Fully Automatic Portable Drug Delivery Pump

Abstract

The fully automatic portable drug delivery pump (1000) provided in the present invention comprises a motor unit (100) that provides rotational power, a gear unit (200) that is positioned adjacent to the motor unit and controls and transmits the rotational speed and rotational force provided by the motor unit, a pumping unit (300) that is positioned adjacent to the gear unit and receives the rotational force controlled through the gear unit to control the injection of the drug solution, a syringe unit (500) that stores and provides the drug solution, a needle injection unit (600) that injects the drug solution by triggering the injection of the needle (650) and cannula (660) to the patient by the initial rotation of the pumping unit operated by the motor unit, a hose unit (400) that is coupled in a replaceable form to the syringe unit and the needle injection unit and receives pressure from the syringe unit by the pumping unit to deliver the drug solution to the needle injection unit, a battery unit (700) that provides power and accommodates at least one pair of battery groups, and a housing unit (900) that includes a fixed and detachable bottom unit (970) and a cover unit (980).

Description

Technology Field

[0001] The present invention is an automatic portable drug delivery pump. More specifically, it relates to a wearable, reusable portable insulin pump capable of administering insulin. Background Technology

[0003] Conventional patch-type insulin pumps include models that require manual force to insert the needle-cannula into the patient's body to administer the medication. Additionally, there are products equipped with mechanical and electrical mechanisms that operate automatically via an electric powertrain using a smartphone app.

[0005] Wireless portable insulin pumps are designed to be discarded after a single use. This results in the disposal of the entire device, including the electronic board, which is designed for semi-permanent use. This can lead to problems of resource waste and increased costs.

[0007] Conventional insulin pumps use a method of indirectly calculating the remaining volume of the medication by utilizing electrical output information from the control drive unit. This method may have limitations in accurately determining the remaining volume.

[0009] Furthermore, conventional patch-type insulin pumps calculate the remaining capacity of the syringe storing the medication based on the electrical output for fluid control, rather than detecting it through direct physical sensors. This can result in a discrepancy between the actual remaining capacity and the calculated capacity.

[0011] Therefore, existing insulin pumps require improvements in areas such as drug infusion methods, device reusability, and methods for determining remaining dosage. To address these issues, the introduction of new technologies or structures is required. Prior art literature

[0016] Republic of Korea Patent Publication No. 2023-0088618 The problem to be solved

[0017] In order to solve the above-mentioned problems, the objective of the present invention is to provide a fully automatic portable drug delivery pump that solves existing problems. means of solving the problem

[0020] The fully automatic portable drug delivery pump (1000) provided in the present invention comprises a motor unit (100) that provides rotational power, a gear unit (200) that is positioned adjacent to the motor unit and controls and transmits the rotational speed and rotational force provided by the motor unit, a pumping unit (300) that is positioned adjacent to the gear unit and receives the rotational force controlled through the gear unit to control the injection of the drug solution, a syringe unit (500) that stores and provides the drug solution, a needle injection unit (600) that injects the drug solution by triggering the injection of the needle (650) and cannula (660) to the patient by the initial rotation of the pumping unit operated by the motor unit, a hose unit (400) that is coupled in a replaceable form to the syringe unit and the needle injection unit and receives pressure from the syringe unit by the pumping unit to deliver the drug solution to the needle injection unit, a battery unit (700) that provides power and accommodates at least one pair of battery groups, and a housing unit (900) that includes a fixed and detachable bottom unit (970) and a cover unit (980).

[0022] In one embodiment, the pumping unit (300) may include a first rotor unit (310) and a second rotor unit (320), a plurality of rotating pins (330) connected to the first and second rotor units and partially compressing and releasing the hose unit (400) as the first and second rotor units rotate to pump the liquid medicine, a bearing (340) installed between the first and second rotor units and the plurality of rotating pins, a rotor connecting shaft (350) that receives power from the gear unit and connects the first and second rotor units, and a protruding pin (321) involved in triggering the needle injection unit.

[0024] In one embodiment, the needle injection unit (600) may include a cannula (660) for injecting a liquid medicine into a patient, a needle (650) for inserting the cannula under the patient's skin, a moving unit (630) for moving the needle and the cannula, a connector (640) for providing the liquid medicine to the cannula, a linear guide (620) for positioning the moving unit and guiding the direction of movement of the moving unit, a torsion spring (670) for providing the moving force of the moving unit, a trigger pin (692) for initiating triggering by a protruding pin of the pumping unit, and a fixing pin (695) connected to the trigger pin and fixing and releasing the tension of the torsion spring.

[0026] In one embodiment, it may further include a tension spring (693) that provides a restoring force to a fixing pin, and a spring connecting part (694) that receives a restoring force from the tension spring and operates the fixing pin by the restoring force.

[0028] In one embodiment, the moving part (630) uses the rotational force provided by the torsion spring as power to move the needle and cannula downward through a slide crank mechanism and can return only the needle, excluding the cannula, to its original position.

[0030] In one embodiment, the device further includes a cannula holder (665) for receiving a cannula (660) and a horizontal moving bar (680) located in front of the moving part, and after the cannula is moved downward by triggering, the cannula holder can be fixed between the bottom part of the housing part and the horizontal moving bar.

[0032] In one embodiment, the syringe portion (500) may include a syringe (510) for storing a liquid medicine, an outlet (520) for discharging the liquid medicine, a sealing portion (531) for sealing to prevent leakage of the liquid medicine, a holder portion (532) which is a structure for holding the sealing portion, and a plunger (530) for sealing the syringe.

