Wireless charging electric toothbrush and storage device therefor

By adopting a metal shell and closed end design in the electric toothbrush, the inner shell is equipped with a stacked induction coil and magnet block, which solves the problems of waterproofness and low charging efficiency, achieves efficient sealing and charging, and provides convenient cleaning and disinfection functions.

WO2025168164A1PCT designated stage Publication Date: 2025-08-14CORAL INNOVATIONS LTD
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Patent Information

Application Number
PCT/CN2025/087523
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-02-06
Filing Date
2025-04-07
Publication Date
2025-08-14

AI Technical Summary

Technical Problem

The existing electric toothbrushes have insufficient waterproof performance, the sealing structure is prone to aging and loose, the charging efficiency is low, and the surface of the body is not easy to clean.

Method used

It adopts a metal shell and closed end design, with a stacked induction coil and magnet block on the inner shell, combining magnetic connection and closure structure to improve waterproofness and charging efficiency, and is equipped with a disinfection box and a wall hanging box for easy cleaning and fixing.

Benefits of technology

It significantly improves the waterproof performance of electric toothbrushes, enhances charging efficiency, simplifies the cleaning process, reduces dirt accumulation, and provides convenient disinfection and charging functions.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application relates to the technical field of electric toothbrushes. Disclosed are a wireless charging electric toothbrush and a storage device therefor. The wireless charging electric toothbrush comprises a machine body, which comprises a cleaning portion and a handle connected to each other, wherein the cleaning portion is provided with a brush head; and the handle comprises an outer shell and an inner shell, the outer shell being sleeved on the inner shell, and the outer shell being made of a metal material, thereby facilitating the cleaning of the outer surface of the handle. The end of the inner shell away from the cleaning portion is a sealed closed end, and is free from a detachable mounting part, such that the waterproof effect can be remarkably improved, and water leakage caused by sealing aging or loosening can be prevented. A charging component is provided in the closed end, and the charging component comprises magnet blocks and several stacked induction coils, wherein the magnet blocks are located on the radial peripheries of the induction coils, and by means of the stacked induction coils, the power transmission efficiency can be increased in a limited space, thereby improving the charging efficiency. Further disclosed is a storage device. The storage device comprises a charging base, a disinfection box and a wall-mounted box, and can be used for improving the charging efficiency, as well as facilitating cleaning and usage.
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Description

A wireless charging electric toothbrush and its storage device Technical Field

[0001] The present application relates to the technical field of electric toothbrushes, and in particular to a wirelessly charged electric toothbrush and a storage device thereof. Background Art

[0002] With the continuous improvement of living standards, electric toothbrushes are becoming more and more popular in people's lives and gradually becoming a necessity. Electric toothbrushes will come into contact with water during brushing, so the waterproof performance of electric toothbrushes is very important. First, since most current electric toothbrushes have wireless charging components installed at the bottom, they are mostly connected and installed in sections, or are equipped with a detachable bottom cover. After long-term use, the waterproof effect is easily weakened due to loose seals. Secondly, electric toothbrushes are exposed to humid environments for a long time. Currently, most electric toothbrushes use plastic bodies. The surface of the plastic shell is easily left with water stains and is difficult to clean. It is also prone to aging after long-term use. Thirdly, due to the small radial size of the electric toothbrush, the current wireless charging structure is insufficient in power, resulting in insufficient charging efficiency. Summary of the Invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a wireless charging electric toothbrush and a storage device thereof, which optimizes sealing performance and charging efficiency while making the outer surface of the body easy to clean.

[0004] A wireless charging electric toothbrush according to an embodiment of the first aspect of the present application includes:

[0005] The main body of the machine includes a cleaning part and a handle that are connected to each other, and the cleaning part is provided with a brush head; the handle includes an outer shell and an inner shell, the outer shell is mounted on the inner shell, the outer shell is made of metal, and the end of the inner shell away from the cleaning part is a closed end; a charging component is provided in the closed end, and the charging component includes a magnet block and several stacked induction coils, and the magnet block is located on the radial outer periphery of the induction coil.

