pawl 62
Returns to the original state, and the injection needle is fixed to the injection needle attachment portion 5 as shown in FIG. In this state, the moving member 7 is slightly moved to the base end side before attaching the injection needle, and the flange of the injection needle hub is between the engaging portion 62a of the claw 62 and the flat plate portion 70a of the moving member 7. It is held by being pinched and narrowed by the repulsive force of the compressed spring member.

The injection needle 2 comprises a hollow needle 21 and a hub 22. The hollow needle 21 is a so-called double-ended needle having a puncture needle portion 21a for puncturing a patient on the front end side and a cartridge piercing needle portion 21b for piercing a closing member of the cartridge on the rear end side. As shown in FIGS. 7 and 8, the hub 22 has a hollow needle insertion passage 22a, a flange 23, and a large number of radially extending grooves 24 that are evenly formed in an annular shape on the rear end surface of the hub. A large number of grooves 24 formed in this annular shape
Engages with the injection needle rotation preventing rib 72 formed on the flat plate portion 70a of the moving member 7 described above, and suppresses the rotation of the injection needle. In addition, a thread groove 26 is formed on the inner surface of the side surface portion 25 of the hub 22 in order to enable attachment to a normal syringe by screwing, and the side surface portion 25 is used for screwing. In order to facilitate rotation, it is formed in a polygonal shape (specifically, an octagon) as shown by a broken line in FIG. The entire syringe 1 including the injection needle mounting portion 5 is formed of a durable material that can be sterilized by autoclave, for example, metal (specifically, stainless steel), hard and heat resistant resin, or the like.

The injection needle mounting portion 5 is provided with a hub holding portion 6
The thread groove 66 formed on the inner peripheral surface of the rear end of the syringe body 11
2 and FIG. 9 by screwing the thread 11a formed on the side surface of the tip end portion of the. FIG. 9 shows a state in which the injection needle 2 is detached from the syringe 1. The hub holding member 60 and the guide path forming member 61 fixed to the hub holding member 60 are immovable with respect to the syringe body 11. However, since the moving member 7 is not fixed to the syringe body 11 and the hub holding portion 6, the moving member 7 can be pushed toward the rear end of the syringe (in the direction of the arrow in FIG. 9) with a force capable of compressing the spring member 8. For example, the moving member 7 moves to the rear end side of the syringe. By the movement of the moving member 7 to the rear end side, the notch 74 formed in the flat plate portion 70a of the moving outer tubular member 70 moves rearward along the inner surface of the claw 62 of the hub holding member 60, and The claw 62 is gradually expanded outward by contacting an inner inner surface 74a of the cutout portion 74 with a second inclined surface 62e formed by gradually becoming thicker toward the rear end side, Then, the flat surface of the protruding portion 62c and the inner inner surface 74a of the cutout portion 74 are in contact with each other, the engaging portion 62a of the claw 62 and the flange of the hub 22 of the injection needle are not substantially in contact with each other, and the engagement therebetween is released. ing.
This state is the state shown in FIG.

The inner cylinder member 71 fixed to the moving outer cylinder member 70 also moves in the rear end direction. At this time, the cartridge pressing portion 73 formed at the rear end of the inner tubular member 71
a and 73b are notches 67a and 67 of the hub holding member 60.
After passing through b, it moves to the rear end side, contacts the front end surface of the cartridge 9, and pushes down the cartridge to the rear end side. The moving distance of the moving member 7 to the rear is A shown in FIG. 2 (the length by which the cartridge piercing needle portion 21b penetrates into the cartridge).
Since the length is longer, the tip surface of the sealing member 92 of the cartridge 9 has the cartridge piercing needle portion 2 of the injection needle.
It is on the rear end side of the blade edge 21c of 1b, and the cartridge piercing needle portion 21b of the injection needle does not substantially come into contact with the cartridge. As a result, the relationship between the injection needle 2 and the injection needle mounting portion 5 is that the distal end of the tubular member 61 of the hub holding portion 6 penetrates into the proximal end portion of the injection needle hub 22 and the cartridge needle piercing needle of the injection needle enters into it. Since the state where the portion 21b has entered and the state where only the tip of the hub enterable portion 71c has entered the rear end of the hub and the needle hub and the needle mounting portion are not engaged, the injection needle 2 can be easily detached from the injection needle mounting portion 5. Thus, with this syringe,
Releasing the engagement between the injection needle mounting portion 5 and the injection needle hub 22, and inserting the cartridge piercing needle portion 21 into the sealing member 92 of the cartridge.
Since the piercing state of b can be released at the same time, the injection needle can be removed from the syringe with a so-called one-touch operation.

