CN113007280A - Speed-increasing dental hand bender - Google Patents
Speed-increasing dental hand bender Download PDFInfo
- Publication number
- CN113007280A CN113007280A CN202110203767.4A CN202110203767A CN113007280A CN 113007280 A CN113007280 A CN 113007280A CN 202110203767 A CN202110203767 A CN 202110203767A CN 113007280 A CN113007280 A CN 113007280A
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- Prior art keywords
- shaft
- gear
- transmission
- output shaft
- speed increasing
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
- F16H1/20—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members
- F16H1/203—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members with non-parallel axes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
- A61C1/08—Machine parts specially adapted for dentistry
- A61C1/18—Flexible shafts; Clutches or the like; Bearings or lubricating arrangements; Drives or transmissions
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
- A61C1/08—Machine parts specially adapted for dentistry
- A61C1/18—Flexible shafts; Clutches or the like; Bearings or lubricating arrangements; Drives or transmissions
- A61C1/185—Drives or transmissions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H2057/02039—Gearboxes for particular applications
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Epidemiology (AREA)
- Dentistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Gear Transmission (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
The invention relates to an acceleration dental hand bender, which comprises a shell, wherein an acceleration device is arranged on the inner side of the rear part of the shell, the acceleration device comprises an input shaft and an output shaft, the input shaft and the output shaft are in transmission fit through a parallel shaft gear, the rear end of the input shaft is used for connecting a motor output shaft, a transmission shaft positioned in front of the output shaft is arranged on the inner side of the neck part of the shell, the rear end of the transmission shaft is in transmission fit with the front end of the output shaft through a crossed shaft gear or is connected through a flexible coupling, and the transmission ratio of the crossed shaft gear transmission is close to or equal to 1; the gear train of the dental hand bender has low working noise and long service life.
Description
Technical Field
The invention relates to the technical field of oral medical equipment, in particular to a speed-increasing dental curved handpiece.
Background
The dental bender is used for the root canal therapy operation, and common acceleration rate dental bender includes casing 1 on the market, the inboard of 1 rear portion 10 of casing is equipped with speed increase gear 12, speed increase gear 12 is including input, play axle 13, 14, the front end of input shaft 13 is equipped with dish tooth 20, the rear end of output shaft 14 is equipped with and meshes driven cylinder helical gear 21 with dish tooth 20, the rear end of input shaft 13 is used for connecting the motor output shaft, the inboard of 1 head 8 of casing is equipped with the rotatory chuck 19 that is located the place ahead of output shaft 14, rotatory chuck 19 is the column and supports rotatoryly through the bearing, rotatory chuck 19 passes through 90 crossing bevel gear drive cooperation with the front end of output shaft 14, the bottom of rotatory chuck 19 is used for the centre gripping working head.
The common speed-increasing dental elbow machine on the market has the following problems: the disc teeth 20 and the cylindrical helical gears 21 are in meshing transmission to form crossed angle disc tooth transmission, the structural design of the crossed angle disc tooth transmission is constrained by the inner space of the shell, the number of the disc teeth 20 is greater than that of the cylindrical helical gears 21 to realize speed-up transmission, and the thickness of the disc teeth 20 with multiple teeth is thinner, so that the phenomenon of tooth breakage is easily caused when the disc teeth 20 are subjected to a large load; the disc teeth 20 are generally processed by a profiling method, the gear precision of the processed disc teeth is not high, and the disc teeth 20 and the cylindrical helical gear 21 have large relative sliding between the working surfaces due to a large speed increasing ratio in the high-speed transmission process, so that the gear is easy to wear, the transmission noise is increased, and the service life of the gear is low.
Disclosure of Invention
The invention aims to solve the technical problem that the gear train of the speed-increasing dental handpiece has low working noise and long service life.
In order to solve the technical problem, the invention provides an acceleration dental bending handpiece which comprises a shell, wherein an acceleration device is arranged on the inner side of the rear part of the shell, the acceleration device comprises an input shaft and an output shaft, the input shaft and the output shaft are in transmission fit through parallel shaft gears, the rear end of the input shaft is used for being connected with an output shaft of a motor, a transmission shaft positioned in front of the output shaft is arranged on the inner side of the neck part of the shell, the rear end of the transmission shaft is in transmission fit with the front end of the output shaft through a crossed shaft gear or is connected through a flexible coupling, and the transmission ratio of the crossed shaft gear transmission is close to or equal to 1.
Further, the parallel shaft gear transmission is parallel shaft cylindrical straight gear transmission; the spur gear can be processed by a generating method, the processed gear has high precision, low cost and low noise during transmission, the tooth thickness of the spur gear is relatively thick, and the phenomenon of tooth breakage is not easy to generate when the load is large.
Further, the parallel shaft gear transmission is a planetary gear transmission.
