WO2024049121A1

WO2024049121A1 - Medicament delivery device

Info

Publication number: WO2024049121A1
Application number: PCT/KR2023/012662
Authority: WO
Inventors: 쥐 웰스포드이안; 네프제임스; 테리조쉬
Original assignee: 이오플로우㈜
Priority date: 2022-08-28
Filing date: 2023-08-25
Publication date: 2024-03-07

Abstract

An embodiment of the present invention provides a medicament delivery device comprising: a body part in which a first space capable of holding a first material and a second space capable of holding a second material and separated from the first space are formed; a plunger part which is inserted into one side of the body part and is movable in a predetermined section; and a filter part which is disposed on a path allowing the inner space of the body part to communicate with the space outside the body part and selectively discharges gas contained in at least one of the first material and the second material, wherein, as the plunger is moved, the first space and the second space selectively communicate with each other.

Description

drug injection device

The present invention relates to a drug injection device.

A drug injection device is used to directly inject drugs into a patient's body or to fill a device that directly injects drugs into a patient's body. These drug injection devices are sometimes used by professional medical staff such as doctors and nurses, but in most cases, they are used by the general public such as patients themselves or their guardians.

Generally, in order to facilitate the storage of drugs that are easily deteriorated, the drug is first freeze-dried and mixed with other drugs, sap, or distilled water immediately before injection and then injected.

Examples of conventional methods of mixing drugs are as follows. Poke the syringe injection needle into a container such as a bag or vial containing liquid medicine, intravenous fluid, or distilled water, puncture the container, inhale the contents inside the container into the syringe, and then inject. Remove the needle from the container. Then, the needle of the syringe is pierced into another container containing the medicine in liquid or powder form, puncturing the other container, and the liquid medicine, sap or distilled water inside the syringe is injected into the other container. Shake to mix the contents inside. After mixing is completed, the mixed solution in the other container is inhaled and received into the syringe through a needle, and then the needle is withdrawn from the other container.

However, there was a problem in that the drug was not mixed properly during the process of the user directly mixing the drug, resulting in a change in the concentration or acidity of the drug or the possibility of side effects from the injectable drug.

The background technology of the present invention is disclosed in Republic of Korea Patent Publication No. 10-2017-0106053 (registered on March 7, 2019, title of invention: Chemical injection device).

The technical problem to be achieved by the present invention is that the main body forms a first space and a second space partitioned from the first space, and as the plunger part moves, the first space and the second space are selectively communicated, so that they are located in different spaces. A drug injection device capable of selectively mixing substances is provided.

One aspect of the present invention includes a main body in which a first space capable of accommodating a first material and a second space capable of accommodating a second material and separated from the first space are formed; a plunger portion inserted into one side of the main body and movable in a preset section; and a filter unit disposed on a path that communicates the internal space of the main body with the external space, and selectively discharges gas contained in at least one of the first material and the second material, wherein the plunger portion moves. Accordingly, a drug injection device is provided, wherein the first space and the second space are selectively communicated.

In addition, the main body portion has an opening formed on one side and a receiving body formed in the shape of a hollow tube; and a partition portion that is movable while in surface contact with the inner peripheral surface of the receiving body and selectively partitions the first region and the second region.

Additionally, a bypass portion extending along the longitudinal direction of the receiving body and having the shape of a groove may be formed on the inner peripheral surface of the receiving body.

Additionally, the length of the bypass portion may be relatively longer than the length along which the partition portion extends.

In addition, it may further include an injection unit that is connected to the receiving body and the filter unit, respectively, and provides an discharge path for at least one of the first material and the second material accommodated in the receiving body.

In addition, an injection hole part and an exhaust hole part communicating with the internal space of the main body part are formed on one side of the injection part and the other side opposite to the one side, respectively, and one surface of the injection part where the exhaust hole part is formed is in surface contact with the filter part. can do.

In addition, it may further include a receiving portion that is movable while making surface contact with the inner peripheral surface of the main body portion and has a hollow interior.

In addition, the plunger portion includes: a first plunger located inside the main body portion and selectively communicating between the inner space of the accommodating portion and the inner space of the main body portion as it advances toward the accommodating portion; and a second plunger that discharges the first material and the second material accommodated in the inner space of the container and the inner space of the main body to the outside of the main body as it advances toward the side of the accommodating part. .

Additionally, the first plunger includes a sliding body movable on the second plunger; and a partition part connected to the sliding main body and capable of selectively making surface contact with the circumference of the inner peripheral surface of the receiving part as the sliding main body moves.

Additionally, the second plunger may have a rail portion formed in the longitudinal direction of the main body portion to provide a movement path for the first plunger.

In addition, the second plunger may have a filter seating portion on one end adjacent to the receiving portion formed in the shape of a groove into which the filter portion can be seated.

In addition, the main body includes a receiving body having an opening formed on one side and a hollow interior; and a first partition portion that is movable and in surface contact with the inner peripheral surface of the receiving body, and in which a communication passage connecting the first space and the second space is formed.

In addition, the first partition portion includes a partition body that is in surface contact with the inner peripheral surface of the main body portion and is disposed between the first space and the second space; and a film portion in surface contact with one surface of the compartment main body facing the plunger portion.

In addition, the plunger unit includes a first plunger including a needle capable of penetrating the film as it advances toward the first compartment, and the needle may share a longitudinal central axis with the communication passage.

The drug injection device according to an embodiment of the present invention includes a partition portion that selectively communicates different spaces of the main body portion depending on the position of the plunger portion, so that different substances accommodated in the main body portion can be mixed just by manipulating the plunger portion. It has an easy effect.

1 is a perspective view of a drug injection device according to a first embodiment of the present invention.

Figure 2 is an exploded view of a drug injection device according to a first embodiment of the present invention.

Figure 3 is a cross-sectional view taken along line II' of Figure 1.

Figure 4 is a cross-sectional view taken along line II-II' in Figure 1.

Figures 5A to 5C are diagrams for explaining the state of use of the drug injection device according to the first embodiment of the present invention.

Figure 6 is an enlarged view of part A of Figure 3.

Figure 7 is a perspective view of a drug injection device according to a second embodiment of the present invention.

Figure 8 is a cross-sectional view taken along line III-III' in Figure 7.

Figure 9 is a cross-sectional view taken along line IV-IV' in Figure 7.

Figure 10 is a cross-sectional view taken along line V-V' of Figure 7.

Figure 11 is a diagram for explaining the use state of the plunger portion according to the second embodiment of the present invention.

Figures 12A to 12E are diagrams for explaining the use state of the drug injection device according to the second embodiment of the present invention.

Figure 13 is an exploded view to explain the combined state of the receiving body, the first plunger, and the second plunger of the drug injection device according to the second embodiment of the present invention.

Figure 14 is an exploded view of part B of Figure 13 enlarged.

Figure 15 is a perspective view of a drug injection device according to a third embodiment of the present invention.

Figure 16 is a cross-sectional view taken along line VI-VI' in Figure 15.

Figure 17 is an enlarged view of part C of Figure 16.

Figures 18a, 18b, 19a, and 19b are diagrams for explaining the use state of the drug injection device according to the third embodiment of the present invention.

Figure 20 is an exploded view for explaining the combined state of the receiving body, the first plunger, and the second plunger of the drug injection device according to the third embodiment of the present invention.

Since the present invention can be modified in various ways and can have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various forms.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. When describing with reference to the drawings, identical or corresponding components will be assigned the same reference numerals and redundant description thereof will be omitted. .

In the following examples, singular terms include plural terms unless the context clearly dictates otherwise.

In the following embodiments, terms such as include or have mean that the features or components described in the specification exist, and do not exclude in advance the possibility of adding one or more other features or components.

In cases where an embodiment can be implemented differently, a specific process sequence may be performed differently from the described sequence. For example, two processes described in succession may be performed substantially at the same time, or may be performed in an order opposite to that in which they are described.

In the drawings, the sizes of components may be exaggerated or reduced for convenience of explanation. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, so the following embodiments are not necessarily limited to what is shown.

Drug injection devices according to embodiments of the present invention relate to devices in which two or more substances contained in the drug injection device are mixed/combined and injected to the outside as the plunger portion, which will be described later, moves.

Specifically, as the plunger part moves to the preset area, the space where different substances are located is selectively communicated, causing the different substances to mix/combine, and as the plunger part moves beyond the preset area, the mixing/combination occurs. The material is injected to the outside.

In conclusion, drug injection devices according to embodiments of the present invention simultaneously implement a mixing/compound mechanism and an infusing mechanism, and the related description is provided in detail in this specification.

In this specification, the ‘first material (M1)’ and the ‘second material (M2)’ may be formed of different materials. For example, one of the 'first material (M1)' and the 'second material (M2)' may be formed of a liquid such as an aqueous solution, and the other may be a freeze-dried drug. However, it is not limited to this, and the 'first material (M1)' and 'second material (M2)' may be made of various materials that the drug injection device can accommodate.

Additionally, 'medication solution' can be interpreted as a mixture or compound of a drug and a liquid.

Hereinafter, the drug injection device 1 according to the first embodiment of the present invention will be described.

1 is a perspective view of a drug injection device according to a first embodiment of the present invention. Figure 2 is an exploded view of a drug injection device according to a first embodiment of the present invention. Figure 3 is a cross-sectional view taken along line II' of Figure 1. Figure 4 is a cross-sectional view taken along line II-II' in Figure 1. Figures 5A to 5C are diagrams for explaining the state of use of the drug injection device 1 according to the first embodiment of the present invention. Figure 6 is an enlarged view of part A of Figure 3.

Referring to Figures 1 and 2, the drug injection device 1 according to the first embodiment of the present invention includes a main body 1100, an injection part 1200, a filter part, a plunger part 1400, and a housing part 1500. ) may include.

The main body 1100 has a first space (S1) that can accommodate the first material (M1) and a second space (S2) that can accommodate the second material (M2) and is separated from the first space (S1). It may include a receiving body 1110 and a partition 1120.

The receiving body 1110 may be formed in the shape of a hollow tube with an opening (hereinafter referred to as 'front opening 1115h') formed on one side.

Referring to FIGS. 1 and 2, the receiving body 1110 is formed in the shape of a hollow tube, and a front opening 1115h is formed at one end connected to the injection unit 1200, and at the other end opposite to the one end. A rear opening 1110h is formed.

A fastening portion 1115 may be formed to protrude from one end of the receiving body 1110 to be inserted into a fastening groove formed on one side of the injection portion 1200. Specifically, the fastening portion 1115 may protrude outward from one side of the receiving body 1110 facing the injection portion 1200.

Referring to Figures 2 and 3, grooves may be formed along the circumferential direction on the outer peripheral surface of the fastening portion 1115. As a result, the separate sealing member comes into close contact with the fastening groove of the injection unit 1200 and is seated in the groove, so that the chemical solution (DS) contained in the injection body 1210 is discharged to the outside through the injection unit 1200. It is possible to prevent the chemical solution DS from leaking into the space between the fastening part 1115 and the fastening groove.

Referring to FIGS. 2 and 3, the outer diameter of the fastening portion 1115 may be formed to be equal to or relatively larger than the inner diameter of the fastening groove portion. As a result, the fastening part 1115 can be firmly fastened to the fastening groove in an interference fit manner, thereby preventing the chemical solution DS from leaking between the fastening part 1115 and the fastening groove.

Referring to FIG. 6, a sealing groove portion (reference sign not specified) into which a sealing member (reference sign not specified) can be seated may be formed on the inner peripheral surface of the fastening portion 1115. As a result, the sealing member seated in the sealing groove contacts the inner peripheral surface of the fastening part 1115 and the outer peripheral surface of the insertion part, which will be explained later, thereby preventing the chemical solution DS from leaking into the space between the insertion part and the fastening part 1115. can do.

Referring to FIGS. 2 to 4 , a rear opening 1110h may be formed at the other end opposite to one end of the receiving body 1110 facing the injection unit 1200. Specifically, the inner diameter of the rear opening 1110h may be the same as the inner diameter of the injection body 1210 forming the first space S1 and the second space S2.

A plunger portion 1400, specifically a rod portion 1410 to be described later, is inserted into the rear opening 1110h of the receiving body 1110 and can move along the longitudinal direction of the receiving body 1110.

