WO2023200286A1

WO2023200286A1 - Medicinal liquid injection device

Info

Publication number: WO2023200286A1
Application number: PCT/KR2023/005059
Authority: WO
Inventors: 쥐 웰스포드이안; 네프제임스; 플린트니브
Original assignee: 이오플로우㈜
Priority date: 2022-04-15
Filing date: 2023-04-14
Publication date: 2023-10-19
Also published as: KR20230148323A

Abstract

An embodiment of the present invention provides a medicinal liquid injection device capable of improving user convenience, comprising: a reservoir unit in which medicinal liquid is accommodated; a pressure generating unit which is connected to the reservoir unit and provides a flow path for the medicinal liquid supplied from the reservoir unit; and a needle assembly which can receive the medicinal liquid from the pressure generating unit and discharge same to the outside, wherein the pressure generating unit increases the pressure of the medicinal liquid while the medicinal liquid flows in a preset direction, so that the medicinal liquid can be stably supplied to the needle assembly.

Description

chemical injection device

The present invention relates to a chemical injection device.

Generally, a drug injection device such as an insulin injection device is used to inject a drug solution into a patient's body. These chemical 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.

Diabetic patients, especially pediatric diabetic patients, need to inject medicinal solutions such as insulin into the body at set intervals. A patch-type drug injection device that is attached to the human body for a certain period of time is being developed, and this drug injection device can be used while attached to the patient's body, such as the abdomen or waist, in the form of a patch for a certain period of time.

In order to increase the effect through drug injection, the drug injection device needs to be controlled to precisely inject the drug into the patient's body. It is important to precisely inject a small amount of drug solution through a small drug injection device.

When attached to the human body, a chemical injection device needs to be comfortable to wear, convenient to use, durable, and run at low power. In particular, since the drug injection device is used by attaching it directly to the patient's skin, it is important for the user to conveniently and safely operate the drug injection device.

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).

Conventional chemical injection devices had an alarm function that notified the user of normal operation or malfunction, but there was a problem in that the alarm continued due to an error even in normal operation, causing inconvenience to the user.

The present invention provides a chemical injection device in which the pressure generator generates pressure by the flow of fluid and the chemical liquid can be stably supplied to the needle assembly, thereby improving user convenience.

One aspect of the present invention includes a reservoir unit containing a chemical solution; a pressure generator connected to the reservoir unit and providing a flow path for the chemical solution supplied from the reservoir unit; and a needle assembly capable of receiving the chemical solution from the pressure generator and discharging it to the outside, wherein the pressure generator increases the pressure of the chemical solution while the chemical solution flows in a preset direction. Provides a device.

In addition, it may further include a valve portion disposed between the pressure generator and the needle assembly and supplying a preset amount of chemical solution to the needle assembly.

In addition, it may further include a sensor unit connected to the valve unit and sensing the flow rate of the chemical solution flowing into the valve unit.

In addition, it may further include a control unit that is electrically connected to the sensor unit and receives information about the flow rate of the chemical solution from the sensor unit to control the operation of the pressure generator.

In addition, it may further include a power supply unit that is electrically connected to the pressure generator and supplies power to the pressure generator to form an electric field.

In addition, it may further include a base portion on which the reservoir unit, the pressure generating portion, and the needle assembly are installed.

Additionally, the needle assembly may include a needle portion that penetrates the base portion and is exposed to the outside.

In the chemical injection device according to an embodiment of the present invention, the pressure generator receives voltage and generates pressure by the flow of fluid, and the chemical liquid can be stably supplied to the needle assembly, providing convenience to the user. It works.

In addition, due to the valve part capable of changing shape, a preset amount of chemical solution is supplied to the needle assembly, which has the effect of precisely controlling the amount of chemical solution injected into the user.

Of course, the scope of the present invention is not limited by this effect.

1 is a block diagram showing a chemical injection system according to an embodiment of the present invention.

Figure 2 is a block diagram showing a chemical injection device according to an embodiment of the present invention.

Figure 3 is a perspective view partially showing a chemical injection device according to an embodiment of the present invention.

Figure 4 is a side cross-sectional view showing part A of Figure 3.

Figure 5 is a plan view showing a pressure generator according to an embodiment of the present invention.

Figure 6 is an enlarged view showing part B of Figure 5.

Figure 7 is a perspective view showing a pressure generator according to another embodiment of the present invention.

Figure 8 is a diagram schematically showing a valve unit according to an embodiment of the present invention.

Figure 9 is a block diagram showing a sensor unit, a control unit, etc. according to an embodiment of the present invention.