Further, it is preferable to use a waste container 51 as shown in FIG. The waste container 51 includes a waste container body 52 and a tubular injection needle detaching member 53 provided on the upper surface of the waste container body 52. Release member 53
Is a tapered portion (guide portion) 54 provided in the vicinity of the upper end opening of the detaching member 53 to guide the injection needle mounting portion 5 of the injector 1 into the detaching member and which is reduced in diameter downward.
And an internal space 55 that is continuous with the tapered portion 54 and that can accommodate at least the distal end portion of the injection needle attachment portion 5, and an inwardly projecting inner surface of the detaching member 53 that forms the internal space 55, and holds the hub. Without substantially contacting the part 6,
It has an annular rib 56 that restricts passage of the moving member 7.
The inner diameter of the annular rib 56 is smaller than the outer diameter of the distal end portion (the distal end portion of the outer cylindrical portion of the moving member) of the injection needle mounting portion 5, and the hub holding claw 62 of the hub holding portion is substantially formed. It is formed so as not to contact. The injection needle attachment portion 5 of the syringe 1 inserted into the detachment member 53 contacts the rib 56,
When the syringe is further pushed downward in that state, as described above, only the moving member 7 of the injection needle mounting portion 5 maintains that state, and the other portions move below the waste container. Therefore, relatively, only the moving member 7 is in the same state as when it is moved to the rear of the syringe, the holding state of the injection needle 2 by the injection needle mounting portion 5 is released, and the gravity applied to the injection needle 2 and The injection needle 2 is detached from the syringe 1 and naturally drops downward due to vibration or the like when the injection needle attachment portion 5 is moved rearward. Therefore, by using such a waste container having a function of assisting the movement of the moving member 7 of the injection needle mounting portion 5, the detachment from the syringe 1 and the disposal can be performed at the same time without substantially touching the injection needle.

The waste container main body 52 is not limited to an integrated body, and may be formed of a housing and a lid member provided so as to close the opening of the housing and provided with the detaching member 53. Further, the ribs 56 may be scattered protrusions instead of an annular shape.

Next, a syringe according to another embodiment of the present invention will be described. The attached injection needle is the same as that described above. FIG. 11 is a plan view of the syringe of this embodiment with an injection needle attached. FIG. 12 is an enlarged partial sectional view of the distal end portion of the syringe with the injection needle attached. FIG. 13 is an explanatory diagram for explaining components of the injection needle mounting portion of the syringe. FIG. 14 is a plan view of a hub holding member support member including a holding mechanism that holds the hub holding member. FIG. 15 is a sectional view taken along line BB of FIG. FIG. 16 is a plan view of the hub holding member. 17 is shown in FIG.
6 is a sectional view taken along line CC of FIG. FIG. 18 is an explanatory view for explaining the action when the injection needle is detached from the syringe of this embodiment.

This syringe 100 is similar to the above-described embodiment in that as shown in FIG.
And a plunger 4 for pressing a gasket in the liquid medicine cartridge, and an injection needle mounting portion 5. The needle mounting portion 5 includes a hub holding portion 6 that holds the needle hub, a moving member 7 that can move to the rear end side of the syringe, and a hub holding portion 6 when the moving member 7 moves to the rear end side of the syringe 1. The hub attaching / detaching mechanism (injection needle attaching / detaching mechanism) that enables the holding of the injection needle hub by the hub holding portion 6 when the holding of the injection needle hub is released and the moving member 7 is located on the distal end side of the syringe. The difference between the syringe 100 and the above-described syringe 1 is only the difference in the hub holding mechanism, and the injection needle 2 is the same.
The same members are designated by the same reference numerals.

