KR20170019187A

KR20170019187A - Syringe assembly

Info

Publication number: KR20170019187A
Application number: KR1020150113253A
Authority: KR
Inventors: 박경택
Original assignee: 주식회사 세이퍼위드
Priority date: 2015-08-11
Filing date: 2015-08-11
Publication date: 2017-02-21

Abstract

Disclosed is a syringe assembly. The syringe assembly of the present invention comprises: a syringe body including a body having a piston inserted therein to be forwardly and backwardly moved, and a feeding part formed in front of the body to have a smaller diameter than the body; a needle assembly including a hub coupled with the feeding part, and a needle lengthily protruding to a front side from the hub; a rear cap formed in a cylindrical shape to wrap a part of a needle, and coupled with the feeding part or the hub; and a front cap formed in a cylindrical shape, wrapping a part of the needle, coupled with the rear cap, forwardly and backwardly sliding, moving in a circumferential direction, and hindered not to move in a forward and backward direction. According to the present invention, a protection cover made of the rear cap and the front cap is used, so the syringe assembly can be safely and easily treated when being stored, used, and wasted. Also, by adjusting a fixing position of the front cap with respect to the rear cap, the exposure length of the needle can be easily adjusted, and the exposure length of the needle can be prevented from being unintentionally changed. The separation of the needle assembly from the syringe body is limited, and the separation between the needle assembly and the protection cover are limited, so a reuse of the syringe body or the needle assembly can be effectively prevented.

Description

Syringe assembly {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 can prevent re-use.

Conventionally, when the syringe is used, a problem that the needle portion and the syringe body portion are separated from each other often occurs, which occurs mainly in the process of separating the needle protection cap from the needle portion or when the mucous drug is injected.

In order to compensate for this, a product called Luer Lock (screw connection using needle hub wing) has been developed. In Korea, a locking syringe (similar to a Luer Lock type screw) has been developed .

However, Luer lock type and lock syringe have a relatively low price competitiveness due to the complexity of the mold and the production method compared to the conventional syringe (Luer Slip with simple assembly method) due to the existence of thread in the product . The syringe market is a market in which mass production through automation is an indispensable market.

The two products are designed to be detachable in consideration of user convenience at the time of development, but such a structure is disadvantageous in terms of prevention of reuse. Meanwhile, in February 2015, WHO launched the Global Injection Safety Campaign and launched the safety syringe as a device with Auto Disable (AD), Reuse Prevention (RUP) and Sharp Injury Protection (SIP) And has initiated a recommendation campaign to switch from using existing syringes to using safety syringes.

Korean Patent No. 10-1228585 discloses a "disposable syringe ". Specifically, the syringe includes an outer fastening portion formed at the outer periphery of the injection port of the syringe and an injection needle And the connection cock of the injection needle, which is coupled to the injection cylinder, and the chemical solution injection port are coupled by a screw fastening method. In this case, when the injection needle is injected The outer tapered portion formed at the outer periphery of the chemical liquid injection port at the time of scanning is in intimate contact with the inner tapered portion formed at the periphery of the connecting cock of the injection needle to leak the chemical liquid through the connecting portions of the double member, Can be prevented.

However, when the injection needle and the liquid injection opening are screwed together as in the syringe disclosed in Korean Patent No. 10-1228585, the user can easily separate the injection needle and the liquid injection opening when necessary, It becomes vulnerable to prevention of reuse.

In addition, when an external force acts on the threaded portion, the needle may unintentionally separate from the liquid injection opening or loosen the joint, which may interfere with the use of the syringe or act as a risk factor.

On the other hand, the injection can be divided into an intramuscular injection, a vascular injection, and a skin injection according to the part to be performed. In general, it is common to use each of the standardized injection needles for the purpose of the injection. So that one syringe can be used for various procedures.

However, it is still necessary to develop a syringe in which the prevention of the reuse of the injection needle and the adjustment of the exposure length of the injection needle are harmoniously required. In particular, the development of a syringe capable of effectively preventing the unintentional change of the exposure length of the injection needle is required.

(0001) Korean Patent No. 10-1228585 (Published on January 31, 2013)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a syringe assembly capable of eliminating separation problems between a syringe body portion and a needle portion, preventing reuse, and easily adjusting an exposure length of a syringe needle while having a production and price competitiveness.

