JP2002035128A - Needle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a needle capable of housing the tip of a needle body after use by a simple operation without disturbing a needling operation or the like and having a high safety for disposal. SOLUTION: The needle 1 comprises a needle tube 2 having a sharp tip 21 at its distal end, a hub 3 fixed to the proximal end of the tube 2, a protector 4 rotatably installed at the tube 2 and capable of housing (covering) at least the tip 21 of the tube 2, and a rotating mechanism 5 for rotatably supporting the protector 4. The protector 4 has a U-shaped sectional covering part 41 for housing at least the tip 21 and am arm 45. The mechanism 5 has a shaft 51 of a substantially octagonal shape formed at the end of the arm 45, and a bearing 53 having a substantially octagonal shape hole for supporting the shaft 51 and has a function for fixing at multiple stages the attitude (rotary angle) of the protector 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a puncture device which is used, for example, by attaching it to a syringe or a connector and punctures a blood vessel or the like.

[0002]

2. Description of the Related Art When collecting blood or administering a drug solution to a patient, an injection needle is attached to the tip of a syringe, and the injection needle is punctured into a patient's blood vessel. Such injection needles
It comprises a needle tube (needle body) having a sharp needle tip at the distal end, and a hub fixed to the proximal end of the needle tube.

When blood is collected from a patient, an operation of pulling a plunger provided in the syringe is performed to draw blood into the syringe. In addition, when administering a drug solution to a patient, an operation of pressing a plunger is performed to inject the drug solution stored in the syringe into a blood vessel of the patient.

[0004] By the way, the injection needle and the syringe after the blood collection and the administration of the medicinal solution to the patient are no longer necessary, and therefore are separately disposed of, respectively. There is a possibility that an accident such as sticking a finger or the like with a needle point may occur. In particular, since blood adheres and remains on the surface and inside of the needle, infection may occur due to such a stab.

[0005] Therefore, measures have been taken to dispose of used syringe needles by disposing the needle tube with a cylindrical cap.

[0006] However, such a work of putting the cap on the needle tube is performed by inserting the needle tube from the needle tip into the opening at one end of the cap. Great care must be taken to prevent blood from reaching the operator's hand or stabbing the operator's hand with the needle tip, which requires a great deal of time to dispose of the injection needle after use. There is a problem that requires.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a puncture device which can store a used needle tip by a simple operation without hindering a puncture operation and the like, and is highly safe for disposal treatment and the like. To provide tools.

[0008]

This and other objects are achieved by the present invention which is defined below as (1) to (13).

(1) A needle body having a needle tip at the tip, a hub installed at the base end of the needle body, a first position covering at least the needle tip of the needle body, and being separated from the needle body. A protector rotatable to a second position, and a rotating mechanism rotatably supporting the protector, wherein the rotating mechanism comprises:
A puncture device having a function of fixing a rotation angle of the protector.

(2) The puncture device according to (1), wherein the rotating mechanism has a hinge structure.

(3) The puncture device according to the above (2), wherein the rotation mechanism has a shaft and a bearing, and is provided with an engagement portion for suppressing rotation of the shaft.

(4) The above-mentioned (3), wherein the inner surface of the bearing and / or the outer surface of the shaft have polygonal portions, whereby the rotation angle of the protector can be fixed in multiple stages. Puncture device.

(5) The outer surface of the bearing has a polygonal portion, and the engaging portion is engaged with the polygonal portion so that the rotation angle of the protector can be fixed in multiple stages. The puncture device according to (3) above.

(6) The puncture device according to any one of (1) to (5), wherein the rotation mechanism is configured to fix the rotation angle of the protector in multiple steps.

(7) The rotation angle of the protector is 3
The puncture device according to any one of the above (4) to (6), which can be fixed in up to 16 steps.

(8) The puncture device according to any one of (1) to (7), wherein the rotating mechanism is provided on a side portion of the hub.

(9) The protector has a covering portion that covers at least the needle tip of the needle body, and an elastically deformable arm located between the center of rotation of the protector and the covering portion. The puncture device according to any one of (8) to (8).

(10) The puncture device according to any one of (1) to (9), wherein at least a portion of the protector that covers the needle tip has a substantially U-shaped cross section.

