Electric toothbrush movement

Abstract

The utility model provides an electric toothbrush machine core which comprises a machine core support and a machine core shell, a transmission assembly matched with a brush head is arranged at one end of the machine core support, a wireless charging assembly is arranged at the other end of the machine core support, a battery and an operation assembly are arranged between the transmission assembly and the wireless charging assembly, and the operation assembly comprises a main board and a key board. The transmission assembly comprises a transmission shaft and a motor, a first containing groove, a second containing groove and a third containing groove are formed in the machine core support, one end of the transmission shaft is connected with the motor, the other end of the transmission shaft is arranged outside the machine core support, the transmission shaft is sleeved with a machine core positioning piece, and a motor shaft sealing ring is arranged between the machine core support and the machine core positioning piece. The two sides of the movement support are provided with slots, one end of the movement shell corresponding to the transmission shaft is provided with an opening, the movement support is inserted into the movement shell, and the two sides of the movement positioning piece are provided with positioning convex blocks clamped with the movement shell. By adopting the technical scheme, the movement shell plays a role in protecting the movement bracket, and the waterproof performance is better.

Description

Technical Field

[0001] This utility model relates to the field of electric toothbrush technology, and specifically to an electric toothbrush mechanism. Background Technology

[0002] Existing electric toothbrushes contain a motor, typically installed inside the toothbrush handle. A drive shaft is connected to the motor's output shaft, extending from the handle and connecting to the brush head. This inevitably creates a gap at the junction of the handle and brush head. During use, moisture can easily accumulate in these gaps, fostering bacterial growth. To prevent water from entering the handle through these gaps, a waterproof structure is usually incorporated. However, existing waterproof structures in electric toothbrushes are often overly complex or ineffective, and they are prone to failure due to the rotation of the drive shaft over time. Utility Model Content

[0003] Based on the above problems, the purpose of this utility model is to provide an electric toothbrush motor.

[0004] To address the above problems, the following technical solution is provided: an electric toothbrush mechanism, comprising a mechanism support and a mechanism housing. One end of the mechanism support is provided with a transmission component that engages with the brush head, and the other end is provided with a wireless charging component. A battery and an operating component are disposed between the transmission component and the wireless charging component. The operating component includes a motherboard and a button board. The transmission component includes a drive shaft and a motor. The mechanism support is provided with a first receiving slot for accommodating the battery, a second receiving slot for accommodating the motherboard, and a third receiving slot for accommodating the motor. One end of the drive shaft is connected to the motor, and the other end is disposed outside the mechanism support. A mechanism positioning component is sleeved on the drive shaft. A motor shaft sealing ring is disposed between the mechanism support and the mechanism positioning component. Slots for engaging with the mechanism positioning component are provided on both sides of the mechanism support. The mechanism housing has an opening corresponding to one end of the drive shaft. The mechanism support is inserted into the mechanism housing. Positioning protrusions for engaging with the mechanism housing are provided on both sides of the mechanism positioning component.

[0005] By adopting the above technical solution, compared to existing electric toothbrush mechanisms that only include a bracket, where the bracket is connected to the toothbrush shell via a bottom cover fastener, and if wired charging is used, the bottom cover has a charging port requiring additional protective cover, this technical solution includes a core shell to protect the core bracket. Furthermore, the use of a wireless charging component ensures a fully enclosed bottom for better waterproofing, simpler and more convenient assembly with the toothbrush shell, and higher stability. The core positioning component, which snaps into the core bracket for quick and easy assembly, also ensures high stability. This simple structure facilitates quick assembly and maintains high stability.

[0006] The present invention further comprises: the motor shaft sealing ring being arranged in a multi-layered frustum shape; the mechanism bracket having a positioning protrusion at one end corresponding to the mechanism positioning component, which is adapted to the inner wall of the motor shaft sealing ring; the positioning protrusion having a through hole at its center for the transmission shaft to pass through; the motor shaft sealing ring having a through hole at its center for the transmission shaft to pass through; and the motor shaft sealing ring being fitted onto the positioning protrusion.

[0007] By adopting the above technical solution, the positioning protrusion facilitates the rapid assembly and positioning of the motor shaft seal ring. The motor shaft seal ring prevents moisture from entering the mechanism bracket through the drive shaft, further enhancing the waterproof performance of the mechanism.

