WO2016186256A1

WO2016186256A1 - Syringe assembly

Info

Publication number: WO2016186256A1
Application number: PCT/KR2015/009363
Authority: WO
Inventors: 박경택
Original assignee: 주식회사 세이퍼위드
Priority date: 2015-05-21
Filing date: 2015-09-04
Publication date: 2016-11-24

Abstract

A syringe assembly is disclosed. The syringe assembly according to the present invention comprises: a syringe body comprising a body configured such that a piston, which is inserted therein, moves in the forward/backward direction, and an injection portion configured on the front side of the body to have a diameter smaller than that of the body; a needle assembly comprising a hub, which is coupled to the injection portion, and a needle, which protrudes from the hub to be elongated forwards; and a protective cover coupled to the injection portion or to the hub so as to surround the needle, wherein one of the injection portion and the hub has a first fastening protrusion formed thereon, and the other has a first fastening groove formed thereon such that the first fastening protrusion is inserted therein and engages therewith, and, while the first fastening protrusion is inserted into the first fastening groove, the hub is prevented from moving forwards relative to the injection portion.

Description

Syringe assembly

The present invention relates to a syringe assembly, and more particularly, to a syringe assembly that is easy to store and use as a disposable syringe and prevents reuse.

Conventionally, a problem of separating the needle portion and the syringe body from each other has often occurred when using a syringe, which is mainly caused by the leakage of the needle protection cap in the process of separating the needle portion or injecting a slime drug.

In order to compensate for this, a product called Luer Lock (screw method using needle hub blades) has been developed, and a product called Loxy Lock (similar to Lock Syringe, Luer Lock type) has been developed in Korea. .

However, Luer Lock type and Lock Syringe have relatively low price competitiveness due to the complicated mold and production method compared to conventional syringes (Luer Slip of simple assembly type) because there are threads in the product. . Since the syringe market is a market where mass production through automation is essential, it is necessary to develop technology to improve it.

And the two products are made to be removable in consideration of the user convenience at the time of development, this structure is a disadvantage in terms of preventing reuse. Meanwhile, in February 2015, WHO launched the Global Injection Safety Campaign, in which safety syringes were used as devices with AD (Auto Disable), Reuse Prevention (RUP), and Sharp Injury Protection (SIP). We have initiated a recommendation campaign for the transition from conventional syringes to the use of safety syringes.

Regarding a syringe made of a screw coupling method, Korean Patent No. 10-1228585 discloses a "disposable syringe", and specifically, an injection needle that is fitted to the outer fastening portion and the chemical injection hole formed at the outer circumference of the injection hole of the medicine solution The inner fastening portion is formed at the inner circumference of the connecting cock to connect the connecting cock of the needle coupled to the syringe and the medicine injection hole by screwing, so that the needle is injected during the preparation or injection process. Eliminate the inconvenience caused when fixed to the barrel, and the outer tapered portion formed on the outer circumference of the chemical injection hole during injection, the inner tapered portions formed on the inner circumference of the connecting cock of the needle in close contact with each other, leakage of the chemical liquid between the connecting portion of the double member It can be prevented from being described.

However, as in the syringe disclosed in Korean Patent No. 10-1228585, when the needle and the chemical inlet are screwed, the user can easily separate the needle and the chemical inlet when necessary, and the needle or syringe It is vulnerable to prevention of reuse.

In addition, when an external force is applied to the screwed portion, the needle may be unintentionally separated from the chemical inlet or the coupling may be loosened, which may interfere with the use of the syringe or cause a risk.

On the other hand, the injection can be divided into muscle injection, blood vessel injection, epidermal injection, etc. according to the site to be treated, it is common to use each standardized injection needle for injection for the purpose, but recently exposure length of injection needle Forms are introduced that allow one syringe to be used in a variety of procedures by allowing the to

However, it is still necessary to develop a syringe that harmonizes the reuse of the needle and adjusts the exposure length of the needle. In particular, it is necessary to develop a syringe that can effectively prevent the unintentional change of the exposure length of the needle.

SUMMARY OF THE INVENTION An object of the present invention is to provide a syringe assembly, which is competitive in production and price, can solve the problem of separation between the syringe body portion and the needle portion, prevent reuse, and facilitate the adjustment of the exposure length of the injection needle.

The object includes a syringe body including a body made to move the piston inserted in the front and rear direction and the injection portion made smaller in diameter than the body in front of the body; A needle assembly including a hub coupled to the injection unit and a needle protruding forward from the hub; A rear cap formed in a cylindrical shape to surround a portion of the needle and coupled to the injection portion or the hub; And a front cap formed in a cylindrical shape to surround a portion of the needle and coupled to the rear cap to slide in the front and rear directions, and move in the circumferential direction to prevent movement in the front and rear directions. Achieved by the assembly.

The front end of the needle is located in front of the front cap front when the front cap is moved backwards with respect to the rear cap, and the front end of the needle is rearward of the front cap front when the front cap is moved forward to the rear cap. It can be made to be located.

At least one guide groove forming a path is formed on an outer circumferential surface of the rear cap, and a slider is inserted into the guide groove and moves along the guide groove on an inner circumferential surface of the front cap. A first path formed along the length of time; A second path extending along the circumferential direction of the rear cap at a rear end of the first path; And a third path extending along the circumferential direction of the rear cap at the front end of the first path.

The guide groove may be formed between the second path and the third path, and may include a fourth path extending along the circumferential direction of the rear cap in the first path.

At least two fourth paths may be provided and spaced apart from each other.

The extension directions of the different fourth paths may be different.

At least one guide groove forming a path is formed on the inner circumferential surface of the front cap, and a slider which is inserted into the guide groove and moves along the guide groove is formed on the outer circumferential surface of the rear cap, wherein the guide groove is in the front-rear direction. A first path formed along the length of time; A second path extending along the circumferential direction of the rear cap at a rear end of the first path; And a third path extending along the circumferential direction of the rear cap at the front end of the first path.