The needle mounting portion 5 has a structure as shown in FIGS. 12 and 13. Note that FIG. 12 shows a state in which the injection needle is attached to the injection needle attachment portion 5. In the state where the injection needle 2 is attached to the syringe 100 equipped with the drug solution cartridge 9, as shown in FIG.
The rear end side blade edge 21c of the hollow needle 21 is pierced with a sealing member 92 that closes the front end portion of the cartridge 9 so that the drug solution in the cartridge can be discharged.

The injection needle mounting portion 5 of this injector can be attached to the hub 22 of the injection needle without screwing, and can be easily detached. One-touch attachment and detachment of the injection needle to the so-called syringe (one-touch detachment) is possible. As shown in FIG. 13, the injection needle mounting portion 5 is
A hub holding portion 6 that holds the injection needle hub, a moving member 7 that can move to the rear end side of the syringe, and an elastic member (a spring member in this embodiment) 8 that is compressed between the two are provided.

The hub holding portion 6 has a structure as shown in FIG. As shown in FIGS. 13 and 12, the hub holding portion 6 includes a plurality of (specifically, three) hub holding members 162 each having a hub holding claw on the tip side, and the hub holding member 1.
A hub having a holding mechanism (in this embodiment, a holding groove 161a and a notch 161c) for rotatably holding the rear end portion 162e of the valve 62 and a guide passage 171 through which the cartridge piercing needle portion can be inserted. Holding member support member 161
And an elastic member 115 that is compressed by the support member 161 and the hub holding member 162 and biases the hub holding member 162 in a direction capable of holding the hub 22.

The hub holding member supporting member 161 is shown in FIG.
As shown in FIG. 13, FIG. 14 and FIG.
68 and a holding mechanism for a plurality (for example, 3 or 4) of hub holding members provided at equal angular intervals are formed on the disc-shaped portion 168. As shown in FIGS. 14 and 15, the hub holding member holding mechanism includes a flange-shaped protrusion 161 b formed on the disc-shaped portion 168 and a disc-shaped portion 168.
A hub holding member holding groove 161a formed between
The flange-shaped protruding portion 161b is configured by a partial cutout portion (hub rear end portion storage portion) 161c formed at equal circumferential intervals on the peripheral edge of the flange-shaped protruding portion 161b. The notch portion of the flange-shaped protruding portion 161b and the groove 1 between the notch portion 161c and the disc-shaped portion 168.
A rear end portion 162e of a hub holding member 162, which will be described later, is rotatably housed in the hub holding mechanism constituted by 61a.

A cylindrical portion 163 forming a guide path 171 described later projects from the central portion of the disc-shaped portion 168. Two notches 167a and 167b are formed near the base end of the cylindrical portion 163 of the disc-shaped portion 168. Inside the cylindrical portion 163, the cartridge piercing needle portion 21 of the injection needle is provided.
A guide path 171 for b is formed. Further, as shown in FIG. 15, on the rear end side of the disc-shaped portion 168, a step portion 169 is formed between the cylindrical portion 165 and the disc-shaped portion 165, and the cylindrical portion 165 is formed. A thread groove 166 is formed on the inner surface of the rear end portion, which is screwed with the thread formed on the outer surface of the tip portion of the main body 11 of the syringe. The step portion 169 has an elastic member 115 for urging a hub holding member 162 described later in a direction capable of holding the hub.
A contact surface with (for example, a spring member) is configured.

The hub holding member 162 is shown in FIG. 12 and FIG.
3, the hub holding claw 162a is provided, and the claw 16
2a is formed from the tip end side to the hub guiding inclined portion 162b, the end portion of the inclined portion 162b, the flange engaging portion 162c that engages with the flange 23 of the hub 22, and the outer surface of the hub holding member 162. A protrusion 162d for engaging with a moving member 7, which will be described later, and a hub holding member formed at the rear end and located below the notch 161c of the hub holding member support member 161 described above (on the rear end side). A protrusion 162e housed in the holding groove 161a and an inclined portion 162f that is formed on the bottom surface of the protrusion 162e and is inclined toward the tip side to enable rotation of the hub holding member 162 are provided. As shown in FIG. 11, the hub holding member 162 is
With the rear end projection 162e housed in the hub holding member holding groove 161a of the hub holding member support member 161, a projection 162d for engaging the moving member 7 projects outward in the axial direction. It will be in the state of doing. The front end surface of the protrusion 162d is an engagement surface with a moving member (more precisely, the outer end portion 75a of the cutout portion 74 formed in the peripheral portion of the flat plate portion 70a of the moving member 7 described later), and the rear end surface is , The contact surface with the elastic member 115 for urging the hub holding member 162 in a direction capable of holding the hub.

