Electric toothbrush with hidden motor output shaft

Abstract

This invention discloses an electric toothbrush with a concealed motor output shaft, including a handle assembly, a drive mechanism, a connecting assembly, a brush head, and a cleaning section. By using a sealing sleeve, a sealing slot, a sealing block, and a sealing insert, the drive mechanism is completely isolated from the outside environment, preventing direct contact between the motor output shaft and transmission components and saliva, toothpaste residue, etc., in the mouth. This effectively reduces the chance of bacterial growth and protects the user's oral health. The sealing sleeve effectively prevents external moisture from seeping into the brush handle, protecting the drive motor and other electronic components from water corrosion, greatly improving the durability and lifespan of the electric toothbrush. The use of magnetic coupling transmission avoids the wear and noise problems of gears, couplings, and other components in traditional mechanical transmissions. The transmission process is smooth and reliable, and it has an overload protection function. When the brush head experiences excessive resistance, slippage occurs between the active and driven magnets, protecting the drive motor from damage.

Description

Technical Field

[0001] This invention belongs to the field of electric toothbrush technology, specifically an electric toothbrush with a concealed motor output shaft. Background Technology

[0002] As oral care appliances continue to evolve and upgrade, electric toothbrushes have gradually become a core tool for daily oral care in modern households due to their efficient cleaning capabilities and convenient user experience. However, as consumers increasingly demand higher standards in product performance, hygiene, safety, and design, the structural design of traditional electric toothbrushes has revealed shortcomings that are incompatible with market needs. The exposed motor output shaft design is one of the key areas that urgently needs improvement.

[0003] Traditional electric toothbrushes typically extend the motor output shaft directly to the front of the handle to drive the brush head, forming a mechanical connection. While this design meets basic power transmission requirements, it presents several hidden problems over long-term use. Because the output shaft penetrates the handle housing to connect with the external brush head, a gap inevitably exists between it and the housing. Saliva and toothpaste residue, frequently encountered in the oral environment, easily adhere to the output shaft surface through this gap. This not only provides a breeding ground for bacteria, increasing the risk of cross-infection in the oral cavity, but also leads to the accumulation of stains on the output shaft and connecting parts over time, affecting the ease of cleaning and maintenance.

[0004] More importantly, moisture, a common medium in oral care, can easily seep into the brush handle through the aforementioned gaps, corroding core components such as the motor and circuitry, severely shortening the lifespan of the electric toothbrush and increasing user costs.

[0005] Therefore, it is necessary to invent an electric toothbrush with a hidden motor output shaft to solve the above problems. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides an electric toothbrush with a concealed motor output shaft to solve the problem mentioned in the background art that water can easily seep into the brush handle through the gaps, causing corrosion to core components such as the motor and circuit, and seriously shortening the service life of the electric toothbrush.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an electric toothbrush with a concealed motor output shaft, comprising a handle assembly, a connecting assembly, and a brush head. The connecting assembly is used to connect the handle assembly and the brush head. The handle assembly includes a handle body with a hollow internal structure. The brush head is provided with a cleaning part. The handle body is provided with a driving mechanism for driving the brush head and the cleaning part. The driving mechanism includes a drive motor, a first transmission assembly, and a second transmission assembly.

[0008] As a further description of the above technical solution, the drive motor is fixedly installed inside the brush handle body by a mounting base, the motor output shaft extends horizontally forward, the first transmission component includes an active magnet and a first magnet bracket, the first magnet bracket is fixedly installed at the front end of the motor output shaft and rotatably connected to the brush handle body, and the active magnet is fixedly embedded in the front end face of the first magnet bracket.

[0009] As a further description of the above technical solution, the second transmission component includes a driven magnet and a second magnet bracket. The second magnet bracket is rotatably installed inside the brush handle body. The driven magnet is fixedly embedded in the rear end face of the second magnet bracket. The driven magnet and the active magnet are arranged opposite to each other, and their magnetic poles match each other. Transmission is achieved through magnetic coupling. The driven magnet is also provided with a connecting shaft. One end of the connecting shaft extends out of the brush handle body and is detachably connected to the connecting component.

[0010] As a further description of the above technical solution, the connecting component includes a sealing isolation sleeve rotatably disposed on the top of the brush handle body, the sealing isolation sleeve having a sealing slot, and the sealing isolation sleeve being made of a non-magnetic material;

[0011] As a further description of the above technical solution, the connecting assembly also includes a connecting seat, a sealing block is fixedly connected to the bottom of the connecting seat, a sealing insert is provided on the sealing block that matches the size of the sealing slot, and a connecting hole for cooperating with the connecting shaft is also provided at the bottom of the connecting seat.

[0012] As a further description of the above technical solution, the component also includes a battery and a control circuit board located inside the brush handle body. The battery is electrically connected to the control circuit board, and the control circuit board is electrically connected to the drive motor. A switch button is provided on the control circuit board, and the switch button protrudes from the surface of the brush handle body for controlling the electric toothbrush to turn on and off.