An outer circumferential surface of the rear cap may be formed on an extension line of the third path to form a locking groove into which the slider is inserted and a locking step provided between the third path and the locking groove.

The rear cap and the front cap may be formed such that an indicator is formed so that the front cap rotates along the circumferential direction of the rear cap to check whether the slider is inserted into the locking groove.

The rear cap has a locking protrusion protruding in the direction of reducing the width of the guide groove on the second path, the third path, or the fourth path, and the slider passes over the locking protrusion to the second path and the third path. It can be made to stay on the path or the fourth path.

The rear cap is provided with a fixing protrusion protruding in a direction of reducing the width of the guide groove on the second path or the third path, the protruding direction of which is opposite to the locking protrusion, and the fixing protrusion being formed of the first protrusion rather than the locking protrusion. 1 may be located far from the path.

The rear cap and the front cap may be formed such that an indicator is formed so that the front cap rotates along the circumferential direction of the rear cap to determine whether the slider is inserted between the locking protrusion and the fixing protrusion.

At least one of the injection part and the hub is formed with a first fastening protrusion and the other is formed with a first fastening groove into which the first fastening protrusion is inserted, and the first fastening protrusion is inserted into the first fastening groove. In this state, the hub may be configured to prevent movement forward toward the injection unit.

The first fastening protrusion protrudes from an outer circumferential surface of the injection part, but is firstly bent or bent at a rear end of the first inclined surface and protrudes outwardly toward the rear side to form a surface perpendicular to the front-back direction. The first fastening groove may be formed on the inner circumferential surface of the hub, and may have a longitudinal cross-sectional shape coinciding with a longitudinal cross-sectional shape of the first fastening protrusion.

The first fastening protrusion may be formed on the whole or part of the outer peripheral surface of the injection portion.

One of the hub and the rear cap is formed with a second fastening protrusion, and the other is formed with a second fastening groove into which the second fastening protrusion is inserted, and the second fastening protrusion is inserted into the second fastening groove. In the state that the rear cap may be made to prevent the movement forward to the hub.

The second fastening protrusion protrudes from the outer circumferential surface of the hub, but the second locking surface further protrudes outward toward the rear side and the second locking surface that is bent or bent at the rear end of the second inclined surface to form a surface orthogonal to the front-back direction. It includes, the second fastening groove is formed on the inner circumferential surface of the protective cover may be made so that the longitudinal cross-sectional shape and the longitudinal cross-sectional shape of the second fastening protrusion.

The second fastening protrusion may be formed on the whole or part of the outer peripheral surface of the hub.

The rear cap or the front cap may be formed such that an indicator is formed so that the front cap rotates along the circumferential direction of the rear cap to check the exposure length of the needle when the slider is inserted into the fourth path. .

According to the present invention, by using the protective cover consisting of the rear cap and the front cap, the safe and easy processing is achieved during storage, use and disposal of the syringe assembly, as well as adjusting the fixing position of the front cap against the rear cap needle The exposure length of the needle can be easily adjusted and unintentionally prevented from varying the exposure length of the needle, to limit the separation of the needle assembly from the syringe body, and also to limit the separation between the needle assembly and the protective cover, Reuse of the syringe body or needle assembly can be effectively prevented.

1 is a perspective view showing a syringe assembly according to an embodiment of the present invention,

FIG. 2 is an exploded perspective view of the syringe assembly shown in FIG. 1;

3 is a cross-sectional view of the syringe assembly shown in FIG. 1;

4 to 6 is a view showing the operation of the protective cover in the syringe assembly according to the present invention.

Explanation of symbols on main parts of drawing

1 syringe assembly 100 syringe body

110: body 120: injection portion

121: first fastening protrusion 121a: first inclined surface

121b: first locking surface 200: needle assembly

210: hub 211: first fastening groove

211a: first corresponding slope 211b: first corresponding engagement surface

212: second fastening protrusion 212a: second inclined surface

212b: second engagement surface 220: needle

300: protective cover 310: rear cap

311: 2nd fastening groove 311a: 2nd corresponding inclined surface

311b: second corresponding engaging surface 312: rear wall

312a: Through hole 313: Guide groove

313a: first path 313b: second path

313c: third route 313d: fourth route

314: locking groove 315: locking jaw

316a: Lock mark 316b: Safety mark

316c: Neutral mark 317: Jamming protrusion

318: fixing protrusion 319: indicator

320: front cap 321: front wall

321a: withdrawal hole 322: slider

323 reference point 324 adjustment protrusion

325: Indicator

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in describing the present invention, descriptions of already known functions or configurations will be omitted to clarify the gist of the present invention.

1 is a perspective view showing a syringe assembly 1 according to an embodiment of the present invention, Figure 2 is an exploded perspective view showing the syringe assembly 1 shown in Figure 1, Figure 3 is shown in Figure 1 4 is a cross-sectional view illustrating the syringe assembly 1, and FIGS. 4 to 6 are views illustrating an operation process of the protective cover 300 in the syringe assembly 1 according to the present invention.

In particular, (B) in Figure 2 is a view showing an enlarged portion of the guide groove 313 of (A), in Figure 3 (B) and (C) is the injection portion 120, the hub ( 210 and the rear cap 310 in order to explain the coupling relationship to illustrate them, Figure 4 (C) and (D) is shown in front of the front cap 320 in cross-sectional form for convenience of description. It was.

The syringe assembly 1 according to the present invention comprises a syringe body 100, a needle assembly 200 and a protective cover 300. Hereinafter, in describing the syringe assembly 1 according to the present invention, the needle assembly 200 is formed on the side where the front syringe body 100 is formed to be set to the rear.

The syringe body 100 is generally divided into a body 110 and an injection part 120 while being formed in a cylindrical shape, and may be made of synthetic resin such as polypropylene and polyethylene.

