Chemical injection device

Abstract

A drug solution injection device according to an embodiment of the present disclosure includes a chamber configured to store a drug solution therein; a piston configured to be slidable in the chamber in a predetermined pressurizing direction to pressurize the drug solution stored in the chamber; and a pressurizing operation unit configured to increase the pressure of a gas in a pressurized space formed in a direction opposite to the pressurizing direction of the piston to pressurize the piston, wherein the pressurizing operation unit includes: a receptacle for containing a liquid substance and a solid substance that generates gas when in contact with the liquid substance; a partition portion disposed between the liquid substance and the solid substance and separating the liquid substance from the solid substance; a rotating unit rotatably connected to the receptacle; and a pressurizing unit configured to be pressurized and move in a first direction approaching the receptacle as the rotating unit rotates, and to pressurize the receptacle by moving in the first direction to release the isolation of the partition portion.

Description

[Technical field]

[0001] The present disclosure relates to a chemical fluid injector. [Background technology]

[0002] A liquid medicine injection device is known that injects a liquid medicine into a patient to supply the medicine to the patient. By using the liquid medicine injection device, the liquid medicine in a predetermined storage space flows into the patient's body through a passage connected to the patient (for example, the inner space of a tube and a syringe needle).

[0003] A conventional liquid medicine injection device includes a chamber in which a liquid medicine can be stored and a piston that pressurizes the liquid medicine stored in the chamber. A gas-generating liquid medicine injection device that uses gas pressure to pressurize and move the piston is known. In the gas-generating liquid medicine injection device, the injection piston in the cylinder is stably and gradually moved forward by the generated high gas pressure, and the liquid medicine filled in the liquid medicine storage space in the chamber is stably and continuously injected into the patient at a constant flow rate by the forward movement of the injection piston.

[0004] A gas-generating liquid medicine injection device generates a gas (e.g., carbon dioxide) by reacting a liquid substance such as citric acid with a solid substance such as sodium bicarbonate, and uses the pressure of the gas thus generated to advance a piston and inject the liquid medicine.

[0005] In the gas generating type liquid injection device, the liquid material and the solid material for generating gas are separated from each other by a partition, and the generation of gas is prevented before use. When the user needs to use the liquid injection device, the liquid material and the solid material can be brought into contact with each other by releasing the separation of the partition.

[0006] A gas-generating liquid injection device is known in which a user directly pressurizes a specific portion of a receptacle in which a solid substance and a liquid substance are contained, using his or her hands, in order to release a partition that separates the liquid substance and the solid substance. Summary of the Invention [Problem to be solved by the invention]

[0007] An embodiment of the present disclosure provides a medical fluid injection device with a rotary release structure.

[0008] Conventional liquid injection devices that are configured to release the septum by directly applying pressure by the user have a problem in that the liquid injection device is difficult to use when the user is in an inappropriate situation for applying a certain amount of force (for example, when the user is a sick patient with insufficient strength). The embodiment of the present disclosure solves such a problem of the conventional technology.

[0009] In a conventional drug solution injector, when a user directly applies pressure to release the partition, the user must apply a certain amount of force, which is inconvenient, and there is a problem that the user may mistakenly believe that the partition has been released, even if the user is unable to apply a certain amount of force and the partition is not released. The embodiment of the present disclosure has a structure that can more easily and reliably release the isolation of the partition, thereby solving the above-mentioned problems. [Means for solving the problem]

[0010] One aspect of the present disclosure provides an embodiment of a liquid medicine injection device. The liquid medicine injection device according to a representative embodiment includes a chamber configured to store a liquid medicine therein; a piston configured to be slidable in the chamber in a predetermined pressurizing direction to pressurize the liquid medicine stored in the chamber; and a pressurizing operation unit configured to increase the pressure of a gas in a pressurized space formed in a direction opposite to the pressurizing direction of the piston to pressurize the piston; the pressurizing operation unit includes a receptacle for storing a liquid material and a solid material that generates a gas when contacted with the liquid material; a partition wall portion disposed between the liquid material and the solid material and separating the liquid material from the solid material; a rotating unit rotatably coupled to the receptacle; and a pressurizing unit configured to be pressurized and move in a first direction approaching the receptacle as the rotating unit rotates, and to pressurize the receptacle and release the separation of the partition wall portion by moving in the first direction.

[0011] In one embodiment, an axis of rotation of the rotating part relative to the receptacle may be parallel to the first direction.

[0012] In one embodiment, the rotating part may include at least one guide part including a first inclined surface whose height in a first direction decreases along a first rotation direction of the rotating part, and when the rotating part rotates in the first rotation direction, the pressure part may be configured to move in the first direction by sliding along the first inclined surface of the guide part.

[0013] In one embodiment, the at least one guide portion may further include a second inclined surface that decreases in height in the first direction along a second rotation direction that is opposite to the first rotation direction of the rotating portion, and when the rotating portion rotates in the second rotation direction, the pressure portion may be configured to move in the first direction by sliding along the second inclined surface of the guide portion.

[0014] In one embodiment, the pressure applying portion may include a plate portion arranged inside the rotating portion and configured to be able to apply pressure to the receptacle; and at least one protrusion portion contacting the guide portion and extending outward from the plate portion.

[0015] In one embodiment, the at least one guide portion may include a plurality of guide portions arranged along the rotational direction of the rotating portion, and the at least one protrusion portion may include a plurality of protrusion portions arranged along the periphery of the plate portion so as to contact the plurality of guide portions, respectively.

[0016] In one embodiment, the receptacle includes an insertion groove into which the protrusion is inserted, and the insertion groove may be extended in the first direction to guide movement of the protrusion in the first direction and limit lateral movement across the first direction.

[0017] In one embodiment, the pressure applying portion may include a protrusion that protrudes convexly in the first direction and is configured to apply pressure to a predetermined portion of the receptacle.

[0018] In one embodiment, the receptacle includes a liquid containing portion for containing the liquid substance; and a solid containing portion having an opening open in a direction looking toward the liquid containing portion, for containing the solid substance, and in which the specified portion is located, and the partition portion can isolate the liquid substance and the solid substance by closing the opening in a closed position. Effect of the Invention

[0019] According to the embodiment of the present disclosure, the user can rotate the rotating portion to more easily and reliably release the isolation of the partition portion.

[0020] According to the embodiment of the present disclosure, even if the user is a weak patient or the like who has insufficient strength, the liquid injector can be easily used by releasing the barrier without difficulty.

