KR101712624B1 - Safety syring - Google Patents

Abstract

Provided is a safety syringe. A safety syringe according to an embodiment of the present invention comprises: a cylinder; a holder member disposed in the inner front side of the cylinder to make a syringe needle coupled with the front thereof, and having a stopper member accommodation groove formed in the rear side thereof; a stopper member having a flow hole formed in the center thereof to flow an injection fed to the syringe needle, including an inner container unit formed on the inner circumferential surface of the flow hole to have a first hanging projection formed therein, and capable of being fixed to the rear of the holder member while the inner container unit is inserted in the stopper member accommodation groove; and a piston capable of being forwardly or backwardly moved in the cylinder, including an axial member capable of penetrating through the inner container unit, and including a hook unit formed on the outer circumferential part of the axial member and capable of being hung on the hanging projection of the stopper member. As the piston is backwardly moved, the stopper member can be backwardly moved along with the piston while the hook unit is hung on the first hanging projection of the stopper member. One side of the inner container unit of the backwardly moved stopper member can be hung on one inner side of the stopper member accommodation groove in a predetermined position, and the stopper member and the holder member can be backwardly moved along with the piston while one side of the stopper member is hung on one inner side of the stopper member accommodation groove.

Description

Safety syring {

The present invention relates to a safety syringe.

In general, a syringe is used to collect blood from a patient's blood vessel or to collect other body fluids in the body. On the other hand, it is used to inject drugs directly into the blood vessels or to inject drugs into the muscles or subcutaneously.

That is, the syringe can be used to collect body fluids in the body or to inject injections into the body.

On the other hand, in order to transfer the drug contained in the glass ampoule or the small glass bottle containing the rubber stopper into the syringe when the injection is injected into the body through the syringe, the upper part of the glass ampoule is cut and the injection needle I will inhale the drug to be injected.

The injection needle of the syringe thus used is covered with a protective cap and then discarded. At this time, a doctor or a nurse using a syringe is often stuck to the needle, and the protective cap on the needle is also separated during the disposal process of the syringe, so that the disposal operator is also stuck to the needle.

In this case, there is a second infectious problem when a syringe handler or a disposal handler is stabbed in an injection needle used for a patient having an infectious pathogen such as a patient of type B infection or AIDS.

In order to prevent this, a needle may be built into the cylinder. However, in order to embed the injection needle into the cylinder, the injection needle is moved into the cylinder by engaging the shaft member of the piston with the rear portion of the injection needle and pulling the piston backward.

At this time, in order to move the injection needle coupled into the cylinder with the shaft member of the piston and move the cylinder into the cylinder, a large amount of force is required to move the piston backward. And because there are many syringes that need to dispose of needles a day, it is necessary to construct a syringe that can dispose of needles without much effort.

An embodiment of the present invention provides a safety syringe capable of easily moving the injection needle into the cylinder.

According to an aspect of the present invention, there is provided an injection apparatus including: a cylinder to which a needle is inserted forward; A holder member disposed on an inner front side of the cylinder so as to be coupled with a needle on a front side and having a stopper member receiving groove formed on a rear side thereof; And an inner tubular portion formed at the center thereof with a flow hole through which the injection fluid flowing through the injection needle flows, and having a first engaging step formed on the inner circumferential surface of the flow hole, wherein the inner tubular portion is inserted into the stopper member receiving groove, A stopper member capable of being fixed to the rear of the member; And a hook portion formed on an outer peripheral portion of the shaft member so as to be caught by the first engaging jaw of the stopper member, Wherein the stopper member is moved rearward along with the piston in a state in which the hook is caught by the first engaging jaw of the stopper member as the piston is moved backward And one side of the inner cylinder portion of the stopper member moved rearward can be hooked to one side of the inside of the stopper member receiving groove at a predetermined position so that one side of the stopper member is located at an inner side of the stopper member receiving groove The stopper member and the holder member are moved rearward together with the piston The safety syringe is configured to be movable to the first position.