Referring to FIGS. 2 to 4 , the inner diameter of the receiving body 1110 may be the same as or relatively small as the outer diameter of the partition portion 1120 and the outer diameter of the head portion 1420, which will be described later. As a result, the partition portion 1120 and the head portion 1420, which are formed of an elastic material, are able to make solid surface contact with the inner peripheral surface of the receiving body 1110, so that the chemical solution (DS) is connected to the inner peripheral surface of the receiving body 1110 and the partition portion ( Leakage into the space between 1120 or the inner peripheral surface of the receiving body 1110 and the head portion 1420 can be prevented.

Referring to FIGS. 2 and 4 , a bypass portion 1111 extending along the longitudinal direction of the accommodating body 1110 may be formed on the inner peripheral surface of the accommodating body 1110 according to the first embodiment of the present invention.

In one embodiment, the bypass portion 1111 may be formed in the shape of a groove extending along the longitudinal direction of the receiving body 1110. Specifically, the inner diameter of one side of the receiving body 1110 where the bypass portion 1111 is formed may be relatively larger than the inner diameter of one side of the receiving body 1110 where the bypass portion 1111 is not formed.

Additionally, the inner diameter of one side of the receiving body 1110 where the bypass portion 1111 is formed may be relatively larger than the outer diameter of the partition portion 1120.

In one embodiment, the circumferential length of the inner peripheral surface of the receiving body 1110 where the bypass part 1111 is located is relatively longer than the circumferential length of the inner peripheral surface of the receiving main body 1110 where the bypass part 1111 is not located. It can be.

The length of the bypass portion 1111 may be relatively longer than the length of the partition portion 1120 extending along the longitudinal direction of the receiving body 1110. Specifically, the length of the bypass unit 1111 in one direction (X-axis direction based on FIG. 4) may be relatively longer than the length of the partition unit 1120 in the one direction. For this reason, referring to Figure 5b, when the partition 1120 moves along the one direction and is located between one end and the other end of the bypass part 1111, the first space partitioned by the partition 1120 ( S1) and the second space (S2) are communicated through the bypass part 1111, which has the effect of allowing liquid and drug to be mixed.

Referring to FIG. 5B, when the partition 1120 is located between one end and the other end of the bypass part 1111, the first space S1 and the second space S2 are of the partition 1120. It may communicate through a space formed by the outer circumferential surface and the inner circumferential surface of the bypass portion 1111, through which the first material (M1) accommodated in the first space (S1) and the second material (M1) accommodated in the second space (S2) The substance M2 may be mixed through a space formed by the outer peripheral surface of the partition 1120 and the inner peripheral surface of the bypass unit 1111 to generate the chemical solution DS.

In an optional embodiment, a plurality of bypass parts 1111 may be provided, and the plurality of bypass parts 1111 may be a groove portion extending along the longitudinal direction of the receiving body 1110 on the inner peripheral surface of the receiving body 1110. It is formed in a shape and can be arranged at a preset angle based on the longitudinal central axis of the receiving body 1110.

In an optional embodiment, the plurality of bypass parts 1111 are formed on the inner peripheral surface of the receiving body 1110 in the shape of a groove extending along the longitudinal direction of the receiving body 1110, and are formed in one direction (X-axis direction based on FIG. 4). It can be placed spaced apart. In this case, a plurality of partition units 1120 are provided to divide the internal space of the receiving body 1110 into three or more spaces. As the plurality of partition units 1120 move, three or more partitions 1120 are accommodated in three or more spaces. Different substances may be mixed with each other through the bypass unit 1111.

Referring to FIGS. 2 to 4, the partition 1120 is movable while making surface contact with the circumference of the inner peripheral surface of the receiving body 1110, and can selectively partition the first space (S1) and the second space (S2). You can.

In one embodiment, the partition 1120 may be formed in a cylindrical shape so that the outer peripheral surface can be in surface contact with the inner circumferential surface of the receiving body 1110, but it is not limited thereto, and the cross section of the partition 1120 is the receiving body 1110. It may be formed to correspond to the shape of the inner peripheral surface of (1110).

The outer diameter of the partition 1120 may be the same as the inner diameter of the receiving body 1110, specifically, the inner diameter of the receiving body 1110 in which the bypass portion 1111 is not formed, or may be formed to be relatively large. As a result, the partition 1120 makes surface contact with the inner circumferential surface of the receiving body 1110 where the bypass part 1111 is not formed by force fitting, so that the internal space of the receiving body 1110 with respect to the partition 1120 is It may be divided into a first space (S1) and a second space (S2).

Through this, when the plunger portion 1400 does not move, the first material (M1) and the second material accommodated inside the receiving body (1110) are separated by the partition portion (1120) to prevent them from mixing with each other. You can.

Referring to FIG. 4, the circumferential length of the outer peripheral surface of the partition portion 1120 may be relatively smaller than the circumferential length of the inner peripheral surface of the receiving body 1110 where the bypass portion 1111 is formed. In addition, the length that the partition portion 1120 extends along the longitudinal direction of the receiving body 1110 may be formed to be relatively smaller than the length that the bypass portion 1111 extends along the longitudinal direction of the receiving body 1110. .

Referring to FIG. 5B, when the plunger portion 1400 advances toward the injection portion 1200 due to an external force, the second space formed by the partition portion 1120 and the head portion 1420 of the plunger portion 1400 The size of (S2) is reduced. As a result, the pressure of the second material M2 located in the second space S2 increases, and the second material M2 can advance the partition 1120 toward the injection unit 1200.

When the partition unit 1120 advances to one side of the receiving body 1110 where the bypass unit 1111 is formed, the first space S1 and the second space S2 are formed where the bypass unit 1111 is formed. The inner peripheral surface of the receiving body 1110 and the inner peripheral surface of the partition 1120 may communicate through a space formed, and the first material M1 and the second material M2 may be mixed through the space.

In one embodiment, the partition 1120 may be formed of an elastic material such as rubber. As a result, the outer circumferential surface of the partition 1120 and the inner circumferential surface of the receiving body 1110 may come into close contact due to the elastic force of the partition 1120.

Referring to FIGS. 2, 3, and 6, the injection unit 1200 according to the first embodiment of the present invention is connected to the receiving body 1110 and the filter portion, respectively, and the first filter received in the receiving body 1110 An discharge path for at least one of the material M1 and the second material M2 may be provided.

In one embodiment, the injection unit 1200 may include an injection body 1210 that forms the exterior.

Referring to FIG. 6, an injection hole 1210h is formed on one side of the injection unit 1200 and communicates with the internal space of the main body 1100, and on the other side opposite to the one side, the internal space of the main body 1100 is formed. and an exhaust hole portion 1214 that communicates with the injection hole portion 1210h, respectively, may be formed.

Additionally, an inlet hole portion 1212 communicating with the internal space of the receiving body 1110 may be formed on one side of the injection body 1210 facing the receiving body 1110.

A flow path portion 1211 is formed inside the injection body 1210, and the flow path portion 1211 may include a first flow path 1211a and a second flow path 1211b that communicate with each other.

The first flow path (1211a) and the second flow path (1211b) provide a movement path (R_G) for the chemical liquid (DS) and the gas contained in the chemical liquid (DS) inside the injection body 1210. (1211a) communicates the inlet hole portion 1212 and the second flow path 1211b, and the second flow path 1211b communicates with the inlet hole portion 1212 and one side of the first flow path 1211a. That is, the flow path portion 1211 may be formed in a shape that communicates the injection hole portion 1210h, the inlet hole portion 1212, and the exhaust hole portion 1214 with each other.

In one embodiment, the flow path portion 1211 may be formed in a 'T' shape, and an injection hole portion 1210h, an inlet hole portion 1212, and an exhaust hole portion 1214 may be formed at each end of the 'T' shape. You can.

Referring to Figure 6, the first flow path (1211a) and the second flow path (1211b) may be connected at right angles to each other, but are not limited to this, and the first flow path (1211a) and the second flow path (1211b) may be connected at various angles. there is.

The first flow path 1211a may be connected to one side of the second flow path 1211b that is relatively closer to the exhaust hole portion 1214 than the injection hole portion 1210h. As a result, even if the gas (G) flowing into the second flow path (1211b) through the first flow path (1211a) moves toward the injection hole portion (1210h), space is provided so that it can move back toward the exhaust hole portion (1214) due to buoyancy. can do.

An injection hole portion 1210h, an exhaust hole portion 1214, and an inlet hole portion 1212 are formed in different areas of the outer peripheral surface of the injection main body 1210, and the injection hole portion 1210h and the exhaust hole portion 1214 are formed in a second flow path ( 1211b), and the inlet hole portion 1212 and the second flow path 1211b may be communicated through the first flow path 1211a.

The injection hole portion 1210h communicates with the patient's body or an external device, and provides a path through which the drug solution (DS) contained in the drug injection device 1 is discharged to the outside. The injection hole portion 1210h is a hole on one side of the injection body 1210. It can be formed in the shape of wealth.

The injection hole portion 1210h may be formed on the other side of the injection body 1210 opposite to one side of the injection body 1210 where the exhaust hole portion 1214 is formed.

Referring to FIG. 6, the injection hole 1210h is formed on one side (lower side in FIG. 6) of the injection main body 1210, and the exhaust hole 1214 is formed on the other side of the injection main body 1210 (Figure 6) opposite to the one side. It can be formed on the upper side of the reference. For this reason, when the drug injection device 1 is disposed so that the injection hole 1210h faces the ground and the drug solution DS is discharged, the gas G contained in the drug solution DS moves against the ground due to buoyancy. By moving in this direction, it can be separated from the chemical solution DS and exhausted to the outside through the exhaust hole 1214.

In one embodiment, the injection hole portion 1210h and the exhaust hole portion 1214 may be formed at a preset interval on the injection body 1210. As a result, the second flow path 1211b that communicates the injection hole 1210h and the exhaust hole 1214 can be formed to extend by the above-mentioned gap, so the inner space of the second flow path 1211b is filled with the chemical solution (DS) and the gas (G). ) can provide space for separation.

The second flow path 1211b may be formed in the shape of a straight pipe, and the injection hole portion 1210h and the exhaust hole portion 1214 may be formed on the longitudinal central axis of the second flow path 1211b.

Referring to FIG. 6, one surface of the injection unit 1200 where the exhaust hole unit 1214 is formed may be in surface contact with the filter unit. A detailed explanation regarding the filter part will be provided later.

On one side of the injection unit 1200 where the exhaust hole unit 1214 is formed, a filter seating unit 1215 on which the filter unit can be seated may be formed in the shape of a groove.

The inner diameter of the filter seating portion 1215 may be formed to be relatively larger than the inner diameter of the exhaust hole portion 1214, and the depth of the filter seating portion 1215 may be formed to be equal to or relatively larger than the thickness of the filter portion.

The filter portion may be in surface contact with the inner peripheral surface of the filter seating portion 1215, and an adhesive member (not shown) may be disposed between the filter portion and the filter seating portion 1215. However, it is not limited to this, and the filter unit and the filter seating unit 1215 may be connected in various ways.

Referring to FIGS. 2, 3, and 6, a fastening groove into which the fastening portion 1115 of the receiving body 1110 can be seated may be formed on one surface of the injection body 1210 facing the receiving body 1110. Specifically, the fastening groove may be formed on an area of the injection body 1210 where the inlet hole 1212 is formed.

The inner diameter of the fastening groove may be the same as the outer diameter of the fastening portion 1115 or may be relatively small. As a result, the fastening part 1115 is inserted into the fastening groove in an interference fit manner, thereby preventing the chemical solution DS from leaking into the space between the fastening part 1115 and the fastening groove.

However, it is not limited to this, and the inner diameter of the fastening groove may be formed to be relatively larger than the outer diameter of the fastening portion 1115.

On one side of the injection body 1210 where the fastening groove is formed, an insertion portion insertable into one side of the receiving body 1110 may be formed to protrude, and the insertion portion may be arranged so that its outer peripheral surface faces the inner peripheral surface of the fastening groove.