[0008] The present invention further comprises: the positioning component of the mechanism includes an annular base sleeved on the motor shaft seal ring, one end of the annular base corresponding to the slot is provided with a locking part that engages with the slot, the positioning protrusion is provided on the outer periphery of the annular base, the outer periphery of the annular base is provided with an annular mounting groove, and an O-ring is provided in the annular mounting groove.

[0009] By adopting the above technical solution, the sealing performance between the drive shaft and the mechanism support is enhanced by pressing the motor shaft seal ring with the annular base, the snap-fit ​​part facilitates quick assembly, and the O-ring seal enhances the sealing performance between the mechanism support and the mechanism housing. Multiple waterproofing measures greatly enhance the waterproof performance of the mechanism.

[0010] The present invention further comprises: a mounting through hole in the middle of the annular base; the motor shaft sealing ring includes an abutting part that abuts against the inner wall of the annular base, a first protrusion disposed in the mounting through hole, and a second protrusion disposed outside the mechanism support; a stainless steel cover is provided on the second protrusion, the inner diameter of the stainless steel cover is adapted to the outer diameter of the second protrusion, and the outer diameter of the stainless steel cover is adapted to the diameter of the mechanism housing.

[0011] By adopting the above technical solution, the abutting part of the motor shaft seal ring abuts against the inner wall of the annular base of the core positioning component, and the core positioning component presses the motor shaft seal ring. The stainless steel cover is sleeved on the outside of the second protrusion, which facilitates quick assembly. At the same time, it blocks the gap between the mounting through hole and the first protrusion and the gap between the core positioning component and the core housing, further enhancing the waterproof and dustproof performance.

[0012] The present invention further comprises: the wireless charging component including a charging coil, double-sided foam adhesive, a permanent magnet, a charging PCB and a coil bracket for detachable connection with the mechanism bracket; the charging coil and the charging PCB are respectively attached to both sides of the double-sided foam adhesive; and the side of the charging PCB corresponding to the coil bracket is attached to the coil bracket with adhesive backing.

[0013] By adopting the above technical solution, double-sided foam adhesive ensures a stable connection between the charging coil and the charging PCB, facilitating rapid assembly and improving assembly efficiency. Simultaneously, the double-sided foam adhesive possesses excellent elasticity and shock absorption properties. With the charging coil and charging PCB respectively attached to their respective sides, it effectively buffers vibrations generated during electric toothbrush use, preventing loosening or damage to the connection between the charging coil and charging PCB due to vibration, thus improving the stability and reliability of the wireless charging component. The use of permanent magnets enhances the magnetic positioning effect between the electric toothbrush and the wireless charger, allowing the electric toothbrush to more accurately align with the charging position when placed on the wireless charger, improving charging efficiency. The side of the charging PCB corresponding to the coil support is adhered to the coil support using adhesive backing. This tight fit helps reduce electromagnetic interference, improving charging stability and efficiency. The overall structure is more compact, saves space, and offers high stability.

[0014] The present invention further comprises: a mounting boss is provided at one end of the mechanism bracket corresponding to the coil bracket; the mounting boss is provided with a receiving cavity for accommodating the permanent magnet; the coil bracket, the charging PCB, and the double-sided foam adhesive are respectively provided with positioning holes adapted to the mounting boss; the coil bracket, the charging PCB, and the double-sided foam adhesive are sleeved on the mounting boss through the positioning holes.

[0015] By adopting the above technical solution, the cavity facilitates the fixation of the permanent magnet, and the magnetic positioning prevents the electric toothbrush from shifting during charging, avoiding problems such as charging interruption or poor contact caused by displacement. The design of the mounting boss and positioning holes allows for precise positioning of the coil bracket, charging PCB, and double-sided foam adhesive during assembly. Using the mounting boss as a reference, each component is fitted onto the mounting boss through the positioning holes, ensuring accurate relative positions. This helps improve the overall performance of the wireless charging component and avoids problems such as reduced charging efficiency and unstable charging due to component position deviations. The cooperation between the mounting boss and positioning holes not only achieves positioning but also fixes each component. The coil bracket, charging PCB, and double-sided foam adhesive, fitted onto the mounting boss, form a tight connection with the core bracket, reducing relative movement and shaking between components. This robust fixing method helps improve the stability of the wireless charging component during the use of the electric toothbrush and reduces the risk of component loosening or damage due to vibration, collision, or other factors. The structural design of the mounting boss and positioning holes also creates a heat dissipation channel to some extent, which is beneficial for heat dissipation. The heat generated during charging can be transferred to the core support or other heat dissipation parts through these channels, preventing heat from accumulating inside the components and thus ensuring the normal operation and lifespan of the wireless charging components.