The holder member may include: a column portion in which a through hole through which the injection liquid is introduced is formed; An extending portion extending from the rear of the column portion to the stopper member side to be inserted into the flow hole so that the through hole communicates with the flow hole; And an outer tube portion spaced apart from the column portion and the extended portion so as to surround the column portion and the extended portion. The stopper member receiving groove may be formed between the outer tube portion and the extended portion.

In addition, a second latching jaw is formed at a rear inner side of the outer tubular portion so that one side of the inner tubular portion is engaged, and a first protruding portion engaged with the second latching jaw may protrude from a side of the inner tubular portion.

In addition, the second latching jaw may include an upper surface and a first side extending vertically at one end of the upper surface, wherein the upper surface and the first side have a first corner, Wherein the first projecting portion includes a lower surface and a second side extending vertically at one end of the lower surface and the lower surface and the second side are inclined to the side surface, May be inclined to the second side.

In addition, a plurality of first cut portions may be formed on the extended portion so as to be elastically deformed.

Also, the outer peripheral surface of the extended portion may be formed with an outer inclined surface such that the diameter is narrowed from front to rear.

The stopper member may include an outer cylinder surrounding the outer surface of the inner cylinder and spaced apart from the inner cylinder; And a ring portion in which the inner cylinder portion is provided on the inner side in a ring shape and the outer cylinder portion is provided on the outer side portion.

Further, the front surface of the ring portion is formed so as to be stepped so that the inner portion is higher than the outer portion, and the rear surface of the ring portion may be formed in a shape corresponding to the front surface of the piston.

A second protrusion may be formed on a front outer surface of the outer cylinder to be inserted into a groove formed in the cylinder so that the holder is not pushed rearward of the cylinder.

A plurality of second incisions may be formed in the inner tube to elastically deform the inner tube, and a plurality of third incisions may be formed in the outer tube such that the outer tube is elastically deformed. have.

The inner circumferential surface of the inner cylinder may have a first inner inclined surface inclined from the front to the rear and a second inner inclined surface inclined from the front to the inner circumferential surface of the outer cylinder.

A piston body having the shaft member on a front side thereof, the piston body being inserted into the cylinder and moving along the cylinder; And a gasket coupled to a front portion of the piston body and inserted to closely contact the inside of the cylinder, wherein the shaft member extends outward from an inner front surface of the gasket, and the hook portion provided on the outer peripheral portion of the shaft member And may be formed on the piston body so as to protrude forward of the gasket.

The shaft member may be inserted into the through hole of the column portion and extend forward of the hook portion so as to discharge the injection liquid remaining in the through hole to the outside.

The safety syringe according to the embodiment of the present invention moves the stopper member backward by pulling the piston backward so that one side of the stopper member is hooked to the rear side of the holder member, By distributing the force to move the holder member caught in the member into the cylinder, the force used by the user to move the injection needle into the cylinder can move the injection needle into the cylinder with less force than in the prior art.

Further, since the shaft member on which the piston is formed is formed so as to extend to a certain length and inserted into the holder member, the injection member can be discharged to the outside without remaining the injection solution.

1 is a perspective view illustrating a safety syringe according to an embodiment of the present invention.
2 is a cross-sectional view of a safety syringe according to an embodiment of the present invention.
3 is an exploded perspective view of a safety syringe according to an embodiment of the present invention.
4 is a perspective view illustrating a holder member in a safety syringe according to an embodiment of the present invention.
5 is a perspective view showing a cross section of a stopper member in a safety syringe according to an embodiment of the present invention.
6A and 6B are perspective views illustrating a piston in a safety syringe according to an embodiment of the present invention.
7A to 7C are cross-sectional views illustrating a method of operating a safety syringe according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

Hereinafter, a safety syringe according to an embodiment of the present invention will be described in detail with reference to the drawings. In order to facilitate the understanding of one embodiment of the present invention, the injection needle side of the safety syringe will be referred to as the front side and the piston side will be referred to as the rear side.

1 to 3, the safety syringe 100 according to one embodiment of the present invention may include a cylinder 110, a holder member 120, a stopper member 130, and a piston 140.

