CN212037787U - Dental handpiece - Google Patents
Dental handpiece Download PDFInfo
- Publication number
- CN212037787U CN212037787U CN202020015954.0U CN202020015954U CN212037787U CN 212037787 U CN212037787 U CN 212037787U CN 202020015954 U CN202020015954 U CN 202020015954U CN 212037787 U CN212037787 U CN 212037787U
- Authority
- CN
- China
- Prior art keywords
- flow channel
- liquid
- channel
- liquid flow
- dental handpiece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
The utility model discloses a dental handpiece, which comprises a cavity, be equipped with actuating mechanism and car needle in the cavity, actuating mechanism is used for driving the car needle and rotates, the bottom of cavity is equipped with the installation pit, dodge the hole in the middle part of installation pit is equipped with, installation pit department is equipped with out the basin fixedly, the middle part of going out the basin is equipped with the hole of dodging outward, the car needle dodges the hole in and dodges the hole outward and wear out in the cavity, it is equipped with a plurality of liquid flow passageway and a plurality of airflow channel to go out the basin, the cavity is equipped with inlet channel and inlet channel, inlet channel's output and liquid flow channel input intercommunication, inlet channel's output and airflow channel's input intercommunication, liquid flow channel sets up side by side with airflow channel, airflow channel's gas outlet is located the liquid outlet outside of liquid flow channel. Even if the air pressure in the air flow channel is higher than the water pressure in the liquid flow channel, the liquid flow channel can still be ensured to normally discharge liquid.
Description
Technical Field
The utility model relates to a dental handpiece.
Background
The dental handpiece is a tool for grinding and drilling the teeth of a patient, and for example, the Chinese patent CN208274635U is a dental handpiece which can be used for grinding tartar, decayed teeth and bad teeth, wherein a 'lathe needle' is a part for grinding teeth. The 'lathe needle' rotates at a high speed in the working process to grind teeth, a large amount of heat is generated by friction of the 'lathe needle' and the teeth, water needs to be added to the friction part to cool, and therefore the dental handpiece is provided with a plurality of liquid spraying holes near the 'lathe needle'. The dental handpiece is internally provided with an air flow channel and a liquid flow channel, and high-pressure air in the air flow channel and water in the liquid flow channel are sprayed out of the liquid spraying holes together so that the sprayed water is in a mist shape, and can be more uniformly covered on the friction part, thereby better cooling the friction part.
However, in the prior art, the output ends of the gas flow channel and the liquid flow channel are connected to the input ends of the liquid spraying holes, so that when the gas pressure in the gas flow channel is higher than the water pressure in the liquid flow channel, the high-pressure gas pushes the water along the liquid flow channel in the opposite direction, and the liquid spraying hole or holes cannot spray the liquid normally.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims to provide a dental handpiece, which can still ensure that the liquid flow channel can normally discharge liquid even if the air pressure in the air flow channel is higher than the water pressure in the liquid flow channel.
The purpose of the utility model is realized by adopting the following technical scheme:
the dental handpiece comprises a cavity, a driving mechanism and a needle are arranged in the cavity, the driving mechanism is used for driving the needle to rotate, the bottom of the cavity is provided with an installation pit, the middle part of the installation pit is provided with an inner avoidance hole, the installation pit is fixedly provided with a water outlet tray, the middle part of the water outlet disc is provided with an outer avoidance hole, the machine needle penetrates out of the cavity through the inner avoidance hole and the outer avoidance hole, the water outlet tray is provided with a plurality of liquid flow channels and a plurality of air flow channels, the cavity is provided with a liquid inlet channel and an air inlet channel, the output end of the liquid inlet channel is communicated with the input end of the liquid flow channel, the output end of the air inlet channel is communicated with the input end of the air flow channel, the liquid flow channel and the airflow channel are arranged in parallel, the air outlet of the airflow channel is positioned outside the liquid outlet of the liquid flow channel, and the airflow channel is gradually and obliquely arranged inwards along the airflow direction.
Specifically, a liquid inlet distribution ring groove is formed in the top wall of the mounting pit, a liquid inlet distribution ring cavity is formed by the liquid inlet distribution ring groove and the top wall of the water outlet tray, and the output end of the liquid inlet channel and the input end of each liquid channel are communicated with the liquid inlet distribution ring cavity.
