A piezoelectric motor driven dental mirror needle-free syringe

Abstract

The present invention relates to a piezoelectric motor-driven dental mirror-type needle-free syringe, which belongs to the field of medical device technology and solves the problem that the existing dental mirror-type syringes with needles cause fear in patients. The piezoelectric motor-driven dental mirror-type needle-free syringe comprises a syringe, an injection hole piezoelectric linear motor, a sliding rod, a rack, a dental mirror, an injection execution device, and a mirror body angle adjustment device. An injection hole is provided on one side of the syringe, and a piezoelectric linear motor is installed inside the syringe, and a sliding rod is installed in the middle of the piezoelectric linear motor. The piezoelectric motor-driven dental mirror-type needle-free syringe of the present invention eliminates the injection needle by integrating the needle-free syringe into the dental mirror, and performs injection by puncturing the skin with pressure, thereby avoiding the patient's fear of needles and enhancing the patient's cooperation. The needle-free syringe that performs injection by puncturing the skin with pressure can assist in surface anesthesia before local infiltration anesthesia.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a dental mouth mirror-type needle-free injector driven by a piezoelectric motor. Background Art

[0002] A mouth mirror is a commonly used examination instrument in the process of oral diagnosis and treatment. It usually consists of a handle and a mouth mirror lens. It can be used for observation, reflecting and focusing light to increase lighting, and protecting or pulling soft tissue to expand the field of view. During the diagnosis and treatment of oral diseases, good and effective pain control can reduce the patient's anxiety, tension and fear, and is an important part of modern dental treatment technology. Therefore, good and effective pain control is essential during oral treatment. Currently, the most commonly used pain control method is local infiltration anesthesia through a syringe to ensure the smooth progress of the oral treatment process.

[0003] When injecting anesthetics with a syringe, patients cannot cooperate well with the anesthesia operation due to their fear of the appearance of the syringe with a needle and the pain of the anesthetic injection, so the ideal anesthesia effect cannot be achieved, which increases the patient's pain during treatment and reduces the patient's compliance with subsequent treatment.

[0004] The existing dental mirror syringe combines a traditional syringe with a dental mirror, hiding the syringe needle during the process of inserting the syringe into the patient's mouth, so that the patient cannot observe the syringe needle and reduce the patient's fear. However, this method still allows the patient to clearly feel the presence of the needle when the syringe is placed against the patient's mouth for injection, and fails to eliminate the patient's fear of the needle. At the same time, the existing dental mirror does not have the function of angle adjustment. Summary of the Invention

[0005] In view of the above analysis, an embodiment of the present invention aims to provide a piezoelectric motor driven dental mirror type needle-free syringe, so as to solve the problem mentioned in the background art that the existing dental mirror type syringe with a needle causes fear to patients.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A piezoelectric motor-driven dental mirror-type needle-free syringe comprises a syringe, a piezoelectric linear motor, a sliding rod, a rack, a dental mirror, an injection execution device and a mirror body angle adjustment device; an injection hole is provided on one side of the syringe, and a piezoelectric linear motor is installed inside the syringe, a sliding rod is installed in the middle of the piezoelectric linear motor, a rack is fixed to one end of the sliding rod, the rack is connected to the injection execution device and the mirror body angle adjustment device, and a dental mirror is installed on one side of the mirror body angle adjustment device.

[0008] Furthermore, the injection execution device includes an elongated slide groove, a positioning block groove, a second rod body, an arcuate slide groove and an injection conversion assembly; an elongated slide groove is provided on one side of the rack, a positioning block groove is provided in the rack on one side of the elongated slide groove, a positioning block is slidably connected in the elongated slide groove, the positioning block is laterally fixed to one end of the second rod body, the other end of the second rod body is installed in the arcuate slide groove, and the outer side of the second rod body is slidably connected to the injection conversion assembly.

[0009] Furthermore, the injection conversion assembly includes a toggle block, a third rod body, a toggle plate and a fan-shaped slide groove, the toggle block is fixedly connected to one end of the third rod body, the other end of the third rod body is fixedly connected to a wave plate, and a fan-shaped slide groove is opened in the injection barrel for the third rod body to slide.

[0010] Furthermore, it also includes a control board; the control board is electrically connected to the piezoelectric linear motor.

[0011] Furthermore, it also includes a liquid aspiration injection button and a safety lock button; the liquid aspiration injection button and the safety lock button are electrically connected to the control panel.