According to an aspect of the present invention, there is provided a syringe body including a body having a piston inserted therein and moving forward and backward, and an injection unit having a diameter smaller than that of the body in front of the body; A needle assembly including a hub coupled to the injection portion and a needle projecting forwardly from the hub; A rear cap formed in a cylindrical shape and surrounding a part of the needle, the rear cap being coupled to the injection section or the hub; And a front cap which is formed in a cylindrical shape and surrounds a part of the needle and is engaged with the rear cap to slide in the forward and backward directions and move in the circumferential direction to prevent movement in the forward and backward directions. Assembly.

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

Here, the fourth path may include at least two paths and may be spaced apart from each other.

Further, the extending directions of the fourth paths different from each other can be made different.

In the syringe assembly according to the present invention, at least one guide groove forming a path is formed on the inner circumferential surface of the front cap, a slider inserted into the guide groove and moving along the guide groove is formed on the outer circumferential surface of the rear cap, Wherein the guide groove includes: a first path extending along the front-rear direction; A second path extending along a circumferential direction of the rear cap at a rear end of the first path; A third path extending in a circumferential direction of the rear cap at a front end of the first path; And a fourth path located between the second path and the third path, the fourth path extending along the circumferential direction of the rear cap in the first path.

The outer surface of the rear cap may have a locking groove provided on an extension of the third path to receive the slider and a locking protrusion provided between the third path and the locking groove.

At this time, an indicator may be formed on the rear cap and the front cap 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.

Further, in the syringe assembly according to the present invention, the rear cap may be 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 can stay on the second route, the third route or the fourth route.

Wherein 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 and having a protruding direction opposite to the locking protrusion, And may be located far away from the first path.

An indicator may be formed on the rear cap and the front cap so that the front cap rotates along the circumferential direction of the rear cap to check whether the slider is inserted between the locking protrusion and the fixing protrusion.

In the syringe assembly according to the present invention, the first fastening protrusion is formed in one of the injection unit and the hub, and the first fastening groove is formed in the other one of the first fastening protrusion and the first fastening protrusion, The hub can be prevented from moving forward with respect to the injection unit.

Further, in the syringe assembly according to the present invention, the second fastening protrusion is formed on one of the hub and the rear cap, and the second fastening groove is formed on the other of the hub and the rear cap to which the second fastening protrusion is inserted, The rear cap may be prevented from moving forward with respect to the hub in a state where the projection is inserted into the second engagement groove.

The rear cap or the front cap may be formed with an indicator so that the front cap rotates along the circumferential direction of the rear cap and the exposed length of the needle when the slider is inserted into the fourth path. have.

In accordance with the present invention, the use of a protective cap comprising a rear cap and a front cap provides safe and easy handling during storage, use, and disposal of the syringe assembly, as well as adjusting the fixation position of the front cap relative to the rear cap, The length of exposure of the needle can be easily adjusted and the length of exposure of the needle can be prevented from varying and the separation of the needle assembly from the syringe body is restricted and the separation between the needle assembly and the protective cap is limited, It is possible to effectively prevent the syringe body or the needle assembly from being reused.

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

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, the well-known functions or constructions are not described in order to simplify the gist of the present invention.

1 is a perspective view showing a syringe assembly 1 according to one embodiment of the present invention, Fig. 2 is an exploded perspective view showing the syringe assembly 1 shown in Fig. 1, and Fig. 3 is a cross- Sectional view of the syringe assembly 1 and FIGS. 4-6 illustrate the operation of the protective sheath 300 in the syringe assembly 1 according to the present invention.

Particularly, FIG. 2 (B) is an enlarged view of a portion of the guide groove 313 of FIG. 3 (A), and FIG. 3 (B) (C) and (D) of FIG. 4 are sectional views of the front cap 320 in a cross-sectional view for convenience of explanation. Respectively.

A syringe assembly 1 according to the present invention comprises a syringe body 100, a needle assembly 200, and a protective sheath 300. In the following description of the syringe assembly 1 according to the present invention, the side on which the needle assembly 200 is formed is defined as the rear side on which the front syringe body 100 is formed.

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

The body 110 has a cylindrical shape and stores an injection liquid therein. The piston 110 is inserted into the body 110 and moves in the forward and backward directions X. As the injection fluid flows into the body 110, Thereby allowing the injection liquid to leak out.

The cross-sectional shape and the inner diameter of the body 110 are preferably constant along the forward and backward directions X and are constant along the forward and backward directions X at least within the range in which the piston moves in the forward and backward directions X.

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

The inner diameter of the injection unit 120 may be constant along the forward and backward directions X. The outer diameter of the injection unit 120 may be constant along the forward and backward directions X, have.

