WO2023132482A1

WO2023132482A1 - Liquid medicine injection device

Info

Publication number: WO2023132482A1
Application number: PCT/KR2022/019327
Authority: WO
Inventors: 재진 김제시; 노현덕; 오동국; 조경서
Original assignee: 이오플로우㈜
Priority date: 2022-01-04
Filing date: 2022-12-01
Publication date: 2023-07-13

Abstract

The present invention provides a liquid medicine injection device comprising: a base body; a needle assembly mounted in the base body; a reservoir unit which is fluidically connected to the needle assembly, and which has a plunger therein; a driving unit for linearly moving the plunger; and an encoder unit including a rotary body unit, which is connected to the driving unit and rotates therewith, and measuring the rotation of the driving unit.

Description

liquid injection device

The present invention relates to a device for injecting a liquid medicine.

In general, a drug solution injection device such as an insulin injection device is used to inject a drug solution into a patient's body. Such a liquid injection device is also used by professional medical personnel such as doctors and nurses, but in most cases, it is used by ordinary people such as patients themselves or their guardians.

In the case of a diabetic patient, especially a pediatric diabetic patient, it is necessary to inject a drug solution such as insulin into the human body at regular intervals. A drug injection device in the form of a patch attached to the human body for a certain period of time is being developed, and this drug injection device can be used while being attached to the body such as the abdomen or waist of a patient for a certain period of time.

In order to increase the effect through drug injection, the drug injection device needs to control the precise injection of the drug into the patient's body, and it is important to precisely inject a small amount of the drug through the small drug injection device.

When attached to the human body, the drug injection device needs to be comfortable to wear, convenient to use, durable, and driven with low power. In particular, since the drug injection device is used by being directly attached to the patient's skin, it is important for the user to drive the drug injection device conveniently and safely.

Conventionally, the driving of a driving module that provides power so that a drug solution can be injected has been measured and controlled. There was difficulty in measuring the movement, and due to this, there was a problem in not knowing whether power was properly transmitted to the driving unit.

The present invention provides a drug solution injection device capable of accurately sensing the driving of a driving unit and accurately delivering a drug.

One aspect of the present invention, the base body; A needle assembly mounted on the base body; a reservoir unit fluidly connected to the needle assembly and having a plunger therein; a drive unit for linearly moving the plunger; It provides a chemical solution injection device comprising a; and an encoder unit for measuring the rotation of the drive unit; and a rotating body connected to the drive unit and rotatable together.

In addition, the encoder unit includes a first conducting wire; The rotating main body portion provided with a second conducting wire portion; a first encoder contact end connected to contact the first conducting wire; and a second encoder contact end capable of selectively contacting the second conducting wire according to rotation of the driving unit.

In addition, the first conducting wire portion is formed extending along the circumferential direction with respect to the central axis of rotation of the rotating body portion on one surface of the rotating body portion, and a plurality of second conducting wire portions are provided, and the circumferential direction is provided on the other surface of the rotating body portion. It may be spaced apart at predetermined intervals according to the arrangement.

In addition, the first encoder contact end and the second encoder contact end may have elasticity.

In addition, the first encoder contact end and the second encoder contact end may be formed with a bent portion in which each end of the rotary body part is bent at least once.

The chemical solution injection device according to an embodiment of the present invention has an effect of confirming whether the device is normally driven and whether or not the driving unit operates once.

In addition, there is an effect of accurately measuring whether or not the driving unit rotating by receiving power from the driving module has rotated only within a preset range.

In addition, the encoder unit may accurately measure rotational data of the drive wheel unit to sense whether the chemical solution injection device is normally driven.

In addition, in relation to the operation of the driving unit, there are effects that can be identified in detail, such as forward rotation, reverse rotation, and non-rotation.

In addition, there is an effect of detecting whether or not occlusion occurs in the reservoir unit by calculating the contact time between the lead part and the encoder contact end.

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

2 is a perspective view showing a chemical solution injection device according to an embodiment of the present invention.

3 is an exploded perspective view illustrating a state in which a housing is opened in a liquid injection device according to an embodiment of the present invention.

FIG. 4 is a perspective view showing some configurations of FIG. 3 .

5 is a perspective view illustrating a driving wheel unit and an encoder unit according to an embodiment of the present invention.

6 is a plan view illustrating a plunger, a connector member, a driving module, and a driving unit according to an embodiment of the present invention.

Fig. 7 is a block diagram showing some configurations of the chemical solution injection device of Fig. 2;

8 is a cross-sectional view showing a state before a chemical liquid is stored in a reservoir unit according to an embodiment of the present invention.

9 is a cross-sectional view illustrating a state in which a liquid medicine is stored in a reservoir unit according to an embodiment of the present invention.

10 is a plan view illustrating a driving wheel unit and an encoder unit according to another embodiment of the present invention.

11 is a view showing a state in which a driving wheel unit and an encoder unit according to another embodiment of the present invention are viewed from one side.

FIG. 12 is a view showing a state in which a driving wheel unit and an encoder unit according to another embodiment of the present invention are viewed from the other side opposite to one side of FIG. 11 .

13 is a plan view illustrating a driving wheel unit and an encoder unit according to another embodiment of the present invention.

14 is a view showing a state in which a driving wheel unit and an encoder unit according to another embodiment of the present invention are viewed from one side.

FIG. 15 is a view showing a state in which a drive wheel unit and an encoder unit according to another embodiment of the present invention are viewed from the other side opposite to one side of FIG. 11 .

16A and 16B are diagrams illustrating a second conducting wire according to still other embodiments of the present invention.

Since the present invention can apply various transformations and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. Effects and features of the present invention, and methods for achieving them will become clear with reference to the embodiments described later in detail together 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, and when describing with reference to the drawings, the same or corresponding components are assigned the same reference numerals, and overlapping descriptions thereof will be omitted. .

In the following examples, expressions in the singular number include plural expressions unless the context clearly dictates otherwise.

In the following embodiments, terms such as include or have mean that features or components described in the specification exist, and do not preclude the possibility that one or more other features or components may be added.

When an embodiment is otherwise implementable, a specific process sequence may be performed differently from the described sequence. For example, two processes described in succession may be performed substantially simultaneously, or may be performed in an order reverse to the order described.

In the drawings, the size of components may be exaggerated or reduced for convenience of description. For example, since the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, the following embodiments are not necessarily limited to those shown.

Referring to FIG. 1 , a drug solution injection system according to an embodiment of the present invention may include a drug solution injection device, a user terminal, a controller, and a biometric information sensor. In the drug injection system, a user can drive and control the system using a user terminal, and the drug injection device can periodically inject the drug based on blood sugar information monitored by a biometric information sensor.

Referring to FIG. 1 , the drug solution injection device 1 is a drug to be injected into a user based on data sensed by the biometric sensor 40, for example, insulin, glucagon, anesthetic analgesic, dopamine, growth hormone, It also performs the function of injecting drugs such as smoking cessation aids.

In addition, the chemical solution injection device 1 may transmit a device status message including information on the remaining battery 350 capacity of the device, whether or not booting of the device was successful, and whether or not the injection of the chemical solution D was successful to the controller 30. .

Messages delivered to the controller 30 may be delivered to the user terminal 20 via the controller 30 . Alternatively, the controller 30 may transmit improved data made by processing received messages to the user terminal 20 .

The drug solution injection device 1 according to an embodiment of the present invention is provided separately from the biometric information sensor 40 and may be installed to be spaced apart from the object to be used.

As an optional embodiment, the drug injection device 1 and the biometric information sensor 40 may be provided in one device.

As an optional embodiment, the drug solution injection device 1 may be mounted on a user's body. In addition, the drug solution injection device 1 may be mounted on animals as well as humans to inject the drug solution D.

The user terminal 20 may input and receive input signals from the user in order to drive and control the drug solution injection system 1 . The user terminal 20 may generate a signal for driving the controller 30 to control the controller 30 and may control the controller 30 to drive the drug injection device 1 .

In addition, the user terminal 20 may display biometric information measured by the biometric information sensor 40 and state information of the liquid injection device 1 .

