CN215875013U

CN215875013U - Novel adjustable elasticity, dental handpiece that makes an uproar falls

Info

Publication number: CN215875013U
Application number: CN202122463219.3U
Authority: CN
Inventors: 张燕; 侯冉; 梁景瑞; 邢劲松
Original assignee: Second Hospital of Shanxi Medical University
Current assignee: Second Hospital of Shanxi Medical University
Priority date: 2021-10-13
Filing date: 2021-10-13
Publication date: 2022-02-22
Anticipated expiration: 2031-10-13

Abstract

The utility model discloses a novel dental handpiece with adjustable tightness and noise reduction, which comprises a handpiece and a handle, wherein the handpiece is provided with a handle; the machine head comprises a shell and a clamping shaft, wherein a front cover component and a rear cover component are detachably connected to two ends of the shell, the clamping shaft penetrates through the front cover component, first thread grooves are formed in the front cover component and the rear cover component, a second thread groove is formed in the shell, and a water spraying component and a lighting component are fixedly connected to the front cover component; a turbine mechanism is arranged in the shell and comprises a turbine assembly and two bearings, a clamping assembly is fixedly connected to the outer side wall of each bearing and is in threaded connection with the first threaded groove and the second threaded groove respectively, a noise reduction assembly is fixedly connected to the turbine assembly, and a noise reduction layer is fixedly arranged on the shell; the handle includes the handle shell, has seted up the passageway subassembly in the handle shell, and the passageway subassembly communicates with water spray subassembly, lighting components, turbine subassembly respectively. The utility model can realize the adjustable tightness of the bearing, reduce the noise of the dental handpiece in the using process and improve the comfort of the patient.

Description

Novel adjustable elasticity, dental handpiece that makes an uproar falls

Technical Field

The utility model relates to the field of medical instruments, in particular to a novel dental handpiece with adjustable tightness and noise reduction.

Background

In the process of oral surgery, teeth often need to be cut, drilled, ground and the like, and a high-speed pneumatic turbine handpiece is one of the main treatment tools. The utility model of the high-speed pneumatic turbine handpiece can be an important breakthrough in oral medical instruments, which not only can relieve the pain of patients in the treatment process, but also can improve the efficiency and the effect of clinical treatment. Meanwhile, with the advent of high-speed pneumatic turbine mobile phones, the comprehensive development of the high-speed pneumatic turbine mobile phone technology is promoted. In short years, in most countries and regions around the world, the high-speed pneumatic turbine handpiece almost replaces a low-speed electric handpiece, and contributes to clinical application of dentistry and prevention and treatment of oral diseases.

The existing high-speed pneumatic turbine handpiece is easy to generate noise when running at high speed, and the comfort of a patient is seriously influenced. In addition, because the existing dental handpiece has high rotating speed, the ball of the bearing is easy to wear, noise is generated, and the service life of the bearing is shortened. Therefore, a new dental handpiece is needed to solve the above problems, and to achieve adjustable bearing tightness, and simultaneously reduce the noise of the dental handpiece during use, and improve the comfort of the patient.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a novel dental handpiece with adjustable tightness and noise reduction, which solves the problems in the prior art, can realize the tightness adjustment of a bearing, simultaneously reduces the noise of the dental handpiece in the use process and improves the comfort of a patient.

In order to achieve the purpose, the utility model provides the following scheme: the utility model provides a novel dental handpiece with adjustable tightness and noise reduction, which comprises a handpiece and a handle, wherein the handpiece is provided with a clamping mechanism;

the handpiece comprises a shell and a clamping shaft arranged in an inner cavity of the shell, a front cover assembly and a rear cover assembly are detachably connected to two ends of the shell, the clamping shaft penetrates through the front cover assembly, first thread grooves are formed in the inner side walls of the front cover assembly and the rear cover assembly, a second thread groove is formed in the inner side wall of the shell, and a water spraying assembly and a lighting assembly are fixedly connected to the end surface of the front cover assembly;