[0012] Furthermore, it also includes a power connection hole; the power connection hole is provided on the surface of the syringe, and the power connection hole is electrically connected to the control board.

[0013] Furthermore, when the aspiration injection button is continuously pressed and the safety lock button is not operated, the control panel controls the piezoelectric linear motor to drive the sliding rod to move in a direction away from the injection hole.

[0014] Furthermore, when the safety lock button is pressed continuously for more than 3 seconds and then the aspiration injection button is pressed, the control panel controls the piezoelectric linear motor to drive the sliding rod to move toward the injection hole.

[0015] Furthermore, the surface of the syringe is provided with scale lines.

[0016] Furthermore, the mirror angle adjustment device includes a magnetic gear, an electromagnet, a magnetic conversion button, a first rod body, an active bevel gear, a passive bevel gear, a transmission rod, a threaded groove, a spur gear and a mirror body connecting plate; the first rod body is installed on one side of the magnetic gear, the active bevel gear is installed on one side of the first rod body, the active bevel gear is engaged with the passive bevel gear, the passive bevel gear is connected to one end of the transmission rod, the other end of the transmission rod is provided with a threaded groove, a spur gear is engaged in the threaded groove, a mirror body connecting plate is installed on one side of the spur gear, an electromagnet is provided in the syringe, a magnetic conversion button is provided on the surface of the syringe, and the magnetic conversion button is electrically connected to the electromagnet.

[0017] Furthermore, the driving bevel gear and the passive bevel gear are connected via an L-shaped rod, so that the driving bevel gear can rotate around the passive bevel gear.

[0018] Furthermore, a protective shell is installed on one side of the injection cylinder to provide a rotation center for the passive bevel gear.

[0019] Furthermore, a groove for the transmission rod, the passive bevel gear and the spur gear to move is opened in the wall of the injection cylinder.

[0020] The above technical solution has at least one of the following beneficial effects:

[0021] (1) The piezoelectric motor-driven dental mirror-type needle-free injector of the present invention eliminates the injection needle by integrating the needle-free injector into the dental mirror. The injection is performed by puncturing the skin with pressure, thereby avoiding the patient's fear of needles and enhancing the patient's compliance. The needle-free injector that punctures the skin with pressure can assist in surface anesthesia before local infiltration anesthesia, and can reduce the discomfort caused by injection compared to anesthesia devices using injection needles.

[0022] (2) The arrangement of the rack, injection actuator, and mirror angle adjustment device of the present invention enables the piezoelectric linear motor to serve as a power source for liquid medicine extraction, liquid medicine injection, and oral mirror angle adjustment, thus facilitating the doctor's operation;

[0023] (3) The coordinated design of the aspiration injection button and the safety lock button of the present invention avoids the dangerous situation of liquid injection caused by accidental touch during needle-free injection.

[0024] In the present invention, the above-mentioned technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of the present invention will be described in the following description, and some advantages will become apparent from the description or be learned through practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the description and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like parts throughout the drawings.

[0026] Figure 1 This is a schematic diagram of the structure of a piezoelectric motor driven dental mirror needle-free syringe of the present invention. Figure 1 .

[0027] Figure 2 This is a schematic diagram of the structure of a piezoelectric motor driven dental mirror needle-free syringe of the present invention. Figure 2 .

[0028] Figure 3 This is a schematic diagram of the internal structure of a piezoelectric motor driven dental mirror needle-free syringe of the present invention. Figure 1 .

[0029] Figure 4 This is a schematic diagram of the internal structure of a piezoelectric motor driven dental mirror needle-free syringe of the present invention. Figure 2 .

[0030] Figure 5 for Figure 3 Enlarged view of point A in the middle.

[0031] Figure 6 for Figure 3 Enlarged view of point B in the middle.

[0032] Figure 7 for Figure 4 Enlarged view of point C in the middle.

[0033] Figure 8 This is a schematic structural diagram of the injection hole of a dental mirror-type needle-free syringe driven by a piezoelectric motor according to the present invention.

