A patch-type automatic injection device having a replaceable module

Abstract

The application discloses a patching type automatic injection device with replaceable modules, comprising: a disposable patching injection module, including a medicine bottle fixing part and a medicine injection mechanism, the medicine bottle fixing part is used for installing a detachable medicine bottle, and the medicine injection mechanism is used for sucking and pushing the medicine in the medicine bottle; a power control module, including a power supply and a driving motor, the driving motor is electrically connected with the power supply through a circuit control board, and the driving motor is used for driving the medicine injection mechanism. The application adopts a partial disposable design, which can effectively reduce the use cost, ensure the use safety of patients, reduce the abandonment of electronic components such as batteries and circuit boards, and is more friendly to environmental protection. The application has the automatic injection function, is convenient to use, is convenient for patients to perform self-injection at home, reduces the occupation of public medical resources, and improves the drug compliance of patients.

Description

Technical Field

[0001] This invention relates to a novel wearable drug delivery device, and more specifically, to a patch-type automated injection device with replaceable modules. Background Technology

[0002] With the advancement of technology and the increasingly fast pace of life, many patients with chronic diseases are unable to visit medical institutions for treatment on time. To avoid disrupting patients' lives and work, engineers have invented wearable medical devices. Patients wear these devices and can receive treatment without being restricted by time or location. Wearable drug delivery devices are particularly helpful for patients who need regular injections. For example, the advent of insulin pumps has greatly facilitated the lives of diabetic patients. Early insulin pumps were typically worn on the patient's body, injecting medication through an extended tubing. Users were often unable to engage in strenuous activity or experience impacts, which could easily lead to the device falling or tubing connection failures. To address this issue, engineers invented patch-type insulin pumps, such as the OmniPod patch pump developed by Insulet in the United States. This tubeless design involves attaching the pump to the skin of the patient's abdomen or upper arm. The product contains an injection needle, and a programmed mechanical structure injects the medication into the patient's body. This patch-type delivery device eliminates visible tubing during the injection process, ensuring that patient movements do not interfere with the process, making it more efficient and safer. Its compact size, simple structure, ease of operation, and privacy have made it increasingly popular among patients. However, such products currently on the market have the following drawbacks: 1. Most of them adopt a completely disposable design, but these products often contain non-disposable components such as batteries, circuit boards with chips, and motors. Disposing of them as a whole will cause a waste of resources, and the disposal of these electronic components will also cause great harm to the environment.

[0003] 2. They are often incompatible with cartridges and vials, making it impossible to meet the needs of injecting large doses of medication.

[0004] 3. Pre-filled syringes are often used to inject medication into the drug compartment of the patch-type automatic injection device. The entire operation usually requires professional personnel. At the same time, the medication is transferred through different devices. Improper operation can cause drug loss, which is not conducive to patients receiving treatment outside the hospital and results in a waste of medical resources.

[0005] 4. Although a few products can be used with cartridge bottles, they require a special mechanical structure to push the rubber stopper inside the cartridge bottle to achieve injection. The transmission structure design is complex, requiring multi-stage transmission and many parts, which makes them prone to mechanical failure. If a screw is used for coaxial propulsion, it will result in an excessively long dimension, which will compromise the privacy of wearing and using the product.

[0006] 5. Some products, in order to save costs, do not use motor drive, but rely on springs, material deformation due to heat, etc. to push the rubber stopper forward. Such a design has poor injection accuracy.

[0007] The invention patent with publication number CN110621366A discloses an intelligent wearable injection and / or infusion device. This invention is a wearable drug delivery device that is disposable after use. As mentioned above, it has the disadvantages of wasting resources and polluting the environment. Summary of the Invention

[0008] Existing patch-type automated injection devices are prone to resource waste and environmental pollution, and have poor compatibility, complex structure, and low injection accuracy. To overcome these shortcomings, this invention provides a patch-type automated injection device with replaceable modules, which reduces medical resource waste, minimizes environmental pollution, has a simple structure, is easy to use, has low cost, and high injection accuracy.

[0009] The technical solution of the present invention is: an automatic patch-type injection device with replaceable modules, comprising: The disposable patch injection module includes a medicine bottle fixing part and a medicine liquid injection mechanism. A detachable medicine bottle is installed on the medicine bottle fixing part, and the medicine liquid injection mechanism draws and pushes the medicine liquid in the medicine bottle. The power control module includes a power supply and a drive motor. The drive motor is electrically connected to the power supply through a circuit control board, and the drive motor drives the drug injection mechanism.