In the state shown in FIG. 12 in which the injection needle is attached, the bottom surface of the protrusion 162e at the rear end of the hub holding member 162 is an inclined surface 162f, so that the upper surface of the disk-shaped portion 168 of the hub holding member support member is formed. Only the tip is in contact, the other parts are not in contact, and it is a space. For this reason,
The hub holding member 162 has an inclined bottom surface 162 of the protrusion 162e.
It is rotatable until the whole f comes into contact with the upper surface of the disk-shaped portion 168.

Then, as shown in FIG. 12, an elastic member 115 is compressed by the hub holding member support member 161 and the hub holding member 162 to urge the hub holding member 162 in a direction capable of holding the hub 22. It is provided. A spring member is used as the elastic member, and the spring member 115
Of the hub holding member 162 contacts the rear end surface of the protrusion 162d, and the rear end of the spring member 115 contacts the step portion 169 between the cylindrical portion 165 and the disc-shaped portion 168 and is compressed by both. It is in a state of Therefore, the hub holding member is biased by the restoring force of the spring member in the hub direction (in other words, the inner direction of the hub holding portion) about the tip portion of the protrusion 162e at the rear end as an axis. In addition,
The elastic member is further compressible. The elastic member is
The material is not limited to the spring member, and may be a rubber tube or the like.

The movable member 7 movable to the rear end side of the syringe 100 is, as shown in FIGS. 12, 13, 16 and 17, an outer cylinder member 70 and a concentric member in the center of the outer cylinder member 70. And an inner cylinder member 71 fixed to. Outer cylinder member 70
Is provided with a flat plate portion 70a formed at a position slightly distal from the center, the center of the flat plate portion 70a is opened for insertion of the inner cylinder member 71, and the peripheral portion of the flat plate portion 70a is further provided. Is a plurality (specifically,
It has three notches 74. This notch 74 is
It is an opening for passing the claw 162a of the hub holding member 162 described above. The claw 162a and the cutout portion 74
May be two, or four or more. It is preferably three in terms of manufacturing advantages and strength.

The injection needle mounting portion 5 has an injection needle rotation suppressing portion for contacting the injection needle hub 22 when the injection needle is attached and suppressing rotation of the injection needle. Specifically, on the surface of the flat plate portion 70a in the vicinity of the central opening (a portion close to the inner cylinder member 71), a rib for preventing rotation of an injection needle that engages with a rotation preventing groove 24 of the injection needle hub 22 described later. Has 72. In this embodiment, four ribs 72 formed at equal angular intervals are formed. The rib 72 has a triangular cross section when cut perpendicularly to the longitudinal direction.
Although the number of ribs 72 may be one, it is preferable to provide a plurality of ribs 72 in order to more reliably prevent the hub from rotating, and it is preferable that the number of ribs be about 2 to 10. Particularly preferably,
It is 3 to 8. An annular recess 75 is formed on the back surface of the flat plate portion 70a near the central opening (a portion close to the inner tubular member 71), and in cooperation with the outer surface of the inner tubular member 71, an elastic member described later is formed. A storage portion for the end of the (spring member) 8 is formed.

The inner tubular member 71 has a passage 71a through which the tubular portion 163 of the hub holding member supporting member 161 is inserted.
A shoulder portion 71b for joining with the moving outer cylinder member 70 is provided on the outer surface near the central portion in the axial direction, and the distal end side of the shoulder portion 71b penetrates into the hub 22 when the injection needle is attached.
Intrudable part 71c for suppressing rattling of the
It is provided with cartridge pressing portions 73a and 73b for pressing down the two cartridges extending to the rear end side. The cartridge pressing portions 73a and 73b have a substantially crescent-shaped cross section as shown by the broken line in FIG. The cartridge pressing portions 73a and 73b can move downward through the notches 67a and 67b shown in FIG. It should be noted that the cartridge pressing portion may be one, but by providing a plurality (two) as described above, the movement of the cartridge is facilitated. Hub-accessible part 71
Although c is formed in a cylindrical shape, it may be a polygonal cylinder. Further, the hub intrusion portion 71c has a size and a shape that can be inserted into the hub 22 so as to prevent rattling and prevent both side surfaces from engaging with each other.

