A handpiece, dental handpiece and root canal shaping and cleaning device

Abstract

The application relates to the technical field of dental equipment, and relates to a handpiece, which comprises a swabbing working tip, a transmission shaft and a transmission connecting piece, the swabbing working tip and the transmission connecting piece are connected at two ends of the transmission shaft respectively, and the transmission shaft is suitable for being detachably connected with a driving assembly through the transmission connecting piece. The application also relates to a dental handheld device and a root canal shaping and cleaning device. The technical scheme provided by the application can drive the swabbing working tip to perform acoustic wave swabbing through the driving assembly, the transmission connecting piece and the transmission shaft, the transmission structure is simple, the power transmission path is short, the transmission efficiency is high, noise can be reduced, the treatment experience of a patient can be improved, meanwhile, the application can release the connection between the handpiece and a handle shell, so that the handpiece can be completely detached after use, high-temperature steam sterilization can be performed on the handpiece, use is convenient, and the risk of cross infection can be eliminated.

Description

Technical Field

[0001] This application relates to the field of dental equipment technology, and more specifically, to a dental handheld device and a root canal shaping and cleaning device. Background Technology

[0002] In a routine root canal surgery, root canal preparation and irrigation are performed together. After root canal preparation, a root canal irrigator is usually used to disinfect and irrigate the root canal. Most of the root canal irrigators currently available on the market are ultrasonic irrigators, which use high-frequency ultrasonic vibration to drive the metal working tip to vibrate the disinfectant solution in the root canal to achieve the effect of disinfection and irrigation.

[0003] Existing integrated sonic irrigation devices have an output shaft located at the front end of the root canal irrigation device handle, with a working tip mounted on the output shaft. During operation, the working tip extends into the patient's mouth, thus becoming contaminated with saliva and blood from the patient's mouth. Because its circuit board, battery, and other circuit components are all installed inside the handle, the entire sonic irrigation device cannot be sterilized by high-temperature steaming, posing a risk of cross-infection.

[0004] Meanwhile, some existing technologies include detachable irrigation devices that use an irrigation wicker in conjunction with a root canal preparation machine. The irrigation wicker can be detached from the root canal preparation machine, thus enabling high-temperature sterilization. However, the irrigation wicker has a transmission part, an eccentric part, meshing gears, and an eccentric rotor, making the transmission structure complex. During operation, the high-speed rotating gears and eccentrically rotating parts generate significant noise, resulting in a poor treatment experience for patients.

[0005] Therefore, existing technology cannot meet the needs. Utility Model Content

[0006] The technical problem to be solved by the embodiments of this application is that existing integrated sonic rinsing devices are usually equipped with circuit boards, batteries and other circuit components, which cannot sterilize the entire dental handheld device by high-temperature steaming, posing a risk of cross-infection. At the same time, some existing detachable rinsing devices have complex transmission structures installed in the detachable head, which generate a lot of noise when running, resulting in a poor user experience.

[0007] To solve the above-mentioned technical problems, this application provides a machine head that adopts the following technical solution, including:

[0008] The washing working tip, the drive shaft, and the drive connector are respectively connected to both ends of the drive shaft, and the drive shaft is adapted to be detachably connected to the drive assembly via the drive connector.

[0009] Furthermore, the machine head also includes a bushing, which is sleeved on the drive shaft and rotatably connected to the drive shaft; at least two bearings are also provided inside the bushing, and the drive shaft is rotatably disposed inside the bushing through the bearings.

[0010] Furthermore, the mounting portion of the washing working tip is coaxially arranged with the drive shaft.

[0011] Furthermore, bearing cavities are provided at both ends of the bushing, and the bearing is fixedly disposed in the bearing cavity.

[0012] Furthermore, the drive shaft includes a first section and a second section, the diameter of the second section being larger than the diameter of the first section, such that a first stepped surface is formed between the first section and the second section, the bearings are all connected to the first section, and the first section passes through the bushing, the rinsing working tip is detachably and circumferentially fixedly connected to the second section, and the first stepped surface abuts against the bearing located on the side near the rinsing working tip.