The user terminal 20 refers to a communication terminal usable in a wired/wireless communication environment. For example, the user terminal 20 may include a smart phone, 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 reader, It may be a terminal for digital broadcasting, a navigation device, a kiosk, an MP3 player, a digital camera, a home appliance, a device equipped with a camera, and other mobile or non-mobile computing devices. In addition, the user terminal 20 may be a wearable device having a communication function and data processing function, such as a watch, glasses, a hair band, and a ring. However, as described above, a terminal equipped with an application capable of internet communication may be borrowed without limitation.

The user terminal 20 may 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 drug solution injection device 1, and the user terminal 20 may be provided to the subject or a third party. Since the user terminal 20 is driven by the guardian, the safety of the drug injection system 1 can be increased.

In another embodiment, the user terminal 20 and the controller 30 may be provided as a single device. The controller 30 provided as one with the user terminal 20 communicates with the drug injection device 1 to control the injection of the drug.

The controller 30 performs a function of transmitting and receiving data to and from the drug solution injection device 1, transmits a control signal related to injection of drugs such as insulin to the drug solution injection device 1, and transmits blood sugar from the biometric information sensor 40. It is possible to receive a control signal related to the measurement of a biometric value such as the like.

In one embodiment, the controller 30 may transmit an instruction request to measure the current state of the user to the drug injection device 1 and receive measurement data from the drug injection device 1 in response to the instruction request.

The biometric information sensor 40 may perform a function of measuring biometric values such as a user's blood sugar level, blood pressure, heart rate, etc. according to a purpose. Data measured by the biometric information sensor 40 may be transmitted to the controller 30, and a drug cycle and/or injection amount 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 example, the biometric information sensor 40 may be a sensor that measures a blood sugar level of an object. It may be a continuous glucose monitoring (CGM) sensor. A continuous blood glucose measurement sensor may be attached to a subject to continuously monitor a blood glucose level.

The user terminal 20 , the controller 30 and the drug injection device 1 may perform communication using a network. For example, the network may include a Local Area Network (LAN), a Wide Area Network (WAN), a Value Added Network (VAN), a mobile radio communication network, a satellite communication network, and any of these It is a comprehensive data communication network that includes mutual combinations and allows each network constituent entity to communicate smoothly with each other, and may include wired Internet, wireless Internet, and mobile wireless communication network. In addition, wireless communication includes, for example, wireless LAN (Wi-Fi), Bluetooth, Bluetooth low energy (Bluetooth low energy), Zigbee, WFD (Wi-Fi Direct), UWB (ultra-wideband), infrared communication (IrDA, Infrared Data Association), NFC (Near Field Communication), 5G, etc. may be included, but are not limited thereto.

2 is a perspective view showing a chemical solution injection device according to an embodiment of the present invention. 3 is an exploded perspective view illustrating a state in which a housing is opened in a liquid injection device according to an embodiment of the present invention. FIG. 4 is a perspective view showing some configurations of FIG. 3 . 5 is a perspective view illustrating a driving wheel unit and an encoder unit according to an embodiment of the present invention. 6 is a plan view illustrating a plunger, a connector member, a driving module, and a driving unit according to an embodiment of the present invention. Fig. 7 is a block diagram showing some configurations of the chemical solution injection device of Fig. 2; 8 is a cross-sectional view showing a state before a chemical liquid is stored in a reservoir unit according to an embodiment of the present invention. 9 is a cross-sectional view illustrating a state in which a liquid medicine is stored in a reservoir unit according to an embodiment of the present invention.

2 to 4 , the drug solution injection device 1 according to an embodiment of the present invention may be attached to a user to inject the drug solution D, and the drug solution D stored therein may be preset to the user. It can be injected in quantity.

The drug solution injection device 1 may be used for various purposes depending on the type of the injected drug solution D. For example, the drug solution (D) may include an insulin-based drug solution (D) for diabetics, other drug solutions (D) for the pancreas, a drug solution (D) for the heart, and other various types of drug solutions (D). there is.

The drug solution injection device 1 according to an embodiment of the present invention may include a housing 11, an attachment part 12, and a base body.

2 to 4, the housing 11 according to an embodiment of the present invention includes a needle assembly 100, a reservoir unit 200, a driving module 300, a driving unit 400 to be described later, An accommodation space may be formed inside by covering the needle driving unit 600, the alarm unit 800, and the sensor unit.

Referring to FIGS. 2 to 4 , the attachment part 12 according to an embodiment of the present invention may be positioned adjacent to the user's skin. A separate bonding means may be further interposed between the attachment part 12 and the user's skin, and the drug solution injection device 1 may be fixed to the skin by the bonding means.

Referring to FIGS. 3 and 4 , the chemical solution injection device 1 according to an embodiment of the present invention may include a base body (reference numerals are not set).

The base body may form a frame supporting internal parts through at least one body. Specifically, the base body may include a first body 13, a second body 14, a third body 15, and a body cover 16, and the first body 13 and the second body 14 , the third body 15, the body cover 16 can be distinguished according to the arrangement.

The first body 13 is disposed below the housing 11, and the needle assembly 100, the reservoir unit 200, the driving module 300, the battery 350, etc. may be supported in each opening or groove. there is. The second body 14 is disposed on the lower side of the first body 13 (refer to FIG. 3 ), may be connected to the attachment part 12, and may cover the lower part of the liquid injection device 1.

The third body 15 is disposed above the first body 13, and the reservoir unit 200, the driving module 300, the battery 350, the driving unit 400, etc. are supported in each opening or groove. It can be. The body cover 16 is disposed on the upper side of the third body 15 and may cover the third body 15 .

Specifically, the body cover 16 may be fastened to the third body 15 by fastening members such as bolts, and may cover the wing ends 421 and the driving module 300 of the driving wheel unit 420 to be described later. there is.

Referring to FIG. 3, the drawing shows a first body 13, a second body 14, a third body 15, and a body cover 16, but is not limited thereto, and may be integrally provided. Various modifications are possible.

Referring to FIG. 7 , the drug injection device 1 according to an embodiment of the present invention may include a control module 17, and the control module 17 may be disposed inside the drug injection device 1. there is.

Specifically, the control module 17 as a circuit board may be disposed under the second body 14 and may control the overall driving of the liquid injection device 1 . An encoder contact terminal 935 to be described later may be disposed on the circuit board.

The control module 17 according to an embodiment of the present invention may electrically contact the driving module 300, the battery 350, the alarm unit 800, and the sensor unit to control their driving.

Referring to Figures 3, 4 and 5, the needle assembly 100 according to an embodiment of the present invention can be mounted on the base body, specifically the first body (13). In the needle assembly 100, the needle (N) and/or the cannula may be moved in the axial direction by rotation of the sleeve (reference numeral not set).

One end of the needle (N) may be connected to the reservoir unit 200 to deliver the drug solution (D), and the other end may be inserted into the cannula and moved along the cannula. Since the cannula has a hollow conduit shape to accommodate the needle (N) therein, the drug solution (D) discharged from the needle (N) can be injected into the user.

The cannula remains inserted into the user's skin, but the needle N rises inside the cannula, that is, moves in a direction away from the user's skin and is separated from the object.

However, the cannula and the needle (N) form a path through which fluid is moved, so that the drug solution (D) injected from the reservoir may be injected into the user through the needle (N) and the cannula.

Referring to FIGS. 3 and 4 , the needle assembly 100 according to an embodiment of the present invention may receive power from the needle driving unit 600 to move the needle N and/or the cannula.

The needle drive unit 600 according to an embodiment of the present invention may transmit power to the needle assembly 100 in a pressing manner, and may include an elastic member having an elastic restoring force.

Due to this, when the user applies force to the needle driving unit 600, power is transmitted to the needle assembly 100 connected to the needle driving unit 600, and the needle N and / or cannula are inserted into the user's skin, and the user When the force applied to the needle driving unit 600 is removed, the needle driving unit 600 is moved to its original position by the elastic restoring force of the elastic member, and only the needle N can be separated from the user's skin.

The needle drive unit 600 according to an embodiment of the present invention is formed in a pressing manner, but is not limited thereto, and various modifications are possible, such as generating power from a separate motor and transmitting power to the needle assembly 100 .

3, 4, 8, and 9, the reservoir unit 200 according to an embodiment of the present invention is mounted on the first body 13 and the third body 15, and the needle assembly ( 100) can be connected. The reservoir unit 200 is fluidly connected to the needle assembly 100, and the chemical solution D may be stored in the internal space.