The cylinder 110 may have a hollow cylindrical shape so that the injection liquid can be stored therein. The holder member 120, the stopper member 130, and the piston 140 may be disposed in front of the cylinder 110.

4, the holder member 120 is disposed in front of the cylinder 110, and injects the injection liquid into the cylinder 110 through the injection needle or injects the injection liquid inside the cylinder 110 into the cylinder 110 3, 150). To this end, the holder member 120 includes a post 121, an extension 122,

When the holder member 120 is disposed in the inner front of the cylinder 110, the column portion 121 is formed to protrude forward of the cylinder 110 do. A through hole 124 through which the injection liquid flows is formed inside the column 121 and the front and rear of the through hole 124 communicate with the outside so as to discharge or flow the injection liquid. That is, the front side of the through hole 124 communicates with the outside, and the rear side of the through hole 124 communicates with the below-described flow hole 136.

The extension portion 122 extends from the rear end portion of the column portion 121 toward the stopper member 130 so that when the stopper member 130 described later is coupled to the rear side of the holder member 120, Is inserted into the flow hole (136) side of the stopper member (130).

The through hole 124 extends from the front side of the column 121 to the rear side of the extended portion 122 and communicates with the flow hole 136 of the stopper member 130.

In addition, the extension portion 122 may be formed to have a wide front side and a narrow rear side, for example, a hollow truncated conical shape. That is, the extension portion 122 has an external inclined surface 122a inclined from the front to the back.

A plurality of first cutouts 122b may be formed on the extension 122 so as to be elastically deformed outward.

Thus, when the holder member 120 is pushed rearward by the injection needle into the body of the patient, the extension part 122 is elastically deformed by the first incision part 122b, and the outer part of the outer surface of the extension part 122 The inclined surface 122a can push the stopper member 130, which will be described later, in the horizontal direction.

The outer tube portion 123 is disposed in a cylindrical shape to surround the outer periphery of the column portion 121 and the extended portion 122. The outer tube portion 123 is spaced apart from the column portion 121 and the extended portion 122 by a predetermined distance, And the outer periphery of the extension portion 122. [

A front part of the column 121 protrudes to the outside of the cylinder 110 and a front part of the outer part 123 is coupled to an inner front side of the cylinder 110.

A space 125 to which the needle hub is coupled is formed between the front side of the outer tubular portion 123 and the column portion 121. On the inner circumferential surface on the front side of the tubular outer tubular portion 123, The escape preventing portion 125a, to which the collar of the hub (151 in Fig. 3) is caught, is protruded obliquely. The collar 151 of the needle hub is rotated along the escape prevention portion 125a and is coupled to the space 125 of the outer tube portion 123 so that the needle hub is not released from the holder member 120 do.

A plurality of ribs 123a are provided along the vertical direction on the outer surface of the outer tube 123. The rib 123a is inserted into the rib groove on the inner side of the cylinder to prevent rotation.

An O-ring groove 126 may be formed at the center of the outer circumferential surface of the outer tube portion 123 to be recessed inward to seal the inside of the cylinder 110 and the outer circumferential surface of the holder member 120. Accordingly, the O-ring is provided in the O-ring groove 126, so that the holder member 120 can be tightly coupled to the inside of the cylinder 110.

On the other hand, a tapered portion 123b inclined from the outside to the inside is provided on the outer peripheral surface on the rear side of the outer tube portion 123, and the tapered portion 123b pushes the outer tube portion 132 of the stopper member 130 in the horizontal direction . A detailed description will be given later.

The stopper member 130 is inserted between the outer tube portion 123 and the extension portion 122. The inner tube portion 131 is inserted into the stopper member 130, Receiving grooves 127 are formed.

A second stopping hook 128 may be formed on the rear inner circumferential surface of the outer tubular portion 123 so that one end of the stopper member 130 is hooked when the stopper member 130 is moved rearward.

The second latching jaw 128 includes a top surface 128a and a first side 128b extending vertically at one end of the top surface 128a. At this time, the upper surface 128a is inclined to be inclined from the inner circumferential surface of the stopper member receiving groove 127 to the first side surface 128b, whereby the first corner 128b is formed between the upper surface 128a and the first side surface 128b, (128c) may be formed.