Specifically, the lateral wall of the water outlet tray is provided with an air inlet distribution ring groove, the air inlet distribution ring groove and the inner side wall of the mounting pit form an air inlet distribution ring-shaped cavity, and the output end of the air inlet channel and the input end of each air flow channel are communicated with the air inlet distribution ring-shaped cavity.
Specifically, dental handpiece includes lock nut, lock nut is the tube-shape, lock nut's lateral wall is equipped with the screw thread, lock nut's bottom is equipped with the outward flange, the lower extreme of dodging the hole outward is the counter bore, the outward flange with the counter bore adaptation, dodge the hole outward lock nut, lock nut's inside wall is dodged the car needle, lock nut's upper segment with in dodge hole threaded connection.
Specifically, the liquid flow channels are arranged along the central axis of the water outlet disc, the liquid flow channels are uniformly distributed around the central axis of the water outlet disc, each air flow channel is matched with one liquid flow channel, and the extension line of the central axis of each air flow channel is intersected with the central axis of the water outlet disc.
Specifically, the water outlet tray is provided with 3-6 liquid flow channels.
Specifically, the edge of the gas outlet of the gas flow channel is intersected with the edge of the liquid outlet of the liquid flow channel, so that the gas outlet of the gas flow channel and the liquid outlet of the liquid flow channel are in an 8-shaped outline, the included angle formed by the central axis of the gas flow channel and the central axis of the liquid flow channel is a, and a is more than or equal to 15 degrees and less than or equal to 45 degrees.
Specifically, the included angle formed by the central axis of the gas flow channel and the central axis of the liquid flow channel is a, and a is more than or equal to 25 degrees and less than or equal to 35 degrees.
Specifically, dental handpiece includes the handle, the end of handle is equipped with the external tapping of admitting air and feed liquor external tapping, admit air the external tapping with inlet channel passes through the pipeline intercommunication, the feed liquor external tapping with inlet channel passes through the pipeline intercommunication.
Specifically, the driving mechanism is a wind wheel, and the needle is fixedly arranged in the wind wheel in a penetrating mode.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the water outlet tray is provided with a liquid flow channel and an air flow channel which are independent from each other, the liquid flow channel and the air flow channel are arranged in parallel, an air outlet of the air flow channel is positioned outside a liquid outlet of the liquid flow channel, the air flow channel is inclined inwards gradually along the air flow direction, so that the liquid (such as purified water) for cooling flows out through the liquid flow channel, high-pressure gas is sprayed out through the air flow channel, the flowing-out liquid is blown away by the high-pressure gas to form fog, and the high-pressure gas is sprayed out obliquely inwards from outside to spray out to spray the atomized liquid to the friction position of the needle and the teeth of a patient, so that the friction position. Because the liquid flow channel and the gas flow channel are mutually independent, even if the air pressure in the air inlet channel communicated with the gas flow channel is too high (higher than the liquid pressure in the liquid inlet channel), the gas in the air inlet channel cannot enter the liquid inlet channel through the liquid flow channel, so that the liquid in the liquid flow channel cannot be reversely pushed and pressed, and the liquid can be normally discharged from the liquid flow channel.
Drawings
FIG. 1 is a perspective view of a dental handpiece;
FIG. 2 is a partial exploded view of the dental handpiece;
FIG. 3 is a half-sectional view of the water outlet tray;
FIG. 4 is a half-sectional view of the water outlet tray;
FIG. 5 is a partial cutaway view of the dental handpiece;
FIG. 6 is a partial cutaway view of the dental handpiece;
FIG. 7 is a partial cutaway view of the dental handpiece;
figure 8 is a partial cutaway view of a dental handpiece.
In the figure: 1. a cavity; 11. installing a pit; 12. an inner avoidance hole; 13. a liquid inlet distribution ring groove; 14. a liquid inlet distribution annular cavity; 21. a drive mechanism; 22. needle turning; 3. a water outlet tray; 31. an outer avoiding hole; 32. a flow channel; 33. an air flow channel; 34. an air inlet distribution ring groove; 35. an inlet distribution annulus; 36. a counter bore; 4. a liquid inlet channel; 5. an air intake passage; 6. locking the nut; 61. an outer flange; 7. a handle; 71. an air inlet external interface; 72. liquid inlet external interface; 8. a connector.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.
