KR102523132B1 - Emergency intravenous injection syringe - Google Patents

Abstract

The present invention relates to an intravenous injection injector, comprising: an injection unit 100 having an injection body 110 having a fixed amount of intravenous injection and a needle 115 coupled therein; It is characterized in that it includes an injection fixing forceps 200 detachably coupled to the genital organ, coupled to the injection part 100, and having a needle insertion long hole 240 through which the needle 115 is inserted into the skin of the genital organ. to be

Description

Emergency intravenous injection syringe {Emergency intravenous injection syringe}

The present invention relates to an intravenous injection injector, and more particularly, to an emergency intravenous injection injector that enables a non-specialist to easily inject an intravenous injection through the genitals of an emergency patient.

A defibrillator provides a strong electric shock directly or indirectly to the heart of a patient who has suffered ventricular fibrillation, ventricular tachycardia, or sudden cardiac arrest, which can cause death, and instantly depolarizes the entire myocardium to restore the heart to normal rhythm. It is an essential emergency medical device that helps the patient survive by restoring it to the heart and enabling the smooth flow of blood through the heart.

However, heart disease most often occurs in situations that patients and their neighbors cannot predict, and in particular, when heart disease suddenly occurs, first aid should be provided as quickly as possible on site to increase the probability of survival.

Accordingly, in recent years, automatic external defibrillators, which are medical devices that resuscitate the heart of patients with heart disease by applying electric shocks, have been installed in public places so that anyone can easily treat patients in an emergency.

It has been reported that when an electric shock is applied to a patient using such a defibrillator, when inotrophics are administered, the heart recovers significantly faster than when inotrophics are not administered.

However, since the cardiotonic agent must be injected intravenously, it is difficult for an ordinary person who is not a hospital expert to inject the intravenous agent into a patient in an emergency.

In addition to injecting the cardiotonic agent to the heart attack patient described above, when an emergency occurs in daily life, it is difficult for a non-specialist to quickly find a venous blood vessel and inject the intravenous agent in a non-hospital place.

An object of the present invention is to solve the above-mentioned problems, to provide an intravenous injection syringe that allows non-professionals to easily inject intravenous drugs into the male genitals where veins are gathered.

The above objects and various advantages of the present invention will become more apparent from preferred embodiments of the present invention by those skilled in the art.

The above object of the present invention can be achieved by an intravenous injection syringe for administering an intravenous drug to the genitals. The intravenous injection injector of the present invention includes an injection unit 100 having an injection body 110 having a fixed amount of intravenous injection and a needle 115 coupled therein; It is characterized in that it includes an injection fixing forceps 200 detachably coupled to the genital organ, coupled to the injection part 100, and having a needle insertion long hole 240 through which the needle 115 is inserted into the skin of the genital organ. to be

According to one embodiment, an injection receiving block 250 is formed in the injection fixing tongs 200, the injection portion 100 is accommodated in the injection receiving block 250, and the injection portion 100 is A cylinder 111 in which intravenous injections are accommodated, a piston 113 descending inside the cylinder 111, and pressurization protruding from the top of the piston 113 and exposed to the outside of the injection receiving block 250 A knob 130 may be included.

According to one embodiment, the injection unit 100 includes a pair of leg portions 120 extending downward on both sides of the injection body 110, and the injection fixing tongs 200 are formed on the plate surface. The lower part of the pair of leg parts 120 may include a leg insertion groove 230 coupled thereto.

According to one embodiment, the injection fixing tongs 200 are provided to be folded or widened to each other on both sides around the rotation axis 220, and a pair of tongs plates to which the tongs handles 211 and 211a are coupled at the top. 210 and 210a, and a pair of leg insertion grooves 230 are formed along the longitudinal direction of the penis at the upper end of the pair of clamp plates 210 and 210a, and the needle insertion long hole 240 is A predetermined length may be formed along the circumferential direction from the lower end of the clamp plates 210 and 210a.

According to one embodiment, the leg portion 120 includes a pair of insertion rollers 125 inserted into the pair of leg insertion grooves 230; a pair of lower legs 121 fixedly coupled to the pair of insertion rollers 125; The lower part is fixedly coupled to the lower leg 121 and the upper part includes a pair of upper legs 123 fixedly coupled to the outer circumferential surface of the injection body 110, and the lower leg 121 and the upper leg 123 ) is bent at an angle at which the needle 115 can be inserted into the corpus cavernosum when the insertion roller 125 is rotated toward the needle insertion long hole 240 in a state of being inserted into the leg insertion groove 230.