As shown in FIG. 12, the needle mounting portion 5 of the syringe 100 accommodates the hub holding portion 6 including the elastic member (spring member) 8 and the elastic member 115 in the moving member 7 described above. It is assembled by things. A spring member is used as the elastic member. As a spring member,
Two cartridge pressing portions 73a and 73b of the moving member 7
A cylindrical one that substantially encloses is used. The elastic member 8 is not limited to the spring member, and may be a rubber tube or the like, for example. Further, the three claws 162 a of the hub holding member 162 are provided on the flat plate portion 70 of the moving member 7.
It projects from the three notches 74 formed in a. The moving member 7 and the hub holding portion 6 are provided with a spring member 8 interposed therebetween.
Is urged so that the space between them expands. However, when the injection needle is not attached, the engaging portion 162c of the claw 162a abuts (engages) with the flat plate portion 70a of the moving member 7.
Therefore, the two are not separated. In other words, the claw 162
The spring member is in a compressed state by engaging the engaging portion 162a of the with the flat plate portion 70a of the moving member 7.

Then, the cartridge piercing needle portion 2 of the injection needle
When 1b is inserted into the guide path 171, and pushed forward, the flange 23 of the hub 22 of the injection needle causes the inclined surface 162 of the claw 162a to be inserted.
b. Further, when pushed further, the flange 23 of the hub 22 causes the hub holding member 162 to rotate so as to spread outward, and the flange 23 causes the flange 23 to engage with the engaging portion 162 of the claw 162a.
When the vehicle gets over c, the claw 162a returns to its original state, and the injection needle is fixed to the injection needle mounting portion 5 as shown in FIG.
In this state, the moving member 7 is attached before the injection needle is attached.
Is slightly moved to the proximal side, and the needle hub 22
The flange 23 is held by being sandwiched between the engaging portion 162c of the claw 162 and the flat plate portion 70a of the moving member 7 and being narrowed by the repulsive force of the compressed spring member.

The injection needle 2 comprises a hollow needle 21 and a hub 22. The hollow needle 21 is a so-called double-ended needle having a puncture needle portion 21a for puncturing a patient on the front end side and a cartridge piercing needle portion 21b for piercing a closing member of the cartridge on the rear end side. As shown in FIGS. 7 and 8, the hub 22 has a hollow needle insertion passage 22a, a flange 23, and a large number of radially extending grooves 24 that are evenly formed in an annular shape on the rear end surface of the hub. A large number of grooves 24 formed in this annular shape
Engages with the injection needle rotation preventing rib 72 formed on the flat plate portion 70a of the moving member 7 described above, and suppresses the rotation of the injection needle. In addition, a thread groove 26 is formed on the inner surface of the side surface portion 25 of the hub 22 in order to enable attachment to a normal syringe by screwing, and the side surface portion 25 is used for screwing. In order to facilitate rotation, it is formed in a polygonal shape (specifically, an octagon) as shown by a broken line in FIG.

The entire syringe 100 including the injection needle mounting portion 5 is formed of a durable material such as sterilizable by autoclave, for example, metal (specifically, stainless steel), hard and heat resistant resin. ing. Then, the injection needle attachment portion 5 is configured such that the thread groove 166 formed on the inner peripheral surface of the rear end of the hub holding member support member 161 is screwed into the thread 11a formed on the side surface of the distal end portion of the syringe body 11,
It is attached as shown in FIGS. 12 and 18. FIG.
Shows the state when the injection needle 2 is detached from the injector 100. The hub holding member support member 161 and the hub holding member 162 held by the hub holding member support member 161 are immovable with respect to the syringe body 11.
However, since the moving member 7 is not fixed to the syringe body 11 and the hub holding portion 6, the moving member 7 should be pushed toward the rear end of the syringe (in the direction of the arrow in FIG. 18) with a force capable of compressing the spring member 8. For example, the moving member 7 moves to the rear end side of the syringe. By this movement of the moving member 7 to the rear end side, the cutout portion 74 formed in the flat plate portion 70a of the moving outer tubular member 70 also moves to the rear of the hub holding member 162, and the hub holding member 16
2 is gradually pushed outward by contacting the inner surface 74a of the cutout portion 74 with the inclined surface formed by gradually becoming thicker toward the rear end side, and eventually the moving member 7 is moved. The outside portion of the cutout portion 74 of the flat plate portion 70a (shoulder portion 75
a) abuts (engages) with the protrusion 162d of the hub holding member 162, the elastic member 115 is compressed, and the hub holding member 16
As the rotation of 2 advances, the ends of the three hub holding members are opened (in other words, the direction in which the holding of the injection needle hub is released) (in other words, the hub holding member support member 1).
61), and the engaging portion 1 of the hub holding member 162.
62c and the flange 23 of the hub 22 of the injection needle do not substantially contact with each other, and the engagement between them is released. This state is the state shown in FIG.

