Intelligent needleless injector

Abstract

The invention discloses an intelligent needleless injector, and particularly relates to the technical field of needleless injection.The intelligent needleless injector comprises an outer shell, a support is installed in an inner cavity of the outer shell, a motor base is linearly and slidably installed in an inner cavity of the thick end of the support, a driving motor is arranged in the motor base in a sleeved mode, and the output end of the driving motor drives an energy storage mechanism; the energy storage mechanism always abuts against a driving spring extending in the direction of the driving motor, the other end of the driving spring abuts against a step of an inner cavity of the support, any end of the driving spring further abuts against the pressure sensor, a dose adjusting motor is fixedly installed at the end, close to the driving motor, of a medicine taking nut of the energy storage mechanism, and the output end of the dose adjusting motor drives a medicine taking mechanism. A connecting rod of the medicine taking mechanism is connected with a push rod, the long and thin end of the support is externally connected with a medicine storage cylinder, and the end, away from the medicine taking mechanism, of the push rod is connected with a piston.

Description

Technical Field

[0001] The present invention belongs to the technical field of needle-free injection, and in particular relates to an intelligent needle-free injector. Background Art

[0002] Needle-free injection, also known as jet injection, utilizes instantaneous high pressure generated by a power source to force the drug (liquid or lyophilized powder) in a syringe through a nozzle, forming a high-speed, high-pressure jet (typically greater than 100 m / s). This jet stream allows the drug to penetrate the outer layer of the skin and reach the subcutaneous and intradermal tissue layers, releasing its therapeutic effects. There are various types of injection power sources, one of which is a spring. Existing spring-driven needle-free injection systems experience a decrease in spring force after long-term use, resulting in a decrease in injection pressure, an inability to penetrate the skin, and a high risk of injection failure.

[0003] For example, the existing announcement number is: CN114159649A, which is a spring motor composite power needle-free syringe, which "includes a motor, an energy storage drive, a striking member, a spring, an ampoule, and an injection push rod installed in the ampoule. The spring is sleeved on the outer periphery of the striking member, and the motor is used to drive the energy storage drive member to operate by reverse rotation, driving the striking member to move from the first position to the second position, causing the spring to deform and store energy. The spring releases the stored energy at the second position to return the striking member from the second position to the first position. While the spring is releasing the stored energy, the motor drives the energy storage drive member to move by forward rotation, driving the striking member to return from the second position to the first position, so as to strike the injection push rod in the ampoule to achieve injection." This application uses spring energy storage, and the spring elasticity will decrease after long-term use, which greatly increases the probability of needle-free injection failure. Therefore, a new type of intelligent needle-free syringe is needed. Summary of the Invention

[0004] In order to solve the above problems, the present invention discloses an intelligent needle-free syringe.

[0005] To achieve the above object, the technical solution of the present invention is as follows:

[0006] The cam is secured to the inner wall of the housing and is adapted to engage the pump, wherein the cam is secured to the outer wall of the housing and is adapted to engage the pump when the cam is engaged.

[0007] As a preferred technical solution of the present invention, the energy storage mechanism is a first energy storage mechanism, which includes an internal threaded connecting tube coaxially fixedly connected to the output end of the driving motor, the internal threaded connecting tube is threadedly connected to an external threaded sleeve, the inner cavity sliding sleeve of the external threaded sleeve is provided with a split medicine dispensing nut, the external threaded sleeve and the split medicine dispensing nut are both linearly slidably connected to the bracket, the outer convex ring of the external threaded sleeve presses against one end of the driving spring, and the split medicine dispensing nut contacts a support spring that always presses against the inner wall of the slender end of the bracket, and the elastic force of the support spring is smaller than that of the driving spring.

[0008] As a preferred technical solution of the present invention, the energy storage mechanism is a second energy storage mechanism, which includes an externally threaded connecting tube coaxially fixedly connected to the output end of the driving motor, the externally threaded connecting tube is threadedly connected to an internally threaded sleeve, the inner cavity sliding sleeve of the internally threaded sleeve is provided with a split medicine dispensing nut, the internally threaded sleeve and the split medicine dispensing nut are both linearly slidably connected to the bracket, the outer convex ring of the internally threaded sleeve presses against one end of the driving spring, and the split medicine dispensing nut contacts a support spring that always presses against the inner wall of the slender end of the bracket, and the elastic force of the support spring is smaller than that of the driving spring.

[0009] As a preferred technical solution of the present invention, the energy storage mechanism is a third energy storage mechanism, and the third energy storage mechanism includes an internal threaded connecting cylinder coaxially fixedly connected to the output end of the driving motor, and the internal threaded connecting cylinder is threadedly connected to an integrated medicine dispensing nut, and the integrated medicine dispensing nut is linearly slidably connected to the bracket, and the outer convex ring of the integrated medicine dispensing nut is against one end of the driving spring.