The body 110 is formed in a cylindrical shape and the injection liquid is stored therein, and the piston is inserted into the body 110 to move in the front and rear direction X, while the injection liquid is introduced into the body 110 or inside the body 110. Allow the injection to flow out.

The cross-sectional shape and the inner diameter of the body 110 is preferably made constant along the front and rear directions (X), and at least within the range in which the piston moves in the front and rear directions (X).

The injection unit 120 forms an entrance to the injection liquid into the body 110 and has a diameter smaller than that of the body 110 in front of the body 110.

The inner diameter of the injection unit 120 may be made constant along the front and rear direction (X), the outer diameter of the injection unit 120 may be made in a form that the diameter decreases as it is constant or forward in the front and rear direction (X). have.

The needle assembly 200 includes a hub 210 and a needle 220.

The needle 220 is thin and long to form a path through which the injection liquid in the body 110 is injected into the body by penetrating the skin, and may be made of metal or synthetic resin.

The hub 210 allows the needle assembly 200 to be stabilized and fixed to the syringe body 100, and is coupled to the injection unit 120 so that the inside of the body 110 and the needle 220 communicate with each other.

The hub 210 is generally formed in a cylindrical shape, and is preferably coupled to the injection part 120 as a shape surrounding the injection part 120, and the hub 210 may also be made of synthetic resin such as polypropylene and polyethylene. .

The inner diameter of the hub 210 is formed to have a shape and size corresponding to the outer diameter of the injection unit 120, the inner diameter of the hub 210 when the outer diameter of the injection unit 120 is made constant along the front and rear direction (X). In addition, if the constant diameter is made along the front and rear direction (X), the diameter of the injection portion 120 toward the front is made in the form that the diameter decreases as the inner diameter of the hub 210 also toward the front Can be done.

In the syringe assembly 1 according to the present invention, the hub 210 and the injection unit 120 are not simply interfitted with each other, the hub 210 is coupled to the injection unit 120 is not easy to be separated after being made For this purpose, a first fastening protrusion 121 is formed in one of the injection part 120 and the hub 210, and a first fastening groove 211 into which the first fastening protrusion 121 is inserted is formed in the other. .

Preferably, in a state where the first fastening protrusion 121 is inserted into the first fastening groove 211, the hub 210 is prevented from moving forward with respect to the injection part 120.

More specifically, the first fastening protrusion 121 is formed in the injection portion 120 and the first fastening groove 211 is preferably formed in the hub 210, wherein the first fastening protrusion 121 is injected From the outer circumferential surface of the part 120 toward the rear side, the first inclined surface 121a protruding outwardly and the back end of the first inclined surface 121a are bent (see FIG. 3 (B)) or bent (see FIG. 3 (C)). ) Includes a first locking surface 121b forming a surface orthogonal to the front and rear direction X, and the first locking groove 211 is formed on the inner circumferential surface of the hub 210, and the shape of the longitudinal cross-section of the first locking protrusion 121 is extended. It is preferably made to match the longitudinal cross-sectional shape of. That is, the first corresponding inclined surface 211a corresponding to the first inclined surface 121a and the first corresponding engaging surface 211b corresponding to the first engaging surface 121b are also formed in the first fastening groove 211.

When the first locking surface 121b is bent from the first inclined surface 121a, the connection surface between the first locking surface 121b and the first inclined surface 121a forms a curved surface. In this case, the injection surface is formed by injection molding. When the molding of the first fastening protrusion 121 has an advantage that it is easy to detach from the mold. The curved surface treatment may be similarly applied to the first fastening groove 211, the second fastening protrusion 212, and the second fastening groove 311.

The first fastening protrusion 121 has a constant cross section along the circumferential direction at the outer circumferential surface of the injection unit 120, and the first fastening groove 211 also has a constant cross section along the circumferential direction at the inner circumferential surface of the hub 210. Is done.

The first fastening protrusion 121 may be formed over the entire circumferential direction at the outer circumferential surface of the injection part 120, or may be formed at a portion of the circumferential direction. The first fastening groove 211 may also be formed in the entire circumferential direction on the inner circumferential surface of the hub 210 or may be formed in a part of the circumferential direction.

The hub 210 and the injection part 120 are separated from each other so that the front end of the injection part 120 is inserted into the rear end of the hub 210 while the hub 210 is placed in front of the injection part 120. When combined, the first end of the inner circumferential surface of the hub 210 moves on the first inclined surface 121a of the first fastening protrusion 121, and then the first fastening protrusion 121 of the injection part 120 moves to the hub 210. Pressed while being in close contact with the inner circumferential surface (the first fastening protrusion 121 is elastically deformed and compressed, the hub 210 may be elastically deformed and stretched), the first fastening protrusion 121 is the first fastening groove ( When moved to 211, the first fastening protrusion 121 is elastically recovered while being inserted into the first fastening groove 211. At this time, the first inclined surface 121a is in close contact with the first corresponding inclined surface 211a and the first locking surface. 121b is in close contact with the first corresponding engaging surface 211b.

When the hub 210 and the injection unit 120 are coupled to each other, when an external force that pulls the hub 210 forward against the injection unit 120 acts, the first locking surface 121b and the first corresponding engagement are engaged. The surface 211b is held in a mutually held state, and in particular, the first locking surface 121b and the first corresponding engaging surface 211b are formed in a direction orthogonal to the front-back direction X to exert a strong resistance to external force. Will be.

As such, in the syringe assembly 1 according to the present invention, the separation of the syringe body 100 and the needle assembly 200 by the first fastening protrusion 121 and the first fastening groove 211 can be easily performed while effectively separating. It is possible to prevent, and eventually it is possible to effectively prevent the reuse of the syringe body 100 or the needle assembly 200.

The protective cover 300 is formed in a generally cylindrical shape to surround the needle 220 and to be coupled to the injection unit 120 or the hub 210.

In the syringe assembly 1 according to the present invention, the protective cover 300 is divided into a rear cap 310 and a front cap 320, and the protective cover 300 is separated from the needle assembly 200 or the syringe body 100. In this state, the needle 220 may be exposed or shielded.