In one embodiment, the length at which the insertion part protrudes in one direction (X-axis direction based on FIG. 3) may be relatively smaller than the depth of the fastening groove in one direction.

The outer diameter of the insertion portion may be the same as or relatively larger than the diameter of the front opening 1115h or the inner diameter of the fastening portion 1115. As a result, the insertion part is inserted into the front opening 1115h in an interference fit manner, and the inner peripheral surface of the insertion part and the fastening part 1115 make firm surface contact, so that the chemical solution DS enters the space between the insertion part and the fastening part 1115. Leakage can be prevented.

However, it is not limited to this, and the outer diameter of the insertion portion may be relatively larger than the diameter of the front opening 1115h or the inner diameter of the fastening portion 1115.

An inlet hole portion 1212 may be formed on one side of the insertion portion facing the receiving body 1110, and the insertion portion may be inserted into the front opening 1115h so that the inlet hole portion 1212 and the internal space of the receiving body 1110 may communicate. You can.

In an optional embodiment, a groove (not shown) in which a separate sealing member can be seated may be formed along the circumferential direction on the outer peripheral surface of the insertion part. As a result, the sealing member seated in the groove is in close contact with the outer peripheral surface of the insertion portion and the inner peripheral surface of the fastening portion 1115, respectively, thereby preventing the chemical solution DS from leaking into the space between the insertion portion and the fastening portion 1115. .

Referring to FIGS. 2, 3, and 6, the filter unit according to the first embodiment of the present invention is disposed on a path that communicates the inner space and the outer space of the main body portion 1100, and includes a first material (M1) and The gas (G) included in at least one of the second materials (M2) can be selectively discharged.

Specifically, the filter unit can be in surface contact with one surface of the injection body 1210 where the exhaust hole 1214 is formed, and can selectively exhaust the gas G contained in the chemical solution DS.

In an optional embodiment, one side of the filter unit may be inserted into the exhaust hole 1214 to the second flow path 1211b, and various modifications are made within the technical idea of limiting liquid from being discharged to the outside through the exhaust hole 1214. Implementation is possible.

The filter unit includes a polycarbonate membrane filter, a nylon membrane filter, a polysulfone membrane filter, a polyvinylidene fluoride membrane filter, and a cellulose acetate membrane filter ( It can be made of various filters that can selectively transmit gas (G), such as a cellulose acetate membrane filter and a polytetrafluoroethylene membrane filter.

Referring to FIG. 6, the chemical solution DS flowing into the second flow path 1211b through the inlet hole 1212 and the first flow path 1211a may include gas G. The gas (G) flowing into the second flow path (1211b) moves toward the exhaust hole portion (1214), passes through the filter unit, and is exhausted to the outside. The gas (G) is exhausted and the gas (G) saturation is reduced (DS). ) is discharged to the outside through the injection hole 1210h.

Referring to FIGS. 1 to 4, the plunger portion 1400 according to the first embodiment of the present invention is inserted into one side of the main body 1100 and is movable in a preset section, and includes a rod portion 1410, It may include a head portion 1420.

The plunger part 1400 can move in a preset direction inside the receiving body 1110, and as the plunger part 1400 moves, the first space (S1) and the second space (S2) can be selectively communicated. there is.

The rod portion 1410 may be formed in the shape of a shaft, and one side of the rod portion 1410 may be inserted into the interior of the receiving body 1110 while making surface contact with the inner peripheral surface of the receiving body 1110.

The rod unit 1410 may share a longitudinal central axis with the receiving body 1110, and the rod unit 1410 may be capable of sliding movement within the receiving body 1110 along the longitudinal central axis.

The other end opposite to one end of the rod part 1410 inserted into the receiving body 1110 may be connected to the cap part 1520, which will be described later. Due to this, when the user applies force to the cap part 1520 in one direction (X-axis direction based on FIG. 4), the rod part 1410 connected to the cap part 1520 moves in this one direction, and the head part 1420 and the chemical liquid Force can be transmitted to (DS).

The head portion 1420 is located inside the receiving body 1110 and can selectively contact the rod portion 1410 as the rod portion 1410 moves, and slides while making surface contact with the inner peripheral surface of the receiving body 1110. Movement is possible.

Referring to FIGS. 3 and 4, the head portion 1420 is located inside the receiving body 1110, and is located between an area of the receiving body 1110 where the partition 1120 and the rear opening 1110h are formed. can be placed. Through this, one side of the partition portion 1120, one side of the head portion 1420, and the inner peripheral surface of the receiving body 1110 can form a second space S2, which is a closed space.

In one embodiment, the head portion 1420 may be formed in a cylindrical shape, but the present invention is not limited thereto, and the cross section of the head portion 1420 may be formed to correspond to the shape of the inner peripheral surface of the receiving body 1110.

The outer diameter of the head portion 1420 may be the same as the inner diameter of the receiving body 1110 or may be formed to be relatively large. Due to this, the head portion 1420 can be forcefully fitted to the inner peripheral surface of the receiving body 1110 and make surface contact, and through this, the first material (M1) or the second material (M2) accommodated in the receiving body 1110 is connected to the head portion. Leakage between (1420) and the receiving body (1110) can be prevented.

In one embodiment, the head portion 1420 may be formed of an elastic material such as rubber. As a result, the outer peripheral surface of the head unit 1420 and the inner peripheral surface of the receiving body 1110 may be brought into close contact due to the elastic force of the head unit 1420.

The head portion 1420 and the partition portion 1120 may be formed in the same shape, but are not limited thereto. The head portion 1420 is in surface contact with the inner peripheral surface of the receiving body 1110, and the receiving body 1110 It can be formed into various shapes within the technical idea of dividing the internal and external spaces of.

In an optional embodiment, the head portion 1420 may be formed integrally with the rod portion 1410.

Referring to FIGS. 1 and 2, the housing portion 1500 according to the first embodiment of the present invention forms the exterior of the drug injection device 1 and includes a housing body 1510 and a cap portion 1520. can do.

The housing body 1510 covers the injection unit 1200 and the main body 1100, and protects the injection unit 1200 and the main body 1100 from the outside, while also protecting the injection unit 1200 and the main body (1100). 1100) can be fixed in position.

A label opening 1510h may be formed in the shape of a hole on one surface of the housing main body 1510 corresponding to the area where the main body 1100 is located. As a result, the user can check the operation of the main body 1100, the first material (M1) and the second material (M2), the degree of mixing of the chemical solution (DS), the remaining degree of the chemical solution (DS), etc. through the label opening 1510h. It can be observed.

A housing opening 1511 may be formed in the shape of a hole on one surface of the housing body 1510 corresponding to the area where the injection hole 1210h is located. As a result, one side of the injection main body 1210 where the injection hole 1210h is formed can be exposed to the outside through the housing opening 1511, so that the chemical solution DS enters the housing main body 1510 through the injection hole 1210h. may be discharged to the outside.

Referring to FIGS. 1 to 4 , the cap portion 1520 may be connected to one end of the housing portion 1500 and the plunger portion 1400, respectively.

Specifically, the cap portion 1520 may be connected to the housing portion 1500 to enable relative movement, and may be connected to the plunger portion 1400 in a fixed position. Due to this, when the user applies force to the cap portion 1520 in one direction (X-axis direction based on FIG. 3), the cap portion 1520 moves in the one direction while making surface contact with the housing portion 1500, and the cap portion 1520 The plunger portion 1400, which is fixedly connected to the surface, may also move in the one direction and apply pressure in the one direction to at least one of the first material M1, the second material M2, and the partition portion 1120.

Hereinafter, the operating principle and effects of the drug injection device 1 according to the first embodiment of the present invention will be described.

In this specification, the operating principles and methods are described in chronological order for convenience of explanation, and the operating principles and methods described below are not limited to the order of explanation and can be performed simultaneously.

In the drug injection device 1 according to the first embodiment of the present invention, the first space S1 and the second space S2 formed in the inner space of the main body 1100 are selectively formed as the plunger portion 1400 moves. It relates to a device in which substances contained in the first space (S1) and the second space (S2) are mixed with each other.

Referring to FIGS. 3, 4, and 5A, the partition 1120 makes surface contact along the inner peripheral surface of the receiving body 1110, and divides the internal space of the receiving body 1110 into the first space S1 and the second space S1. It can be divided into space (S2).

Hereinafter, the 'first space (S1)' can be interpreted as the internal space of the receiving body 1110 adjacent to the injection part 1200 based on the partition 1120, and the 'second space (S2)' is The partition portion 1120 can be interpreted as the internal space of the receiving body 1110 adjacent to the plunger portion 1400.

The first space S1 may be formed by the inner peripheral surface of the receiving body 1110, one side of the partition 1120, and one side of the receiving body 1110 on which the front opening 1115h is formed, and the first space S1 A first material (M1) such as a liquid such as an aqueous solution may be accommodated.

The second space (S2) may be formed by the inner circumferential surface of the receiving body 1110, the other side of the partition 1120, and one side of the head 1420. The second space S2 includes drugs such as drugs. A second material (M2) can be accommodated.

The diameter of the partition 1120 is the same as or relatively large than the diameter of the receiving body 1110, so that the outer peripheral surface of the partition 1120 and the inner peripheral surface of the receiving body 1110 can be firmly surface-contacted. As a result, the first space S1 and the second space S2 are partitioned, thereby limiting contact between the first material M1 and the second material M2.

Referring to FIGS. 3, 4, and 5B, when a user applies force to the cap portion 1520, the rod portion 1410 connected to the cap portion 1520 moves along the longitudinal direction of the receiving body 1110. .

Specifically, one side of the rod portion 1410 is located inside the receiving body 1110 through the rear opening 1110h of the receiving body 1110, and the rod portion 1410 receives force from the cap portion 1520 and receives it. Inside the main body 1110, it moves along the longitudinal direction of the receiving body 1110.

As the rod portion 1410 moves along the longitudinal direction of the receiving body 1110, one end of the rod portion 1410 contacts the head portion 1420 disposed between the partition portion 1120 and the rod portion 1410. Thus, the rod portion 1410 and the receiving body 1110 can be moved integrally along the longitudinal direction.

The head portion 1420 may receive force from the rod portion 1410 and advance while making surface contact with the circumference of the inner peripheral surface of the receiving body 1110. As the head portion 1420 advances, the head portion 1420 and the partition portion ( The size of the second space S2 formed by 1120) is reduced. As a result, the second material M2 accommodated in the second space S2 is pushed toward the partition 1120, so that the partition 1120 can also advance in the same direction as the head part 1420.

The partition portion 1120 may receive force from the second material M2 and move to the area where the bypass portion 1111 is formed. Since the bypass portion 1111 is formed in the shape of a groove concave outward from the inner peripheral surface of the receiving body 1110, the cross-sectional area of the internal space of the receiving body 1110 where the bypass portion 1111 is formed is the partition area. It is relatively wider than the cross-sectional area of (1120).

For this reason, when the partition 1120 is located in the inner area of the receiving body 1110 where the bypass part 1111 is formed, the space formed by the outer peripheral surface of the partition 1120 and the inner peripheral surface of the bypass part 1111 As the first space (S1) and the second space (S2) are communicated, the first material (M1) accommodated in the first space (S1) and the second material (M2) accommodated in the second space (S2) can be mixed with each other.

Referring to FIGS. 3, 4, and 5C, the first material (M1) and the second material (M2) may be mixed through the bypass portion 1111 to generate a chemical solution (DS), and the plunger portion 1400 ) continues to advance along the longitudinal direction of the receiving body 1110, the chemical solution (DS) accommodated inside the receiving body 1110 may be discharged to the outside of the receiving body 1110.

Referring to FIGS. 5C and 6, the fastening portion 1115 of the receiving body 1110 is seated in the fastening groove and at the same time, the insertion portion of the injection body 1210 is inserted into the front opening 1115h of the receiving body 1110. , the receiving body 1110 and the injection body 1210 may be combined.

An injection hole 1210h is formed on one side of the injection body 1210 to provide a path through which the chemical solution DS is discharged, and an exhaust hole 1214 through which the gas G is exhausted is formed on the other side of the injection body 1210.

