Split medicine injection system

Abstract

The present application relates to a medicine injection device, a connecting device and a medicine injection system. The medicine injection device comprises a passive medicine storage and pushing unit

Description

TECHNICAL FIELD This application relates to the field of medical device technology, and in particular to a medicine injection device. BACKGROUND Wearable medical devices are electronic medical devices that are wearable and portable, and are mainly used for health monitoring, disease treatment, and remote rehabilitation. Currently, wearable injection devices on the market generally suffer from problems such as excessive size and weight, inconvenience in carrying, high price, and single-use electronic modules. In addition, there are issues such as the lack of interactive control via Handheld mobile terminals, requiring patients to manually complete the patch application and needle-insertion process by using a needle-insertion device, resulting in insufficient intelligence at the control end and a poor user experience. Future wearable medical devices will develop towards high integration, diversified measurement, low power consumption, and long battery life. Wireless transmission is the foundation 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 propose higher application requirements on wireless transmission technology. SUMMARY The object of this application is to provide a medicine injection device that enables intelligent medicine injection and allows the electronic module of the medicine injection device to be reused. To achieve the above object, this application provides a medicine injection device, which comprises: a passive medicine storage and pushing unit, a reusable control unit, and a charging unit of reusable control unit; the passive medicine storage and pushing unit comprises a medicine storage module, a mechanical pushing module, and an injection mechanism; the mechanical pushing module is connected to the medicine storage module; the injection mechanism is separately connected to the medicine storage module and the mechanical pushing module; the reusable control unit is detachably connected to the passive medicine storage and pushing unit; the reusable control unit comprises a control module and a first rechargeable battery, the first rechargeable battery is electrically connected to the control module; the reusable control unit is connected to the passive medicine storage and pushing unit to form a medicine injection unit; and the charging unit for the reusable control unit is detachably connected to the reusable control unit, and the charging unit for the reusable control unit is used to charge the reusable control unit. In one embodiment, the charging unit for the reusable control unit has one or more sets of second rechargeable batteries and one or more sets of charging ports for reusable control unit. In one embodiment, the charging unit for the reusable control unit does not have a battery, but instead has an external power interface. In one embodiment, the charging unit for the reusable control unit may have both a battery and an external power interface. In one particular embodiment, the reusable control unit in the medicine injection device is connected to an external control unit. Preferably, the external control unit is connected to the reusable control unit wirelessly, or the reusable control unit is equipped with an interface for external connection; or the external control unit and the reusable control unit are integrated into a single structure. In one particular embodiment, when the reusable control unit and the passive medicine storage and pushing unit are connected and disconnected, the external control unit is capable of connecting to the reusable control unit; and / or after the passive medicine storage and pushing unit initially confirms the medicine capacity, the external control unit cannot continue to perform control functions if the passive medicine storage and pushing unit reconnects to the reusable control unit; and / or after the initial connection between the reusable control unit and the external control unit, the reusable control unit cannot be connected to the external control unit in other medicine injection devices during subsequent reuse. The reusable control unit and the external control unit exchange signals wirelessly. When the reusable control unit detects that it is disposed inside a charging unit of reusable control unit, it will turn on the charging circuit, thereby allowing the charging unit for the reusable control unit to charge it. When the reusable control unit detects that it is removed from the charging unit of reusable control unit, it will automatically detect its own power level and broadcast the Battery level information to the external control unit. If the power level does not reach the requirements for operation (the power does not meet the requirements for a complete usage cycle), the external control unit cannot wirelessly connect with the reusable control unit. When the power level of the reusable control unit reaches the requirements for operation, regardless of whether the reusable control unit is electrically connected to the passive medicine storage and pushing unit through an interface, the external control unit can wirelessly connect with the reusable control unit and enter a standby state. Its connection is uniquely identified by a key, and the reusable control unit can only be bound to a unique external control unit. When the external control unit and the reusable control unit complete a wireless connection, and the reusable control unit detects that the passive medicine storage and pushing unit is electrically connected to it via an interface, a signal indicating completion of the connection is sent to the external control unit; the external control unit issues a prompt message for medicine filling; when the medicine is filled to a specified dose, the reusable control unit detects a signal indicating completion of the medicine filling, and then sends the signal indicating completion of the medicine filling to the external control unit; when the medicine injection unit is applied to the designated site of the application subject, the operator sends a signal for needle-insertion to the reusable control unit via the external control unit, and the reusable control unit controls the mechanical pushing module to operate and trigger the injection mechanism to perform the action of needle-insertion, and sends a signal indicating completion of needle-insertion to the external control unit when the action of needleinsertion is completed. After the external control unit receives the signal indicating completion of needle-insertion, the operator will send a preset configuration for medicine infusion to the reusable control unit. The reusable control unit is connected to the passive medicine storage and pushing unit via an electrical interface, and controls the mechanical pushing module in the passive medicine storage and pushing unit to apply pressure to the medicine storage module according to the preset configuration for medicine infusion. Under the pressure, the medicine enters the injection mechanism from the medicine storage module and is injected into the body of the application subject through the injection mechanism, thereby completing the infusion action. After the reusable control unit is electrically connected to the medicine storage module and completes the medicine filling (initial confirmation of medicine capacity), once the reusable control unit detects that its electrical connection is disconnected, it will generate a corresponding vibration and sound alarm, and send the alarm information to the external control unit Furthermore, after this medicine filling (initial confirmation of medicine capacity), the reusable control unit cannot operate to the next step if the medicine storage module is reconnected to it. During normal use of the medicine injection unit, when the reusable control unit detects an abnormality in the electrical signal feedback from its operating software or medicine storage module (such as occlusion breakage of driving wire, medicine depletion in the reservoir, power depletion of the reusable control unit, or abnormal infusion), the medicine injection unit will vibrate and sound an alarm accordingly, and simultaneously send the alarm information to the external control unit. The operating status information, detection data, alarm information, etc. of the medicine injection unit will be wirelessly transmitted to the external control unit, and uploaded to the data storage server when there is a network. When the medicine injection unit is stopped by receiving a deactivation command from the external control unit, its wireless connection will be disconnected and will not be reconnected before the start of a new operation cycle. The reuse control module and the medicine storage module are disassembled, and the reuse control module is disposed in the charging unit for the reusable control unit for charging. When the reusable control unit has sufficient power to meet the requirements for operation, it can be removed from the charging unit for the reusable control unit and wirelessly connected to the external control unit, so as to start a new operation cycle of medicine infusion in combination with the new medicine storage module. Since this reusable control unit is bound to the external control unit during initial use, no key authentication is required for subsequent use, and it cannot wirelessly connect to other external control units. Preferably, the passive medicine storage and pushing unit further comprises a first housing; the first housing comprises a first box, a first cover, and an accommodating area of reusable control unit and an accommodating area of passive medicine storage and pushing unit formed by the first box and the first cover; the first cover is fastened to the top of the first box and is welded by laser. More preferably, the first box has a fixing member of reusable control unit and a connecting male connector or female connector; the fixing member of reusable control unit is disposed in an accommodating area of the reusable control unit; the connecting male connector or female connector is injection molded together with the first box in the accommodating area of the reusable control unit; the connecting male connector has a rubber ring for waterproof sealing. More preferably, the mechanical pushing module comprises a pushing member and a plunger; the plunger extends into the medicine storage module; the pushing member is connected to the plunger and is electrically connected to the control module. Preferably, the pushing member comprises a connecting bracket, a plunger shaft, a driving wire, a ratchet, and a swing arm; The connecting bracket is electrically connected to the control module; one end of the plunger shaft is connected to the plunger, and the other end is connected to the connecting bracket; the ratchet passes through the plunger shaft; the driving wire is connected to the connecting bracket; and the swing arm is connected to the connecting bracket. More preferably, the swing 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. More preferably, the pushing member further has a trigger module of injection mechanism; the trigger module of injection mechanism is connected to the ratchet. More preferably, the injection mechanism has a medicine delivery tube, a needle-insertion module, and a medicine injection needle; One end of the medicine delivery tube is connected to the medicine storage module, and the other end passes through the needle-insertion module and is connected to the medicine injection needle; the needle-insertion module is connected to the trigger module of injection mechanism. Preferably, the reusable control unit further comprises a second housing; the second housing comprises a second box, a second cover, and an accommodating area formed by the second box and the second cover; the second cover and the second box are laser-welded; the second box has a connecting female connector or male connector