[0006] According to the embodiment of the first aspect of the present application, a wireless charging electric toothbrush has at least the following beneficial effects: this embodiment includes a body, the body includes a cleaning part and a handle connected to each other, and the cleaning part is provided with a brush head; the handle includes an outer shell and an inner shell, the outer shell is mounted on the inner shell, and the outer shell is made of metal, which is conducive to making the outer surface of the handle easy to clean. The end of the inner shell away from the cleaning part is a closed end with a closed setting. The lack of detachable mounting parts can significantly improve the waterproof effect and avoid water leakage caused by aging or loosening of the seal. A charging component is provided in the closed end, and the charging component includes a magnet block and a plurality of stacked induction coils. The magnet block is located on the radial outer periphery of the induction coil. The magnet block is used to fix the handle on the charging base during charging. The stacked induction coils can increase the power transmission efficiency in a limited space, thereby improving the charging efficiency.

[0007] According to an embodiment of the first aspect of the present application, a covering portion covering the outer end surface of the closed end is provided on the end of the shell away from the cleaning portion, and the covering portion extends toward the axis along the radial direction of the shell.

[0008] According to an embodiment of the first aspect of the present application, a sealing member is provided at one end of the inner shell close to the cleaning portion, and a sealing ring is provided between the sealing member and the inner wall of the inner shell.

[0009] According to an embodiment of the first aspect of the present application, a battery compartment and a motor are provided in the inner shell, and the charging component is fixed to the end of the battery compartment away from the motor.

[0010] According to an embodiment of the first aspect of the present application, there are at least two magnet blocks, and the two magnet blocks are located on both sides of the induction coil in a radial direction.

[0011] According to an embodiment of the first aspect of the present application, a button is provided on one side of the inner shell, and an attraction block is provided on the other side of the battery compartment opposite to the button.

[0012] A storage device according to an embodiment of the second aspect of the present application includes the aforementioned wirelessly charged electric toothbrush, including:

[0013] The charging base is provided with a receiving cavity for the handle to be plugged in. The charging base is provided with a plurality of stacked transmitting coils. When the handle is plugged into the receiving cavity, the transmitting coils can generate induction with the induction coils and realize power transmission;

[0014] The disinfection box includes an upper cover and a base. The upper cover is provided with a disinfection component that can disinfect the brush head. The base has a receiving cavity for the body. The base is provided with a transmitting coil at a position corresponding to the closed end to realize charging of the body. The handle and the base are connected by a magnetic connection.

[0015] The wall-mounted box has a mounting slot for placing the body of the device. The handle is connected to the mounting slot by a magnetic connection so that the body of the device is fixed in the mounting slot.

[0016] According to the second aspect of the present application, a storage device has the following beneficial effects: This embodiment includes a charging station, a disinfection box, and a wall-mounted box. The charging station is used for daily charging, the disinfection box is used for travel storage and can also perform disinfection functions, and the wall-mounted box can secure the handle to the bathroom wall, preventing the toothbrush body from being placed in locations prone to water accumulation and reducing dirt accumulation on the handle surface. The charging station has a receiving cavity for the handle and is equipped with a plurality of stacked transmitting coils, which helps improve the efficiency of power transmission and thus charging efficiency. The disinfection box includes an upper cover and a base. The upper cover is equipped with a disinfection assembly that can disinfect the brush head, preventing bacterial growth during travel storage and improving the convenience of cleaning the toothbrush. The base has a receiving cavity for the toothbrush body, and a transmitting coil is provided in the base corresponding to the closed end to charge the toothbrush body. The handle and the base are connected by a magnetic connection, which can achieve both disinfection and convenient charging functions. The wall-mounted box has a mounting slot for the toothbrush body, and the handle and the mounting slot are connected by a magnetic connection to secure the toothbrush body in the mounting slot, making it easy to use.

[0017] According to an embodiment of the second aspect of the present application, magnetic blocks are provided in the base and the wall-mounted box. When the handle is placed in the accommodating cavity or the installation groove, the positions of the magnetic block and the attraction block correspond.

[0018] According to an embodiment of the second aspect of the present application, the disinfection component is provided with an emitter, the position of the emitter corresponds to the brush head, and the emitter can emit ultraviolet rays to achieve the disinfection function.

[0019] According to an embodiment of the second aspect of the present application, magnet blocks are provided on both radial sides of the transmitting coil, and the magnet blocks are used to maintain stable power transmission between the induction coil and the transmitting coil in the handle.

