JP3727284B2 - Roll casing controlled pull-back safety syringe - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a roll casing controlled pull-back safety syringe.
[0002]
[Prior art]
Currently, all of the general syringes are designed and manufactured so that the needle can be pulled back in consideration of the safety of medical personnel, and the risk of puncture and infection by the needle is prevented.
[0003]
[Problems to be solved by the invention]
However, pull-back type safety syringes currently on the market are difficult to manufacture if their structure is too complex, and the acceptance rate cannot be increased, and if the structure is simple, manufacturing is easy and mass production is possible. However, it cannot be said that the combination is firm and the movement is poor, so it is not welcomed by users and is not popular.
[0004]
The inventor researched and developed the roll casing control type pull-back safety syringe of the present invention in view of the problems described above.
The main object of the present invention is to provide a roll casing controlled pull-back safety syringe that is safe to use by pulling back the needle.
[0005]
A secondary object of the present invention is to provide a roll casing controlled pullback safety syringe that controls the positioning operation of whether or not the needle seat is movable.
It is a further object of the present invention to provide a roll casing controlled pullback safety syringe that operates normally while being simplified in construction.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, a roll casing control type pull-back safety syringe according to the present invention comprises a needle tube, an outer roll casing, a needle seat, a push rod, and a push rod glue stopper. The needle cylinder has a straight cylindrical cylinder, is provided with a receiving hole, at least one claw piece is installed at the front end of the cylinder, chuck teeth are formed on the inner edge, and an outer ring groove is formed on the outer periphery. The 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 fitted into the cylinder of the needle cylinder, an insertion hole is formed in the contraction edge, and an inner ring is provided at the inner edge of the insertion hole, At least one escape hole is opened in the front stage of the ring body, the first hole, the second hole, and the through hole are linked to form a positioning groove hole, and the convex groove-like groove path extends from the edge of the outer end to the first hole. It leads to. The needle seat has a cylinder mounting part with an outer ring groove into which two O-rings can be fitted, can slide inside the needle hole, and a stop shoulder is installed on the side of the cylinder mounting part. 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 cutting portion at a predetermined position, and a locking hook is installed at the front end. The push rod glue stopper is fitted in the front end of the push rod.
[0007]
By the structure, by positioning the predetermined first position of the needle cylinder with an outer roll casing is gyratory chuck teeth of the needle cylinder is locked to the locking ring groove in the needle seat. Also, by Rukoto the逃孔the outer roll casing and gyrating to a second position separate from the said first position to correspond to the claw piece of the needle cylinder, dial washer claw piece Te projecting outside the逃孔 Since it can move without restriction, the injection needle can be pulled back by the push rod, so that a safe syringe can be obtained.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
In order to further understand the features and effects of the present invention, examples will be described below with reference to the accompanying drawings.
Referring to FIGS. 1 to 3, a roll casing controlled pull-back safety syringe according to an embodiment of the present invention provides an insertion casing for an injection needle 60, and includes a needle tube 10, an outer roll casing 20, and the like. , Needle seat 30, push bar 40, and push bar glue stopper 50.
[0009]
As shown in FIGS. 4 to 6, the needle cylinder 20 includes a linear cylinder 11, and the accommodation hole 12 is drilled. The three claw pieces 13 are installed at the front end of the cylindrical body 11 with the circumference divided into three equal parts, each forming a chuck tooth 131 in the inner edge direction, and the three claw pieces 14 are provided between the claw pieces 13. . The outer ring groove 15 is formed at a predetermined position on the outer periphery, the positioning convex point 16 is installed on the outer periphery of the cylinder 11, the stagnation portion 17 is installed outside the other end of the cylinder 11, and the push rod stopper edge 18 is accommodated. It is provided near the opening of the hole 12.
[0010]
As shown in FIGS. 7 to 10, the outer roll casing 20 includes a circular ring body 21. The axial insertion hole 22 can be inserted into the cylinder 11 of the needle cylinder 10, the contraction edge 23 forms the insertion hole 24, and the inner projecting ring 25 is installed at the inner edge of the insertion hole 22. The holes 26 are opened at an equal angle in the front stage of the ring body 21. The positioning groove hole 27 is formed by connecting a first hole 271 and a second hole 272, a convex boundary portion 273 is formed therebetween, an elastic hole 28 is provided on one side of the convex boundary portion 273, and a convex dot shape. The groove 29 communicates from the edge of the outer end to the first hole 271.