Then, the inner cylindrical member 71 fixed to the moving outer cylindrical member 70 also moves in the rear end direction. At this time, the cartridge pressing portion 73 formed at the rear end of the inner tubular member 71
a and 73b are notches 67a and 67 of the hub holding member 60.
After passing through b, it moves to the rear end side, contacts the front end surface of the cartridge 9, and pushes down the cartridge to the rear end side. The moving distance of the moving member 7 to the rear is determined by the cartridge piercing needle portion 21b.
Is longer than the length that has penetrated into the cartridge, the tip surface of the sealing member 92 of the cartridge 9 has a cutting edge 21c of the cartridge piercing needle portion 21b of the injection needle.
It is on the rear end side, and the cartridge piercing needle portion 21b of the injection needle substantially does not come into contact with the cartridge. As a result, the relationship between the injection needle 2 and the injection needle mounting portion 5 is that the distal end of the tubular portion 163 of the hub holding portion 6 penetrates into the proximal end portion of the injection needle hub 22 and the cartridge piercing needle of the injection needle enters into it. Part 21
Since the state where b has entered and the state where only the tip of the hub-entryable portion 71c has entered the rear end of the hub and the needle hub and the needle mounting portion are not engaged, the needle 2 Can be easily detached from the injection needle mounting portion 5. As described above, in this syringe, the engagement between the injection needle mounting portion 5 and the injection needle hub 22 can be released and the cartridge piercing needle portion 21b in the cartridge sealing member 92 can be released at the same time. , The so-called one-touch can remove the injection needle from the syringe.

In the syringe of this embodiment, the hub holding member support member and the hub holding member are formed as separate members, and the hub holding member is biased inward by the elastic member. Therefore, the hub holding member is not fixed to any member and can be easily moved. Therefore, resistance of the moving member when the moving member is moved is small, and attachment / detachment of the injection needle is easier.

[0046]

EFFECT OF THE INVENTION The syringe of the present invention comprises a drug solution cartridge storage portion, a plunger for pushing a gasket in the drug solution cartridge, and an injection needle mounting portion, and a hub and a puncture needle portion formed on the distal end side. A syringe capable of mounting an injection needle comprising a hollow needle having a cartridge piercing needle portion formed on a rear end side and a hub fixed to an intermediate portion of the hollow needle, wherein the injection needle attaching portion is an injection needle. A hub holding portion that holds the needle hub, a moving member that can move to the rear end side of the syringe, and when the moving member moves to the rear end side of the syringe, the holding of the injection needle hub by the hub holding portion is released, and A hub attaching / detaching mechanism is provided which enables the hub holding portion to hold the injection needle hub when the moving member is located on the distal end side of the syringe. For this reason, it is not necessary to attach and detach the injection needle having the double-ended needle by screwing and releasing, and the attachment and detachment of the injection needle can be performed very easily.

The injection needle of the present invention comprises a hollow needle having blade surfaces formed at the front and rear ends thereof, and a hollow needle fixed to an intermediate portion of the hollow needle.
An injection needle comprising an injection needle hub having an opening at a rear end side, the hub rotating on a hub side in contact with an injection needle rotation suppressing portion formed on an injection needle attaching portion of a syringe to which the injection needle is attached. A suppression unit is provided. Therefore, even when used in a syringe in which the syringe needle is attached to the syringe without screwing, the syringe needle does not rotate and the injection operation is easy.