[0034] In one embodiment, the plunger (530) may further include a magnetic part (533) that provides magnetic force to the outside, an interlocking magnetic part (535) located outside the syringe and interlocking magnetic part of the plunger with magnetic force, and a resistor (536) formed by electrical contact with the interlocking magnetic part.

[0036] In one embodiment, the housing portion (900) may further include an internal structural plate (960) and a PCB board (800) that accommodate a motor portion, a gear portion, a pumping portion, a syringe portion, a needle injection portion, a hose portion, and a battery portion.

[0038] In one embodiment, the battery portion (700) may include a pair of first electrodes (711) that penetrate an internal structural plate and are electrically connected, and a second electrode (712) that penetrates the internal structural plate, is electrically insulated from the first electrodes, and is located between the pair of first electrodes.

[0040] In one embodiment, it may further include a first connecting electrode (715) connecting the PCB substrate and the first electrode under the internal structure plate and a second connecting electrode (714) connecting the PCB substrate and the second electrode.

[0042] In one embodiment, it may further include a motor connection electrode (721) that penetrates the internal structural plate, is fixed by an insulating part (722), and is electrically connected to the motor part by elasticity.

[0044] In one embodiment, the first rotor part and the second rotor part may each include a first rotor connecting part (313) and a second rotor connecting part (323) that are coupled to interlock to form a rotor connecting shaft.

[0046] In one embodiment, the first rotor portion and the second rotor portion may include bearing cover fixing grooves (314, 324).

[0048] In one embodiment, the connector (640) of the needle injection part may include a barb-shaped structure.

[0050] In one embodiment, the discharge port (520) of the syringe portion may include a barb-shaped structure.

[0052] In one embodiment, an O-ring portion (990) may be further included at the portion where the bottom portion (970) and the cover portion (980) are joined to maintain airtightness from the outside.

[0054] In one embodiment, the hose portion, syringe portion, and needle injection portion may be replaceable. Effects of the invention

[0058] According to the present invention, the process of inserting a needle into a patient can be carried out by an automated process. By simply attaching the device to the patient's skin and turning on the power, the cannula of the drug injection device is automatically inserted into the patient's skin.

[0060] The fully automatic portable drug delivery pump of the present invention is manufactured with replaceable components. Therefore, even if a component fails, reaches the end of its lifespan, or causes other problems, the part can be simply replaced, allowing for economical and long-term product use.

[0062] Meanwhile, by applying a separable electrode inserted into the slit, changes to the battery configuration can be flexibly applied even if changes to the battery configuration occur due to changes in the product's configuration requirements.

[0064] In addition, measuring the liquid volume of a syringe mechanically using external magnetic force and resistance values ​​can accurately identify problems in the liquid delivery process and has the advantage of accurately measuring the volume in real time compared to conventional rotation speed measurement methods. Brief explanation of the drawing

[0068] FIGS. 1a and 1b are drawings showing the configuration of an automatic portable drug delivery pump according to one embodiment of the present invention. FIG. 2 is a drawing showing the motor part (100), gear part (200), and pumping part (300) of an automatic portable drug delivery pump (100) according to an embodiment of FIG. 1 of the present invention. FIGS. 3a and 3b are drawings showing a pumping part (300) of an automatic portable drug delivery pump (100) according to an embodiment of FIG. 1 of the present invention. FIGS. 4a to 4c are drawings of a syringe portion (500) of an automatic portable drug delivery pump (100) according to an embodiment of FIG. 1 of the present invention and drawings for explaining the same. FIGS. 5a and 5b are drawings showing a needle injection part (600) of an automatic portable drug delivery pump (100) according to an embodiment of FIG. 1 of the present invention. FIGS. 6a to 6d are drawings for explaining the triggering of the needle injection part (600) of the fully automatic portable drug delivery pump (100) according to the embodiment of FIG. 1 of the present invention. FIGS. 7a to 7d are drawings showing the battery section (700) of an automatic portable drug delivery pump (100) according to an embodiment of FIG. 1 of the present invention. FIGS. 8a to 8c are drawings illustrating the housing portion (900) of an automatic portable drug delivery pump (100) according to an embodiment of FIG. 1 of the present invention. Specific details for implementing the invention

[0069] Hereinafter, preferred embodiments will be described with reference to the attached drawings. In this process, the thickness of lines or the size of components depicted in the drawings may be exaggerated for clarity and convenience of explanation. Furthermore, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intention or convention of the user or operator. Therefore, the definitions of these terms should be based on the content throughout this specification.

[0070] Furthermore, when it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0071] The singular expression includes the plural expression unless the context clearly indicates otherwise. Furthermore, throughout this specification, when a part is described as "comprising" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. It is obvious to those skilled in the art that the present invention may be embodied in other specific forms without departing from the essential features of the invention.

[0072] Furthermore, the following examples are presented merely as illustrations and do not limit the scope of the present invention, and various embodiments implemented through the technical concept may exist. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, like reference numerals refer to like elements.

[0076] Components of a fully automatic portable drug delivery pump

[0078] FIGS. 1a and 1b are drawings showing the configuration of an automatic portable drug delivery pump (1000) according to one embodiment of the present invention.

[0080] Referring to FIGS. 1a and 1b, the fully automatic portable drug delivery pump (1000) includes a motor part (100), a gear part (200), a pumping part (300), a hose part (400), a syringe part (500), a needle injection part (600), a battery part (700), a PCB board (800), and a housing part (900).