[0013] As a further description of the above technical solution, a charging interface is provided at the rear end of the brush handle body. The charging interface is electrically connected to the control circuit board and is used to charge the battery.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. This invention completely isolates the drive mechanism from the outside world by setting a sealing isolation sleeve, sealing slot, sealing block and sealing insert, avoiding direct contact between the motor output shaft and transmission components and saliva, toothpaste residue and other substances in the mouth, effectively reducing the chance of bacterial growth and protecting the user's oral health. The sealing isolation sleeve can effectively prevent external moisture from seeping into the brush handle, protecting the drive motor and other electronic components from water corrosion, and greatly improving the durability and service life of the electric toothbrush.

[0016] 2. This invention avoids the wear and noise problems of gears, couplings and other components in traditional mechanical transmission by adopting magnetic coupling transmission. The transmission process is smooth and reliable, and has an overload protection function. When the brush head is subjected to excessive resistance, the active magnet and the driven magnet will slip, protecting the drive motor from damage and further improving the service life of the drive motor. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of the overall structure of the electric toothbrush with a concealed motor output shaft provided by the present invention;

[0019] Figure 2 A schematic diagram of the internal structure of the electric toothbrush with a concealed motor output shaft provided by the present invention;

[0020] Figure 3 A schematic diagram of the connecting shaft structure of the electric toothbrush with a concealed motor output shaft provided by the present invention;

[0021] Figure 4 This is a schematic diagram of the connection assembly structure of the electric toothbrush with a concealed motor output shaft provided by the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Brush handle assembly; 11. Brush handle body; 12. Control circuit board; 13. Mounting base; 14. Switch button; 15. Charging interface; 2. Drive mechanism; 21. Drive motor; 22. First magnet bracket; 23. Active magnet; 24. Second magnet bracket; 25. Driven magnet; 26. Connecting shaft; 3. Connecting assembly; 31. Sealing isolation sleeve; 32. Sealing slot; 33. Connecting base; 34. Sealing block; 35. Sealing insert; 36. Connecting hole; 4. Brush head; 5. Cleaning section. Detailed Implementation

[0024] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Example:

[0027] See attached document Figures 1-4 The electric toothbrush with a concealed motor output shaft in this embodiment includes a handle assembly 1, a connecting assembly 3, and a brush head 4. The connecting assembly 3 is used to connect the handle assembly 1 and the brush head 4. The handle assembly 1 includes a handle body 11 with a hollow internal structure. The brush head 4 is provided with a cleaning part 5. A drive mechanism 2 for driving the brush head 4 and the cleaning part 5 is provided inside the handle body 11. The drive mechanism 2 includes a drive motor 21, a first transmission assembly, and a second transmission assembly. The handle assembly 1 also includes a battery and a control circuit board 12 located inside the handle body 11. The battery is electrically connected to the control circuit board 12, and the control circuit board 12 is electrically connected to the drive motor 21. A switch button 14 is provided on the control circuit board 12. The switch button 14 protrudes from the surface of the handle body 11 and is used to control the opening and closing of the electric toothbrush. A charging interface 15 is also provided at the rear end of the handle body 11. The charging interface 15 is electrically connected to the control circuit board 12 and is used to charge the battery.

[0028] See attached document Figure 2 and Figure 3 The drive motor 21 is fixedly installed inside the brush handle body 11 via the mounting base 13. The motor output shaft extends horizontally forward. The first transmission component includes an active magnet 23 and a first magnet bracket 22. The first magnet bracket 22 is fixedly installed at the front end of the motor output shaft and rotatably connected to the brush handle body 11. The active magnet 23 is fixedly embedded in the front end face of the first magnet bracket 22. The second transmission component includes a driven magnet 25 and a second magnet bracket 24. The second magnet bracket 24 is rotatably installed inside the brush handle body 11. The driven magnet 25 is fixedly embedded in the rear end face of the second magnet bracket 24. The driven magnet 25 and the active magnet 23 are arranged opposite to each other, and their magnetic poles match each other. Transmission is achieved through magnetic coupling. A connecting shaft 26 is also provided on the driven magnet 25. One end of the connecting shaft 26 extends out of the brush handle body 11 and is detachably connected to the connecting component 3.

[0029] See attached document Figure 3 and Figure 4 The connecting component 3 includes a sealing isolation sleeve 31 rotatably mounted on the top of the brush handle body 11. The sealing isolation sleeve 31 has a sealing slot 32. The sealing isolation sleeve 31 is made of non-magnetic material. The connecting component 3 also includes a connecting seat 33. One end of the connecting seat 33 is fixedly connected to the brush head 4. A sealing block 34 is fixedly connected to the bottom of the connecting seat 33. A sealing insert 35 matching the size of the sealing slot 32 is provided on the sealing block 34. A connecting hole 36 that mates with the connecting shaft 26 is also provided at the bottom of the connecting seat 33.