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

The needle 220 may be made of a metal or a synthetic resin so as to form a path through which the skin is pierced and injected into the body of the body 110 through the body.

The hub 210 allows the needle assembly 200 to be secured and secured to the syringe body 100 and is coupled to the injection port 120 to allow the interior of the body 110 and the needle 220 to communicate with each other.

The hub 210 is generally formed in a cylindrical shape and is connected to the injection unit 120 in a form surrounding the injection unit 120. The hub 210 may also be made of a synthetic resin such as polypropylene or polyethylene .

The inner diameter of the hub 210 has a shape and size corresponding to the outer diameter of the injection unit 120. When the outer diameter of the injection unit 120 is constant along the forward and backward directions X, Further, in the case where the diameter of the injection unit 120 is constantly decreased along the forward and backward directions X and the diameter of the injection unit 120 is decreased toward the front, the inner diameter of the hub 210 is decreased Lt; / RTI >

In the syringe assembly 1 according to the present invention, the hub 210 and the injection unit 120 are not merely constrained to each other, but are configured such that the hub 210 is not easily separated after being coupled to the injection unit 120 A first fastening protrusion 121 is formed on one of the injection part 120 and the hub 210 and a first fastening groove 211 is formed on the other of the injection part 120 and the hub 210. The first fastening protrusion 121 is inserted into the first fastening protrusion 121 .

The hub 210 is prevented from moving forward relative to the injection unit 120 in a state where the first fastening protrusion 121 is inserted into the first fastening groove 211.

The first fastening protrusion 121 is formed in the injection part 120 and the first fastening groove 211 is formed in the hub 210. In this case, (See FIG. 3 (B)) or bent at the rear end of the first inclined face 121a and the first inclined face 121a, which are further projected outward from the outer circumferential surface of the portion 120 The first fastening groove 211 is formed on the inner circumferential surface of the hub 210 and the longitudinal direction of the first fastening protrusion 121 is perpendicular to the longitudinal direction X of the first fastening protrusion 121. [ The shape of the longitudinal section of the end portion is matched. That is, the first engagement groove 211 also has a first corresponding inclined surface 211a corresponding to the first inclined surface 121a and a first corresponding engagement surface 211b corresponding to the first engagement surface 121b.

When the first engaging surface 121b is bent at the first inclined surface 121a, the connecting surface between the first engaging surface 121b and the first inclined surface 121a forms a curved surface. In this case, The first fastening protrusion 121 can be easily attached to and detached from the mold. This curved surface treatment can 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 on the outer circumferential surface of the injection part 120. The first fastening groove 211 has a constant section along the circumferential direction on the inner circumferential surface of the hub 210 .

The first fastening protrusion 121 may be formed in the entire circumferential direction on the outer circumferential surface of the injection section 120, or may be formed in a part 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 unit 120 are separated from each other so that the front end of the injection unit 120 is inserted into the rear end of the hub 210 while the hub 210 is positioned in front of the injection unit 120. [ The rear end of the inner circumferential surface of the hub 210 moves along the first inclined surface 121a of the first fastening protrusion 121 and then the first fastening protrusion 121 of the injecting portion 120 moves to the hub 210 The first fastening protrusion 121 is elastically deformed and compressed so that the hub 210 is elastically deformed and stretched so that the first fastening protrusion 121 is pressed against the first fastening groove 121. In this case, The first inclined surface 121a is brought into close contact with the first corresponding inclined surface 211a and the first inclined surface 121a is brought into close contact with the first inclined surface 211a, (121b) is brought into close contact with the first corresponding engagement surface (211b).

When the hub 210 and the injection unit 120 are coupled to each other and an external force for pulling the hub 210 forward is applied to the injection unit 120, the first engagement surface 121b and the first engagement surface The surfaces 211b are held in mutual engagement and in particular the first engagement surface 121b and the first engagement surface 211b are formed in a direction orthogonal to the forward and backward directions X, .

As described above, in the syringe assembly 1 according to the present invention, the syringe main body 100 and the needle assembly 200 can be easily coupled by the first fastening protrusion 121 and the first fastening groove 211, So that the reusability of the syringe body 100 or the needle assembly 200 can be effectively prevented.

The protective sheath 300 is generally cylindrical in shape and surrounds the needle 220 and is adapted to be coupled to the injection section 120 or the hub 210.

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

1 through 4, the protective cap 300 is illustrated as being removably coupled to the hub 210 of the needle assembly 200. However, the cap 310 is not necessarily constructed as such, And may be integrated with the hub 210 of the assembly 200. When the rear cap 310 is integrally formed with the hub 210, it is needless to say that the second fastening protrusion 212 and the second fastening protrusion 311 are not formed.

