KR20200059611A - Operating structure for safety filtering syringe - Google Patents

Abstract

The present invention relates to an operating structure of a safety filter syringe capable of drawing a needle into a chamber by the expansion force of an expansion spring, and is inserted into a chamber of a cylinder to move before and after to inject and withdraw the injection liquid, and A stopper provided on the outer periphery of the plunger, a stopper cap provided on the front surface of the stopper to catch the stopper, a stopper cap provided on the front side of the stopper cap, and a stopper and a locking sleeve provided as the stopper is inserted according to the advancement of the plunger, and the chamber It is provided in the interior of the stopper and includes an expansion spring to allow the sleeve to be locked.

Description

Operation structure of safety filter syringe {OPERATING STRUCTURE FOR SAFETY FILTERING SYRINGE}

The present invention relates to an operating structure of a safety filter syringe, and more particularly, to an operating structure of a safety filter syringe capable of introducing a needle into a chamber by an expanding force of an expansion spring.

In general, the syringe consists of a cylinder and a push pin inserted inside the cylinder, and an injection needle fixed tube coupled to the front end of the cylinder and an injection needle coupled to the injection needle fixed tube. After use, the injection needle protective cap is put on the injection needle and disposed of.

Therefore, in the process of disposing the syringe, a safety accident occurs in which the user, the doctor, the nurse, or the pulmonary syringe collector is stabbed in the needle, may be exposed to a serious risk of infection by infectious pathogens.

To solve this problem, a disposable safety syringe has recently been developed that isolates the injection needle into the cylinder.

As shown in Figures 1 and 2, the disposable safety syringe is coupled to the injection needle fixing tube 15 is inserted into the coupling tube 12 formed in the cylinder (11). In addition, the injection needle fixing tube 15 has a flange 15a formed along the outer circumferential surface of the rear end, which is restricted to the forward movement of the stepped portion formed at the connection portion of the cylinder 11 and the coupling tube 12. In addition, since the O-ring 19 fitted on the inner circumferential surface of the coupling tube 12 keeps the gap between the coupling tube 12 and the needle fixing tube 15 in an airtight state, the injection liquid filled inside the cylinder 11 It does not leak out through the gap between the injection needle fixing tube 15 and the coupling tube 12.

The disposable safety syringe pulls the push rod 13 backward while the injection needle 16 is mounted on the cylinder 11 to fill the injection liquid into the cylinder 11, and then pushes the push rod 13 forward to the patient. To the injection solution is administered, as shown in Figure 3, when the push bar 13 is completely moved to the front of the cylinder 11, the injection is completed and the locking piece 13a formed at the front end of the push bar 13 is elastic As it is deformed, it passes through the locking projections 15b of the injection needle fixing tube 15 and is inserted into the inside of the injection needle fixing tubes 15 to be hung on the locking projections 15b.

As described above, when the pusher 13 is pulled backward while the catching piece 13a is hung on the catching protrusion 15b, the pusher 13 leads the injection needle fixing tube 15 and moves backward, resulting in As shown in Fig. 4, the injection needle fixing tube 15 and the injection needle 16 are completely drawn into the cylinder 11.

Thereafter, when the cutting groove 18 formed in the push rod 13 approaches the rear end of the cylinder 11, a vertical force is applied to the rear end of the push rod 13 to cut the push rod 13.

And the cut rod 13 is inserted into the coupling tube 12 of the cylinder 11 to be bent into the inside of the cylinder 11 while bending the injection needle 16 located inside the cylinder 11.

Therefore, even if the cut rod 13 is taken out from the cylinder 11 again, it is impossible to pull the bent needle 16 out of the cylinder 11 through the coupling tube 12, so it is injected in the process of processing the used syringe. Not only does the accident of being stuck in the needle 16 not occur at all, even if the injection needle 16 is pulled out of the cylinder 11, since the injection needle 16 is already in a largely damaged state, reuse is fundamentally impossible. .

However, the conventional disposable safety syringe as described above is formed by a locking piece 13a at the center of the front end of the push bar 13, so that a filter is provided according to the pressing of the locking piece 13a when a filter is provided inside the needle fixing tube 15. There was a problem that the use of the filter was limited due to tearing.

