KR20240038986A - Quantitative injection device for chemical liquid - Google Patents

Abstract

The present invention relates to a fixed-quantity injection device that can be equipped with a syringe and can inject a fixed amount of a drug solution contained in the syringe by a user's pressing action.
The device for quantitative injection of drug solution according to the present invention allows the user to operate with one hand and inject a fixed amount of drug into various areas, thereby maximizing operability and convenience.
Additionally, it has the effect of maximizing drug delivery efficiency even when operated by non-medical staff at home rather than in a hospital.

Description

Quantitative injection device for chemical liquid

The present invention relates to a device for quantitative injection of a chemical solution, and more specifically, to a device for quantitative injection of a chemical solution that can provide various solutions, such as drugs and cosmetics, to target tissues over a wide area through user manipulation.

A method of applying a drug to the skin surface to specifically deliver a drug to a thin tissue such as skin is widely used. However, in the case of applying the drug to the skin surface, there is a problem in that it is difficult to expect an appropriate treatment effect due to the low absorption rate. To solve this problem, a method of penetrating into skin tissue and delivering drugs using a short needle has recently been developed and used. In relation to this prior art, Republic of Korea Patent No. 1939061 is disclosed.

However, this prior art had a problem in that it could not satisfy extreme convenience requirements, such as self-injection, for example, when injecting into one's own face.

The purpose of the present invention is to provide a fixed-quantity injection device for delivering a fixed amount of drug to the skin with a simple operation by maximizing convenience to solve the above-mentioned problems.

As a means of solving the above problem, an upper housing in which a first cavity penetrating in the vertical direction is formed, a lower part configured to be connected to the lower side of the upper housing, and in which a second cavity penetrating in the vertical direction is formed. A housing, a cap disposed on the upper side of the first cavity, at least a portion of which is configured to linearly reciprocate on the first cavity, and a cap that moves downward a preset distance with each upward and downward reciprocating movement of the cap to push the piston of the syringe. A fixed-quantity injection device for chemical liquid including a fixed-quantity movement module configured to allow the drug to be administered may be provided.

Meanwhile, the fixed-quantity movement module is configured to move in a downward direction by receiving force from the bottom of the cap, and can be inserted into the hollow of the first pushing block, the upper housing, and the first pushing block in which a hollow is formed in the vertical direction. It is formed to extend to a predetermined length and may include a pushing bar configured to be supported on one side and moved a predetermined distance in the downward direction as the first pushing block moves downward.

Meanwhile, at least a portion of the lower part of the pushing bar may be configured to be inserted into the inside of the syringe.

Additionally, the lower end of the pushing bar may be inserted into the syringe to press the piston of the syringe.

Meanwhile, the pushing bar includes a linear ratchet gear formed longitudinally on the side, and the first pushing block includes a first pawl engaging the ratchet gear, and the linear ratchet gear and the first pole may be configured to move the pushing bar in the downward direction and limit movement in the upward direction.

Meanwhile, the first cavity further includes a second pushing block provided below the first pushing block at a predetermined distance apart, and the second pushing block has a hollow formed so that the pushing bar can be inserted in the vertical direction and a pushing bar. It may include a second pawl engaged with a linear ratchet gear so that it can be moved in a downward direction.

Meanwhile, it may further include a first spring provided between the cap and the first pushing block and a second spring provided between the first pushing block and the second pushing block.

Meanwhile, a hollow in the vertical direction is formed so that a pushing bar can be inserted, and may further include a guide ring configured to have one side supporting the lower side of the second pushing block and the other side being fixed in the first cavity.

Meanwhile, the first pushing block may be configured to move to a position in close contact with the second pushing block when pressed in a downward direction by the cap, and may be configured to return to the original position by the second spring when not pressed.

Meanwhile, when a downward force is transmitted to the first pushing block by the cap, the first pushing block moves downward together with the pushing bar while limiting the relative movement of the linear ratchet gear by the first pawl, and the second pushing block The second pawl may be configured to allow relative movement of the linear ratchet gear while the position is fixed.