[0013] Furthermore, the transmission connector is detachably and circumferentially fixedly connected to the first segment and abuts against the bearing located on the side away from the washing working tip.

[0014] Furthermore, the machine head also includes a housing, which is sleeved on the bushing. The bushing is provided with a first thread, and the bushing is connected to the housing through the first thread.

[0015] Furthermore, the housing is provided with a first mounting cavity and a second mounting cavity, and a second stepped surface is provided between the first mounting cavity and the second mounting cavity. The bushing is disposed in the first mounting cavity, the second section is disposed in the second mounting cavity and extends to the outside of the second mounting cavity, and the bearing located near the washing working tip abuts against the second stepped surface.

[0016] Furthermore, the bushing is also provided with a second thread, and the machine head also includes a first connector adapted to be detachably connected to the housing of the handle, and the bushing is connected to the first connector via the second thread.

[0017] Furthermore, a first annular groove is formed between the housing and the rinsing working tip; and / or,

[0018] The housing is provided with a second annular groove at one end near the rinsing working tip; and / or,

[0019] The mounting part of the washing working tip is provided with a protruding structure.

[0020] Furthermore, the vibration frequency of the washing working tip is 50–300 Hz; and / or,

[0021] The rotation angle of the rinsing working tip is ±7°.

[0022] To address the aforementioned technical problems, this application provides a dental handheld device, which employs the following technical solution: a handle and a head, wherein a drive assembly is disposed within the handle, the drive assembly is used to drive the transmission shaft, and one end of the handle's outer shell is detachably connected to a first connector of the head.

[0023] To address the aforementioned technical problems, this application provides a root canal shaping and cleaning device, which employs the following technical solution: a root canal preparation and shaping head and the dental handheld device, wherein the root canal preparation and shaping head is adapted to be replaced with the head, so that the root canal preparation and shaping head is detachably connected to the handheld device.

[0024] Compared with the prior art, the embodiments of this application have the following advantages: The rinsing working tip and the transmission connector are respectively connected to both ends of the transmission shaft, so that the drive assembly drives the rinsing working tip to perform sonic rinsing through the transmission connector and the transmission shaft. The transmission structure is simple, the power transmission path is short, and the transmission efficiency is high, which can reduce noise and improve the patient's treatment experience. At the same time, the rinsing working tip, transmission shaft and transmission connector provided in the head of this application are mechanical components, and the transmission shaft is suitable for detachable transmission connection with the drive assembly through the transmission connector. That is, the connection between the head and the handle shell can be disconnected, so that the entire head can be removed after use for high-temperature steam sterilization. It is convenient to use and can eliminate the risk of cross-infection. Attached Figure Description

[0025] To more clearly illustrate the solution of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a front view of the head of the machine according to an embodiment of this application;

[0027] Figure 2 This is an exploded view of the head unit according to an embodiment of this application;

[0028] Figure 3 This is a cross-sectional view of the head of the machine according to an embodiment of this application;

[0029] Figure 4 yes Figure 3 Enlarged diagram of A in the middle;

[0030] Figure 5 yes Figure 3 Enlarged diagram of B in the diagram;

[0031] Figure 6 This is a schematic diagram of the structure of the rinsing working tip according to an embodiment of this application;

[0032] Figure 7 This is a schematic diagram of the bushing structure according to an embodiment of this application.

[0033] Reference numerals: 1. Washing working tip; 11. Protruding structure; 12. Slot; 2. Drive shaft; 21. First section; 22. Second section; 23. First stepped surface; 3. Bushing; 31. Bearing cavity; 32. First thread; 33. Second thread; 4. Transmission connecting piece; 5. Bearing; 7. Housing; 71. First mounting cavity; 72. Second mounting cavity; 73. Second stepped surface; 74. Second annular groove; 8. First connecting piece; 81. Arc-shaped groove; 9. First annular groove. Detailed Implementation

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0035] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0036] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0037] Please see the appendix Figure 1 ~Attached Figure 7 As shown, an embodiment of this application provides a head unit, including:

[0038] The washing working tip 1, the drive shaft 2, and the drive connector 4 are respectively connected to the two ends of the drive shaft 2. The drive shaft 2 is adapted to be detachably connected to the drive assembly through the drive connector 4.

