KR20230085348A - Reservoir assembly and apparatus for infusing medical liquid comprising the same - Google Patents

Abstract

One embodiment of the present invention is to provide a reservoir assembly, which includes a reservoir which provides a storage space for a chemical liquid inside, an opening formed in the front for the chemical liquid to flow, and protrusions disposed on the inner circumferential surface; and a plunger which is disposed inside the reservoir and in which an initial position is set by being supported on the protrusions.

Description

Reservoir assembly and apparatus for injecting liquid containing the same

The present invention relates to a reservoir assembly and a chemical solution injection device including the same.

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.

The present invention provides a reservoir assembly capable of safely delivering a fixed amount of chemical solution and a chemical solution injection device including the same.

As a means for achieving the above technical problem, a reservoir assembly according to an embodiment of the present invention provides a storage space for a chemical solution therein, an opening through which the chemical solution can flow is formed at the front, and a protrusion on an inner circumferential surface. It may include a reservoir disposed inside the reservoir, and a plunger supported by the protrusion to set an initial position.

In one embodiment, the reservoir has an inlet end through which the chemical solution is injected and an outlet end connected to a needle assembly and discharging the chemical solution, and the projection is disposed adjacent to at least one of the inlet end and the outlet end. can

In one embodiment, the plunger may have a groove into which the protrusion is inserted on an outer circumferential surface.

In one embodiment, the plunger is supported by the protrusion and maintains an initial position at the front of the reservoir, but may move to the rear of the reservoir when the liquid medicine flows into the reservoir.

The chemical solution injection device according to an embodiment of the present invention is connected to a reservoir assembly storing a chemical solution, the reservoir assembly, and a needle assembly discharging the chemical solution and the reservoir assembly, and is connected to the reservoir assembly when driving the reservoir assembly. and a driving unit for moving the chemical liquid from a bur to the needle assembly, wherein the reservoir assembly provides a storage space for the chemical liquid therein, an opening through which the chemical liquid flows is formed at a front side, and a protrusion on an inner circumferential surface thereof. It may include a formed reservoir and a plunger disposed inside the reservoir and supported by the protrusion to set an initial position.

Other aspects, features and advantages other than those described above will become apparent from the following drawings, claims and detailed description of the invention.

According to the chemical solution injection device and reservoir assembly according to an embodiment of the present invention, by preventing the plunger from moving from a set position before the user uses the device, a fixed amount of the chemical solution can be stored and then supplied to the user. In addition, it is possible to prevent bubbles from being formed in the stored chemical solution.

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 a side cross-sectional view of a reservoir assembly according to an embodiment of the present invention.
FIG. 4 is an enlarged view of portion A of FIG. 3 .
FIG. 5 is a view showing projections of a different embodiment from those of FIG. 4 .
FIG. 6 is a view showing projections of FIG. 4 and another embodiment.
FIG. 7 is a view showing a state in which a predetermined chemical liquid is injected in FIG. 3 .
FIG. 8 is a view showing a state in which the maximum amount of chemical liquid is injected in FIG. 3 .
9 is a perspective view illustrating a driving unit and a driving module according to an embodiment of the present invention.
10 is a view showing another embodiment of the reservoir assembly 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.

1 is a block diagram showing a chemical solution 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 sensor 40 . In the drug injection system 1, a user can drive and control the system using the user terminal 20, and based on blood sugar information monitored by the biometric information sensor 40, the drug solution injection device 10 administers the drug solution. It can be injected periodically.

Based on the data sensed by the biometric sensor 40, the drug injection device 10 administers drugs to be injected to the user, for example, insulin, glucagon, anesthetics, painkillers, dopamine, growth hormone, smoking cessation aids, and the like. It also performs the function of injecting.

In addition, the liquid medicine injection device 10 may transmit a device status message including information on the remaining battery capacity of the device, whether or not booting of the device was successful, whether injection was successful, etc. to the controller 30 . Messages delivered to the controller may be delivered to the user terminal 20 via the controller 30 . Alternatively, the controller 30 may transmit improved data obtained by processing the received messages to the user terminal 20 .