[0010] As a preferred technical solution of the present invention, the medicine dispensing mechanism is a first medicine dispensing mechanism, which includes a driving strip coaxially fixedly connected to the output end of the dosage adjustment motor, the driving strip coaxially linearly slidingly plugged with an externally threaded connecting rod, and the externally threaded connecting rod is threadedly connected to the medicine dispensing nut, and the externally threaded connecting rod is coaxially rotated and clamped with the push rod.

[0011] As a preferred technical solution of the present invention, the medicine dispensing mechanism is a second medicine dispensing mechanism, which includes a driving screw coaxially fixedly connected to the output end of the dose adjustment motor, the driving screw is coaxially threadedly connected to a sliding connecting rod, and the sliding connecting rod is linearly slidably connected to the medicine dispensing nut, and the sliding connecting rod is coaxially rotated and clamped with the push rod.

[0012] As a preferred technical solution of the present invention, 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 clamp the edge of the motor seat, the outer shell is radially slidably installed with a release button adapted to the other end of the lever, and the end of the lever contacting the release button extends with a leaf spring that always pushes the end of the lever toward the release button, the leaf spring is rolled up away from the end of the lever, and the rolled-up end of the leaf spring always slides tightly against the extension of the bracket.

[0013] As a preferred technical solution of the present invention, the outer shell is equipped with two locking and releasing assemblies, and the two locking and releasing assemblies respectively set the levers as a long lever and a short lever.

[0014] As a preferred technical solution of the present invention, the inner wall of the bracket is provided with a step to limit the medicine removal nut from detaching from the connecting rod. The bracket is composed of a left bracket and a right bracket spliced together, and the left bracket and the right bracket are jointly threadedly connected to the medicine storage cartridge.

[0015] As a preferred technical solution of the present invention, the medicine dispensing nut is provided with a through hole or through groove parallel to its own axis and used 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 the present invention are:

[0017] 1. This application is equipped with a pressure sensor. When the drive motor compresses the drive spring to accumulate force, the initial injection pressure can be preset according to clinical data. Even if the elastic force of the drive spring decreases after long-term use, the initial injection pressure can 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 medicine dispensing mechanism move together with the push rod and piston at any time, which makes the inertia of the injection components larger, the pressure drop of needle-free injection is slower, and the injection of liquid medicine is stable;

[0019] 3. This application uses a dosage adjustment motor to drive the push rod to absorb medicine, and the medicine is taken accurately and reliably. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an overall exploded view of the initial state of the first embodiment of the present invention;

[0021] Figure 2 An exploded view of the left bracket, right bracket, first energy storage mechanism, first medicine dispensing mechanism, internally threaded connecting cylinder, split medicine dispensing nut, drive spring, pressure sensor, support spring, medicine storage cartridge, motor base, drive motor, long lever, lever fixing pin, and release button in the initial state of the first embodiment of the present invention;

[0022] Figure 3 This is an exploded view of the left bracket, right bracket, circuit board, display screen and battery in accordance with the first embodiment of the present invention;

[0023] Figure 4 A partial cross-sectional view of the left bracket, first energy storage mechanism, first medicine dispensing mechanism, internally threaded connecting cylinder, split medicine dispensing nut, drive spring, pressure sensor, dose adjustment motor, support spring, medicine storage cartridge, 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 the present invention;

[0024] Figure 5 This is an exploded view of the external thread sleeve, drive insert, external thread connecting rod, internal thread connecting cylinder, split medicine dispensing nut, dose adjustment motor and push rod in Example 1 of the present invention;

[0025] Figure 6 This is an overall cross-sectional view of the motor base after it is stuck and before the drive spring is compressed, with the protective cover and the right bracket removed;

[0026] Figure 7 This is an overall cross-sectional view of the motor base of the first embodiment of the present invention, with the protective cover and the right bracket removed and the drive spring compressed but no medicine is taken;

[0027] Figure 8 This is an overall cross-sectional view of the embodiment 1 of the present invention, with the protective cover and the right bracket removed after the motor base is stuck and the drive spring is compressed and medicine is taken out;

[0028] Figure 9A partial cross-sectional view of the left bracket, second energy storage mechanism, first medicine dispensing mechanism, split medicine dispensing nut, drive spring, pressure sensor, support spring, medicine storage cartridge, motor base, drive motor, long lever, lever fixing pin, release button, and leaf spring in the initial state of the second embodiment of the present invention;

[0029] Figure 10 This is an exploded view of the externally threaded connecting cylinder, internally threaded sleeve, drive insert, externally threaded connecting rod, split medicine dispensing nut, and dosage adjustment motor in the initial state of the second embodiment of the present invention;