[0039] The washing tip 1 and the transmission connector 4 described in this application are respectively connected to both ends of the transmission shaft 2, so that the drive assembly drives the washing tip to perform sonic washing through the transmission connector 4 and the transmission shaft 2. The transmission structure is simple, the power transmission path is short, and the transmission efficiency is high, which can reduce noise and improve the patient's treatment experience. At the same time, the washing tip 1, transmission shaft 2 and transmission connector 4 provided in the head of this application are mechanical components, and the transmission shaft 2 is adapted to be detachably connected to the drive assembly through the transmission connector 4. That is, the connection between the head and the handle shell can be disconnected, so that the entire head can be removed after use for high-temperature steam sterilization. It is convenient to use and can eliminate the risk of cross-infection.

[0040] Furthermore, the drive shaft 2 is adapted to be detachably connected to the drive assembly via the drive connector 4, that is, the drive connector 4 is detachably connected to the drive assembly, and the drive connector 4 is connected to the drive assembly in a transmission manner. By disconnecting the connection between the drive connectors 4, the connection between the head and the handle housing can be disconnected, so that the entire head can be removed after use.

[0041] As attached Figure 2 To be continued Figure 5 As shown, in some embodiments, the machine head further includes a bushing 3, which is sleeved on the drive shaft 2 and rotatably connected to the bushing 3. At least two bearings 5 ​​are also provided inside the bushing 3, and the drive shaft 2 is rotatably mounted within the bushing 3 via the bearings 5. The bearings 5 ​​can support the drive shaft 2, reduce its sway, decrease noise, and improve its transmission efficiency.

[0042] As attached Figure 2 To be continued Figure 5 As shown, in some embodiments, the bearing 5 is configured as a sliding bearing. The drive shaft 2, driven by the drive assembly, performs high-frequency, small-angle alternating forward and reverse rotations, i.e., high-frequency periodic vibration, rather than high-speed rotation. Therefore, configuring the bearing 5 as a sliding bearing reduces costs, better adapts to the high-frequency periodic vibration of the drive shaft 2, reduces the sway of the drive shaft 2, reduces noise, and thus improves the transmission efficiency of the drive shaft 2.

[0043] As attached Figure 1As shown, in some embodiments, the vibration frequency of the rinsing working tip 1 is 50–300 Hz. The rotation angle of the rinsing working tip 1 is ±7°. This facilitates the high-frequency periodic vibration of the rinsing working tip 1 for acoustic rinsing.

[0044] Furthermore, the vibration frequency of the rinsing working tip 1 is 50-300Hz. Preferably, taking a vibration frequency of 200Hz as an example, the transmission shaft 2 rotates 3° clockwise and 3° counterclockwise as one cycle, and will perform 12,000 cycles within 1 minute, thereby driving the rinsing working tip 1 to vibrate at a high frequency periodically.

[0045] As attached Figure 1 To be continued Figure 3 As shown, in some embodiments, the mounting portion of the rinsing working tip 1 is coaxially arranged with the drive shaft 2. This coaxial arrangement eliminates the need for a series of transmission components such as eccentric parts, gears, and eccentric rotors in the machine head, resulting in a simple transmission structure, a short power transmission path, and improved transmission efficiency of the drive shaft 2. It also avoids noise caused by high-speed gear meshing and eccentric operation, thus enhancing the patient's treatment experience.

[0046] As attached Figure 2 To be continued Figure 5 As shown, in some embodiments, the bushing 3 has bearing cavities 31 at both ends, and the bearing 5 is fixedly disposed within the bearing cavities 31. This facilitates the positioning and fixing of the bearing 5, thereby enabling the bearing 5 to support the transmission shaft 2, reducing the sway of the transmission shaft 2, reducing noise, and improving the transmission efficiency of the transmission shaft 2.