In addition, a first flow path 1211a and a second flow path 1211b communicating with the first flow path 1211a are formed inside the injection main body 1210, and the second flow path 1211b is connected to the injection hole 1210h and the exhaust. It is formed in the shape of a pipe communicating with the hole portion 1214, and the first flow path 1211a may be formed in the shape of a pipe communicating with one side of the inlet hole portion 1212 and the second flow path 1211b.

The chemical solution (DS) accommodated in the receiving body 1110 may flow into the first flow path 1211a through the inflow hole 1212 as the plunger part 1400 moves, and may flow into the first flow path 1211a. The chemical solution DS moves to the second flow path 1211b.

The chemical solution (DS) moving to the second flow path (1211b) may include gas (G), and the gas (G) moves toward the exhaust hole portion 1214 and passes through the filter unit that selectively transmits the gas (G). It can be discharged to the outside, and the chemical solution (DS) that does not contain gas (G) or has a low gas (G) saturation does not pass through the filter unit and can be discharged to the outside through the injection hole portion (1210h).

That is, the second flow path 1211b communicates with the exhaust hole 1214, which selectively allows only the gas G to pass through the filter unit, and the injection hole 1210h, which allows the chemical solution DS to be discharged, respectively, so that the gas movement path R_G ) and the movement path (R_DS) of the chemical solution can be provided at the same time.

As a result, the exhaust hole unit 1214 and the filter unit provide a gas movement path (R_G) that is distinct from the chemical liquid movement path (R_DS), thereby lowering the gas (G) saturation of the chemical liquid (DS), thereby increasing the gas (G) saturation. It can reduce the adverse effects that occur when a high chemical solution (DS) is injected into the patient's body.

Hereinafter, the drug injection device 2 according to the second embodiment of the present invention will be described.

Figure 7 is a perspective view of a drug injection device according to a second embodiment of the present invention. Figure 8 is a cross-sectional view taken along line III-III' in Figure 7. Figure 9 is a cross-sectional view taken along line IV-IV' in Figure 7. Figure 10 is a cross-sectional view taken along line V-V' of Figure 7. Figure 11 is a diagram for explaining the use state of the plunger portion according to the second embodiment of the present invention. Figures 12A to 12E are diagrams for explaining the state of use of the drug injection device according to the second embodiment of the present invention. Figure 13 is an exploded view to explain the combined state of the receiving body, the first plunger, and the second plunger of the drug injection device according to the second embodiment of the present invention. Figure 14 is an exploded view of part B of Figure 13 enlarged.

7 to 9, the drug injection device 2 according to the second embodiment of the present invention includes a main body portion 2100, a receiving portion 2200, a plunger portion 2300, and a filter portion 2600. can do.

The main body portion 2100 according to the second embodiment of the present invention forms the exterior of the drug injection device 2 and may be formed in the shape of a hollow tube with an injection hole portion 2110 formed at one end.

The injection hole portion 2110 provides a discharge path through which the chemical solution (DS) contained within the main body portion 2100 is discharged to the outside. The injection hole portion 2110 is the main body portion 2100 on which the plunger portion 2300 is disposed. ) may be formed in the shape of a hole portion on the other end opposite to one end of the.

In one embodiment, a needle (reference numeral not set) that communicates the internal space and external space of the main body 2100 may be inserted into the injection hole 2110.

The receiving part 2200 may be inserted into the main body 2100 while making surface contact along the inner peripheral surface of the main body 2100, and one side of the plunger part 2300 may be inserted into the main body 2100. there is.

Referring to FIGS. 9 and 10, a passing groove 2120 may be formed on one inner surface of the main body 2100 according to the second embodiment of the present invention.

The passage groove 2120 may be formed in the shape of a groove that passes through the injection hole 2110. Specifically, the inner peripheral surface of the passage groove 2120 may be connected to the inner peripheral surface of the injection hole 2110, and the chemical solution (DS) may pass through. It may flow into the injection hole 2110 along the groove 2120 and be discharged to the outside.

The passage groove 2120 may be formed in the shape of a cross. However, it is not limited to this, and the passage groove 2120 is disposed to intersect the injection hole 2110 on one inner surface of the main body 2100 where the injection hole 2110 is formed, so that the chemical solution DS flows through the injection hole 2110. ) can be formed in various shapes within the technical idea of providing a discharge path to flow.

For this reason, referring to FIG. 12C, when the first plunger 2400 advances toward the injection hole portion 2110, the partition portion 2420, which will be described later, is formed on one inner surface of the main body portion 2100 where the injection hole portion 2110 is formed. Even if surface contact is made, the passage groove portion 2120 communicates the internal space of the main body portion 2100 with the injection hole portion 2110, creating a path through which the chemical solution (DS) contained in the main body portion 2100 can be discharged to the outside. can be provided.

Referring to FIG. 7 , a first switch unit 2130 whose position can be selectively changed by receiving an external force may be disposed on one side of the main body unit 2100.

In one embodiment, the first switch portion 2130 may be formed on one side of the main body portion 2100 facing the movement limiting portion 2432 of the first plunger 2400, which will be described later, and the main body portion ( 2100) can be formed by cutting one side into a 'U' shape.

A plurality of first switch units 2130 may be provided, and the plurality of first switch units 2130 may be arranged at a preset angle with respect to the longitudinal central axis of the main body 2100.

However, it is not limited to this, and the first switch unit 2130 is disposed on one side of the main body 2100 facing the movement restriction unit 2432, and selectively operates with the movement restriction unit 2432 by receiving a force from the outside. It can be formed into various shapes within the technical ideas that can be contacted.

Referring to FIGS. 8 and 9, the receiving portion 2200 according to the second embodiment of the present invention is movable while making surface contact with the circumference of the inner peripheral surface of the main body portion 2100, and may have a hollow interior.

The receiving part 2200 is formed in the shape of a hollow tube and may include a receiving body 2210 in surface contact with the circumference of the inner peripheral surface of the main body 2100.

Specifically, the receiving body 2210 may be formed in the shape of a hollow tube whose length is relatively shorter than the main body 2100, and the outer peripheral surface of the receiving body 2210 is in surface contact with the inner peripheral surface of the main body 2100, and the receiving body 2100 The inner peripheral surface of 2210 may be in surface contact with the partition portion 2420 and the head portion 2520, which will be described later.

The inner peripheral surface of the receiving body 2210 may be connected to the outer peripheral surface of the partition portion 2420 to enable sliding movement.

For this reason, referring to FIG. 12a, when the first plunger 2400 moves in one direction (X-axis direction based on FIG. 8), the outer peripheral surface of the partition portion 2420 contacts the inner peripheral surface of the receiving body 2210 and moves in one direction. By moving, the first space (S1) and the second space (S2) can be communicated, and in this case, the movement of the partition 2420 does not affect the position of the receiving body 2210.

The receiving body 2210 may be disposed on one side of the main body 2100 where the injection hole 2110 is formed and the plunger 2300, and the second plunger 2500, which will be described later, is oriented in one direction (X based on FIG. 8). As it moves in the axial direction, the receiving body 2210 may selectively contact the second plunger 2500 and move in one direction together with the second plunger 2500.

On the outer peripheral surface of the receiving body 2210, a first sealing groove portion 2211a and a second sealing groove portion 2211b may be formed in the shape of a groove portion along the circumferential direction.

A sealing member (SL) may be seated in each of the first sealing groove portion (2211a) and the second sealing groove portion (2211b), and the sealing member (SL) contacts the receiving body 2210 and the main body portion 2100, respectively, The fixing force between the outer peripheral surface of the receiving body 2210 and the inner peripheral surface of the main body 2100 can be strengthened.

As a result, even if friction occurs between the outer peripheral surface of the compartment 2420 and the inner peripheral surface of the receiving body 2210 as the partition 2420 moves while making surface contact with the inner peripheral surface of the receiving body 2210, it is accommodated by the sealing member SL. The fixing force between the outer peripheral surface of the main body 2210 and the inner peripheral surface of the main body portion 2100 is strengthened, so that the position of the receiving body 2210 can be fixed.

In an optional embodiment, one sealing groove may be formed, but the present invention is not limited thereto and there is no limit to the number of sealing grooves.

Referring to FIGS. 8, 9, and 11, the plunger portion 2300 according to the second embodiment of the present invention is inserted into one side of the main body 2100 and is movable in a preset section, and is connected to the first plunger. (2400), and may include a second plunger (2500).

The first plunger 2400 is located inside the main body 2100 and moves forward toward the receiving part 2200 to selectively communicate with the internal space of the receiving part 2200 and the internal space of the main body 2100. You can.

In one embodiment, the first plunger 2400 may include a first rod portion 2410, a partition portion 2420, a sliding body 2430, and an elastic member 2440.

The first rod portion 2410 may be formed in the shape of a shaft extending along the longitudinal central axis of the main body portion 2100.

One end of the first rod 2410 may be connected to the partition 2420, and the other end may be connected to the sliding body 2430.

Referring to FIGS. 8, 9, and 13, the first rod portion 2410 may be disposed to penetrate the second plunger 2500, and the first rod portion 2410 may be positioned relative to the second plunger 2500. It can be connected to enable movement. Specifically, the first rod 2410 may penetrate the protrusion 2513 and the head 2520 at the same time, and the first rod 2410 may move relative to the protrusion 2513 and the head 2520, respectively. Possibly connected.

That is, one end of the first rod portion 2410 is connected to the partition portion 2420, and the first rod portion 2410 is connected to the second plunger 2500, specifically the second rod portion 2510 and the head portion 2520. ) can be connected to the sliding body 2430.

For this reason, referring to FIG. 12a, when the sliding body 2430 moves in one direction (X-axis direction based on FIG. 8) along the second rod portion 2510, it is connected to the sliding body 2430 and the second plunger 2500 ) The first rod portion 2410 penetrating can advance in one direction without affecting the position of the second plunger 2500, and the partition portion 2420 can also advance integrally with the first rod portion 2410. You can.

Through this, referring to FIG. 12b, the partition 2420 and the receiving body 2210 are spaced apart, so that the first space (S1) and the second space (S2) are communicated, so that the first material (M1) and the second material ( This has the effect of making mixing of M2) possible.

Referring to FIGS. 8, 9, and 13, the partition 2420 according to the second embodiment of the present invention is connected to the sliding body 2430, and as the sliding body 2430 moves, the receiving portion 2200 It is possible to selectively contact the circumference of the inner surface of the surface.

The outer peripheral surface of the compartment 2420 is movable while making surface contact with the inner peripheral surface of the receiving body 2210.

In one embodiment, a groove (reference symbol not set) into which a separate sealing member (SL) can be seated may be formed on the outer peripheral surface of the partition 2420. The sealing member SL may be seated in the groove and contact the inner peripheral surface of the receiving body 2210.

As a result, the sealing member (SL) restricts the movement of materials between the inside and outside of the receiving body 2210, so that when the plunger portion 2300 does not move, the first material (M1) and the second material (M2) Mixing may be limited.

Referring to FIGS. 8, 9, and 12, the sliding body 2430 is movable on the second plunger 2500 and can be connected to the first rod portion 2410 while sharing a longitudinal central axis.

Referring to FIG. 12, the sliding body 2430 may be capable of sliding movement along the rail portion 2511 formed on the second rod portion 2510.

Specifically, the rail portion 2511 may be formed in the shape of a slot extending along the longitudinal central axis of the second rod portion 2510, and the sliding body 2430 is inserted into the slot-shaped rail portion 2511. It is possible to slide along the longitudinal direction of the second rod unit 2510.

In one embodiment, one surface of the sliding body 2430 can move while making surface contact with one surface of the second rod part 2510 on which the rail part 2511 is formed.

Because of this, the movement path of the sliding body 2430 can be guided by the rail portion 2511.

Referring to FIGS. 8 and 11 , at least one wing portion 2431 capable of selectively contacting one side of the main body portion 2100 may be formed on one side of the sliding body 2430.

The wing portion 2431 may be located on one side of the sliding main body 2430 that faces one side of the main body portion 2100 where the first switch portion 2130 is located.

The wing portion 2431 may be formed in a shape in which one surface of the sliding body 2430 is cut into a 'U' shape.

One end of the wing portion 2431 is fixed to the sliding body 2430, and the other end of the wing portion 2431 may be spaced apart from the sliding body 2430 by a preset distance.