FIG. 10 is a diagram showing the state in which the chemical solution flows in FIG. 8.

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.

Figure 1 is a block diagram showing a chemical injection system 1 according to an embodiment of the present invention.

Referring to FIG. 1 , the drug injection system 1 may include a drug injection device 10, a user terminal 20, a controller 30, and a biometric information sensor 40. The drug injection system 1 allows the user to drive and control the system using the user terminal 20, and the drug injection device 10 injects the drug based on the blood sugar information monitored by the biometric information sensor 40. It can be injected periodically.

The drug injection device 10 injects drugs to be injected into the user, such as insulin, glucagon, anesthetics, painkillers, dopamine, growth hormone, and smoking cessation aids, based on data sensed by the biometric information sensor 40. It also performs a function.

Additionally, the chemical injection device 10 may transmit a device status message including information on the device's remaining battery capacity, whether the device was successfully booted, whether the injection was successful, etc., to the controller 30 . Messages delivered to the controller may be delivered to the user terminal 20 through the controller 30. Alternatively, the controller 30 may transmit improved data processed from the received messages to the user terminal 20.

In one embodiment, the chemical injection device 10 is provided separately from the biometric information sensor 40 and may be installed to be spaced apart from the object. In another embodiment, the drug injection device 10 and the biometric information sensor 40 may be provided in one device.

In one embodiment, the drug injection device 10 may be mounted on the user's body. Additionally, in another embodiment, the chemical injection device 10 can be mounted on an animal to inject the chemical solution.

The user terminal 20 may receive an input signal from the user to drive and control the chemical injection system 1.

The user terminal 20 may generate a signal that drives the controller 30 and control the controller 30 to drive the chemical injection device 10.

Additionally, the user terminal 20 can display biometric information measured from the biometric information sensor 40 and status information of the chemical injection device 10 .

The user terminal 20 refers to a communication terminal that can be used in a wired or wireless communication environment. For example, the user terminal 20 includes a smartphone, a tablet PC, a PC, a smart TV, a mobile phone, a personal digital assistant (PDA), a laptop, a media player, a micro server, a global positioning system (GPS) device, an e-book terminal, It may be a digital broadcasting terminal, navigation, kiosk, MP3 player, digital camera, home appliance, camera-equipped device, and other mobile or non-mobile computing devices.

Additionally, the user terminal 20 may be a wearable device such as a watch, glasses, hair band, or ring equipped with a communication function and data processing function. However, as described above, terminals equipped with applications capable of Internet communication can be borrowed without limitation.

The user terminal 20 can be connected one-to-one with the pre-registered controller 30. The user terminal 20 may be encrypted and connected to the controller 30 in order to prevent the controller 30 from being driven and controlled by an external device.

In one embodiment, the user terminal 20 and the controller 30 may be separated and provided as separate devices. For example, the controller 30 may be provided to a subject equipped with the chemical injection device 10, and the user terminal 20 may be provided to the subject or a third party. The user terminal 20 is driven by the guardian, thereby improving the safety of the chemical injection system 1.

In another embodiment, the user terminal 20 and the controller 30 may be provided as one device. The controller 30, which is provided as one with the user terminal 20, can communicate with the drug injection device 10 to control the injection of the drug.

The controller 30 performs a function of transmitting and receiving data with the drug injection device 10, transmits a control signal related to the injection of drugs such as insulin to the drug injection device 10, and detects blood sugar levels from the biometric information sensor 40. Control signals related to measurement of biometric values, such as the like, can be received.

For example, the controller 30 may transmit an instruction request to measure the user's current state to the chemical injection device 10 and receive measurement data from the chemical injection device 10 in response to the instruction request.

The biometric information sensor 40 may perform a function of measuring the user's biometric values such as blood sugar level, blood pressure, and heart rate depending on the purpose. Data measured by the biometric sensor 40 may be transmitted to the controller 30, and the injection cycle or injection amount of the drug may be set based on the measured data. Data measured by the biometric information sensor 40 may be transmitted to the user terminal 20 and displayed.

As an optional embodiment, the biometric information sensor 40 may be a sensor that measures the blood sugar level of the subject. It may be a continuous glucose monitoring (CGM) sensor. A continuous blood sugar measurement sensor can be attached to an object and continuously monitor blood sugar level.

The user terminal 20, the controller 30, and the chemical injection device 10 may communicate using a network.

For example, networks include Local Area Network (LAN), Wide Area Network (WAN), Value Added Network (VAN), mobile radio communication network, satellite communication network, and their It is a comprehensive data communication network that includes mutual combinations and allows each network member to communicate smoothly with each other, and may include wired Internet, wireless Internet, and mobile wireless communication networks.

