CN210784750U - Anti-suck-back high-speed pneumatic turbine dental handpiece - Google Patents
Anti-suck-back high-speed pneumatic turbine dental handpiece Download PDFInfo
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- CN210784750U CN210784750U CN201921307474.5U CN201921307474U CN210784750U CN 210784750 U CN210784750 U CN 210784750U CN 201921307474 U CN201921307474 U CN 201921307474U CN 210784750 U CN210784750 U CN 210784750U
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- handpiece
- bearing
- dental handpiece
- wind wheel
- shaft seal
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- 230000005855 radiation Effects 0.000 claims description 3
- 239000003344 environmental pollutant Substances 0.000 abstract description 7
- 231100000719 pollutant Toxicity 0.000 abstract description 7
- 206010011409 Cross infection Diseases 0.000 abstract description 6
- 206010029803 Nosocomial infection Diseases 0.000 abstract description 6
- 230000000642 iatrogenic effect Effects 0.000 abstract description 6
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003137 locomotive effect Effects 0.000 description 2
- 210000000214 mouth Anatomy 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000001225 therapeutic effect Effects 0.000 description 2
- 241000883990 Flabellum Species 0.000 description 1
- 229910052770 Uranium Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a prevent high-speed pneumatic turbine dental handpiece of resorption, its characterized in that: the inner wall of the handpiece is provided with an annular groove and the annular groove is provided with a resorption hole which communicates the inside of the handpiece with the inside of the handle, when the dental handpiece is closed, the airflow reflows to the inside of the handpiece from the inside of the handle, thereby reducing the negative pressure of the air inside the handpiece after the dental handpiece stops rotating, the bearing chamber inside the handpiece is provided with a shaft seal chamber in the direction of the front end of the handpiece, a fan-shaped shaft seal is arranged in the shaft seal chamber and is arranged on the mandrel, the fan-shaped shaft seal discharges the air in the shaft seal chamber of the spiral blade outwards through the spiral blade of the fan-shaped shaft seal to offset a part of the air pressure of the external air, thereby more effectively preventing the suck-back phenomenon of the high-speed pneumatic turbine dental handpiece, effectively avoiding iatrogenic cross infection caused by the fact that pollutants at the front end of the handpiece are sucked into the handpiece, the high-speed pneumatic turbine dental handpiece which prevents the suck-back through the utility model further improves the safety performance of the dental handpiece.
Description
Technical Field
The utility model relates to the field of medical equipment, especially, relate to a high-speed pneumatic turbine dental handpiece of preventing resorption in dental instrument field.
Background
The existing high-speed turbine dental handpiece mainly comprises a handpiece, a rear cover, a machine core and a handle, wherein compressed air blows a wind wheel to rotate to generate power, the existing high-speed dental drill handpiece generates a suck-back phenomenon when a tooth is ground, and the suck-back phenomenon of the dental handpiece can cause iatrogenic cross infection.
When a doctor uses the high-speed turbine dental handpiece to drill and grind teeth, the wind wheel chamber is in a positive air pressure state when compressed air enters the handpiece body from the air inlet to blow the wind wheel to rotate, no suck-back is generated at the moment, when the doctor wants to stop the handpiece, the compressed air flow disappears from the air inlet of the handpiece, the wind wheel rotates at high speed with inertia and continues to rotate for a period of time, and the wind wheel chamber gradually changes into negative pressure. Because the air inlet is not supplied with compressed air, the rotating wind wheel can suck air from gaps at the upper end and the lower end of the machine head body and exhaust the air to the air inlet and the air outlet. At this time, if the nose touches the oral pollution liquid or the atomized pollution water drops suspended in the air in the oral cavity or the fine particles of the ground teeth are easily sucked into the wind wheel cavity of the nose and are arranged to the air inlet and outlet, thereby polluting the parts (such as the wind wheel, the bearing and the like) in the nose cavity and the air inlet and outlet pipeline, and even transmitting the parts to the pipeline of the therapeutic machine and the related parts of the therapeutic machine. When the doctor treats the next patient, the pollutants adhered in the handpiece cavity of the dental handpiece and the pollutants in the corresponding pipelines and parts of the treatment machine are sprayed to the oral cavity of the next patient along with the compressed air flow, so that iatrogenic cross infection is formed.
