Intelligent needleless injector

Abstract

The application discloses an intelligent needleless injector, and particularly relates to the field of needleless injection technology, which comprises an outer shell, a support is arranged in the inner cavity of the outer shell, a motor seat is linearly and slidingly arranged in the inner cavity of the thick end of the support, a driving motor is arranged in the motor seat, an energy storage mechanism is driven at the output end of the driving motor, the energy storage mechanism is always abutted against a driving spring extending towards the driving motor, the other end of the driving spring is abutted against the inner cavity step of the support, and the driving spring is abutted against a pressure sensor at any end, a dose adjusting motor is fixedly arranged at the end of the energy storage mechanism close to the driving motor, a medicine taking mechanism is driven at the output end of the dose adjusting motor, a connecting rod of the medicine taking mechanism is connected with a push rod, a medicine storage cylinder is connected to the slender end of the support, and the end of the push rod away from the medicine taking mechanism is connected with a piston, even if the elasticity of the driving spring decreases after long-term use, the initial injection pressure can be accurately controlled, and the skin can be ensured to be punctured.

Description

Technical Field

[0001] This utility model belongs to the field of needle-free injection technology, specifically relating to an intelligent needle-free injector. Background Technology

[0002] Needle-free injection, also known as jet injection, is a medical device that uses a power source to generate instantaneous high pressure, causing the drug (liquid or lyophilized powder) in the syringe to pass through a nozzle in a high-speed, high-pressure jet (flow velocity generally greater than 100 m / s). This allows the drug to penetrate the outer layer of the skin and release its effects into the subcutaneous and intradermal tissue layers. There are various types of power sources for injection, one of which is a spring. However, with prolonged use, the spring force in existing spring-driven needle-free injection devices decreases, leading to a drop in injection pressure and making it difficult to pierce the skin, thus increasing the risk of needle-free injection failure.

[0003] For example, the existing spring-motor composite-powered needle-free injector with publication number CN114159649A "includes a motor, an energy storage drive, a striking element, a spring, an ampoule, and an injection plunger installed in the ampoule. The spring is sleeved around the striking element. The motor drives the energy storage drive in reverse rotation, causing the striking element to move from a first position to a second position, thus deforming the spring and storing energy. The spring releases the stored energy at the second position, causing the striking element to return from the second position to the first position. Simultaneously, the motor drives the energy storage drive in forward rotation, causing the striking element to return from the second position to the first position, thereby striking the injection plunger in the ampoule to achieve injection." This application uses spring energy storage, but the spring force will decrease after long-term use, significantly increasing the probability of needle-free injection failure. Therefore, a new type of intelligent needle-free injector is needed. Utility Model Content

[0004] To address the aforementioned problems, this utility model discloses an intelligent needle-free injector.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A smart needle-free injector includes a housing, in which a bracket is fixedly installed. A motor mount is linearly slidably installed in the inner cavity of the thicker end of the bracket. A drive motor is fitted inside the motor mount, and the output end of the drive motor drives an energy storage mechanism. The energy storage mechanism is always pressed against a drive spring extending towards the drive motor, and the other end of the drive spring abuts against a step in the inner cavity of the bracket. Either end of the drive spring also abuts against a pressure sensor. A dosage adjustment motor is fixedly installed at the end of the energy storage mechanism near the drive motor. The output end of the dosage adjustment motor drives a drug dispensing mechanism. A push rod is connected to the connecting rod of the drug dispensing mechanism. A drug storage cylinder is connected to the slender end of the bracket. A piston is installed inside the drug storage cylinder, and the end of the push rod away from the drug dispensing mechanism is connected to the piston. The housing and the bracket are jointly equipped with several locking and releasing components, which are used to simultaneously lock the motor mount that has moved to the end of the bracket.

[0007] As a preferred embodiment of this utility model, the energy storage mechanism is a first energy storage mechanism. The first energy storage mechanism includes an internally threaded connecting cylinder that is coaxially and fixedly connected to the output end of the drive motor. The internally threaded connecting cylinder is threadedly connected to an externally threaded sleeve. A split-type drug-retrieving nut is slidably fitted inside the cavity of the externally threaded sleeve. Both the externally threaded sleeve and the split-type drug-retrieving nut are linearly and slidably connected to the bracket. The outer convex ring of the externally threaded sleeve abuts against one end of the drive spring. The split-type drug-retrieving nut contacts a support spring that is always pressed against the inner wall of the slender end of the bracket, and the elastic force of the support spring is less than that of the drive spring.

[0008] As a preferred embodiment of this utility model, the energy storage mechanism is a second energy storage mechanism. The second energy storage mechanism includes an externally threaded connecting cylinder that is coaxially and fixedly connected to the output end of the drive motor. An internally threaded sleeve is threadedly connected to the externally threaded connecting cylinder. A split-type drug-dispensing nut is slidably fitted inside the internally threaded sleeve. Both the internally threaded sleeve and the split-type drug-dispensing nut are linearly and slidably connected to the bracket. The outer convex ring of the internally threaded sleeve abuts against one end of the drive spring. The split-type drug-dispensing nut contacts a support spring that is always pressed against the inner wall of the slender end of the bracket, and the elastic force of the support spring is less than that of the drive spring.

[0009] As a preferred technical solution of this utility model, the energy storage mechanism is a third energy storage mechanism. The third energy storage mechanism includes an internally threaded connecting cylinder that is coaxially and fixedly connected to the output end of the drive motor. The internally threaded connecting cylinder is threadedly connected to an integral medicine-retrieving nut. The integral medicine-retrieving nut is linearly and slidably connected to the bracket. The outer convex ring of the integral medicine-retrieving nut abuts against one end of the drive spring.