Republic of Korea Registered Patent Publication No. 10-1282290

Therefore, the present invention has been devised to solve the above-mentioned problems, and the purpose thereof is to dispose of the sleeve provided with the filter unit when the stopper provided on the outside of the plunger holds the syringe by the expansion force of the expansion spring and then discards it. It is possible to provide a working structure of a safety filter syringe that can maximize the convenience of use because the needle can be easily drawn into the chamber.

The operating structure of the safety filter syringe according to the embodiment of the present invention for achieving the above object is inserted into the chamber of the cylinder and is provided on the front outer periphery of the plunger moving forward and backward to inject and withdraw the injection solution. A stopper, a stopper cap provided on the front surface of the stopper to catch the stopper, a stopper cap provided on the front surface of the stopper cap and inserted into the stopper according to the advance of the plunger to lock the stopper and the sleeve, and the stopper provided inside the chamber It may include an expansion spring that allows the locking sleeve to be retracted.

A support jaw may be provided on the front side of the cylinder by bending inward to support the expansion spring.

The support jaw may be provided on the entire circumferential surface or may be provided in a plurality at regular intervals.

The expansion spring is provided on the front of the sleeve, but may be provided in close contact with the inner wall surface of the chamber.

A support piece for supporting the sleeve may be provided on the inner wall surface of the cylinder to prevent the sleeve from retracting due to the expansion force of the expansion spring.

The support piece may be provided by cutting a portion of the inner wall surface of the cylinder, but the sleeve may be stopped and the stopper cap may be pressed according to the advancement of the plunger so that the sleeve can be retracted into the chamber so that the sleeve can retract and the lower part can be integrated into the cylinder.

As described above, according to the operating structure of the safety filter syringe according to the present invention, the stopper and the sleeve are locked after the use of the injection liquid is completed by being provided with an expansion spring so as to retract the sleeve connected to the needle in the chamber of the cylinder Since the sleeve is automatically retracted by the expansion force of the expansion spring in the state in which the injection needle can be positioned in the chamber, there is an effect to maximize convenience for the user.

1 is an exploded perspective view showing an example of a general disposable safety syringe.
FIG. 2 is a cross-sectional view of FIG. 1;
3 and 4 are cross-sectional views showing a state of use of a conventional disposable safety syringe, respectively.
Figure 5 is an exploded perspective view showing the overall configuration of the operating structure of the safety filter syringe according to the present invention.
Figure 6 is an exploded perspective view showing the operating structure of the safety filter syringe according to the present invention.
7 is an enlarged perspective view showing the operation structure of the safety filter syringe according to the present invention.
8 is a cross-sectional view showing the operating structure of the safety filter syringe according to the present invention.
9 is a cross-sectional view showing a state in which the injection liquid is discharged in the operating structure of the safety filter syringe according to the present invention.
10 is a cross-sectional view showing a state for pulling the injection needle into the chamber in the operating structure of the safety filter syringe according to the present invention.
11 is a cross-sectional view showing a state in which the needle is placed into the chamber in the operating structure of the safety filter syringe according to the present invention.

The present invention can be applied to various changes and can have various embodiments, and specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In the drawings, the embodiments of the present invention are not limited to the specific form shown and are exaggerated for clarity. Although specific terms are used in this specification, they are used for the purpose of describing the present invention, and are not used to limit the scope of the present invention described in the meaning or the claims.

In this specification, the expression 'and / or' is used to mean including at least one of the components listed before and after. Also, the expression 'connected / combined' is used as a meaning including directly connected to other components or indirectly connected through other components. In the present specification, the singular form also includes the plural form unless otherwise specified in the phrase. Also, components, steps, operations and elements referred to as 'comprising' or 'comprising' as used in the specification mean the presence or addition of one or more other components, steps, operations and elements.

In addition, expressions such as 'first, second', etc. are expressions used only for distinguishing a plurality of components, and do not limit the order or other features between components.

In the description of the embodiments, each layer (membrane), region, pattern or structure may be "on / on" or "under / under" the substrate, each side (membrane), region, pad or pattern. The term "formed on" includes all formed directly or through another layer. The criteria for top / bottom or bottom / bottom of each layer are described based on the drawings.