[0020] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present application is further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] FIG1 is an isometric view of a wirelessly charged electric toothbrush according to an embodiment of the first aspect of the present application;

[0023] FIG2 is a cross-sectional view of a wirelessly charged electric toothbrush according to an embodiment of the first aspect of the present application;

[0024] FIG3 is a partial view of a charging component in an embodiment of the first aspect of the present application;

[0025] FIG4 is a partial view of A in FIG2 ;

[0026] FIG5 is a cross-sectional view of the disinfection box and the body of the embodiment of the second aspect of the present application.

[0027] FIG6 is a partial cross-sectional view of a charging base in an embodiment of the second aspect of the present application;

[0028] FIG7 is a view showing the arrangement of the transmitting coil in the charging base in an embodiment of the second aspect of the present application;

[0029] FIG8 is a cross-sectional view of the wall-mounted box in an embodiment of the second aspect of the present application.

[0030] Figure markings: Body 100; Cleaning part 101; Brush head 102; Battery compartment 103; Motor 104; Button 105; Attraction block 106; Battery cell 107; Connecting rod 108; Handle 110; Outer shell 111; Inner shell 112; Covering part 113; Closed end 114; Induction coil 115; Magnet block 116; Seal 117; Sealing ring 118; Charging base 120; Accommodating chamber 121; Transmitting coil 122; Wall-mounted box 123; Mounting slot 124; Magnetic block 125; Disinfection box 130; Upper cover 131; Base 132; Accommodating chamber 133; Transmitter 134. DETAILED DESCRIPTION

[0031] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0032] In the description of this application, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0033] In the description of this application, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.

[0034] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0035] Referring to FIG1 , a wireless charging electric toothbrush according to a first embodiment of the present application includes a body 100 comprising a cleaning portion 101 and a handle 110 connected to each other. The cleaning portion 101 includes a brush head 102. The handle 110 comprises an outer shell 111 and an inner shell 112. The outer shell 111 is sleeved onto the inner shell 112. The outer shell 111 is made of metal, making the outer surface of the handle 110 easy to clean. Optionally, the outer shell 111 can be made of a material such as stainless steel, aluminum alloy, or magnesium alloy, so that the surface has no gaps, optimizing cleaning convenience and preventing plastic aging. Meanwhile, the inner shell 112 is nested within the outer shell 111 and bonded to the inner wall of the outer shell 111. The use of adhesive to secure the outer shell 111 and the inner shell 112 simplifies the connection structure and improves internal space utilization. Furthermore, since electric toothbrushes are often maintenance-free, the use of adhesive bonding can enhance structural strength. Optionally, the inner shell 112 is preferably made of fully biodegradable PLA material, i.e., fully biodegradable polylactic acid (PLA). PLA has excellent biocompatibility and biodegradability, and can be completely decomposed into water and carbon dioxide under certain conditions, making it highly environmentally friendly. Simultaneously, the brush head 102 can also be made of biodegradable and environmentally friendly materials such as plant fibers to reduce environmental pollution.

[0036] Referring to Figure 2, the end of the inner shell 112 away from the cleaning portion 101 is a closed end 114. The closed end 114 and the inner shell 112 are integrally formed, and the lack of detachable mounting parts significantly improves the waterproof effect and prevents water leakage caused by aging or loosening of the seal. A charging component is provided within the closed end 114. The charging component includes a magnet block 116 and a plurality of stacked induction coils 115. The magnet block 116 is located on the radial outer periphery of the induction coil 115. The magnet block 116 is used to fix the handle 110 on the charging base 120 during charging. The stacked induction coils 115 can increase the power transmission efficiency within a limited space, thereby improving the charging efficiency. Optionally, a battery compartment 103 and a motor 104 are provided in the inner shell 112. A battery cell 107 is installed in the battery compartment 103. The battery cell 107 is electrically connected to the charging component. The battery compartment 103 and the motor 104 are stacked along the axis of the inner shell 112. The charging component is fixed to the end of the battery compartment 103 away from the motor 104. Optionally, a button 105 is provided on one side of the inner shell 112 for switching on and off or adjusting functions. An attraction block 106 is provided on the other side of the battery compartment 103 opposite the button 105. The attraction block 106 is used to achieve a magnetic connection when the body 100 is installed in the wall-mounted box 123 and the disinfection box 130. It is understood that the motor 104, the charging compartment, and the charging component are all pre-connected and installed, and then integrally inserted into the opening of the inner shell 112 near the cleaning section 101. This improves installation efficiency, simplifies the connection structure between the inner shell 112 and the internal components, and facilitates the molding and manufacturing of the various components.