However, it is not limited to this, and the wing portion 2431 may be formed in a shape that can be deformed so that it is bent toward the central axis in the longitudinal direction of the main body portion 2100 when receiving force from the outside.

The wing portion 2431 may be in surface contact with the main body portion 2100, specifically the first switch portion 2130, and when the first switch portion 2130 is bent inward by applying an external force, the first switch portion 2130 The wing portion 2431 in surface contact with 2130 may be bent inward by receiving an external force from the first switch portion 2130.

A movement restriction portion 2432 may be formed to protrude outward on one side of the wing portion 2431. Specifically, on one side of the wing portion 2431, a movement restriction portion 2432 may be formed to protrude in the side direction of the inner peripheral surface of the main body portion 2100 to form a step.

Referring to Figures 7 and 8, the movement limiting part 2432 is in surface contact with the first switch part 2130, and the step formed by the moving limiting part 2432 is the main body forming the first switch part 2130. It can be in surface contact with the cutting surface of unit 2100.

In one embodiment, the movement restriction unit 2432 is in surface contact with one inner surface of the first switch unit 2130, and the step formed by the movement restriction unit 2432 faces the side of the first switch unit 2130. It can be contacted/fastened with one side of the main body 2100.

As a result, the step formed by the movement limiting part 2432 comes into surface contact/fastening with one side of the main body part 2100 facing the side of the first switch part 2130, so that the sliding main body 2430 is connected to the partition part 2420. Movement in the lateral direction can be restricted.

That is, by protruding one side of the wing portion 2431 and hooking it on one side of the main body portion 2100, movement of the first plunger 2400 is restricted, and the first material M1 and the second material M2 are separated. Mixing can be prevented.

When the first switch unit 2130 moves inward by receiving an external force, the movement limiter 2432 in surface contact with the first switch unit 2130 also moves inward, and the movement limiter 2432 is moved inward. It may be spaced apart from one side of the main body portion 2100 facing the side of the first switch portion 2130.

As a result, by applying an external force to the first switch unit 2130, the movement limiter 2432 and one surface of the main body 2100 can be spaced apart to selectively allow movement of the first plunger 2400.

That is, the user applies an external force to the first switch unit 2130 to separate the movement limiter 2432 hanging on one side of the main body 2100 from the main body 2100 and moves the first plunger 2400 in one direction (Figure 2). 8, movement in the reference .

Referring to FIGS. 8, 9, and 11, the elastic member 2440 is capable of contacting one inner side of the main body 2100 and the sliding main body 2430, respectively, and can apply elastic force to the sliding main body 2430. .

Specifically, the elastic member 2440 is connected to the sliding body 2430 and can apply force to the sliding body 2430 in one direction (X-axis direction based on FIG. 8).

As a result, the movement limiting part 2432 moves inward and the moving limiting part 2432 and the main body 2100 are separated, so that the sliding main body 2430 can freely move along the rail part 2511, the sliding main body ( 2430 may receive elastic force from the elastic member 2440 and move in the one direction along the rail portion 2511.

The elastic member 2440 may be made of various devices that can apply pressure to the sliding body 2430, such as a spring or piston.

Referring to FIGS. 8, 9, and 11, the second plunger 2500 is accommodated in the inner space of the receiving portion 2200 and the inner space of the main body portion 2100 as it advances toward the receiving portion 2200. By discharging the first material (M1) and the second material (M2) to the outside of the main body portion (2100), it includes a second load portion (2510), a head portion (2520), and a second switch portion (2530). can do.

The second rod portion 2510 may be arranged to be movable while making surface contact with the inner peripheral surface of the main body portion 2100, and may be formed in a shape extending along the longitudinal direction of the main body portion 2100.

The second rod unit 2510 may share a longitudinal central axis with the first rod unit 2410.

The second load part 2510 may selectively contact the receiving part 2200. Specifically, when the second rod portion 2510 moves in one direction (X-axis direction based on FIG. 8), one surface of the second rod portion 2510 (hereinafter referred to as ‘contact surface portion 2512’) faces the receiving portion 2200. ') can be in contact with the receiving part 2200, and the second rod part 2510 can move integrally along the one direction while contacting the receiving part 2200.

A head portion 2520 may be connected to one end of the second rod portion 2510 facing the injection hole portion 2110, and a second switch portion 2530 may be connected to the other end different from the one end. For this reason, when the user applies force to the second switch unit 2530 in one direction (X-axis direction based on FIG. 8), the second switch unit 2530, the rod unit, and the head unit 2520 are integrated into the one direction. You can move along.

The second plunger 2500 may have a rail portion 2511 formed in the longitudinal direction of the main body 2100 to provide a movement path for the first plunger 2400. Specifically, the second rod portion 2510 of the second plunger 2500 has a rail portion 2511 along the longitudinal direction of the main body 2100 to provide a movement path for the sliding body 2430 of the first plunger 2400. can be formed.

The rail portion 2511 may be formed in the shape of a slot extending along the longitudinal direction of the second rod portion 2510, and one surface of the second rod portion 2510 on which the rail portion 2511 is formed is a sliding body ( 2430) can be interviewed.

The rail portion 2511 may be formed in the shape of a slot that penetrates the second rod portion 2510 in one direction (Y-axis direction in FIG. 8) and extends in the other direction (X-axis direction in FIG. 8).

In an optional embodiment, the rail portion 2511 may be formed in the shape of a groove extending along the longitudinal direction of the second rod portion 2510 on the outer peripheral surface of the second rod portion 2510.

However, it is not limited to this, and the rail portion 2511 may be formed in various shapes that can provide a movement path for the sliding body 2430, such as protruding and extending along the longitudinal direction of the second rod portion 2510. .

Referring to FIGS. 8, 9, and 13, one surface of the second plunger 2500 facing the receiving portion 2200 is connected to the head portion 2520 and has a protrusion 2513 insertable into the receiving body 2210. can be formed.

The protrusion 2513 may be formed to protrude toward the receiving part 2200 along the longitudinal central axis of the second rod part 2510, and the outer diameter of the protruding part 2513 is relatively smaller than or equal to the inner diameter of the receiving body 2210. can be formed.

The length at which the protruding part 2513 protrudes from one surface of the second rod part 2510 may be formed to be equal to the length of the receiving part 2200 in one direction (X-axis direction based on FIG. 8).

For this reason, referring to FIGS. 12d and 12e, the protrusion 2513 is inserted into the receiving part 2200 until all parts of the outer peripheral surface of the protruding part 2513 come into surface contact with all parts of the inner peripheral surface of the receiving part 2200. Therefore, there is an effect that all of the chemical solution DS accommodated in the internal space of the receiving portion 2200 can be discharged to the outside.

Referring to FIG. 14, at least one first exhaust hole portion 2513h may be formed on one surface of the second plunger 2500 facing the receiving portion 2200.

In one embodiment, at least one first exhaust hole portion 2513h may be formed on one surface of the second rod portion 2510 connected to the head portion 2520.

The first exhaust hole portion 2513h may pass through the second rod portion 2510 and communicate with the external space of the drug injection device 2. Additionally, the first exhaust hole portion 2513h may communicate with the second exhaust hole portion 2520h formed in the head portion 2520.

Referring to FIG. 14, the gas G contained in the chemical solution DS may be exhausted to the outside of the drug injection device 2 through the second exhaust hole portion 2520h and the first exhaust hole portion 2513h.

As a result, in the process of the second plunger 2500 moving forward and discharging the chemical solution (DS) into the injection hole portion 2110, the gas (G) contained in the chemical liquid (DS) flows into the first and second exhaust hole portions (2513h, 2520h). The chemical solution (DS) with low gas (G) saturation can be injected into the user's body by being exhausted to the outside.

Referring to FIG. 14, a filter seating portion 2514 may be formed in the shape of a groove on one surface of the second rod portion 2510 connected to the head portion 2520. Specifically, the filter seating portion 2514 may be formed along the area where the first exhaust hole portion 2513h is formed on one surface of the second rod portion 2510 connected to the head portion 2520.

The filter seating portion 2514 provides a space in which the filter portion 2600 is seated, and may communicate with the first exhaust hole portion 2513h and the second exhaust hole portion 2520h, respectively.

Referring to FIG. 14, the filter seating portion 2514 may be formed as a ring-shaped groove centered on the longitudinal central axis of the second plunger 2500, and at the center of the ring shape is a first plunger ( A hole (reference symbol not set) through which 2400 passes may be formed, and at least one first exhaust hole 2513h may be formed on one side of the filter seating part 2514 facing the head part 2520. .

The filter seating portion 2514 may be formed between the head portion 2520 and one surface of the second rod portion 2510 where the first exhaust hole portion 2513h is formed.

Referring to FIG. 14, a filter unit 2600 that selectively transmits gas (G) may be mounted on the filter seating unit 2514. As a result, when the second plunger 2500 moves forward, the chemical solution (DS) accommodated in the main body portion 2100 moves to the filter seating portion 2514 through the second exhaust hole portion 2520h, and the filter seating portion ( The filter unit 2600 mounted on 2514) can selectively transmit only the gas G contained in the chemical solution DS and exhaust the gas G through the first exhaust hole 2513h.

That is, the first exhaust hole portion 2513h, the filter portion 2600 mounted on the filter seating portion 2514, and the second exhaust hole portion 2520h can provide a movement path for the gas (G), and the liquid chemical solution. (DS) cannot pass through the filter unit 2600, thereby preventing leakage to the outside through the first exhaust hole unit 2513h.

Referring to FIGS. 8, 9, 13, and 14, the head portion 2520 divides the inner space and the outer space of the receiving portion 2200, and makes surface contact with the inner peripheral surface of the receiving portion 2200. It may be formed in the shape of a movable plate.

The head portion 2520 may be connected to an end of the second rod portion 2510 adjacent to the receiving portion 2200.

The head portion 2520 may be formed with a second exhaust hole portion 2520h capable of communicating with at least one of the filter seating portion, the first exhaust hole portion 2513h, and the external space of the drug injection device 2.

In one embodiment, the longitudinal central axis of the second exhaust hole portion 2520h may be parallel to the longitudinal central axis of the first exhaust hole portion 2513h.

The second exhaust hole portion 2520h may communicate with the inner space of the main body portion 2100 or the inner space of the receiving portion 2200.

Referring to FIGS. 12D, 12E, and 14, when the first space (S1) or the second space (S2) is reduced as the second plunger (2500) advances, the chemical solution (DS) is injected into the injection hole portion (2110). and flows toward the second exhaust hole portion (2520h). In this case, only the gas (G) selectively passes through the filter unit 2600 and is exhausted to the first exhaust hole unit 2513h, and the chemical solution DS from which the gas G is exhausted does not pass through the filter unit 2600. It is discharged through the injection hole 2110.

Referring to FIGS. 7 to 9 , one side of the second switch unit 2530 may be inserted into the main body 2100 and connected to one end of the second rod unit 2510.

The second switch unit 2530 may be relatively movably connected to the main body unit 2100 and may be fixedly coupled to the second rod unit 2510.

For this reason, when the user applies force to the second switch unit 2530 in one direction, the second switch unit 2530 can move in the direction of insertion into the main body 2100, and the second switch unit 2530 and The second load unit 2510 can move integrally.

Hereinafter, the operating principle and effects of the drug injection device 2 according to the second embodiment of the present invention will be described.

The drug injection device 2 according to the second embodiment of the present invention has a first space S1 formed in the inner space of the main body 2100 and the inner space of the receiving portion 2200 as the first plunger 2400 moves. and the second space (S2) are selectively communicated, so that the materials contained in the first space (S1) and the second space (S2) are mixed with each other, and as the second plunger (2500) moves, the main body portion (2100) ) It relates to a device in which the space formed by the internal space and the receiving internal space is reduced, and the chemical solution (DS) is discharged to the outside.

Referring to FIGS. 7, 8, and 12A, the inner peripheral surface of the main body portion 2100, one surface of the receiving portion 2200 adjacent to the injection hole portion 2110, and the partition portion 2420 contain a first material (M1) such as an aqueous solution. It can form a first space (S1) to be accommodated, and the inner peripheral surface of the receiving portion (2200), the partition portion (2420), and the head portion (2520) are a second space ( S2) can be formed.