[0082] The motor unit (100) provides rotational power, and the gear unit (200) controls the number of rotations generated by the motor unit (100) and transmits it to the pumping unit (300). The pumping unit (300) controls the injection of the liquid medicine using the controlled rotational power, and the syringe unit (500) stores the liquid medicine and provides the liquid medicine to be injected by the pumping unit (300).

[0084] The needle injection unit (600) is triggered by the initial rotation of the pumping unit (300) as the motor unit (100) operates, and serves to inject the liquid medicine into the patient through the needle (650) and cannula (660). The hose unit (400) receives pressure from the syringe unit (500) through the pumping unit (300) and sends the liquid medicine to the needle injection unit (600), and the battery unit (700) supplies power to the device. The housing unit (900) is composed of a bottom unit (970) and a cover unit (980) to protect all components of the device and to enable fixing and detachment.

[0086] Referring again to FIG. 1a, the motor unit (100), the gear unit (200), and the pumping unit (300) must be installed in mechanically adjacent locations, and the needle injection unit (600) is located between the row where the syringe unit (500) is installed and the row where the motor unit (100), the gear unit (200), and the pumping unit (300) are installed. The battery unit is positioned on the side of the needle injection unit (600) and the motor unit (100).

[0088] If the mentioned functions can be performed, it is not necessary to force this arrangement, but the closer the motor unit (100) that generates power using the power of the battery unit (700) is to the circuit, the simpler the circuit configuration becomes, and the motor unit (100), gear unit (200), and pumping unit (300) are formed on one axis to ensure efficiency and stability of the mechanical structure.

[0090] The position of the syringe part (500) for storing the liquid medicine can be moved flexibly, but generally, the larger the storage space for the liquid medicine, the fewer times the patient needs to replace it, thus reducing the inconvenience. Therefore, it is better to increase the size of the syringe part (500) as much as possible. However, since the patient must attach the device, a device that is too large may cause inconvenience to the patient, so it is necessary to adjust the size considering portability and storage capacity.

[0092] Referring again to FIG. 1b, if we look at the configuration of the fully automatic portable drug delivery pump (1000) of the present embodiment in an unfolded view, it can be seen that it is configured in the order of a cover part (980), various main components (100, 200, 300, 400, 500, 600, 700), an internal structural plate (960), a PCB board (800), and a bottom part (970).

[0094] First, the main components, such as the motor section (100), gear section (200), pumping section (300), hose section (400), syringe section (500), needle injection section (600), hose section (400), and battery section (700), are housed in an internal structural plate (960). Meanwhile, a PCB board (800) is placed below the internal structural plate (960), and the PCB board (800) performs functions such as supplying power or measuring the remaining amount of liquid medicine. Finally, the bottom section (970) of the housing section (900) is housed below this PCB board (800) to complete a single package.

[0096] First, we will proceed with the explanation of the roles and functions of each component in sequence.

[0099] Motor part (100) and gear part (200)

[0101] FIG. 2 is a drawing showing the motor part (100), gear part (200), and pumping part (300) of an automatic portable drug delivery pump (100) according to an embodiment of FIG. 1 of the present invention.

[0103] Referring again to FIG. 2, the fully automatic portable drug delivery pump (1000) of the present embodiment includes a motor unit (100) and a gear unit (200). The motor unit (100) and the gear unit (200) are designed to provide an accurate amount of drug to be delivered to a patient. First, the motor unit (100) may be equipped with various motors, such as a stepping motor, an AC motor, a servo motor, or a DC motor.

[0105] In particular, in this embodiment, the application of a DC motor is preferred. The advantage of a DC motor is that it can be manufactured in a compact size; since the drug delivery pump must be manufactured as a portable device, the product can be implemented using a small motor. The disadvantage of a DC motor is that, unlike stepping motors which can control precise angles, it is controlled by changes in input voltage or current, so precise control may be difficult.

[0107] In this embodiment, a separate gear unit (200) is included in preparation for using a small DC motor. The gear unit (200) may use a plurality of reduction gears. By using a combination of reduction gears that can be applied among these, ultra-low speed reduction of 5000:1 to 10000:1 or more can be performed.

[0109] Therefore, if a reduction gear is applied together with a small DC motor, precise control can be achieved. In this embodiment, for example, by combining an ultra-low speed reduction gear of 100:1 or more with a low speed reduction gear of 50:1 or more or an intermediate reduction gear of 10:1 to 30:1, an ultra-low speed reduction ratio of 5000:1 to 10000:1 can be achieved, thereby enabling very precise injection of the liquid medicine.

[0113] Pumping unit (300)

[0115] FIGS. 3a and 3b are drawings showing a pumping part (300) of an automatic portable drug delivery pump (100) according to an embodiment of FIG. 1 of the present invention.

[0117] Referring to FIG. 2 and FIG. 3a and 3b, the pumping unit (300) receives power having a rotational speed reduced by a reduction gear from the gear unit (200) and uses this to pump so as to inject the liquid medicine. The pumping unit (300) includes a first rotor unit (310) and a second rotor unit (320), a plurality of rotating pins (330) connected to the first and second rotor units (310, 320) and partially compressing and releasing the hose unit to pump the liquid medicine as the first and second rotor units (310, 320) rotate, a bearing (340) installed between the first and second rotor units (310, 320) and the plurality of rotating pins (330), and a rotor connecting shaft (350) connecting the first and second rotor units (310, 320).