In one embodiment, the drug injection device 10 is provided separately from the biometric information sensor 40 and may be installed to be spaced apart from the target 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 solution injection device 10 may be mounted on the user's body. Also, in another embodiment, the drug solution injection device 10 may be mounted on an animal to inject the drug solution.

The user terminal 20 may receive an input signal from a 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 and control the controller 30 to drive the drug injection device 10 . In addition, the user terminal 20 may display biometric information measured by the biometric information sensor 40 and state information of the drug injection device 10 .

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. Also, the user terminal 2 may be a wearable device having a communication function and a 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 10, and the user terminal 20 may be provided to the subject or a third person. 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 may communicate with the drug injection device 10 to control injection of the drug solution.

The controller 30 performs a function of transmitting and receiving data to and from the drug injection device 10, transmits a control signal related to injection of a drug solution such as insulin to the drug injection device 10, and transmits a blood glucose level 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.

For example, the controller 30 may transmit an instruction request to measure the current state of the user to the drug injection device 10 and receive measurement data from the drug injection device 10 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 cycle and/or an injection amount of the chemical solution 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 embodiment, 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 10 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, 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 exist, but are not limited thereto.

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

Referring to FIG. 2 , the drug solution injection device 10 is attached to a user to inject the drug solution, and may inject the drug solution stored therein in a predetermined amount to the user.

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

An embodiment of the drug solution injection device 10 may include a housing 11 covering the outside and an attachment portion 12 positioned adjacent to the user's skin. The chemical solution injection device 10 includes a plurality of parts disposed in the inner space between the housing 11 and the attachment part 12 . A separate bonding means may be further interposed between the attachment part 12 and the user's skin, and the drug solution injection device 10 may be fixed to the skin by the bonding means.

The drug injection device 10 may include a reservoir assembly 100, a driving unit 200, a driving module 300, a needle assembly 400, a battery, and the like.

3 is a side cross-sectional view of the reservoir assembly 100 according to an embodiment of the present invention, and FIG. 4 is an enlarged view of part A of FIG. 3 .

Referring to FIGS. 3 and 4 , the reservoir assembly 100 stores a chemical liquid in at least a part of an internal space, and uses a driving force generated by the operation of a driving unit and a driving module to be described later to transfer the chemical liquid to the needle assembly. quantity can be discharged.

The reservoir assembly 100 may include a reservoir 110, a plunger 120, and a sensor unit.

The reservoir 110 may form the exterior of the reservoir assembly 100 and provide an internal space in which the plunger 120 can be accommodated. A part of the internal space of the reservoir 110 is formed as a storage space for the liquid medicine, and the storage space may be defined by the reservoir 110 and the plunger 120.

In one embodiment, the reservoir 110 may be in the form of a cylinder. The reservoir 110 may have a cylinder shape with a front closed. Also, the rear of the reservoir 110 may be opened to form an open inner space. Alternatively, the reservoir 110 may be closed at the rear to form a closed internal space.

The reservoir 110 may be formed with an inlet end 112 and an outlet end 113 capable of flowing the chemical liquid at the front. The chemical solution flows into the inner space of the reservoir 110 through the inlet end 112 to form a storage space, and the chemical solution stored in the storage space can be discharged through the outlet end 113. Although the figure shows a reservoir 110 having an inlet end 112 and an outlet end 113 respectively formed at the front, one opening is formed in front of the reservoir 110, and the opening is used to inject a chemical solution. It may be configured to communicate with the inlet end 112 and the outlet end 113 through which the chemical solution is discharged.

A packing member 112a is provided at the inlet end 112 to prevent the chemical solution injected into the reservoir 110 from flowing out through the inlet end 112 . In addition, the injection needle LF may be inserted through the packing member 112a and the liquid medicine may be injected.

The packing member 112a may have reclosable properties. For example, even when the injection needle LF invades the packing member 112a and then is removed to fill the reservoir 110 with a chemical solution, the packing member 112a is invaded by the injection needle LF. Through one part, it is possible to prevent leakage of the chemical solution.