(11) The puncture device according to any one of the above (1) to (10), wherein the protector can hold the protector in a state where the needle body is pressed against the inner surface thereof.

(12) The puncture device according to any one of (1) to (11), wherein the protector has a holding means for holding a state where the needle tip of the needle body is covered.

(13) The puncture device according to (12), wherein the holding means comprises an elastically deformable engaging piece.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a puncture device according to the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.

FIGS. 1 and 2 are longitudinal sectional views showing a first embodiment in which the puncture device of the present invention is applied to an injection needle. FIG. 3 is a sectional view taken along line XX in FIG. FIG.
It is a side view which expands and shows the rotation mechanism in the puncture tool shown in FIG. In the following description, the right side in FIGS. 1 and 2 is referred to as a “proximal end”, and the left side is referred to as a “distal end”.

The puncture device 1 shown in FIGS. 1 and 2 has a needle tube 2 having a sharp needle tip 21 at the distal end, a hub 3 fixed to the proximal end of the needle tube 2, and a pivot with respect to the needle tube 2. The protector 4 includes a protector 4 that is installed so as to be able to store (cover) at least the needle tip 21 of the needle tube 2 and a rotating mechanism 5 that rotatably supports the protector 4. Hereinafter, the configuration of each unit will be described.

The needle tube 2 is a hollow needle and is made of a metal material such as stainless steel, aluminum or an aluminum alloy, titanium or a titanium alloy.
A sharp needle tip 21 is formed at the tip of the needle tube 2. The shape of the needle tip 21 is not particularly limited, and in the present embodiment, has a blade surface inclined at a predetermined angle with respect to the axis of the needle tube 2.

At the base end of the needle tube 2, a hub 3 is fixed (fixed) in a liquid-tight manner, and the lumen of the needle tube 2 communicates with the inside of the hub 3.

The method of fixing the needle tube 2 to the hub 3 is not particularly limited, and for example, caulking, fusion (heat fusion,
High-frequency fusion), bonding with an adhesive, and the like.

The length of the needle tube 2 is set so that the needle tip 21 does not protrude (protrude) from the tip of the protector 4 when the needle tube is covered with the protector 4.

The hub 3 is made of a substantially cylindrical member, and is preferably made of a transparent (colorless and transparent), colored transparent or translucent resin, and the internal visibility is secured.

The hub 3 has a tapered shape whose outer diameter and inner diameter gradually increase toward the base end. The tapered portion includes, for example, a distal end protruding portion 61 of the syringe 6.
Are inserted and fitted, whereby the puncture device 1 is
Attached to.

A flange 31 protruding in a ring shape is formed on the outer periphery of the base end of the hub 3. For example, syringe 6
Operation of attaching the puncture device 1 to the
At the time of the operation of removing the, the finger can be hooked on the flange 31 to perform this operation, whereby the operation can be performed reliably.

A plurality of (four in the configuration shown) ribs 32 are formed on the outer periphery of the distal end of the hub 3.

The constituent materials of the hub 3 and the protector 4 described later are not particularly limited. For example, polyolefins such as polyethylene, polypropylene, polybutadiene, and ethylene-vinyl acetate copolymer, polyvinyl chloride, polyurethane, polystyrene, and polystyrene, respectively. Various resin materials such as methyl methacrylate, polycarbonate, polyamide, polyester such as polyethylene terephthalate and polybutylene terephthalate, acrylic resin, ABS resin, AS resin, ionomer, polyacetal, polyphenylene sulfide, and polyetheretherketone are exemplified.

The protector 4 has a cover 41 covering at least the needle tip 21 of the needle tube 2 and an arm (support member) 45 connecting the center of rotation of the protector and the cover 41.
These are preferably integrated. Since the covering portion 41 and the arm 45 are integrally formed, the protector 4 can be rotatably installed with a small number of components and a simple configuration. The arm 45 is made of an elastically deformable material, and is slightly bent.

As shown in FIG. 3, the covering portion 41 has a pair of opposing side walls (side plates) 42, 42, and both side walls 42, 42.
And a bottom part (bottom plate) 43 connecting the base parts 42, and has a substantially U-shaped cross section. A groove 44 is formed between the side walls 42, 42, and the needle tip 2 of the needle tube 2 is formed in the groove 44.
1 are inserted and stored. The side walls 42, 42 are installed substantially in parallel.

