Electric toothbrush driving assembly and electric toothbrush

Abstract

An electric toothbrush driving assembly comprises a first magnetic part and a second magnetic part, the first magnetic part is in transmission connection with an output shaft, the second magnetic part can be driven by a driving motor to rotate, and the first magnetic part can drive a toothbrush head body to rotate under magnetic attraction of the second magnetic part. According to the electric toothbrush driving assembly, non-contact power transmission is achieved in the two independent cavities through the first magnetic part and the second magnetic part according to the principle that opposite magnetic poles attract each other, power from the driving motor is transmitted to the output shaft, and transmission noise is effectively reduced; and the motor stalling phenomenon generated when the toothbrush head bears large load or resistance is also avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electric toothbrushes, in particular to an electric toothbrush drive assembly and an electric toothbrush. Background Art

[0002] Traditional electric toothbrushes use a motor and transmission mechanism to drive the brush head to oscillate for brushing. This transmission mechanism typically employs a linkage or gear-driven mechanism, converting the motor's 360-degree rotation into a repetitive oscillation. These transmission mechanisms inevitably generate noise during operation, impacting the user experience. Furthermore, these transmission structures pose potential risks, such as motor stalling, when the brush head is subjected to heavy loads or resistance, shortening its lifespan. Summary of the Invention

[0003] The utility model provides an electric toothbrush drive assembly that reduces transmission noise and increases the service life of the motor. The drive assembly includes a first magnetic part and a second magnetic part. The first magnetic part is connected to the output shaft in a transmission manner. The second magnetic part can rotate under the drive of the drive motor. The first magnetic part can drive the toothbrush head body to rotate under the magnetic attraction of the second magnetic part.

[0004] Furthermore, the first magnetic part and the second magnetic part are respectively arranged in independent cavities composed of a first shell and a second shell, and the second shell is arranged below the first shell and is fixedly connected to the first shell as a whole.

[0005] Furthermore, it also includes an elastic part, which is used to store elastic force during the period when the first magnetic part rotates from the first position to the second position. The elastic part is also used to release the elastic force when the first magnetic part rotates to the second position, so that the first magnetic part rebounds from the second position to the first position.

[0006] Furthermore, it also includes a first mounting seat, which is rotatably arranged in the first shell, the first elastic part is embedded in the first mounting seat, and the output shaft passes through the center of the first mounting seat and is fixedly connected to the first mounting seat as a whole.

[0007] Furthermore, the first magnetic portion includes a first magnetic block and a second magnetic block, and the first magnetic block and the second magnetic block are symmetrically arranged at two ends of the first mounting seat with the output shaft as the axis.

[0008] Furthermore, the lower portion of the output shaft is located in the first shell, the upper portion of the output shaft extends out of the first shell from the top of the first shell, and the upper portion of the output shaft is fixedly connected to the toothbrush head body as a whole.

[0009] Furthermore, it also includes a second mounting base, which is rotatably arranged in the second shell, the second magnetic part is arranged and embedded in the second mounting base, and the drive motor is passed through the center of the second mounting base and is fixedly connected to the second mounting base as a whole.

[0010] Furthermore, the second magnetic portion includes a third magnetic block and a fourth magnetic block, and the third magnetic block and the fourth magnetic block are symmetrically arranged at two ends of the second mounting seat with the driving motor as the axis.

[0011] Furthermore, it includes a third shell, which is arranged below the second shell and is fixedly connected to the second shell as a whole, the lower part of the drive motor is arranged in the third shell, the upper part of the drive motor extends from the top of the third shell out of the third shell and into the second shell, and the upper part of the drive motor is fixedly connected to the second mounting base as a whole.

[0012] Furthermore, the present invention also includes an electric toothbrush, which includes the aforementioned electric toothbrush drive assembly.

[0013] The electric toothbrush drive assembly provided by the utility model realizes contactless power transmission by utilizing the principle of attraction between opposite magnetic poles through the first magnetic part and the second magnetic part in two independent cavities, transmits the power from the drive motor to the output shaft, effectively reduces transmission noise, and avoids the motor stalling phenomenon caused by the toothbrush head being subjected to a large load or resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the electric toothbrush drive assembly provided by the present utility model.

