Split type medicine injection system

Abstract

The invention relates to a medicine injection device, a connecting device and a medicine injection system.The medicine injection device comprises a passive medicine storage pushing unit, a reuse control unit and a reuse control unit charging unit; the passive medicine storage pushing unit comprises a medicine storage module, a mechanical pushing module and an injection mechanism; the mechanical pushing module is connected with the medicine storage module; the injection mechanism is connected with the medicine storage module and the mechanical pushing module. The reuse control unit is detachably connected with the passive medicine storage pushing unit; the multiplexing control unit comprises a control module and a first rechargeable battery, and the first rechargeable battery is electrically connected with the control module; the multiplexing control unit charging unit is detachably connected with the multiplexing control unit, and the multiplexing control unit charging unit is used for supplying power to the multiplexing control unit.

Description

A split drug injection system Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a drug injection device. Background Art

[0002] Wearable medical devices are wearable and portable electronic medical devices that are mainly used in health monitoring, disease treatment, remote rehabilitation and other aspects.

[0003] Currently, wearable injection devices on the market suffer from common issues such as being too bulky and heavy, making them difficult to carry, being expensive, and having non-reusable electronic modules. Furthermore, they lack interactive control via a mobile handheld terminal, requiring the patient to manually apply the injection needle using an injector, resulting in a lack of intelligent control and a poor user experience.

[0004] Wearable medical devices in the future will develop towards high integration, diversified measurement, low power consumption and long battery life. Wireless transmission is the basis for wearable medical devices to collect, transmit, store and analyze physiological data. The miniaturization of wearable medical devices and the massive amount of health data put forward higher application requirements for wireless transmission technology.

[0005] Summary of the Invention

[0006] The purpose of the present application is to provide a drug injection device, which realizes the intelligence of the drug injection device and makes the electronic module of the drug injection device reusable.

[0007] To achieve the above-mentioned object, the present application provides a drug injection device, which includes: a passive drug storage and pushing unit, a multiplexing control unit, and a multiplexing control unit charging unit;

[0008] The passive drug storage pushing unit includes a drug storage module, a mechanical pushing module and an injection mechanism; the mechanical pushing module is connected to the drug storage module; the injection mechanism is connected to the drug storage module and the mechanical pushing module respectively;

[0009] The multiplexing control unit is detachably connected to the passive drug storage and pushing unit; the multiplexing control unit includes a control module and a first rechargeable battery, and the first rechargeable battery is electrically connected to the control module; the multiplexing control unit is connected to the passive drug storage and pushing unit to form a drug injection unit;

[0010] The multiplexing control unit charging unit is detachably connected to the multiplexing control unit, and the multiplexing control unit charging unit is used to supply power to the multiplexing control unit.

[0011] In one embodiment, the multiplexing control unit charging unit has one or more sets of second rechargeable batteries and one or more sets of multiplexing control unit charging ports;.

[0012] In one solution, the multiplexing control unit charging unit does not have a battery but has an external power supply interface.

[0013] In one solution, the multiplexing control unit charging unit may have both a battery and an external power supply interface.

[0014] In a specific embodiment, the multiplexing control unit in the drug injection device is connected to an external control unit. Preferably, the external control unit is connected to the multiplexing control unit wirelessly or an interface for connecting to the outside is provided on the multiplexing control unit; or the external control unit and the multiplexing control unit are integrated into an integrated structure.

[0015] In a specific embodiment, the external control unit can be connected to the reusing control unit when the reusing control unit and the passive drug storage pushing unit are connected and disconnected; and / or after the passive drug storage pushing unit initially confirms the drug capacity, when the passive drug storage pushing unit is connected to the reusing control unit again, the external control unit cannot continue to perform the control function; and / or after the reusing control unit and the external control unit are initially connected, the reusing control unit cannot be connected to the external control unit in other drug injection devices during subsequent repeated use.

[0016] The multiplexing control unit and the external control unit exchange signals wirelessly. When the multiplexing control unit detects that it is placed in the multiplexing control unit charging unit, it will turn on the charging circuit to allow the multiplexing control unit charging unit to charge it. When the multiplexing control unit detects that it is taken out of the multiplexing control unit charging unit, it will automatically detect its own power and broadcast the power information to the external control unit. When the power does not meet the activation requirements (meet the power of a complete use cycle), the external control unit cannot be wirelessly connected to the multiplexing control unit; when the power of the multiplexing control unit reaches the activation requirements, and regardless of whether the multiplexing control unit is electrically connected to the passive drug storage and propulsion unit through the interface, the external control unit can be wirelessly connected to the multiplexing control unit and enter the standby state. Its connection is uniquely identified by a key, and the multiplexing control unit can only be bound and used with a unique external control unit.

[0017] When the external control unit completes the wireless connection with the multiplexing control unit, and the multiplexing control unit detects that the passive drug storage pushing unit is electrically connected to it through the interface, it sends a connection completion signal to the external control unit; the external control unit issues a drug filling prompt message; when the drug is filled to a specified dose, the multiplexing control unit detects a drug filling completion signal and sends the drug filling completion signal to the external control unit; when the drug injection unit is applied to the specified part of the application object, the operator sends an injection needle signal to the multiplexing control unit through the external control unit, and the multiplexing control unit controls the mechanical pushing unit. The driving module works and triggers the injection mechanism to perform the injection action, and sends the injection completion signal to the external controller when the injection action is completed; the external control unit receives the injection completion signal, and the operator sends the preset drug infusion configuration to the multiplexer control unit; the multiplexer control unit is connected to the passive drug storage push unit through the electrical interface, and controls the mechanical push module in the passive drug storage push unit to apply pressure to the drug storage module according to the preset drug infusion configuration, so that the drug enters the injection mechanism from the drug storage module under the pressure, and is injected into the body of the applied object through the injection mechanism to complete the infusion action.

[0018] After the reuse control unit is electrically connected to the drug storage module and completes the drug filling (initial confirmation of drug capacity), once the reuse control unit detects that its electrical connection is disconnected, a corresponding vibration and sound alarm will be generated, and the alarm information will be sent to the external controller; and the drug storage module after this filling (initial confirmation of drug capacity) cannot be reconnected to the reuse control unit to prevent the drug storage module from being reused. During normal use of the drug injection unit, when the reuse control unit detects that its operating software or the electrical signal fed back by the drug storage module is abnormal (pipeline blockage, drive wire breakage, drug storage device drug exhaustion, reuse control unit power exhaustion, infusion abnormality, etc.), a corresponding vibration and sound alarm will be generated, and the alarm information will be sent to the external controller. The operating status information, detection data, alarm information, etc. of the drug injection unit will be transmitted wirelessly to the external control unit, and uploaded to the data storage server if there is a network.

[0019] When a deactivation command is sent through the external control unit to stop the drug injection unit, its wireless connection will be disconnected and will not be reconnected before a new usage cycle begins; the reuse control module and the drug storage module are disassembled, and the reuse control module is placed in the reuse control unit charging unit for charging; when the power of the reuse control unit meets the activation requirements, it can be taken out from the reuse control unit charging unit and wirelessly connected to the external control unit, and combined with the new drug storage module to start a new drug infusion usage cycle; since this reuse control unit is bound to the external controller when it is used for the first time, no key authentication is required when it is used again, and it cannot be wirelessly connected to other external controllers.

[0020] Preferably, the passive drug storage and pushing unit also includes a first shell; the first shell includes a first box body, a first cover body, and a reuse control unit accommodating area and a passive drug storage and pushing unit accommodating area composed of the first box body and the first cover body; the first cover body is buckled on the top of the first box body and is welded by laser.

[0021] Further preferably, the first box body has a reuse control unit fixing part and a connecting male or female socket; the reuse control unit fixing part is arranged in the reuse control unit accommodating area; the connecting male or female socket is injection molded with the first box body of the reuse unit accommodating area; the connecting male socket has a sealing and waterproof rubber ring.

[0022] More preferably, the mechanical pushing module includes a pushing member and a push plug; the push plug extends into the drug storage module; the pushing member is connected to the push plug and is electrically connected to the control module.

[0023] Preferably, the pushing member includes a connecting bracket, a plug pushing shaft, a driving wire, a ratchet and a rocker arm;

[0024] The connecting bracket is electrically connected to the control module; one end of the push plug shaft is connected to the push plug, and the other end is connected to the connecting bracket; the ratchet is passed through the push plug shaft; the drive wire is connected to the connecting bracket; and the rocker arm is connected to the connecting bracket.

[0025] Further preferably, the rocker arm has a vertical connecting portion and a paddle; the vertical connecting portion is connected to the connecting bracket; the paddle is integrally connected to the vertical connecting portion and extends toward the ratchet.

[0026] Further preferably, the pushing member further has an injection mechanism trigger module; the injection mechanism trigger module is connected to the ratchet.