Before the plunger portion 2300 moves, the partition portion 2420 may separate the first space S1 and the second space S2 by making surface contact with the circumference of the inner peripheral surface of the receiving portion 2200. As a result, mixing of the first material M1 accommodated in the first space S1 and the second material M2 accommodated in the second space S2 may be limited.

In this case, the elastic member 2440 applies elastic force so that the first plunger 2400 moves forward, but the wing portion 2431 formed on the sliding body 2430 is caught on one side of the main body portion 2100, thereby causing the first plunger 2400 to move forward. 1 The movement of the plunger 2400 is restricted.

Referring to FIGS. 8 and 12B, when the user applies force to the first switch unit 2130, the first switch unit 2130 transmits force to the wing unit 2431 of the sliding body 2430, The wing portion 2431 receives force and is bent in a direction away from one side of the main body portion 2100.

As a result, the first plunger 2400 can move freely, and the sliding body 2430 receives force from the elastic member 2440 and moves forward toward the receiving portion 2200.

The sliding body 2430 can move in one direction (the The first load part 2410 and the partition part 2420 connected to 2430 also move along the one direction.

Referring to FIG. 13, the first rod portion 2410 connected to the sliding body 2430 penetrates the second rod portion 2510 and is connected to the partition portion 2420, and the sliding body 2430 moves in one direction. As it moves along, the first rod unit 2410 penetrates the second rod unit 2510 and moves in the one direction together with the partition unit 2420.

Referring to FIGS. 12B and 12C, the partition portion 2420 moves in one direction and is spaced apart from the inner peripheral surface of the receiving portion 2200. As a result, the first space S1 and the second space S2 communicate with each other, Mixing of the first material (M1) and the second material (M2) becomes possible.

Referring to Figure 12c, the sliding main body 2430 continues to receive force from the elastic member 2440, and the partition part 2420 comes into contact with one inner surface of the main body part 2100 where the injection hole part 2110 is formed. . Even if one surface of the partition 2420 is in surface contact with the inner surface of the main body 2100 where the injection hole 2110 is formed, the passage groove 2120 is formed on the inner surface of the main body 2100, thereby forming the injection hole 2110. The internal space of 2110 and the main body 2100 may be communicated through the space formed by the passage groove 2120 and the one surface of the partition 2420.

Referring to FIGS. 12C and 12D, the user can apply force in one direction to the second switch unit 2530, and the second switch unit 2530, second load unit 2510, and head unit 2520 receives the above force and moves as one body.

As the second rod portion 2510 moves in the one direction, the protrusion 2513 and the head portion 2520 are inserted into the inner space of the receiving portion 2200, and one surface, specifically the contact surface, of the second rod portion 2510 Part 2512 comes into contact with receiving part 2200.

As a result, the second rod part 2510 is inserted into the receiving part 2200 and comes into contact with it at the same time. The second load part 2510 and the receiving part 2200 can move as one unit by receiving the force applied to the second switch part 2530.

Referring to FIGS. 12D and 12E, the chemical solution DS is accommodated in the space formed by the inner peripheral surface of the main body portion 2100, one side of the receiving portion 2200 facing the injection hole portion 2110, and the head portion 2520. , As the second rod portion 2510 coupled with the receiving portion 2200 advances, the space is reduced so that the chemical solution DS can be injected to the outside through the discharge groove portion and the injection hole portion 2110.

Referring to FIGS. 12D, 12E, 13, and 14, as the second rod portion 2510 coupled to the receiving portion 2200 moves forward, the chemical solution DS accommodated in the main body portion 2100 is moved to the head portion ( It may also flow to the halter seating portion formed in the second rod portion 2510 through the second exhaust hole portion 2520h formed in 2520.

In this case, since the filter unit 2600 that selectively transmits the gas (G) is seated in the filter seating unit 2514, the gas (G) contained in the chemical solution (DS) passing through the second exhaust hole unit (2520h) Only water can flow into the first exhaust hole 2513h through the filter unit 2600, and the liquid chemical solution (DS) cannot pass through the filter unit 2600 and is discharged to the outside through the injection hole 2110. .

As a result, as the second plunger 2500 advances, the gas (G) contained in the chemical solution (DS) sequentially passes through the second exhaust hole portion (2520h), the filter portion (2600), and the first exhaust hole portion (2513h) to provide the drug. The chemical solution (DS), which is exhausted to the outside of the injection device (2) and has a lowered gas (G) saturation, does not pass through the filter unit (2600) of the main body unit (2100) and is discharged through the injection hole unit (2110). It can prevent the injection of chemical solution (DS) with high gas (G) saturation into the body.

Hereinafter, the drug injection device 3 according to the third embodiment of the present invention will be described.

Figure 15 is a perspective view of a drug injection device according to a third embodiment of the present invention. Figure 16 is a cross-sectional view taken along line VI-VI' in Figure 15. Figure 17 is an enlarged view of part C of Figure 16. FIGS. 18A, 18B, 19A, and 19B are diagrams for explaining the use state of the drug injection device 3 according to the third embodiment of the present invention. Figure 20 is an exploded view to explain the combined state of the receiving body 3110, the first plunger 3300, and the second plunger 3400 of the drug injection device 3 according to the third embodiment of the present invention.

Referring to Figures 15 and 16, the drug injection device 3 according to the third embodiment of the present invention may include a main body portion 3100, a plunger portion 3200, and a filter portion 3500.

The main body 3100 may form a first space (S1) that can accommodate the first material (M1) and a second space (S2) that can accommodate the second material (M2) and is distinguished from the first space (S1). You can.

Referring to FIG. 16, the main body 3100 includes a receiving body 3110, a first partition 3120, a second partition 3130, a third partition 3140, a first needle 3150, and a first partition 3150. 1 May include an elastic member 3160.

The receiving body 3110 forms the exterior of the main body 3100, and has an injection hole 3110h through which the chemical solution (DS) is discharged at one end, and a plunger 3200 at the other end different from the one end. It may be formed by forming a hollow tube in which a hole (reference symbol not specified) into which is inserted is formed.

The first partition 3120, the second partition 3130, and the third partition 3140 each make surface contact with the inner peripheral surface of the receiving body 3110, and can partition the internal space of the receiving body 3110. there is.

The first to third partitions 3140 may be formed of an elastic material, but are not limited thereto, and may be formed of various materials through which the first material M1 and the second material M2 cannot penetrate. .

Hereinafter, the 'first space (S1)' may be interpreted as a space formed by the inner peripheral surface of the first partition 3120, the third partition 3140, and the receiving body 3110, and the 'second space S2 )' can be interpreted as the space formed by the inner peripheral surface of the first partition 3120, the head part 3420, and the receiving body 3110.

Referring to FIGS. 16 and 17, the first partition 3120 divides the first space S1 and the second space S2, and is movable in surface contact with the inner peripheral surface of the receiving body 3110. And a communication passage connecting the first space (S1) and the second space (S2) may be formed.

A groove may be formed along the circumferential direction on the outer peripheral surface of the first partition 3120, and the outer peripheral surface of the first partition 3120 where the groove is formed may be spaced apart from the inner peripheral surface of the receiving body 3110.

As a result, the contact area between the inner peripheral surfaces of the first partition 3120 and the receiving body 3110 can be reduced to reduce the friction between the first partition 3120 and the receiving body 3110, so the first partition 3120 ) partitions the first space (S1) and the second space (S2) and at the same time has the effect of being able to move smoothly in the relationship between the first partition (3120) and the receiving body (3110).

Referring to FIG. 17, the first partition 3120 is connected to the partition body 3121, which is in contact with the receiving body 3110, and is connected to the partition body 3121 and is comprised of the first material (M1) and the second material (M2). It may include a flow path body 3122 and a film portion 3125 that provide a movement path.

The compartment body 3121 is made of an elastic material and may be formed in a cylindrical shape with the outer peripheral surface in surface contact with the inner peripheral surface of the receiving body 3110.

The compartment body 3121 may share a longitudinal central axis with the receiving body 3110.

A first through-hole portion 3121h penetrating the division body 3121 may be formed on one side of the division body 3121. Specifically, the first through-hole portion 3121h may share a longitudinal central axis with the communication passage 3122h, which will be described later, and the first through-hole portion 3121h may follow the movement path of the second needle 3340, which will be described later. can be formed.

One side of the compartment main body 3121 facing the plunger portion 3200 may be in surface contact with the flow path main body 3122, and one side of the flow path main body 3122 may be inserted into the first through-hole portion 3121h.

The flow path body 3122 is formed by a communication flow path 3122h that communicates the first space S1 and the second space S2, and is inserted into one side of the partition main body 3121 and is integrated with the partition main body 3121. It can operate as .

Referring to FIG. 20, the flow passage body 3122 may be formed in the shape of a plate in surface contact with one side of the partition body 3121, and a protrusion (reference sign not set) forming the appearance of the communication passage 3122h on one side ) can be formed.

The protrusion may be formed to protrude from one surface of the flow path body 3122 along the longitudinal central axis of the second needle 3340.

The protrusion may be inserted into the first through-hole portion 3121h, and the protrusion on which the communication passage 3122h is formed may be inserted into the first through-hole portion 3121h communicating with the first space S1 and the second space S2. By being inserted. The communication passage 3122h may communicate with the first space S1 and the second space S2.

The outer diameter of the protrusion may be the same as or be relatively larger than the inner diameter of the first through-hole portion 3121h. As a result, the protrusion of the flow path body 3122 is inserted into the first through-hole portion 3121h of the partition body 3121, which can be formed of an elastic material, in an interference fit manner, so that the partition body 3121 and the flow path body 3122 are separated. Can be firmly combined.

The flow path body 3122 may be made of a non-elastic material. As a result, even if the flow path body 3122 is inserted into the partition body 3121 that may be made of an elastic material, the communication path 3122h formed in the flow path body 3122 The diameter of can be maintained to provide a movement path for the first material (M1) and the second material (M2).

The communication passage 3122h may share a longitudinal central axis with the second needle 3340.

The communication passage 3122h may share a longitudinal central axis with the receiving body 3110.

On one side of the channel body 3122 facing the plunger part 3200, a film seating part 3123 may be formed in the shape of a groove so that the film part 3125, which will be described later, can be seated. As a result, the film portion 3125 is seated in surface contact with the film mounting portion 3123, thereby selectively dividing the first space S1 and the second space S2.

The film portion 3125 is in surface contact with one surface of the compartment main body 3121 facing the plunger portion 3200 and can cover one opening of the communication passage 3122h.

Specifically, the film portion 3125 is in surface contact with one surface of the compartment main body 3121 and can cover the opening of the communication passage 3122h formed on one surface of the compartment main body 3121. As a result, the film portion 3125 covers one opening of the communication passage 3122h and makes surface contact with one surface of the compartment body 3121, so that the first space S1 and the second space S2 form the communication passage 3122h. Communication can be selectively restricted through .

The film portion 3125 is not limited to materials such as paper, plastic, and silicon, and may be made of various materials in the spirit of allowing easy penetration by the second needle 3340. As a result, the second needle 3340 advances and perforates the film portion 3125, thereby allowing the first material M1 and the second material M2 to be mixed through the communication passage 3122h.

The film portion 3125 may be formed of a material that cannot transmit liquid. As a result, mixing of the first material M1 and the second material M2 before the film portion 3125 is pierced by the second needle 3340 can be limited.

Referring to FIG. 16, the second partition 3130 may be in surface contact with the inner surface of the receiving body 3110 where the injection hole 3110h is formed.

The second partition 3130 may selectively allow the first space S1 and the external space of the drug injection device 3 to communicate through the first needle 3150.

The second partition 3130 may selectively communicate with the internal space of the main body 3100, specifically the first space S1, and the injection hole 3110h, depending on the position of the first needle 3150.

Referring to FIGS. 18A and 18B, no separate hole portion is formed in the second partition portion 3130, and may be formed of an elastic member that partitions the inner space of the injection hole portion 3110h and the main body portion 3100.