3, 4, 8, and 9, the reservoir unit 200 according to an embodiment of the present invention includes a reservoir body 210, a cap cover 220, a plunger 230, and a connector member. (250). The reservoir body 210 has a hollow interior, and the chemical solution D may be stored therein.

The reservoir body 210 may be connected to the needle assembly 100, specifically the needle N and/or the cannula, and allow the drug solution D to flow through the needle N and/or the cannula. .

The reservoir body 210 may extend to a preset length in the longitudinal direction and store the chemical solution D in the internal space. A plunger 230 may be movably disposed inside the reservoir body 210, and the chemical solution D may be discharged through the needle N by the movement of the plunger 230.

Referring to FIGS. 8 and 9 , a cap cover 220 may be mounted at an end (right end of FIG. 8 ) of the reservoir body 210 . The cap cover 220 covers the reservoir body 210, and through an opening (not shown) formed in the cap cover 220, a rod part 410 and/or a connecting member 430, which will be described later, are provided. can move

The reservoir body 210 according to an embodiment of the present invention may have an inlet end and an outlet end. The chemical solution (D) is injected into the inlet end, the needle (N) is installed at the outlet end, and the chemical solution (D) can be discharged through the needle (N).

The plunger 230 is disposed inside the reservoir body 210 and can move linearly (left and right directions based on FIG. 8) by driving the driving module 300 and the driving unit 400. As the plunger 230 advances, the chemical solution D may be discharged from the inner space to the needle N.

The outer circumferential shape of the plunger 230 may be formed identically to the inner circumferential shape of the facing reservoir body 210 . Due to this, the plunger 230 may come into close contact with the inner circumferential surface of the reservoir body 210 .

The plunger 230 may be connected to the connector member 250 extending backward.

4, 8, and 9, the connector member 250 extends in the longitudinal direction and is connected to the plunger 230, one side of which is located inside the reservoir body 210, and the other side of the reservoir. It may be located outside the main body 210 .

The connector member 250 is connected to the plunger 230 and may linearly move along with the linear movement of the plunger 230 .

The connector member 250 may be made of a material having electrical conductivity and may have a shaft shape. While the connector member 250 moves, it is possible to make contact with the reservoir sensor unit 910 to be described later.

Referring to FIG. 4 , by contacting the reservoir sensor unit 910 while moving the connector member, the storage amount of the drug may be measured or the drug injection device 1 may be started to operate.

Referring to FIG. 4, it is shown that the connector member 250 has a shaft shape, but is not limited thereto, and moves with the plunger 230 and contacts the reservoir unit to generate an electrical signal. Various modifications are possible.

When the chemical liquid D is stored in the reservoir body 210 and the plunger 230 retracts, the connector member 250 may retract together with the plunger 230 . In addition, when the plunger 230 moves forward so that the chemical liquid D is discharged from the reservoir to the needle N, the connector member 250 may move forward together with the plunger 230 .

Referring to FIGS. 8 and 9 , the plunger 230 according to an embodiment of the present invention may include a sealing ring (reference numeral not set) at a portion in contact with the inner wall of the reservoir body 210 . Accordingly, when the plunger 230 moves inside the reservoir body 210, leakage of the chemical solution D can be prevented.

Referring to FIGS. 3 , 4 and 6 , the driving module 300 according to an embodiment of the present invention may generate driving force and transmit the driving force to the driving unit 400 . The driving force transmitted to the drive unit 400 causes the plunger 230 to linearly move inside the reservoir body 210, and as the plunger 230 moves linearly, the chemical solution D is supplied to the reservoir unit 200. can be discharged to the outside.

Referring to FIG. 6 , a driving module 300 according to an embodiment of the present invention may include a driving source unit 310 and a power transmission unit 330 . The drive source unit 310 generates power, and the power transmission unit 330 is disposed between the drive source unit 310 and the drive unit 400, specifically, the drive wheel unit 420 to generate power from the drive source unit 310. Power is transmitted to the power transmission unit 330 .

Referring to FIG. 6 , power generated by the driving source unit 310 may be transmitted to the driving unit 400 , specifically the driving wheel unit 420 through the power transmission unit 330 . The power transmission unit 330 according to an embodiment of the present invention may transmit power to the driving wheel unit 420 to rotate the driving wheel unit 420 .

Referring to FIG. 6 , rotation of the driving wheel unit 420 according to an embodiment of the present invention causes the rod unit 410 to move linearly so that the plunger 230 can move linearly inside the reservoir body 210 . As the plunger 230 linearly moves, the connector member 250 connected to the plunger 230 may also linearly move.

The driving module 300 may be any type of device having a suction power of the chemical solution D and a discharge power of the chemical solution D by electricity. In the present invention, the driving module 300 may be a motor that converts electrical energy into mechanical energy. Rotational power generated in the driving module 300 , specifically, the driving source unit 310 may be transmitted to the driving wheel unit 420 through the power transmission unit 330 .

The power transmission unit 330 and the driving wheel unit 420 can contact each other in a gear manner, and the driving wheel unit 420 rotates due to power generated from the driving source unit 310 to move the plunger 230. .

In the present invention, the driving module 300 is formed by an electric motor, but is not limited thereto, and all types of pumps such as mechanical displacement micropumps and electromagnetic motion micropumps can be used.

The mechanical displacement type micropump is a pump that uses the movement of solids or fluids such as gears or diagrams to create a pressure difference to induce fluid flow. Diaphragm displacement pumps, fluid displacement pumps ), and rotary pumps.

An electrokinetic micropump is a pump that uses energy in the form of electricity or magnetism directly to move a fluid, and includes an electrohydrodynamic pump (EHD), an electroosmotic pump, and a magnetohydrodynamic pump ( Magneto hydrodynamic pump) and Electro wetting pump.

Referring to FIGS. 3 and 4 , the battery 350 according to an embodiment of the present invention may supply electricity to the liquid injection device 1 to activate each component.

Although the drawing shows a pair of batteries 350, it is not limited thereto, and may be variously set according to the capacity, use range, use time, etc. of the chemical solution injection device 1.

The battery 350 according to an embodiment of the present invention may be disposed adjacent to the driving module 300 and the driving unit 400 and may supply electricity to the driving module 300 .

In addition, the battery 350 is connected to the control module 17, and based on the electrical signal measured by the sensor unit, the rotation number or rotation speed of the drive unit 400, the reservoir unit 200, specifically the reservoir body Data on the amount of chemical liquid stored in 210 and the amount of liquid injected to the user can be measured.

Referring to FIGS. 3, 4, 6, 8, and 9 , the drive unit 400 according to an embodiment of the present invention may linearly move the plunger 230 by receiving external power.

The driving unit 400 according to an embodiment of the present invention is installed between the driving module 300 and the reservoir unit 200, and the driving force generated by the driving module 300 is applied to the inside of the reservoir body 210. The disposed plunger 230 may be moved.

8 and 9, the driving unit 400 according to an embodiment of the present invention may include a rod part 410, a driving wheel part 420, a connecting member 430, and a force member 440. there is.

Referring to FIGS. 8 and 9 , the rod part 410 is connected to the plunger 230 and may extend in one direction. The rod part 410 is inserted into the opening of the cap cover 220, and the rod part 410 moves the plunger 230 in the longitudinal direction (left-right direction in FIG. 9) inside the reservoir body 210. can move along.

The rod part 410 according to an embodiment of the present invention may have a screw thread shape on the surface. A screw groove is formed on an inner circumferential surface of the connecting member 430 facing the surface of the rod portion 410, and the rod portion 410 and the connecting member 430 may be connected in a screw manner.

Although not shown in the drawings, in the connecting member 430 according to an embodiment of the present invention, a flat portion (reference numeral not set) may be formed in a flat shape in a predetermined section along the circumferential direction of the central axis in the longitudinal direction.

Due to the flat portion formed in a predetermined section along the circumferential direction of the connecting member 430, in a state in which the chemical solution D is injected into the reservoir body 210, it is inserted into the driving wheel unit 420 to be described later and moves. This is possible, and in the process of injecting the drug solution D into the user's body, the driving wheel unit 420 receives power from the driving module 300 and rotates together.

That is, since a separate clutch unit for interlocking the driving wheel unit 420 and the connecting member 430 is not required, the structure of the chemical solution injection device 1 is simplified.