On the other hand, in Figures 1 to 4, the protective cover 300 is shown in the form of being coupled to the hub 210 of the needle assembly 200, but is not necessarily made in this way, the rear cap 310 is a needle It may be made integral with the hub 210 of the assembly 200. As such, when the rear cap 310 is integrally formed with the hub 210, the second fastening protrusion 212 and the second fastening groove 311, which will be described later, are not formed.

Hereinafter, the protective cover 300 will be described with reference to the form that is separated from the hub 210 of the needle assembly 200.

The rear cap 310 is formed in a generally cylindrical shape, it is preferable to be coupled to the hub 210 in a shape surrounding the hub 210, the rear cap 310 may also be made of synthetic resin, such as polypropylene, polyethylene, etc. .

The rear cap 310 is formed to surround a part of the needle 220 in the longitudinal direction, and thus the length of the front and rear direction X of the rear cap 310 is shorter than the length of the needle 220. A rear wall 312 is formed at the front end of the rear cap 310, and a through hole 312a formed through the rear wall 312 is provided, and a needle is formed through the through hole 312a of the rear wall 312. 220 may move.

The inner diameter (particularly the rear portion) of the rear cap 310 is formed to have a shape and size corresponding to the outer diameter of the hub 210, and the rear when the outer diameter of the hub 210 is constant along the front and rear directions (X) The inner diameter of the cap 310 is also made constant along the front and rear direction (X), when the outer diameter of the hub 210 toward the front is made in a form that the diameter is reduced as the inner diameter of the rear cap 310 also toward the front It may be made in the form of reducing the diameter.

The rear cap 310 and the hub 210 are not simply forcibly interfitted with each other, and the rear cap 310 is coupled to the hub 210 so as not to be easily separated, and for this purpose, the hub 210 and the rear cap ( The second fastening protrusion 212 is formed in one of the 310 and the second fastening groove 311 into which the second fastening protrusion 212 is inserted.

And in the state that the second fastening protrusion 212 is inserted into the second fastening groove 311, the rear cap 310 is made to be prevented from moving forward with respect to the hub (210).

More specifically, the second fastening protrusion 212 is formed in the hub 210 and the second fastening groove 311 is preferably formed in the rear cap 310, wherein the second fastening protrusion 212 is the hub (210) Bending at the rear end of the second inclined surface 212a and the second inclined surface 212a and protruding further toward the rear from the outer peripheral surface (see FIG. 3 (B)) or bent (see FIG. 3 (C)) And a second locking surface 212b that forms a surface orthogonal to the front and rear direction X, and the second locking groove 311 is formed on the inner circumferential surface of the rear cap 310, and the shape of the longitudinal cross-section thereof is the second locking protrusion 212. It is preferably made to match the longitudinal cross-sectional shape of. That is, in the second fastening groove 311, a second corresponding inclined surface 311a corresponding to the second inclined surface 212a and a second corresponding engaging surface 311b corresponding to the second locking surface 212b are formed.

The second fastening protrusion 212 has a constant cross section along the circumferential direction at the outer circumferential surface of the hub 210, and the second fastening groove 311 also has a constant cross section along the circumferential direction at the inner circumferential surface of the rear cap 310. Is done.

The second fastening protrusion 212 may be formed over the entire circumferential direction at the outer circumferential surface of the hub 210 or may be formed at a portion of the circumferential direction. The second fastening groove 311 may also be formed in the entire circumferential direction on the inner circumferential surface of the rear cap 310 or may be formed in a part of the circumferential direction.

When the rear cap 310 is placed in front of the hub 210 and separated from each other, when the front ends of the hubs 210 are inserted into the rear ends of the rear caps 310, the two caps are first inserted into the rear ends of the rear caps 310. The rear end of the inner circumferential surface moves on the second inclined surface 212a of the second fastening protrusion 212, and then the second fastening protrusion 212 of the hub 210 is pressed while being in close contact with the inner circumferential surface of the rear cap 310 (at this time, The second fastening protrusion 212 and the rear cap 310 are elastically deformed and compressed or stretched), and when the second fastening protrusion 212 is moved to the second fastening groove 311, the second fastening protrusion 212 may be formed. 2 is elastically recovered while being inserted into the fastening groove 311, where the second inclined surface 212a is in close contact with the second corresponding inclined surface 311a and the second engaging surface 212b is in close contact with the second corresponding engaging surface 311b. do.

When the rear cap 310 and the hub 210 are coupled to each other, when an external force that pulls the rear cap 310 forward against the hub 210 acts, the second locking surface 212b and the second corresponding latch The surface 311b is held in a mutually held state, and in particular, the second locking surface 212b and the second corresponding engaging surface 311b are formed in a direction orthogonal to the front-back direction X to exhibit a strong resistance to external force. Will be.

As described above, in the syringe assembly 1 according to the present invention, the coupling between the protective cover 300 and the needle assembly 200 by the second fastening protrusion 212 and the second fastening groove 311 can be easily performed while effectively separating. It can be prevented, it is possible to effectively prevent the reuse of the needle assembly 200 in the end.

As mentioned above, when the rear cap 310 and the hub 210 are integrally formed, the separation problem of the rear cap 310 and the hub 210 can be basically solved and a relatively simple assembly process can be achieved. Will be.

The front cap 320 is generally formed in a cylindrical shape, it is preferable to be coupled to the rear cap 310 in a form surrounding the rear cap 310, the front cap 320 is also made of a synthetic resin, such as polypropylene, polyethylene Can be.

A front wall 321 is formed at the front end of the front cap 320, and the withdrawal hole 321a formed through the front wall 321 is provided, and the needle through the withdrawal hole 321a of the front wall 321 220 enters and exits.