[0011]
As shown in FIGS. 11 to 12, the needle seat 30 includes a cylinder mounting portion 31 in which an outer ring groove 32 into which two O-rings 70 can be fitted is arranged. The inside of the accommodation hole 12 of the needle tube 10 can be closed and slidable, the insertion hole 33 forms a retaining edge 34 inwardly, and a stop shoulder 35 is installed on one side of the tube mounting portion 31. A protective casing 36 is installed at the other end of the shoulder portion 35, a retaining ring groove 37 is installed at the outer periphery of the shoulder portion, an injection needle connecting tube 38 is fitted and fixed with an injection needle 60, and an infusion hole 39 is inserted. It leads to the hole 33.
[0012]
As shown in FIGS. 13 to 14, the push rod 40 includes a rod body 41 having a long rod shape with a cross-shaped cross section. The cutting part 42 is provided at a predetermined position, and the neck part 43 is installed at the front end. The locking hook 44 is further installed at the front end, a stop plate 45 is provided between the cutting portion 42 and the neck portion 43, and a push plate 47 for pushing with a finger is installed at the rear end. The push rod glue stopper 50 includes a ring body 51 that forms a fitting hole 52 in the center, and is fitted into the neck 43 of the push rod 40, and the outer convex ring is sealed in the accommodation hole 12 of the needle tube 10.
[0013]
The operation and operation of this embodiment will be described next.
The combination position of FIG. 3 shows a combination state before use of the roll casing control type pull-back safety syringe which is an embodiment of the present invention, or is a use state diagram when extracting a medical solution, or at the time of injection It is a use state figure of this, and when the push rod 40 is pulled back, a chemical | medical solution can be extracted.
[0014]
At this time, the needle seat 30 must be in a locked and fixed state, and further referring to FIG. 15, the first hole 271 of the outer roll casing 20 is positioned at the positioning convex point 16 (that is, the first position) of the needle cylinder 10. The chuck teeth 131 of the claw piece 13 of the needle tube 10 are not deformed outward because they are fitted and positioned, so that the chuck teeth 131 remain caught in the retaining groove 37 of the needle seat 30. Because it does not move, the immobile state is maintained and stability and safety are maintained during use.
[0015]
FIG. 16 is a view showing a state after the injection of the roll casing controlled pull-back safety syringe according to an embodiment of the present invention. The locking hook 44 of the push rod 40 is inserted to the retaining edge 34 of the needle seat 30. At this time, the push rod 40 and the needle seat 30 are in an interlocking state.
When pulling back at this time, as shown in FIG. 17, the outer roll casing 20 is rotated, the positioning convex point 16 of the needle tube 10 is passed through the convex boundary portion 273 of the outer roll casing 20, and the second The hole 272 is positioned (that is, the second position).
[0016]
Further, as shown in FIGS. 18 and 19, each claw piece 13 of the needle cylinder 10 is positioned corresponding to the escape hole 26 of the outer roll casing 20, so that when the push rod 40 is pulled back, the needle Since the retaining edge 34 of the seat 30 moves and presses the claw piece 13 of the needle tube 10 to project out of the escape hole 26 of the outer roll casing 20, the needle seat 30 can be pulled back smoothly.
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.
[0017]
Finally, FIG. 20 is a state diagram after the push rod of the roll casing controlled pull-back safety syringe according to the embodiment of the present invention has pulled the injection needle back, and the outer periphery of the stopper plate 45 of the push rod 40 is the push rod of the needle tube 10. When the push rod 40 is bent here, the cut portion is torn and the push rod is cut, so that the needle seat 30 and the injection needle 60 can be retained in the accommodation hole 12 of the needle tube 10.
[0018]
From the above description, the features of one embodiment of the present invention can be summarized as follows.
1. The roll casing controlled pull-back safety syringe in one embodiment of the present invention can be used safely by pulling back the injection needle together with the needle seat with a push rod.
[0019]
2. The roll casing controlled pull-back 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 be rotated and positioned at different positions. To do.
3. The roll casing control type pullback safety syringe in one embodiment of the present invention can be operated normally with a simplified structure by the combination of the outer roll casing and the needle tube and the engagement with the needle seat.
[Brief description of the drawings]
FIG. 1 is a side view of a roll casing controlled pullback safety syringe according to one embodiment of the present invention.
FIG. 2 is an exploded view of a roll casing controlled pullback safety syringe according to one embodiment of the present invention.
FIG. 3 is a side sectional view of a roll casing controlled pull-back safety syringe according to one embodiment of the present invention, showing an unengaged state prior to injection.
FIG. 4 is a side view of a cylinder of a roll casing controlled pull-back safety syringe according to an embodiment of the present invention.