that is injection molded together with the second box; the accommodating area is used to receive the first rechargeable battery and the control module. The connecting male connector has a rubber ring for waterproof sealing. Preferably, the reusable control unit further comprises an alarm module; and the alarm module is electrically connected to the control module. The medicine injection device in an embodiment according to this application allows the electronic and mechanical parts of the medicine injection device to be separated through the detachable connection between the reusable control unit and the passive medicine storage and pushing unit. This allows for easy plugging and unplugging, thereby enabling the electronic parts to be reused, and reducing environmental pollution and costs. The external control unit enables the medicine injection device to be intelligent, eliminating the need for manual needle-insertion and greatly improving the user experience. Meanwhile, the charging unit for the reusable control unit has two charging ports for reusable control units, which can charge two reusable control units at the same time. The charging unit for the reusable control unit itself further has a second rechargeable battery, which has a power storage function. This eliminates the hassle of connecting a charging cable during use. In another embodiment, the passive medicine storage and pushing unit comprises a bottom plate, a driving device, and a needle assistance device; wherein the bottom plate is configured to fix the driving device and the needle assistance device; and the driving device comprises: a driving module, a pushing mechanism, a rotary wheel, a first threaded rod, a second threaded rod and a propulsion module; wherein the driving module is configured to drive the pushing mechanism to rotate along a first direction and a second direction, the pushing mechanism provided with a thread, the rotary wheel is driven to rotate by the pushing module, thereby realizing rotation along the first direction; the first threaded rod is capable of rotating synchronously with the rotary wheel and / or being axially displaced relative to the rotary wheel and being in threaded connection with a thread on the pushing module and with a thread on the second threaded rod; the second threaded rod is fixedly connected to a plunger, and the propulsion module comprises a plunger and a liquid storage tank; wherein the liquid storage tank is fixed on the bottom plate and is used for storing a liquid. In one particular embodiment, the driving process of the passive medicine storage and pushing unit comprises: when the pushing mechanism rotates along the first direction, it drives the rotary wheel to rotate synchronously along the first direction, the first threaded rod rotates synchronously with the rotary wheel and rotates relative to the second threaded rod, at this time the second threaded rod moves axially relative to the first threaded rod, thereby pushing the plunger to move; then, when the pushing mechanism rotates along the second direction, the rotary wheel does not rotate, and the first threaded rod does not rotate; the first threaded rod moves axially relative to the pushing mechanism, thereby driving the second threaded rod to move synchronously, and pushing the plunger to move; and wherein the first direction is clockwise or counterclockwise, and the second direction is opposite to the first direction. In one particular embodiment, the pushing mechanism comprises a swing arm, a pushing module, and an anti-reverse module; wherein the pushing module is connected to the swing arm and drives the swing arm to rotate along a first direction and a second direction; and the pushing module drives the rotary wheel to rotate along the same direction as the first direction, and the anti-reverse module acts on the rotary wheel to control the rotary wheel to rotate in one direction; preferably the rotary wheel is a ratchet. In one particular embodiment, the first threaded rod is an outer threaded tube, which is located inside the rotary wheel and can rotate synchronously with the rotary wheel and / or move axially relative to the rotary wheel; the outer wall of the first threaded rod is threaded and threadedly connected to the threaded hole of the swing arm, and the inner wall of the first threaded rod is threaded and threadedly connected to the second threaded rod; preferably, one end of the plunger is provided with an outer threaded rod, which is threadedly connected to the inner wall of the first threaded rod; and the liquid storage tank is fitted around the outside of the plunger, and the plunger is limited in rotation. In one particular embodiment, the first threaded rod comprises an outer threaded tube, an inner threaded tube, a second energy storage module, a limiting plate, and a telescopic sleeve; the inner threaded tube has threads on its inner wall for connection to the outer threaded tube, one end of the inner threaded tube passes through the second energy storage module; the outer wall of the inner threaded tube is provided with a sliding groove, through which it slides onto the telescopic sleeve; the top of the inner wall of the outer threaded tube is provided with a torsion spring limiting area; the second energy storage module is located within the torsion spring limiting area of the outer threaded tube; the limiting plate is connected to the second energy storage module, the limiting plate is fixed on the top surface of the outer threaded tube and is engaged in the limiting groove on the top surface of the swing arm; the second energy storage module is limited in the telescopic sleeve of the outer threaded tube by the limiting plate, and one end of it is arranged inside the outer threaded tube for guiding the axial displacement of the inner threaded tube; and the outer wall of the outer threaded tube is threaded and threadedly connected to the pushing module. In one particular embodiment, the needle assistance device comprises a track pressing plate, a soft needle slider, a hard needle slider, a two-link rod, a first energy storage module, a limiting member, and a trigger rod; the track pressing plate is fixed on the bottom plate; the soft needle slider is used to fix the soft needle, and is located on the track of the track pressing plate; the hard needle slider is located on the track of the track pressing plate, and is above the soft needle slider for fixing the hard needle, and the hard needle is connected to the liquid storage tank; the two-link rod comprises a first link rod and a second link rod, wherein the first link rod is connected to the hard needle slider, and the second link rod is connected to the first energy storage module through a pin shaft, when the first energy storage module releases elastic potential energy, the two-link rod is driven to rotate; the limiting member is fixed on the bottom plate for limiting the movement of the first energy storage module, the hard needle slider or the two-link rod, thereby keeping the first energy storage module in a compressed state; and the trigger rod is constrained on the bottom plate, one end of the trigger rod is limited by the limiting surface of the rotary wheel, and the other end of the trigger rod is used to limit the limiting member. In one particular embodiment, the medicine dispensing process of the passive medicine storage and pushing unit comprises: rotary wheel driving: when the driving module is working, the rotary wheel as a ratchet drives the swing arm to rotate along the first direction, the pushing module drives the ratchet, the outer threaded tube, and the limiting plate to rotate along the first direction, at this time the limiting plate slides out of the limiting groove, and the second energy storage module releases and holds the inner threaded tube, the inner threaded tube rotates along the first direction, due to the rotation limit of the plunger, the inner threaded rod screws out, thereby driving the plunger to move axially and pressing out the liquid in the liquid storage tank; retraction driving: when the driving module is working, the swing arm is driven to rotate along the second direction, the anti-reverse module abuts against tooth surface of the ratchet to prevent it from rotating, due to the axial limitation of the swing arm and ratchet, the outer threaded tube screws out, thereby driving the torsion spring, inner threaded tube, inner threaded rod and plunger to move axially, and pressing out the liquid in the liquid storage tank. In one particular embodiment, the driving device further comprises a first stepping detection module comprising a medicine quantity detecting plate and a first external electric brush, wherein one end of the medicine quantity detecting plate is fixed to the bottom of the rotary wheel and connected to the first external electric brush, and the other end is disposed on the inner wall of the outer threaded tube; during the medicine injection process of the liquid storage tank, as the liquid in the liquid storage tank increases, the plunger drives the inner threaded tube to move axially towards the outer threaded tube, when the liquid increases to a preset volume, the medicine quantity detecting plate contacts the inner threaded tube, and the circuit is turned on, then the system determines that the second energy storage module can be triggered to hold the inner threaded tube; during the medicine dispensing process, when the liquid level in the liquid storage tank falls below the preset volume, the medicine quantity detecting plate disengages from the contact with the inner threaded tube, at this time the circuit is disconnected. In one particular embodiment, the first stepping detection module further comprises a detection resistor and a detection electric brush; the detection resistor is fixed to the bottom of the rotary wheel and electrically connected to the first external electric brush, and the detection electric brush is disposed at the bottom of the outer threaded tube; when the rotary wheel rotates and the outer threaded tube moves in a stepping motion, the detection electric brush and the detection resistor form a circuit and are connected to the first external electric brush, as a result the resistance changes each time when the rotary wheel rotates and the outer threaded tube moves in a stepping motion, thereby detecting the amount of movement each time. In one particular embodiment, the driving device further comprises a second stepping detection module comprising a second external electric brush and a rotation detecting plate, the rotation detecting plate has multiple notches, the rotation detecting plate is fixed to the bottom of the rotary wheel and connected to the second external electric brush; when the rotation detecting plate rotates to a notch, the circuit is disconnected, and when the rotation detecting plate rotates to a non-notch position, it is connected to the second external electric brush, thereby realizing rotation detection. In one particular embodiment, the needle assistance process of the passive medicine storage and pushing unit comprises: in the initial state, the limiting surface of the rotary wheel limits the trigger rod which lifts the limiting member, the limiting member limits the movement of the hard needle slider or the two-link rod, thereby keeping the first energy storage module in a compressed state; when the rotary wheel rotates, the trigger rod passes over the limiting surface of the rotary wheel and rotates, the limiting member falls, and the hard needle slider or the two-link rod disengages from the limitation of the limiting member, at this time the first energy storage module is released to drive the second link rod and the first link rod to rotate, as a result the hard needle slider and the soft needle slider are driven to move downward along the track of the track pressing plate, thereby completing the needle assistance process, then the soft needle slider is limited to the bottom of the track pressing plate, and the hard needle slider is reset. In one particular embodiment, the needle assistance device comprises a lifting rod, the limiting