[0015] Figure 2 This is a CC sectional view of the electric toothbrush drive assembly in the present invention.

[0016] Figure 3 This is a BB sectional view of the electric toothbrush drive assembly in the present invention.

[0017] Figure 4 This is an AA sectional view of the electric toothbrush drive assembly in the present invention. DETAILED DESCRIPTION

[0018] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the present invention is described in detail below with reference to the accompanying drawings and preferred embodiments.

[0019] It should be noted that the terms "first", "second", "third", "fourth", etc. in the description and claims of the present utility model are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0020] See also Figures 1 to 2 The electric toothbrush drive assembly provided by the present invention includes a first magnetic part 1 and a second magnetic part 2. The first magnetic part 1 is transmission-connected to the output shaft 3. The second magnetic part 2 can rotate under the drive of the drive motor 4. The first magnetic part 1 can drive the toothbrush head body to rotate under the magnetic attraction of the second magnetic part 2. Specifically, in this embodiment, the first magnetic part 1 and the second magnetic part 2 are attracted to each other by opposite charges. The first magnetic part 1 and the second magnetic part 2 are respectively arranged in independent cavities composed of a first shell 5 and a second shell 6. The second shell 6 is arranged below the first shell 5 and is fixedly connected to the first shell 5 as a whole. The upper part of the output shaft 3 is fixedly connected to the toothbrush head body, and the lower part of the output shaft 3 is arranged in the first shell 5; the lower part of the drive motor 4 is arranged in the third shell 9. The third shell 9 is located below the second shell 6 and is fixedly connected to the second shell 6 as a whole. The upper part of the drive motor 4 extends into the second shell 6 and is transmission-connected to the second magnetic part 2. The first magnetic part 1 and the second magnetic part 2 in the utility model can realize contactless power transmission in two independent cavities by utilizing the principle of attraction between opposite magnetic poles, and transmit the power from the driving motor 4 to the output shaft 3, and then transmit it to the toothbrush head body through the output shaft 3, thereby effectively reducing the transmission noise and avoiding the motor stalling phenomenon caused by the toothbrush head being subjected to a large load or resistance.

[0021] Furthermore, the electric toothbrush drive assembly of the present invention also includes a fourth housing 8, which is disposed below the second housing 6 and is integrally connected to the second housing 6. A battery 81 is disposed within the fourth housing 8. Specifically, in this embodiment, the first housing 5, the second housing 6, the third housing 9, and the fourth housing 8 are disposed sequentially from top to bottom, and are integrally connected in pairs. The third housing 9 and the fourth housing 8 are configured as user-handheld portions. The second magnetic portion 2 within the second housing 6 rotates under the drive of the drive motor 4. During rotation, the second magnetic portion 2 does not come into direct contact with the first magnetic portion 1 within the first housing 5. Therefore, the only noise generated by the electric toothbrush drive assembly of the present invention during operation is the sound of the toothbrush head body rotating and the drive motor 4 rotating. The magnetic transmission between the first magnetic portion 1 and the second magnetic portion 2 is silent. The transmission vibration and force load generated by the electric toothbrush drive assembly of the present invention during operation are isolated between the first magnetic portion 1 and the second magnetic portion 2, providing an excellent user experience.

