JP2002345958A - Roll casing control pull-back safety injection syringe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll casing control pull-back safety injection syringe, with which safety in use is obtained by pulling back an injection needle. SOLUTION: This syringe is provided with a needle cylinder 10, outer roll casing 20, needle seat 30, plunger 40, plunger glue stopper 50 and injection needle 60. The needle seat 30, to which the injection needle 60 is fitted, and the plunger 40, to which the plunger glue stopper 50 is fitted, are coupled and inserted into the storage hole of the needle cylinder 10. The outer roll casing 20 is installed on the to end of the needle cylinder 10. The outer roll casing is formed with first and second holes and in the case of turning into the first hole, the needle seat 30 is engaged with the chuck teeth of the needle cylinder 10 and the needle seat is fixed. When the outer roll casing is turned into the second hole and the escape hole of the outer roll casing is snapped outside corresponding to the pawl of the needle cylinder 10, the needle seat 30 is moved without being limited inside the storage hole of the needle cylinder 10 and the injection needle 60 can be pulled back by the plunger 40.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retractable safety syringe with a roll casing control.

[0002]

2. Description of the Related Art At the present time, in consideration of the safety of medical staff, general syringes are designed and manufactured so that a needle can be pulled back so as to prevent the risk of puncture and infection by the needle. ing.

[0003]

However, the retraction-type safety syringe currently on the market is difficult to manufacture if its structure is too complicated, cannot increase the passing rate, and cannot be simple. Although it is easy to manufacture and can be mass-produced, it is not welcomed by users and has not been widely used because the combination is not reliable and the movement is poor.

[0004] In view of the above-mentioned problems, the inventor has studied and developed the roll casing control-type retractable safety syringe of the present invention with great effort. It is a primary object of the present invention to provide a roll casing controlled retractable safety syringe that provides safety in use by retracting the injection needle.

It is a secondary object of the present invention to provide a roll casing controlled retraction safety syringe which controls the positioning operation of whether or not the needle seat can be moved. It is a further object of the present invention to provide a roll casing controlled retraction safety syringe which has a simplified structure but operates normally.

[0006]

In order to solve the above-mentioned problems, a roll casing control type retraction safety syringe according to the present invention comprises a needle barrel, an outer roll casing, a needle seat, a push rod, and a push rod. Equipped with a rod glue stopper. The needle barrel has a straight tubular body, has a receiving hole, at least one claw piece is installed at the front end of the tubular body, chuck teeth are formed on the inner edge, and the outer ring groove has an outer ring groove. And a positioning convex point is provided on the outer periphery of the cylindrical body. The outer roll casing includes a ring body, has an axial insertion hole that can be inserted into the cylindrical body of the needle cylinder, an insertion hole is formed in a contraction edge, and an inner protrusion ring is provided on an inner edge of the insertion hole, At least one escape hole is opened in front of the ring body, the first hole, the second hole, and the through hole are connected to form a positioning slot, and a convex groove path is formed from the outer edge to the first hole. It leads to. The needle seat has a cylinder mounting portion provided with an outer ring groove into which two O-shaped rings can be fitted. The needle seat can slide inside the accommodating hole of the needle cylinder. An annular groove is provided on the outer periphery of the shoulder portion, and an infusion hole is formed at the center in the axial direction. The push rod has a rod body having a cut portion at a predetermined position, and a locking hook is provided at a front end. The push rod glue plug is fitted into the front end of the push rod.

[0007] With the above structure, the outer roll casing is swung to face the first position of the needle barrel, and the chuck teeth of the needle barrel are locked in the stopper ring grooves of the needle seat. Alternatively, if the outer roll casing is swiveled to the second position, and the escape hole is flipped outward in correspondence with the claw piece of the needle cylinder, the needle seat can be moved without restriction, and the push rod pulls the injection needle. Because it can be returned, it is a safe syringe.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION In order to further understand the features and effects of the present invention, examples will be described below with reference to the drawings. Referring to FIGS. 1 to 3, a roll-casing-controlled retraction safety syringe according to an embodiment of the present invention includes an injection needle 6.
The present invention provides an insertion casing of
, Outer roll casing 20, needle seat 30, push rod 40
And a push rod glue stopper 50.

As shown in FIGS. 4 to 6, the needle barrel 20 includes a straight tubular body 11 and has a receiving hole 12 formed therein. The three claw pieces 13 are installed at the front end of the cylindrical body 11 by dividing the circumference into three equal parts, each of which forms a chuck tooth 131 in the inner edge direction, and the three spacer pieces 14 are provided between the claw pieces 13. . An outer ring groove 15 is formed at a predetermined position on the outer circumference, a positioning convex point 16 is installed on the outer circumference of the cylindrical body 11, a knob 17 is installed on the outside of the other end of the cylindrical body 11, and a push bar retaining edge 18 is housed. It is provided near the opening of the hole 12.

