Ultrasonic tooth cleaning transducer
By introducing a cooling medium and heat sink into the ultrasonic scaler transducer, the problem of severe transducer overheating was solved, the stability and service life of the equipment were improved, and continuous water rinsing was achieved during the scaling process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN LIANDAQI PRECISION CERAMICS CO LTD
- Filing Date
- 2025-03-12
- Publication Date
- 2026-04-14
AI Technical Summary
The transducers in existing ultrasonic scaling equipment generate significant heat due to their multi-layered piezoelectric ceramic design, which affects the stability and lifespan of the equipment.
The cooling medium inside the rear cover absorbs and dissipates the heat generated by the piezoelectric ceramic plates through the cooling chamber, and the transducer temperature is reduced by adding heat sinks and continuous water supply design.
It effectively maintains the transducer temperature within a reasonable range, improves equipment stability and extends service life, while achieving continuous water supply and rinsing effect during teeth cleaning.
Smart Images
Figure CN224112803U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of medical device technology, and in particular to an ultrasonic dental scaler transducer. Background Technology
[0002] Ultrasonic scaling, as a highly efficient and safe method of teeth cleaning, is widely used in clinical practice. One of the core components of ultrasonic scaling equipment is the transducer (also known as the vibrator), which achieves its cleaning function by converting electrical signals into high-frequency mechanical vibrations. This conversion relies on piezoelectric ceramics. Under the action of alternating voltage, the piezoelectric ceramics undergo expansion and contraction deformation, thereby driving the metal probe to perform high-speed micro-amplitude vibrations to remove dirt, plaque, or tartar from the tooth surface and crevices.
[0003] Existing transducers use multiple stacked PZT piezoelectric ceramics to ensure sufficient amplitude output. While the stacked piezoelectric ceramic design can improve the amplitude intensity to some extent, it also leads to increased heat generation, causing the amplitude transformer to overheat significantly after a period of use. Therefore, further improvements are needed. Utility Model Content
[0004] In order to cool the transducer, this application provides an ultrasonic dental cleaning transducer.
[0005] The ultrasonic dental scaler provided in this application adopts the following technical solution:
[0006] An ultrasonic dental scaler transducer includes an amplitude transformer, a working blade detachably connected to the head end of the amplitude transformer, several piezoelectric ceramic plates stacked on the tail end of the amplitude transformer, and a rear cover plate detachably connected to the tail end of the amplitude transformer to limit and fix the piezoelectric ceramic plates. The tail end of the amplitude transformer has a first threaded hole, and the piezoelectric ceramic plates have through holes coaxially. The rear cover plate has a first connecting post protruding and fixedly inserted into the through holes and threadedly locked to the first threaded hole. The rear cover plate abuts against the end face of the last piezoelectric ceramic plate. The rear cover plate has a cooling cavity extending to the first connecting post, and the cooling cavity is filled with a cooling medium.
[0007] By adopting the above technical solution, the cooling medium inside the rear cover absorbs and dissipates the heat generated by the piezoelectric ceramic sheet through the cooling chamber, keeping the transducer temperature within a reasonable range and reducing the overall heat generation of the transducer, which would otherwise affect the stability and service life of the equipment.
[0008] Preferably, the first connecting post has a threaded section and a smooth axis section. The threaded section of the first connecting post is threadedly locked to the first threaded hole, and the outer peripheral wall of the smooth axis section of the first connecting post abuts against the inner peripheral wall of the through hole.
[0009] By adopting the above technical solution, the outer peripheral wall of the optical axis section of the first connecting post abuts against the inner peripheral wall of the perforation of the piezoelectric ceramic sheet, effectively increasing the contact area between the first connecting post and the piezoelectric ceramic sheet, and transferring the heat emitted by the piezoelectric ceramic sheet in a timely manner.
[0010] Preferably, a heat sink is fixedly connected to the outer peripheral wall of the tail end of the amplitude rod.
[0011] By adopting the above technical solution, the addition of heat sinks effectively increases the contact area between the amplitude transformer and the outside air, promotes rapid heat dissipation, thereby further reducing the temperature rise of the transducer during operation, improving the stability of equipment operation and extending its service life.
[0012] Preferably, the end face of the rear cover plate away from the luffing rod is coaxially provided with a rotating groove.
[0013] By adopting the above technical solution, a rotation groove is opened on the end face of the rear cover plate away from the luffing rod, which makes it easy for the user to rotate the rear cover plate by inserting a tool into the rotation groove, thereby facilitating the assembly and disassembly of the rear cover plate and the luffing rod.