The packing member 112a may be formed of a material including polypropylene, thermoplastic elastomer, vegetable oil, or the like. The injected chemical solution may form a storage space while being introduced into the inner space of the reservoir 110 by pushing the plunger 120 backward.

A conduit 113a is connected to the outlet end 113, and the reservoir 110 may be connected to the drive unit through the conduit 113a. The chemical solution stored in the storage space may flow to the needle assembly through the outlet end 113 and the conduit 113a connected to the outlet end 113 .

The plunger 120 may move in at least one of forward and backward directions in the internal space of the reservoir 110 by the flow of the chemical solution to the inside of the reservoir 110 . A storage space may be defined by the front surface of the reservoir 110 and the plunger 120 in the internal space of the reservoir 110 . The front of the plunger 120 together with the reservoir 110 forms a storage space for the chemical solution, and when the chemical solution is stored in the reservoir 110, it may come into contact with the chemical solution.

The outer circumferential surface of the plunger 120 is in close contact with the inner circumferential surface of the reservoir 110 to prevent leakage of the chemical solution stored in the storage space. For example, the plunger 120 may be made of a material having elasticity, such as rubber or silicon, and may come into close contact with the inner circumferential surface of the reservoir 110 .

At least one groove 121 may be formed on the outer circumferential surface of the plunger 120 . The groove 121 may be formed along the circumferential direction on the outer circumferential surface of the plunger 120 . When a plurality of grooves 121 are formed on the outer circumferential surface of the plunger 120, they may be disposed along the longitudinal direction of the plunger 120.

The reservoir 110 may have a protrusion 117 formed on an inner circumferential surface. The plunger 120 is maintained in the initial position set by the protrusion 117 and may move to the rear of the reservoir 110 as the chemical liquid flows into the reservoir 110 . That is, the plunger 120 maintains its initial position by the protrusion 117, but can move backward by the chemical liquid flowing into the reservoir 110.

The protrusion 117 may be disposed inside the reservoir 110 and protrude from an inner circumferential surface of the reservoir 110 . For example, the protrusion 117 may protrude annularly from the inner circumferential surface of the reservoir 110 . The protrusion 117 may be disposed adjacent to at least one of the inlet end 112 and the outlet end 113 .

Before the chemical liquid is injected into the reservoir 110, the plunger 120 may be located in front of the reservoir 110 in a state in which the front surface is in close contact with the reservoir 110 at the initial position. When the chemical solution is injected into the reservoir 110, the plunger 120 may move from the front to the rear by the injected chemical solution. And, when all of the chemical liquid is injected, the plunger 120 may stop moving and be positioned at the final position behind the reservoir 110.

If, before the chemical solution is injected into the reservoir 110, a pressure change due to the injection of sterilizing gas occurs inside the chemical solution injection device, or if vibration or shock is applied to the chemical solution injection device, the plunger 120 returns to its initial position. Detached, the front surface is spaced apart from the reservoir 110, and gas may be introduced into the reservoir 110. At this time, when the chemical solution is injected into the reservoir 110, the chemical solution is stored less than the predetermined capacity, and a problem may occur that a fixed amount of the drug solution cannot be provided to the user. In addition, bubbles may be generated in the stored chemical solution, which may cause safety problems.

In the initial position of the plunger 120, the protrusion 117 is inserted into the groove 121 to restrict the plunger 120 from moving backward. The protrusion 117 maintains the position of the plunger 120 so that the front surface of the plunger 120 is not separated from the reservoir 110 until the chemical solution is injected to the user, thereby maintaining the amount of the chemical solution that can be stored in the storage space. can be kept constant.

Referring to FIG. 4 , the front and rear protrusions 117a protruding from the inner circumferential surface of the reservoir 110 may be formed as curved surfaces. For example, the side section of the protrusion 117a may be formed in a partial shape of a circle or an ellipse. When a plurality of grooves 121 are formed on the outer circumferential surface of the plunger 120, the protrusion 117a may be formed to be inserted into the groove 121 formed at the foremost side.

