CN108186139B

CN108186139B - Tooth cutting mechanism of area protection

Info

Publication number: CN108186139B
Application number: CN201711420343.3A
Authority: CN
Inventors: 王杰
Original assignee: Suzhou Dental Hospital Co ltd
Current assignee: SUZHOU DENTAL HOSPITAL Co.,Ltd.
Priority date: 2017-12-25
Filing date: 2017-12-25
Publication date: 2020-09-08
Anticipated expiration: 2037-12-25
Also published as: CN108186139A

Abstract

The invention belongs to the technical field of tooth cutting, and particularly relates to a tooth cutting mechanism with protection, which comprises a protective cover, a first rotating shaft, a cutting wheel, an installation shell, a trigger arc plate and a driving motor, wherein when people use the tooth cutting mechanism designed by the invention, the driving motor drives an eighth rotating shaft to rotate, and when a seventh gear is blocked, the eighth rotating shaft rotates to drive a fourth rotating shaft to rotate; the fourth rotating shaft rotates to enable the cutting wheel to rotate; namely, the cutting wheel works; when the cutting wheel is in operation, if a user carelessly presses the tongue against the cutting wheel or closes the mouth, the tooth cutting mechanism can protect the oral cavity or the gum of the patient when the patient carelessly closes the mouth or presses the tongue against the cutting wheel through automatic adjustment.

Description

Tooth cutting mechanism of area protection

Technical Field

The invention belongs to the technical field of tooth cutting, and particularly relates to a tooth cutting mechanism with protection.

Background

Currently, in the plastic dental surgery, a doctor cuts or grinds teeth by using a dental straight handpiece. In the cutting and polishing process, if a patient closes the mouth carelessly, the cutting wheel can cause mistaken injuries to the oral cavity or the gum; this has an impact on the health of the patient; it is therefore desirable to design a tooth cutting mechanism that provides protection to the patient's mouth or gums during the cutting or grinding of the teeth if the patient inadvertently closes his mouth.

The invention designs a tooth cutting mechanism with protection to solve the problems.

Disclosure of Invention

In order to solve the defects in the prior art, the invention discloses a tooth cutting mechanism with protection, which is realized by adopting the following technical scheme.

The utility model provides a tooth cutting mechanism of area protection which characterized in that: the device comprises a shield, a first rotating shaft, a cutting wheel, an installation shell, a trigger arc plate, a second rotating shaft, a first gear, a guide square hole, a third rotating shaft, a second gear, a third gear, a fourth rotating shaft, a driving motor, a battery, an electric wire, a fifth rotating shaft, a fifth gear, a sixth rotating shaft, a sixth gear, a seventh gear, a centrifugal gear, a seventh rotating shaft, an eighth rotating shaft, an installation semicircular plate, a first guide groove, a charging port, a first guide groove, a second guide groove, a shaft hole, a second guide groove, a first guide hole, a first compression spring, a guide rack, an extension spring, a spring fixing plate, a first trigger rod, a swinging rod, a first connecting rod, a first support, a second connection, a third support, a connection square block, a second trigger rod, a limiting rod, a guide support, a fourth support, a charging head, a first rotating shaft, a trigger block, a swinging shaft, a guide square hole, a guide square hole, The device comprises a first reset spring, a fifth guide support, a pin, a second rotating shaft, a fifth rotating shaft, a first guide block, a third rotating shaft, a third connecting rod, a guide telescopic rod, a limiting ring, a limiting groove, a third reset spring, a second guide block, a mounting shaft hole, a sixth support, a seventh support, an eighth support and a seventh rotating shaft, wherein one end of a mounting shell is provided with a charging port which is communicated with the inner side of the mounting shell; the other end of the mounting shell is provided with a shaft hole which is communicated with the inner side of the mounting shell; one end of the mounting shell, which is provided with the shaft hole, is provided with a first guide groove and a second guide groove which are communicated with the inner side of the mounting shell; four guide square holes are formed in the outer circular surface of the mounting shell; every two of the four guiding square holes are uniformly distributed on the outer circular surface of the mounting shell in a group in the circumferential direction, and the two guiding square holes in the same group are mutually symmetrical; the semicircular surface of the mounting semicircular plate is arranged on the inner circular surface of the mounting shell and is positioned at one end, close to the shaft hole, in the mounting shell; a first guide hole is formed in the end face of the mounting semicircular surface in the transverse direction; a first guide groove is formed in the end face of the mounting semicircular surface in the longitudinal direction; one end of the battery is provided with two symmetrical charging heads; the battery is arranged at one end close to the charging port in the mounting shell; a charging head on the battery is matched with the charging port; the driving motor is arranged on the inner side of the mounting shell and is close to the battery; an electric wire is connected between the driving motor and the battery; one end of the eighth rotating shaft is provided with bevel teeth; the other end of the eighth rotating shaft is arranged on the rotating shaft of the driving motor; both ends of the fourth rotating shaft are provided with bevel teeth; the fourth rotating shaft is arranged on the inner side of the mounting shell through the first support; the fourth rotating shaft is meshed with the eighth rotating shaft through bevel teeth; both ends of the seventh rotating shaft are provided with bevel teeth; the seventh rotating shaft is arranged on the inner side of the mounting shell through a fourth support; the seventh rotating shaft is meshed with the fourth rotating shaft through bevel teeth; one end of the first rotating shaft is provided with bevel teeth; the other end of the first rotating shaft is arranged on the end surface of the mounting semicircular surface; the first rotating shaft and the seventh rotating shaft are in meshing connection through bevel teeth; the fourth gear is arranged on the first rotating shaft; one end of the second rotating shaft is arranged on the end face of the mounting semicircular face; the third gear is arranged on the second rotating shaft; the third gear is meshed with the fourth gear; one end of the fifth rotating shaft is provided with a first guide block; the fifth rotating shaft is arranged on the end face of the installation semicircular surface through the matching of the first guide block and the first guide groove; a first return spring is arranged between the first guide block and the first guide groove; one end of the seventh gear is provided with a limit ring; the outer circular surface of the limiting ring is provided with a limiting groove; the seventh gear is arranged on the fifth rotating shaft; the seventh gear is meshed with the third gear; one end of the third rotating shaft is arranged on the end surface of the mounting semicircular surface; the second gear is arranged on the third rotating shaft; the second gear is meshed with the seventh gear; one end of the fourth rotating shaft is arranged on the end surface of the mounting semicircular surface; the first gear is arranged on the fourth rotating shaft; the first gear is meshed with the second gear; one end of the sixth rotating shaft is arranged on the end surface of the mounting semicircular surface; the fifth gear is arranged on the sixth rotating shaft; the fifth gear is meshed with the first gear; one end of the third rotating shaft is provided with bevel teeth; the other end of the third rotating shaft is provided with a second guide block; the third rotating shaft is arranged on the end face of the installation semicircular surface through the matching of the second guide block and the second guide groove; a third return spring is arranged between the second guide block and the second guide groove; the sixth gear is arranged on the third rotating shaft; the sixth gear is meshed with the fifth gear; the eighth support is arranged at one end of the third rotating shaft, which is provided with bevel teeth; one end of the connecting block is provided with a through mounting shaft hole; the connecting block is arranged on the eighth supporting block; both ends of the sixth rotating shaft are provided with bevel teeth; the sixth rotating shaft is arranged on the connecting square block through the mounting shaft hole; the sixth rotating shaft is meshed with the third rotating shaft through bevel teeth; both ends of the fifth rotating shaft are provided with bevel teeth; the fifth rotating shaft is arranged on one side of the connecting block through a seventh support; the fifth rotating shaft is meshed with the sixth rotating shaft through bevel teeth; one end of the third support is arranged on the side surface of the connecting block, which is provided with one end of the seventh support; the sixth support is arranged on the side surface of the other end of the third support; both ends of the second rotating shaft are provided with bevel teeth; the second rotating shaft is arranged on the sixth support; the second rotating shaft is meshed with the fifth rotating shaft through bevel teeth; one end of the first rotating shaft is provided with bevel teeth; one end of the first rotating shaft with the bevel gear penetrates through a shaft hole in the mounting shell and is positioned in the mounting shell; the first rotating shaft and the second rotating shaft are meshed and connected through bevel teeth; the second support is arranged at one end of the first rotating shaft, which is provided with bevel teeth; the second support is connected with the third support through a second connection; the cutting wheel is arranged at the other end of the first rotating shaft; one end of the swinging shaft is arranged on the end surface of the mounting semicircular surface and is close to the shaft hole on the mounting shell; two pin holes are respectively formed at two ends of the swinging rod; the swinging rod is arranged on the mounting shell through the matching of one of the two pin holes and the swinging shaft; one end of the swinging rod matched with the swinging shaft penetrates through the first guide groove on the mounting shell and is positioned outside the mounting shell; a trigger block is arranged on the lower circular surface at one end of the protective cover; the trigger block is provided with an inclined plane; one end of the protective cover, which is provided with the trigger block, is arranged at one end of the swinging rod, which is positioned at the outer side of the mounting shell; the third connecting rod is arranged on the inner side of the mounting shell through a guide support; one end of the third connecting rod is connected with one end of the fifth rotating shaft, which is not provided with the first guide block; one end of the third connecting rod is provided with a first connecting rod; a pin is arranged on the first connecting rod; the first connecting rod is connected with the swinging rod through the matching of the pin and another pin hole on the swinging rod; the fifth guide support is arranged on the inner side of the mounting shell; both ends of the first trigger rod are provided with inclined planes; the first trigger rod is arranged on the fifth guide support; one end of a fifth trigger rod penetrates through a second guide groove in the mounting shell, is positioned on the outer side of the mounting shell and is matched with the inclined plane on the trigger block; the spring fixing plate is arranged on the fifth trigger rod; an extension spring is arranged between the spring fixing plate and the end face of one side, close to the protective cover, in the mounting shell; one side of the limiting rod is provided with a guiding telescopic rod; the limiting rod is arranged in the mounting shell through the guiding telescopic rod; one end of the limiting rod is matched with the limiting groove on the limiting ring; one side of the second trigger rod is provided with an inclined plane; one end of the second trigger rod is arranged on the limiting rod; the other end of the second trigger rod is matched with the inclined plane on the first trigger rod; two guide racks are symmetrically arranged on the inner arc surface of the trigger arc plate; the two trigger arc plates are symmetrically arranged on the outer circular surface of the mounting shell through the matching of the corresponding guide racks and the corresponding first guide holes on the mounting shell; two first compression springs are respectively arranged on the two trigger arc plates and the outer circular surface of the mounting shell; the two first compression springs are respectively positioned at two sides of the corresponding trigger arc plate; the two seventh rotating shafts are respectively arranged on the end surfaces of the two sides of one end, close to the driving motor, of the installation semicircular plate; the two centrifugal gears are respectively arranged on the two seventh rotating shafts; the two centrifugal gears are respectively matched with the corresponding guide racks; the two centrifugal gears are respectively matched with the fourth gear.