[0030] Figure 11 A partial cross-sectional view of the left bracket, the third energy storage mechanism, the first medicine dispensing mechanism, the internally threaded connecting tube, the drive spring, the pressure sensor, the medicine storage cartridge, the motor base, the drive motor, the long lever, the lever fixing pin, the release button, and the leaf spring in the initial state of the third embodiment of the present invention;

[0031] Figure 12 This is an exploded view of the integrated medicine dispensing nut, drive insert, externally threaded connecting rod, internally threaded connecting cylinder, and dose adjustment motor in the initial state of embodiment 3 of the present invention;

[0032] Figure 13 A partial cross-sectional view of the left bracket, first energy storage mechanism, second medicine dispensing mechanism, internally threaded connecting cylinder, split medicine dispensing nut, drive spring, pressure sensor, dose adjustment motor, support spring, medicine storage cartridge, motor base, drive motor, long lever, lever fixing pin, release button, and leaf spring in the initial state of the fourth embodiment of the present invention;

[0033] Figure 14 This is an exploded view of the external thread sleeve, drive screw, sliding connecting rod, internal thread connecting cylinder, split medicine dispensing nut and dose adjustment motor in the initial state of embodiment 4 of the present invention.

[0034] List of Figure Symbols:

[0035] 1. Upper housing; 2. Lower housing; 3. Left bracket; 4. Right bracket;

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

[0037] 6. Second energy storage mechanism; 601. Externally threaded connecting cylinder; 602. Internally threaded sleeve;

[0038] 7. Third energy storage mechanism; 701. Integrated medicine removal nut;

[0039] 8. First medicine dispensing mechanism; 801. Driving insert; 802. Externally threaded connecting rod;

[0040] 9. Second medicine dispensing mechanism; 901. Driving screw; 902. Sliding connecting rod;

[0041] 10. Internal thread connecting cylinder; 11. Split medicine dispensing nut; 12. Drive spring; 13. Pressure sensor; 14. Dose adjustment motor; 15. Support spring; 16. Medicine storage cartridge; 17. Piston; 18. Push rod; 19. Motor seat; 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 DESCRIPTION

[0042] The present invention will be further described 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 used to limit the scope of the present invention.

[0043] See also Figure 1-14 A smart needle-free syringe includes an outer shell, in which a bracket is fixedly installed in the inner cavity of the outer shell. The outer shell is composed of an upper outer shell 1 and a lower outer shell 2 that are clamped together. A motor seat 19 is linearly slidably installed in the inner cavity of the thick end of the bracket. A drive motor 20 is sleeved in the motor seat 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 in the direction of the drive motor 20, and the other end of the drive spring 12 presses against the step in the inner cavity of the bracket. Either end of the drive spring 12 also presses against a pressure sensor 13, and a dose adjustment motor 14 is fixedly installed on the drug dispensing nut of the energy storage mechanism near one end of 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 inserted into the inner ring groove at the end of the connecting rod through at least two axially extending elastic clips. The elastic clip is provided with a protrusion adapted to fit into the inner ring groove. The elongated end of the bracket is connected to a drug storage cartridge 16, which houses a piston 17. A push rod 18 is connected to the piston 17 at the end away from the drug dispensing mechanism. The push rod 18 and piston 17 are either completely fixed or only axially fixed (rotation is permitted). The lower housing 2 is secured to a protective cap 30 covering the drug storage cartridge 16. The outer housing and bracket are jointly equipped with several locking and release assemblies, which are used to simultaneously lock the motor base 19 that moves to the end of the bracket.

[0044] Each lock release assembly includes a lever fixing pin 23 connected to a bracket at both ends. Lever fixing pin 23 is connected to a lever. One end of the lever is provided with a notch that fits over the edge of the motor base 19. A release button 24 is radially mounted on the outer casing, which fits over the other end of the lever. Extending from the end of the lever that contacts the release button 24 is a leaf spring 25 that constantly pushes the end of the lever toward the release button 24. The leaf spring 25 is coiled away from the end of the lever, and the coiled end of the leaf spring 25 constantly slides against an extension of the bracket, which is formed by the left and right brackets 3 and 4. The cylindrical end of the leaf spring 25 is inserted into the lever along the axial direction of the cylinder.

[0045] The outer shell is equipped with two locking and releasing assemblies, and the levers of the two locking and releasing assemblies are respectively set as a long lever 21 and a short lever 22, so as to stagger the two release buttons 24 to facilitate pressing by the thumb and index finger.