In addition, when the force acting on the first pushing block in the downward direction is removed, the first pushing block is moved upward by the second spring, and the relative movement of the linear ratchet gear is limited by the second pawl of the second pushing block. And, the first pawl of the first pushing block may allow relative movement of the linear ratchet gear.

Meanwhile, the pushing bar is provided with a plurality of linear ratchet gears, and the first pawl and the second pawl may be composed of a plurality corresponding to the number of linear ratchet gears.

Meanwhile, it may include a tip configured to be connected to the needle adapter of the syringe while the syringe is inserted into the second cavity.

In addition, the tip includes an internal passage configured to be in fluid communication with the needle adapter and a plurality of needles, each of the plurality of needles is configured to be in fluid communication with the internal passage, and are arranged to be spaced apart from each other, and a portion of the bottom may protrude downward from the lower surface of the tip.

The device for quantitative injection of drug solution according to the present invention allows the user to pump and inject drugs and various solutions in a fixed amount into various areas by clicking with one hand, which has the effect of maximizing operability and convenience.

Additionally, it has the effect of maximizing drug delivery efficiency even when operated by non-medical staff at home rather than in a hospital.

1 is a front view of a device for quantitative injection of a chemical solution according to an embodiment of the present invention.
Figure 2 is an exploded perspective view of an apparatus for quantitative injection of a chemical solution according to an embodiment of the present invention.
Figure 3 is a cross-sectional view of a chemical solution quantitative injection device according to an embodiment of the present invention.
Figure 4 is an enlarged cross-sectional view of I in Figure 3.
Figures 5a, 5b, and 5c are diagrams showing the operating state of the pushing block by user manipulation.
Figure 6 is a diagram showing the position of the piston moved by repetitive operation of the fixed-quantity movement module.
Figure 7 is a concept showing the concept of resetting the position of the pushing bar.
Figure 8 is a conceptual diagram showing the concept of inserting a syringe into the lower housing.
Figure 9 is a conceptual diagram showing the fastening operation of the tip.
Figure 10 is a diagram showing the state of use of the device for quantitative injection of a chemical solution according to an embodiment of the present invention.
Figure 11 is another state of use of the chemical solution quantitative injection device according to an embodiment of the present invention.

Hereinafter, a device for quantitative injection of a chemical solution according to an embodiment of the present invention will be described in detail with reference to the attached drawings. And in the description of the following embodiments, the names of each component may be referred to by different names in the art. However, if there is functional similarity and identity between them, they can be viewed as equivalent configurations even if modified embodiments are adopted. Additionally, symbols added to each component are described for convenience of explanation. However, the content shown in the drawings in which these symbols are written does not limit each component to the scope within the drawings. Likewise, even if an embodiment in which the configuration in the drawing is partially modified is adopted, if there is functional similarity and identity, it can be viewed as an equivalent configuration. Additionally, if it is recognized as a component that should naturally be included in light of the general level of technicians in the relevant technical field, the description thereof will be omitted.

Meanwhile, hereinafter, the device for quantitative injection of chemical liquid will be defined and described as the vertical direction based on the state shown in FIG. 1. That is, the explanation will be made on the premise that the cap, to be described later, is placed on the upper side, and the place where the tip, to be described later, is located is the lower side.

Hereinafter, the configuration of the chemical solution quantitative injection device 1, which is an embodiment of the present invention, will be described in detail with reference to FIGS. 1 to 4.

Figure 1 is a front view of a quantitative injection device 1 for a chemical solution according to an embodiment of the present invention, Figure 2 is an exploded perspective view of a device 1 for quantitative injection of a chemical solution 1 according to an embodiment of the present invention, and Figure 3 is a This is a cross-sectional view of the chemical liquid constant injection device 1, which is an embodiment, and FIG. 4 is an enlarged cross-sectional view of I in FIG. 3.