One side of the inner tubular portion 131 of the stopper member 130 is caught by the upper surface 128a and the first corner portion 128c of the second stopping jaw 128 by the second stopping jaw 128 having such a shape do.

5, the stopper member 130 is disposed on the rear side of the holder member 120 and has an outer peripheral surface of the stopper member 130 connected to the cylinder 110 to prevent the holder member 120 from being pushed rearward, As shown in Fig.

The stopper member 130 includes an inner cylinder 131, an outer cylinder 132, and a ring 133.

The inner tubular portion 131 extends vertically at an inner portion of the ring portion 133 and a first protruding portion 134 is formed at a front outer circumferential surface of the inner tubular portion 131 to engage with the second engaging shoulder 128. The first projection 134 includes a lower surface 134a and a second side 134b extending vertically at one end of the lower surface 134a and the lower surface 134a includes a lower surface 134a, And is inclined from the outer circumferential surface to the second side surface 134b so that the second corner portion 134c may be formed between the lower surface 134a and the second side surface 134b.

Here, when the stopper member 130 is moved rearward as the piston is moved rearward and is caught by the second latching jaw 128 on the rear side of the holder member 120, the second side surface 134b is engaged with the stopper member receiving groove The lower surface 134a abuts the upper surface 128a of the second stopping jaw 128 and the second side 128b of the second stopping jaw 128 abuts against the inner surface of the inner tubular portion 131 The stopper member 130 abuts against the outer circumferential surface and the first corner portion 128c supports the portion connected to the lower surface 134a from the outer circumferential surface of the inner tubular portion 131 so that the stopper member 130 is caught behind the outer tubular portion 123 .

The outer tubular portion 132 extends vertically at the outer portion of the ring portion 133, and the inner tubular portion 131 is disposed at the center.

That is, the outer cylinder portion 132 is disposed to surround the outer circumferential surface of the inner cylinder portion 131, and the outer cylinder portion 132 is provided at the outer portion of the ring portion 133 at a predetermined distance from the inner cylinder portion 131.

The outer cylinder 132 allows the stopper member 130 to be firmly coupled to the cylinder 110 in a state where the stopper member 130 is coupled to the rear side of the holder member 120. More specifically, a second projection 135 protrudes on the outer periphery of the front side of the outer cylinder 132, and the second projection 135 fits into a groove (111 in FIG. 7B) formed in the cylinder 110, So that the member 120 is prevented from being pushed to the rear of the cylinder 110.

The ring portion 133 is a ring-shaped bottom surface of the outer cylinder portion 132 and the inner cylinder portion 131, and the front surface of the ring portion 133 may be stepped from the outside to the inside. More specifically, the inner portion of the ring portion 133 provided with the inner cylinder portion 131 can be formed higher than the outer portion of the ring portion 133 provided with the outer cylinder portion 132.

The rear surface of the ring portion 133 is a portion where the front surface of the gasket 142 of the piston 140 contacts when the piston 140 is moved forward. The bottom surface of the ring portion 133 is formed to correspond to the shape of the front surface of the gasket 142 so that the gasket 142 comes into close contact with the bottom surface of the ring portion 133.

On the other hand, a flow hole 136 communicating with the through hole 124 is formed in the center of the ring portion 133 and the inner cylinder portion 131. That is, when the inner cylinder portion 131 is inserted into the stopper member receiving groove 127 of the holder member 120, the extension portion 122 is inserted into the flow hole 136, (130) may be combined.

A first stopping protrusion 137 is formed on the rear side of the flow hole 136 to hook the hook 145 of the piston 140. The first stopping protrusion 137 has a plurality of openings 136, And are spaced apart from each other by a predetermined distance. At this time, an insertion hole 138 communicating with the flow hole 136 and passing through the hook portion 145 is formed at the center of the plurality of first latching jaws 137.

