Multi-axial movement toothbrush

Abstract

The utility model relates to the technical field of toothbrushes, and provides a multi-axial movement toothbrush which comprises a toothbrush handle and a toothbrush head connecting shaft connected with the toothbrush handle. The toothbrush handle cavity comprises a compression length motor cavity and a battery cavity which are arranged in the length direction of the toothbrush handle, the compression length motor cavity contains a compression length motor, the battery cavity is used for containing a toothbrush battery, the compression length motor comprises a transmission shaft rod, and the transmission shaft rod extends in the longitudinal direction of the compression length motor; the swing driving unit is mounted in the compression length motor; and the telescopic driving unit is mounted in the compression length motor. According to the electric toothbrush, the multi-dimensional cleaning action of the toothbrush head is achieved, meanwhile, the space layout in the handle is optimized, and the cruising ability of the electric toothbrush is improved under the condition that the length of the handle is kept unchanged.

Description

Technical Field

[0001] This utility model relates to the field of toothbrush technology, specifically a multi-axial motion toothbrush. Background Technology

[0002] Existing multi-axis motion toothbrushes typically use two motors to move the brush head's connecting shaft vertically and horizontally. For ease of use, the handle length of current multi-axis motion toothbrushes has largely become a consensus, meaning it's essentially a fixed value. In this case, the two motors inside the toothbrush occupy a significant amount of space, resulting in limited space for the battery. Therefore, existing multi-axis motion toothbrushes typically use 18500 batteries. However, the battery life of 18500 batteries is insufficient, and forcibly adding more batteries would cause the handle length to become unsuitable for practical use. Utility Model Content

[0003] In order to help solve the problem of insufficient battery life caused by the large space occupied by the motor in existing multi-axial motion toothbrushes, this application provides a multi-axial motion toothbrush.

[0004] The multi-axial motion toothbrush provided in this application adopts the following technical solution:

[0005] A multi-axial motion toothbrush includes a toothbrush handle and a toothbrush head connecting shaft connected to the toothbrush handle. The toothbrush handle has an internal cavity, which includes a compression length motor cavity and a battery cavity arranged along the length of the toothbrush handle. The compression length motor cavity houses a compression length motor, and the battery cavity houses a toothbrush battery. When the diameter of the toothbrush handle is less than 30 mm and the length of the multi-axial motion toothbrush is less than 265 mm, the length of the battery cavity is greater than or equal to 65 mm. One end of the compression length motor is connected to the toothbrush head connecting shaft, and the other end is electrically connected to the toothbrush battery. One end of the toothbrush head connecting shaft is embedded in the toothbrush handle cavity and connected to the compression length motor, while the other end extends out of the toothbrush handle cavity.

[0006] The compressed length motor includes:

[0007] A drive shaft extends longitudinally along the compression length of the motor and is used to connect the toothbrush head connecting shaft;

[0008] A swing drive unit is installed inside the compression length motor and is used to control the rotation of the transmission shaft.

[0009] A telescopic drive unit is installed inside the compression length motor and is used to control the extension and retraction of the transmission shaft.

[0010] Preferably, the compression length motor further includes:

[0011] The housing has a top cover and a bottom cover, which respectively close both ends of the housing. The drive shaft passes through the top cover, the interior of the housing, and the bottom cover.

[0012] Preferably, a partition is provided inside the toothbrush handle cavity, the partition forming the compression length motor cavity and the battery cavity. The outer sides of the top and bottom covers are provided with slots, and the inner wall of the compression length motor cavity is provided with a locking block that mates with the slots. The toothbrush head connecting shaft and the transmission shaft are connected by a linear bearing. A PCB board is provided on one side of the toothbrush handle cavity, and a charging base is provided at the bottom of the battery cavity.

[0013] Preferably, the swing drive unit is installed inside the housing and extends longitudinally along the housing. The swing drive unit includes a first fixed iron core and a first winding bracket disposed on the first fixed iron core. A first moving iron core is tightly attached to the drive shaft, and a first group of magnets is provided on the outer periphery of the first moving iron core.

[0014] Preferably, the telescopic drive unit is installed inside the housing and adjacent to the swing drive unit. The telescopic drive unit includes a central fixed iron core and a winding bracket mounted on the central fixed iron core. A middle section moving iron core and a tail section moving iron core are also tightly attached to the drive shaft. The middle section moving iron core and the tail section moving iron core are respectively located on both sides of the winding bracket, and the middle section moving iron core and the tail section moving iron core are respectively provided with a middle section magnet group and a tail section magnet group.

[0015] Preferably, the first group of magnets consists of four first magnets, and the first group of magnets is evenly distributed circumferentially on the outer wall of the first section of moving iron core;

[0016] The middle section magnet group and the tail section magnet group are each composed of four second magnets and four third magnets, respectively. The second magnets and the third magnets are evenly distributed circumferentially on the outer walls of the middle section moving iron core and the tail section moving iron core.