member is a limiting plate, and the second link rod is provided with a slot adapted to the limiting plate; in the initial state, the limiting plate is lifted by the lifting rod, and then engaged with the slot of the second link rod, thereby suppressing the first energy storage module by limiting the second link rod; when the trigger rod passes the limiting surface of the rotary wheel, it drives the lifting rod to rotate, at this time the limiting plate falls and disengages from the second link rod, as a result the first energy storage module is released from the limitation, thereby driving the second link rod and the first link rod to rotate. In one particular embodiment, the needle assistance device comprises a lifting rod, the limiting member is a first limiting rod, one end of the first limiting rod is fixed on the bottom plate by a pin shaft, and in the initial state, the other end of the first limiting rod is lifted up by the lifting rod, thereby abutting against the hard needle slider, and thus suppressing the first energy storage module by limiting the hard needle slider; when the lifting rod passes the limiting surface of the rotary wheel and rotates, the first limiting rod rotates, the hard needle slider disengages from the limitation of the first limiting rod, and then the first energy storage module disengages from the limitation and is released, thereby driving the second link rod and the first link rod to rotate. In one particular embodiment, the needle assistance device comprises a lifting rod, the limiting member comprises a second limiting rod and a limitation pressing plate, one end of the second limiting rod is fixed on the bottom plate by a pin shaft, and one end of the limitation pressing plate is fixed to the track pressing plate and is provided with a limiting groove; in the initial state, the other end of the second limiting rod is lifted by the lifting rod, thereby abutting against the limitation pressing plate, at this time the limiting groove limits the hard needle slider, thereby suppressing the first energy storage module by limiting the hard needle slider; when the trigger rod passes the limiting surface of the rotary wheel, it drives the lifting rod to rotate, at this time the second limiting rod rotates, and the limitation pressing plate disengages from the contact with the hard needle slider, as a result the first energy storage module disengages from the limitation and is released, thereby driving the second link rod and the first link rod to rotate. This application further relates to a connecting device, wherein the connecting device comprises a male connector and a female connector, the male connector comprises a bracket, a flexible flat cable, and a sealing sleeve; wherein the flexible flat cable has pin shafts at both ends, one end of the flexible flat cable is wrapped around the bracket, the sealing sleeve is fitted around the bracket and the flexible flat cable and can be connected to the female connector to achieve a waterproof sealing. In one particular embodiment, the female connector comprises a flexible flat cable and a physical interface, wherein the flexible flat cable has pin shafts at both ends, and the pin shaft at one end is electrically connected to the pin shaft of the physical interface. This application further relates to a medicine injection system, which comprises the medicine injection device according to this application and the connecting device according to this application. In one particular embodiment, the male connector can be connected to or integrated with the passive medicine storage and pushing unit, and the female connector can be connected to or integrated with the reusable control unit, thereby realizing the physical and electrical connection between the passive medicine storage and pushing unit and the reusable control unit. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a top view of the medicine injection device in an embodiment according to this application; Fig. 2 is a structural diagram of the control module in an embodiment according to this application; Fig. 3 is a structural diagram of the first rechargeable battery in an embodiment according to this application; Fig. 4 is a structural diagram of the second housing in an embodiment according to this application; Fig. 5 is a structural diagram of the alarm module in an embodiment according to this application; Fig. 6 is one of the partial structural diagrams of the passive medicine storage and pushing unit in an embodiment of this application; Fig. 7 is a schematic diagram showing the connection relationship between the passive medicine storage and pushing unit and the reusable control unit in an embodiment according to this application; Fig. 8 is a partial structural diagram of the passive medicine storage and pushing unit in an embodiment according to this application; Fig. 9 is a top view of the first housing in an embodiment according to this application; Fig. 10 is a front view of the first housing in an embodiment according to this application; Fig. 11 is one of the top views of the first box in an open state in an embodiment according to this application; Fig. 12 is a second top view of the first box in an open state in an embodiment according to this application; Fig. 13 is a front view of the medicine injection device in an embodiment according to this application; Fig. 14 is a structural diagram of the charging unit for the reusable control unit in an embodiment according to this application. Fig. 15 is a structural diagram of the male connector in the connecting device in an embodiment according to this application. Fig. 16 is a structural diagram of the female connector in the connecting device in an embodiment according to this application. Fig. 17 is a schematic diagram of the passive medicine storage and pushing unit in an embodiment according to this application; Fig. 18 is a schematic diagram of the driving device in an embodiment according to this application; Fig. 19 is an exploded schematic diagram of the driving device in an embodiment according to this application; Fig. 20 is a schematic diagram of the arrangement of the pushing module and the anti-reverse module in an embodiment according to this application; Fig. 21 is a schematic diagram of the first stepping detection module in an embodiment according to this application; Fig. 22 is a schematic diagram of the second stepping detection module in an embodiment according to this application; Fig. 23 is a schematic diagram of the horizontally positioned needle assistance device in an embodiment according to this application; Fig. 24 is a schematic diagram of the initial state limited by the limiting plate in an embodiment according to this application; Fig. 25 is a schematic diagram of the needle assistance device state limited by the limiting plate in an embodiment according to this application; Fig. 26 is a schematic diagram of the longitudinally positioned needle assistance device in an embodiment according to this application; Fig. 27 is a schematic diagram of the initial state limited by the limiting rod in an embodiment according to this application; Fig. 28 is a schematic diagram of the initial state limited by a limiting rod and a limitation pressing plate in an embodiment according to this application. Fig. 29 is a schematic diagram of the initial state of a limiting member and a trigger rod in an embodiment according to this application. DETAILED DESCRIPTION The technical solutions of this application will be further described in detail below with reference to the accompanying drawings and embodiments. This application provides a medicine injection device, wherein its bottom is attached to the surface of the subject to be injected (the user’s skin) through a non-woven fabric, thereby realizing intelligent medicine injection. Fig. 1 is a top view of the medicine injection device in an embodiment according to this application. As shown in Fig. 1, the medicine injection device in an embodiment according to this application particularly comprises: an external control unit (not shown in the figure), a reusable control unit 1, a passive medicine storage and pushing unit 2, and a charging unit 3 of reusable control unit. Particularly, the external control unit is the main control module of the medicine injection device. Particularly, it can be an Application (APP) installed on a mobile terminal, which facilitates user for controlling, realizes the intelligence of the medicine injection device, and improves the user experience. The reusable control unit 1 is the drive mechanism and electronic part of the medicine injection device, and it is detachably connected to the passive medicine storage and pushing unit 2, thereby being recycled to reduce the cost of the medicine injection device. As shown in Figs. 2-3, particularly the reusable control unit 1 may comprise 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 medicine storage and pushing unit 2. Particularly, the Bluetooth signals can comprise the injection volume and injection time. The first rechargeable battery 11 is electrically connected to the control module 10, and mainly provides the power required for the operation of the control module 10. As shown in Fig. 4, in order to reduce the size of the medicine injection device and facilitate installation, the reusable control unit further comprises a second housing 12. Particularly, the shape of the second housing 12 can be either a cuboid or a cube. The second housing 12 comprises a second box 121, a second cover body 122, and an accommodating area 123. Particularly, the second box 121 has a connection port 1211 and a connecting female connector 1212 on one side. The connecting female connector 1212 is located inside the connection port 1211 and is injection molded together with the second box 121, which improves waterproofness. The connecting female connector 1212 is electrically connected to the first rechargeable battery 11. The accommodating area 123 is the space enclosed by the second box 121 and the second cover 122 for accommodating the first rechargeable battery 11 and the control module 10. The second cover 122 and the second box 121 are welded together by laser, thereby protecting the control module 10 and the first rechargeable battery 11, and further improving the sealing and waterproof performance of the reusable control unit 1 by sealing it inside them. In a preferred embodiment, the reusable control unit 1 further comprises an alarm module 13, as shown in Fig. 5. The alarm module 13 is accommodated in the second box 121 and is electrically connected to the control module 10. When the control module 10 detects that the power of the first rechargeable battery 11 is lower than the preset power threshold, it generates an alarm signal and sends it to the alarm module 13, so that the alarm module 13 prompts the user to replace or recharge the first rechargeable battery 11 in time. The alarm module 13 can be implemented in various ways, including but not limited to: a ceramic sound-generating plate, or a miniature vibration motor. The passive medicine storage and pushing unit 2 is the execution module of the medicine injection device, and it is also a single-use module of the medicine injection device. As shown in Figs. 6 and 8, particularly the passive medicine storage and pushing unit 2 may comprise a medicine storage module 21, a mechanical pushing module 22, and an injection mechanism 23. The medicine storage module 21 is the storage space for medicine. In this embodiment, particularly the medicine storage module 21 is elliptical in shape, with an arc-shaped protrusion at the bottom of it (not shown in the figure); and a medicine output tube 211 and a medicine input tube 212 are provided at the top of it. The medicine output tube 211 is located on one side of the top of the medicine storage module 21, and the medicine input tube 212 is located opposite to the medicine output tube 211. In a preferred embodiment, to ensure complete medicine output without residue, a limiting structure 213 of mechanical pushing module is further provided at the top of the medicine storage