[0037] 3 , at least two magnet blocks 116 are provided, and the two magnet blocks 116 are located on both sides of the induction coil 115 in the radial direction. Preferably, the magnet blocks 116 are configured in a crescent or semicircular shape to fully utilize the internal space of the inner shell 112. Optionally, at least three stacked induction coils 115 are provided. By stacking the coils, the magnetic field distribution can be made more uniform, which helps increase the coupling coefficient between the transmitting coil 122 and the induction coil 115, thereby enhancing the energy transfer efficiency between the two coils. Furthermore, the multi-layer coils can concentrate more magnetic flux in the effective area, increasing the magnetic flux density per unit area, thereby improving the wireless transmission power and efficiency. Furthermore, the stacked coil structure can reduce edge effects, allowing more energy to be concentrated in the effective area for transmission, significantly improving the efficiency and practicality of the wireless charging system.

[0038] 2 , the end of the housing 111 away from the cleaning portion 101 is provided with a covering portion 113 that covers the outer end surface of the closed end 114. The covering portion 113 extends radially toward the axis of the housing 111 to prevent the closed end 114 from slipping out of the opening at the end of the housing 111. Furthermore, the radial edge of the closed end 114 has a clearance groove that can accommodate the covering portion 113. The covering portion 113 is embedded in the clearance groove, so that the outer wall surface of the closed end 114 is flush with the end wall surface of the housing 111, which helps to beautify the appearance and prevent dirt accumulation.

[0039] Referring to Figure 4, a seal 117 is provided at one end of the inner shell 112 near the cleaning portion 101. A sealing ring 118 is provided between the seal 117 and the inner wall of the inner shell 112. The seal 117 is sealed to the end of the inner shell 112 near the cleaning portion 101. The seal 117 has a section that is inserted into the inner shell 112, and the sealing ring 118 is arranged around it to achieve a radial seal between the seal 117 and the inner shell 112. Furthermore, a gap is provided between the seal 117 and the outer shell 111, and the outer shell 111 and the seal 117 can be sealed by injecting an adhesive to prevent moisture from entering. Optionally, the seal 117 uses a fully biodegradable PLA material to improve the environmental friendliness of the product.

[0040] 5 to 8 , a storage device in an embodiment of the second aspect of the present application includes the aforementioned wirelessly charged electric toothbrush, wherein the storage device includes a charging stand 120, a disinfection box 130 and a wall-mounted box 123. The charging stand 120 is used for daily charging, the disinfection box 130 is used for travel storage and can realize a disinfection function, the wall-mounted box 123 can be fixed on the wall, and the handle 110 can be fixed on the wall-mounted box 123 to realize the fixation of the handle 110 on the bathroom wall, thereby avoiding the body 100 from being placed in a location where water is easily accumulated, and reducing the accumulation of dirt on the surface of the handle 110.

[0041] The charging base 120 is provided with a receiving cavity 121 into which the handle 110 can be inserted. The receiving cavity 121 has a certain depth. In the embodiment of the present application, the receiving cavity 121 can at least completely cover the closed end 114, which helps to improve the insertion stability of the handle 110. The charging base 120 is provided with a plurality of stacked transmitting coils 122, which helps to improve the efficiency of power transmission and thus improve charging efficiency. Furthermore, the transmitting coils 122 of the charging base 120 are provided with magnet blocks 116 radially outwardly to achieve a magnetic connection between the charging base 120 and the handle 110, which facilitates maintaining stability during charging.

[0042] The disinfection box 130 includes a top cover 131 and a base 132. The top cover 131 and the base 132 can be connected by a hinge or a sliding cover. The top cover 131 is equipped with a disinfection component that can disinfect the brush head 102, preventing bacterial growth during travel and improving the cleaning convenience of the toothbrush. Specifically, the disinfection component is equipped with an emitter 134, which is located in a corresponding position with the brush head 102. The emitter 134 can emit ultraviolet light to achieve a disinfection function. When the body 100 is placed in the disinfection box 130, it can be disinfected and sterilized at any time, improving the cleanliness of the brush head 102 and also improving the cleaning convenience of the toothbrush.

[0043] The base 132 has a receiving cavity 133 for placing the body 100 . A transmitting coil 122 is provided at a portion of the base 132 corresponding to the closed end 114 , and at least three stacked transmitting coils 122 are provided to achieve efficient charging of the body 100 .

[0044] The handle 110 and the base 132 are connected magnetically, which enables a convenient charging function while realizing the disinfection function. At the same time, the wall-mounted box 123 has a mounting slot 124 for placing the body 100. The handle 110 and the mounting slot 124 are connected magnetically so that the body 100 is fixed in the mounting slot 124, which is convenient to use. Specifically, a magnetic block 125 is provided in both the base 132 and the wall-mounted box 123. When the handle 110 is placed in the accommodating cavity 133 or in the mounting slot 124, the position of the magnetic block 125 corresponds to the position of the attraction block 106 to realize magnetic installation of the body 100, which is convenient for taking and placing. Optionally, the mounting slot 124 is a curved surface that matches the curvature of the side wall of the handle 110, which is conducive to increasing the contact area between the wall-mounted box 123 and the surface of the handle 110 to improve the installation stability. Furthermore, the outer shells 111 of the charging stand 120 , the disinfection box 130 and the wall-mounted box 123 may all be made of PLA, a biodegradable and environmentally friendly material, to achieve recyclability and degradation, thereby improving environmental friendliness.

[0045] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present application.

Claims

1. A wireless charging electric toothbrush, characterized in that: include: The main body of the device includes a cleaning part and a handle that are connected to each other, and the cleaning part is provided with a brush head; the handle includes an outer shell and an inner shell, and the outer shell is sleeved on the inner shell. The outer shell is made of metal, and the end of the inner shell away from the cleaning part is a closed end; a charging component is provided in the closed end, and the charging component includes a magnet block and several stacked induction coils, and the magnet block is located on the radial outer periphery of the induction coil.

2. A wireless charging electric toothbrush according to claim 1, characterized in that: An end of the shell away from the cleaning portion is provided with a covering portion covering the outer end surface of the closed end, and the covering portion extends toward the axis along the radial direction of the shell.

3. The wireless charging electric toothbrush according to claim 1, characterized in that: A sealing member is provided at one end of the inner shell close to the cleaning portion, and a sealing ring is provided between the sealing member and the inner wall of the inner shell.

4. The wireless charging electric toothbrush according to claim 1, characterized in that: A battery compartment and a motor are provided in the inner shell, and the charging component is fixed to the end of the battery compartment away from the motor.

5. The wireless charging electric toothbrush according to claim 1, characterized in that: There are at least two magnet blocks, and the two magnet blocks are located on both sides of the induction coil in the radial direction.

6. The wireless charging electric toothbrush according to claim 4, characterized in that: A button is provided on one side of the inner shell, and an attraction block is provided on the other side of the battery compartment opposite to the button.

7. A storage device comprising a wireless charging electric toothbrush according to any one of claims 1 to 6, wherein the body is provided with a brush head and a handle, and the handle is provided with an induction coil, a magnet block and an attraction block, characterized in that: include: A charging base is provided with a receiving cavity capable of receiving the handle, wherein the charging base is provided with a plurality of stacked transmitting coils. When the handle is inserted into the receiving cavity, the transmitting coils can generate induction with the induction coils and realize power transmission; A disinfection box, comprising an upper cover and a base, wherein the upper cover is provided with a disinfection assembly capable of disinfecting the brush head, the base has a receiving cavity capable of placing the body, a portion of the base corresponding to the closed end is provided with the transmitting coil to charge the body, and the handle is connected to the base via a magnetic connection; The wall-mounted box has a mounting slot capable of placing the body, and the handle is connected to the mounting slot by magnetism so that the body is fixed in the mounting slot.

8. The storage device according to claim 7, characterized in that: Magnetic blocks are provided in the base and the wall-hanging box. When the handle is placed in the accommodating cavity or in the mounting groove, the positions of the magnetic block and the attraction block correspond.

9. The storage device according to claim 7, characterized in that: The disinfection component is provided with an emitter, the position of the emitter corresponds to the brush head, and the emitter can emit ultraviolet rays to achieve a disinfection function.

10. The storage device according to claim 7, characterized in that: The magnet blocks are provided on both radial sides of the transmitting coil, and the induction coil in the handle and the transmitting coil are kept in stable power transmission through the magnet blocks.

Citation Information

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