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

Figure 5 is an exploded perspective view showing the overall configuration of the operating structure of the safety filter syringe according to the present invention, Figure 6 is an exploded perspective view showing the operating structure of the safety filter syringe according to the present invention, Figure 7 is according to the present invention 8 is an enlarged perspective view showing the operation structure of the safety filter syringe, and FIG. 8 is a cut-away view showing the operation structure of the safety filter syringe according to the present invention, and FIG. 9 shows the injection solution in the operation structure of the safety filter syringe according to the present invention. It is a cutaway view showing a discharged state, and FIG. 10 is a cutaway view showing a state for pulling a needle into a chamber in the operating structure of the safety filter syringe according to the present invention, and FIG. 11 is a safety filter syringe according to the present invention It is a cross-sectional view showing a state in which the injection needle is located in the chamber in the operating structure of.

5 to 11, the locking structure of the safety filter syringe according to the present invention includes a cylinder 100, a plunger 200, a stopper 300, a cap rubber 400, and a gasket 500 ), The sleeve 600, the filter unit 700, the stopper cap 800, and the expansion spring 900.

The cylinder 100 is formed with a chamber 110 through which the injection solution is accommodated through the injection needle 10.

In addition, the cylinder 100 is made of a cylindrical pipe shape with front and rear surfaces open, and is made of a transparent material such as synthetic resin or glass.

A support jaw 120 is provided on the front surface of the cylinder 100 to prevent the expansion spring 900 described below from being disengaged.

The support jaw 120 is bent at the inside to be provided at a right angle.

In addition, the support jaw 120 may be provided on the entire circumferential surface of the cylinder 100 or may be formed in a plurality at a predetermined interval on the circumferential surface of the cylinder 100.

In addition, the inner wall surface of the cylinder 100 is provided with a support piece 130 so as to support the sleeve 600 so that the sleeve 600 does not retreat but temporarily stops despite the expansion force of the expansion spring 900. .

The support piece 130 is provided by cutting a portion of the inner wall surface of the cylinder 100.

In addition, the support piece 130 stops the sleeve 600 and the stopper cap 800 presses toward the inner wall surface of the cylinder 100 according to the advancement of the plunger 200 so that the sleeve 600 can retract. The lower portion is provided integrally with the cylinder 100 in a curved state into the 110.

That is, the sleeve 600 is brought into contact with the support piece 130 by providing the support piece 130 to bend inward while the lower part is integrated and the upper part is separated on the inner wall surface of the cylinder 100. You will be able to support them not to retreat.

The plunger 200 is inserted into the chamber 110 of the cylinder 100 so that it can be moved back and forth to inject and withdraw the injection solution.

The stopper 300 is provided on the outside of the front of the plunger 200 and is caught with the sleeve 600 to pull the injection needle 10 into the chamber 110.

In addition, the stopper 300 is integrally provided with the plunger 200 in a state where the center is empty, and an incision 310 is formed to be cut around the outer periphery.

The incision part 310 is formed in a plurality of spaced intervals up and down.

The upper outer circumference of the stopper 300 is provided with an upper locking jaw 320 that can be caught by the sleeve 600 and pull the sleeve 600.

In addition, the upper locking jaw 320 is made in a "∠" shape to taper outward.

That is, as the stopper 300 is fitted into the sleeve 600, the upper hooking jaw 320 is smoothly caught by the second catching piece 610 of the sleeve 600 described below to chamber the injection needle 10. It is possible to pull the sleeve 600 to position it into the (110).

In addition, the lower outer circumference of the stopper 300 is provided with a lower locking jaw 330 that is double-hung on the stopper cap 800 together with the sleeve 600.

In addition, the lower locking jaw 330 is made in a "∠" shape to taper outward.

That is, the upper locking jaw 320 is caught in the sleeve 600 and the lower locking jaw 330 is once again caught by the stopper cap 800, thereby preventing the malfunction as much as possible.

The cap rubber 400 is inserted into the stopper 300 so that the injection liquid can be discharged to the injection needle 10.

In addition, the cap rubber 400 is made of a rubber material, and is provided with a flat outer surface to prevent tearing of the filter unit 700 even when the cap rubber 400 contacts the filter unit 700.

The gasket 500 is coupled to the outside of the front surface of the plunger 200, and is made of an elastic rubber material.

The sleeve 600 is inserted into the front in the chamber 110 and coupled to the support 20 to which the injection needle 10 is fitted, and after the use of the injection solution is completed, the stopper 300 and the injection needle 10 are hung in the chamber ( 110) It is pulled into.