In view of the above problems, most of the prior art focuses on a suck-back prevention device on one side of the needle to prevent the suck-back phenomenon of negative pressure caused by inertial rotation after the wind wheel stops blowing, for example, the related patents of the prior elastic shaft seal cover can complete the sealing and braking functions at the moment when the wind wheel stops blowing air, and the sealing function can prevent pollutants from being sucked into the wind wheel chamber. However, it should be noted that at this moment, the wind wheel chamber is still in a negative pressure state, and the outside atmosphere needs to be supplemented to balance with the outside atmospheric pressure. Because a larger gap exists between the button on one side of the back cover of the machine head and the main body of the back cover, the air is naturally supplemented from the gap to make the pressure consistent with the external atmospheric pressure. At the moment, under the action of negative pressure in the inner cavity of the handpiece, pollutants still enter the handpiece from a gap between the handpiece rear cover main body and the button to cause iatrogenic cross infection, and the phenomenon of back suction of the dental handpiece can not be effectively prevented, so that the back suction prevention high-speed pneumatic turbine dental handpiece is specially developed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a prevent high-speed pneumatic turbine dental handpiece of resorption, when dental handpiece closed, air inlet compressed air stops the air feed, but the high-speed rotation of wind wheel has inertia can continue to rotate, the rotational speed reduces gradually to stopping, change gradually the negative pressure in the wind wheel room, the air current cushion chamber can form the negative pressure, on the one hand, the inside air negative pressure after reducing dental handpiece stall with the air current cushion chamber intercommunication of handle, on the other hand, fan-shaped bearing seal outwards discharges the indoor air of heliciform blade bearing seal through its heliciform blade, offset partly outside air atmospheric pressure, thereby effectively prevent the resorption phenomenon of high-speed pneumatic turbine dental handpiece more, the pollutant that can effectively avoid the aircraft nose front end is inhaled the aircraft nose inside and causes iatrogenic source nature cross infection.
In order to achieve the above object, the technical solution of the present invention is: the utility model provides a prevent high-speed pneumatic turbine dental handpiece of resorption, includes the handle, the inside dabber of aircraft nose and aircraft nose, wind wheel, bearing, back lid, its wind wheel and bearing set up in the dabber, and the aircraft nose inner wall is equipped with inlet port, return air hole, its characterized in that: an annular groove is formed in the inner wall of the interior of the handpiece and provided with a resorption hole, the resorption hole enables the interior of the handpiece to be communicated with the interior of the handle, and further the resorption hole is smaller than the resorption hole;
the wind wheel structure is in a single-side open type, a baffle is arranged on the side, close to the front end of the machine head, of the wind wheel, gaps are formed among the baffle of the wind wheel, the bearing chamber and the end face of the bearing to form an airflow buffer cavity, and the airflow buffer cavity is communicated with the annular groove and the suck-back hole;
the bearing chamber inside the machine head is provided with a shaft seal chamber in the direction of the front end of the machine head, and a fan-shaped shaft seal is arranged in the shaft seal chamber and is arranged on the machine core shaft;
the fan-shaped shaft seal consists of a shaft sleeve seat and a shaft plate, and a plurality of spiral blades are arranged on the shaft plate;
and a gasket is arranged between the fan-shaped shaft seal and the bearing.
In order to achieve better implementation effect: a baffle is arranged on the other side of the wind wheel close to the front end side of the machine head;
the spiral blades are positioned on a shaft plate on one side of the shaft sleeve seat, the number of the spiral blades is 3-20, the spiral blades are arc-shaped convex strips, the protruding direction of the convex surface of each spiral blade is along the rotating direction of the mandrel, and the spiral blades are sequentially arranged from the center of the shaft sleeve seat to the outer periphery in a radiation mode;
the gasket is provided with a step at one side of the bearing.