As shown in FIGS. 7 to 10, the outer roll casing 20 includes a ring 21 having a circular shape. The axial insertion hole 22 can be inserted into the cylindrical body 11 of the needle barrel 10, the contracting edge 23 forms an insertion hole 24, the inner protruding ring 25 is installed at the inner edge of the insertion hole 22, and three escape holes are provided. Hole 26 is ring 2
It is set up at an even angle distribution in front of 1. The positioning groove 27 has a first hole 271 and a second hole 272 connected to each other, a convex boundary portion 273 formed therebetween, and the elastic hole 2.
8 is provided on one side of the convex boundary portion 273, and the convex dot-shaped groove path 29 communicates from the outer edge to the first hole 271.

As shown in FIG. 11 to FIG.
Is an outer ring groove 32 into which two O-shaped rings 70 can be fitted.
Is provided. Housing hole 1 of needle tube 10
The insertion hole 33 forms an inward retaining edge 34, and a retaining shoulder 35 is provided on one side of the cylinder mounting portion 31. A protective casing 36 is provided at the other end of the shoulder portion 35, a ring groove 37 is provided on the outer periphery of the shoulder portion, and an injection needle connecting tube 38 is fitted with and fixed to the injection needle 60.
9 leads to the insertion hole 33.

[0013] As shown in FIGS.
Is provided with a rod body 41 having a long cross-shaped cross section. A cutting portion 42 is provided at a predetermined position, and a neck portion 43 is provided at a front end. The locking hook 44 is further provided at the front end, a stop plate 45 is provided between the cutting portion 42 and the neck 43, and a push plate 47 for pushing with a finger is provided at the rear end. The push rod glue plug 50 includes a ring body 51 forming a fitting hole 52 at the center, and is fitted into the neck 43 of the push rod 40.
The outer convex ring is sealed in the accommodation hole 12 of the needle barrel 10.

The operation and operation of this embodiment will be described below. The combination position in FIG. 3 shows a combination state before use of the roll casing control type retraction safety syringe according to one embodiment of the present invention, or is a use state diagram at the time of extracting a drug solution, or at the time of injection. Is a use state diagram, and when the push rod 40 is pulled back, a chemical solution can be extracted.

At this time, the needle seat 30 must be in a locked and fixed state. Further, referring to FIG. 15, the first hole 271 of the outer roll casing 20 has the positioning convex point 16 (ie, the first Position), and each chuck tooth 131 of the claw piece 13 of the needle cylinder 10 does not deform outward, so that each chuck tooth 131 remains caught in the stop ring groove 37 of the needle seat 30, Since the needle seat 30 is not moved, the stationary state is maintained and stability and safety are maintained during use.

FIG. 16 is a view showing a state after the injection of the roll casing control type retractable safety syringe according to one embodiment of the present invention.
Of the push rod 40 at this time.
And the needle seat 30 are in an interlocked state. At this time, when retracting, as shown in FIG. 17, the outer roll casing 20 is swirled to allow the positioning convex point 16 of the needle tube 10 to pass through the convex boundary portion 273 of the outer roll casing 20, and
It is positioned in the hole 272 (that is, the second position).

Further, as shown in FIGS. 18 and 19, each claw piece 13 of the needle barrel 10 is
6, when the push rod 40 is pulled back, the retaining edge 34 of the needle seat 30 moves and the needle barrel 10
Of the outer roll casing 20 by pressing the claw pieces 13
The needle seat 30 can be smoothly pulled back. At this time, since the protective casing 36 of the needle seat 30 houses and surrounds the casing head 61 of the injection needle 60, it is possible to protect the injection needle 60 from coming into contact with the needle tube 10 and falling off.

Finally, FIG. 20 is a view showing a state after the push rod of the roll casing control type retractable safety syringe according to one embodiment of the present invention has pulled back the injection needle, and the stop plate 45 of the push rod 40.
Of the needle barrel 10 is blocked by the push bar retaining edge 18 of the needle barrel 10. When the push rod 40 is bent, the cut portion is torn, and the push bar is cut, so that the needle seat 30 and the injection needle 60 are accommodated in the accommodation hole of the needle barrel 10. 1
2 inside.

From the above description, the features of one embodiment of the present invention can be summarized as follows. 1. The retractable safety syringe of the roll casing control type in one embodiment of the present invention can have safety in use by pulling back the injection needle together with the needle seat with a push rod.

2. The roll casing controlled retractable safety syringe in one embodiment of the present invention controls the positioning operation of whether or not the needle seat moves by using the outer roll casing to pivot and position at different positions. I do. 3. The roll casing control type retractable safety syringe according to one embodiment of the present invention can be normally operated with a simplified structure by the combination of the outer roll casing and the needle barrel and the engagement with the needle seat.

[Brief description of the drawings]

FIG. 1 is a side view showing a roll casing control type retraction safety syringe according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a roll casing control type retraction safety syringe according to an embodiment of the present invention.