An upper needle jaw 320 of the stopper 300 is caught on the inner surface of the sleeve 600 to place the injection needle 10 connected to the sleeve 600 in the chamber 110 according to the pulling of the plunger 200. So that the second catching piece 610 is provided.

The second catching piece 610 is made by cutting a portion of the wall surface of the sleeve 600 and bending it at right angles to the inside.

In addition, the second catching piece 610 may be provided in plural on each side so that the upper catching jaw 320 of the stopper 300 can be stably caught.

That is, the second catching piece 610 is bent at a right angle to the inside of the sleeve 600 to protrude so that the plunger 200 is pushed to draw the injection needle 10 into the chamber 110 after the use of the syringe is completed. When the upper stopper (320) of the stopper (300) passes through the front side of the second catching piece (610), the support needle (20) combined with the injection needle (10) is pulled together with the sleeve (600) and the injection needle 10 is drawn into the chamber 110.

In addition, a fitting groove 620 is formed in the outer circumference of the sleeve 600 so that the O-ring 30 for preventing the leakage of the injection liquid can be fitted.

The filter unit 700 may be inserted into the sleeve 600 to filter foreign substances contained in the injection liquid flowing into the chamber 110.

Since the filter unit 700 is already widely used, detailed description of the structure and operation state thereof will be omitted.

The stopper cap 800 is provided between the stopper 300 coupled to the chamber 110 and the sleeve 600, and when the stopper 300 grasps and pulls the sleeve 600 after completion of the use of the syringe, the stopper cap 800 is attached to the stopper 300. It will hang and walk one more time.

The stopper cap 800 is formed in the same cylindrical shape as the inner diameter of the chamber 110 to be in close contact with the inside of the chamber 110.

In addition, the stopper cap 800 is formed with an upper incision groove 810 that is cut at a predetermined interval on the upper portion, and a lower incision groove 820 is formed at a predetermined interval, which is staggered from the upper incision groove 810. Lose.

In addition, the stopper cap 800 is provided with a first catching piece 830 on which the lower catching jaw 330 of the stopper 300 is applied to the inside of the bottom surface where the lower cutting groove 820 is formed.

The first catching piece 830 is bent at a right angle to the inside of the stopper cap 800 to be provided around the entire bottom surface.

That is, as the first catching piece 830 is provided on the stopper cap 800, when the stopper 300 is inserted into the sleeve 600, the lower catching jaw 330 is attached to the first catching piece 830. It is caught and the upper locking jaw 320 is caught by the second locking jaw 610 so that the stopper 300 and the sleeve 600 are doubled so that no malfunction occurs.

The expansion spring 900 is provided inside the chamber 110 to retract the sleeve 600 that is locked with the stopper 300 to draw the injection needle 10 into the chamber 110.

In addition, the expansion spring 900 is provided on the front surface of the sleeve 600, but is provided in close contact with the inner wall surface of the chamber 110 so that it is not detached by the support jaw 120.

In other words, the expansion spring 900 is provided at the front of the sleeve 600 in the chamber 110, but the sleeve 600 does not retract even with the expansion force of the expansion spring 900 by the support piece 130, and the plunger When the stopper cap 800 presses the base piece 130 according to the advancement of the 200 and the stopper 300 is locked with the plunger 200, the sleeve 600 is automatically adjusted by the expansion force of the expansion spring 900. By retracting, the needle 10 connected to the sleeve 600 is drawn into the chamber 110.

Looking at the operating state according to the safety filter syringe of the present invention made of the above structure is as follows.

The plunger 200 coupled to the inside of the cylinder 100 is retracted in the axial direction to fill the injection liquid through the injection needle 10 into the cylinder 100, and the plunger 200 is advanced in the axial direction to scan The injection liquid can be injected into the human body through the needle 10.

At this time, when filling or discharging the injection liquid into the cylinder 100, the foreign substance contained in the injection liquid can be filtered while the injection liquid passes through the filter unit 700 to prevent secondary infection due to injection of the injection liquid. It becomes possible.

