Electric toothbrush

Abstract

The invention relates to an electric toothbrush which comprises a shell, an intelligent control circuit board, a storage battery, an electromagnetic driving mechanism and a transmission mechanism, a battery cavity, a driving cavity and a transmission cavity are formed in the shell, and the storage battery, the electromagnetic driving mechanism and the transmission mechanism are placed in the battery cavity, the driving cavity and the transmission cavity respectively. The transmission mechanism comprises a fixing piece, an output shaft and a transmission piece connected between the fixing piece and the output shaft, two transmission arms are symmetrically distributed at one end of the transmission piece, the two transmission arms are connected to the fixing piece and form linkage matching of the transmission piece and the fixing piece, the other end of the transmission piece is provided with a driving part, and the driving part is connected with the output shaft. The driving part is connected to the output shaft, a spring piece is arranged at the position, corresponding to the position between the two transmission arms, in the shell, and one end of the spring piece is connected to one end of the output shaft. The invention has the advantages of simple structure, stable and reliable performance, high transmission efficiency, stable transmission and long service life.

Description

Technical Field

[0001] This invention relates to the field of toothbrush technology, and more specifically to an electric toothbrush. Background Technology

[0002] Toothbrushes are indispensable items in people's daily lives. Most existing toothbrushes are manual, meaning one end of the brush head has bristles, and the other end is a handle for gripping. To use them, the user holds the handle and swings their wrist or arm back and forth to brush the teeth. This type of manual toothbrush has many inconveniences. With the continuous improvement of people's living standards, people are paying more and more attention to dental health, and electric toothbrushes, as tools for cleaning teeth, have received much attention. For example, Chinese patent CN201921310037.9 discloses a transmission device for an electric toothbrush. This transmission device uses a spring-plate transmission structure. The spring plate has poor rigidity, resulting in unstable transmission and low transmission efficiency. This weakens the oscillation of the output mounting component, leading to a reduction in the vibration energy transmitted to the brush head, which is insufficient to effectively clean toothpaste and achieve the desired cleaning effect. After prolonged use, the spring plates in the transmission mechanism of electric toothbrushes are prone to fatigue, which greatly affects the transmission efficiency of the electric toothbrush. Moreover, once the fatigue life of the spring plates reaches the critical point, it is easy for the spring plates to suddenly break, thereby shortening the product life and affecting the normal use of the electric toothbrush. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an electric toothbrush that is simple in structure, stable and reliable in performance, has high transmission efficiency, smooth transmission, and long service life.

[0004] To achieve the above objectives, the present invention employs an electric toothbrush, comprising a housing, an intelligent control circuit board, a battery, an electromagnetic drive mechanism electrically connected to the battery, and a transmission mechanism that is linked and cooperates with the electromagnetic drive mechanism. The housing has a battery cavity, a drive cavity, and a transmission cavity. The battery, the electromagnetic drive mechanism, and the transmission mechanism are respectively placed in the battery cavity, the drive cavity, and the transmission cavity. The transmission mechanism includes a fixed member movably disposed in the transmission cavity and linked and cooperates with the electromagnetic drive mechanism, an output shaft movably disposed in the transmission cavity and used to drive the brush head, and a transmission component connecting the fixed member and the output shaft. Two transmission arms are symmetrically distributed at one end of the transmission component, and the two transmission arms are connected to the fixed member, forming a linkage between the transmission component and the fixed member. The other end of the transmission component has a drive part, which is connected to the output shaft. A spring plate is disposed in the housing between the two transmission arms, and one end of the spring plate is connected to one end of the output shaft.