[0047] As attached Figure 3 To be continued Figure 5 As shown, in some embodiments, the drive shaft 2 includes a first segment 21 and a second segment 22, the diameter of the second segment 22 being larger than the diameter of the first segment 21, such that a first stepped surface 23 is formed between the first segment 21 and the second segment 22. The bearings 5 ​​are all connected to the first segment 21, and the first segment 21 passes through the bushing 3. The rinsing working tip 1 is detachably and circumferentially fixedly connected to the second segment 22. The first stepped surface 23 abuts against the bearing 5 located near the rinsing working tip 1. This facilitates the positioning and fixing of the drive shaft 2 and the bearings 5, prevents displacement of the drive shaft 2 and bearings 5 ​​during high-frequency periodic vibration, ensures the supporting function of the bearings 5, reduces the sway of the drive shaft 2, reduces noise, and improves the transmission efficiency of the drive shaft 2.

[0048] Furthermore, the mounting part of the rinsing working tip 1 is provided with a slot 12 for accommodating the second segment 22. A first plane is provided in the slot 12, and a second plane is provided on the outer peripheral surface of the second segment 22. After assembly, the first plane and the second plane cooperate to fix the rinsing working tip 1 and the second segment 22 in a circumferential connection.

[0049] Furthermore, this application provides two bearings 5, which are located at both ends of the first segment 21, so that the bearings 5 ​​can provide support for the transmission shaft 2.

[0050] Furthermore, the rinsing working tip 1 is detachably and circumferentially fixedly connected to the second section 22, which facilitates transmission and disassembly / reassembly.

[0051] As attached Figure 3 To be continued Figure 5 As shown, in some embodiments, the transmission connector 4 is detachably circumferentially fixedly connected to the first segment 21 and abuts against the bearing 5 located on the side away from the rinsing tip 1. This prevents the transmission connector 4 from rotating relative to the drive shaft 2, which facilitates the drive assembly to transmit high-frequency periodic vibrations to the drive shaft 2 via the transmission connector 4, and simultaneously to the rinsing tip 1 via the drive shaft 2, so that the rinsing tip 1 performs sonic rinsing, vibrating the disinfectant solution within the root canal to achieve disinfection and rinsing effects.

[0052] Furthermore, the transmission connector 4 is interference-fitted with the first segment 21 or laser-welded, which facilitates the formation of a circumferential fixed connection.

[0053] Furthermore, the transmission connector 4 is detachably and circumferentially fixedly connected to the first segment 21, which facilitates transmission and assembly / disassembly.

[0054] As attached Figure 1 To be continued Figure 5 and attached Figure 7As shown, in some embodiments, the instrument head further includes a housing 7, which is sleeved on the bushing 3. The bushing 3 is provided with a first thread 32, and the bushing 3 is connected to the housing 7 through the first thread 32. The housing 7 can effectively protect the drive shaft 2 and the bushing 3, ensuring the transmission efficiency of the drive shaft 2. It can also agitate the disinfectant solution in the root canal, improving the disinfection and rinsing effect. The connection through the first thread 32 facilitates the separation of various components, thereby allowing for high-temperature sterilization of all components of the entire instrument head and eliminating the risk of cross-infection.

[0055] As attached Figure 1 To be continued Figure 5 As shown, in some embodiments, the housing 7 is provided with a first mounting cavity 71 and a second mounting cavity 72, and a second stepped surface 73 is provided between the first mounting cavity 71 and the second mounting cavity 72. The bushing 3 is disposed in the first mounting cavity 71, and the second segment 22 is disposed in the second mounting cavity 72 and extends beyond the second mounting cavity 72. The bearing 5 located near the washing working tip 1 abuts against the second stepped surface 73. This facilitates the installation and positioning of the bearing 5, thereby enabling the bearing 5 to support the drive shaft 2, reduce the sway of the drive shaft 2, reduce noise, and improve the transmission efficiency of the drive shaft 2.