[0010] Disposable patch injection modules are typically sterile before use, can be applied to a patient's skin for single use, and the power control module can be reused. This design can meet the injection needs of most injectable drugs on the market without considering location, time, or training, greatly reducing the occupation of public medical resources.

[0011] This invention is designed as a partially disposable patch injection module that penetrates the body and directly contacts the medication, meeting the requirements of sterility and avoiding cross-infection and medication contamination. The power control module, containing a battery, control board, and drive motor, is designed not to come into contact with the medication or injection site, thus eliminating the need for disposal. This ensures hygiene and safety while reducing the disposal of expensive components, lowering operating costs, reducing additional expenses for patients, and minimizing waste, making it more environmentally friendly. Furthermore, this invention uses a drive motor to inject the medication into the patient's body. This driving method can effectively deliver large doses of high-viscosity medication, resulting in more precise dosage and allowing for effective control of the injection process as needed.

[0012] Preferably, the vial holder has a vial hole. It is compatible with large-capacity vials, such as cartridges and syringes, which can be directly inserted into the disposal module for use. Pharmaceutical companies do not need to change the drug-carrying packaging of their products, and there is no transfer of liquid medication from a drug-carrying platform to the patch pump during use. It is extremely simple to use, reducing the possibility of misoperation, and pharmaceutical companies do not need to change their production lines.

[0013] Preferably, the drug injection mechanism includes a drug storage chamber and a drug injection component, as well as an injection needle advance / retract assembly. The drug storage chamber is connected to the drug bottle, and an elastic injection needle is connected to the drug storage chamber. The drug injection component is used to draw the drug from the drug bottle into the drug storage chamber and to push the drug from the drug storage chamber out through the elastic injection needle. The elastic injection needle is connected to the injection needle advance / retract assembly, which is used to drive the elastic injection needle to be inserted and removed from the human body. The disposable patch injection module is equipped with a drug storage chamber, which draws the drug from the drug bottle into the drug storage chamber by suction. The drug storage chamber is a transfer space, which can make full use of the space of the drug injection mechanism itself to reasonably set the length and width ratio. In this way, when injecting the same dose of drug, the overall product is shorter in length than similar products, and the pushing distance of the drug injection component in length can also be shorter, which is more conducive to reducing the overall size of the product. It can meet the needs of large-dose drug injection while ensuring privacy.

[0014] Preferably, the medication injection assembly includes a drive screw and a plunger. The plunger is slidably embedded in the medication storage chamber, and the drive screw is connected to the drive motor via a drive nut. Through the reciprocating motion of the plunger, the medication is transferred from the vial to the medication storage chamber, and then injected into the patient's body from the storage chamber.

[0015] Preferably, the disposable patch injection module also includes a housing, within which the vial fixing part and the drug injection mechanism are housed. The injection needle advance / retreat assembly includes an advance / retreat control key and a pressure block. The pressure block is fixed to the advance / retreat control key, which is slidably connected to the housing. The elastic injection needle is also slidably connected to the housing, and the pressure block is drively connected to the elastic injection needle. The housing provides a closed space, better isolating the vial fixing part and the drug injection mechanism from the outside. Under external force, the advance / retreat control key drives the pressure block. Under the action of the pressure block with a locking structure, the pressure plate compresses the return spring and moves downward, simultaneously driving the elastic injection needle downward to pierce the patient's body.

[0016] Preferably, the disposable patch injection module also includes an adhesive base, with the housing fixed to the adhesive base and the power control module plugged into the housing. The adhesive base serves as the carrier for the vial fixing part, the drug injection mechanism, and the power control module. In use, the adhesive base is directly applied to the human body surface, and after use, the power control module is removed from the housing for recycling.

[0017] Preferably, the injection needle advance / retract assembly also includes an anti-retracting rocker arm, which is fixed to the housing. The end of the anti-retracting rocker arm has a locking hook, and the advance / retracting needle control key has an advance / retracting locking groove, in which the locking hook is embedded. The locking hook of the anti-retracting rocker arm, in conjunction with the advance / retracting locking groove, effectively prevents the elastic injection needle from retracting.