[0021] According to an embodiment of the present disclosure, the partition can be released regardless of the rotation direction of the rotating part, which increases the convenience of the user when using the liquid injector and allows the user to use the liquid injector more efficiently. [Brief description of the drawings]

[0022] FIG. 1 is a perspective view of a liquid injector according to one embodiment.

[0023] FIG. 2 is a cross-sectional view of the liquid injector shown in FIG. 1 taken along the line AA'.

[0024] FIG. 3 is a perspective view of the AA' cross section of the liquid injector shown in FIG.

[0025] FIG. 4 is an exploded perspective view of the liquid injector shown in FIG.

[0026] FIG. 5 is an enlarged view of a liquid medicine inlet portion in the liquid medicine injector shown in FIG.

[0027] FIG. 6 is a partially cut-away perspective view of the drug solution inlet portion shown in FIG. 5 with the cap portion and the base portion separated from each other.

[0028] FIG. 7 is an enlarged view of a part including a liquid inlet portion in the liquid injector shown in FIG.

[0029] FIG. 8 is a view showing a part including the drug solution inlet when the packing part in FIG. 7 is elastically deformed by pressure applied from the outside.

[0030] FIG. 9 is an elevational view of the drug solution inlet and the hydrophobic filter shown in FIG. 2 as viewed in the directions of arrows B and B'.

[0031] FIG. 10 is a view of FIG. 9 without the hydrophobic filter.

[0032] FIG. 11 is an exploded perspective view of the hydrophobic filter shown in FIG.

[0033] FIG. 12 is a cross-sectional view of the hydrophobic filter shown in FIG. 11 in a horizontal direction perpendicular to the lamination direction of the first and second hydrophobic filter layers.

[0034] FIG. 13 is an enlarged view of the pressurizing section in the liquid injector shown in FIG.

[0035] FIG. 14 is a cross-sectional view of the pressure action part shown in FIG. 13 taken along the line CC'.

[0036] FIG. 15 is a diagram showing the configuration of FIG. 14 with the multiple pressurizing unit filters removed.

[0037] 16 is a perspective view of the pressurizing unit filter shown in FIG. 14. FIG.

[0038] FIG. 17 is a perspective view of one embodiment of the pressure action unit shown in FIG.

[0039] FIG. 18 is a cross-sectional view of the pressure action part taken along the line DD' of FIG.

[0040] FIG. 19 is a perspective view of another embodiment of the pressure action unit shown in FIG.

[0041] FIG. 20 is a cross-sectional view of the pressure action part shown in FIG. 19 taken along the line EE'. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0042] The embodiments of the present disclosure are illustrated for the purpose of explaining the technical idea of ​​the present disclosure, and the scope of the rights of the present disclosure is not limited to the embodiments presented below or the specific descriptions related to these embodiments.

[0043] In the present disclosure, the term "embodiment" is an arbitrary category for easily explaining the technical idea of ​​the present disclosure, and each embodiment does not need to be mutually exclusive. For example, a configuration disclosed in one embodiment may be applied and embodied in another embodiment, and may be applied and embodied with modifications without departing from the scope of the present disclosure.

[0044] All technical and scientific terms used in this disclosure have the meanings commonly understood by those of ordinary skill in the art to which this disclosure belongs, unless otherwise defined. All terms used in this disclosure are selected for the purpose of more clearly describing this disclosure, and are not selected to limit the scope of the rights of this disclosure.

[0045] As used in this disclosure, terms such as "including," "comprising," "having," and the like, should be understood as open-ended terms that include the possibility of including other embodiments, unless otherwise stated in the phrase or sentence in which the term appears.

[0046] The singular terms used in this disclosure may include the plural meaning unless otherwise specified, and this also applies to the singular terms used in the claims.

[0047] The terms "first", "second", etc. used in this disclosure are used to distinguish multiple components from each other and do not limit the order or importance of the components.

[0048] Directional terms such as "upper" and "above" used in this disclosure refer to the direction in which the chamber (100) is disposed with reference to the pressurizing operation unit (300) with reference to FIG. 1, and directional terms such as "lower" and "below" refer to the opposite direction to the upper direction. Also, in this disclosure, "horizontal direction" refers to any one of the directions crossing the "up-down direction". This is merely a reference for explaining this disclosure so that it can be clearly understood, and it goes without saying that upper and lower can be defined differently depending on where the reference is placed.

[0049] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. In the accompanying drawings, identical or corresponding components are given the same reference numerals. In addition, in the following description of the embodiments, duplicated description of identical or corresponding components may be omitted. However, even if a description of a component is omitted, it is not intended that such a component is not included in a certain embodiment.

[0050] Fig. 1 is a perspective view of a liquid injector 10 according to an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along line A-A' of the liquid injector shown in Fig. 1, and Fig. 3 is a cross-sectional view taken along line A-A' of the liquid injector shown in Fig. 1.

[0051] The liquid medicine injector (10) may include a chamber (100), a piston (200), and a pressure action unit (300).

[0052] 1 to 3, the chamber (100) may include a chamber housing (101). The chamber housing (101) may be substantially cylindrical. A lubricant may be applied to the inner surface of the chamber housing (101). The chamber (100) may include a liquid medicine inlet (110) configured to allow a liquid medicine to flow into the chamber (100). The chamber (100) may include a liquid medicine injector (120) configured to allow the stored liquid medicine to be discharged. The liquid medicine discharged through the liquid medicine injector (120) may be injected into a patient through a connecting tube (not shown), a syringe needle (not shown) and / or a catheter (not shown). In this embodiment, the liquid medicine inlet (110) and the liquid medicine injector (120) are illustrated as separate separate components, but this is merely one embodiment, and the liquid medicine inlet (110) and the liquid medicine injector (120) may be configured as a single component. In other examples not shown, the chamber (100) may include a single component configured to allow the inflow and outflow of the medicinal liquid (i.e., a component that functions as both a medicinal liquid inflow section and a medicinal liquid injection section).

[0053] A liquid medicine storage space 105 is formed inside the chamber 100. The liquid medicine storage space 105 may be configured to store the liquid medicine that has flowed in through the liquid medicine inlet portion 110. The liquid medicine stored in the liquid medicine storage space 105 may be discharged through the liquid medicine inlet portion 120.