[0027] More preferably, the injection mechanism comprises a drug catheter, an injection needle module and a drug injection needle;

[0028] One end of the drug conduit is connected to the drug storage module, and the other end passes through the injection needle module and is connected to the drug injection needle; the injection needle module is connected to the injection mechanism trigger module.

[0029] Preferably, the reuse control unit further includes a second housing; the second housing includes a second box body, a second cover, and a receiving area formed by the second box body and the second cover; the second cover and the second box body are laser welded; the second box body has a female or male connector injection-molded with the second box body; the receiving area is used to accommodate the first rechargeable battery and the control module. The male connector has a sealing and waterproof rubber ring.

[0030] Preferably, the multiplexing control unit further includes an alarm module; the alarm module is electrically connected to the control module.

[0031] The drug injection device provided in the embodiment of the present application utilizes a detachable connection between the reuse control unit and the passive drug storage and push unit, allowing the electronic and mechanical parts of the drug injection device to be separated and plugged and unplugged, thereby making the electronic part reusable, reducing environmental pollution and costs. The provision of an external control unit makes the drug injection device intelligent, eliminating the need for manual injection, greatly improving the user experience. Furthermore, the reuse control unit charging unit has two reuse control unit charging ports, which can charge two reuse control units simultaneously. The reuse control unit charging unit itself also has a second rechargeable battery, i.e., a power storage function, eliminating the need to connect a charging cable during use.

[0032] In another embodiment, the passive drug storage pushing unit includes a base plate, a driving device and a needle-assisting device, the base plate is used to fix the driving device and the needle-assisting device, the driving device includes a driving module, a pushing mechanism, a rotating wheel, a first threaded rod, a second threaded rod and a pushing module; the driving module is used to drive the pushing mechanism to rotate along the first direction and the second direction; the pushing mechanism is provided with a thread, and the rotating wheel is driven to rotate by the pushing module to realize rotation in the first direction; the first threaded rod can rotate synchronously with the rotating wheel and / or be axially displaced relative to the rotating wheel, and is screwed to the thread of the pushing module and to the thread of the second threaded rod; the second threaded rod is fixed to the push plug, and the pushing module includes a push plug and a liquid storage tank; the liquid storage tank is fixed on the base plate for storing liquid.

[0033] In a specific embodiment, the driving working process of the passive drug storage pushing unit includes: when the pushing mechanism rotates along a first direction, the pushing mechanism drives the wheel to rotate synchronously in the first direction, the first threaded rod rotates synchronously with the wheel and rotates relative to the second threaded rod, at this time the second threaded rod produces an axial displacement relative to the first threaded rod, pushing the plunger to move, and then when the pushing mechanism rotates in a second direction, the wheel does not rotate, the first threaded rod does not rotate, the first threaded rod produces an axial displacement relative to the pushing mechanism, driving the second screw rod to displace synchronously, pushing the plunger to move: wherein, the first direction is clockwise or counterclockwise, and the second direction is opposite to the first direction.

[0034] In a specific embodiment, the pushing mechanism includes a swing arm, a pushing module, and a stop module, wherein the pushing module is connected to the swing arm, the pushing module drives the swing arm to rotate in the first direction and the second direction, the pushing module pushes the rotating wheel to rotate in the same direction along the first direction, and the stop module acts on the rotating wheel to control the unidirectional rotation of the rotating wheel. Preferably, the rotating wheel is a ratchet.

[0035] In a specific embodiment, the first threaded rod is an external screw tube, which is arranged in the rotating wheel and can rotate synchronously with the rotating wheel and / or move axially relative to the rotating wheel. The outer wall of the first threaded rod is provided with a thread, which is screwed to the screw hole of the swing arm. The inner wall of the first threaded rod is provided with an internal thread, which is screwed to the second threaded rod. Preferably, one end of the push plug is provided with an external screw, which is screwed to the inner wall of the first threaded rod; the liquid storage tank is sleeved on the outside of the push plug to limit the rotation of the push plug.

[0036] In a specific embodiment, the first threaded rod includes an outer screw tube, an inner screw tube, a second force storage module, a limiting plate and a telescopic sleeve; the inner screw tube has a thread on the inner wall and can be connected to the outer screw tube, and one end of the inner screw tube is passed through the second force storage module, and the outer wall of the inner screw tube is provided with a sliding groove, which is slid onto the telescopic sleeve through the sliding groove, and the top end of the inner wall of the outer screw tube is provided with a torsion spring limiting area; the second force storage module is arranged in the torsion spring limiting area of ​​the outer screw tube; the limiting plate is connected to the second force storage module, the limiting plate is fixed on the top surface of the outer screw tube, and is clamped in the limiting groove on the top surface of the swing arm, the second force storage module is limited to the telescopic sleeve of the outer screw tube by the limiting plate, and one end is arranged in the outer screw tube for guiding the axial displacement of the inner screw tube; the outside of the outer screw tube is provided with a thread that is screwed with the thread of the pushing module.

[0037] In a specific embodiment, the needle-assisting device includes a track pressure plate, a soft needle slider, a hard needle slider, two connecting rods, a first force storage module, a limiter and a trigger rod; the track pressure plate is fixed on the base plate; the soft needle slider is used to fix the soft needle and is arranged on the track of the track pressure plate; the hard needle slider is arranged on the track of the track pressure plate and above the soft needle slider, and is used to fix the hard needle, and the hard needle is connected to the liquid storage tank; the two connecting rods include a first connecting rod and a second connecting rod, the first connecting rod is connected to the hard needle slider, and the second connecting rod is connected to the first force storage module through a pin shaft, and is used to drive the two connecting rods to rotate when the first force storage module releases elastic potential energy; the limiter is fixed on the base plate, and is used to limit the movement of the first force storage module, the hard needle slider or the two connecting rods, thereby keeping the first force storage module in a compressed state; the trigger rod is constrained on the base plate, one end of the trigger rod is limited by the limiting surface of the rotating wheel, and the other end of the trigger rod limits the limiter.

[0038] In a specific embodiment, the drug discharging process of the passive drug storage pushing unit includes: wheel drive: the driving module is working, the wheel is a ratchet, which drives the swing arm to rotate in the first direction, and drives the ratchet, outer screw and limit plate to rotate in the first direction through the pushing module. At this time, the limit plate slides out of the limit groove, and the second storage module releases and clamps the inner screw. The inner screw rotates in the first direction. Due to the rotation limit of the push plug, the inner screw is rotated out, thereby driving the push plug axial displacement to squeeze out the liquid in the liquid storage tank; retreat drive: the driving module is working, driving the swing arm to rotate in the second direction, and the retreat stop module presses against the ratchet tooth surface to prevent rotation. Due to the axial limit of the swing arm and the ratchet, the outer screw is rotated out, driving the torsion spring, inner screw, inner screw and push plug axial displacement to squeeze out the liquid in the liquid storage tank.

[0039] In a specific embodiment, the driving device also includes a first step detection module, including a drug quantity detection piece and a first external brush, one end of the drug quantity detection piece is fixed to the bottom of the rotor and connected to the first external brush, and the other end is arranged on the inner wall of the outer coil; during the drug filling process of the liquid storage tank, when the liquid in the liquid storage tank increases, the plunger drives the inner coil to move axially toward the outer coil, and when the liquid increases to a preset volume, the drug quantity detection piece contacts the inner coil, the circuit is turned on, and the system determines that the second storage module can be triggered to clamp the inner coil; during the drug discharging process, when the liquid in the liquid storage tank is lower than the preset volume, the drug quantity detection piece is separated from the contact with the inner coil, and the circuit is disconnected at this time.

[0040] In a specific embodiment, the first step detection module also includes a detection resistor and a detection brush; the detection resistor is fixed at the bottom of the rotating wheel and electrically connected to the first external brush, and the detection brush is arranged at the bottom of the external coil; when the rotating wheel rotates and the external coil is stepped, the detection brush and the detection resistor form a loop and are connected to the first external brush, so that the resistance value will change each time the rotating wheel rotates and the external coil is stepped, thereby detecting the amount of each movement.

[0041] In a specific embodiment, the driving device also includes a second step detection module, including a second external brush and a rotation detection piece. The rotation detection piece is provided with a plurality of notches, fixed at the bottom of the rotating wheel, and connected to the second external brush. When the rotation detection piece rotates to the notch, the circuit is disconnected. When it rotates to a non-notch, it is connected to the second external brush, thereby realizing rotation detection.