Hereinafter, a description will be made with reference to a form in which the protective lid 300 is detachably coupled to the hub 210 of the needle assembly 200.

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

The rear cap 310 is configured to surround a portion of the needle 220 in the longitudinal direction so that the length of the rear cap 310 in the forward and backward directions X 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 is formed through the rear wall 312. The through hole 312a of the rear wall 312 forms a through hole 312a, (220) can be moved.

The inner diameter of the rear cap 310 is set to have a shape and size corresponding to the outer diameter of the hub 210. When the outer diameter of the hub 210 is constant along the forward and backward directions X, When the inner diameter of the cap 310 is constant along the forward and backward direction X and the outer diameter of the hub 210 is reduced toward the front side, the inner diameter of the rear cap 310 also increases toward the front The diameter may be reduced.

The rear cap 310 and the hub 210 are not simply coupled to each other but are formed such that the rear cap 310 is not easily separated after being coupled to the hub 210. For this purpose, 310 are formed with a second fastening protrusion 212 and the other is formed with a second fastening recess 311 into which the second fastening protrusion 212 is inserted.

When the second fastening protrusion 212 is inserted into the second fastening groove 311, the rear cap 310 is prevented from moving toward the hub 210 in the forward direction.

More preferably, the second fastening protrusion 212 is formed in the hub 210 and the second fastening groove 311 is formed in the rear cap 310, (Refer to FIG. 3 (B)) or bent at the rear end of the second inclined surface 212a and the second inclined surface 212a which are further projected outward from the outer circumferential surface of the body 210 (see FIG. 3 (C) And the second engagement groove 311 is formed on the inner circumferential surface of the rear cap 310. The longitudinal direction of the second engagement groove 311 is the same as that of the second engagement protrusion 212, The shape of the longitudinal section of the end portion is matched. That is, the second engagement groove 311 is also formed with the second corresponding inclined surface 311a corresponding to the second inclined surface 212a and the second corresponding engagement surface 311b corresponding to the second engagement surface 212b.

The second fastening protrusion 212 has a constant section along the circumferential direction on the outer circumferential surface of the hub 210. The second fastening protrusion 212 has a constant cross section along the circumferential direction on the inner circumferential surface of the rear cap 310, .

The second fastening protrusion 212 may be formed in the circumferential direction on the outer circumferential surface of the hub 210, or may be formed in a part of the circumferential direction. The second fastening groove 311 may be formed entirely in the 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 coupled to the front end of the rear cap 310 so that the front end of the hub 210 is inserted into the rear end of the rear cap 310 while the rear caps 310 are disposed on the front side of the hub 210, The rear end of the inner circumferential surface moves along the second inclined surface 212a of the second clamping protrusion 212 and then the second clamping protrusion 212 of the hub 210 is pressed while being in close contact with the inner circumferential surface of the rear cap 310 The second fastening protrusion 212 and the rear cap 310 are elastically deformed to be compressed or stretched) and when the second fastening protrusion 212 is moved to the second fastening groove 311, The second inclined surface 212a is brought into close contact with the second corresponding inclined surface 311a and the second engagement surface 212b is brought into close contact with the second corresponding engagement surface 311b do.

When the rear cap 310 and the hub 210 are coupled to each other and an external force for pulling the rear cap 310 forward is applied to the hub 210, the second engagement surface 212b and the second engagement surface The surface 311b is kept in contact with each other and the second engaging surface 212b and the second engaging surface 311b are formed in a direction orthogonal to the forward and backward directions X, .

As described above, in the syringe assembly 1 according to the present invention, the coupling lid 300 and the needle assembly 200 can be easily coupled by the second fastening protrusion 212 and the second fastening groove 311, So that the reuse of the needle assembly 200 can be effectively prevented.

As described above, when the rear cap 310 and the hub 210 are integrally formed, it is possible to fundamentally solve the problem of separation between the rear cap 310 and the hub 210 and achieve a relatively simple assembly process .

The front cap 320 is formed in a generally cylindrical shape and is coupled to the rear cap 310 in a surrounding manner surrounding the rear cap 310. The front cap 320 is also made of a synthetic resin such as polypropylene or polyethylene .

A front wall 321 is formed at the front end of the front cap 320 and a draw-out hole 321a penetrating through the front wall 321 is formed, and the needle 321a of the front wall 321 is inserted through the draw- (220) enters and exits.

