Charging seat and electric toothbrush

Abstract

The utility model relates to the technical field of electric toothbrush charging seats, in particular to a charging seat and an electric toothbrush. After the electric toothbrush is placed in the charging base, the ejector pin assembly is in butt joint with the toothbrush handle, and therefore the electric toothbrush is charged through the charging base. In the charging process of the electric toothbrush at the charging base, the electric toothbrush is fixed through the first magnetic attraction piece in a magnetic attraction mode, the bonding strength of the electric toothbrush and the charging base is improved, the electric toothbrush is prevented from falling down or falling off, and the reliability and safety of the charging process of the electric toothbrush are improved. Due to the fact that the electric toothbrush is combined with the charging base in a magnetic attraction mode instead of being combined with the charging base in a pluggable mode, the electric toothbrush can be effectively combined with the charging base and can be rapidly separated from the charging base. Therefore, the toothbrush handle and the charging seat of the electric toothbrush can be conveniently combined and separated.

Description

Technical Field

[0001] The present application relates to the technical field of electric toothbrush charging stands, and in particular to a charging stand and an electric toothbrush. Background Art

[0002] At present, electric toothbrushes convert electrical energy into kinetic energy through the operation of motors, drive the toothbrush head to move, and then clean the teeth. Therefore, electric toothbrushes need to consume electrical energy.

[0003] If the electric toothbrush is powered on by wiring, the user needs to be confined to a specific wiring point to clean the teeth. This method is not only inconvenient, but also has the risk of electric shock to the user and is unsafe.

[0004] Therefore, electric toothbrushes often have built-in rechargeable batteries, and the electrical energy stored in the batteries drives the electric toothbrush to clean the teeth.

[0005] When the electric energy in the battery of the electric toothbrush is consumed, the electric toothbrush needs to be charged so that there is enough electric energy in the battery to drive the electric toothbrush to operate.

[0006] At present, electric toothbrushes are charged using a charging base. However, traditional charging bases often use plug-in connectors, and plug-in connectors often require the interface of the toothbrush handle to be aligned with the interface of the charging base and inserted into it. Since plug-in connectors often require the two docking interfaces to be inserted deeper to achieve a good docking effect, this will result in a large extraction force required to pull the toothbrush handle out of the charging base when the toothbrush handle is separated from the charging base. When the plug or wiring harness is subjected to severe tension, the risk of damage to the interface or wiring harness will increase, and the charging base needs to be fixed to facilitate the plugging and unplugging of the toothbrush handle at the charging base. This plug-in and unplugging method is neither safe nor convenient.

[0007] It can be seen that how to make the toothbrush handle and the charging stand conveniently combined and separated is a technical problem that needs to be solved urgently. Utility Model Content

[0008] The present application provides a charging stand and an electric toothbrush, which are intended to solve the technical problem in the prior art of how to conveniently combine and detach a toothbrush handle from a charging stand.

[0009] The present application provides a charging stand for charging an electric toothbrush, comprising:

[0010] A main housing, the main housing being used to carry at least a toothbrush handle of the electric toothbrush;

[0011] A first magnetic attraction member, the first magnetic attraction member is disposed in the main housing, and the first magnetic attraction member is used to attract the toothbrush handle;

[0012] The first magnetic attraction component is arranged in the main shell, and the thimble assembly is at least partially exposed from the main shell. The thimble assembly is used to dock with the toothbrush handle so that the charging seat can charge the electric toothbrush.

[0013] Furthermore, a fixing groove is provided on a side of the main shell facing away from the toothbrush handle, and the first magnetic attraction member is installed in the fixing groove.

[0014] Furthermore, the first magnetic elements are arranged in at least pairs and are located on both sides of the ejector assembly.

[0015] Furthermore, the ejector pin assembly comprises:

[0016] Ejector parts;

[0017] A fixing part is combined with the ejector part by means of in-mold injection molding.

[0018] Furthermore, a waterproof groove is provided in the main shell, the ejector assembly is installed in the waterproof groove, and the inner wall of the waterproof groove limits the fixing member.