[0018] Preferably, a guide plate is provided between the medicine bottle fixing part and the medicine liquid storage chamber. A hollow puncture needle is provided on the guide plate, with the tip of the needle located at the mouth of the medicine bottle corresponding to the medicine bottle fixing part. The other end of the puncture needle is connected to the medicine liquid storage chamber. After the medicine bottle is inserted into the medicine bottle fixing part, the puncture needle on the guide plate pierces into the medicine bottle, connecting the medicine bottle to the outside and ensuring that the medicine liquid can subsequently flow to the medicine liquid storage chamber through the puncture needle.

[0019] Preferably, the puncture needle and the drug storage chamber are connected via a drug transfer line. The drug transfer line ensures that the drug vial and the drug storage chamber are connected.

[0020] Preferably, the medicine storage chamber is equipped with an inlet check valve, and the medicine transfer pipeline is connected to the inlet check valve. The inlet check valve has two elastic inlet valve plates, which form a V-shaped medicine inlet. When the medicine flows outward from the V-shaped opening, the pressure of the medicine on the inner side of the elastic inlet valve plates creates a lateral force that pushes the two elastic inlet valve plates to expand outward; conversely, when the medicine flows inward from the outside into the V-shaped opening, the pressure of the medicine on the outer side of the elastic inlet valve plates creates a lateral force that pushes the two elastic inlet valve plates to close, thereby generating a unidirectional flow effect and ensuring that the medicine flows into the medicine storage chamber in one direction only.

[0021] Preferably, the drug storage chamber is equipped with an outlet check valve, and a flexible injection needle is connected to the outlet check valve. The outlet check valve has two flexible outlet valve plates, which form a V-shaped drug outlet. The outlet check valve ensures that the drug flows out of the drug storage chamber in one direction only.

[0022] Preferably, the output end of the drive motor is equipped with a drive head, and the transmission nut has a groove. The drive head has symmetrical and oppositely oriented bevels, and the groove has an opening with an arc surface. The drive head is inserted into the groove. This design allows the injection plunger to quickly couple with the drive head of the drive motor. Regardless of whether the drive head and groove are perfectly aligned, relative rotation and self-alignment can be achieved during the insertion of the drive head. When connecting the disposable patch injection module to the power control module, it allows for convenient and quick connection, and automatically aligns and inserts into the groove regardless of the direction of the drive head's rotation.

[0023] Preferably, the power control module also includes a housing and a control panel, with the control panel mounted on the housing and the power supply and drive motor located inside the housing. The housing properly encloses the power supply and drive motor to ensure repeated use.

[0024] Preferably, the medicine bottle fixing part is provided with an observation window. The observation window allows the user to observe the injection of the medicine.

[0025] Preferably, the power control module also includes a communication module and an RFID module. The communication module is electrically connected to the RFID module, which is used to read the electronic tag on the outer wall of the medicine bottle. When the disposable patch injection module is connected to the power control module, the RFID module can read the drug information, and then the communication module transmits the relevant information to the medication management APP to record the drug usage. This facilitates the recording and analysis of patient medication data. Professional medical staff can remotely guide patients on medication use based on the medication information, and the APP can remind patients to take their medication, reducing the occupation of public medical resources and thus achieving the best treatment effect.

[0026] The beneficial effects of this invention are: Adopting a partially disposable design can effectively reduce usage costs while ensuring patient safety, reducing the disposal of electronic components such as batteries and circuit boards, and is more environmentally friendly.

[0027] It features an automatic injection function, is easy to use, allows patients to self-inject at home, reduces the burden on public medical resources, and improves patient medication adherence.

[0028] Driven by a motor and controlled by software, the injection of medication can be made more precise. It can be adapted to different dosages and viscosities of medication and can be injected within the prescribed time to achieve the best therapeutic effect.

[0029] It is compatible with both cartridges and vials, enabling the injection of larger doses of medication, and is applicable to a wider range of drugs and primary packaging.

[0030] Equipped with communication and radio frequency identification modules, it facilitates the recording and analysis of patient medication data, as well as remote guidance of patients by professional medical staff, reducing the occupation of public medical resources and thus achieving the best treatment results.

[0031] With its wearable design, the medication process offers excellent privacy and will not affect the user's daily life or work.