As a further improvement of the technology, the centrifugal gear comprises a centrifugal wheel, centrifugal teeth, a centrifugal spring and centrifugal grooves, wherein a plurality of centrifugal grooves are uniformly formed in the middle of the outer circular surface of the centrifugal wheel in the circumferential direction; teeth are arranged on the outer circular surface of the centrifugal wheel which is not provided with the two ends of the centrifugal groove; the centrifugal wheels are arranged on the corresponding seventh rotating shafts; each centrifugal groove is internally provided with a centrifugal tooth; a centrifugal spring is respectively arranged between each centrifugal tooth and the bottom end face of the corresponding centrifugal groove; the centrifugal teeth arranged on the centrifugal wheel are matched with the fourth gear; teeth on the outer circular surfaces of two ends of the centrifugal wheel are meshed with the guide rack.

As a further improvement of the technology, the guiding telescopic rod comprises a guiding inner rod, a second return spring and a guiding outer sleeve, wherein one end of the guiding outer sleeve is provided with a guiding installation groove; one end of the guide outer sleeve, which is not provided with the guide mounting groove, is arranged on the inner circular surface of the mounting shell; one end of the guide inner rod is arranged in a guide mounting groove on the guide outer sleeve; a second return spring is arranged between one end of the guide inner rod positioned in the guide mounting groove and the bottom end of the guide mounting groove; the other end of the guide inner rod is connected with the limiting rod.

As a further improvement of the present technology, in the process that the third gear drives the seventh gear to rotate; the third gear can provide thrust for teeth on the seventh gear, which are in contact with the third gear; the thrust direction is the same as the guide direction of the first guide groove.

As a further improvement of the present technology, the first rotating shaft and the first support are connected by a bearing; the second rotating shaft is connected with the sixth support through a bearing; the fifth rotating shaft is connected with the seventh support through a bearing; the sixth rotating shaft is arranged in the mounting shaft hole through a bearing; the third rotating shaft is connected with the eighth support through a bearing.

Compared with the traditional tooth cutting technology, the tooth cutting mechanism designed by the invention can protect the oral cavity or the gingiva of a patient when the patient carelessly closes the mouth through automatic adjustment.

One end of the eighth rotating shaft is provided with bevel teeth; the other end of the eighth rotating shaft is arranged on the rotating shaft of the driving motor; both ends of the fourth rotating shaft are provided with bevel teeth; the fourth rotating shaft is arranged on the inner side of the mounting shell through the first support; the fourth rotating shaft is meshed with the eighth rotating shaft through bevel teeth; both ends of the seventh rotating shaft are provided with bevel teeth; the seventh rotating shaft is arranged on the inner side of the mounting shell through a fourth support; the seventh rotating shaft is meshed with the fourth rotating shaft through bevel teeth; one end of the first rotating shaft is provided with bevel teeth; the other end of the first rotating shaft is arranged on the end surface of the mounting semicircular surface; the first rotating shaft and the seventh rotating shaft are in meshing connection through bevel teeth; the fourth gear is arranged on the first rotating shaft; one end of the second rotating shaft is arranged on the end face of the mounting semicircular face; the third gear is arranged on the second rotating shaft; the third gear is meshed with the fourth gear; one end of the fifth rotating shaft is provided with a first guide block; the fifth rotating shaft is arranged on the end face of the installation semicircular surface through the matching of the first guide block and the first guide groove; a first return spring is arranged between the first guide block and the first guide groove; the seventh gear is arranged on the fifth rotating shaft; the seventh gear is meshed with the third gear; one end of the third rotating shaft is arranged on the end surface of the mounting semicircular surface; the second gear is arranged on the third rotating shaft; the second gear is meshed with the seventh gear; one end of the fourth rotating shaft is arranged on the end surface of the mounting semicircular surface; the first gear is arranged on the fourth rotating shaft; the first gear is meshed with the second gear; one end of the sixth rotating shaft is arranged on the end surface of the mounting semicircular surface; the fifth gear is arranged on the sixth rotating shaft; the fifth gear is meshed with the first gear; one end of the third rotating shaft is provided with bevel teeth; the other end of the third rotating shaft is provided with a second guide block; the third rotating shaft is arranged on the end face of the installation semicircular surface through the matching of the second guide block and the second guide groove; a third return spring is arranged between the second guide block and the second guide groove; the sixth gear is arranged on the third rotating shaft; the sixth gear is meshed with the fifth gear; the eighth support is arranged at one end of the third rotating shaft, which is provided with bevel teeth; one end of the connecting block is provided with a through mounting shaft hole; the connecting block is arranged on the eighth supporting block; both ends of the sixth rotating shaft are provided with bevel teeth; the sixth rotating shaft is arranged on the connecting square block through the mounting shaft hole; the sixth rotating shaft is meshed with the third rotating shaft through bevel teeth; both ends of the fifth rotating shaft are provided with bevel teeth; the fifth rotating shaft is arranged on one side of the connecting block through a seventh support; the fifth rotating shaft is meshed with the sixth rotating shaft through bevel teeth; one end of the third support is arranged on the side surface of the connecting block, which is provided with one end of the seventh support; the sixth support is arranged on the side surface of the other end of the third support; both ends of the second rotating shaft are provided with bevel teeth; the second rotating shaft is arranged on the sixth support; the second rotating shaft is meshed with the fifth rotating shaft through bevel teeth; one end of the first rotating shaft is provided with bevel teeth; one end of the first rotating shaft with the bevel gear penetrates through a shaft hole in the mounting shell and is positioned in the mounting shell; the first rotating shaft and the second rotating shaft are meshed and connected through bevel teeth; the second support is arranged at one end of the first rotating shaft, which is provided with bevel teeth; the second support is connected with the third support through a second connection; the cutting wheel is arranged at the other end of the first rotating shaft; the first rotating shaft is connected with the first support through a bearing; the second rotating shaft is connected with the sixth support through a bearing; the fifth rotating shaft is connected with the seventh support through a bearing; the sixth rotating shaft is arranged in the mounting shaft hole through a bearing; the third rotating shaft is connected with the eighth support through a bearing. When the driving motor drives the eighth rotating shaft to rotate and the seventh gear is blocked, the eighth rotating shaft rotates to drive the fourth rotating shaft to rotate; the fourth rotating shaft can drive the seventh rotating shaft to rotate when rotating; the seventh rotating shaft rotates to drive the first rotating shaft to rotate; the first rotating shaft rotates to drive the fourth gear to rotate; the fourth gear rotates to drive the third gear to rotate; the third gear rotates to drive the seventh gear to rotate; the seventh gear rotates to drive the second gear to rotate; the second gear rotates to drive the first gear to rotate; the first gear rotates to drive the fifth gear to rotate; the fifth gear rotates to drive the sixth gear to rotate; the sixth gear rotates to drive the third rotating shaft to rotate; the third rotating shaft rotates to drive the sixth rotating shaft to rotate; the sixth rotating shaft rotates to drive the fifth rotating shaft to rotate; the fifth rotating shaft rotates the second rotating shaft to rotate; the second rotating shaft rotates to drive the first rotating shaft to rotate; the first rotating shaft rotates to drive the cutting wheel to rotate; i.e. the cutting wheel is working. When the cutting wheel works, if a user carelessly presses the tongue against the cutting wheel, the cutting wheel is pushed towards one side of the mounting shell; namely, the cutting wheel can move; the cutting wheel moves to drive the first rotating shaft to move; the first rotating shaft moves to drive the second support to move; the second support drives the second connection to move; the second connecting movement drives the third support to move; the third support moves to drive the connecting square block to move; the connecting block moves to drive the seventh support to move; meanwhile, the third support moves to drive the sixth support to move; the sixth support moves to drive the second rotating shaft to move; the seventh support moves to drive the fifth rotating shaft to move; the connecting block moves to drive the sixth rotating shaft to move; meanwhile, the connecting block moves to drive the eighth support to move; the eighth support moves to drive the third rotating shaft to move towards the second guide groove; the third rotating shaft moves to drive the sixth gear to move; the sixth gear moves to be separated from the fifth gear; namely, the fifth gear does not drive the sixth gear to rotate; namely, the cutting wheel stops rotating; the lower oral cavity is prevented from being cut when the user carelessly pushes the tongue against the cutting wheel; after the use is finished, the third rotating shaft is restored to the original position under the action of the third return spring.