[0016] The present invention further comprises: mounting holes are provided on both sides of one end of the mechanism bracket corresponding to the coil bracket; and a plug-in part adapted to the mounting holes is provided on one end of the coil bracket corresponding to the mechanism bracket; the coil bracket and the mechanism bracket are engaged by being inserted into the mounting holes through the plug-in part.

[0017] By adopting the above technical solution and using a snap-fit ​​connection, no complicated tools are needed. The connection between the coil bracket and the mechanism bracket can be completed simply by aligning the snap-fit ​​part of the coil bracket with the mounting hole and inserting it. Ordinary workers can operate it proficiently after simple training, which greatly shortens the assembly time and improves production efficiency. When it is necessary to repair, replace parts or clean the wireless charging component, simply apply a certain amount of external force to pull the snap-fit ​​part out of the mounting hole to easily separate the coil bracket and the mechanism bracket, which facilitates subsequent operations. The snap-fit ​​design of the mounting hole and the snap-fit ​​part provides sufficient connection strength to ensure that the coil bracket and the mechanism bracket will not easily loosen or separate during daily use of the electric toothbrush. Even when the electric toothbrush is subjected to a certain degree of vibration or shaking, the two can still maintain a stable connection, ensuring the normal operation of the wireless charging function; this structure can resist torsional forces to a certain extent, preventing damage to the internal circuitry or affecting charging performance due to relative torsion between the coil support and the motor support caused by accidental collisions or improper operation; the snap-fit ​​structure itself occupies little space and does not increase the internal volume of the electric toothbrush, making the overall design of the electric toothbrush more compact, which is conducive to the rational layout of other components in a limited space, improving the overall performance and appearance design of the product. Attached Figure Description

[0018] Figure 1 This is a perspective view of the assembly and disassembly state of this utility model.

[0019] Figure 2 This is an exploded view of the mechanism support of this utility model.

[0020] Figure 3 This is an exploded view of the wireless charging component of this utility model.

[0021] Figure 4 This is a partial structural cross-sectional view of the present invention.

[0022] The labels in the diagram mean the following: 1. Mechanism support, 11. First receiving groove, 12. Second receiving groove, 13. Third receiving groove, 14. Slot, 15. Positioning protrusion, 16. Mounting hole, 17. Mounting boss, 171. Receiving cavity, 2. Mechanism housing, 3. Transmission assembly, 31. Transmission shaft, 32. Motor, 4. Wireless charging assembly, 41. Charging coil, 42. Double-sided foam adhesive, 43. Permanent magnet, 44. Charging PCB, 45. Coil support, 451. Insertion slot, 5. Operating assembly, 51. Main board, 52. Button board, 6. Mechanism positioning component, 61. Positioning protrusion, 62. Annular base, 63. Snap-on part, 64. Annular mounting groove, 65. Mounting through hole, 7. Motor shaft seal ring, 71. Abutment part, 72. First protrusion, 73. Second protrusion, 8. Stainless steel cover, 9. O-ring seal, 10. Battery. Detailed Implementation