[0046] The inner wall of the bracket is provided with a step that limits the medicine-taking nut from being separated from the connecting rod, and the outer thread sleeve 501 and the inner thread sleeve 602 are not controlled by the step. The bracket is composed of a left bracket 3 and a right bracket 4 spliced together, and the left bracket 3 and the right bracket 4 are threadedly connected to the medicine storage cartridge 16. The left bracket 3 and the right bracket 4 are fixedly connected together by a plurality of bolts and nuts to the edges of the contact parts of the left bracket 3 and the right bracket 4. The left bracket 3 and the right bracket 4 are both fixedly connected to the end of the lower shell 2 by two bolts passing through the lower shell 2. In the embodiment of the accompanying drawings, when the medicine storage cartridge 16 is tightened and installed between the left bracket 3 and the right bracket 4, the two elastic clips of the push rod 18 are elastically deformed and then snapped into the inner ring 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 shell is embedded with a display screen 27 and several adjustment buttons 28 that are compatible with the circuit board 26. 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 align with the buttons on the circuit board 26. The outer shell is also provided with a transparent panel 31 that is compatible with the display screen 27.

[0048] The medicine dispensing nut is provided with a through hole or 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. The split medicine dispensing nut 11 is provided with a slot, and the integrated medicine dispensing nut 701 is provided with a through hole.

[0049] The inner cavity wall of the support is convex with several straight lines, and the outer convex ring of the outer screw sleeve 501, the inner thread sleeve 602 and the medicine nut is slidably connected with the straight lines. The inner cavity wall of the support is concave with several straight grooves, and the motor base 19 is provided with a strip-shaped protrusion that adapts to the straight grooves. Such a design ensures that the outer convex ring of the outer screw sleeve 501, the inner thread sleeve 602 and the medicine nut can be slidably connected with the straight lines. Another way is to design a groove on the support, and design corresponding protrusions for the outer screw sleeve 501, the inner thread sleeve 602 and the medicine nut.

[0050] Example 1

[0051] The energy storage mechanism is a first energy storage mechanism 5, which includes an internal threaded connection tube 10 coaxially fixedly connected to the output end of the drive motor 20, and the internal threaded connection tube 10 is threadedly connected to an external threaded sleeve 501. The inner cavity sliding sleeve of the external threaded sleeve 501 is provided with a split medicine dispensing nut 11, and the external threaded sleeve 501 and the split medicine dispensing nut 11 are both linearly slidably connected to the bracket. The outer convex ring of the external threaded sleeve 501 is against one end of the drive spring 12, and the split medicine dispensing nut 11 is in contact with 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 medication dispensing mechanism is the first medication dispensing mechanism 8, which includes a drive rod 801 coaxially fixedly connected to the output end of the dose adjustment motor 14. An externally threaded connecting rod 802 is coaxially and linearly inserted into the drive rod 801. The externally threaded connecting rod 802 is threadedly connected to the medication dispensing nut (split medication dispensing nut 11), and the externally threaded connecting rod 802 is coaxially and 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 connection tube 601 coaxially fixedly connected to the output end of the drive motor 20, and the externally threaded connection tube 601 is threadedly connected to an internally threaded sleeve 602. The internally threaded sleeve 602 is provided with a split medicine dispensing nut 11 in the inner cavity sliding sleeve, and the internally threaded sleeve 602 and the split medicine dispensing nut 11 are both 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, and the split medicine dispensing nut 11 is in contact with 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 medication dispensing mechanism is the first medication dispensing mechanism 8, which includes a drive rod 801 coaxially fixedly connected to the output end of the dose adjustment motor 14. An externally threaded connecting rod 802 is coaxially and linearly inserted into the drive rod 801. The externally threaded connecting rod 802 is threadedly connected to the medication dispensing nut (split medication dispensing nut 11), and the externally threaded connecting rod 802 is coaxially and 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 barrel 10 coaxially fixedly connected to the output end of the drive motor 20. The internally threaded connecting barrel 10 is threadedly connected to an integrated drug dispensing nut 701. The integrated drug dispensing nut 701 is linearly slidably connected to the bracket, and the outer protruding ring of the integrated drug dispensing nut 701 abuts one end of the drive spring 12.

