KR102421258B1 - Safety syringe - Google Patents

Abstract

The present invention relates to a safety syringe, comprising: a syringe cylinder containing an injection solution; Needle support from which the injection needle is detachable; an adapter detachably coupled to one end of the syringe cylinder and detachably coupled to the needle support therein; a locking unit for locking the needle support to the adapter so that the injection needle protrudes from the adapter; a plunger reciprocally coupled within the syringe cylinder for introducing an injection solution into or out of the syringe cylinder through the injection needle; and a separation membrane detachably provided on the plunger and separated from the plunger when the locking part is unlocked.

Description

SAFETY SYRINGE

The present invention relates to a safety syringe, and more particularly, to a safety syringe that can be automatically withdrawn so as not to expose an injection needle after completion of injection.

In general, a syringe is used to inject a drug solution into the body for the purpose of treatment and prevention of diseases. In addition, the pharmaceutical department of large hospitals use syringes for mixing and manufacturing injection solutions.

However, in the conventional syringe, after the syringe is used, the syringe needle is exposed, so that common people, such as medical staff, patients, and cleaning personnel, are stabbed by the injection needle and become infected with pathogens.

To prevent this, several types of safety syringes are being sold as commercial products.

The conventional safety syringe adopts a method in which the needle is accommodated inside the syringe with a simple operation.

These safety injectors are divided into a manual operation method and an automatic operation method, but the automatic operation method is preferred, but has a disadvantage in that the product is more expensive.

The reason why the safety syringe of the conventional automatic operation method is more expensive than a general syringe is that more materials are used, the number of parts is large, the production price thereof is added, and the cost of assembling the parts occurs.

In addition, there is another disadvantage of the conventional safety injector, and many defective products occur because various parts are assembled.

Korea Patent Publication No. 10-1763425 (Title of the invention: universal safety syringe, registration date: 2017.07.25.)

The present invention is to solve the above problems, it is possible to automatically recover the injection needle so that the injection is not exposed after completion of the injection, it is possible to prevent infection by being pierced by the used injection needle, and a safety syringe that can be reused by replacing the injection needle The purpose of the invention provided.

In addition, another object of the present invention is to reduce the number of parts for automatically recovering injection needles, simplify the production process, reduce production costs, and improve reliability of products by reducing assembly defects of parts. do.

An object of the present invention is a syringe cylinder containing an injection solution; Needle support from which the injection needle is detachable; an adapter detachably coupled to one end of the syringe cylinder and detachably coupled to the needle support therein; a locking unit for locking the needle support to the adapter so that the injection needle protrudes from the adapter; a plunger reciprocally coupled within the syringe cylinder for introducing an injection solution into or out of the syringe cylinder through the injection needle; and a separator separably provided on the plunger and separated from the plunger when the locking portion is unlocked.

Here, the plunger unlocks the locking part after completion of the injection, so that the needle support is separated from the adapter and can be accommodated in the plunger together with the injection needle.

One or more hooks provided on the needle support to be pivotable toward the center of the needle support, the locking portion having a protruding protruding protrusion in the outer radial direction of the needle support at one end; and a locking groove provided in the adapter to rotatably engage the locking jaw of the hook.

The hook may include a protrusion protruding radially outwardly of the needle support, and the protruding protrusion may pivot toward a central axis of the needle support.

The plunger may include a pusher that slides into contact with the end of the protruding jaw of the hook toward the plunger and pivots the hook toward the central axis of the needle support to release the engaging jaw of the hook from the engaging groove. can

An end of the protruding jaw of the hook in contact with the pusher may be formed to protrude to be curved.

It may further include an elastic member provided between the adapter and the needle support to generate an elastic force so that the needle support moves toward the plunger when the locking part is unlocked.

A needle receiving portion in which the injection needle is accommodated may be formed inside the plunger.

It may further include a cutting unit provided in the adapter to open the needle receiving unit by cutting the separation membrane when the hook turns toward the central axis of the needle support.

The separator may be provided at a distance from the pusher so that the cutting unit cuts the separator when the hook turns toward the central axis of the needle support.

The separator may include a metal material or a synthetic resin material.

A sealing member provided on the needle support or the adapter to seal between the needle support and the adapter may be further included.

According to the present invention, the injection needle is automatically recovered so that the injection needle is not exposed after completion of the injection, it is possible to prevent infection by being pierced by the used injection needle, and the injection needle can be replaced and reused.