[0032] The human factors design ensures easy installation and simple use, which can greatly enhance patients' confidence in using it. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the disassembled structure of the present invention; Figure 3 This is a schematic diagram of the disposable patch injection module in this invention; Figure 4 This is a schematic diagram of the internal structure of the disposable patch injection module in this invention; Figure 5 This is a longitudinal sectional view of the present invention; Figure 6 This is a cross-sectional view of the present invention; Figure 7 This is a schematic diagram showing the state of the skin during the injection of the present invention; Figure 8a This is a schematic diagram of the state of the injection needle advance and retraction component when the elastic injection needle is not ejected in this invention; Figure 8b This is a schematic diagram showing the state of the injection needle advance and retraction component when the elastic injection needle is ejected in this invention; Figure 8c for Figure 8b Sectional view at point AA; Figure 8d This is a schematic diagram of the advancing and retreating locking groove in this invention; Figure 8e This is a schematic diagram showing the position of the anti-retraction rocker arm in the forward / reverse locking groove when the elastic injection needle has not been ejected in this invention; Figure 8f This is a schematic diagram showing the position of the anti-retraction rocker arm in the forward / reverse locking groove when the elastic injection needle is ejected in this invention; Figure 9 This is a schematic diagram showing the flow of the medicine when it is drawn into the medicine storage chamber during the use of this invention; Figure 10 This is a schematic diagram showing the flow of the medicine when it is pushed out of the medicine storage chamber during the use of this invention; Figure 11 This is a schematic diagram of the inlet check valve and outlet check valve in this invention; Figure 12 This is a schematic diagram illustrating the working principle of the inlet check valve and the outlet check valve in this invention. Figure 13 This is a schematic diagram of the coupling structure between the drive motor and the transmission nut in this invention; Figure 14 This is a schematic diagram of the power control module in this invention; Figure 15 This is a schematic diagram of the transmission screw in this invention.