[0054] FIG. 4 is an exploded perspective view of the drug solution injection device (10) shown in FIG. 1. Referring to FIG. 4, the drug solution inlet (110) may include a cap part (111). The cap part (111) may be a part that contacts a drug solution inlet tool (e.g., a syringe) for injecting the drug solution into the chamber (100). The drug solution inlet (110) may include a packing part (112) made of a flexible material and having a drug solution inlet hole (1121) formed in the center. The flexible material used in the present disclosure is a material that can be elastically deformed when pressure is applied from the outside, and may be, for example, rubber, polymer, etc. The packing part (112) made of a flexible material may be bent or compressed when pressure is applied from the outside, and may be deformed by a predetermined size. The drug solution inlet hole (1121) may be configured to allow the drug solution to flow into the chamber (100) from the outside. The drug solution inlet portion (110) may include a base portion (113) coupled to the cap portion (111) via a packing portion (112). The cap portion (111), the packing portion (112), and the base portion (113) may be arranged in this order from top to bottom. The cap portion (111), the packing portion (112), and the base portion (113) may be coupled to each other to maintain an airtight state. The openable, closable gas passage in relation to the cap portion (111), the packing portion (112), and the base portion (113) constituting the drug solution inlet portion (110) will be described below with reference to FIGS. 5 to 8.

[0055] The liquid injector (10) may include a hydrophobic filter (20) that is configured to be impermeable to liquids but permeable to gases. The hydrophobic filter (20) is disposed in a predetermined passage and can allow gases to pass through the predetermined passage but not liquids. The hydrophobic filter (20) will be described later with reference to Figures 9 to 12.

[0056] 2 and 3, the piston (200) may be configured to pressurize the medicinal liquid stored in the chamber (100). The piston (200) may be configured to be slidable so as to pressurize the medicinal liquid stored in the chamber (100). The piston (200) may move while maintaining an airtight state with the inner surface of the chamber housing (101). The piston (200) may partition a medicinal liquid storage space (105) into which the medicinal liquid flows in through the medicinal liquid inlet portion (110) and is filled, and a pressurization space (205) into which the pressure may increase as gas generated in the pressurization operation portion (300) is supplied.

[0057] The piston (200) includes a pressurizing surface facing the medicinal liquid storage space (105) of the chamber (100). The pressurizing surface can contact the medicinal liquid inside the chamber (100) and directly press the medicinal liquid. The piston (200) having the pressurizing surface can pressurize the medicinal liquid inside the chamber (100) by moving in a predetermined pressurizing direction (Ap1). Here, the pressurizing direction (Ap1) can be a direction approaching the medicinal liquid injector (120).

[0058] When the liquid medicine is being filled into the liquid medicine storage space (105) inside the chamber (100), the pressurizing surface moves in a direction (Ap2) opposite to the pressurizing direction (Ap1). Figures 2 and 3 show the piston (200') when it has moved a predetermined distance in the pressurizing direction (Ap1). However, the position of the piston (200) is not limited to the position shown in the drawings.

[0059] The piston (200) may include a first part (210) having the pressure surface, and a second part (220) coupled to the first part (210). The second part (220) may be coupled to the first part (210) below the first part (210). The second part (220) is configured to move integrally with the first part (210).

[0060] The pressure operating unit (300) may be configured to provide power so that the piston (200) moves in the pressure direction (Ap1). As an example not shown, the pressure operating unit (300) may provide a part that a user can grab, so that the piston (200) can be moved in the pressure direction (Ap1) by the force of the user. As another example not shown, the pressure operating unit (300) may be configured to pressurize the liquid using the elastic force of an elastic body such as a balloon. In this case, the pressure operating unit (300) may be configured so that the liquid in the balloon is pressurized.

[0061] Hereinafter, the pressurizing action unit (300) will be described based on an embodiment in which the pressurizing action unit (300) is configured to generate gas, but the present disclosure is not limited thereto.

[0062] In one embodiment, the pressurizing operation unit 300 may be configured to increase the pressure of the gas in the pressurized space 205 formed in a direction opposite to the pressurizing direction Ap1 of the piston 200. The pressurizing operation unit 300 may include a receptacle 310 that contains a liquid substance 7 and a solid substance 6 that generates gas when in contact with the liquid substance 7. The pressurizing operation unit 300 may include a partition 320 that separates the liquid substance 7 from the solid substance 6.

[0063] 2 to 4, the receptacle (310) may include an extension (313) extending from the inside to the pressurized space (205). The extension (313) forms a hollow portion connected to the inside of the receptacle (310), but the hollow portion is blocked by a plug so as not to be connected to the pressurized space (205). The extension (313) may be formed in a substantially cylindrical shape. During the manufacture of the receptacle (310), the liquid substance (7) may pass through the extension (313) and move into the inside of the receptacle (310). After the liquid substance (7) passes through the extension (313) and is received inside the receptacle (310), the extension (313) may be blocked by a plug. The movement of the liquid substance (7) through the extension (313) may be blocked by the plug.

[0064] The receptacle (310) may include a boss (314) extending into the pressurized space (205). The boss (314) may be provided with a pressure control valve (315) for preventing the pressure of the gas from exceeding a preset pressure. When the pressure of the pressurized space (205) exceeds a preset pressure in order to prevent the medicinal liquid from being injected into the patient at a rate faster than a predetermined rate, the pressure control valve (315) connects the pressurized space (205) to the outside (e.g., atmosphere) and allows the gas in the pressurized space (205) to flow out. As a result, the pressure in the pressurized space (205) may be maintained constant.

[0065] The pressurizing operation unit (300) may be formed with an air vent hole (301) configured to allow gas moving from inside the receptacle (310) to the pressurized space (205) to pass through. The liquid injector (10) may include a pressurizing unit filter (30) arranged to allow gas moving to the pressurized space (205) to pass through the air vent hole (301). The pressurizing unit filter (30) may be configured to be impermeable to liquids but permeable to gases. The pressurizing unit filter (30) may be hydrophobic. The pressurizing unit filter (30) will be described later with reference to Figures 13 to 16.

[0066] The receptacle 310 may have a liquid containing portion 305 that contains a liquid substance 7. The receptacle 310 may have an opening 307 that opens in a direction that looks into the liquid containing portion 305. The receptacle 310 may include a solid containing portion 306 that contains a solid substance 6. The receptacle 310 may include an upper receptacle housing 311 and a lower receptacle housing 312. The liquid containing portion 305 may be formed within the upper receptacle housing 311. The solid containing portion 306 may be formed within the lower receptacle housing 312.

[0067] The liquid containing portion 305 and the solid containing portion 306 of the receptacle 310 may be separated by a partition 320. The partition 320 may isolate the liquid material 7 and the solid material 6 by closing the opening 307 in a closed position. The closed position may be a position in which the partition 320 is coupled to the receptacle 310 such that the partition 320 isolates the liquid material 7 and the solid material 6, as shown in Figures 2 and 3.