Such a protector 4 is rotatably supported by a rotating mechanism 5 provided on the side of the hub 3. By this rotating mechanism 5, the protector 4 is in a first position covering at least the needle tip 21 of the needle tube 2 (see FIG. 3).
And a second position (see FIG. 1) apart from the needle body 2.

The rotation mechanism 5 has a function of fixing the posture (rotation angle) of the protector 4, particularly a function of fixing in multiple stages, as described in detail below. Thereby, the needle tube 2
It is possible to prevent the protector 4 from swinging with respect to the hub 3 at the time of the puncturing operation on the living body or the like, thereby hindering the operation. Hereinafter, the configuration and operation of the rotating mechanism 5 will be described in detail.

As shown in FIG. 4, the rotating mechanism 5 includes a shaft 51 formed at the end of the arm 45 and a bearing 53 for supporting the shaft 51.

The shaft 51 is formed substantially perpendicular to the arm 45, and the cross-sectional shape of the shaft 51 is substantially octagonal. On the other hand, the bearings 53 are provided side by side on the side of the hub 3 (in a direction perpendicular to the plane of FIG. 4), and the arm 45 passes between them. The bearing 53 is provided with a hole 54 through which the shaft 51 is inserted. This hole 54 also has a shape corresponding to the shaft 51, that is,
It is substantially octagonal. This hole 54 has eight valleys 5
5 are formed.

The eight ridges 52 formed on the shaft 51 constitute an engaging portion for suppressing the rotation of the shaft 51. That is, when the shaft 51 attempts to rotate in a counterclockwise direction, for example, from a state in which each peak 52 of the shaft 51 is inserted into each trough 55 of the hole 54 (a solid line in FIG. 4), the peak 52 is troughed. It is pushed over the flat part between the parts 55 while being pressed, and inserted into the next valley part 55. As a result, the shaft 51 is rotated by 45 ° and its position is maintained. As described above, the resistance when the peak 52 moves (gets over) from the trough 55 to the adjacent trough 55 suppresses the rotation of the shaft 51 and holds the position of the protector 4.

As described above, in the rotating mechanism 5 according to the present embodiment, since the inner surface of the bearing 53 and the outer surface of the shaft 51 are each formed in an octagon, the rotating angle of the protector is increased stepwise by 45 °. It can be fixed (see FIG. 1).

In this case, the number of steps at which the rotation angle of the protector 4 can be fixed is not particularly limited, but is preferably fixed at 3 to 16 steps, more preferably at 3 to 5 steps.

In this embodiment, as shown in FIG. 1, the posture of the protector 4 is changed to position A, position B, position C and position D.
Can be fixed (set) in four stages.

Normally, the protector 4 is set at the position A or the position B, and the needle tip 21 is punctured into the living body.

After the needle tip 21 has been removed from the living body, the protector 4 is rotated counterclockwise in FIG.

In a conventional cap or the like, the needle tip 2 of the needle tube 2 is used.
Since the cap was mounted so as to cover the needle tube 2 by moving the cap in the axial direction of the needle tube 2 from the side 1, when the needle tip 21 did not enter the base end opening of the cap and came off the opening, the cap was picked up. There was a risk that an accident could occur in which a finger was accidentally stabbed by the needle tip of the needle tube 2, but in the present invention, the protector 4 approached from the side of the needle tube 2 and covered the needle tip 21, and as described above, Accidental stabs, contamination due to blood adhesion, and the like can be effectively prevented.

The range of the rotation angle of the protector 4 (the range of the maximum rotatable angle) is not particularly limited.
It is preferably about 80 °, more preferably 90 ° or more and less than 180 °, and further preferably about 100 ° to 165 °. Within such a range, operability such as puncturing is particularly excellent.

In the position where the protector 4 covers the needle tip 21 (position D), the rotating mechanism 5 can hold the protector 4 in a state where the needle body 2 is pressed against the inner surface of the bottom 43. Fixed position is set. Thereby, the needle tip 2
The protector 4 covering 1 is prevented from returning in the opposite direction and detaching from the needle tip 21.