[0022] Please also refer to Figure 3Furthermore, the electric toothbrush drive assembly of the present invention further includes an elastic portion 7, which is connected to the first housing 5 and the first magnetic portion 1, respectively. The elastic portion 7 is used to store elastic force during the period when the first magnetic portion 1 rotates from the first position to the second position. The elastic portion 7 is also used to release the elastic force when the first magnetic portion 1 rotates to the second position, so that the first magnetic portion 1 rebounds from the second position to the first position. Specifically, in this embodiment, the elastic portion 7 is a return spring, which is wound around the output shaft 3. When the first magnetic portion 1 is in the first position, the elastic portion 7 is unloaded. During the period when the first magnetic portion 1 rotates from the first position to the second position, the elastic portion 7 bears a load and stores elastic force. The second position is set as a position where the elastic portion 7 releases the elastic force. That is, when the first magnetic portion 1 is in the second position, the load on the elastic portion 7 reaches its maximum, and the elastic portion 7 releases the elastic force to rebound the first magnetic portion 1 to the first position. The first magnetic portion 1 is achieved by the elastic portion 7 to achieve high-frequency swing between two specified positions. During operation, the output shaft 3 transmits the transmission as high-frequency repeated swing of the toothbrush head body.

[0023] Furthermore, the electric toothbrush drive assembly of the present invention further includes a first mounting base 51, which is rotatably disposed within the first housing 5. The first magnetic portion 1 is embedded within the first mounting base 51, and the output shaft 3 passes through the center of the first mounting base 51 and is integrally connected to the first mounting base 51. Specifically, in this embodiment, the first magnetic portion 1 includes a first magnetic block 1a and a second magnetic block 1b, which are symmetrically disposed at opposite ends of the first mounting base 51 with the output shaft 3 as the axis. The first mounting base 51 includes a rotating shaft sleeve 511 located in the middle thereof and two fan-shaped blades 512 symmetrically arranged with the sleeve as the axis. The rotating shaft sleeve 511 is fixedly connected to the output shaft 3 as a whole, and the two fan-shaped blades 512 are respectively fixedly connected to the rotating shaft sleeve 511 as a whole. The first magnetic block 1a and the second magnetic block 1b are two circular magnets, which are respectively installed in the two fan-shaped blades 512. The first magnetic part 1 can drive the fan-shaped blades 512 to rotate under the magnetic attraction of the second magnetic part 2, thereby driving the output shaft 3 and the toothbrush head body to rotate.

[0024] Please also refer to Figure 4Furthermore, the electric toothbrush drive assembly of the present invention also includes a second mounting base 61, which is rotatably disposed in the second housing 6, the second magnetic portion 2 is disposed and embedded in the second mounting base 61, and the drive motor 4 is disposed in the center of the second mounting base 61 and is fixedly connected to the second mounting base 61 as a whole. Specifically, in this embodiment, the second magnetic portion 2 includes a third magnetic block 2a and a fourth magnetic block 2b, which are symmetrically disposed at both ends of the second mounting base 61 with the drive motor 4 as the axis. The first mounting base 51 is a disc-shaped flange with two mounting holes. The third magnetic block 2a and the fourth magnetic block 2b are respectively mounted in the mounting holes, and the mounting holes are respectively provided at positions on the disc-shaped flange corresponding to the first magnetic block 1a and the second magnetic block 1b. That is, the third magnetic block 2a and the fourth magnetic block 2b are respectively disposed above and below the first magnetic block 1a and the second magnetic block 1b and are respectively used to attract the first magnetic block 1a and the second magnetic block 1b.

[0025] Furthermore, in a preferred embodiment of the present invention, the power output by the drive motor 4 is a 360° rotation, meaning that the second mounting base 61 and the second magnetic portion 2 thereon can rotate 360° under the drive motor 4. Therefore, when the electric toothbrush drive assembly of the present invention is in operation, the second magnetic portion 2 attracts the first magnetic portion 1 located in the first position to rotate. When the first magnetic portion 1 rotates to the second position along with the second magnetic portion 2, the elastic force stored in the elastic portion 7 is greater than the magnetic attraction exerted by the second magnetic portion 2 on the first magnetic portion 1. Therefore, the first magnetic portion 1 is rebounded back to the first position by the elastic portion 7, and the second magnetic portion 2 continues to rotate under the drive motor 4. When the second magnetic portion 2 rotates to the second rotation, the second magnetic portion 2 again attracts the first magnetic portion 1 located in the first position, causing it to rotate to the second position. The electric toothbrush drive assembly of the present invention converts the 360° rotation output by the drive motor 4 into high-frequency reciprocating oscillation through the first magnetic portion 1, the second magnetic portion 2, and the elastic portion 7, thereby achieving the basic function of an electric toothbrush.