In addition, the outer circumferential surface of the first latching jaw 137 is formed so as to have a larger diameter from the front to the rear, and the diameter of the insertion hole 138 is formed to be constant from the front to the rear.

The first hooking jaws 137 having such a configuration can be elastically deformed by disposing the first hooking jaws 137 at a distance from each other, so that the hooks 145 can be easily inserted into the flow holes 136.

Since the diameter of the hooking portion 145 also widens from the front to the rear, the diameter of the hooking portion 145 is smaller than the diameter of the hooking portion 137 The rear end of the wide hook portion 145 is hooked so that the hook portion 145 can be prevented from being detached to the rear side of the first hooking step 137. [

A plurality of second incisions 131a are formed in the inner tubular portion 131 of the stopper member 130 from the front to the back and a plurality of third incisions 131b are formed in the outer tubular portion 132, A portion 132a is formed. The second and third incisions 131a and 132a allow the inner tube 131 and the front end of the outer tube 132 to be resiliently deformed.

The inner circumferential surface of the inner tubular portion 131 is formed with a first inclined inner surface 131b inclined from the front to the rear and the inner circumferential surface of the outer tubular portion 132 is inclined from the front to the rear, (132b) is formed.

The first and second inner inclined surfaces 131b and 132b are inclined from the outer side to the inner side so that elastic deformation can be facilitated even with a small force and the holder member 120 and the stopper member 130 can be elastically deformed, It can be firmly coupled to the inside.

More specifically, the outer cylinder portion 132 of the stopper member 130 is in contact with the tapered portion 123b of the holder member 120, and the inner cylinder portion 131 is inserted into the stopper member receiving groove 127, When the holder member 120 is urged backward as in the case where the injection needle enters the body of the patient, the outer inclined surface of the extension portion 122 (the inner surface of the extension member 122) 122a push the first inner inclined surface 131b of the inner tubular portion 131 and the second inner inclined surface 132b of the outer tubular portion 132 push the force of the inner tubular portion 131 pushed by the extended portion 122 And the tapered portion 123b of the holder member 120 are subjected to a pushing force.

The first inner inclined surface 131b of the inner tubular portion 131 pushes the tapered portion 123b of the holder member 120 in the horizontal direction by the extended portion of the holder member 120, The second inner inclined surface 132b of the outer tubular portion 132 is pressed against the wall surface of the cylinder 110 by a force acting on the tapered portion 123b and a force on the horizontal direction side.

As a result, the stopper member 130 is more strongly in contact with the wall surface of the cylinder 110, and the more the stopper member 130 is pushed, the more firmly the stopper member 130 is positioned.

The piston 140 may be disposed on the rear side of the cylinder 110 so as to discharge the injection liquid from the cylinder 110 to the outside or to inject the injection liquid from the outside into the cylinder 110. [ Quot;) < / RTI >

6A and 6B, the piston 140 includes a piston body 141 and a gasket 142. A shaft member 143 and a fastening member 144 are provided at the front end of the piston body 141 And the piston 140 is assembled with the gasket 142 by the shaft member 143 and the fastening member 144.

The fastening member 144 may protrude in the radial direction from the front of the piston body 141 and may have a plurality of fastening members 144 and may be spaced apart in the extending direction of the piston body 141.

The shaft member 143 extends from the front end of the fastening member 144 and includes a hook portion 145 that can be engaged with the first stopping jaw 137 of the stopper member 130. At this time, the hook portion 145 is formed on the outer peripheral portion of the shaft member 143 and protrudes to the front surface of the gasket 142.

The shaft member 143 can be extended to a predetermined length so that the injection liquid does not remain in the through hole 124 of the column 121 but can be discharged to the outside.

That is, the shaft member 143 may be formed to have a length that protrudes from the front end of the fastening member 144 to the front surface of the gasket 142 and can be inserted into the through hole 124 of the post 121, The shaft member 143 is formed on the outer circumferential portion of the shaft member 143 so as to contact the front end surface of the gasket 142.

The gasket 142 coupled to the piston body 141 by the fastening member 144 and the shaft member 143 is made of a flexible material and assembled to the front end portion of the piston 140 to be in close contact with the wall surface of the cylinder 110 The pressure can be applied to the injection liquid.