An adjustment protrusion 324 may be formed on the outer circumferential surface of the front cap 320, and a plurality of irregularities are formed on the adjustment protrusion 324 to facilitate grip through frictional force, and the user grips the adjustment protrusion 324. The front cap 320 may be moved forward or backward or rotated circumferentially with respect to the rear cap 310.

The inner diameter of the front cap 320 is made to have a shape and size corresponding to the outer diameter of the rear cap 310, the inner diameter of the front cap 320 and the outer diameter of the rear cap 310 is constant along the front and rear direction (X). It is preferable to make.

The front cap 320 is made to surround a part of the needle 220 in the longitudinal direction, the length of the front and rear direction (X) of the front cap 320 is made shorter than the length of the needle 220. However, the total length of the protective cover 300 (the total length in the front cap 320 and the rear cap 310 assembled state) in the state that the front cap 320 and the rear cap 310 is coupled to the needle ( Longer than 220).

And the front cap 320 is coupled to the rear cap 310, it is made to be movable in the front and rear direction (X) and circumferential direction relative to the rear cap 310, the front cap 320 is the rear cap 310 The front end of the needle 220 when moving backward relative to the front cap 320 is located in front of the front end of the front cap 320, the front end of the needle 220 is moved forward when the front cap 320 is moved forward with respect to the rear cap 310 is the front cap ( 320) it is located behind the front end.

That is, when the front cap 320 is moved forward as far as possible with respect to the rear cap 310, the needle 220 is located inside the protective cover 300 and is not exposed to the outside, and the front cap against the rear cap 310. In the case of moving the back 320, the tip portion of the needle 220 is drawn out through the withdrawal hole 321a of the front cap 320, and the needle 220 becomes available.

In the syringe assembly 1 according to the present invention, when the movement between the rear cap 310 and the front cap 320, the guide groove 313 and the slider 322 is formed to guide the movement.

Hereinafter, although the guide groove 313 is formed on the outer circumferential surface of the rear cap 310, the slider 322 is formed on the inner circumferential surface of the front cap 320, but is not limited thereto. (Same shape as the guide groove 313 of the rear cap 310) is formed on the inner peripheral surface of the front cap 320, the slider (same shape as the slider 322 of the front cap 320) of the rear cap 310 It may be formed in the form formed on the outer peripheral surface.

In detail, the guide groove 313 is formed on the outer circumferential surface of the rear cap 310 to form a path, and at least one guide groove 313 may be formed. In particular, two guide grooves 313 may be provided on opposite sides of the outer circumferential surface of the rear cap 310. In this case, two sliders 322 are also provided on the opposite sides of the inner circumferential surface of the front cap 320. Of course it is done.

The guide groove 313 is formed in a concave groove shape on the outer circumferential surface of the rear cap 310, and is divided into a first path 313a, a second path 313b, a third path 313c, and a fourth path 313d. do.

The first path 313a is formed long along the front and rear directions X, and has a length slightly shorter than the length of the front and rear directions X of the rear cap 310.

The second path 313b extends along the circumferential direction of the rear cap 310 at the rear end of the first path 313a, and the second path 313b and the first path 313a are perpendicular to each other.

The third path 313c extends along the circumferential direction of the rear cap 310 at the front end of the first path 313a, and the third path 313c and the first path 313a are perpendicular to each other. The third path 313c may extend in the same direction as the second path 313b and may also extend in different directions.

The fourth path 313d extends along the circumferential direction of the rear cap 310 in the first path 313a while being positioned between the second path 313b and the third path 313c. 313d and the first path 313a are orthogonal to each other. The fourth path 313d may extend in the same direction as the third path 313c and / or the second path 313b, and may extend in different directions.

In addition, at least two fourth paths 313d may be provided and spaced apart from each other, and extension directions of different fourth paths 313d may be different from each other. That is, when one fourth path 313d extends clockwise from the first path 313a, the other fourth path 313d may extend counterclockwise from the first path 313a. .

The slider 322 is formed in the shape of a protrusion on the inner peripheral surface of the front cap 320 is inserted into the guide groove 313, and moves along the path formed by the guide groove 313. When the slider 322 is positioned on the first path 313a of the guide groove 313, the slider 322 moves in a direction other than the longitudinal direction (front and rear direction X) of the first path 313a. The width of the slider 322 is preferably equal to the width of the first path 313a.

When the slider 322 moves while being positioned on the first path 313a, the front cap 320 moves in the front-back direction X against the rear cap 310, and the slider 322 moves the second path 313b. ), When moving on the third path 313c or the fourth path 313d, the front cap 320 rotates in the circumferential direction with respect to the rear cap 310.

When the slider 322 completely enters the third path 313c from the first path 313a, the front cap 320 is prevented from moving backward (and forward) with respect to the rear cap 310, and in this state In the maximum length of the protective cover 300 is maintained. That is, the needle 220 is accommodated in the protective cover 300 is not exposed to the outside, the change in the length of the protective cover 300 is limited.

When the slider 322 completely enters the second path 313b from the first path 313a, the front cap 320 is prevented from moving forward (and backward) with respect to the rear cap 310, and in this state In the minimum length of the protective cover 300 is maintained. That is, the needle 220 is drawn out of the protective cover 300, the protective cover 300 is limited in length change.

Meanwhile, when the slider 322 completely enters any one of the plurality of fourth paths 313d1, 313d2, 313d3, 313d4, 313d5, 313d6 from the first path 313a, the front cap 320 may have a rear cap 310. Movement forward is prevented relative to the base (and back), and in this state, the selected length of the protective cover 300 is maintained. That is, the needle 220 is drawn out of the protective cover 300 as an optional length, the protective cover 300 is limited in length change.

As shown in FIG. 2B, the fourth path 313d includes the fourth-first path 313d1, the fourth-second path 313d2, the fourth-3 path 313d3, and the fourth-4 path. 313d4, the 4-5th path 313d5, and the 4-6th path 313d6.