[0023] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0024] Reference Appendix Figure 1-4 An electric toothbrush mechanism includes a mechanism support 1 and a mechanism housing 2. One end of the mechanism support 1 is provided with a transmission component 3 that cooperates with the brush head, and the other end is provided with a wireless charging component 4. A battery 10 and an operating component 5 are disposed between the transmission component 3 and the wireless charging component 4. The operating component 5 includes a main board 51 and a button board 52. The transmission component 3 includes a drive shaft 31 and a motor 32. The mechanism support 1 is provided with a first receiving slot 11 for accommodating the battery 10, a second receiving slot 12 for accommodating the main board 51, and a third receiving slot 13 for accommodating the motor 32. The button board 52 is also provided with a control mechanism. One end of plate 52 is connected to main plate 51, and the other end is mounted on third receiving groove 13. One end of drive shaft 31 is connected to motor 32, and the other end is set outside of mechanism support 1. Mechanism positioning component 6 is sleeved on drive shaft 31. Motor shaft sealing ring 7 is set between mechanism support 1 and mechanism positioning component 6. Slots 14 for engaging with mechanism positioning component 6 are set on both sides of mechanism support 1. Mechanism housing 2 is opened at one end corresponding to drive shaft 31. Mechanism support 1 is inserted into mechanism housing 2. Positioning protrusions 61 for engaging with mechanism housing 2 are set on both sides of mechanism positioning component 6.

[0025] In this utility model, the inner shell of the movement 2 is provided with a slot or limiting protrusion for engaging with the positioning protrusion 61, and the movement positioning component 6 and the inner shell of the movement 2 can also be interference fit.

[0026] In this embodiment, the motor shaft sealing ring 7 is arranged in a multi-layered frustum shape. The mechanism bracket 1 is provided with a positioning protrusion 15 at one end corresponding to the mechanism positioning member 6, which is adapted to the inner wall of the motor shaft sealing ring 7. The positioning protrusion 15 is provided with a through hole for the transmission shaft 31 to pass through. The motor shaft sealing ring 7 is provided with a through hole for the transmission shaft 31 to pass through. The motor shaft sealing ring 7 is sleeved on the positioning protrusion 15.

[0027] This embodiment further includes the following configuration: the mechanism positioning component 6 includes an annular base 62 sleeved on the motor shaft sealing ring 7, and a locking part 63 that engages with the slot 14 is provided at one end of the annular base 62 corresponding to the slot 14. The positioning protrusion 15 is provided on the outer periphery of the annular base 62, and an annular mounting groove 64 is provided on the outer periphery of the annular base 62. An O-ring 9 is provided in the annular mounting groove 64.

[0028] This embodiment further includes: a mounting through hole 65 in the middle of the annular base 62; the motor shaft sealing ring 7 includes an abutting part 71 that abuts against the inner wall of the annular base 62, a first protrusion 72 disposed in the mounting through hole 65, and a second protrusion 73 disposed outside the mechanism support 1; a stainless steel cover 8 is sleeved on the second protrusion 73; the inner diameter of the stainless steel cover 8 is adapted to the outer diameter of the second protrusion 73; and the outer diameter of the stainless steel cover 8 is adapted to the diameter of the mechanism housing 2.

[0029] This embodiment further includes the following configuration: the wireless charging component 4 includes a charging coil 41, double-sided foam adhesive 42, a permanent magnet 43, a charging PCB 44, and a coil bracket 45 for detachable connection with the mechanism bracket 1. The charging coil 41 and the charging PCB 44 are respectively attached to the two sides of the double-sided foam adhesive 42, and the side of the charging PCB 44 corresponding to the coil bracket 45 is attached to the coil bracket 45 with adhesive backing.

[0030] In this embodiment, the mechanism bracket 1 is further provided with a mounting boss 17 at one end corresponding to the coil bracket 45. The mounting boss 17 is provided with a receiving cavity 171 for accommodating the permanent magnet 43. The coil bracket 45, the charging PCB 44, and the double-sided foam adhesive 42 are respectively provided with positioning holes that are adapted to the mounting boss 17. The coil bracket 45, the charging PCB 44, and the double-sided foam adhesive 42 are sleeved on the mounting boss 17 through the positioning holes.

[0031] In this embodiment, the mechanism bracket 1 is further provided with mounting holes 16 on both sides of one end of the coil bracket 45, and the coil bracket 45 is provided with a plug-in part 451 that is adapted to the mounting hole 16 at one end of the mechanism bracket 1. The coil bracket 45 and the mechanism bracket 1 are plugged into the mounting hole 16 through the plug-in part 451.