[0042] In a specific embodiment, the passive drug storage pushing unit needle-assisting process includes: in the initial state, the limiting surface of the rotating wheel limits the trigger rod, the trigger rod lifts the limiting part, and the limiting part limits the movement of the hard needle slider or the second connecting rod, so that the first force storage module remains in a compressed state; when the rotating wheel rotates, the trigger rod passes over the limiting surface of the rotating wheel and rotates, the limiting part falls, and the hard needle slider or the second connecting rod is disengaged from the limit of the limiting part. At this time, the first force storage module is released, driving the second connecting rod and the first connecting rod to rotate, thereby driving the hard needle slider and the soft needle slider to move downward along the track of the track pressure plate, thereby completing the needle-assisting process. After that, the soft needle slider is limited to the bottom of the track pressure plate, and the hard needle slider is reset.

[0043] In a specific embodiment, the needle-assisting device includes a push rod, the limiting member is a limiting plate, and the second connecting rod is provided with a slot adapted to the limiting plate; in an initial state, the limiting plate is lifted up by the push rod, thereby engaging with the slot of the second connecting rod, thereby suppressing the first force storage module by limiting the position of the second connecting rod;

[0044] When the trigger rod passes over the limiting surface of the rotating wheel, it drives the top rod to rotate. At this time, the limiting piece falls and disengages from the second connecting rod. As a result, the first power storage module is released from the limit and drives the second connecting rod and the first connecting rod to rotate.

[0045] In a specific embodiment, the needle-assisting device includes a push rod, and the limiting component is a first limiting rod. One end of the first limiting rod is fixed to the base plate by a pin. In the initial state, the other end of the first limiting rod is lifted by the push rod, thereby resisting the hard needle slider, thereby achieving the suppression of the first force storage module by limiting the hard needle slider; when the push rod passes over the limiting surface of the rotating wheel and rotates, the first limiting rod rotates at this time, and the hard needle slider is disengaged from the limit of the first limiting rod, thereby the first force storage module is disengaged from the limit and released, driving the second connecting rod and the first connecting rod to rotate.

[0046] In a specific embodiment, the needle-assisting device includes a push rod, and the limiting component includes a second limiting rod and a limiting pressure plate. One end of the second limiting rod is fixed to the base plate by a pin shaft, and one end of the limiting pressure plate is fixed to the track pressure plate and is provided with a limiting groove; in the initial state, the other end of the second limiting rod is lifted by the push rod, thereby being against the limiting pressure plate. At this time, the limiting groove limits the hard needle slider, thereby achieving the suppression of the first force storage module by limiting the hard needle slider; when the trigger rod passes the limiting surface of the rotating wheel, driving the push rod to rotate, at this time the second limiting rod rotates, and the limiting pressure plate is disengaged from the contact with the hard needle slider, thereby the first force storage module is disengaged from the limit and released, driving the second connecting rod and the first connecting rod to rotate.

[0047] The present application also relates to a connecting device, wherein the connecting device includes a male socket and a female socket, the male socket includes a bracket, a flexible cable, and a sealing sleeve, wherein pins are provided at both ends of the flexible cable, one end of the flexible cable is wrapped around the bracket, and the sealing sleeve is provided on the bracket and the flexible cable and can be connected to the female socket to achieve waterproof sealing.

[0048] In a specific embodiment, the female socket includes a flexible cable and a physical interface. Pins are provided at both ends of the flexible cable, and one end of the pin is electrically connected to the physical interface pin.

[0049] The present application also relates to a drug injection system, which includes the drug injection device of the present application and the connecting device of the present application.

[0050] In a specific embodiment, the male socket can be connected to or integrated with the passive drug storage and pushing unit, and the female socket can be connected to or integrated with the reuse control unit to achieve physical and electrical connection between the passive drug storage and pushing unit and the reuse control unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] FIG1 is a top view of a drug injection device provided in an embodiment of the present application;

[0052] FIG2 is a structural diagram of a control module provided in an embodiment of the present application;

[0053] FIG3 is a structural diagram of a first rechargeable battery provided in an embodiment of the present application;

[0054] FIG4 is a structural diagram of a second housing provided in an embodiment of the present application;

[0055] FIG5 is a structural diagram of an alarm module provided in an embodiment of the present application;

[0056] FIG6 is one of the partial structural diagrams of the passive drug storage and propulsion unit provided in an embodiment of the present application;

[0057] FIG7 is a schematic diagram showing the connection relationship between the passive drug storage and pushing unit and the multiplexing control unit provided in an embodiment of the present application;

[0058] FIG8 is a second partial structural diagram of the passive drug storage and propulsion unit provided in an embodiment of the present application;

[0059] FIG9 is a top view of the first housing provided in an embodiment of the present application;

[0060] FIG10 is a front view of the first housing provided in an embodiment of the present application;

[0061] FIG11 is a top view of the first box body in the open state provided by an embodiment of the present application;

[0062] FIG12 is a second top view of the first box body in the open state provided in an embodiment of the present application;

[0063] FIG13 is a front view of a drug injection device provided in an embodiment of the present application;

[0064] FIG14 is a structural diagram of a charging unit of a multiplexing control unit provided in an embodiment of the present application.

[0065] FIG15 is a structural diagram of the male socket in the connection device provided in an embodiment of the present application

[0066] FIG16 is a structural diagram of the female socket in the connection device provided in an embodiment of the present application

[0067] FIG17 is a schematic structural diagram of a passive drug storage and propulsion unit provided in an embodiment of the present application;

[0068] FIG18 is a schematic structural diagram of a driving device provided in an embodiment of the present application;

[0069] FIG19 is an exploded schematic diagram of a driving device provided in an embodiment of the present application;

[0070] FIG20 is a schematic diagram of the arrangement of the pushing module and the anti-retraction module provided in an embodiment of the present application;

[0071] FIG21 is a schematic diagram of a first step detection module provided in an embodiment of the present application;

[0072] FIG22 is a schematic diagram of a second step detection module provided in an embodiment of the present application;

[0073] FIG23 is a schematic diagram of a horizontally placed auxiliary needle structure provided in an embodiment of the present application;

[0074] FIG24 is a schematic diagram of the initial state of the limiting piece provided in an embodiment of the present application;

[0075] FIG25 is a schematic diagram of the auxiliary needle state with the limiting piece provided in an embodiment of the present application;

[0076] FIG26 is a schematic diagram of a vertically arranged auxiliary needle structure according to an embodiment of the present application;

[0077] FIG27 is a schematic diagram of the initial state of the limiting lever provided in an embodiment of the present application;

[0078] Figure 28 is a schematic diagram of the initial state of a limiting rod and a limiting pressure plate provided in an embodiment of the present application.

[0079] FIG29 is a schematic diagram of the initial state of a limit member and a trigger rod provided in an embodiment of the present application. DETAILED DESCRIPTION

[0080] The technical solution of the present application is further described in detail below through the accompanying drawings and examples.

[0081] The present application provides a drug injection device, the bottom of which is bonded to the surface of the object to be injected (the user's skin) through non-woven fabric, thereby realizing intelligent injection of drugs.

[0082] Figure 1 is a top view of the drug injection device provided in an embodiment of the present application. As shown in Figure 1, a drug injection device provided in an embodiment of the present application specifically includes: an external control unit (not shown in the figure), a multiplexing control unit 1, a passive drug storage and pushing unit 2 and a multiplexing control unit charging unit 3.

[0083] Among them, the external control unit is the master control module of the drug injection device, which can specifically be an application (Application, APP) installed on the mobile terminal, which facilitates user control, realizes the intelligence of the drug injection device, and improves user experience.

[0084] The reuse control unit 1 is the driving mechanism of the drug injection device and also its electronic part. It is detachably connected to the passive drug storage push unit 2, which can be recycled and reduces the cost of the drug injection device. As shown in Figures 2 and 3, the reuse control unit 1 can specifically include a control module 10 and a first rechargeable battery 11. The control module 10 can receive Bluetooth signals sent by an external control unit, and then parse the Bluetooth signals to generate electrical signals that can be recognized by the passive drug storage push unit 2. The Bluetooth signal can specifically include the injection volume and injection time. The first rechargeable battery 11 is electrically connected to the control module 10 and mainly provides the control module 10 with the electrical energy required for operation.

[0085] As shown in FIG4 , to reduce the size of the drug injection device and facilitate installation, the reusable control unit further includes a second housing 12 . The second housing 12 can be shaped as a cuboid or a cube. The second housing 12 includes a second box body 121 , a second cover 122 , and a receiving area 123 .

[0086] The second housing 121 has a connection port 1211 and a female connector 1212 on one side thereof. The female connector 1212 is located inside the connection port 1211 and is injection molded with the second housing 121 to improve waterproofness. The female connector 1212 is electrically connected to the first rechargeable battery 11.

[0087] The accommodating area 123 is a space enclosed by the second box body 121 and the second cover body 122 , and is used to accommodate the first rechargeable battery 11 and the control module 10 .

[0088] The second cover 122 and the second box body 121 are welded by laser, which protects and seals the control module 10 and the first rechargeable battery 11 , and also improves the sealing and waterproof properties of the reuse control unit 1 .