[0017] Preferably, the compression length motor further includes a lower fixed iron core, which is disposed below the middle fixed iron core;

[0018] An additional moving iron core and a bottom moving iron core are also fixed on the transmission shaft. An additional moving iron core and a bottom moving iron core are respectively provided on the additional moving iron core and the bottom moving iron core.

[0019] Preferably, the additional magnet group and the bottom magnet group are each composed of four fourth magnets and four fifth magnets, and the fourth magnets and the fifth magnets are evenly distributed circumferentially on the outer walls of the additional moving iron core and the bottom moving iron core, respectively.

[0020] Preferably, the length of the multi-axial motion toothbrush is less than 265mm, and the straight-line distance between the top cap and the bottom cap is 43.6mm.

[0021] In summary, this multi-axial motion toothbrush, through its innovative compressed-length motor design, achieves multi-dimensional cleaning motions on the toothbrush head connecting shaft. Simultaneously, it optimizes the spatial layout of the motor and battery, allowing for a larger-capacity 18650 battery while maintaining the same handle length, significantly improving the multi-axial motion toothbrush's battery life. Furthermore, the motor's stability, durability, and efficiency are all significantly improved, enhancing the user experience. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of one embodiment of a multi-axial motion toothbrush according to this application;

[0023] Figure 2 for Figure 1 The diagram shows the structure of the compression length motor in the embodiment shown.

[0024] Reference numerals: 1-Toothbrush head connecting shaft; 2-Toothbrush handle; 3-Top cover; 4-Drive shaft; 5-Compression length motor; 6-Bottom cover; 7-Toothbrush battery; 8-Linear bearing; 9-PCB board; 10-Charging base; 11-Baffle; 12-Slot; 13-First fixed iron core; 14-First winding bracket; 15-Outer shell; 16-Middle fixed iron core; 17-Middle winding bracket; 18-Lower fixed iron core; 19-Lower winding bracket; 20-First section moving iron core; 21-First group of magnets; 22-Middle section moving iron core; 23-Middle section magnet group; 24-Tail section moving iron core; 25-Tail section magnet group; 26-Additional moving iron core; 27-Additional magnet group; 28-Bottom magnet group; 29-Bottom moving iron core Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings. The structure and principle of the present invention are very clear to those skilled in the art. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0026] Figure 1 This is a schematic diagram of the structure of one embodiment of a multi-axial motion toothbrush according to this application. Figure 2 for Figure 1A schematic diagram of the compression length motor 5 in the illustrated embodiment. (Combined with...) Figure 1 and Figure 2 It is understood that the multi-axial motion toothbrush includes a toothbrush handle 2 and a toothbrush head connecting shaft 1 connected to the toothbrush handle 2. The toothbrush handle 2 has a toothbrush handle cavity inside, which includes a compression length motor cavity and a battery cavity arranged along the length of the toothbrush handle 2. The compression length motor cavity houses a compression length motor 5, and the battery cavity houses a toothbrush battery 7. One end of the compression length motor 5 is connected to the toothbrush head connecting shaft 1, and the other end is electrically connected to the toothbrush battery 7. One end of the toothbrush head connecting shaft 1 is embedded in the toothbrush handle cavity and connected to the compression length motor 5, while the other end extends out of the toothbrush handle cavity. In this embodiment, the toothbrush battery can be an 18650 battery. When the diameter of the toothbrush handle 2 is less than 30mm and the length of the multi-axial motion toothbrush is less than 265mm, the length of the battery cavity in this application is greater than or equal to 65mm, which is sufficient to accommodate an 18650 battery with a length of 65mm.

[0027] In this embodiment, the compression length motor 5 may include a drive shaft 4, a swing drive unit, and a telescopic drive unit. The drive shaft 4 extends longitudinally along the compression length motor 5 and is used to connect to the toothbrush head connecting shaft 1; the swing drive unit is installed inside the compression length motor 5 and is used to control the left and right rotation of the drive shaft 4; the telescopic drive unit is installed inside the compression length motor 5 and is used to control the up and down extension of the drive shaft 4.

[0028] A partition 11 is provided inside the toothbrush handle cavity. The partition 11 is used to form the compression length motor cavity and the battery cavity. The outer side of the top cover 3 and the bottom cover 6 is provided with a slot 12. The inner wall of the compression length motor cavity is provided with a locking block that cooperates with the slot 12. The toothbrush head connecting shaft 1 and the transmission shaft are connected by a linear bearing 8. A PCB board 9 is provided on one side of the toothbrush handle cavity. A charging base 10 is provided at the bottom of the battery cavity.

