KR20240082280A - Reservoir assembly and apparatus for infusing medical liquid comprising the same - Google Patents

Abstract

One embodiment of the present invention provides a storage space for a chemical liquid inside, an opening through which the chemical liquid can flow is formed in the front, and a reservoir is disposed inside the reservoir, wherein the protrusion is disposed on the inner circumferential surface. A reservoir assembly including a plunger whose initial position is set by being supported may be provided.

Description

Reservoir assembly and apparatus for infusing medical liquid comprising the same}

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

Generally, a drug injection device such as an insulin injection device is used to inject a drug solution into a patient's body. These chemical injection devices are sometimes used by professional medical staff such as doctors and nurses, but in most cases, they are used by the general public, such as patients themselves or their guardians.

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

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

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

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

As a means to achieve the above-mentioned technical problem, the reservoir assembly according to an embodiment of the present invention provides a storage space for a chemical liquid inside, an opening through which the chemical liquid can flow is formed in the front, and a protrusion is formed on the inner peripheral surface. It may include a reservoir disposed inside the reservoir and a plunger whose initial position is set by being supported on the protrusion.

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

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

In one embodiment, the plunger is supported by the protrusion and maintains its initial position in front of the reservoir, but may move to the rear of the reservoir when the chemical solution flows into the reservoir.

A chemical injection device according to an embodiment of the present invention includes a reservoir assembly in which a chemical liquid is stored, connected to the reservoir assembly, connected to a needle assembly that discharges the chemical liquid, and the reservoir assembly, and when driven, the reservoir assembly is connected to the reservoir assembly. It includes a driving unit that moves the chemical liquid from the burr to the needle assembly, wherein the reservoir assembly provides a storage space for the chemical liquid therein, has an opening through which the chemical liquid flows is formed at the front, and has a protrusion on the inner peripheral surface. It may include a formed reservoir and a plunger disposed inside the reservoir and supported on the protrusion to set an initial position.

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

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

1 is a block diagram showing a chemical injection system according to an embodiment of the present invention.
Figure 2 is a perspective view showing a chemical injection device according to an embodiment of the present invention.
Figure 3 is a side cross-sectional view of a reservoir assembly according to an embodiment of the present invention.
Figure 4 is an enlarged view of part A of Figure 3.
FIG. 5 is a diagram showing protrusions in an embodiment different from FIG. 4.
FIG. 6 is a diagram showing a projection of FIG. 4 and another embodiment.
FIG. 7 is a diagram showing a state in which a predetermined chemical solution is injected in FIG. 3.
FIG. 8 is a diagram showing a state in which the maximum amount of chemical solution in FIG. 3 has been injected.
Figure 9 is a perspective view showing a driving unit and a driving module according to an embodiment of the present invention.
Figure 10 is a diagram showing another embodiment of the reservoir assembly of the present invention.

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

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

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

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

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

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

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

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

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

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

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

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

The user terminal 20 may receive an input signal from the user to drive and control the chemical injection system 1. The user terminal 20 can generate a signal that drives the controller 30 and control the controller 30 to drive the chemical injection device 10. Additionally, the user terminal 20 can display biometric information measured from the biometric information sensor 40 and status information of the chemical injection device 10 .

The user terminal 20 refers to a communication terminal that can be used in a wired or wireless communication environment. For example, the user terminal 20 includes a smartphone, a tablet PC, a PC, a smart TV, a mobile phone, a personal digital assistant (PDA), a laptop, a media player, a micro server, a global positioning system (GPS) device, an e-book terminal, It may be a digital broadcasting terminal, navigation, kiosk, MP3 player, digital camera, home appliance, camera-equipped device, and other mobile or non-mobile computing devices. Additionally, the user terminal 2 may be a wearable device such as a watch, glasses, hair band, or ring equipped with a communication function and data processing function. However, as described above, terminals equipped with applications capable of Internet communication can be borrowed without limitation.

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

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

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

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

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

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

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

The user terminal 20, the controller 30, and the chemical injection device 10 may communicate using a network. For example, networks include Local Area Network (LAN), Wide Area Network (WAN), Value Added Network (VAN), mobile radio communication network, satellite communication network, and their It is a comprehensive data communication network that includes mutual combinations and allows each network member to communicate smoothly with each other, and may include wired Internet, wireless Internet, and mobile wireless communication networks. In addition, wireless communications include, for example, wireless LAN (Wi-Fi), Bluetooth, Bluetooth low energy, ZigBee, WFD (Wi-Fi Direct), UWB (ultra wideband), and infrared communication (IrDA). Data Association), NFC (Near Field Communication), 5G, etc., but are not limited to these.