[0089] In a preferred embodiment, the multiplexing control unit 1 further includes an alarm module 13, as shown in FIG5 . The alarm module 13 is housed within the second housing 121 and is electrically connected to the control module 10. When the control module 10 detects that the charge level of the first rechargeable battery 11 is below a preset charge threshold, an alarm signal is generated and sent to the alarm module 13, prompting the user to replace or recharge the first rechargeable battery 11. The alarm module 13 can be implemented in various ways, including, but not limited to, ceramic sounding discs and micro-vibration motors.

[0090] The passive drug storage pushing unit 2 is an execution module of the drug injection device and is also a disposable module of the drug injection device. As shown in Figures 6 and 8, the passive drug storage pushing unit 2 can specifically include a drug storage module 21, a mechanical pushing module 22 and an injection mechanism 23.

[0091] The drug storage module 21 is a container for medication. In this example, the drug storage module 21 is ellipsoidal in shape, with an arc-shaped protrusion at the bottom (not shown). A drug delivery conduit 211 and a drug injection conduit 212 are located at the top of the drug storage module 21. The drug delivery conduit 211 is positioned on one side of the top of the drug storage module 21, while the drug injection conduit 212 is positioned opposite the drug delivery conduit 211. In a preferred embodiment, to ensure complete delivery of medication without residual drug, a mechanical push module limiter 213 is also provided at the top of the drug storage module 21.

[0092] In this example, the mechanical push module 22 specifically includes a push member 221 and a push plug 222. The outer diameter of the push plug 222 matches the inner diameter of the drug storage module 21. The push plug 222 extends into the drug storage module 21 and is restrained during forward movement by the mechanical push module's retaining structure 213. A circular arc-shaped protrusion at the bottom of the drug storage module 21 prevents axial slippage, improving injection accuracy. The push member 221 is connected to the push plug 222, providing the driving force for the push plug 222 to move, causing it to squeeze the drug within the drug storage module 21, thereby entering the drug delivery conduit 211.

[0093] In a specific example, as shown in FIG. 7 , the pushing member 221 may include a connecting bracket 2211 , a plug-pushing shaft 2212 , a driving wire 2213 , a ratchet 2214 and a rocker arm 2215 .

[0094] The connecting bracket 2211 is a supporting structure for the pusher 221 and is also a structure electrically connected to the reuse control unit 1. One end of the pusher shaft 2212 is connected to the pusher 222, and the other end is connected to the connecting bracket 2211. The ratchet 2214 is passed through the pusher shaft 2212. The drive wire 2213 is arranged below the drug storage module 21 and is connected to the connecting bracket 2211. The ratchet 2214 has a boss 22140 and a notch 22141, and the notch 22141 is located opposite the boss 22140. The rocker arm 2215 has a vertical connecting portion and a paddle 22151. The vertical connecting portion is connected to the connecting bracket 2211. The paddle 22151 is integrally connected to the vertical connecting portion and extends toward the ratchet 2214.

[0095] The pusher 221 can be specifically connected to the wire 200 via the connecting bracket 2211, and the wire 200 is further connected to the connecting female socket 1212, thereby achieving electrical connection with the control module 10. When the multiplexing control unit 1 sends an electrical signal, the driving wire 2213 is energized through the wire 200 and the connecting female socket 1212. The driving wire 2213 contracts due to heat and reciprocates, driving the rocker 2215 to reciprocate, thereby causing the paddle 22151 to rotate the ratchet 2214, pushing the plunger shaft 2212 forward, and further pushing the plunger 222 to generate a squeezing force on the drug.

[0096] In a preferred example, the pusher 221 further includes an injection mechanism trigger module 2216 . The injection mechanism trigger module 2216 is connected to the ratchet 2214 .

[0097] In this example, the injection mechanism trigger module 2216 may specifically include a latch 22161 and a latch spring 22162, wherein the latch spring 22162 is sleeved on the outside of the latch 22161. One end of the latch 22161 abuts against the boss 22140 of the ratchet 2214, and the other end is connected to the injection mechanism 23.

[0098] The injection mechanism 23 is connected to the drug storage module 21 and the mechanical pushing module 22 respectively. In this example, the injection mechanism 23 includes an injection needle module 231, a drug conduit 232 and a drug injection needle 233.

[0099] The injection needle module 231 specifically includes a needle holder 2311 and a needle push spring 2312. The needle push spring 2312 is inserted into the needle holder 2311. The medication injection needle 233 is connected to the needle holder 2311. One end of the medication conduit 232 extends into the medication delivery conduit 211, and the other end passes through the needle push spring 2312 and connects to the medication injection needle 233. Before injection, the needle holder 2311 is connected to the injection mechanism trigger module 2216, and the latch 22161 abuts against the boss 22140, securing the needle holder 2311 in the charged position, thereby placing the needle push spring 2312 in the charged state. When the ratchet 2214 rotates, the notch 22141 of the ratchet 2214 contacts the latch 22161, and the latch 22161 moves toward the ratchet 2214. The latch spring 22162 is released and moves away from the needle holder 2311, causing the needle holder 2311 to move forward and the needle pushing spring 2321 to be released, instantly completing the needle pushing action.

[0100] In a preferred embodiment, as shown in FIG9 , the passive drug storage and propulsion unit 2 further includes a first housing 24. As shown in FIG10 and FIG11 , the first housing 24 includes a first cover 240, a first box body 241, and a multiplex control unit housing area 242 and a passive drug storage and propulsion unit housing area 243 formed by the first box body 241 and the first cover 240. The first box body 241 includes a multiplex control unit fixing member 2411 and a connector 2412. The multiplex control unit fixing member 2411 is disposed within the multiplex control unit housing area 242. The connector 2412 is disposed on a side surface of the second box body 241 within the multiplex control unit housing area 242 and includes a connector waterproof rubber ring 24121. As shown in FIG12 , the connector 2412 is electrically connected to the wire 200. The first cover 240 snaps onto the top of the first box body 241 and is sealed using laser welding, ensuring that the passive drug storage and propulsion unit 2 is highly waterproof.

[0101] As shown in Figure 13, the male connector 2412 is connected by plugging into the female connector 1212 through the connection port 1211, so that the reuse control unit 1 and the passive drug storage push unit 2 can be plugged and unplugged. Due to the setting of the waterproof rubber ring 24121 of the male connector, the connection between the male connector 2412 and the female connector 1212 is waterproof, thereby making the entire drug injection device have good waterproof properties.

[0102] As shown in Figure 14, the multiplexing control unit charging unit 3 has a second rechargeable battery (not shown) and two sets of multiplexing control unit charging ports 31. The provision of the second rechargeable battery enables the multiplexing control unit charging unit itself to have a power storage function. The multiplexing control unit charging unit 3 is provided outside the first shell 24 and the second shell 12, and is detachably connected to the multiplexing control unit 1 for charging the multiplexing control unit 1. The two sets of multiplexing control unit charging ports 31 enable the multiplexing control unit charging unit 3 to charge two multiplexing control units 1 at the same time.

[0103] The above describes the components of the drug injection device and the connection relationship between the various components. The following describes the working principle of the drug injection device.

[0104] The male connector 2412 is inserted into the female connector 1212 through the connection port 1211 to electrically connect the multiplexing control unit 1 and the passive drug storage and pushing unit 2; the bottom of the drug injection device is attached to the surface of the object to be injected through non-woven fabric or the like.

[0105] When the control module 10 detects that the mechanical pushing module 22 is connected to it, it sends a connection signal to the external control unit; the external control unit sends a drug filling prompt signal;

[0106] When the medicine is filled to a specified dose, the control module 10 receives a medicine filling completion signal and sends the medicine filling completion signal to the external control unit;

[0107] When the drug injection device is attached to the object, the external control unit sends an injection signal to the control module 10, which in turn controls the mechanical push module 22 to trigger the injection mechanism 23 to perform the injection operation. Specifically, the control module 10 controls the first rechargeable battery 11 to energize the drive wire 2213 via the female connector 1212 and the male connector 2412. The drive wire 2213 contracts due to heat, causing it to reciprocate, driving the rocker 2215 to reciprocate. This causes the paddle 22151 to rotate the ratchet 2214, pushing the plunger shaft 2212 forward, which in turn pushes the plunger 222 to exert a squeezing force on the drug.

[0108] Afterwards, the control module 10 feeds back the injection information to the external control unit. The external control unit receives the injection completion confirmation signal and generates a drug injection signal, which it sends to the control module 10. The control module 10 controls the mechanical push module 22 to apply pressure to the drug storage module 21, causing the drug to enter the injection mechanism 23 under pressure from the drug storage module 21, completing the injection. Specifically, when the ratchet 2214 rotates, the notch 22141 of the ratchet 2214 contacts the latch 22161, causing the latch 22161 to move toward the ratchet 2214. This releases the latch spring 22162, moving it away from the needle holder 2311, causing the needle holder 2311 to move forward. This releases the needle push spring 2321, instantly completing the needle push.