[0029] Achieving multiple motions through a single compressed-length motor 5 reduces the number of motors, providing more space for the battery and enabling the use of a larger-capacity 18650 battery 7, thus improving the battery life of the multi-axial motion toothbrush. Simultaneously, the rational division of the internal space of the toothbrush handle ensures both effective motor installation and efficient battery placement, optimizing the product structure. Furthermore, the toothbrush head connecting shaft 1 enables complex cleaning actions, improving cleaning efficiency and user experience.

[0030] In addition, the compression length motor 5 also includes a housing 15, which has a top cover 3 and a bottom cover 6. The top cover 3 and the bottom cover 6 respectively seal both ends of the housing 15. The drive shaft 4 passes through the top cover 3, the interior of the housing 15, and the bottom cover 6. The drive shaft 4 is connected to the top cover 3 via a top bearing assembly, and to the bottom cover 6 via a bottom bearing assembly. The use of bearing assemblies ensures the stability and durability of the drive shaft 4 during high-speed operation, reduces wear and noise, and the top and bottom covers effectively prevent water or dust from entering the motor, improving the motor's waterproof and dustproof rating and extending its service life. The design of the housing 15 makes the overall structure of the motor more compact, facilitating its installation inside the toothbrush handle.

[0031] The swing drive unit is installed inside the housing 15 and extends longitudinally along the housing 15. The swing drive unit includes a first fixed iron core 13, a first winding support 14 disposed on the first fixed iron core 13, and a first coil group wound on the first winding support 14. A first moving iron core 20 is tightly attached to the drive shaft 4, and a first group of magnets 21 magnetically coupled to the first coil group is provided on the outer periphery of the first moving iron core 20. Through the principle of electromagnetic induction, the left and right swing angle and frequency of the drive shaft 4 are precisely controlled to achieve precise cleaning action. At the same time, the optimized design of the magnet group and the coil group improves the conversion efficiency of electrical energy to mechanical energy and reduces energy consumption.

[0032] The telescopic drive unit is installed inside the housing 15 and adjacent to the swing drive unit. The telescopic drive unit includes a central fixed iron core 16, a winding support 17 mounted on the central fixed iron core 16, and a second coil group wound on the winding support 17. A middle section moving iron core 22 and a tail section moving iron core 24 are also tightly attached to the drive shaft 4. The middle section moving iron core 22 and the tail section moving iron core 24 are located on the upper and lower sides of the winding support 17, respectively, and the middle section moving iron core 22 and the tail section moving iron core 24 are respectively provided with a middle section magnet group 23 and a tail section magnet group 25 magnetically coupled to the second coil group. The telescopic drive unit works independently of the swing drive unit, realizing the vertical extension and retraction of the drive shaft 4, increasing cleaning flexibility and coverage.

[0033] The first magnet group 21 consists of four first magnets, which are evenly distributed circumferentially on the outer wall of the first section moving iron core 20. The first coil group consists of the first and second longest coils symmetrically arranged on the first winding support 14. The middle section magnet group 23 and the tail section magnet group 25 consist of four second magnets and four third magnets, respectively. The second and third magnets are evenly distributed circumferentially on the outer walls of the middle section moving iron core 22 and the tail section moving iron core 24, respectively. The second coil group consists of the first, second, third, and fourth short coils arranged at equal angles circumferentially on the middle winding support 17. The uniform distribution of the magnet groups ensures the stability and uniformity of the magnetic field, improving the smooth operation of the motor. The specific connection method of the coil groups reduces electromagnetic interference and improves the response speed and efficiency of the motor.

[0034] The compression length motor 5 also includes a lower fixed iron core 18, which is located below the middle fixed iron core 16. The lower fixed iron core 18 is provided with a lower winding bracket 19 and a third coil group. An additional moving iron core 26 and a bottom moving iron core 29 are also fixed on the transmission shaft 4. The additional moving iron core 26 and the bottom moving iron core 29 are respectively provided with an additional magnet group 27 and a bottom magnet group 28 that interact with the third coil group. The additional magnet group 27 and the bottom magnet group 28 are respectively composed of four fourth magnets and four fifth magnets. The fourth magnets and the fifth magnets are evenly distributed circumferentially on the outer walls of the additional moving iron core 26 and the bottom moving iron core 29. The third coil group is composed of a fifth short coil, a sixth short coil, a seventh short coil, and an eighth short coil arranged circumferentially at equal angles on the lower winding bracket 19. The additional magnet group and coil group provide stronger driving force for the motor, enabling the toothbrush head connecting shaft 1 to clean teeth more powerfully, while also reserving space for possible additional functions in the future (such as vibration, massage, etc.), increasing the product's scalability.