And, when the plunger 200 is to move forward in the cylinder 100, a stopper 300 is provided outside the front surface of the plunger 200, and a cap rubber 400 is inserted into the stopper 300. As the stopper 300 is inserted into the sleeve 600, the stopper 300 does not contact the filter unit 700 but the rubber rubber cap rubber 400 comes into contact with the filter unit 700 so that the filter unit 700 is not torn. It does not.

As such, when the stopper 300 is inserted into the sleeve 600 by advancing the plunger 200 to inject the injection liquid into the human body through the injection needle 10, the stopper 300 of the filter unit 700 The filter unit 700 is not damaged even when the injection of the injection solution is completed because the filter unit 700 leaves the filter unit 700 while advancing outwardly and comes into contact with the inner surface of the sleeve 600.

Accordingly, the stopper 300 does not contact the filter unit 700 and the plunger 200 can inject all the injection liquid inside the cylinder 100 without the occurrence of interference, after which damage to the filter unit 700 It does not occur, allowing repeated use of the safety filter syringe.

In addition, when the use of the safety filter syringe is completed and the syringe is to be discarded, the lower locking jaw 330 of the stopper 300 is the first of the stopper cap 800 when the plunger 200 is advanced as far as possible. It is primarily caught by the engaging piece 830.

In addition, when the plunger 200 continues to advance, the stopper 300 is coupled into the sleeve 600 and the upper locking jaw 320 is secondarily caught by the second catching piece 610.

On the other hand, as the stopper cap 800 moves forward as the stopper cap 800 advances according to the advancement of the plunger 200, the stopper cap 800 moves forward while pressing the support piece 130 supporting the sleeve 600, and the stopper ( 300) When the plunger 200 is released while the sleeve 600 is locked, the expansion spring 900 pushes the sleeve 600 by the expansion force of the expansion spring 900 while the sleeve 600 retracts. The injection needle 10 connected to the sleeve 600 is positioned into the chamber 110.

Therefore, the upper and lower hooking jaws 320 and 330 of the stopper 300 are double caught by the second catching piece 610 of the sleeve 600 and the first catching piece 830 of the stopper cap 800, respectively. The sleeve 600 and the injection needle 10 are automatically placed into the chamber 110 by the expansion spring 900 so that the user needs to hold the cylinder 100 with one hand and pull the plunger 200 with the other hand. If the plunger 200 is released while the cylinder 100 is held with one hand, the plunger 200 is automatically retracted and convenient to use, and then the safety filter syringe can be safely collected and disposed.

As described above, the present invention is not limited to the specific preferred embodiments described above, and any person having ordinary knowledge in the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims Of course, modifications are possible, and such changes are within the scope of the claims.

10: needle 20: support
30: O-ring 100: cylinder
110: chamber 120: support jaw
130: base 200: plunger
300: stopper 310: incision
320: upper locking jaw 330: lower locking jaw
400: cap rubber 500: gasket
600: sleeve 610: second catch
620: fitting groove 700: filter unit
800: stopper cap 810: upper incision groove
820: lower incision groove 830: first catch
900: expansion spring

Claims (6)

A plunger inserted into the chamber of the cylinder and moving forward and backward to inject and withdraw the injection solution;
A stopper provided on the front outer surface of the plunger;
A stopper cap provided on the front surface of the stopper to catch the stopper;
A sleeve provided on the front of the stopper cap and being locked with the stopper while the stopper is inserted according to the advancement of the plunger; And
Operation structure of the safety filter syringe comprising; an expansion spring provided inside the chamber to allow the stopper and the sleeve to be locked to retract. According to claim 1,
Operation structure of the safety filter syringe, characterized in that the front of the cylinder is provided with a support jaw by bending inward to support the expansion spring. According to claim 2,
The support jaw is provided on the entire circumferential surface or a plurality of spaced apart at a predetermined interval, the operating structure of the safety filter syringe, characterized in that provided. According to claim 1,
The expansion spring is provided on the front side of the sleeve, the operating structure of the safety filter syringe, characterized in that provided in close contact with the inner wall surface of the chamber. According to claim 1,
The inner wall surface of the cylinder is provided with a support piece for supporting the sleeve so that the sleeve does not retract by the expansion force of the expansion spring operating structure of the safety filter syringe. The method of claim 5,
The support piece is provided by cutting a portion of the inner wall surface of the cylinder, but the sleeve is stopped and the stopper cap is pressed according to the advancement of the plunger. Working structure of filter syringe.

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