[0005] The beneficial effects of the above structure are as follows: A transmission component is provided between the fixed component and the output shaft. The fixed component and the output shaft are connected to the fixed component via two transmission arms, ensuring reliable reciprocating oscillation with smoother oscillation. This transmission component has good rigidity and a longer service life. It does not weaken the oscillation energy of the output shaft, ensuring that the vibration energy transmitted from the output shaft to the brush head is not reduced, resulting in higher transmission efficiency and effective cleaning of toothbrush dirt, achieving ideal cleaning results. Furthermore, the spring plate acts as a buffer for the output shaft, ensuring reliable and smooth operation. The battery, electromagnetic drive mechanism, and transmission mechanism are each housed in an independent cavity within the casing, improving the reliability of the electric toothbrush. The electromagnetic drive mechanism and transmission mechanism adopt modular designs, resulting in higher assembly efficiency. Therefore, this electric toothbrush has the advantages of simple structure, stable and reliable performance, high transmission efficiency, smooth transmission, and long service life.

[0006] Specifically, the electromagnetic drive mechanism includes an electromagnet disposed within the drive cavity and a magnet disposed within the transmission cavity and cooperating with the electromagnet. The fixing component is linked to the magnet, and the magnet moves with the electromagnet, causing the fixing component to reciprocate within the transmission cavity. The electromagnetic drive mechanism employs a magnetic levitation structure design. By changing its magnetic poles, the electromagnet can drive the magnet to deflect, thereby driving the fixing component to reciprocate. This ensures that the electromagnetic drive mechanism can reliably drive the fixing component, which is beneficial to improving the working reliability of the electric toothbrush.

[0007] Specifically, one end of the spring sheet has a connecting portion that mates with the output shaft, and one end of the output shaft has a fixing plate that mates with the connecting portion. The connecting portion is attached to the fixing plate, and a fastener is provided between the fixing plate and the connecting portion. The connecting portion of the spring sheet is attached to the fixing plate of the output shaft, thus ensuring a tighter connection between the spring sheet and the output shaft. The spring sheet provides a buffering effect on the output shaft, ensuring smooth operation of the output shaft.

[0008] Specifically, the width of the connecting portion is greater than the width of the spring sheet. This increased width increases the contact area between the connecting portion and the output shaft, ensuring a tighter connection between the spring sheet and the output shaft.

[0009] Specifically, the fixing component includes a fixing base, a fixing cap disposed on the fixing base, and a screw disposed between the fixing base and the fixing cap. Two clamping cavities are formed between the fixing base and the fixing cap to cooperate with the two transmission arms, and one end of each transmission arm passes through the two clamping cavities. The fixing component is clamped onto the two transmission arms of the transmission component by the fixing base and the fixing cap, thereby facilitating the assembly of the fixing component and the transmission component, making assembly more convenient, and ensuring smoother transmission between the fixing component and the transmission component.

[0010] Specifically, the other end of the spring sheet is provided with a fixing hole, and the housing is provided with a boss that mates with the spring sheet. A bolt connected to the boss is provided in the fixing hole. The spring sheet is bolted to the boss of the housing, which facilitates the assembly of the spring sheet and the housing, making assembly more convenient.

[0011] Specifically, the housing contains a bearing that mates with the output shaft, and the other end of the output shaft has a brush head connection portion that passes through the bearing and extends outside the housing. The bearing between the housing and the output shaft ensures the rotational accuracy of the output shaft, thus improving the operational reliability of the electric toothbrush.

[0012] Specifically, the outer wall of the housing is provided with multiple snap-fit ​​blocks that mate with the intelligent control circuit board. These snap-fit ​​blocks engage with the intelligent control circuit board, forming a snap-fit ​​connection between the housing and the intelligent control circuit board. This snap-fit ​​assembly method between the intelligent control circuit board and the housing improves assembly efficiency. Attached Figure Description

[0013] Figure 1 This is a perspective view of an embodiment of the present invention.

[0014] Figure 2 This is a cross-sectional view of an embodiment of the present invention.

[0015] Figure 3 This is an internal structural diagram of an embodiment of the present invention.