Referring to Figures 1 to 4, the fixed-quantity injection device 1, which is an embodiment according to the present invention, is configured to pressurize the syringe 1000 loaded inside while moving a certain amount by a single reciprocating operation by the user. It can be. That is, by one operation, the piston 1200 of the syringe 1000 moves a fixed amount, and as the piston 1200 moves inside the syringe 1000, various solutions such as a fixed amount of drugs or cosmetics are moved to the tip 500. It may be configured to flow out through the needle 510. That is, it is composed of a pen type and can be configured as a click-type pump system that injects a chemical solution by clicking.

It may be configured to include an upper housing 100, a lower housing 200, a cap 300, a syringe 1000, a quantitative movement module 400, and a tip 500.

The upper housing 100 and the lower housing 200 have a hollow space formed in an upward and downward direction on the inside, and can be configured so that a syringe 1000 and a quantitative movement module 400 can be provided in the inner hollow.

The upper housing 100 and the lower housing 200 are configured to be used by being coupled to each other in the vertical direction, and can be disassembled to insert and remove the syringe 1000 and reset the position of the pushing bar 410, which will be described later. You can. The upper housing 100 and the lower housing 200 may be configured in a cylindrical shape to improve convenience when a user holds and operates them.

The upper housing 100 is formed to extend a predetermined length in the vertical direction, and has a first cavity 101 formed in the vertical direction on the inside, and is configured to be provided with a fixed-quantity movement module 400 and a cap 300. It can be. A guide ring 440 may be provided on the lower side of the upper housing 100 to prevent the second pushing block 430 of the fixed-quantity movement module 400 from being separated downward. The guide ring 440 prevents the second pushing block 430, which will be described later, from moving downward, but may be hollow in the central portion to allow the pushing bar 410 to pass through.

A cap support portion 110 may be provided on the upper side of the upper housing 100 to prevent the cap 300 from coming off. The cap support portion 110 may be formed to protrude a predetermined length within the first cavity 101 toward the central axis. The cap support portion 110 may be configured to have an inner diameter through which one side of the cap 300 passes, but through which the cap protrusion 310, which will be described later, does not pass. Accordingly, the cap 300 is restricted from upward movement over a predetermined distance by the cap support portion 110.

The lower housing 200 extends a predetermined length in the vertical direction and may be configured to be fastened to the lower side of the upper housing 100. The lower housing 200 may have a second cavity 201 formed in the vertical direction. The syringe 1000 may be inserted into the second cavity 201 from the top to the bottom of the lower housing 200.

A syringe support portion 210 may be provided on the lower side of the lower housing 200 and protrudes in the radial direction toward the second cavity 201. The syringe support portion 210 supports the lower side of the syringe 1000 when the syringe 1000 is inserted into the second cavity 201. In addition, the syringe support part 210 is configured to have a hole formed in the center portion so that the needle adapter 1100 of the syringe 1000 can be mounted while being inserted into the hole.

The cap 300 is provided on the upper side of the upper housing 100 and may be provided with at least part of the cap 300 inserted into the first cavity 101 . The cap 300 moves in the vertical direction due to the user's pressing action, but may be configured to be restricted from moving upward. The cap 300 is configured to be inserted upward into the second cavity 201, and a cap protrusion 310 protrudes in the radial direction so as to be associated with the cap support 110 on the lower side of the cap 300. may be provided. The cap 300 is configured to have a hollow center portion so that a pushing bar 410, which will be described later, can be inserted in the vertical direction. This will be explained in detail later with reference to FIG. 8.

The fixed amount movement module 400 is configured so that when the user presses the cap 300, the end moves downward at a certain distance. At least a portion of the fixed dose movement module 400 is disposed in the first cavity 101, and at least a portion is configured to be in close contact with the piston 1200 inside the syringe 1000 mounted in the second cavity 201. .

The fixed amount movement module 400 may include a pushing bar 410, a first pushing block 420, a second pushing block 430, a first spring 450, and a second spring 460. The pushing bar 410 is formed to extend in the longitudinal direction and can be configured to move downward by the support operation of the first pushing block 420 and the second pushing block 430.