[0119] To explain the specific operation method, the first rotor section (310) and the second rotor section (320) rotate using power received from the gear section (200). In the drawing, the rotor connecting shaft (350) receives power from the gear section (200) and serves to connect the first rotor section (310) and the second rotor section (320). The hose section is formed of a flexible material and is positioned to be in tight contact with a plurality of rotating pins (330) placed between the first rotor section (310) and the second rotor section (320).

[0121] Since the multiple rotating pins (330) and the hose section are arranged in tight contact, the part where the rotating pin (330) and the hose section are in contact is folded by relative tensile force and the cross-section of the hose is closed, and the part of the hose section where the rotating pin (330) and the hose section are not in contact is opened by the original restoring force and contains a drug inside.

[0123] Consequently, in the area of ​​the hose section related to the pumping section (300), some parts of the hose cross-section are closed, and some parts are open to contain the drug inside. As these closed and open parts are rotated by the first and second rotor sections (310, 320), the drug can advance and move forward by a predetermined amount as it is sequentially pushed forward within the hose section.

[0125] At this time, the voltage and current provided to the motor of the motor unit (100) and the provision time are controlled to accurately implement the rotational speed of the motor, and the rotational speed reduced by the gear unit (200) is calculated to calculate the amount of drug to be injected at once and the rotational speed at which the motor of the motor unit (100) must rotate, thereby enabling the provision of an accurate amount of drug.

[0127] Referring to FIGS. 3a and 3b, first, the first rotor part (310) includes a rotation pin receiving groove (311) for receiving a rotation pin (330), a first rotor connecting component (313) for forming a rotor connecting shaft (350), and a bearing cover fixing groove (314). The second rotor part (320) includes a protruding pin (321) involved in triggering, a rotation pin receiving groove (322) for receiving a rotation pin (330), a second rotor connecting component (323) for forming a rotor connecting shaft (350), and a bearing cover fixing groove (324).

[0129] The first rotor connecting component (313) and the second rotor connecting component (323) are each formed by protruding from the center of the first rotor part (310) and the second rotor part (320), respectively, and are formed in a structure that interlocks with each other to form a rotor connecting shaft (350) by coupling.

[0131] The rotor connecting shaft (350) structure formed as a protruding structure prevents twisting in the direction of the rotation axis when fixed to the rotation axis and maintains the positions of the first rotor part (310) and the second rotor part (320) on both sides constant, thereby reducing the frictional force between the rotation pin and the rotor part and reducing the load when mounted as a hose part during rotation.

[0133] Meanwhile, the first rotor part (310) and the second rotor part (320) each include a bearing cover fixing groove (314, 324) so ​​that a cover to protect the bearing (340) can be additionally installed.

[0137] Hoss part (400)

[0139] Referring again to FIG. 1a, the hose section (400) is tightly positioned in close contact with the rotating pin (330) of the pumping section (300), one end is connected to the outlet (520) of the syringe section (500) to be described later, and the other end is connected to the connector (640) of the needle injection section (600), so that the liquid medicine stored in the syringe section (500) is delivered to the needle injection section (600) without coming into contact with other components.

[0141] Therefore, since the parts contacted by the liquid medicine are limited only to the hose part (400), syringe part (500), and needle injection part (600), there is an advantage in that only this configuration can be designed as a replaceable component, allowing other components to be reused.

[0145] Syringe part (500)

[0147] FIGS. 4a to 4c are drawings of a syringe portion (500) of an automatic portable drug delivery pump (100) according to an embodiment of FIG. 1 of the present invention and drawings for explaining the same.

[0149] Referring to FIG. 4a, this drawing illustrates a vertical cross-section in the longitudinal direction of the syringe portion (500). The syringe portion (500) includes a syringe (510) for storing a liquid medicine, an outlet (520) for discharging the liquid medicine, and a plunger (530) for sealing the syringe (510). If necessary, a syringe spring may be further included to provide elastic force to the liquid medicine storage space inside the syringe (510) through the plunger (530).

[0151] The plunger (530) has a sealing part (531) that seals to prevent leakage of the liquid medicine, and a holder part (532) which is a structure that holds the sealing part (531). Meanwhile, it further includes a magnetic part (533) that provides magnetic force to the outside.

[0152] The magnetic part (533) of the plunger (530) is located outside the plunger (510) and is coupled magnetically with the interlocking magnetic part (535).

[0154] Since the syringe part (500) must be sealed, the magnetic part (533) and the interlocking magnetic part (535) are magnetically connected to monitor the position of the internal plunger (530), and the position of the interlocking magnetic part (535) is measured to measure the amount of liquid medicine inside the syringe part (500).

[0156] Meanwhile, referring to FIG. 4b, the interlocking magnetic part (535) further includes a resistor (536) formed by electrically contacting the interlocking magnetic part (535). This is formed on a PCB substrate (800), and the measured value of the resistor (536) is transmitted as an electrical signal.

[0158] The resistor can be implemented using a patterning of carbon paste or a pattern of the PCB substrate (800). The interlocking magnetic part (535) is fixed in the left-right and up-down directions in a groove formed in the bottom and bottom portion (970) of the PCB substrate (800). Accordingly, the magnetic part (533) fixed to the plunger (530) is formed in a structure in which the magnet of the interlocking magnetic part (535) located at the outer bottom moves together with the movement of the plunger (530) to detect a change in resistance.

[0160] The magnetization direction of the magnetic part (533) fixed to the plunger (530) of the syringe part (500) forms NS poles based on the circular side, and the interlocking magnetic part (535) located at the bottom of the PCB board (800) forms NS poles in the vertical direction based on the circular side, so that when the magnet is fixed, it is stably fixed without twisting due to attraction.