At the position where the protector 4 covers the needle tip 21 (position D), the tip of the covering portion 41 of the protector 4
The needle tip 21 is located on the distal end side from the needle tip 21, and the needle tip 21 does not protrude from the covering portion 41.

An engaging piece 46 is provided in the groove 44 of the protector 4 as holding means for holding a state in which the needle tip 2 of the needle tube 2 is covered (see FIGS. 1 and 3).

The engagement piece 46 is an elastically deformable plate-like member, and as shown in FIG.
The cover 41 may be formed integrally with the cover 41 or another member may be fixed thereto.

The engaging piece 46 is formed so that the needle tube 2 is connected to the protector 4.
(When the protector 4 moves from the position C to the position D), it is possible to move beyond the engagement piece 46 toward the depth of the groove 44 (the bottom 43 of the protector 4). However, once in this state, even if the needle tube 2 attempts to move in the direction (upward in FIG. 3) going out of the groove 44, the needle tube 2 comes into contact with the engagement piece 46 and is moved upward in FIG. The pressed end portion 47 of the engagement piece 46 comes into contact with the inner surface of the side wall portion 42 and cannot move further upward, and the needle tube 2 attempts to exit the groove 44 beyond the engagement piece 46. To block.

By providing such holding means,
After the protector 4 has once covered the needle tip 21 of the needle tube 2, the state is maintained thereafter, and the needle tip 21 is prevented from being accidentally exposed to the outside of the protector 4, so that high safety is maintained. .

It is needless to say that the structure, function and the like of the holding means are not limited to those shown in the drawings.
A clip, a chuck, or the like that holds the needle tube 2 may be used. Further, a device having no such holding means may be used.

Next, an example of a method of using the puncture device 1 will be described in detail. [1] The distal end projection 61 of the syringe 6 is attached to the hub of the puncture device 1
Is inserted and fitted, and protector 4 is moved to position A, for example.
Alternatively, the syringe 6 is grasped while being separated from the needle tube 2 as the position B.

The position of the protector 4 (for example, position A
Alternatively, the position B) can be appropriately selected as desired by the operator, and the operation can be performed more easily.

[2] In this state, the needle tip 21 of the needle tube 2 is punctured into a blood vessel (vein or artery) of the patient, and a plunger (not shown) provided in the syringe 6 is operated to collect blood from the patient. Alternatively, a drug solution in the syringe is injected.

At the time of this puncturing operation, since the protector 4 has a fixed posture (rotation angle), the protector 4 is prevented from swinging with respect to the hub 3 and hindering the operation.

[3] When the collection of the blood or the injection of the drug solution is completed, the needle tube 2 is withdrawn from the blood vessel of the patient.

[4] Next, the protector 4 is rotated counterclockwise in FIG. Thereby, the covering portion 41 of the protector 4 covers at least the needle tip 21 of the needle tube 2.

Further, when the bottom portion 43 of the protector 4 is pressed with a finger, the needle tube 2 moves beyond the engagement piece 46 toward the deep portion of the groove 44 (the bottom portion 43 of the protector 4), and contacts the inner surface of the bottom portion 43. Touch In this state, even if the needle tube 2 attempts to return (even if the needle tube 2 moves in a direction away from the inner surface of the bottom portion 43), the function of preventing the movement of the needle tube 2 in the opposite direction by the above-described engagement piece 46 causes the engagement of the engagement tube. The needle tip 2 of the needle tube 2 cannot be moved out of the groove 44 beyond 46 and is retained in the groove 44.

[5] As described above, the needle tip 2 of the needle tube 2
When the puncture device 1 is stored in the protector 4, the puncture device 1 is mounted on the syringe 6 and disposed of.

Further, the tip projecting portion 61 of the syringe 6 may be withdrawn from the hub 3 to separate the puncture device 1 and the syringe 6 and discarded separately.

The needle tip 21 of the puncture device 1 is housed in the protector 4, and in particular, since the needle tip 21 does not protrude from the tip of the protector 4 and does not come off, the discarding person etc. Is prevented from accidentally stabbing a finger or the like with the needle tip 21.