[0068] The partition portion (320) may be coupled to the receptacle (310) by an adhesive. The partition portion (320) may be coupled to the lower receptacle housing (312). Wax may be applied to the lower receptacle housing (321). The partition portion (320) may be adhered to the surface of the lower receptacle housing (321) to which the wax has been applied. The partition portion (320) may be adhered to the lower receptacle housing (312) by using an adhesive, a UV (Ultra Violet) adhesive, or the like.

[0069] The septum portion (320) can be configured to move out of the closed position when an external force is applied to the receptacle (310). When an external force is applied to the receptacle (310), the septum portion (320) is disengaged from the receptacle (310) and the septum portion (320) can move away from the lower receptacle housing (312).

[0070] As an example, the lower receptacle housing 312 of the receptacle 310 may be made of a flexible material. The lower receptacle housing 312 made of a flexible material may be elastically deformed when pressed by an external force. When the lower receptacle housing 312 is elastically deformed and presses the solid material 6, the solid material 6 may press the partition wall 320. As a result, the partition wall 320 may move out of the closed position.

[0071] When the partition (320) is released from the closed position, the solid material (6) escapes into the liquid storage portion (305), and the liquid material (7) and the solid material (6) may come into contact with each other. When the liquid material (7) and the solid material (6) come into contact with each other, a gas (e.g., carbon dioxide) may be generated. The gas generated in the receptacle (310) may move to the pressurized space (205) through the air vent hole (301), thereby increasing the air pressure in the pressurized space (205). As the air pressure in the pressurized space (205) increases, the piston (200) may move in the pressurizing direction (Ap1).

[0072] The solid container (306) can contain the boosting material (5) together with the solid material (6). The boosting material (5) comes into contact with the liquid material (7) before the solid material (6) at the moment the partition (320) is released from the closed position, and can rapidly increase the amount of gas generated at the initial stage of the reaction. This allows the gas pressure in the pressurized space (205) to be sufficiently increased even at the initial stage of the reaction when the reaction between the solid material (6) and the liquid material (7) is not yet sufficient.

[0073] The solid material (6) may be, for example, in the form of pellets based on sodium bicarbonate. The liquid material (7) may be an acidic liquid material (7) such as citric acid that generates carbon dioxide upon reaction with the solid material (6). The boosting material (5) may be based on a high concentration of the solid material (6), i.e., a high concentration of sodium bicarbonate.

[0074] Meanwhile, the pressure action unit (300) may include a rotating unit (330) rotatably coupled to the receptacle (310). The pressure action unit (300) may include a pressure unit (340) configured to move in a direction approaching the receptacle (310) as the rotating unit (330) rotates. The configurations of the rotating unit (330) and the pressure unit (340) will be described later with reference to Figures 17 to 20.

[0075] Fig. 5 is an enlarged view of the liquid medicine inlet (110) in the liquid medicine injector (10) shown in Fig. 4. Fig. 6 is a partially cutaway perspective view of the liquid medicine inlet (110) shown in Fig. 5 with the cap part (111) and the base part (113) separated from each other.

[0076] 5 and 6, the packing part 112 may include a first pillar part 1122. The packing part 112 may include a second pillar part 1123 connected to a lower end of the first pillar part 1122. The second pillar part 1123 may have an outer diameter larger than the outer diameter of the first pillar part 1122.

[0077] The packing portion (112) may include an outwardly extending pinch portion (1124). The pinch portion (1124) may extend outwardly from a lower end of the second post portion (1123). The pinch portion (1124) may be configured to be interposed and fixed between the cap portion (111) and the base portion (113).

[0078] The packing unit 112 may include a drug solution inlet hole 1121. The packing unit 112 may adjust the flow of the drug solution using the drug solution inlet hole 1121. The packing unit 112 may be configured such that the drug solution inlet hole 1121 is opened to allow the drug solution to flow from the outside to the inside of the chamber 100, and is closed to prevent the drug solution from flowing from the inside of the chamber 100 to the outside. Thus, the drug solution inlet hole 1121 may prevent the drug solution from flowing back from the inside of the chamber 100 to the outside. The drug solution inlet hole 1121 may function as, for example, a check valve (one-way valve).

[0079] In one embodiment, the packing part (112) may include a protrusion (1125) protruding in the direction of the inflow of the chemical solution. A chemical solution inflow hole (1121) is formed at the protruding end of the protrusion (1125). The hole (751a) is formed for the flushing liquid to pass through. The chemical solution inflow hole (1121) opens or closes depending on the flow direction of the chemical solution. When the chemical solution flows from the outside to the inside of the chamber (100), the protrusion (1125) opens to both sides and the chemical solution inflow hole (1121) opens, and when the chemical solution flows from the inside of the chamber (100) to the outside, the protrusion (1125) narrows and closes.

[0080] The cap part (111) may include a first cylinder part (1111). The cap part (111) may include a second cylinder part (1112) having an inner diameter larger than that of the first cylinder part (1111). The cap part (111) defines a through hole extending through the center of the cap part (111). The through hole may extend through the first cylinder part (1111) and the second cylinder part (1112). A liquid injection tool (S, see FIG. 8) such as a syringe may be inserted into the through hole. At least one recess (111B) may be formed in the first cylinder part (1111). As shown in FIG. 6, the cap part (111) may include a pressing part (1113) protruding in a direction toward the sandwiching part (1124) of the packing part (112). The pressing portion (1113) may contact the sandwiching portion (1124) to fix the sandwiching portion (1124). At least one opening (1114) may be formed in the pressing portion (1113). The pressing portion (1113) may pressurize the sandwiching portion (1124) of the packing portion (112) to fix the packing portion (112) at a predetermined position between the cap portion (111) and the base portion (113). The at least one opening (1114) formed in the pressing portion (1113) may be configured to allow air to pass through. For example, the at least one opening (1114) may be formed along the outer periphery of the pressing portion (1113), and air may pass through the opening (1114) and be discharged to the outside.

[0081] FIG. 7 is an enlarged view of a part of the liquid injector (10) shown in FIG. 3, including the liquid inlet (110).

