Handle structure and dental equipment

Abstract

The utility model belongs to the technical field of medical equipment, and relates to a handle structure and dental device.The handle structure comprises a needle and a handle body, the needle is arranged at one end of the handle body, and the handle body comprises a driving part, a transmission shaft, a first control unit, a second control unit and a main circuit board; the driving part, the first control unit and the second control unit are electrically connected with the main circuit board; one end of the transmission shaft is fixedly connected with the needle head, the other end of the transmission shaft is connected with the driving part, and the driving part is used for driving the transmission shaft to drive the needle head to reciprocate around a central axis; the first control unit is used for switching the reciprocating rotation frequency of the needle, and the second control unit is used for switching the reciprocating rotation angle amplitude of the needle. The first control unit and the second control unit are arranged to control the reciprocating rotation frequency and angle amplitude of the needle respectively, the reciprocating rotation motion parameters of the needle are diversified, the flexibility of the handle structure is high, and various washing requirements of doctors can be met.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and more specifically, to a handle structure and a dental device. Background Art

[0002] During oral treatment, a root canal irrigator makes the irrigation needle vibrate at a high frequency by the high-speed rotation of a motor, thereby agitating the disinfectant liquid in the root canal and playing a role in flushing the root canal. Due to the differences in the length, thickness, shape, etc. of the root canals, the vibration frequency of the irrigation needle and the swing amplitude of the needle tip required for flushing the root canals are different.

[0003] However, the existing root canal irrigators in the prior art cannot adjust the vibration frequency and amplitude of the irrigation needle simultaneously, and the flexibility of use of the root canal irrigator is poor for various irrigation requirements of doctors. Utility Model Content

[0004] The technical problem to be solved by the technical solution of this application is that in the prior art, the root canal irrigator cannot adjust the vibration frequency and amplitude of the irrigation needle simultaneously, and the flexibility of the root canal irrigator is poor.

[0005] To solve the above technical problem, the technical solution of this application provides a handle structure, which adopts the following technical solution:

[0006] A handle structure includes a needle head and a handle body;

[0007] The needle head is arranged at one end of the handle body;

[0008] The handle body includes a driving member, a transmission shaft, a first control unit, a second control unit and a main circuit board. The driving member, the first control unit and the second control unit are all electrically connected to the main circuit board; one end of the transmission shaft is fixedly connected to the needle head, and the other end is connected to the driving member. The transmission shaft has a central axis, and the driving member is used to drive the transmission shaft to drive the needle head to rotate reciprocally around the central axis; the first control unit is used to switch the frequency of the reciprocal rotation of the needle head, and the second control unit is used to switch the angular amplitude of the reciprocal rotation of the needle head.

[0009] Further, a frequency gear module and a power adjustment module are provided on the main circuit board;

[0010] The frequency gear module includes at least two different frequency gears, and the first control unit is used to switch the frequency gears;

[0011] The power adjustment module controls the input power of the driving member according to the frequency gear selected by the first control unit, and further controls the frequency of the reciprocal rotation of the needle head.

[0012] Further, an amplitude range module and a time adjustment module are also provided on the main circuit board;

[0013] The amplitude range module includes at least two different amplitude ranges, and the second control unit is used to switch the amplitude range;

[0014] The time adjustment module controls the rotation time of the driving member within a single reciprocating rotation cycle according to the amplitude range selected by the second control unit, thereby controlling the angular amplitude of the reciprocating rotation of the needle.

[0015] Further, the handle body further includes a handle housing, a holding portion is provided on the handle housing, the holding portion is located on the side of the handle housing close to the needle, and the first control unit and the second control unit are provided on the side of the handle housing away from the needle.

[0016] Further, a needle connection portion is provided on the side of the transmission shaft close to the needle, the needle connection portion protrudes from the handle body, and the needle is detachably fixed on the needle connection portion.

[0017] Further, the needle connection portion has a linear structure, the needle is a bent needle, the needle has a straight section and an arc section connected to each other, and the straight section is detachably connected to the needle connection portion;

[0018] Alternatively, the needle is a straight needle, the needle connection portion has a first straight section and a second straight section connected to each other, the included angle between the first straight section and the second straight section is an obtuse angle, the second straight section is located on the side of the needle connection portion away from the driving member, and the second straight section is detachably connected to the needle.