[0014] Preferably, the tail end of the working tool bar is coaxially provided with a second threaded hole, and the head end of the amplitude transformer is protruding and fixed with a second connecting post threaded to the second threaded hole.
[0015] By adopting the above technical solution, the working tool holder and the amplitude transformer can be detachably assembled through a threaded connection.
[0016] Preferably, the amplitude transformer has a first flow channel extending to the end face of the second connecting column, the tail end side wall of the amplitude transformer has a water inlet communicating with the first flow channel, the working cutter bar has a second flow channel communicating with the second threaded hole, the middle part of the working cutter bar has a water outlet end face, and the water outlet end face has a water outlet communicating with the second flow channel.
[0017] By adopting the above technical solution, water can enter the first flow channel from the inlet, and then be transmitted to the second flow channel of the working blade via the second connecting column, finally being sprayed out from the outlet. This design enables continuous water supply during teeth cleaning, effectively rinsing away dirt from the tooth surface and crevices.
[0018] In summary, this utility model has the following beneficial effects:
[0019] 1. The cooling medium inside the rear cover absorbs and dissipates the heat generated by the piezoelectric ceramic plates through the cooling chamber, keeping the transducer temperature within a reasonable range and reducing the overall heat generation of the transducer, which can affect the stability and service life of the equipment.
[0020] 2. Water can enter the first flow channel from the inlet, and then be transmitted to the second flow channel of the working blade via the second connecting column, finally being sprayed out from the outlet. This design enables a continuous water supply during the teeth cleaning process, effectively rinsing away dirt from the tooth surface and crevices. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the structure of an ultrasonic dental scaler transducer.
[0022] In the diagram, 1. Amplitude rod; 11. First threaded hole; 12. Heat sink; 13. Second connecting post; 14. First flow channel; 15. Water inlet; 2. Working tool bar; 21. Second threaded hole; 22. Second flow channel; 23. Water outlet; 24. Tool head; 3. Piezoelectric ceramic plate; 31. Perforation; 4. Rear cover plate; 41. First connecting post; 42. Rotating groove; 43. Cooling chamber; 45. Cooling inlet; 46. Cooling outlet. Detailed Implementation
[0023] The following is in conjunction with the appendix Figure 1 This application will be described in further detail.
[0024] This application discloses an ultrasonic dental scaler transducer, referring to... Figure 1 It includes an amplitude transformer 1, a working knife bar 2 detachably connected to the head end of the amplitude transformer 1, several piezoelectric ceramic sheets 3 stacked on the tail end of the amplitude transformer 1, and a rear cover plate 4 detachably connected to the tail end of the amplitude transformer 1 to limit and fix the piezoelectric ceramic sheets 3. In this embodiment, the number of piezoelectric ceramic sheets 3 is four.
[0025] The tail end of the amplitude rod 1 is coaxially provided with a first threaded hole 11, the piezoelectric ceramic sheet 3 is coaxially provided with a through hole 31, and the rear cover plate 4 is coaxially protruding and fixed with a first connecting post 41 inserted into the through hole 31 and threadedly locked to the first threaded hole 11. In this embodiment, the first connecting post 41 has a threaded section and a smooth axis section. The threaded section of the first connecting post 41 is threadedly locked to the first threaded hole 11, and the outer peripheral wall of the smooth axis section of the first connecting post 41 abuts against the inner peripheral wall of the through hole 31.
[0026] The piezoelectric ceramic plate 3 closest to the working tool holder 2 abuts against the tail end face of the amplitude transformer 1, and the rear cover plate 4 abuts against the end face of the last piezoelectric ceramic plate 3. A rotating groove 42 is coaxially formed on the end face of the rear cover plate 4 away from the amplitude transformer 1, and the rotating groove 42 has a polygonal cross-section. The rear cover plate 4 has a cooling cavity 43 extending to the first connecting post 41. A cooling inlet 45 communicating with the cooling cavity 43 is formed on the outer side wall of the rear cover plate 4, and a cooling outlet 46 communicating with the cooling cavity 43 is formed on the other outer side wall of the rear cover plate 4. The cooling cavity 43 is filled with a cooling medium. In this embodiment, the cooling medium is coolant. Cooling conduits are installed at the cooling inlet 45 and the cooling outlet 46, respectively, and these conduits are connected to a coolant tank, enabling the circulation of coolant into the cooling cavity 43.