In addition, wireless communications include, for example, wireless LAN (Wi-Fi), Bluetooth, Bluetooth low energy, ZigBee, WFD (Wi-Fi Direct), UWB (ultra wideband), and infrared communications (IrDA). Data Association), NFC (Near Field Communication), 5G, etc., but are not limited to these.

Figure 2 is a block diagram showing a chemical injection device according to an embodiment of the present invention. Figure 3 is a perspective view partially showing a chemical injection device according to an embodiment of the present invention. Figure 4 is a side cross-sectional view showing part A of Figure 3. Figure 5 is a plan view showing a pressure generator according to an embodiment of the present invention. Figure 6 is an enlarged view showing part B of Figure 5. Figure 8 is a diagram schematically showing a valve unit according to an embodiment of the present invention. Figure 9 is a block diagram showing a sensor unit, a control unit, etc. according to an embodiment of the present invention. FIG. 10 is a diagram showing the state in which the chemical solution flows in FIG. 8.

Referring to FIGS. 2, 3, and 9, the chemical injection device 10 according to an embodiment of the present invention is attached to the body (HB) of the user to inject the chemical liquid (D), and contains the chemical liquid (D) stored therein. D) can be injected to the user at a preset cycle or in a preset amount.

The chemical injection device 10 can be used for various purposes depending on the type of chemical solution D to be injected. For example, the drug solution D may include an insulin-based drug solution for diabetic patients, a drug solution for the pancreas, a drug solution for the heart, and other various types of drug solutions.

Referring to FIGS. 2, 3, and 9, the chemical injection device 10 according to an embodiment of the present invention includes a base portion 100, a reservoir unit 200, a substrate portion 300, and a pressure generator. It may include (400), a valve unit (500), a needle assembly (600), a power unit (700), a sensor unit (810), and a control unit (850).

Referring to FIG. 3, the base portion 100 according to an embodiment of the present invention may include a base body 110 and a sealing member 130.

The base body 110 according to an embodiment of the present invention forms the exterior of the chemical injection device 10 and includes a reservoir unit 200, a substrate portion 300, a pressure generator 400, which will be described later, The valve unit 500, needle assembly 600, power unit 700, sensor unit 810, and control unit 850 may be installed, and the interior may be hollow.

One side of the base body 110 (lower surface in FIG. 3) is attachable to the body (HB) of a user such as a patient who is to be injected with the drug solution (D) through the drug injection device 10, and has an adhesive member (not shown). ) can be applied.

As an optional embodiment, the adhesive member may be covered by a separate cover (not shown), in the case where it is desired to attach the chemical injection device 10, specifically the base body 110, to the user's body (HB). The cover covering the adhesive member can be removed.

As a result, the adhesive member exerts adhesive force and has the effect of maintaining the chemical injection device 10, specifically the base body 110, attached to the user's body.

Referring to FIG. 3, the base body 110 is formed in a disk shape, but is not limited to this, and the side wall extends along the circumferential direction based on the center of the base body 110, and the inner space formed by the side wall is formed. A reservoir unit 200, a substrate unit 300, a pressure generator 400, a valve unit 500, a needle assembly 600, a power unit 700, a sensor unit 810, and a control unit 850 are disposed. Various modifications are possible, such as:

As an optional embodiment, the base body 110 may be formed in a polygonal shape, such as a square plate shape.

Although not shown in the drawing, the chemical injection device 10, specifically the base portion 100, includes a base body 110, a reservoir unit 200 disposed on the base body 110, a substrate portion 300, It may include a cover part (not shown) covering the pressure generating unit 400, valve unit 500, needle assembly 600, power unit 700, sensor unit 810, and control unit 850. Of course.

The cover portion covers the base body 110 and is connected to the base body 110, thereby preventing foreign substances from entering the chemical injection device 10 from the outside.

Referring to FIGS. 3 and 4, a needle assembly 600, which will be described later, may be connected to the base body 110 according to an embodiment of the present invention.

Referring to FIG. 4 , the needle assembly 600 may include a cannula (CN) and a needle portion (ND), and the needle portion (ND) may move within the cannula (CN) along a preset direction.

That is, when the needle part (ND) passes through the base body 110 and moves outward, it can contact and penetrate the user's body and inject the chemical solution (D) into the user, and when use is completed, in the opposite direction. The needle part ND may move and leave the user's body.

An opening may be formed at the outer end of the needle portion (ND) according to an embodiment of the present invention, and the medical solution (D) may be injected into the user's body (HB) through the opening.