FIG. 5 is a view of a projection of a different embodiment from FIG. 4 .

Referring to FIG. 5 , a plurality of protrusions 117b may protrude from the front of the reservoir 110 . A plurality of protrusions 117b may be inserted into a plurality of grooves 121 formed on the outer circumferential surface of the plunger 120 so that the plunger 120 maintains an initial position. The plunger 120 can more stably maintain its initial position by the plurality of protrusions 117b and the groove 121 .

FIG. 6 is a view of a protrusion of FIG. 4 and another embodiment.

Referring to FIG. 6 , the front portion of the protrusion 117c may have a greater curvature than the rear portion. Since the protrusion 117c has a greater curvature in the front than in the rear, it can relatively easily allow the plunger 120 to move forward, while restricting the backward movement of the plunger 120. Accordingly, the protrusion 117c may prevent gas from flowing into the reservoir 110 before the chemical solution is injected, but may not prevent the chemical solution stored in the reservoir 110 from being discharged to the end.

The sensor unit is a component for detecting injection of a chemical liquid into the reservoir 110 and may transmit a signal generated by the movement of the plunger 120 inside the reservoir 110 to the controller. The sensor unit may be connected to a flexible circuit board (FPCB), and through this, may be electrically connected to the controller.

The sensor unit may be provided with various types of sensors capable of sensing the position of a part, such as a light sensor and a contact sensor.

In one embodiment, the sensor unit may be composed of a magnetic sensor including a magnetic member 141 and a magnetic sensing member 142 . The magnetic member 141 is installed on the plunger 120 and can move together with the plunger 120 . The magnetic sensing member 142 may be installed at a predetermined position outside the reservoir 110 . The sensor unit may detect the position of the plunger 120 by generating a signal by the magnetic force formed between the magnetic member 141 and the magnetic sensing member 142 .

FIG. 7 is a view showing a state in which a predetermined chemical solution is injected in FIG. 3 , and FIG. 8 is a view showing a state in which the largest amount of chemical solution is injected in FIG. 3 .

The driving of the reservoir assembly 100 can be described with reference to FIGS. 3 and 7 to 8 . FIG. 3 shows a state before the chemical solution D flows into the reservoir 110, FIG. 7 shows a state that a predetermined chemical solution D flows into the reservoir 110, and FIG. 8 shows the reservoir 110 ) can indicate a state in which a quantitative amount of the chemical solution (D) is introduced.

As shown, an inlet end 112 and an outlet end 113 may be formed in front of the reservoir 110 . The plunger 120 in which the magnetic member 141 is installed is inserted into the inner space of the reservoir 110, and the front of the plunger 120 may face the inlet end 112 and the outlet end 113.

Before the chemical liquid is injected, the front surface of the plunger 120 may be positioned at an initial position where it can come into close contact with the reservoir 110 . At this time, the protrusion 117 may be inserted into the groove 121 so that the plunger 120 maintains an initial position. For example, the protrusion 117 may protrude in an annular shape on the inner circumferential surface of the reservoir 110 and be inserted into the groove 121 formed in an annular shape on the outer circumferential surface of the plunger 120 . By maintaining the initial position of the plunger 120 by the protrusion 170, it is possible to prevent gas from flowing into the reservoir 110 due to external factors.

<Process of introducing the chemical solution (D) into the reservoir 110>

In the order of FIGS. 3 and 7 to 8 , the chemical solution D may be stored in the reservoir 110 . While the chemical liquid D is stored in the reservoir 110, the plunger 120 may move from the front to the rear, preferably from the first position P-1 to the third position P-3.

Referring to FIG. 3 , in an initial state before the chemical solution D is introduced into the reservoir 110, the plunger 120 has an inlet end 112 and an outlet end 113 formed on the front surface of the plunger 120. It may be located at the first position (P-1) in contact with the front of the burr 110. At this time, a storage space may not be formed in the inner space of the reservoir 110 . The inlet end 112 and the outlet end 113 formed in front of the reservoir 110 are blocked by the front surface of the plunger 120, so that gas can be prevented from entering the inner space.