Referring to FIGS. 8 and 9 , the biasing member 440 according to an embodiment of the present invention is capable of contacting the connecting member 430 and can apply a force opposite to the direction in which the connecting member 430 moves.

Specifically, the force member 440 is in contact with the outer circumferential surface of the connecting member 430 to generate friction, and can restrict the linear movement of the connecting member 430.

The force member 440 according to an embodiment of the present invention is formed in a ring shape in close contact with the outer circumference of the connection member 430, but is not limited thereto, and is formed of an elastic body in the form of a clip to protect the outside of the connection member 430. can be pressurized.

The urging member 440 may generate frictional force according to the movement of the connecting member 430 while the position is fixed with respect to the linear movement direction of the connecting member 430 .

As an optional embodiment, the biasing member 440 may be formed of an elastic body such as a spring, and has an effect of applying force to the connecting member 430 opposite to the direction in which the connecting member 430 moves.

Referring to FIGS. 8 and 9 , the biasing member 440 disposed in contact with the outer circumferential surface of the connecting member 430 does not generate frictional force when no external force acts on the connecting member 430 .

In contrast, when an external force acts on the connecting member 430, the pressing member 440 may generate a frictional force opposite to the external force acting on the connecting member 430 in response thereto. Due to this, the movement of the connection member 430 can be limited by the force of the force member 440 .

Referring to FIGS. 8 and 9 , in the state of FIG. 8 , the plunger 230 may move backward (from left to right in FIG. 8 ) before injection of the liquid D into the reservoir body 210 is completed.

In the process of injecting the chemical solution D, an impact may be applied to the chemical injection device 1, and when such an external factor acts, the plunger 230 moves backward while gas is introduced into the reservoir body 210. can

The force member 440 according to an embodiment of the present invention limits the movement of the connecting member 430 more than necessary, so that gas is introduced before the injection of the chemical solution D into the reservoir body 210 is completed. It has the effect of preventing this.

After the injection of the chemical solution D is completed, the driving module 300, specifically, the power generated in the driving source unit 310 is transmitted to the driving wheel unit 420 through the power transmission unit 330, and the driving wheel unit 420 can be rotated.

When the driving wheel unit 420 is rotated, the plunger 230 and the rod unit 410 move according to the injection of the chemical solution D, so that the connecting member 430 connected to the rod unit 410 moves the driving wheel unit 420. ) is inserted into the interior of

Referring to FIG. 9 , the connecting member 430 is rotated together in conjunction with the rotation of the drive wheel unit 420 due to the flat portion extending along the longitudinal direction of the connecting member 430, and the connecting member 430 and the screw method The rod part 410 connected to rotates and moves the plunger 230 in the opposite direction to the moving direction when the chemical solution D is injected, and discharges the chemical solution D to the needle N side (left side in FIG. 9). can

Referring to FIG. 6 , the driving wheel unit 420 according to an embodiment of the present invention is connected to the driving module 300 so as to be in contact with it, and can be rotated by driving the driving module 300 . The drive wheel unit 420 shares a central axis in the longitudinal direction with the rod unit 410 and the connecting member 430 and may extend in the longitudinal direction.

Referring to FIGS. 8 and 9 , the driving wheel unit 420 according to an embodiment of the present invention may have a hollow interior so that the connection member 430 can be inserted therein. An inner circumferential surface of the inner space formed along the longitudinal central axis of the driving wheel unit 420 may correspond to a shape of an outer circumferential surface of the connecting member 430 .

An inner circumferential surface of the driving wheel unit 420 according to an embodiment of the present invention can make surface contact with a flat part formed on the connecting member 430 in a predetermined section along the circumference of the inner circumferential surface.

As a result, when the injection of the chemical solution D is completed and the power generated in the driving module 300 is transmitted to the driving wheel unit 420 in a state in which the connecting member 430 is inserted into the driving wheel unit 420, the connecting member 430 ) also has the effect of being able to rotate together with the drive wheel unit 420.

In addition, as the connecting member 430 is rotated together with the drive wheel unit 420, the rod portion 410 connected to the connecting member 430 by a screw method is rotated and the plunger 230 is moved inside the reservoir body 210. can be moved linearly in

Referring to FIGS. 6, 8, and 9 , the driving wheel unit 420 according to an embodiment of the present invention may include wing ends 421 along the longitudinal direction (left-right direction based on FIG. 8).

The wing end 421 may be formed in a gear tooth shape along the circumferential direction based on the central axis in the longitudinal direction and the central axis of rotation of the driving wheel unit 420 . The blade 421 can come into contact with the driving module 300, specifically the power transmission unit 330, and as the power transmission unit 330 receiving power from the driving source 310 rotates, the blade 421 It also rotates and has the effect that the drive wheel unit 420 can be rotated.

Power generated in the drive module 300, specifically the drive source unit 310, is transmitted to the power transmission unit 330, and the power transmission unit 330 is formed in the drive unit 400, specifically the drive wheel unit 420. Power can be transmitted to the blade 421 to be.

Referring to Figure 3, the injection cover 700 according to an embodiment of the present invention can be connected to the reservoir unit 200, specifically the reservoir body 210. The injection cover 700 may be inserted into and connected to an inlet end (reference numeral not set) formed in the reservoir body 210 .

Referring to FIG. 3 , the alarm unit 800 according to an embodiment of the present invention is disposed inside or outside the chemical solution injection device 1, and can notify the user of normal operation or malfunction of the drug solution injection device 1. there is.

The alarm unit 800 according to an embodiment of the present invention is disposed below the housing 11 and connected to the circuit board. The alarm unit 800 may generate a warning sound or generate light to deliver an alarm to an external user.

3 and 4, the sensor unit according to an embodiment of the present invention measures the driving of the drug injection device 1, and may include a reservoir sensor unit 910 and an encoder unit 930. there is.

The sensor units according to an embodiment of the present invention measure the storage amount of the chemical liquid D in the reservoir, whether the drive module 300 is driven, whether the drive unit 400 is driven, and the rotation angle of the drive wheel unit 420. , the movement distance of the plunger 230, etc. can be measured.

Referring to FIG. 4, the reservoir sensor unit 910 according to an embodiment of the present invention measures the storage amount of the chemical liquid D stored in the reservoir unit 200, and the first connector contact end 911 , a second connector contact end 912 may be included.

The first connector contact end 911 and the second connector contact end 912 can measure data by measuring whether or not they are in electrical contact with the connector member 250, and can specifically measure the stored amount of the chemical solution D. .

The position of either end of the first connector contact end 911 or the second connector contact end 912 can be changed by contact with the connector member 250, and when the contact with the connector member 250 is released, the restoring force is affected. You can return to your place by

The first connector contact end 911 and the second connector contact end 912 according to an embodiment of the present invention may have elasticity, and specifically may have an elastic spring shape. The first connector contact end 911 and the second connector contact end 912 may be connected to the control module 17 that is a circuit board.

Referring to FIG. 5 , the reservoir sensor unit 910 may be disposed adjacent to the reservoir unit 200 . The reservoir sensor unit 910 may be disposed on a movement path of the connector member 250 .

The first connector contact end 911 and the second connector contact end 912 may be mounted in fixing grooves (reference numerals not set) of the second body 14 . While the connector member 250 connected to the reservoir unit 200, specifically, the plunger 230 moves, it contacts at least one of the plurality of first connector contact ends 911 and second connector contact ends 912. can do.

The first connector contact end 911 and the second connector contact end 912 are spaced apart from each other, and the connector member 250 linearly moves to the first connector contact end 911 and/or the second connector contact end ( 912) can be contacted.

Referring to FIG. 5, in the process of injecting the chemical liquid D into the reservoir body 210, the connector member 250 first contacts the first connector contact end 911, and then the connector member 250 first contacts the first connector contact end 911. 2 can be in contact with the connector contact end 912.

The connector member 250 according to an embodiment of the present invention may electrically connect the first connector contact end 911 and the second connector contact end 912 . When the first connector contact end 911 and the second connector contact end 912 are electrically connected through the connector member 250, the control module 17 may recognize a specific event of the reservoir unit 200. .

For example, when the connector member 250 comes into contact with the first connector contact end 911 and the second connector contact end 912, the reservoir sensor unit 910 activates the chemical liquid (D) stored in the reservoir body 210. ) is stored as a first reference amount (eg, 10%, 20%, 30%, etc.) may be sensed.