One end of a swinging shaft is arranged on the end surface of the mounting semicircular surface and is close to a shaft hole on the mounting shell; two pin holes are respectively formed at two ends of the swinging rod; the swinging rod is arranged on the mounting shell through the matching of one of the two pin holes and the swinging shaft; one end of the swinging rod matched with the swinging shaft penetrates through the first guide groove on the mounting shell and is positioned outside the mounting shell; a trigger block is arranged on the lower circular surface at one end of the protective cover; the trigger block is provided with an inclined plane; one end of the protective cover, which is provided with the trigger block, is arranged at one end of the swinging rod, which is positioned at the outer side of the mounting shell; the third connecting rod is arranged on the inner side of the mounting shell through a guide support; one end of the third connecting rod is connected with one end of the fifth rotating shaft, which is not provided with the first guide block; one end of the third connecting rod is provided with a first connecting rod; a pin is arranged on the first connecting rod; the first connecting rod is connected with the swinging rod through the matching of the pin and another pin hole on the swinging rod; the fifth guide support is arranged on the inner side of the mounting shell; both ends of the first trigger rod are provided with inclined planes; the first trigger rod is arranged on the fifth guide support; one end of a fifth trigger rod penetrates through a second guide groove in the mounting shell, is positioned on the outer side of the mounting shell and is matched with the inclined plane on the trigger block; the spring fixing plate is arranged on the fifth trigger rod; an extension spring is arranged between the spring fixing plate and the end face of one side, close to the protective cover, in the mounting shell; one side of the limiting rod is provided with a guiding telescopic rod; the limiting rod is arranged in the mounting shell through the guiding telescopic rod; one end of the limiting rod is matched with the limiting groove on the limiting ring; one side of the second trigger rod is provided with an inclined plane; one end of the second trigger rod is arranged on the limiting rod; the other end of the second trigger rod is matched with the inclined plane on the first trigger rod; the guide telescopic rod comprises a guide inner rod, a second reset spring and a guide outer sleeve, wherein one end of the guide outer sleeve is provided with a guide mounting groove; one end of the guide outer sleeve, which is not provided with the guide mounting groove, is arranged on the inner circular surface of the mounting shell; one end of the guide inner rod is arranged in a guide mounting groove on the guide outer sleeve; a second return spring is arranged between one end of the guide inner rod positioned in the guide mounting groove and the bottom end of the guide mounting groove; the other end of the guide inner rod is connected with a limiting rod; the third gear drives the seventh gear to rotate; the third gear can provide thrust for teeth on the seventh gear, which are in contact with the third gear; the thrust direction is the same as the guide direction of the first guide groove. When the cutting wheel is in operation, the upper mouth of the user will contact the shield if the user inadvertently closes his mouth; causing the shield to swing downward; the swinging of the shield on one hand presses the first trigger rod through the trigger block so that the first trigger rod moves towards the side far away from the shield; the first trigger rod moves to enable the extension spring to be forced; meanwhile, the first trigger rod can press the second trigger rod to move towards the side far away from the seventh gear; the second trigger rod moves to drive the limiting rod to move; the guide inner rod can be compressed when the limiting rod moves; so that the guide inner rod compresses the second return spring; the swinging of the protective cover drives the swinging rod to swing; the swinging rod swings to enable the first connecting rod to move towards the side far away from the seventh gear; the first connecting rod moves to drive the third connecting rod to move; when the limiting rod is completely separated from the limiting groove on the limiting ring in the moving process of the limiting rod, the third connecting rod moves to drive the fifth rotating shaft to move towards the first guide groove; the fifth rotating shaft moves to drive the seventh gear to move; meanwhile, the third gear can provide thrust for teeth on the seventh gear, which are in contact with the third gear; the thrust direction is the same as the guiding direction of the first guiding groove; so that the seventh gear is disengaged from the third gear at this time; namely, the third gear does not drive the seventh gear to rotate; namely, the cutting wheel stops rotating; the lower oral cavity is prevented from being cut; after the use is finished, the first trigger rod can be restored to the original position under the action of the extension spring; the seventh gear is in secondary position under the action of the first return spring; the limiting rod is restored to the original position under the action of the second return spring.

Two guide racks are symmetrically arranged on the inner arc surface of the trigger arc plate; the two trigger arc plates are symmetrically arranged on the outer circular surface of the mounting shell through the matching of the corresponding guide racks and the corresponding first guide holes on the mounting shell; two first compression springs are respectively arranged on the two trigger arc plates and the outer circular surface of the mounting shell; the two first compression springs are respectively positioned at two sides of the corresponding trigger arc plate; the two seventh rotating shafts are respectively arranged on the end surfaces of the two sides of one end, close to the driving motor, of the installation semicircular plate; the two centrifugal gears are respectively arranged on the two seventh rotating shafts; the two centrifugal gears are respectively matched with the corresponding guide racks; the two centrifugal gears are respectively matched with the fourth gear; when the cutting wheel works, if a user sneezes or closes the mouth accidentally, the upper oral cavity and the lower oral cavity of the user can squeeze the hands of medical staff, and the hands of the medical staff press the two trigger arc plates, so that the hands of the medical staff can not trigger the trigger arc plates when the medical staff press the two trigger arc plates under normal conditions; but when the trigger arc plate is subjected to an external force; the trigger arc plate moves towards the center of the mounting shell; when the upper oral cavity and the lower oral cavity of the user squeeze hands of medical staff, the trigger arc plate moves towards the center of the mounting shell; the trigger arc plate moves to drive the corresponding guide rack to move; the guide rack moves to enable the centrifugal gear to rotate; the centrifugal gear rotates to enable the centrifugal teeth arranged on the centrifugal gear to move towards the outer side of the centrifugal gear under the centrifugal action; in the moving process of the centrifugal teeth, when the centrifugal teeth are in contact with the teeth on the fourth gear, the trigger arc plate is in a static state, namely the guide teeth are in a static state, and the centrifugal teeth can clamp the fourth gear; i.e. the fourth gear does not rotate; namely, the cutting wheel can not rotate; i.e. to prevent the user from inadvertently sneezing or cutting the lower oral cavity when closing the nozzle.

When people use the tooth cutting mechanism designed by the invention, when the drive motor drives the eighth rotating shaft to rotate and the seventh gear is blocked, the eighth rotating shaft rotates to drive the fourth rotating shaft to rotate; the fourth rotating shaft can drive the seventh rotating shaft to rotate when rotating; the seventh rotating shaft rotates to drive the first rotating shaft to rotate; the first rotating shaft rotates to drive the fourth gear to rotate; the fourth gear rotates to drive the third gear to rotate; the third gear rotates to drive the seventh gear to rotate; the seventh gear rotates to drive the second gear to rotate; the second gear rotates to drive the first gear to rotate; the first gear rotates to drive the fifth gear to rotate; the fifth gear rotates to drive the sixth gear to rotate; the sixth gear rotates to drive the third rotating shaft to rotate; the third rotating shaft rotates to drive the sixth rotating shaft to rotate; the sixth rotating shaft rotates to drive the fifth rotating shaft to rotate; the fifth rotating shaft rotates the second rotating shaft to rotate; the second rotating shaft rotates to drive the first rotating shaft to rotate; the first rotating shaft rotates to drive the cutting wheel to rotate; i.e. the cutting wheel is working.