A plurality of protrusions and recesses are formed on the adjustment protrusion 324 for facilitating gripping by frictional force on the outer circumference of the front cap 320. The user grips the adjustment protrusion 324, The front cap 320 can be advanced or retracted or rotated in the circumferential direction against the rear cap 310.

The inner diameter of the front cap 320 and the outer diameter of the rear cap 310 are formed to have a shape and size corresponding to the outer diameter of the rear cap 310, .

The front cap 320 is configured to surround a portion of the needle 220 in the longitudinal direction and the front cap 320 has a length in the forward and backward directions X that is shorter than the length of the needle 220. The total length of the protective cap 300 in a state in which the front cap 320 and the rear cap 310 are combined is the sum of the length of the front cap 320 and the rear cap 310, 220).

The front cap 320 is coupled to the rear cap 310 so as to be movable in the forward and backward directions X and the circumferential direction with respect to the rear cap 310. The front cap 320 is connected to the rear cap 310, The front end of the needle 220 is positioned in front of the front end of the front cap 320 and the front end of the needle 220 is moved forward when the front cap 320 moves forward to the front end of the rear cap 310. [ 320) shear.

That is, when the front cap 320 is moved forward as far as possible against the rear cap 310, the needle 220 is positioned inside the protective lid 300 and is not exposed to the outside, The tip portion of the needle 220 is pulled out through the draw-out hole 321a of the front cap 320 when the needle 320 is moved backward, so that the needle 220 becomes usable.

The guide groove 313 and the slider 322 are formed to guide the movement of the syringe assembly 1 between the rear cap 310 and the front cap 320. [

The guide groove 313 is formed on the outer circumferential surface of the rear cap 310 and the slider 322 is formed on the inner circumferential surface of the front cap 320. However, (The same shape as the guide groove 313 of the rear cap 310) is formed on the inner circumferential surface of the front cap 320 while the slider (the same shape as the slider 322 of the front cap 320) And may be formed on the outer circumferential surface.

More specifically, the guide groove 313 is formed on the outer circumferential surface of the rear cap 310 and forms a path, and at least one or more guide grooves 313 may be formed. More specifically, the guide grooves 313 may be provided at two positions on the outer circumferential surface of the rear cap 310, and two sliders 322 may be provided on the inner circumferential surface of the front cap 320, Of course.

The guide groove 313 is formed in a concave groove shape on the outer circumferential surface of the rear cap 310 and 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 elongated along the forward and backward directions X and has a length slightly shorter than the length of the rear cap 310 in the forward and backward directions X. [

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 extend in different directions.

The fourth path 313d is located between the second path 313b and the third path 313c and extends along the circumferential direction of the rear cap 310 in the first path 313a, 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, the fourth paths 313d may be provided in at least two and may be spaced apart from each other, and the extending directions of the different fourth paths 313d may be different from each other. That is, when any one of the fourth paths 313d extends clockwise in the first path 313a, the other fourth path 313d may extend in the counterclockwise direction in the first path 313a .

The slider 322 is formed in the shape of a protrusion on the inner circumferential surface of the front cap 320 and 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 the direction other than the longitudinal direction of the first path 313a It is preferable that the width of the slider 322 is 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 forward and backward directions X relative to the rear cap 310 and the slider 322 moves along the second path 313b , The third cap 313c or the fourth cap 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, The maximum length of the protective cover 300 is maintained. That is, at this time, the needle 220 is received in the protective cover 300 and is not exposed to the outside, and the change of 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, The minimum length of the protective cover 300 is maintained. That is, at this time, the needle 220 is drawn out of the protective cover 300, and the length of the protective cover 300 is limited.

When the slider 322 completely enters one of the plurality of fourth paths 313d1, 313d2, 313d3, 313d4, 313d5 and 313d6 in the first path 313a, the front cap 320 moves in the direction of the rear cap 310, (And rearward) with respect to the base end of the protective cap 300, and in this state, the selected length of the protective cap 300 is maintained. That is, at this time, the needle 220 is pulled out of the protective cover 300 as an optional length, and the protective cover 300 is limited in length variation.

As shown in Fig. 2B, the fourth path 313d includes a fourth-first path 313d1, a fourth-second path 313d2, a fourth-third path 313d3, The fourth to fifth path 313d5, and the fourth to sixth path 313d6.

When the slider 322 enters the 4-6 path 313d6 from the first path 313a, the needle 220 is the minimum length by the fourth path 313d and is drawn out of the protective cover 300 When the slider 322 is moved from the first path 313a to the fourth path 173d1 and the needle 220 reaches the maximum length by the fourth path 313d, As shown in Fig.