As an optional embodiment, the cannula (CN) and the needle portion (ND) may be connected and formed as one piece. In this case, the material of the cannula (CN) and the material of the needle portion (ND) may be formed differently.

Referring to FIG. 4, the base body 110 may be formed with an insertion hole 110h through which the needle assembly 600, specifically the cannula CN through which the needle portion ND can move on the inside, can pass, A sealing member 130 may be disposed in the insertion hole portion 110h.

Referring to FIG. 4, the sealing member 130 may be formed of a material capable of elastic deformation, and may have a hole (reference numeral not set) through which the needle assembly 600, specifically the cannula CN, can penetrate and contact the sealing member 130. can be formed.

Since the sealing member 130 is disposed between the base body 110 and the cannula (CN) and is made of an elastically deformable material, the inner peripheral surface of the insertion hole portion 110h formed in the base body 110 and the cannula (CN) ) can seal the gap formed between them, and prevent the chemical solution (D) injected into the user's body (HB) from passing through the chemical injection device 10 and the base body 110 and flowing into the internal space. There is a possible effect.

Referring to FIGS. 2, 3, and 9, the reservoir unit 200 according to an embodiment of the present invention accommodates the chemical solution (D), and is installed in the base portion 100, specifically the base body 110. It is placed and may be connected to the needle assembly 600.

The chemical liquid (D) can be stored in the internal space of the reservoir unit 200, and the interior is hollow, and the chemical liquid (D) can be supplied to the pressure generator 400 through the supply pipe 201 formed in a tube shape. there is.

As an optional embodiment, the chemical solution (D) may be injected into the reservoir unit 200 through a separate external device (not shown).

A supply pipe 201 having a hollow interior may be extended on one side of the reservoir unit 200, and the internal space of the reservoir unit 200 may be communicated with the external space.

The supply pipe 201 formed in the reservoir unit 200 according to an embodiment of the present invention is connected to the pressure generator 400, which will be described later, and as pressure is generated in the pressure generator 400, the chemical liquid ( D) may flow in a preset direction, that is, in the direction of injection from the reservoir unit 200 through the needle assembly 600 into the user's body (HB).

Accordingly, the chemical liquid (D) from the reservoir unit 200 can additionally flow into the pressure generator 400 through the supply pipe 201, and the pressure of the chemical liquid (D) flowing in the pressure generator 400 is increased. This has the effect of supplying the chemical solution (D) to the valve unit 500 and needle assembly 600, which will be explained later.

Referring to FIG. 3, the substrate portion 300 according to an embodiment of the present invention is installed on the base portion 100, specifically the base body 110, and includes a pressure generating portion 400 and a needle assembly 600. ) and the power supply unit 700 are electrically connected, an electrical path can be provided.

As an optional embodiment, the substrate 300 may be a printed circuit board (PCB).

Although not shown in the drawing, the power supply unit 700 is disposed between the substrate unit 300 and one surface of the base body 110 (bottom surface based on FIG. 3), and is electrically connected to the pressure generating unit 400 and the needle assembly 600. It can be connected, and voltage can be applied to the pressure generator 400 and the needle assembly 600.

Referring to FIG. 4, the substrate portion 300 according to an embodiment of the present invention has a needle assembly 600, specifically a hole portion (drawing) so that a cannula (CN) within which the needle portion (ND) can move can pass. (sign not set) may be formed.

However, it is not limited to this, and the needle assembly 600, specifically the cannula CN, passes through the area where the substrate 300 is not disposed in the inner space of the base body 110, and then passes through the insertion hole formed in the base body 110. Various modifications are possible, such as passing (110h).

As an optional embodiment, the needle portion (ND) may not move along a preset direction inside the cannula (CN), but the needle portion (ND) and the cannula (CN) may be connected and formed as one body.

In this case, the cannula (CN) and the needle portion (ND) may be formed of different materials, and the stiffness of the needle portion (ND) may be relatively greater than that of the cannula (CN).

A control unit 850 may be disposed on the substrate unit 300, and the control unit 850 is electrically connected to the pressure generator 400, and provides information on the flow rate of the chemical solution (D) from the sensor unit 810, which will be described later. By receiving information and transmitting an electrical signal to the pressure generator 400, the operation of the pressure generator 400 can be controlled.

In addition, the control unit 850 may be electrically connected to the sensor unit 810, which will be explained later, and receives information about the flow rate of the chemical solution (D) from the sensor unit 810 to the pressure generator 400, which will be explained later. The operation of the pressure generator 400 can be controlled by transmitting an electrical signal.