module 21. In this embodiment, particularly the mechanical pushing module 22 comprises a pushing member 221 and a plunger 222. The outer diameter of the plunger 222 matches the inner diameter of the medicine storage module 21. The plunger 222 extends into the medicine storage module 21, during its forward movement the plunger 222 is limited by the limiting structure 213 of mechanical pushing module; and axial sliding is prevented by the arc-shaped protrusion at the bottom of the medicine storage module 21, thereby improving the injection accuracy. The pushing member 221 is connected to the plunger 222, and provides a driving force for the movement of the plunger 222, so that the plunger 222 squeezes the medicine in the medicine storage module 21 to enter the medicine output tube 211. In a particular embodiment, referring to Fig. 7, particularly the pushing member 221 may comprise a connecting bracket 2211, a plunger shaft 2212, a driving wire 2213, a ratchet 2214, and a swing arm 2215. The connecting bracket 2211 is a supporting structure for the pushing member 221, and also a structure electrically connected to the reusable control unit 1. One end of the plunger shaft 2212 is connected to the plunger 222, and the other end is connected to the connecting bracket 2211. The ratchet 2214 is mounted on the plunger shaft 2212 and passed through by it. The driving wire 2213 is located below the medicine storage module 21 and is connected to the connecting bracket 2211. The ratchet 2214 has a boss 22140 and a notch 22141, with the notch 22141 located opposite the boss 22140. The swing 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. Particularly, the pushing member 221 can be connected to the wire 200 through the connecting bracket 2211, and the wire 200 can be connected to the connecting female connector 1212, thereby realizing the electrical connection with the control module 10. When the reusable control unit 1 sends an electrical signal, it energizes the driving wire 2213 through the wire 200 and the connecting female connector 1212. The driving wire 2213 is heated and contracts to perform reciprocating motion, thereby driving the swing arm 2215 to reciprocate, so that the paddle 22151 drive the ratchet 2214 to rotate, thereby pushing the plunger shaft 2212 forward, and then pushing the plunger 222 to generate a squeezing force on the medicine. In a preferred embodiment, the pushing member 221 further has a trigger module 2216 of injection mechanism. The trigger module 2216 of injection mechanism is connected to the ratchet 2214. In this embodiment, particularly the trigger module 2216 of injection mechanism may comprise a locking pin 22161 and a locking pin spring 22162, and the locking pin spring 22162 is fitted around the outside of the locking pin 22161. One end of the locking pin 22161 abuts against the boss 22140 of the ratchet 2214, and the other end is connected to the injection mechanism 23. The injection mechanism 23 is connected to the medicine storage module 21 and the mechanical pushing module 22 respectively. In this embodiment, the injection mechanism 23 has a needleinsertion module 231, a medicine delivery tube 232, and a medicine injection needle 233. Particularly, the needle-insertion module 231 comprises a needle holder 2311 and a needlepushing spring 2312. The needle-pushing spring 2312 is inserted into the needle holder 2311. The medicine injection needle 233 is connected to the needle holder 2311. One end of the medicine delivery tube 232 extends into the medicine output tube 211, and the other end passes through the needle-pushing spring 2312 and is connected to the medicine injection needle 233. Before injection, the needle holder 2311 is connected to the trigger module 2216 of injection mechanism, and the locking pin 22161 abuts against the boss 22140, so that the needle holder 2311 is fixed in the energy storage position, thereby making the needle-pushing spring 2312 in an energy storage state. When the ratchet 2214 rotates, the notch 22141 of the ratchet 2214 contacts the locking pin 22161, the locking pin 22161 moves toward the ratchet 2214, the locking pin spring 22162 is released and moves away from the needle holder 2311, causing the needle holder 2311 to move forward; then the needlepushing spring 2321 is released, and the needle-pushing action is completed instantaneously. In a preferred embodiment, as shown in Fig. 9, the passive medicine storage and pushing unit 2 further comprises a first housing 24. Referring to Figs. 10-11, the first housing 24 comprises a first cover 240, a first box 241, and an accommodating area 242 of reusable control unit and an accommodating area 243 of passive medicine storage and pushing unit formed by the first box 241 and the first cover 240. The first box 241 has a fastener 2411 of reusable control unit and a connecting male connector 2412. The fastener 2411 of reusable control unit is provided in the accommodating area 242 of reusable control unit. The male connector 2412 is disposed on one side of the second box 241 of the accommodating area 242 of reusable control unit, and has a waterproof rubber ring 24121 for the connecting male connector. Referring to Fig. 12, the connecting male connector 2412 is electrically connected to the wire 200. The first cover 240 is fastened to the top of the first box 241 and sealed by laser welding, so that the passive medicine storage and pushing unit 2 has good waterproof performance. As shown in Fig. 13, the connecting male connector 2412 is inserted into the female connector 1212 through the connector 1211 to achieve electric conduction, so that the reusable control unit 1 and the passive medicine storage and pushing unit 2 can be plugged in and unplugged. Due to the waterproof rubber ring 24121 of the connecting male connector, the connection between the connecting male connector 2412 and the connecting female connector 1212 is waterproof, so that the entire medicine injection device has good waterproof performance. As shown in Fig. 14, the charging unit 3 of reusable control unit has a second rechargeable battery (not shown in the figure) and two sets of charging ports 31 of reusable control unit. The inclusion of a second rechargeable battery enables the charging unit of the reusable control unit to have its own energy storage function. The charging unit 3 of reusable control unit is disposed outside the first housing 24 and the second housing 12, and is detachably connected to the reusable control unit 1 for charging the reusable control unit 1. The two sets of charging ports 31 of reusable control unit enable the charging unit 3 of reusable control unit to charge two reusable control units 1 simultaneously. The above describes the components of the medicine injection device and the connections between them. The working principle of the medicine injection device will be described below. The connecting male connector 2412 is inserted through the connector 1211 and into the female connector 1212, so that the reusable control unit 1 and the passive medicine storage and pushing unit 2 are electrically connected; the bottom of the medicine injection device is attached to the surface of the subject to be injected by means of non-woven fabric or the like. When the control module 10 detects that the mechanical pushing module 22 is connected to it, it sends a signal of connection to the external control unit; the external control unit then issues a prompt signal for medicine fdling. When the medicine is filled to the specified dose, the control module 10 receives a signal indicating completion of the medicine filling, and then sends the signal indicating completion of the medicine filling to the external control unit. When the medicine injection device is attached to the subject, the external control unit will send a signal of needle-insertion to the control module 10. The control module 10 will control the mechanical pushing module 22 to trigger the injection mechanism 23 to perform an action of needleinsertion. Particularly, the control module 10 controls the first rechargeable battery 11 to energize the driving wire 2213 through the connecting female connector 1212 and the connecting male connector 2412. The driving wire 2213 reciprocates due to being heated, thereby driving the swing arm 2215 to reciprocate. As a result, the paddle 22151 drives the ratchet 2214 to rotate, thereby pushing the plunger shaft 2212 to move forward, and then pushing the plunger 222 to exert a squeezing force on the medicine. Then, the control module 10 feeds back the information of needle-insertion to the external control unit; the external control unit receives a signal indicating completion of the action of needle- insertion, then generates a signal of medicine injection and send it to the control module 10; the control module 10 controls the mechanical pushing module 22 to apply pressure to the medicine storage module 21, so that the medicine enters the injection mechanism 23 from the medicine storage module 21 under pressure, thereby completing the injection action. That is, when the ratchet 2214 rotates, the notch 22141 of the ratchet 2214 contacts the locking pin 22161, the locking pin 22161 moves towards the ratchet 2214, the locking pin 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 is released, thereby completing the needle-pushing action instantaneously. Fig. 15 shows the male connector of the connecting device, in which the bracket 41 is fixedly connected to the flexible flat cable 43, the fixing sleeve 42 is provided with a sealing rubber ring 421, and the fixing sleeve 42 is provided with a slot for setting the clamp 44 so as to connect tightly with the passive medicine storage and pushing unit. Alternatively, the clamp 44 can be omitted, and the connection with the passive medicine storage and pushing unit can be achieved by glue-filling, interference fit or other connection methods. Fig. 16 shows the female connector of the connecting device, in which the plug 52 and the flexible flat cable 51 are connected by PINs. The plug 52 is provided with a slot for setting the clamp 53 so as to connect tightly with the reusable control unit. Alternatively, the clamp can be omitted, and the connection with the reusable control unit can be achieved by glue-filling, interference fit or other connection methods. Fig. 17 is a schematic diagram of the passive medicine storage and pushing unit in an embodiment according to this application. As shown in Fig. 1, the passive medicine storage and pushing unit comprises a bottom plate 10', a driving device 20', and a needle assistance device 30'. The components of the system will be described below. The bottom plate 10' is used for fixing the driving device 20' and the needle assistance device 30'. The driving device 20', as shown in Figs. 18-19, particularly comprises a swing arm 201', a driving module 202', a pushing module 203', a ratchet 204', an anti-reverse module 205', an outer threaded tube 206', an inner threaded tube 210', and a pushing module (plunger 211', liquid storage tank 212'). The structure of each part of the driving device 20' will be described in detail below. The swing arm 201' is used to receive external driving force to generate rotation, thereby driving the pushing module 203'. Particularly, the swing arm 201' can be a plate-shaped structure with a screw hole in the middle. In this embodiment, the swing arm 201' is fixed on the bottom plate 10', and the bottom plate 10' is provided with corresponding limiting posts to axially limit the swing arm 201'. The driving module 202' is used to generate an external driving force to drive the swing arm to rotate. Particularly, 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 particular embodiment, the driving wire can be a metal wire, which has the property of shrinking when heated so as to generate driving force. When the driving wire is energized, it drives the swing arm 201' to rotate. Particularly, when the driving device 20' is working, it alternately energizes the two driving wires, and the wires change from a relaxed state to a contracted state, thereby generating driving force to drive the