[0035] In the second coil group, the head of the first short coil is connected to the head of the second short coil, the tail of the second short coil is connected to the tail of the third short coil, and the tail of the fourth short coil is connected to the tail of the first short coil. In the third coil group, the head of the fifth short coil is connected to the head of the sixth short coil, the tail of the sixth short coil is connected to the tail of the seventh short coil, the tail of the eighth short coil is connected to the tail of the fifth short coil, the head of the fourth short coil is connected to the head of the eighth short coil, and the head of the third short coil is connected to the head of the seventh short coil. This specific connection method optimizes the current flow path in the coils, reduces energy loss, and improves motor efficiency. Furthermore, the rational coil connection method simplifies circuit design and reduces manufacturing costs.

[0036] Furthermore, the length of the multi-axial motion toothbrush of this application is less than 265 mm, the straight-line distance between the top cover 3 and the bottom cover 6 is 43.6 mm, and the length of the top bearing assembly and the bottom bearing assembly is 7 mm.

Claims

1. A multi-axial motion toothbrush, characterized in that, The multi-axial motion toothbrush includes a toothbrush handle and a toothbrush head connecting shaft connected to the toothbrush handle. The toothbrush handle has an internal cavity, which includes a compression length motor cavity and a battery cavity arranged along the length of the toothbrush handle. The compression length motor cavity houses the compression length motor, and the battery cavity houses the toothbrush battery. When the diameter of the toothbrush handle is less than 30mm and the length of the multi-axial motion toothbrush is less than 265mm, the length of the battery cavity is greater than or equal to 65mm. One end of the compression length motor is connected to the toothbrush head connecting shaft, and the other end is electrically connected to the toothbrush battery. One end of the toothbrush head connecting shaft is embedded in the toothbrush handle cavity and connected to the compression length motor, while the other end extends out of the toothbrush handle cavity. The compressed length motor includes: A drive shaft extends longitudinally along the compression length of the motor and is used to connect the toothbrush head connecting shaft; A swing drive unit is installed inside the compression length motor and is used to control the rotation of the transmission shaft. A telescopic drive unit is installed inside the compression length motor and is used to control the extension and retraction of the transmission shaft.

2. The multi-axial motion toothbrush according to claim 1, characterized in that, The compressed length motor also includes: The housing has a top cover and a bottom cover, which respectively close both ends of the housing. The drive shaft passes through the top cover, the interior of the housing, and the bottom cover.

3. The multi-axial motion toothbrush according to claim 2, characterized in that, A partition is provided inside the toothbrush handle cavity, which forms the compression length motor cavity and the battery cavity. The outer sides of the top cover and the bottom cover are provided with slots. The inner wall of the compression length motor cavity is provided with a locking block that cooperates with the slots. The toothbrush head connecting shaft and the transmission shaft are connected by a linear bearing. A PCB board is provided on one side of the toothbrush handle cavity, and a charging base is provided at the bottom of the battery cavity.

4. The multi-axial motion toothbrush according to claim 3, characterized in that, The swing drive unit is installed inside the housing and extends longitudinally along the housing. The swing drive unit includes a first fixed iron core and a first winding bracket disposed on the first fixed iron core. A first moving iron core is tightly attached to the transmission shaft, and a first group of magnets is provided on the outer periphery of the first moving iron core.

5. The multi-axial motion toothbrush according to claim 4, characterized in that, The telescopic drive unit is installed inside the housing and adjacent to the swing drive unit. The telescopic drive unit includes a central fixed iron core and a winding bracket mounted on the central fixed iron core. A middle section moving iron core and a tail section moving iron core are also tightly attached to the transmission shaft. The middle section moving iron core and the tail section moving iron core are respectively located on both sides of the winding bracket, and the middle section moving iron core and the tail section moving iron core are respectively provided with a middle section magnet group and a tail section magnet group.

6. The multi-axial motion toothbrush according to claim 5, characterized in that, The first group of magnets consists of four first magnets, and the first group of magnets is evenly distributed circumferentially on the outer wall of the first section of moving iron core. The middle section magnet group and the tail section magnet group are each composed of four second magnets and four third magnets, respectively. The second magnets and the third magnets are evenly distributed circumferentially on the outer walls of the middle section moving iron core and the tail section moving iron core.

7. The multi-axial motion toothbrush according to claim 5, characterized in that, The compression length motor also includes a lower fixed iron core, which is disposed below the middle fixed iron core; An additional moving iron core and a bottom moving iron core are also fixed on the transmission shaft. An additional moving iron core and a bottom moving iron core are respectively provided on the additional moving iron core and the bottom moving iron core.

8. The multi-axial motion toothbrush according to claim 7, characterized in that, The additional magnet group and the bottom magnet group are respectively composed of four fourth magnets and four fifth magnets, and the fourth magnets and the fifth magnets are evenly distributed circumferentially on the outer walls of the additional moving iron core and the bottom moving iron core.

9. The multi-axial motion toothbrush according to claim 2, characterized in that, The length of the multi-axial motion toothbrush is less than 265mm, and the straight-line distance between the top cap and the bottom cap is 43.6mm.

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