[0019] Furthermore, a limiting groove is provided on one side of the main housing facing the toothbrush handle, and the limiting groove is used to limit the toothbrush handle;

[0020] The ejector pin assembly is at least partially exposed at the bottom of the limiting groove.

[0021] Furthermore, a positioning groove is provided at the bottom of the limiting groove, and the ejector pin assembly is within the range of the positioning groove.

[0022] Furthermore, an anti-skid pad is installed on the bottom of the main shell.

[0023] On the other hand, the present application also provides an electric toothbrush, which is charged through the above-mentioned charging stand, comprising:

[0024] A toothbrush handle, wherein the toothbrush handle is provided with a charging contact, and the charging contact is adapted to the ejector assembly;

[0025] The second magnetic attraction component is arranged at one end of the toothbrush handle close to the charging seat, and the second magnetic attraction component and the first magnetic attraction component can be attracted to each other.

[0026] Furthermore, the toothbrush handle is provided with a positioning protrusion, and the charging contact is within the range of the positioning protrusion;

[0027] The positioning protrusion is matched with the positioning groove of the main shell of the charging seat, and the height of the positioning protrusion is smaller than the diameter of the charging contact.

[0028] The beneficial effects achieved by this application are:

[0029] The present application proposes a charging stand, when the electric toothbrush is placed in the charging stand, the ejector assembly docks with the toothbrush handle, so that the electric toothbrush is charged through the charging stand. During the process of charging the electric toothbrush at the charging stand, the electric toothbrush is fixed by the first magnetic attraction member through magnetic attraction, thereby improving the bonding strength between the electric toothbrush and the charging stand, preventing the electric toothbrush from tipping over or falling, and improving the reliability and safety of the electric toothbrush charging process. Since the electric toothbrush does not need to be connected to the charging stand by plugging and unplugging, but is connected to the charging stand by magnetic attraction, the electric toothbrush can be effectively connected to the charging stand and quickly disconnected from the charging stand. In this way, the toothbrush handle of the electric toothbrush can be easily connected and disconnected from the charging stand. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic diagram of the three-dimensional structure of a charging base in an embodiment of the present invention;

[0031] Figure 2 is a three-dimensional structural cross-sectional view of the charging base in the AA direction according to an embodiment of the present invention;

[0032] Figure 3 is an exploded view of a charging base in an embodiment of the present invention;

[0033] Figure 4 is a schematic diagram of the internal structure of the main housing in an embodiment of the present invention;

[0034] Figure 5 is a three-dimensional structural cross-sectional view of an electric toothbrush and a charging stand in an embodiment of the present invention;

[0035] Figure 6 It is a three-dimensional structural cross-sectional view of the electric toothbrush related structure and the charging stand in an embodiment of the present invention.

[0036] Description of main component symbols:

[0037] 10. Electric toothbrush; 11. Toothbrush handle; 12. Limiting protrusion; 13. Positioning protrusion; 14. Charging contact; 15. Second magnetic attraction member;

[0038] 20. Charging base; 21. Main shell; 211. Fixing groove; 212. Waterproof groove; 213. Limiting groove; 214. Positioning groove; 22. First magnetic attraction member; 23. Ejector pin assembly; 231. Ejector pin member; 232. Fixing member; 24. Anti-slip pad. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model. In addition, it should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0040] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "left", "right", "horizontal", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention 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 should not be understood as limitations on the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed in itself. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0045] See also Figures 1 to 3 In some embodiments of the present application, a charging stand 20 provided in the present application is used to charge the electric toothbrush 10, including: a main shell 21, a first magnetic attraction component 22 and a thimble assembly 23.

[0046] The main housing 21 is used to carry at least the toothbrush handle 11 of the electric toothbrush 10. The first magnetic member 22 is disposed in the main housing 21, and the first magnetic member 22 is used to attract the toothbrush handle 11. The ejector assembly 23 is disposed in the main housing 21, and the ejector assembly 23 is at least partially exposed from the main housing 21, and the ejector assembly 23 is used to dock with the toothbrush handle 11, so that the charging stand 20 can charge the electric toothbrush 10.