Referring to FIGS. 2, 3, 5, and 6, the pressure generating unit 400 according to an embodiment of the present invention is connected to the reservoir unit 200, and the reservoir unit 200 and the valve unit It can be placed between (500).

The pressure generator 400 according to an embodiment of the present invention can provide a flow path for the chemical liquid (D) supplied from the reservoir unit 200, and the chemical liquid (D) flows along a preset direction. It has the effect of increasing the pressure of the chemical solution (D).

The pressure of the chemical liquid (D) increased by the pressure generator 400 according to an embodiment of the present invention may be transmitted to the valve unit 500, which will be described later, and the chemical liquid (D) having the pressure may be transmitted to the valve unit. It is delivered to 500, and when a preset flow rate flows into the valve unit 500, it can be injected from the valve unit 500 into the user's body (HB) through the needle assembly 600.

Referring to FIGS. 5 and 6 , the pressure generator 400 according to an embodiment of the present invention may include a pressure generator body 410 and an electrode portion 430. The pressure generating body 410 is disposed inside the base body 110 and may be coupled to the substrate portion 300.

Referring to FIGS. 3 and 5, the pressure generating body 410 may have a fastening hole 411 formed in the shape of a hole, and a protrusion 301 formed on the substrate 300 may have a fastening hole 411. You can pass. This has the effect of stably fixing the position of the pressure generating body 410 on the substrate 300.

A plurality of fastening hole portions 411 formed in the pressure generating body 410 may be provided, and may be arranged symmetrically with respect to the origin with respect to the center of the pressure generating body 410.

By being connected to the substrate portion 300 at a plurality of points based on the center of the pressure generating body 410, the pressure generating body 410 can be prevented from shaking on the substrate portion 300 and can be stably fixed in position. You can.

Referring to FIG. 5, an inlet hole portion 412 and an discharge hole portion 413 may be formed in the pressure generating body 410 according to an embodiment of the present invention, respectively. The inlet hole portion 412 is in communication with the supply pipe 201 formed in the reservoir unit 200, and the chemical solution (D) can flow into the pressure generating body 410 through the inlet hole portion 412.

Referring to FIGS. 3 and 5, the discharge hole portion 413 formed in the pressure generating body 410 is in communication with the valve portion 500, which will be described later, and passes through the flow path formed in the pressure generating main body 410. The chemical solution (D) is discharged and may flow into the valve unit 500.

Referring to FIGS. 5 and 6, a first flow path portion 414 and a second flow path portion 415 may be formed in the pressure generating body 410 according to an embodiment of the present invention. The first passage portion 414 and the second passage portion 415 communicate with the inlet hole portion 412 and the discharge hole portion 413 formed in the pressure generating body 410, and the inlet hole portion 412 and the discharge hole portion 413 ) can be formed between.

The first flow path portion 414 and the second flow path portion 415 according to an embodiment of the present invention may be in communication, and may each be provided in plural numbers. The first flow path portion 414 and the second flow path portion 415 may be arranged to sequentially communicate with each other.

Referring to Figures 5 and 6, the first flow path portion 414 forms a flow path for the chemical solution (D) flowing into the pressure generating body 410 through the inlet hole portion 412, and may be provided in plural pieces. there is. The first passage portion 414 extends along a preset direction (up and down direction based on FIG. 6), and a plurality of first passage portions 414 may be arranged side by side. A partition wall 416 may be disposed between the plurality of first flow passage parts 414.

The cross-sectional area of the first passage portion 414 formed in the pressure generating body 410 according to an embodiment of the present invention is relatively smaller than the cross-sectional area of the second passage portion 415 communicating with the first passage portion 414. can be formed.

Referring to FIGS. 5 and 6, a plurality of first passage portions 414 according to an embodiment of the present invention may be provided, and the sum of the cross-sectional areas of the plurality of first passage portions 414 may be formed as a single It may be formed to be larger than the cross-sectional area of the second flow path portion 415.

Referring to Figure 6, on both sides of the first flow path portion 414 according to an embodiment of the present invention, electrode portions 430 having different polarities, specifically a first electrode 430a and a second electrode 430b. Each of these can be arranged.

Referring to FIG. 6, when the electrode unit 430 receives a voltage from the power supply unit 700, an electric field EF may be formed on the first passage unit 414 and is accommodated in the first passage unit 414. The chemical solution D may flow in the direction of the electric field EF, that is, from the first electrode 430a to the second electrode 430b.

That is, the first electrode 430a and the second electrode 430b may have different polarities. In this specification, the first electrode 430a may be formed as a positive electrode, and the second electrode 430b may be formed as a negative electrode.

