High-speed turbine dental handpiece with pressure-stabilizing guide air pipe at air inlet hole

Abstract

The utility model relates to the technical field of dental medical instruments, in particular to a high-speed turbine dental handpiece with a pressure-stabilizing guide air pipe at an air inlet, which comprises a handpiece head and a handle, a rotating shaft is pivoted in the handpiece head, a worm gear is fixedly connected onto the rotating shaft, the worm gear is positioned in an accommodating cavity in the handpiece head, the air inlet is further arranged on the handpiece head, and an air guide pipe is mounted in the air inlet. The front end of the air guide pipe is communicated with the containing cavity and faces the worm gear so as to drive the worm gear to drive the rotating shaft to rotate, the rear end of the air guide pipe protrudes out of the rear end of the machine head and extends towards the handle, the rear end of the machine head is connected with the handle, a working air pipe is arranged in the handle, and the front end of the working air pipe is connected with the air guide pipe; the independent air guide pipe is installed in the machine head, so that the length of the air guide pipe does not need to be limited by the size of the machine head, ideal guide length can be achieved, compressed air can be better collected and guided in the working process, the driving effect of the compressed air on the worm wheel can be remarkably improved, and the working efficiency is improved. And the working performance of the high-speed dental handpiece is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to dental medical instrument technical field, concretely is a kind of high-speed turbine dental handpiece with air inlet hole and pressure-stabilizing guiding air pipe. BACKGROUND

[0002] Dental handpiece (i.e. dental hand-held bending machine) is a kind of commonly used medical instrument in stomatology department, and is used to drill, cut, polish and polish the tooth of patient. Dental handpiece is usually divided into high-speed dental handpiece and low-speed dental handpiece, wherein the head of high-speed dental handpiece is pivotally connected with a rotating shaft with worm gear, and the rotating shaft and the drill bit are rotated by driving worm gear through compressed air in working, so the rotating speed is high. The existing high-speed dental handpiece generally sets air inlet hole on the head shell, and compressed air enters the head interior to drive worm gear, so the length of air inlet hole is limited by the size of head, and ideal guiding length is difficult to realize, so air inlet hole is difficult to produce better converging guiding effect on compressed air, which will affect the driving effect of compressed air on worm gear, and further affect the working performance of high-speed dental handpiece. SUMMARY

[0003] In order to overcome the above-mentioned deficiencies of prior art, the task of the utility model is to provide a high-speed turbine dental handpiece with air inlet hole and pressure-stabilizing guiding air pipe.

[0004] The task of the utility model is realized by the following technical scheme:

[0005] A high-speed turbine dental handpiece with air inlet hole and pressure-stabilizing guiding air pipe, comprising a head and a handle, a rotating shaft is pivotally connected in the head, a worm gear is fixedly connected on the rotating shaft, the worm gear is located in the accommodating cavity in the head, an air inlet hole is further provided on the head, a wind guide pipe is installed in the air inlet hole, the front end of the wind guide pipe is communicated with the accommodating cavity and faces the worm gear so as to drive the worm gear to drive the rotating shaft to rotate, the rear end of the wind guide pipe protrudes out of the rear end of the head and extends towards the handle, the rear end of the head is connected with the handle, a working air pipe is provided in the handle, and the front end of the working air pipe is connected with the wind guide pipe.

[0006] As a preferred technical scheme, the inner hole of the wind guide pipe is a multi-section straight-through structure with gradually decreasing inner diameter from rear end to front end.

[0007] As a preferred technical scheme, the front end of the wind guide pipe protrudes out of the inner wall of the head and extends towards the worm gear, and the wind guide pipe is detachably connected with the air inlet hole and can adjust the protruding length of the front end of the wind guide pipe.

[0008] As a preferred technical scheme, the machine head comprises a machine head shell, a top cover, and a barrel, the barrel is fixed in the machine head shell, the rotating shaft is pivotally connected in the barrel through two upper and lower bearings, sealing rings are respectively arranged between the barrel and the two bearings, the rotating shaft is provided with a shaft hole in the center and is provided with a needle through the shaft hole, the barrel is provided with the accommodating cavity, the side of the barrel is provided with a window communicating with the accommodating cavity, the air inlet hole is arranged on the machine head shell, and the front end of the air duct protrudes from the inner wall of the machine head shell and communicates with the accommodating cavity through the window of the barrel.

[0009] As a preferred technical scheme, the machine head further comprises a button cover and a first spring, the button cover is slidingly arranged above the top cover and is elastically connected with the top cover through the spring, the rotating shaft is a pressing shaft, the upper end of the rotating shaft protrudes out of the top cover, and the middle of the button cover is provided with a boss protruding towards the rotating shaft.

[0010] As a preferred technical scheme, the rear end of the handle is provided with an air inlet pipe, the air inlet pipe and the working air pipe are connected through a pressure stabilizer, the pressure stabilizer comprises a pressure stabilizer shell, a second spring, a pressure stabilizer sliding block and a pressure stabilizer core pipe, the two ends of the pressure stabilizer core pipe are respectively communicated with the air inlet pipe and the working air pipe, a pressure stabilizer sealing sleeve is arranged on the outer side of the pressure stabilizer core pipe, and an annular cavity is formed between the pressure stabilizer core pipe and the pressure stabilizer sealing sleeve, the pressure stabilizer sliding block is located in the annular cavity and slidingly arranged on the outer side of the pressure stabilizer core pipe and is elastically connected with the pressure stabilizer shell through the second spring, the pressure stabilizer core pipe and the pressure stabilizer shell are respectively provided with a first through hole and a second through hole which are axially offset, when the airflow pressure in the pressure stabilizer core pipe does not exceed a set threshold value, the pressure stabilizer sliding block can block the second through hole under the action of the second spring, when the airflow pressure in the pressure stabilizer core pipe exceeds the set threshold value, the airflow can push the pressure stabilizer sliding block to overcome the elastic force of the second spring to unblock the second through hole after passing through the first through hole, so that the first through hole and the second through hole are communicated to release the pressure.

[0011] As a preferred technical scheme, the front end of the pressure stabilizer is sealingly connected with the working air pipe through the pressure stabilizer shell, and a sealing ring is arranged between the pressure stabilizer shell and the working air pipe, and the rear end of the pressure stabilizer is sealingly connected with the air inlet pipe through the pressure stabilizer core pipe, and a sealing ring is arranged between the pressure stabilizer core pipe and the air inlet pipe.

[0012] As a preferred technical scheme, the handle is further provided with a water pipe for supplying water to the water spraying hole of the machine head, a water filter for filtering impurities is arranged at the inlet of the water pipe, the water filter is sealingly connected with the water pipe through a sealing ring, and a check valve for preventing backward flow is further arranged on the water pipe, the check valve comprises a check valve core, a check valve body and a check valve shell, the check valve shell is fixedly connected to the front end of the check valve core and an annular cavity is arranged between the check valve core and the check valve shell, the check valve body is located in the annular cavity and is connected to the front end of the check valve core, and the outlet of the check valve body is a tapered structure gradually narrowing towards the front end.

[0013] As a preferred technical scheme, the working air pipe is further bypassed with an atomizing pipe, the atomizing pipe is communicated to the handpiece and is used for atomizing water of the water injection hole.

[0014] As a preferred technical scheme, the rear end of the handle is provided with a handle joint, the handle joint comprises a fixedly connected joint shell, a joint core and a sealing piece, the joint shell is fixedly connected with the handle, the water pipe and the air inlet pipe are fixedly connected on the joint core and are sealed through the sealing piece, and the joint shell is further provided with sound insulation cotton between the handle, and the sound insulation cotton is wrapped at the air outlet hole arranged on the handle.

[0015] The utility model discloses a high -speed turbine dental handpiece with air inlet hole area pressure -stabilizing guide air pipe has the following

[0016] Beneficial effects:

[0017] 1. By installing independent air guide pipe in the handpiece, the length of the air guide pipe is not limited by the size of the handpiece, the ideal guide length can be realized, the compressed air can be better bunched and guided during work, the driving effect of the compressed air on the worm gear can be significantly improved, and the working performance of the high-speed dental handpiece is improved.

[0018] 2. In the prior art, it is difficult to directly process the air inlet hole on the handpiece into a multi-section structure with straight-through and gradually decreasing inner diameter, and the processing difficulty is large. In the present application, the air guide pipe can be pre-processed, so that it is convenient to process it into a multi-section straight-through pipe with straight-through and gradually decreasing inner diameter. During work, the compressed air can be better bunched and compressed step by step, and then guided through the guide pipe, so that the driving effect of the compressed air on the worm gear can be further improved, and the working performance of the high-speed dental handpiece is further improved.

[0019] 3. In the prior art, in order to avoid interference of the worm gear rotation, a relatively wide gap is reserved between the worm gear and the inner wall of the handpiece, that is, there is a large gap between the outlet of the air inlet hole and the worm gear, which causes the compressed air to be easily dispersed after being sprayed out of the outlet of the air inlet hole during work, thereby affecting the driving force on the worm gear. In the present application, the front end of the air guide pipe protrudes out of the inner wall of the handpiece, which can reduce the gap between the front end of the air guide pipe and the worm gear, thereby reducing the dispersion of the compressed air during work, and improving the driving effect of the compressed air on the worm gear.

[0020] 4. By setting the pressure stabilizer, when the supply pressure of the compressed air exceeds the set threshold value, the pressure stabilizer can automatically drive the pressure stabilizing slider to move to make the first through hole and the second through hole communicate to release pressure and realize pressure stabilization, so that the air pressure of the compressed air used to drive the worm gear is more stable.

[0021] 5. By setting the check valve, the backflow of the water supply in the water pipe can be avoided.

[0022] The utility model discloses a high-speed turbine dental handpiece with the air inlet hole and the pressure stabilizing guide air pipe, and the air inlet hole is provided with the pressure stabilizing guide air pipe. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the external structure schematic diagram of high-speed turbine dental handpiece with the air inlet hole and the pressure stabilizing guide air pipe in example;

[0024] Figure 2 It is the longitudinal section structure schematic diagram of Figure 1 .

[0025] Figure 3 It is the assembly structure schematic diagram of handpiece shell and air guide pipe;

[0026] Figure 4 It is the section structure schematic diagram of Figure 3 .

[0027] Among them: handpiece 1, pivot 11, worm wheel 12, air guide pipe 13, handpiece shell 14, top cap 15, cylinder 16, bearing 17, button cover 18, first spring 19, handle 2, working air pipe 21, air inlet pipe 22, voltage stabilizer 23, voltage stabilizer shell 231, second spring 232, voltage stabilizer sliding block 233, voltage stabilizer core pipe 234, sealing ring 24, water pipe 25, water filter 251, check valve 26, check valve core 261, check valve body 262, check valve shell 263, atomizing pipe 27, handle joint 28, joint shell 281, joint core piece 282, sealing piece 283, sound-absorbing cotton 284, drill 3. DETAILED DESCRIPTION

[0028] In order to make the utility model's purpose, technical scheme and advantage more clearly, following combining with the drawing and example, this utility model carries out further detailed explanation. Should understand, the specific example described here is only for explaining the utility model, and is not for limiting the utility model.

[0029] It should be noted that in the present application, the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, mainly for better description of the present application and its embodiments, and are not used to limit the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation. In addition, the terms "mounting", "setting", "provided with", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] As shown in Figures 1-4 A high-speed turbine dental handpiece with air inlet hole and pressure-stabilized guide air pipe, comprising a handpiece 1 and a handle 2, a rotating shaft 11 is pivotally connected in the handpiece 1, a worm gear 12 is fixedly connected on the rotating shaft 11, the worm gear 12 is located in a containing cavity in the handpiece 1, the handpiece 1 is also provided with an air inlet hole, a prefabricated hard air guide pipe 13 is installed in the air inlet hole, the air guide pipe 13 is preferably made of metal material, the front end of the air guide pipe 13 communicates with the containing cavity and faces the worm gear 12 to facilitate driving the worm gear 12 to rotate the rotating shaft 11, the rear end of the air guide pipe 13 protrudes from the rear end of the handpiece 1 and extends towards the handle 2, the rear end of the handpiece 1 is connected with the handle 2, a working air pipe 21 for supplying compressed air is arranged in the handle 2, and the front end of the working air pipe 21 is connected with the air guide pipe 13.

[0031] The high-speed turbine dental handpiece with air inlet hole and pressure-stabilized guide air pipe provided in the embodiment, by installing an independent air guide pipe 13 in the handpiece 1, therefore the length of the air guide pipe 13 is not limited by the size of the handpiece 1, the ideal guide length can be achieved, the compressed air can be better bunched and guided during work, and the guide length is longer, therefore the driving effect of the compressed air on the worm gear 12 can be significantly improved, and the working performance of the high-speed dental handpiece is improved.

[0032] As one of the preferred schemes, the inner hole of the air guide pipe 13 is a multi-section straight-through structure with gradually decreasing inner diameters from the rear end to the front end. In this embodiment, the inner diameters of the rear section, the middle section and the front section of the air guide pipe are 2.2 mm, 1.8 mm and 1.2 mm respectively. In this application, since the air guide pipe 13 can be pre-processed and formed, it is convenient to process it into a multi-section straight-through pipe with gradually decreasing inner diameters. During operation, the compressed air can be gradually compressed and condensed, and then guided by the guide pipe, thereby further improving the driving effect of the compressed air on the worm gear 12, and further improving the working performance of the high-speed dental handpiece. In the prior art, it is difficult to directly process the air inlet hole on the handpiece 1 into a multi-section structure with gradually decreasing inner diameters, and the processing difficulty is relatively large.

[0033] As one of the preferred schemes, the front end of the air guide pipe 13 protrudes from the inner wall of the handpiece 1 and extends towards the worm gear 12. The air guide pipe 13 is detachably connected with the air inlet hole and can adjust the protruding length of the front end of the air guide pipe 13. In the prior art, in order to avoid interference with the rotation of the worm gear 12, a relatively wide gap is required between the worm gear 12 and the inner wall of the handpiece 1, i.e. there is a large gap between the outlet of the air inlet hole and the worm gear 12, which causes the compressed air to easily escape from the outlet of the air inlet hole during operation, thereby affecting the driving force on the worm gear 12. In this application, by setting the front end of the air guide pipe 13 to protrude from the inner wall of the handpiece 1, the gap between the front end of the air guide pipe 13 and the worm gear 12 can be reduced, thereby reducing the escape of compressed air during operation, and further improving the driving effect of the compressed air on the worm gear 12. Moreover, the protruding length of the front end of the air guide pipe 13 can be adjusted, so that the gap between the front end of the air guide pipe 13 and the worm gear 12 can be minimized without interfering with the rotation of the worm gear 12.

[0034] As one of the preferred schemes, the handpiece 1 includes a handpiece shell 14, a top cover 15 and a barrel 16. The barrel 16 is fixed in the handpiece shell 14. The rotating shaft 11 is pivotally connected in the barrel 16 through two upper and lower bearings 17. The barrel 16 and the two bearings 17 are respectively provided with sealing rings 24. The rotating shaft 11 is provided with a shaft hole and the drill 3 is installed through the shaft hole. The barrel 16 is provided with the accommodating cavity. The side surface of the barrel 16 is provided with a window communicating with the accommodating cavity. The air inlet hole is arranged on the handpiece shell 14. The air guide pipe 13 is inserted into the air inlet hole. The front end of the air guide pipe 13 protrudes from the inner wall of the handpiece shell 14 and communicates with the accommodating cavity through the window of the barrel 16. In this scheme, by setting the barrel 16, the rotating shaft 11, the worm gear 12, the bearings 17 and the barrel 16 can be modularly pre-assembled. During assembly, only the barrel 16 needs to be assembled into the handpiece shell 14, which can improve the assembly efficiency, reduce the assembly error and facilitate maintenance and repair.

[0035] As one of the preferred schemes, the head 1 further comprises a button cover 18 and a first spring 19, the button cover 18 is slidingly installed above the top cover 15 and is elastically connected with the top cover 15 by the spring, the rotating shaft 11 is a pressing shaft, the upper end of the rotating shaft 11 protrudes out of the top cover 15, the middle part of the button cover 18 is provided with a boss protruding towards the rotating shaft 11, and in use, the rotating shaft 11 (i.e. the pressing shaft) can be pressed by pressing the button cover 18, so as to achieve the purpose of rapid braking.

[0036] As one of the preferred schemes, the rear end of the handle 2 is provided with an air inlet pipe 22, the air inlet pipe 22 is connected with the working air pipe 21 through a pressure stabilizer 23, the pressure stabilizer 23 comprises a pressure stabilizer shell 231, a second spring 232, a pressure stabilizer sliding block 233 and a pressure stabilizer core pipe 234, the two ends of the pressure stabilizer core pipe 234 are respectively communicated with the air inlet pipe 22 and the working air pipe 21, a pressure stabilizer sealing sleeve is sleeved outside the pressure stabilizer core pipe 234, and an annular cavity is formed between the pressure stabilizer core pipe 234 and the pressure stabilizer sealing sleeve, the pressure stabilizer sliding block 233 is located in the annular cavity and slidingly sleeved outside the pressure stabilizer core pipe 234 and is elastically connected with the pressure stabilizer shell 231 through the second spring 232, the pressure stabilizer core pipe 234 and the pressure stabilizer shell 231 are respectively provided with a first through hole and a second through hole which are axially offset, when the airflow pressure in the pressure stabilizer core pipe 234 does not exceed a set threshold value, the pressure stabilizer sliding block 233 can block the second through hole under the action of the second spring 232, when the airflow pressure in the pressure stabilizer core pipe 234 exceeds the set threshold value, the airflow can push the pressure stabilizer sliding block 233 to overcome the elastic force of the second spring 232 to unblock the second through hole, so that the first through hole and the second through hole are communicated to release air and reduce pressure. In this scheme, by arranging the pressure stabilizer 23, when the supply pressure of compressed air exceeds the set threshold value, the pressure stabilizer sliding block 233 can be automatically driven to move to make the first through hole and the second through hole communicated to release air and reduce pressure, so as to realize pressure stabilization, and the air pressure of the compressed air used to drive the worm gear 12 is more stable.

[0037] As one of the preferred schemes, the front end of the pressure stabilizer 23 is sealingly connected with the working air pipe 21 through the pressure stabilizer shell 231, and a sealing ring 24 is arranged between the pressure stabilizer shell 231 and the working air pipe 21, and the rear end of the pressure stabilizer 23 is sealingly connected with the air inlet pipe 22 through the pressure stabilizer core pipe 234, and a sealing ring 24 is arranged between the pressure stabilizer core pipe 234 and the air inlet pipe 22.

[0038] As one of the preferred schemes, the handle 2 is further provided with a water pipe 25 for supplying water to the water spraying hole of the head 1, the water pipe 25 is provided with a water filter 251 for filtering impurities at the inlet of the water pipe 25, the water filter 251 is sealingly connected with the water pipe 25 through the sealing ring 24, the water pipe 25 is further provided with a check valve 26 for preventing backward flow, the check valve 26 comprises a check valve core 261, a check valve body 262 and a check valve housing 263, the check valve housing 263 is fixedly connected to the front end of the check valve core 261 and a cavity is arranged between the check valve housing 263 and the check valve core 261, the check valve body 262 is located in the cavity and is connected to the front end of the check valve core 261, and the outlet of the check valve body 262 is a tapered structure gradually narrowing towards the front end. In the scheme, the check valve 26 is arranged to avoid the backward flow of the water supply in the water pipe 25.

[0039] As one of the preferred schemes, the working air pipe 21 is further bypassed with an atomizing pipe 27, the atomizing pipe 27 is communicated to the head 1 and is used for atomizing the water of the water spraying hole.

[0040] As one of the preferred schemes, the rear end of the handle 2 is provided with a handle joint 28, the handle joint 28 comprises a fixedly connected joint housing 281, a joint core 282 and a sealing member 283, the joint housing 281 is fixedly connected with the handle 2, the water pipe 25 and the air inlet pipe 22 are fixedly connected to the joint core 282 and are sealingly connected through the sealing member 283, and the joint housing 281 and the handle 2 are further provided with a soundproof cotton 284, the soundproof cotton 284 is wrapped around the air outlet hole arranged on the handle 2.

[0041] The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described in the specification. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

Claims

1. A high-speed turbine dental handpiece with air inlet hole belt steady pressure guide air pipe, comprising a handpiece head and a handle, a rotating shaft is pivotally connected in the handpiece head, a worm gear is fixedly connected on the rotating shaft, and the worm gear is located in a containing cavity in the handpiece head, characterized in that, The air inlet hole is provided with a wind guide pipe, the front end of the wind guide pipe is communicated with the accommodating cavity and faces the worm gear to drive the worm gear to rotate the rotating shaft, the rear end of the wind guide pipe protrudes from the rear end of the machine head and extends towards the handle, the rear end of the machine head is connected with the handle, the handle is provided with a working air pipe, and the front end of the working air pipe is connected with the wind guide pipe.

2. The high speed dental turbine handpiece with air inlet hole belt steady pressure guide air pipe according to claim 1, characterized in that, The inner hole of the wind guide pipe is a multi-section straight-through structure with gradually decreasing inner diameters from the rear end to the front end.

3. The high speed dental turbine handpiece with air inlet hole belt steady pressure guide air pipe according to claim 1, characterized in that, The front end of the wind guide pipe protrudes from the inner wall of the machine head and extends towards the worm gear, the wind guide pipe is detachably connected with the air inlet hole and the protruding length of the front end of the wind guide pipe can be adjusted.