[0010] As a preferred technical solution of this utility model, the drug dispensing mechanism is a first drug dispensing mechanism. The first drug dispensing mechanism includes a drive insert that is coaxially and fixedly connected to the output end of the dosage adjustment motor. The drive insert is coaxially and linearly slidably inserted with an external threaded connecting rod, and the external threaded connecting rod is threadedly connected to the drug dispensing nut. The external threaded connecting rod is coaxially and rotatably engaged with the push rod.

[0011] As a preferred technical solution of this utility model, the drug dispensing mechanism is a second drug dispensing mechanism. The second drug dispensing mechanism includes a drive screw that is coaxially and fixedly connected to the output end of the dose adjustment motor. The drive screw is coaxially threaded with a sliding connecting rod, and the sliding connecting rod is linearly and slidably connected to the drug dispensing nut. The sliding connecting rod is coaxially and rotatably engaged with the push rod.

[0012] As a preferred technical solution of this utility model, each of the locking release components includes a lever fixing pin connected to the bracket at both ends. The lever fixing pin is connected to a lever. One end of the lever is provided with a notch adapted to lock the edge of the motor seat. The housing is radially slidably mounted with a release button adapted to the other end of the lever. One end of the lever that contacts the release button extends with a leaf spring that always pushes the end of the lever against the release button. The end of the leaf spring away from the lever is rolled up, and the rolled-up end of the leaf spring always slides against the extension of the bracket.

[0013] As a preferred embodiment of this utility model, the outer shell is equipped with two locking and releasing components, and the two locking and releasing components respectively set the lever as a long lever and a short lever.

[0014] As a preferred technical solution of this utility model, the inner wall of the bracket is provided with a step to restrict the disengagement of the medicine nut from the connecting rod. The bracket is composed of a left bracket and a right bracket assembled together, and the left bracket and the right bracket are threadedly connected to the medicine storage cylinder.

[0015] As a preferred embodiment of this utility model, the drug-dispensing nut is provided with a through hole or through groove parallel to its own axis for wiring the dose adjustment motor, and the bracket is provided with a through hole for wiring the drive motor and the dose adjustment motor.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. This application is equipped with a pressure sensor. When the drive motor compresses the drive spring to store force, the initial injection pressure can be preset according to clinical data. Even if the elasticity of the drive spring decreases after long-term use, the initial injection pressure can still be accurately controlled to ensure skin puncture and reduce the probability of needle-free injection failure.

[0018] 2. During injection, the motor base, drive motor, energy storage mechanism, and drug dispensing mechanism of this application move together with the push rod and piston at any time, resulting in greater inertia of the injection component, slower pressure drop during needle-free injection, and stable drug injection.

[0019] 3. This application uses a dose-adjusting motor to drive the push rod to draw the drug, ensuring accurate and reliable drug dispensing. Attached Figure Description

[0020] Figure 1 This is an exploded view of the overall structure in the initial state of Embodiment 1 of this utility model;

[0021] Figure 2 An exploded view of the left support, right support, first energy storage mechanism, first medicine dispensing mechanism, internal threaded connecting cylinder, split medicine dispensing nut, drive spring, pressure sensor, support spring, medicine storage cylinder, motor base, drive motor, long lever, lever fixing pin and release button in the initial state of Embodiment 1 of this utility model;

[0022] Figure 3 This is an exploded view of the left bracket, right bracket, circuit board, display screen, and battery of Embodiment 1 of this utility model;

[0023] Figure 4 This is a partial cross-sectional view of the left support, first energy storage mechanism, first drug dispensing mechanism, internally threaded connecting cylinder, split-type drug dispensing nut, drive spring, pressure sensor, dosage adjustment motor, support spring, drug storage cylinder, piston, push rod, motor base, drive motor, long lever, short lever, lever fixing pin, release button and leaf spring in the initial state of Embodiment 1 of this utility model.

[0024] Figure 5 This is an exploded view of the external threaded sleeve, drive insert, external threaded connecting rod, internal threaded connecting cylinder, split-type drug dispensing nut, dosage adjustment motor, and push rod of Embodiment 1 of this utility model;

[0025] Figure 6 This is an overall sectional view of the first embodiment of the present invention, showing the motor base stuck after the drive spring is compressed and the protective cover and right bracket removed.

[0026] Figure 7 This is an overall sectional view of the motor base after it is jammed and the drive spring is compressed, without removing the medicine, in Embodiment 1 of this utility model;

[0027] Figure 8 This is an overall sectional view of the first embodiment of the present invention, after the motor base is stuck and the drive spring is compressed, and the medicine has been removed, with the protective cover and the right bracket removed.

[0028] Figure 9This is a partial cross-sectional view of the left support, second energy storage mechanism, first medicine dispensing mechanism, split medicine dispensing nut, drive spring, pressure sensor, support spring, medicine storage cylinder, motor base, drive motor, long lever, lever fixing pin, release button and leaf spring in the initial state of Embodiment 2 of this utility model.

[0029] Figure 10 This is an exploded view of the externally threaded connecting cylinder, internally threaded sleeve, drive insert, externally threaded connecting rod, split-type drug dispensing nut, and dosage adjustment motor in the initial state of Embodiment 2 of this utility model.

[0030] Figure 11 This is a partial cross-sectional view of the left support, third energy storage mechanism, first medicine dispensing mechanism, internally threaded connecting cylinder, drive spring, pressure sensor, medicine storage cylinder, motor base, drive motor, long lever, lever fixing pin, release button and leaf spring in the initial state of Embodiment 3 of this utility model.

[0031] Figure 12 An exploded view of the integrated drug dispensing nut, drive strip, external threaded connecting rod, internal threaded connecting cylinder and dosage adjustment motor in the initial state of Embodiment 3 of this utility model;

[0032] Figure 13 This is a partial cross-sectional view of the left support, first energy storage mechanism, second drug dispensing mechanism, internally threaded connecting cylinder, split-type drug dispensing nut, drive spring, pressure sensor, dosage adjustment motor, support spring, drug storage cylinder, motor base, drive motor, long lever, lever fixing pin, release button and leaf spring in the initial state of Embodiment 4 of this utility model.