When the slider 322 enters the 4-6 path 313d6 from the first path 313a, the needle 220 is drawn out of the protective cover 300 as the minimum length by the fourth path 313d. Is maintained, and when the slider 322 enters the 4-1 path 313d1 from the first path 313a, the needle 220 is the maximum length by the fourth path 313d and is outside the protective cover 300. The drawn state is maintained.

The maximum length of the needle 220 by the entry of the slider 322 into the fourth path 313d is smaller than the length of the needle 220 exposed by the entry of the slider 322b. The exposure length of the needle 220 due to entry into any one of the fourth paths 313d1, 313d2, 313d3, 313d4, 313d5, and 313d6 is selected by the user. Of course, the number and directions of the fourth paths 313d may be variously formed.

As such, in the syringe assembly 1 according to the present invention, the slider 322 is moved along the first path 313a so that both the exposure and the shielding of the needle 220 can be made without removing the protective cover 300. In addition, the needle 220 may be maintained by placing the slider 322 in the third path 313c so that the shielded state of the needle 220 is maintained and the slider 322 is located in the second path 313b. By maintaining the exposed state of, to prevent the unintentionally changing the entire length of the protective cover 300 is to contribute to the ease of use and risk prevention.

In addition, the syringe assembly 1 according to the present invention allows the slider 322 to select a state positioned in any one of the plurality of fourth paths 313d1, 313d2, 313d3, 313d4, 313d5, 313d6 when in use. According to the site where the injection is performed, such as intramuscular injection, intravascular injection, and epidermal injection, the length of the needle 220 to be easily exposed can be easily selected, and the exposed state can be maintained firmly. While being able to use it, it is possible to effectively prevent the exposure length of the needle 220 from being unintentionally changed.

As shown in FIG. 4, a plurality of indicators 319 may be formed in the rear cap 310. The indicator 319 is configured to display the exposure length of the needle 220 in a state where the slider 322 is located in any one of the plurality of fourth paths 313d1, 313d2, 313d3, 313d4, 313d5, 313d6. The outer peripheral surface of the cap 310 is formed in adjacent portions of each of the plurality of fourth paths 313d.

Referring to FIG. 2B, when the slider 322 enters the 4-4 path 313d4 from the first path 313a, the needle 220 is as shown in FIG. 4B. As the exposure length by the 4-4 path 313d4, the state drawn out of the protective cover 300 is maintained. The front cap 320 is formed of a transparent material, so that the user visually checks the indicator 319 displayed on the fourth through fourth path 313d4 to which the slider 322 has been entered to determine the exposure length of the needle 220. It can be easily confirmed.

A reference point 323 may be formed on the outer circumferential surface of the front cap 320 so that the position of the slider 322 can be easily confirmed. A detailed description of the reference point 323 will be described later with the description of the lock mark 316a and the safety mark 316b.

As shown in FIG. 5, the plurality of indicators 325 may be formed on the outer circumferential surface of the front cap 320. Referring to FIG. 2B, the indicator 325 may include the front cap as shown in FIG. 5B with the slider 322 positioned in any one of the plurality of fourth paths 313d. The outer peripheral surface of the 320 is formed at a position corresponding to the front end of the rear cap 310. The front cap 320 is formed of a transparent material, the user can easily check the position of the front end portion of the rear cap 310 whose position changes in the interior of the front cap 320.

As shown in Figures 4 and 5, the plurality of indicators (319, 325) is represented as a combination of numbers and symbols that the user can recognize the exposure length of the needle 220, the front cap 320 and the rear cap ( It may be formed in a variety of forms, such as protruding, concave and printed form in 310.

The plurality of

indicators

319 and 325 are shown in centimeters in FIG. 4 and in millimeters in FIG. 5. Of course, the units of the

indicators

319 and 325 can be selectively used in various units such as centimeters, millimeters, and inches, and the exposure length of the needle 220 by the entry of the slider 322 into the fourth path 313d is also illustrated in FIGS. The present invention is not limited to the number shown in FIG. 5 and may be variously selected according to the use and dose of the syringe.

Meanwhile, in the syringe assembly 1 according to the present invention, a locking groove 314 and a locking jaw 315 may be formed on the outer circumferential surface of the rear cap 310.

The locking groove 314 is formed in a concave groove shape, particularly provided on the extension line of the third path 313c so that the slider 322 can be inserted into the fitting groove. Specifically, the locking groove 314 may be formed on the opposite side of the third path 313c at the front end of the first path 313a.

Therefore, when the slider 322 is located at the front end of the first path 313a, when the front cap 320 is rotated to any one side in the circumferential direction with respect to the rear cap 310, the slider 322 is arranged in the third direction. The path 313c may move, and when the front cap 320 is rotated to the other side, the slider 322 may move to the locking groove 314.

The locking jaw 315 is provided between the third path 313c and the locking groove 314, and is formed to protrude higher than the bottom of the third path 313c and the locking groove 314. When moving toward the locking groove 314 in the third path 313c or moving toward the third path 313c in the locking groove 314, a resistance force is applied or limited thereto.

Specifically, the locking jaw 315 forms a gentle inclined surface in the direction toward the locking groove 314 in the third path 313c, and the slider 322 moves toward the locking groove 314 beyond the inclined surface. (However, if a separate external force is not applied, the slider 322 does not go over the inclined surface of the locking jaw 315 but remains on the third path 313c.)

On the other hand, the locking jaw 315 forms a wall surface of which the inclination is steep or vertical in the direction from the locking groove 314 toward the third path 313c, and the slider 322 strikes the wall and toward the third path 313c. Stop moving

As such, the locking step 315 allows the slider 322 to move toward the locking groove 314 in the third path 313c, while the slider 322 moves toward the third path 313c in the locking groove 314. The movement is made to stop.

Therefore, when the use of the syringe assembly 1 according to the present invention is completed, the user can rotate the front cap 320 with respect to the rear cap 310 so that the slider 322 is inserted into the locking groove 314. Accordingly, it is possible to effectively prevent the risk caused by the reuse of the needle 220 and the exposure of the needle 220 (exposure of the tip of the needle 220).