The utility model has the advantages that: the utility model provides a prevent high-speed pneumatic turbine dental handpiece of resorption, the inside inner wall department of aircraft nose is equipped with annular groove and annular groove is equipped with the resorption hole, the resorption hole is with the inside and the inside intercommunication of handle of aircraft nose, when the dental handpiece is closed, the inside and air current cushion chamber intercommunication of handle, the air current flows back inside the aircraft nose from the inside of handle, thereby reduce the inside air negative pressure of aircraft nose after the dental handpiece stall, the inside bearing chamber of aircraft nose is located aircraft nose front end direction and is provided with the bearing seal room, be equipped with fan-shaped bearing seal in the bearing seal room and set up on the aircraft nose epaxially, fan-shaped bearing seal outwards discharges the air in the heliciform blade bearing seal room through its heliciform blade, offset a part outside air pressure, thereby effectively prevent the resorption phenomenon of high-speed pneumatic turbine dental handpiece more, can effectively avoid the pollutant of aircraft nose front end to be inhaled inside and cause the iatrogenic cross infection, through the high-speed pneumatic turbine dental .
Drawings
Fig. 1 is a schematic structural diagram 1 of the present invention;
fig. 2 is a schematic structural diagram 2 of the present invention;
FIG. 3 is a schematic view of a structure of the present invention;
FIG. 4 is a schematic structural view of the inner assembly of the center head of the present invention;
FIG. 5 is a schematic structural view of the fan-shaped shaft seal of the present invention;
fig. 6 is a schematic view of the overall structure of the present invention.
In the figure: 1-a handle; 2-machine head; 3-rear cover; 4-movement uranium; 5-wind wheel; 6-a bearing; 7-air inlet holes; 8-air return holes; 9-an annular groove; 10-suck back hole; 11-O-ring; 12-a wind wheel chamber; 13-a bearing chamber; 501-baffle plate; 14-an airflow buffer chamber; 15-a shaft seal chamber; 16-sector shaft seal; 1601-a shaft sleeve seat; 1602-axle plate; 1603-helical blades; 17-a gasket; 1701-step; 16031 — convex surface of helical blade; a-machine spindle rotation direction.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings, wherein the exemplary embodiments and the description are only for the purpose of illustrating the present invention, and are not to be construed as limiting the present invention.
Referring to fig. 1-6, the utility model discloses: the utility model provides a prevent high-speed pneumatic turbine dental handpiece of resorption, includes the handle, aircraft nose and aircraft nose inside dabber, wind wheel, bearing, lid behind the axle, this partial structure is the same with the existing dental handpiece commonly used in the market, need not carry out detailed structure description here, and its wind wheel and bearing set up in the dabber, and the aircraft nose inner wall is equipped with inlet port, return air hole, its main characterized in that: an annular groove is formed in the inner wall of the interior of the handpiece, a resorption hole is formed in the annular groove, the resorption hole enables the interior of the handpiece to be communicated with the interior of the handle, further, the resorption hole is smaller than the resorption hole, and the supply of resorption air when the dental handpiece stops is increased through the resorption hole, so that the negative pressure of the air in the handpiece after the dental handpiece stops rotating is reduced;
a wind wheel chamber is arranged in a handpiece, a wind wheel is arranged in the wind wheel chamber, a bearing chamber is arranged in the handpiece, a bearing is arranged in the bearing chamber, the bearing can be installed in the bearing chamber to isolate airflow, the wind wheel structure is in a unilateral open type, a baffle is arranged on the wind wheel close to the front end side of the handpiece, gaps are formed among the baffle of the wind wheel, the bearing chamber and the end surface of the bearing to form an airflow buffer cavity, and the airflow buffer cavity is communicated with an annular groove and a resorption hole;
its inside bearing chamber of aircraft nose is located the aircraft nose front end direction and is provided with the bearing seal room, be equipped with fan-shaped bearing seal in the bearing seal room and set up in the locomotive epaxial, fan-shaped bearing seal comprises axle sleeve seat and axletree, be provided with a plurality of heliciform blades on the axletree, the wind-force that produces under the quantity of above-mentioned flabellum and the range mode can satisfy and resist the suck-back pressure, reach an optimal operating mode parameter, fan-shaped bearing seal along with the high-speed rotatory while of locomotive axis, under the centrifugal action of heliciform blade, the air current in the aircraft nose shaft seal cavity is outwards discharged, reverse some outside air pressure of offsetting, be equipped with the gasket between its fan-shaped bearing seal and bearing, the gasket can.