When recognizing that the liquid medicine D is stored in the reservoir body 210 as the set first reference amount, the control module 17 can wake up the medicine liquid injection device 1 (awake function). That is, the control module 17 may confirm that a certain amount of the chemical liquid D is stored in the reservoir body 210, and start partially driving the chemical liquid injection device 1 to preheat.

As an optional embodiment, the control module 17 may transmit an alarm signal to the user according to whether or not the connector member 250 is in contact with the first connector contact end 911 and the second connector contact end 912. Accordingly, the control module 17 forcibly terminates the chemical solution injection device 1, continuously generates an alarm signal to the user terminal 20, reduces the amount of the chemical solution D injected into the user, or increases the injection period. can

3 to 9, the encoder unit 930 according to an embodiment of the present invention measures the rotation of the drive unit 400, the rotating body 931, the encoder contact end 935, the contact A holding part 937 may be included.

Referring to FIG. 4 , the encoder unit 930 according to an embodiment of the present invention may be connected to one end of the drive unit 400, specifically the drive wheel unit 420, and is connected to the reservoir unit 200. When one side of the driving wheel unit 420 is referred to as a front side, the encoder unit 930 may be connected to the rear side of the driving wheel unit 420 .

Referring to FIG. 4 , the encoder unit 930 according to an embodiment of the present invention is connected to the rear side of the wing 421 formed on the drive wheel unit 420, but is not limited thereto, and the wing 421 ) It is possible to carry out various modifications, such as being connected to the front side of.

3 and 4, the rotating body 931 according to an embodiment of the present invention is connected to the driving unit 400, specifically the driving wheel unit 420 and is rotatable together, the driving wheel unit 420 It can be formed in a ring shape so that it can be connected to.

The rotation body 931 according to an embodiment of the present invention may be interlocked with the rotation of the drive wheel unit 420 . The rotation of the rotation body 931 can be viewed as the rotation of the drive wheel unit 420 .

Referring to FIG. 4 , an insertion groove 932 may be formed in the shape of a groove in the rotation body 931 in an inward direction in a predetermined section along the circumferential direction with respect to the rotation center axis.

Referring to FIG. 4 , the protrusion 425 formed in the driving unit 400 may be inserted into the insertion groove 932 formed in the rotating body 931 . The protruding portion 425 may protrude in a radial direction in a preset section based on a central axis of rotation of the driving unit 400 , specifically, the driving wheel unit 420 .

A protrusion 425 protrudes from the outer circumference of the drive wheel unit 420 toward the outside, and this protrusion 425 is formed in the shape of a groove around the inner circumferential surface of the encoder unit 930, specifically, the rotating body 931 Due to being inserted into the insertion groove 932, the rotation of the driving unit 400, specifically the driving wheel unit 420 and the encoder unit 930, specifically the rotation body unit 931, is performed equally with respect to the same rotational central axis. can

Since the rotation of the drive wheel unit 420 and the rotation body unit 931 are identical, the encoder unit 930 can accurately measure the rotational motion and rotation angle of the drive unit, and is driven through the power transmission unit 330. There is an effect of precisely sensing whether or not the power generated in the module 300 is transmitted to the driving unit 400 .

Referring to FIGS. 4 to 6 , the rotating body 931 according to an embodiment of the present invention may include a conducting wire 933 . The conducting wire part 933 is capable of electrical contact with the encoder contact end 935, and may include a first conducting wire part 933a and a second conducting wire part 933b.

5 and 6, the first conducting wire part 933a according to an embodiment of the present invention is capable of contacting the encoder contact end 935, specifically, the first encoder contact end 935a, and the second The conducting wire part 933b may contact the second encoder contact end 935b.

The first conductor part 933a according to an embodiment of the present invention may maintain contact with the first encoder contact end 935a.

The second encoder contact end 935b according to an embodiment of the present invention can selectively contact the second conductor part 933b as the driving unit 400, specifically, the driving wheel part 420 rotates.

4 and 5, the first conducting wire portion 933a according to an embodiment of the present invention is formed on one surface of the rotating body portion 931, based on the central axis of rotation of the rotating body portion 931. It may be formed extending along the circumferential direction.

Referring to FIG. 5 , the first conductor part 933a may maintain contact with the first encoder contact end 935a when the driving wheel part 420 and the rotating body part 931 rotate.

5 and 6, a plurality of second conductors 933b according to an embodiment of the present invention may be provided, and the other surface of the rotating body 931 on which the first conductors 933a are formed. It may be spaced apart at predetermined intervals along the circumferential direction on the top.

5 and 6, the second conducting wire portion 933b according to an embodiment of the present invention may be formed along the outer circumference of the rotating body portion 931, and formed on the rotating body portion 931 It can be seated and placed on the seating groove 934 .

Since the plurality of second conductors 933b are spaced apart at predetermined intervals along the outer circumferential surface of the rotating body 931, the driving wheel 420 and the rotating body 931 are rotated, thereby rotating the second conducting wire. (933b) can selectively contact the second encoder contact terminal (935b).

When the second encoder contact end 935b comes into contact with the second conducting line part 933b, the second encoder contact end 935b and the second conducting line part 933b are electrically connected, and the first encoder contact end 935a and An electrical signal may be generated as the second encoder contact end 935b contacts both the first and

second conductors

933a and 933b and is electrically connected.

The generated electrical signal may be transmitted to the control module 17 and may sense whether or not the driving unit 400 is driven. That is, it is possible to measure whether the power generated in the driving module 300 is properly transmitted to the driving unit 400 and the rotation number and rotation angle of the driving wheel unit 420 .

The seating groove 934 according to an embodiment of the present invention is formed in the shape of a groove and may have the same thickness as that of the second conductor 933b. As a result, the area where the seating groove 934 is not formed on the rotating body 931 and the outer surface of the second conductor portion 933b disposed on the seating groove 934 can form the same plane.

In addition, the outer surface of the second conductor part 933b and the outer circumferential surface of the rotating main body 931 on which the seating groove 934 is not formed form the same plane, so that the driving wheel 420 and the rotating main body 931 rotate. And when the second conductor part 933b and the second encoder contact end 935b come into contact, there is an effect of enabling stable contact.

In other words, when the outer surface of the second conductor part 933b and the outer circumferential surface of the rotating main body 931 where the seating groove 934 is not formed do not form the same plane, a step difference may be formed, and due to this step difference Contact can be made smoothly, but the encoder unit 930 according to an embodiment of the present invention does not have this problem.

Referring to FIG. 5 , the encoder contact end 935 according to an embodiment of the present invention may have elasticity. Specifically, the encoder contact end 935 may have an elastic restoring force toward the wire portion 933 formed on the rotating main body portion 931, and due to this, the encoder contact end 935 is spaced apart from the rotating main body portion 931. It has the effect of preventing this.

Referring to FIG. 5 , a bent portion 936 may be formed in a predetermined section of the encoder contact end 935 according to an embodiment of the present invention. As a result, in the section where the bent portion 936 is formed, one surface of the encoder contact end 935 facing the rotating body portion 931 may have a preset radius of curvature and have a curved shape, and the rotating body portion 931 There is an effect of having a stable contact state.

The encoder contact end 935 according to an embodiment of the present invention is bent once, and the bending part 936 is formed singly, but is not limited thereto, and is bent more than once, and the bending part 936 is formed in plurality Various modifications are possible, such as being formed.

5, the contact holding part 937 according to an embodiment of the present invention is disposed between the encoder contact end 935, specifically, the second encoder contact end 935b and the rotating body 931. , It is possible to contact the rotating main body 931 and the second encoder contact end 935b at the same time.

The contact holding part 937 extends with respect to the central axis in the longitudinal direction and may be formed in a cylindrical shape.

Since the contact holding part 937 according to an embodiment of the present invention is formed in a cylindrical shape, the outer circumferential surface of the contact holding part 937 may be formed as a curved surface, As is rotated, it is selectively contacted with the second conductor part 933b and maintained in contact with the second encoder contact end 935b, thereby having an effect of stably sensing the driving of the driving unit 400. .

The encoder unit 930 according to an embodiment of the present invention measures whether the first encoder contact terminal 935a and the second encoder contact terminal 935b are electrically connected and disconnected and the number of times of electrical connection, so that the driving wheel unit 420 ) can measure the rotational angle and rotational speed, and can accurately measure the driving of the drive unit 400.

The operating principle and effect of the chemical solution injection device 1 according to an embodiment of the present invention as described above will be described.

2 to 4, before attaching the chemical solution injection device 1 to the user, the chemical solution D is stored in the reservoir body 210, and then the chemical solution is transferred from the reservoir body 210 to the needle N. The injection process of discharging (D) and using the chemical solution (D) will be described as follows.

The user injects the chemical solution D into the reservoir unit 200 of the chemical solution injection device 1 using an external drug solution D injector (not shown). Referring to FIG. 8, prior to injecting the chemical solution D, the plunger 230 is disposed at the front end of the reservoir body 210, and the rod unit 410 is assembled to the connecting member 430 at the rear end of the plunger 230. has been

The user inserts the drug solution D to be injected into the drug solution D injector (not shown), and inserts the drug solution D injector into the inlet end of the reservoir unit 200 . At this time, the air remaining inside the reservoir body 210 may be primed.

In detail, during the assembly process of the reservoir unit 200, air remains between the reservoir body 210 and the plunger 230. If the chemical solution D is injected while air remains in the reservoir body 210, there is a risk that the air will also be injected into the user, so an operation to remove the air (priming operation) is required.

When the chemical liquid (D) starts to flow into the reservoir body 210 from the chemical liquid (D) injector, the gas remaining between the inner surface of the reservoir body 210 and the plunger 230 flows through the needle (N). Push out. At this time, the gas may move along the guide groove (reference numeral not set).

That is, the gas remaining inside the reservoir body 210 may be discharged to the needle N along the guidance of the guide groove by the flowing chemical liquid D. Gas remaining inside the reservoir body 210 is quickly discharged to the outside by the guide of the guide groove, so that the gas in the reservoir body 210 can be removed.

The reservoir sensor unit 910 may be driven according to the amount of the chemical solution D injected into the reservoir body 210 . As the chemical solution D is injected into the reservoir body 210, the connector member 250 connected to the plunger 230 rotates the central axis in the movement direction of the plunger 230 and the rod unit 410 connected to the plunger 230. It moves together, and as the connector member 250 moves, it can sequentially come into contact with the first connector contact end 911 and the second connector contact end 912 .

When the connector member 250 is in contact with the first connector contact end 911 and the second connector contact end 912, the first contact end 927 and the second contact end 928 are electrically connected. 1 mode can be driven. The first mode is an AWAKE mode for the chemical solution injection device 1 , and the drug injection device 1 may be preheated in advance so as to be immediately driven when the drug injection device 1 is attached to the user.

In addition, it informs the user through the user terminal 20 that the preset first reference amount of the chemical solution D is stored in the reservoir body 210, so that the user can be notified in advance to use the drug solution injection device 1. .

In another embodiment, when the connector member 250 is connected to the first connector contact end 911, the control module 17 recognizes it as a first event, and when connected to the second connector contact end 912, the control module 17 ) can be recognized as the second event. That is, when the connector member 250 contacts each other contact end 926, different events may be recognized and the events may be transmitted to the user.

As shown in FIG. 9 , when the priming operation in which gas in the reservoir body 210 is removed in the above-described drug storage step is completed and the drug is stored in the reservoir body 210, the drug injection device 1 informs the user can be attached

The user may attach the drug solution injection device 1 to the user and drive the needle driver 600 to insert the needle N and the cannula into the user's skin. The needle N is inserted into the skin together with the cannula, and can lead the cannula to be inserted into the skin.

Then, the needle (N) is withdrawn from the skin, but remains connected to the cannula. Specifically, when the user further drives the needle driving unit 600, the needle (N) moves upward in a state where the cannula is inserted into the skin.

Specifically, the needle driving unit 600 according to an embodiment of the present invention may be formed in a pressing manner, and when the user presses the needle driving unit 600 one more time, the needle N is in a state in which the cannula is inserted into the skin. can be moved to the top.

At least a portion of the cannula and the needle N may be connected to form and maintain a path through which the liquid medicine D flows.

The driving module 300 and the driving unit 400 may be driven at substantially the same time as the cannula and the needle N are inserted into the user. The drug solution injection device 1 may inject the drug solution D into a user according to a predetermined cycle and injection amount.

When the needle assembly 100 receives power from the needle driving unit 600 and inserts the needle N and the cannula into the skin, the driving module 300 may be driven.

3, 4, and 6, the drive module 300 according to an embodiment of the present invention transmits power to the drive unit 400. Specifically, when power is generated from the drive source 310, the power Power may be transmitted to the driving unit 400 through the transmission unit 330 .

The driving unit 400, specifically, the driving wheel unit 420 may receive power from the power transmission unit 330 and rotate about a central axis in the longitudinal direction as a rotational axis.

Referring to FIG. 9 , in the step of injecting the chemical solution D and injecting the chemical solution D to the user, the connection member 430 is inserted into the driving wheel unit 420, and the connection member 430 Due to the flat portion formed on the outer circumferential surface, the connection member 430 can be rotated in conjunction with the rotation of the drive wheel unit 420 without a separate clutch unit.

In addition to this, the rod portion 410 connected to the connecting member 430 by screwing is rotated along the central axis in the longitudinal direction as the connecting member 430 rotates, and the plunger toward the front of the reservoir body 210 ( 230) has the effect of moving together.

While the rod part 410 and the plunger 230 move forward together, the chemical solution D may be discharged through the needle N. As a result, the drug can be stably injected into the user according to the preset driving cycle and driving speed of the driving module 300 .

Referring to FIGS. 3 to 6 , when the drive wheel unit 420 according to an embodiment of the present invention rotates, the encoder unit 930 may measure the rotation angle and rotation speed of the drive wheel unit 420 . The first encoder contact end 935a maintains electrical contact with the rotating body part 931, specifically the first conducting wire part 933a, but the second encoder contact end 935b is provided on the rotating body part 931. Electrical contact with the second conducting wire 933b may be maintained or released.

Specifically, the first conductor part 933a contactable with the first encoder contact end 935a is the center of rotation of the rotation body part 931 on one surface facing the first encoder contact end 935a of the rotation body part 931. The second conductor part 933b, which extends along the circumferential direction with respect to the axis and is capable of contacting the second encoder contact end 935b, is set in advance along the other surface of the rotating body 931, specifically along the circumferential direction of the outer surface. A plurality of dogs may be arranged spaced apart from each other.

The encoder unit 930 may measure data related to the rotation of the driving wheel unit 420 by electrically measuring a connection signal and/or an electrical release signal. The control module 17 calculates the rotation angle and rotation speed of the drive wheel unit 420 based on the data measured by the encoder unit 930, and based on this, the movement distance of the plunger 230 and the discharge amount of the chemical solution D. can be calculated.

The chemical solution injection device 1 according to an embodiment of the present invention can check whether the device is normally operated and can measure the injected amount of the chemical solution D stored in the reservoir body 210 .

In addition, as the rotation of the encoder unit 930 interlocks with the driving unit 400, specifically, the driving wheel unit 420, the driving of the driving unit 400 can be accurately sensed.

In addition, as the rotation of the encoder unit 930 is interlocked with the drive wheel unit 420, the electrical contact between the lead part 933 and the encoder contact end 935 can accurately sense the operation of the drive unit 400. there is.

In addition, in relation to the operation of the driving unit 400, there are effects that can be identified in detail, such as forward rotation, reverse rotation, and non-rotation.

In addition, the encoder unit 930 may accurately measure rotational data of the driving wheel unit 420 to sense whether the drug injection device 1 is normally driven.

In addition, since the encoder unit 930 measures the rotational angle of the driving wheel unit 420 and calculates the moving distance of the plunger 230, the amount of the chemical solution D injected into the user by the chemical solution injection device 1 can measure

Hereinafter, the configuration, operation principle, and effect of the chemical liquid injection device according to the second embodiment of the present invention will be described.

10 is a plan view showing a driving wheel unit and an encoder unit according to a second embodiment of the present invention. 11 is a view showing a state in which a driving wheel unit and an encoder unit according to a second embodiment of the present invention are viewed from one side. FIG. 12 is a view showing a state in which the drive wheel unit and the encoder unit according to the second embodiment of the present invention are viewed from the other side opposite to the one side of FIG. 11 .