swing arm 201' to rotate. Optionally, the driving device 20' further comprises a limiting surface of swing arm, which is fixed on the bottom plate 10'. When the swing arm 201' rotates to the limiting surface of swing arm, the driving wire 202' will stop being energized. The two pushing modules 203' are used to drive the ratchet 204' to rotate. As shown in Fig. 20, particularly the pushing module 203' can be two pushing plates, which are respectively arranged at both ends of the swing arm 201'. When the swing arm 201' rotates, it will drive the pushing module 203' to rotate. The two pushing modules 203' are staggered, so that in different driving stages, there is always one pushing module 203' located at the root of the ratchet 204' teeth to push the ratchet 204' to rotate. The ratchet 204' is driven to rotate by the pushing module 203'. Particularly, multiple 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 various ways to limit the axial movement, including but not limited to disposing a rotating component at the bottom of the ratchet 204', and axially limiting the ratchet 204' by axially limiting the rotating component via bottom plate. Furthermore, a limiting surface 2041' is further provided on the outer wall of the ratchet 204', and the triggering of the needle assistance device 30' is achieved by the limiting surface. Optionally, in order to ensure the stability of the ratchet 204' during rotation, the driving device 20' further comprises two fixing plates and a fixing post for limiting the ratchet 204'. The two fixing plates are respectively arranged on both sides of the ratchet 204', and the fixing post is fixed between the two fixing plates, thereby fixing the ratchet 204' between the fixing post and the two fixing plates, and realizing the radial limitation of the ratchet 204'. The anti-reverse module 205' is fixed on the bottom plate 10' and connected to the ratchet 204'. Its function is to control the ratchet 204' to rotate in one direction. As shown in Fig. 20, particularly the anti-reverse module 205' can be two anti-reverse plates, which are staggered so that there is always one anti-reverse module 205' located at the root of the teeth of the ratchet 204', which restricts the ratchet 204' to rotate in one direction. In another approach, the anti-reverse module 205' can also employ a unidirectional bearing to achieve its function. The outer threaded tube 206' is located inside the ratchet 204'. Particularly, it can be engaged with a sliding groove and a key, so that the outer threaded tube 206' can rotate synchronously with the ratchet 204' or move axially relative to the ratchet. The outer wall of the outer threaded tube 206' is provided with threads, and threadedly connected to the threaded hole of the swing arm 201', thereby realizing the relative movement between the outer threaded tube 206' and the swing arm 201'. In other words, the outer threaded tube 206' can achieve axial displacement. The inner threaded tube 210' has an internal thread inside, and one end of it is disposed inside the outer threaded tube. Particularly, the rotation limit can be completed by a slot. When the user injects medicine into the inner threaded tube to the full amount, the inner threaded tube 210' moves towards the outer threaded tube 206' and reaches the axial limiting surface at the end, thus forming a de facto fixed connection. After the operation starts, the inner threaded tube 210' is driven to rotate and move along with the rotation as well as the axial displacement of the outer threaded tube 206'. The plunger 211' is disposed inside the liquid storage tank 212' for pressing out the liquid in the liquid storage tank 212'. One end of the plunger 211' is provided with an inner threaded rod 21 IT, which is threadedly connected to the inner wall of the inner threaded tube 210'. Thus, the inner threaded rod can be screwed out of the inner threaded tube 210', driving the plunger 211' to move axially. Preferably, a rubber sealing ring is provided at the front of the plunger 211' to achieve sealing of the liquid in the liquid storage tank 212'. The liquid storage tank 212' is fixed on the bottom plate 10' for storing liquid. It is fitted around the outside of the plunger 211' and the plunger 211' is limited in rotation. The plunger 211' can be axially displaced within the liquid storage tank 212' to realize the injection and output of liquid. It should be noted that, those skilled in the art can select the liquid stored in the liquid storage tank 212' as needed. The liquid includes, but is not limited to: insulin, glucagon, antibiotics, nutrient solutions, analgesics, morphine, anticoagulants, gene therapy medicines, cardiovascular medicines, or chemotherapy medicines. Based on the understanding of the structure of the driving device 20' in this embodiment, its working process and principle will be introduced below with reference to Figs. 17-20. The medicine dispensing process of the passive medicine storage and pushing unit in this embodiment comprises ratchet driving and retraction driving. Ratchet driving: when the driving module 202' is working, the swing arm 201' is driven to rotate along the first direction. The pushing module 203' drives the ratchet 204' and the outer threaded tube 206' to rotate along the first direction. At this time, the outer threaded tube 206' and the inner threaded tube 210' can be regarded as fixedly connected. The inner threaded tube 210' also rotates along the first direction. Since the plunger 211' is disposed inside the liquid storage tank 212', it cannot rotate. Therefore, the rotational motion of the inner threaded tube 210' is converted into the linear stepping motion of the plunger 21T. The inner threaded rod 2111' screws out, thereby driving the plunger 211' to move axially away from the outer threaded tube 206', and pressing out the liquid in the liquid storage tank 212'. At this time, the anti-reverse module 205' passes over the ratchet 204', and there is no restriction on the rotation of the ratchet 204'. Retraction driving: when the driving module 202' is working, the swing arm 201' is driven to rotate along the second direction. Since the anti-reverse module 205' abuts against the tooth surface of the ratchet 204' to prevent it from rotating, the swing arm 201' rotates relative to the outer threaded tube 206'. Due to the axial limitation of the swing arm 201' and the ratchet 204', the outer threaded tube 206' screws out, thereby driving the inner threaded tube 210', the inner threaded rod 2111', and the plunger 211' to move axially, and pressing out the liquid from the liquid storage tank 212'. At this time, the pushing module 203' slides off the surface of the ratchet 204'. Understandably, the retraction process also drives medicine infusion, with no empty strokes and low structural energy consumption. Particularly, the first direction is opposite to the second direction. The first direction can be clockwise or counterclockwise, and those skilled in the art can arrange it as needed. It should be noted that, during both the drive wheel driving and retraction driving processes, the drive wheel 205' does not move axially, thereby avoiding radial runout of the ratchet. Furthermore, the reduction in moving parts makes the structure more stable and the structure more precise. In some preferred embodiments, the driving device further comprises a second energy storage module 207', a limiting plate 208', and a telescopic sleeve 209'. Particularly, a torsion spring limiting area is provided at the top of the inner wall of the outer threaded tube 206' for placing the second energy storage module 207'. The second energy storage module 207' is disposed within the torsion spring limiting area of the outer threaded tube 206', and one end is fixed within the torsion spring limiting area. The limiting plate 208' is connected to the second energy storage module 207' for limiting the second energy storage module 207'. Particularly, the limiting plate 208' is fixed on the top surface of the outer threaded tube 206' and is engaged in the limiting groove on the top surface of the swing arm 201'. The second energy storage module 207' is limited in the torsion spring limiting area of the outer threaded tube 206' by the limiting plate 208'. It should be understood that, when the outer threaded tube 206' rotates, it will drive the limiting plate 208' to rotate. When it rotates to a certain angle, the limiting plate 208' will disengage from the limiting groove on the top surface of the swing arm 201', thereby driving the second energy storage module 207' to release and hold. The bottom end of the telescopic sleeve 209' is disposed inside the outer threaded tube 206'. Particularly, the telescopic sleeve 209' may be provided with multiple guiding posts to guide the axial displacement of the inner threaded tube 210'. One end of the inner threaded tube 210' passes through the second energy storage module 207'. The outer wall of the inner threaded tube 210' is provided with a sliding groove, which allows it to slide on the telescopic sleeve 209'. Thus, the telescopic sleeve 209' and the inner threaded tube 210' are retractable structures for saving space. The medicine dispensing process of the passive medicine storage and pushing unit in this embodiment further comprises two processes: ratchet driving and retraction driving. Ratchet driving: when the driving module 202' is working, the swing arm 201' is driven to rotate along the first direction. The pushing module 203' drives the ratchet 204', the outer threaded tube 206', and the limiting plate 208' to rotate along the first direction. At this time, the limiting plate 208' slides out of the limiting groove on the swing arm 20 T, and the second energy storage module 207' releases and holds the inner threaded tube 210'. At this time, the outer threaded tube 206', the second energy storage module 207', and the inner threaded tube 210' can be regarded as fixedly connected. The inner threaded tube 210' also rotates along the first direction. Since the plunger 211' is disposed inside the liquid storage tank 212', it cannot rotate. Therefore, the rotational motion of the inner threaded tube 210' is converted into the linear stepping motion of the plunger 211'. The inner threaded rod 2111' screws out, thereby driving the plunger 211' to move axially away from the outer threaded tube 206', and pressing out the liquid in the liquid storage tank 212'. At this time, the anti-reverse module 205' passes over the ratchet 204', and there is no restriction on the rotation of the ratchet 204'. Retraction driving: when the driving module 202' is working, the swing arm 201' is driven to rotate along the second direction. Since the anti-reverse module 205' abuts against the tooth surface of the ratchet 204' to prevent it from rotating, the swing arm 201' rotates relative to the outer threaded tube 206. Due to the axial limitation of the swing arm 201' and the ratchet 204', the outer threaded tube 206' screws out, thereby driving the torsion spring, inner threaded tube 210', inner threaded rod 2111', and plunger 211' to move axially, and thus pressing out the liquid in the liquid storage tank 212'. At this time, the pushing module 203' slides off the surface of the ratchet 204'. Understandably, the retraction process also drives medicine infusion, with no empty strokes and low structural energy consumption. To better understand the working process of the driving device 20', a particular embodiment is described below. Referring to Figs. 19-20, in this embodiment, the two driving modules 202' are the first driving wire 2021' and the second driving wire 2022', respectively; the two pushing modules 203' are the first pushing module 2031' and the second pushing module 2032', respectively, they are staggered from each other by half a tooth angle. That is, when the first pushing module 2031' is located at the root of the teeth of the ratchet 204', the second pushing module 2032' is located at the middle of the two teeth. The two anti-reverse modules 205' are the first anti-reverse module 2051' and the second anti-reverse module 2052', respectively; and like the pushing module 203', they are also staggered from each other by half a tooth angle. To ensure that each drive rotates by half a tooth, two swing arm limiting posts are provided at both ends of the swing arm 201', and they are disposed on the bottom plate, i.e., the first swing arm limiting post and the second swing arm limiting post. The rotation angle of the swing arm 201' to the limiting post is half a tooth. The swing arm 201 stops rotating when it reaches the limiting post. Particularly, a detection electric brush can be provided on the limiting post of swing arm. When the swing arm contacts the limiting post, the electrical brush is turned on, and the power supply is stopped, thereby stopping the swing arm from rotating. The operation of the driving device 20' in this embodiment will now be described below. In the first stage, the first driving wire 2021' is energized, and the swing arm 201' is driven to rotate clockwise along the front view direction. The first pushing module 2031' pushes the ratchet 204' to rotate clockwise, and the outer threaded tube 206' also rotates clockwise in the same direction, thereby driving the limiting plate 208' to rotate. When the limiting plate 208' slides out of the upper limiting groove of the swing arm 20 T, the second energy storage module 207' will release and hold the inner threaded tube 210'. At this time, the outer threaded tube 206', the torsion spring and the inner threaded tube 210' can be regarded as fixedly connected. When rotating clockwise, the inner threaded rod screws out, thereby driving the plunger 211' to move axially and complete the liquid injection. In the second stage, the second driving wire 2022' is energized, and the swing arm 201' is driven to rotate counterclockwise in the front view direction. The first anti-reverse module 2051' abuts 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 threaded tube 206'. Due to the axial limitation of the swing arm 201' and the ratchet 204', the outer threaded tube 206' screws out, thereby driving the torsion spring, inner threaded tube 210', inner threaded rod, and plunger 211' to move axially, thus completing the liquid injection. In the third stage, the first driving wire 2021' is energized, and the second pushing module 2032' pushes the ratchet 204' to rotate, thereby completing one injection. This process is similar to the first stage and will not be described in detail again. In the fourth stage, the second driving wire 2022' is energized, the second anti-reverse module 2052' is working, and one injection is completed. This process is similar to the second stage and will not be described in detail again. This cycle repeats itself, and it is understandable that the first pushing module 203' and the second pushing module 203' need to alternately work for completing the rotation of one tooth pitch of the ratchet 204'. It should be noted that, the injection volume for each injection is determined by the upward displacement generated by the plunger 211'. The upward displacement generated by the plunger 211' is related to the rotation angle of the swing arm 201', the number of teeth and rotation angle of the ratchet 204', and the thread pitch of the outer threaded tube 206', the inner threaded tube 210', and the inner threaded rod. For example, the more teeth the ratchet 204' has, the smaller the rotation angle generated each time, and the smaller and more accurate the medicine quantity 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', and the thread pitch of the outer threaded tube 206', the inner threaded tube 210', and the inner threaded rod 2111' according to the needs of each medicine dosage. In order to know the liquid volume during the injection and dispensing processes of the liquid storage tank 212', as shown in Figs. 19 and 21, the driving device 20' further comprises a first stepping detection module, which comprises a medicine quantity detecting plate 2131' and a first external electric brush 2132'. One end of the medicine quantity detecting plate 2131' is fixed to the bottom of the ratchet 204' and connected to the first external electric brush 2132', and the other end is disposed on the inner wall of the outer threaded tube 206'. When the user is not injecting medication, the tail claw of the telescopic sleeve 209' and the groove of the inner threaded tube 210' engage and fasten. The head of the telescopic sleeve 209' is located inside the outer threaded tube 206', which plays a guiding role during medication injection to prevent excessive radial runout during medication injection. At this time, the fixed medicine quantity detecting plate 2131' is not conductive and has no signal. During the injection process for the liquid storage tank 212', as the liquid in the liquid storage tank 212' increases, the plunger 211' drives the inner threaded tube 210' to move axially along the telescopic sleeve 209' towards the outer threaded tube 206'. When the liquid increases to the preset volume, the head of the telescopic sleeve 209' stops moving downward under the action of the bottom limiting plate of the outer threaded tube 206', and the corresponding tail claw disengages from the snap-fit position and moves upward relative to the inner threaded tube 210'. The medicine quantity detecting plate 2131' contacts the inner threaded tube 210', the circuit is turned on, and the system triggers the second energy storage module 207' to hold the inner threaded tube 210' according to the preset program. It should be noted that, the preset volume herein is the minimum volume required for one injection, that is, the minimum injection volume. When the user injects the maximum amount of medicine, the claw of the telescopic sleeve 209' and the inner threaded tube 210' are fully engaged. During the dispensing process, when the liquid in the liquid storage tank 212' reaches the preset volume, an alarm will be triggered to remind the user to replenish the liquid. When the liquid in the liquid storage tank 212' is lower than the preset volume, the medicine quantity detecting plate 2131' will disengage from the inner threaded tube 210', at this time the circuit will be disconnected, informing the system of the remaining amount of the medicine and prompting the user to replenish the liquid. The driving device 20' in this embodiment can also realize real-time detection of medicine injection volume. In some embodiments, the first stepping detection module further comprises a detection resistor 2133' and a detection electric brush 2134'. The detection resistor 2133' is a high-resistance resistor as a whole, fixed at the bottom of the ratchet 204', and electrically connected to the first external electric brush 2132'. The detection electric brush 2134' is disposed at the bottom of the outer threaded tube 206'. When the ratchet 204' rotates and the outer threaded tube 206' moves in stepping motion, the detection electric brush 2134' and the detection resistor 2133' form a circuit and are connected to the first external electric brush 2132'. Thus, the resistance changes each time the ratchet 204' rotates and the outer threaded tube 206 moves in stepping motion, thereby obtaining the amount of each movement, which is then converted into real-time injection volume by a chip in the system. In some embodiments, the driving device 20' may further comprise a second stepping detection module, as shown in Fig. 22. Particularly, it comprises a second external electric brush 2141' and a rotation detecting plate 2142'. The rotation detecting plate 2142' may be a metal cap with notches, having multiple notches. The notches are not uniformly arranged, and are distributed in a gradually increasing pattern or a pattern of alternating of a small and a big grid. It can also be detected when conducting reversal rotation. The rotation detecting plate 2142' is fixed to the bottom of the ratchet 204' and connected to the second external electric brush 2141'. When the rotation detecting plate 2142' rotates to the notched part, the circuit is disconnected. When it rotates to the non-notched metal part, it is connected to the second external electric brush 2141', thereby realizing rotation detection, which is then converted into real-time injection volume by a chip in this system. In summary, the driving device in this embodiment eliminates the need for motors, retarders, etc., as compared to existing technologies, thus lowering manufacturing costs; it reduces size and weight, making it easier to use and carry; due to its smaller size, it allows for more injection sites, such as the abdomen and limbs, thereby reducing the possibility of complications caused by always injecting into the same site; and it eliminates the impact of noise, making the process more comfortable, and the output more stable, direct, and reliable, which is beneficial for accurately controlling the amount of insulin injected into a patient and ensuring the patient's health. 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 guiding tube 40' or through the hard needle via the needle assistance device 30'. The needle assistance device 30' comprises a track pressing plate 30T, a soft needle slider 302', a hard needle slider 303', a two-link rod 304', a first energy storage module 305', a limiting member 306', and a trigger assembly 307'. The structure of each part of the needle assistance device 30' will be introduced below. The track pressing plate 301' is fixed on the bottom plate 10' and has a track 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 track. The soft needle slider 302' is used to fix the soft needle, and slidably mounted on the track of the track pressing plate 30T. In order to ensure that the soft needle slider 302' is fixed at the bottom of the track of the track pressing plate 301' and does not bounce back, a soft needle limiting block is provided at the bottom of the track pressing plate 301'. When the soft needle slider 302' reaches the bottom of the track pressing plate 301', the soft needle limiting block limits the soft needle slider 302' to prevent the soft needle slider 302' from resetting. The hard needle slider 303' is slidably mounted on the track of the track pressing plate 301' and connected to the other end of the second link rod 3042'. Driven by the second link 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 the liquid guiding tube or directly. The two-link rod 304' comprises a first link rod 3041' and a second link rod 3042' connected to each other. The first link rod 3041' and the second link rod 3042' are a linkage mechanism, that is, when the first link rod 3041' rotates, it will drive the second link rod 3042' to rotate. The first link rod 3041’ is connected to the hard needle slider 303’ for driving the hard needle slider 303’ to move; the second link rod 3042’ is connected to the first energy storage module 305’ through a pin shaft for driving the second link rod to rotate when the first energy storage module 305’ releases elastic potential energy, thereby driving the hard needle slider 303’ and the soft needle slider to move. Understandably, one end of the first energy storage module 305' is fixed to the bottom plate 10' and its function is to trigger the rotation of the two-link rod 304'. The limiting member 306' is fixed on the bottom plate 10' for limiting the movement of the first energy storage module 305', the hard needle slider 303' or the two-link rod 304', thereby keeping the first energy storage module 305' in a compressed energy storage state so as to store elastic potential energy. The trigger assembly 307' comprises a rotating shaft, a lifting rod 307T, and a trigger rod 3072'. The rotating shaft is fixed on the bottom plate 10', and the trigger rod 3072' and the lifting 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 bottom plate 10' and connected to one end of the lifting rod 3071'. The lifting rod 3071' is located below the limiting member 306'. It should be noted that in the initial state, the lifting rod 3071' lifts the limiting member 306'. When the trigger rod 3072' rotates, it will drive the lifting 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-link rod. Based on the understanding of