Referring to FIG. 7 , as the chemical liquid D is injected, the plunger 120 may form a storage space while moving backward from the first position P−1. While the plunger 120 moves by the second distance L2, the magnetic force formed between the magnetic member 141 and the magnetic sensing member 142 may gradually increase. When the plunger 120 is positioned at the second position (P-2), the magnetic force formed between the magnetic member 141 and the magnetic sensing member 142 may be maximized. When the plunger 120 moves backward from the second position P-2, the magnetic force formed between the magnetic member 141 and the magnetic sensing member 142 may gradually decrease.

The controller may detect a change in magnetic force according to the movement of the plunger 120 and generate a specific event of the lever unit. For example, when the magnetic force formed between the magnetic member 141 and the magnetic sensing member 142 is maximized, that is, when the plunger 120 is at the second position P-2, the controller controls the reservoir ( It may be recognized that the chemical solution D stored in 110) is stored as a first reference amount (for example, 10%, 20%, 30%, etc.). The first reference amount may vary depending on the location where the magnetic sensing member 142 is installed.

Upon recognizing that the chemical solution D is stored in the reservoir 110 as the set first reference amount, the controller may wake up the chemical solution injection device in the first mode (AWAKE). That is, the controller may confirm that a certain amount of the chemical liquid D is stored in the reservoir 110, and may start to partially drive the chemical liquid injection device to preheat. also. Through the user terminal 20 or the like, the user may be notified that the reservoir 110 stores the chemical solution D as much as the preset first reference amount, so that the user may be notified in advance to use the chemical solution injection device.

Referring to FIG. 8 , the plunger 120 is moved to the rear of the reservoir 110 by the inflow of the chemical solution D, and when a fixed amount of the chemical solution D flows into the reservoir 110, the first position ( It may stop at a third position (P-3) moved by a third distance (L3) from P-1). At this time, the storage space may be formed to the maximum.

Thereafter, the controller may inject the drug solution D into the patient in the second mode.

<The process of discharging the chemical solution (D) from the reservoir 110 to the needle>

Reversing the sequence of FIGS. 3 and 7 to 8 , the chemical solution D may be discharged from the reservoir 110 .

When the discharge of the chemical solution (D) starts, the chemical solution (D) stored in the reservoir 110 may be discharged to the needle assembly through the conduit (113a) connected to the outlet end (113). While the chemical liquid D is discharged from the reservoir 110, the plunger 120 may move from the third position P-3 to the first position P-1.

In the process of discharging the chemical solution D from the reservoir 110, the plunger 120 passes through the second position P-2, and the magnetic force formed between the magnetic member 141 and the magnetic sensing member 142 is can be max. At this time, the controller may activate the third mode by recognizing it as a specific event of the reservoir assembly 100 .

In the third mode, the controller may transmit an alarm signal indicating that the amount of the chemical solution D remaining in the reservoir 110 corresponds to the second reference amount to the user through the user terminal, the controller, and/or the alarm unit (not shown). .

The second reference amount may be defined as the amount of the chemical liquid D set by the controller at the time of driving in the third mode. The controller informs the user that the amount of the chemical solution D remaining in the reservoir 110 is the preset second reference amount, so that the user can prepare to replace the chemical solution injection device.

In one embodiment, the first reference amount and the second reference amount may be set to the same storage amount of the chemical solution D. That is, the second reference amount may be set equal to the amount of the chemical liquid D stored in the actual reservoir 110 . As the plunger 120 moves from the first position P-1 to the third position P-3 or from the third position P-3 to the first position P-1, the magnetic member ( 141) and the magnetic sensing member 142, the maximum value of the magnetic force formed is the same, so the first reference amount and the second reference amount may be set to be the same.

In another embodiment, the first reference amount may be set to a storage amount of the chemical solution D that is greater than the second reference amount. The first reference amount is a reference value set for driving in the first mode, and is preferably set to be substantially the same as the amount of the liquid chemical D stored in the reservoir 110 . However, the second reference amount is the amount of chemical liquid D recognized by the controller at the time when the third mode starts (the plunger 120 passes the second position P-2), and is actually stored in the reservoir 110. It may be set smaller than the amount of the remaining chemical liquid (D).

That is, when the plunger 120 passes the second position P-2, since the amount of the chemical solution D remaining in the actual reservoir 110 is greater than the second reference amount recognized by the controller, the controller controls the chemical solution Even if the risk due to the exhaustion of (D) is recognized, an extra amount corresponding to the difference between the actual residual amount of the chemical liquid (D) and the second reference amount for the second position (P-2) may exist in the reservoir 110. Then, even if the chemical solution injection device generates a signal that the chemical solution D is completely exhausted, the user can use the surplus chemical solution D, thereby preventing a sudden disconnection of the chemical solution D or an accident, thereby injecting the chemical solution. The safety of the device can be increased.

Since the remaining amount of the chemical solution D is important in the third mode, the controller can calculate the injected amount of the chemical solution D and the remaining amount of the chemical solution D in the reservoir 110 very precisely in the third mode. In the third mode, the controller accurately measures the rotation angle of the driving unit and the moving distance of the plunger 120 based on the data obtained from the encoder or the like, and the discharge amount of the chemical solution D and the chemical solution remaining in the reservoir 110 ( D) The amount can be strictly calculated. The residual amount of the chemical solution D accurately calculated in the third mode is delivered to the user in real time, so that the user can recognize the danger.

In one embodiment, the chemical solution injection device may accurately count the amount of the chemical solution D left in the reservoir 110 only in the third mode. In the second mode, since the amount of the chemical solution D stored in the reservoir 110 exceeds a preset range (ie, the second reference amount), the amount of the chemical solution D in the reservoir 110 is not accurately counted, In the third mode, the amount of the chemical solution D stored in the reservoir 110 may be quantitatively counted. Since the amount of the chemical solution D stored in the chemical solution injection device is accurately counted only at the level at which an alarm is required, the control load of the drug solution injection device can be reduced.

The chemical solution injection device and the reservoir assembly 100 according to an embodiment of the present invention may measure the injection amount of the chemical solution D stored in the reservoir 110 . The amount of the chemical solution D stored in the reservoir 110 is measured by the controller through the sensor unit, and driving of the drug injection device may be set.

In the chemical solution injection device and reservoir assembly 100 according to an embodiment of the present invention, the movement of the plunger 120 is controlled so that the plunger 120, which moves according to the flow of the chemical solution, does not move from its initial position due to other factors. By limiting it, it is possible to provide a fixed amount of the drug solution to the user.

When the chemical solution D is filled in the reservoir 110 to some extent, the chemical solution injection device and the reservoir assembly 100 according to an embodiment of the present invention can be preheated to increase driving efficiency. When the sensor unit senses that the amount of the chemical solution D injected into the reservoir 110 is greater than or equal to the first standard amount, the chemical solution injection device prepares to drive some parts in the first mode, and the drug solution injection device is operated by the user. When it is attached to, the chemical solution (D) can be injected immediately. The chemical solution injection device 10 and the reservoir assembly 100 according to an embodiment of the present invention may sense and notify the user when the chemical solution stored in the reservoir 110 falls below a predetermined range. When the sensor unit senses that the amount of the chemical solution stored in the reservoir 110 falls below or below the second reference amount, the chemical solution injection device 10 precisely counts the amount of the chemical solution remaining in the reservoir 110, This information can be delivered to the user.

9 is a perspective view illustrating a driving unit and a driving module according to an embodiment of the present invention.

Referring to FIG. 9 , the driving unit 200 may be connected to the driving module 300 and driven by driving force generated by the driving module 300 .

The drive unit 200 includes a base 210, a rotation unit 220, a force unit 230, a tube 240, and a drive piece 250, and the drive module 300 is connected to the drive piece 250. can

The base 210 supports the driving unit 200 and may form an exterior. At least one of the rotation unit 220, the force unit 230, the tube 240, and the driving piece 250 may be installed and supported on the base 210.