Before the electrode unit 430 according to an embodiment of the present invention receives voltage from the power supply unit 700, the chemical solution (D) contained in the pressure generator 400 does not move, and the electrode unit 430 applies the voltage. As the applied electric field (EF) is formed, the chemical solution (D) accommodated in the first flow path portion 414 has a preset speed, and pressure can be generated accordingly.

Referring to FIG. 6, the second flow path portion 415 formed in the pressure generating unit 400 is in communication with the first flow path portion 414 and can provide a flow path for the chemical solution D. A plurality of second flow passage parts 415 may be provided, and a plurality of second flow passage parts 415 may be disposed at the inlet end and the discharge end of the first flow passage part 414, respectively.

Referring to FIG. 6, the chemical solution (D) contained in the second flow path portion 415 is, like the first flow path portion 414, an electrode portion 430 that receives a voltage from the power supply portion 700, specifically the first flow path portion 414. The chemical solution (D) does not flow due to the electric field (EF) formed by the electrode 430a and the second electrode 430b, but moves to the first flow path portion of the next step due to the pressure generated in the first flow path portion 414. The chemical solution (D) can flow up to (414).

In other words, a plurality of first passage portions 414 and second passage portions 415 according to an embodiment of the present invention are provided, and the first passage portion 414 on which electrode portions 430 are disposed on both sides The process by which the passed chemical solution (D) enters the second flow path portion 415 can be defined as a 'single step'.

The plurality of first passage portions 414, second passage portions 415, and electrode portions 430 are sequentially arranged, and a plurality of single steps are connected to form ‘multiple steps’. there is.

Pressure can be generated in the chemical solution (D) while passing through the first passage portion 414 formed in a single stage, and passing through the second passage portion 415 again provided in another single stage ( 414), the pressure may increase.

The pressure generator 400 according to an embodiment of the present invention has the effect of generating a target pressure depending on how many single steps a multiple step consists of.

As an optional embodiment, the sum of the cross-sectional areas of the plurality of first passage portions 414 may be relatively larger than the cross-sectional area of the second passage portions 415.

In this case, according to Bernoulli's law, the flow rate of the chemical solution (D) in the second flow path portion 415 increases compared to the flow rate of the chemical solution (D) passing through the plurality of first flow path portions 414, and the first flow path portion 415 increases. The chemical solution (D) may flow on the second flow path portion 415 due to the pressure generated while passing through the portion 414.

The pressure generated in the pressure generator 400 can be transmitted to the valve portion 500, which will be explained later, and the chemical solution (D) discharged from the pressure generator 400 is connected to the valve portion 500 and the needle assembly 600. It can be injected into the user's body (HB).

Referring to FIGS. 5 and 6 , the flow directions of the chemical solution D within the first flow path portion 414 and the second flow path portion 415 may be formed differently. Specifically, the flow direction of the chemical liquid within the first flow path portion 414 and the second flow path portion 415 may be formed in opposite directions.

As a result, a plurality of single stages can be arranged in parallel with each other, and the volume occupied by the pressure generator 400 inside the base body 110 can be reduced compared to a case where a plurality of single stages are arranged in series.

Referring to FIG. 6, when the electrode unit 430 receives voltage in a state in which no flow of the chemical solution (D) occurs, the chemical solution (D) flows due to the generated electric field (EF) and a speed is generated. do.

Then, when entering the first flow path part 414 disposed in the next step through the second flow path portion 415, the chemical solution follows the direction of the electric field (EF) formed by the electrode portion 430 disposed in the step. (D) flows, and the flow speed of the chemical solution (D) can increase, which has the effect of increasing the pressure.

Referring to FIG. 5, the chemical solution (D) that has gone through a plurality of single stages is discharged to the outside of the pressure generator 400 through the discharge hole portion 413 in communication with the first flow path portion 414 or the second flow path portion 415. can be discharged as

Referring to FIGS. 5 and 6, the electrode unit 430 according to an embodiment of the present invention is disposed in the pressure generating body 410, and the placement hole portion (reference numeral not set) is formed in the pressure generating main body 410. ) can be inserted.

Referring to FIG. 6, the electrode unit 430 includes a plurality of electrodes, specifically a first electrode 430a and a second electrode 430b, and the first electrode 430a and the second electrode 430b are connected to each other. Can have different polarities. In this specification, the first electrode 430a may be formed as an anode, and the second electrode 430b may be formed as a cathode.

