Dental crown repair device

Abstract

The utility model relates to the technical field of medical equipment, and discloses a dental crown repairing device which comprises a drill bit, a clamping component and a fixing component, a containing cavity is formed in the fixing assembly, the clamping assembly is arranged in the containing cavity and connected with the fixing assembly, the drill bit extends into the containing cavity and is detachably connected with the clamping assembly, and the drill bit can be driven to rotate through the containing cavity of the fixing assembly so as to polish a dental crown. Meanwhile, the drill bit and the fixing assembly can be detached through the detachable clamping assembly, drill bits of different sizes can be replaced according to needs in actual use, the drill bit with high grinding efficiency is selected when rough grinding is needed, and the drill bit with more accurate grinding is replaced when accurate grinding is needed; the technical problem that in the prior art, a single-size grinding head cannot meet efficient grinding and accurate grinding at the same time is solved, and the technical effect of meeting efficient grinding and accurate grinding at the same time is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a tooth crown repair device. Background Art

[0002] Nowadays, teeth are a very noticeable aspect of human appearance. Having white teeth can effectively improve personal image in interpersonal communication and also express respect for others.

[0003] In clinical practice, when a patient is given a porcelain post crown, the residual crown needs to be polished and repaired first. A dental grinder is a device specifically used for grinding teeth, which usually includes a control box and a grinder handle. The front end of the grinder handle has a grinding head, and the teeth are polished by the grinding head to achieve grinding and repair of the residual crown. However, when the operator holds the grinder handle and uses the grinding head to grind the teeth, a single-sized grinding head cannot meet the requirements of efficient grinding and precise grinding at the same time, resulting in lower grinding efficiency of smaller-sized grinding heads and inaccurate grinding of larger-sized grinding heads. Utility Model Content

[0004] The utility model aims to provide a dental crown repair device to solve the technical problem that a single-sized grinding head in the prior art cannot simultaneously meet the requirements of efficient grinding and precise grinding.

[0005] In order to solve the above technical problems, the utility model provides a dental crown repair device, including: a drill bit, a clamping assembly and a fixing assembly;

[0006] The fixing assembly is provided with an accommodating cavity, the clamping assembly is arranged in the accommodating cavity and connected to the fixing assembly, and the drill bit extends into the accommodating cavity and is detachably connected to the clamping assembly.

[0007] In an optional embodiment, the fixing assembly includes a fixing head and a fixing hole;

[0008] The fixing hole is arranged at one end of the fixing head, the axis of the fixing head is arranged to coincide with the axis of the fixing hole, and one end of the drill bit extends into the fixing hole and is connected to the fixing head.

[0009] In an optional embodiment, the clamping assembly is disposed in the fixing hole, and the clamping assembly is connected to the fixing head.

[0010] In an optional embodiment, the clamping assembly includes a clamping ball and an elastic member;

[0011] Two ends of the elastic member are respectively connected to the clamping ball and the fixed head, and the elastic member has a movement tendency to make the clamping ball press the drill bit.

[0012] In an optional embodiment, a mounting groove is provided in the fixing hole, an opening is provided on one side of the mounting groove, one side of the locking ball extends into the fixing hole through the opening, and both ends of the elastic member are respectively in contact with the locking ball and the mounting groove.

[0013] In an optional embodiment, a handle body is further included, and the handle body is rotatably connected to the fixing assembly.

[0014] In an optional embodiment, the handle body includes a housing, a driving member and a transmission assembly;

[0015] The driving member is arranged in the housing, the transmission assembly is rotatably connected to the housing, and the driving member is connected to the fixing assembly through the transmission assembly.

[0016] In an optional embodiment, the transmission assembly includes a first transmission shaft, a second transmission shaft, a first gear and a second gear;

[0017] The first transmission shaft and the second transmission shaft are arranged perpendicular to each other, and the first transmission shaft and the second transmission shaft are respectively rotatably connected to the outer shell. A first gear is provided at one end of the first transmission shaft close to the second transmission shaft, and a second gear is provided at one end of the second transmission shaft close to the first transmission shaft, and the first gear and the second gear are meshingly connected.

[0018] In an optional embodiment, a fixing protrusion is provided on the inner wall of the housing, and a clamping groove is provided on the fixing assembly;

[0019] The fixing protrusion is arranged along the circumferential extension of the first transmission shaft, the clamping groove is arranged along the circumferential extension of the fixing assembly, and the fixing protrusion and the clamping groove are clamped.