In addition, by configuring the part to detachably couple the needle support from which the injection needle is detachable to the syringe cylinder through the adapter, the number of parts for automatically recovering the injection needle is reduced, the production process is simplified, and the production cost is reduced, It can also improve the reliability of the product by reducing assembly defects.

1 is a perspective view of a safety syringe according to an embodiment of the present invention;
Figure 2 is an exploded perspective view of Figure 1;
Figure 3 is a perspective view of the needle support of Figure 2;
Figure 4 is a perspective view of the adapter of Figure 2;
5 is a longitudinal sectional view of FIG. 4;
Figure 6 is a perspective view of the plunger of Figure 2;
7 is a view showing a state in which the needle support and the adapter of FIG. 2 are assembled;
8 to 10 are views showing a process in which the locking jaw of FIG. 7 is released from the locking groove;
11 is a view showing a state after completion of injection of the safety injector according to an embodiment of the present invention.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the present embodiments allow the disclosure of the present invention to be complete, and those of ordinary skill in the art to which the present invention pertains. It is provided to fully inform those skilled in the art of the scope of the present invention.

The terminology used herein is for the purpose of describing the embodiments and is not intended to limit the present invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, “comprises” and/or “comprising” does not exclude the presence or addition of one or more other components in addition to the stated components. Like reference numerals refer to like elements throughout, and "and/or" includes each and every combination of one or more of the recited elements.

Unless otherwise defined, all terms (including technical and scientific terms) used herein will have the meaning commonly understood by those of ordinary skill in the art to which this invention belongs. In addition, terms defined in a commonly used dictionary are not to be interpreted ideally or excessively unless clearly specifically defined.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 to 10 show a safety injector according to an embodiment of the present invention.

As shown in these figures, the safety syringe 1 according to an embodiment of the present invention has a syringe cylinder 10 , a needle support 20 , an adapter 40 , a locking part 50 , and a plunger (70).

The syringe cylinder 10 has a hollow rod shape of a certain length. An injection solution for injection is accommodated inside the syringe cylinder 10 .

Hereinafter, for convenience of explanation, the end of the syringe cylinder 10 to which the adapter 40 is coupled is referred to as one end of the syringe cylinder 10 , and the opposite end of the syringe cylinder 10 is referred to as the other end of the syringe cylinder 10 . .

The needle support 20 is formed through a through hole 21 through which the injection solution passes therein, as shown in FIG. 3 .

The needle support 20 includes a support body 23 having a rod shape of a certain length. On the other hand, an elastic member 90 to be described later is mounted on the outer periphery of the support body 23 .

At one end of the support main body 23 facing the opposite side of the plunger 70, a needle attaching and detaching portion 25 from which the injection needle 5 is detachable is provided. The needle detachable part 25 is formed to protrude while forming a step with the support body 23 . The needle detachable portion 25 is formed to have an outer circumferential surface tapered along the longitudinal direction of the support body 23 to facilitate attachment and detachment of the injection needle 5 .

A protruding end 27 protruding at a predetermined height along the circumferential direction of the support body 23 is provided on the outer periphery of the other end of the support body 23 .

An O-ring is provided at the protruding end 27 as a sealing member 29 for sealing between the needle support 20 and the adapter 40 . Here, in the present embodiment, although the sealing member 29 is illustrated as being provided on the protruding end 27 of the needle support 20 , the present invention is not limited thereto, and the sealing member 29 may be provided inside the adapter 40 . may be

And, the protruding end 27 supports one end of the elastic member 90 mounted on the outer periphery of the support body (23).

In addition, at the other end of the support body 23 facing the plunger 70, the cross-sectional area is gradually reduced from the support body 23 and is formed to extend in length, that is, an extension formed to taper along the longitudinal direction of the support body 23. (31). As the outer periphery of the extension part 31 is tapered along the longitudinal direction of the support body 23, the hook 51 of the locking part 50 to be described later turns toward the center of the needle support 20, Interference between the extension part 31 and the hook 51 can be prevented.

As shown in FIG. 4 , the adapter 40 has a sleeve shape of a certain length with both sides open. The adapter 40 is detachably fitted to one end of the syringe cylinder 10, and the needle support 20 is detachably coupled therein.

Inside the adapter 40, a support coupling groove 41 through which the needle detachable part 25 of the needle support 20 penetrates and one end of the support body 23 is coupled is provided.