As shown in FIG. 4, in the syringe assembly 1 according to the present invention,

indicators

316a, 316b, and 323 may be formed to confirm whether the slider 322 is inserted into the locking groove 314. . The

indicators

316a, 316b, and 323 are displayed on the rear cap 310 and the front cap 320, respectively.

In addition, the indicators (316a, 316b, 323), the front cap 320 is rotated along the circumferential direction of the rear cap 310 whether the slider 322 is inserted between the engaging projection 317 and the fixing projection 318. It is made to check.

As shown in FIG. 4, the

indicators

316a, 316b, and 323 may include a reference point 323, a lock mark 316a, and a safety mark 316b, wherein the reference point 323 is the front cap 320. ), The lock mark 316a and the safety mark 316b are displayed on the rear cap 310.

When the reference point 323 is located on the safety mark 316b side, the slider 322 is positioned on the third path 313c, and when the reference point 323 is located on the lock mark 316a side, the slider 322. Can be positioned on the locking groove 314, it is possible to easily recognize whether the syringe assembly 1 is used through this indicator (see Fig. 4 (D)).

In FIGS. 4 (C) and 4 (D), the locking mark 316a and the safety mark 316b are shown to be located inside the adjusting protrusion 324, and the adjusting protrusion 324 is made of a transparent material or the adjusting protrusion. When a hole for exposing the lock mark 316a and the safety mark 316b to the outside is formed, the user can check the lock mark 316a and the safety mark 316b.

As shown in FIG. 6, the indicator may include a reference point 323, a lock mark 316a, a safety mark 316b, and a neutral mark 316c. In this case, the indicator may be formed where the guide groove 313 does not overlap.

As shown in FIG. 4C, the reference point with the slider 322 positioned at the front end of the first path 313a indicates the neutral mark 316c as shown in FIG. 6B, and FIG. As shown in 4D, when the slider 322 moves to the locking groove 314 while being positioned at the front end of the first path 313a, the reference point is locked as shown in FIG. 6A. The indication 316a is indicated. When the slider 322 moves to the third path 313c while the slider 322 is located at the front end of the first path 313a, the reference point indicates the safety mark 316b as shown in FIG. 6C.

Of course, the position and shape of the reference point 323, the locking mark 316a, the safety mark 316b, and the neutral mark 316c constituting the indicator are not limited to FIGS. 4 and 6. That is, the reference point 323, the lock mark (316a), the safety mark (316b) and the neutral mark (316c) is the front cap 320, the rear cap (with the range that the user can check the rotation position of the slider 322) 310 and the adjustment protrusion 324 may be formed in a variety of positions and shapes, it may be provided in a variety of forms, such as protruding from the front cap 320 and the rear cap 310, concave and printed form.

In addition, in the syringe assembly 1 according to the present invention, a locking protrusion 317 may be formed, and the locking protrusion 317 is formed on the rear cap 310, and the second path 313b and the third path ( 313c and / or protrude in a direction of reducing the width of the guide groove 313 on the fourth path 313d. In particular, the locking protrusion 317 is formed on the side adjacent to the first path 313a.

Thus, as the slider 322 moves toward the second path 313b, the third path 313c, or the fourth path 313d on the first path 313a, the slider 322 rides on the protrusion 317. After crossing, the second path 313b, the third path 313c, or the fourth path 313d stays on, and the slider 322 is prevented from moving back toward the first path 313a.

That is, the locking protrusion 317 is unintentionally slider in a state where the slider 322 is moved toward the second path 313b, the third path 313c, or the fourth path 313d on the first path 313a. It is possible to prevent the 322 from moving back toward the first path 313a and to stably maintain the shortest length state, the longest length state, and the variable length of the protective cover 300.

On the other hand, as a way to allow the slider 322 to remain stably on the second path (313b) or the third path (313c) may be considered to form a large projecting degree of the locking projection 317, in this case, the obstacle As the protruding length of the machine 317 is long, a strong load (big moment) is applied, and such a structure can cause breakage of the locking protrusion 317.

In the syringe assembly 1 according to the present invention, in order to solve this problem, the fixing protrusion 318 is formed separately from the locking protrusion 317.

The fixing protrusion 318 is formed on the rear cap 310 together with the locking protrusion 317, and in particular, the direction of reducing the width of the guide groove 313 on the second path 313b and / or the third path 313c. It is made of a protruding form. When the locking protrusion 317 is formed on the second path 313b (and / or the third path 313c), the fixing protrusion 318 is also formed on the second path 313b, and the locking protrusion 317 is formed. Is not formed on the second path 313b (and / or the third path 313c), the fixing protrusion 318 is also not formed on the second path 313b.

The protruding length of the fixing protrusion 318 is preferably the same as the protruding length of the locking protrusion 317.

The fixing protrusion 318 is located farther from the first path 313a than the locking protrusion 317, and in particular, the protrusion direction of the fixing protrusion 318 is made to be opposite to the protrusion direction of the locking protrusion 317.

Therefore, in a state where the slider 322 remains on the second path 313b or the third path 313c after the slider 322 passes over the locking protrusion 317, the slider 322 is in close proximity to or in close contact with the fixing protrusion 318. Therefore, the rear cap 310 and the front cap 320 can be fixed while minimizing play.

In addition, the slider 322 can be stably stayed on the second path 313b or the third path 313c even if the protruding degree of the locking protrusion 317 is not large, and accordingly, the locking protrusion 317 is provided. The problem of being damaged can be prevented.

Although the fixing protrusion 318 is not illustrated on the fourth path 313d in FIG. 2B, the fixing protrusion 318 may also be formed on the fourth path 313d.

While specific embodiments of the invention have been described and illustrated above, it is to be understood that the invention is not limited to the described embodiments, and that various modifications and changes can be made without departing from the spirit and scope of the invention. It is self-evident to those who have. Therefore, such modifications or variations are not to be understood individually from the technical spirit or point of view of the present invention, the modified embodiments will belong to the claims of the present invention.