Referring to FIG. 6, the electrode portion 430, specifically the first electrode 430a and the second electrode 430b, may be disposed on both sides of the first passage portion 414, and the chemical solution D flows therein. The first electrode 430a may be disposed on the side of the area where the chemical solution D is discharged through the first passage portion 414, and the second electrode 430b may be disposed on the side of the area where the chemical solution D is discharged through the first flow path 414.

The electrode unit 430 may be electrically connected to the power supply unit 700 and may receive voltage from the power supply unit 700 to form an electric field EF. Specifically, as the electric field (EF) is formed between the first electrode (430a) and the second electrode (430b), the chemical solution (D) is preset along the first passage portion 414 that overlaps the electric field (EF). There is an effect of being able to flow in the direction of the electric field (EF).

Figure 7 is a perspective view showing the pressure generator 400' according to another embodiment of the present invention. Referring to Figure 7, the pressure generating unit 400' may include a pressure generating body 410' and an electrode unit 430'. The electrode portion 430` may include a first electrode 430`a and a second electrode 430`b, and may be provided in plural pieces.

The pressure generator 400' according to another embodiment of the present invention includes electrode parts 430' disposed on both sides of the first flow path part 414', specifically the first electrode 430'a and the second electrode. Except that (430'b) is each disposed as a single electrode, the configuration, operating principle, and effect of increasing the pressure as the chemical solution (D) flowing through the pressure generator (400') flows are the same as those of the present invention. Since it is the same as the pressure generating unit 400 according to one embodiment, detailed description will be omitted to the extent of overlap.

Referring to FIGS. 2, 3, 6, and 7, the valve unit 500 according to an embodiment of the present invention is disposed between the pressure generating unit 400 and the needle assembly 600, and is preset. A sufficient amount of chemical solution (D) can be supplied to the needle assembly 600.

The valve unit 500 according to an embodiment of the present invention may include a valve body 510 and a deformation unit 530. The valve body 510 provides a flow path so that the chemical solution (D) flowing in from the pressure generator 400 can flow, and a first valve flow path 511 and a second valve flow path 513 can be formed. .

Specifically, the first valve passage 511 is connected to the pressure generator 400 and provides an inflow path for the chemical liquid (D), and the second valve passage 513 is connected to the needle assembly 600 and provides an inflow path for the chemical liquid (D). The purpose is to provide an emission route for .

The first valve passage 511 and the second valve passage 513 have a hollow interior and may be formed in a tube shape. Chemical liquid (D) with pressure can flow from the pressure generator 400 through the first valve passage 511 and the second valve passage 513, and can be smoothly supplied back to the needle assembly 600. It works.

Referring to FIG. 8, the deformable portion 530 according to an embodiment of the present invention is connected to the valve body 510, and can form a chemical liquid (D) receiving space (DS) together with the valve body 510. there is.

Referring to FIG. 8, the chemical liquid (D) accommodating space refers to an internal space surrounded by one side of the valve body 510 facing the deformable part 530 and the inner peripheral surface of the deformable part 530, and the chemical liquid (D) This can be accepted.

As the shape of the deformation part 530 is modified, the volume of the chemical liquid (D) receiving space (DS) changes, and the volume of the chemical liquid (D) receiving space (DS), that is, the amount of chemical liquid (D), is preset. When the amount is reached, the chemical solution (D) can be supplied to the needle assembly 600 through the second valve passage 513 by the pressure generated from the pressure generator 400.

Referring to FIG. 8, the volume (V) that can be accommodated in the chemical solution (D) accommodation space (DS) according to an embodiment of the present invention can be derived through the following process.

Referring to FIG. 8, when the radius of the deformed part 530 is a, the height change w(r) of the deformed part 530 due to deformation at a position where the distance from the center of the deformed part 530 is r, and The moment of inertia D is as follows:

The volume (V) of the chemical solution (D) receiving space (DS) is as follows.

Finally, the volume (V) of the chemical solution (D) that can be accommodated in the chemical solution (D) receiving space (DS) is as follows.

In the above equations, E is the elastic modulus, v is the Poisson ratio, h is the thickness of the deformed part 530, r is the distance from the center of the deformed part 530, and P is pressure generation. The pressure received from the unit 400 and applied to the valve unit 500, specifically the deformable part 530, a denotes the radius of the deformed part 530.

Referring to FIG. 10, the volume of the chemical liquid (D) in the chemical liquid (D) receiving space (DS) may be defined as a function of the pressure transmitted from the pressure generator 400, and is deformed when a preset volume is reached. Because the shape of the portion 530 is modified to move toward the valve body 510, the chemical solution D can be effectively delivered to the needle assembly 600.