[0058] The medication dispensing mechanism is the first medication dispensing mechanism 8, which includes a drive rod 801 coaxially fixedly connected to the output end of the dose adjustment motor 14. An externally threaded connecting rod 802 is coaxially and linearly inserted into the drive rod 801. The externally threaded connecting rod 802 is threadedly connected to the medication dispensing nut (integrated medication dispensing nut 701), and the externally threaded connecting rod 802 is coaxially and 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 internal threaded connection tube 10 coaxially fixedly connected to the output end of the drive motor 20, and the internal threaded connection tube 10 is threadedly connected to an external threaded sleeve 501. The inner cavity sliding sleeve of the external threaded sleeve 501 is provided with a split medicine dispensing nut 11, and the external threaded sleeve 501 and the split medicine dispensing nut 11 are both linearly slidably connected to the bracket. The outer convex ring of the external threaded sleeve 501 is against one end of the drive spring 12, and the split medicine dispensing nut 11 is in contact with 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 medication dispensing mechanism is the second medication dispensing mechanism 9, which includes a drive screw 901 coaxially fixedly connected to the output end of the dose adjustment motor 14. A sliding connecting rod 902 is coaxially threadedly connected to the drive screw 901. The sliding connecting rod 902 is linearly slidably connected to the medication dispensing nut (split medication dispensing nut 11), and 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 the injection is completed): At this time, the motor seat 19 and the drive motor 20 are in the position closest to the pressure sensor 13, the drive spring 12 is stretched, one end of the drive spring 12 is against the pressure sensor 13, and the other end of the drive spring 12 is against the outer screw sleeve 501. The outer screw sleeve 501 is close to the split medicine dispensing nut 11, so that the split medicine dispensing nut 11 squeezes the support spring 15. The split medicine dispensing nut 11 also presses against the outer threaded connecting rod 802 so that it pushes the push rod 18 to the far left 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 seat 19.

[0065] When the motor seat 19 moves and is stuck before the driving spring 12 is compressed: the circuit board 26 controls the output end of the driving motor 20 to rotate, and the driving motor 20 drives the internal threaded connecting tube 10 to rotate. Since the internal threaded connecting tube 10 is threadedly matched with the external thread sleeve 501 and the motor seat 19 is linearly slidably matched with the bracket, the motor seat 19 can only move toward the end of the bracket. After moving to the specified position, the circuit board 26 controls the output end of the driving 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 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 seat 19, so that the motor seat 19 is temporarily locked.

[0066] When the motor seat 19 is stuck and the driving spring 12 is compressed and no medicine is taken: after the short lever 22 and the long lever 21 are stuck in the motor seat 19, the circuit board 26 controls the output end of the driving motor 20 to drive the internal threaded connecting tube 10 to rotate in the reverse direction. Since the position of the motor seat 19 is temporarily locked, the rotating internal threaded connecting tube 10 drives the external screw sleeve 501 to move linearly toward the motor seat 19. When the external screw sleeve 501 moves, the driving spring 12 is compressed. At the same time, the supporting spring 15 is stretched and squeezed to make the split medicine taking nut 11 move together with the external screw sleeve 501. (At the same time, when the driving motor 20 rotates to compress the driving spring 12, the dosage adjustment motor 14 also moves according to C PU rotates at the speed set to ensure that the external threaded connecting rod 802 remains stationary, or wait until the drive motor 20 has finished rotating, and the split medicine 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), and the drive spring 12 is squeezed and 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, and 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 seat 19 is stuck and the driving spring 12 is compressed to take medicine: the circuit board 26 controls the driving insert 801 to rotate through the dose adjustment motor 14 to drive the external threaded connecting rod 802. Since the split medicine dispensing nut 11 is fixed in position and threadedly connected to the external threaded connecting rod 802, the external threaded connecting rod 802 rotates and retracts into the split medicine dispensing nut 11. At the same time, the push rod 18 and the piston 17 move together with the split medicine dispensing nut 11, and the medicine storage cartridge 16 sucks in the medicine liquid from the end opening. After the CPU processor of the circuit board 26 controls the driving insert 801 to rotate through the dose adjustment motor 14 to complete the specified dose of medicine dispensing, the dose adjustment motor 14 stops rotating.

[0068] During injection: After dispensing, the two release buttons 24 are simultaneously pressed. This causes the short lever 22 and the long lever 21 to rotate about the lever fixing pin 23, disengaging the short lever 22 and the long lever 21 from the motor base 19. The drive spring 12 rapidly pushes the motor base 19, the drive motor 20, the internally threaded connecting tube 10, the externally threaded sleeve 501, the split dispensing nut 11, the drive insert 801, the externally threaded connecting rod 802, the dose adjustment motor 14, the push rod 18, and the piston 17 together to push the liquid medicine in the drug storage cartridge 16 forward, completing the needle-free injection. (At this time, the support spring 15 and the two leaf springs 25 are also compressed.)

[0069] Example 2

[0070] Before use (and after the injection is completed): At this time, the motor seat 19 and the drive motor 20 are in the position closest to the pressure sensor 13, the drive spring 12 is stretched, one end of the drive spring 12 is against the pressure sensor 13, and the other end of the drive spring 12 is against the internal threaded sleeve 602. The internal threaded sleeve 602 is close to the split medicine dispensing nut 11, so that the split medicine dispensing nut 11 squeezes the support spring 15. The split medicine dispensing nut 11 also presses against the external threaded connecting rod 802 so that it pushes the push rod 18 to the far left 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 seat 19.