[0034] In the figure: 1. syringe, 2. mirror body folding button, 3. mirror body extension button, 4. aspiration injection button, 5. safety lock button, 6. dental mirror, 7. fan-shaped slide, 8. toggle plate, 9. piezoelectric linear motor, 10. sliding rod, 11. rack, 12. electromagnet, 13. magnetic gear, 14. first rod, 15. driving bevel gear, 16. driven bevel gear, 17. transmission rod, 18. second rod, 19. toggle recess, 20. third rod, 21. threaded groove, 22. spur gear, 23. mirror body connecting plate, 24. arcuate slide, 25. piston plate, 26. elongated slide, 27. positioning block groove, 28. injection hole. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0036] Example 1

[0037] A specific embodiment of the present invention discloses a piezoelectric motor driven dental mirror needle-free injector, such as Figure 1 、 Figure 3 and Figure 8As shown, it includes a syringe 1, a piezoelectric linear motor 9, a sliding rod 10, a rack 11, a dental mirror 6, an injection execution device and a mirror body angle adjustment device; an injection hole 28 is provided on one side of the syringe 1, and a piezoelectric linear motor 9 is installed inside the syringe 1, a sliding rod 10 is installed in the middle of the piezoelectric linear motor 9, a rack 11 is fixed at one end of the sliding rod 10, the rack 11 is connected to the injection execution device and the mirror body angle adjustment device, and an dental mirror 6 is installed on one side of the mirror body angle adjustment device.

[0038] The syringe 1 is used to store the medicine required for injection; the injection hole 28 is used to inhale or discharge the medicine; the piezoelectric linear motor 9 is a hollow ring structure, and the amplitude and frequency of the excitation voltage of the piezoelectric linear motor 9 are adjusted to change the outlet speed of the medicine and the dosage of the input medicine or provide power for the mirror angle adjustment device; the sliding rod 10 is the output shaft of the piezoelectric linear motor 9; the rack 11 is used to cooperate with the mirror angle adjustment device to realize the adjustment of the angle of the oral mirror 6; the injection execution device is used to control the extraction and discharge of the medicine in the syringe 1.

[0039] Preferably, Figure 6 、 Figure 7 As shown, the injection execution device includes an elongated slide groove 26, a positioning block groove 27, a second rod body 18, an arcuate slide groove 24 and an injection conversion assembly; an elongated slide groove 26 is provided on one side of the rack 11, and a positioning block groove 27 is provided in the rack 11 on one side of the elongated slide groove 26, and a positioning block is slidably connected in the elongated slide groove 26, and the positioning block is laterally fixed to one end of the second rod body 18, and the other end of the second rod body 18 is installed in the arcuate slide groove 24, and the outer side of the second rod body 18 is slidably connected to the injection conversion assembly.

[0040] When the positioning block is in the elongated slide groove 26 and can slide in any direction along the groove, the injection execution device is in a non-working state. When the positioning block is in the positioning block groove 27, the injection execution device is in a working state. The second rod body 18 can move along the arc-shaped slide groove 24, so that the positioning block moves in the positioning block groove 27 and the elongated slide groove 26 to switch the working state of the injection execution device.

[0041] Preferably, Figure 2 、 Figure 4 and Figure 5 As shown, the injection conversion assembly includes a toggle recess 19, a third rod body 20, a toggle plate 8 and a fan-shaped slide 7. The toggle recess 19 is fixedly connected to one end of the third rod body 20, and the other end of the third rod body 20 is fixedly connected to a wave plate. A fan-shaped slide 7 is provided in the injection barrel 1 for the third rod body 20 to slide.

[0042] The third rod 20 moves along the fan-shaped slot 7 to move the toggle piece 8. The toggle piece 8 drives the toggle concave block 19 to move through the third rod 20. The toggle concave block 19 drives the second rod 18 to move. The second rod 18 drives the positioning block to move.

[0043] Preferably, a control board is further included; the control board is electrically connected to the piezoelectric linear motor 9.

[0044] The control board is used to control the working state of the piezoelectric linear motor 9.

[0045] Preferably, it further comprises a liquid aspiration injection button 4 and a safety lock button 5; the liquid aspiration injection button 4 and the safety lock button 5 are electrically connected to the control panel.

[0046] Preferably, it also includes a mirror body folding button 2 and a mirror body stretching button 3; the mirror body folding button 2 and the mirror body stretching button 3 are electrically connected to the control panel.

[0047] When the safety lock button 5 does not move and the aspiration and injection button 4 is continuously pressed, the piezoelectric linear motor 9 drives the sliding rod 10 to pump liquid. When the safety lock button is pressed for 3 seconds and the aspiration and injection button 4 is pressed, the piezoelectric linear motor 9 drives the sliding rod 10 to discharge liquid. At this time, the piezoelectric linear motor 9 can generate a maximum axial output force of 1.28N, and the piezoelectric linear motor 9 is used to accelerate the nanoliter (50-650nL) fluid drawn into the syringe 1 to a sufficient speed (60-160m / s) to achieve skin penetration and drug delivery.

[0048] The fluid injection speed, impact pressure, injection dose and skin penetration depth are adjusted by the amplitude and frequency of the excitation voltage given to the piezoelectric linear motor 9. At the same time, when two-phase voltage excitation is adopted, the direction of the piezoelectric linear motor 9 is adjusted by adjusting the phase difference of the two-phase excitation voltage, thereby realizing the extraction and injection of the drug; when single-phase voltage excitation is adopted, it is necessary to adjust the direction of the piezoelectric linear motor 9 by adjusting the frequency of the excitation voltage, thereby realizing the extraction and injection of the drug.

[0049] Preferably, it also includes a power connection hole; the surface of the syringe 1 is provided with a power connection hole, and the power connection hole is electrically connected to the control board.

[0050] Preferably, when the aspiration injection button 4 is continuously pressed and the safety lock button 5 is not operated, the control panel controls the piezoelectric linear motor 9 to drive the sliding rod 10 to move in a direction away from the injection hole 28 .

[0051] Preferably, when the safety lock button 5 is continuously pressed and then the aspiration injection button 4 is pressed for more than 3 seconds, the control panel controls the piezoelectric linear motor 9 to drive the sliding rod 10 to move toward the injection hole 28 .

[0052] Preferably, it also includes scale lines; the surface of the injection barrel 1 is provided with scale lines.

[0053] The scale lines are used to easily determine the amount of liquid medicine to be extracted.

[0054] Preferably, the mirror angle adjustment device includes a magnetic gear 13, an electromagnet 12, a magnetic conversion button, a first rod body 14, an active bevel gear 15, a passive bevel gear 16, a transmission rod 17, a threaded groove 21, a spur gear 22 and a mirror body connecting plate 23; the first rod body 14 is installed on one side of the magnetic gear 13, and the active bevel gear 15 is installed on one side of the first rod body 14. The active bevel gear 15 is meshed with the passive bevel gear 16, and the passive bevel gear 16 is connected to one end of the transmission rod 17. The other end of the transmission rod 17 is provided with a threaded groove 21, and a spur gear 22 is meshed in the threaded groove 21. A mirror body connecting plate 23 is installed on one side of the spur gear 22, an electromagnet 12 is provided in the injection barrel 1, and a magnetic conversion button is provided on the surface of the injection barrel 1, and the magnetic conversion button is electrically connected to the electromagnet 12.

[0055] The arrangement of the magnetic gear 13 and the electromagnet 12 enables the magnetic gear 13 to engage with or disengage from the rack 11 , and the magnetic gear 13 can be controlled to move closer to or away from the rack 11 by controlling the polarity of the electromagnet 12 .

[0056] When it is necessary to adjust the angle of the oral mirror 6 through the mirror angle adjustment device, press the magnetic conversion button to make the electromagnet 12 attract the magnetic gear 13, and the magnetic gear 13 engages with the rack 11. Press the mirror folding button 2 or the mirror stretching button 3 according to the direction of the angle to be adjusted, and the piezoelectric linear motor 9 drives the sliding rod 10 to move, the sliding rod 10 drives the rack 11 to move, and the rack 11 drives the magnetic gear 13 to rotate, and the magnetic gear 13 drives the first rod body 14 to rotate, and the first rod body 14 drives the active bevel gear 15 to rotate, and the active bevel gear 15 drives the passive bevel gear 16 to rotate, and the passive bevel gear 16 drives the transmission rod 17 to rotate, and the transmission rod 17 drives the thread groove 21 to rotate, and the thread groove 21 drives the spur gear 22 to rotate, and the spur gear 22 drives the oral mirror 6 to rotate.

[0057] Preferably, the driving bevel gear 15 and the passive bevel gear 16 are connected via an L-shaped rod, so that the driving bevel gear 15 can rotate around the passive bevel gear 16 .

[0058] Preferably, a protective shell is installed on one side of the injection cylinder 1 to provide a rotation center for the passive bevel gear 16.

[0059] Preferably, a groove for the transmission rod 17, the passive bevel gear 16 and the spur gear 22 to move is opened in the wall of the injection cylinder 1.

[0060] When needle-free injection of liquid medicine is required, the magnetic gear 13 is separated from the rack 11 by controlling the magnetic conversion button, and 3 seconds after pressing the safety lock button 5, the aspiration injection button 4 is pressed, the sliding rod 10 moves down to the lowest part, the positioning block is parallel to the positioning block groove 27, and the toggle piece 8 is toggled. The toggle piece 8 drives the positioning block to move into the positioning block groove 27 through the third rod body 20 and the toggle recessed block 19.

[0061] Continuously press the aspiration injection button 4, and the aspiration injection button 4 drives the sliding rod 10 to move upward through the piezoelectric linear motor 9. The sliding rod 10 drives the piston plate 25 to move through the rack 11, the positioning block groove 27, the positioning block and the second rod body 18 to achieve the extraction of the liquid medicine.

[0062] The principle of needle-free injection of liquid medicine into the patient's mouth is as follows: 3 seconds after pressing the safety lock button 5, press the liquid aspiration injection button 4, the sliding rod 10 moves to the lowest part instantly, and the sliding rod 10 drives the piston plate 25 to move through the rack 11, the positioning block groove 27, the positioning block and the second rod body 18 to realize the injection of liquid medicine. The injection speed of the liquid medicine is more than 8 times the extraction speed.

[0063] Example 2

[0064] This embodiment provides a method for using a dental mirror-type needle-free syringe, which is used for using the dental mirror-type needle-free syringe driven by the piezoelectric motor provided in Example 1. The method includes the following steps:

[0065] Step 1: Determine how to use the mouth mirror needle-free syringe;

[0066] When the oral mirror type needle-free syringe uses its oral mirror function, execute step 2; when the oral mirror type needle-free syringe uses its injection function, execute step 3;

[0067] Step 2: Adjust the angle of the dental mirror;

[0068] Step 2.1: Press the magnetic conversion button to make the electromagnet 12 attract the magnetic gear 13;

[0069] The magnetic gear 13 is meshed with the rack 11;

[0070] Step 2.2: Press the mirror folding button 2 or the mirror extending button 3 according to the adjustment direction;

[0071] The piezoelectric linear motor 9 drives the sliding rod 10 to move, the sliding rod 10 drives the rack 11 to move, the rack 11 drives the magnetic gear 13 to rotate, the magnetic gear 13 drives the first rod body 14 to rotate, the first rod body 14 drives the active bevel gear 15 to rotate, the active bevel gear 15 drives the passive bevel gear 16 to rotate, the passive bevel gear 16 drives the transmission rod 17 to rotate, the transmission rod 17 drives the thread groove 21 to rotate, the thread groove 21 drives the spur gear 22 to rotate, and the spur gear 22 drives the dental mirror 6 to rotate, thereby adjusting the angle of the dental mirror 6;

[0072] Step 3: Perform needle-free injection into the oral cavity;

[0073] Step 3.1: 3 seconds after pressing the safety lock button 5, press the aspiration injection button 4; the sliding rod 10 moves down to the bottom, and the positioning block is parallel to the positioning block groove 27;

[0074] Step 3.2: Move the toggle piece 8; the toggle piece 8 drives the positioning block to move into the positioning block groove 27 through the third rod 20 and the toggle recess 19;

[0075] Step 3.3: Continuously press the aspiration injection button 4; the aspiration injection button 4 drives the sliding rod 10 upward via the piezoelectric linear motor 9, and the sliding rod 10 drives the piston plate 25 to move via the rack 11, the positioning block slot 27, the positioning block, and the second rod body 18, thereby extracting the liquid medicine;

[0076] Step 3.4: Aim at the injection position, press the safety lock button 5 for 3 seconds, and then press the aspiration injection button 4; the sliding rod 10 moves to the bottom instantly, and the sliding rod 10 drives the piston plate 25 to move through the rack 11, the positioning block groove 27, the positioning block and the second rod body 18 to achieve the discharge of the liquid medicine and complete the needle-free injection of the liquid medicine.

[0077] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A piezoelectric motor driven dental mirror needle-free syringe, characterized in that: The invention comprises an injection cylinder (1), a piezoelectric linear motor (9), a sliding rod (10), a rack (11), an oral mirror (6), an injection execution device and a mirror body angle adjustment device; an injection hole (28) is provided on one side of the injection cylinder (1), and a piezoelectric linear motor (9) is installed inside the injection cylinder (1); a sliding rod (10) is installed in the middle of the piezoelectric linear motor (9); a rack (11) is fixed to one end of the sliding rod (10); the rack (11) is connected to the injection execution device and the mirror body angle adjustment device; and a oral mirror (6) is installed on one side of the mirror body angle adjustment device; The injection execution device includes an elongated chute (26), a positioning block groove (27) and a second rod body (18); a long chute (26) is provided on one side of the rack (11); a positioning block groove (27) is provided in the rack (11) on one side of the long chute (26); a positioning block is slidably connected in the long chute (26); the positioning block is laterally fixed to one end of the second rod body (18); the positioning block moves in the positioning block groove (27) and the long chute (26) to switch the working state of the injection execution device; The mirror body angle adjustment device comprises a magnetic gear (13), an electromagnet (12), a first rod (14), an active bevel gear (15), a passive bevel gear (16), a transmission rod (17), a thread groove (21), a spur gear (22) and a mirror body connecting plate (23); the first rod (14) is mounted on one side of the magnetic gear (13); the active bevel gear (15) is mounted on one side of the first rod (14); the active bevel gear (15) is meshed with the passive bevel gear (16); the passive bevel gear (16) is connected to one end of the transmission rod (17); the other end of the transmission rod (17) is provided with a thread groove (21); a spur gear (22) is meshed in the thread groove (21); a mirror body connecting plate (23) is mounted on one side of the spur gear (22); the magnetic gear (13) is controlled to approach or move away from the rack (11) by controlling the electromagnet (12), so that the magnetic gear (13) can be meshed with or disengaged from the rack (11).

2. The piezoelectric motor driven dental mirror needle-free injector according to claim 1, characterized in that: The mirror body angle adjustment device also includes an arc-shaped slide groove (24) and an injection conversion component. The other end of the second rod body (18) is installed in the arc-shaped slide groove (24), and the outer side of the second rod body (18) is slidably connected to the injection conversion component.

3. The piezoelectric motor driven dental mirror needle-free injector according to claim 2, characterized in that: The injection conversion assembly comprises a toggle recess (19), a third rod (20), a toggle plate (8) and a fan-shaped slide (7); the toggle recess (19) is fixedly connected to one end of the third rod (20); the other end of the third rod (20) is fixedly connected to a wave plate; and a fan-shaped slide (7) for the third rod (20) to slide is provided in the injection barrel (1).

4. The piezoelectric motor driven dental mirror needle-free injector according to claim 1, characterized in that: It also includes a control board; the control board is electrically connected to the piezoelectric linear motor (9).

5. The piezoelectric motor driven dental mirror needle-free injector according to claim 4, characterized in that: It also includes a liquid aspiration and injection button (4) and a safety lock button (5); the liquid aspiration and injection button (4) and the safety lock button (5) are electrically connected to the control panel.

6. The piezoelectric motor driven dental mirror type needle-free injector according to claim 4, characterized in that: It also includes a power connection hole; the surface of the syringe (1) is provided with a power connection hole, and the power connection hole is electrically connected to the control panel.

7. The piezoelectric motor driven dental mirror needle-free injector according to claim 5, characterized in that: When the aspiration injection button (4) is continuously pressed and the safety lock button (5) is not operated, the control panel controls the piezoelectric linear motor (9) to drive the sliding rod (10) to move in a direction away from the injection hole (28).

8. A piezoelectric motor-driven dental mirror-type needle-free syringe according to claim 5, characterized in that when the safety lock button (5) is pressed continuously for more than 3 seconds and then the aspiration injection button (4) is pressed, the control panel controls the piezoelectric linear motor (9) to drive the sliding rod (10) to move toward the injection hole (28).

9. The piezoelectric motor driven dental mirror needle-free injector according to claim 1, characterized in that: The surface of the injection barrel (1) is provided with scale lines.

10. The piezoelectric motor driven dental mirror type needle-free injector according to claim 4, characterized in that: It also includes a mirror body folding button (2) and a mirror body stretching button (3); the mirror body folding button (2) and the mirror body stretching button (3) are electrically connected to the control panel.

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