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

As described above, in the syringe assembly 1 according to the present invention, since the slider 322 is moved along the first path 313a, both the exposure and the shielding of the needle 220 can be performed without detaching the protective lid 300 The slider 322 is positioned on the third path 313c so that the shielded state of the needle 220 is maintained and the slider 322 is positioned on the second path 313b, So that the entire length of the protective lid 300 is prevented from being varied unintentionally, thereby contributing to ease of use and prevention of danger.

In addition, the syringe assembly 1 according to the present invention allows the slider 322 to select a state in which the slider 322 is positioned in any one of the plurality of fourth paths 313d1, 313d2, 313d3, 313d4, 313d5, and 313d6, The length of the needle 220 to be exposed can be easily selected according to the region where the injection is to be performed, such as an intramuscular injection, a blood vessel injection, a cuticle injection, etc., and the exposed state can be maintained firmly. So that the exposure length of the needle 220 can be effectively prevented from being unintentionally changed.

As shown in FIG. 4, a plurality of indicators 319 may be formed on the rear cap 310. The indicator 319 indicates the exposure length of the needle 220 in a state where the slider 322 is positioned in any one of the plurality of fourth paths 313d1, 313d2, 313d3, 313d4, 313d5 and 313d6, And is formed at an adjacent portion of each of the plurality of fourth paths 313d on the outer circumferential surface of the cap 310. [

2B, when the slider 322 enters from the first path 313a to the fourth path 4114d4, the needle 220 is moved in the first path 313a, as shown in FIG. 4 (B) The exposed state by the fourth 4-4 path 313d4 is maintained as the exposed state to the outside of the protective cover 300. [ The front cap 320 is formed of a transparent material so that the user can visually confirm the indicator 319 displayed on the fourth-fourth path 313d4 in which the slider 322 enters, Can be easily confirmed.

A reference point 323 may be formed on the outer circumferential surface of the front cap 320 to easily identify the position of the slider 322. A detailed description of the reference point 323 will be given later with a description of the lock indication 316a and the safety indication 316b.

As shown in FIG. 5, the plurality of indicators 325 may be formed on the outer circumferential surface of the front cap 320. 2B, when the slider 322 is positioned on any one of the plurality of fourth paths 313d, the indicator 325 is moved in the forward direction 320 at a position corresponding to the front end of the rear cap 310. The front cap 320 is formed of a transparent material, and the user can easily confirm the position of the front end of the rear cap 310 whose position changes inside the front cap 320.

4 and 5, the plurality of indicators 319 and 325 are denoted as a combination of numbers and symbols that allow the user to recognize the exposure length of the needle 220, and the front cap 320 and the rear cap 310, a concave shape, a printed shape, and the like.

The plurality of indicators 319, 325 are shown in centimeters in FIG. 4 and in millimeters in FIG. Of course, the units of the indicators 319 and 325 can be selectively used in various units such as centimeters, millimeters, and inches. The exposure length of the needle 220 by the entry of the slider 322 into the fourth path 313d is also shown in FIGS. But may be variously selected depending on the use and capacity of the syringe.

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

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

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

The latching jaw 315 is provided between the third path 313c and the locking groove 314 and protrudes higher than the bottom of the third path 313c and the locking groove 314 so that the slider 322 The resistance force acts or restricts the movement to the locking groove 314 in the third path 313c or to the third path 313c in the locking groove 314. [

More specifically, the latching jaw 315 forms a gentle slope in the direction from the third path 313c toward the locking groove 314, and the slider 322 moves beyond the inclined surface to the locking groove 314 (However, if the external force is not applied, the slider 322 may stay on the third path 313c without exceeding the inclined surface of the stopping jaw 315.)

On the other hand, the latching jaw 315 forms a wall surface which is steep or perpendicular to the slope in the direction from the locking groove 314 toward the third path 313c, and the slider 322 hits against the wall surface and moves toward the third path 313c It prevents you from moving.

As described above, the latching jaw 315 allows the slider 322 to move from the locking groove 314 toward the third path 313c while allowing the slider 322 to move from the third path 313c toward the locking groove 314 Moving is done so that it can be stopped.

The user can rotate the front cap 320 about the rear cap 310 so that the slider 322 is inserted into the locking groove 314 when the use of the syringe assembly 1 according to the present invention is completed Thereby effectively preventing the risk of reuse of the needle 220 and exposure of the needle 220 (exposure of the tip of the needle 220).