Drawings

Fig. 1 is an external view of an entire part.

Fig. 2 is a schematic view of the overall component distribution.

Fig. 3 is a schematic view of the internal structure of the integral unit.

Fig. 4 is a schematic view of the internal structure installation of the integral component.

Fig. 5 is a schematic view of the structure of the stationary case.

Fig. 6 is a schematic view of the installation of the semicircular plate.

Fig. 7 is a schematic view of trigger arc plate installation.

Fig. 8 is a schematic view of a guide rack installation.

Fig. 9 is a schematic view of the internal structural distribution of the integral component.

Fig. 10 is a schematic view of the fourth rotating shaft and the seventh gear.

FIG. 11 is a fourth gear mounting schematic.

Fig. 12 is a schematic view of the centrifugal gear and the fourth gear in cooperation.

Fig. 13 is a schematic view of the guide rack and centrifugal gear mating.

Fig. 14 is a schematic view of a centrifugal gear structure.

FIG. 15 is a schematic view of a centrifugal wheel.

FIG. 16 is a schematic view of an eccentric tooth installation.

Fig. 17 is a schematic view of the first and second shafts in cooperation.

Fig. 18 is a cutting wheel installation schematic.

Fig. 19 is a schematic view of the shroud installation.

FIG. 20 is a schematic view of a sway bar installation.

FIG. 21 is a second firing bar installation schematic.

Figure 22 is a schematic view of the stop collar installation.

Fig. 23 is a schematic view of the structure of the guiding telescopic rod.

Fig. 24 is a sixth shaft mounting schematic.

FIG. 25 is a schematic view of a connection block installation.

Number designation in the figures: 1. a shield; 2. a first rotating shaft; 3. a cutting wheel; 4. mounting a shell; 5. triggering an arc plate; 6. a second rotating shaft; 7. a first gear; 8. a third rotating shaft; 9. a second gear; 10. a third gear; 11. a fourth gear; 12. a fourth rotating shaft; 13. a drive motor; 14. a battery; 15. an electric wire; 16. a fifth rotating shaft; 17. a fifth gear; 18. a sixth rotating shaft; 19. a sixth gear; 20. a seventh gear; 21. a centrifugal gear; 22. a seventh rotating shaft; 23. an eighth rotating shaft; 24. installing a semicircular plate; 25. a first guide groove; 26. a charging port; 27. a first guide groove; 28. a second guide groove; 29. a shaft hole; 30. a second guide groove; 31. a first guide hole; 32. a first compression spring; 33. a guide rack; 34. an extension spring; 35. a spring fixing plate; 36. a first trigger lever; 37. a swing lever; 38. a first connecting rod; 39. a first support; 40. a second support; 41. a second connection; 42. a third support; 43. connecting the squares; 44. a second trigger lever; 45. a limiting rod; 46. a guide support; 47. a fourth support; 48. a charging head; 49. a first rotating shaft; 50. a centrifugal wheel; 51. centrifuging the teeth; 52. a centrifugal spring; 53. a centrifugal tank; 54. a trigger block; 55. a swing shaft; 56. a first return spring; 57. a fifth guide support; 58. a pin; 59. a second rotating shaft; 60. a fifth rotating shaft; 61. a first guide block; 62. a third rotating shaft; 63. a fourth rotating shaft; 64. guiding the telescopic rod; 65. a limiting ring; 66. a third connecting rod; 67. a seventh rotating shaft; 68. a limiting groove; 69. guiding an inner rod; 70. a second return spring; 71. a guide housing; 72. a third return spring; 73. a second guide block; 74. installing the shaft hole; 75. a sixth support; 76. a seventh support; 77. an eighth support; 78. a sixth axis of rotation.