In addition, inside the adapter 40 , the sealing member 29 provided on the protruding end 27 of the needle support 20 is coupled while maintaining airtightness, and at the same time, the outer periphery of the support body 23 of the needle support 20 . An elastic member accommodating groove 45 is provided for supporting the other end of the elastic member 90 mounted to the . The elastic member receiving groove 45 communicates with the support coupling groove 41 .

The locking unit 50 locks the needle support 20 to the adapter 40 so that the injection needle 5 protrudes from the adapter 40 .

The locking part 50 includes a plurality of hooks 51 and a locking groove 61 .

The plurality of hooks 51 have a rod shape of a certain length. The plurality of hooks 51 are suspended and supported at the end of the protruding end 27 of the needle support 20 facing the plunger 70 . The plurality of hooks 51 are provided to protrude at the end of the protruding end 27 at a distance parallel to the central axis of the needle support 20 .

The plurality of hooks 51 pivot toward the central axis of the needle support 20 by pressing the plunger 70 .

On the other hand, one end of the hook 51 is provided with a locking protrusion 53 protruding in the outer radial direction of the needle support 20 . The locking jaw 53 is rotatably provided in the locking groove 61 , and is caught or released by the locking groove 61 .

The locking groove 61 is recessed to a predetermined depth in the inner periphery of the adapter 40 so that the locking jaw 53 is caught when the needle support 20 is locked to the adapter 40 .

Accordingly, as the locking jaw 53 of the hook 51 is caught in the locking groove 61, the needle support 20 and the adapter 40 are locked.

In addition, the hook 51 may further include a protruding jaw 55 .

The protruding jaw 55 is formed to protrude from one end of the hook 51 , for example, to the free end of the hook 51 in the outer radial direction of the needle support 20 . The protruding jaw end 55a facing the plunger 70 may be formed to protrude to be curved so as to slide in line contact with the pusher 71 of the plunger 70 to be described later.

The protrusion 55 of the hook 51 is accommodated and released in the protrusion receiving groove 62 which is recessed to a predetermined height from the end of the cutting part 80 to be described later.

As shown in FIG. 6 , the plunger 70 has a hollow rod shape with one side open. The plunger 70 is reciprocally coupled within the syringe cylinder 10 to introduce an injection solution into or out of the syringe cylinder 10 through the injection needle 5 . In addition, the plunger 70 unlocks the locking part 50 after completion of the injection.

The plunger 70 includes a pusher 71 for unlocking the locking part 50 , for example, releasing the locking jaw 53 of the hook 51 from the locking groove 61 .

A pusher 71 is provided along the perimeter of the opening of the plunger 70 towards the adapter 40 coupled to the syringe cylinder 10 .

Thus, in order to unlock the locking portion 50, as the plunger 70 is approached toward the needle support 20 mounted on the adapter 40, the pusher 71 of the plunger 70 is connected to the hook 51 ) in sliding contact with the end portion 55a of the protruding jaw, and at the same time, the hook 51 rotates in a state in which the locking jaw 53 of the hook 51 is caught in the locking groove 61, and the hook 51 moves the needle around the locking jaw 53. It pivots toward the central axis of the support 20 . Subsequently, when the hook 51 is rotated at a predetermined angle or more toward the central axis of the needle support 20 , the end of the hook 53 of the hook 51 is separated from the locking groove 61 of the hook 51 . The locking jaw 53 is released from the locking groove 61 , and the needle support 20 is unlocked from the adapter 40 .

In addition, the inside of the plunger 70, when the locking portion 50 is unlocked, a needle receiving portion 73 (refer to FIG. 8) in which the injection needle 5 is accommodated is formed.

The needle accommodating part 73 of the plunger 70 is provided with a separation membrane 75 that prevents the needle accommodating part 73 from being opened. The separation membrane 75 is detachably provided in the needle receiving portion 73 of the plunger 70, and is separated from the plunger 70 when the locking portion 50 is unlocked. The separator 75 may include a metal material or a synthetic resin material that can be cut by a cutting unit 80 to be described later. The separation membrane 75 may preferably include a stainless foil.

This separator 75 is mounted on the plunger 70 before the locking part 50 is unlocked, and the injection solution is introduced into the syringe cylinder 10 through the injection needle 5 or from the syringe cylinder 10 plays a role in excretion.

Meanwhile, the separation membrane 75 is cut by the cutting unit 80 provided in the adapter 40 .