Referring to FIG. 19A, when the third partition 3140 to which the first needle 3150 is connected advances toward the second partition 3130, the first needle 3150 moves the second partition 3130. It can penetrate into the injection hole 3110h, and the internal space of the main body 3100 and the injection hole 3110h can communicate through the first needle 3150 that penetrates the second partition 3130. .

As a result, the second partition 3130 selectively selects the hole through which the internal space of the main body 3100, specifically the first space S1, communicates with the injection hole 3110h, depending on the position of the first needle 3150. Since it can be formed, it is possible to prevent the first material (M1) from being discharged to the outside before the first material (M1) and the second material (M2) are mixed.

Referring to FIG. 16, the third partition 3140 forms a first space S1 together with the first partition 3120 and the inner peripheral surface of the receiving body 3110, and the third partition 3140 The outer peripheral surface of can be moved while making surface contact with the inner peripheral surface of the receiving body (3110).

The third partition 3140 is made of an elastic material and may be formed in a cylindrical shape with the outer peripheral surface in surface contact with the inner peripheral surface of the receiving body 3110.

The third partition 3140 may share a longitudinal central axis with the receiving body 3110.

A groove may be formed along the circumferential direction on the outer peripheral surface of the third partition 3140, and the outer peripheral surface of the third partition 3140 where the groove is formed may be spaced apart from the inner peripheral surface of the receiving body 3110.

As a result, the contact area between the inner peripheral surfaces of the third partition 3140 and the receiving body 3110 can be reduced to reduce the friction between the third partition 3140 and the receiving body 3110, so the third partition 3140 ) can easily move along the longitudinal direction of the receiving body 3110 while making surface contact with the inner peripheral surface of the receiving body 3110.

The third partition 3140 may be formed with a hole penetrating the receiving body 3110 in a direction parallel to the longitudinal central axis, and may be inserted into the hole portion.

In one embodiment, the hole portion penetrating the third partition 3140 in one direction (X-axis direction based on FIG. 16) may communicate with the first needle 3150 and the first space S1, respectively.

Specifically, the hole penetrating the third compartment 3140 may be in communication with the first space S1, and as the third compartment 3140 advances, one end of the first needle 3150 is inserted into the hole. By passing through the additional second compartment 3130 and the injection hole 3110h, the first space S1 will be in communication with the external space of the drug injection device 3 through the hole and the first needle 3150. You can.

The first needle 3150 communicates the internal space and external space of the main body 3100, and may be formed in a needle shape with one end having a tip shape and a hollow interior.

One end of the first needle 3150 may be inserted into a hole formed in the third partition 3140, and the other end opposite to the one end may be inserted into the second partition 3130. Specifically, one end of the first needle 3150 may be inserted in a fixed position into the hole formed in the third partition 3140, and the first needle 3150 may be moved integrally with the third partition 3140. there is.

As a result, when the third partition 3140 moves toward the second partition 3130, the other end of the first needle 3150, which is fixed in position to the third partition 3140, is moved to the second partition 3130. By passing through 3130 and being exposed to the external space of the drug injection device 3, the drug solution DS accommodated inside the main body 3100 may be discharged to the outside through the first needle 3150.

Referring to FIG. 16, the first elastic member 3160 is disposed between the second partition 3130 and the third partition 3140, and one side and the first elastic member 3130 of the second partition 3130 face each other. Each can be fixed to one side of the three partitions 3140.

In one embodiment, the first elastic member 3160 may be a spring, but is not limited thereto, and the first elastic member 3160 is connected to the second partition 3130 and the third partition 3140, respectively. The second compartment 3130 and the third compartment 3140 may be comprised of various devices within a technical scope that can provide manpower to each other.

In one embodiment, the first elastic member 3160 may be connected to the second partition 3130 and the third partition 3140 in an extended state, respectively. Because of this, the first elastic member 3160 can apply an elastic restoring force to the third partition 3140 in the direction toward the second partition 3130.

The first elastic member 3160 may apply force to the third partition 3140 in the direction toward the injection hole 3110h.

In order for the third partition 3140 to move in the direction of the second partition 3130, a force greater than the friction force generated between the third partition 3140 and the receiving body 3110 and the first needle 3150 are used. Force is required to break through this second compartment 3130.

Therefore, in order to advance the third compartment 3140, the user must apply a large force to the plunger unit 3200, but in the case of a patient with weak strength, it may be difficult to apply the required force to the plunger unit 3200. It can happen.

The first elastic member 3160 provides an attractive force between the second partition 3130 and the third partition 3140 using elastic force, etc., so that the third partition 3140 is connected to the second partition 3130. It enables smooth movement in the lateral direction, and through this, the user can penetrate the second partition 3130 with the first needle 3150 with only a small amount of force.

16 and 18A to 19B, the plunger portion 3200 according to the third embodiment of the present invention is inserted into one side of the main body 3100 and is movable in a preset section, and is the first plunger. (3300) and may include a second plunger (3400).

The first plunger 3300 may include a first rod portion 3310, a switch portion 3320, a second elastic member 3330, and a second needle 3340.

The first rod portion 3310 may be formed in the shape of a shaft that is movably disposed while its outer circumferential surface is in surface contact with the inner circumferential surface of the second rod portion 3410, which will be described later.

A second needle 3340 may be connected to one side of the first rod part 3310 facing the first partition part 3120 in a fixed position. Specifically, a second needle 3340 sharing a longitudinal central axis with the communication passage 3122h may be fixed to one surface of the first rod portion 3310 facing the first partition 3120.

The second needle 3340 may penetrate the second through-hole portion 3413 formed in the second rod portion 3410 and the third through-hole portion 3422 formed in the head portion 3420, respectively, and may penetrate the first rod portion 3410. As the part 3310 moves toward the first partition 3120, the second needle 3340 can penetrate the film part 3125 while sliding with the inner peripheral surface of the second and third through-

hole parts

3413 and 3422. .

A stepped portion 3311 may be formed on the outer peripheral surface of the first rod portion 3310. Specifically, the diameter of one side of the first rod portion 3310 adjacent to the first partition 3120 is relatively smaller than the diameter of one side of the first rod portion 3310 that is relatively distant from the first partition 3120. A stepped portion 3311 may be formed on the outer peripheral surface of the first rod portion 3310 due to the difference in diameter.

One side of the second elastic member 3330 may contact the step portion 3311, and the second elastic member 3330 may apply force to the step portion 3311. A detailed explanation regarding this is given in the description of the second elastic member 3330.

A switch unit 3320 may be connected to one end of the first load unit 3310. One side of the switch unit 3320 may be connected to one end of the first rod unit 3310, and the other side opposite to the one side may protrude to the outside of the second rod unit 3410.

Due to this, the user can advance the first rod unit 3310 by pressing the switch unit 3320, and as the first rod unit 3310 advances, the second needle 3340 moves the film unit 3125. It can penetrate.

In an optional embodiment, the switch unit 3320 may be formed integrally with the first load unit 3310.

However, it is not limited to this, and the switch unit 3320 is connected to the first rod unit 3310 inserted inside the second rod unit 3410, and one side protrudes outward from the second rod unit 3410. It can be formed into various shapes.

16, 18A, and 18B, one end of the second elastic member 3330 is connected to one inner surface of the second rod portion 3410 facing the first rod portion 3310, and the second elastic member The other end of 3330 may be connected to the first load portion 3310.

Specifically, the other end of the second elastic member 3330 may contact the step portion 3311 formed on the first rod portion 3310 to apply elastic force to the first rod portion 3310.

As a result, the first rod unit 3310, which has received force from the user, advances toward the first partition 3120 and the second needle 3340 penetrates the film unit 3125, and when the force is removed, compression occurs. Since the second elastic member 3330 can apply an elastic force to the first rod unit 3310 in a retreat direction different from the forward direction, the first rod unit 3310 and the second needle 3340 can be returned to their original positions. You can.

Through this, the second needle 3340 retreats from the communication passage 3122h after penetrating the film portion 3125, so that the communication passage 3122h is divided into the first space S1 and the second space (S1) without any other obstructions. The first material (M1) and the second material (M2) can be mixed by communicating S2).

As the first plunger 3300 advances toward the first partition 3120, it may include a second needle 3340 capable of penetrating the film portion 3125.

The second needle 3340 may share a central axis in the direction of the communication channel 3122h.

One end of the second needle 3340 may be connected to one surface of the first plunger 3300 adjacent to the first partition 3120, and the other end, which is different from the one end, may penetrate the second plunger 3400. .

In addition, as the first plunger 3300 advances in the direction of the first partition 3120, the second needle 3340 penetrates the second plunger 3400 and the film portion located in the second space S2 ( 3125).

A second through-hole portion 3413 may be formed at one end of the second plunger 3400 adjacent to the first partition 3120, and a third through-hole portion 3422 may be formed at the head portion 3420. The second through-hole portion 3413 and the third through-hole portion 3422 may share a longitudinal central axis. Specifically, the longitudinal central axis of the second through-hole portion 3413 and the third through-hole portion 3422 is a communication passage ( 3122h) may coincide with the longitudinal central axis.

The second needle 3340 can move while making surface contact with the inner peripheral surfaces of the second through-hole portion 3413 and the third through-hole portion 3422, and as the first plunger 3300 advances, the second needle 3340 It can pass through the second through-hole portion 3413 and the third through-hole portion 3422 to reach the area where the film portion 3125 is located.

The diameter of the second needle 3340 may be the same as the inner diameter of the communication passage 3122h or may be relatively small.

Referring to FIGS. 16 to 19B, the second plunger 3400 is inserted into one side of the receiving body 3110 and discharges the chemical solution DS while advancing in a preset direction, thereby discharging the second rod portion 3410. ), and may include a head portion 3420.

The outer peripheral surface of the second rod unit 3410 may be in surface contact with the inner peripheral surface of the receiving body 3110, and the inner peripheral surface of the second rod unit 3410 may be in surface contact with the outer peripheral surface of the first rod unit 3310.

Specifically, the second rod portion 3410 is inserted into one side of the receiving body 3110 and can advance and retreat in a preset direction, and the first rod portion 3310 is inserted into one side of the second rod portion 3410. Once inserted, it can advance and retreat in a preset direction.

One end of the second rod part 3410 adjacent to the first partition 3120 may be connected to the head part 3420.

Referring to FIG. 17, each of the head portion 3420 and the second rod portion 3410 is in surface contact with the outer peripheral surface of the receiving body 3110, and one surface of the head portion 3420 and the second rod portion 3410 face each other. One side of may be connected to each other in a fixed position.

Referring to FIGS. 17 and 20, a filter seating portion 3411 on which the filter portion 3500 can be seated may be formed in the shape of a groove on one surface of the second rod portion 3410 facing the head portion 3420. .

In one embodiment, the filter seating portion 3411 may be formed as a ring-shaped groove centered on the longitudinal central axis of the second through-hole portion 3413.

17 and 20, on one inner surface of the filter seating portion 3411 facing the head portion 3420, there is at least one device that communicates with the inner space of the plunger portion 3200 or the outer space of the drug injection device 3. The above first exhaust hole portion 3412 may be formed.

The first exhaust hole 3412 may provide an exhaust path to the outside of the first space S1 and the second space S2 included in the chemical solution DS.

The chemical solution (DS) accommodated in the main body portion 3100 may pass through the head portion 3420 through the second exhaust hole portion 3421, which will be described later, and the chemical solution (DS) passing through the head portion 3420 may be filtered. It flows to the filter seating part 3411 where the part 3500 is seated. The filter unit 3500 can selectively transmit only gas (G), and the liquid chemical solution (DS) cannot pass through the filter unit 3500 and is not discharged into the first exhaust hole 3412. ) can only pass through the filter unit 3500 and be discharged into the first exhaust hole unit 3412.

A plurality of first exhaust hole portions 3412 may be formed at a preset angle with respect to the longitudinal central axis of the second through-hole portion 3413.

One inner surface of the filter seating portion 3411 where the first exhaust hole portion 3412 is formed, the inner peripheral surface of the filter seating portion 3411, and one surface of the head portion 3420 facing the second rod portion 3410 are filter portions ( 3500) can form a space in which the gas (G) is seated, and the second exhaust hole portion (3421) provides an inflow path for the gas (G) into the filter portion (3500), and the first exhaust hole portion (3412) provides a space for the gas (G) to flow into the filter portion (3500). A discharge path from the filter unit 3500 is provided.