[0033] Figure 14 This is an exploded view of the external threaded sleeve, drive screw, sliding connecting rod, internal threaded connecting sleeve, split-type drug dispensing nut, and dosage adjustment motor in the initial state of Embodiment 4 of this utility model.

[0034] List of identifiers in attached diagrams:

[0035] 1. Upper outer shell; 2. Lower outer shell; 3. Left support; 4. Right support;

[0036] 5. First energy storage mechanism; 501. External threaded sleeve;

[0037] 6. Second energy storage mechanism; 601. External threaded connecting sleeve; 602. Internal threaded sleeve;

[0038] 7. Third energy storage mechanism; 701. Integrated drug dispensing nut;

[0039] 8. First drug dispensing mechanism; 801. Drive insert; 802. External threaded connecting rod;

[0040] 9. Second drug dispensing mechanism; 901. Drive screw; 902. Sliding connecting rod;

[0041] 10. Internal threaded connecting cylinder; 11. Split-type dispensing nut; 12. Drive spring; 13. Pressure sensor; 14. Dosage adjustment motor; 15. Support spring; 16. Medication reservoir; 17. Piston; 18. Push rod; 19. Motor base; 20. Drive motor; 21. Long lever; 22. Short lever; 23. Lever fixing pin; 24. Release button; 25. Leaf spring; 26. Circuit board; 27. Display screen; 28. Adjustment button; 29. ​​Battery; 30. Protective cover; 31. Transparent panel. Detailed Implementation

[0042] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0043] Please see Figure 1-14 A smart needle-free injector includes a housing with a bracket fixedly installed inside its cavity. The housing is composed of an upper housing 1 and a lower housing 2 snapped together. A motor base 19 is linearly slidably installed in the cavity of the thicker end of the bracket. A drive motor 20 is housed within the motor base 19, and the output end of the drive motor 20 drives an energy storage mechanism. The energy storage mechanism is always pressed against a drive spring 12 extending towards the drive motor 20, and the other end of the drive spring 12 abuts against a step inside the bracket cavity. Either end of the drive spring 12 also presses against a pressure sensor 13. A dose adjustment motor 14 is fixedly installed at the end of the energy storage mechanism near the drive motor 20. The output end of the dose adjustment motor 14 drives a drug dispensing mechanism, and the connecting rod of the drug dispensing mechanism is connected to a push rod 18. The push rod 18 is engaged into the inner annular groove at the end of the connecting rod by at least two axially extending elastic clips. The elastic clips are provided with protrusions adapted to engage with the inner annular grooves. A medicine reservoir 16 is connected to the slender end of the support. A piston 17 is installed inside the medicine reservoir 16, and the end of a push rod 18 away from the medicine dispensing mechanism is connected to the piston 17. The push rod 18 and the piston 17 are either completely fixedly connected or only axially fixed (allowing rotation). The lower outer casing 2 snaps onto the protective cover 30 of the medicine reservoir 16. Several locking and releasing components are installed together on the outer casing and the support, and the locking and releasing components are used to simultaneously lock the motor base 19 that has moved to the end of the support.

[0044] Each locking release assembly includes lever retaining pins 23 connected to brackets at both ends, and levers are connected to the lever retaining pins 23. One end of the lever is provided with a notch adapted to engage with the edge of the motor mount 19. A release button 24 adapted to the other end of the lever is radially slidably mounted on the housing. A leaf spring 25 extends from the end of the lever that contacts the release button 24, always pressing the end of the lever against the release button 24. The end of the leaf spring 25 away from the lever is coiled up, and the coiled end of the leaf spring 25 always slides against the extension of the bracket, which is jointly formed by the left bracket 3 and the right bracket 4. The cylindrical end of the leaf spring 25 is inserted into the lever along the axial direction of the cylinder.

[0045] The outer casing is equipped with two locking release components, and the two locking release components are respectively set as a long lever 21 and a short lever 22, so that the two release buttons 24 are misaligned, making it convenient for the thumb and index finger to press.

[0046] The inner wall of the support is provided with a step to prevent the medicine-dispensing nut from disengaging from the connecting rod. The external threaded sleeve 501 and the internal threaded sleeve 602 are not controlled by this step. The support is composed of a left support 3 and a right support 4 assembled together, and the left support 3 and the right support 4 are threadedly connected to the medicine storage cylinder 16. The edges of the contact parts of the left support 3 and the right support 4 are fixedly connected together by several bolts and nuts. The left support 3 and the right support 4 are both fixedly connected to the end of the lower outer shell 2 by two bolts that penetrate the lower outer shell 2. In the embodiment shown in the attached figure, when the medicine storage cylinder 16 is tightened between the left support 3 and the right support 4, the two elastic clips of the push rod 18 undergo elastic deformation and engage with the inner annular groove at the end of the connecting rod.

[0047] A battery 29 is fixedly mounted on the outer wall of the left bracket 3, and a circuit board 26 is fixedly mounted on the outer wall of the right bracket 4. The outer casing is inlaid with a display screen 27 adapted to the circuit board 26 and several adjustment buttons 28. The battery 29 powers the dose adjustment motor 14, the drive motor 20, and the circuit board 26. The display screen 27 is electrically connected to the circuit board 26. The adjustment buttons 28 are aligned with the buttons on the circuit board 26. The outer casing has a transparent panel 31 adapted to the display screen 27.

[0048] The dispensing nut has a through hole or slot parallel to its own axis for wiring the dose adjustment motor 14, and the bracket has a through hole for wiring the drive motor 20 and the dose adjustment motor 14. The split-type dispensing nut 11 has a through slot, while the integrated dispensing nut 701 has a through hole.

[0049] The inner wall of the support has several straight protrusions, and the outer protruding rings of the external threaded sleeve 501, internal threaded sleeve 602, and drug-retrieving nut are slidably connected to these straight protrusions. The inner wall of the support also has several straight grooves, and the motor base 19 has strip-shaped protrusions that fit these grooves. This design ensures that the outer protruding rings of the external threaded sleeve 501, internal threaded sleeve 602, and drug-retrieving nut can be slidably connected by straight protrusions. Alternatively, grooves can be designed on the support, with corresponding protrusions on the external threaded sleeve 501, internal threaded sleeve 602, and drug-retrieving nut.

[0050] Example 1

[0051] The energy storage mechanism is a first energy storage mechanism 5, which includes an internally threaded connecting cylinder 10 coaxially fixedly connected to the output end of the drive motor 20. An externally threaded sleeve 501 is threadedly connected to the internally threaded connecting cylinder 10. A split-type drug-dispensing nut 11 is slidably fitted inside the outer cavity of the externally threaded sleeve 501. Both the externally threaded sleeve 501 and the split-type drug-dispensing nut 11 are linearly slidably connected to the bracket. The outer convex ring of the externally threaded sleeve 501 abuts against one end of the drive spring 12. The split-type drug-dispensing nut 11 contacts a support spring 15 that is always pressed against the inner wall of the slender end of the bracket, and the elastic force of the support spring 15 is less than that of the drive spring 12. The elastic modulus of the drive spring 12 is more than ten times that of the support spring 15.

[0052] The drug dispensing mechanism is a first drug dispensing mechanism 8, which includes a drive insert 801 that is coaxially fixedly connected to the output end of the dose adjustment motor 14. The drive insert 801 is coaxially linearly slidably inserted with an external threaded connecting rod 802, and the external threaded connecting rod 802 is threadedly connected to the drug dispensing nut (split-type drug dispensing nut 11). The external threaded connecting rod 802 is coaxially rotatably engaged with the push rod 18.

[0053] Example 2

[0054] The energy storage mechanism is a second energy storage mechanism 6, which includes an externally threaded connecting sleeve 601 coaxially fixedly connected to the output end of the drive motor 20. An internally threaded sleeve 602 is threadedly connected to the externally threaded connecting sleeve 601. A split-type drug-dispensing nut 11 is slidably fitted inside the internally threaded sleeve 602. Both the internally threaded sleeve 602 and the split-type drug-dispensing nut 11 are linearly slidably connected to the bracket. The outer convex ring of the internally threaded sleeve 602 abuts against one end of the drive spring 12. The split-type drug-dispensing nut 11 contacts a support spring 15 that is always pressed against the inner wall of the slender end of the bracket, and the elastic force of the support spring 15 is less than that of the drive spring 12. The elastic modulus of the drive spring 12 is more than ten times that of the support spring 15.

[0055] The drug dispensing mechanism is a first drug dispensing mechanism 8, which includes a drive insert 801 that is coaxially fixedly connected to the output end of the dose adjustment motor 14. The drive insert 801 is coaxially linearly slidably inserted with an external threaded connecting rod 802, and the external threaded connecting rod 802 is threadedly connected to the drug dispensing nut (split-type drug dispensing nut 11). The external threaded connecting rod 802 is coaxially rotatably engaged with the push rod 18.

[0056] Example 3

[0057] The energy storage mechanism is a third energy storage mechanism 7, which includes an internally threaded connecting cylinder 10 that is coaxially fixedly connected to the output end of the drive motor 20. The internally threaded connecting cylinder 10 is threadedly connected to an integral medicine dispensing nut 701. The integral medicine dispensing nut 701 is linearly slidably connected to the bracket, and the outer convex ring of the integral medicine dispensing nut 701 abuts against one end of the drive spring 12.

[0058] The medication dispensing mechanism is a first medication dispensing mechanism 8, which includes a drive insert 801 that is coaxially fixedly connected to the output end of the dose adjustment motor 14. The drive insert 801 is coaxially linearly slidably inserted with an external threaded connecting rod 802, and the external threaded connecting rod 802 is threadedly connected to the medication dispensing nut (integrated medication dispensing nut 701). The external threaded connecting rod 802 is coaxially rotatably engaged with the push rod 18.

[0059] Example 4

[0060] The energy storage mechanism is a first energy storage mechanism 5, which includes an internally threaded connecting cylinder 10 coaxially fixedly connected to the output end of the drive motor 20. An externally threaded sleeve 501 is threadedly connected to the internally threaded connecting cylinder 10. A split-type drug-dispensing nut 11 is slidably fitted inside the outer cavity of the externally threaded sleeve 501. Both the externally threaded sleeve 501 and the split-type drug-dispensing nut 11 are linearly slidably connected to the bracket. The outer convex ring of the externally threaded sleeve 501 abuts against one end of the drive spring 12. The split-type drug-dispensing nut 11 contacts a support spring 15 that is always pressed against the inner wall of the slender end of the bracket, and the elastic force of the support spring 15 is less than that of the drive spring 12. The elastic modulus of the drive spring 12 is more than ten times that of the support spring 15.

[0061] The drug dispensing mechanism is a second drug dispensing mechanism 9, which includes a drive screw 901 that is coaxially fixedly connected to the output end of the dose adjustment motor 14. The drive screw 901 is coaxially threaded with a sliding connecting rod 902, and the sliding connecting rod 902 is linearly slidably connected to the drug dispensing nut (split-type drug dispensing nut 11). The sliding connecting rod 902 is coaxially rotatably engaged with the push rod 18.

[0062] Working principle:

[0063] Example 1

[0064] Before use (and after injection): At this time, the motor base 19 and the drive motor 20 are in the position closest to the pressure sensor 13. The drive spring 12 is spread out, one end of the drive spring 12 abuts against the pressure sensor 13, and the other end of the drive spring 12 abuts against the external threaded sleeve 501. The external threaded sleeve 501 is close to the split-type drug-receiving nut 11, so that the split-type drug-receiving nut 11 squeezes the support spring 15. At the same time, the split-type drug-receiving nut 11 pushes against the external threaded connecting rod 802, so that it pushes the push rod 18 to the leftmost end. The two leaf springs 25 are in a compressed state, and the short lever 22 and the long lever 21 are not stuck in the motor base 19.

[0065] When the motor base 19 is stuck before the drive spring 12 is compressed: the circuit board 26 controls the output end of the drive motor 20 to rotate, and the drive motor 20 drives the internal thread connecting cylinder 10 to rotate. Since the internal thread connecting cylinder 10 and the external thread sleeve 501 are threadedly engaged and the motor base 19 and the bracket are linearly slidingly engaged, the motor base 19 can only move towards the end of the bracket. After moving to the designated position, the circuit board 26 controls the output end of the drive motor 20 to stop rotating. The short lever 22 and the long lever 21 are respectively subjected to the elastic force of the two leaf springs 25, causing them to rotate around the lever fixing pin 23. The end notches of the short lever 22 and the long lever 21 are stuck on the edge of the motor base 19, so that the motor base 19 is temporarily locked.

[0066] When the motor base 19 is locked and the drive spring 12 is compressed but no medication is being dispensed: After the short lever 22 and the long lever 21 lock the motor base 19, the circuit board 26 controls the output end of the drive motor 20 to rotate the internal threaded connecting cylinder 10 in the reverse direction. Since the position of the motor base 19 is temporarily locked, the rotating internal threaded connecting cylinder 10 drives the external threaded sleeve 501 to move linearly towards the motor base 19. When the external threaded sleeve 501 moves, it compresses the drive spring 12. At the same time, the support spring 15 opens and squeezes the split-type medication dispensing nut 11, which moves together with the external threaded sleeve 501. (At the same time, when the drive motor 20 rotates and compresses the drive spring 12, the dosage adjustment motor 14 also moves according to C.) The PU sets a rotation speed to ensure that the external threaded connecting rod 802 remains stationary, or after the drive motor 20 has finished rotating, the split-type drug dispensing nut 11 is pushed to the rightmost position by the support spring 15, and the dose adjustment motor 14 rotates to move the external threaded connecting rod 802 to the leftmost end. After the drive spring 12 is compressed, it transmits the pressure to the pressure sensor 13 in the upper bracket. The pressure sensor 13 transmits the pressure information to the circuit board 26. The CPU processor on the circuit board 26 controls the drive motor 20 through the pressure information. When the pressure detected by the pressure sensor 13 reaches the preset value, the output end of the drive motor 20 stops rotating.

[0067] When the motor base 19 is locked and the drive spring 12 is compressed to extract the medicine: the circuit board 26 controls the drive insert 801 to rotate through the dose adjustment motor 14, thereby driving the external threaded connecting rod 802. Since the position of the split-type medicine extraction nut 11 is fixed and it is threadedly connected to the external threaded connecting rod 802, the external threaded connecting rod 802 rotates and retracts into the split-type medicine extraction nut 11. At the same time, the push rod 18 and the piston 17 move together with the split-type medicine extraction nut 11. The medicine storage cylinder 16 draws in the medicine liquid through the end opening. After the CPU processor of the circuit board 26 controls the drive insert 801 to rotate to complete the extraction of the specified dose of medicine through the dose adjustment motor 14, the dose adjustment motor 14 stops rotating.

[0068] During injection: After medication retrieval, press both release buttons 24 simultaneously. At this time, the short lever 22 and the long lever 21 are squeezed simultaneously, causing them to rotate around the lever fixing pin 23. The short lever 22 and the long lever 21 disengage from the motor base 19. The drive spring 12 quickly pushes the motor base 19, drive motor 20, internal threaded connecting sleeve 10, external threaded sleeve 501, split-type medication retrieval nut 11, drive insert 801, external threaded connecting rod 802, dose adjustment motor 14, push rod 18, and piston 17 together to squeeze the medication in the storage cylinder 16 forward to complete needle-free injection. (At this time, the support spring 15 is squeezed, and the two leaf springs 25 are squeezed).

[0069] Example 2

[0070] Before use (and after injection): At this time, the motor base 19 and the drive motor 20 are in the position closest to the pressure sensor 13. The drive spring 12 is spread out, one end of the drive spring 12 abuts against the pressure sensor 13, and the other end of the drive spring 12 abuts against the internal thread sleeve 602. The internal thread sleeve 602 is close to the split-type drug-receiving nut 11, so that the split-type drug-receiving nut 11 squeezes the support spring 15. At the same time, the split-type drug-receiving nut 11 pushes against the external thread connecting rod 802, so that it pushes the push rod 18 to the leftmost end. The two leaf springs 25 are in a compressed state, and the short lever 22 and the long lever 21 are not stuck in the motor base 19.

[0071] When the motor base 19 is stuck before the drive spring 12 is compressed: the circuit board 26 controls the output end of the drive motor 20 to rotate, and the drive motor 20 drives the external threaded connecting sleeve 601 to rotate. Since the external threaded connecting sleeve 601 and the internal threaded sleeve 602 are threadedly engaged and the motor base 19 is linearly slidingly engaged with the bracket, the motor base 19 can only move towards the end of the bracket. After moving to the designated position, the circuit board 26 controls the output end of the drive motor 20 to stop rotating. The short lever 22 and the long lever 21 are respectively subjected to the elastic force of the two leaf springs 25, causing them to rotate around the lever fixing pin 23. The end notches of the short lever 22 and the long lever 21 are stuck on the edge of the motor base 19, so that the motor base 19 is temporarily locked.

[0072] When the motor base 19 is locked and the drive spring 12 is compressed but no medication is being dispensed: After the short lever 22 and the long lever 21 lock the motor base 19, the circuit board 26 controls the output end of the drive motor 20 to rotate the external threaded connecting sleeve 601 in the reverse direction. Since the position of the motor base 19 is temporarily locked, the rotating external threaded connecting sleeve 601 drives the internal threaded sleeve 602 to move linearly towards the motor base 19. When the internal threaded sleeve 602 moves, it compresses the drive spring 12. At the same time, the support spring 15 opens and squeezes the split-type medication dispensing nut 11, which moves together with the internal threaded sleeve 602. (At the same time, when the drive motor 20 rotates and compresses the drive spring 12, the dosage adjustment motor 14 also...) Rotate at the speed set by the CPU to ensure that the external threaded connecting rod 802 remains stationary, or wait until the drive motor 20 has finished rotating, and the split-type drug dispensing nut 11 is pushed to the rightmost position by the support spring 15, then the dose adjustment motor 14 rotates to move the external threaded connecting rod 802 to the leftmost end. After the drive spring 12 is compressed, it transmits the pressure to the pressure sensor 13 in the upper bracket. The pressure sensor 13 transmits the pressure information to the circuit board 26. The CPU processor on the circuit board 26 controls the drive motor 20 through the pressure information. When the pressure detected by the pressure sensor 13 reaches the preset value, the output end of the drive motor 20 stops rotating.

[0073] When the motor base 19 is locked and the drive spring 12 is compressed to extract the medicine: the circuit board 26 controls the drive insert 801 to rotate through the dose adjustment motor 14, thereby driving the external threaded connecting rod 802. Since the position of the split-type medicine extraction nut 11 is fixed and it is threadedly connected to the external threaded connecting rod 802, the external threaded connecting rod 802 rotates and retracts into the split-type medicine extraction nut 11. At the same time, the push rod 18 and the piston 17 move together with the split-type medicine extraction nut 11. The medicine storage cylinder 16 draws in the medicine liquid through the end opening. After the CPU processor of the circuit board 26 controls the drive insert 801 to rotate to complete the extraction of the specified dose of medicine through the dose adjustment motor 14, the dose adjustment motor 14 stops rotating.

[0074] During injection: After medication retrieval, press both release buttons 24 simultaneously. At this time, the short lever 22 and the long lever 21 are squeezed simultaneously, causing them to rotate around the lever fixing pin 23. The short lever 22 and the long lever 21 disengage from the motor base 19. The drive spring 12 quickly pushes the motor base 19, drive motor 20, external threaded connecting sleeve 601, internal threaded sleeve 602, split-type medication retrieval nut 11, drive insert 801, external threaded connecting rod 802, dose adjustment motor 14, push rod 18, and piston 17 together to squeeze the medication in the storage cylinder 16 forward to complete needle-free injection. (At this time, the support spring 15 is squeezed, and the two leaf springs 25 are squeezed).

[0075] Example 3

[0076] Before use (and after injection): At this time, the motor base 19 and the drive motor 20 are in the position closest to the pressure sensor 13. The drive spring 12 is spread out, one end of the drive spring 12 abuts against the pressure sensor 13, and the other end of the drive spring 12 abuts against the integrated drug-retrieving nut 701. The integrated drug-retrieving nut 701 simultaneously abuts against the external threaded connecting rod 802, causing it to push the push rod 18 to the leftmost end. The two leaf springs 25 are in a compressed state, and the short lever 22 and the long lever 21 are not stuck in the motor base 19.

[0077] When the motor base 19 is stuck before the drive spring 12 is compressed: the circuit board 26 controls the output end of the drive motor 20 to rotate, and the drive motor 20 drives the internal thread connecting cylinder 10 to rotate. Since the internal thread connecting cylinder 10 is threadedly engaged with the integrated medicine nut 701 and the motor base 19 is linearly slidingly engaged with the bracket, the motor base 19 can only move towards the end of the bracket. After moving to the designated position, the circuit board 26 controls the output end of the drive motor 20 to stop rotating. The short lever 22 and the long lever 21 are respectively subjected to the elastic force of the two leaf springs 25, causing them to rotate around the lever fixing pin 23. The end notches of the short lever 22 and the long lever 21 are stuck on the edge of the motor base 19, so that the motor base 19 is temporarily locked.

[0078] When the motor base 19 is locked and the drive spring 12 is compressed but no medication is being taken out: After the short lever 22 and the long lever 21 lock the motor base 19, the circuit board 26 controls the output end of the drive motor 20 to rotate the internal threaded connecting cylinder 10 in the opposite direction. Since the position of the motor base 19 is temporarily locked, the rotating internal threaded connecting cylinder 10 drives the integrated medication taking nut 701 to move linearly towards the motor base 19 (at the same time, when the drive motor 20 rotates and compresses the drive spring 12, the dose adjustment motor 14 also rotates according to the speed set by the CPU to ensure that the external threaded connecting rod 802 remains stationary, or wait until the drive motor 20 has finished rotating and the integrated medication taking nut 701 is already in the rightmost position, and the dose adjustment motor 14 rotates to move the external threaded connecting rod 802 to the leftmost end). After the drive spring 12 is compressed, it transmits the pressure to the pressure sensor 13 in the upper bracket. The pressure sensor 13 transmits the pressure information to the circuit board 26. The CPU processor on the circuit board 26 controls the drive motor 20 through the pressure information. When the pressure detected by the pressure sensor 13 reaches the preset value, the output end of the drive motor 20 stops rotating.

[0079] When the motor base 19 is locked and the drive spring 12 is compressed to extract the medicine: the circuit board 26 controls the drive insert 801 to rotate through the dose adjustment motor 14, thereby driving the external threaded connecting rod 802. Since the position of the integrated medicine extraction nut 701 is fixed and it is threadedly connected to the external threaded connecting rod 802, the external threaded connecting rod 802 rotates and retracts into the integrated medicine extraction nut 701. At the same time, the push rod 18 and the piston 17 move together with the integrated medicine extraction nut 701. The medicine storage cylinder 16 draws in the medicine liquid through the end opening. After the CPU processor of the circuit board 26 controls the drive insert 801 to rotate to complete the extraction of the specified dose of medicine through the dose adjustment motor 14, the dose adjustment motor 14 stops rotating.

[0080] During injection: After medication retrieval, press both release buttons 24 simultaneously. At this time, the short lever 22 and the long lever 21 are squeezed simultaneously, causing them to rotate around the lever fixing pin 23. The short lever 22 and the long lever 21 disengage from the motor base 19. The drive spring 12 quickly pushes the motor base 19, drive motor 20, internal threaded connecting cylinder 10, integrated medication retrieval nut 701, drive insert 801, external threaded connecting rod 802, dose adjustment motor 14, push rod 18, and piston 17 forward to squeeze the medication in the storage cylinder 16 to complete needle-free injection. (At this time, the two leaf springs 25 are squeezed).

[0081] Example 4

[0082] Before use (and after injection): At this time, the motor base 19 and the drive motor 20 are in the position closest to the pressure sensor 13. The drive spring 12 is spread out, one end of the drive spring 12 abuts against the pressure sensor 13, and the other end of the drive spring 12 abuts against the outer threaded sleeve 501. The outer threaded sleeve 501 is close to the split-type drug-dispensing nut 11, so that the split-type drug-dispensing nut 11 squeezes the support spring 15. The dose adjustment motor 14 pushes the push rod 18 to the leftmost end through the drive screw 901 and the sliding connecting rod 902. The two leaf springs 25 are in a compressed state, and the short lever 22 and the long lever 21 are not stuck in the motor base 19.

[0083] When the motor base 19 is stuck before the drive spring 12 is compressed: the circuit board 26 controls the output end of the drive motor 20 to rotate, and the drive motor 20 drives the internal thread connecting cylinder 10 to rotate. Since the internal thread connecting cylinder 10 and the external thread sleeve 501 are threadedly engaged and the motor base 19 and the bracket are linearly slidingly engaged, the motor base 19 can only move towards the end of the bracket. After moving to the designated position, the circuit board 26 controls the output end of the drive motor 20 to stop rotating. The short lever 22 and the long lever 21 are respectively subjected to the elastic force of the two leaf springs 25, causing them to rotate around the lever fixing pin 23. The end notches of the short lever 22 and the long lever 21 are stuck on the edge of the motor base 19, so that the motor base 19 is temporarily locked.

[0084] When the motor base 19 is locked and the drive spring 12 is compressed but no medication is being dispensed: After the short lever 22 and the long lever 21 lock the motor base 19, the circuit board 26 controls the output end of the drive motor 20 to rotate the internal threaded connecting cylinder 10 in the reverse direction. Since the position of the motor base 19 is temporarily locked, the rotating internal threaded connecting cylinder 10 drives the external threaded sleeve 501 to move linearly towards the motor base 19. When the external threaded sleeve 501 moves, it compresses the drive spring 12. At the same time, the support spring 15 opens and squeezes the split-type medication dispensing nut 11, which moves together with the external threaded sleeve 501. (At the same time, when the drive motor 20 rotates and compresses the drive spring 12, the dosage adjustment motor 14 also moves accordingly.) The CPU sets a rotation speed to ensure that the sliding connecting rod 902 remains stationary, or after the drive motor 20 has finished rotating, the split-type drug dispensing nut 11 is pushed to the rightmost position by the support spring 15, and the dose adjustment motor 14 rotates to move the sliding connecting rod 902 to the leftmost end. After the drive spring 12 is compressed, it transmits the pressure to the pressure sensor 13 in the upper bracket. The pressure sensor 13 transmits the pressure information to the circuit board 26. The CPU processor on the circuit board 26 controls the drive motor 20 through the pressure information. When the pressure detected by the pressure sensor 13 reaches the preset value, the output end of the drive motor 20 stops rotating.

[0085] When the motor base 19 is locked and the drive spring 12 is compressed to extract the medicine: the circuit board 26 controls the drive screw 901 to rotate through the dose adjustment motor 14, thereby driving the sliding connecting rod 902. Since the position of the split-type medicine extraction nut 11 is fixed and it is linearly slidably connected to the sliding connecting rod 902, the sliding connecting rod 902 retracts linearly into the split-type medicine extraction nut 11. At the same time, the push rod 18 and the piston 17 move together with the split-type medicine extraction nut 11. The medicine storage cylinder 16 draws in the medicine liquid through the end opening. After the CPU processor of the circuit board 26 controls the drive screw 901 to rotate to complete the extraction of the specified dose of medicine through the dose adjustment motor 14, the dose adjustment motor 14 stops rotating.

[0086] During injection: After medication retrieval, press both release buttons 24 simultaneously. At this time, the short lever 22 and the long lever 21 are squeezed simultaneously, causing them to rotate around the lever fixing pin 23. The short lever 22 and the long lever 21 disengage from the motor base 19. The drive spring 12 quickly pushes the motor base 19, drive motor 20, internal threaded connecting sleeve 10, external threaded sleeve 501, split-type medication retrieval nut 11, drive screw 901, sliding connecting rod 902, dose adjustment motor 14, push rod 18, and piston 17 together to squeeze the medication in the storage cylinder 16 forward to complete needle-free injection. (At this time, the support spring 15 is squeezed, and the two leaf springs 25 are squeezed).

[0087] It should be noted that the above content merely illustrates the technical concept of this utility model and cannot be used to limit the scope of protection of this utility model. For those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and all such improvements and modifications fall within the scope of protection of the claims of this utility model.