[0030] Therefore, in actual use, the user will connect the connector to the connecting shaft 26 through the connecting hole 36, insert the sealing block 35 into the sealing slot 32, and then press the switch button 14. The control circuit board 12 will connect the circuit between the battery and the drive motor 21. The drive motor 21 will start and drive the motor output shaft to rotate. The first magnet bracket 22 and the active magnet 23 at the front end of the motor output shaft will rotate together with the motor output shaft. Since there is a magnetic coupling between the active magnet 23 and the driven magnet 25, the rotation of the active magnet 23 will drive the driven magnet 25 to rotate synchronously. Thus, the driven magnet 25 will drive the connecting shaft 26 to rotate. The rotation of the connecting shaft 26 will then drive the brush head 4 to rotate. The rotation of the brush head 4 will drive the cleaning part 5 to rotate, thereby realizing the cleaning function of the toothbrush.

[0031] In this process, the sealing isolation sleeve 31, sealing slot 32, sealing insert 35, and sealing block 34 play a crucial role. They completely enclose the second magnet support 24 and the driven magnet 25 inside, forming a sealed space with the inner wall of the brush handle body 11. This prevents external moisture, saliva, toothpaste residue, etc., from contacting the transmission mechanism, let alone penetrating the drive motor 21 and other components inside the brush handle body 11. At the same time, since magnetic force can penetrate non-magnetic materials, the sealing isolation sleeve 31 is made of non-magnetic material, which will not affect the magnetic transmission between the active magnet 23 and the driven magnet 25. Thus, while hiding the motor output shaft, it ensures effective power transmission. The magnetic coupling transmission method avoids the wear and noise problems of gears, couplings, and other components in traditional mechanical transmission. The transmission process is smooth and reliable, and it has an overload protection function. When the brush head 4 is subjected to excessive resistance, the active magnet 23 and the driven magnet 25 will slip, protecting the drive motor 21 from damage.

[0032] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electric toothbrush with a concealed motor output shaft, characterized in that: The brush handle assembly includes a brush handle assembly (1), a connecting assembly (3), and a brush head (4). The connecting assembly (3) is used to connect the brush handle assembly (1) and the brush head (4). The brush handle assembly (1) includes a brush handle body (11) with a hollow internal structure. The brush head (4) is provided with a cleaning part (5). The brush handle body (11) is provided with a driving mechanism (2) for driving the brush head (4) and the cleaning part (5). The driving mechanism (2) includes a drive motor (21), a first transmission assembly, and a second transmission assembly.

2. The electric toothbrush with a concealed motor output shaft according to claim 1, characterized in that: The drive motor (21) is fixedly installed inside the brush handle body (11) by the mounting base (13). The motor output shaft extends horizontally forward. The first transmission component includes an active magnet (23) and a first magnet bracket (22). The first magnet bracket (22) is fixedly installed at the front end of the motor output shaft and rotatably connected to the brush handle body (11). The active magnet (23) is fixedly embedded in the front end face of the first magnet bracket (22).

3. The electric toothbrush with a concealed motor output shaft according to claim 2, characterized in that: The second transmission assembly includes a driven magnet (25) and a second magnet bracket (24). The second magnet bracket (24) is rotatably installed inside the brush handle body (11). The driven magnet (25) is fixedly embedded in the rear end face of the second magnet bracket (24). The driven magnet (25) and the active magnet (23) are arranged opposite to each other, and their magnetic poles are matched. The transmission is achieved through magnetic coupling. A connecting shaft (26) is also provided on the driven magnet (25). One end of the connecting shaft (26) extends out of the brush handle body (11) and is detachably connected to the connecting assembly (3).

4. The electric toothbrush with a concealed motor output shaft according to claim 3, characterized in that: The connecting component (3) includes a sealing isolation sleeve (31) rotatably disposed on the top of the brush handle body (11), the sealing isolation sleeve (31) having a sealing slot (32) and the sealing isolation sleeve (31) being made of a non-magnetic material.

5. The electric toothbrush with a concealed motor output shaft according to claim 4, characterized in that: The connecting assembly (3) also includes a connecting seat (33), a sealing block (34) is fixedly connected to the bottom of the connecting seat (33), a sealing insert (35) matching the size of the sealing slot (32) is provided on the sealing block (34), and a connecting hole (36) that cooperates with the connecting shaft (26) is also provided at the bottom of the connecting seat (33).

6. The electric toothbrush with a concealed motor output shaft according to claim 4, characterized in that: The brush handle assembly (1) also includes a battery and a control circuit board (12) located inside the brush handle body (11). The battery is electrically connected to the control circuit board (12), and the control circuit board (12) is electrically connected to the drive motor (21). A switch button (14) is provided on the control circuit board (12). The switch button (14) protrudes from the surface of the brush handle body (11) and is used to control the opening and closing of the electric toothbrush.

7. The electric toothbrush with a concealed motor output shaft according to claim 5, characterized in that: The brush handle body (11) is also provided with a charging interface (15) at the rear end. The charging interface (15) is electrically connected to the control circuit board (12) and is used to charge the battery.

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