The drug solution injection device according to the second embodiment of the present invention can be used for various purposes according to the type of the injected drug solution (D). For example, the drug solution (D) may include an insulin-based drug solution (D) for diabetics, other drug solutions (D) for the pancreas, a drug solution (D) for the heart, and other various types of drug solutions (D). there is.

The drug injection device according to the second embodiment of the present invention may include a housing 11, an attachment part 12, and a base body.

Since the chemical solution injection device according to the second embodiment of the present invention has a difference in the configuration of the encoder unit compared to the chemical solution injection device according to the above-described embodiment (first embodiment) of the present invention, the encoder unit will be described below. The difference in composition of is described in detail.

10 to 12, the encoder unit 930' according to the second embodiment of the present invention measures the rotation of the driving unit 400, and the rotation body 931', the encoder contact end 935 `) can be included.

Referring to FIG. 10, the encoder unit 930′ according to the second embodiment of the present invention may be connected to the drive unit 400, specifically, one end of the drive wheel unit 420, and may be connected to the reservoir unit 200 and When one side (left side of FIG. 10 ) of the connected driving wheel unit 420 is referred to as the front side, the encoder unit 930 ′ may be connected to the rear side (right side of FIG. 10 ) of the driving wheel unit 420 .

Referring to FIG. 10, the encoder unit 930' according to the second embodiment of the present invention is connected to the rear side (right side of FIG. 10) of the blade 421 formed on the drive wheel unit 420, but is limited thereto. It does not, but various modifications such as being connected to the front side (left side of FIG. 10) of the blade 421 are possible.

10 to 12, the rotating main body 931' according to the second embodiment of the present invention is connected to the driving unit 400, specifically the driving wheel unit 420 and is rotatable together, the driving wheel unit ( 420) may be formed in a ring shape to enable connection.

The rotating main body 931 ′ may be interlocked with the rotation of the driving wheel 420 . Rotation of the rotation body 931' can be viewed as rotation of the drive wheel unit 420.

Referring to FIG. 12 , an insertion groove 932 ′ may be formed in the shape of a groove in a predetermined section in a circumferential direction based on the rotation center axis of the rotation body 931 ′.

Referring to FIG. 12 , the protrusion 425 formed in the drive unit 400 may be inserted into the insertion groove 932' formed in the rotating body 931'. The protruding portion 425 may protrude in a radial direction in a preset section based on a central axis of rotation of the driving unit 400 , specifically, the driving wheel unit 420 .

A protrusion 425 protrudes from the outer circumferential surface of the drive wheel unit 420 toward the outside, and this protrusion 425 forms a groove around the inner circumference of the encoder unit 930', specifically, the rotating body 931'. Due to being inserted into the formed insertion groove 932', the driving unit 400, specifically the driving wheel unit 420 and the encoder unit 930', specifically the rotation body unit 931' based on the same rotation center axis Rotation can be done in the same way.

Since the rotation of the drive wheel unit 420 and the rotation body unit 931' are identical, the encoder unit 930' can accurately measure the rotational motion and rotation angle of the drive unit, and the power transmission unit 330 Through this, there is an effect of precisely sensing whether or not the power generated in the driving module 300 is transmitted to the driving unit 400 .

Referring to FIGS. 10 to 12 , the rotating main body 931′ according to the second embodiment of the present invention may include a conducting wire 933′. The conducting wire part 933' is capable of electrical contact with the encoder contact end 935', and may include a first conducting wire part 933'a and a second conducting wire part 933'b.

The first conducting wire part 933`a is capable of contacting the encoder contact end 935`, specifically, the first encoder contacting end 935`a, and the second conducting wire part 933`b is contacting the second encoder. Contact with the stage 935'b may be possible. The first conductor part 933'a may maintain contact with the first encoder contact end 935'a.

The second encoder contact end 935'b according to the second embodiment of the present invention selectively contacts the second conductor part 933'b as the driving unit 400, specifically, the driving wheel part 420 rotates. this is possible

10 and 11, the first conductor part 933'a according to the second embodiment of the present invention is formed on one side of the rotating body 931', It may be formed extending along the circumferential direction based on the rotation center axis.

Referring to FIG. 11, the first conducting wire part 933`a can maintain a state in contact with the first encoder contact end 935`a when the driving wheel part 420 and the rotating body part 931` rotate. .

10 and 12, a plurality of second conductors 933'b according to the second embodiment of the present invention may be provided, and the rotating body portion in which the first conductors 933'a are formed (931`) may be spaced apart from each other at predetermined intervals along the circumferential direction.

10 and 12, the second conducting wire part 933'b according to the second embodiment of the present invention is one surface of the rotating body part 931' on which the first conducting wire part 933'a is formed ( It may be formed on the right side of FIG. 10) and the opposite side (left side of FIG. 10).

The plurality of second conductor parts 933'b may be spaced apart from each other at predetermined intervals along the circumferential direction based on the center of rotation of the rotating body part 931'. Each end of the plurality of second conductor parts 933'b may be connected for electrical connection.

Since the plurality of second conductors 933'b are spaced apart at preset intervals along the circumference based on the center of rotation of the rotating body 931', the driving wheel unit 420 and the rotating body 931' As is rotated, it is possible to selectively contact the second encoder contact end 935'b.

When the second encoder contact end 935'b comes into contact with the second conducting wire part 933'b, the second encoder contact end 935'b and the second conducting wire part 933'b are electrically connected. The 1st encoder contact end 935`a and the 2nd encoder contact end 935`b come into contact with both the first conducting wire part 933`a and the second conducting wire part 933`b and are electrically connected, thereby generating an electrical signal. can be created.

Although not shown in the drawing, the encoder unit 930' according to the second embodiment of the present invention maintains contact between the encoder contact end 935' and the conducting wire 933', as in the first embodiment. Additions can be placed.

In the encoder unit 930' according to the second embodiment of the present invention, each surface (Fig. Encoder according to the first embodiment of the present invention in which a plurality of second conductors 933b are spaced apart along the circumferential direction of the outer surface of the rotating body 931, except for the point formed on the reference left and right surfaces). Since the configuration, operating principle and effect are the same as the unit, detailed descriptions will be omitted to the extent that they overlap.

Hereinafter, the configuration, operation principle, and effect of the liquid medicine injection device according to the third embodiment of the present invention will be described.

13 is a plan view showing a driving wheel unit and an encoder unit according to a third embodiment of the present invention. 14 is a view showing a state in which a driving wheel unit and an encoder unit according to a third embodiment of the present invention are viewed from one side. FIG. 15 is a view showing a state in which the drive wheel unit and the encoder unit according to the third embodiment of the present invention are viewed from the other side opposite to the one side of FIG. 11 .

Referring to FIG. 13, the encoder unit 930`` according to the third embodiment of the present invention may be connected to the driving unit 400, specifically, one end of the driving wheel unit 420, and the reservoir unit 200 If one side of the drive wheel unit 420 (left side in FIG. 13) connected to is referred to as the front side, the encoder unit 930`` may be connected to the rear side (right side in FIG. 13) of the drive wheel unit 420.

Referring to FIG. 13, the encoder unit 930`` according to the third embodiment of the present invention is connected to the rear side (right side of FIG. 13) of the blade 421 formed on the drive wheel unit 420, but It is not limited, and various modifications are possible, such as being connected to the front side (left side of FIG. 13) of the blade 421.

13 to 15, the rotating main body 931`` according to the third embodiment of the present invention is connected to the driving unit 400, specifically the driving wheel unit 420 and is rotatable together, the driving wheel unit It may be formed in a ring shape to enable connection to 420.

The rotating main body 931`` may be interlocked with the rotation of the driving wheel unit 420. The rotation of the rotation body 931`` can be regarded as the rotation of the driving wheel unit 420.

Referring to FIG. 15 , an insertion groove 932 `` may be formed in the shape of a groove in the rotation body 931 `` in an inward direction in a predetermined section along the circumferential direction with respect to the rotation center axis.

Referring to FIG. 15 , the protrusion 425 formed in the drive unit 400 may be inserted into the insertion groove 932 ″ formed in the rotating body 931 ″. The protruding portion 425 may protrude in a radial direction in a preset section based on a central axis of rotation of the driving unit 400 , specifically, the driving wheel unit 420 .