The base 210 may have a guide part 215 . The guide part 215 extends along the circumferential direction of the second rotating member 222 and may support the tube 240 . A portion of the guide portion 215 protrudes from one surface of the base 210 and may extend along a curved section of the tube 240 . In addition, another part of the guide part 215 may also extend in a straight section of the tube 240 .

The guide unit 215 may support the force applied by the force unit 230 to guide the movement of the liquid medicine. When the pressure unit 230 applies pressure to the tube 240 , the guide unit 215 supports the tube 240 on the opposite side of the pressure unit 230 . When the pressure unit 230 applies pressure to the tube 240 in a curved section, the tube 240 may be compressed so that the internal cross-sectional area through which the liquid medicine flows becomes zero at the pressure point where the tube 240 and the weight portion contact each other. At this time, when the force unit 230 rotates, the liquid medicine in the tube 240 also moves.

In one embodiment, the guide part 215 may be disposed outside the curved section, and the region where the force unit 230 applies pressure to the tube 240 may be disposed inside the curved section.

The drawing shows an embodiment in which the guide unit 215 is disposed outside the tube 240 and the force unit 230 is disposed inside the tube 240, but is not limited thereto. In another embodiment, the guide unit disposed inside the tube, and the force unit may be disposed outside the tube.

The rotating unit 220 is mounted on the front of the base 210 and can rotate by receiving driving force from the driving module 300 . The rotating unit 220 contacts the end of the driving piece 250, but may rotate in one direction according to the linear reciprocating motion of the driving piece 250. The rotation unit 220 may be defined as a configuration capable of receiving driving force from the driving module 300 and rotating at least some components to rotate the force unit 230 .

In one embodiment, a plurality of members of the rotation unit 220 may be connected in a driving manner. The rotation unit 220 may include a first rotation member 221 and a second rotation member 222 .

The first rotating member 221 may contact the end of the driving piece 250 and rotate according to the linear reciprocating motion of the driving piece 250 . The second rotating member 222 may be connected to the first rotating member 221 and rotate according to the rotation of the first rotating member 221 . The second rotating member 222 has a plate shape and can rotate around the second axis AX2.

The discharge amount of the chemical liquid is set according to the rotation angle of the second rotation member 222 . That is, the chemical liquid inside the tube 240 is discharged in a fixed amount according to the rotation angle of the force unit 230 when the second rotating member 222 rotates. The rotation angle and rotation speed of the second rotation member 222 may be set according to the number of movements of the drive shaft 310 and the number of teeth of the rotation unit 220 .

The force unit 230 is mounted on the rotation unit 220 and can rotate together with the rotation unit 220 . The force unit 230 may exert force on the tube 240 while rotating about the second axis AX2 . The urging unit 230 may energize the tube 240 so that the tube 240 is compressed at the contact point when contacting the curved section of the tube 240 .

The force unit 230 may include a plurality of rollers. When the driving unit 200 is driven, at least one force unit may be disposed in the curved section. More preferably, when the force unit 230 rotates, at least two or more force units may form force points in a curved section.

As described above, at a point where the urging portion of the urging unit 230 and the tube 240 come into contact, the tube is compressed by the urging portion, so that the inner sectional area of the tube 240 is zero. Since at least two stress points are formed in the curved section, a fixed amount of liquid medicine may be discharged according to the rotation angle of the second rotation member 222 .

The tube 240 is disposed adjacent to the rotating unit 220, and at least a part thereof may have a curved section extending in a circumferential direction. The tube 240 is made of a flexible material and can be compressed by the force unit of the force unit 230 .

The tube 240 may be installed between the reservoir assembly 100 and the needle assembly 400 and pass through the rotation unit 220 . A portion of the tube 240 may extend in a circumferential direction of the second rotating member 222 .