Referring to fig. 1, 2, 7 and 8, the dental handpiece comprises a cavity 1, and a driving mechanism 21 and a needle 22 are arranged in the cavity 1. The driving mechanism 21 is used for driving the needle 22 to rotate. The bottom of cavity 1 is equipped with installation pit 11, and the middle part of installation pit 11 is equipped with interior dodge hole 12. The water outlet disc 3 is fixedly arranged at the mounting pit 11, the outer avoidance hole 31 is arranged in the middle of the water outlet disc 3, and the lathe needle 22 penetrates out of the cavity 1 through the inner avoidance hole 12 and the outer avoidance hole 31.
With reference to fig. 2 to 4, the outlet tray 3 is provided with a plurality of liquid flow channels 32 and a plurality of air flow channels 33. The flow channel 32 is arranged in parallel with the flow channel 33, the outlet of the flow channel 33 is located outside the outlet of the flow channel 32, and the flow channel 33 is arranged to be gradually inclined inward in the gas flow direction. Referring to fig. 2, 5 and 6, the cavity 1 is provided with a liquid inlet channel 4 and a gas inlet channel 5, and an output end of the liquid inlet channel 4 is communicated with an input end of the liquid flow channel 32. The output end of the intake passage 5 communicates with the input end of the airflow passage 33. Specifically, the top wall of the installation pit 11 is provided with a liquid inlet distribution ring groove 13, the liquid inlet distribution ring groove 13 and the top wall of the water outlet tray 3 form a liquid inlet distribution ring cavity 14 (see fig. 5), and the output end of the liquid inlet channel 4 and the input end of each liquid flow channel 32 are communicated with the liquid inlet distribution ring cavity 14. The side wall of the water outlet tray 3 is provided with an air inlet distribution ring groove 34, the air inlet distribution ring groove 34 and the inner side wall of the mounting pit 11 form an air inlet distribution ring-shaped cavity 35, and the output end of the air inlet channel 5 and the input end of each air flow channel 33 are communicated with the air inlet distribution ring-shaped cavity 35. As an alternative embodiment, the inlet distribution ring groove 13 is provided on the top wall of the outlet tray 3 instead of the top wall of the mounting recess 11, and similarly, the inlet distribution ring groove 34 is provided on the inner side wall of the mounting recess 11 instead of the side wall of the outlet tray 3.
The water outlet tray 3 is provided with a liquid flow channel 32 and an air flow channel 33 which are independent from each other, the liquid flow channel 32 and the air flow channel 33 are arranged in parallel, an air outlet of the air flow channel 33 is positioned outside an liquid outlet of the liquid flow channel 32, the air flow channel 33 is gradually and obliquely arranged inwards along the air flow direction, the arrangement is such that liquid (such as purified water) for cooling flows out through the liquid flow channel 32, high-pressure gas is sprayed out through the air flow channel 33, the liquid flowing out is blown by the high-pressure gas to form mist, and the high-pressure gas is sprayed out obliquely from outside to inside to spray the atomized liquid to the friction position of the needle 22 and the teeth of the patient, so that the friction position is. Since the liquid flow path 32 and the gas flow path 33 are independent from each other, even if the gas pressure in the gas inlet path 5 communicating with the gas flow path 33 is too high (higher than the liquid pressure in the liquid inlet path 4), the gas in the gas inlet path 5 does not enter the liquid inlet path 4 through the liquid flow path 32, and thus the liquid in the liquid flow path 32 is not pushed in the reverse direction, and the liquid can be discharged from the liquid flow path 32 normally.
Specifically, the liquid flow channels 32 are arranged along the central axis of the water outlet tray 3, the liquid flow channels 32 are uniformly distributed around the central axis of the water outlet tray 3, each air flow channel 33 is matched with one liquid flow channel 32, and the extension line of the central axis of the air flow channel 33 is intersected with the central axis of the water outlet tray 3. Specifically, the edge of the air outlet of the air flow channel 33 intersects with the edge of the liquid outlet of the liquid flow channel 32, so that the air outlet of the air flow channel 33 and the liquid outlet of the liquid flow channel 32 are in a 8-shaped outline, the included angle formed by the central axis of the air flow channel 33 and the central axis of the liquid flow channel 32 is a, a is more than or equal to 15 degrees and less than or equal to 45 degrees, preferably, a is more than or equal to 25 degrees and less than or equal to 35 degrees, in this embodiment, a is more than 28 degrees, so that the atomized liquid blown by the high-pressure gas can fall more intensively on the friction position between the needle 22 and the teeth of the patient, and thus the atomized.