[0019] Further, the handle body further includes an angle sensor assembly, the angle sensor assembly is disposed adjacent to the driving member, and the angle sensor assembly is used to detect the rotation angle of the needle.

[0020] Further, the angle sensor assembly includes a sensor and a sensor circuit board, the sensor is fixed on the sensor circuit board, the sensor circuit board is fixed at one end of the driving member away from the transmission shaft, and the sensor circuit board is electrically connected to the main circuit board.

[0021] Further, a power supply member is also provided in the handle body, the power supply member is electrically connected to the main circuit board, and the power supply member is used to supply power to the handle structure.

[0022] In order to solve the above technical problems, the technical solution of the present application also provides a dental device, which adopts the following technical solution:

[0023] A dental device, including the handle structure as described above.

[0024] Compared with the prior art, the technical solution of this application mainly has the following beneficial effects:

[0025] The technical solution provided by this application is provided with a driving member, a transmission shaft, a first control unit, a second control unit and a main circuit board. The driving member, the first control unit and the second control unit are all electrically connected to the main circuit board. The driving member is used to drive the transmission shaft to drive the needle to reciprocally rotate around the central axis of the transmission shaft. The first control unit is used to control the reciprocating rotation frequency of the needle, and the second control unit is used to control the angular amplitude of the reciprocating rotation of the needle. Doctors can adjust the reciprocating rotation frequency and angular amplitude of the needle according to different surgical conditions such as the length, thickness, and shape of the root canal. The motion parameters of the reciprocating rotation of the needle are diversified, and the flexibility of the handle structure is high, which can meet various irrigation needs of doctors; in addition, when the needle rotates, by setting appropriate rotation frequency and angular amplitude, stronger shear force and acoustic streaming effect can be generated during root canal irrigation, which helps to effectively remove debris and smear layer in the root canal and improve the effect of root canal irrigation; in addition, by pressing the keys to control the reciprocating rotation frequency and angular amplitude of the needle, the adjustment of the rotation frequency and angular amplitude of the needle is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the solutions in this application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0027] Figure 1 It is a schematic cross-sectional view of the handle structure provided by the embodiment of the present utility model.

[0028] Reference Signs:

[0029] 100. Handle structure; 1. Needle; 11. Straight section; 12. Arc section; 2. Handle body; 21. Driving member; 22. Transmission shaft; 221. Needle connection part; 23. First control unit; 24. Second control unit; 25. Main circuit board; 26. Handle housing; 261. Installation wall surface; 27. Sensor; 28. Power supply member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "comprising" and "having" and any variations thereof in the specification, claims, and drawings of this application are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification, claims, or drawings of this application are used to distinguish different objects and not to describe a particular order.

[0031] Reference herein to "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0032] To enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0033] The following is combined with Figure 1 to describe the embodiments of the present invention.

[0034] Please refer to Figure 1, the handle structure 100 of the present application includes a needle 1 and a handle body 2. The needle 1 is provided at one end of the handle body 2. The handle body 2 includes a driving member 21, a transmission shaft 22, a first control unit 23, a second control unit 24, and a main circuit board 25. The driving member 21, the first control unit 23, and the second control unit 24 are all electrically connected to the main circuit board 25. One end of the transmission shaft 22 is fixedly connected to the needle 1, and the other end is connected to the driving member 21. The transmission shaft 22 has a central axis. The driving member 21 is used to drive the transmission shaft 22 to drive the needle 1 to reciprocally rotate around the central axis of the transmission shaft 22; the first control unit 23 is used to switch the reciprocating rotation frequency of the needle 1, and the second control unit 24 is used to switch the angle amplitude of the reciprocating rotation of the needle 1. In this embodiment, the doctor can adjust the reciprocating rotation frequency and angle amplitude of the needle 1 according to different surgical conditions such as the length, thickness, and shape of the root canal. The motion parameters of the reciprocating rotation of the needle 1 are diverse, which can meet various irrigation requirements of the doctor. The flexibility and practicality of the handle structure 100 are high; in addition, when the needle 1 rotates, by matching appropriate rotation frequency and angle amplitude, stronger shear force and acoustic streaming effect can be generated during root canal irrigation, effectively removing debris and smear layer in the root canal and improving the effect of root canal irrigation; in addition, by pressing buttons to switch the reciprocating rotation frequency and angle amplitude of the needle 1, the adjustment of the rotation frequency and angle amplitude of the needle 1 is simple and convenient.