[0027] A heat sink 12 is coaxially fixed to the outer peripheral wall of the tail of the amplitude rod 1. In this embodiment, three heat sinks 12 are provided. The addition of heat sinks 12 effectively increases the contact area between the amplitude rod 1 and the outside air, promoting the rapid dissipation of heat.
[0028] The tail end of the working cutter bar 2 is coaxially provided with a second threaded hole 21, and the head end of the amplitude rod 1 is coaxially protruding and fixed with a second connecting post 13 threaded to the second threaded hole 21. The amplitude rod 1 has a first flow channel 14, which extends to the end face of the second connecting post 13. The tail end side wall of the amplitude rod 1 is provided with a water inlet 15 communicating with the first flow channel 14. The working cutter bar 2 is provided with a second flow channel 22 communicating with the second threaded hole 21. The middle part of the working cutter bar 2 has a water outlet end face, and the water outlet end face is provided with a water outlet 23 communicating with the second flow channel 22. A cutter head 24 located on one side of the water outlet 23 is fixedly connected to the water outlet end face of the working cutter bar 2, and the head of the cutter head 24 is bent. By connecting a water inlet pipe to the outside of the water-saving port, water can enter the first flow channel 14 from the water inlet 15, and be transmitted to the second flow channel 22 of the working cutter bar 2 via the second connecting post 13, and finally spray out from the water outlet 23.
[0029] The implementation principle of an ultrasonic dental scaler transducer according to an embodiment of this application is as follows: Coolant enters the cooling chamber 43 from the cooling inlet 45 and flows out from the cooling outlet 46, ensuring that the coolant can fully absorb the heat generated by the piezoelectric ceramic plate 3, thereby better maintaining the transducer's operating temperature and improving the equipment's stability and service life. Water can enter the first flow channel 14 from the water inlet 15 and be transmitted to the second flow channel 22 of the working blade 2 via the second connecting column 13, finally spraying out from the water outlet 23, achieving continuous water supply during the dental scaling process and effectively rinsing away dirt from the tooth surface and crevices.
[0030] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. An ultrasonic dental scaler transducer, characterized in that: The device includes an amplitude transformer (1), a working tool bar (2) detachably connected to the head end of the amplitude transformer (1), several piezoelectric ceramic plates (3) stacked on the tail end of the amplitude transformer (1), and a rear cover plate (4) detachably connected to the tail end of the amplitude transformer (1) to limit and fix the piezoelectric ceramic plates (3). The tail end of the amplitude transformer (1) is provided with a first threaded hole (11), and the piezoelectric ceramic plates (3) are coaxially provided with a through hole (31). The rear cover plate (4) has a first connecting post (41) protruding and fixedly inserted into the through hole (31) and threadedly locked to the first threaded hole (11). The rear cover plate (4) abuts against the end face of the last piezoelectric ceramic plate (3). The rear cover plate (4) has a cooling cavity (43) extending to the first connecting post (41) and is filled with a cooling medium.
2. The ultrasonic dental scaler transducer according to claim 1, characterized in that: The first connecting post (41) has a threaded section and a smooth axis section. The threaded section of the first connecting post (41) is threadedly locked to the first threaded hole (11), and the outer peripheral wall of the smooth axis section of the first connecting post (41) abuts against the inner peripheral wall of the through hole (31).
3. An ultrasonic dental scaler transducer according to claim 1, characterized in that: A heat sink (12) is fixedly connected to the outer peripheral wall of the tail of the amplitude rod (1).
4. An ultrasonic dental scaler transducer according to claim 1, characterized in that: The rear cover plate (4) has a rotating groove (42) coaxially formed on the end face away from the amplitude rod (1).
5. An ultrasonic dental scaler transducer according to claim 1, characterized in that: The tail end of the working tool bar (2) is coaxially provided with a second threaded hole (21), and the head end of the amplitude rod (1) is provided with a second connecting post (13) threadedly connected to the second threaded hole (21).
6. An ultrasonic dental scaler transducer according to claim 5, characterized in that: The amplitude rod (1) has a first flow channel (14), which extends to the end face of the second connecting column (13). The tail end side wall of the amplitude rod (1) is provided with a water inlet (15) connected to the first flow channel (14). The working knife bar (2) is provided with a second flow channel (22) connected to the second threaded hole (21). The middle part of the working knife bar (2) has a water outlet end face, and the water outlet end face is provided with a water outlet (23) connected to the second flow channel (22).