In particular, the outlet tray 3 is provided with 3-6 flow channels 32, so that the outlet of the outlet tray 3 is more uniform along the circumferential direction.
Specifically, the dental handpiece includes lock nut 6, and lock nut 6 is the tube-shape, and the lateral wall of lock nut 6 is equipped with the screw thread, and the bottom of lock nut 6 is equipped with outward flange 61. The lower end of the outer relief hole 31 is a counterbore 36, and an outer flange 61 is fitted into the counterbore 36. The outer avoidance hole 31 is avoided from the lock nut 6, and the inner side wall of the lock nut 6 is avoided from the needle 22. The upper section of the locking nut 6 is in threaded connection with the inner avoiding hole 12, so that the water outlet disc 3 is firmly locked at the mounting pit 11.
Specifically, the dental handpiece comprises a handle 7, and the handle 7 is fixedly connected with the cavity 1 through a connecting body 8. The tail end of the handle 7 is provided with an air inlet external interface 71 and a liquid inlet external interface 72. The air inlet external interface 71 is communicated with the air inlet channel 5 through a pipeline, the air inlet external interface 71 is externally connected with high-pressure gas, the liquid inlet external interface 72 is communicated with the liquid inlet channel 4 through a pipeline, and the liquid inlet external interface 72 is externally connected with purified water.
Specifically, the driving mechanism 21 is a wind wheel, and the needle 22 is fixedly inserted into the wind wheel. The principle of driving the needle 22 by the wind wheel and the specific connection relationship thereof can be referred to chinese patent CN 203208133U. It should be noted that the driving mechanism 21 may also be other pneumatic or electric rotation driving mechanisms, such as an electric motor, a pneumatic motor, etc.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.
Claims (10)
1. Dental handpiece, its characterized in that: comprises a cavity, a driving mechanism and a needle are arranged in the cavity, the driving mechanism is used for driving the needle to rotate, the bottom of the cavity is provided with an installation pit, the middle part of the installation pit is provided with an inner avoidance hole, the installation pit is fixedly provided with a water outlet tray, the middle part of the water outlet disc is provided with an outer avoidance hole, the machine needle penetrates out of the cavity through the inner avoidance hole and the outer avoidance hole, the water outlet tray is provided with a plurality of liquid flow channels and a plurality of air flow channels, the cavity is provided with a liquid inlet channel and an air inlet channel, the output end of the liquid inlet channel is communicated with the input end of the liquid flow channel, the output end of the air inlet channel is communicated with the input end of the air flow channel, the liquid flow channel and the airflow channel are arranged in parallel, the air outlet of the airflow channel is positioned outside the liquid outlet of the liquid flow channel, and the airflow channel is gradually and obliquely arranged inwards along the airflow direction.
2. The dental handpiece of claim 1, wherein: the top wall of the mounting pit is provided with a liquid inlet distribution ring groove, the liquid inlet distribution ring groove and the top wall of the water outlet tray form a liquid inlet distribution ring-shaped cavity, and the output end of the liquid inlet channel and the input end of each liquid channel are communicated with the liquid inlet distribution ring-shaped cavity.
3. The dental handpiece of claim 1, wherein: the lateral wall of the water outlet tray is provided with an air inlet distribution ring groove, the air inlet distribution ring groove and the inner side wall of the installation pit form an air inlet distribution ring-shaped cavity, and the output end of the air inlet channel and the input end of each air flow channel are communicated with the air inlet distribution ring-shaped cavity.
4. The dental handpiece of claim 1, wherein: the dental handpiece includes lock nut, lock nut is the tube-shape, lock nut's lateral wall is equipped with the screw thread, lock nut's bottom is equipped with the outward flange, the lower extreme of dodging the hole outward is the counter bore, the outward flange with the counter bore adaptation, dodge the hole outward lock nut, lock nut's inside wall is dodged the car needle, lock nut's upper segment with in dodge hole threaded connection.