[0020] In an optional embodiment, a protective cover is also included;

[0021] The protective cover is wound around the fixing assembly, the protective cover is connected to the shell, and the diameter of the protective cover is arranged to increase in a direction approaching the patient.

[0022] The utility model provides a dental crown repair device, comprising: a drill bit, a clamping assembly and a fixing assembly; a containing cavity is arranged in the fixing assembly, the clamping assembly is arranged in the containing cavity and is connected to the fixing assembly, the drill bit extends into the containing cavity and is detachably connected to the clamping assembly, the drill bit can be driven to rotate through the containing cavity of the fixing assembly to grind the dental crown, and the drill bit and the fixing assembly can be disassembled through the detachable clamping assembly, and drill bits of different sizes can be replaced as needed in actual use, a drill bit with higher grinding efficiency can be selected when rough grinding is required, and a drill bit with more precise grinding can be replaced when fine grinding is required, thereby solving the technical problem in the prior art that a single-size grinding head cannot meet both efficient grinding and precise grinding, and achieving the technical effect of both efficient grinding and precise grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a cross-sectional view of the dental crown repair device mentioned in the embodiment of the utility model;

[0024] Figure 2 It is a structural schematic diagram of the dental crown repair device mentioned in the embodiment of the utility model;

[0025] Figure 3 This is another cross-sectional view of the dental crown repair device mentioned in the embodiment of the present utility model.

[0026] In the figure, 1-drill bit; 2-fixing head; 3-fixing hole; 4-clamping ball; 5-elastic member; 6-mounting groove; 7-housing; 8-first section housing; 9-second section housing; 10-driving member; 11-first transmission shaft; 12-first gear; 13-first fixing plate; 14-second transmission shaft; 15-second gear; 16-second fixing plate; 17-fixing protrusion; 18-protective cover; 19-handle. DETAILED DESCRIPTION

[0027] The following is a further detailed description of the specific implementation of the present utility model in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present utility model, but are not intended to limit the scope of the present utility model.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the related art, a dental grinder is a device specially used for grinding teeth, usually including a control box and a grinder handle. The front end of the grinder handle is provided with a grinding head, and the teeth are grinded by the grinding head to achieve grinding and repair of the residual crown. However, when the operator holds the grinder handle and uses the grinding head to grind the teeth, a single-sized grinding head cannot meet the requirements of efficient grinding and precise grinding at the same time, resulting in lower grinding efficiency of smaller-sized grinding heads and inaccurate grinding of larger-sized grinding heads.

[0030] In view of this, if Figure 1-Figure 3 As shown, some embodiments of the utility model provide a dental crown repair device, including: a drill bit 1, a clamping assembly and a fixing assembly; a receiving cavity is provided in the fixing assembly, the clamping assembly is provided in the receiving cavity and connected to the fixing assembly, and the drill bit 1 extends into the receiving cavity and is detachably connected to the clamping assembly.

[0031] In the above embodiment, the drill bit 1 can be set to be in the shape of a long strip, the cross section of the drill bit 1 extending into the accommodating cavity can be a regular hexagon, the other side of the drill bit 1 used for processing can be set to be conical, the drill bit 1 can be made of metal, and correspondingly, the cross section of the accommodating cavity can be set to be hexagonal, and the fixing component can be cylindrical, the axis of the fixing component can be arranged to coincide with the axis of the drill bit 1, the fixing component can be made of metal, and a clamping component can be provided on the inner wall of the accommodating cavity, and six clamping components can be provided, and one clamping component can be provided on one side wall of each accommodating cavity, and each clamping component can be connected to The drill bit 1 is abutted, and when the drill bit 1 is inserted into the accommodating cavity, the drill bit 1 can squeeze the clamping components on the side wall of each accommodating cavity, so that the multiple clamping components fix the drill bit 1 to prevent the drill bit 1 from falling through the accommodating cavity, and when the fixing component rotates, the fixing component can cooperate with the hexagonal cross-section of the drill bit 1 through the hexagonal cross-section of the accommodating cavity, thereby driving the drill bit 1 to rotate through the fixing component, so that the drill bit 1 can grind the teeth, and when the drill bit 1 needs to be replaced, the drill bit 1 is pulled toward the opening of the accommodating cavity until the drill bit 1 is separated from the multiple clamping components, so that the drill bit 1 can be smoothly taken out of the accommodating cavity, and the replacement of the accommodating cavity is completed.