[0056] As attached Figure 3 To be continued Figure 5 and attached Figure 7 As shown, in some embodiments, the bushing 3 is further provided with a second thread 33, and the handpiece also includes a first connector 8 adapted for detachable connection with the housing of the handle. The bushing 3 is connected to the first connector 8 via the second thread 33. The handpiece is easy to connect to the root canal preparation machine and is convenient to assemble and disassemble, thereby allowing the entire handpiece to be sterilized by high-temperature steaming, eliminating the risk of cross-infection.

[0057] As attached Figure 1 To be continued Figure 3 and attached Figure 6 As shown, in some embodiments, a first annular groove 9 is formed between the housing 7 and the rinsing tip 1. A second annular groove 74 is provided at one end of the housing 7 near the rinsing tip 1. A protruding structure 11 is provided on the rinsing tip 1. This allows the user to grip the second annular groove 74 with one hand and reach into the first annular groove 9 or pinch the protruding structure 11 with the other hand, thereby applying force to remove the rinsing tip 1 from the drive shaft 2, and thus perform high-temperature steam sterilization on all components of the machine head, eliminating the risk of cross-infection.

[0058] Based on the aforementioned handpiece, this application provides a dental handheld device, which adopts the following technical solution, including: a handle and the handpiece, wherein a drive assembly is provided inside the handle, the drive assembly is used to drive the transmission shaft 2, and one end of the outer shell of the handle is detachably connected to the first connector of the handpiece.

[0059] The washing tip 1 and the transmission connector 4 described in this application are respectively connected to both ends of the transmission shaft 2, so that the drive assembly drives the washing tip to perform sonic washing through the transmission connector 4 and the transmission shaft 2. The transmission structure is simple, the power transmission path is short, and the transmission efficiency is high, which can reduce noise and improve the patient's treatment experience. At the same time, the washing tip 1, transmission shaft 2 and transmission connector 4 provided in the head of this application are mechanical components, and the transmission shaft 2 is adapted to be detachably connected to the drive assembly through the transmission connector 4. That is, the connection between the head and the handle shell can be disconnected, so that the entire head can be removed after use for high-temperature steam sterilization. It is convenient to use and can eliminate the risk of cross-infection.

[0060] Based on the aforementioned handpiece and dental handheld device, this application provides a root canal preparation and cleaning device, which adopts the following technical solution, including: a root canal preparation and shaping handpiece and the dental handheld device, wherein the root canal preparation and shaping handpiece is adapted to be replaced with the handpiece so that the root canal preparation and shaping handpiece is detachably connected to the handheld device.

[0061] The rinsing tip 1 and the transmission connector 4 described in this application are respectively connected to both ends of the transmission shaft 2, so that the drive assembly drives the rinsing tip to perform sonic rinsing through the transmission connector 4 and the transmission shaft 2. The transmission structure is simple, the power transmission path is short, and the transmission efficiency is high, which can reduce noise and improve the patient's treatment experience. At the same time, the rinsing tip 1, the transmission shaft 2, and the transmission connector 4 provided in the root canal preparation and shaping head in this application are mechanical components, and the transmission shaft 2 is adapted to be detachably connected to the drive assembly through the transmission connector 4. That is, the connection between the root canal preparation and shaping head and the handle housing can be disconnected, so that the entire root canal preparation and shaping head can be removed after use for high-temperature steam sterilization. It is convenient to use and can eliminate the risk of cross-infection.