A method of operating the safety syringe 100 having such a configuration will be described below.

When the user pushes the piston 140 forward, the injection liquid which has flowed into the cylinder 110 is discharged to the outside through the through hole 124 of the holder member 120. At this time, the injection liquid may remain in the through hole 124 of the columnar portion 121 protruding forward of the cylinder 110 without being discharged to the outside.

The user then pushes the piston 140 a little further forward so that the shaft member 143 extending forward of the gasket 142 passes through the flow hole 136 of the stopper member 130 and passes through the holder member 120 And is inserted into the hole 124. Therefore, the injection liquid remaining in the through hole 124 can escape to the outside by the shaft member 143 inserted into the through hole 124.

The safety syringe 100, which discharges the injection liquid to the outside, may introduce the injection needle into the cylinder 110 to prevent reuse.

7A, the safety syringe 100, which discharges the entire injection liquid, is in a state in which the piston 140 is positioned in front of the cylinder 110, and in particular, the gasket 142 is disposed in the rear of the stopper member 130 As shown in Fig.

When the piston 140 is pushed further forward with the gasket 142 being in close contact with the rear of the stopper member 130, the gasket 142 can not advance further but the piston body 141 is further advanced. At this time, as the piston body 141 advances, the shaft member 143 sequentially passes through the stopper member 130 and the holder member 120, so that the user can feel the pressure change by hand.

The hook portion 145 is inserted into the flow hole 136 of the stopper member 130 to be caught by the first stopping protrusion 137 when the piston body 141 advances to the maximum extent.

When the piston 140 is moved backward, the state shown in Fig. 7B is obtained. That is, since the hook portion 145 of the piston 140 is engaged with the first stopping protrusion 137, the stopper member 130 is moved to the rear of the cylinder 110 as the piston 140 is moved rearward do.

Since the outer tubular portion 132 of the stopper member 130 can be easily elastically deformed by the plurality of third incisions 132a and the second inner inclined surfaces 132b, The second projecting portion 135 is separated from the groove portion in the cylinder 110. As a result, the outer end portion of the outer cylinder portion of the stopper member 130 is forced to move inward, And can be moved backward together with the piston 140.

At this time, as the stopper member 130 and the piston 140 move backward, the first projecting portion 134 of the inner cylinder portion 131 of the stopper member 130 contacts the second engaging jaw (not shown) of the holder member 120 128). That is, the stopper member 130 and the piston 140 are moved backward by an interval d in which the first projection 134 moves rearward to catch the second stopper 128 .

Finally, when the piston 140 is further retracted, the state shown in FIG. 7C is obtained. That is, since the hook portion 145 is engaged with the first stopping protrusion 137 and the first protrusion 134 is caught by the second stopping protrusion 128 of the holder member 120, The member 120 and the stopper member 130 are all moved rearward along the piston 140. Then, when the cutting groove 146 of the piston 140 is seen outside the cylinder 110, it is cut and discarded.

Accordingly, the safety syringe according to the embodiment of the present invention moves the stopper member backward by pulling the piston backward so that one side of the stopper member is hooked to the rear side of the holder member, and once again pulling the piston backward, By moving the holder member caught in the stopper member and the holder member to move the cylinder into the cylinder, the force used to move the needle into the cylinder by dispersing the force to disperse the force of the user and move the needle into the cylinder The needle can be moved into the cylinder with less force than in the prior art.