[0035] In this embodiment, the reciprocating rotation frequency of the needle 1 refers to the number of reciprocating rotations completed by the needle 1 per unit time; the angle amplitude of the reciprocating rotation of the needle 1 refers to the change range of its rotation angle in a single reciprocating rotation cycle.

[0036] In this embodiment, the type of the handle structure 100 is not limited. The handle structure 100 can be an implant handle, a root canal irrigation handle, a root canal irrigation and cleaning handle, etc. Preferably, the handle structure 100 is a root canal irrigation and cleaning handle.

[0037] In this embodiment, the shape of the transmission shaft 22 is not limited. The transmission shaft 22 can be columnar, plate-shaped or other shapes. The transmission shaft 22 can be directly connected or indirectly connected to the driving member 21.

[0038] In this embodiment, the types of the first control unit 23 and the second control unit 24 are not limited. The first control unit 23 and the second control unit 24 can be buttons, push buttons, touch screens or other types of control structures.

[0039] In this embodiment, the type of the driving member 21 is not limited. The driving member 21 can be a DC motor, an AC motor, a micro motor, a stepper motor, a rotary electric cylinder or other types of driving components.

[0040] In one embodiment, a frequency gear module and a power adjustment module are provided on the main circuit board 25. The frequency gear module includes at least two different frequency gears, and the first control unit 23 is used to switch the frequency gears; the power adjustment module can control the input power of the driving member 21 according to the frequency gear selected by the first control unit 23, thereby controlling the frequency of the reciprocating rotation of the needle 1.

[0041] In a specific embodiment, the driving member 21 is a DC motor. A stator and a rotor are provided in the DC motor. A magnet is provided on the stator. When the stator is energized, a magnetic field can be generated. The rotor can rotate relative to the stator under the action of the magnetic field. The transmission shaft 22 is fixedly connected to the rotor. When the rotor rotates, it can drive the transmission shaft 22 and the needle 1 to rotate synchronously; the driving member 21 and the first control unit 23 are both electrically connected to the main circuit board 25. The frequency gear of the handle structure 100 can be selected through the first control unit 23. The power adjustment module can control the input power of the driving member 21 according to the frequency gear selected by the first control unit 23, so as to control the magnitude of the magnetic field generated by the stator and the rotational speed of the rotor, and thereby indirectly control the speed and frequency of the reciprocating rotation of the transmission shaft 22 and the needle 1.

[0042] In one embodiment, an amplitude gear module and a time adjustment module are further provided on the main circuit board 25. The amplitude gear module includes at least two different amplitude gears, and the second control unit 24 is used to switch the amplitude gears. The time adjustment module can control the rotation time of the rotor of the driving member 21 and the needle 1 within a single reciprocating rotation cycle according to the amplitude gear selected by the second control unit 24. When the frequency is constant, the angle amplitude of the reciprocating rotation of the needle 1 is changed by adjusting the movement time of the needle 1 within a single reciprocating rotation cycle.

[0043] In one embodiment, please refer to Figure 1 , the number of frequency gears on the main circuit board 25 is not limited, and the number of frequency gears can be 2 or more. In a preferred embodiment, the frequency gears at least include a low-frequency gear, a medium-frequency gear and a high-frequency gear, and the first control unit 23 is used to control the switching of the frequency gears. Specifically, when the first control unit 23 is pressed for the first time, the frequency gear of the handle structure 100 is the low-frequency gear. When the first control unit 23 is pressed for the second time, the frequency gear is switched from the low-frequency gear to the medium-frequency gear. When the first control unit 23 is pressed for the third time, the frequency gear is switched from the medium-frequency gear to the high-frequency gear. When the first control unit 23 is pressed for the fourth time, the frequency gear is switched from the high-frequency gear to the low-frequency gear. In this way, multiple different frequency gears can be cyclically switched by pressing the first control unit 23 multiple times. In this embodiment, the multi-gear design can provide multiple choices for doctors, allowing doctors to select the most suitable gear according to the oral condition and actual needs, thereby improving the use experience.