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

Referring to FIG. 2, the drug injection device 10 is attached to the user to inject the drug, and can inject the drug stored inside in a fixed amount set to the user.

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

One embodiment of the chemical injection device 10 may include a housing 11 covering the outside and an attachment portion 12 located adjacent to the user's skin. The chemical injection device 10 includes a plurality of parts disposed in the internal space between the housing 11 and the attachment portion 12. A separate joining means may be further interposed between the attachment portion 12 and the user's skin, and the chemical injection device 10 may be fixed to the skin by the joining means.

The chemical injection device 10 may include a reservoir assembly 100, a drive unit 200, a drive module 300, a needle assembly 400, a battery, etc.

FIG. 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 portion A of FIG. 3.

Referring to FIGS. 3 and 4, the reservoir assembly 100 stores a chemical liquid in at least a portion of the internal space, and uses the driving force generated by the operation of the drive unit and drive module, which will be described later, to transfer the chemical liquid to the needle assembly. It can be discharged in fixed quantities.

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

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

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

The reservoir 110 may have an inlet end 112 and an outlet end 113 formed at the front through which the chemical solution can flow. The chemical solution flows into the internal 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. In the drawing, the reservoir 110 is shown with an inlet end 112 and an outlet end 113 formed at the front, but an opening is formed at the front of the reservoir 110, and the opening is through which the chemical solution is injected. 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 through the inlet end 112 from leaking out. In addition, the injection needle LF can be inserted through the packing member 112a and the chemical solution can be injected.

The packing member 112a may have reclosable properties. For example, even if the injection needle (LF) is removed after invading the packing member (112a) in order to fill the reservoir 110 with a chemical solution, the packing member (112a) is infiltrated by the injection needle (LF). It is possible to prevent the chemical solution from leaking through one part.

The packing member 112a may be made of a material containing polypropylene, thermoplastic elastomer, vegetable oil, etc. The injected chemical solution may flow into the internal space of the reservoir 110 by pushing the plunger 120 backward, thereby forming a storage space.

A conduit 113a is connected to the outlet end 113, and the reservoir 110 may be connected to the driving 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.

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

The outer peripheral surface of the plunger 120 is in close contact with the inner peripheral surface of the reservoir 110 to prevent the chemical solution stored in the storage space from leaking. For example, the plunger 120 may be made of an elastic material such as rubber or silicon, and may be in close contact with the inner peripheral surface of the reservoir 110.

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

The reservoir 110 may have a protrusion 117 formed on its inner peripheral 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 rearward by the chemical solution flowing into the reservoir 110.

The protrusion 117 may be disposed inside the reservoir 110 and protrude from the inner peripheral surface of the reservoir 110. For example, the protrusion 117 may be formed to protrude in an annular shape from the inner peripheral 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 solution is injected into the reservoir 110, the plunger 120 may be positioned in front of the reservoir 110 in an initial position with its front face in close contact with the reservoir 110. When the chemical liquid is injected into the reservoir 110, the plunger 120 may move from the front to the rear due to the injected chemical liquid. Then, when all of the chemical solution is injected, the plunger 120 may stop moving and be located at the final position behind the reservoir 110.

If, before the chemical solution is injected into the reservoir 110, a pressure change occurs inside the chemical solution injection device due to injection of sterilizing gas, or vibration or impact is applied to the chemical solution injection device, the plunger 120 moves to its initial position. As the front surface separates from the reservoir 110, gas may flow 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 preset capacity, which may cause a problem in which a fixed amount of the chemical 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 may be 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 of the plunger 120 is not spaced apart from the reservoir 110 until the chemical solution is injected into the user, thereby maintaining the amount of chemical solution that can be stored in the storage space. can be kept constant.

Referring to FIG. 4, the protrusion 117a protruding from the inner peripheral surface of the reservoir 110 may have curved front and rear surfaces. For example, the protrusion 117a may have a side cross-section of a circular or oval shape. When a plurality of grooves 121 are formed on the outer peripheral surface of the plunger 120, the protrusion 117a may be formed to be inserted into the groove 121 formed at the forefront.