The injection needle disposal container of the present invention is the injection needle disposal container for the above-mentioned syringe, wherein the disposal container is a disposal container body and a cylinder provided on the upper surface of the disposal container body. And a guide part for guiding the injection needle mounting part of the syringe in the separation member, and the injection needle mounting part is formed below the guiding part. Of the internal space capable of accommodating at least the tip portion of the internal space, and projecting inward from the inner surface of the detaching member forming the internal space, without substantially contacting the hub holding portion,
Moreover, it has a rib that prevents passage of the moving member. According to this waste container, the injection needle attachment part of the syringe with the injection needle attached is pushed into the injection needle detaching member of the waste container, so that the injection needle is removed from the syringe substantially without touching the injection needle. It can be detached very easily and at the same time the needle can be stored.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the syringe of the present invention with an injection needle attached.

FIG. 2 is an enlarged cross-sectional view of the tip of the syringe of the present invention with an injection needle attached.

FIG. 3 is a plan view of a hub holding member that constitutes an injection needle attachment portion of the injector shown in FIG.

FIG. 4 is a front view of the hub holding member shown in FIG.

5 is a plan view of a moving member that constitutes the injection needle mounting portion of the injector shown in FIG.

6 is a cross-sectional view taken along the line AA of the moving member shown in FIG.

FIG. 7 is a partial cross-sectional view of a needle hub used in the needle of the present invention.

FIG. 8 is a bottom view of the needle hub used in the needle of the present invention.

FIG. 9 is an explanatory view for explaining the action when the injection needle is detached from the injector of the present invention.

FIG. 10 is a cross-sectional view of an embodiment of the injection needle waste container of the present invention.

FIG. 11 is a plan view of a syringe of another embodiment with an injection needle attached.

FIG. 12 is an enlarged partial cross-sectional view of the distal end portion of the syringe with an injection needle attached.

FIG. 13 is an explanatory diagram for explaining components of the injection needle attachment portion of the syringe.

FIG. 14 is a plan view of a hub holding member support member including a holding mechanism that holds the hub holding member.

15 is a cross-sectional view taken along the line BB of FIG.

FIG. 16 is a plan view of a hub holding member.

17 is a cross-sectional view taken along the line CC of FIG.

FIG. 18 is an explanatory view for explaining the action when the injection needle is detached from the injector of this embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Syringe 3 Chemical liquid cartridge storage part 4 Plunger 5 Injection needle mounting part 6 Hub holding part 7 Moving member 8 Spring member 60 Hub holding member 61 Guide path forming member 62 Hub holding claw 70 Moving outer cylinder member 71 Inner cylinder member 100 Syringe 161 Hub holding member support member 162 Hub holding member 115 Elastic member

Claims (18)