[0044] In one embodiment, please refer toFigure 1 , the number of amplitude gears on the main circuit board 25 is not limited, and the number of amplitude gears can be 2 or more. In a preferred embodiment, the amplitude gears include at least a small amplitude gear, a medium amplitude gear and a large amplitude gear, and the second control unit 24 is used to control the switching of the amplitude gears. Specifically, the first time the second control unit 24 is pressed, the amplitude gear of the handle structure 100 is a small amplitude gear, the second time the second control unit 24 is pressed, the amplitude gear is switched from a small amplitude gear to a medium amplitude gear, the third time the second control unit 24 is pressed, the amplitude gear is switched from a medium amplitude gear to a large amplitude gear, and the fourth time the second control unit 24 is pressed, the amplitude gear is switched from a large amplitude gear to a small amplitude gear; in this way, multiple gears with different angle amplitudes can be cyclically switched by pressing the second control unit 24 multiple times. In this embodiment, the multi-gear design can provide doctors with a variety of options, allowing doctors to choose the most suitable gear according to oral conditions and actual needs, thereby improving the user experience.

[0045] In one embodiment, please refer to Figure 1 The handle body 2 further includes a handle housing 26, in which the driving member 21, the transmission shaft 22 and the main circuit board 25 are arranged, and the first control unit 23 and the second control unit 24 are arranged on the handle housing 26; the handle housing 26 is also provided with a gripping portion (not shown in the figure), which is located on a side of the handle housing 26 close to the needle 1, and the first control unit 23 and the second control unit 24 are arranged on a side of the handle housing 26 away from the needle 1. The first control unit 23, the second control unit 24 and the gripping portion are staggered, which can prevent the doctor from accidentally touching the first control unit 23 and the second control unit 24 when grasping the handle structure 100.

[0046] In another embodiment, the main circuit board 25 has a preparatory mode and a working mode. When the handle structure 100 is in the preparatory mode, the rotation frequency and the angle amplitude of the needle 1 can be set by pressing the first control unit 23 and the second control unit 24; when the handle structure 100 is in the working mode, the rotation frequency and the angle amplitude of the needle 1 cannot be adjusted by pressing the first control unit 23 and the second control unit 24, which can prevent the doctor from accidentally touching the first control unit 23 and the second control unit 24 when the handle structure 100 is working, causing the needle 1 to rotate unexpectedly, affecting the safety of the operation.

[0047] In one embodiment, please refer to Figure 1, on the side of the transmission shaft 22 close to the needle 1, there is a needle connecting portion 221. The needle connecting portion 221 protrudes from the handle body 2, and the needle 1 is detachably fixed on the needle connecting portion 221. In this embodiment, the needle 1 is a consumable part, and the needle 1 is detachably fixed on the needle connecting portion 221, which is convenient for disassembling the needle 1 for replacement; in addition, the needle connecting portion 221 protrudes from the handle body 2, which is convenient for loading and unloading the needle 1 from the outside of the handle body 2.

[0048] In one embodiment, please refer to Figure 1 , the needle connecting portion 221 is of a linear structure, the needle 1 is a bent needle 1, the needle 1 has a straight section 11 and an arc section 12 connected to each other, and the straight section 11 is fixedly connected to the needle connecting portion 221. In this embodiment, the bent needle 1 can better adapt to the root canal morphology, ensuring that the needle 1 can reach all corners of the root canal during the cleaning and disinfection process. In addition, the bent needle 1 can conform to the bending direction of the root canal, reduce resistance, and improve the smoothness of the operation.

[0049] In one embodiment, an internal thread is provided on the inner wall of the straight section 11 of the needle 1, and an external thread adapted to the internal thread is provided on the outer wall of the needle connecting portion 221. The straight section 11 of the needle 1 and the needle connecting portion 221 can be threadedly connected.

[0050] In another embodiment, the straight section 11 of the needle 1 is an elastic plastic tube, the elastic plastic tube is sleeved on the needle connecting portion 221, and the straight section 11 of the needle 1 and the needle connecting portion 221 are in interference connection.

[0051] In an embodiment not shown, the needle 1 is a straight needle 1, the needle connecting portion 221 has a first straight section and a second straight section connected to each other, the included angle between the first straight section and the second straight section is an obtuse angle, the second straight section is located on the side of the needle connecting portion 221 away from the driving member 21, and the second straight section is threadedly connected or in interference connection with the needle 1.