Detailed Description

As shown in fig. 1 and 2, the cutting device includes a housing 1, a first rotating shaft 2, a cutting wheel 3, a mounting case 4, a trigger arc plate 5, a second rotating shaft 6, a first gear 7, a guide square hole, a third rotating shaft 8, a second gear 9, a third gear 10, a fourth gear 11, a fourth rotating shaft 12, a driving motor 13, a battery 14, an electric wire 15, a fifth rotating shaft 16, a fifth gear 17, a sixth rotating shaft 18, a sixth gear 19, a seventh gear 20, a centrifugal gear 21, a seventh rotating shaft 22, an eighth rotating shaft 23, a mounting semicircular plate 24, a first guide groove 25, a charging port 26, a first guide groove 27, a second guide groove 28, a shaft hole 29, a second guide groove 30, a first guide hole 31, a first compression spring 32, a guide rack 33, an extension spring 34, a spring fixing plate 35, a first trigger lever 36, a swing lever 37, a first connecting lever 38, a first support 39, a second support 40, and a second connection 41, A third support 42, a connecting block 43, a second trigger lever 44, a limiting lever 45, a guide support 46, a fourth support 47, a charging head 48, a first rotating shaft 49, a trigger block 54, a swinging shaft 55, a first return spring 56, a fifth guide support 57, a pin 58, a second rotating shaft 59, a fifth rotating shaft 60, a first guide block 61, a third rotating shaft 62, a third connecting rod 66, a guide telescopic rod 64, a limiting ring 65, a limiting groove 68, a third return spring 72, a second guide block 73, a mounting shaft hole 74, a sixth support 75, a seventh support 76, an eighth support 77 and a seventh rotating shaft 67, wherein as shown in fig. 5 and 6, one end of the mounting shell 4 is provided with a charging port 26, and the charging port 26 is communicated with the inner side of the mounting shell 4; the other end of the mounting shell 4 is provided with a shaft hole 29, and the shaft hole 29 is communicated with the inner side of the mounting shell 4; the end of the mounting shell 4 provided with the shaft hole 29 is provided with a first guide groove 27 and a second guide groove 28, and the first guide groove 27 and the second guide groove 28 are communicated with the inner side of the mounting shell 4; four guide square holes are formed in the outer circular surface of the mounting shell 4; every two of the four guiding square holes are uniformly distributed on the outer circular surface of the mounting shell 4 in a group in the circumferential direction, and the two guiding square holes in the same group are mutually symmetrical; the semicircular surface of the mounting semicircular plate 24 is arranged on the inner circular surface of the mounting shell 4 and is positioned at one end, close to the shaft hole 29, in the mounting shell 4; as shown in fig. 6, a first guide hole 31 is formed in the end surface of the mounting semicircular surface in the transverse direction; a first guide groove 25 is formed in the end face of the mounting semicircular surface in the longitudinal direction; as shown in fig. 9, one end of the battery 14 has two symmetrical charging heads 48; as shown in fig. 3, the battery 14 is mounted in the mounting case 4 at an end near the charging port 26; a charging head 48 on battery 14 mates with charging port 26; as shown in fig. 4, the driving motor 13 is installed inside the mounting case 4, and the driving motor 13 is close to the battery 14; an electric wire 15 is connected between the driving motor 13 and the battery 14; as shown in fig. 10, one end of the eighth rotating shaft 23 has a tapered tooth; the other end of the eighth rotating shaft 23 is installed on the rotating shaft of the driving motor 13; as shown in fig. 11, both ends of the fourth rotating shaft 12 have tapered teeth; the fourth rotating shaft 12 is mounted inside the mounting case 4 through a first support 39; the fourth rotating shaft 12 is meshed with the eighth rotating shaft 23 through bevel gears; both ends of the seventh rotating shaft 22 are provided with bevel teeth; the seventh rotating shaft 22 is installed inside the installation case 4 through a fourth support 47; the seventh rotating shaft 22 is meshed with the fourth rotating shaft 12 through bevel gears; one end of the first rotating shaft 49 has a bevel gear; the other end of the first rotating shaft 49 is mounted on the end face of the mounting semicircular face; the first rotating shaft 49 is meshed with the seventh rotating shaft 22 through bevel gears; as shown in fig. 9, the fourth gear 11 is mounted on the first rotating shaft 49; one end of the second rotating shaft 59 is mounted on the end surface of the mounting semicircular surface; as shown in fig. 16, the third gear 10 is mounted on the second rotating shaft 59; as shown in fig. 17, the third gear 10 meshes with the fourth gear 11; as shown in fig. 18, a first guide block 61 is mounted to one end of the fifth rotating shaft 60; the fifth rotating shaft 60 is installed on the end surface of the installation semicircular surface through the matching of the first guide block 61 and the first guide groove 25; a first return spring 56 is installed between the first guide block 61 and the first guide groove 25; as shown in fig. 22, a limit ring 65 is mounted at one end of the seventh gear 20; a limiting groove 68 is formed on the outer circular surface of the limiting ring 65; the seventh gear 20 is mounted on the fifth rotating shaft 60; the seventh gear 20 is meshed with the third gear 10; one end of the third rotating shaft 62 is mounted on the end surface of the mounting semicircular surface; the second gear 9 is mounted on the third rotating shaft 62; the second gear 9 is meshed with the seventh gear 20; one end of the fourth rotating shaft 63 is mounted on the end surface of the mounting semicircular surface; the first gear 7 is mounted on the fourth rotating shaft 63; the first gear 7 is meshed with the second gear 9; one end of the sixth rotating shaft 78 is mounted on the end surface of the mounting semicircular surface; the fifth gear 17 is mounted on the sixth rotating shaft 78; the fifth gear 17 meshes with the first gear 7; as shown in fig. 24, one end of the third rotating shaft 8 has a bevel gear; the other end of the third rotating shaft 8 is provided with a second guide block 73; the third rotating shaft 8 is arranged on the end surface of the installation semicircular surface through the matching of the second guide block 73 and the second guide groove 30; a third return spring 72 is installed between the second guide block 73 and the second guide groove 30; the sixth gear 19 is mounted on the third rotating shaft 8; the sixth gear 19 meshes with the fifth gear 17; an eighth support 77 is installed at one end of the third rotating shaft 8 having the bevel gear; as shown in fig. 9 and 25, one end of the connecting block 43 has a through mounting shaft hole 74; the connecting block 43 is mounted on the eighth supporting block 77; both ends of the sixth rotating shaft 18 are provided with bevel teeth; the sixth rotating shaft 18 is mounted on the connecting block 43 through the mounting shaft hole 74; the sixth rotating shaft 18 is meshed with the third rotating shaft 8 through bevel teeth; both ends of the fifth rotating shaft 16 are provided with bevel teeth; the fifth rotating shaft 16 is installed at one side of the connection block 43 through a seventh support 76; the fifth rotating shaft 16 and the sixth rotating shaft 18 are in meshing connection through bevel teeth; one end of the third support 42 is installed on the side surface of the connection block 43 where the end of the seventh support 76 is installed; a sixth support 75 is installed at the side of the other end of the third support 42; both ends of the second rotating shaft 6 are provided with bevel teeth; the second rotating shaft 6 is mounted on the sixth support 75; the second rotating shaft 6 is meshed with the fifth rotating shaft 16 through bevel teeth; one end of the first rotating shaft 2 is provided with bevel teeth; one end of the first rotating shaft 2 with the conical teeth penetrates through a shaft hole 29 on the mounting shell 4 and is positioned in the mounting shell 4; the first rotating shaft 2 is meshed with the second rotating shaft 6 through bevel teeth; the second support 40 is mounted at one end of the first rotating shaft 2 with the bevel gear; the second support 40 is connected with the third support 42 through a second connection 41; as shown in fig. 9, the cutting wheel 3 is installed at the other end of the first rotating shaft 2; as shown in fig. 5, one end of the swing shaft 55 is mounted on the end surface of the mounting semicircular surface and is close to the shaft hole 29 on the mounting case 4; as shown in fig. 19, the swing lever 37 has a pin hole at each end; the swing lever 37 is mounted on the mounting case 4 through the fitting of one of the two pin holes with the swing shaft 55; as shown in fig. 20, the end of the swing lever 37 that engages with the swing shaft 55 is located outside the mounting case 4 through the first guide groove 27 on the mounting case 4; as shown in fig. 19, a trigger block 54 is mounted on the lower circular surface of one end of the shield 1; the trigger block 54 has a ramp thereon; one end of the hood 1 having the trigger block 54 is mounted on the swing lever 37 at the end outside the mounting case 4; as shown in fig. 19, the third connecting rod 66 is mounted inside the mounting case 4 through the guide supports 46; one end of the third connecting rod 66 is connected to one end of the fifth rotating shaft 60, to which the first guide block 61 is not mounted; one end of the third connecting rod 66 is provided with the first connecting rod 38; as shown in fig. 20, the first connecting rod 38 is mounted with a pin 58; the first connecting rod 38 is connected with the swinging rod 37 through the matching of the pin 58 and another pin hole on the swinging rod 37; as shown in fig. 21, the fifth guide support 57 is mounted inside the mounting case 4; both ends of the first trigger lever 36 have slopes; the first trigger lever 36 is mounted on the fifth guide support 57; one end of the fifth trigger rod passes through the second guide groove 28 on the mounting shell 4, is positioned on the outer side of the mounting shell 4 and is matched with the inclined plane on the trigger block 54; as shown in fig. 3, the spring fixing plate 35 is mounted on the fifth triggering lever; an extension spring 34 is arranged between the spring fixing plate 35 and the end surface of the mounting shell 4 close to one side of the shield 1; as shown in fig. 21, a guiding telescopic rod 64 is installed at one side of the limiting rod 45; the limiting rod 45 is arranged in the mounting shell 4 through a guiding telescopic rod 64; one end of the limiting rod 45 is matched with a limiting groove 68 on the limiting ring 65; one side of the second trigger lever 44 has a slope; one end of the second trigger rod 44 is mounted on the limiting rod 45; the other end of the second trigger lever 44 is engaged with the inclined surface on the first trigger lever 36; as shown in fig. 8, two guide racks 33 are symmetrically installed on the inner arc surface of the trigger arc plate 5; as shown in fig. 7, the two trigger arc plates 5 are symmetrically mounted on the outer circumferential surface of the mounting shell 4 through the matching of the corresponding guide racks 33 and the corresponding first guide holes 31 on the mounting shell 4; two first compression springs 32 are respectively arranged on the two trigger arc plates 5 and the outer circular surface of the mounting shell 4; two first compression springs 32 are respectively positioned at two sides of the corresponding trigger arc plate 5; as shown in fig. 9, two seventh rotating shafts 67 are respectively installed on both side end surfaces of one end of the installation semicircular plate 24 close to the driving motor 13; the two centrifugal gears 21 are respectively arranged on the two seventh rotating shafts 22; the two centrifugal gears 21 are respectively matched with the corresponding guide racks 33; the two centrifugal gears 21 are respectively engaged with the fourth gear 11.

As shown in fig. 14, the centrifugal gear 21 includes a centrifugal wheel 50, centrifugal teeth 51, a centrifugal spring 52, and centrifugal grooves 53, wherein as shown in fig. 15, a plurality of centrifugal grooves 53 are circumferentially and uniformly formed on an outer circumferential surface of the centrifugal wheel 50 at intermediate positions; the centrifugal wheel 50 has teeth on the outer circular surface of the two ends without the centrifugal groove 53; the centrifugal wheels 50 are mounted on the corresponding seventh rotating shafts 67; as shown in fig. 16, each centrifugal groove 53 is provided with a centrifugal tooth 51; a centrifugal spring 52 is respectively arranged between each centrifugal tooth 51 and the bottom end surface of the corresponding centrifugal groove 53; as shown in fig. 12, the centrifugal teeth 51 mounted on the centrifugal wheel 50 are engaged with the fourth gear 11; as shown in fig. 13, teeth on the outer circumferential surfaces of both ends of the centrifugal wheel 50 are engaged with the guide rack 33.

As shown in fig. 23, the guiding telescopic rod 64 includes a guiding inner rod 69, a second return spring 70, and a guiding outer sleeve 71, wherein one end of the guiding outer sleeve 71 is provided with a guiding installation groove; one end of the guide outer sleeve 71 which is not provided with a guide mounting groove is arranged on the inner circular surface of the mounting shell 4; one end of the guide inner rod 69 is arranged in a guide mounting groove on the guide outer sleeve 71; a second return spring 70 is arranged between one end of the guide inner rod 69 positioned in the guide mounting groove and the bottom end of the guide mounting groove; the other end of the guide inner rod 69 is connected with the stopper rod 45.

The process that the seventh gear 20 is driven by the third gear 10; the third gear 10 will give a thrust to the teeth of the seventh gear 20 that are in contact with the third gear 10; the thrust direction is the same as the guide direction of the first guide groove 25.

The first rotating shaft 2 is connected with the first support 39 through a bearing; the second rotating shaft 6 is connected with the sixth support 75 through a bearing; the fifth rotating shaft 16 is connected with the seventh support 76 through a bearing; the sixth rotating shaft 18 is mounted in the mounting shaft hole 74 through a bearing; the third rotating shaft 8 is connected with the eighth support 77 through a bearing.

In summary, the following steps:

the tooth cutting mechanism designed by the invention can play a role in protecting the oral cavity or the gum of a patient when the patient carelessly closes the mouth through automatic adjustment.