[0034] In the diagram, 1-Disposable patch injection module, 100-Housing, 101-Adhesive patch substrate, 102-Observation window, 103-Vessel opening, 104-Guide plate, 1041-Bayonet, 1042-Puncture needle, 10421-Inner hole, 105-Drug transfer tubing, 106-Drug storage chamber, 1061-Inlet check valve, 1062-Outlet check valve, 107-Drug injection assembly, 1071-Drive nut, 10711-Groove, 1072-Drive screw, 10721-Reciprocating thread, 1073-Push plug, 1074-Sealing ring, 108-Injection needle advance / retreat assembly, 1081-Injection needle advance / retreat control key, 1082-Pressure... Block, 1083-First spring, 1084-Pressing needle plate, 1085-Second spring, 1086-Forward and backward locking groove, 1086a-Forward sliding area, 1086b-Reset sliding area, 1086c-Forward locking sliding area, 1086d-First block, 1086e-Second block, 1087-Anti-reverse rocker arm, 109-Elastic injection needle, 2-Power control module, 200-Outer shell, 201-Control panel, 202-Drive motor, 2021-Drive head, 2022-Bottom block, 2023-Wedge block, 203-Circuit control board, 204-Power supply, 3-Medicine bottle, 301-Protective diaphragm, 302-Medicine solution, 4-Human body. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] Example 1: like Figures 1 to 14As shown, a disposable patch-type automatic injection device with replaceable modules includes a disposable patch injection module 1 and a power control module 2. The disposable patch injection module 1 includes an adhesive base 101, a housing 100, a vial fixing part, and a liquid injection mechanism. The housing 100 is fixed to the adhesive base 101, the vial fixing part and the liquid injection mechanism are disposed within the housing 100, and the power control module 2 is adhered to the adhesive base 101. The vial fixing part has a vial hole 103 for inserting a detachable vial 3. The liquid injection mechanism is located beside the vial fixing part for drawing and dispensing the liquid from the vial 3. The power control module 2 includes a housing 200, a control panel 201, a power supply 204, a circuit control board 203, and a drive motor 202. The control panel 201 is mounted on the housing 200. The power supply 204 is a rechargeable power supply. The power supply 204, the circuit control board 203, and the drive motor 202 are located inside the housing 200. The drive motor 202 is electrically connected to the power supply 204 through the circuit control board 203. The drive motor 202 is used to drive the drug injection mechanism. The circuit control board integrates numerous electronic components, modules, and circuits, and is used to transmit electrical signals and execute set programs. The housing 100 has a docking hole and a housing bayonet. The docking hole is a channel for docking with the output end of the drive motor 202, and the housing 200 has elastic clips corresponding to the positions of the housing bayonet. The drug injection mechanism includes a drug storage chamber 106 and a drug injection assembly 107, as well as an injection needle advance and retraction assembly 108. The drug storage chamber 106 is connected to the drug bottle 3, and an elastic injection needle 109 is connected to the drug storage chamber 106. The drug injection assembly 107 is used to draw the drug from the drug bottle 3 into the drug storage chamber 106 and to push the drug from the drug storage chamber 106 out through the elastic injection needle 109. The elastic injection needle 109 is connected to the injection needle advance and retraction assembly 108, which is used to drive the elastic injection needle 109 to be inserted and removed from the human body. The injection needle advance and retreat assembly 108 includes an advance and retreat needle control key 1081, a pressure block 1082, and a pressure plate 1084. The advance and retreat needle control key 1081, the pressure plate 1084, and the elastic injection needle 109 are all slidably connected to the housing 100. The advance and retreat needle control key 1081 and the pressure block 1082 are integrally formed. A first spring 1083 is provided between the advance and retreat needle control key 1081 and the housing 100. The pressure block 1082 has an inclined surface that abuts against the pressure plate 1084. A second spring 1085 is provided between the pressure plate 1084 and the elastic injection needle 109. An anti-reverse rocker arm 1087 is connected between the forward / reverse needle control key 1081 and the housing 100. The anti-reverse rocker arm 1087 is inverted U-shaped. The rear end of the anti-reverse rocker arm 1087 is fixed to the housing 100. The front end of the anti-reverse rocker arm 1087 is a free end, which is a locking hook. The forward / reverse needle control key 1081 is provided with a forward / reverse locking groove 1086, and the locking hook is embedded in the forward / reverse locking groove 1086.By pushing the control key 1081 forward, the entire injection needle advance / retreat assembly 108 moves forward, compressing the first spring 1083. The lower inclined surface of the pressure block 1082 flips over the upper sliding surface of the pressure plate 1084, causing the pressure plate 1084 to move downward, compressing the second spring 1085, thereby causing the elastic injection needle 109 to pierce the skin downward. The advance / retreat locking groove 1086 has a height difference structure design, which, together with the anti-retreat rocker arm 1087, can effectively prevent the elastic injection needle 109 from retracting. The advance / retreat locking groove 1086 is an arrow-shaped annular groove with a front V-shaped angle and a rear V-shaped angle. According to the height difference, the advance / retreat locking groove 1086 can be mainly divided into a forward sliding area 1086a, a reset sliding area 1086b, and a forward locking sliding area 1086c. The beginning of the forward sliding area 1086a and the end of the reset sliding area 1086b meet at the front V-shaped angle. The forward locking sliding area 1086c connects to the end of the forward sliding area 1086a, forming a corner at the connection point. The end of the forward locking sliding area 1086c then connects to the reset sliding area 1086b, thus forming a closed loop with the forward sliding area 1086a, the reset sliding area 1086b, and the forward locking sliding area 1086c. The reset sliding