Figure 5 is a view of a projection of an embodiment different from Figure 4.

Referring to FIG. 5 , a plurality of protrusions 117b may be formed to protrude from the front of the reservoir 110 . The plurality of protruding protrusions 117b may be respectively inserted into the plurality of grooves 121 formed on the outer peripheral surface of the plunger 120 to maintain the initial position of the plunger 120. The plunger 120 can maintain its initial position more stably by forming a plurality of protrusions 117b and grooves 121.

Figure 6 is a view of a projection of Figure 4 and another embodiment.

Referring to FIG. 6, the protrusion 117c may be formed with a greater curvature at the front than at the rear. Since the front curvature of the protrusion 117c is greater than that of the rear, the protrusion 117c restricts the plunger 120 from moving backward, while relatively easily allowing the plunger 120 to move forward. Accordingly, the protrusion 117c prevents 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 completely discharged.

The sensor unit is configured to detect that a chemical solution is injected into the reservoir 110, and can transmit a signal generated by the movement of the plunger 120 within the reservoir 110 to the controller. The sensor unit can be connected to a flexible printed circuit board (FPCB), through which it can be electrically connected to the controller.

The sensor unit may be provided as a variety of sensors capable of sensing the position of a component, such as an optical sensor or 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 location outside the reservoir 110. The sensor unit can identify the position of the plunger 120 by generating a signal based on the magnetic force formed between the magnetic member 141 and the magnetic sensing member 142.

FIG. 7 is a diagram showing a state in which a predetermined chemical solution is injected in FIG. 3, and FIG. 8 is a diagram showing a state in which the maximum chemical solution is injected in FIG. 3.

With reference to FIGS. 3 and 7 to 8 , the operation of the reservoir assembly 100 can be described. Figure 3 shows a state before the chemical solution (D) flows into the reservoir 110, Figure 7 shows a state before a certain chemical solution (D) flows into the reservoir 110, and Figure 8 shows the state before the chemical solution (D) flows into the reservoir 110. ) can indicate a state in which a fixed amount of chemical solution (D) has been introduced.

As shown, an inlet end 112 and an outlet end 113 may be formed in front of the reservoir 110. A plunger 120 equipped with a magnetic member 141 is inserted into the inner space of the reservoir 110, and the front of the plunger 120 may be directed toward the inlet end 112 and the outlet end 113.

Before the chemical solution is injected, the plunger 120 may be positioned in an initial position where the front surface is in close contact with the reservoir 110. At this time, the protrusion 117 may be inserted into the groove 121 to allow the plunger 120 to maintain its initial position. For example, the protrusion 117 may protrude in an annular shape from the inner peripheral surface of the reservoir 110 and may be inserted into the groove 121 formed in an annular shape on the outer peripheral 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.

<The process in which the chemical solution (D) flows into the reservoir 110>

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

Referring to FIG. 3, in the initial state before the chemical solution (D) flows into the reservoir 110, the plunger 120 is a reservoir in which the front of the plunger 120 is formed with an inlet end 112 and an outlet end 113. It may be located at a 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 internal 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 of the plunger 120, thereby preventing gas from flowing into the internal space.

Referring to FIG. 7, as the chemical solution D is injected, the plunger 120 may move backward from the first position P-1 to form a storage space. While the plunger 120 moves 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 located 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 as the plunger 120 moves 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 maximum, that is, when the plunger 120 is in the second position (P-2), the controller controls the reservoir ( It can 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.

When recognizing that the chemical solution D is stored in the reservoir 110 as a set first reference amount, the controller can AWAKE the chemical injection device in the first mode. That is, the controller can confirm that a certain amount of chemical solution D is stored in the reservoir 110 and start some operation to preheat the chemical injection device. also. The user may be notified through the user terminal 20 or the like that a preset first reference amount of the chemical solution D is stored in the reservoir 110, thereby informing the user in advance to use the chemical injection device.

Referring to FIG. 8, due to the inflow of the chemical solution (D), the plunger 120 moves to the rear of the reservoir 110, and when a fixed amount of the chemical solution (D) flows into the reservoir 110, it moves to the first position ( It can stop at the third position (P-3) after moving the third distance (L3) from P-1). At this time, the storage space can be maximized.

Afterwards, the controller can inject the drug solution (D) into the patient in the second mode.