The cutting part 80 has a ring-shaped blade with a sharp end. The cutting portion 80 has an outer diameter corresponding to the needle receiving portion 73 of the plunger 70, and is provided to protrude at a predetermined height from the end of the adapter 40 toward the plunger 70 toward the plunger 70. . The cutting part 80 is, when the pusher 71 of the plunger 70 comes into contact with the protrusion end 55a of the hook 51 to rotate the hook 51 toward the central axis of the needle support 20, The separation membrane 75 is cut in contact with the separation membrane 75 .

More specifically, by bringing the pusher 71 of the plunger 70 toward the protruding jaw 55 of the hook 51 of the needle support 20 , the hook 51 is the center of the needle support 20 . When the protrusion 55 is received and released from the protrusion receiving groove 65 by turning toward the axis, the cutting unit 80 cuts the separation membrane 75 .

Accordingly, the separator 75 is spaced apart from the pusher 71 and the plunger ( It is disposed in the needle receiving portion 73 of the 70).

On the other hand, the safety syringe 1 according to an embodiment of the present invention, an elastic member 90 for accommodating the needle support 20 unlocked from the adapter 40 into the inside of the plunger 70 by elastic force. include

The elastic member 90 is mounted on the support body 23 of the needle support 20 . When the needle support 20 is locked to the adapter 40 by the locking part 50 , one end of the elastic member 90 is supported by the protruding end 27 of the needle support 20 , and the other end thereof is the adapter. (40) supported by the end of the elastic member receiving groove (45), the elastic member (90) is accommodated in the elastic member receiving groove (45) of the adapter (40) in a compressed state. Here, although a coil spring is illustrated as the elastic member 90 in the present embodiment, the present invention is not limited thereto, and various types of elastic members generating elastic force for compression and tension may be provided as the elastic member 90 .

On the other hand, when the needle support 20 is unlocked from the adapter 40, the elastic member 90 mounted on the needle support 20 is tensioned by the elastic force. At this time, the needle support 20 supported by the elastic member 90 moves and accommodates the needle receiving part 73 of the plunger 70 by the elastic force of the elastic member 90 , and is mounted on the needle support 20 . The used injection needle 5 is also accommodated in the needle receiving portion 73 , so that the injection needle 5 is not exposed from the adapter 40 .

With this configuration, the process of injecting using the safety injector 1 according to an embodiment of the present invention will be described as follows.

First, as shown in FIG. 8 , the needle support 20 is pulled so that the hook 53 of the hook 51 of the needle support 20 on which the elastic member 90 is mounted is caught in the locking groove 61 . The adapter 40 is received and coupled. At this time, the needle support 20 is coupled to the adapter 40 so that the needle detachable portion 25 is exposed. In addition, the protrusion 53 of the hook 51 is accommodated in the protrusion receiving groove 65 .

Next, the adapter 40 to which the needle support 20 is coupled is coupled to one end of the syringe cylinder 10 .

Then, the injection needle 5 is mounted on the needle mounting portion of the needle support 20, completing the assembly of the safety syringe as shown in FIG.

Then, after inserting the plunger 70 into the other end of the syringe cylinder 10, the plunger 70 is reciprocally moved along the syringe cylinder 10, and the injection solution is transferred through the injection needle 5 into the syringe cylinder 10 ) into the

When the injection solution flows into the syringe cylinder 10, the plunger 70 is moved toward the needle support 20 for injection, and the injection solution accommodated in the syringe cylinder 10 is passed through the needle support 20 to the injection needle ( 5) is discharged through

And, when the injection of the injection solution is completed, the plunger 70 is further moved toward the needle support 20, and the pusher 71 of the plunger 70 is brought into sliding contact with the protruding jaw 55 of the hook 51. As shown in FIG. 9 , the hook 51 is pivoted toward the central axis of the needle support 20 . At this time, the locking jaw 51 of the hook 51 rotates while being caught in the locking groove 61 , and the protruding jaw 55 of the hook 51 is received and released from the protruding jaw receiving groove 65 , and the needle supporter Turn toward the central axis of (20).

On the other hand, when the protrusion 55 of the hook 51 is received and released from the protrusion receiving groove 65 , the cutting part 80 of the adapter 40 cuts the separator 75 of the plunger 70 . . At this time, since the protrusion end 55a of the hook 51 is curved, interference does not occur between the protrusion end 55a and the separation membrane 75 when the hook 51 turns.

If the plunger 70 is continuously moved toward the needle support 20, the hook 51 further pivots toward the central axis of the needle support 20, and the locking jaw 51 of the hook 51 engages the locking groove ( 61 , the needle support 20 is unlocked with the adapter 40 as shown in FIG. 10 .