Further, since the shaft member on which the piston is formed is formed so as to extend to a certain length and inserted into the holder member, the injection member can be discharged to the outside without remaining the injection solution.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: safety syringe 110: cylinder
120: holder member 121:
122: extension part 123: outer part
124: through hole 125: space
126: O-ring groove 127: Stopper member receiving groove
128: second stopping jaw 130: stopper member
131: inner tubular portion 132: outer tubular portion
133: ring part 134: first protrusion
135: second protrusion 136: flow hole
137: first stopping jaw 140: piston
141: piston body 142: gasket
143: shaft member 144: fastening member
145:

Claims (13)

cylinder;
A holder member disposed on an inner front side of the cylinder so as to be coupled with a needle on a front side and having a stopper member receiving groove formed on a rear side thereof;
And an inner tubular portion formed at the center thereof with a flow hole through which the injection fluid flowing through the injection needle flows, and having a first engaging step formed on the inner circumferential surface of the flow hole, wherein the inner tubular portion is inserted into the stopper member receiving groove, A stopper member capable of being fixed to the rear of the member; And
And a hook portion formed on an outer peripheral portion of the shaft member so as to be caught by the first engaging jaw of the stopper member, And a piston,
The stopper member is formed to be movable rearward together with the piston in a state in which the hook portion is caught by the first stopping member of the stopper member as the piston is moved backward, Wherein one end of the stopper member is engaged with one side of the stopper member receiving groove so that one end of the stopper member is engaged with the other end of the stopper member receiving groove, And a member is formed movably rearward with the piston. The method according to claim 1,
The holder member
A column portion in which a through hole through which the injection liquid flows is formed;
An extending portion extending from the rear of the column portion to the stopper member side to be inserted into the flow hole so that the through hole communicates with the flow hole; And
And an outer tube portion spaced apart from the column portion and the extended portion so as to surround the column portion and the extended portion,
Wherein the stopper member receiving groove is formed between the outer tube portion and the extending portion. 3. The method of claim 2,
A second latching jaw is formed on the rear inner side of the outer tubular portion so that one side of the inner tubular portion is engaged,
And a first projection protruding from the second latching protrusion protrudes from one side of the inner cylinder. The method of claim 3,
Wherein the second jaw comprises a top surface and a first side extending vertically at one end of the top surface, the top surface having a first edge and the first side having a first edge, Is inclined,
Wherein the first projection includes a lower surface and a second side extending vertically at one end of the lower surface and the lower surface tilts to the second side such that the lower surface and the second side have a second edge, The safety syringe being configured to receive the syringe. 3. The method of claim 2,
And a plurality of first incisions are formed in the extended portion so as to be elastically deformed. 3. The method of claim 2,
Wherein the outer peripheral surface of the extended portion has an outer inclined surface formed so as to be narrowed in diameter from front to back. 3. The method of claim 2,
The stopper member
An outer cylinder surrounding the outer surface of the inner cylinder and spaced apart from the inner cylinder; And
And a ring portion having a ring-shaped inner side portion provided with the inner cylinder portion and an outer side portion provided with the outer cylinder portion. 8. The method of claim 7,
Wherein a front surface of the ring portion is formed so as to be stepped such that an inner portion thereof is higher than an outer portion thereof, and a rear surface of the ring portion is formed in a shape corresponding to a front surface of the piston. 8. The method of claim 7,
And a second protrusion inserted into a groove formed in the cylinder is formed on a front outer surface of the outer cylinder so that the holder member is not pushed rearward of the cylinder. 8. The method of claim 7,
Wherein a plurality of second incisions are formed in the inner tube to elastically deform the inner tube, and a plurality of third incisions are formed in the outer tube such that the outer tube is elastically deformed. 8. The method of claim 7,
Wherein the inner circumferential surface of the inner cylinder is formed with a first inner inclined surface inclined from front to back and a second inner inclined surface inclined from the front to the rear of the inner circumferential surface of the outer cylinder is formed. 3. The method of claim 2,
The piston
A piston body having the shaft member at a front side thereof, the piston body being inserted into the cylinder and moving along the cylinder; And
And a gasket coupled to the front of the piston body to be inserted into the cylinder so as to be closely contacted with the inside of the cylinder,
Wherein the shaft member extends outwardly from an inner front surface of the gasket, and the hook portion provided on the outer peripheral portion of the shaft member is formed on the piston body so as to protrude forward of the gasket. 13. The method of claim 12,
Wherein the shaft member is inserted into the through hole of the column portion and extends forward of the hook portion so as to discharge the injection liquid remaining in the through hole to the outside.

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