A protrusion 425 protrudes from the outer circumference of the drive wheel unit 420 toward the outside, and this protrusion 425 is formed as a groove on the inner circumference of the encoder unit 930``, specifically, the rotating body 931``. Due to being inserted into the insertion groove 932`` formed in the shape, the drive unit 400, specifically the drive wheel unit 420 and the encoder unit 930``, specifically the rotation body unit ( 931``) can be rotated in the same way.

Since the rotation of the drive wheel unit 420 and the rotation body unit 931`` are performed identically, the encoder unit 930`` can accurately measure the rotational motion and rotation angle of the drive unit, and the power transmission unit 330 ), there is an effect of precisely sensing whether or not the power generated in the driving module 300 is transmitted to the driving unit 400.

13 to 15, the rotating main body 931`` according to the third embodiment of the present invention may include a conducting wire. The conducting wire part can electrically contact the encoder contact end, and may include the first conducting wire part 933``a and the second conducting wire part 933``b1 and 933``b2.

The first conductor part 933``a is contactable with the encoder contact end, specifically, the first encoder contact end 933``a, and the second conductor part 933``b1, 933``b2 is Contact with the second encoder contact terminals 935``b1 and 935``b2 may be possible. The first conductor part 933``a may maintain contact with the first encoder contact end 933``a.

The second encoder contact terminals 935``b1 and 935``b2 according to the third embodiment of the present invention rotate the driving unit 400, specifically, the driving wheel unit 420, so that the second conductor part 933` Optional contact with `b1, 933`` b2) is possible.

13 and 14, the first conductor 933``a according to the third embodiment of the present invention is formed on one side of the rotating body 931``, and the rotating body 931` `) may be formed extending along the circumferential direction based on the central axis of rotation.

Referring to FIG. 14, the first conductor part 933``a shows a state in which the driving wheel part 420 and the rotating body part 931`` are in contact with the first encoder contact end 933``a during rotation. can keep

13 to 15, a plurality of second conductors 933``b1 and 933``b2 according to the third embodiment of the present invention may be provided, and It may be formed on both sides (the left side and the right side based on FIG. 13) based on the central axis in the longitudinal direction.

The plurality of second conductor parts 933``b1 and 933``b2 may be spaced apart from each other at preset intervals along the circumferential direction based on the center of rotation of the rotating main body 931``.

14 and 15, the second conducting wire parts 933``b1 and 933``b2 are the first group 933``b1 formed on the same plane as the first conducting wire part 933``a, A second group 933``b2 formed on the other surface opposite to the same surface may be included, and a plurality of second conductor parts 933``b1 and 933`` respectively formed in the first group and the second group. b2) may be arranged so as not to overlap with each other based on the central axis of the longitudinal direction of the driving wheel unit 420 and the rotation body unit 931``.

Due to this, it is possible to measure the driving of the driving unit 400 according to a relatively small rotation angle, so that the power transmitted from the driving module 300 to the driving unit 400 can be accurately sensed.

A plurality of second encoder contact ends 935``b1 and 935``b2 are provided, and the second conductor parts 933``b1 and 933``b2 respectively formed on both sides of the rotating body 931`` ) may be disposed to be in contact with the first group 933``b1 and the second group 933``b2, respectively.

When the second encoder contact ends 935``b1 and 935``b2 come into contact with the second conductor parts 933``b1 and 933``b2, the second encoder contact ends 935``b1 and 935``b2 ) and the second conductor parts 933``b1 and 933``b2 are electrically connected, and the first encoder contact end 933``a and the second encoder contact end 935``b1 and 935``b2 ) is electrically connected to all of the first conducting wire parts 933``a and the second conducting wire parts 933``b1 and 933``b2, and electrical signals can be generated.

Although not shown in the drawing, in the encoder unit 930`` according to the third embodiment of the present invention, a contact maintaining part may be disposed between the encoder contact end and the conducting wire, similarly to the first embodiment.

In the encoder unit 930`` according to the third embodiment of the present invention, the second conductor is formed on both sides of the rotating body (left and right surfaces in FIG. 13), and the first group 933``b1, the second group ( 933``b2), and the first group and the second group do not overlap with respect to the central axis in the longitudinal direction of the rotating body part 931``. Since the configuration, operating principle, and effect are the same as those of the encoder unit 930 according to the present invention, a detailed description thereof will be omitted in the overlapping range.

Hereinafter, the configuration, operation principle, and effect of the chemical solution injection device according to the fourth and fifth embodiments of the present invention will be described. 16A and 16B are diagrams respectively showing the second conductor according to the fourth and fifth embodiments of the present invention.

Referring to FIGS. 16A and 16B , the encoder unit according to the fourth and fifth embodiments of the present invention may include a rotating body and an encoder contact end. The rotating main body includes a conducting wire, and the conducting wire may include a first conducting wire and a second conducting wire.

16A and 16B, the second conductor according to the fourth and fifth embodiments of the present invention may form a plurality of groups, and these plurality of groups may be disposed on the same plane on the rotating body. there is.

Referring to FIG. 16A, the second conductor according to the fourth embodiment of the present invention may include two groups 933```b1 and 933```b2, and as shown in FIG. 16B, the present invention The second conductor according to the fifth embodiment of may be provided with three groups (933````b1, 933````b2, 933````b3).

These plurality of groups may be arranged according to the distance from the center of rotation (C) of the rotation body unit.

The second conductor according to the fourth and fifth embodiments of the present invention, specifically, the center of the plurality of second conductors provided in each group forms an imaginary straight line in the radial direction from the rotation center C of the rotating body. When created, they are not collinear.

That is, referring to FIG. 16A, the center of the second conducting wire part 933```b1 of the first group is disposed on the first straight line AX1, but the second conducting wire part 933```b1 of the second group is disposed. The center of the second group 933```b2 may be disposed on the second straight line AX2 different from the first straight line AX1 without passing through the center of b2).

Similarly, referring to FIG. 16B , the center of the second conductor part 933````b1 of the first group is disposed on the first straight line AX1, and the second straight line AX2 different from the first straight line AX1 is disposed. ), the center of the second group of second conductors 933```` b2 may be disposed, and the third group of second conductors 933```` on another third straight line AX3. The center of `b3) can be placed.

Since the second conductor forms a plurality of groups and is in contact with a plurality of second encoder contact ends, driving of the driving unit 400 according to a relatively small rotation angle can be measured, and the driving unit in the driving module 300 can be measured. There is an effect of precisely sensing the power transmitted to (400).

In the encoder unit according to the fourth and fifth embodiments of the present invention, the second conductor forms a plurality of groups on one surface of the rotating body, and the plurality of groups are arranged according to the distance from the rotation center C of the rotating body, and each The encoder unit 930 and the configuration according to the first embodiment of the present invention, except that the center of the second conductor part of the group is not disposed on the same imaginary straight line formed from the rotation center C of the rotating body part. , Since the operating principle and effect are the same, a detailed description is omitted to the extent of overlapping with this.

The spirit of the present invention should not be limited to the above-described embodiments and should not be determined, and not only the claims to be described later, but also all ranges equivalent to or equivalently changed to these claims fall within the scope of the spirit of the present invention. would be said to belong.

According to the present invention, a chemical solution injection device is provided. In addition, the embodiments of the present invention can be applied to an industrially used instrument for injecting a drug solution into a patient's body.

Claims

base body;

A needle assembly mounted on the base body;

a reservoir unit fluidly connected to the needle assembly and having a plunger therein;

a drive unit for linearly moving the plunger; and

A chemical solution injection device comprising: a rotating body connected to the driving unit and rotatable together, and an encoder unit measuring rotation of the driving unit.
According to claim 1,

The encoder unit,

a first conducting wire; The rotating main body portion provided with a second conducting wire portion;

a first encoder contact end connected to contact the first conducting wire; and

and a second encoder contact end selectively contactable with the second conducting wire according to rotation of the driving unit.
According to claim 2,

The first conducting wire portion is formed extending along the circumferential direction with respect to the central axis of rotation of the rotating body portion on one surface of the rotating body portion,

A plurality of second conductors are provided, and are disposed spaced apart from each other at predetermined intervals along the circumferential direction on the other surface of the rotating body.
According to claim 2,

The first encoder contact end and the second encoder contact end have elasticity.
According to claim 2,

The first encoder contact end and the second encoder contact end are formed with a bent part in which each end of the rotation body part is bent at least once or more.