The pushing bar 410 may be composed of a cap 300, a second cavity 201, and an outer diameter that can be inserted into the syringe 1000. The pushing bar 410 may be provided with at least one linear ratchet gear 411 on its side. As an example, the ratchet gears 411 may be provided in opposite directions on the side of the pushing bar 410. The inclination of the gear teeth of the ratchet gear 411 may be determined so that it can only be moved in the downward direction by the first pushing block 420 and the second pushing block 430. As an example, each gear tooth of the ratchet gear 411 may have an upper surface configured in a horizontal direction, and at least a portion of the lower surface may be configured with an inclined surface that faces downward as it moves away from the center of the pushing bar 410.

The first pushing block 420 and the second pushing block 430 are arranged in the vertical direction, and can be configured to move the pushing bar 410 downward by a certain distance as the distance between them is adjusted. The first pushing block 420 may be configured to include a first pawl 421 engaged with the ratchet gear 411. The first pawl 421 is formed to extend downward from the upper side of the first pushing block 420, and may be provided with gear teeth at the lower end facing the central axis in the vertical direction. The lower surface of the gear teeth of the first pole 421 is formed in a horizontal direction, and at least a portion of the upper surface of the teeth may be provided with an inclined surface inclined downward toward the central axis.

Like the first pushing block 420, the second pushing block 430 may be provided with a second pole 431. The second pawl 431 is formed to extend a predetermined length from the top of the second pushing block 420 to the bottom, and may be provided with gear teeth. The direction of the gear teeth may also be provided in the same manner as the first pole 421.

The first pawl 421 and the second pawl 431 are made of an elastic material so that they can be bent when the ratchet gear 411 moves out in the downward direction, and the teeth of the ratchet gear 411 are formed by the first pawl ( 421) and the gear teeth of the second pawl 431 and then returned to their original positions to support the upper surface of the passed ratchet gear 411 teeth.

The first spring 450 is provided between the cap 300 and the first pushing block 420 and can provide upward force to return the cap 300 to its original position after moving downward.

The second spring 460 is provided between the first pushing block 420 and the second pushing block 430, and applies an upward force to return the first pushing block 420 to its original position after moving downward. can be provided.

Meanwhile, the above-described first pushing block 420, second pushing block 430, first spring 450, and second spring 460 will have a space inside where the pushing bar 410 can be inserted. You can.

The tip 500 is provided on the lower side of the lower housing 200 and may be provided to be detachable from the syringe support part 210. The upper side of the tip 500 is connected to the syringe support 210 and may be configured to communicate fluidly with the needle adapter 1100 of the syringe 1000. The end of the tip 500 may be provided with a plurality of needles 510 that protrude at a predetermined length from the end surface. The interior of the tip 500 may be provided with an internal flow path configured to allow fluid communication between the needle adapter 1100 of the syringe 1000 and each of the plurality of needles 510. Accordingly, the chemical liquid leaked to the outside by pressurizing the syringe 1000 may be discharged through a plurality of needles 510. Meanwhile, the outer surface of the top of the tip may be fixed in close contact with the lower side of the syringe support part 210, and the inner surface may be configured so that the needle adapter 1100 can be inserted. At this time, a needle equipped with a needle adapter 1100 having various outer diameters depending on the inner diameter of the top of the tip can be used, and a needle equipped with a needle adapter 1100 having a somewhat smaller outer diameter can also be used without changing the structure. Meanwhile, the connection structure between the top of the tip and the syringe support portion 210 may be modified into various known structures.

The protrusion length of the plurality of needles 510 may be determined by the length at which the needles 510 can be inserted into the skin when the lower surface of the tip 500 is in close contact with the surface of the skin. Preferably, the protrusion length of the plurality of needles 510 may be less than 2 mm.

