Pen type injector, control system and automatic injection control method

Abstract

The invention belongs to the technical field of injectors, and particularly relates to a pen type injector, a control system and an automatic injection control method.The pen type injector comprises a medicine bin and a main machine, and one end of the medicine bin is detachably connected with one end of the main machine; the medicine bin is provided with an awakening structure and a needle hiding linkage mechanism, and the host is automatically switched from a dormant state to a standby state through the awakening structure; the automatic driving assembly in the main machine moves towards the medicine bin through the needle hiding linkage mechanism, and a piston of a medicine bottle in the medicine bin is pushed to advance, so that automatic liquid medicine injection is completed. According to the method, the host can be automatically awakened, injection can be automatically triggered, key operation is not needed, the situation that keys are mistakenly touched or triggering fails is avoided, and the use safety and convenience of equipment are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of syringes, and particularly relates to a pen-type syringe, a control system, and an automatic injection control method. Background Art

[0002] A disposable pre-filled syringe is a pre-filled injection device, mainly used in scenarios of long-term or frequent drug injection. It is a relatively common product with a large user market in the field of self-administration systems. A disposable pre-filled syringe usually includes: a manual syringe, a mechanical pen-type syringe driven by a spring, and an electronic pen-type syringe driven by a motor.

[0003] Among them, a manual syringe generally completes injection by holding the syringe by hand and pushing the push rod. The injection speed is non-linear and controlled by the injector, and the safety and convenience are poor.

[0004] The mechanical pen-type syringe is driven by a spring and completes a one-time injection. After each injection, the entire mechanical injection pen is discarded as a consumable, resulting in a large cost waste. Moreover, the spring drive has inconsistent driving forces, generally showing a large injection force in the first half and a small injection force in the second half, and the injection speed is fast and non-adjustable, which also has great defects.

[0005] The electronic pen-type syringe driven by a motor can solve the above problems existing in the manual syringe and the mechanical pen-type syringe. The main body of the electronic pen-type syringe is separated from the medicine cartridge. The medicine cartridge is discarded after one-time use as a consumable, with the lowest cost. Moreover, stable speed, adjustable speed, automatic trigger injection can be achieved through motor drive, and the main body can be reused as a device, which is a better solution in the field of syringes.

[0006] However, when using the existing electronic pen-type syringe on the market, it is necessary to press a key to trigger the power-on and the injection process. On the one hand, the key operation is prone to accidental touch, resulting in misoperation; on the other hand, after the syringe main body is used for a period of time, the sensitivity of the key decreases, which is likely to cause the key to fail to trigger or malfunction, thereby affecting the use of the syringe. Summary of the Invention

[0007] In order to solve the technical problem that the existing electronic pen-type syringe is prone to misoperation or malfunction when using key operation, the present invention provides a pen-type syringe, a control system, and an automatic injection control method.

[0008] To achieve the above object, the technical solution of the present invention is as follows: In the first aspect, the present invention provides a pen-type syringe, including a medicine cartridge and a main body. One end of the medicine cartridge is detachably connected to one end of the main body; The medicine storage bin is provided with a wake-up structure, and the main body has a wake-up trigger switch. The wake-up structure is configured such that when the medicine storage bin is connected to the main body, the wake-up structure can trigger the power switch of the main body to make the main body enter a standby working state; The medicine storage bin is further provided with a hidden needle linkage mechanism, and the hidden needle linkage mechanism includes a hidden needle sleeve; an injection trigger switch and an automatic driving component are arranged inside the main body; the hidden needle linkage mechanism is configured such that when the main body is in a standby working state and one end of the hidden needle sleeve is stressed, the hidden needle linkage mechanism will move towards the main body, trigger the injection trigger switch, and make the automatic driving component move towards the medicine storage bin to push the piston of the medicine bottle inside the medicine storage bin forward to complete the injection of the liquid medicine.

[0009] Furthermore, the hidden needle linkage mechanism is configured such that when the injection of the liquid medicine is completed and the needle is pulled out, the needle is hidden and restricted inside the medicine storage bin.

[0010] More specifically, the wake-up structure is a wake-up lever, and the wake-up lever is arranged at one end where the medicine storage bin is connected to the main body. When the medicine storage bin is installed on the main body, the wake-up lever can trigger the wake-up trigger switch.

[0011] More specifically, an automatic injection ejector rod is arranged on one side of the hidden needle sleeve. When the main body is in a standby working state and one end of the hidden needle sleeve is stressed, the hidden needle linkage mechanism will move towards the main body; the automatic injection ejector rod triggers the injection trigger switch, and makes the automatic driving component move towards the medicine storage bin to push the piston of the medicine bottle inside the medicine storage bin forward to complete the injection of the liquid medicine.

[0012] More specifically, the medicine storage bin further includes a medicine storage bin housing, and a driving sliding pin is arranged inside the medicine storage bin housing. A sliding groove is arranged on the side wall of the hidden needle sleeve, and the driving sliding pin can be embedded into the sliding groove.

[0013] More specifically, the medicine storage bin further includes a medicine storage bin housing, a locking sleeve, a medicine bottle support, and a locking sleeve ejector rod. A driving sliding pin is arranged inside the medicine storage bin housing. A sliding groove is arranged on the side wall of the hidden needle sleeve, and the driving sliding pin can be embedded into the sliding groove; The hidden needle sleeve is arranged inside the medicine storage bin housing, and the hidden needle sleeve extends out of the medicine storage bin housing below; the locking sleeve is arranged above the hidden needle sleeve, and the medicine bottle support is arranged inside the locking sleeve. The medicine bottle support is used for arranging a pre-filled sealed medicine bottle; the bottom of the locking sleeve and the upper part of the hidden needle sleeve are mutually embedded, and the locking sleeve ejector rod is arranged above the medicine bottle support; Furthermore, before injection, the locking sleeve and the hidden needle sleeve can move freely, so that the hidden needle inside the pre-filled sealed medicine bottle can be exposed or hidden; After the injection is completed, the locking sleeve ejector can lock the locking sleeve, so that the hidden needle inside the pre-filled syringe vial cannot be exposed.

[0014] Furthermore, the lower surface of the locking sleeve is provided with circumferentially evenly distributed helical teeth, the upper surface of the hidden needle sleeve is provided with a sliding limit surface that cooperates with the helical teeth, the sliding limit surface has a high point and a low point, and the connecting surface between the high point and the low point is an inclined surface; a spring is also sleeved outside the locking sleeve. Under the action of the spring, the helical teeth can rotate as the hidden needle sleeve moves axially, and the tip position of the helical teeth switches between the high point and the low point; A number of locking bars are provided on the locking sleeve. In the initial state, one of the locking bars corresponds to the locking sleeve ejector up and down; and the width of the locking sleeve ejector is smaller than the distance between adjacent locking bars; After the injection is completed; set the distance between the lower surface of the locking sleeve ejector and the upper surface of one of the locking bars to be , and the distance between the hidden needle inside the pre-filled syringe vial and the lower surface of the hidden needle sleeve is , and the tip height of the helical teeth is , then < , < ; The number of the locking sleeve ejectors is 2, and the two locking sleeve ejectors are respectively arranged on both sides above the vial bracket; A receiving groove is provided on the upper side wall of the vial bracket, and the locking sleeve ejector is arranged in the receiving groove; A push rod inclined pin insertion hole is provided above the vial bracket, and the push rod inclined pin insertion hole corresponds to the position of the locking sleeve ejector in the axial direction; A downward groove is provided on the upper surface of the locking sleeve ejector, and the inner wall outside the groove is an inclined surface. The automatic driving assembly has a push rod inclined pin, and the push rod inclined pin is inserted into the groove after passing through the push rod inclined pin insertion hole.

[0015] Furthermore, the locking sleeve includes a first ring below and a second ring above. A number of locking bars are provided on the second ring. The outer diameter of the first ring is larger than the outer diameter of the second ring, and the lower surface of the first ring is provided with the helical teeth; The lower surface of the spring abuts against the upper surface of the first ring, and the upper surface of the spring abuts against the vial bracket.

[0016] Further, two guide bars are provided on the inner wall of the medicine cartridge housing, and the space between the two guide bars is a sliding groove for the hidden needle sleeve; the automatic injection ejector provided on one side of the hidden needle sleeve is embedded in the sliding groove for the hidden needle sleeve.

[0017] Further, a limiting strip for the needle concealment sleeve is provided on the inner wall of the medicine cartridge housing. A step is provided above the needle concealment sleeve, and the upper surface of the limiting strip for the needle concealment sleeve is used to limit the step.

[0018] Further, an observation window is provided on the medicine cartridge housing, and an observation window is also provided on the needle concealment sleeve.

[0019] Further, the medicine cartridge further includes a medicine cartridge gland. The medicine cartridge gland is provided on the upper end surface of the medicine bottle support. A buckle is provided on the inner wall above the medicine cartridge housing, and the upper edge of the medicine cartridge gland is buckled by the buckle.

[0020] Furthermore, the medicine bottle support includes an upper end plate and a sleeve connecting the end plate. The pre-filled sealed medicine bottle is arranged in the sleeve. A receiving groove is provided on the upper side wall of the sleeve, and the locking sleeve ejector rod is arranged in the receiving groove.

[0021] Furthermore, a limiting plate extends downward from the lower surface of the end plate. An opening for avoiding the locking sleeve ejector rod is provided on the limiting plate, and limiting ribs are provided on the side wall of the opening. Limiting grooves are provided on both sides of the locking sleeve ejector rod, and the limiting ribs are snapped into the limiting grooves.

[0022] Furthermore, two limiting grooves are provided on each side of the locking sleeve ejector rod, and the two limiting grooves are horizontally arranged.

[0023] Furthermore, limiting ribs are provided on the inner wall of the medicine cartridge housing, and limiting grooves are provided on the outer edge of the medicine bottle support. The limiting ribs are snapped into the limiting grooves.

[0024] Furthermore, an annular groove is provided on the lower outer wall of the locking sleeve. A buckle is provided above the needle concealment sleeve, and the buckle is snapped into the annular groove. A spiral groove is provided on the outer wall of the medicine bottle support, and a thread is provided on the inner wall of the locking sleeve. The thread is snapped into the spiral groove. A spring is sleeved outside the locking sleeve. Under the action of the spring, the locking sleeve can axially move along with the axial movement of the needle concealment sleeve, and the locking sleeve has a rotational movement while axially moving. A spring limiting sleeve is further provided outside the locking sleeve. The upper surface of the spring limiting sleeve abuts against the upper edge of the medicine bottle support, the lower surface of the spring limiting sleeve abuts against the upper part of the spring, and the lower part of the spring abuts against the needle concealment sleeve. The locking sleeve ejector rod includes a connecting ring and two top blocks, and the two top blocks are respectively arranged on both sides above the medicine bottle support. A receiving groove is provided on the upper side wall of the medicine bottle bracket, and the top block is arranged in the receiving groove; two snap grooves are arranged on each receiving groove at an interval up and down, a limiting buckle is arranged inside the top block, and the limiting buckle can be snapped into the snap groove.

[0025] Furthermore, guide bars are arranged on the inner wall of the medicine bin housing, guide grooves are arranged on the hidden needle sleeve, and the guide bars are embedded in the guide grooves.

[0026] Furthermore, the medicine bin further includes a medicine bin pressing cover, and the medicine bin pressing cover is arranged on the upper end surface of the medicine bottle bracket; buckles are arranged on the inner wall above the medicine bin housing, and the buckles buckle the upper edge of the medicine bin pressing cover.

[0027] Furthermore, the medicine bottle bracket includes an upper end plate and a sleeve connecting the end plate, and the sleeve is used for arranging a pre-filled sealed medicine bottle; a receiving groove is arranged on the upper side wall of the sleeve.

[0028] Furthermore, two spiral inclined surfaces are arranged above the locking sleeve. In the initial state, the top block corresponds to the top surface of one of the spiral inclined surfaces; after the injection is completed, the top block is embedded between the two spiral inclined surfaces.

[0029] Furthermore, the automatic driving assembly includes a motor and a push rod. The output shaft of the motor is a lead screw. A through hole is arranged in the center of the push rod, threads are arranged on the inner wall of the through hole, and the lead screw is threadedly connected with the push rod; push rod oblique pins are arranged on both sides of the push rod.

[0030] Furthermore, a main board is arranged on one side of the motor. A first position switch and a second position switch are arranged on the main board. A triggering step is arranged on the side surface of the push rod. When the push rod moves along the axis, the triggering step can trigger the first position switch and the second position switch.

[0031] Furthermore, a row of equally spaced light belts are arranged on the main board, and the light belts are configured to be lit in sequence during the process of the triggering step moving from the first position switch to the second position switch.

[0032] Further, the main body further includes a middle ring and a medicine bin limiting ring, and the medicine bin limiting ring is arranged inside the middle ring; A wake-up lever is arranged on one side of the medicine bin limiting ring, and a wake-up trigger switch is arranged on the main board; A sliding track is arranged on the side wall of the middle ring, and the sliding track includes a starting section and a terminating section. The distance between the starting section and the wake-up trigger switch is greater than the distance between the terminating section and the wake-up trigger switch; The medicine cartridge is inserted into the middle ring and connected to the medicine cartridge limiting ring, and drives the medicine cartridge limiting ring to rotate along the inner side of the middle ring from the starting section to the ending section, so that the medicine cartridge is clamped in the middle ring and connected to the main body. At the same time, the wake-up lever triggers the wake-up trigger switch.

[0033] Further, the medicine cartridge limiting ring includes a second sliding convex hull and a positioning convex hull. The positioning convex hull is arranged at the bottom of the medicine cartridge limiting ring, and the second sliding convex hull is arranged on the outer side of the positioning convex hull; A positioning groove is arranged at the top of the medicine cartridge housing, and a first sliding convex hull is arranged at the bottom of the positioning groove. The first sliding convex hull protrudes from the medicine cartridge housing; When the medicine cartridge is not connected to the main body, the second sliding convex hull is located at the starting section; When the medicine cartridge is inserted into the middle ring and connected to the medicine cartridge limiting ring, the positioning convex hull is inserted into the positioning groove, and the first sliding convex hull and the second sliding convex hull are axially aligned.

[0034] Further, a medicine cartridge insertion track is arranged on the inner side wall of the middle ring. When the medicine cartridge is inserted into the middle ring and connected to the medicine cartridge limiting ring, the first sliding convex hull of the medicine cartridge housing is inserted into the medicine cartridge insertion track.

[0035] Further, a tactile feedback convex hull is also arranged on the outer wall of the medicine cartridge limiting ring; a first feedback groove and a second feedback groove are arranged on the inner wall of the middle ring; When the second sliding convex hull is located at the starting section, the tactile feedback convex hull is embedded in the first feedback groove; When the second sliding convex hull is located at the ending section, the tactile feedback convex hull is embedded in the second feedback groove.

[0036] Further, the tactile feedback convex hull has a triangular convex block structure and includes two asymmetric inclined thin surfaces; the angle range of the inclined thin surface in the rotation installation direction of the tactile feedback convex hull is 15°-30°; the angle range of the inclined thin surface in the rotation removal direction is 50°-70°.

[0037] In a second aspect, the present invention also provides a pen-type syringe control system for a syringe in which a main body and a medicine cartridge are detachably connected, including: An automatic wake-up module, configured to trigger the main body to be powered on and turned on when the medicine cartridge and the main body are connected, so that the main body enters a standby working state; An automatic injection module, configured to trigger the automatic drive assembly to push the piston of the medicine bottle in the medicine cartridge forward to complete the injection when the main body enters the standby working state and when one end of the medicine cartridge is pressed.

[0038] Further, it further includes: The injection status monitoring module is used to monitor the status of the injection trigger switch and the current status of the automatic driving component. When the injection trigger switch is in the released state or the current is abnormal, the injection status monitoring module sends a signal and controls the automatic driving component to stop injection.

[0039] Furthermore, it further includes: The networking module is used for communication connection with external devices.

[0040] Furthermore, the automatic wake-up module includes a wake-up circuit unit. The wake-up circuit unit includes a wake-up trigger switch. The second contact of the wake-up trigger switch is connected to the G poles of the first MOS transistor and the second MOS transistor. The S pole of the second MOS transistor is connected to the power supply, and the power supply supplies power to the host; the high-voltage end of the power supply is connected to the first contact of the wake-up trigger switch.

[0041] Furthermore, the automatic injection module includes: The skin sensing unit provided on the medicine cartridge is used to be triggered when the host enters the standby working state and when one end of the medicine cartridge is pressed. The automatic driving unit provided on the host is used to complete injection and reset after needle withdrawal after the skin sensing unit is triggered. The injection position unit provided on the host is used to monitor the starting position and the ending position of the automatic driving unit.

[0042] Even further, the skin sensing unit includes a skin sensing circuit. The skin sensing circuit includes an injection trigger switch, and the injection trigger switch is connected to the MCU control unit.

[0043] Even further, the automatic driving unit includes an automatic driving circuit. The automatic driving circuit includes a motor driving chip. The motor driving chip is connected to the MCU control unit through an IO control signal connection line and a current detection line; the motor driving chip is connected to the motor.

[0044] Even further, the injection position unit includes an injection position circuit. The injection position circuit includes a first position switch and a second position switch, and both the first position switch and the second position switch are connected to the MCU control unit.

[0045] Even further, the networking module includes a networking module circuit. The networking module circuit includes a Bluetooth chip. The Bluetooth chip is connected to the MCU control unit, and the Bluetooth chip is also connected to an antenna, and can communicate with external devices through the antenna.

[0046] In a third aspect, the present invention also provides an automatic injection control method for a pen-type syringe, which is used for a syringe with a detachable connection between the host and the medicine cartridge, including: S1. The main unit receives the trigger from the wake-up structure of the medicine cartridge, activates the wake-up trigger switch of the main unit, and makes the main unit enter the standby state. S2. The injection trigger switch receives the trigger signal from the inner needle sleeve in the medicine cartridge, and then transmits the injection signal to the MCU control unit, so that the MCU control unit drives the automatic drive assembly to move from the starting position to the end position to complete the injection. S3. According to the detection of the starting position and the end position, the light strip is sequentially lit during the movement of the automatic drive assembly until the sound prompt is triggered when the end position is reached. S4. After the injection trigger switch has no trigger signal, the automatic drive assembly moves in the reverse direction and returns to the starting position.

[0047] Further, during the process that the MCU control unit drives the automatic drive assembly to move from the starting position to the end position, the injection speed can be set through the Bluetooth APP; and during the injection process, the MCU control unit real-time monitors the motor current. If the motor current is abnormal, the MCU control unit controls the motor to stop running and indicates the injection abnormality through the light strip.

[0048] Compared with the prior art, the present invention has the following beneficial effects: The pen-type syringe, control system and automatic injection control method provided by the present invention, when the medicine cartridge is connected to the main unit, the main unit automatically switches from the sleep state to the standby state; after the main unit switches to the standby state, pressing one end of the medicine cartridge away from the main unit to make an injection action, the main unit automatically drives the push rod to press the pre-filled syringe to achieve injection; thus realizing automatic wake-up and automatic trigger injection, without the need for button operation, avoiding the situation of accidental button touch or trigger failure, and improving the safety and convenience of equipment use.

[0049] The pen-type syringe, control system and automatic injection control method provided by the present invention, by arranging a locking sleeve above the inner needle sleeve, the bottom of the locking sleeve and the upper part of the inner needle sleeve are mutually fitted. When not injecting, the locking sleeve and the inner needle sleeve can move freely, so that the inner needle in the pre-filled syringe can be exposed or hidden; after the injection is completed, the locking sleeve ejector rod can lock the locking sleeve, so that the inner needle in the pre-filled syringe cannot be exposed. Furthermore, the device provided by the present invention can be realized whether it is connected to the main unit or not. When not injecting, the needle can be hidden, and it does not affect the removal of the inner needle protection cap, providing a friendly experience for needle-phobic users; after injection, the inner needle sleeve is locked to prevent the inner needle from being exposed, preventing the needle from stabbing relevant personnel, improving the use safety, and in addition, avoiding the reuse of the medicine cartridge, the needle is hidden and protected after injection, avoiding secondary pollution, and improving the biological safety of the medicine cartridge.

[0050] The pen-type syringe provided by the present invention can achieve installation and disassembly by the cooperation of the medicine cartridge to drive the medicine cartridge limit ring to rotate along the inner side of the middle ring; the structure is simple and the process is fast and convenient; in addition, by setting convex bumps with different tactile feedback structures of the inclined surface angles, the force required to overcome the deformation of the elastic wall during installation is small, and a larger force is required to facilitate installation and removal. In addition to the tactile feedback to the user, different feedbacks on the second installation force are given, improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 Isometric view of the first embodiment of the present invention; Figure 2 Isometric view of the medicine cartridge described in the first embodiment of the present invention; Figure 3 Axial exploded view of the medicine cartridge described in the first embodiment of the present invention; Figure 4 Isometric view of the locking sleeve of the first embodiment of the present invention; Figure 5 Isometric view of the needle hiding sleeve of the first embodiment of the present invention; Figure 6 Internal structure diagram of the medicine cartridge housing of the first embodiment of the present invention; Figure 7 Isometric view of the medicine bottle bracket of the first embodiment of the present invention; Figure 8 Isometric view of the medicine bottle cap of the first embodiment of the present invention; Figure 9 Isometric view of the locking sleeve ejector rod of the first embodiment of the present invention; Figure 10 Isometric view of the first embodiment of the present invention in the initial state, with part of the outer wall of the medicine cartridge housing hidden; Figure 11 Lateral sectional view of the medicine cartridge described in the first embodiment of the present invention in the initial state; Figure 12 Isometric view of the medicine cartridge described in the first embodiment of the present invention in the second state, with part of the outer wall of the medicine cartridge housing hidden; Figure 13 Isometric view of the medicine cartridge described in the first embodiment of the present invention in the third state, with part of the outer wall of the medicine cartridge housing hidden; Figure 14 Isometric view of the medicine cartridge described in the first embodiment of the present invention in the fourth state, with the medicine cartridge housing hidden; Figure 15 Axial sectional view of the present invention before the push rod oblique pin in the main body contacts the locking sleeve ejector rod in the first embodiment; Figure 16 Axial sectional view of the present invention after the push rod oblique pin in the main body contacts the locking sleeve ejector rod in the first embodiment; Figure 17Cross-sectional structure diagram of the locking sleeve ejector rod in the first position in Embodiment 1 of the present invention; Figure 18 Cross-sectional structure diagram of the locking sleeve ejector rod in the first position in Embodiment 1 of the present invention; Figure 19 Axonometric view of the medicine cartridge in the fifth state in Embodiment 1 of the present invention, with some outer walls of the medicine cartridge housing hidden; Figure 20 Axonometric view of the medicine cartridge in the sixth state in Embodiment 1 of the present invention, with some outer walls of the medicine cartridge housing hidden; Figure 21a Schematic diagram of the internal structure of the main body of the present invention; Figure 21b Schematic diagram of the internal structure of the main body of the present invention from another angle; Figure 22 Schematic diagram of the structure of the medicine cartridge limit ring of the present invention; Figure 23 Schematic diagram of the external structure of the middle ring of the present invention; Figure 24 Schematic diagram of the internal structure of the middle ring of the present invention; Figure 25 Schematic diagram of the structure of the main body housing of the present invention; Figure 26 Partial axonometric view of the mating installation of the alignment groove and the alignment protrusion in the starting state of the present invention (hiding the main body housing); Figure 27 Partial axonometric view of the mating installation of the alignment groove and the alignment protrusion in the starting state of the present invention (hiding the main body housing and the middle ring); Figure 28 Partial axonometric view of the medicine cartridge and the medicine cartridge limit ring when they rotate to the end section after the installation of the medicine cartridge and the main body of the present invention (hiding the main body housing); Figure 29 Partial cross-sectional view of the main body when the medicine cartridge limit ring arranged in the middle ring is in the starting section in the present invention; Figure 30 Partial cross-sectional view of the main body when the medicine cartridge limit ring arranged in the middle ring is in the end section in the present invention; Figure 31 Position state diagram when the automatic injection ejector rod triggers the injection trigger switch; Figure 32 Axonometric view of the medicine cartridge in Embodiment 2 of the present invention; Figure 33 Axonometric view of the locking sleeve in Embodiment 2 of the present invention; Figure 34 Axonometric view of the needle concealment sleeve in Embodiment 2 of the present invention; Figure 35Internal structure diagram of the medicine cartridge housing for the second embodiment of the present invention; Figure 36 Axonometric view of the medicine bottle bracket for the second embodiment of the present invention; Figure 37 Axonometric view of the locking sleeve ejector rod for the second embodiment of the present invention; Figure 38 Axonometric view of the initial state of the medicine cartridge for the second embodiment of the present invention, with the medicine cartridge housing and the spring limit sleeve hidden; Figure 39 Axonometric view of the second state of the medicine cartridge for the second embodiment of the present invention, with the medicine cartridge housing and the spring limit sleeve hidden; Figure 40 Axonometric view of the third state of the medicine cartridge for the second embodiment of the present invention, with the medicine cartridge housing and the spring limit sleeve hidden; Figure 41 Axonometric view of the fourth state of the medicine cartridge for the second embodiment of the present invention, with the medicine cartridge housing and the spring limit sleeve hidden; Figure 42 Axial explosion view of the second embodiment of the present invention; Figure 43 Circuit schematic diagram of the automatic wake-up module for the third embodiment of the present invention; Figure 44 Circuit schematic diagram of the skin sensing circuit for the third embodiment of the present invention; Figure 45 Circuit schematic diagram of the automatic drive circuit for the third embodiment of the present invention; Figure 46 Circuit schematic diagram of the injection position circuit for the third embodiment of the present invention; Figure 47 Circuit schematic diagram of the networking module for the third embodiment of the present invention.

[0052] Explanation of reference numerals: 1. Hidden needle sleeve, 101. Sliding limit surface, 102. Chute, 103. Automatic injection ejector rod, 104. Snap, 105. Guide groove; 2. Medicine cartridge housing, 201. Active sliding oblique pin, 202. Guide bar, 203. Hidden needle sleeve sliding groove, 204. Hidden needle sleeve limit bar, 205. Observation window, 206. Snap [Fine 1], 207. Limit rib, 208. First sliding convex, 209. Alignment groove; 3. Locking sleeve, 301. Helical tooth, 302. Locking bar, 303. Annular groove, 304. Thread, 305. Spiral inclined surface, 3511. Bottom surface, 3512. Top surface; 4. Medicine bottle bracket, 401. End plate, 402. Sleeve, 403. Accommodation groove, 404. Ejector pin insertion hole for the push rod, 405. Limit rib, 406. Limit groove, 407. Spiral groove, 408. Snap groove, 5. Spring 6. Locking sleeve ejector rod, 601. Groove, 602. Inclined plane, 603. Limit groove, 604. Top block, 605. Limit buckle 7. Medicine cartridge gland, 701. Movable groove, 702. Installation surface, 703. Pusher insertion hole, 704. Pusher oblique pin insertion hole 8. Prefilled sealed medicine bottle, 9. Pusher, 901. Trigger step, 10. Pusher oblique pin, 11. Spring limit sleeve, 12. Mainframe housing, 1201. Middle ring limit groove; 13. Main board, 14. Injection trigger switch, 15. First position switch, 16. Second position switch, 17. Motor; 18. Middle ring, 1801. Sliding track, 1811. Starting section, 1812. Transition section, 1813. Termination section, 1802. Medicine cartridge insertion track, 1803. First feedback groove, 1804. Second feedback groove, 1805. Connecting stop surface, 1806. Wake-up lever avoidance groove, 1807. Middle ring limit rib; 19. Medicine cartridge limit ring, 1901. Wake-up lever, 1902. Second sliding convex hull, 1903. Alignment convex hull, 1904. Tactile feedback convex hull, 1905. Limit ring stop surface; 20. Wake-up trigger switch, 21. Power supply, 22. Main bracket. Detailed implementation mode

[0053] The technical solutions of the present invention will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0054] It should be noted that unless otherwise specifically stated, the relative arrangements and numerical expressions of the components and steps described in these embodiments should not be construed as limiting the scope of the present invention.

[0055] The following description of the exemplary embodiments is merely illustrative and in no way restricts the present invention and its application or use. Technologies, methods, and devices known to those of ordinary skill in the relevant fields may not be discussed in detail here, but when applicable, these technologies, methods, and devices should be regarded as part of this specification.

[0056] Embodiment 1 This embodiment provides a pen-type syringe, as Figure 1 shown, including a medicine cartridge and a mainframe. A prefilled sealed medicine bottle is arranged inside the medicine cartridge, and one end of the medicine cartridge is detachably connected to one end of the mainframe; a pusher 9 is arranged inside the mainframe; When the medicine bin is connected to the host, the host automatically switches from a dormant state to a standby state; After the host is switched to the standby state, the end of the medicine chamber away from the host is pressed to make it perform an injection action, and the host automatically drives the push rod 9 to push the pre-filled medicine bottle to achieve injection.

[0057] like Figure 3 As shown, the medicine chamber includes the hidden needle sleeve 1, and an automatic injection ejector rod 103 is arranged on one side of the hidden needle sleeve 1; a main board 13 is arranged in the main unit, and an injection trigger switch 14 is arranged on the main board 13. When the medicine chamber is connected to the main unit, the automatic injection ejector rod 103 corresponds to the position of the injection trigger switch 14; when the end of the medicine chamber away from the main unit is pressed to make it perform an injection action, the automatic injection ejector rod 103 triggers the injection trigger switch 14, so that the main unit automatically drives the push rod 9 to push the prefilled medicine bottle.

[0058] like Figure 2 and Figure 3 The figure shows the structural diagram of the medicine warehouse, which includes a hidden needle sleeve 1, a medicine warehouse shell 2, a locking sleeve 3, a medicine bottle holder 4, a locking sleeve push rod 6, a medicine warehouse pressure cover 7, and a reset element. The medicine warehouse shell 2 is a structural member with a through hole inside. The hidden needle sleeve 1 is arranged inside the medicine warehouse shell 2, and the hidden needle sleeve 1 extends out of the medicine warehouse shell 2 below; the locking sleeve 3 is arranged above the hidden needle sleeve 1, and the medicine bottle holder 4 is arranged inside the locking sleeve 3. The medicine bottle holder 4 has a through hole inside, and the inside is used to arrange a prefilled medicine bottle 8; the medicine warehouse pressure cover 7 is arranged above the medicine bottle holder 4, and the medicine warehouse pressure cover 7 is used to press the prefilled medicine bottle 8.

[0059] The bottom of the locking sleeve 3 and the top of the hidden needle sleeve 1 are interlocked with each other, and the locking sleeve push rod 6 is arranged above the medicine bottle bracket 4; Furthermore, when not injecting, the locking sleeve 3 and the hidden needle sleeve 1 can move freely, so that the hidden needle inside the pre-filled medicine bottle 8 can be exposed or hidden; After the injection is completed, the locking sleeve push rod 6 can lock the locking sleeve 3 so that the hidden needle inside the prefilled medicine bottle 8 cannot be exposed.

[0060] The whole medicine chamber is a disposable medicine packaging material. When not injecting, the hidden needle cover 1 can move freely, so that the needle protection cover can be removed, abnormal touch, needle insertion can be performed to retract the hidden needle cover 1 to expose the needle, and the needle insertion action can be completed simultaneously. After the injection is completed, the locking cover 3 is locked, and the hidden needle cover 1 cannot move freely, so that the hidden needle inside the pre-filled medicine bottle 8 cannot be exposed, avoiding the hidden needle needle from stabbing the operator and avoiding the risk of the device being reused.

[0061] likeFigure 4 The structure diagram of the locking sleeve 3 is shown. The locking sleeve 3 includes a first ring at the lower part and a second ring at the upper part. The outer diameter of the first ring is larger than that of the second ring. The lower surface of the first ring is provided with helical teeth 301; the inclination directions of the helical teeth 301 all face the same side. A plurality of locking bars 302 are arranged on the upper surface of the second ring, and the locking bars 302 extend upward. In this embodiment, a total of six locking bars 302 are arranged on the second ring, and each locking bar 302 has the same size, and the six locking bars 302 are evenly distributed along the circumferential direction.

[0062] Moreover, the helical teeth 301 of the locking sleeve 3 correspond to the positions of the locking bars 302, that is, the tips of the helical teeth 301 are almost aligned with the left side wall of the locking bars 302.

[0063] As Figure 5 The structure diagram of the hidden needle sleeve 1 is shown. The upper surface of the hidden needle sleeve 1 is provided with a sliding limiting surface 101 that cooperates with the helical teeth 301. The sliding limiting surface 101 has high points and low points, and the connecting surface between the high points and the low points is an inclined surface. Therefore, the sliding limiting surface 101 is a surface with high points and low points alternating and repeating, and each low point corresponds to a helical tooth 301. A sliding groove 102 is also arranged on the side wall above the hidden needle sleeve 1. In addition, an automatic injection ejector rod 103 is arranged on the side wall above the hidden needle sleeve 1. The automatic injection ejector rod 103 cooperates with the main body to activate the automatic injection function in the main body by using the automatic injection ejector rod 103. In order to facilitate observing the drug injection situation inside the hidden needle sleeve 1, an observation window is also arranged on the side wall of the hidden needle sleeve 1.

[0064] As Figure 6 The structure diagram of the medicine cartridge outer shell 2 is shown. The upper half of the medicine cartridge outer shell 2 is a circular ring structure, and the inner diameter of the lower half gradually decreases to match the outer diameter of the hidden needle sleeve 1. Two guide bars 202 are arranged on the inner wall of the medicine cartridge outer shell 2, and between the two guide bars 202 is a hidden needle sleeve sliding groove 203; the automatic injection ejector rod 103 of the hidden needle sleeve 1 is embedded in the hidden needle sleeve sliding groove 203. Then, when the hidden needle sleeve 1 moves up and down freely, since the automatic injection ejector rod 103 is limited in the hidden needle sleeve sliding groove 203, the hidden needle sleeve 1 can only move along the axial direction of the medicine cartridge outer shell 2 and cannot rotate.

[0065] A driving sliding oblique pin 201 is also arranged on the inner wall of the medicine cartridge outer shell 2, and the driving sliding oblique pin 201 can be embedded in the sliding groove 102 of the hidden needle sleeve 1. When not injecting, the upper surface of the driving sliding oblique pin 201 abuts against the inclined surface of the helical teeth 301 of the locking sleeve 3, and the side surface of the driving sliding oblique pin 201 abuts against the surface approximately perpendicular to the helical teeth 301 of the locking sleeve 3.

[0066] In this embodiment, a total of three driving sliding oblique pins 201 are arranged along the circumferential direction, and the three driving sliding oblique pins 201 are evenly distributed.

[0067] On the inner wall of the medicine cartridge outer shell 2, a plurality of hidden needle sleeve limiting strips 204 are further provided, and the plurality of hidden needle sleeve limiting strips 204 are arranged along the circumferential direction of the medicine cartridge outer shell 2; the outer diameter of the upper part of the hidden needle sleeve 1 is larger than that of the lower part, thus forming a step, and the upper surface of the hidden needle sleeve limiting strip 204 is used to limit the step. This prevents the hidden needle sleeve 1 from slipping out from below the medicine cartridge outer shell 2.

[0068] An observation window 205 is also provided on the medicine cartridge outer shell 2, and the observation window 205 on the medicine cartridge outer shell 2 corresponds to the position of the observation window on the hidden needle sleeve 1. Therefore, through the observation window, the internal pre-filled syringe 8 can be directly observed.

[0069] A buckle 206 is provided on the inner wall above the medicine cartridge outer shell 2, and the buckle 206 presses the upper edge of the medicine cartridge cover 7, so that the medicine cartridge cover 7 is tightly installed on the medicine cartridge outer shell 2.

[0070] As Figure 7 Shown is the structural diagram of the medicine bottle bracket 4. The medicine bottle bracket 4 includes an upper end plate 401 and a sleeve 402 connecting the end plate 401. The sleeve 402 is used to accommodate the pre-filled syringe 8; a receiving groove 403 is provided on the upper side wall of the sleeve 402, and the locking sleeve ejector rod 6 is arranged in the receiving groove 403. The number of the locking sleeve ejector rods 6 is 2, and the two locking sleeve ejector rods 6 are respectively arranged on both sides above the medicine bottle bracket 4.

[0071] An ejector pin oblique pin insertion hole 404 is provided above the end plate 401, and the ejector pin oblique pin insertion hole 404 corresponds to the position of the locking sleeve ejector rod 6 in the axial direction. In the main machine connected to the device of this embodiment, there is an ejector rod 9. On both sides of the ejector rod 9, there are ejector pin oblique pins 10. During injection, the ejector rod 9 is inserted into the through hole in the center of the medicine bottle bracket 4 to push the liquid medicine in the pre-filled syringe 8, and the ejector pin oblique pin 10 is inserted into the ejector pin oblique pin insertion hole 404 to lock the locking sleeve 3.

[0072] On one side of the end plate 401, an avoidance groove is also provided to avoid the automatic injection ejector rod 103 of the hidden needle sleeve; in addition, a limiting groove is provided on the edge of the end plate 401, and the limiting groove cooperates with the limiting rib on the inner wall of the medicine cartridge outer shell to limit the rotation of the medicine bottle bracket. Two convex blocks are also provided on the upper surface of the end plate 401. Above the pre-filled syringe 8, there is a cover plate. Both sides of the cover plate are flat surfaces, and the cover plate is embedded between the two convex blocks to limit the rotation of the pre-filled syringe 8. Above the cover plate of the pre-filled syringe 8, the medicine cartridge cover 7 is covered to fix the pre-filled syringe 8.

[0073] A limiting plate extends downward from the lower surface of the end plate 401, and an opening for avoiding the locking sleeve ejector rod 6 is provided on the limiting plate.

[0074] As Figure 8The structure diagram of the medicine bin gland 7 is shown. The center of the medicine bin gland 7 has a push rod insertion hole 703 for the insertion of the push rod 9. On both sides of the push rod insertion hole 703, there are push rod oblique pin insertion holes 704. The push rod oblique pin insertion holes 704 of the medicine bin gland 7 correspond to the positions of the push rod oblique pin insertion holes 404 of the medicine bottle bracket 4, both of which are for the insertion of the push rod oblique pin 10.

[0075] On one side of the medicine bin gland 7, there is also a movable groove 701 for avoiding the automatic injection ejector rod 103 of the needle hiding sleeve 1. The outer edge of the medicine bin gland 7 has a step, and the step surface is the mounting surface 702. The buckle 206 of the medicine bin housing 2 buckles the mounting surface 702, thereby realizing the assembly of the medicine bin gland 7.

[0076] As Figure 9 The structure diagram of the locking sleeve ejector rod 6 is shown. A downward groove 601 is provided on the upper surface of the locking sleeve ejector rod 6. The inner wall of the outer side of the groove 601 is an inclined surface 602. The push rod oblique pin 10 passes through the push rod oblique pin insertion hole 704 of the medicine bin gland 7 and the push rod oblique pin insertion hole 404 of the medicine bottle bracket 4 in sequence and then inserts into the groove 601, and the lower surface of the push rod oblique pin 10 presses the inclined surface 602 to move the locking sleeve ejector rod 6 outward.

[0077] Limit ribs 405 are provided on the side walls of the opening of the medicine bottle bracket 4; limit grooves 603 are provided on both sides of the locking sleeve ejector rod 6, and the limit ribs 405 are snapped into the limit grooves 603 to limit the locking sleeve ejector rod 6. Two limit grooves 603 are provided on each side of the locking sleeve ejector rod 6, and the two limit grooves 603 are arranged horizontally. The two limit grooves 603 respectively correspond to two position states of the locking sleeve ejector rod 6: Position 1: The limit rib 405 is snapped into the limit groove 603 on the outer side of the locking sleeve ejector rod 6; Position 2: The limit rib 405 is snapped into the limit groove 603 on the inner side of the locking sleeve ejector rod 6; Among them, the inner side and the outer side are based on the radial direction of the medicine bottle bracket 4. The side close to the central axis of the medicine bottle bracket 4 is the inner side, and the side far from the central axis of the medicine bottle bracket 4 is the outer side.

[0078] Below the locking sleeve ejector rod 6 is a rod-shaped structure. As Figure 10 The initial state when the device of this embodiment is not in use is shown. At this time, one of the locking bars 302 of the locking sleeve 3 corresponds to the locking sleeve ejector rod 6 up and down; and the width of the locking sleeve ejector rod 6 is smaller than the distance between the adjacent locking bars 302.

[0079] The helical teeth 301 of the locking sleeve 3 are stuck on the active sliding pin 201. The active sliding pin 201 is embedded in the sliding groove 102 of the hidden needle sleeve 1, and the helical teeth 301 are in contact with the sliding limit surface 101 of the hidden needle sleeve 1. However, the tip of the helical teeth 301 is not at the lowest point of the sliding limit surface 101. Due to the limitation of the active sliding pin 201, the locking sleeve 3 and the hidden needle sleeve 1 are in a stable state at this time.

[0080] A reset element is also sleeved outside the locking sleeve 3. Under the action of the reset element, the helical teeth 301 can rotate as the hidden needle sleeve 1 moves axially, and the tip position of the helical teeth 301 switches between the highest point and the lowest point.

[0081] Among them, the reset element is preferably a spring 5. The lower surface of the spring 5 abuts against the upper surface of the first ring, and the upper surface of the spring 5 abuts against the vial holder 4.

[0082] As Figure 11 shown in the internal structure diagram of the device in the initial state, the outer wall of the rod-shaped structure below the locking sleeve ejector rod 6 is flush with the outer wall of the vial holder 4. At this time, when the hidden needle sleeve 1 is pushed upward from the lower surface of the hidden needle sleeve 1, when the tip of the helical teeth 301 of the locking sleeve 3 is just higher than the active sliding pin 201, the initial state switches to the second state, as Figure 12 shown.

[0083] Figure 12 In the second state shown, due to the rebound of the spring 5, the locking sleeve 3 is urged to move downward, and the tip of the helical teeth 301 abuts against the sliding limit surface 101 of the hidden needle sleeve 1 again, and the tip is not at the lowest point of the sliding limit surface 101. Therefore, there is a tendency for the tip to move towards the lowest point, so the locking sleeve 3 moves downward and rotates under the action of the spring.

[0084] After the movement, the second state switches to the third state as Figure 13 shown. At this time, the tip of the helical teeth 301 moves to the lowest point of the sliding limit surface 101. However, at this time, since the side surface of the helical teeth 301 is not blocked by the active sliding pin 201, the locking sleeve 3 still has a tendency to rotate. Therefore, under the action of the spring 5, the locking sleeve 3 continues to rotate until it returns to the Figure 10 initial state shown. Therefore, in the case of no injection, the locking sleeve 3 and the hidden needle sleeve 1 can move freely.

[0085] When the hidden needle sleeve 1 retracts a large distance in the medicine cartridge housing, as Figure 14 shown, when the hidden needle sleeve 1 moves upward from the initial state, it first switches to the Figure 12 second state shown, and then continues to move upward. The tip of the helical teeth 301 moves to the lowest point of the sliding limit surface 101, and then switches to the Figure 14In the fourth state shown, the locking sleeve 3 has rotated a certain angle relative to the initial state, at which time the locking strip 302 of the locking sleeve 3 and the locking sleeve push rod 6 are staggered, and the locking sleeve push rod 6 and the locking strip 302 are spaced oppositely. The hidden needle sleeve 1 continues to move upward, and the locking sleeve push rod 6 is inserted into the space between the locking strips 302, at which time the needle protection sleeve of the hidden needle is completely exposed, and the needle protection sleeve can be removed.

[0086] If the device of this embodiment is associated with a host, then Figure 10 In the state shown, during injection, the hidden needle cover 1 retracts inward (moves upward) due to the obstruction of the skin, and the automatic injection push rod 103 of the hidden needle cover 1 moves upward and extends out of the medicine chamber cover 7, and the automatic injection push rod 103 triggers the injection function of the host. Figure 15 The figure shows an axial cross-sectional view of the push rod bevel pin 10 in the main unit before it contacts the locking sleeve push rod 6. After the injection function of the main unit is triggered, the push rod 9 starts to move downward, and the push rod bevel pins 10 on both sides of the push rod 9 successively pass through the push rod bevel pin insertion hole 704 of the medicine chamber pressure cover 7 and the push rod bevel pin insertion hole 404 of the medicine bottle holder 4, and then are inserted into the groove 601 of the locking sleeve push rod 6.

[0087] like Figure 16 As shown, the push rod inclined pin 10 continues to move downward, and the lower surface of the push rod inclined pin 10 is an inclined surface that matches the inclined surface 602 of the locking sleeve push rod 6. The inclined surface of the push rod inclined pin 10 pushes the locking sleeve push rod 6 outward, causing the locking sleeve push rod 6 to move outward, so that the locking sleeve push rod 6 moves from position one to position two.

[0088] like Figure 17 The cross-sectional structure diagram at position 1 is shown as follows. Figure 18 The cross-sectional structure diagram is shown in position 2. When the locking sleeve push rod 6 is in position 1, the limiting rib 405 of the medicine bottle holder 4 is located in the limiting groove 603 on the outer side of the locking sleeve push rod 6. As the locking sleeve push rod 6 moves outward, the limiting rib 405 of the medicine bottle holder 4 gradually moves into the limiting groove 603 on the inner side of the locking sleeve push rod 6.

[0089] When the locking sleeve push rod 6 moves outward to position two, the locking sleeve push rod 6 protrudes relative to the outer wall of the medicine bottle holder 4. During the process of the locking sleeve push rod 6 moving outward, the push rod 9 pushes the medicine downward to complete the injection process.

[0090] After the injection is completed, the device of this embodiment is pulled out, and the needle is exposed. At the same time, the locking sleeve 3 moves downward under the action of the spring 5, and switches to Figure 19 In the fifth state shown, as the locking sleeve 3 continues to move, the relative positions of the locking sleeve 3 and the hidden needle sleeve 1 are restored to Figure 10The stable state shown, but at this time, the position of the locking sleeve ejector rod 6 has changed, and it slides outwards from the receiving groove 403 of the medicine bottle bracket 4, so that the lower surface of the locking sleeve ejector rod 6 is arranged opposite to the locking strip 302 of the locking sleeve 3, and it is switched to as Figure 20 shown in the sixth state.

[0091] Moreover, after the relative positions of the locking sleeve 3 and the hidden needle sleeve 1 are restored to Figure 10 the stable state shown, the hidden needle sleeve 1 hides the hidden needle. At the same time, if the hidden needle sleeve 1 is continuously squeezed upwards, since the locking sleeve 3 is blocked by the locking sleeve ejector rod 6, the tip of the helical tooth 301 of the locking sleeve 3 cannot be higher than the active sliding pin 201, so the locking sleeve 3 cannot continue to move upwards or rotate. It can be considered that the hidden needle sleeve 1 and the locking sleeve 3 are in a locked state at this time, so that an effective anti-stabbing protection effect can be achieved on the needle.

[0092] In addition, after the injection is completed; set the distance between the lower surface of the locking sleeve ejector rod 6 and the upper surface of one of the locking strips 302 as , the distance between the hidden needle inside the pre-filled syringe 8 and the lower surface of the hidden needle sleeve 1 is , the tip height of the helical tooth 301 is , then < , < .

[0093] As Figure 21a and Figure 21b shown is the internal structure diagram of the main unit. The main unit includes a main bracket 22, a motor 17 is installed above the main bracket 22, and a shaft extends below the motor 17. The shaft of the motor 17 is a lead screw; a push rod 9 is threadedly connected to the lead screw. A through hole is provided in the center of the push rod 9, and threads are provided on the inner wall of the through hole. The lead screw and the push rod 9 are threadedly connected through the through hole.

[0094] A main board 13 is arranged on one side of the main bracket, and a power supply 21 is arranged on the other side of the main bracket 22. The power supply 21 is used to supply power to the main board 13 and the motor 17.

[0095] A first position switch 15 and a second position switch 16 are arranged on the side of the main board 13 close to the push rod 9. A trigger step 901 is arranged on the surface of the push rod 9. When the push rod 9 moves along the axis, the trigger step 901 can trigger the first position switch 15 and the second position switch 16.

[0096] In addition, an injection trigger switch 14 is further arranged below the side of the main board 13 close to the push rod 9, and a wake-up trigger switch 20 is arranged below the side of the main board 13 far from the push rod 9.

[0097] A middle ring 18 and a medicine bin limiting ring 19 are arranged below the main support 22, and the medicine bin limiting ring 19 is arranged inside the middle ring 18; The medicine bin is inserted into the middle ring 18 and connected to the medicine bin limiting ring 19, and drives the medicine bin limiting ring 19 to rotate along the inner side of the middle ring 18 from the starting position to the ending position, so that the medicine bin is clamped inside the middle ring 18 and connected to the main machine.

[0098] As Figure 2 shown, a positioning groove 209 is arranged at the top of the medicine bin housing 2, and a first sliding convex bump 208 is arranged at the bottom of the positioning groove 209, and the first sliding convex bump 208 protrudes from the medicine bin housing 2; two groups of the positioning groove 209 and the first sliding convex bump 208 are symmetrically arranged with the center of the medicine bin housing as the center of the circle.

[0099] As Figure 22 shown, the medicine bin limiting ring 19 includes a second sliding convex bump 1902 and a positioning convex bump 1903, the positioning convex bump 1903 is arranged at the bottom of the medicine bin limiting ring 19, and the second sliding convex bump 1902 is arranged on the outer side of the positioning convex bump 1903; The shape and position of the positioning convex bump 1903 are matched with the shape and position of the positioning groove 209.

[0100] During actual installation, the medicine bin is inserted into the middle ring 18, the positioning convex bump 1903 of the medicine bin limiting ring 19 is clamped in the positioning groove 209 of the medicine bin housing 2, and rotating the medicine bin can drive the medicine bin limiting ring 19 to rotate. At this time, the first slider convex bump 208 is in contact with the second slider convex bump 1902.

[0101] Combined with Figure 23 、 Figure 24 shown, a sliding track 1801 is arranged on the side wall of the middle ring 18, a medicine bin insertion track 1802 is arranged on the inner side of the side wall of the middle ring 18, and a threaded connection stop surface 1805 is arranged at the top inside the middle ring 18; the sliding track 1801 includes a starting section 1811, and the medicine bin insertion track 1802 is connected to the starting section 1811; A threaded limiting ring stop surface 1905 is further arranged on the outer wall of the top of the medicine bin limiting ring 19, and the medicine bin limiting ring 19 is threadedly connected to the middle ring 18 through the limiting ring stop surface 1905. In the initial state, the second sliding convex bump 1902 extends into the starting section 1811 of the sliding track 1801.

[0102] The limiting ring stop surface 1905 and the connection stop surface 1805 are spiral surfaces.

[0103] The sliding track 1801 further includes a transition section 1812 and a termination section 1813; the position of the termination section 1813 is higher than that of the starting section 1811, and the termination section 1813 is connected to the starting section 1811 through an inclined transition section 1812.

[0104] As Figures 26 to 28 shown, during actual installation, the first slider boss 208 is inserted into the middle ring 18 along the medicine cartridge insertion track 1802, and the alignment boss 1903 of the medicine cartridge limiting ring 19 is snapped into the alignment groove 209 of the medicine cartridge housing 2. Rotating the medicine cartridge can drive the medicine cartridge limiting ring 19 to rotate along the sliding track 1801.

[0105] Since the inner wall of the middle ring 18 is thicker than the wall thickness at the medicine cartridge insertion track 1802, after rotating out of the starting section 1811, the medicine cartridge can be snapped into the transition section 1812 or the termination section 1813 of the sliding track 1801 through the first sliding boss 208; when continuing to rotate, due to the threaded connection relationship between the middle ring 18 and the medicine cartridge limiting ring 19, the positions of the medicine cartridge housing 2 and the medicine cartridge limiting ring 19 will gradually rise compared to the middle ring 18 until it is fixed after rotating to the termination section 1813. At this time, the limiting ring stop surface 1905 of the medicine cartridge limiting ring 19 and the connection stop surface 1805 of the middle ring 18 are in a tightly screwed state.

[0106] Combined with Figure 29 and Figure 30 shown, the pen-type syringe further includes a tactile feedback mechanism, and the tactile feedback mechanism includes a tactile feedback boss 1904 and a tactile feedback groove; The tactile feedback boss 1904 is of an elastic structure and is arranged on the outer wall of the medicine cartridge limiting ring 19; the shapes of the tactile feedback boss 1904 and the tactile feedback groove are matched; The tactile feedback groove includes a first feedback groove 1803 and a second feedback groove 1804. When the second sliding boss 1902 of the medicine cartridge limiting ring 19 is located at the starting section 1811, the first feedback groove 1803 is arranged at the inner wall of the middle ring 18 corresponding to the tactile feedback boss 1904; when the second sliding boss 1902 of the medicine cartridge limiting ring 19 is located at the termination section 1813, the second feedback groove 1804 is arranged at the inner wall of the middle ring 18 corresponding to the tactile feedback boss 1904.

[0107] The tactile feedback boss 1904 has a triangular convex block structure and includes two asymmetric inclined thin surfaces.

[0108] The angle range of the inclined thin surface of the tactile feedback boss 1904 in the rotation installation direction is 15° - 30°; the angle range of the inclined thin surface in the rotation removal direction is 50° - 70°.

[0109] The tactile feedback mechanism is set as an elastic structure with a locally thin wall, which can be elastically deformed during movement. The clockwise rotating installation inclined plane is set as a small-angle acute angle, and the force required to overcome the deformation of the elastic wall is small. The inclined plane for counterclockwise rotating and removing the medicine cartridge is set as an acute angle with a larger angle, and a relatively large force needs to be overcome during the process of removing the medicine cartridge, providing different feedback on the second installation force in addition to the tactile feedback at the user's end, improving the user experience.

[0110] As Figure 27 and Figure 28 shown, the pen-type syringe also activates a feedback structure, which includes a wake-up lever 1901, a wake-up trigger switch 20, and a buzzer. The wake-up trigger switch 20 and the buzzer are arranged on the main board 13; a wake-up lever avoidance groove 1806 is opened at the top of the middle ring 18, and the wake-up lever 1901 is arranged on the medicine cartridge limit ring 19 and extends out of the wake-up lever avoidance groove 1806; The wake-up trigger switch 20 is located at the end position of the movement of the wake-up lever 1901.

[0111] When the medicine cartridge drives the medicine cartridge limit ring 19 to rotate from the starting section 1811 to the ending section 1813, the wake-up lever 1901 just toggles the wake-up trigger switch 20. The function of the wake-up trigger switch 20 is to wake up the host in the sleep state and make it in the waiting-for-injection state. Synchronously, the buzzer arranged on the host makes a sound to prompt the user that the medicine cartridge is installed in place.

[0112] As Figure 25 shown, the host further includes a host housing 12. A middle ring limit groove 1201 is provided on the inner wall of the host housing 12, and a middle ring limit rib 1807 matching the middle ring limit groove 1201 is provided on the outer wall of the middle ring 18. The middle ring 18 and the host housing 12 are fixed by ultrasonic welding.

[0113] The operation process of the pen-type syringe provided in this embodiment is as follows: First, connect the medicine cartridge to the host. After the medicine cartridge and the host are connected and locked, the host switches from the sleep state to the wake-up standby state.

[0114] Then, remove the needle protection cap, hold the pen-type syringe to complete the needle insertion action, and perform the injection. During the injection process, after the patient completes the needle insertion action with the injection pen, the hidden needle sleeve 1 arranged on the medicine cartridge moves axially towards the host direction, and the automatic injection ejector rod 103 triggers the injection trigger switch 14.

[0115] After that, the host makes the push rod 9 linearly move axially towards the medicine cartridge direction through the operation of the motor 17, and pushes the piston of the pre-filled syringe to complete the injection action. The motor 17 drives the push rod 9 from the starting position to the ending position.

[0116] Synchronously, the light strip set on the main unit displays the progress of the liquid medicine being pushed in by lighting up one by one. When the injection is completed and all the liquid medicine has been pushed in, the light strip is fully lit; simultaneously, the buzzer set on the main unit works to indicate that the injection is completed. At this time, the user can be reminded of the completion of the injection in a dual manner and can then remove the needle.

[0117] After that, remove the needle. After removing the needle, the motor 17 drives the lead screw to reverse, causing the push rod 9 to retract to the starting position.

[0118] Remove the medicine cartridge, release the wake-up trigger switch 20, and the device automatically powers off.

[0119] Embodiment 2 The difference between this embodiment and Embodiment 1 lies in the internal structure of the medicine cartridge, and the other structures are the same.

[0120] The medicine cartridge structure of this embodiment is as Figure 32 and Figure 42 shown. The medicine cartridge includes a hidden needle sleeve 1, a medicine cartridge outer shell 2, a locking sleeve 3, a medicine bottle bracket 4, a locking sleeve ejector rod 6, a medicine cartridge gland 7, and a reset element. The medicine cartridge outer shell 2 is a structural member with a through hole inside. The hidden needle sleeve 1 is arranged inside the medicine cartridge outer shell 2, and the hidden needle sleeve 1 extends out of the medicine cartridge outer shell 2 below; the locking sleeve 3 is arranged above the hidden needle sleeve 1, and the medicine bottle bracket 4 is arranged inside the locking sleeve 3. The medicine bottle bracket 4 has a through hole inside, and a pre-filled sealed medicine bottle 8 is arranged inside it; the medicine cartridge gland 7 is arranged above the medicine bottle bracket 4, and the medicine cartridge gland 7 is used to press the pre-filled sealed medicine bottle 8 tightly.

[0121] The bottom of the locking sleeve 3 and the upper part of the hidden needle sleeve 1 are fitted with each other, and the locking sleeve ejector rod 6 is arranged above the medicine bottle bracket 4; Furthermore, when not injecting, the locking sleeve 3 and the hidden needle sleeve 1 can move freely, so that the hidden needle inside the pre-filled sealed medicine bottle 8 can be exposed or hidden; After the injection is completed, the locking sleeve ejector rod 6 can lock the locking sleeve 3, so that the hidden needle inside the pre-filled sealed medicine bottle 8 cannot be exposed.

[0122] The overall device for providing a hidden needle and protecting against needle pricks after injection is a disposable medical packaging material. When not injecting, the hidden needle sleeve 1 can move freely, and thus it can achieve removing the needle protection sleeve, abnormal touch, pricking the needle to cause the hidden needle sleeve 1 to retract and expose the needle, and synchronously completing the pricking action. After the injection is completed, the locking sleeve 3 is locked, and thus the hidden needle sleeve 1 can no longer move freely, making the hidden needle inside the pre-filled sealed medicine bottle 8 unable to be exposed, avoiding the hidden needle from pricking the operator and also avoiding the risk of reusing the device.

[0123] As Figure 33The structure diagram of the locking sleeve 3 is shown. The locking sleeve 3 has a cylindrical structure. An annular groove 303 is provided on the outer side wall below the locking sleeve 3, and a spiral inclined surface 305 is provided above the locking sleeve 3. In this embodiment, two spiral inclined surfaces 305 are provided in total, and each spiral inclined surface 305 has a bottom surface 3511 and a top surface 3512. In addition, a thread 304 is also provided on the inner wall of the locking sleeve 3, and the spiral direction of the thread 304 is the same as that of the spiral inclined surface 305.

[0124] As Figure 34 The structure diagram of the hidden needle sleeve 1 is shown. A buckle 104 is provided above the hidden needle sleeve 1, and the buckle 104 is snapped into the annular groove 303; an automatic injection ejector rod 103 is also provided above the hidden needle sleeve 1. The automatic injection ejector rod 103 cooperates with the main body to activate the automatic injection function in the main body by using the automatic injection ejector rod 103. The main body is an electronic injection pen that cooperates with the device providing the hidden needle and the post-injection needle anti-stabbing protection in this embodiment.

[0125] In addition, a guide groove 105 is provided at the edge above the hidden needle sleeve 1 for cooperating with the medicine cartridge housing 2.

[0126] As Figure 35 The structure diagram of the medicine cartridge housing 2 is shown. A guide bar 202 is provided on the inner wall of the medicine cartridge housing 2, and the guide bar 202 is embedded in the guide groove 105 of the hidden needle sleeve 1 to prevent the hidden needle sleeve 1 from rotating relative to the medicine cartridge housing 2. Therefore, the hidden needle sleeve 1 can only move axially relative to the medicine cartridge housing 2. A limiting rib 207 is also provided on the inner wall of the medicine cartridge housing 2, and the limiting rib 207 is used to limit the rotation of the medicine bottle bracket 4.

[0127] In addition, a buckle 206 is provided on the inner wall above the medicine cartridge housing 2, and the buckle 206 presses the upper edge of the medicine cartridge cap 7 to tightly mount the medicine cartridge cap 7 on the medicine cartridge housing 2.

[0128] As Figure 36 The structure diagram of the medicine bottle bracket 4 is shown. The medicine bottle bracket 4 includes an upper end plate 401 and a sleeve 402 connecting the end plate 401. The pre-filled syringe 8 is arranged in the sleeve 402; a spiral groove 407 is provided on the outer part of the sleeve 402, and the thread 304 on the inner wall of the locking sleeve 3 is snapped into the spiral groove 407. Thus, while the locking sleeve 3 moves up and down, it also makes a rotational motion.

[0129] A limiting groove 406 is provided on the outer edge of the end plate 401 of the medicine bottle support 4, and the limiting rib 207 of the medicine bin housing 2 is embedded in the limiting groove 406 on the outer edge of the end plate 401 to limit the rotation of the medicine bottle support 4. In addition, a push rod angled pin insertion hole 404 is also provided on the end plate 401. The push rod angled pin insertion hole 404 corresponds to the position of the locking sleeve ejector rod 6 in the axial direction, specifically corresponding to the position of the top block 604 of the locking sleeve ejector rod 6. The mainframe connected to the device of this embodiment has a push rod 9, and push rod angled pins 10 are provided on both sides of the push rod 9. During injection, the push rod 9 is inserted into the through hole in the center of the medicine bottle support 4 to push the liquid medicine in the pre-filled sealed medicine bottle 8, and the push rod angled pin 10 is inserted into the push rod angled pin insertion hole 404 to lock the locking sleeve 3.

[0130] An avoidance hole is also provided on one side of the end plate 401 to allow the automatic injection ejector rod 103 of the hidden needle sleeve 1 to pass through; two convex blocks are also provided on the upper surface of the end plate 401. There is a cover plate above the pre-filled sealed medicine bottle 8, and both sides of the cover plate are flat surfaces. The cover plate is embedded between the two convex blocks to limit the rotation of the pre-filled sealed medicine bottle 8. A medicine bin capping 7 covers the upper part of the cover plate of the pre-filled sealed medicine bottle 8 to fix the pre-filled sealed medicine bottle 8.

[0131] As Figure 37 Shown is the structural diagram of the locking sleeve ejector rod 6. The locking sleeve ejector rod 6 includes a connecting ring and two top blocks 604, and the two top blocks 604 are respectively arranged on both sides above the medicine bottle support 4.

[0132] A receiving groove 403 is provided on the upper side wall of the sleeve 402 of the medicine bottle support 4, and the top block 604 is arranged in the receiving groove 403; two snap grooves 408 spaced up and down are provided on each receiving groove 403, and a limiting buckle 605 is arranged inside the top block 604, and the limiting buckle 605 can be snapped into the snap groove 408.

[0133] A reset element is also sleeved outside the locking sleeve 3. Under the action of the reset element, the locking sleeve 3 can move axially along with the axial movement of the hidden needle sleeve 1, and the locking sleeve 3 has a rotational movement while moving axially.

[0134] The reset element is a spring 5. A spring limit sleeve 11 is also provided outside the locking sleeve 3. The upper surface of the spring limit sleeve 11 abuts against the upper edge of the medicine bottle support 4, the lower surface of the spring limit sleeve 11 abuts against the upper part of the spring 5, and the lower part of the spring 5 abuts against the hidden needle sleeve 1. In addition, the lower surface of the spring limit sleeve 11 also abuts against the upper surface of the guide bar 202 of the medicine bin housing 2, thereby limiting the spring limit sleeve 11 between the guide bar 202 and the end plate 401 of the medicine bottle support 4.

[0135] The medicine bin capping 7 in this embodiment has the same structure as the medicine bin capping 7 in the first embodiment, and the connection between the medicine bin capping 7 and the medicine bin housing 2 is also the same.

[0136] As Figure 38 shown, in the initial state, the top block 604 corresponds to the top surface 3512 of one of the spiral inclined surfaces 305; at this time, the limit buckle 605 of the top block 604 is snapped into the upper buckle groove 408, that is, the position of the top block 604 at this time is called position one. In addition, in the initial state, the hidden needle is hidden inside the hidden needle sleeve 1.

[0137] When the hidden needle sleeve 1 is pushed upward from the lower surface of the hidden needle sleeve 1, the hidden needle sleeve 1 makes an axial movement under the limitation of the medicine cartridge housing 2, and the locking sleeve 3 makes a spiral movement due to the cooperation of the thread 304 and the spiral groove 407. Therefore, the device of this embodiment is switched from the initial state to Figure 39 the second state shown. After the hidden needle sleeve 1 rises a certain distance, the hidden needle is exposed. At this time, the needle protection sleeve of the hidden needle can be removed.

[0138] When the hidden needle sleeve 1 is released, under the action of the spring 5, the spring 5 squeezes the locking sleeve 3 to move downward. The locking sleeve 3 spirals downward, and the hidden needle sleeve 1 moves axially downward. The locking sleeve 3 and the hidden needle sleeve 1 return to Figure 38 the state shown. Therefore, in the non-injection state, the hidden needle sleeve 1 can move freely, including abnormal touches, etc., and will not cause the locking of the hidden needle sleeve 1 and the locking sleeve 3.

[0139] When the device of this embodiment is connected to the host and injection is performed, the hidden needle sleeve 1 moves upward relative to the hidden needle under the skin block. When the automatic injection ejector rod 103 triggers the automatic injection function of the host, the ejector rod 9 starts to move downward. The ejector rod pins 10 on both sides of the ejector rod 9 sequentially pass through the ejector rod pin insertion holes 704 of the medicine cartridge gland 7 and the ejector rod pin insertion holes 404 of the medicine bottle bracket 4 and then contact the top block 604 of the locking sleeve ejector rod 6.

[0140] The ejector rod 9 continues to move downward. The ejector rod pin 10 pushes the top block 604 to make the locking sleeve ejector rod 6 move downward. The limit buckle 605 of the top block 604 disengages from the upper buckle groove 408 and moves downward along the receiving groove 403 until the limit buckle 605 is snapped into the lower buckle groove 408. The position of the top block 604 at this time is called position two, that is Figure 40 the third state shown. And, the top block 604 is embedded between the two spiral inclined surfaces 305 and is arranged opposite to the bottom surface 3511. At this time, the injection is completed.

[0141] After the needle is withdrawn, the locking sleeve 3 is reset under the action of the spring 5. After resetting, the locking sleeve 3 rotates to Figure 41 the state shown. At this time, the top surface 3512 of the spiral inclined surface 305 is arranged opposite to the top block 604. If the hidden needle sleeve 1 is pushed upward continuously, due to the block of the top block 604, the hidden needle sleeve 1 and the locking sleeve 3 cannot move upward, realizing the locking of the locking sleeve 3 and the hidden needle sleeve 1, and then an effective anti-stabbing protection effect can be achieved on the needle.

[0142] Embodiment III This embodiment provides a pen - type syringe control system for controlling the above - mentioned pen - type syringe, including: An automatic wake - up module, which is used to trigger the host to power on and start when the medicine cartridge and the host are connected, so that the host enters a state of waiting for work; An automatic injection module, which is used to trigger the automatic drive component to push the piston of the medicine bottle in the medicine cartridge forward to complete the injection when the host enters the state of waiting for work and one end of the medicine cartridge is pressed.

[0143] An injection state monitoring module, which is used to monitor the state of the injection trigger switch 14 and the current state of the automatic drive component. When the injection trigger switch 14 is in the released state or the current is abnormal, the injection state monitoring module sends a signal and controls the automatic drive component to stop the injection.

[0144] A networking module, which is used to communicate and connect with external devices.

[0145] Among them, the automatic wake - up module includes a wake - up circuit unit, as Figure 43 shown. The wake - up circuit unit includes a wake - up trigger switch 20 (SW1). The second contact of the wake - up trigger switch 20 (SW1) is connected to the G - poles of the first MOS transistor and the second MOS transistor. The S - pole of the second MOS transistor is connected to the power supply 21 (J1), and the power supply 21 (J1) supplies power to the host; the high - voltage end of the power supply 21 (J1) is connected to the first contact of the wake - up trigger switch 20 (SW1).

[0146] When the wake - up trigger switch 20 (SW1) is pressed by force, the power supply 21 (J1) is turned on through the first MOS transistor and the second MOS transistor, realizing power supply to the host by the power supply 21 (J1).

[0147] The automatic injection module includes: A skin - sensing unit arranged on the medicine cartridge, which is used to be triggered when the host enters the state of waiting for work and one end of the medicine cartridge is pressed; An automatic drive unit arranged on the host, which is used to complete the injection and reset after needle withdrawal after the skin - sensing unit is triggered; An injection position unit arranged on the host, which is used to monitor the starting position and the ending position of the automatic drive unit.

[0148] As Figure 44 shown, the skin - sensing unit includes a skin - sensing circuit. The skin - sensing circuit includes an injection trigger switch 14 (SW6), and the injection trigger switch 14 (SW6) is connected to the MCU control unit. After the injection trigger switch 14 (SW6) is pressed by force, the MCU control unit receives an injection signal and drives the automatic drive unit to act.

[0149] As Figure 45 shown, the automatic drive unit includes an automatic drive circuit, and the automatic drive circuit includes a motor drive chip. The motor drive chip is connected to the MCU control unit through IO control signal connection lines (MOTOR_IN1 and MOTOR_IN2) and a current detection line (MOTOR_CURRENT_ADC); the motor drive chip is connected to the motor 17. Additionally, the drive mode of the motor 17 can be selected through mode selection.

[0150] As Figure 46 shown, the injection position unit includes an injection position circuit, and the injection position circuit includes a first position switch 15 (SW7) and a second position switch 16 (SW8). Both the first position switch 15 (SW7) and the second position switch 16 (SW8) are connected to the MCU control unit. When both the first position switch 15 (SW7) and the second position switch 16 (SW8) are triggered and pressed, it indicates that the push rod 9 is at the starting position. When both the first position switch 15 (SW7) and the second position switch 16 (SW8) are released, it indicates that the push rod 9 is at the end position.

[0151] As Figure 47 shown, the networking module includes a networking module circuit, and the networking module circuit includes a Bluetooth chip. The Bluetooth chip is connected to the MCU control unit, and the Bluetooth chip is also connected to an antenna A1. Through the antenna A1, communication connection with an external device can be established.

[0152] The control principle of the pen - type syringe control system provided in this embodiment is as follows: First, connect the medicine cartridge to the host. After the connection and locking between the medicine cartridge and the host are completed, the host switches from the sleep state to the wake - up standby state, and at the same time, the MCU monitors the status of each unit.

[0153] Then, remove the needle protection cap, hold the pen - type syringe to complete the needle - insertion action, and perform injection. During the injection process, after the patient completes the needle - insertion action with the injection pen, the hidden needle sleeve 1 on the medicine cartridge moves axially towards the host direction, and the automatic injection push rod 103 triggers the injection trigger switch 14. At the same time, the MCU control unit determines whether to start injection through the SW_SKIN status (switch SW6, i.e., the injection trigger switch 14), and monitors the motor current in real - time through MOTOR_CURRENT_ADC.

[0154] When starting to insert the needle, the hidden needle sleeve 1 is pressed, triggering the switch SW6, and SW_SKIN changes from high level to low level. The signal is transmitted to the MCU control unit, and the MCU issues a start - injection instruction to control the output of the levels of MOTOR_IN1 and MOTOR_IN2.

[0155] Meanwhile, the host makes the push rod 9 linearly move axially towards the medicine bin by the operation of the motor 17, and pushes the piston of the pre-filled syringe to complete the injection action. The motor 17 drives the push rod 9 to move forward from the initial position (the switch SW7, i.e., the first position switch 15, and the switch SW8, i.e., the second position switch 16, and both the switch SW7 and the switch SW8 are triggered) until the end position (both the switch SW7 and the switch SW8 are released).

[0156] Synchronously, the light strip set on the host displays the progress of the liquid medicine propulsion by lighting up one by one. When the injection is completed and all the liquid medicine is pushed in, the light strip is fully lit; the buzzer set on the host works synchronously to prompt the completion of the injection. At this time, the user can be double-reminded that the injection is completed and the needle can be removed.

[0157] Synchronously, by calculating the running speed and time of the motor and combining the comprehensive situation of the detection positions of the two push rods, the lighting operation control of the injection progress indicator light is controlled. During the injection process, the MCU control unit will monitor the motor current MOTOR_CURRENT_ADC in real time. If it is detected that the current reaches the set threshold value Imax, the MCU controller will stop the motor operation and give an abnormal reminder through the indicator light and the buzzer.

[0158] When the switch fails during the injection process, the motor will continue to move forward, and the MCU controller will continuously monitor the motor current. When the current reaches the set threshold value, the MCU controller will stop the motor operation and give an abnormal reminder of the injection through the indicator light.

[0159] In addition, a Bluetooth module is provided on the main board, which has Bluetooth transceiver functions. It can connect to Bluetooth devices, and the injection speed can be set through the Bluetooth APP. During the injection process, the MCU control unit will monitor the motor current MOTOR_CURRENT_ADC in real time. If an abnormality occurs, the MCU controller will stop the motor operation and give an abnormal reminder of the injection through the indicator light.

[0160] After the device is woken up and powered on, it will automatically connect to the nearby bound mobile phone APP, synchronize the treatment information to the mobile phone, and the mobile phone can also send parameters to the device. In addition, the mobile phone APP will be synchronized with the web cloud in real time; in this way, the doctor can set up the treatment course online, and the doctor and other personnel can view the patient's treatment data through the mobile phone APP or the cloud web page. If there is any omission, a reminder can also be set.

[0161] After that, the needle is removed. After the needle is removed, the motor 17 drives the lead screw to reverse, and the push rod 9 retracts to the starting position SW7.

[0162] The medicine bin is removed, the wake-up trigger switch 20 is released, and the device automatically powers off.

[0163] Embodiment 4 This embodiment provides an automatic injection control method for a pen-type syringe, which is used to control the above-mentioned pen-type syringe or cooperate with the above-mentioned pen-type syringe control system, and includes: S1. The host receives the trigger from the wake-up structure of the medicine cartridge, activates the wake-up trigger switch 20 of the host, and makes the host enter the standby working state; S2. The injection trigger switch 14 receives the trigger signal from the inner needle sleeve 1 in the medicine cartridge, and then transmits the injection signal to the MCU control unit, so that the MCU control unit drives the automatic drive component to move from the starting position to the end position to complete the injection; S3. According to the detection of the starting position and the end position, the light strip is sequentially lit during the movement of the automatic drive component until a sound prompt is triggered when the end position is reached; S4. After there is no trigger signal on the injection trigger switch, the automatic drive component moves in the reverse direction and returns to the starting position.

[0164] In addition, during the process of the MCU control unit driving the automatic drive component to move from the starting position to the end position, the injection speed can be set through the Bluetooth APP; and during the injection process, the MCU control unit monitors the motor current in real time. If the motor current is abnormal, the MCU control unit controls the motor 17 to stop running and indicates the injection abnormality through the light strip.

[0165] The above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the examples, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A pen-type syringe, comprising a medicine storage chamber and a main body, characterized in that, One end of the medicine storage is detachably connected to one end of the main body. The medicine storage is provided with a wake-up structure, and the main body has a wake-up trigger switch. The wake-up structure is configured such that when the medicine storage is connected to the main body, the wake-up structure can trigger the power switch of the main body to make the main body enter a standby working state. The medicine storage is further provided with a hidden needle linkage mechanism, and the hidden needle linkage mechanism includes a hidden needle sleeve. An injection trigger switch and an automatic driving component are arranged inside the main body. The hidden needle linkage mechanism is configured such that when the main body is in a standby working state and one end of the hidden needle sleeve is stressed, the hidden needle linkage mechanism will move towards the main body direction, trigger the injection trigger switch, and make the automatic driving component move towards the medicine storage direction to push the piston of the medicine bottle inside the medicine storage forward to complete the injection of the liquid medicine.

2. The pen-type syringe according to claim 1, wherein, The hidden needle linkage mechanism is configured such that when the injection of the liquid medicine is completed and the needle is pulled out, the needle is hidden and restricted inside the medicine storage.

3. The pen-type syringe according to claim 1 or 2, characterized in that, The wake-up structure is a wake-up lever, and the wake-up lever is arranged at one end where the medicine storage is connected to the main body. When the medicine storage is installed on the main body, the wake-up lever can trigger the wake-up trigger switch.

4. The pen-type syringe according to claim 2, characterized in that, An automatic injection ejector rod is arranged on one side of the hidden needle sleeve. When the main body is in a standby working state and one end of the hidden needle sleeve is stressed, the hidden needle linkage mechanism will move towards the main body direction; the automatic injection ejector rod triggers the injection trigger switch, and makes the automatic driving component move towards the medicine storage direction to push the piston of the medicine bottle inside the medicine storage forward to complete the injection of the liquid medicine.

5. The pen-type syringe according to claim 4, characterized in that, The medicine storage further includes a medicine storage outer shell, and an active sliding oblique pin is arranged inside the medicine storage outer shell. A sliding groove is arranged on the side wall of the hidden needle sleeve, and the active sliding oblique pin can be embedded into the sliding groove.

6. The pen - type syringe according to claim 5, characterized in that, The medicine storage further includes a medicine storage outer shell, a locking sleeve, a medicine bottle bracket, and a locking sleeve ejector rod. An active sliding oblique pin is arranged inside the medicine storage outer shell. A sliding groove is arranged on the side wall of the hidden needle sleeve, and the active sliding oblique pin can be embedded into the sliding groove. The hidden needle sleeve is arranged inside the medicine storage outer shell, and the hidden needle sleeve extends out of the medicine storage outer shell below. The locking sleeve is arranged above the hidden needle sleeve, and the medicine bottle bracket is arranged inside the locking sleeve. The inside of the medicine bottle bracket is used for arranging a pre-filled sealed medicine bottle. The bottom of the locking sleeve and the upper part of the hidden needle sleeve are mutually embedded, and a locking sleeve ejector rod is arranged above the medicine bottle bracket. Furthermore, when not injecting, the locking sleeve and the hidden needle sleeve can move freely, so that the hidden needle inside the pre-filled sealed medicine bottle can be exposed or hidden. After the injection is completed, the locking sleeve ejector rod can lock the locking sleeve, so that the hidden needle inside the pre-filled sealed medicine bottle cannot be exposed.

7. The pen-type syringe according to claim 6, characterized in that, Circumferentially uniformly distributed oblique teeth are arranged on the lower surface of the locking sleeve, and a sliding limit surface matched with the oblique teeth is arranged on the upper surface of the hidden needle sleeve. The sliding limit surface has a high point and a low point, and the connecting surface between the high point and the low point is an inclined surface. A spring is also sleeved outside the locking sleeve. Under the action of the spring, the oblique teeth can rotate along with the axial movement of the hidden needle sleeve, and the tooth tip position of the oblique teeth switches between the high point and the low point. A plurality of locking bars are provided on the locking sleeve. In the initial state, one of the locking bars corresponds to the locking sleeve ejector rod vertically; and the width of the locking sleeve ejector rod is smaller than the distance between adjacent locking bars. After the injection is completed; set the distance between the lower surface of the locking sleeve ejector rod and the upper surface of one of the locking bars to be , the distance between the hidden needle inside the pre-filled syringe and the lower surface of the hidden needle sleeve is , the tooth tip height of the helical teeth is , then < , < ; The number of the locking sleeve ejector rods is 2, and the two locking sleeve ejector rods are respectively arranged on both sides above the medicine bottle bracket. A receiving groove is provided on the upper side wall of the medicine bottle bracket, and the locking sleeve ejector rod is arranged in the receiving groove. A push rod oblique pin insertion hole is provided above the medicine bottle bracket, and the push rod oblique pin insertion hole corresponds to the position of the locking sleeve ejector rod in the axial direction. A downward groove is provided on the upper surface of the locking sleeve ejector rod, and the inner wall of the outside of the groove is an inclined surface. The automatic driving assembly has a push rod oblique pin, and the push rod oblique pin is inserted into the groove after passing through the push rod oblique pin insertion hole.

8. The pen-type syringe according to claim 6, characterized in that, An annular groove is provided on the outer wall below the locking sleeve, and a buckle is provided above the hidden needle sleeve, and the buckle is snapped into the annular groove; a spiral groove is provided on the outer wall of the medicine bottle bracket, and a thread is provided on the inner wall of the locking sleeve, and the thread is snapped into the spiral groove. A spring is further sleeved outside the locking sleeve. Under the action of the spring, the locking sleeve can move axially along with the axial movement of the hidden needle sleeve, and the locking sleeve has a rotational movement while moving axially. A spring limiting sleeve is further provided outside the locking sleeve. The upper surface of the spring limiting sleeve abuts against the upper edge of the medicine bottle bracket, the lower surface of the spring limiting sleeve abuts against the upper part of the spring, and the lower part of the spring abuts against the hidden needle sleeve. The locking sleeve ejector rod includes a connecting ring and two top blocks, and the two top blocks are respectively arranged on both sides above the medicine bottle bracket. A receiving groove is provided on the upper side wall of the medicine bottle bracket, and the top block is arranged in the receiving groove; two snap grooves are provided at upper and lower intervals on each receiving groove, and a limiting buckle is provided inside the top block, and the limiting buckle can be snapped into the snap groove.

9. The pen-type syringe according to claim 1, characterized in that, The automatic driving assembly includes a motor and a push rod. The output shaft of the motor is a lead screw. A through hole is provided in the center of the push rod, and a thread is provided on the inner wall of the through hole. The lead screw is threadedly connected to the push rod; push rod oblique pins are provided on both sides of the push rod.

10. The pen-type syringe according to claim 9, characterized in that, A main board is provided on one side of the motor. A first position switch and a second position switch are provided on the main board. A trigger step is provided on the side surface of the push rod. When the push rod moves along the axis, the trigger step can trigger the first position switch and the second position switch.

11. The pen-type syringe according to claim 10, characterized in that, A row of equally spaced light belts are provided on the main board, and the light belts are configured to be lit in sequence during the process that the trigger step moves from the first position switch to the second position switch.

12. A pen-type syringe control system for a syringe with a detachable connection between a main unit and a medicine cartridge, characterized in that, Including: An automatic wake-up module, which is used to trigger the host to be powered on and turned on when the medicine cartridge and the host are connected, so that the host enters the standby working state. An automatic injection module, which is used to trigger the automatic driving assembly to push the piston of the medicine bottle in the medicine cartridge forward to complete the injection when the host enters the standby working state and when one end of the medicine cartridge is pressed.

13. The pen-type syringe control system according to claim 12, characterized in that, It further includes: An injection status monitoring module is used to monitor the status of the injection trigger switch and the current status of the automatic drive component. When the injection trigger switch is in the released state or the current is abnormal, the injection status monitoring module sends a signal and controls the automatic drive component to stop injection.

14. The pen-type syringe control system according to claim 12, characterized in that, It further includes: A networking module for communicating and connecting with external devices.

15. The pen-type syringe control system according to claim 12, wherein The automatic wake-up module includes a wake-up circuit unit. The wake-up circuit unit includes a wake-up trigger switch. The second contact of the wake-up trigger switch is connected to the G poles of the first MOS transistor and the second MOS transistor. The S pole of the second MOS transistor is connected to the power supply, and the power supply supplies power to the host; the high-voltage end of the power supply is connected to the first contact of the wake-up trigger switch.

16. The pen-type syringe control system according to claim 12, wherein, The automatic injection module includes: A skin sensing unit provided on the medicine cartridge, which is triggered when the host enters the standby working state and when one end of the medicine cartridge is pressed. An automatic drive unit provided on the host, which is used to complete injection and reset after needle withdrawal after the skin sensing unit is triggered. An injection position unit provided on the host, which is used to monitor the starting position and the ending position of the automatic drive unit.

17. The pen-type syringe control system according to claim 16, characterized in that, The skin sensing unit includes a skin sensing circuit, and the skin sensing circuit includes an injection trigger switch, and the injection trigger switch is connected to the MCU control unit.

18. The pen-type syringe control system according to claim 16, wherein, The automatic drive unit includes an automatic drive circuit, and the automatic drive circuit includes a motor drive chip. The motor drive chip is connected to the MCU control unit through an IO control signal connection line and a current detection line; the motor drive chip is connected to the motor.

19. The pen-type syringe control system according to claim 16, characterized in that, The injection position unit includes an injection position circuit, and the injection position circuit includes a first position switch and a second position switch. Both the first position switch and the second position switch are connected to the MCU control unit.

20. The pen-type syringe control system according to claim 14, characterized in that, The networking module includes a networking module circuit, and the networking module circuit includes a Bluetooth chip. The Bluetooth chip is connected to the MCU control unit, and the Bluetooth chip is also connected to an antenna, and can communicate and connect with external devices through the antenna.

21. An automatic injection control method for a pen-type syringe, which is used for a syringe with a detachable connection between a main body and a medicine cartridge, characterized in that, It includes: S1. The host receives the trigger from the wake-up structure of the medicine cartridge, activates the wake-up trigger switch of the host, and makes the host enter the standby working state. S2. The injection trigger switch receives the trigger signal from the inner needle sleeve in the medicine cartridge, and then transmits the injection signal to the MCU control unit, so that the MCU control unit drives the automatic drive component to move from the starting position to the ending position to complete the injection. S3. According to the detection of the starting position and the ending position, the light strips are sequentially lit during the movement of the automatic drive component until a sound prompt is triggered when the ending position is reached. S4. After there is no trigger signal on the injection trigger switch, the automatic drive component moves in the reverse direction and returns to the starting position.

22. The automatic injection control method according to claim 21, wherein, During the process that the MCU control unit drives the automatic drive component to move from the starting position to the ending position, the injection speed can be set through the Bluetooth APP; and during the injection process, the MCU control unit monitors the motor current in real time. If the motor current is abnormal, the MCU control unit controls the motor to stop running and indicates the injection abnormality through the light strip.

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