[0052] In one embodiment, please refer to Figure 1 , the handle body 2 further includes an angle sensor assembly. The angle sensor assembly is disposed adjacent to the driving member 21. The angle sensor assembly is used to detect the rotation angle of the needle 1, which can more accurately identify the rotation angle of the irrigation needle 1 and improve the accuracy of the angle adjustment of the needle 1.

[0053] Furthermore, the angle sensor assembly includes a sensor 27 and a sensor circuit board (not shown in the figure). The sensor 27 is fixed on the sensor circuit board. The sensor circuit board is fixed at one end of the driving member 21 away from the transmission shaft 22. The sensor circuit board is electrically connected to the main circuit board 25. In this embodiment, the specific type of the angle sensor 27 is not limited. The angle sensor 27 can be a Hall sensor, a resolver, an encoder, etc.

[0054] In a specific embodiment, the angle sensor 27 is a Hall sensor, and the driving member 21 is a DC motor. The DC motor is provided with a stator and a rotor. A magnet is provided on the stator. When the stator is energized, a magnetic field can be generated. The rotor can rotate relative to the stator under the action of the magnetic field. The transmission shaft 22 is fixedly connected to the rotor. When the rotor rotates, it can drive the transmission shaft 22 and the needle 1 to rotate synchronously. When the rotor rotates, the magnetic field will change. The Hall sensor can detect the change of the magnetic field and convert this change into a measurable electrical signal. After the electrical signal is processed by the sensor circuit board, the rotation angle value of the rotor is obtained. Therefore, the rotation angle of the needle 1 can be indirectly detected by detecting the rotation angle of the rotor.

[0055] Furthermore, the sensor circuit board is electrically connected to the main circuit board 25. A signal output port is provided on the sensor circuit board, and a signal input port is provided on the main circuit board 25. There is an electrical connection between the signal input port and the signal output port. The sensor circuit board transmits the rotation angle value data to the main circuit board 25 through the signal input port and the signal output port. When the angle amplitude value detected by the Hall sensor 27 deviates from the preset angle amplitude value, the angle amplitude value of the needle 1 can be adjusted through the main circuit board 25.

[0056] In one embodiment, please refer to Figure 1 , a power supply member 28 is further provided in the handle body 2. The power supply member 28 is electrically connected to the main circuit board 25, and the power supply member 28 is used to supply power to the handle structure 100.

[0057] Furthermore, the handle housing 26 has an installation wall surface 261. The first control unit 23 and the second control unit 24 are sequentially arranged on the installation wall surface 261 along the axis direction of the handle body 2; the driving member 21, the angle sensor assembly, and the power supply member 28 are sequentially arranged in the handle housing 26 along the axis direction of the handle body 2; the main circuit board 25 is located between the installation wall surface 261 and the power supply member 28, and the main circuit board 25 extends along the axis direction of the handle body 2. The power supply member 28, the driving member 21, the sensor circuit board, the first control unit 23, and the second control unit 24 are arranged around the outer periphery of the main circuit board 25, and the power supply member 28, the driving member 21, the sensor circuit board, the first control unit 23, and the second control unit 24 are all arranged adjacent to the main circuit board 25, which can reduce the wire length between the main circuit board 25 and the surrounding electrical components. The layout of the handle structure 100 is compact and reasonable, which is conducive to the miniaturization of the volume of the handle structure 100.

[0058] According to an embodiment of the present invention, a dental device is further provided, including the handle structure 100 as described above.