4, in the syringe assembly 1 according to the present invention, indicators 316a, 316b, and 323 may be formed so as to confirm whether or not 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.

The indicators 316a, 316b and 323 also indicate whether or not the front cap 320 rotates along the circumferential direction of the rear cap 310 so that the slider 322 is inserted between the locking projection 317 and the fixing protrusion 318 .

4, the indicators 316a, 316b, and 323 may include a reference point 323, a lock indication 316a, and a safety indication 316b, wherein the reference point 323 is positioned between the front cap 320 , And the lock indication 316a and the safety indication 316b are displayed on the rear cap 310. [

The slider 322 is positioned on the third path 313c when the reference point 323 is positioned on the side of the safety indicator 316b and the slider 322 is positioned on the third path 313c when the reference point 323 is positioned on the side of the lock indication 316a. Can be made to be positioned on the locking groove 314, and it is possible to easily recognize whether or not the syringe assembly 1 is used through such an indicator (see Fig. 4 (D)).

4C and 4D, the lock indication 316a and the safety indication 316b are shown as being located inside the adjustment projection 324 and the adjustment projection 324 is made of a transparent material, The user can confirm the lock indication 316a and the safety indication 316b when holes for exposing the lock indication 316a and the safety indication 316b to the outside are formed.

6, the indicator may comprise a reference point 323, a lock indication 316a, a safety indication 316b and a neutral indication 316c. In this case, the indicator may be formed at a position not overlapping the guide groove 313.

As shown in Fig. 4 (C), the reference point in the state where the slider 322 is located at the front end of the first path 313a indicates the neutral display 316c as shown in Fig. 6 (B) 6 (A), when the slider 322 moves to the locking groove 314 while being positioned at the front end of the first path 313a as shown in Fig. 6 (D) Display 316a. When the slider 322 moves to the third path 313c while being positioned at the front end of the first path 313a, the reference point indicates the safety indicator 316b as shown in Fig. 6 (C).

Of course, the position and shape in which the reference point 323, the lock indication 316a, the safety indication 316b, and the neutral indication 316c are formed are not limited to those shown in Figs. 4 and 6. That is, the reference point 323, the lock indication 316a, the safety indication 316b, and the neutral indication 316c are displayed in a state in which the user can confirm the rotational position of the slider 322, 310 and the adjustment protrusion 324 and may be provided in various shapes such as a protruding shape, a concave shape, and a printed shape in the front cap 320 and the rear cap 310.

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

Therefore, when the slider 322 moves on the first path 313a toward the second path 313b, the third path 313c or the fourth path 313d, the slider 322 abuts on the locking projection 317 It stays on the second path 313b, the third path 313c or the fourth path 313d after passing over and prevents the slider 322 from moving again toward the first path 313a.

That is, the latching protrusion 317 is unintentionally moved in the state in which the slider 322 is moved toward the second path 313b, the third path 313c, or the fourth path 313d on the first path 313a, Thereby preventing the movable cover 322 from moving again toward the first path 313a and allowing the state of the shortest length, the longest length and the variable length of the protective lid 300 to be stably maintained.

On the other hand, as a measure for allowing the slider 322 to stably stay on the second path 313b or the third path 313c, it may be considered to form a large protruding degree of the locking projection 317, A large load (large moment) acts as long as the projecting length of the base 317 becomes longer. This structure can cause breakage of the locking projection 317.

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

The fixing protrusion 318 is formed on the rear cap 310 together with the locking protrusion 317 and is formed in the direction of reducing the width of the guide groove 313 on the second path 313b and / As shown in Fig. The locking protrusion 318 is also formed on the second path 313b when the locking protrusion 317 is formed on the second path 313b (and / or the third path 313c) 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 equal to the protruding length of the locking protrusion 317. [

The fixing protrusion 318 is positioned farther away from the first path 313a than the locking protrusion 317 and the protruding direction of the fixing protrusion 318 is opposite to the protruding direction of the locking protrusion 317.

The slider 322 comes close to or comes into close contact with the fixing protrusion 318 in a state in which the slider 322 stays on the second path 313b or the third path 313c after passing over the locking projection 317 So that the fixing between the rear cap 310 and the front cap 320 can be performed while minimizing the clearance.

The slider 322 can stably stay on the second path 313b or the third path 313c without increasing the degree of protrusion of the locking projection 317. As a result, It is possible to prevent the problem of breakage of the semiconductor device.

2B does not show the fixing protrusion 318 on the fourth path 313d, it is needless to say that the fixing protrusion 318 may also be formed on the fourth path 313d.