area 1086b itself has a corner, which is symmetrical about the midline of the forward locking sliding area 1086c and the end of the forward sliding area 1086a. At the junction of the forward sliding area 1086a and the reset sliding area 1086b, the reset sliding area 1086b is higher than the forward sliding area 1086a, forming the first stop 1086d. When the flexible injection needle 109 has not penetrated the skin, the locking hook of the anti-retraction rocker arm 1087 is located at the intersection of the forward sliding area 1086a and the reset sliding area 1086b. The locking hook is in a stable state due to the limitation of the front V-shaped angle on both sides. Pushing the needle advance / retreat control key 1081 forward will move the entire injection needle advance / retreat assembly 108 forward. At this time, due to the action of the first stop 1086d, the anti-retraction rocker arm 1087 can only slide between the forward sliding area 1086a and the forward locking sliding area 1086c. When the flexible injection needle 109 penetrates... When the depth is set, the anti-retraction rocker arm 1087 slides into the intersection of the reset sliding area 1086b and the forward locking sliding area 1086c, that is, within the rear V-angle. At the junction of the reset sliding area 1086b and the forward locking sliding area 1086c, the forward locking sliding area 1086c is higher than the reset sliding area 1086b, forming a second block 1086e. Due to the locking effect of the rear V-angle and the blocking effect of the second block 1086e, even the reset action of the first spring 1083 cannot cause the entire injection needle advance and retreat assembly 108 to retreat.After the patient finishes injection, the needle advance / retraction control key 1081 is pushed forward again. The locking hook of the anti-retraction rocker arm 1087 begins to slide from the reset sliding area 1086b to the forward sliding area 1086a. At this time, under the action of the first spring 1083, the entire injection needle advance / retraction assembly 108 retracts, and the pressure block 1082 no longer presses against the pressure plate 1084. Under the reset force of the second spring 1085, the pressure plate 1084 drives the elastic injection needle 109 to reset, and the needle tip retracts into the disposable patch injection module 1 to prevent accidental puncture. A guide plate 104 is provided between the medicine bottle fixing part and the medicine liquid temporary storage chamber 106. The guide plate 104 is provided with a buckle 1041 and a hollow puncture needle 1042. The tip of the puncture needle 1042 is located at the mouth of the medicine bottle 3 corresponding to the medicine bottle fixing part, and the other end of the puncture needle 1042 is connected to the medicine liquid temporary storage chamber 106. The puncture needle 1042 is connected to the drug storage chamber 106 via a drug transfer line 105. An inlet check valve 1061 is connected to the drug storage chamber 106, and the drug transfer line 105 is connected to the inlet check valve 1061. The inlet check valve 1061 has two elastic inlet valve plates, which together form a V-shaped drug inlet. The drug injection assembly 107 includes a drive screw 1072 and a push plug 1073. The push plug 1073 is slidably embedded in the drug storage chamber 106, and a sealing ring 1074 is provided on the rear end face of the push plug 1073. The drive screw 1072 is connected to the drive motor 202 via a drive nut 1071. An outlet check valve 1062 is connected to the drug storage chamber 106, and an elastic injection needle 109 is connected to the outlet check valve 1062. The outlet check valve 1062 has two elastic outlet valve plates, which together form a V-shaped drug outlet. The output end of the drive motor 202 is equipped with a drive head 2021, which extends out of the outer casing 200. A groove 10711 is provided on the transmission nut 1071. The drive head 2021 includes a base block 2022 and a wedge block 2023, which are integrally formed. The wedge block 2023 has symmetrical and oppositely oriented inclined surfaces. A stepped structure exists between the base block 2022 and the wedge block 2023. The end faces of the transmission nuts 1071 on both sides of the groove 10711 are funnel-shaped curved surfaces. The disposable patch injection module 1 is a single-use item, while the power control module 2 can be reused and combined with a newer disposable patch injection module 1 to form a new automatic patch injection device.When the disposable patch injection module 1 is combined with the power control module 2, the drive head 2021 is aligned with the docking hole and inserted into the housing 100. The cutting side of the wedge block 2023 faces the groove 10711, pushing the drive head 2021 closer to the transmission nut 1071. Under the guidance of the funnel-shaped curved surface of the transmission nut 1071, the wedge block 2023 gradually enters the insertion groove 10711. At the same time, the elastic clip gradually approaches the housing slot. When the elastic clip is about to enter the housing slot, the relative position of the elastic clip and the housing slot is slightly adjusted to ensure that the two are aligned and engaged. After the elastic clip enters the housing slot as a whole, it generates a moderate engagement force. At this time, the wedge block 2023 is inserted into the groove 10711. The stepped surface between the bottom block 2022 and the wedge block 2023 also abuts against the circumferential surface of the transmission nut 1071. The power control module 2 and the disposable patch injection module 1 are then in place. When separating the power control module 2 from the disposable patch injection module 1, the power control module 2 can be pulled outwards slightly and deflected moderately, causing the elastic clip and the housing latch to disengage, thus separating the power control module 2 from the disposable patch injection module 1. An observation window 102 is provided on the medicine bottle fixing part. The power control module 2 also contains a communication module and a radio frequency identification (RFID) module. The communication module and the RFID module are electrically connected, and the RFID module is used to read the electronic tag on the outer wall of the medicine bottle.