[0071] When the motor seat 19 moves and 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 tube 601 to rotate. Since the threads of the external threaded connecting tube 601 and the internal threaded sleeve 602 are matched and the motor seat 19 and the bracket are linearly slid together, the motor seat 19 can only move toward the end of the bracket. After moving to the specified 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 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 seat 19, so that the motor seat 19 is temporarily locked.

[0072] When the motor seat 19 is stuck and the driving spring 12 is compressed and no medicine is taken: after the short lever 22 and the long lever 21 are stuck in the motor seat 19, the circuit board 26 controls the output end of the driving motor 20 to drive the external threaded connecting tube 601 to rotate in the reverse direction. Since the position of the motor seat 19 is temporarily locked, the rotating external threaded connecting tube 601 drives the internal threaded sleeve 602 to move linearly toward the motor seat 19. When the internal threaded sleeve 602 moves, the driving spring 12 is compressed. At the same time, the support spring 15 is stretched and squeezed to make the split medicine taking nut 11 move together with the internal threaded sleeve 602. (At the same time, when the driving motor 20 rotates to compress the driving 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 medicine 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), and the drive spring 12 is squeezed and 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, and the CPU processor on the circuit board 26 controls the drive motor 20 according to 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 seat 19 is stuck and the driving spring 12 is compressed to take medicine: the circuit board 26 controls the driving insert 801 to rotate through the dose adjustment motor 14 to drive the external threaded connecting rod 802. Since the split medicine dispensing nut 11 is fixed in position and threadedly connected to the external threaded connecting rod 802, the external threaded connecting rod 802 rotates and retracts into the split medicine dispensing nut 11. At the same time, the push rod 18 and the piston 17 move together with the split medicine dispensing nut 11, and the medicine storage cartridge 16 sucks in the medicine liquid from the end opening. After the CPU processor of the circuit board 26 controls the driving insert 801 to rotate through the dose adjustment motor 14 to complete the specified dose of medicine dispensing, the dose adjustment motor 14 stops rotating.

[0074] During injection: After dispensing, the two release buttons 24 are simultaneously pressed. This causes the short lever 22 and the long lever 21 to rotate about the lever fixing pin 23, disengaging the short lever 22 and the long lever 21 from the motor base 19. The drive spring 12 rapidly pushes the motor base 19, the drive motor 20, the externally threaded connecting cylinder 601, the internally threaded sleeve 602, the split dispensing nut 11, the drive insert 801, the externally threaded connecting rod 802, the dose adjustment motor 14, the push rod 18, and the piston 17 together to push the liquid medicine in the drug storage cartridge 16 forward, completing the needle-free injection. (At this time, the support spring 15 and the two leaf springs 25 are also compressed.)

[0075] Example 3

[0076] Before use (and after the injection is completed): At this time, the motor seat 19 and the drive motor 20 are in the position closest to the pressure sensor 13, the drive spring 12 is stretched, one end of the drive spring 12 is against the pressure sensor 13, and the other end of the drive spring 12 is against the integrated medicine dispensing nut 701. The integrated medicine dispensing nut 701 also presses against the external threaded connecting rod 802 so that it pushes the push rod 18 to the far left 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 seat 19.

[0077] When the motor seat 19 moves and 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 threaded connecting tube 10 to rotate. Since the internal threaded connecting tube 10 is threadedly matched with the integrated medicine removal nut 701 and the motor seat 19 is linearly slidably matched with the bracket, the motor seat 19 can only move toward the end of the bracket. After moving to the specified 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 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 seat 19, so that the motor seat 19 is temporarily locked.

[0078] After the motor seat 19 is stuck, the drive spring 12 is compressed and no medicine is taken: after the short lever 22 and the long lever 21 are stuck in the motor seat 19, the circuit board 26 controls the output end of the drive motor 20 to drive the internal threaded connecting tube 10 to rotate in the opposite direction. Since the position of the motor seat 19 is temporarily locked, the rotating internal threaded connecting tube 10 drives the integrated medicine taking nut 701 to move linearly toward the motor seat 19 (at the same time, when the drive motor 20 rotates to compress 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 after the drive motor 20 has completed its rotation, the integrated medicine 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 squeezed, the pressure is transmitted 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 according to 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 seat 19 is stuck and the driving spring 12 is compressed to take medicine: the circuit board 26 controls the driving insert 801 to rotate and drive the external threaded connecting rod 802 through the dose adjustment motor 14. Since the integrated medicine dispensing nut 701 is fixed in position and threadedly connected to the external threaded connecting rod 802, the external threaded connecting rod 802 rotates and retracts into the integrated medicine dispensing nut 701. At the same time, the push rod 18 and the piston 17 move together with the integrated medicine dispensing nut 701, and the medicine storage cartridge 16 absorbs the medicine liquid from the end opening. After the CPU processor of the circuit board 26 controls the driving insert 801 to rotate through the dose adjustment motor 14 to complete the specified dose of medicine dispensing, the dose adjustment motor 14 stops rotating.