[Claims] 1. A drug solution cartridge accommodating portion, a plunger for pushing a gasket in the drug solution cartridge, and an injection needle mounting portion, which are formed on a hub, a puncture needle portion formed on the tip side and a rear end side. A syringe having a hollow needle having a cartridge piercing needle portion and a hub fixed to an intermediate portion of the hollow needle, wherein the injection needle attaching portion is a hub holding the injection needle hub. A holding part, a moving member that can move to the rear end side of the syringe, and when the moving member moves to the rear end side of the syringe, the holding of the injection needle hub by the hub holding part is released, and the moving member causes the tip of the syringe to move. A syringe comprising a hub attaching / detaching mechanism that enables the injection needle hub to be held by the hub holding portion when positioned on the side. 2. The moving member accommodates the hub holding portion, and further has a spring member, which is compressed by the moving member and the hub holding portion, in the moving member. The syringe according to claim 1. 3. The hub holding portion is a hub holding member having a plurality of hub holding claws, and is integrally formed with the hub holding member or fixed to the hub holding member, and a cartridge piercing needle portion of an injection needle can be inserted therethrough. The syringe according to claim 1 or 2, further comprising a guide channel forming member. 4. The moving member has an outer cylinder member and an inner cylinder member provided coaxially with the outer cylinder member, and the inner cylinder member penetrates into the hub when the injection needle is mounted and is mounted. The syringe according to any one of claims 1 to 3, further comprising: an intrudable portion in the hub for suppressing rattling of the hub of the injection needle, and a cartridge pressing portion extending to a rear end side. 5. The syringe according to claim 3, wherein the hub holding claw is deformed so as to be spread outward by the movement of the moving member to the rear end side of the syringe. 6. The injection needle hub has a flange formed at a rear end portion thereof, and the hub holding claw is formed at a rear end portion of a hub guide inclined portion formed at a distal end portion thereof. And a flange engaging portion that engages with the flange of the hub. 7. The injection needle attachment part has an injection needle rotation suppressing part for contacting an injection needle hub when the injection needle is attached and for suppressing rotation of the injection needle. Syringe. 8. The injection needle rotation suppressing portion is formed on a surface of a flat plate portion formed so as to be substantially orthogonal to an axis of the moving member and at a position where the injection needle rotation contact portion can contact the injection needle hub when the injection needle is attached. The syringe according to claim 7, which is a rib that is engaged with the rear end of the needle hub. 9. The moving member accommodates the hub holding portion, and further has an elastic member, which is compressed by the moving member and the hub holding portion, in the moving member. The syringe according to claim 1. 10. An injection needle comprising a hollow needle having a blade surface formed at a front end and a rear end, and an injection needle hub fixed at an intermediate portion of the hollow needle and having an opening at a rear end side, wherein the hub is ,
An injection needle, comprising: a hub rotation suppressing portion on the hub side that comes into contact with an injection needle rotation suppressing portion formed in an injection needle mounting portion of a syringe to which the injection needle is attached. 11. An injection needle to be attached to the injector according to claim 7, wherein the injection needle has a hollow needle having a blade surface at a front end and a rear end, and an intermediate portion of the hollow needle. And a hub rotation suppressing part on the hub side that engages with a needle rotation suppressing part formed on the injection needle mounting part of the syringe. An injection needle characterized by comprising. 12. A needle waste container for the syringe according to claim 1, wherein the waste container comprises a waste container body,
It comprises a tubular injection needle releasing member provided on the upper surface of the waste container body, and the releasing member includes a guide portion for guiding the injection needle mounting portion of the syringe into the releasing member, and a guide portion. And an inner space that is formed below the portion and can accommodate at least the tip of the injection needle mounting portion, and projects inward from the inner side surface of the detaching member that forms the inner space and substantially contacts the hub holding portion. An injection needle waste container, characterized in that it has a rib that prevents passage of the moving member without any movement. 13. The hub holding portion has a plurality of hub holding members each having a hub holding claw on a front end side, and a guiding path into which a cartridge piercing needle portion can be inserted, and a rear end portion of the hub holding member. A hub holding member supporting member that rotatably supports the elastic member, and an elastic member that is compressed by the hub holding member supporting member and the hub holding member to urge the hub holding member in a direction capable of holding the hub. The syringe according to claim 1, wherein the syringe is provided. 14. The elastic member for urging the hub holding member is compressed by moving the moving member toward the rear end side of the syringe, and the hub holding member releases the holding of the injection needle hub. The syringe according to claim 13, which is rotatable with respect to the hub holding member support member. 15. The moving member includes an outer cylinder member and an inner cylinder member provided coaxially with the outer cylinder member, and the inner cylinder member penetrates into a hub when the injection needle is mounted and is mounted. The syringe according to claim 13 or 14, further comprising: an intrudable portion in the hub for suppressing rattling of the hub of the injection needle, and a cartridge pressing portion extending to a rear end side. 16. The injection needle hub has a flange formed at a rear end portion thereof, and the hub holding claw is formed at a hub guiding inclined portion formed at a distal end portion thereof and behind the inclined portion. 16. A syringe as claimed in any one of claims 13 to 15 having a flange engagement portion that engages with the flange of the hub. 17. The injection needle attachment part has an injection needle rotation suppressing part for contacting an injection needle hub when the injection needle is attached and for suppressing rotation of the injection needle. Syringe. 18. The injection needle rotation suppressing portion is formed on the surface of a flat plate portion formed so as to be substantially orthogonal to the axis of the moving member and at a position that can contact the injection needle hub when the injection needle is attached. 18. The syringe of claim 17, which is a rib that is engageable with the rear end of the needle hub.