[0109] Figure 15 is the male socket of the connecting device, in which the bracket 41 is fixedly connected to the flexible cable 43, a sealing rubber ring 421 is provided on the fixing sleeve 42, and a groove is provided on the fixing sleeve 42 for setting a clamp 44 to facilitate a close connection with the passive drug storage push unit. The clamp 44 can also be discarded and glue filling, interference fit and other connection methods can be used to achieve connection with the passive drug storage push unit.

[0110] Figure 16 is a female socket of the connecting device, in which the plug 52 and the flexible cable 51 are connected by a PIN pin. The plug 52 is provided with a card slot for setting a clamp 53 to facilitate a tight connection with the reuse control unit. The clamp can also be discarded and glue filling, interference fit and other connection methods can be used to achieve connection with the reuse control unit.

[0111] Figure 17 is a schematic diagram of the structure of a passive drug storage push unit provided in an embodiment of the present application. As shown in Figure 1, the passive drug storage push unit includes a base plate 10', a drive device 20', and a needle-assisting device 30'. Each component of the system is described below. The base plate 10' is used to secure the drive device 20' and the needle-assisting device 30'.

[0112] The driving device 20', as shown in Figures 18 and 19, specifically includes a swing arm 201', a driving module 202', a pushing module 203', a ratchet 204', a backstop module 205', an outer spiral tube 206', an inner spiral tube 210' and a propulsion module (a push plug 211', a liquid storage tank 212'). The following is a detailed introduction to the structure of each part of the driving device 20'.

[0113] The swing arm 201' is used to receive external driving force to generate rotation, thereby driving the pushing module 203'. The swing arm 201' can be a plate-like structure with a screw hole in the middle. In this embodiment, the swing arm 201' is fixed on the base plate 10', and the base plate 10' is provided with corresponding limiting columns to limit the axial position of the swing arm 201'.

[0114] The driving module 202' is used to generate an external driving force to drive the swing arm to rotate. Specifically, it can be connected to the swing arm 201'. The driving module includes but is not limited to two driving wires, which are respectively connected to the two ends of the swing arm 201'. In a specific example, the driving wire here can be a metal wire, and the property of the wire is that it shrinks after being heated to generate a driving force. When the driving wire is energized, it drives the swing arm 201' to rotate. Specifically, when the driving device 20' is working, the two driving wires are alternately energized, and the wires change from a relaxed state to a contracted state to generate a driving force, which drives the swing arm 201' to rotate. Optionally, the driving device 20' also includes a swing arm limiting surface, which is fixed on the base plate 10'. When the swing arm 201' rotates to the swing arm limiting surface, the driving wire 202' stops being energized.

[0115] The two push modules 203' are used to drive the ratchet 204' to rotate. As shown in Figure 20, the push modules 203' can be two push plates, one located at each end of the swing arm 201'. Rotation of the swing arm 201' drives the push modules 203'. The two push modules 203' are staggered so that at each driving stage, there is always one push module 203' located at the root of the ratchet 204' teeth, driving the ratchet 204' to rotate.

[0116] The ratchet 204' is driven to rotate by the pushing module 203'. Specifically, a plurality of teeth are provided on the upper part of the outer wall of the ratchet 204'. The pushing module 203' drives the ratchet 204' to rotate through the teeth of the ratchet 204', and the bottom plate axially limits the ratchet 204'. There are many ways of axial limitation, including but not limited to setting a rotating part at the bottom 204' of the ratchet, and realizing axial limitation of the ratchet 204' by axially limiting the rotating part through the bottom plate; further, a limiting surface 2041' is also provided on the outer wall of the ratchet 204', and the needle-assisting device 30' is triggered by the limiting surface. Optionally, in order to ensure the stability of the ratchet 204' during the rotation process, the driving device 20' also includes two fixed plates and fixed columns for limiting the ratchet 204'. The two fixed plates are respectively arranged on both sides of the ratchet 204', and the fixed column is fixed between the two fixed plates, thereby fixing the ratchet 204' between the fixed column and the two fixed plates, thereby realizing radial limitation of the ratchet 204'.

[0117] The backstop module 205' is fixed to the base plate 10' and connected to the ratchet 204'. Its function is to control the one-way rotation of the ratchet 204'. As shown in Figure 20, the backstop module 205' can be specifically two stoppers, arranged in an interlaced manner. Such that one backstop module 205' is always located at the root of the ratchet 204' teeth, restricting the ratchet 204' from one-way rotation. Alternatively, the backstop module 205' can also use a one-way bearing to achieve its function.

[0118] The outer screw tube 206' is arranged inside the ratchet 204', and can be specifically cooperated with the slide groove and the key, thereby, the outer screw tube 206' can rotate synchronously with the ratchet 204' or axially displace relative to the ratchet; the outer wall of the outer screw tube 206' is provided with a thread, which is screwed into the screw hole of the swing arm 201', thereby realizing the relative movement of the outer screw tube 206' and the swing arm 201', that is, the outer screw tube 206' can realize axial displacement.

[0119] The inner spiral tube 210' has an internal thread inside, and one end is set in the outer spiral tube. Specifically, the rotation limit can be completed by a slot. When the user injects the medicine into the inner tube to the full amount, the inner spiral tube 210' moves toward the direction close to the outer spiral tube 206' and reaches the axial limit surface at the end, thereby forming an actual fixed connection. After starting work, the inner spiral tube 210' is driven to rotate and move together with the rotation and axial displacement of the outer spiral tube 206'.

[0120] Push plug 211' is disposed within liquid storage tank 212' and is used to pressurize the liquid within liquid storage tank 212'. An internal screw 2111' is provided at one end. Internal screw 2111' is threadedly engaged with the inner wall of internal coil 210'. Thus, the internal screw can be unscrewed within internal coil 210', driving axial displacement of push plug 211'. Preferably, a rubber sealing ring is provided at the front of push plug 211' to seal the liquid within liquid storage tank 212'.

[0121] The liquid storage tank 212' is fixed to the base plate 10' and is used to store liquid. It is sleeved on the outside of the plunger 211', and the plunger 211' is rotationally limited. The plunger 211' can be axially displaced within the liquid storage tank 212' to achieve liquid injection and withdrawal. It should be noted that those skilled in the art can select the liquid stored in the liquid storage tank 212' as needed. Liquids include, but are not limited to, insulin, glucagon, antibiotics, nutrient solutions, analgesics, morphine, anticoagulants, gene therapy drugs, cardiovascular drugs, or chemotherapy drugs.

[0122] Based on the understanding of the structure of the driving device 20 ′ provided in this embodiment, the working process and principle thereof will be introduced below with reference to FIG. 17 to FIG. 20 .

[0123] The medicine discharging process of the passive medicine storage pushing unit provided in this embodiment includes ratchet drive and retraction drive.

[0124] Ratchet drive: Drive module 202' operates, driving swing arm 201' to rotate in a first direction. This, in turn, drives ratchet 204' and outer solenoid 206' in the first direction through push module 203'. At this point, outer solenoid 206' and inner solenoid 210' are considered fixedly connected, and inner solenoid 210' also rotates in the first direction. Because plunger 211' is located within liquid reservoir 212' and cannot rotate, the rotational motion of inner solenoid 210' is converted into linear stepping motion of plunger 211'. The inner screw 2111' rotates out, driving axial displacement of plunger 211' away from outer solenoid 206' and expelling liquid from liquid reservoir 212'. At this point, the stop module 205' passes over ratchet 204', unrestricting its rotation.

[0125] During the retraction drive, the drive module 202' operates, driving the swing arm 201' to rotate in the second direction. Since the retraction stop module 205' abuts the teeth of the ratchet 204' to prevent it from following the rotation, the swing arm 201' rotates relative to the outer screw 206'. Due to the axial limitation of the swing arm 201' and the ratchet 204', the outer screw 206' is unscrewed, driving the inner screw 210', the inner screw 2111', and the plunger 211' to axially displace, forcing the liquid in the liquid storage tank 212'. At this time, the push module 203' slides off the surface of the ratchet 204'. It can be understood that this retraction process also drives drug infusion, eliminating idle travel and minimizing structural energy consumption.

[0126] The first direction is opposite to the second direction. The first direction can be clockwise or counterclockwise, and those skilled in the art can set it as needed.

[0127] It should be noted that during the driving wheel driving and retraction driving processes, the driving wheel 205 ′ does not make axial movement, thereby avoiding radial runout of the ratchet. Furthermore, the reduction in moving parts makes the structural stability more reliable and the structural accuracy higher.