the turbine mechanism is arranged in the shell and comprises a turbine assembly and two bearings arranged on two sides of the turbine assembly, the turbine assembly and the bearings are sleeved on the outer side wall of the clamping shaft, the clamping shaft is fixedly arranged on the inner side wall of the shell through the bearings, a clamping assembly is fixedly connected to the outer side wall of each bearing, the clamping assembly is respectively in threaded connection with the first threaded groove and the second threaded groove, a noise reduction assembly is fixedly connected to the turbine assembly, and a noise reduction layer is fixedly arranged on the inner side wall, facing the turbine assembly, of the shell;

the handle comprises a handle shell, the handle shell is detachably connected with the shell, a channel assembly is arranged in the handle shell, and the channel assembly is communicated with the water spraying assembly, the lighting assembly and the turbine assembly respectively.

Preferably, the turbine assembly comprises a turbine fixedly connected to the clamping shaft, one end, far away from the clamping shaft, of a blade of the turbine is fixedly connected with a flow guide layer, the thickness of one side, close to the turbine blade, of the flow guide layer is larger than that of the other side of the flow guide layer, and a drainage groove is formed in the middle of one side, far away from the clamping shaft, of the flow guide layer;

the utility model discloses a turbine blade, including the turbine blade, fall make an uproar subassembly, fall the subassembly of making an uproar include the fixed block and with the connecting block of fixed block rigid coupling, the fixed block rigid coupling is in the water conservancy diversion layer is kept away from the both ends department of one side of double-layered axle, the connecting block rigid coupling is in the fixed block with between the water conservancy diversion layer, the cross-section of connecting block is triangle-shaped, the connecting block the fixed block the water conservancy diversion layer the blade of turbine is integrated into one piece.

Preferably, the front cover assembly comprises a front cover and a front cover connecting piece fixedly connected with the front cover, the front cover connecting piece is detachably connected with the end part of the shell, the clamping shaft sequentially penetrates through the center of the front cover and the center of the front cover connecting piece, and the front cover is provided with a water spraying through hole and a lighting through hole;

the inner side wall of the mounting groove of the front cover connecting piece is provided with the first thread groove, the water spraying assembly is installed in the water spraying through hole, and the lighting assembly is installed in the lighting through hole.

Preferably, the rear cover assembly comprises a rear cover, a rear cover connecting piece detachably connected with the rear cover, and a connecting spring, wherein a support button is fixedly connected to the end surface of the rear cover close to the rear cover connecting piece, a support seat is fixedly connected to the end surface of the rear cover connecting piece close to the rear cover, and the connecting spring is installed between the support seat and the support button;

the rear cover connecting piece and the end part of the shell far away from the front cover connecting piece are detachably connected, the rear cover connecting piece is far away from the end face of the rear cover, a mounting groove is formed in the end face of the rear cover, and the inner side wall of the mounting groove of the rear cover connecting piece is provided with the first thread groove.

Preferably, the channel assembly comprises an air inlet pipeline, an air exhaust pipeline, a water supply pipeline, an atomizing air pipeline and two optical fiber channels;

the air inlet pipeline with the exhaust duct with the turbine intercommunication, water supply pipeline with atomizing gas pipeline with water spray assembly intercommunication, two the fiber channel with lighting assembly intercommunication.

Preferably, the water spray assembly includes a spray head installed in the water spray through hole, the spray head is communicated with the water supply pipeline and the atomizing gas pipeline, and the spray head is disposed obliquely.

Preferably, a needle is detachably connected in the clamp shaft, and the water outlet direction of the plurality of nozzles faces to the tip end of the needle.

Preferably, the lighting assembly comprises an LED lamp and an optical fiber rod, the LED lamp is fixedly mounted on the inner side wall of the handle shell and electrically connected with an external power supply, one end of the optical fiber rod is connected with the LED lamp, and the other end of the optical fiber rod penetrates through the optical fiber channel and extends into the lighting through hole.

Preferably, the joint subassembly includes first external screw thread and second external screw thread, first external screw thread with the equal rigid coupling of second external screw thread is in on the lateral wall of bearing, first external screw thread with first thread groove threaded connection, the second external screw thread with second thread groove threaded connection.

Preferably, a plurality of seal grooves have been seted up on the inside wall of casing, can dismantle in the seal groove and be connected with the sealing ring, the sealing ring include the cotton layer of bubble and with the rubber layer that the seal groove contact is connected, the cotton layer rigid coupling of bubble is in the rubber layer is kept away from one side of seal groove, and the cotton layer of bubble with the lateral wall conflict of bearing is connected.

The utility model discloses the following technical effects: the inner side walls of the front cover component and the rear cover component are respectively provided with a first thread groove, the inner side wall of the shell is provided with a second thread groove, the outer side wall of the bearing is fixedly connected with a clamping component, the clamping component is respectively in threaded connection with the first thread groove and the second thread groove, and the bearing clearance between the inner side wall and the outer side wall of the bearing is adjusted by adjusting the positions of the clamping component and the first thread groove and the second thread groove, so that the tightness degree of the installation of the bearing is adjusted, the service life of the bearing is prolonged, and the bearing is prevented from generating large noise after being worn for a period of time;

according to the utility model, the water spray assembly and the illumination assembly are fixedly connected to the end face of the front cover assembly, the channel assembly is arranged in the handle shell and is respectively communicated with the water spray assembly, the illumination assembly and the turbine assembly, and cooling water flow sprayed by the water spray assembly can effectively cool heat generated by the dental handpiece during cutting and grinding teeth, so that the service life of the dental handpiece is prolonged and the use experience of a patient is improved; the illumination component provides illumination, so that a doctor can conveniently observe the oral cavity of a patient in the treatment process, and the operation difficulty is reduced;

the turbine mechanism comprises a turbine assembly and two bearings arranged on two sides of the turbine assembly, wherein the turbine assembly and the bearings are sleeved on the outer side wall of a clamping shaft, the clamping shaft is fixedly arranged on the inner side wall of a shell through the bearings, a noise reduction assembly is fixedly connected to the turbine assembly, and a noise reduction layer is fixedly arranged on the inner side wall, facing the turbine assembly, of the shell; the noise reduction layer and the noise reduction assembly can effectively reduce the noise of the dental handpiece in the operation process, and the comfort level of a patient is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural view of the novel adjustable-tightness noise-reduction dental handpiece of the present invention;

FIG. 2 is a schematic structural view of the housing of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is a partial enlarged view of B in FIG. 2;

FIG. 5 is a front view of the front cover assembly of the present invention;

FIG. 6 is a cross-sectional view of the handle housing of the present invention;

wherein, 1, a machine head; 2. a housing; 3. a clamp shaft; 4. a first thread groove; 5. a second thread groove; 6. a bearing; 7. a noise reduction layer; 8. a handle housing; 9. a turbine; 10. a flow guiding layer; 11. a drainage groove; 12. a fixed block; 13. connecting blocks; 14. a front cover; 15. a front cover attachment; 16. a water spray through hole; 17. an illumination through hole; 18. A rear cover; 19. a rear cover connector; 20. a connecting spring; 21. an air intake duct; 22. an exhaust duct; 23. a water supply pipeline; 24. an atomizing gas conduit; 25. a fiber channel; 26. a spray head; 27. needle turning; 28. an LED lamp; 29. An optical fiber rod; 30. a first external thread; 31. a second external thread; 32. a sealing groove; 33. a rubber layer; 34. and (5) soaking a cotton layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Referring to fig. 1-6, the utility model provides a novel dental handpiece with adjustable tightness and noise reduction, which comprises a handpiece 1 and a handle;

the handpiece 1 comprises a shell 2 and a clamping shaft 3 arranged in an inner cavity of the shell 2, a front cover assembly and a rear cover assembly are detachably connected to two ends of the shell 2, the clamping shaft 3 penetrates through the front cover assembly, first thread grooves 4 are formed in the inner side walls of the front cover assembly and the rear cover assembly respectively, a second thread groove 5 is formed in the inner side wall of the shell 2, and a water spraying assembly and a lighting assembly are fixedly connected to the end surface of the front cover assembly;

a turbine mechanism is installed in the shell 2, the turbine mechanism comprises a turbine assembly and two bearings 6 arranged on two sides of the turbine assembly, the turbine assembly and the bearings 6 are both sleeved on the outer side wall of the clamping shaft 3, the clamping shaft 3 is fixedly installed on the inner side wall of the shell 2 through the bearings 6, a clamping assembly is fixedly connected to the outer side wall of the bearings 6, the clamping assembly is respectively in threaded connection with the first threaded groove 4 and the second threaded groove 5, a noise reduction assembly is fixedly connected to the turbine assembly, and a noise reduction layer 7 is fixedly installed on the inner side wall, facing the turbine assembly, of the shell 2; by adjusting the positions of the clamping assembly, the first thread groove 4 and the second thread groove 5, the bearing clearance between the inner side wall and the outer side wall of the bearing 6 is adjusted, the tightness degree of the installation of the bearing 6 is adjusted, the service life of the bearing 6 is prolonged, and the bearing 6 is prevented from generating large noise after being worn for a period of time; the noise reduction layer 7 and the noise reduction assembly can effectively reduce the noise of the dental handpiece in the operation process, and the comfort of a patient is improved.

The handle comprises a handle shell 8, the handle shell 8 is detachably connected with the shell 2, a channel assembly is arranged in the handle shell 8, and the channel assembly is respectively communicated with the water spraying assembly, the lighting assembly and the turbine assembly; by the arrangement, the cooling water flow sprayed by the water spraying component can effectively cool heat generated by the dental handpiece during cutting and grinding teeth, so that the service life of the dental handpiece is prolonged, and the use experience of a patient is improved; the illumination assembly provides illumination, so that a doctor can observe the oral cavity of a patient conveniently in the treatment process, and the operation difficulty is reduced.

According to a further optimized scheme, the turbine assembly comprises a turbine 9 fixedly connected to the clamping shaft 3, one end, far away from the clamping shaft 3, of a blade of the turbine 9 is fixedly connected with a flow guide layer 10, the thickness of one side, close to the blade of the turbine 9, of the flow guide layer 10 is larger than that of the other side, and a flow guide groove 11 is formed in the middle of one side, far away from the clamping shaft 3, of the flow guide layer 10; the thickness of the flow guide layer 10 is gradually reduced along the direction far away from the blades of the turbine 9, and the thickness of the fixed connection part of the flow guide layer 10 and the blades of the turbine 9 is the same as that of the turbine blades, so that the flow guide layer 10 guides the airflow flowing through the tail ends of the blades of the turbine 9, and the airflow disturbance is small; the flow guide grooves 11 are arranged on the windward side of the blades of the turbine 9, and the flow guide grooves 11 guide the air flow blown into the turbine 9, so that the resistance of the turbine 9 to the air flow acting is reduced, and the noise caused by air flow disturbance is avoided;

the noise reduction assembly comprises a fixed block 12 and a connecting block 13 fixedly connected with the fixed block 12, the fixed block 12 is fixedly connected at two ends of one side of the flow guide layer 10 far away from the clamping shaft 3, the connecting block 13 is fixedly connected between the fixed block 12 and the flow guide layer 10, the section of the connecting block 13 is triangular, and the connecting block 13, the fixed block 12, the flow guide layer 10 and blades of the turbine 9 are integrally formed; with the arrangement, the fixed block 12 reduces the gap between the two ends of the diversion layer 10 and the inner side wall of the shell 2, and is transited with the drainage groove 11 through the connecting block 13; on one hand, the fixed blocks 12 block the back suction of pollutants caused by the high-speed rotation of the turbine 9, and on the other hand, the two fixed blocks 12 are fixedly connected to the two ends of the flow guide layer, so that the structure of the turbine 9 is symmetrical, the turbulence of the accessories of the turbine 9 is reduced, and the noise reduction effect is achieved.

According to a further optimized scheme, the front cover assembly comprises a front cover 14 and a front cover connecting piece 15 fixedly connected with the front cover 14, the front cover connecting piece 15 is detachably connected with the end part of the shell 2, the clamping shaft 3 sequentially penetrates through the center of the front cover 14 and the center of the front cover connecting piece 15, and the front cover 14 is provided with a water spraying through hole 16 and a lighting through hole 17;

a mounting groove is formed in the front cover connecting piece 15, a first thread groove 4 is formed in the inner side wall of the mounting groove of the front cover connecting piece 15, the water spraying assembly is mounted in the water spraying through hole 16, and the lighting assembly is mounted in the lighting through hole 17; the front cover connecting piece 15 is in threaded connection with the end part of the shell 2, so that the front cover connecting piece 15 and the shell 2 can be conveniently and rapidly installed and detached, the installation groove is used for providing an installation space for the bearing 6, and the clamping component is in threaded connection with the first thread groove 4 on the inner side wall of the installation groove of the front cover connecting piece 15, so that the installation and tightness adjustment of the bearing 6 are realized; the illuminating assembly illuminates the outside of the front cover 14 of the dental handpiece through the illuminating through hole 17, and the water spraying assembly sprays cooling water to the outside of the front cover of the dental handpiece through the water spraying through hole 16, so that the illuminating and cooling functions are realized.

According to a further optimized scheme, the rear cover assembly comprises a rear cover 18, a rear cover connecting piece 19 and a connecting spring 20, wherein the rear cover connecting piece 19 is detachably connected with the rear cover 18, a supporting button is fixedly connected to the end face, close to the rear cover connecting piece 19, of the rear cover 18, a supporting seat is fixedly connected to the end face, close to the rear cover 18, of the rear cover connecting piece 19, and the connecting spring 20 is installed between the supporting seat and the supporting button;

the rear cover connecting piece 19 is detachably connected with the end part of the shell 2 far away from the front cover connecting piece 15, an installation groove is formed in the end face, far away from the rear cover 18, of the rear cover connecting piece 19, and a first thread groove 4 is formed in the inner side wall of the installation groove of the rear cover connecting piece 19; rear cover connecting piece 19 passes through threaded connection with the tip of casing 2, so set up, when installing the rear cover subassembly, install coupling spring 20 between supporting seat and support button, pass through threaded connection through rear cover connecting piece 19 and the tip of casing 2, be convenient for rear cover connecting piece 19 and casing 2's quick installation and dismantlement, rear cover connecting piece 19's mounting groove is used for providing installation space for bearing 6, 4 threaded connection of first thread groove on the inside wall of the mounting groove through joint subassembly and rear cover connecting piece 19, realize bearing 6's installation and elasticity regulation.

In a further optimized scheme, the channel assembly comprises an air inlet pipeline 21, an exhaust pipeline 22, a water supply pipeline 23, an atomized air pipeline 24 and two optical fiber channels 25;

the air inlet pipeline 21 and the air outlet pipeline 22 are communicated with the turbine 9, the water supply pipeline 23 and the atomizing air pipeline 24 are communicated with the water spraying assembly, and the two optical fiber channels 25 are communicated with the lighting assembly; in this arrangement, the inlet duct 21 is used for blowing high-speed gas into the turbine 9, and the high-speed gas drives the turbine 9 and is then discharged through the exhaust duct 22; the optical fiber channel 25 is used for installing the lighting assembly, and the atomizing air pipeline 24 and the water supply pipeline 23 are used for introducing high-speed cooling water into the water spray assembly, so that heat generated when the dental handpiece is used for cutting and grinding teeth is effectively cooled, the service life of the dental handpiece is prolonged, and the use experience of a patient is improved.

In a further optimized scheme, the water spraying assembly comprises a spray head 26 arranged in the water spraying through hole 16, the spray head 26 is communicated with the water supply pipeline 23 and the atomizing air pipeline 24, and the spray head 26 is obliquely arranged; a needle 27 is detachably connected in the clamp shaft 3, and the water outlet directions of the plurality of nozzles 26 face the tip end of the needle 27; so set up for the high-speed cooling water that the delivery port of shower nozzle 26 is spun like the pointed end of car needle 27, makes the cooling water cool off car needle 27 fast and the heat that produces with patient's tooth contact surface, provides cooling efficiency.

Further optimize the scheme, be equipped with check valve (not shown in the figure) in inlet channel 21, water supply pipeline 23, the atomizing air pipe way 24, so set up for gas and the one-way flow of liquid that lets in inlet channel 21, water supply pipeline 23, the atomizing air pipe way 24, the pollutant resorption that further avoids high-speed rotatory turbine 9 to arouse reduces because of the harm that the pollutant resorption caused patient's oral cavity and dental handpiece.

According to a further optimized scheme, the lighting assembly comprises an LED lamp 28 and an optical fiber rod 29, the LED lamp 28 is fixedly installed on the inner side wall of the handle shell 8, the LED lamp 28 is electrically connected with an external power supply, one end of the optical fiber rod 29 is connected with the LED lamp 28, and the other end of the optical fiber rod 29 penetrates through the optical fiber channel 25 and extends into the lighting through hole 17; so set up, for the power supply of LED lamp 28 through external power supply, the light that LED lamp 28 sent is through the leading-in illumination through-hole 17 of optic fibre stick 29 in, throws light on to dental handpiece's protecgulum 14 through illumination through-hole 17 outward, realizes observing the patient oral cavity to making things convenient for the doctor in the treatment process, reduces the operation degree of difficulty.

In a further optimized scheme, the clamping assembly comprises a first external thread 30 and a second external thread 31, the first external thread 30 and the second external thread 31 are fixedly connected to the outer side wall of the bearing 6, the first external thread 30 is in threaded connection with the first thread groove 4, and the second external thread 31 is in threaded connection with the second thread groove 5; the first external thread 30 and the second external thread 31 are integrally formed with the outer side walls of the bearings 6, and are in threaded connection with the first thread groove 4 through the first external thread 30, so that the outer side walls of the two bearings 6 are in threaded connection with the front cover connecting piece 15 and the rear cover connecting piece 19 respectively; through second external thread 31 and 5 threaded connection of second thread groove for the lateral wall of two bearings 6 and the inside wall threaded connection of casing 2, so set up, after bearing 6 produces wearing and tearing in using a period, through first external thread 30 on the 6 lateral walls of adjustment bearing, second external thread 31 and first thread groove 4, the position of second thread groove 5, realize the bearing play of 6 inside walls of adjustment bearing and lateral wall, realize the elasticity degree of adjusting the installation of bearing 6, and then the noise reduction.

According to the further optimized scheme, a plurality of sealing grooves 32 are formed in the inner side wall of the shell 2, sealing rings are detachably connected in the sealing grooves 32 and comprise foam layers 34 and rubber layers 33 in contact connection with the sealing grooves 32, the foam layers 34 are fixedly connected to one sides, far away from the sealing grooves 32, of the rubber layers 33, and the foam layers 34 are in abutting connection with the outer side wall of the bearing 6; so set up, the cotton layer 34 of bubble and rubber layer 33 carry out the centre gripping to the lateral wall of bearing 6, increase the stability after the bearing 6 installation, and the cotton layer 34 of bubble adsorbs the noise in the 6 working process of bearing simultaneously, further reduces dental handpiece's operating noise, improves patient's comfort level.

The using method comprises the following steps:

1. assembling: before the dental handpiece is used for operating the oral cavity of a patient, the tail end of a handle of the dental handpiece needs to be installed on a treatment table, and a doctor supplies air and water to the dental handpiece through the treatment table; the external power supply supplies power to the medical needle holder, then the needle 27 with a proper model is selected according to the specific condition of a patient, and the needle 27 is arranged in the clamping shaft 3 to finish the assembly;

2. debugging: a doctor adjusts the flow rate of water supply and the pressure of air supply to proper values by controlling a foot switch of the treatment table, an external power supply is turned on to enable the LED lamp 28 to emit light, the light emitted by the LED lamp 28 is guided into the illumination through hole 17 through the optical fiber rod 29, and the exterior of the front cover 14 of the dental handpiece is illuminated through the illumination through hole 17, so that the doctor can conveniently observe the oral cavity of a patient in the treatment process, and the operation difficulty is reduced;

3. use of: a doctor holds a handle of the dental handpiece, the car needle 27 is aimed at an oral affected part of a patient for treatment, the flow rate of water supply and the pressure of air supply are controlled by controlling a foot switch of a treatment table, the rotation rate of the car needle 27 and the flow rate of cooling water sprayed by the spray head 26 are further controlled, the foot switch is released after treatment is finished, air supply and water supply to the dental handpiece are stopped, the car needle 27 is detached from the clamping shaft 3 after the turbine 9 stops rotating, then the handle tail end of the dental handpiece is detached from the treatment table, and the dental handpiece is sterilized and disinfected;

4. maintenance: when the dental handpiece is used for a period of time, the front cover connecting piece 15 and the shell 2 of the dental handpiece are respectively disassembled, and the back cover connecting piece 19 and the shell 2 are respectively disassembled; according to the wear degree of the bearing 6, the relative positions of a second external thread 31 on the outer side wall of the bearing 6 and a second thread groove 5 on the inner side wall of the shell 2 are adjusted, and then the relative positions of a first external thread 30 on the outer side wall of the bearing 6 and a first thread groove 4 on the front cover connecting piece 15 and the rear cover connecting piece 19 are adjusted, so that the bearing clearance between the inner side wall and the outer side wall of the bearing 6 is adjusted, the tightness degree of the installation of the bearing 6 is adjusted, and the noise of the bearing 6 caused by wear is reduced; after adjustment, the front cover 15 and the rear cover 19 are mounted on the housing 2.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.

Claims

1. A novel adjustable tightness and noise reduction dental handpiece is characterized by comprising: a handpiece (1) and a handle;

the machine head (1) comprises a shell (2) and a clamping shaft (3) arranged in an inner cavity of the shell (2), a front cover assembly and a rear cover assembly are detachably connected to two ends of the shell (2), the clamping shaft (3) penetrates through the front cover assembly, first thread grooves (4) are formed in the inner side walls of the front cover assembly and the rear cover assembly respectively, second thread grooves (5) are formed in the inner side wall of the shell (2), and a water spraying assembly and a lighting assembly are fixedly connected to the end face of the front cover assembly;

a turbine mechanism is installed in the shell (2), the turbine mechanism comprises a turbine assembly and two bearings (6) arranged on two sides of the turbine assembly, the turbine assembly and the bearings (6) are sleeved on the outer side wall of the clamping shaft (3), the clamping shaft (3) is fixedly installed on the inner side wall of the shell (2) through the bearings (6), a clamping assembly is fixedly connected to the outer side wall of the bearings (6), the clamping assembly is in threaded connection with the first thread groove (4) and the second thread groove (5) respectively, a noise reduction assembly is fixedly connected to the turbine assembly, and a noise reduction layer (7) is fixedly installed on the inner side wall, facing the turbine assembly, of the shell (2);

the handle comprises a handle shell (8), the handle shell (8) is detachably connected with the shell (2), a channel assembly is arranged in the handle shell (8), and the channel assembly is respectively communicated with the water spraying assembly, the lighting assembly and the turbine assembly.

2. The novel adjustable-tightness noise-reducing dental handpiece according to claim 1, wherein: the turbine assembly comprises a turbine (9) fixedly connected to the clamping shaft (3), one end, far away from the clamping shaft (3), of a blade of the turbine (9) is fixedly connected with a flow guide layer (10), the thickness of one side, close to the blade of the turbine (9), of the flow guide layer (10) is larger than that of the other side of the flow guide layer, and a flow guide groove (11) is formed in the middle of one side, far away from the clamping shaft (3), of the flow guide layer (10);

the subassembly of making an uproar falls including fixed block (12) and with connecting block (13) of fixed block (12) rigid coupling, fixed block (12) rigid coupling is in flow guide layer (10) are kept away from the both ends department of one side of double-layered axle (3), connecting block (13) rigid coupling is in fixed block (12) with between flow guide layer (10), the cross-section of connecting block (13) is triangle-shaped, connecting block (13) fixed block (12) flow guide layer (10) the blade of turbine (9) is integrated into one piece.

3. The novel adjustable-tightness noise-reducing dental handpiece of claim 2, wherein: the front cover assembly comprises a front cover (14) and a front cover connecting piece (15) fixedly connected with the front cover (14), the front cover connecting piece (15) is detachably connected with the end part of the shell (2), the clamping shaft (3) sequentially penetrates through the center of the front cover (14) and the center of the front cover connecting piece (15), and the front cover (14) is provided with a water spraying through hole (16) and a lighting through hole (17);

a mounting groove is formed in the front cover connecting piece (15), the inner side wall of the mounting groove of the front cover connecting piece (15) is provided with the first thread groove (4), the water spraying assembly is mounted in the water spraying through hole (16), and the lighting assembly is mounted in the lighting through hole (17).

4. The novel adjustable-tightness noise-reducing dental handpiece of claim 3, wherein: the rear cover assembly comprises a rear cover (18), a rear cover connecting piece (19) detachably connected with the rear cover (18) and a connecting spring (20), a supporting button is fixedly connected to the end face, close to the rear cover connecting piece (19), of the rear cover (18), a supporting seat is fixedly connected to the end face, close to the rear cover (18), of the rear cover connecting piece (19), and the connecting spring (20) is installed between the supporting seat and the supporting button;

back lid connecting piece (19) with casing (2) are kept away from the tip of protecgulum connecting piece (15) can be dismantled and is connected, keeping away from of back lid connecting piece (19) seted up mounting groove on the terminal surface of back lid (18), seted up on the inside wall of mounting groove of back lid connecting piece (19) first thread groove (4).

5. The novel adjustable-tightness noise-reducing dental handpiece of claim 4, wherein: the channel assembly comprises an air inlet pipeline (21), an air exhaust pipeline (22), a water supply pipeline (23), an atomizing air pipeline (24) and two optical fiber channels (25);

the air inlet pipeline (21) and the air outlet pipeline (22) are communicated with the turbine (9), the water supply pipeline (23) and the atomizing air pipeline (24) are communicated with the water spray assembly, and the two optical fiber channels (25) are communicated with the lighting assembly.

6. The novel adjustable-tightness noise-reducing dental handpiece of claim 5, wherein: the water spray assembly comprises a spray head (26) installed in the water spray through hole (16), the spray head (26) is communicated with the water supply pipeline (23) and the atomizing air pipeline (24), and the spray head (26) is obliquely arranged.

7. The novel adjustable-tightness noise-reducing dental handpiece of claim 6, wherein: a needle (27) is detachably connected in the clamp shaft (3), and the water outlet directions of the plurality of spray heads (26) face the tip end of the needle (27).

8. The novel adjustable-tightness noise-reducing dental handpiece of claim 5, wherein: the lighting assembly comprises an LED lamp (28) and an optical fiber rod (29), the LED lamp (28) is fixedly installed on the inner side wall of the handle shell (8), the LED lamp (28) is electrically connected with an external power supply, one end of the optical fiber rod (29) is connected with the LED lamp (28), and the other end of the optical fiber rod (29) penetrates through the optical fiber channel (25) and extends into the lighting through hole (17).

9. The novel adjustable-tightness noise-reducing dental handpiece according to claim 1, wherein: the joint subassembly includes first external screw thread (30) and second external screw thread (31), first external screw thread (30) with the equal rigid coupling of second external screw thread (31) is in on the lateral wall of bearing (6), first external screw thread (30) with first thread groove (4) threaded connection, second external screw thread (31) with second thread groove (5) threaded connection.

10. The novel adjustable-tightness noise-reducing dental handpiece according to claim 1, wherein: seted up a plurality of seal grooves (32) on the inside wall of casing (2), can dismantle in seal groove (32) and be connected with the sealing ring, the sealing ring include the cotton layer of bubble (34) and with rubber layer (33) that seal groove (32) contact is connected, the cotton layer of bubble (34) rigid coupling is in rubber layer (33) is kept away from one side of seal groove (32), and the cotton layer of bubble (34) with the lateral wall conflict of bearing (6) is connected.