[0016] Figure 4 This is an exploded view of the transmission mechanism according to an embodiment of the present invention. Detailed Implementation

[0017] like Figures 1-4As shown, this embodiment of the invention is an electric toothbrush, including a housing 10, an intelligent control circuit board 11, a battery 12, an electromagnetic drive mechanism 20 electrically connected to the battery 12, and a transmission mechanism 30 that is linked and cooperates with the electromagnetic drive mechanism 20. The housing 10 has a battery cavity 101, a drive cavity 102, and a transmission cavity 103. The battery 12, the electromagnetic drive mechanism 20, and the transmission mechanism 30 are respectively placed in the battery cavity 101, the drive cavity 102, and the transmission cavity 103. The transmission mechanism 30 includes a fixing member 3 that is movably disposed in the transmission cavity 103 and is linked and cooperates with the electromagnetic drive mechanism 20. 1. An output shaft 32 is movably disposed within the transmission cavity 103 and used to drive the brush head movement. A transmission component 33 is connected between the fixing component 31 and the output shaft 32. Two transmission arms 331 are symmetrically distributed at one end of the transmission component 33. The two transmission arms 331 are connected to the fixing component 31 and form a linkage between the transmission component 33 and the fixing component 31. The other end of the transmission component 33 has a driving part 332, which is connected to the output shaft 32. A spring plate 34 is disposed in the housing 10 between the two transmission arms 331. One end of the spring plate 34 is connected to one end of the output shaft 32.

[0018] like Figure 2 , 3As shown in Figure 4, the electromagnetic drive mechanism 20 includes an electromagnet 21 disposed in the drive cavity 102 and a magnet 22 disposed in the transmission cavity 102 and cooperating with the electromagnet 21. The fixing member is linked to the magnet 22, and the magnet 22 moves with the electromagnet 21, causing the fixing member 31 to reciprocate within the transmission cavity 102. The electromagnetic drive mechanism adopts a magnetic levitation structure design. The electromagnet can drive the magnet to deflect by changing its magnetic poles, and the electromagnet drives the fixing member to reciprocate, thereby ensuring that the electromagnetic drive mechanism can reliably drive the fixing member to move, which is beneficial to improving the working reliability of the electric toothbrush. One end of the spring plate 34 has a connecting part 341 that cooperates with the output shaft 32, and one end of the output shaft 32 has a fixing piece 321 that cooperates with the connecting part 341. The connecting part 341 is attached to the fixing piece 321, and a fastener 35 is provided between the fixing piece 321 and the connecting part 341. The connecting part of the spring plate fits against the fixed plate of the output shaft, thus ensuring a tighter connection between the spring plate and the output shaft. The spring plate can buffer the output shaft, ensuring smooth operation. The width of the connecting part 341 is greater than the width of the spring plate 34. This increases the contact area between the connecting part and the output shaft, ensuring a tighter connection. The fixing member 31 includes a fixing base 311, a fixing cover 312 disposed on the fixing base 311, and a screw 313 disposed between the fixing base 311 and the fixing cover 312. Two clamping cavities 310 are formed between the fixing base 311 and the fixing cover 312 to cooperate with the two transmission arms 331. One end of each transmission arm 331 passes through the two clamping cavities 310. The fixing component is clamped onto the two transmission arms of the transmission component via a fixing seat and a fixing cover, facilitating assembly between the fixing component and the transmission component, making assembly more convenient, and ensuring smoother transmission between the fixing component and the transmission component. The other end of the spring plate 34 is provided with a fixing hole 342, and the housing 10 is provided with a boss 104 that mates with the spring plate 34. A bolt 36 is provided in the fixing hole 342 to connect with the boss 104. The spring plate is bolted to the boss of the housing, facilitating assembly between the spring plate and the housing, making assembly more convenient. The housing 10 is provided with a bearing 37 that mates with the output shaft 32, and the other end of the output shaft 32 has a brush head connection portion 322 that passes through the bearing 37 and extends outside the housing 10. The bearing between the housing and the output shaft ensures the rotational accuracy of the output shaft, which helps improve the operational reliability of the electric toothbrush. The outer wall of the housing 10 is provided with multiple snap-fit ​​blocks 105 that cooperate with the intelligent control circuit board 11. The multiple snap-fit ​​blocks 105 engage with the intelligent control circuit board 11, forming a snap-fit ​​connection between the housing 10 and the intelligent control circuit board 11. The intelligent control circuit board and the housing are assembled using a snap-fit ​​method, which improves assembly efficiency.