Meanwhile, the tip may be equipped with various types of needles. The tip can perform chemical injection and skin stimulation functions depending on the type of needle. Specifically, depending on the type, the needle of the tip can reach the skin surface, superficial layer, epidermis layer, and targeting skin layer, thereby stimulating tissue and/or administering drugs. Various solutions (purposed liquid solutions) can be injected.

Referring again to FIGS. 3 and 4, the cap 300, the first pushing block 420, the first pushing block 420, and the second pushing block 430 may each be provided at a predetermined distance apart in the vertical direction. there is.

In particular, the vertical separation distance between the first pushing block 420 and the second pushing block 430 may be determined by the distance that the user wants to move by one pressing operation. As an example, the ratchet gears 411 may be spaced apart by the length of two. Meanwhile, the number of first pawls 421 and second pawls 431 may be provided in a number corresponding to the number of ratchet gears 411 provided on the pushing bar 410.

Hereinafter, the operation of the quantitative movement module 400 will be described in detail with reference to FIGS. 5A, 5B, and 5C.

Figures 5a, 5b, and 5c are diagrams showing the operating state of the pushing block by user manipulation.

First, referring to FIG. 5A, as described with reference to FIG. 4, the cap 300 is provided on the upper side of the first pushing block 420 and is supported by the first spring 450 to form the first cavity 101. It can be placed at the uppermost position in the middle. The lower side of the second pushing block 430 is supported by the guide ring 440, so movement in the downward direction may be restricted. The first pushing block 420 is provided between the cap 300 and the second pushing block 430, the upper side is supported by the first spring 450, and the lower side is supported by the second spring 460. You can.

In the standby state, the first pushing block 420 and the second pushing block 430 may be arranged to be spaced apart by the second spring 460. At this time, as described above, the separation distance may be determined by the length of the pushing bar that the user wishes to lower with one pushing operation.

Referring to FIG. 5B , when the user presses the cap 300 in the downward direction, the cap 300 descends and comes into close contact with the first pushing block 420 to transmit force, and thus the first pushing block 420 It also moves downward and comes into close contact with the upper side of the second pushing block 430. At this time, the pushing bar 410 moves downward along with the first pushing block 420 while the ratchet gear 411 is supported by the first pawl 421 of the first pushing block 420.

Referring to FIG. 5C, when the user releases the pressing force, the first pushing block 420 moves upward by the second spring 460, and at this time, the pushing bar 410 moves the ratchet gear 411 to the second As the pushing block 430 is supported by the second pole 431, movement in the upward direction is restricted, and only the first pushing block 420 moves upward. The first pawl 421 of the first pushing block 420 moves upward relative to the ratchet gear 411.

Meanwhile, the cap 300 is moved away from the second pushing block 430 by the second spring 460, and its upward movement is restricted by the cap support 110 so that it moves to the initial position as shown in FIG. 5A. I do it.

Ultimately, due to one cycle of FIGS. 5A to 5C, the pushing bar 410 is spaced downward by a predetermined distance, and the cap 300, the first pushing block 420, and the second pushing block 430 return to their initial positions. do.

FIG. 6 is a diagram showing the position of the piston 1200 that is moved by repetitive operation of the fixed-quantity movement module 400.

Through the process of FIGS. 5A to 5C described above, the pushing bar 410 is lowered by a certain distance due to one pressing operation. Meanwhile, since the lower end of the pushing bar 410 supports the piston 1200 of the syringe 1000, the user can inject a fixed amount of chemical solution by pressing once. This operation is performed repeatedly to supply a certain amount of chemical solution for each pressing operation, and the user can repeatedly perform the pressing operation until all of the chemical solution contained in the syringe 1000 is used. Meanwhile, the moving distance of the pushing bar 410 by one click may be determined by the size of the teeth of the ratchet gear 411. That is, if the length of the teeth of the ratchet gear 411 in the vertical direction is longer, the unit distance moved once can be increased, so the injected chemical solution can also be increased. Additionally, the moving distance of the pushing bar moved by clicking the cap once may be determined by the initially set distance between the first pushing block 420 and the second pushing block 430. That is, the amount of the injected chemical solution can be adjusted in accordance with the distance that the first pushing block 420 descends due to the clicking operation.