[0162] Consequently, due to this magnetic interlocking structure, changes in the syringe plunger's position are linearly reflected as changes in electrical resistance, allowing for direct verification of the plunger's location. Since this measurement method physically measures the actual position of the liquid, it is significantly more accurate than methods based on the motor's accumulated rotational speed. Furthermore, because this physical measurement method can detect blockages that may occur during liquid injection, it enables automatic verification of whether the injection components are functioning normally.

[0164] Referring to FIG. 4c, the syringe portion (500) is connected to the hose portion (400), and the outlet (520) of the syringe portion (500) can be formed as an integral or insertable barb-type connector. A barb-type connector is a type of connector mainly used to connect hoses or tubes that transmit fluid, and has a structure in which the end portion has a plurality of protruding tooth-shaped protrusions (barbs). When a hose or tube is pushed into the connector, these protrusions serve to secure the barbs so that they do not get caught inside the hose and fall out. The same structure can be applied to the nipple injection portion (600) connector (640) described later.

[0166] Among the structures of the syringe part (500), the magnetic part (533) and the interlocking magnetic part (535) can be removed to reduce the overall weight. Even if these magnetic parts are removed, the pump can operate normally. Meanwhile, if the magnetic part (533) fixed to the plunger (530) is removed, the driving stroke of the plunger (533) is extended, thereby increasing the filling capacity. Conversely, to reduce the filling capacity, the diameter of the syringe (510) can be changed to a smaller type, and the height of the cover part (980) can be changed to reduce the overall height of the device. Additionally, when using a long syringe needle, the drug can be filled through the rubber packing mounted on the plunger (530).

[0168] The discharge port (520) is connected to one side of the hose section (400) and used, and in some cases, the discharge port (520) of the syringe section (500) and the hose section (400) may be provided as a single unit without a separate connection. In this case, the syringe section (500) and the hose section (400) can be replaced as a single unit. Depending on the implementation, it is also possible to provide the hose section (400) and the syringe section (500) together with the needle injection section (600), which will be introduced later, as a single package so that the components can be replaced at once.

[0172] Needle injection part (600)

[0174] FIGS. 5a and 5b are drawings showing a needle injection part (600) of an automatic portable drug delivery pump (100) according to an embodiment of FIG. 1 of the present invention.

[0176] Referring to FIGS. 5a and 5b, the needle injection unit (600) includes a cannula (660) for injecting a liquid medicine into a patient, a needle (650) for inserting the cannula (660) under the patient's skin, a moving unit (630) for moving the needle (650) and the cannula (660), a connector (640) for providing the liquid medicine to the cannula (660), a linear guide (620) for positioning the moving unit (630) and guiding the direction of movement of the moving unit (630), and a torsion spring (670) for providing the moving force of the moving unit (630). Meanwhile, the needle injection unit (600) further includes a trigger pin (692) that initiates triggering by the protruding pin (321) of the pumping unit (300), and a fixing pin (695) connected to the trigger pin (692) and fixing and releasing the tension of the torsion spring (670).

[0178] To describe each component in detail, first, the needle injection unit (600) includes a cannula (660) and a needle (650). The continuous injection of medication by insertion into the patient's skin is carried out through the cannula (660), and the needle (650) is used to initially insert the cannula (660) under the skin.

[0180] Typically, in such a liquid injection device, the needle (650) and the cannula (660) are provided in a combined form, and the cannula (660) is installed in such a way that after injection through the needle, the needle (650) is retrieved while leaving only the cannula (660), and this process is applied in the same manner.

[0182] The moving part (630) inserts a needle-cannula combined form so that the needle (650) and cannula (660) can be inserted through the patient's skin through downward movement and subsequent upward movement, and then proceeds with the process of retrieving only the needle (650).

[0184] The horizontal moving bar (680) is applied at this time. The horizontal moving bar (680) can be connected to a horizontal moving spring, and the horizontal moving spring provides elastic force in the lateral direction. The horizontal moving bar (680) serves to prevent the cannula holder (665) that accommodates the cannula (660) from moving backward by getting caught on the horizontal moving bar (680) when the needle-cannula moves forward and then backward.

[0186] The movement direction and fixation of the moving part (630) are carried out through the linear guide (620). The needle (650) and cannula (660) advance and retract by the direction and distance guided by the linear guide (620).

[0188] The connector (640) provides the liquid medicine dispensed from the hose portion (400) to the cannula (660) and enables the supply of the liquid medicine through the cannula (660) inserted into the patient. The connector (640) can be formed as an integral or insertable barb-type connector, similar to the outlet (520) of the syringe portion (500). This facilitates connection with the hose portion (400).

[0190] The torsion spring (670) is fixed to the needle base plate (691) and provides rotational force to allow rotation by a specified angle, which moves the needle (650) and cannula (660) downward through the slide crank mechanism and returns only the needle (650), excluding the cannula (660), to its original position. Typically, for this movement, the torsion spring (670) may be installed pre-rotated so that it can rotate by about 270 degrees. This can be controlled by inserting a rotation limiting pin (683) of the rotating plate (682) into an opening (621) contained within the linear guide (620) to limit the rotation radius of the rotating plate (382). This may vary depending on the travel distance of the moving part (630) and the configuration of the mechanical components applied to the slide crank.

[0192] In addition, it further includes a trigger part cover (696) covering the part related to triggering and a moving part cover (683) covering the part related to the needle (650) and cannula (660).