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 embodiments, but, on the contrary, It is obvious to those who have. Accordingly, it should be understood that such modifications or alterations should not be understood individually from the technical spirit and viewpoint of the present invention, and that modified embodiments fall within the scope of the claims of the present invention.

1: syringe assembly 100: syringe body
110: body 120: injection part
121: first fastening protrusion 121a: first inclined surface
121b: first engaging surface 200: needle assembly
210: hub 211: first fastening groove
211a: first corresponding inclined surface 211b: first corresponding engaging surface
212: second fastening protrusion 212a: second inclined surface
212b: second engaging surface 220: needle
300: protective cover 310: rear cap
311: second fastening groove 311a: second corresponding inclined surface
311b: second corresponding engagement surface 312: rear barrier
312a: through hole 313: guide groove
313a: first path 313b: second path
313c: third path 313d: fourth path
314: Locking groove 315:
316a: Lock indication 316b: Safety indication
316c: Neutral display 317:
318: Fixing projection 319: Indicator
320: front cap 321: front barrier
321a: Draw-out hole 322: Slider
323: Reference point 324: Adjusting projection
325: Indicator

Claims

A syringe main body including a body having a piston inserted therein and moving in a forward and backward direction, and an injection unit having a smaller diameter than the body in front of the body;
A needle assembly including a hub coupled to the injection portion and a needle projecting forwardly from the hub;
A rear cap formed in a cylindrical shape and surrounding a part of the needle, the rear cap being coupled to the injection section or the hub; And
And a front cap which is formed in a cylindrical shape and surrounds a part of the needle and is engaged with the rear cap to slide in the forward and backward directions and move in the circumferential direction to prevent movement in the forward and backward directions. .

The method according to claim 1,
At least one guide groove forming a path is formed on the outer peripheral surface of the rear cap,
A slider inserted into the guide groove and moving along the guide groove is formed on an inner circumferential surface of the front cap,
The guide groove
A first path extending along the front-rear direction;
A second path extending along a circumferential direction of the rear cap at a rear end of the first path;
A third path extending in a circumferential direction of the rear cap at a front end of the first path; And
And 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.

3. The method of claim 2,
Wherein the fourth path comprises at least two and is spaced apart from one another.

The method of claim 3,
Wherein the extending directions of the different fourth paths are different.

The method according to claim 1,
At least one guide groove forming a path is formed on the inner circumferential surface of the front cap,
A slider inserted into the guide groove and moving along the guide groove is formed on an outer circumferential surface of the rear cap,
The guide groove
A first path extending along the front-rear direction;
A second path extending along a circumferential direction of the rear cap at a rear end of the first path;
A third path extending in a circumferential direction of the rear cap at a front end of the first path; And
And 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.

3. The method of claim 2,
Wherein a locking groove provided on an extension of the third path and into which the slider is inserted and a locking protrusion provided between the third path and the locking groove are formed on an outer circumferential surface of the rear cap.

The method according to claim 6,
Wherein an indicator is formed on the rear cap and the front cap such that the front cap rotates about the circumferential direction of the rear cap to confirm whether the slider is inserted into the locking groove.

3. The method of claim 2,
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,
Wherein the slider is configured to ride over the locking protrusion so as to be able to remain on the second path, the third path or the fourth path.

9. The method of claim 8,
Wherein 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 protrusion direction of which is opposite to the locking protrusion,
Wherein the locking protrusion is located farther away from the first path than the locking protrusion.

10. The method of claim 9,
Wherein an indicator is formed on the rear cap and the front cap so that the front cap rotates in the circumferential direction of the rear cap to confirm whether the slider is inserted between the locking projection and the fixing protrusion. Assembly.

11. The method according to any one of claims 1 to 10,
The first fastening protrusion is formed in one of the injection unit and the hub and the first fastening groove is formed in the other one of the first fastening protrusion and the first fastening protrusion. The first fastening protrusion is inserted into the first fastening hole, The hub is prevented from moving forward relative to the injection section.

11. The method according to any one of claims 1 to 10,
A second fastening protrusion is formed on one of the hub and the rear cap and a second fastening groove is formed on the other of the hub and the rear cap to receive the second fastening protrusion and the second fastening protrusion is inserted into the second fastening groove, The rear cap is prevented from moving forward against the hub.

6. The method according to claim 2 or 5,
And an indicator is formed on the rear cap or the front cap so that the front cap rotates in the circumferential direction of the rear cap and the exposed length of the needle when the slider is inserted into the fourth path. Lt; / RTI >