[0032] Some embodiments of the utility model provide a dental crown repair device, comprising: a drill bit 1, a clamping assembly and a fixing assembly; a accommodating cavity is provided in the fixing assembly, the clamping assembly is provided in the accommodating cavity and is connected to the fixing assembly, the drill bit 1 extends into the accommodating cavity and is detachably connected to the clamping assembly, the drill bit 1 can be driven to rotate through the accommodating cavity of the fixing assembly to grind the dental crown, and the drill bit 1 and the fixing assembly can be disassembled through the detachable clamping assembly. In actual use, drill bits 1 of different sizes can be replaced as needed, and a drill bit 1 with higher grinding efficiency is selected when rough grinding is required, and a drill bit 1 with more precise grinding is replaced when fine grinding is required, thereby solving the technical problem in the prior art that a single-size grinding head cannot meet both efficient grinding and precise grinding, and achieving the technical effect of meeting both efficient grinding and precise grinding.

[0033] In an optional embodiment, the fixing assembly includes a fixing head 2 and a fixing hole 3; the fixing hole 3 is arranged at one end of the fixing head 2, the axis of the fixing head 2 is arranged to coincide with the axis of the fixing hole 3, and one end of the drill bit 1 extends into the fixing hole 3 and is connected to the fixing head 2.

[0034] In the above embodiment, the cross-section of the fixing hole 3 is hexagonal, the axis of the fixing hole 3 coincides with the axis of the fixing head 2, the fixing hole 3 is provided on the side of the fixing head 2 facing the patient, and the side of the fixing head 2 close to the patient can be provided with an arc surface, and one end of the drill bit 1 extends into the fixing hole 3 and is detachably connected through the clamping assembly on the side wall of the fixing hole 3.

[0035] In an optional embodiment, the clamping assembly is disposed in the fixing hole 3 , and the clamping assembly is connected to the fixing head 2 .

[0036] In the above embodiment, a plurality of clamping assemblies can be provided, and the plurality of clamping assemblies are evenly arranged along the circumference of the fixing hole 3. The clamping assemblies are arranged at the midline position of the fixing hole 3 whose cross section is a regular hexagon. The clamping assemblies can extend into and retract into the fixing hole 3. Each clamping assembly is used to fix the drill bit 1. When the drill bit 1 is inserted into the fixing hole 3, the drill bit 1 first slides along the inner wall of the fixing hole 3 and penetrates into the fixing hole 3, and then contacts the clamping assemblies on the side walls of the fixing hole 3 so that the clamping assemblies are compressed. A plurality of clamping assemblies are slidably connected along the side walls of the drill bit 1, and then the drill bit 1 continues to penetrate. When the drill bit 1 reaches the preset position, the insertion of the drill bit 1 is stopped. At this time, the drill bit 1 is respectively clamped on the six sides of the drill bit 1 through six clamping assemblies. Further, when the fixing head 2 rotates, the fixing hole 3 rotates accordingly. At this time, the six clamping assemblies in the circumference of the drill bit 1 can be compressed again, and then the side walls in the fixing hole 3 can contact the drill bit 1, thereby driving the drill bit 1 to start rotating through the fixing hole 3.

[0037] Optionally, the cross-section of the side of the drill bit 1 extending into the fixing hole 3 may also be a regular hexagonal shape, and the outer surface of the side of the drill bit 1 extending into the fixing hole 3 may be provided with six recesses along the circumference of the drill bit 1, and each recess is respectively arranged to be recessed downward along the surface of the drill bit 1, and each recess can be arranged corresponding to a clamping component, so that when the drill bit 1 is extended into the fixing hole 3, the end face of the drill bit 1 first abuts against the six clamping components to compress the six clamping components, and then when the drill bit 1 is extended to a preset depth, each clamping component can be respectively clamped with a recess, so that the fixation of the drill bit 1 is more stably and the clamping position is more certain.

[0038] In an optional embodiment, the clamping assembly includes a clamping ball 4 and an elastic member 5; two ends of the elastic member 5 are respectively connected to the clamping ball 4 and the fixed head 2, and the elastic member 5 has a movement tendency to make the clamping ball 4 press the drill bit 1.