[0082] 7, the inner surface (111A) of the cap part (111) may define an air exhaust hole (114) that fluidly connects the liquid medicine storage space (105) inside the chamber (100) with the outside. The air exhaust hole (114) may be a passage space through which air can flow, formed between the cap part (111) and the packing part (112) and / or between the cap part (111) and the base part (113). The air exhaust hole (114) includes an inlet (114A) of the air exhaust hole (114) that extends to the liquid medicine storage space (105). The inlet (114A) of the air exhaust hole (114) may be formed on a lower surface of the base part (113) and may extend to an upper surface of the base part (113).

[0083] The outer surface (112A) of the packing part (112) may be configured to come into contact with the inner surface (111A) of the cap part (111) to close the air exhaust hole (114). The upper surface (112A1) of the packing part (112) may be configured to come into airtight contact with the lower surface (111A1) of the first cylinder part (1111) of the cap part (111) which defines a part of the air exhaust hole (114) to close the air exhaust hole (114). As the air exhaust hole (114) is closed by the packing part (112), fluid communication through the air exhaust hole (114) is not possible. As shown in FIG. 7, when no external force is applied to the packing part (112) and the packing part (112) is not deformed, the gas in the medicinal solution storage space (105) cannot pass through the air exhaust hole (114), and therefore, fluid communication through the air exhaust hole (114) is not possible.

[0084] An outer circumferential surface (112A2) of the packing part (112) and an inner circumferential surface (111A2) of the cap part (111) may face each other. A predetermined space (115) may be formed between the outer circumferential surface (112A2) of the packing part (112) and the inner circumferential surface (111A2) of the cap part (111). The space (115) may be formed between the outer circumferential surface (112A2) of the first column part (1122) of the packing part (112) and the inner circumferential surface (111A2) of the second cylinder part (1112) that defines a part of the air exhaust hole (114).

[0085] FIG. 8 is a view showing a part including the drug solution inlet part 110 when the packing part 112 in FIG. 7 is elastically deformed by external pressure.

[0086] 8, when the packing part (112) is elastically deformed by being pressurized from the outside, a gap (g) capable of fluid communication may be formed between the outer surface (112A) of the packing part (112) and the inner surface (111A) of the cap part (111). The gap (g) may be formed to open the air exhaust hole (114). The packing part (112) may be pressurized by, for example, a liquid inlet tool (S) for injecting a liquid. The liquid inlet tool (S) may be, for example, a syringe. When the packing part (112) is pressurized from the outside, a portion of the packing part (112) may be elastically deformed and configured to be introduceable into the isolated space (115; see FIG. 7). When the packing part (112) is pressurized from the outside, a part of the packing part (112) is compressed and introduced into the separated space (115), and the contact between the lower surface (111A1) of the first cylinder part (1111) and the upper surface (112A1) of the packing part (112) is smoothly released, and a gap (g) may be formed. The gap (g) may be effectively generated by providing the separated space (115) into which a part of the packing part (112) may be compressed and introduced. The gap (g) may be opened by the formation of the gap (g). The air exhaust hole (114) may be opened by the opening of the air exhaust hole (114), so that air inside the medicinal liquid storage space (105) may be exhausted to the outside through the air exhaust hole (114). The air inside the medicinal liquid storage space (105) may flow into the inlet (114A) of the air exhaust hole (114) and then be exhausted to the outside through the gap (g). This allows fluid communication through the air exhaust hole (114).

[0087] When the packing part (112) is pressurized from the outside, at least one recess (111B) formed on the inner circumferential surface (111A2) of the first cylinder part (1111) so as to extend from the upper surface (1111A2) to the lower surface (111A1) of the first cylinder part (1111) may be connected to the gap (g). At a position corresponding to the recesses (111B), a part of the upper surface of the packing part (112) that is in contact with the lower surface of the first cylinder part (1111) may be released from contact. The recesses (111B) are connected to the gap (g), so that fluid communication through the air exhaust hole (114) may be more smoothly performed.

[0088] By opening and closing the air exhaust hole 114, when the liquid medicine is filled, i.e., when the packing part 112 is pressurized and deformed, the gas in the liquid medicine storage space 105 can be discharged to the outside of the liquid medicine injection device 10. Therefore, the gas in the liquid medicine storage space 105 can be smoothly discharged to the outside, and the liquid medicine can be prevented from leaking out to the outside.

[0089] FIG. 9 is an elevational view of the drug solution inlet and the hydrophobic filter shown in FIG. 2 as viewed in the directions of arrows B and B', and FIG. 10 is a view of FIG. 9 without the hydrophobic filter.

[0090] 9 and 10, the hydrophobic filter 20 may be configured to be impermeable to liquids but permeable to gases. The hydrophobic filter 20 may allow only gases to pass through the portion in which the hydrophobic filter 20 is disposed. The hydrophobic filter 20 may be disposed on a lower surface of the base portion 113 of the drug solution inlet portion 110. Here, an inlet 114A of the air exhaust hole 114 may be formed on the lower surface of the base portion 113. The hydrophobic filter 20 may be disposed to cover the inlet 114A of the air exhaust hole 114 from below. The hydrophobic filter 20 may be disposed such that air moving from the inside of the chamber 100 (see FIG. 2) to the outside through the inlet 114A of the air exhaust hole 114 passes through the hydrophobic filter 20. The hydrophobic filter (20) may be disposed so that liquid (eg, a medical solution) stored inside the chamber (100) cannot move to the outside through the inlet (114A) of the air exhaust hole (114).

[0091] FIG. 11 is an exploded perspective view of the hydrophobic filter (20) shown in FIG.

[0092] 11, the hydrophobic filter (20) may include a first hydrophobic filter layer (20a) and a second hydrophobic filter layer (20b). The first hydrophobic filter layer (20a) and the second hydrophobic filter layer (20b) may be adhered to one another to form the hydrophobic filter (20).

[0093] FIG. 12 is a cross-sectional view of the hydrophobic filter (20) shown in FIG. 11 in a lateral direction perpendicular to the lamination direction of the first and second hydrophobic filter layers (20b).