[0026] Furthermore, the present invention also includes an electric toothbrush, which includes the aforementioned electric toothbrush drive assembly.

[0027] In summary, the electric toothbrush drive assembly provided by the utility model realizes contactless power transmission by utilizing the principle of attraction between opposite magnetic poles through the first magnetic part and the second magnetic part in two independent cavities, transmits the power from the drive motor to the output shaft, effectively reduces the transmission noise, and avoids the motor stalling phenomenon caused by the toothbrush head being subjected to a large load or resistance.

[0028] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An electric toothbrush drive assembly, characterized in that: The toothbrush comprises a first magnetic part (1) and a second magnetic part (2), wherein the first magnetic part (1) is in transmission connection with an output shaft (3), the second magnetic part (2) can rotate under the drive of a drive motor (4), and the first magnetic part (1) can drive the toothbrush head body to rotate under the magnetic attraction of the second magnetic part (2).

2. The electric toothbrush drive assembly according to claim 1, wherein: The first magnetic part (1) and the second magnetic part (2) are respectively arranged in independent cavities composed of a first shell (5) and a second shell (6); the second shell (6) is arranged below the first shell (5) and is fixedly connected to the first shell (5) as a whole.

3. The electric toothbrush drive assembly according to claim 2, wherein: The invention also includes an elastic part (7), wherein the elastic part (7) is used to store elastic force during the period when the first magnetic part (1) rotates from the first position to the second position, and the elastic part (7) is also used to release the elastic force when the first magnetic part (1) rotates to the second position, so that the first magnetic part (1) rebounds from the second position to the first position.

4. The electric toothbrush drive assembly according to claim 3, wherein: The first mounting seat (51) is rotatably arranged in the first shell (5), the elastic portion (7) is embedded in the first mounting seat (51), and the output shaft (3) is passed through the center of the first mounting seat (51) and is fixedly connected to the first mounting seat (51) as a whole.

5. The electric toothbrush drive assembly according to claim 4, wherein: The first magnetic part (1) comprises a first magnetic block (1a) and a second magnetic block (1b); the first magnetic block (1a) and the second magnetic block (1b) are symmetrically arranged at two ends of the first mounting seat (51) with the output shaft (3) as an axis.

6. The electric toothbrush drive assembly according to claim 2, wherein: The lower part of the output shaft (3) is located in the first shell (5), the upper part of the output shaft (3) extends out of the first shell (5) from the top of the first shell (5), and the upper part of the output shaft (3) is fixedly connected to the toothbrush head body as a whole.

7. The electric toothbrush drive assembly according to claim 2, wherein: The invention also includes a second mounting seat (61), wherein the second mounting seat (61) is rotatably arranged in the second shell (6), the second magnetic portion (2) is arranged and embedded in the second mounting seat (61), and the drive motor (4) is passed through the center of the second mounting seat (61) and is fixedly connected to the second mounting seat (61) as a whole.

8. The electric toothbrush drive assembly according to claim 7, wherein: The second magnetic part (2) comprises a third magnetic block (2a) and a fourth magnetic block (2b), and the third magnetic block (2a) and the fourth magnetic block (2b) are symmetrically arranged at two ends of the second mounting seat (61) with the drive motor (4) as an axis.

9. The electric toothbrush drive assembly according to claim 7, wherein: The invention comprises a third shell (9), wherein the third shell (9) is arranged below the second shell (6) and is fixedly connected to the second shell (6) as a whole, the lower part of the drive motor (4) is arranged in the third shell (9), the upper part of the drive motor (4) extends from the top of the third shell (9) outside the third shell (9) and extends into the second shell (6), and the upper part of the drive motor (4) is fixedly connected to the second mounting seat (61) as a whole.

10. An electric toothbrush, characterized in that: It comprises the electric toothbrush drive assembly according to any one of claims 1 to 9.

Images