[0039] In the above embodiment, the card ball 4 can be round or a combination of a spherical side and a cylindrical side. The arc side portion of the card ball 4 extends into the fixing hole 3, and the other side of the card ball 4 is connected to the elastic member 5 and fixed on the fixing head 2. The elastic member 5 has a movement tendency to make the card ball 4 close to the axis of the fixing head 2. The elastic member 5 can be a spring. The length direction of each elastic member 5 is set along the direction toward the axis. When the drill bit 1 is extended, the drill bit 1 contacts with multiple card balls 4 on the side respectively, and then the drill bit 1 squeezes the multiple card balls 4, and the multiple card balls 4 squeeze the elastic member 5 respectively, so that each card ball 4 moves along the axis direction away from the fixing head 2, so that the multiple elastic members 5 are compressed, and the multiple card balls 4 are squeezed toward the surface of the drill bit 1 under the action of the elastic member 5. In the process of the drill bit 1 extending into the fixing hole 3, the surface of the drill bit 1 can be slidably connected with the multiple card balls 4 respectively, so that the drill bit 1 can reach a preset depth, and the drill bit 1 can be fixed in the fixing hole 3 by the multiple elastic members 5 and the card balls 4.

[0040] In an optional embodiment, a mounting groove 6 is provided in the fixing hole 3, an opening is provided on one side of the mounting groove 6, one side of the locking ball 4 extends into the fixing hole 3 through the opening, and both ends of the elastic member 5 abut against the locking ball 4 and the mounting groove 6 respectively.

[0041] In the above embodiment, six mounting grooves 6 may be provided, and the six mounting grooves 6 are evenly arranged along the circumference of the fixing hole 3, so that a mounting groove 6 is provided on each side of the fixing hole 3, and each mounting groove 6 is used to fix an elastic member 5 and a card ball 4, and the opening of each mounting groove 6 is toward the axis of the fixing hole 3, so that each mounting groove 6 is connected to the fixing hole 3 through the opening, wherein, Figure 3As shown, the internal width of each mounting groove 6 is greater than the width of the opening, and the opening of the mounting groove 6 can be circular or rectangular, and the size of the opening is smaller than the maximum diameter of the arc surface of the clamping ball 4, so that part of the arc surface of the clamping ball 4 can extend into the fixing hole 3 through the opening, so that the clamping ball 4 contacts the drill bit 1, and an elastic member 5 is provided on the side of the clamping ball 4 away from the drill bit 1, and the side of the elastic member 5 away from the clamping ball 4 is fixed on the inner wall of the mounting groove 6, wherein a connecting hole for fixing the elastic member 5 can be provided on the inner wall of the mounting groove 6, and the connecting hole is cylindrical, and the elastic member 5 penetrates into the connecting hole and is connected to the connecting hole, so that the elastic member 5 is connected to the connecting hole, thereby preventing the elastic member 5 from moving or flipping during use, causing the elastic member 5 to fail.

[0042] In an optional embodiment, it also includes a handle body, which is rotatably connected to the fixing assembly.

[0043] In the above embodiment, the handle body can be made of plastic or metal. A fixing head 2 is provided at one end of the handle body. The diameter of the fixing head 2 is smaller than the diameter of the handle body. The fixing head 2 extends into the end face of the handle body and is rotatably connected to the handle body. The fixing head 2 is driven to rotate by the handle body, so that the fixing head 2 drives the drill bit 1 to rotate, thereby completing the grinding of the patient's dental crown.

[0044] In an optional embodiment, the handle body includes a housing 7, a drive member 10 and a transmission assembly; the drive member 10 is disposed in the housing 7, the transmission assembly is rotationally connected to the housing 7, and the drive member 10 is connected to the fixed assembly via the transmission assembly.

[0045] In the above embodiment, the shell 7 can be cylindrical with a hollow interior, and a driving member 10 and a transmission assembly can be arranged on the inner wall of the shell 7. The two ends of the transmission assembly are respectively connected to the driving member 10 and the fixed head 2. The driving member 10 drives the fixed head 2 to rotate relative to the shell 7 by driving the transmission assembly, wherein the driving member 10 can be set as a motor, and the power supply method of the driving member 10 can include a built-in rechargeable battery and an external power supply. The transmission assembly can include gear transmission, shaft transmission and belt transmission. The transmission assembly is rotatably connected to the shell 7 so that the shell 7 can fix the transmission assembly to avoid the transmission assembly moving when the driving member 10 drives the transmission assembly to rotate, resulting in transmission failure.