According to one embodiment, the injection body 110 is coupled to a cylinder 111 in which intravenous injections are accommodated, a piston 113 coupled to an upper portion of the cylinder 111, and a lower portion of the cylinder 111 It includes a needle 115 for injecting an intravenous drug (C) into the patient's body, and a protrusion 111a protruding inward is provided at the upper end of the inner wall surface of the cylinder 111, and the outer wall surface of the piston 113 A piston movement limiting slit 114 into which the protrusion 111a is inserted is formed with a certain length vertically, and the piston movement limiting slit 114 includes an insertion slit 114a formed with a certain length in the vertical direction from the bottom; a position limiting jaw 114b which is formed to a certain length in a horizontal direction at an upper end of the insertion slit 114a and restricts insertion of the piston 113; It may include an injection guide slit 114c formed from the other end of the position limiting jaw 114b to an upper portion to guide the piston 113 to descend into the cylinder 111.

The intravenous injection injector of the present invention enables an emergency patient to inject an intravenous drug into the male genital area where veins are gathered without having to find a vein that is difficult for non-professionals to find. Accordingly, it is possible to quickly and conveniently inject an intravenous drug without delaying the emergency patient.

At this time, when a non-professional injects, the injection fixing tongs are coupled to the penis so that the injection unit can be prevented from shaking and the injection needle can be inserted vertically into the corpus cavernosum of the penis, the injection unit is placed on the injection fixing tongs, and then applied to the intravenous injection. to inject

Accordingly, the user can inject by pressing only the piston without needing to separately fix the injection unit.

In this process, the injection unit forms a piston movement restriction slot so that the piston can descend according to the injection volume of the intravenous injection, so that even non-professionals can inject the intravenous injection with an accurate dose.

1 is an exemplary view showing the process of injecting an intravenous drug to the genital tract with an intravenous drug injector according to the present invention;
2 is a perspective view showing the configuration of an intravenous injector according to the present invention;
Figure 3 is a perspective view showing the configuration of the injection unit of the intravenous injection injector according to the present invention;
Figure 4 is an exploded perspective view and cross-sectional view of the injection unit of the intravenous injection injector according to the present invention;
5 and 6 are exemplary diagrams showing the operation process of the intravenous injection syringe device according to the present invention;
7 is an exemplary view showing each process of injecting an intravenous drug into the genital organ by the intravenous drug injector according to the present invention;
8 is a cross-sectional example showing a state in which the injection unit of the intravenous injection injector according to the present invention injects the intravenous injection into the genital organs;
9 is a perspective view showing the configuration of an intravenous injection injector according to another embodiment of the present invention.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the examples described in detail below. This embodiment is provided to more completely explain the present invention to those skilled in the art. Therefore, the shapes of elements in the drawings may be exaggerated to emphasize a clearer description. It should be noted that in each drawing, the same members are sometimes indicated by the same reference numerals. Detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention are omitted.

1 is an exemplary view showing the process of injecting an intravenous injection by coupling the intravenous injection injector 1 according to the present invention to the patient's genital organ A, and FIG. 2 is an intravenous injection injector according to the present invention (1 ) is a perspective view showing the configuration of.

As shown, the intravenous injection injector 1 according to the present invention is detachably coupled to the injection unit 100 for injecting the intravenous injection and the genital organ A, so that the user can use the injection unit 100 to ) and an injection fixing tongs 200 for fixing the position of the injection unit 100 to the genital organ A so as to be able to inject intravenous drugs.

The corpus cavernosum is an organ of the male genital organ. A large number of veins are located in this corpus cavernosum. The intravenous drug injector 1 of the present invention injects the intravenous drug into the corpus cavernosum located in the genital organs so that non-professionals who have difficulty finding the vein can easily inject the intravenous drug into the patient.

To this end, the injection unit 100 accommodates the amount of intravenous injection that must be injected into a heart attack patient, and the injection fixing tongs 200 are detachably coupled to the genital organ A, and the injection unit 100 is not shaken to the genitals. The position of the injection unit 100 is supported so that the needle is inserted in the vertical direction. As a result, the position of the injection unit 100 is stably fixed even if a non-professional does not hold the injection unit 100 by hand, and the user presses only the piston 113 of the injection unit 100 to inject a fixed amount of the intravenous injection intravenously. You can do it.