FIG. 5 is a side view showing another example of the structure of the rotating mechanism according to the present invention. Hereinafter, the rotation mechanism 5 'shown in FIG. 5 will be described focusing on the differences from the rotation mechanism 5 shown in FIG. 4, and the description of the same matters will be omitted.

The rotation mechanism 5 ′ has a function of fixing the attitude (rotation angle) of the protector 4, particularly a function of fixing the protector 4 in multiple steps, as described above. It is possible to prevent the protector 4 from swinging with respect to the hub 3 at the time of the puncturing operation, thereby hindering the operation.

As shown in FIG. 5, the rotating mechanism 5 ′ includes a shaft 56 formed at the end of the arm 45, a bearing 57 supporting the shaft 56, and a block (engagement) formed on the arm 45. ) 58).

The shaft 51 is formed substantially perpendicular to the arm 45, and the cross-sectional shape of the shaft 56 is circular. On the other hand, the bearings 57 are provided side by side on the side of the hub 3 (in a direction perpendicular to the plane of FIG. 5), and the arm 45 passes between them. The bearing 57 is provided with a circular hole 571 through which the shaft 56 is inserted.

On the outer surface of the bearing 57, a polygonal portion having four ridges (engaging portions) 59 is formed.

The state in which the block 58 is located at the top of the bearing 57, that is, the state in which the lower surface 581 of the block 58 faces (or is in contact with) the flat portion 591 between the peaks 59, 59 (solid line in FIG. 5). Therefore, when the shaft 56 attempts to rotate in a counterclockwise direction, for example, the lower surface 581 of the block 58 climbs over while being pressed against the mountain portion 59, and faces (or contacts) the flat portion 591. Thereby, the shaft 56 is set at 45 °
It rotates and its position is maintained. As described above, the resistance when the block 58 moves from a certain flat portion 591 over the mountain portion 59 to the adjacent flat portion 591 suppresses the rotation of the shaft 56 and holds the position of the protector 4.

As described above, in the rotating mechanism 5 ′ of the present embodiment, the outer surface of the bearing 57 is formed in a shape similar to a part of the octagon, so that the rotating angle of the protector 4 is 4 °.
It can be fixed stepwise by 5 °.

Also in this case, the protector 4
The number of steps at which the rotation angle can be fixed is not particularly limited, but is preferably fixed at 3 to 16 steps, more preferably 3 to 5 steps.

In this embodiment, as shown in FIG. 1, the posture of the protector 4 is changed to position A, position B, position C and position D.
Can be fixed (set) in four stages.

FIG. 6 is a longitudinal sectional view showing a second embodiment of the present invention. In this embodiment, as shown in FIG. 6, there is provided a cap 7 fitted and mounted on the outer periphery of the distal end side of the hub 3 and capable of covering the needle tube 2, and otherwise the same as in the first embodiment. It is.

Since the cap 7 is attached, infection caused by erroneous puncture at the needle point 21 is prevented before the puncture operation (for example, when the operation of attaching the syringe 6 and the puncture device 1 is performed). be able to. The cap 7 is removed immediately before the puncturing operation.

The constituent material of the cap 7 is not particularly limited, and the same materials as those for the hub 3 and the protector 4 can be used.

The cap 7 is mounted so as to fit around the distal end side of the hub 3.
Is in contact with a rib 33 formed on the outer periphery on the distal end side of the hub 3.

When the cap 7 is mounted, the protector 4
Cannot be displaced to the position for storing and holding the needle tube 2 (position D shown in FIG. 1) because it interferes with the cap 7, but it must be fixed to any of the positions A, B and C. Can be. After the cap 7 is removed, the protector 4 can be displaced to a position (position D shown in FIG. 1) in which at least the needle tip 21 of the needle tube 2 is stored and held.

Although the puncture device of the present invention has been described with reference to the illustrated embodiment, the present invention is not limited to this, and each part constituting the puncture device may have any function capable of exhibiting the same function. It can be replaced with that of the configuration.

In particular, the rotating mechanism is not limited to the one shown in the figure. For example, the posture (rotation angle) of the protector 4 is adjusted by a mechanism such as a concave / convex engaging portion, a ball click, a diameter fitting, a spring, and a tension hinge. ) May be set in two or more stages.