In the invention, one end of the eighth rotating shaft 23 is provided with a bevel gear; the other end of the eighth rotating shaft 23 is installed on the rotating shaft of the driving motor 13; both ends of the fourth rotating shaft 12 are provided with bevel teeth; the fourth rotating shaft 12 is mounted inside the mounting case 4 through a first support 39; the fourth rotating shaft 12 is meshed with the eighth rotating shaft 23 through bevel gears; both ends of the seventh rotating shaft 22 are provided with bevel teeth; the seventh rotating shaft 22 is installed inside the installation case 4 through a fourth support 47; the seventh rotating shaft 22 is meshed with the fourth rotating shaft 12 through bevel gears; one end of the first rotating shaft 49 has a bevel gear; the other end of the first rotating shaft 49 is mounted on the end face of the mounting semicircular face; the first rotating shaft 49 is meshed with the seventh rotating shaft 22 through bevel gears; the fourth gear 11 is mounted on the first rotating shaft 49; one end of the second rotating shaft 59 is mounted on the end surface of the mounting semicircular surface; the third gear 10 is mounted on the second rotating shaft 59; the third gear 10 is meshed with the fourth gear 11; a first guide block 61 is installed at one end of the fifth rotating shaft 60; the fifth rotating shaft 60 is installed on the end surface of the installation semicircular surface through the matching of the first guide block 61 and the first guide groove 25; a first return spring 56 is installed between the first guide block 61 and the first guide groove 25; the seventh gear 20 is mounted on the fifth rotating shaft 60; the seventh gear 20 is meshed with the third gear 10; one end of the third rotating shaft 62 is mounted on the end surface of the mounting semicircular surface; the second gear 9 is mounted on the third rotating shaft 62; the second gear 9 is meshed with the seventh gear 20; one end of the fourth rotating shaft 63 is mounted on the end surface of the mounting semicircular surface; the first gear 7 is mounted on the fourth rotating shaft 63; the first gear 7 is meshed with the second gear 9; one end of the sixth rotating shaft 78 is mounted on the end surface of the mounting semicircular surface; the fifth gear 17 is mounted on the sixth rotating shaft 78; the fifth gear 17 meshes with the first gear 7; one end of the third rotating shaft 8 is provided with bevel teeth; the other end of the third rotating shaft 8 is provided with a second guide block 73; the third rotating shaft 8 is arranged on the end surface of the installation semicircular surface through the matching of the second guide block 73 and the second guide groove 30; a third return spring 72 is installed between the second guide block 73 and the second guide groove 30; the sixth gear 19 is mounted on the third rotating shaft 8; the sixth gear 19 meshes with the fifth gear 17; an eighth support 77 is installed at one end of the third rotating shaft 8 having the bevel gear; one end of the connecting block 43 is provided with a through mounting shaft hole 74; the connecting block 43 is mounted on the eighth supporting block 77; both ends of the sixth rotating shaft 18 are provided with bevel teeth; the sixth rotating shaft 18 is mounted on the connecting block 43 through the mounting shaft hole 74; the sixth rotating shaft 18 is meshed with the third rotating shaft 8 through bevel teeth; both ends of the fifth rotating shaft 16 are provided with bevel teeth; the fifth rotating shaft 16 is installed at one side of the connection block 43 through a seventh support 76; the fifth rotating shaft 16 and the sixth rotating shaft 18 are in meshing connection through bevel teeth; one end of the third support 42 is installed on the side surface of the connection block 43 where the end of the seventh support 76 is installed; a sixth support 75 is installed at the side of the other end of the third support 42; both ends of the second rotating shaft 6 are provided with bevel teeth; the second rotating shaft 6 is mounted on the sixth support 75; the second rotating shaft 6 is meshed with the fifth rotating shaft 16 through bevel teeth; one end of the first rotating shaft 2 is provided with bevel teeth; one end of the first rotating shaft 2 with the conical teeth penetrates through a shaft hole 29 on the mounting shell 4 and is positioned in the mounting shell 4; the first rotating shaft 2 is meshed with the second rotating shaft 6 through bevel teeth; the second support 40 is mounted at one end of the first rotating shaft 2 with the bevel gear; the second support 40 is connected with the third support 42 through a second connection 41; the cutting wheel 3 is arranged at the other end of the first rotating shaft 2; the first rotating shaft 2 is connected with the first support 39 through a bearing; the second rotating shaft 6 is connected with the sixth support 75 through a bearing; the fifth rotating shaft 16 is connected with the seventh support 76 through a bearing; the sixth rotating shaft 18 is mounted in the mounting shaft hole 74 through a bearing; the third rotating shaft 8 is connected with the eighth support 77 through a bearing. When the driving motor 13 drives the eighth rotating shaft 23 to rotate and the seventh gear 20 is locked, the eighth rotating shaft 23 rotates to drive the fourth rotating shaft 12 to rotate; the fourth rotating shaft 12 rotates to drive the seventh rotating shaft 22 to rotate; the seventh rotating shaft 22 rotates to drive the first rotating shaft 49 to rotate; the first rotating shaft 49 rotates to drive the fourth gear 11 to rotate; the fourth gear 11 rotates to drive the third gear 10 to rotate; the third gear 10 rotates to drive the seventh gear 20 to rotate; the seventh gear 20 rotates to drive the second gear 9 to rotate; the second gear 9 rotates to drive the first gear 7 to rotate; the first gear 7 rotates to drive the fifth gear 17 to rotate; the fifth gear 17 rotates to drive the sixth gear 19 to rotate; the sixth gear 19 rotates to drive the third rotating shaft 8 to rotate; the third rotating shaft 8 rotates to drive the sixth rotating shaft 18 to rotate; the sixth rotating shaft 18 rotates to drive the fifth rotating shaft 16 to rotate; the fifth rotating shaft 16 rotates the second rotating shaft 6; the second rotating shaft 6 rotates to drive the first rotating shaft 2 to rotate; the first rotating shaft 2 rotates to drive the cutting wheel 3 to rotate; i.e. the cutting wheel 3 is working. When the cutting wheel 3 is in operation, if the user carelessly presses the tongue against the cutting wheel 3, the cutting wheel 3 is pushed towards the side of the mounting shell 4; i.e. the cutting wheel 3 will move; the cutting wheel 3 moves to drive the first rotating shaft 2 to move; the first rotating shaft 2 moves to drive the second support 40 to move; the second support 40 drives the second connection 41 to move; the second connection 41 moves to drive the third support 42 to move; the third support 42 moves to drive the connecting block 43 to move; the connection block 43 moves to drive the seventh support 76 to move; meanwhile, the third support 42 moves to drive the sixth support 75 to move; the sixth support 75 moves to drive the second rotating shaft 6 to move; the seventh support 76 moves to drive the fifth rotating shaft 16 to move; the connection block 43 moves to drive the sixth rotating shaft 18 to move; meanwhile, the connecting block 43 moves to drive the eighth support 77 to move; the eighth support 77 moves to drive the third rotating shaft 8 to move towards the second guide groove 30; the third rotating shaft 8 moves to drive the sixth gear 19 to move; the sixth gear 19 moves to disengage the fifth gear 17; that is, the fifth gear 17 does not drive the sixth gear 19 to rotate; namely, the cutting wheel 3 stops rotating; the lower oral cavity is prevented from being cut when the user carelessly pushes the tongue against the cutting wheel 3; when the use is completed, the third rotating shaft 8 is restored to the original position by the third return spring 72.