Further, a cylindrical straight gear is sleeved on the input shaft, the output shaft is a cylindrical straight gear shaft, and the cylindrical straight gear is in meshing transmission with the cylindrical straight gear shaft; the cylindrical straight gear and the cylindrical straight gear shaft can be processed by a generating method, the processed gear has high precision and low cost, the noise is low during transmission, the tooth thickness of the cylindrical straight gear and the cylindrical straight gear shaft is relatively thick, and the phenomenon of tooth breakage is not easy to generate when the load is large.
Further, the intersecting axis gear drive is an intersecting cylindrical helical gear drive.
Furthermore, a first cylindrical helical gear is arranged at the rear end of the transmission shaft, and a second cylindrical helical gear in meshing transmission with the first cylindrical helical gear is arranged at the front end of the output shaft; the first cylindrical helical gear and the second cylindrical helical gear are in meshing transmission to form intersecting cylindrical helical gear transmission, and the transmission ratio of the intersecting shaft gear transmission is close to or equal to 1, so that a speed increasing ratio or a speed reducing ratio hardly exists between the first cylindrical helical gear and the second cylindrical helical gear, the relative sliding between working surfaces of the two gears is small, the tooth surface abrasion is less, and the noise is low; because there is almost no speed increasing ratio or speed reducing ratio between the first cylindrical helical gear and the second cylindrical helical gear, the number of teeth of the two gears can be designed to be less, and the tooth thickness and the tooth width can be designed to be thicker, so that the strength of the gears is improved, and the phenomenon of tooth breakage in the transmission process is effectively avoided.
Further, a rotary chuck located in front of the transmission shaft is arranged on the inner side of the head of the shell, the rotary chuck is columnar and supported to rotate through a bearing, the rotary chuck is in transmission fit with the front end of the transmission shaft through 90-degree crossed bevel gears or crown gears, and the bottom end of the rotary chuck is used for clamping the working head.
Further, the flexible coupling is a universal joint cross coupling.
Further, the input shaft, the output shaft and the transmission shaft are supported for rotation by bearings.
The invention has the beneficial effects that: all the gears forming the parallel shaft gear transmission can be processed by adopting a generating method, the processed gears are high in precision and low in cost, the noise is low during transmission, and the tooth thickness of each gear is not restricted by the internal space of the shell, so that the tooth thickness of each gear can be designed to be thicker to improve the gear strength, and the high-strength gears are not easy to generate the tooth breakage phenomenon when being subjected to a large load; the transmission ratio of the transmission of the intersecting shaft gear is close to or equal to 1, so that a speed increasing ratio or a speed reducing ratio hardly exists between the driving gear and the driven gear which form the transmission of the intersecting shaft gear, and the relative sliding between the working surfaces of the driving gear and the driven gear is small, the tooth surface abrasion is less, and the noise is low; because the transmission ratio of the intersecting shaft gear transmission is close to or equal to 1, the number of teeth of a driving gear and a driven gear which form the intersecting shaft gear transmission can be designed to be less, the tooth thickness and the tooth width can be designed to be thicker, so that the gear strength is improved, and the tooth breakage phenomenon is not easy to occur in the transmission process; therefore, the gear train of the speed-increasing dental handpiece has low working noise and long service life.
Drawings
In order to clearly illustrate the innovative principles of the invention and its technical advantages compared to the existing bending phones, a possible embodiment is illustrated below by way of non-limiting example applying said principles, with the aid of the accompanying drawings. In the figure:
FIG. 1 is a schematic view of a speed-increasing dental handpiece according to an embodiment of the present invention;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is a front view of the housing;
fig. 4 is a schematic view of a commercially available speed-increasing dental bender.
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.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Example 1
As shown in fig. 1-3, an acceleration rate dental handpiece includes a housing 1, the inboard at casing 1 rear portion 10 is equipped with accelerator 2, accelerator 2 includes input, play axle 3, 4, through parallel shaft gear drive cooperation between input, play axle 3, 4, the rear end of input shaft 3 is used for connecting the motor output shaft, the inboard of casing 1 neck 5 is equipped with the transmission shaft 6 that is located the place ahead of output shaft 4, through crossing shaft gear drive cooperation between the rear end of transmission shaft 6 and the front end of output shaft 4, or through flexible coupling connection, crossing shaft gear drive's drive ratio is close to or equals 1.
Preferably, the parallel shaft gear transmission is a parallel shaft spur gear transmission; the parallel shaft gear transmission is also parallel shaft herringbone gear transmission, planetary gear transmission or parallel shaft helical gear transmission.
The input shaft 3 is sleeved with a cylindrical straight gear 7, the output shaft 4 is a cylindrical straight gear shaft, and the cylindrical straight gear 7 is in meshing transmission with the cylindrical straight gear shaft.