[0080] During injection: After dispensing, the two release buttons 24 are simultaneously pressed. This squeezes the short lever 22 and the long lever 21, causing them to rotate about the lever fixing pin 23. The short lever 22 and the long lever 21 disengage from the motor base 19. The drive spring 12 rapidly pushes the motor base 19, the drive motor 20, the internally threaded connecting barrel 10, the integrated dispensing nut 701, the drive insert 801, the externally threaded connecting rod 802, the dose adjustment motor 14, the push rod 18, and the piston 17 forward to squeeze the liquid medicine in the drug storage cartridge 16, completing the needle-free injection. (At this time, the two leaf springs 25 are compressed.)

[0081] Example 4

[0082] Before use (and after the injection is completed): At this time, the motor seat 19 and the drive motor 20 are in the position closest to the pressure sensor 13, the drive spring 12 is stretched, one end of the drive spring 12 is against the pressure sensor 13, and the other end of the drive spring 12 is against the outer screw sleeve 501. The outer screw sleeve 501 is close to the split medicine dispensing nut 11, so that the split medicine dispensing nut 11 squeezes the support spring 15, and the dose adjustment motor 14 pushes the push rod 18 to the far left 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 seat 19.

[0083] When the motor seat 19 moves and is stuck before the driving spring 12 is compressed: the circuit board 26 controls the output end of the driving motor 20 to rotate, and the driving motor 20 drives the internal threaded connecting tube 10 to rotate. Since the internal threaded connecting tube 10 is threadedly matched with the external thread sleeve 501 and the motor seat 19 is linearly slidably matched with the bracket, the motor seat 19 can only move toward the end of the bracket. After moving to the specified position, the circuit board 26 controls the output end of the driving 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 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 seat 19, so that the motor seat 19 is temporarily locked.

[0084] When the motor seat 19 is stuck and the driving spring 12 is compressed and no medicine is taken: after the short lever 22 and the long lever 21 are stuck in the motor seat 19, the circuit board 26 controls the output end of the driving motor 20 to drive the internal threaded connecting tube 10 to rotate in the reverse direction. Since the position of the motor seat 19 is temporarily locked, the rotating internal threaded connecting tube 10 drives the external screw sleeve 501 to move linearly toward the motor seat 19. When the external screw sleeve 501 moves, the driving spring 12 is compressed. At the same time, the support spring 15 is stretched and squeezed to make the split medicine taking nut 11 move together with the external screw sleeve 501. (At the same time, when the driving motor 20 rotates to compress the driving spring 12, the dosage adjustment motor 14 also moves according to the rotation of the internal threaded connecting tube 10.) The CPU rotates at a speed set to ensure that the sliding connecting rod 902 remains stationary, or waits until the drive motor 20 has finished rotating, and the split medicine 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), and the drive spring 12 is squeezed and 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, and 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 seat 19 is stuck and the driving spring 12 is compressed to take the medicine: the circuit board 26 controls the driving screw 901 to rotate through the dose adjustment motor 14 to drive the sliding connecting rod 902. Since the split medicine taking nut 11 is fixed in position and is linearly slidably connected with the sliding connecting rod 902, the sliding connecting rod 902 is linearly retracted into the split medicine taking nut 11. At the same time, the push rod 18 and the piston 17 move together with the split medicine taking nut 11, and the medicine storage cartridge 16 inhales the medicine liquid from the end opening. After the CPU processor of the circuit board 26 controls the driving screw 901 to rotate through the dose adjustment motor 14 to complete the specified dose of medicine taking, the dose adjustment motor 14 stops rotating.

[0086] During injection: After dispensing the drug, the two release buttons 24 are simultaneously pressed. This causes the short lever 22 and the long lever 21 to be simultaneously squeezed, causing them to rotate about the lever fixing pin 23. The short lever 22 and the long lever 21 are then released from the motor base 19. The drive spring 12 rapidly pushes the motor base 19, the drive motor 20, the internally threaded connecting tube 10, the externally threaded sleeve 501, the split dispensing nut 11, the drive screw 901, the sliding connecting rod 902, the dose adjustment motor 14, the push rod 18, and the piston 17 together to push the drug solution in the drug storage cartridge 16 forward, completing the needle-free injection. (At this time, the support spring 15 and the two leaf springs 25 are also squeezed.)

[0087] It should be noted that the above content merely illustrates the technical idea of the present invention and cannot be used to limit the scope of protection of the present invention. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications all fall within the scope of protection of the claims of the present invention.