[0094] 9 to 12, the first hydrophobic filter layer (20a) and the second hydrophobic filter layer (20b) may be bonded to each other to form a plurality of block boundaries (21). As shown in FIG. 9, the plurality of block boundaries (21) may be arranged in a ring shape. The plurality of block boundaries (21) may define a range in which liquid can move in a horizontal direction perpendicular to the lamination direction of the first hydrophobic filter layer (20a) and the second hydrophobic filter layer (20b). The plurality of block boundaries (21) may define a plurality of block boundary regions (25) as a range in which liquid can move. The plurality of block boundaries (21) may prevent the movement of liquid from any one block boundary region (25) to another block boundary region (25) adjacent thereto in the horizontal direction. The plurality of block boundaries (21) may define a plurality of block boundary regions (25) as a range in which liquid can move in the horizontal direction, thereby preventing liquid from passing through the hydrophobic filter (20) in units of block boundary regions (25). That is, since the flow of liquid in the lateral direction is prevented between the two hydrophobic filter layers (20a, 20b), even if a portion of the first hydrophobic filter layer (20a) in one block boundary region (25) separated by one block boundary (21) is damaged and a portion of the second hydrophobic filter layer (20b) in another block boundary region (25) separated by another block boundary (21) is damaged, liquid can be prevented from passing through the hydrophobic filter (20). Therefore, the effect of damage to a portion of the hydrophobic filter (20) can be minimized, and leakage of the medicinal liquid can be effectively prevented.

[0095] As an example, the first hydrophobic filter layer (20a) may include a first block boundary forming portion (22a). The second hydrophobic filter layer (20b) may include a second block boundary forming portion (22b). The first block boundary forming portion (22a) and the second block boundary forming portion (22b) may together form a plurality of block boundaries (21). The first block boundary forming portion (22a) and the second block boundary forming portion (22b) may protrude in a direction facing each other from the first hydrophobic filter layer (20a) and the second hydrophobic filter layer (20b), respectively.

[0096] As another example, the first hydrophobic filter layer (20a) and the second hydrophobic filter layer (20b) may be bonded to each other along a portion thereof, so that a plurality of block boundaries (21) are formed by the bonded portion. The bonded portion may form a structure (22a, 22b) that connects the first hydrophobic filter layer (20a) and the second hydrophobic filter layer (20b) in the stacking direction. The first hydrophobic filter layer (20a) and the second hydrophobic filter layer (20b) may be thermally bonded to each other. For example, when the first hydrophobic filter layer (20a) and the second hydrophobic filter layer (20b) are brought into contact with each other and then heat is applied, the first hydrophobic filter layer (20a) and the second hydrophobic filter layer (20b) may be bonded to each other while being in close contact with each other along the structure (22a, 22b).

[0097] 9, the inlets (114A) of the air exhaust holes (114) may be formed on the lower surface of the base portion (113). The entirety of the plurality of block boundary regions (25) may be formed to correspond to the inlets (114A) of the air exhaust holes (114). The inlets (114A) of the air exhaust holes (114) are formed at positions corresponding to each block boundary region (25) defined by the plurality of block boundaries (21).

[0098] For example, the inlet (114A) of the air exhaust hole (114) may be formed to extend in a circular shape on the lower surface of the base portion (113) so as to cover the entire block boundary regions (25).

[0099] As another example (not shown), the inlets 114A of the air exhaust holes 114 may be formed in a plurality of locations. The plurality of air exhaust holes 114 may be formed spaced apart from one another along the periphery. The plurality of block boundary regions 25 of the hydrophobic filter 20 may be disposed to correspond to the inlets 114A of the air exhaust holes 114 formed spaced apart from one another.

[0100] Air inside the chamber 100 must escape to the outside through the air exhaust hole 114. However, liquid may also flow through the formed air exhaust hole 114, and in this case, liquid, such as a medical solution, stored inside the chamber 100 may leak out. The hydrophobic filter 20 according to the present disclosure forms a plurality of block boundaries 21 and can prevent liquid from passing through the block boundaries 21 as a unit.

[0101] FIG. 13 is an enlarged view of the pressurizing section (300) of the liquid injector (10) shown in FIG.

[0102] 13, the pressurizing operation unit (300) may have an air vent hole (301) for guiding gas generated in the receptacle (310) to the pressurized space (205). The air vent hole (301) may be a passage space through which gas generated by the reaction between the solid material (6) and the liquid material (7) contained in the receptacle (310) can flow. For example, carbon dioxide generated in the receptacle (310) may move to the pressurized space (205) through the air vent hole (301). The gas moved to the pressurized space (205) increases the gas pressure in the pressurized space (205), and the piston (200) may move in the pressurizing direction (Ap1, see FIG. 2). The liquid injector (10) may include a pressurizing unit filter (30). The pressurized part filter (30) may be disposed so that gas moving from inside the receptacle (310) through the air vent hole (301) to the pressurized space (205) passes through it.

[0103] 14 is a cross-sectional view of the pressurizing action part (300) shown in FIG. 13 taken along the line CC', and FIG. 15 is a view of FIG. 14 with a plurality of pressurizing part filters (30) removed.

[0104] 13 to 15, the air vent hole (301) may include a plurality of inlets (301A) of the air vent hole (301). Carbon dioxide generated in the receptacle (310) may flow into the air vent hole (301) through the inlets (301A) of the air vent hole (301) and then move to the pressurized space (205).

[0105] The pressurizing part filters (30) may be configured to be impermeable to liquids but permeable to gases. The pressurizing part filters (30) may allow only gases to pass through the portion where the pressurizing part filters (30) are arranged. The pressurizing part filters (30) may be arranged to be spaced apart from each other and to cover the inlets (301A) of the air vent holes (301). The pressurizing part filters (30) may be arranged at positions corresponding to the inlets (301A) of the air vent holes (301). The pressurizing part filters (30) may be arranged so that gas moving from inside the receptacle (310) to the pressurized space (205) passes through the pressurizing part filters (30), and so that liquid stored inside the receptacle (310) cannot move to the outside through the air vent holes (301).

[0106] 14, the inlet (301A) of the air vent hole (301) may be formed in the circumferential direction around an axis parallel to the pressurizing direction. A plurality of pressurizing part filters (30) may also be arranged spaced apart from one another in the circumferential direction around an axis parallel to the pressurizing direction. Here, the inlet (301A) of the air vent hole (301) may be formed at a position farther from the axis than the center (30C) of the corresponding pressurizing part filter (30). The inlet (301A) of the air vent hole (301) may be located closer to the upper receptacle housing (311) than the center (30C) of the corresponding pressurizing part filter (30).

[0107] FIG. 16 is a perspective view of the pressurizing section filter (30) shown in FIG.

[0108] 14 and 16, each of the multiple pressurizing part filters (30) may include multiple laminated hydrophobic filter layers. As an example, the pressurizing part filter (30) may include a first pressurizing part filter layer (30a). The pressurizing part filter (3) may include a second pressurizing part filter layer (30b). The first pressurizing part filter layer (30a) and the second pressurizing part filter layer (30b) may be formed by adhering to each other. Here, the first pressurizing part filter layer (30a) and the second pressurizing part filter layer (30b) may be thermally bonded to each other. For example, when the first pressurizing part filter layer (30a) and the second pressurizing part filter layer (30b) are brought into contact with each other and then heat is applied, the first pressurizing part filter layer (30a) and the second pressurizing part filter layer (30b) may be bonded to each other while being in close contact with each other. Here, an edge portion of the first pressure section filter layer (30a) and an edge portion of the second pressure section filter layer (30b) can be bonded to each other.