In other words, the chemical solution (D) at a preset cycle and a fixed amount must be injected into the user's body through the chemical injection device 10, and the pressure generated by the pressure generator 400 is used to inject the drug solution (D) into the user's body. When the amount of the drug solution (D) accommodated in the drug solution (D) receiving space (DS) reaches a preset amount, the drug solution (D) will be stably and repeatedly delivered to the user's body through the needle assembly 600. There is a possible effect.

Referring to FIG. 3, the needle assembly 600 according to an embodiment of the present invention is capable of receiving the chemical solution (D) from the pressure generating unit 400 and discharging it to the outside, and includes a cannula (CN) and a needle unit (ND). , may include a shaft portion 610, an insertion portion 630, and an extraction portion.

The needle assembly 600 provides a flow path for the chemical solution (D) delivered from the valve unit 500, and the needle unit (ND) located inside the cannula (CN) contacts the user's body (HB). The chemical solution (D) can be injected into the body.

Referring to FIG. 3, the insertion unit 630 and the extraction unit can be relatively rotated based on the longitudinal central axis of the shaft unit 610, and the cannula (CN) and needle unit (ND) can be rotated relative to the user by their relative rotation. It can be contacted or inserted into the body, or extracted after use has been completed.

Referring to FIG. 3, the insertion portion 630 includes a first elastic member 631 having an elastic restoring force in a first direction, and the extraction portion is aligned in the first direction with respect to the longitudinal central axis of the shaft portion 610. It may include a second elastic member 651 having elastic restoring force in a second direction, which is the opposite direction.

Due to the elastic restoring force of the first elastic member 631 and the second elastic member 651, the insertion part 630 and the extraction part rotate relative to each other and the needle part ND can be moved quickly, and the chemical injection device 10 ) Before starting use, a priming step is taken to exhaust the air inside the cannula (CN) and needle part (ND) to the outside, which has the effect of injecting the drug solution (D) directly into the user's body. there is.

Referring to FIG. 9, the power supply unit 700 according to an embodiment of the present invention generates power and may be electrically connected to the pressure generating unit 400. Specifically, the power supply unit 700 may generate power and apply power to the electrode unit 430, thereby forming an electric field EF.

An electric field (EF) is formed between the electrode portions 430 disposed on both sides of the first flow path portion 414 formed in the pressure generating body 410, specifically the first electrode 430a and the second electrode 430b. Due to this, the fluid can flow in a preset direction and generate pressure, and this pressure generation process is a single step formed by the first flow path portion 414, the second flow path portion 415, and the electrode portion 430. There is an effect of generating a target pressure in the pressure generator 400 by going through the process multiple times.

Although not shown in the drawing, the power supply unit 700 is electrically connected to the sensor unit 810, which will be described later, and can supply power to the sensor unit 810.

Referring to FIG. 9, the sensor unit 810 according to an embodiment of the present invention is connected to the valve unit 500 and can sense the flow rate of the chemical solution (D) flowing into the valve unit 500. . The sensor unit 810 can transmit information about the flow rate of the chemical solution (D) to the control unit 850 as an electrical signal, and the control unit 850 can control the operation of the pressure generator 400.

That is, the control unit 850 sends an electrical signal to the pressure generator 400 to generate the required pressure to reach the target volume of the chemical solution (D) receiving space (DS) of the valve unit 500. There is an effect of controlling the operation of the pressure generator 400 by transmitting.

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 reservoir unit containing a chemical solution;

a pressure generator connected to the reservoir unit and providing a flow path for the chemical solution supplied from the reservoir unit; and

It includes a needle assembly capable of receiving the chemical solution from the pressure generator and discharging it to the outside,

The pressure generator is a chemical injection device characterized in that it increases the pressure of the chemical liquid while it flows along a preset direction.
According to paragraph 1,

A valve portion disposed between the pressure generator and the needle assembly and supplying a preset amount of the chemical solution to the needle assembly.
According to paragraph 2,

A sensor unit connected to the valve unit and configured to sense the flow rate of the chemical liquid flowing into the valve unit.
According to paragraph 3,

A control unit electrically connected to the sensor unit and receiving information about the flow rate of the chemical solution from the sensor unit to control the operation of the pressure generator.
According to paragraph 1,

A power supply unit electrically connected to the pressure generator and supplying power to the pressure generator to form an electric field.
According to paragraph 1,

A chemical injection device further comprising a base portion on which the reservoir unit, the pressure generating portion, and the needle assembly are installed.
According to clause 6,

The needle assembly includes a needle portion that penetrates the base portion and is exposed to the outside.