<The process in which the chemical solution (D) is discharged from the reservoir (110) to the needle>

By reversing the order 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) begins, 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 solution (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 generated. It can be maximum. At this time, the controller may recognize the event as a specific event of the reservoir assembly 100 and activate the third mode.

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

The second reference amount can be defined as the amount of chemical solution (D) set by the controller at the time of operation in the third mode. The controller informs the user that the amount of chemical solution D remaining in the reservoir 110 is a preset second standard 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 chemical solution D actually stored in the 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 ( Since the maximum value of the magnetic force formed between 141) and the magnetic sensing member 142 is the same, the first reference amount and the second reference amount can 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 equal to the amount of chemical solution D stored in the reservoir 110. However, the second reference amount is the amount of chemical solution (D) recognized by the controller at the point when the third mode starts (the plunger 120 passes the second position (P-2)), and is actually stored in the reservoir 110. It can be set to be less than the amount of remaining chemical solution (D).

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

Since the remaining amount of the chemical solution (D) is important in the third mode, the controller can very accurately calculate the injection amount of the chemical solution (D) and the remaining amount of the chemical solution (D) in the reservoir 110 in the third mode. In the third mode, based on data acquired from an encoder, etc., the controller accurately measures the rotation angle of the drive unit and the moving distance of the plunger 120, and determines the discharge amount of the chemical solution (D) and the chemical solution ( D) The quantity can be calculated precisely. In the third mode, the accurately calculated residual amount of the chemical solution (D) is delivered to the user in real time, so that the user can recognize the risk.

In one embodiment, the chemical injection device can accurately count the amount of chemical solution D remaining in the reservoir 110 only in the third mode. In the second mode, the amount of chemical solution (D) stored in the reservoir 110 exceeds the preset range (i.e., the second reference amount), so the amount of chemical solution (D) in the reservoir 110 is not precisely counted. In the third mode, the amount of chemical solution (D) stored in the reservoir 110 can be counted quantitatively. Since the amount of chemical solution (D) stored in the chemical solution injection device is precisely counted only at a level that requires an alarm, the control load of the chemical solution injection device can be reduced.

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

The chemical injection device and reservoir assembly 100 according to an embodiment of the present invention moves the plunger 120 so that the plunger 120, which moves according to the flow of the chemical liquid, does not move from its initial position due to other factors. By limiting it, a fixed amount of chemical solution can be provided to the user.

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

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

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

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

The base 210 supports the driving unit 200 and may form an exterior appearance. In the base 210, 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.

The base 210 may be provided with a guide portion 215. The guide portion 215 extends along the circumferential direction of the second rotation 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 the curved section of the tube 240. Additionally, another part of the guide portion 215 may extend to a straight section of the tube 240.

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

In one embodiment, the guide unit 215 may be disposed outside the curve section, and the area where the force unit 230 forces the tube 240 may be disposed inside the curve section.

In the drawing, an embodiment is shown in which the guide unit 215 is disposed on the outside of the tube 240 and the force unit 230 is disposed on the inside of the tube 240, but this is not limited to this, and in another embodiment, the guide unit is It is placed on the inside of the tube, and the forcing unit can be placed on the outside of the tube.

The rotation unit 220 is mounted in front of the base 210 and can rotate by receiving driving force from the drive module 300. The rotation unit 220 contacts the end of the driving piece 250 and can 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 that receives driving force from the driving module 300 and rotates at least some components to rotate the force unit 230.

In one embodiment, the rotation unit 220 may have a plurality of members drivenly connected to each other. The rotation unit 220 may include a first rotation member 221 and a second rotation member 222.

The first rotation 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 rotation member 222 is connected to the first rotation member 221 and can rotate according to the rotation of the first rotation member 221. The second rotation member 222 has a plate shape and can rotate about 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 second rotation member 222 rotates and the chemical liquid inside the tube 240 is discharged in a fixed amount according to the rotation angle of the force unit 230. 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 force the tube 240 while rotating about the second axis AX2. When contacting a curved section of the tube 240, the force unit 230 may force the tube 240 so that the tube 240 is compressed at the point of contact.

The force unit 230 may be provided with a plurality of rollers. When the driving unit 200 is driven, at least one force portion may be disposed in the curve section. More preferably, when the force unit 230 rotates, at least two force units may form a force point in the curved section.

As described above, at the point where the force portion of the force unit 230 and the tube 240 contact, the tube is compressed by the force portion, so that the internal cross-sectional area of the tube 240 is zero. Since at least two force points are formed in the curve section, a fixed amount of chemical solution can be discharged according to the rotation angle of the second rotation member 222.