One end of the tube 240 is connected to the first conduit PI1 so that the liquid medicine in the reservoir 110 can move. The other end of the tube 240 may be connected to the second conduit PI2 and discharged through a needle of the needle assembly 400 .

The drive piece 250 may be disposed between the drive module 300 and the rotation unit 220 to transmit driving force generated by the drive module 300 to the rotation unit 220 . The drive piece 250 is connected to the drive shaft 310 and may linearly reciprocate according to the movement of the drive shaft 310 .

As the driving module 300 , all types of devices having a power to suck in the chemical solution and to discharge the chemical solution by electricity may be used.

For example, all types of pumps such as mechanical displacement micropumps and electromagnetic motion micropumps may be used as the driving module 300 . 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.

In the drug solution injection device 10, the drug solution D is discharged from the reservoir 110 to the needle assembly 400 by driving the driving unit 200. When the driving force generated by the driving module 300 is transmitted to the driving unit 200, the rotation unit 220 of the driving unit 200 rotates, and the force unit 230 applies pressure to the tube, while the chemical solution D move the

That is, the reservoir assembly 100 does not have an additional component for moving the plunger 120. By rotation of the force unit 230, the chemical solution D may be discharged from the reservoir 110 to the needle. Therefore, since a complicated mechanism for driving the plunger 120 is not required, the reservoir assembly 100 can be compactly configured. In addition, since the compact reservoir assembly 100 is provided, the overall size of the chemical solution injection device 10 can be reduced.

Since the reservoir assembly 100 is applied with a constant pressure from the outside, it is possible to discharge the chemical solution in a fixed amount. In the reservoir assembly 100, the front side of the plunger 120 is in contact with the chemical liquid, and the rear side is in communication with the outside, so that the external atmospheric pressure exerts pressure on the rear side. As a result, when a certain driving force is transmitted from the drive unit 200, a certain amount of the chemical solution D may be discharged through the needle.

10 is a view showing another embodiment of the reservoir assembly of the present invention.

Referring to FIG. 10 , a reservoir assembly 100D is similar to the reservoir assembly 100 of the above-described embodiment. However, there is a difference in the driving mechanism for driving the plunger 120D, which will be mainly described.

The plunger 120D is connected to the driving shaft DX, and the driving shaft DX may be selectively connected to the driving module 300 by a clutch. When the clutch is activated, the driving shaft DX can receive the driving force generated by the driving module 300 . The plunger 120D moves backward according to the injection of the chemical solution, but moves forward when the driving force generated from the driving module 300 is transmitted to the drive shaft DX, and discharges the chemical solution.

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.

1: liquid medicine injection system
10: chemical solution injection device
110: reservoir
120: plunger

Claims (5)

a reservoir providing a storage space for chemical liquid therein, having an opening through which the chemical liquid can flow is formed at the front thereof, and a protrusion disposed on an inner circumferential surface of the reservoir; and
A plunger disposed inside the reservoir and supported by the protrusion to set an initial position; Reservoir assembly comprising a.
According to claim 1,
The reservoir
An inlet end through which the chemical liquid is injected and an outlet end connected to a needle assembly and discharged through which the chemical liquid is discharged,
Wherein the protrusion is disposed adjacent to at least one of the inlet end and the outlet end.
According to claim 1,
The plunger,
A reservoir assembly having a; groove into which the protrusion is inserted on the outer circumferential surface.
According to claim 1,
The plunger
A reservoir assembly supported by the protrusion to maintain an initial position at the front of the reservoir, and moving to the rear of the reservoir when the chemical liquid flows into the reservoir.
a reservoir assembly in which a liquid medicine is stored;
a needle assembly connected to the reservoir assembly and discharging the liquid medicine; and
a driving unit connected to the reservoir assembly and moving the liquid medicine from the reservoir to the needle assembly when driven; include,
The reservoir assembly,
a reservoir that provides a storage space for the chemical solution therein, has an opening through which the chemical solution can flow, and a protrusion formed on an inner circumferential surface thereof; and
A plunger disposed inside the reservoir and supported by the protrusion to set an initial position.

Images