One end of a swing shaft 55 is arranged on the end surface of the installation semicircular surface and is close to a shaft hole 29 on the installation shell 4; two ends of the swinging rod 37 are respectively provided with a pin hole; the swing lever 37 is mounted on the mounting case 4 through the fitting of one of the two pin holes with the swing shaft 55; one end of the swinging rod 37 matched with the swinging shaft 55 passes through the first guide groove 27 on the mounting shell 4 and is positioned outside the mounting shell 4; a trigger block 54 is arranged on the lower circular surface at one end of the shield 1; the trigger block 54 has a ramp thereon; one end of the hood 1 having the trigger block 54 is mounted on the swing lever 37 at the end outside the mounting case 4; the third connecting rod 66 is installed inside the installation case 4 through the guide support 46; one end of the third connecting rod 66 is connected to one end of the fifth rotating shaft 60, to which the first guide block 61 is not mounted; one end of the third connecting rod 66 is provided with the first connecting rod 38; the first connecting rod 38 is provided with a pin 58; the first connecting rod 38 is connected with the swinging rod 37 through the matching of the pin 58 and another pin hole on the swinging rod 37; the fifth guide support 57 is installed inside the installation case 4; both ends of the first trigger lever 36 have slopes; the first trigger lever 36 is mounted on the fifth guide support 57; one end of the fifth trigger rod passes through the second guide groove 28 on the mounting shell 4, is positioned on the outer side of the mounting shell 4 and is matched with the inclined plane on the trigger block 54; the spring fixing plate 35 is installed on the fifth trigger lever; an extension spring 34 is arranged between the spring fixing plate 35 and the end surface of the mounting shell 4 close to one side of the shield 1; one side of the limiting rod 45 is provided with a guiding telescopic rod 64; the limiting rod 45 is arranged in the mounting shell 4 through a guiding telescopic rod 64; one end of the limiting rod 45 is matched with a limiting groove 68 on the limiting ring 65; one side of the second trigger lever 44 has a slope; one end of the second trigger rod 44 is mounted on the limiting rod 45; the other end of the second trigger lever 44 is engaged with the inclined surface on the first trigger lever 36; the guiding telescopic rod 64 comprises a guiding inner rod 69, a second return spring 70 and a guiding outer sleeve 71, wherein one end of the guiding outer sleeve 71 is provided with a guiding installation groove; one end of the guide outer sleeve 71 which is not provided with a guide mounting groove is arranged on the inner circular surface of the mounting shell 4; one end of the guide inner rod 69 is arranged in a guide mounting groove on the guide outer sleeve 71; a second return spring 70 is arranged between one end of the guide inner rod 69 positioned in the guide mounting groove and the bottom end of the guide mounting groove; the other end of the guide inner rod 69 is connected with the limiting rod 45; the process that the seventh gear 20 is driven by the third gear 10; the third gear 10 will give a thrust to the teeth of the seventh gear 20 that are in contact with the third gear 10; the thrust direction is the same as the guide direction of the first guide groove 25. When the cutting wheel 3 is in operation, the upper mouth of the user will contact the shield 1 if the user inadvertently closes his mouth; causing the shield 1 to swing downwards; the swinging of the shield 1 on the one hand presses the first trigger lever 36 through the trigger block 54 to make the first trigger lever 36 move toward the side far away from the shield 1; movement of the first trigger lever 36 will cause the tension spring 34 to be forced; at the same time, the first trigger rod 36 will press the second trigger rod 44 to move towards the side far away from the seventh gear 20; the second trigger rod 44 moves to drive the limiting rod 45 to move; the guide inner rod 69 is compressed when the limiting rod 45 moves; so that the guide inner rod 69 compresses the second return spring 70; the swinging of the shield 1 drives the swinging rod 37 to swing; the swinging lever 37 swings so that the first connecting rod 38 moves toward the side away from the seventh gear 20; the first connecting rod 38 moves to drive the third connecting rod 66 to move; when the limiting rod 45 is completely separated from the limiting groove 68 on the limiting ring 65 in the moving process of the limiting rod 45, the third connecting rod 66 moves to drive the fifth rotating shaft 60 to move towards the first guide groove 25; the fifth rotating shaft 60 moves to drive the seventh gear 20 to move; meanwhile, the third gear 10 can give thrust to teeth on the seventh gear 20, which are in contact with the third gear 10; the thrust direction is the same as the guide direction of the first guide groove 25; the seventh gear 20 is now disengaged from the third gear 10; namely, the third gear 10 does not drive the seventh gear 20 to rotate; namely, the cutting wheel 3 stops rotating; the lower oral cavity is prevented from being cut; when the use is finished, the first trigger rod 36 is restored to the original position under the action of the extension spring 34; the seventh gear 20 is biased to the original position by the first return spring 56; the stopper rod 45 is restored to the original position by the second return spring 70.

Two guide racks 33 are symmetrically arranged on the inner arc surface of the trigger arc plate 5; the two trigger arc plates 5 are symmetrically arranged on the outer circular surface of the mounting shell 4 through the matching of the corresponding guide racks 33 and the corresponding first guide holes 31 on the mounting shell 4; two first compression springs 32 are respectively arranged on the two trigger arc plates 5 and the outer circular surface of the mounting shell 4; two first compression springs 32 are respectively positioned at two sides of the corresponding trigger arc plate 5; the two seventh rotating shafts 67 are respectively arranged on the end surfaces of the two sides of one end of the installation semicircular plate 24 close to the driving motor 13; the two centrifugal gears 21 are respectively arranged on the two seventh rotating shafts 22; the two centrifugal gears 21 are respectively matched with the corresponding guide racks 33; the two centrifugal gears 21 are respectively matched with the fourth gear 11; when the cutting wheel 3 works, if a user sneezes or closes the mouth accidentally, the upper oral cavity and the lower oral cavity of the user can squeeze the hands of medical staff, the hands of the medical staff press the two trigger arc plates 5 at the moment, and the hands of the medical staff press the two trigger arc plates 5 under normal conditions, so that the trigger arc plates 5 cannot be triggered; but when the trigger arc plate 5 is subjected to an external force; the trigger arc plate 5 moves toward the center of the mounting case 4; when the upper and lower oral cavities of the user press the hands of the medical staff, the trigger arc plate 5 moves toward the center of the mounting case 4; the trigger arc plate 5 moves to drive the corresponding guide rack 33 to move; the movement of the guide rack 33 causes the rotation of the centrifugal gear 21; the rotation of the centrifugal gear 21 causes the centrifugal teeth 51 mounted thereon to move to the outside of the centrifugal wheel 50 under the centrifugal action; in the moving process of the centrifugal teeth 51, when the centrifugal teeth 51 contact with the teeth on the fourth gear 11, and the trigger arc plate 5 is in a static state, that is, the guide teeth are in a static state, at this time, the centrifugal teeth 51 will block the fourth gear 11; i.e. the fourth gear wheel 11 does not rotate; i.e. the cutting wheel 3 does not rotate; i.e. to prevent the user from inadvertently sneezing or cutting the lower oral cavity when closing the nozzle.

The specific implementation mode is as follows: when people use the tooth cutting mechanism designed by the invention, when the driving motor 13 drives the eighth rotating shaft 23 to rotate and the seventh gear 20 is blocked, the eighth rotating shaft 23 rotates to drive the fourth rotating shaft 12 to rotate; the fourth rotating shaft 12 rotates to drive the seventh rotating shaft 22 to rotate; the seventh rotating shaft 22 rotates to drive the first rotating shaft 49 to rotate; the first rotating shaft 49 rotates to drive the fourth gear 11 to rotate; the fourth gear 11 rotates to drive the third gear 10 to rotate; the third gear 10 rotates to drive the seventh gear 20 to rotate; the seventh gear 20 rotates to drive the second gear 9 to rotate; the second gear 9 rotates to drive the first gear 7 to rotate; the first gear 7 rotates to drive the fifth gear 17 to rotate; the fifth gear 17 rotates to drive the sixth gear 19 to rotate; the sixth gear 19 rotates to drive the third rotating shaft 8 to rotate; the third rotating shaft 8 rotates to drive the sixth rotating shaft 18 to rotate; the sixth rotating shaft 18 rotates to drive the fifth rotating shaft 16 to rotate; the fifth rotating shaft 16 rotates the second rotating shaft 6; the second rotating shaft 6 rotates to drive the first rotating shaft 2 to rotate; the first rotating shaft 2 rotates to drive the cutting wheel 3 to rotate; i.e. the cutting wheel 3 is working.

Claims

1. The utility model provides a tooth cutting mechanism of area protection which characterized in that: the device comprises a shield, a first rotating shaft, a cutting wheel, an installation shell, a trigger arc plate, a second rotating shaft, a first gear, a guide square hole, a third rotating shaft, a second gear, a third gear, a fourth rotating shaft, a driving motor, a battery, an electric wire, a fifth rotating shaft, a fifth gear, a sixth rotating shaft, a sixth gear, a seventh gear, a centrifugal gear, a seventh rotating shaft, an eighth rotating shaft, an installation semicircular plate, a first guide groove, a charging port, a first guide groove, a second guide groove, a shaft hole, a second guide groove, a first guide hole, a first compression spring, a guide rack, an extension spring, a spring fixing plate, a first trigger rod, a swinging rod, a first connecting rod, a first support, a second connection, a third support, a connection square block, a second trigger rod, a limiting rod, a guide support, a fourth support, a charging head, a first rotating shaft, a trigger block, a swinging shaft, a guide square hole, a guide square hole, The device comprises a first reset spring, a fifth guide support, a pin, a second rotating shaft, a fifth rotating shaft, a first guide block, a third rotating shaft, a third connecting rod, a guide telescopic rod, a limiting ring, a limiting groove, a third reset spring, a second guide block, a mounting shaft hole, a sixth support, a seventh support, an eighth support and a seventh rotating shaft, wherein one end of a mounting shell is provided with a charging port which is communicated with the inner side of the mounting shell; the other end of the mounting shell is provided with a shaft hole which is communicated with the inner side of the mounting shell; one end of the mounting shell, which is provided with the shaft hole, is provided with a first guide groove and a second guide groove which are communicated with the inner side of the mounting shell; four guide square holes are formed in the outer circular surface of the mounting shell; every two of the four guiding square holes are uniformly distributed on the outer circular surface of the mounting shell in a group in the circumferential direction, and the two guiding square holes in the same group are mutually symmetrical; the semicircular surface of the mounting semicircular plate is arranged on the inner circular surface of the mounting shell and is positioned at one end, close to the shaft hole, in the mounting shell; a first guide hole is formed in the end face of the mounting semicircular surface in the transverse direction; a first guide groove is formed in the end face of the mounting semicircular surface in the longitudinal direction;