FIG. 5 is a cross-sectional view of a cylindrical body of a roll casing controlled pull-back safety syringe according to an embodiment of the present invention.
6 is a cross-sectional view taken along line 6-6 of FIG.
FIG. 7 is a top view of an outer roll casing of a roll casing controlled pull-back safety syringe according to one embodiment of the present invention.
FIG. 8 is a cross-sectional view of the outer roll casing of a roll casing controlled pull-back safety syringe according to one embodiment of the present invention.
FIG. 9 is a view showing an end surface of an outer roll casing of a roll casing controlled pull-back safety syringe according to an embodiment of the present invention.
10 is an enlarged cross-sectional view taken along line 10-10 in FIG.
FIG. 11 is a side view showing a needle seat of a roll casing controlled pull-back 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 controlled pull-back safety syringe according to an embodiment of the present invention.
FIG. 13 is a side view showing a push rod of a roll casing controlled pull-back 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 controlled pull-back safety syringe according to an embodiment of the present invention.
FIG. 15 is a combined three-dimensional view of a needle tube and an outer roll casing of a roll casing controlled pull-back safety syringe according to one embodiment of the present invention, showing a state where it is rotated and engaged.
FIG. 16 is a combined cross-sectional view of a roll casing controlled pull-back safety syringe according to one embodiment of the present invention, showing a state where a push rod is engaged after injection.
FIG. 17 is a combined three-dimensional view of a needle tube and an outer roll casing of a roll casing controlled pull-back safety syringe according to an embodiment of the present invention, showing a state in which it is rotated and unengaged.
FIG. 18 is a combined sectional view of a roll casing controlled pull-back safety syringe according to one embodiment of the present invention, showing a state where a push rod pulls back a needle seat.
FIG. 19 is an enlarged view of a part of FIG.
FIG. 20 is a combined sectional view of a roll casing controlled pull-back safety syringe according to one embodiment of the present invention, showing a state where the push rod has completely pulled back the needle seat.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Needle cylinder 11 Cylinder body 12 Accommodating hole 13 Claw piece 16 Positioning convex point 20 Outer roll casing 21 Ring body 22 Insertion hole 26 Relief hole 27 Positioning groove hole 30 Needle seat 31 Tube mounting part 37 Ring retaining groove 39 Infusion hole 40 Push rod 41 Rod body 42 Cutting portion 44 Locking hook 50 Push rod glue stopper 60 Injection needle 131 Chuck tooth 271 First hole 272 Second hole

Claims (4)

A needle cylinder having a straight cylindrical cylinder, through which the accommodation hole penetrates, at least one claw piece is installed at the front end of the cylindrical body, and forming chuck teeth at the inner edge;
A ring body having a circular shape, and having an axial insertion hole that can be inserted into the cylindrical body of the needle cylinder, and at least one escape hole is provided in a front stage of the ring body, and is different from the needle cylinder An outer roll casing that can be rotated to a position and positioned;
A needle seat that has a cylinder mounting portion that can slide inside the accommodation hole of the needle cylinder, a ring-closing groove is provided on the outer periphery, and an infusion hole passes through the center in the axial direction;
A push bar provided with a rod body having a cutting portion in a predetermined position, and a locking hook installed at the front end;
A push rod glue plug fitted into the front end of the push rod and closing the accommodation hole of the needle tube;
With
By positioning a predetermined first position of the needle cylinder by gyrating the outer roll casing, the chuck teeth of the needle cylinder is hooked to the stop ring groove of the needle seat,
The Rukoto said by gyrating the pre Kigai roll casing to a second position different from the first position逃孔to correspond to the claw piece of the needle cylinder, on the outer side of the claw piece is the逃孔 because the needle seat out Zhang can move without being restricted, roll casing controlled pullback safety syringe according to claim and pulling back was benzalkonium the needle by the push rod. 2. The roll casing controlled pull-back safety syringe according to claim 1, wherein the number of escape holes of the outer roll casing is three and is distributed at an equal angle in front of the ring body. . The needle cylinder further includes an outer ring groove on an outer periphery thereof, and the outer roll casing has an inner ring and is rotatable by being hooked on the outer ring groove of the needle cylinder. The roll casing controlled pullback safety syringe as described. The needle cylinder further includes a positioning convex point on the outer periphery, and the outer roll casing is formed by connecting a first hole, a second hole, and a through hole, and can be positioned by being fitted into the positioning convex point of the needle cylinder. The roll casing controlled pull-back safety syringe according to claim 1, further comprising a positioning groove.

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