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

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

One end of the tube 240 is connected to the first conduit (PI1), so that the chemical solution in the reservoir 110 can move. The other end of the tube 240 is connected to the second conduit (PI2) and can be discharged to the needle of the needle assembly 400.

The driving piece 250 is disposed between the driving module 300 and the rotation unit 220 and can transmit the driving force generated by the driving module 300 to the rotating unit 220. The drive piece 250 is connected to the drive shaft 310 and can make a linear reciprocating motion according to the movement of the drive shaft 310.

The driving module 300 can be any type of device that has chemical suction power and chemical discharge power by electricity.

For example, the driving module 300 can be any type of pump, such as a mechanical displacement micropump and an electromagnetic motion micropump. A mechanical displacement micropump is a pump that uses the movement of solids or fluids, such as gears or diagrams, to create a pressure difference to induce the flow of fluid, and is called a diaphragm displacement pump or fluid displacement pump. ), rotary pump, etc. Electromagnetic micropumps are pumps that use energy in the form of electricity or magnetism directly to move fluid, and include electrohydrodynamic pumps (EHD), electroosmotic pumps, and magnetohydrodynamic pumps ( Magneto hydrodynamic pump, electro wetting pump, etc.

The chemical solution injection device 10 discharges the chemical solution D from the reservoir 110 to the needle assembly 400 by driving the driving unit 200. When the driving force generated in 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 forces the tube, and the chemical solution (D) Move .

That is, the reservoir assembly 100 has no additional configuration for moving the plunger 120. By rotating the force unit 230, the chemical solution (D) may be discharged from the reservoir 110 to the needle. Accordingly, since a complicated mechanism for driving the plunger 120 is not required, the reservoir assembly 100 can be configured compactly. Additionally, since the compact reservoir assembly 100 is provided, the overall size of the chemical injection device 10 can be reduced.

Since a constant pressure is applied from the outside to the reservoir assembly 100, the chemical solution can be discharged in a fixed amount. The front of the reservoir assembly 100 is in contact with the chemical liquid, and the rear of the plunger 120 is in communication with the outside, so that external atmospheric pressure applies to the rear. Therefore, when a certain driving force is transmitted from the driving unit 200, a certain amount of chemical solution D can be discharged to the needle.

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

Referring to FIG. 10, the reservoir assembly 100D is similar to the reservoir assembly 100 of the above-described embodiment. However, since there is a difference in the driving mechanism for driving the plunger 120D, the explanation will focus on this.

The plunger 120D is connected to the drive shaft DX, and the drive shaft DX may be selectively connected to the drive module 300 by a clutch. When the clutch is activated, the drive shaft DX can receive the driving force generated by the drive module 300. The plunger 120D moves backward according to the injection of the chemical solution, but moves forward when the driving force generated by the drive 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 the scope of the claims described below, as well as all scopes equivalent to or equivalently changed from the claims, are within the scope of the spirit of the present invention. It will be said that it belongs.

1: Chemical injection system
10: Chemical injection device
110: reservoir
120: plunger

Claims (5)

a reservoir that provides a storage space for the chemical solution inside, has an opening in the front through which the chemical solution can flow, and has protrusions disposed on the inner circumferential surface; and
A plunger disposed inside the reservoir and set to an initial position by being supported on the protrusion.
According to claim 1,
The reservoir is
It has an inlet end through which the chemical solution is injected, and an outlet end connected to the needle assembly and through which the chemical solution is discharged,
The reservoir assembly 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 including a groove into which the protrusion is inserted on the outer peripheral surface.
According to claim 1,
The plunger is
A reservoir assembly that is supported by the protrusion and maintains its initial position in front of the reservoir, but moves to the rear of the reservoir when the chemical liquid flows into the reservoir.
a reservoir assembly in which the chemical liquid is stored;
a needle assembly connected to the reservoir assembly and discharging the chemical solution; and
a driving unit connected to the reservoir assembly and moving the chemical solution from the reservoir to the needle assembly when driven; Contains,
The reservoir assembly,
a reservoir that provides a storage space for the chemical solution inside, has an opening in the front through which the chemical solution can flow, and has protrusions formed on its inner peripheral surface; and
A plunger disposed inside the reservoir and set to an initial position by being supported on the protrusion.

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