[0062] Furthermore, the drive assembly is configured as a root canal preparation machine, which contains circumferentially distributed elastic spheres. When the machine head is inserted into the root canal preparation machine, the elastic spheres engage within the arc-shaped groove 81 of the first connector 8, completing the connection. The root canal preparation machine contains a brushless motor, which is connected to the transmission connector 4 via a connector, forming a coupling. The drive plate within the root canal preparation machine transmits a waveform to the brushless motor, which drives the rinsing tip 1 to perform high-frequency periodic vibration. Simultaneously, because the tip of the rinsing tip 1 is very soft, it amplifies the amplitude of rotation, obtaining the required amplitude for rinsing, thus agitating the disinfectant solution within the root canal and improving the disinfection and rinsing effects.

[0063] Obviously, the embodiments described above are only some embodiments of this application, not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this application's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this application.

Claims

1. A machine head, characterized in that, It includes a washing working tip (1), a drive shaft (2) and a drive connector (4). The washing working tip (1) and the drive connector (4) are respectively connected to the two ends of the drive shaft (2). The drive shaft (2) is adapted to be detachably connected to the drive assembly through the drive connector (4). The machine head also includes a bushing (3), which is sleeved on the drive shaft (2) and the drive shaft (2) is rotatably connected to the bushing (3); at least two bearings (5) are also provided inside the bushing (3), and the drive shaft (2) is rotatably disposed inside the bushing (3) through the bearings (5); The drive shaft (2) includes a first section (21) and a second section (22). The diameter of the second section (22) is larger than that of the first section (21), so that a first step surface (23) is formed between the first section (21) and the second section (22). The bearings (5) are all connected to the first section (21), and the first section (21) passes through the bushing (3). The rinsing working tip (1) is detachably and circumferentially fixedly connected to the second section (22). The first step surface (23) abuts against the bearing (5) located on the side close to the rinsing working tip (1).

2. The machine head according to claim 1, characterized in that, The mounting part of the washing working tip (1) is coaxially arranged with the drive shaft (2).

3. The machine head according to claim 1, characterized in that, The bushing (3) has bearing cavities (31) at both ends, and the bearing (5) is fixedly installed in the bearing cavity (31).

4. The machine head according to claim 1, characterized in that, The transmission connector (4) is detachably circumferentially fixed to the first segment (21) and abuts against the bearing (5) located on the side away from the washing working tip (1).

5. The machine head according to claim 4, characterized in that, The machine head also includes a housing (7), which is sleeved on the bushing (3). The bushing (3) is provided with a first thread (32), and the bushing (3) is connected to the housing (7) through the first thread (32).

6. The machine head according to claim 5, characterized in that, The housing (7) is provided with a first mounting cavity (71) and a second mounting cavity (72). A second step surface (73) is provided between the first mounting cavity (71) and the second mounting cavity (72). The bushing (3) is provided in the first mounting cavity (71). The second section (22) is provided in the second mounting cavity (72) and extends to the outside of the second mounting cavity (72). The bearing (5) located near the washing working tip (1) abuts against the second step surface (73).

7. The machine head according to claim 6, characterized in that, The bushing (3) is also provided with a second thread (33), and the machine head also includes a first connector (8) adapted to be detachably connected to the housing of the handle. The bushing (3) is connected to the first connector (8) through the second thread (33).

8. The machine head according to claim 5, characterized in that, A first annular groove (9) is formed between the housing (7) and the rinsing working tip (1); and / or, The housing (7) has a second annular groove (74) at one end near the rinsing working tip (1); and / or, The mounting part of the washing working tip (1) is provided with a protruding structure (11).

9. The machine head according to claim 1, characterized in that, The vibration frequency of the washing working tip (1) is 50–300 Hz; and / or, The rotation angle of the washing working tip (1) is ±7°.

10. A dental handheld device, characterized in that, Includes a handle and a machine head as described in any one of claims 1-9, wherein the handle is provided with a drive assembly for driving the transmission shaft (2), and one end of the outer shell of the handle is detachably connected to the first connector of the machine head.

11. A root canal shaping and cleaning device, characterized in that, The device includes a root canal preparation and shaping head and a dental handheld device as claimed in claim 10, wherein the root canal preparation and shaping head is adapted to be interchangeable with the head such that the root canal preparation and shaping head is detachably connected to the handheld device.

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