Hereinafter, with reference to FIGS. 7 to 9, the preparation process performed by the user in order to use the device for quantitatively supplying chemical liquid according to the present invention will be described.

FIG. 7 illustrates the concept of resetting the position of the pushing bar 410.

As described above, the pushing bar 410 is allowed to move only in the downward direction by the operation of the first pushing block 420 and the second pushing block 430. Therefore, when the ratchet gear 411 leaves the first pawl 421 of the first pushing block due to the user's repeated pressing action, no further movement is made.

Therefore, the user disassembles the upper housing 100 and the lower housing, and pulls the pushing bar 410 downward from the upper housing 100 to remove it. Afterwards, the user maintains the direction of the pushing bar 410, aligns it with the hollow formed in the cap 300, and pushes it downward. At this time, the reset can be completed by pushing the ratchet gear 411 of the pushing bar 410 downward to a position where it acts with the first pawl 421 and the second pawl 431. Therefore, the user can reset the position of the pushing bar, replace the syringe, and reuse the drug metering injection device. Meanwhile, for the user's convenience, the vertical length of the cap 300 is determined by the ratchet gear 411 of the pushing bar 410 when the top of the pushing bar 410 and the top of the cap 300 are aligned. It can be determined to be associated with 2 poles (431).

Figure 8 is a conceptual diagram showing the concept of inserting the syringe 1000 into the lower housing 200. Referring to FIG. 8, the user installs the syringe 1000 containing the chemical solution into the second cavity 201. At this time, the syringe 1000 is prevented from being separated in the downward direction by the syringe support part 210 provided on the lower side of the lower housing 200.

Figure 9 is a conceptual diagram showing the fastening operation of the tip 500.

Referring to FIG. 9, after the user mounts the syringe 1000 in the second cavity 201, the upper housing 100 can be fastened to the lower housing 200 to complete preparation for use. When fastening the upper housing 100 and the lower housing 200, the user must align and fasten with the lower end of the pushing bar 410 entering the inside of the syringe 1000. At this time, it is preferable that the pushing bar 410 is fastened with its position on the upper housing 100 reset.

Hereinafter, the use of the chemical solution quantitative injection device 1 according to the present invention will be described with reference to FIGS. 10 and 11.

Figure 10 is a state diagram of the use of the chemical solution quantitative injection device 1, which is an embodiment according to the present invention.

Referring to FIG. 10, the device for quantitative injection of a chemical solution 1 according to the present invention can perform a one-time injection operation due to a user's pressing action. Afterwards, the user can move the chemical liquid quantitative injection device 1 to another location and then perform one injection operation by pressing the button. After that, the user can move the chemical liquid quantitative injection device 1 to another location and perform one injection operation by pressing the button. Ultimately, the user can supply a fixed amount of drug to a large treatment area using one syringe 1000. However, with reference to this drawing, an example of performing a single pressing operation at each injection position is shown, but this is only an example. Depending on the required injection amount of the chemical solution, the user may perform the pressing operation multiple times at one location. The injection amount can be adjusted. Even in this case, the total amount of chemical solution delivered can be determined by multiplying the amount of chemical solution determined in one pressing operation by the number of pressing operations.

Figure 11 is another usage state diagram of the chemical solution quantitative injection device 1, which is an embodiment according to the present invention.

As shown, the drug solution quantitative injection device 1, which is an embodiment according to the present invention, is composed of a pen type and can be configured to be held and operated with one hand. The user can inject the chemical solution by pressing the cap 300 with his or her thumb while holding the chemical solution quantitative injection device 1. On the other hand, when it is necessary to evenly inject a chemical solution into a large area such as the face, the user moves the position while holding the chemical liquid quantitative injection device (1) with one hand, presses the cap (300) to inject the chemical solution, and moves to another location to perform the same process. It can be repeated.

As described above, the device for quantitative injection of drug solution according to the present invention allows the user to inject a fixed amount of drug into various areas by operating it with one hand, which has the effect of maximizing operability and convenience.

Additionally, it has the effect of maximizing drug delivery efficiency even when operated by non-medical staff at home rather than in a hospital.

Claims (14)

an upper housing in which a first cavity is formed that penetrates in the vertical direction;
a lower housing configured to be connectable to a lower side of the upper housing and having a second cavity penetrating in the vertical direction;
a cap disposed on an upper side of the first cavity, at least a portion of which is configured to reciprocate linearly on the first cavity;
A fixed-quantity injection device comprising a fixed-quantity movement module configured to push the piston of the syringe by moving downward a preset distance with each upward and downward reciprocating motion of the cap. According to claim 1,
The quantitative transfer module is,
a first pushing block configured to receive force from the lower end of the cap and move downward, and having a hollow shape in the upper and lower direction;
It is formed to extend a predetermined length so as to be inserted into the hollow of the upper housing and the first pushing block, and is configured to be supported on one side and moved a predetermined distance in the downward direction as the first pushing block moves downward. A device for quantitative injection of a chemical solution including a pushing bar. According to clause 2,
A drug solution quantitative injection device wherein at least a portion of the lower portion of the pushing bar is configured to be inserted into the syringe. According to clause 3,
The lower end of the pushing bar is inserted into the syringe to pressurize the piston of the syringe. According to clause 3,
The pushing bar includes a linear ratchet gear formed longitudinally on the side,
The first pushing block includes a first pawl engaging the ratchet gear,
The linear ratchet gear and the first pawl are configured to move the pushing bar in a downward direction and limit its upward movement. According to clause 5,
It further includes a second pushing block provided in the first cavity and spaced a predetermined distance below the first pushing block,
The second pushing block includes a hollow formed so that the pushing bar can be inserted in the vertical direction and a second pawl engaged with the linear ratchet gear so that the pushing bar can be moved in the downward direction. injection device. According to clause 6,
a first spring provided between the cap and the first pushing block; and
A chemical liquid quantitative injection device further comprising a second spring provided between the first pushing block and the second pushing block. According to clause 7,
A hollow portion is formed in the vertical direction so that the pushing bar can be inserted, and one side supports the lower side of the second pushing block, and the other side further includes a guide ring configured to be fixed in the first cavity. injection device. According to clause 8,
The first pushing block is,
It is configured to move to a position in close contact with the second pushing block when pressed in a downward direction by the cap,
A device for quantitative injection of a chemical solution configured to be returned to its original position by the second spring when not pressurized. According to clause 9,
When a downward force is transmitted to the first pushing block by the cap,
The first pushing block moves downward together with the pushing bar while limiting the relative movement of the linear ratchet gear by the first pawl,
The second pawl of the second pushing block is configured to allow relative movement of the linear ratchet gear while the position is fixed. According to claim 10,
When the force acting downward on the first pushing block is removed, the first pushing block is moved upward by the second spring,
Limiting the relative movement of the linear ratchet gear by the second pawl of the second pushing block,
The first pawl of the first pushing block allows relative movement of the linear ratchet gear. According to clause 5,
The pushing bar is provided with a plurality of linear ratchet gears,
The first pawl and the second pawl are configured in plural numbers corresponding to the number of the linear ratchet gears. According to claim 12,
A drug solution quantitative injection device including a tip configured to be connected to a needle adapter of the syringe while the syringe is inserted into the second cavity. According to claim 13,
The tip includes an internal passage configured to be in fluid communication with the needle adapter and a plurality of needles,
Each of the plurality of needles,
It is configured to communicate fluidly with the internal flow path,
They are placed spaced apart from each other,
A device for quantitative injection of a chemical solution in which a portion of the lower part protrudes downward from the lower surface of the tip.

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