[0109] As another example not shown, the hydrophobic filter (20) described with reference to Figures 9 to 12 may be arranged so that gas moving from inside the receptacle (310) to the pressurized space (205) through the air vent hole (301) passes through. The multiple block boundaries (21) of the hydrophobic filter (20) define multiple block boundary regions (25), and the hydrophobic filter (20) may be arranged so that each of the multiple block boundary regions (25) covers each of the multiple air vent holes (301). The inlets (301A) of the multiple air vent holes (301) may be formed at positions corresponding to the multiple block boundary regions (25) defined by the multiple block boundaries.

[0110] FIG. 17 is a perspective view of one embodiment of the pressure action part (300) shown in FIG. 13, and FIG. 18 is a cross-sectional view taken along the line D-D' of the pressure action part (300) shown in FIG.

[0111] 17 and 18, the rotating part 330 of the pressure operating part 300 may be configured to be rotatable with respect to the receptacle 310. For example, the rotating part 330 may be rotatably coupled to the lower receptacle housing 312 of the receptacle 310. The pressure part 340 of the pressure operating part 300 may be configured to be pressed and moved in an upward direction (hereinafter, a first direction D1) in which the rotating part 330 approaches the receptacle 310 as the rotating part 330 rotates. The pressure part 340 may be configured to pressurize the receptacle 310 and release the separation of the partition wall part 320 by moving in the first direction D1. The pressure part 340 may pressurize the receptacle 310 to move the partition wall part 320 away from the closed position.

[0112] The rotating unit 330 may rotate about an up-down axis, i.e., an axis parallel to the first direction D1, with respect to the receptacle 310. As an example, the rotating unit 330 may rotate about an axis (virtual axis) parallel to the first direction D1 along a first rotation direction R1 and a second rotation direction R2, which is the opposite direction to the first rotation direction R1, as shown in FIG. 17. Here, the first rotation direction R1 and the second rotation direction R2 are presented for the convenience of explaining the rotation direction of the rotating unit 330.

[0113] When it is necessary to use the liquid injector (10, see FIG. 1), the user can rotate the rotating part (330) relative to the receptacle (310) while holding a portion other than the rotating part (330). The user can rotate the rotating part (330) along the first rotation direction (R1) or the second rotation direction (R2). This causes the rotating part (330) to rotate relative to the receptacle (310), and the pressurizing part (340) can move in the first direction (D1) in accordance with the rotation of the rotating part (330).

[0114] The pressing portion (340) may include a plate portion (342) disposed inside the rotating portion (330) and configured to be able to pressurize the receptacle (310). The plate portion (342) may be substantially disk-shaped. The pressing portion (340) may include a protruding portion (343) configured to protrude convexly in the first direction (D1) and pressurize a predetermined portion of the receptacle (310). The protruding portion (343) may protrude convexly from the plate portion (342) in the first direction (D1), i.e., toward an upward direction approaching the receptacle (310). The protruding portion (343) may pressurize the receptacle (310) when the pressing portion (340) approaches the receptacle (310). In this embodiment, the pressure member 340 is configured to move from a state separated from the receptacle 310 toward the receptacle 310 to apply pressure to the receptacle 310, but in other embodiments not shown, the pressure member 340 may be configured to move from a state already in contact with the receptacle 310 toward the receptacle 310 to apply pressure to the receptacle 310. The protrusion 343 can concentrate the pressure applied to the receptacle 310 at a predetermined portion.

[0115] The pressure applying portion (340) may include at least one protrusion (341) that contacts the rotating portion (330). The protrusion (341) may extend outward from the plate portion (342). As shown in FIG. 17, the at least one protrusion (341) may be a plurality of protrusions (341) spaced apart from one another along the outer periphery of the plate portion (342). The plurality of protrusions (341) may be spaced apart from one another at the same intervals and at the same height relative to the plate portion (342). In this embodiment, three protrusions (341) are provided, but the number of protrusions (341) is not limited thereto.

[0116] The receptacle (310) may include an insertion groove (316) into which the protrusion (341) is inserted. The insertion groove (316) may be formed in a lower receptacle housing (312) of the receptacle (310). The protrusion (341) extending outward from the plate portion (342) may pass through the insertion groove (316) formed in the lower receptacle housing (312) from the inside to the outside. The insertion groove (316) may be formed to extend in the first direction (D1). The insertion groove (316) formed to extend in the first direction (D1) may guide the movement of the protrusion (341) in the first direction (D1). The insertion groove (316) may limit the movement in a horizontal direction transverse to the first direction (D1). The horizontal width of the insertion groove (316) may be sized to correspond to the horizontal width of the protrusion (341) so that the protrusion (341) is inserted but prevents the protrusion (341) from moving horizontally.

[0117] The rotating part (330) includes at least one guide part (331). The at least one guide part (331) may be multiple. The at least one guide part (331) may be formed along an inner surface of the rotating part (330). The at least one guide part (331) may contact the pressing part (340). The at least one guide part (331) may contact a protrusion part (341). The at least one guide part (331) may include a first inclined surface (332a) whose height in the first direction (D1) decreases along the first rotation direction (R1) of the rotating part (330). The first inclined surface (332a) may increase in height in the first direction (D1) along the second rotation direction (R2) that is opposite to the first rotation direction (R1).

[0118] Also, at least one guide portion (331) may include a second inclined surface (332b) that decreases in height in the first direction (D1) along a second rotation direction (R2) that is opposite to the first rotation direction (R1). The second inclined surface (332b) may increase in height in the first direction (D1) along the first rotation direction (R1).

[0119] When the user rotates the rotating part (330) in the first rotation direction (R1) in the pre-operation state shown in Figures 17 and 18, the protrusion (341) of the pressure part (340) can slide along the first inclined surface (332a). When the user rotates the rotating part (330) in the second rotation direction (R2) in the pre-operation state, the protrusion (341) of the pressure part (340) can slide along the second inclined surface (332b). Other aspects of the pressure action part (300) when the user rotates the rotating part (330) in the first rotation direction (R1) or the second rotation direction (R2) are shown in Figures 19 and 20.