[0128] In some preferred embodiments, the drive device further includes a second force storage module 207', a limiting plate 208', and a telescopic sleeve 209'. Specifically, a torsion spring limiting area is provided at the top of the inner wall of the outer coil 206' for accommodating the second force storage module 207'. The second force storage module 207' is disposed within the torsion spring limiting area of ​​the outer coil 206', with one end fixed therein. The limiting piece 208' is connected to the second force storage module 207' and is used to limit the second force storage module 207'. Specifically, the limiting piece 208' is fixed on the top surface of the outer screw tube 206' and is clamped in the limiting groove on the top surface of the swing arm 201'. The second force storage module 207' is limited to the torsion spring limiting area of ​​the outer screw tube 206' by the limiting piece 208'. It should be understood that when the outer screw tube 206' rotates, it will drive the limiting piece 208' to rotate. When it rotates to a certain angle, the limiting piece 208' will disengage from the limiting groove on the top surface of the swing arm 201', thereby driving the second force storage module 207' to release its clamping.

[0129] The bottom end of the telescopic sleeve 209 ′ is disposed in the outer spiral tube 206 ′. Specifically, a plurality of guide posts may be provided on the telescopic sleeve 209 ′ for guiding the axial displacement of the inner spiral tube 210 ′.

[0130] One end of the inner coil 210' passes through the second power storage module 207'. The outer wall of the inner coil 210' is provided with a slide groove, through which the inner coil 210' is slidably mounted on the telescopic sleeve 209'. Thus, the telescopic sleeve 209' and the inner coil 210' form a retractable structure to save space.

[0131] The medicine discharging process of the passive medicine storage and pushing unit provided in this embodiment also includes two processes: ratchet drive and retraction drive.

[0132] Ratchet drive: The driving module 202' works, driving the swing arm 201' to rotate in the first direction, and drives the ratchet 204', the outer screw 206', and the limiting plate 208' to rotate in the first direction through the pushing module 203'. At this time, the limiting plate 208' slides out of the limiting groove on the swing arm 201', and the second force storage module 207' releases and clamps the inner screw 210'. At this time, the outer screw 206', the second force storage module 207' and the inner screw 210' can be regarded as fixedly connected, and the inner screw 210' also rotates in the first direction. Since the push plug 211' is set in the liquid storage tank 212' and cannot rotate, the rotational motion of the inner screw 210' is converted into a linear stepping motion of the push plug 211', and the inner screw 2111' is rotated out, thereby driving the push plug 211' to axially displace away from the outer screw 206', pressing out the liquid in the liquid storage tank 212'. At this time, the anti-retraction module 205 ′ passes over the ratchet 204 ′, and does not restrict the rotation of the ratchet 204 ′.

[0133] During the retraction drive, the drive module 202' operates, driving the swing arm 201' to rotate in the second direction. Since the retraction stop module 205' abuts the teeth of the ratchet 204' to prevent it from rotating, the swing arm 201' rotates relative to the outer solenoid 206. Due to the axial limitation of the swing arm 201' and the ratchet 204', the outer solenoid 206' is unscrewed, driving the axial displacement of the torsion spring, the inner solenoid 210', the inner screw 2111', and the push plug 211', thereby expelling the liquid from the liquid storage tank 212'. At this time, the push module 203' slides off the surface of the ratchet 204'. It can be understood that this retraction process also drives drug infusion, eliminating idle travel and minimizing structural energy consumption.

[0134] In order to better understand the working process of the driving device 20', a specific embodiment is described below. In combination with Figures 19 and 20, in this embodiment, the two driving modules 202' are respectively the first driving wire 2021' and the second driving wire 2022', and the two pushing modules 203' are respectively the first pushing module 2031' and the second pushing module 2032', which are staggered at an angle of half a tooth. That is, when the first pushing module 2031' is located at the root of the ratchet 204', the second pushing module 2032' is located in the middle of the two teeth; the two stop modules 205' are respectively The first stop module 2051' and the second stop module 2052' are staggered by half a tooth, just like the push module 203'. To ensure that each drive rotates half a tooth, two swing arm limit posts are provided at both ends of the swing arm 201'. The first swing arm limit post and the second swing arm limit post are provided on the bottom plate. When the swing arm 201' rotates to the swing arm limit post, the angle is half a tooth. The swing arm 201 stops rotating when the swing arm 201 rotates to the swing arm limit post. Specifically, a detection brush can be provided on the swing arm limit post. When the swing arm contacts the limit post, the brush is connected, and the power supply is stopped at this time, thereby stopping the swing arm from rotating. The working process of the drive device 20' of this embodiment is described below.

[0135] In the first stage, the first driving wire 2021' is energized, driving the swing arm 201' to rotate clockwise in the front view direction, and the first pushing module 2031' pushes the ratchet 204' to rotate clockwise, and the outer screw 206' also rotates clockwise in the same direction, driving the limiting plate 208' to rotate. When the limiting plate 208' slides out of the upper limit slot of the swing arm 201', the second force storage module 207' releases and clamps the inner screw 210'. At this time, the outer screw 206', the torsion spring and the inner screw 210' can be regarded as fixedly connected. When rotating clockwise, the inner screw is screwed out, thereby driving the push plug 211' to axially displace and complete the injection.

[0136] In the second stage, the second drive wire 2022' is energized, driving the swing arm 201' to rotate counterclockwise in the forward direction. The first anti-retraction module 2051' presses against the tooth surface of the ratchet 204' to prevent it from rotating. At this time, the swing arm 201' rotates relative to the outer screw tube 206'. Due to the axial limitation of the swing arm 201' and the ratchet 204', the outer screw tube 206' is screwed out, driving the torsion spring, inner screw tube 210', inner screw, and push plug 211' to axially move, completing the injection.

[0137] In the third stage, the first driving wire 2021' is energized, and the second driving module 2032' drives the ratchet 204' to rotate, completing one injection. This process is similar to the first stage and will not be described in detail.

[0138] In the fourth stage, the second driving wire 2022' is energized, and the second stop module 2052' is activated to complete a liquid injection. This process is similar to the second stage and will not be described in detail.

[0139] This cycle repeats itself. It is understandable that the first pushing module 203 ′ and the second pushing module 203 ′ need to rotate one tooth pitch alternately.

[0140] It should be noted that the amount of liquid injected each time is determined by the upward displacement of the push plug 211', and the upward displacement of the push plug 211' is related to the rotation angle of the swing arm 201', the number of teeth and rotation angle of the ratchet 204', the outer screw 206', the inner screw 210', and the thread pitch of the inner screw. For example, the more teeth the ratchet 204' has, the smaller the rotation angle generated each time, and the smaller and more accurate the dosage of medicine injected each time. Therefore, those skilled in the art can set the rotation angle of the swing arm 201', the number of teeth and rotation angle of the ratchet 204', the outer screw 206', the inner screw 210', and the thread pitch of the inner screw 2111' according to the needs of the amount of medicine injected each time.

[0141] In order to realize the knowledge of the liquid capacity of the liquid storage tank 212' during the injection and dispensing processes, as shown in Figures 19 and 21, the driving device 20' also includes a first step detection module, including a drug quantity detection piece 2131' and a first external brush 2132'. One end of the drug quantity detection piece 2131' is fixed to the bottom of the ratchet 204' and connected to the first external brush 2132', and the other end is set on the inner wall of the outer screw tube 206'. When the user does not inject the drug, the tail claw of the telescopic sleeve 209' and the slide groove of the inner screw tube 210' cooperate and buckle, and the head of the telescopic sleeve 209' is located inside the outer screw tube 206', playing a guiding role during the injection and preventing excessive radial runout during the injection. At this time, the fixed drug quantity detection piece 2131' is not conductive and there is no signal. During the injection process of the liquid storage tank 212', when the liquid in the liquid storage tank 212' increases, the plunger 211' drives the inner coil 210' to move axially along the telescopic sleeve 209' toward the outer coil 206'. When the liquid increases to a preset volume, the head of the telescopic sleeve 209' stops moving downward under the action of the limit piece at the bottom of the outer coil 206', and the corresponding tail claw disengages from the buckle position and moves upward relative to the inner coil 210'. The drug quantity detection piece 2131' contacts the inner coil 210', the circuit is turned on, and the system triggers the second storage module 207' to clamp the inner coil 210' according to the preset program; it should be noted that the preset volume here is the minimum capacity required for one injection, that is, the minimum injection amount; when the user injects the maximum amount of medicine, the claws of the telescopic sleeve 209' and the inner coil 210' are completely combined. During the drug dispensing process, when the liquid in the liquid storage tank 212' reaches the preset volume, an alarm will be triggered to prompt the user to replenish the liquid medicine; when the liquid in the liquid storage tank 212' is lower than the preset volume, the drug quantity detection piece 2131' will be separated from the contact with the inner spiral tube 210', and the circuit will be disconnected, informing the system of the remaining amount of medicine at this time and prompting the user to replenish the liquid medicine.