A second through-hole portion 3413 may be formed on one surface of the second rod portion 3410 facing the head portion 3420. The second through-hole portion 3413 is located at least one of the longitudinal central axis of the communication passage 3122h, the longitudinal central axis of the second needle 3340, and the longitudinal central axis of the third through-hole portion 3422. Axes can be shared.

The inner peripheral surface of the second through-hole portion 3413 may be in surface contact with the outer peripheral surface of the second needle 3340, and the second through-hole portion 3413 may provide a movement path for the second needle 3340.

The head portion 3420 is connected to the end of the second rod portion 3410, and the outer peripheral surface of the head portion 3420 may be in surface contact with the inner peripheral surface of the receiving body 3110.

When the second rod unit 3410 moves forward, the head unit 3420 is connected to the second rod unit 3410 and can advance in the same direction, and as the head unit 3420 advances, the first space S1 and at least one of the second space S2 may be reduced.

A second exhaust hole portion 3421 may be formed in the head portion 3420. Specifically, the second exhaust hole portion 3421 communicates with the second space S2 and the area where the second rod portion 3410 is located. You can.

The second exhaust hole portion 3421 may communicate with the filter seating portion 3411, and through this, the second exhaust hole portion 3421 may communicate with the first exhaust hole portion 3412. The gas (G) located inside the receiving body 3110 sequentially passes through the second exhaust hole portion 3421, the filter portion 3500, and the first exhaust hole portion 3412 and is discharged to the outside of the drug injection device 3. It can be.

Referring to FIG. 20, a third through-hole portion 3422 may be formed in the head portion 3420. The third through-hole portion 3422 is located at least one of the longitudinal central axis of the communication passage 3122h, the longitudinal central axis of the second needle 3340, and the longitudinal central axis of the second through-hole portion 3413. Axes can be shared.

The inner peripheral surface of the third through-hole portion 3422 may be in surface contact with the outer peripheral surface of the second needle 3340, and the third through-hole portion 3422 moves the second needle 3340 together with the second through-hole portion 3413. A route can be provided.

Referring to FIG. 20, the filter unit 3500 is seated on the filter seating unit 3411 and can selectively discharge the gas G contained in the chemical solution DS.

The shape of the filter unit 3500 may be formed to correspond to the shape of the filter seating unit 3411. Specifically, the filter unit 3500 may be formed in a ring shape corresponding to the shape of the filter seating unit 3411.

The filter unit 3500 includes a polycarbonate membrane filter, a nylon membrane filter, a polysulfone membrane filter, a polyvinylidene fluoride membrane filter, and cellulose. It can be made of various filters that can selectively transmit gas (G), such as an acetate membrane filter (cellulose acetate membrane filter) and polytetrafluoroethylene membrane filter (polytetrafluoroethylene membrane filter).

Hereinafter, the operating principle and effects of the drug injection device 3 according to the third embodiment of the present invention will be described.

The drug injection device 3 according to the third embodiment of the present invention has a first space (S1) formed in the inner space of the main body 3100 as the first plunger 3300 moves and penetrates the film portion 3125. ) and the second space (S2) are selectively communicated, so that the first material (M1) and the second material (M2) accommodated in the first space (S1) and the second space (S2) are mixed with each other. It's about.

Referring to FIGS. 16, 17, 18A, and 18B, the inner peripheral surface of the main body 3100, the first partition 3120, and the third partition 3140 are configured to accommodate the first material M1, such as an aqueous solution. A first space (S1) may be formed, and the inner peripheral surface of the receiving portion, the first partition portion (3120), and the head portion (3420) may form a second space (S2) in which the second material (M2) is accommodated. .

A first partition 3120 is disposed between the first space S1 and the second space S2, and the communication passage 3122h formed in the flow path body 3122 of the first partition 3120 is the first partition 3120. The space (S1) and the second space (S2) can be selectively communicated.

The film portion 3125 may cover one opening of the communication passage 3122h and make surface contact with one surface of the passage main body 3122. As a result, until the second needle 3340 penetrates the film portion 3125, the film portion 3125 restricts the first material (M1) and the second material (M2) from flowing through the communication passage (3122h). can do.

Referring to FIG. 18A, the user may apply force to the switch unit 3320 to advance the first rod unit 3310 toward the first partition unit 3120.

When the first rod unit 3310 receives the force and transmits it to the first partition 3120, the second needle 3340 connected to the end of the first rod unit 3310 is the second plunger 3400. After passing through and reaching the second space (S2), it may pass through the film portion 3125.

Specifically, the second needle 3340 connected to the end of the first rod portion 3310 includes the second through-hole portion 3413 of the second rod portion 3410 and the third through-hole portion 3422 of the head portion 3420. ) can advance by sequentially passing through, and the second needle 3340 passes through the second space S2 and penetrates one side of the film portion 3125 corresponding to the communication passage 3122h to the communication passage 3122h. can be inserted.

16 and 18B, the second elastic member 3330 disposed between the second rod portion 3410 and the first rod portion 3310 applies force to the first rod portion 3310 in the retreat direction. This is possible, and as a result, the second needle 3340 moves to the original position together with the first rod unit 3310.

As a result, one side of the film portion 3125 corresponding to the communication passage 3122h is perforated by the second needle 3340, and the first space S1 and the second space S2 are formed through the communication passage 3122h. They may communicate, and through this, the first material (M1) accommodated in the first space (S1) and the second material (M2) accommodated in the second space (S2) are allowed to mix with each other.

After the film portion 3125 is pierced by the second needle 3340, the first material M1 and the second material M2 are mixed through the communication passage 3122h to generate the chemical solution DS. , the chemical solution DS may be accommodated in the first space S1 and the second space S2 of the receiving body 3110.

Referring to FIG. 18B, the user can apply force to the second rod portion 3410 to advance the second rod portion 3410, and the second rod portion 3410 that receives the force is the head portion 3420. It advances toward the first partition 3120.

As the head part 3420 advances toward the first partition 3120, the size of the second space S2 formed by the inner peripheral surface of the first partition 3120, the head part 3420, and the receiving body 3110 increases. It is reduced, and the chemical solution DS accommodated in the second space S2 can move to the first space S1 through the communication passage 3122h.

As the chemical solution DS in the second space S2 flows into the first space S1, the pressure of the first space S1 increases. As a result, the third compartment 3140 and the first needle 3150 connected to the third compartment 3140 may move toward the second compartment 3130 due to the pressure.

The first needle 3150 moves toward the second partition 3130 and penetrates the second partition 3130. As a result, the first needle 3150 passes through the first space S1 and the injection hole 3110h. can communicate. As a result, the chemical solution DS accommodated in the first space S1 may be discharged to the outside through the first needle 3150.

Referring to FIGS. 19A and 19B, as the second rod unit 3410 continues to advance, one surface of the head unit 3420 and one surface of the first partition 3120 come into contact with each other and are accommodated in the second space S2. All of the chemical solution DS moves to the first space S1.

Thereafter, as the second load part 3410 continues to advance, the head part 3420 and the first partition 3120 move forward together with the second load part 3410, and the first partition 3120 , As the size of the first space (S1) formed by the third partition (3140) on the inner peripheral surface of the receiving body (3110) gradually decreases, the chemical solution (DS) accommodated in the first space (S1) is transferred to the first needle ( 3150) and is discharged to the outside.

Referring to FIGS. 17, 19A, 19B, and 20, as the second rod portion 3410 moves forward, the chemical solution DS accommodated in the receiving body 3110 flows into the second rod portion 3420 formed in the head portion 3420. It can flow through the exhaust hole portion 3421.

The second exhaust hole portion 3421 communicates with the filter seating portion 3411 and the first exhaust hole portion 3412, and the chemical solution (DS) passing through the second exhaust hole portion 3421 is seated on the filter seating portion 3411. Movement may be restricted by the filter unit 3500.

In this case, since only the gas (G) included in the chemical solution (DS) can pass through the filter unit 3500, only the gas (G) can pass through the filter unit 3500 and be exhausted through the first exhaust hole unit 3412. In addition, the chemical solution DS in a liquid state may not pass through the filter unit 3500 and may remain in the inner space of the receiving body 3110 and be discharged through the injection hole.

As a result, the gas (G) saturation of the chemical solution (DS) injected into the user's body can be lowered, thereby preventing side effects that occur as the gas (G) is injected into the user's body together with the chemical solution (DS).

The spirit of the present invention should not be limited to the above-described embodiments, and the scope of the claims described below, as well as all scopes equivalent to or equivalently changed from the claims, are within the scope of the spirit of the present invention. It will be said that it belongs.

According to the present invention, a chemical liquid injection device is provided. Additionally, embodiments of the present invention can be applied to industrial devices that inject medicinal solutions into a patient's body.

Claims

a main body in which a first space capable of accommodating a first material and a second space capable of accommodating a second material and distinguished from the first space are formed;

a plunger portion inserted into one side of the main body and movable in a preset section; and

It includes a filter unit disposed on a path that communicates the internal space of the main body with the external space, and selectively discharges gas contained in at least one of the first material and the second material,

A drug injection device, wherein as the plunger part moves, the first space and the second space are selectively communicated.
According to paragraph 1,

The main body part,

An opening is formed on one side and a receiving body formed in the shape of a hollow tube; and

A drug injection device comprising: a partition portion that is movable while in surface contact with the inner peripheral surface of the receiving body and selectively partitions the first space and the second space.
According to paragraph 2,

A drug injection device, characterized in that a bypass part is formed on the inner peripheral surface of the receiving body, extending along the longitudinal direction of the receiving body and having the shape of a groove.
According to paragraph 3,

A drug injection device, wherein the bypass portion is formed to be relatively longer than the length of the partition portion extending along the longitudinal direction of the receiving body.
According to paragraph 2,

Drug injection, characterized in that it further comprises an injection unit connected to the receiving body and the filter unit, respectively, and providing an discharge path for at least one of the first material and the second material accommodated in the receiving body. Device.
According to clause 5,

An injection hole communicating with the internal space of the main body is formed on one side of the injection unit, and an exhaust hole communicating with the internal space of the main body and the injection hole is formed on the other side opposite to the one side, respectively,

A drug injection device, characterized in that one surface of the injection unit where the exhaust hole is formed is in surface contact with the filter unit.
According to paragraph 1,

A drug injection device, characterized in that it further comprises a receiving portion that is hollow on the inside and is movable while making surface contact with the circumference of the inner peripheral surface of the main body portion.
In clause 7,

The plunger part,

a first plunger located inside the main body and selectively communicating with the internal space of the main body as it advances toward the accommodating part; and

A second plunger that discharges the first material and the second material accommodated in the inner space of the receiving portion and the inner space of the main body portion to the outside of the main body portion as it advances toward the receiving portion. A drug injection device.
According to clause 8,

The first plunger is,

a sliding body movable on the second plunger; and

A drug injection device comprising: a compartment connected to the sliding body and capable of selectively making surface contact with the inner peripheral surface of the receiving portion as the sliding body moves.
According to clause 8,

The second plunger is a drug injection device characterized in that a rail portion is formed in the longitudinal direction of the main body portion to provide a movement path for the first plunger.
According to clause 8,

The second plunger,

A drug injection device, wherein a filter seating portion on which the filter portion can be seated is formed in the shape of a groove at one end adjacent to the receiving portion.
According to paragraph 1,

The main body part,

An opening is formed on one side and the receiving body is hollow on the inside; and

A drug injection device comprising: a first compartment that is movable and in surface contact with the inner peripheral surface of the receiving body, and in which a communication passage connecting the first space and the second space is formed.
According to clause 12,

The first compartment,

a compartment main body in surface contact with the inner peripheral surface of the main body portion and disposed between the first space and the second space; and

A drug injection device comprising a film portion in surface contact with one surface of the compartment main body facing the plunger portion.
According to clause 12,

The plunger part,

A first plunger including a needle capable of penetrating the film portion as it advances toward the first compartment,

The drug injection device is characterized in that the needle shares a longitudinal central axis with the communication passage.