4. The high-speed dental turbine handpiece with the air inlet hole belt steady pressure guide air pipe according to claim 3, characterized in that, The machine head comprises a machine head shell, a top cover, a barrel, the barrel is fixed in the machine head shell, the rotating shaft is pivotally connected in the barrel through two upper and lower bearings, the barrel and the two bearings are respectively provided with sealing rings, the rotating shaft is provided with a shaft hole and a needle is installed in the shaft hole, the barrel is provided with the accommodating cavity, the side of the barrel is provided with a window communicated with the accommodating cavity, the air inlet hole is arranged on the machine head shell, and the front end of the wind guide pipe protrudes from the inner wall of the machine head shell and is communicated with the accommodating cavity through the window of the barrel.

5. The high-speed dental turbine handpiece with the air inlet hole belt steady pressure guide air pipe according to claim 4, characterized in that, The machine head further comprises a button cover and a first spring, the button cover is slidably installed above the top cover and is elastically connected with the top cover through the spring, the rotating shaft is a pressing shaft, the upper end of the rotating shaft protrudes out of the top cover, and the middle part of the button cover is provided with a boss protruding towards the rotating shaft.

6. The high speed dental turbine handpiece with air inlet hole belt steady pressure guide air pipe according to claim 1, characterized in that, The rear end of the handle is provided with an air inlet pipe, the air inlet pipe and the working air pipe are connected through a pressure stabilizer, the pressure stabilizer comprises a pressure stabilizer shell, a second spring, a pressure stabilizer sliding block and a pressure stabilizer core pipe, the two ends of the pressure stabilizer core pipe are respectively communicated with the air inlet pipe and the working air pipe, a pressure stabilizer sealing sleeve is connected to the outside of the pressure stabilizer core pipe, and an annular cavity is formed between the pressure stabilizer core pipe and the pressure stabilizer sealing sleeve, the pressure stabilizer sliding block is located in the annular cavity and slidably sleeved on the outside of the pressure stabilizer core pipe and is elastically connected with the pressure stabilizer shell through the second spring, the pressure stabilizer core pipe and the pressure stabilizer shell are respectively provided with a first through hole and a second through hole which are axially offset, when the airflow pressure in the pressure stabilizer core pipe does not exceed a set threshold value, the pressure stabilizer sliding block can block the second through hole under the action of the second spring, when the airflow pressure in the pressure stabilizer core pipe exceeds the set threshold value, the airflow can push the pressure stabilizer sliding block to overcome the elastic force of the second spring to unblock the second through hole after passing through the first through hole, so that the first through hole and the second through hole are communicated to release the pressure.

7. The high-speed dental turbine handpiece with the air inlet hole belt steady pressure guide air pipe according to claim 6, characterized in that, The front end of the pressure stabilizer is sealingly connected with the working air pipe through the pressure stabilizer shell, and a sealing ring is arranged between the pressure stabilizer shell and the working air pipe, the rear end of the pressure stabilizer is sealingly connected with the air inlet pipe through the pressure stabilizer core pipe, and a sealing ring is arranged between the pressure stabilizer core pipe and the air inlet pipe.

8. The high speed dental turbine handpiece with air inlet hole belt steady pressure guide air pipe according to claim 1, characterized in that, The handle is further provided with a water pipe for supplying water to the water spraying hole of the machine head, a water filter for filtering out impurities is arranged at the inlet of the water pipe, the water filter is sealingly connected with the water pipe through a sealing ring, and a check valve for preventing backward flow is further arranged on the water pipe, the check valve comprises a check valve core, a check valve body and a check valve shell, the check valve shell is fixedly connected to the front end of the check valve core and an annular cavity is arranged between the check valve core and the check valve shell, the check valve body is located in the annular cavity and connected to the front end of the check valve core, and the outlet of the check valve body is a tapered structure gradually narrowing towards the front end.

9. The high-speed dental turbine handpiece with the air inlet hole belt steady pressure guide air pipe according to claim 8, characterized in that, The working air pipe is also bypassed with an atomizing pipe, which is communicated to the machine head and used for atomizing water of the water spraying hole.

10. The high-speed dental turbine handpiece with the air inlet hole belt steady pressure guide air pipe according to claim 8, characterized in that, The rear end of the handle is provided with a handle joint, which comprises a fixedly connected joint shell, a joint core and a sealing element, the water pipe and the air inlet pipe are fixedly connected to the joint core and sealed by the sealing element, and the joint shell is provided with soundproof cotton between the handle, which covers the air outlet hole arranged on the handle.

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