[0046] In an optional embodiment, the transmission assembly includes a first transmission shaft 11, a second transmission shaft 14, a first gear 12 and a second gear 15; the first transmission shaft 11 and the second transmission shaft 14 are arranged perpendicular to each other, the first transmission shaft 11 and the second transmission shaft 14 are respectively rotatably connected to the outer shell 7, a first gear 12 is provided at one end of the first transmission shaft 11 close to the second transmission shaft 14, a second gear 15 is provided at one end of the second transmission shaft 14 close to the first transmission shaft 11, and the first gear 12 and the second gear 15 are meshingly connected.

[0047] In the above embodiment, the housing 7 is provided with a first section shell 8 and a second section shell 9, the first section shell 8 and the second section shell 9 are arranged vertically and are internally connected, the first transmission shaft 11 and the second transmission shaft 14 are both cylindrical, and the first transmission shaft 11 and the second transmission shaft 14 can be made of metal. The first transmission shaft 11 is sleeved with a first fixing plate 13, which is fixed on the inner wall of the first section shell 8, and the first fixing plate 13 is provided with a through hole rotatably connected to the first transmission shaft 11. The first fixing plate 13 is arranged perpendicular to the first transmission shaft 11, and the axis of the first transmission shaft 11 is arranged parallel to the axis of the first section shell 8, and the second transmission shaft 14 is sleeved with a second fixing plate 16, which is fixed on the inner wall of the second section shell 9, and the second fixing plate 16 is provided with a through hole rotatably connected to the second transmission shaft 14, and the second fixing plate 16 is perpendicular to the second transmission shaft 14. The axis of the second transmission shaft 14 is arranged parallel to the axis of the second section shell 9, so that both the first transmission shaft 11 and the second transmission shaft 14 can be fixed.

[0048] Furthermore, on the end faces of the first transmission shaft 11 and the second transmission shaft 14 that are close to each other, the first transmission shaft 11 is connected to the first gear 12, and the second transmission shaft 14 is connected to the second gear 15. The first gear 12 and the second gear 15 are both configured as helical gears, and the first gear 12 and the second gear 15 are meshed with each other, wherein the first gear 12 and the second gear 15 can be configured as equal-diameter bevel gears, and the driving force of the driving member 10 is transmitted to the second gear 15 and the second transmission shaft 14 through the first transmission shaft 11 and the first gear 12, and then the fixed head 2 is driven to rotate relative to the second section housing 9 through the second transmission shaft 14.

[0049] In an optional embodiment, a fixing protrusion 17 is provided on the inner wall of the outer shell 7, and a snap-in groove is provided on the fixing assembly; the fixing protrusion 17 is arranged along the circumferential extension of the first transmission shaft 11, and the snap-in groove is arranged along the circumferential extension of the fixing assembly, and the fixing protrusion 17 and the snap-in groove are snap-connected.

[0050] In the above embodiment, an opening is provided at one end of the second-section housing 9 away from the first-section housing 8, and the fixed head 2 extends into the opening of the second-section housing 9 and is rotatably connected to the second-section housing 9, wherein a fixing protrusion 17 is provided on the inner wall of the second-section housing 9 at the position where the second-section housing 9 is connected to the fixed head 2, and the fixing protrusion 17 is arranged along the circumferential extension of the inner wall of the second-section housing 9 so that the fixing protrusion 17 is annular, and correspondingly, a groove extending along the fixed circumferential direction is provided on the fixing head 2, and when the fixing head 2 is connected to the second-section housing 9, the groove on the fixing head 2 is snapped into the fixing protrusion 17, so that the fixing head 2 is firmly connected to the second-section housing 9, and when the fixing head 2 can rotate relative to the second-section housing 9, the separation of the fixing head 2 and the second-section housing 9 can be avoided, and it is also ensured that the fixing head 2 can rotate along its own axis, so that the rotation of the drill bit 1 is more stable and the grinding is more precise.

[0051] Optionally, a handle 19 may be provided at one end of the first section shell 8 away from the second section shell 9. The handle 19 may be tightly matched with the inner wall of the first section shell 8 through a steering shaft. The angle of the handle 19 relative to the first section shell 8 may be adjusted through the steering shaft. The operator may hold the handle 19 and grind the patient's dental crown with the drill bit 1, thereby making the grinding angle of the drill bit 1 more diversified and the grinding position more precise and comprehensive.