[0194] Referring again to FIGS. 5a and 5b, the nipple injection unit (600) of the present invention further includes a trigger pin (692) that initiates triggering by a protruding pin of the pumping unit, and a fixing pin (695) connected to the trigger pin and fixing and releasing the tension of the torsion spring. Meanwhile, for the operation thereof, it further includes a tension spring (693) that provides a restoring force to the fixing pin, and a spring connection unit (694) that receives a restoring force from the tension spring and operates the fixing pin by the restoring force.

[0196] As the second rotor (320) of the pumping unit (300) rotates, the protruding pin (321) lifts the trigger pin (692). This triggers the injection of the initial cannula (660). When the protruding pin (321) lifts the trigger pin (692) due to the rotation of the second rotor (320), it causes the trigger pin (692) to come out of the fixing groove (696) that holds it. As a result, the trigger pin (692) receives a moving force from the tension spring (693) and the spring connecting part (694) connected thereto, and moves the fixing pin (695). The fixing pin (695) is inserted into a groove in the rotating plate (682) and holds the rotating plate (682) in place. When the fixing pin (695) is released from the rotating plate (682), the rotating plate (682) is allowed to rotate by the rotational force provided by the torsion spring (670). This causes the slide crank mechanism to proceed.

[0198] Meanwhile, in this embodiment, a rotating ring (681) may be further included. The rotating ring (681) has an opening formed therein that allows for rotational angle, and this is coupled to a protrusion that is linked to the rotating plate (682) or the torsion spring (670), thereby mechanically limiting the range of rotation of the rotating plate (682) or the torsion spring (670). This entire process is performed automatically without human intervention.

[0201] FIGS. 6a to 6d are drawings for explaining the triggering of the needle injection part (600) of the fully automatic portable drug delivery pump (100) according to the embodiment of FIG. 1 of the present invention.

[0203] Referring to FIGS. 6a and 6b, as the second rotor (320) of the pumping unit (300) rotates, the protruding pin (321) is shown lifting the trigger pin (692). The trigger pin (692) comes out of the fixed groove (696), retracts the fixed pin (695), and advances the slide crank mechanism.

[0205] FIG. 6b is a drawing of the slide crank mechanism immediately before it proceeds. Thus, the moving part (630) is raised without descending, and the needle (650) and cannula (660) are not yet inserted into the patient.

[0207] FIG. 6c is a drawing immediately after the slide crank mechanism has been executed. Accordingly, the moving part (630) is lowered, and the needle (650) and cannula (660) are inserted into the patient. In this state, the trigger pin (692) is released from the fixed groove (696). Accordingly, the moving part (630) is moved downward by the rotation of the torsion spring (670), and at this time, the cannula (660) is simultaneously inserted under the patient's skin by the needle (650).

[0211] Fixation of the cannula

[0213] Referring to FIG. 6d, when the cannula holder (665) that accommodates the cannula (660) descends after the initial triggering, the cannula holder (665) comes into contact with the horizontal moving bar (680) according to the forward movement of the moving part, and the horizontal moving bar (680) is fixed by a compression spring and is initially aligned in contact with the cannula holder.

[0215] When the moving part (630) descends, the horizontal moving bar (680) is pushed backward by the forward movement of the cannula holder, and when the moving part (630) reaches the end position in the downward direction, the horizontal moving bar (680) passes the contact portion with the cannula holder (665). At this moment, the horizontal moving bar (680) advances again by the restoring force of the compression spring, and the cannula holder (665) is fixed in the horizontal and vertical directions between the bottom part (970) and the horizontal moving bar (680).

[0217] At this time, the horizontal moving bar (680) fixes only the cannula holder (665) that accommodates the cannula (660), and the needle (660) is not restricted from moving by the horizontal moving bar (680). As a result, the cannula (660) is inserted downward, and the moving part (630) is returned to the upward direction, and at this time, the needle (650) is restored to its original position. Only the cannula (660) is inserted into the patient's skin, and the situation is converted so that the liquid medicine can be injected into the patient at a constant rate through this cannula (660).

[0221] Battery unit (700)

[0223] FIGS. 7a to 7d are drawings showing the battery section (700) of an automatic portable drug delivery pump (100) according to an embodiment of FIG. 1 of the present invention.

[0225] The battery unit (700) provides power to the motor unit (100), PCB board (800), etc. The battery unit (700) may include at least one battery. Such batteries are manufactured in a replaceable form so that they can be removed and reinstalled when necessary. Preferably, they are arranged to accommodate a pair of battery groups. This ensures a long battery life.

[0227] Referring to FIGS. 7a through 7c, the battery unit (700) includes a pair of first electrodes (711) that penetrate the internal structural plate (960) and are electrically connected, and a second electrode (712) that penetrates the internal structural plate (960), is electrically insulated from the first electrodes (711), and is located between the pair of first electrodes (711). Additionally, the battery unit (700) includes a first connecting electrode (715) that connects the PCB substrate (800) and the first electrodes (711) and a second connecting electrode (714) that connects the PCB substrate (800) and the second electrodes (712) below the internal structural plate (960). The battery unit (700) may further include a motor connecting electrode (721) that penetrates the internal structural plate (960), is electrically connected to the motor unit (100).

[0229] The structure of the battery section (700) is a method of connecting the first electrode (711) and the second electrode (712), which are battery electrodes, to the PCB board (800). This is characterized by a structure in which, when the bottom section (970), the PCB board (800), and the internal structure board (960) are combined, the fixed electrodes are automatically aligned and connected to the PCB board (800) through a slit formed in the internal structure board (960). This method forms a series or parallel connection of batteries to form a parallel structure of 3V using four 1.5V batteries.