In order to achieve better implementation effect: the other side of the wind wheel close to the front end side of the machine head is provided with a baffle plate;
the spiral blades are positioned on the shaft plate on one side of the shaft sleeve seat, the number of the spiral blades is 3-20, the spiral blades are arc-shaped convex strips, as shown in fig. 4-5, a is the rotation direction of the machine core shaft, the convex direction of the convex surface of the spiral blades is along the rotation direction of the machine core shaft, namely the convex direction of the convex surface of the spiral blades faces the rotation direction of the machine core shaft by a certain angle, the spiral blades can discharge air flow to the outside of the machine head (the front end direction of the dental handpiece), the spiral blades are formed by sequentially arranging the centers of the shaft sleeve seat to the periphery in a radiation mode, the number of the blades is selected according to the requirement of adjusting the air pressure, and as the preferred scheme of the application, the number of the blades is 10;
the gasket is provided with a step at one side of the bearing, and the step has better effects of isolating and blocking air flow.
The working principle is as follows: when the dental handpiece is closed, the air inlet compresses air to stop supplying air, but the wind wheel rotates at high speed with inertia and continues rotating, the rotating speed is gradually reduced to stop, the air flow buffer cavity gradually changes into negative pressure in the wind wheel cavity, on one hand (see the arrow signs of the air flow in the figures 1 and 3), the inner wall of the handpiece is provided with an annular groove, the annular groove is provided with a resorption hole, the resorption hole communicates the inside of the handpiece with the inside of the handle, when the dental handpiece is closed, the air flow of the resorption hole passes through the inside of the handle and then passes through the inside of the handle to the resorption hole, the air flow passes through the annular groove through the resorption hole and is supplemented to the whole air flow buffer cavity and the wind wheel cavity, thereby reducing the negative pressure of the air inside the handpiece after the dental handpiece stops rotating, the negative pressure of the handpiece after the dental handpiece stops is mainly reduced by the part, on the other hand, the fan-shaped shaft seal rotates along with, under the centrifugal action of the spiral blade, the airflow in the cavity of the shaft seal of the handpiece is discharged outwards (the direction of the front end of the dental handpiece), so that a part of external air pressure is counteracted reversely. Through the structure scheme, when the dental handpiece is closed, the negative pressure state of the inner part of the handpiece, which is positioned in the wind wheel chamber, is effectively reduced, after the negative pressure in the handpiece is reduced, the suction force of the inner part of the handpiece, which is sucked from the outer part of the handpiece, is reduced, the suck-back phenomenon is effectively prevented, and the air flow in the handpiece shaft seal cavity is discharged outwards (in the direction of the front end of the dental handpiece) through the fan-shaped shaft seal, so that the suck-back phenomenon of the most main air flow suck-back positions, such as the front end of the handpiece of the dental handpiece, the mounting gap between a needle and the handpiece, the mounting gap between a rear cover and the handpiece, and the like, is effectively prevented, the suck-back phenomenon of the high-speed pneumatic turbine dental handpiece is more effectively prevented, and the pollution at the front.
It should be noted that the rotation direction (a) of the spindle in this embodiment is only a schematic direction implemented in this embodiment, and if the spindle rotates in the opposite direction, that is, the wind wheel and the sector shaft seal rotate in the same opposite direction, the present invention is within the protection scope. All equivalent changes or modifications made according to the structure, characteristics and principles described in the claims of the present invention are included in the scope of the present invention.