Claims

1. A smart needle-free injector, comprising a housing, characterized in that, A bracket is fixedly installed in the inner cavity of the outer shell. A motor base (19) is linearly slidably installed in the inner cavity of the thicker end of the bracket. A drive motor (20) is sleeved inside the motor base (19), and the output end of the drive motor (20) drives an energy storage mechanism. The energy storage mechanism is always pressed against a drive spring (12) extending towards the drive motor (20), and the other end of the drive spring (12) abuts against the step inside the bracket cavity. Either end of the drive spring (12) also abuts against a pressure sensor (13). The drug-dispensing nut of the energy storage mechanism is close to the drive motor. A dose adjustment motor (14) is fixedly installed at one end of the machine (20). The output end of the dose adjustment motor (14) drives a drug dispensing mechanism. The connecting rod of the drug dispensing mechanism is connected to a push rod (18). A drug storage cylinder (16) is connected to the slender end of the bracket. A piston (17) is installed inside the drug storage cylinder (16). The end of the push rod (18) away from the drug dispensing mechanism is connected to the piston (17). Several locking and releasing components are installed together on the outer shell and the bracket. The locking and releasing components are used to simultaneously lock the motor seat (19) that moves to the end of the bracket.

2. The intelligent needle-free injector according to claim 1, characterized in that, The energy storage mechanism is a first energy storage mechanism (5). The first energy storage mechanism (5) includes an internally threaded connecting cylinder (10) that is coaxially fixedly connected to the output end of the drive motor (20). The internally threaded connecting cylinder (10) is threadedly connected to an externally threaded sleeve (501). A split-type medicine-retrieving nut (11) is slidably sleeved in the inner cavity of the externally threaded sleeve (501). Both the externally threaded sleeve (501) and the split-type medicine-retrieving nut (11) are linearly slidably connected to the bracket. The outer convex ring of the externally threaded sleeve (501) abuts against one end of the drive spring (12). The split-type medicine-retrieving nut (11) contacts a support spring (15) that is always pressed against the inner wall of the slender end of the bracket. The elastic force of the support spring (15) is less than that of the drive spring (12).

3. The intelligent needle-free injector according to claim 1, characterized in that, The energy storage mechanism is a second energy storage mechanism (6). The second energy storage mechanism (6) includes an external threaded connecting sleeve (601) that is coaxially fixedly connected to the output end of the drive motor (20). The external threaded connecting sleeve (601) is threadedly connected to an internal threaded sleeve (602). A split-type drug-retrieving nut (11) is slidably sleeved in the inner cavity of the internal threaded sleeve (602). Both the internal threaded sleeve (602) and the split-type drug-retrieving nut (11) are linearly slidably connected to the bracket. The outer convex ring of the internal threaded sleeve (602) abuts against one end of the drive spring (12). The split-type drug-retrieving nut (11) contacts a support spring (15) that is always pressed against the inner wall of the slender end of the bracket. The elastic force of the support spring (15) is less than that of the drive spring (12).

4. The intelligent needle-free injector according to claim 1, characterized in that, The energy storage mechanism is a third energy storage mechanism (7). The third energy storage mechanism (7) includes an internally threaded connecting cylinder (10) that is coaxially fixedly connected to the output end of the drive motor (20). The internally threaded connecting cylinder (10) is threadedly connected to an integral medicine-retrieving nut (701). The integral medicine-retrieving nut (701) is linearly slidably connected to the bracket. The outer convex ring of the integral medicine-retrieving nut (701) abuts against one end of the drive spring (12).

5. The intelligent needle-free injector according to claim 1, characterized in that, The drug dispensing mechanism is a first drug dispensing mechanism (8). The first drug dispensing mechanism (8) includes a drive insert (801) that is coaxially fixedly connected to the output end of the dose adjustment motor (14). The drive insert (801) is coaxially linearly slidably inserted with an external threaded connecting rod (802), and the external threaded connecting rod (802) is threadedly connected to the drug dispensing nut. The external threaded connecting rod (802) is coaxially rotated and snapped with the push rod (18).

6. The intelligent needle-free injector according to claim 1, characterized in that, The drug dispensing mechanism is a second drug dispensing mechanism (9). The second drug dispensing mechanism (9) includes a drive screw (901) that is coaxially fixedly connected to the output end of the dose adjustment motor (14). The drive screw (901) is coaxially threaded with a sliding connecting rod (902), and the sliding connecting rod (902) is linearly slidably connected to the drug dispensing nut. The sliding connecting rod (902) is coaxially rotatably engaged with the push rod (18).

7. The intelligent needle-free injector according to claim 1, characterized in that, Each of the locking release components includes a lever fixing pin (23) connected to the bracket at both ends. The lever fixing pin (23) is connected to a lever. One end of the lever is provided with a notch adapted to lock the edge of the motor seat (19). The housing is radially slidably mounted with a release button (24) adapted to the other end of the lever. One end of the lever that contacts the release button (24) extends with a leaf spring (25) that always pushes the end of the lever against the release button (24). The end of the leaf spring (25) away from the lever is rolled up, and the rolled-up end of the leaf spring (25) always slides against the extension of the bracket.

8. The intelligent needle-free injector according to claim 7, characterized in that, The outer casing is equipped with two locking release components, and the two locking release components respectively set the lever as a long lever (21) and a short lever (22).

9. The intelligent needle-free injector according to claim 1, characterized in that, The inner wall of the bracket is provided with a step to restrict the disengagement of the medicine nut from the connecting rod. The bracket is composed of a left bracket (3) and a right bracket (4) assembled together. The left bracket (3) and the right bracket (4) are threadedly connected to the medicine storage cylinder (16).

10. The intelligent needle-free injector according to claim 1, characterized in that, The drug-feeding nut is provided with a through hole or through slot parallel to its own axis for wiring the dose adjustment motor (14), and the bracket is provided with a through hole for wiring the drive motor (20) and the dose adjustment motor (14).

Images