[0059] The dental device is provided with a driving member 21, a transmission shaft 22, a first control unit 23, a second control unit 24 and a main circuit board 25. The driving member 21, the first control unit 23 and the second control unit 24 are all electrically connected to the main circuit board 25. One end of the transmission shaft 22 is fixedly connected to the needle 1, and the other end is connected to the driving member 21. The transmission shaft 22 has a central axis. The driving member 21 is used to drive the transmission shaft 22 to drive the needle 1 to rotate reciprocally around the central axis; the first control unit 23 is used to switch the frequency of the reciprocal rotation of the needle 1, and the second control unit 24 is used to switch the angular amplitude of the reciprocal rotation of the needle 1. Doctors can adjust the frequency and angular amplitude of the reciprocal rotation of the needle 1 according to different surgical conditions such as the length, thickness, and shape of the root canal. The motion parameters of the reciprocal rotation of the needle 1 are diversified, which can meet various irrigation needs of doctors; in addition, when the needle 1 rotates, by setting appropriate rotation frequency and angular amplitude, a stronger shear force and acoustic streaming effect can be generated during the irrigation of the root canal, which helps to effectively remove debris and smear layer in the root canal and improve the effect of root canal irrigation; in addition, the frequency and angular amplitude of the reciprocal rotation of the needle 1 are controlled by buttons, and the adjustment of the rotation frequency and angular amplitude of the needle 1 is simple and convenient.

[0060] Obviously, the embodiments described above are only part of the embodiments of the present application, rather than all of the embodiments. The drawings of the present application show preferred embodiments, but do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or perform equivalent replacements on some of the technical features. Any equivalent structure directly or indirectly using the content of the specification and drawings of the present application in other related technical fields shall be within the scope of the patent protection of the present application by the same token.

Claims

1. A handle structure, characterized in that, It includes a needle and a handle body; The needle is provided at one end of the handle body; The handle body includes a driving member, a transmission shaft, a first control unit, a second control unit and a main circuit board. The driving member, the first control unit and the second control unit are all electrically connected to the main circuit board. One end of the transmission shaft is fixedly connected to the needle, and the other end is connected to the driving member. The transmission shaft has a central axis, and the driving member is used to drive the transmission shaft to drive the needle to rotate reciprocally around the central axis; The first control unit is used to switch the frequency of the reciprocal rotation of the needle, and the second control unit is used to switch the angular amplitude of the reciprocal rotation of the needle.

2. The handle structure according to claim 1, wherein, A frequency gear module and a power adjustment module are provided on the main circuit board; The frequency gear module includes at least two different frequency gears, and the first control unit is used to switch the frequency gears; The power adjustment module can control the input power of the driving member according to the frequency gear selected by the first control unit, thereby controlling the frequency of the reciprocal rotation of the needle.

3. The handle structure according to claim 1, characterized in that, An amplitude gear module and a time adjustment module are also provided on the main circuit board; The amplitude gear module includes at least two different amplitude gears, and the second control unit is used to switch the amplitude gears; The time adjustment module can control the rotation time of the driving member within a single reciprocal rotation cycle according to the amplitude gear selected by the second control unit, thereby controlling the angular amplitude of the reciprocal rotation of the needle.

4. The handle structure according to claim 1, characterized in that, The handle body further includes a handle housing. A gripping portion is provided on the handle housing. The gripping portion is located on the side of the handle housing close to the needle, and the first control unit and the second control unit are provided on the side of the handle housing away from the needle.

5. The handle structure according to claim 1, characterized in that, A needle connection portion is provided on the side of the transmission shaft close to the needle. The needle connection portion protrudes from the handle body, and the needle is detachably fixed on the needle connection portion.

6. The handle structure according to claim 5, wherein, The needle connection portion is a linear structure, the needle is a bent needle, the needle has a straight section and an arc section connected to each other, and the straight section is detachably connected to the needle connection portion; Alternatively, the needle is a straight needle, the needle connection portion has a first straight section and a second straight section connected to each other, the included angle between the first straight section and the second straight section is an obtuse angle, the second straight section is located on the side of the needle connection portion away from the driving member, and the second straight section is detachably connected to the needle.

7. The handle structure according to any one of claims 1 to 6, characterized in that, The handle body further includes an angle sensor assembly. The angle sensor assembly is disposed adjacent to the driving member, and the angle sensor assembly is used to detect the rotation angle of the needle.

8. The handle structure according to claim 7, characterized in that The angle sensor assembly includes a sensor and a sensor circuit board. The sensor is fixed on the sensor circuit board. The sensor circuit board is fixed at one end of the driving member away from the transmission shaft, and the sensor circuit board is electrically connected to the main circuit board.

9. The handle structure according to claim 1, characterized in that, A power supply member is further provided in the handle body. The power supply member is electrically connected to the main circuit board, and the power supply member is used to supply power to the handle structure.

10. A dental device, characterized in that, Comprising the handle structure according to any one of claims 1 to 9.

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