Preferably, the intersecting axis gear drive is an intersecting cylindrical helical gear drive; the intersecting shaft gear transmission can also be an intersecting straight bevel gear transmission, an intersecting helical bevel gear transmission or an intersecting curved bevel gear transmission.
Preferably, the rear end of the transmission shaft 6 is provided with a first cylindrical helical gear 30, and the front end of the output shaft 4 is provided with a second cylindrical helical gear 31 which is engaged with the first cylindrical helical gear 30 for transmission.
The inside of the head 8 of the shell 1 is provided with a rotary chuck 9 positioned in front of the transmission shaft 6, the rotary chuck 9 is columnar and is supported by a bearing to rotate, the front ends of the rotary chuck 9 and the transmission shaft 6 are in transmission fit through 90-degree crossed bevel gears or crown gears, and the bottom end of the rotary chuck 9 is used for clamping a working head.
The flexible coupling is a cross-axle type universal coupling; the flexible coupling can also be a crowned tooth coupling, an Oldham coupling, an elastomeric pin coupling, or an elastomeric sleeve pin coupling.
The input and output shafts 3, 4 and the transmission shaft 6 are supported for rotation by bearings.
The profiling method is a processing method for directly cutting off tooth grooves on a machine tool to process tooth profiles by utilizing a forming cutter with the same tooth profile curve, a disc-shaped or finger-shaped milling cutter is usually used on a common milling machine, a dividing head is used for processing, the tooth milling is processed tooth by tooth, after one tooth groove is milled, the dividing head needs to be rotated to rotate a tooth blank by one tooth, the production efficiency is low, the accumulated error of division is large, the precision of the processed gear is not high, and therefore, the tooth milling processing is mainly used for single-piece repairing and matching.
The generating method is a method for processing a gear by using the meshing principle of the gear, and common processing methods include hobbing, gear shaping, gear shaving, gear honing, gear grinding and the like. The gear hob is a rack-shaped cutter, the shape of the tooth profile of the shaft plane of the gear hob is the same as that of the rack, the gear hob and the processed tooth blank are in meshing transmission of the gear and the rack, and the hob is fed along the axial direction of the tooth blank, so that the tooth profile is cut. The generating method for processing the gear by the gear hobbing machine has high gear processing precision and production efficiency, and is mainly used for batch and mass production.
All the gears forming the parallel shaft gear transmission can be processed by adopting a generating method, the processed gears are high in precision and low in cost, the noise is low during transmission, and the tooth thickness of each gear is not restricted by the internal space of the shell, so that the tooth thickness of each gear can be designed to be thicker to improve the gear strength, and the high-strength gears are not easy to generate the tooth breakage phenomenon when being subjected to a large load; the transmission ratio of the transmission of the intersecting shaft gear is close to or equal to 1, so that a speed increasing ratio or a speed reducing ratio hardly exists between the driving gear and the driven gear which form the transmission of the intersecting shaft gear, and the relative sliding between the working surfaces of the driving gear and the driven gear is small, the tooth surface abrasion is less, and the noise is low; because the transmission ratio of the intersecting shaft gear transmission is close to or equal to 1, the number of teeth of a driving gear and a driven gear which form the intersecting shaft gear transmission can be designed to be less, the tooth thickness and the tooth width can be designed to be thicker, so that the gear strength is improved, and the tooth breakage phenomenon is not easy to occur in the transmission process; therefore, the gear train of the speed-increasing dental handpiece has low working noise and long service life.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. The utility model provides an acceleration rate dental handpiece, includes casing (1), its characterized in that: the inboard of casing (1) rear portion (10) is equipped with speed increase gear (2), speed increase gear (2) are including input, play axle (3, 4), through parallel shaft gear drive cooperation between input, play axle (3, 4), the rear end of input shaft (3) is used for connecting the motor output shaft, the inboard of casing (1) neck (5) is equipped with transmission shaft (6) that are located the place ahead of output shaft (4), through intersecting shaft gear drive cooperation between the rear end of transmission shaft (6) and the front end of output shaft (4), or through flexible coupling connection, intersecting shaft gear drive's drive ratio is close to or equals 1.
2. The speed increasing dental bur of claim 1, wherein: the parallel shaft gear transmission is parallel shaft cylindrical straight gear transmission.
3. The speed increasing dental bur of claim 1, wherein: the parallel shaft gear transmission is a planetary gear transmission.
4. The speed increasing dental bur of claim 1, wherein: the cylindrical straight gear (7) is sleeved on the input shaft (3), the output shaft (4) is a cylindrical straight gear shaft, and the cylindrical straight gear (7) is in meshing transmission with the cylindrical straight gear shaft.
5. The speed increasing dental bur of claim 1, wherein: the intersecting axis gear drive is an intersecting cylindrical helical gear drive.