The puncture device of the present invention can be applied not only to various types of injection needles but also to, for example, an indwelling needle assembly used in combination with an indwelling needle (outer needle).

[0082]

As described above, according to the present invention, the used needle body can be quickly and safely stored in the protector with a simple operation, and the blood can be contaminated during disposal or the like. Thus, it is possible to provide a puncture device that is extremely excellent in hygiene and safety, without accidents such as accidentally stabbing a finger or the like with a needle tip.

In addition, since the rotation angle of the protector can be regulated, there is no inconvenience that the protector swings and hinders the operation during a needle puncturing operation or the like.

In particular, in the case where the rotation angle of the protector can be fixed in multiple stages, the posture (fixed portion) of the protector can be selected at the time of puncturing operation of the needle body, etc. Can be operated under better conditions.

Further, the present invention can achieve the above-mentioned effects with a small and simple structure and a small number of parts.

[Brief description of the drawings]

FIG. 1 shows a first example in which the puncture device of the present invention is applied to an injection needle.
It is a longitudinal section showing an embodiment.

FIG. 2 shows a first example in which the puncture device of the present invention is applied to an injection needle.
It is a longitudinal section showing an embodiment.

FIG. 3 is a sectional view taken along line XX in FIG.

FIG. 4 is an enlarged side view showing a rotating mechanism of the puncture device shown in FIG. 1;

FIG. 5 is a side view showing another configuration of the rotating mechanism.

FIG. 6 shows a second example in which the puncture device of the present invention is applied to an injection needle.
It is a longitudinal section showing an embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 puncture device 2 needle tube 21 needle tip 3 hub 31 flange 32 rib 33 rib 4 protector 41 covering part 42 side wall part 43 bottom part 44 groove 45 arm 46 engaging piece 47 end part 5, 5 'rotating mechanism 51 shaft 52 mountain part 53 Bearing 54 Hole 55 Valley 56 Shaft 57 Bearing 571 Hole 58 Block 581 Lower surface 59 Mountain 591 Flat portion 6 Syringe 61 Tip projecting portion 7 Cap

Claims (13)

[Claims] 1. A needle body having a needle tip at a distal end, a hub installed at a base end of the needle body, a first position covering at least the needle tip of the needle body, and a first space separated from the needle body. A protector rotatable to position 2; and a rotation mechanism rotatably supporting the protector, wherein the rotation mechanism has a function of fixing a rotation angle of the protector. Puncture device characterized by the following. 2. The puncture device according to claim 1, wherein the rotating mechanism has a hinge structure. 3. The rotating mechanism has a shaft and a bearing,
The puncture device according to claim 2, further comprising an engagement portion that suppresses rotation of the shaft. 4. A bearing having a polygonal portion on an inner surface of a bearing and / or an outer surface of a shaft so that a rotation angle of the protector can be fixed in multiple stages.
The puncture device according to 1. 5. A bearing having a polygonal portion on the outer surface of the bearing, wherein the engaging portion is engaged with the polygonal portion so that the rotation angle of the protector can be fixed in multiple stages. The puncture device according to claim 3, which is provided. 6. The rotation mechanism according to claim 1, wherein the rotation mechanism can fix the rotation angle of the protector in multiple stages.
6. The puncture device according to any one of items 1 to 5. 7. The rotation angle of the protector is 3-16.
7. The puncture device according to claim 4, which can be fixed in stages. 8. The puncture device according to claim 1, wherein the rotating mechanism is provided on a side of the hub. 9. The protector according to claim 1, wherein the protector includes a covering portion that covers at least a needle tip of the needle body, and an elastically deformable arm positioned between a rotation center of the protector and the covering portion. The puncture device according to any one of the above. 10. The puncture device according to claim 1, wherein at least a portion of the protector that covers the needle tip has a substantially U-shaped cross section. 11. The puncture device according to claim 1, wherein the protector can hold the protector in a state where the needle body is pressed against an inner surface thereof. 12. The puncture device according to claim 1, wherein the protector has holding means for holding a state in which the needle tip of the needle body is covered. 13. The puncture device according to claim 12, wherein the holding means is formed of an elastically deformable engaging piece.