the structure of the needle assistance device 30' in this embodiment, its working process and principle will be introduced below. In the initial state, the limiting face of the ratchet 204' limits the trigger rod 3072', the lifting rod 3071' lifts the limiting member 306', and the limiting member 306' limits the movement of the hard needle slider 303' or the two-link rod, thereby keeping the first energy storage module 305' in a compressed state. When the driving device 20' is working, the ratchet 204' rotates. When the trigger rod 3072' passes the limiting surface of the ratchet 204', the lifting rod 3071' is driven to rotate, and the limiting member 306' falls. The hard needle slider 303' or the two-link rod disengages from the limitation of the limiting member 306'. At this time, the first energy storage module 305' is released to drive the second link rod 3042' to rotate, thereby driving the first link 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 pressing plate 301'. The hard needle and soft needle enter the user's subcutaneous tissue to inject liquid, thus completing the needle assistance. Afterward, the soft needle slider 302' is limited to the bottom of the track pressing 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 energy storage module 305', thereby driving the hard needle to reset. The needle assistance device 30' in this embodiment provides subcutaneous needle assistance. The hard needle automatically rebounds while the soft needle remains subcutaneously, thereby reducing the risk of infection and providing excellent antibacterial and sealing properties. The soft needle is placed subcutaneously for medicine injection, resulting in less pain, allowing for easier patient movement, and eliminating concerns about needle dislodgement. Compared to insulin pens, which require at least 4 injections per day, this subcutaneous medicine infusion device can be used for at least 3 days with single needle assistance, thereby reducing the number of injections and minimizing psychological and physical trauma to a patient. It should be noted that, the above limiting member 306 can be used in various forms to limit the movement of the first energy storage module 305', the hard needle slider 303', or the two-link rod. Those skilled in the art can arrange the structure of the limiting member 306' according to practical needs. The structure and function of the limiting member 306' are described below with three embodiments. In some embodiments, as shown in Figs. 24-26, the needle assistance device 30' and the driving device 20' are arranged laterally, the limiting member can be a limiting plate 306'. The second link rod 3042' is provided with a slot that matches to the limiting plate 306'. The movement of the second link rod 3042' is limited by the cooperation between the limiting plate 306' and the slot. Particularly, in the initial state, the limiting plate 306' is lifted by the lifting rod 3071', thereby engaging with the slot of the second link rod 3042'. This limits the second link rod 3042' and then suppresses the first energy storage module 305'. When the trigger rod 3072' passes the limiting surface of the ratchet 204', the lifting rod 3071' is driven to rotate. At this time, the limiting plate 306' falls and disengages from the second link rod 3042'. The movement of the second link rod 3042' is no longer restricted, and the first energy storage module 305' is released from the limitation, thereby driving the second link rod 3042' and the first link rod 3041' to rotate. As a result, the hard needle slider 303' and the soft needle slider 302' are driven to slide, thereby completing the needle assistance process. In some embodiments, as shown in Figs. 26-27, the needle assistance device 30' and the driving device 20' are arranged longitudinally, and the limiting member can be a first limiting rod 306'. One end of the first limiting rod is fixed on the bottom plate 10' by a pin shaft and can rotate around the pin shaft. The movement of the hard needle slider 303' is limited by the first limiting rod. Particularly, in the initial state, the other end of the first limiting rod is lifted by the lifting rod 307 T, thereby abutting against the hard needle slider 303'. This limits the hard needle slider 303' and then suppresses the first energy storage module 305'. When the trigger rod 3072' passes the limiting surface of the ratchet 204', the lifting rod 3071' is driven to rotate. At this time, the first limiting rod rotates, and the hard needle slider 303' is released from the limitation of the first limiting rod. Thus, the first energy storage module 305' is released from the limitation, and the second link rod 3042' and the first link rod 3041' are driven to rotate, thereby driving the hard needle slider 303' and the soft needle slider 302 to slide, and completing the needle assistance process. In some embodiments, as shown in Fig. 28, the needle assistance device 30’ and the driving device 20’ are arranged longitudinally. The limiting member may comprise a second limiting rod 306’ and a limitation pressing plate 3061’. One end of the second limiting rod is fixed to the bottom plate 10’ by a pin shaft, and one end of the limitation pressing plate is fixed to the track pressing plate 301’. The limitation pressing plate is provided with a limiting groove for limiting the movement of the hard needle slider 303’. Particularly, in the initial state, the other end of the second limiting rod is lifted by the lifting rod 307T, thus abutting against the limitation pressing plate. At this time, the limiting groove limits the hard needle slider 303', thereby preventing it from moving. Thus, the first energy storage module 305' is pressed by limiting the hard needle slider 303'. When the trigger rod 3072' passes the limiting surface of the ratchet 204', the lifting rod 3071' is driven to rotate. At this time, the second limiting rod rotates, and the limitation pressing plate disengages from contact with the hard needle slider 303'. As a result, the first energy storage module 305' is released from the limitation, thereby driving the second link rod 3042' and the first link rod 3041' to rotate, and then driving the hard needle slider 303' and the soft needle slider 302' to slide, thus completing the needle assistance process. In some embodiments, as shown in Fig. 29, the needle assistance device 30' and the driving device 20' are arranged longitudinally, including a limiting plate 306', one end of the limiting plate is fixed on the bottom plate 10', and the trigger rod 307' is constrained on the bottom plate 10'. The limiting plate is provided with a limiting groove for limiting the movement of the hard needle slider 303'. Particularly, in the initial state, one end of the trigger rod 307' abuts 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 then the hard needle slider 303' cannot move. Thus, the first energy storage module 305' is suppressed by limiting the hard needle slider 303'. When the other end of the trigger rod passes the limiting surface of the ratchet 204' and rotates, the limiting groove disengages from contact with the hard needle slider 303'. Thus, the first energy storage module 305' is released from the limitation, thereby driving the second link rod 3042' and the first link rod 3041' to rotate, and then driving the hard needle slider 303' and the soft needle slider 302' to slide, thus completing the needle assistance process. It is understood that, when the passive medicine storage and pushing unit in this embodiment is working, the medicine is first injected into the liquid storage tank, then the driving device works to remove the air in the liquid guiding tube, and after a period of time, the needle ejection module is triggered to complete the needle assistance. After that, the driving device continues to work to complete the medicine injection through the liquid guiding tube. The passive medicine storage and pushing unit in this embodiment adopts a driving mode of cooperation between ratchet and screw, which has high degree of integration, decreases manufacturing costs and energy consumption, reduces weight, and is easy to use and carry. A detection module for medicine injection is used for providing more stable, direct, and reliable output, thereby facilitating to precisely control the amount of medicine injected into the patient. The needle assistance device assists the needle subcutaneously, the hard needle automatically rebounds, and the soft needle remains subcutaneously, thereby reducing the number of needle pricks, decreasing the risk of infection, and having good antibacterial and sealing properties. In this application, the term “multiple” means two or more, unless otherwise expressly defined. The terms “installation,” “connection,” “linking / connecting” and “fixing” should be interpreted broadly. For example, “connection” can be a fixed connection, a detachable connection, or an integral connection; “linking / connecting” can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In the description of this application, it should be understood that, the terms “upper”, “lower”, “left”, “right”, “front”, “rear”, etc., indicate the orientation or positional relationship based on the orientation or positional relationship as shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In the description of this specification, the terms “a particular embodiment”, “some embodiments”, “one embodiment”, etc., refer to specific features, structures, materials or characteristics described in connection with that embodiment or example that are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The medicine injection device in an embodiment according to this application allows the electronic and mechanical parts of the medicine injection device to be separated through the detachable connection between the reusable control unit and the passive medicine storage and pushing unit. This allows for easy plugging and unplugging, thereby enabling the electronic parts to be reused, 5 reducing environmental pollution and costs. The external control unit enables the medicine injection device to be intelligent, eliminating the need for manual needle-insertion and greatly improving the user experience. Meanwhile, the charging unit for the reusable control unit has two charging ports for reusable control units, which can charge two reusable control units at the same time. The charging unit for the reusable control unit itself further has a second rechargeable battery, which has a power 10 storage function, thereby eliminating the hassle of connecting a charging cable during use. The particular embodiments described above further illustrate the objects, technical solutions, and beneficial effects of this application. It should be understood that, the above description are only particular embodiments according to this application, and is not intended to limit the protection scope of this application. Any modifications, equivalent substitutions, improvements, etc., made within the 15 spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A medicine injection device, which comprises: a passive medicine storage and pushing unit, a reusable control unit, and a charging unit for the reusable control unit;the passive medicine storage and pushing unit comprises a medicine storage module, a mechanical pushing module, and an injection mechanism; the mechanical pushing module is connected to the medicine storage module; the injection mechanism is separately connected to the medicine storage module and the mechanical pushing module;the reusable control unit is detachably connected to the passive medicine storage and pushing unit; the reusable control unit comprises a control module and a first rechargeable battery, the first rechargeable battery is electrically connected to the control module; the reusable control unit is connected to the passive medicine storage and pushing unit to form a medicine injection unit; andthe charging unit for the reusable control unit is detachably connected to the reusable control unit, and the charging unit for the reusable control unit is used to charge the reusable control unit.