FIG. 3 is a side sectional combination view of the roll casing control type retractable safety syringe according to an embodiment of the present invention, showing a disengaged state before injection.

FIG. 4 is a side view of a cylinder of the roll casing control type retraction safety syringe according to one embodiment of the present invention.

FIG. 5 is a cross-sectional view of the cylinder of the roll-back control type retractable safety syringe according to one embodiment of the present invention.

FIG. 6 is a sectional view taken along line 6-6 of FIG. 4;

FIG. 7 is a top view of an outer roll casing of a roll casing control type retraction safety syringe according to an embodiment of the present invention.

FIG. 8 is a cross-sectional view of an outer roll casing of a roll casing control type retraction safety syringe according to an embodiment of the present invention.

FIG. 9 is a view showing an end face of an outer roll casing of a roll casing control type retractable safety syringe according to an embodiment of the present invention.

FIG. 10 is an enlarged sectional view taken along line 10-10 in FIG. 9;

FIG. 11 is a side view showing a needle seat of a roll casing control type retraction safety syringe according to an embodiment of the present invention.

FIG. 12 is a cross-sectional view showing a needle seat of a roll casing control type retraction safety syringe according to an embodiment of the present invention.

FIG. 13 is a side view showing a push rod of a roll casing control type retraction safety syringe according to an embodiment of the present invention.

FIG. 14 is a cross-sectional view showing a push rod of a roll casing control type retractable safety syringe according to an embodiment of the present invention.

FIG. 15 is a combination three-dimensional view of a needle tube and an outer roll casing of a roll casing control type retraction safety syringe according to an embodiment of the present invention, showing a state of being rotated and engaged.

FIG. 16 is a cross-sectional view of the roll-casing-controlled retractable safety syringe according to one embodiment of the present invention, showing a state in which a push rod is engaged after injection.

FIG. 17 is a combined three-dimensional view of the needle cylinder and the outer roll casing of the roll casing control type retractable safety syringe according to an embodiment of the present invention, showing a state where the needle barrel is rotated and disengaged.

FIG. 18 is a sectional view showing a combination of the roll casing control type retraction safety syringe according to one embodiment of the present invention, showing a state in which the push rod retracts the needle seat.

FIG. 19 is an enlarged view of a part of FIG. 18;

FIG. 20 is a cross-sectional view of the roll-casing-controlled retractable safety syringe according to one embodiment of the present invention, showing a state where the push rod completely retracts the needle seat.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Needle cylinder 11 Cylindrical body 12 Housing hole 13 Claw piece 16 Positioning convex point 20 Outer roll casing 21 Ring body 22 Fitting hole 26 Escape hole 27 Positioning groove hole 30 Needle seat 31 Cylinder mounting part 37 Stop ring groove 39 Infusion hole 40 Push rod 41 rod body 42 cutting section 44 locking hook 50 push rod glue plug 60 injection needle 131 chuck tooth 271 first hole 272 second hole

Continuation of the front page F term (reference) 4C066 BB01 CC01 DD08 EE14 FF05 HH12 JJ08 LL12

Claims (4)

[Claims] 1. It has a straight cylindrical body, the accommodation hole is penetrated,
At least one claw piece is provided at a front end of the cylindrical body, has a needle barrel forming a chuck tooth at an inner edge thereof, and a ring body having a circular shape, and has an axial direction that can be inserted into the cylindrical body of the needle barrel. An outer roll casing having a fitting hole, at least one escape hole being opened in front of the ring body, and being capable of rotating and positioning to a different position with respect to the needle barrel; It has a needle seat that has a cylindrical mounting part that can slide inside, has a stopper ring groove provided on the outer circumference, and has an infusion hole that penetrates the center in the axial direction, and a rod body that has a cut part at a predetermined position. A push rod having a hook installed at a front end thereof; and a push rod glue plug fitted into the front end of the push rod and closing the accommodation hole of the needle barrel. 1 position, and the chuck teeth of the needle barrel are When the hook is hooked on the ring groove, or the outer roll casing is swung to the second position, and the relief hole is flipped outward in correspondence with the claw piece of the needle barrel, the needle seat is not restricted. The injection syringe can be retracted by the push rod, so that the injection needle can be retracted to provide a safe syringe. 2. The roll casing according to claim 1, wherein the number of the relief holes in the outer roll casing is three, and the outer roll casing is opened at an even angle before the ring body. Controlled retractable safety syringe. 3. The needle barrel further includes an outer ring groove on the outer periphery, and the outer roll casing has an inner protruding ring, and is rotatable by being hooked on the outer ring groove of the needle barrel. The roll casing controlled retractable safety syringe according to claim 1. 4. The needle barrel further includes a positioning convex point on the outer periphery, and the outer roll casing has a first hole, a second hole, and a through hole formed in series, and the outer roll casing is formed at the positioning convex point of the needle cylinder. 2. The retractable safety syringe with roll casing control according to claim 1, further comprising a positioning slot that can be fitted and positioned.