As the needle support 20 and the adapter 40 are unlocked, the elastic member 90 mounted on the needle support 20 is tensioned by its own elastic force, as shown in FIG. It moves and accommodates the needle receiving part 73 of the plunger 70 . At this time, the injection needle 5 mounted on the needle support 20 is also accommodated in the needle receiving portion 73 , so that the injection needle 5 is not exposed from the adapter 40 .

That is, as the locking part 50 is unlocked with the plunger 70, the needle support 20 on which the injection needle 5 is mounted is an elastic member 90 provided between the needle support 20 and the adapter 40. It is automatically accommodated and recovered in the needle receiving portion 73 of the plunger 70 by the elastic force of the

As such, according to the present invention, the injection needle is automatically recovered so that the injection needle is not exposed after completion of the injection, it is possible to prevent infection by being pierced by the used injection needle, and the injection needle can be replaced and reused.

In addition, by configuring the part so that the needle support from which the injection needle is detachable is detachably coupled to the syringe cylinder through the adapter, the number of parts for automatically recovering the injection needle is reduced, the production process is simplified, and the production cost is reduced, It is possible to improve the reliability of the product by reducing assembly defects of the product.

Meanwhile, in the above-described embodiment, although it is illustrated that a plurality of locking jaws, protruding jaws, and protruding jaw receiving grooves are respectively provided, the present invention is not limited thereto, and one or more may be provided.

In addition, in the above-described embodiment, the separator is provided with a cutting unit and the separator is shown to be cut by the cutting unit when the needle holder is unlocked with the adapter, but is not limited thereto. When the lock is released, the separator may be cut by the elastic force of the elastic member.

As mentioned above, although embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art to which the present invention pertains can realize that the present invention can be embodied in other specific forms without changing its technical spirit or essential features. you will be able to understand Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

1: safety syringe
10: syringe cylinder
20: needle support
23: support body
25: needle removable part
29: sealing member
40: adapter
50: locking unit
51: hook
53: jamming jaw
55: protruding jaw
61: jamming groove
70: plunger
71: pusher
73: needle receiving portion
75: separator
80: cutting unit
90: elastic member

Claims (12)

a syringe cylinder containing an injection solution;
Needle support from which the injection needle is detachable;
an adapter detachably coupled to one end of the syringe cylinder and detachably coupled to the needle support therein;
a locking unit for locking the needle support to the adapter so that the injection needle protrudes from the adapter;
a plunger reciprocally coupled within the syringe cylinder for introducing an injection solution into or out of the syringe cylinder through the injection needle; and
a separation membrane detachably provided on the plunger and separated from the plunger when the locking part is unlocked;
The locking part,
It has a locking jaw protruding radially outward of the needle support at one end, and a protruding protrusion protruding in the outer radial direction of the needle support at the other end, provided on the needle support so as to be rotatable toward the center of the needle support. being one or more hooks; and
It is provided in the adapter and includes a locking groove for rotatably hooking the hooking jaw of the hook,
The plunger is in contact with the protruding jaw of the hook to release the engaging jaw of the hook from the engaging groove, a safety syringe. According to claim 1,
The plunger unlocks the locking portion after completion of the injection, so that the needle support is separated from the adapter and accommodated in the plunger together with the injection needle. delete delete According to claim 1,
The plunger is in sliding contact with the end of the protruding jaw of the hook toward the plunger and pivots the hook toward the central axis of the needle support, including a pusher for releasing the engaging jaw of the hook from the engaging groove, safety syringe. 6. The method of claim 5,
An end of the protruding jaw of the hook in contact with the pusher is formed to protrude to be curved, a safety syringe. According to claim 1,
The safety injector further comprising an elastic member provided between the adapter and the needle support to generate an elastic force so that the needle support moves toward the plunger when the locking part is unlocked. According to claim 1,
A safety syringe having a needle receiving portion in which the injection needle is accommodated inside the plunger. 9. The method of claim 8,
Provided in the adapter, the safety injector further comprising a cutting portion for cutting the separation membrane when the hook turns toward the central axis of the needle support to open the needle receiving portion. 6. The method of claim 5,
The separator is provided at a distance from the pusher so that a cutting unit provided on the adapter cuts the separator when the hook pivots toward the central axis of the needle support. According to claim 1,
The separator includes a metal material or a synthetic resin material, a safety syringe. According to claim 1,
A safety syringe provided on the needle support or the adapter, further comprising a sealing member for sealing between the needle support and the adapter.

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