[0037] The operation of this patch-type automatic injection device is as follows: Insert the medicine bottle 3 containing the liquid medicine into the medicine bottle hole 103 of the medicine bottle fixing part. The head of the medicine bottle 3 is engaged in the buckle 1041, effectively fixing the medicine bottle 3. The puncture needle 1042 on the guide plate 104 punctures the protective diaphragm 301 at the head of the medicine bottle 3. Insert the drive head 2021 into the groove 10711, establishing a connection between the power control module 2 and the disposable patch injection module 1. Disinfect the selected patient injection site. Peel off the protective film on the adhesive base 101 and attach the adhesive base 101 to the injection site on the patient's skin. Press the start button on the control panel 201 to start the injection. The drive motor 202 drives the transmission nut 1071 to rotate, and the transmission screw 1072... The push stopper 1073 is pushed back, at which point the inlet one-way valve 1061 opens, and the liquid medicine 302 flows from the medicine bottle 3 through the inner hole 10421 of the puncture needle 1042 into the liquid medicine transfer tube 105, and then into the liquid medicine storage chamber 106; at the same time, the patient pushes the needle advance / retract control key 1081 by hand, and the needle advance / retract control key 1081 carries the pressure block 1082 forward. During this process, the locking hook of the anti-retract rocker arm 1087 slides from the beginning to the end of the forward sliding area 1086a. At the same time, under the pressure of the inclined surface of the pressure block 1082, the needle plate 1084 compresses the second spring 1085 and moves downward, while driving the elastic injection needle 109 to move downward and pierce into the patient's body 4; the needle advance / retract control key 1081 When pushed to the end, the locking hook of the anti-reverse rocker arm 1087 passes the corner at the junction of the forward locking sliding area 1086c and the forward sliding area 1086a. At this point, releasing the hand causes the forward / reverse needle control key 1081 to retract slightly under the action of the first spring 1083. The locking hook of the anti-reverse rocker arm 1087 enters the forward locking sliding area 1086c and engages in the rear V-shaped angle. The forward / reverse needle control key 1081 remains near the end of the forward path and cannot be reset. When the liquid medicine 302 is drawn into the liquid medicine storage chamber 106 to reach the set value, the drive motor 202 adjusts its direction, driving the push plug 1073 forward via the transmission screw 1072. The outlet check valve 1062, connected to the elastic injection needle 109, opens, and the liquid medicine 302 is pushed forward by the push plug 1073. The injection is administered into the patient's body using the flexible injection needle 109. At this time, the inlet one-way valve 1061 is closed, and the liquid medicine 302 will not flow back into the medicine bottle 3 through the liquid medicine transfer tube 105. After the injection is completed, push the needle advance / retract control key 1081 again. The locking hook of the anti-retract rocker arm 1087 moves out of the rear V-shaped angle and slides along the reset sliding area 1086b. The reset sliding area 1086b is stopped at its own corner. When the key is released again, the needle advance / retract control key 1081 is reset under the action of the first spring 1083. The locking hook of the anti-retract rocker arm 1087 slides in the reset sliding area 1086b until it returns to the front V-shaped angle. Remove the entire patch-type automatic injection device from the human body. Disassemble the disposable patch injection module 1 and the power control module 2.Discard the disposable patch injection module 1, and properly store the power control module 2 for future use in combination with a new disposable patch injection module 1.