Figure 3 is a perspective view showing the configuration of the injection unit 100 of the present invention, Figure 4 (a) is an exploded perspective view showing the configuration of the injection unit 100 is disassembled, Figure 4 (b) is a scan It is a cross-sectional view showing the cross-sectional configuration of the portion 100.

As shown, the injection unit 100 is coupled to the cylinder 111 in which the intravenous drug (C) is accommodated, the piston 113 coupled to the upper part of the cylinder 111, and the lower part of the cylinder 111, (C) includes an injection body 110 including a needle 115 for injecting into the patient's body.

The cylinder 111 and the piston 113 are preferably formed in a small size corresponding to the capacity of the intravenous injection (C) so that they can be coupled to the injection fixing forceps 200. A protrusion 111a is formed on the upper part of the inner wall surface of the cylinder 111 to protrude. The protrusion 111a is inserted into the piston movement limiting slit 114 of the piston 113 to limit the movement of the piston 113.

The upper end of the cylinder 111 is provided with a cylinder flange 111b extending a certain area outward in the radial direction. The cylinder flange 111b comes into contact with the pressure plate 113a when the piston 113 descends and limits the descending depth of the piston 113.

A needle coupling tube 111c is formed to protrude from the lower portion of the cylinder 111, and the injection coupling tube 115a of the needle 115 is coupled.

The piston 113 is inserted into the cylinder 111, descends inside the cylinder 111 by a user's pressurization, and the intravenous agent C in the cylinder 111 is discharged through the needle 115. At the top of the piston 113, a pressure plate 113a is formed larger than the outer diameter of the piston 113.

A rubber packing 113b is provided below the piston 113. The rubber packing 113b applies frictional force to the inner wall surface of the cylinder 111 so that the piston 113 descends inside the cylinder 111 at a slow speed.

Although not shown in the drawings, a protruding protrusion or a recessed slit may be formed on the top of the piston 113 so that the user can easily rotate the piston 113 .

A piston movement limiting slit 114 is formed on the outer wall surface of the piston 113 along the height direction. The piston movement limiting slit 114 includes an insertion slit 114a formed vertically upward with a predetermined length from the rubber packing 113b, and a position limiting jaw 114b formed with a predetermined length horizontally from the top of the insertion slit 114a. , and a scan guide slit 114c formed vertically from the end of the position limiting jaw 114b to the pressure plate 113a.

As shown in (b) of FIG. 4, a protrusion 111a is inserted into the piston movement limiting slit 114. The piston 113 is inserted into the cylinder 111 while the protrusion 111a is inserted into the insertion slit 114a. When the protrusion 111a moves upward through the insertion slit 114a and reaches the position limiting jaw 114b, it is caught on the position limiting jaw 114b and its movement is restricted.

Accordingly, the descent of the piston 113 is restricted unless the user rotates the piston 113 so that the protrusion 111a is positioned coaxially with the injection guide slit 114c.

Since the intravenous injection injector 1 of the present invention is stored together with the defibrillator, the piston 113 is lowered by an external shock and the piston movement restriction slot is provided to prevent the intravenous injection C from being discharged through the needle 115. (114) is formed. That is, the protrusion 111a is stored together with the defibrillator in a state where it is hung on the position limiting jaw 114b to safely prevent the discharge of the intravenous agent C, and the piston immediately before the user injects the intravenous agent C to the patient. (113) is rotated and used.

On the other hand, in the piston movement limiting slit 114 of the present invention, the position limiting jaw 114b serves only to prevent the piston 113 from descending, but may be formed in a stepped multi-stage form in some cases. The multi-stage piston movement limiting slit 114 may be used for adjusting the injection capacity of the intravenous drug (C).

That is, the first vertical slit is formed so that the piston 113 descends by the amount of the basic amount of the intravenous drug (C) based on each step from the bottom, and the first horizontal slit is formed at the end of the first vertical slit, It may be formed in the form of a second vertical slit corresponding to the second additional injection dose, a second horizontal slit, and a third vertical slit corresponding to the third additional injection dose.

If the patient's condition is not improved even after administering the basic injection dose, the user may rotate the piston 113 to the horizontal slit and then lower the piston by the next vertical slit to additionally administer the intravenous injection.

Thereby, there is an effect that a non-professional can quickly additionally administer the intravenous injection without professional knowledge about the administration dose of the intravenous injection.

The leg part 120 is provided on the cylinder 111 of the injection body 110 and allows the injection body 110 to be coupled to the injection fixing tongs 200. The leg part 120 guides the needle 115 to be directly moved to a position where the needle 115 can be inserted into the corpus cavernosum of the penis in a state where the injection body 110 is stably fixed to the injection clamp 200. .

As shown in FIG. 3, a pair of leg parts 120 are provided on both sides of the injection body 110. The leg part 120 includes a lower leg 121, an upper leg 123 connecting the lower leg 121 and the injection body 110, and an insertion roller 125 coupled to the lower part of the lower leg 121. include

Here, the lower leg 121 is fixedly coupled to the lower portion of the upper leg 123 by a lower joint 122 . In addition, the upper part of the upper leg 123 is fixedly coupled to the cylinder 111 by the upper joint 124.

The lower leg 121 and the upper leg 123 are coupled to be bent at a predetermined angle (θ) as shown in FIG. 3 by the lower joint 122 . The bent angle θ of the lower leg 121 and the upper leg 123 is the insertion roller 125 in the leg insertion groove 230 of the injection fixing tongs 200, as shown in (a) of FIG. As shown in (b) of FIG. 7 in the coupled state, when the leg part 120 is rotated to the side of the penis A, the needle 115 is formed at an angle that can be directly inserted into the corpus cavernosum B. do.

As a result, the user does not need to separately adjust the position of the injection unit 100 or the angle of the leg unit 120, and the user rotates the leg unit 120 to the side of the penis while inserting it into the injection clamp unit 200. Only this allows the needle 115 to be inserted into the corpus cavernosum B where the vein is located. Therefore, even non-specialists who have no anatomical knowledge can inject the intravenous drug intravenously.

The insertion roller 125 is provided in the form of a roller coupled to the lower leg 121 in the horizontal direction, and as shown in FIG. 125) is inserted into the leg insertion groove 230 of the injection fixing forceps 200.

When the insertion roller 125 is inserted into the leg insertion groove 230, the insertion roller 125 is rotated in the leg insertion groove 230 as shown in FIG. will turn to

The insertion roller 125 is provided in the form of a roller having a circular cross section to facilitate rotation in the leg insertion groove 230 .

The injection fixing tongs 200 are detachably coupled to the penis A, and support the position of the injection unit 100 to be fixed. As shown in FIG. 2, the injection fixing tongs 200 includes a pair of tong plates 210 and 210a, a rotation shaft 220 that rotatably supports the pair of tong plates 210 and 210a, and a pair of tong plates 210 and 210a. A pair of leg insertion grooves 230 formed on the plate surface of the clamp plates 210 and 210a, and a needle insertion long hole 240 formed on the plate surface of the clamp plates 210 and 210a.

A pair of tong plates 210 and 210a are provided with the rotational axis 220 as the center, as shown in FIG. 2, folded or opened. As shown in FIG. 1, the pair of tong plates 210 and 210a are curved plates having a curvature corresponding to the sexual organ A so as to be tightly coupled to the sexual organ A by wrapping the surface thereof when coupled to the sexual organ A. is provided with

A pair of tong plates 210 and 210a are inserted into and fixed to the penis A as shown in FIG.

Grip handles 211 and 211a are provided at upper ends of the pair of clamp plates 210 and 210a, and shaft coupling rings 213 and 213a coupled to the pivot shaft 220 are provided below the grip handles 211 and 211a. Although not shown in the drawings, torsion springs (not shown) are provided on the pivot shaft 220 and the shaft coupling rings 213 and 213a to apply elastic force in the direction in which the pair of clamp plates 210 and 210a are curled.

A pair of leg insertion grooves 230 are provided on both sides of the upper surface of the pair of clamp plates 210 and 210a. The insertion roller 125 of the leg part 120 is inserted into the leg insertion groove 230 .

The needle insertion long hole 240 is formed through a certain length in a vertical direction along the central direction of the central region from the lower end of the clamp plates 210 and 210a. The needle insertion hole 240 allows the needle 115 to penetrate the skin of the genital organ A and inject the intravenous drug C.

The use process of the intravenous injection syringe device 1 according to the present invention having such a configuration will be described with reference to FIGS. 1 to 7.

As shown in FIG. 2, the intravenous injection injector 1 is stored together with the injection unit 100 and the injection fixing tongs 200 separated. When a heart attack patient occurs, the user injects the intravenous drug (C) into the corpus cavernosum of the patient's genitals using the intravenous injection syringe (1) together with the use of a defibrillator so that the intravenous drug (C) is administered intravenously.

The user first presses the pair of tong handles 211 and 211a of the injection fixing tongs 200 to spread the pair of tongs plates 210 and 210a apart, and inserts the penis A between the open tongs plates 210 and 210a. and insert it

Also, as shown in FIG. 5 , the insertion roller 125 at the lower end of the leg portion 120 of the injection unit 100 is inserted into the leg insertion groove 230 .

As shown in (a) of FIG. 7 , the needle 115 is positioned without touching the tong handles 211 and 211a due to the height of the lower leg 121 . In this state, in the injection body 110, as shown in (a) of FIG. 8, the protrusion 111a of the cylinder 111 is the boundary area between the insertion slit 114a of the piston 113 and the position limiting jaw 114b. It is inserted into the lowering of the piston 113 is positioned in a restricted state.

As shown in (b) of FIG. 7 , the user rotates the injection body 110 to the side of the sexual organ A in a state where the insertion roller 125 is inserted into the leg insertion groove 230 . As a result, the needle 115 of the injection body 110 is inserted into the corpus cavernosum B through the needle insertion long hole 240 and penetrates the surface of the sexual organ.

In this state, the user rotates the piston 113 in the horizontal direction so that the protrusion 111a moves in the horizontal direction along the position limiting jaw 114b and is positioned below the injection guide slit 114c. Then, the pressure plate 113a is pressed so that the piston 113 descends and the intravenous agent C is injected into the vein of the corpus cavernosum B.

Here, since the needle insertion long hole 240 is formed to have a certain length, the user just needs to place the injection body 110 within the range of the needle insertion long hole 240 without adjusting the exact position.

At this time, as shown in (b) of FIG. 8, the protrusion 111a moves along the injection guide slit 114c and guides the piston 113 to descend.

Here, the height h2 of the injection guide slit 114c may be adjusted according to the intravenous injection volume of the cylinder 111. Accordingly, since the user only needs to lower the piston 113 by the height of the injection guide slit 114c and inject the intravenous drug, there is an advantage in that the intravenous drug can be injected without prior knowledge of the injection amount.

In addition, the height h1 of the insertion slit 114a is preferably set to a minimum length through which the piston 113 can be inserted into the cylinder 111.

When the intravenous injection is completed, the user lifts the injection unit 100 upward to separate the needle 115 from the penis A and separate the injection clamp 200 from the penis A.

On the other hand, Figure 9 is a perspective view showing the configuration of the intravenous injector (1a) according to another embodiment of the present invention.

In the above-described intravenous injection injector 1, the injection fixing tongs 200 and the injection section 100 are separated, and the injection section 100 is coupled to the injection fixing tongs 200 and used.

On the other hand, in the intravenous injection injector 1a according to another embodiment, an injection receiving block 250 is provided on one clamp plate 210 of the injection fixing tongs 200a, and the injection unit is inside the injection receiving block 250. (100a) is accepted.

At this time, the pressure knob 130 connected to the piston 113 of the injection unit 100a protrudes to the outside of the injection receiving block 250, and the user fixes the injection fixing tongs 200a to the penis and then presses the knob (130) is pressed all the way downward so that the intravenous injection is injected.

Since the intravenous injector 1a according to this other embodiment can be injected by directly pressing the pressure knob 130 without fixing the injection unit 100a to the injection fixing tongs 200a, the use process is preferable. There is an advantage that is simpler than the example intravenous injection syringe (1).

As described above, the intravenous injection injector of the present invention allows an emergency patient to inject an intravenous injection into the male genital area where venous blood is collected without having to find a vein that is difficult for non-professionals to find. Accordingly, it is possible to quickly and conveniently inject an intravenous drug without delaying the emergency patient.

At this time, when a non-professional injects, the injection fixing tongs are coupled to the genitals so that the injection unit can be prevented from shaking and the injection needle can be inserted vertically into the genitals, and the injection unit is placed on the injection fixing tongs to inject intravenous injections. do.

Accordingly, the user can inject by pressing only the piston without needing to separately fix the injection unit.

In this process, the injection unit forms a piston movement restriction slot so that the piston can descend according to the injection volume of the intravenous injection, so that even non-professionals can inject the intravenous injection with an accurate dose.

The embodiment of the intravenous injection injector of the present invention described above is only exemplary, and those skilled in the art to which the present invention belongs are aware that various modifications and other equivalent embodiments are possible therefrom. You will know. Therefore, it will be well understood that the present invention is not limited to the forms mentioned in the detailed description above. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims. It is also to be understood that the present invention includes all modifications, equivalents and alternatives within the spirit and scope of the present invention as defined by the appended claims.

1: intravenous injection syringe 100: injection part
110: injection body 111: cylinder
111a: projection 111b: cylinder flange
111c: needle coupling tube 113: piston
113a: pressure plate 113b: rubber packing
114: piston movement limiting slit 114a: insertion slit
114b: position limit jaw 114c: injection guide slit
115: needle 115a: injection coupling tube
120: leg part 121: lower leg
122: lower joint 123: upper leg
124: upper joint 125: insertion roller
130: pressure knob 200: injection fixing tongs
210,210a: tongs plate 211,211a: tongs handle
213,213a: axis coupling ring 220: rotation axis
230: leg insertion groove 240: needle insertion hole
250: injection receiving block
A: genitals
B: corpus cavernosum
C: Intravenous drug

Claims (7)

In the intravenous injection syringe for administering an intravenous drug to the genitals,
an injection unit 100 having an injection body 110 having a fixed amount of intravenous injection and a needle 115 coupled therein;
An injection fixing clamp 200 detachably coupled to the genital organ, coupled to the injection part 100, and having a needle insertion long hole 240 through which the needle 115 is inserted into the skin of the genital organ,
The injection unit 100 includes a pair of leg portions 120 extending downward on both sides of the injection body 110,
The injection fixing forceps 200 is an intravenous injection syringe device, characterized in that it comprises a leg insertion groove 230 to which the lower portion of the pair of leg portions 120 are coupled to the plate surface.
delete delete According to claim 1,
The injection fixing tongs 200 are provided to be folded or widened to each other on both sides around the rotation shaft 220, and include a pair of tongs plates 210 and 210a to which tongs handles 211 and 211a are coupled at the top. Intravenous injection syringe, characterized in that the.
According to claim 1,
A pair of the leg insertion grooves 230 are formed at the top of the pair of clamp plates 210 and 210a along the longitudinal direction of the penis,
The needle insertion long hole 240 is an intravenous injection syringe device, characterized in that formed a certain length along the circumferential direction from the lower end of the clamp plate (210, 210a).
According to claim 5,
The leg part 120,
a pair of insertion rollers 125 inserted into the pair of leg insertion grooves 230;
a pair of lower legs 121 fixedly coupled to the pair of insertion rollers 125;
The lower part is fixedly coupled to the lower leg 121 and the upper part includes a pair of upper legs 123 fixedly coupled to the outer circumferential surface of the injection body 110,
When the lower leg 121 and the upper leg 123 are rotated toward the needle insertion hole 240 in a state in which the insertion roller 125 is inserted into the leg insertion groove 230, the needle 115 An intravenous injection syringe device characterized in that it is bent and coupled at an angle that can be inserted into the corpus cavernosum.
According to any one of claims 1, 4, 5 or 6,
The injection body 110 includes a cylinder 111 in which intravenous injections are accommodated, a piston 113 coupled to an upper portion of the cylinder 111, and a lower portion of the cylinder 111 to administer intravenous injections to the patient's body. Including a needle 115 for injection into,
A protrusion 111a protruding inward is provided at the upper end of the inner wall surface of the cylinder 111,
On the outer wall surface of the piston 113, a piston movement limiting slit 114 into which the protrusion 111a is inserted is formed with a certain length vertically,
The piston movement limiting slit 114,
an insertion slit (114a) formed with a certain length in the vertical direction from the bottom;
a position limiting jaw 114b which is formed to a certain length in a horizontal direction at an upper end of the insertion slit 114a and restricts insertion of the piston 113;
Intravenous injection syringe device characterized in that it comprises an injection guide slit (114c) formed of a certain length from the other end of the position limiting jaw (114b) to the top and guiding the piston (113) to descend into the cylinder (111). .

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