5. The dental handpiece of claim 1, wherein: the liquid flow channels are arranged along the central axis of the water outlet disc, the liquid flow channels are uniformly distributed around the central axis of the water outlet disc, each air flow channel is matched with one liquid flow channel, and the extension line of the central axis of each air flow channel is intersected with the central axis of the water outlet disc.
6. The dental handpiece of claim 5, wherein: the water outlet tray is provided with 3-6 liquid flow channels.
7. The dental handpiece of claim 5, wherein: the edge of the gas outlet of the gas flow channel is intersected with the edge of the liquid outlet of the liquid flow channel, so that the gas outlet of the gas flow channel and the liquid outlet of the liquid flow channel are in an 8-shaped outline, the included angle formed by the central axis of the gas flow channel and the central axis of the liquid flow channel is a, and a is more than or equal to 15 degrees and less than or equal to 45 degrees.
8. The dental handpiece of claim 7, wherein: the included angle formed by the central axis of the air flow channel and the central axis of the liquid flow channel is a, and a is more than or equal to 25 degrees and less than or equal to 35 degrees.
9. The dental handpiece of claim 1, wherein: the dental handpiece includes the handle, the end of handle is equipped with the air inlet external tapping and feed liquor external tapping, the air inlet external tapping with air inlet channel passes through the pipeline intercommunication, the feed liquor external tapping with feed liquor channel passes through the pipeline intercommunication.
10. The dental handpiece of claim 1, wherein: the driving mechanism is a wind wheel, and the machine needle is fixedly arranged on the wind wheel in a penetrating mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020015954.0U CN212037787U (en) | 2020-01-03 | 2020-01-03 | Dental handpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020015954.0U CN212037787U (en) | 2020-01-03 | 2020-01-03 | Dental handpiece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212037787U true CN212037787U (en) | 2020-12-01 |
Family
ID=73536371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020015954.0U Active CN212037787U (en) | 2020-01-03 | 2020-01-03 | Dental handpiece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212037787U (en) |
-
2020
- 2020-01-03 CN CN202020015954.0U patent/CN212037787U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6742725B1 (en) | Multi-nozzle showerhead | |
| US4217101A (en) | Dental handpiece | |
| US6695072B2 (en) | Hand-held pneumatic rotary drive device having an adjustable air exhaust | |
| US6676374B2 (en) | Air-driven rotating and cutting device for use in medical and dental procedures | |
| MXPA05000357A (en) | Fluid delivery tube structural body. | |
| JP2012520777A (en) | Modular drill | |
| WO2001056749A2 (en) | Hand-held pneumatic rotary drive device having an adjustable air exhaust | |
| CN102048588B (en) | Air-driven rotary cutting tool | |
| US5334013A (en) | High speed dental drill with positive pressure air drive | |
| US5252065A (en) | Cartridge type dental handpiece | |
| US20200086336A1 (en) | Spinning showerhead | |
| CN212037787U (en) | Dental handpiece | |
| US7290426B2 (en) | Device for lubricating and cooling molds, in particular forging dies and tools in metal forming | |
| USRE30340E (en) | Dental handpiece | |
| US4353697A (en) | Dental handpiece and a connecting means thereof | |
| US6315560B1 (en) | High-speed dental drill | |
| US5881999A (en) | Water shutoff valve assembly | |
| TWM569806U (en) | Pneumatic tool with air guiding structure | |
| US3411210A (en) | Air driven turbines for dental handpieces and the like | |
| CN108097485A (en) | Main shaft ring-type water injector | |
| TW202006274A (en) | Pneumatic tool with air guiding structure including an air intake unit, a head housing portion, a cylinder and a steering valve assembly, and capable of reducing the machining accuracy and the cost of the cylinder | |
| CN109261384A (en) | High-pressure water spinning sprinkler head with axial thrust homeostasis function | |
| CN207981462U (en) | Main shaft ring-type water injector | |
| CN208697285U (en) | Pneumatic impact spanner | |
| US20040053192A1 (en) | Handle or angled member for dental tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |