KR19980014043A - SAFETY SYRINGE WITH RETRACTABLE SELF-BIASED NEEDLE AND WITHOUT PACKING RING WITH REMOVABLE AUTOMATICALLY UNAVAILABLE NEEDLE AND NO PACKING RING - Google Patents

Abstract

The safety syringe includes a piston biasing socket that is slidably supported in a straight line in the syringe for hollow needle scanning supported in a sleeve portion formed on the front of the syringe, and a biasing joining piston recessed into the needle back of the hollow needle The biasing socket is forced into engagement with the mating member when the piston is pressed against the needle to force the mating member into the biasing socket of the needle when the injection is finished, The needle automatically tilts to prevent the needle from stabbing the other.

The barbs of the handle of the hollow needle to be combined with the barb formed in the annular shape on the inner side of the sleeve part are prevented from protruding outwardly during the injection by the hollow needle formed in the annular shape and the needle is withdrawn into the injection syringe Gently release the hollow needle backward from the sleeve portion.

Description

Safety syringe with retractable automatic elliptical needle and no need for packing ring

Figure 1 is a drawing of the present invention prepared for scanning;

2 is a view showing the combination of the piston and the needle when the injection is finished;

FIG. 3 is a view showing that the needle enters the syringe of the present invention. FIG.

FIG. 4 shows the needle bending in the syringe according to the invention; FIG.

FIG. 5 is a view showing the needle of the present invention. FIG.

6 is a view showing an engaging member engaged with a rear portion of a needle according to the present invention.

7 shows a sloped needle when introduced into a syringe of the present invention; Fig.

FIG. 8 is a perspective view of the present invention before assembly; FIG.

FIG. 9 is a view showing an assembly state of the present invention. FIG.

10 is a sectional view taken along line 10- 10 of FIG. 2;

FIG. 11 shows the introduction of a needle into another embodiment of a syringe of the present invention. FIG.

FIG. 12 shows a needle which is bent in the injector of FIG. 11;

DESCRIPTION OF THE REFERENCE NUMERALS

1: syringe 2: needle 3: piston 4: liquid medicine 10: hollow part 11: syringe cylinder 12: sleeve part 14: syringe handle 15: sealing shoulder 16: annular extension 17: The present invention relates to a pneumatic tire for a motor vehicle which is provided with a piston and a piston, A needle bar is provided with a needle bar which is provided at a distal end of a syringe barrel of a syringe barrel.

US Patent No. 5,328, 475, issued to the same inventor of the same application, discloses that a needle coupled with a post-injection piston is introduced into the syringe cylinder, A safety syringe that will automatically tilt to prevent overhanging is described.

The grip portion of the prior art syringe is formed in a cylindrical shape and has a packing ring fixed on the handle portion and coupled with a ring groove introduced into the sleeve portion of the scanning means. When the piston is pressed forward for injection, the needle device is subjected to the pressure of the liquid medicine raised in the syringe cylinder and can be erroneously ejected to the paper side. Thus, the present inventor invented an apparatus for preventing unexpected needle ejection from a syringe during injection as follows. It is an object of the present invention to provide a hollow needle which is suitably supported in a sleeve portion formed on the front portion of a syringe, a suction tube which can be switched on the sleeve portion to suck liquid medicine from the ampoule into the syringe, And a coupling member in the piston which can be engaged with a biasing socket recessed in the back of the needle of the hollow needle, the safety syringe comprising: The biasing socket is forcedly engaged with the mating member and the needle introduced into the syringe protrudes outwardly to prevent other persons from being stuck when the needle is retracted into the syringe The coupling member can be coupled to the biasing socket, The needle is automatically tilted inward toward the blocking shoulder of the syringe when the needle is engaged by the aspiration and the hollow needle is brought into engagement with the annularly formed ratchet tooth on the inner surface of the sleeve portion A hollow needle having a barb in its handle that is barbed in the form of a loop, preventing the hollow needle from being ejected forward from the syringe during injection and gently releasing the hollow needle backward from the sleeve portion being retracted into the injection syringe.

As shown in the drawings, the present invention includes a syringe 1, a needle 2, and a piston 3. The syringe 1 has a hollow portion 10 defined in the syringe cylinder 11 for filling the liquid medicine 4 in the syringe cylinder 11 and also has a syringe shaft 11 A syringe cylinder 11 having a central opening 121 formed through the sleeve portion 12 and a branch pod 122 formed at the rear of the sleeve portion 12 adjacent the syringe cylinder 11, A syringe handle 14 formed on the rear end of the syringe cylinder 11, a hollow portion 10 of the syringe cylinder 11, and a sleeve portion 12 formed on the front portion of the syringe cylinder 11 contracted forward from the syringe cylinder 11, And an annular extension portion 16 formed annularly on the rear portion of the cylinder 11. The annular extension portion 16 is formed at the rear end of the sleeve portion 12 and at the rear end portion of the sleeve portion 12, , A plurality of longitudinal serrations (not shown) formed on the inner wall of the syringe cylinder 11, A barb 120 formed in an annular shape on the inner surface of the central opening 121 of the work extension 17 and the sleeve portion 12 and an inner conical portion 120 diverging forward from the barb 120 in the sleeve portion 12. [ And a sleeve portion 12 having an inclined surface 120a. In one preferred embodiment, the sleeve portion 12 is formed eccentrically on the forward side of the syringe cylinder 11 for intravenous injection.

The needle device 2 includes a needle part 21 having a needle tip 211 formed at the front end of the needle part 21, a bag part 22 connected to the needle part 21, A bifurcated groove 25 formed forward from the needle back end 230 and formed in a conical shape at the rear portion of the bag portion 22 and a guide portion A biasing socket 27 communicating with the needle bar 231 and a needle bar 200 vertically disposed at the center of the needle bar 2.

The bag portion 22 and the needle back end portion 230 are made of an elastic plastic material and the bag portion 22 of the needle device 2 has a bag portion The barbs which are engaged with the conical inclined surface 120a formed in the groove 26 and the sleeve portion 12 in the annular groove in the annular groove 22 are tapered around the rear portion on the sailportion 22, Shaped conical sloping surface 261.

When the needle device is fixed on the sleeve portion 12 of the syringe 1 for scanning, the needle shaft 200 becomes parallel to the syringe shaft 100.

The conical biasing socket 27 is perpendicular to the lower cone 271, the apex 272 tapered forward from the lower cone 271 and the lower cone 271, And is arranged at a conical apex 272 which is inclined outward from the needle axis 200 of the needle device 2 so as to define an acute angle A between the longitudinal pivots 270 of the socket 27, ). The pivot axis 270 is eccentrically displaced from the syringe axis 100 and intersects the syringe axis with an acute angle A as shown in FIGS. The biasing socket 27 is engaged with the piston means 3 and is inserted into the arrowhead portion of the piston means 3 in order to bias the needle device 2 obliquely when it enters the injection syringe cylinder 11 301, respectively.

The piston means 3 comprises a piston 31 which is slidably supported in the syringe cylinder 11 of the syringe means 1, a coupling member which can be inserted organically into the biasing socket 27 formed in the syringe means 2 A coupling member 30 in the coupling member request 34 in the piston 31 having a tongue shaped portion 301 properly formed on the front end of the sleeve portion 12 of the syringe means 1; The tongue portion 301 is configured to organically couple with the needle back end 230 when bifurcated by a tongue portion inserted into the biasing socket 27 by a needle back end 230 defined by the branch port 122. [ A gripping socket 32 centrally disposed about the tongue-like portion 301 to organically bond with the needle back end 230 when the tongue is split around the syringe cylinder 11 to limit retraction movement of the piston 31, A piston 31 engaging with an annular extension 16 formed in the rear portion of the piston 31, The piston rod 35 having the piston handle 37 protruding rearward from the piston 31 for the pressing operation of the piston 31 formed with the annular request 311 and the piston rod 35 projecting rearward from the needle shaft 200 of the needle device 2 Parallel to the tongue axis 301a of the tongue 301 and has a syringe axis 300 of the syringe means 11. In one preferred embodiment, the tongue-like portion 301 is formed eccentrically on the front end of the engaging member 30.

The coupling member 30 is conical and may be associated with a biasing socket 27 formed conically in the needle device 2 and may be coupled to the syringe shaft 100 and the piston shaft 300 A tongue portion 301 having a tongue axis 301a of the tongue portion 301 aligned with the needle axis 200 and a neck portion 302 connected to the tongue portion 301, A base portion 303 having a protrusion 304 annularly formed around the periphery of the base portion 303 to seal the base portion 303 well in the coupling member request 34 and a coupling member request 34 And a locking block portion 305 coupled with a secant request formed at the rear end of the locking block portion 305. [ The block portion 305 to be determined is fixed to the piston rod 35 of the piston means 3.

Since the piston 31 is not rotatable because it can be slidably connected to a plurality of longitudinal rail extensions 17 formed in the syringe cylinder 11, the piston knob 37 is shown in Figures 9, 9 for the linear movement of the piston means 3 in the syringe means 1 for precisely aligning the tongue portion 301 to the biasing socket 27 of the needle device 2 as shown in FIG. And a flat bottom portion 371 slidably placed on the plane F as it is. The defining block portion 305 associated with the determination request 341 implements a linear motion of the piston 31 in the syringe cylinder 11.

As shown in FIG. 1, when the present invention is used for injection, the needle device 2 positioned eccentrically for the purpose of the injection is inserted into the blood vessel of the patient and the piston 31 is pushed to push the cylinder 2 The drug loaded in the body 11 can be inserted into the patient's body.

The tongue portion 301 of the coupling member 30 is then inserted and tightened into the biasing socket 27 of the needle device 2 and the needle device 2 is inserted into the needle device 2 to store the elastic potential energy of the bifurcated needle back 2 to elastically couple the needle device 2 with the engaging member 30 as shown in FIGS. 2 and 6.

3, after the needle device 2 coupled with the piston 31 is introduced into the hollow portion 10 of the syringe cylinder 11, the biasing socket 27 of the needle device 2 is inserted into the hollow portion 10 of the needle cylinder 2, As shown in FIG. 2 and FIG. 6, when the biasing socket 27 and the tongue portion 301 are forcibly engaged, the elastic force accumulated on the needle back end portion 230 is deflected, 30 so that the needle device 2 connected to the piston 31 is automatically tilted so as to traverse the syringe barrel 100 as shown in Figures 7 and 3 So that the needle device 2 faces the sealed shoulder 15a.

The needle tip 211 is disturbed by the containment shoulder 15a formed on the front of the cylinder 11 (Fig. 4), and the needle is bent so that the needle protrudes outward Thereby preventing contamination of the surroundings or injuring nearby persons.

The present invention is much better than the U.S. Patent No. 5,328,475 to the inventor of the present application because it provides a stable engagement of the needle device 2 on the sleeve portion 12 for scanning.

When the liquid medicine 4 is injected into the syringe cylinder 11 by applying pressure to the needle device 2, the barbs 120 in the sleeve portion 12 of the syringe means 1 are pulled out of the bag 2 of the needle device 2 The needle bar 2 of the needle 22 is suspended from the sleeve portion 12 of the syringe means 1 to prevent the needle device 2 from being discharged outwardly and the needle device 2 connected to the post- The conical inclined surface 261 of the bag portion 22 of the needle device 2 is supported backward along the inner conical inclined surface 120a in the sleeve portion 12 when the container 2 is put back into the syringe cylinder 11 So that the needle device 2 is smoothly withdrawn into the syringe cylinder 11 for reliable withdrawal of the needle device 2. The slopes of the conical slopes 261 and 120a have a very small slope. On the other hand, it is made of a plastic material having elasticity for good packing or sealing to prevent liquid leakage between the sleeve part 12 and the needle device 2 and the sleeve part 12. [

Referring to FIGS. 11 and 12, see another withdrawal of a needle into a syringe according to the present invention. In this embodiment, the sleeve portion 12 is formed on the front side of the center portion of the syringe cylinder 11 and the tongue portion 301 of the tongue portion 301 of the piston 31 is engaged with the center front end portion Which can be organically inserted into the biasing socket 27 formed in the needle device 2. [

The present invention may be modified without departing from the concept and scope of the invention.

Claims (5)

A syringe having a retractable self-ballasting needle and no need for a packing ring, the safety syringe having a sleeve portion on the front of the syringe means with a central opening formed through a syringe cylinder sleeve portion for filling the liquid medicine, Wherein the safety syringe also includes a needle device, the needle device including a needle portion, a handle portion connected to the needle portion and supported by the sleeve portion, a handle portion formed vertically on the back of the handle portion, A biasing socket formed in a rear portion of the bore portion and cooperating with a guide port recessed from the rear end of the needle to the other, and a needle shaft vertically defined in a central portion of the needle device , The bag portion and the needle rear end portion are made of an elastic plastic material, Said safety syringe having piston means, said biasing socket having a longitudinal axially defined axis at the center of said needle device and angularly angularly outwardly inclined from a needle axis parallel to the axis of the syringe of said syringe means, The means may include a piston slidably supported within the syringe cylinder for filling the liquid medicine in the syringe cylinder for injection through the needle device and a biasing socket in the needle device, Wherein the needle assembly includes a coupling member embedded in a piston having a tongue-like portion on the front end of a coupling member that is organically forcefully inserted into the biasing socket to pivot the needle assembly coupled to the piston and piston into a syringe cylinder Automatically restored, and also tilted inwardly The needle device is prevented from being re-projected from the syringe means to the outside by intersecting the syringe shaft toward the containment shoulder of the fragrance cylinder. The improvement is that the barb of the needle device of the needle device, And a barb having a conical inclined surface circumferentially tapered around said bar toward said groove, said barb having a barb formed in the barb portion of said needle bar being engaged with said groove, and an inner side of a central opening of said sleeve portion Wherein the sleeve portion has an inner conical bevel which branches forward from the barb in the sleeve portion and can engage with a conical inclined surface of the bag portion of the needle device, The syringe device according to any one of the preceding claims, The barb prevents the needle device from being discharged from the sleeve portion of the syringe means to the front outside by delaying the barb of the bag portion of the needle device and preventing the needle device coupled with the piston from being pushed into the syringe cylinder Wherein a conical sloping surface of the bag portion of the needle device is supported rearward along the inner conical sloped surface in the sleeve portion for smooth retraction of the needle device into the syringe cylinder. The safety syringe according to claim 1, wherein the sleeve portion is eccentrically formed on a front portion of the syringe means, and the tongue portion is formed eccentrically on a front end of the connecting member. The safety syringe according to claim 1, wherein the sleeve portion is formed at the center of the syringe means, and the tongue-shaped portion is formed eccentrically at the central front end portion of the connecting member. 2. The safety syringe of claim 1, wherein the syringe means comprises a plurality of longitudinal rail extensions formed longitudinally inside the syringe cylinder for slidably coupling the piston in the syringe cylinder in a linear sliding manner. 2. The apparatus of claim 1, wherein the piston means comprises a syringe handle projecting rearwardly from a piston having a flat bottom surface formed on a syringe handle that is slidably movable on a plane, and a mating member is formed on the mating member And a determining block associated with the determining request coupled to the coupling member request, or a request to determine is formed in the piston to support the coupling member within the coupling member request, and when the piston is linearly moved in the syringe cylinder, Wherein the piston prevents rotation of the coupling between the biasing socket in the needle device and the tongue portion of the mating member.