[0231] Referring to FIGS. 7c and 7d, the structure is characterized by a bottom portion (970), a PCB board (800), and an internal structural plate (960) being combined in a way that connects the electrode of the motor portion (100) to the PCB board (800), and the electrode structure fixed to the motor is automatically aligned and connected to the PCB board (800) through a slit formed in the internal structural plate (960). This can be implemented through the motor connection electrode (721). At this time, a method is used to fix a metal electrode patterned on an insulating material (e.g., plastic) by means of an insulating portion (722), and the electrode structure fixed to the motor portion (100) obtains the effect of being fixed together with the motor as the motor is fixed to the intermediate plate.

[0233] Meanwhile, the structure of the motor connection electrode (721) adopts a structure that is flexibly electrically connected to the PCB substrate (800) by the elasticity of the electrode itself. Therefore, by simply mechanically connecting the internal structure plate (960), the PCB substrate (800), and the bottom part (970) to each other, the motor connection electrode (721) and the PCB substrate (800) are electrically contacted, allowing power to be supplied. This effect applies equally to the first electrode (711) and the second electrode (712).

[0235] The structure of this battery section (700) is designed to allow for easy replacement with a different type of battery electrode structure even when the number of batteries is reduced due to a decrease in the weight of the insulin pump, a reduction in battery replacement costs, and a decrease in the amount of liquid injected, thereby providing a highly flexible connection method.

[0239] Housing structure

[0241] FIGS. 8a to 8c are drawings illustrating the housing portion (900) of an automatic portable drug delivery pump (100) according to an embodiment of FIG. 1 of the present invention.

[0243] Referring to FIGS. 8a through 8c, the fully automatic portable drug delivery pump (100) of the present embodiment includes a bolt (991) and a bolt fastening groove (992) included in the housing portion (900). It may include an external drug injection port (994) for injecting drugs from the outside. Meanwhile, an O-ring portion (990) capable of maintaining airtightness is further included in the portion where the bottom portion (970) and the cover portion (980) are joined. Additionally, a separate rubber stopper may be installed in the drug injection port (994) to prevent contamination.

[0245] The housing part (900) structure of the present invention can be designed so that the cover can be fixed or detached in various ways. In particular, since it is characterized by a function that allows internal parts to be replaced, the connection and separation of the outer housing can be easily achieved. Such connection methods may be designed as a detachable structure by applying a bolt / screw fastening method, a locking method using the elastic force of the structure, or a ballpoint pen pressing structure.

[0247] Meanwhile, the entire housing part (900) can be made into a completely fixed type using adhesive, ultrasonic welding, or heat bonding. This completely fixed type can reduce the possibility of product manipulation or the introduction of foreign substances from the outside. It is also possible to produce the device as a disposable product using economical materials.

[0249] Meanwhile, an O-ring portion (990) may be further included in the portion where the bottom portion (970) and the cover portion (980) are joined to maintain airtightness from the outside. The O-ring portion (990) may be secured by an O-ring fixing groove (991) formed in the area where the bottom portion (970) and the cover portion (980) are joined.

[0252] Although the embodiments have been described above with reference to the limited drawings, those skilled in the art can apply various technical modifications and variations based on the above. For example, appropriate results may be achieved even if the described techniques are performed in a different order than described, and / or if the components of the described system, structure, device, circuit, etc. are combined or assembled in a form different from the described method, or are replaced or substituted by other components or equivalents. Therefore, other implementations, other embodiments, and equivalents to the claims are also included within the scope of the claims set forth below. Explanation of the symbols

[0254] 100 : Motor section 200 : Gear section 300 : Pumping section 310: 1st rotor section 320: 2nd rotor section 321 : Protruding pin 323: Second rotor connecting component 330 : Rotating pin 340 : Bearing 350: Rotor connecting shaft 400 : Hose section 500 : Syringe 510 : Syringe 520 : Outlet 531 : Sealing part 532 : Holder part 533 : Magnetic section 535 : Interlocking magnetic part 536 : Resistor 600 : Needle injection part 620 : Linear guide 630 : Moving part 640 : Connector 650 : Needle 660 : Canula 665 : Cannula holder 680 : Horizontal movement bar 692 : Trigger pin 693 : Tension spring 694 : Spring connection 695 : Fixing pin 700 : Battery section 711: First electrode 712: Second electrode 714: Second connecting electrode 715: First connecting electrode 721: Motor connection electrode 900 : Housing section 960 : Internal structural plate 970 : Bottom part 980 : Cover part 990 : O-ring part 991 : O-ring fixing groove