[0142] The driving device 20' provided in this embodiment can also realize real-time injection amount detection. In some embodiments, the first step detection module also includes a detection resistor 2133' and a detection brush 2134'; the detection resistor 2133' is a high-resistance resistor as a whole, fixed to the bottom of the ratchet 204', and electrically connected to the first external brush 2132'. The detection brush 2134' is set at the bottom of the outer coil 206'; when the ratchet 204' rotates and the outer coil 206' steps, the detection brush 2134' and the detection resistor 2133' form a loop, which is connected to the first external brush 2132'. Therefore, the resistance value will change each time the ratchet 204' rotates and the outer coil 206 steps, thereby obtaining the amount of each movement, which is then converted into real-time injection amount through the system chip.

[0143] In some embodiments, the driving device 20' may further include a second step detection module, as shown in Figure 22, specifically including a second external brush 2141' and a rotation detection piece 2142'. The rotation detection piece 2142' may specifically be a metal cap with a notch, provided with multiple notches, and the notch positions are unevenly arranged, distributed in an increasing form or in a large and small grid format, and can also be detected during reversal. The rotation detection piece 2142' is fixed to the bottom of the ratchet 204' and is connected to the second external brush 2141'. When the rotation detection piece 2142' rotates to the notch part, the circuit is disconnected. When it rotates to the non-notch metal part, it is connected to the second external brush 2141', thereby realizing rotation detection, and then converting it into real-time liquid injection volume through the system chip.

[0144] In summary, compared with the prior art, the driving device provided in this embodiment no longer requires the use of motors, reducers, etc., which reduces manufacturing costs; it reduces the size and weight, making it easier to use and carry; due to the reduced size, more injection sites can be selected, such as the abdomen, limbs, etc., which can reduce the possibility of complications caused by always injecting the same site; and it eliminates the impact of noise, making the use process more comfortable, and the output more stable, direct, and reliable, which is conducive to accurately controlling the amount of insulin injected into the patient and ensuring the patient's health.

[0145] The above is an introduction to the structure and working process of the driving device 20'. The liquid output from the liquid storage tank 212' will be injected into the subcutaneous tissue of the human body through the liquid-conducting tube 40' or through the hard needle through the needle-assisting device 30'. The needle-assisting device 30' includes a track pressure plate 301', a soft needle slider 302', a hard needle slider 303', a second connecting rod 304', a first force storage module 305', a limiter 306' and a trigger assembly 307'. The following is an introduction to the structure of each part of the needle-assisting device 30'.

[0146] The track pressing plate 301' is fixed on the bottom plate 10' and is provided with tracks for placing the hard needle slider 303' and the soft needle slider 302'. The hard needle slider 303' and the soft needle slider 302' can slide along the tracks.

[0147] The needle slider 302', used to secure the needle, slides onto the track of the track pressure plate 301'. To prevent the slider from rebounding, a needle stopper is installed at the bottom of the track pressure plate 301'. When the slider 302' reaches the bottom of the track pressure plate 301', the stopper prevents the slider from returning to its original position.

[0148] The hard needle slider 303' is slidably mounted on the track of the track pressure plate 301' and is connected to the other end of the second connecting rod 3042'. It is driven by the second connecting rod 3042'. The hard needle slider 303' is used to fix the hard needle. The hard needle can be connected to the liquid storage tank 212' through a catheter or directly.

[0149] The second connecting rod 304' includes a first connecting rod 3041' and a second connecting rod 3042' connected to each other. The first connecting rod 3041' and the second connecting rod 3042' are a linkage mechanism, that is, when the first connecting rod 3041' rotates, it will drive the second connecting rod 3042' to rotate. The first connecting rod 3041' is connected to the hard needle slider 303' and is used to drive the hard needle slider 303' to move; the second connecting rod 3042' is connected to the first force storage module 305' through a pin shaft, and is used to drive the second connecting rod to rotate when the first force storage module 305' releases elastic potential energy, thereby driving the hard needle slider 303' and the needle slider to move. It can be understood that one end of the first force storage module 305' is fixed on the base plate 10' and does not move. Its function is to trigger the rotation of the second connecting rod 304'.

[0150] The limiting member 306' is fixed on the bottom plate 10' and is used to limit the movement of the first force storage module 305', the hard needle slider 303' or the second connecting rod 304', thereby keeping the first force storage module 305' in a compressed force storage state to store elastic potential energy.

[0151] The trigger assembly 307' includes a rotating shaft, a push rod 3071' and a trigger rod 3072'. The rotating shaft is fixed on the base plate 10', and the trigger rod 3072' and the push rod 3071' are fixed on the rotating shaft. One end of the trigger rod 3072' is limited by the limiting surface of the ratchet 204, and the other end is fixed on the base plate 10' and connected to one end of the push rod 3071'. The push rod 3071' is arranged below the limiting member 306'. It should be noted that in the initial state, the push rod 3071' lifts the limiting member 306'. When the trigger rod 3072' rotates, it will drive the push rod 3071' to rotate. At this time, the limiting member 306' falls and no longer limits the movement of the hard needle slider 303' or the two connecting rods.

[0152] Based on the understanding of the structure of the needle-assisting device 30 ′ provided in this embodiment, its working process and principle are introduced below.

[0153] In the initial state, the limiting surface of the ratchet 204' limits the trigger rod 3072', the push rod 3071' lifts the limiting member 306', and the limiting member 306' limits the movement of the hard needle slider 303' or the second connecting rod, so that the first power storage module 305' remains in a compressed state.

[0154] When the driving device 20' is working, the ratchet 204' rotates. When the trigger rod 3072' passes the limiting surface of the ratchet 204', it drives the top rod 3071' to rotate, the limiting piece 306' falls, and the hard needle slider 303' or the second connecting rod disengages from the limit of the limiting piece 306'. At this time, the first force storage module 305' is released, driving the second connecting rod 3042' to rotate, thereby driving the first connecting rod 3041' to rotate, and then driving the hard needle slider 303' and the soft needle slider 302' to move downward along the track of the track pressure plate 301', and the hard needle and soft needle enter the user's subcutaneous tissue for injection, thereby completing the needle assist. After that, the soft needle slider 302' is limited at the bottom of the track pressure plate 301', and the soft needle remains in the subcutaneous tissue. The hard needle slider 303' rebounds and resets under the action of the first force storage module 305', driving the hard needle to reset. The needle-assisting device 30' of this embodiment assists the needle subcutaneously, the hard needle automatically rebounds, and the soft needle remains subcutaneously, which reduces the risk of infection and has good antibacterial and sealing properties; the soft needle is placed subcutaneously to inject drugs, which causes little pain and is convenient for patients to move around without worrying about the needle falling off; compared to an insulin injection pen, which requires at least 4 injections a day, the present subcutaneous drug infusion device can be used for at least 3 days with one needle-assisting operation, reducing the number of injections and causing less psychological and physical trauma to the patient.

[0155] It should be noted that the above-mentioned limit member 306 can have various forms to achieve the movement limitation of the first force storage module 305', the hard needle slider 303' or the two connecting rods. Those skilled in the art can set the structure of the limit member 306' as needed. The structure and function of the limit member 306' are described below with three embodiments.

[0156] In some embodiments, in combination with Figures 24, 25 and 26, the needle-assisting device 30' and the driving device 20' are arranged horizontally, the limiting member can be a limiting plate 306', and the second connecting rod 3042' is provided with a slot adapted to the limiting plate 306', and the movement of the second connecting rod 3042' is limited by the cooperation between the limiting plate 306' and the slot. Specifically, in the initial state, the limiting plate 306' is lifted by the push rod 3071', thereby engaging with the slot of the second connecting rod 3042', thereby suppressing the first force storage module 305' by limiting the second connecting rod 3042'; when the trigger rod 3072' passes over the limiting surface of the ratchet 204', driving the push rod 3071' to rotate, the limiting plate 306' falls and disengages from the second connecting rod 3042', and the movement of the second connecting rod 3042' is no longer restricted, thereby the first force storage module 305' is released from the limit, driving the second connecting rod 3042' and the first connecting rod 3041' to rotate, and then driving the hard needle slider 303' and the soft needle slider 302' to slide, completing the needle-assisting process.

[0157] In some embodiments, in combination with Figures 26 and 27, the needle-assisting device 30' and the driving device 20' are arranged longitudinally, and the limiting member can be a first limiting rod 306', one end of which is fixed to the base plate 10' through a pin and can rotate around the pin, thereby limiting the movement of the hard needle slider 303' through the first limiting rod. Specifically, in the initial state, the other end of the first limiting rod is lifted by the push rod 3071', thereby counteracting the hard needle slider 303', thereby achieving the suppression of the first force storage module 305' by limiting the hard needle slider 303'; when the trigger rod 3072' passes over the limiting surface of the ratchet 204', it drives the push rod 3071' to rotate, and at this time the first limiting rod rotates, and the hard needle slider 303' is disengaged from the limit of the first limiting rod, thereby the first force storage module 305' is disengaged from the limit and released, driving the second connecting rod 3042' and the first connecting rod 3041' to rotate, and then driving the hard needle slider 303' and the soft needle slider 302 to slide, completing the needle-assisting process.