[0052] In an optional embodiment, a protective cover 18 is further included; the protective cover 18 is wound around the fixing assembly, the protective cover 18 is connected to the housing 7, and the diameter of the protective cover 18 is arranged to increase in a direction approaching the patient.

[0053] In the above embodiment, the protective cover 18 can be made of a transparent material to facilitate the user to observe the patient's oral cavity through the protective cover 18. The protective cover 18 can be made of a plastic material. The protective cover 18 is fixed on the end face of the second section shell 9. The protective cover 18 extends along the circumference of the fixed head 2, and the protective cover 18 is fixedly connected to the second section shell 9. The diameter of the protective cover 18 is arranged to increase in the direction close to the patient, so that the protective cover 18 irradiated on the patient's oral cavity has a larger protection range, avoiding tooth debris or water splashing during grinding, which brings a bad user experience to the patient.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dental crown repair device, characterized in that: include: A drill bit (1), a clamping assembly and a fixing assembly; The fixing component is provided with a receiving cavity, the clamping component is arranged in the receiving cavity and connected to the fixing component, and the drill bit (1) extends into the receiving cavity and is detachably connected to the clamping component.

2. The dental crown repair device according to claim 1, characterized in that: The fixing assembly comprises a fixing head (2) and a fixing hole (3); The fixing hole (3) is arranged at one end of the fixing head (2), the accommodating cavity is arranged in the fixing hole (3), the axis of the fixing head (2) and the axis of the fixing hole (3) are arranged to coincide with each other, and one end of the drill bit (1) extends into the fixing hole (3) and is connected to the fixing head (2).

3. The dental crown repair device according to claim 2, characterized in that: The clamping assembly is arranged in the fixing hole (3), and the clamping assembly is connected to the fixing head (2).

4. The dental crown repair device according to claim 3, characterized in that: The clamping assembly comprises a clamping ball (4) and an elastic member (5); The two ends of the elastic member (5) are respectively connected to the clamping ball (4) and the fixed head (2), and the elastic member (5) has a movement tendency to cause the clamping ball (4) to press the drill bit (1).

5. The dental crown repair device according to claim 4, characterized in that: The fixing hole (3) is provided with a mounting groove (6), one side of the mounting groove (6) is provided with an opening, one side of the clamping ball (4) extends into the fixing hole (3) through the opening, and the two ends of the elastic member (5) are respectively in contact with the clamping ball (4) and the mounting groove (6).

6. The dental crown repair device according to any one of claims 1 to 5, characterized in that: It also includes a handle body, which is rotatably connected to the fixing assembly.

7. The dental crown repair device according to claim 6, characterized in that: The handle body comprises a housing (7), a driving member (10) and a transmission assembly; The driving member (10) is arranged in the housing (7), the transmission assembly is rotationally connected to the housing (7), and the driving member (10) is connected to the fixing assembly via the transmission assembly.

8. The dental crown repair device according to claim 7, characterized in that: The transmission assembly comprises a first transmission shaft (11), a second transmission shaft (14), a first gear (12) and a second gear (15); The first transmission shaft (11) and the second transmission shaft (14) are arranged perpendicular to each other; the first transmission shaft (11) and the second transmission shaft (14) are respectively rotatably connected to the housing (7); a first gear (12) is provided at one end of the first transmission shaft (11) close to the second transmission shaft (14); a second gear (15) is provided at one end of the second transmission shaft (14) close to the first transmission shaft (11); and the first gear (12) and the second gear (15) are meshingly connected.

9. The dental crown repair device according to claim 8, characterized in that: A fixing protrusion (17) is provided on the inner wall of the housing (7), and a clamping groove is provided on the fixing component; The fixing protrusion (17) is arranged along the circumference of the first transmission shaft (11), the clamping groove is arranged along the circumference of the fixing assembly, and the fixing protrusion (17) and the clamping groove are clamped.

10. The dental crown repair device according to claim 7, characterized in that: Also includes a protective cover (18); The protective cover (18) is wound around the fixing assembly, the protective cover (18) is connected to the outer shell (7), and the diameter of the protective cover (18) is arranged to increase in a direction approaching the patient.

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