2. The medicine injection device according to claim 1, wherein the reusable control unit in the medicine injection device is connected to an external control unit, preferably the external control unit is connected to the reusable control unit wirelessly, or the reusable control unit is equipped with an interface for external connection; or the external control unit and the reusable control unit are integrated into a single structure.

3. The medicine injection device according to claim 2, wherein when the reusable control unit and the passive medicine storage and pushing unit are connected and disconnected, the external control unit is capable of connecting to the reusable control unit; and / orafter the passive medicine storage and pushing unit initially confirms the medicine capacity, the external control unit cannot continue to perform control functions if the passive medicine storage and pushing unit reconnects to the reusable control unit; and / orafter the initial connection between the reusable control unit and the external control unit, the reusable control unit cannot be connected to the external control unit in other medicine injection devices during subsequent reuse.

4. The medicine injection device according to claim 1, wherein the passive medicine storage and pushing unit further comprises a first housing; the first housing comprises a first box, a first cover, and an Accommodating area for reusable control unit and an accommodating area for passive medicine storage and pushing unit formed by the first box and the first cover; the first cover is fastenedto the top of the first box and is connected and fixed to the first box.

5. The medicine injection device according to claim 4, wherein the first box has a fixing member for reusable control unit and a connecting male or female connector; the fixing member for reusable control unit is disposed in the accommodating area for reusable control unit; the connecting male connector is connected and fixed to the first box in the accommodating area for reusable control unit.

6. The medicine injection device according to claim 1, wherein the reusable control unit further comprises a second housing; the second housing comprises a second box, a second cover, and an accommodating area formed by the second box and the second cover; the second cover and the second box are connected and fixed; the second box has a connecting female or male connector that is connected and fixed to the second box; the accommodating area is used to receive the first rechargeable battery and the control module.

7. The medicine injection device according to claim 1, wherein the reusable control unit further comprises an alarm module; the alarm module is electrically connected to the control module.

8. The medicine injection device according to claim 1, wherein the charging unit for reusable control unit has one or more sets of second rechargeable batteries and / or external power interfaces; andone or more sets of charging ports for reusable control unit.

9. A connecting device, which comprises a male connector and a female connector, the male connector comprises a bracket, a flexible flat cable, and a sealing sleeve; wherein the flexible flat cable has pin shafts at both ends, one end of the flexible flat cable is wrapped around the bracket, the sealing sleeve is fitted around the bracket and the flexible flat cable and can be connected to the female connector to achieve a waterproof sealing.

10. The connecting device according to claim 9, wherein the female connector comprises a flexible flat cable and a physical interface, wherein the flexible flat cable has pin shafts at both ends, and the pin shaft at one end is electrically connected to the pin shaft of the physical interface.

11. A medicine injection system, which comprises the medicine injection device according to any one of claims 1-8 and the connecting device according to claim 9 or 10.

12. The medicine injection system according to claim 11, wherein the male connector can be connected to or integrated with the passive medicine storage and pushing unit, and the female connector can be connected to or integrated with the reusable control unit, thereby realizing the physical and electrical connection between the passive medicine storage and pushing unit and the reusable control unit.

13. The medicine injection system according to claim 11, wherein the female connector can be connected to or integrated with the passive medicine storage and pushing unit, and the male connector can be connected to or integrated with the reusable control unit, thereby realizing the physical and electrical connection between the passive medicine storage and pushing unit and the reusable control unit.A. CLASSIFICATION OF SUBJECT MATTER A61M5 / 20(2006.01)i; H01R13 / 504(2006.01)i According to International Patent Classification (IPC) or to both national classification and IPC B. FIELDS SEARCHED Minimum documentation searched (classification system followed by classification symbols) IPC:A61M H01R Documentation searched other than minimum documentation to the extent that such documents are included in the fields searched Electronic data base consulted during the international search (name of data base and, where practicable, search terms used) CNABS, CNTXT, W, DUXIU: -&tt, M, Sg, Sit, tO, |®7K; VEN, DWPI, USTXT, WOTXT, EPTXT, IEEE: battery, power, charger, reuse, disposable, skin patch, pump, connect, seal, cable, FPC, waterproof C. DOCUMENTS CONSIDERED TO BE RELEVANT Category* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No. PX CN 116983509 A (SUZHOU HECHUN MEDICAL TECHNOLOGY CO., LTD.) 03 November 2023 (2023-11-03) description, paragraphs [0002]-[0066], and figures 1-14 1-13 PX Y CN 116865030 A (SUZHOU HECHUN MEDICAL TECHNOLOGY CO., LTD.) 10 October 2023 (2023-10-10) description, paragraphs [0002]-[0052], and figures 1-9 CN 116367874 A (LUNA HEALTH CO., LTD.) 30 June 2023 (2023-06-30) description, paragraphs [0002]-[0205], and figures 1A-11 9-10 1-8, 11-13 Y US 2014148756 Al (ROCHE DIAGNOSTICS OPERATIONS) 29 May 2014 (2014-05-29) description, paragraphs [0002]-[0163], and figures la-18b 1-8, 11-13 Y Y US 2019365987 Al (AMGEN INC.) 05 December 2019 (2019-12-05) description, paragraphs [0002]-[0144], and figures 1-33 US 2015011976 Al (PRECIFLEX SA) 08 January 2015 (2015-01-08) description, paragraphs [0002]-[0069], and figures 1-7G 1-8, 11-13 1-8, 11-13 | | Further documents are listed in the continuation of Box C. | J | See patent family annex. * Special categories of cited documents: “T” later document published after the international filing date or priority “A” document defining the general state of the art which is not considered date and not in conflict with the application but cited to understand the to be of particular- relevance principle or theory underlying the invention “D” document cited by the applicant in the international application “X” document of particular- relevance; the claimed invention cannot be “E” earlier application orpatent but published on or after the international considered novel or cannot be considered to involve an inventive step filing date when the document is taken alone “L” document which may throw doubts on priority claim(s) or which is “Y” document of particular relevance; the claimed invention cannot be cited to establish the publication date of another citation or other considered to involve an inventive step when the document is special reason (as specified) combined with one or more other such documents, such combination “O” document referring to an oral disclosure, use, exhibition or other being obvious to a person skilled in the art means document member of the same patent family “P” document published prior to the international filing date but later than the priority date claimed Date of the actual completion of the international search 27 November 2024 Date of mailing of the international search report 03 December 2024 Name and mailing address of the ISA / CN China National Intellectual Property Administration (ISA / CN) China No. 6, Xitucheng Road, Jimenqiao, Haidian District, Beijing 100088 Authorized officer Telephone No.C. DOCUMENTS CONSIDERED TO BE RELEVANTCategory* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No. X KR 101438057 Bl (YURA CORP, et al.) 05 September 2014 (2014-09-05) description, paragraphs [0002]-[0060], and figures 1-16 9-10 Y KR 101438057 Bl (YURA CORP, et al.) 05 September 2014 (2014-09-05) 11-13 description, paragraphs [0002]-[0060], and figures 1-16 A CN 218919392 U (SHENZHEN REUNION ELECTRONICS CO., LTD.) 25 April 2023 (2023-04-25) entire document 9-10 A KR 20230106049 A (EOFLOW CO., LTD.) 12 July 2023 (2023-07-12) entire document 1-13

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