[0158] In some embodiments, in combination with what is shown in FIG28, the needle-assisting device 30' and the driving device 20' are longitudinally arranged, and the limiting member may include a second limiting rod 306' and a limiting pressure plate 3061', one end of the second limiting rod is fixed to the base plate 10' through a pin shaft, and one end of the limiting pressure plate is fixed to the track pressure plate 301', and a limiting groove is provided on the limiting pressure plate, and the limiting groove is used to limit the movement of the hard needle slider 303'. Specifically, in the initial state, the other end of the second limiting rod is lifted by the push rod 3071', thereby abutting against the limiting pressure plate. At this time, the limiting groove limits the hard needle slider 303', and the hard needle slider 303' cannot move, thereby achieving the suppression of the first force storage module 305' by limiting the hard needle slider 303'; when the trigger rod 3072' passes over the limiting surface of the ratchet 204', driving the push rod 3071' to rotate, the second limiting rod rotates at this time, and the limiting pressure plate is disengaged from the contact with the hard needle slider 303', thereby the first force storage module 305' is disengaged from the limit and released, driving the second connecting rod 3042' and the first connecting rod 3041' to rotate, and then driving the hard needle slider 303' and the soft needle slider 302' to slide, completing the needle-assisting process.

[0159] In some embodiments, as shown in Figure 29, the needle-assisting device 30' and the driving device 20' are arranged longitudinally, including a limiting plate 306', one end of which is fixed on the base plate 10', and the trigger rod 307' is constrained on the base plate 10'. A limiting groove is provided on the limiting plate, and the limiting groove is used to limit the movement of the hard needle slider 303'. Specifically, in the initial state, one end of the trigger rod 307' is against the limiting groove, and the other end is limited by the ratchet. At this time, the limiting groove limits the hard needle slider 303', and the hard needle slider 303' cannot move, thereby achieving the suppression of the first force storage module 305' by limiting the hard needle slider 303'; when the other end of the trigger rod passes over the limiting surface of the ratchet 204' and rotates, the limiting groove disengages from the contact with the hard needle slider 303', thereby the first force storage module 305' disengages from the limit and is released, driving the second connecting rod 3042' and the first connecting rod 3041' to rotate, and then driving the hard needle slider 303' and the soft needle slider 302' to slide, completing the needle-assisting process.

[0160] It can be understood that when the passive drug storage and pushing unit provided in this embodiment is working, the drug liquid is first injected into the liquid storage tank, and then the driving device works to remove the air in the catheter. After a period of time, the needle removal module is triggered to complete the needle assistance, and then the driving device continues to work to complete the drug injection through the catheter.

[0161] The passive drug storage push unit provided in this embodiment adopts a driving mode in which a ratchet screw cooperates with each other, has a high degree of integration, reduces manufacturing costs and energy consumption, reduces weight, and is easy to use and carry; it adopts a drug injection detection module, and the output is more stable, direct, and reliable, which is conducive to precise control of the amount of drug injection for the patient; the needle-assisting device assists the needle subcutaneously, the hard needle automatically rebounds, and the soft needle remains subcutaneously, which reduces the number of needle punctures, reduces the risk of infection, and has good antibacterial and sealing properties.

[0162] In this application, the term "plurality" refers to two or more, unless expressly limited otherwise. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean fixed, removable, or integral; "connected" can mean directly or indirectly through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0163] In the description of this application, it should be understood that the terms "up", "down", "left", "right", "front", "back", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this application.

[0164] Throughout this specification, terms such as "a specific embodiment," "some embodiments," or "an embodiment" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present application. Throughout this specification, schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0165] The drug injection device provided in the embodiment of the present application utilizes a detachable connection between the reuse control unit and the passive drug storage and push unit, allowing the electronic and mechanical parts of the drug injection device to be separated and plugged and unplugged, thereby making the electronic part reusable, reducing environmental pollution and costs. The provision of an external control unit makes the drug injection device intelligent, eliminating the need for manual injection, greatly improving the user experience. Furthermore, the reuse control unit charging unit has two reuse control unit charging ports, which can charge two reuse control units simultaneously. The reuse control unit charging unit itself also has a second rechargeable battery, i.e., a power storage function, eliminating the need to connect a charging cable during use.

[0166] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of this application. It should be understood that the above description is only the specific implementation methods of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A drug injection device, wherein: The drug injection device comprises: a passive drug storage pushing unit, a multiplexing control unit and a multiplexing control unit charging unit; The passive drug storage pushing unit comprises a drug storage module, a mechanical pushing module and an injection mechanism; the mechanical pushing module is connected to the drug storage module; the injection mechanism is connected to the drug storage module and the mechanical pushing module respectively; The multiplexing control unit is detachably connected to the passive drug storage pushing unit; the multiplexing control unit includes a control module and a first rechargeable battery, and the first rechargeable battery is electrically connected to the control module; the multiplexing control unit is connected to the passive drug storage pushing unit to form a drug injection unit; The multiplexing control unit charging unit is detachably connected to the multiplexing control unit, and the multiplexing control unit charging unit is used to supply power to the multiplexing control unit.

2. The drug injection device according to claim 1, wherein: The multiplexing control unit in the drug injection device is connected to an external control unit. Preferably, the external control unit is connected to the multiplexing control unit wirelessly or an interface for connecting to the outside is provided on the multiplexing control unit; or the external control unit and the multiplexing control unit are integrated into an integrated structure.

3. The drug injection device according to claim 2, wherein: When the multiplexing control unit and the passive drug storage pushing unit are connected and disconnected, the external control unit can be connected to the multiplexing control unit; and / or After the passive drug storage push unit initially confirms the drug capacity, when the passive drug storage push unit is connected to the reuse control unit again, the external control unit cannot continue to perform the control function; and / or After the multiplexing control unit is initially connected to the external control unit, the multiplexing control unit cannot be connected to the external control unit in other drug injection devices during subsequent repeated use.

4. The drug injection device according to claim 1, wherein: The passive medicine storage pushing unit also includes a first shell; the first shell includes a first box body, a first cover body, and a reuse control unit accommodating area and a passive medicine storage pushing unit accommodating area formed by the first box body and the first cover body; the first cover body is buckled on the top of the first box body and is connected and fixed to the first box body.

5. The drug injection device according to claim 4, wherein: The first box body has a multiplexing control unit fixing part and a connecting male or female socket; the multiplexing control unit fixing part is arranged in the multiplexing control unit accommodating area; the connecting male socket is connected and fixed to the first box body in the multiplexing unit accommodating area.

6. The drug injection device according to claim 1, wherein: The reuse control unit also includes a second shell; the second shell includes a second box body, a second cover body, and a accommodating area formed by the second box body and the second cover body; the second cover body and the second box body are connected and fixed; the second box body has a connecting female socket or a male socket connected and fixed to the second box body; the accommodating area is used to accommodate the first rechargeable battery and the control module.

7. The drug injection device according to claim 1, wherein: The multiplexing control unit also includes an alarm module; the alarm module is electrically connected to the control module.

8. The drug injection device according to claim 1, wherein: The multiplexing control unit charging unit has one or more sets of second rechargeable batteries and / or an external power supply interface; and One or more groups of multiplexed control unit charging ports.

9. A connection device, wherein: The connecting device includes a male socket and a female socket, the male socket includes a bracket, a flexible cable, and a sealing sleeve, wherein pins are provided at both ends of the flexible cable, one end of the flexible cable is wrapped on the bracket, and the sealing sleeve is arranged on the bracket and the flexible cable to be connected to the female socket and realize waterproof sealing.

10. The connection device according to claim 9, wherein: The female socket includes a flexible cable and a physical interface. Pins are arranged at both ends of the flexible cable, and one end of the pin is electrically connected to the physical interface pin.

11. A drug injection system, comprising the drug injection device according to any one of claims 1 to 8 and the connecting device according to claim 9 or 10.

12. The drug injection system according to claim 11, wherein: The male socket can be connected to or integrated with the passive drug storage pushing unit, and the female socket can be connected to or integrated with the reuse control unit to achieve physical and electrical connection between the passive drug storage pushing unit and the reuse control unit.

13. The drug injection system according to claim 11, wherein: The female socket can be connected to or integrated with the passive drug storage pushing unit, and the male socket can be connected to or integrated with the reuse control unit to achieve physical and electrical connection between the passive drug storage pushing unit and the reuse control unit.

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