[0120] 19 is a perspective view of another embodiment of the pressure action part (300) shown in FIG. 17, and FIG. 20 is a cross-sectional view taken along the line E-E' of the pressure action part (300) shown in FIG.

[0121] 19 and 20, as the rotating part (330) rotates in the first rotation direction (R1), at least one guide part (331) also rotates in the first rotation direction (R1). When at least one guide part (331) rotates along the first rotation direction (R1), the first inclined surface (332a) also rotates in the first rotation direction (R1). When the first inclined surface (332a) rotates in the first rotation direction (R1), the height of the first inclined surface (332a) along which the pressing part (340) slides increases in the first direction (D1). This allows the pressing part (340) to move in the first direction (D1) to press the receptacle (310). The pressing part (340) may be configured to move in the first direction (D1) by sliding along the first inclined surface (332a) of the at least one guide part (331). Here, in the configuration of the pressure member (340), the protrusion (341) can slide along the first inclined surface (332a) of at least one guide member (331). The protrusion (341) can slide along the first inclined surface (332a) while being inserted into the insertion groove (316). Since the insertion groove (316) restricts the movement in the horizontal direction, the protrusion (341) cannot rotate in the first rotation direction (R1) along the first inclined surface (332a) and can move only in the first direction (D1). The movement of the protrusion (341) in the first direction (D1) allows the plate portion (342) and the convex portion (343) to also move in the first direction (D1).

[0122] As the rotating portion (330) rotates in the second rotation direction (R2), at least one guide portion (331) also rotates in the second rotation direction (R2). When at least one guide portion (331) rotates along the second rotation direction (R2), the second inclined surface (332b) also rotates in the second rotation direction (R2). When the second inclined surface (332b) rotates in the second rotation direction (R2), the height of the second inclined surface (332b) along which the pressing portion (340) slides increases in the first direction (D1). This allows the pressing portion (340) to move in the first direction (D1) to press the receptacle (310). The pressing portion (340) may be configured to move in the first direction (D1) by sliding along the second inclined surface (332b) of the at least one guide portion (331). Substantially the same as described above, the protrusion 341 can slide along the second inclined surface 332b while being inserted into the insertion groove 316. At this time, the protrusion 341 cannot rotate in the second rotation direction R2, but can only move in the first direction D1.

[0123] The rotating part (330) may be configured to move the pressing part (340) in the first direction (D1) when rotating in the first rotation direction (R1) and when rotating in the second rotation direction (R2). Thus, the pressing part (340) can move in the first direction (D1) regardless of the direction in which the user rotates the rotating part (330). That is, the user can rotate the rotating part (330) in any one direction without distinction between the first rotation direction (R1) and the second rotation direction (R2), and thus the pressing part (340) can approach the receptacle (310). Here, the protruding part (343) of the pressing part (340) can press a predetermined part of the receptacle (310), and the isolation of the partition part (320) can be released by the protruding part (343) pressing the predetermined part of the receptacle (310).

[0124] The user can rotate the rotating part 330 to more easily and reliably release the separation of the partition 320. In addition, since the separation of the partition 320 can be released regardless of the rotation direction of the rotating part 330, the user can use the liquid injection device 10 with increased convenience. Therefore, the liquid injection device 10 can be used more efficiently.

[0125] Although the technical idea of ​​the present disclosure has been described above by way of some embodiments and examples shown in the accompanying drawings, it should be understood that various substitutions, modifications and changes may be made without departing from the technical idea and scope of the present disclosure that can be understood by a person having ordinary skill in the art to which the present disclosure pertains. In addition, such substitutions, modifications and changes should be considered to fall within the scope of the appended claims.

Claims

1. A chamber configured such that a medicinal solution may be stored therein; A piston configured to be slidable in the chamber in a predetermined pressure direction so as to pressurize the medicinal liquid stored in the chamber; and a pressurizing operation unit configured to increase a pressure of a gas in a pressurized space formed in a direction opposite to the pressurizing direction of the piston so as to pressurize the piston; The pressure action unit is a receptacle for containing a liquid substance and a solid substance that generates a gas upon contact with said liquid substance; a partition disposed between the liquid material and the solid material to separate the liquid material from the solid material; a rotating portion rotatably coupled to the receptacle; and a pressure unit configured to be pressed and move in a first direction approaching the receptacle as the rotating unit rotates, and to pressurize the receptacle by moving in the first direction to release the separation of the partition wall, Chemical injection device.

2. The chemical liquid injector according to claim 1 , wherein a rotation axis of the rotation portion relative to the receptacle is parallel to the first direction.

3. the rotating portion includes at least one guide portion including a first inclined surface whose height in the first direction decreases along a first rotation direction of the rotating portion, The liquid injector according to claim 1 , wherein when the rotating portion rotates in the first rotation direction, the pressurizing portion moves in the first direction by sliding along the first inclined surface of the guide portion.

4. The at least one guide portion further includes a second inclined surface that is reduced in height in the first direction along a second rotation direction that is opposite to the first rotation direction of the rotating portion, The chemical liquid injector according to claim 3 , wherein when the rotating portion rotates in the second rotation direction, the pressurizing portion moves in the first direction by sliding along the second inclined surface of the guide portion.

5. The pressure applying unit is A plate portion disposed inside the rotating portion and configured to be able to apply pressure to the receptacle; and The chemical liquid injector according to claim 3 , further comprising at least one protrusion contacting the guide portion and extending outward from the plate portion.

6. The at least one guide portion includes a plurality of guide portions arranged along a rotation direction of the rotating portion, The chemical liquid injector according to claim 5 , wherein the at least one protrusion includes a plurality of protrusions arranged along a periphery of the plate portion so as to contact the plurality of guide portions, respectively.

7. the receptacle includes an insertion groove into which the protrusion is inserted, The liquid injector according to claim 5 , wherein the insertion groove is formed to extend in the first direction so as to guide movement of the protrusion in the first direction and to restrict movement of the protrusion in a lateral direction intersecting the first direction.

8. The chemical liquid injector according to claim 1 , wherein the pressurizing portion includes a protrusion that protrudes in the first direction and is configured to pressurize a predetermined portion of the receptacle.

9. The receptacle includes: A liquid storage portion for storing the liquid substance; and 9. The chemical liquid injection device of claim 8, further comprising a solid containing section having an opening that opens in a direction looking at the liquid containing section, containing the solid substance, and in which the specified portion is located, and the partition section isolates the liquid substance from the solid substance by closing the opening in a closed position.

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