Claims

Claim 1 A motor unit (100) providing rotational power; a gear unit (200) positioned adjacent to the motor unit (100) and controlling and transmitting rotational speed and rotational force provided by the motor unit (100); a pumping unit (300) positioned adjacent to the gear unit (200) and receiving rotational force controlled through the gear unit (200) to control the injection of the liquid medicine; a syringe unit (500) storing and providing the liquid medicine; a needle injection unit (600) injecting the liquid medicine by triggering the injection of the needle (650) and cannula (660) to the patient by the initial rotation of the pumping unit (300) operated by the motor unit (100); and a needle injection unit (600) coupled in a replaceable form with the syringe unit (500) and the needle injection unit (600), receiving pressure from the syringe unit (500) through the pumping unit (300) to inject the liquid medicine. A hose section (400) that transmits to a needle injection section (600); a battery section (700) that provides power and accommodates at least one pair of battery groups; A housing portion (900) comprising a fixed and detachable bottom portion (970) and a cover portion (980); wherein the pumping portion (300) comprises a first rotor portion (310) and a second rotor portion (320); a plurality of rotating pins (330) connected to the first and second rotor portions (310, 320) and partially compressing and releasing the hose portion (400) to pump the liquid medicine as the first and second rotor portions (310, 320) rotate; a bearing (340) installed between the first and second rotor portions (310, 320) and the plurality of rotating pins (330); and a rotor connecting shaft (350) that receives power from the gear portion (200) and connects the first and second rotor portions (310, 320). A fully automatic portable drug delivery pump (1000) characterized by including a protruding pin (321) that is involved in the triggering of the needle injection part (600). Claim 2 delete Claim 3 In claim 1, the needle injection unit (600) comprises: a cannula (660) for injecting the liquid medicine into the patient; a needle (650) for inserting the cannula (660) under the skin of the patient; a moving unit (630) for moving the needle (650) and the cannula (660); a connector (640) for providing the liquid medicine to the cannula (660); a linear guide (620) for positioning the moving unit (630) and guiding the direction of movement of the moving unit (630); a torsion spring (670) for providing the moving force of the moving unit (630); and a trigger pin (692) for initiating the triggering by the protruding pin (321) of the pumping unit (300). A fully automatic portable drug delivery pump (1000) characterized by including a fixing pin (695) connected to the trigger pin (692) and fixing and releasing the tension of the torsion spring (670). Claim 4 In paragraph 3, the fully automatic portable drug delivery pump (1000) further comprises: a tension spring (693) providing a restoring force to the fixing pin (695); and a spring connecting part (694) that receives a restoring force from the tension spring (693) and operates the fixing pin (695) by the restoring force. Claim 5 In paragraph 3, the moving part (630) is characterized by moving the needle (650) and the cannula (660) downward through a slide crank mechanism using the rotational force provided by the torsion spring (670) as power, and returning only the needle (650) to its original position excluding the cannula (660), in an fully automatic portable drug delivery pump (1000). Claim 6 In claim 5, the fully automatic portable drug delivery pump (1000) further comprises a cannula holder (665) for receiving the cannula (660) and a horizontal moving bar (680) located in front of the moving part (630); and, after the cannula (660) is moved downward by the triggering, the cannula holder (665) is locked and fixed between the bottom part (970) of the housing part (900) and the horizontal moving bar (680). Claim 7 In claim 1, the syringe portion (500) comprises: a syringe (510) for storing the drug liquid; a discharge port (520) for discharging the drug liquid; a sealing portion (531) for sealing so that the drug liquid does not leak; and a plunger (530) for sealing the syringe (510), which has a holder portion (532) that is a structure for holding the sealing portion (531). Fully automatic portable drug delivery pump (1000). Claim 8 In claim 7, the plunger (530) further comprises: a magnetic part (533) that provides magnetic force to the outside; an interlocking magnetic part (535) located outside the syringe (510) and interlocking magnetic part (535) with the magnetic part (533) of the plunger (530) by magnetic force; and a resistor (536) formed by electrical contact with the interlocking magnetic part (535), characterized in that it is an fully automatic portable drug delivery pump (1000). Claim 9 In claim 1, the housing part (900) further comprises an internal structural plate (960) that accommodates the motor part (100), the gear part (200), the pumping part (300), the syringe part (500), the needle injection part (600), the hose part (400) and the battery part (700); and a PCB board (800), characterized in that the fully automatic portable drug delivery pump (1000). Claim 10 In claim 9, the battery portion (700) comprises a pair of first electrodes (711) that penetrate the internal structural plate (960) and are electrically connected; and a second electrode (712) that penetrates the internal structural plate (960), is electrically insulated from the first electrodes (711), and is located between the pair of first electrodes (711), thereby forming an fully automatic portable drug delivery pump (1000). Claim 11 In claim 10, the fully automatic portable drug delivery pump (1000) further comprises, below the internal structural plate (960), a first connecting electrode (715) connecting the PCB substrate (800) and the first electrode (711), and a second connecting electrode (714) connecting the PCB substrate (800) and the second electrode (712). Claim 12 In claim 9, the fully automatic portable drug delivery pump (1000) further comprises a motor connection electrode (721) that penetrates the internal structural plate (960), is electrically connected to the motor part (100), is fixed by an insulating part (722), and is elastically connected to the PCB board (800). Claim 13 The fully automatic portable drug delivery pump (1000) is characterized in that, in the first paragraph, the first rotor part (310) and the second rotor part (320) are each coupled to interlock with each other to form the first rotor connecting part (313) and the second rotor connecting part (323), respectively, forming the rotor connecting shaft (350). Claim 14 An automatic portable drug delivery pump (1000) according to claim 1, wherein the first rotor part (310) and the second rotor part (320) include bearing cover fixing grooves (314, 324). Claim 15 In paragraph 3, the fully automatic portable drug delivery pump (1000) is characterized in that the connector (640) of the needle injection part (600) includes a barb-shaped structure. Claim 16 In claim 7, the fully automatic portable drug delivery pump (1000) is characterized in that the discharge port (520) of the syringe part (500) includes a barb-shaped structure. Claim 17 The fully automatic portable drug delivery pump (1000) according to claim 1, further comprising an O-ring portion (990) located at the portion where the bottom portion (970) and the cover portion (980) are joined and maintaining airtightness from the outside. Claim 18 A fully automatic portable drug delivery pump (1000) characterized in that, in claim 1, the hose part (400), the syringe part (500), and the needle injection part (600) are replaceable.

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