6. The speed increasing dental bur of claim 1, wherein: the rear end of the transmission shaft (6) is provided with a first cylindrical helical gear (30), and the front end of the output shaft (4) is provided with a second cylindrical helical gear (31) which is in meshing transmission with the first cylindrical helical gear (30).
7. The speed increasing dental bur of claim 1, wherein: the inside of casing (1) head (8) is equipped with rotatory chuck (9) that are located the place ahead of transmission shaft (6), rotatory chuck (9) are the column and support rotatoryly through the bearing, rotatory chuck (9) and the front end of transmission shaft (6) are through the transmission cooperation of 90 crossing bevel gears or crown gear transmission cooperation, the bottom of rotatory chuck (9) is used for the centre gripping work head.
8. The speed increasing dental bur of claim 1, wherein: the flexible coupling is a cross-pin universal coupling.
9. A speed increasing dental bur according to any one of claims 1 to 8, wherein: the input shaft, the output shaft (3, 4) and the transmission shaft (6) are supported by bearings to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110203767.4A CN113007280A (en) | 2021-02-23 | 2021-02-23 | Speed-increasing dental hand bender |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110203767.4A CN113007280A (en) | 2021-02-23 | 2021-02-23 | Speed-increasing dental hand bender |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113007280A true CN113007280A (en) | 2021-06-22 |
Family
ID=76408497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110203767.4A Pending CN113007280A (en) | 2021-02-23 | 2021-02-23 | Speed-increasing dental hand bender |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113007280A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114469392A (en) * | 2022-03-02 | 2022-05-13 | 佛山市丹特尔医疗器材有限公司 | 6:1 root canal bender for dental treatment |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0525649A1 (en) * | 1991-07-23 | 1993-02-03 | Nakanishi Dental Mfg. Co. Ltd. | Dental handpiece having speed change assembly unit |
| US20130101958A1 (en) * | 2010-01-19 | 2013-04-25 | Micro Mega International Manufactures | Apparatus for moving tools used in surgery |
| CN105616016A (en) * | 2016-03-25 | 2016-06-01 | 佛山市驰康医疗器材有限公司 | Speed-up dental handpiece |
| CN105919681A (en) * | 2016-05-20 | 2016-09-07 | 桂林市啄木鸟医疗器械有限公司 | Dental handpiece driller clamping device |
| CN206036138U (en) * | 2016-08-29 | 2017-03-22 | 佛山市迅腾精密器械有限公司 | Acceleration rate gear |
| CN106974736A (en) * | 2011-11-21 | 2017-07-25 | W和H牙科产品比莫斯有限公司 | Drive device for medical instrument especially dentistry or surgical technique and tools |
| CN110368107A (en) * | 2019-08-05 | 2019-10-25 | 佛山市驰康医疗器材有限公司 | Dental handpiece speedup bender |
| CN211834774U (en) * | 2019-11-11 | 2020-11-03 | 佛山市耐可士医疗器械有限公司 | Transmission long shaft component of dental handpiece |
| CN215059213U (en) * | 2021-02-23 | 2021-12-07 | 常州赛乐医疗技术有限公司 | Speed-increasing dental hand bender |
-
2021
- 2021-02-23 CN CN202110203767.4A patent/CN113007280A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0525649A1 (en) * | 1991-07-23 | 1993-02-03 | Nakanishi Dental Mfg. Co. Ltd. | Dental handpiece having speed change assembly unit |
| US20130101958A1 (en) * | 2010-01-19 | 2013-04-25 | Micro Mega International Manufactures | Apparatus for moving tools used in surgery |
| CN106974736A (en) * | 2011-11-21 | 2017-07-25 | W和H牙科产品比莫斯有限公司 | Drive device for medical instrument especially dentistry or surgical technique and tools |
| CN105616016A (en) * | 2016-03-25 | 2016-06-01 | 佛山市驰康医疗器材有限公司 | Speed-up dental handpiece |
| CN105919681A (en) * | 2016-05-20 | 2016-09-07 | 桂林市啄木鸟医疗器械有限公司 | Dental handpiece driller clamping device |
| CN206036138U (en) * | 2016-08-29 | 2017-03-22 | 佛山市迅腾精密器械有限公司 | Acceleration rate gear |
| CN110368107A (en) * | 2019-08-05 | 2019-10-25 | 佛山市驰康医疗器材有限公司 | Dental handpiece speedup bender |
| CN211834774U (en) * | 2019-11-11 | 2020-11-03 | 佛山市耐可士医疗器械有限公司 | Transmission long shaft component of dental handpiece |
| CN215059213U (en) * | 2021-02-23 | 2021-12-07 | 常州赛乐医疗技术有限公司 | Speed-increasing dental hand bender |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114469392A (en) * | 2022-03-02 | 2022-05-13 | 佛山市丹特尔医疗器材有限公司 | 6:1 root canal bender for dental treatment |
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Application publication date: 20210622 |