Claims (6)
1. The utility model provides a prevent high-speed pneumatic turbine dental handpiece of resorption, includes the handle, the inside dabber of aircraft nose and aircraft nose, wind wheel, bearing, back lid, its wind wheel and bearing set up in the dabber, and the aircraft nose inner wall is equipped with inlet port, return air hole, its characterized in that: the inner wall department of aircraft nose inside is equipped with annular groove and annular groove is equipped with the resorption hole, the resorption hole is with the inside and the inside intercommunication of handle of aircraft nose, further, the resorption hole is less than the return air pocket.
2. The anti-suck back high speed pneumatic turbine dental handpiece of claim 1, wherein: the aircraft nose is inside to be equipped with the wind wheel in wind wheel room and the wind wheel room, the aircraft nose is inside to be equipped with bearing room and the bearing is indoor to be equipped with the bearing, the wind wheel leans on the aircraft nose front end side to be equipped with the baffle, it forms the air current cushion chamber to be equipped with the clearance between the baffle of wind wheel and bearing room and bearing terminal surface, air current cushion chamber and annular groove and resorption hole intercommunication.
3. The anti-suck back high speed pneumatic turbine dental handpiece of claim 1, wherein: the bearing chamber in the machine head is provided with a shaft seal chamber in the front end direction of the machine head, and a fan-shaped shaft seal is arranged in the shaft seal chamber and is arranged on the machine core shaft.
4. The anti-suck back high speed pneumatic turbine dental handpiece of claim 3, wherein: the fan-shaped shaft seal is composed of a shaft sleeve seat and a shaft plate, wherein a plurality of spiral blades are arranged on the shaft plate and are positioned on the shaft plate on one side of the shaft sleeve seat, the number of the spiral blades is 3-20, the spiral blades are arc-shaped convex strips, the protruding direction of the convex surface of each spiral blade is along the rotation direction of the machine core shaft, and the spiral blades are formed by sequentially arranging the centers of the shaft sleeve seat to the outer periphery in a radiation mode.
5. The anti-suck back high speed pneumatic turbine dental handpiece of claim 3, wherein: a gasket is arranged between the fan-shaped shaft seal and the bearing, and a step is arranged on one side, located on the bearing, of the gasket.
6. The anti-suck back high speed pneumatic turbine dental handpiece of claim 2, wherein: and a baffle is arranged on the other side of the wind wheel close to the front end side of the machine head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921307474.5U CN210784750U (en) | 2019-08-13 | 2019-08-13 | Anti-suck-back high-speed pneumatic turbine dental handpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921307474.5U CN210784750U (en) | 2019-08-13 | 2019-08-13 | Anti-suck-back high-speed pneumatic turbine dental handpiece |
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| Publication Number | Publication Date |
|---|---|
| CN210784750U true CN210784750U (en) | 2020-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921307474.5U Active CN210784750U (en) | 2019-08-13 | 2019-08-13 | Anti-suck-back high-speed pneumatic turbine dental handpiece |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110301989A (en) * | 2019-08-13 | 2019-10-08 | 广东精美医疗科技有限公司 | A kind of high speed air-driven turbine dental handpiece of anti-resorption |
| CN113349952A (en) * | 2021-07-21 | 2021-09-07 | 佛山市丹特尔医疗器材有限公司 | Anti-suck-back dental handpiece |
-
2019
- 2019-08-13 CN CN201921307474.5U patent/CN210784750U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110301989A (en) * | 2019-08-13 | 2019-10-08 | 广东精美医疗科技有限公司 | A kind of high speed air-driven turbine dental handpiece of anti-resorption |
| CN113349952A (en) * | 2021-07-21 | 2021-09-07 | 佛山市丹特尔医疗器材有限公司 | Anti-suck-back dental handpiece |
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Address after: No. 301, 401, 501, Building 3, Wanyang Kexing Park, No. 84 Taoyuan East Road, Shishan Town, Nanhai District, Foshan City, Guangdong Province 528000 Patentee after: GUANGDONG JINME MEDICAL TECHNOLOGY CO.,LTD. Country or region after: China Address before: 528225 workshop 2, floor 1, block 15, Langsha, Luocun, Shishan town, Nanhai District, Foshan City, Guangdong Province Patentee before: GUANGDONG JINME MEDICAL TECHNOLOGY CO.,LTD. Country or region before: China |