Claims

1. An intelligent needle-free syringe, comprising an outer shell, characterized in that: A bracket is fixedly installed in the inner cavity of the shell body, and a motor seat (19) is linearly slidably installed in the inner cavity of the thick end of the bracket. A driving motor (20) is sleeved in the motor seat (19), and the output end of the driving motor (20) drives an energy storage mechanism. The energy storage mechanism is always pressed against a driving spring (12) extending in the direction of the driving motor (20), and the other end of the driving spring (12) is pressed against the step of the inner cavity of the bracket. Any end of the driving spring (12) is also pressed against the pressure sensor (13). The medicine taking nut of the energy storage mechanism is close to the driving motor. A dosage adjustment motor (14) is fixedly mounted on one end of the machine (20), and a medicine dispensing mechanism is driven by the output end of the dosage adjustment motor (14). The connecting rod of the medicine dispensing mechanism is connected to a push rod (18). The slender end of the bracket is externally connected to a medicine storage cartridge (16), a piston (17) is installed in the medicine storage cartridge (16), and the end of the push rod (18) away from the medicine dispensing mechanism is connected to the piston (17). The outer shell and the bracket are jointly mounted with a plurality of locking and releasing components, and the locking and releasing components are used to simultaneously clamp the motor seat (19) moved 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), and the first energy storage mechanism (5) includes an internal threaded connection tube (10) coaxially fixedly connected to the output end of the driving motor (20), the internal threaded connection tube (10) is threadedly connected to an external threaded sleeve (501), and the inner cavity of the external threaded sleeve (501) is slidingly sleeved with a split medicine dispensing nut (11), and the external threaded sleeve (501) and the split medicine dispensing nut (11) are both linearly slidably connected to the bracket, the outer convex ring of the external threaded sleeve (501) is against one end of the driving spring (12), and the split medicine dispensing nut (11) is in contact with 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 smaller than that of the driving 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), and the second energy storage mechanism (6) includes an external threaded connection tube (601) coaxially fixedly connected to the output end of the drive motor (20), the external threaded connection tube (601) is threadedly connected to an internal threaded sleeve (602), and the inner cavity of the internal threaded sleeve (602) is slidably sleeved with a split medicine dispensing nut (11), and the internal threaded sleeve (602) and the split medicine dispensing nut (11) are both linearly slidably connected to the bracket, and the outer convex ring of the internal threaded sleeve (602) is pressed against one end of the drive spring (12), and the split medicine dispensing nut (11) is in contact with 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 smaller 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), and the third energy storage mechanism (7) includes an internal threaded connection tube (10) coaxially fixedly connected to the output end of the drive motor (20), and the internal threaded connection tube (10) is threadedly connected to an integrated medicine dispensing nut (701), and the integrated medicine dispensing nut (701) is linearly slidably connected to the bracket, and the outer convex ring of the integrated medicine dispensing 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 medicine dispensing mechanism is a first medicine dispensing mechanism (8), and the first medicine dispensing mechanism (8) includes a driving plug (801) coaxially fixedly connected to the output end of the dosage adjustment motor (14), the driving plug (801) is coaxially linearly slidably plugged with an externally threaded connecting rod (802), and the externally threaded connecting rod (802) is threadedly connected to the medicine dispensing nut, and the externally threaded connecting rod (802) is coaxially rotatably engaged with the push rod (18).

6. The intelligent needle-free injector according to claim 1, characterized in that: The medicine dispensing mechanism is a second medicine dispensing mechanism (9), and the second medicine dispensing mechanism (9) includes a driving screw (901) coaxially fixedly connected to the output end of the dose adjustment motor (14), the driving screw (901) is coaxially threadedly connected to a sliding connecting rod (902), and the sliding connecting rod (902) is linearly slidably connected to the medicine dispensing nut, and 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 comprises a lever fixing pin (23) connected to the bracket at both ends, the lever fixing pin (23) being connected to a lever, one end of the lever being provided with a notch adapted to clamp the edge of the motor seat (19), the outer shell being radially slidably mounted with a release button (24) adapted to the other end of the lever, one end of the lever contacting the release button (24) being extended with a leaf spring (25) which always pushes the end of the lever toward the release button (24), the leaf spring (25) being rolled up away from one end of the lever, and the rolled-up end of the leaf spring (25) always slidingly presses against the extension portion of the bracket.

8. The intelligent needle-free injector according to claim 7, characterized in that: The outer shell is equipped with two locking and releasing assemblies, and the two locking and releasing assemblies respectively set the levers 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 for limiting the medicine-taking nut from being separated 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 jointly threadedly connected to the medicine storage cartridge (16).

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

Images