According to the syringe assembly according to the present invention, by using a protective cover consisting of the rear cap and the front cap, a safe and easy processing is made in the storage, use and disposal of the syringe assembly, as well as a fixed position of the front cap against the rear cap It is possible to easily adjust the exposure length of the needle and to prevent unintentionally varying the exposure length of the needle, to limit the separation of the needle assembly from the syringe body, and also to separate the needle assembly and the protective cover In order to limit the effective use of the syringe body or the needle assembly, it is possible to overcome the limitations of the existing technology, so that not only the use of the related technology but also the possibility of marketing or operating the applied device is sufficient and practically. As it is degree to be able to perform clearly It is an invention that can be used.

Claims

A syringe body including a body configured to move the piston inserted therein forward and backward and an injection portion smaller in diameter than the body in front of the body;

A needle assembly including a hub coupled to the injection unit and a needle protruding forward from the hub;

A rear cap formed in a cylindrical shape to surround a portion of the needle and coupled to the injection portion or the hub; And

Is formed in a cylindrical shape surrounds a portion of the needle, coupled to the rear cap slides in the front and rear directions, moving in the circumferential direction including a front cap which is prevented from moving in the front and rear directions .
The method of claim 1,

The front end of the needle is located in front of the front cap front when the front cap is moved backwards with respect to the rear cap, and the front end of the needle is rearward of the front cap front when the front cap is moved forward to the rear cap. Syringe assembly, characterized in that located in.
The method of claim 1,

At least one guide groove forming a path is formed on the outer circumferential surface of the rear cap,

On the inner circumferential surface of the front cap is formed a slider which is inserted into the guide groove to move along the guide groove,

The guide groove,

A first path formed along the front and rear directions;

A second path extending along the circumferential direction of the rear cap at a rear end of the first path; And

And a third path extending along the circumferential direction of the rear cap at the front end of the first path.
The method of claim 3,

And the guide groove comprises a fourth path located between the second path and the third path and extending along the circumferential direction of the rear cap in the first path.
The method of claim 4, wherein

And at least two fourth passages and spaced apart from each other.
The method of claim 5,

Injector assembly, characterized in that the extending direction of the different fourth path is different.
The method of claim 1,

At least one guide groove forming a path is formed on the inner circumferential surface of the front cap,

On the outer circumferential surface of the rear cap is formed a slider which is inserted into the guide groove to move along the guide groove,

The guide groove,

A first path formed along the front and rear directions;

A second path extending along the circumferential direction of the rear cap at a rear end of the first path; And

And a third path extending along the circumferential direction of the rear cap at the front end of the first path.
The method of claim 7, wherein

And the guide groove comprises a fourth path located between the second path and the third path and extending along the circumferential direction of the rear cap in the first path.
The method of claim 3,

The outer peripheral surface of the rear cap, the syringe assembly, characterized in that the locking groove is provided on the extension line of the third path and the locking jaw provided between the third path and the locking groove is formed.
The method of claim 9,

The rear cap and the front cap, the syringe assembly, characterized in that the indicator is formed so that the front cap rotates along the circumferential direction of the rear cap to determine whether the slider is inserted into the locking groove.
The method of claim 4, wherein

The rear cap is provided with a locking protrusion protruding in the direction of reducing the width of the guide groove on the second path, the third path or the fourth path,

And the slider is configured to be able to stay over the second path, the third path, or the fourth path by riding over the locking projection.
The method of claim 11,

The rear cap is provided with a fixing protrusion protruding in a direction of reducing the width of the guide groove on the second path or the third path, the protruding direction of which is opposite to the locking protrusion,

And the fixing protrusion is located farther from the first path than the locking protrusion.
The method of claim 12,

The rear cap and the front cap, the syringe is characterized in that the indicator is formed so that the front cap rotates along the circumferential direction of the rear cap to determine whether the slider is inserted between the locking projection and the fixing projection. Assembly.
The method of claim 1,

At least one of the injection part and the hub is formed with a first fastening protrusion and the other is formed with a first fastening groove into which the first fastening protrusion is inserted, and the first fastening protrusion is inserted into the first fastening groove. And the hub is prevented from moving forward with respect to the injector.
The method of claim 14,

The first fastening protrusion protrudes from an outer circumferential surface of the injection part, but is firstly bent or bent at a rear end of the first inclined surface and protrudes outwardly toward the rear side to form a surface perpendicular to the front-back direction. Including cotton,

The first fastening groove is formed in the inner peripheral surface of the hub, the longitudinal cross-sectional shape of the syringe assembly, characterized in that the same as the longitudinal cross-sectional shape of the first fastening protrusion.
The method of claim 15,

The first fastening protrusion is a syringe assembly, characterized in that formed on the whole or part of the outer peripheral surface of the injection portion.
The method of claim 1,

One of the hub and the rear cap is formed with a second fastening protrusion, and the other is formed with a second fastening groove into which the second fastening protrusion is inserted, and the second fastening protrusion is inserted into the second fastening groove. And the rear cap is prevented from moving forward with respect to the hub.
The method of claim 17,

The second fastening protrusion protrudes from the outer circumferential surface of the hub, but the second locking surface further protrudes outward toward the rear side and the second locking surface that is bent or bent at the rear end of the second inclined surface to form a surface orthogonal to the front-back direction. Including,

The second fastening groove is formed on the inner circumferential surface of the protective cover, the longitudinal cross-sectional shape of the syringe assembly, characterized in that the same as the longitudinal cross-sectional shape of the second fastening protrusion.
The method of claim 18,

And the second fastening protrusion is formed on all or part of an outer circumferential surface of the hub.
The method of claim 4, wherein

The rear cap or the front cap, the indicator is formed so that the front cap is rotated along the circumferential direction of the rear cap to check the exposure length of the needle when the slider is inserted into the fourth path. Syringe assembly.