[0019] A transmission component is installed between the fixed component and the output shaft. The fixed component and the output shaft are connected to the fixed component via two transmission arms, ensuring reliable and smooth reciprocating oscillation. This transmission component has high rigidity and a longer service life. It does not weaken the oscillation energy of the output shaft, ensuring that the vibration energy transmitted from the output shaft to the brush head is not reduced, resulting in higher transmission efficiency and effective cleaning of toothbrush dirt for an ideal cleaning effect. The spring plate also acts as a buffer for the output shaft, ensuring reliable and smooth operation. Furthermore, the battery, electromagnetic drive mechanism, and transmission mechanism are each housed in an independent cavity within the casing, improving the reliability of the electric toothbrush. The electromagnetic drive mechanism and transmission mechanism adopt a modular design, increasing assembly efficiency. Therefore, this electric toothbrush has the advantages of simple structure, stable and reliable performance, high transmission efficiency, smooth transmission, and long service life.

Claims

1. An electric toothbrush, characterized in that: The device includes a housing, an intelligent control circuit board, a battery, an electromagnetic drive mechanism electrically connected to the battery, and a transmission mechanism that works in conjunction with the electromagnetic drive mechanism. The housing contains a battery cavity, a drive cavity, and a transmission cavity. The battery, electromagnetic drive mechanism, and transmission mechanism are respectively placed within the battery cavity, drive cavity, and transmission cavity. The transmission mechanism includes a fixed component movably disposed within the transmission cavity and working in conjunction with the electromagnetic drive mechanism; an output shaft movably disposed within the transmission cavity and used to drive the brush head; and a transmission component connecting the fixed component and the output shaft. Two transmission arms are symmetrically distributed at one end of the transmission component, and these two transmission arms are connected to the fixed component, forming a linkage between the transmission component and the fixed component. The other end of the transmission component has a drive unit connected to the output shaft. A spring plate is disposed within the housing between the two transmission arms, with one end of the spring plate connected to one end of the output shaft.

2. The electric toothbrush according to claim 1, characterized in that: The electromagnetic drive mechanism includes an electromagnet disposed in the drive cavity and a magnet disposed in the transmission cavity and cooperating with the electromagnet. The fixing member is linked to the magnet, and the magnet moves with the electromagnet and drives the fixing member to swing back and forth in the transmission cavity.

3. The electric toothbrush according to claim 1 or 2, characterized in that: The spring sheet has a connecting part at one end that mates with the output shaft, and the output shaft has a fixing piece at one end that mates with the connecting part. The connecting part is attached to the fixing piece, and a fastener is provided between the fixing piece and the connecting part.

4. The electric toothbrush according to claim 3, characterized in that: The width of the connecting part is greater than the width of the spring sheet.

5. The electric toothbrush according to claim 1 or 2, characterized in that: The fixing component includes a fixing base, a fixing cover disposed on the fixing base, and a screw disposed between the fixing base and the fixing cover. Two clamping cavities are formed between the fixing base and the fixing cover to cooperate with the two transmission arms. One end of the two transmission arms is inserted into the two clamping cavities.

6. The electric toothbrush according to claim 1 or 2, characterized in that: The aforementioned -1- The other end of the spring sheet is provided with a fixing hole, and the housing is provided with a boss that mates with the spring sheet. The fixing hole is provided with a bolt that connects to the boss.

7. The electric toothbrush according to claim 1 or 2, characterized in that: The housing contains a bearing that mates with the output shaft, and the other end of the output shaft has a brush head connection that passes through the bearing and extends out of the housing.

8. The electric toothbrush according to claim 1 or 2, characterized in that: The outer wall of the housing is provided with multiple snap-fit ​​blocks that cooperate with the intelligent control circuit board. The multiple snap-fit ​​blocks snap onto the intelligent control circuit board, forming a snap-fit ​​cooperation between the housing and the intelligent control circuit board.

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