[0032] Although this document frequently uses terms such as mechanism support 1, first receiving groove 11, second receiving groove 12, third receiving groove 13, slot 14, positioning protrusion 15, mounting hole 16, mounting boss 17, receiving cavity 171, mechanism housing 2, transmission assembly 3, transmission shaft 31, motor 32, wireless charging assembly 4, charging coil 41, double-sided foam adhesive 42, permanent magnet 43, charging PCB 44, coil support 45, insertion card part 451, operation assembly 5, main board 51, button board 52, mechanism positioning part 6, positioning protrusion 61, annular base 62, card part 63, annular mounting groove 64, mounting through hole 65, motor shaft sealing ring 7, abutment part 71, first protrusion 72, second protrusion 73, stainless steel cover 8, O-ring 9, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. An electric toothbrush motor, characterized in that: The device includes a mechanism support and a mechanism housing. One end of the mechanism support has a transmission component that engages with the brush head, and the other end has a wireless charging component. A battery and an operating component are disposed between the transmission component and the wireless charging component. The operating component includes a motherboard. The transmission component includes a drive shaft and a motor. The mechanism support has a first receiving slot for accommodating the battery, a second receiving slot for accommodating the motherboard, and a third receiving slot for accommodating the motor. One end of the drive shaft is connected to the motor, and the other end is located outside the mechanism support. A mechanism positioning component is fitted onto the drive shaft. A motor shaft sealing ring is provided between the mechanism support and the mechanism positioning component. Slots for engaging with the mechanism positioning component are provided on both sides of the mechanism support. The mechanism housing has an opening corresponding to one end of the drive shaft. The mechanism support is inserted into the mechanism housing. Positioning protrusions for engaging with the mechanism housing are provided on both sides of the mechanism positioning component.

2. The electric toothbrush motor according to claim 1, characterized in that: The motor shaft seal ring is arranged in a multi-layered frustum shape. One end of the mechanism bracket corresponding to the mechanism positioning component is provided with a positioning protrusion that matches the inner wall of the motor shaft seal ring. The center of the positioning protrusion is provided with a through hole for the drive shaft to pass through. The center of the motor shaft seal ring is provided with a through hole for the drive shaft to pass through. The motor shaft seal ring is sleeved on the positioning protrusion.

3. The electric toothbrush motor according to claim 2, characterized in that: The mechanism positioning component includes an annular base sleeved on the motor shaft seal ring, a locking part that engages with the slot at one end of the annular base, a positioning protrusion on the outer periphery of the annular base, an annular mounting groove on the outer periphery of the annular base, and an O-ring seal ring disposed in the annular mounting groove.

4. The electric toothbrush motor according to claim 3, characterized in that: The annular base has a mounting through hole in the middle. The motor shaft seal ring includes an abutting part that abuts against the inner wall of the annular base, a first protrusion that is disposed in the mounting through hole, and a second protrusion that is disposed outside the mechanism support. The second protrusion is covered with a stainless steel cover plate. The inner diameter of the stainless steel cover plate is adapted to the outer diameter of the second protrusion, and the outer diameter of the stainless steel cover plate is adapted to the diameter of the mechanism housing.

5. The electric toothbrush motor according to claim 1, characterized in that: The wireless charging component includes a charging coil, double-sided foam adhesive, a permanent magnet, a charging PCB, and a coil bracket for detachable connection with the mechanism bracket. The charging coil and the charging PCB are respectively attached to both sides of the double-sided foam adhesive, and the side of the charging PCB corresponding to the coil bracket is attached to the coil bracket with adhesive backing.

6. The electric toothbrush motor according to claim 5, characterized in that: The mechanism bracket has a mounting boss at one end corresponding to the coil bracket. The mounting boss has a receiving cavity for accommodating the permanent magnet. The coil bracket, charging PCB, and double-sided foam adhesive are respectively provided with positioning holes that are adapted to the mounting boss. The coil bracket, charging PCB, and double-sided foam adhesive are sleeved on the mounting boss through the positioning holes.

7. The electric toothbrush motor according to claim 5, characterized in that: The mechanism bracket has mounting holes on both sides of one end corresponding to the coil bracket. The coil bracket has a plug-in part that matches the mounting holes at one end corresponding to the mechanism bracket. The coil bracket and the mechanism bracket are engaged by inserting the plug-in part into the mounting holes.

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