one end of the battery is provided with two symmetrical charging heads; the battery is arranged at one end close to the charging port in the mounting shell; a charging head on the battery is matched with the charging port; the driving motor is arranged on the inner side of the mounting shell and is close to the battery; an electric wire is connected between the driving motor and the battery; one end of the eighth rotating shaft is provided with bevel teeth; the other end of the eighth rotating shaft is arranged on the rotating shaft of the driving motor; both ends of the fourth rotating shaft are provided with bevel teeth; the fourth rotating shaft is arranged on the inner side of the mounting shell through the first support; the fourth rotating shaft is meshed with the eighth rotating shaft through bevel teeth; both ends of the seventh rotating shaft are provided with bevel teeth; the seventh rotating shaft is arranged on the inner side of the mounting shell through a fourth support; the seventh rotating shaft is meshed with the fourth rotating shaft through bevel teeth; one end of the first rotating shaft is provided with bevel teeth; the other end of the first rotating shaft is arranged on the end surface of the mounting semicircular surface; the first rotating shaft and the seventh rotating shaft are in meshing connection through bevel teeth; the fourth gear is arranged on the first rotating shaft; one end of the second rotating shaft is arranged on the end face of the mounting semicircular face; the third gear is arranged on the second rotating shaft; the third gear is meshed with the fourth gear; one end of the fifth rotating shaft is provided with a first guide block; the fifth rotating shaft is arranged on the end face of the installation semicircular surface through the matching of the first guide block and the first guide groove; a first return spring is arranged between the first guide block and the first guide groove; one end of the seventh gear is provided with a limit ring; the outer circular surface of the limiting ring is provided with a limiting groove; the seventh gear is arranged on the fifth rotating shaft; the seventh gear is meshed with the third gear; one end of the third rotating shaft is arranged on the end surface of the mounting semicircular surface; the second gear is arranged on the third rotating shaft; the second gear is meshed with the seventh gear; one end of the fourth rotating shaft is arranged on the end surface of the mounting semicircular surface; the first gear is arranged on the fourth rotating shaft; the first gear is meshed with the second gear; one end of the sixth rotating shaft is arranged on the end surface of the mounting semicircular surface; the fifth gear is arranged on the sixth rotating shaft; the fifth gear is meshed with the first gear; one end of the third rotating shaft is provided with bevel teeth; the other end of the third rotating shaft is provided with a second guide block; the third rotating shaft is arranged on the end face of the installation semicircular surface through the matching of the second guide block and the second guide groove; a third return spring is arranged between the second guide block and the second guide groove; the sixth gear is arranged on the third rotating shaft; the sixth gear is meshed with the fifth gear; the eighth support is arranged at one end of the third rotating shaft, which is provided with bevel teeth; one end of the connecting block is provided with a through mounting shaft hole; the connecting block is arranged on the eighth supporting block; both ends of the sixth rotating shaft are provided with bevel teeth; the sixth rotating shaft is arranged on the connecting square block through the mounting shaft hole; the sixth rotating shaft is meshed with the third rotating shaft through bevel teeth; both ends of the fifth rotating shaft are provided with bevel teeth; the fifth rotating shaft is arranged on one side of the connecting block through a seventh support; the fifth rotating shaft is meshed with the sixth rotating shaft through bevel teeth; one end of the third support is arranged on the side surface of the connecting block, which is provided with one end of the seventh support; the sixth support is arranged on the side surface of the other end of the third support; both ends of the second rotating shaft are provided with bevel teeth; the second rotating shaft is arranged on the sixth support; the second rotating shaft is meshed with the fifth rotating shaft through bevel teeth; one end of the first rotating shaft is provided with bevel teeth; one end of the first rotating shaft with the bevel gear penetrates through a shaft hole in the mounting shell and is positioned in the mounting shell; the first rotating shaft and the second rotating shaft are meshed and connected through bevel teeth; the second support is arranged at one end of the first rotating shaft, which is provided with bevel teeth; the second support is connected with the third support through a second connection;

the cutting wheel is arranged at the other end of the first rotating shaft; one end of the swinging shaft is arranged on the end surface of the mounting semicircular surface and is close to the shaft hole on the mounting shell; two pin holes are respectively formed at two ends of the swinging rod; the swinging rod is arranged on the mounting shell through the matching of one of the two pin holes and the swinging shaft; one end of the swinging rod matched with the swinging shaft penetrates through the first guide groove on the mounting shell and is positioned outside the mounting shell; a trigger block is arranged on the lower circular surface at one end of the protective cover; the trigger block is provided with an inclined plane; one end of the protective cover, which is provided with the trigger block, is arranged at one end of the swinging rod, which is positioned at the outer side of the mounting shell; the third connecting rod is arranged on the inner side of the mounting shell through a guide support; one end of the third connecting rod is connected with one end of the fifth rotating shaft, which is not provided with the first guide block; one end of the third connecting rod is provided with a first connecting rod; a pin is arranged on the first connecting rod; the first connecting rod is connected with the swinging rod through the matching of the pin and another pin hole on the swinging rod; the fifth guide support is arranged on the inner side of the mounting shell; both ends of the first trigger rod are provided with inclined planes; the first trigger rod is arranged on the fifth guide support; one end of a fifth trigger rod penetrates through a second guide groove in the mounting shell, is positioned on the outer side of the mounting shell and is matched with the inclined plane on the trigger block; the spring fixing plate is arranged on the fifth trigger rod; an extension spring is arranged between the spring fixing plate and the end face of one side, close to the protective cover, in the mounting shell; one side of the limiting rod is provided with a guiding telescopic rod; the limiting rod is arranged in the mounting shell through the guiding telescopic rod; one end of the limiting rod is matched with the limiting groove on the limiting ring; one side of the second trigger rod is provided with an inclined plane; one end of the second trigger rod is arranged on the limiting rod; the other end of the second trigger rod is matched with the inclined plane on the first trigger rod; two guide racks are symmetrically arranged on the inner arc surface of the trigger arc plate; the two trigger arc plates are symmetrically arranged on the outer circular surface of the mounting shell through the matching of the corresponding guide racks and the corresponding first guide holes on the mounting shell; two first compression springs are respectively arranged on the two trigger arc plates and the outer circular surface of the mounting shell; the two first compression springs are respectively positioned at two sides of the corresponding trigger arc plate; the two seventh rotating shafts are respectively arranged on the end surfaces of the two sides of one end, close to the driving motor, of the installation semicircular plate; the two centrifugal gears are respectively arranged on the two seventh rotating shafts; the two centrifugal gears are respectively matched with the corresponding guide racks; the two centrifugal gears are respectively matched with the fourth gear.

2. A protected dental cutting mechanism according to claim 1, further comprising: the centrifugal gear comprises a centrifugal wheel, centrifugal teeth, a centrifugal spring and centrifugal grooves, wherein a plurality of centrifugal grooves are uniformly formed in the middle of the outer circular surface of the centrifugal wheel in the circumferential direction; teeth are arranged on the outer circular surface of the centrifugal wheel which is not provided with the two ends of the centrifugal groove; the centrifugal wheels are arranged on the corresponding seventh rotating shafts; each centrifugal groove is internally provided with a centrifugal tooth; a centrifugal spring is respectively arranged between each centrifugal tooth and the bottom end face of the corresponding centrifugal groove; the centrifugal teeth arranged on the centrifugal wheel are matched with the fourth gear; teeth on the outer circular surfaces of two ends of the centrifugal wheel are meshed with the guide rack.

3. A protected dental cutting mechanism according to claim 1, further comprising: the guide telescopic rod comprises a guide inner rod, a second reset spring and a guide outer sleeve, wherein one end of the guide outer sleeve is provided with a guide mounting groove; one end of the guide outer sleeve, which is not provided with the guide mounting groove, is arranged on the inner circular surface of the mounting shell; one end of the guide inner rod is arranged in a guide mounting groove on the guide outer sleeve; a second return spring is arranged between one end of the guide inner rod positioned in the guide mounting groove and the bottom end of the guide mounting groove; the other end of the guide inner rod is connected with the limiting rod.

4. A protected dental cutting mechanism according to claim 1, further comprising: the third gear drives the seventh gear to rotate; the third gear can provide thrust for teeth on the seventh gear, which are in contact with the third gear; the thrust direction is the same as the guide direction of the first guide groove.

5. A protected dental cutting mechanism according to claim 1, further comprising: the first rotating shaft is connected with the first support through a bearing; the second rotating shaft is connected with the sixth support through a bearing; the fifth rotating shaft is connected with the seventh support through a bearing; the sixth rotating shaft is arranged in the mounting shaft hole through a bearing; the third rotating shaft is connected with the eighth support through a bearing.