[0038] Example 2: like Figure 15 As shown, the transmission screw 1072 adopts a reciprocating thread 10721, and the drive motor 202 always maintains the same direction of rotation, which can also realize the reciprocating motion of the push plug 1073, completing the intake of the liquid medicine 302 in the liquid medicine storage chamber 106 and the injection into the human body. The rest is the same as in Example 1.

Claims

1. An automatic patch-type injection device with replaceable modules, characterized in that, include: Disposable patch injection module (1) includes a medicine bottle fixing part and a medicine injection mechanism. A detachable medicine bottle (3) is installed on the medicine bottle fixing part, and the medicine injection mechanism draws and pushes the medicine in the medicine bottle (3). The power control module (2) includes a power supply (204) and a drive motor (202). The drive motor (202) and the power supply (204) are electrically connected through a circuit control board (203). The drive motor (202) drives the drug injection mechanism.

2. The patch-type automatic injection device with replaceable modules according to claim 1, characterized in that, The medicine bottle fixing part is provided with a medicine bottle hole (103).

3. The patch-type automatic injection device with replaceable modules according to claim 1, characterized in that, The drug injection mechanism includes a drug storage chamber (106) and a drug injection assembly (107), and also includes an injection needle advance and retraction assembly (108). The drug storage chamber (106) is connected to the drug bottle (3). An elastic injection needle (109) is connected to the drug storage chamber (106). The drug injection assembly (107) is used to draw the drug from the drug bottle (3) into the drug storage chamber (106) and push the drug from the drug storage chamber (106) out through the elastic injection needle (109). The elastic injection needle (109) is connected to the injection needle advance and retraction assembly (108). The injection needle advance and retraction assembly (108) is used to drive the elastic injection needle (109) to be inserted and removed from the human body.

4. The patch-type automatic injection device with replaceable modules according to claim 3, characterized in that, The drug injection assembly (107) includes a drive screw (1072) and a pusher (1073). The pusher (1073) is slidably embedded in the drug storage chamber (106). The drive screw (1072) is connected to the drive motor (202) via a drive nut (1071).

5. The patch-type automatic injection device with replaceable modules according to claim 3, characterized in that, The disposable patch injection module (1) also includes a housing (100), the medicine bottle fixing part and the medicine injection mechanism are located inside the housing (100), the injection needle advance and retreat assembly (108) includes an advance and retreat needle control key (1081) and a pressure block (1082), the pressure block (1082) is fixed on the advance and retreat needle control key (1081), the advance and retreat needle control key (1081) is slidably connected to the housing (100), the elastic injection needle (109) is slidably connected to the housing (100), and the pressure block (1082) is drively connected to the elastic injection needle (109).

6. The patch-type automatic injection device with replaceable modules according to claim 5, characterized in that, The disposable patch injection module (1) also includes an adhesive base (101), a housing (100) fixed on the adhesive base (101), and a power control module (2) plugged into the housing (100).

7. The patch-type automatic injection device with replaceable modules according to claim 5, characterized in that, The injection needle advance and retreat assembly (108) also includes an anti-retreat rocker arm (1087), which is fixed on the housing (100). The end of the anti-retreat rocker arm (1087) is provided with a locking hook. The advance and retreat needle control key (1081) is provided with an advance and retreat locking groove (1086), and the locking hook is embedded in the advance and retreat locking groove (1086).

8. The patch-type automatic injection device with replaceable modules according to claim 3, characterized in that, A guide plate (104) is provided between the medicine bottle fixing part and the medicine liquid storage chamber (106). A hollow puncture needle (1042) is provided on the guide plate (104). The tip of the puncture needle (1042) is located at the mouth of the medicine bottle (3) corresponding to the medicine bottle fixing part. The other end of the puncture needle (1042) is connected to the medicine liquid storage chamber (106).

9. The patch-type automatic injection device with replaceable modules according to claim 8, characterized in that, The puncture needle (1042) and the drug storage chamber (106) are connected by a drug transfer pipeline (105).

10. The patch-type automatic injection device with a replaceable module according to claim 8, characterized in that, The medicine storage chamber (106) is connected to an inlet check valve (1061), and the medicine transfer pipeline (105) is connected to the inlet check valve (1061).

11. The patch-type automatic injection device with replaceable modules according to claim 3, characterized in that, The drug storage chamber (106) is connected to an outlet check valve (1062), and the elastic injection needle (109) is connected to the outlet check valve (1062).

12. The patch-type automatic injection device with replaceable modules according to claim 4, characterized in that, The output end of the drive motor (202) is provided with a drive head (2021), and the transmission nut (1071) is provided with a groove (10711). The drive head (2021) is provided with symmetrical and oppositely oriented inclined surfaces. The groove (10711) has an opening with an arc surface. The drive head (2021) is inserted into the groove (10711).

13. The patch-type automatic injection device with a replaceable module according to any one of claims 1 to 12, characterized in that, The power control module (2) also includes a housing (200) and a control panel (201). The control panel (201) is located on the housing (200), and the power supply (204) and the drive motor (202) are both located inside the housing (200).

14. The patch-type automatic injection device with a replaceable module according to any one of claims 1 to 12, characterized in that, The medicine bottle fixing part is provided with an observation window (102).

15. The patch-type automatic injection device with a replaceable module according to any one of claims 1 to 12, characterized in that, The power control module (2) is also equipped with a communication module and a radio frequency identification module. The communication module is electrically connected to the radio frequency identification module, and the radio frequency identification module is used to read the electronic tag on the outer wall of the medicine bottle.

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