[0047] When the electric toothbrush 10 is placed in the charging stand 20, the ejector assembly 23 docks with the toothbrush handle 11, so that the electric toothbrush 10 is charged through the charging stand 20. During the charging process of the electric toothbrush 10 at the charging stand 20, the first magnetic attraction member 22 fixes the electric toothbrush 10 by magnetic attraction, thereby improving the bonding strength between the electric toothbrush 10 and the charging stand 20, preventing the electric toothbrush 10 from tipping over or falling, and improving the reliability and safety of the charging process of the electric toothbrush 10.

[0048] Since the electric toothbrush 10 does not need to be connected to the charging stand 20 by plugging and unplugging, but is connected to the charging stand 20 by magnetic attraction, the electric toothbrush 10 can be effectively connected to the charging stand 20 and quickly disconnected from the charging stand 20.

[0049] In this way, the toothbrush handle 11 of the electric toothbrush 10 and the charging stand 20 can be easily connected and disconnected.

[0050] See also Figures 1 to 4 In some embodiments of the present application, a fixing groove 211 is provided on a side of the main shell 21 facing away from the toothbrush handle 11 , and the first magnetic attraction member 22 is installed in the fixing groove 211 .

[0051] The first magnetic member 22 is fixed by the fixing groove 211, thereby preventing the first magnetic member 22 from moving in the main housing 21, so that the first magnetic member 22 can stably stay in the area of ​​the main housing 21 close to the toothbrush handle 11. When the toothbrush handle 11 of the electric toothbrush 10 is placed on the bearing surface of the main housing 21, the toothbrush handle 11 enters the effective magnetic attraction range of the first magnetic member 22, and then the toothbrush handle 11 of the electric toothbrush 10 is magnetically fixed by the first magnetic member 22.

[0052] The fixing groove 211 is arranged on the side away from the toothbrush handle 11, and the first magnetic component 22 is blocked by the main shell 21. When the toothbrush handle 11 is separated from the charging seat 20, the first magnetic component 22 is blocked by the main shell 21, thereby preventing the first magnetic component 22 from being separated from the charging seat 20 along with the toothbrush handle 11, thereby ensuring the stability of the charging seat 20 structure.

[0053] In some embodiments of the present application, the first magnetic elements 22 are provided in at least pairs and are located on both sides of the ejector assembly 23 .

[0054] After the toothbrush handle 11 of the electric toothbrush 10 is placed in the charging stand 20, the ejector assembly 23 is docked with the charging contact 14 in the electric toothbrush 10, so that the charging stand 20 can charge the electric toothbrush 10. The first magnetic members 22 are arranged in pairs, and the paired first magnetic members 22 are arranged on both sides of the ejector assembly 23, so that the paired first magnetic members 22 fix the electric toothbrush 10 from both sides of the ejector assembly 23, thereby improving the reliability of the conduction between the ejector assembly 23 and the charging contact 14 in the electric toothbrush 10, and further improving the reliability of the charging process of the electric toothbrush 10 by the charging stand 20.

[0055] In some embodiments of the present application, the first magnetic member 22 is in a cubic shape.

[0056] The shape of the first magnetic member 22 is set to be a cube, so that the first magnetic member 22 has a larger effective magnetic attraction area, thereby improving the magnetic attraction effect of the first magnetic member 22 in a limited space.

[0057] In some embodiments of the present application, the first magnetic attraction member 22 may include a permanent magnet.

[0058] The permanent magnet, the electromagnet or the ferromagnetic material in the toothbrush handle 11 can be magnetically attracted by the permanent magnet, thereby fixing the toothbrush handle 11 .

[0059] In some embodiments of the present application, the first magnetic attraction member 22 may include an electromagnet.

[0060] The permanent magnet, electromagnet or ferromagnetic material in the toothbrush handle 11 can be magnetically attracted by the electromagnet to fix the toothbrush handle 11. An adjustment device can also be provided to adjust the magnetic attraction of the electromagnet so that the charging stand 20 can effectively fix the electric toothbrush 10 and can easily detach the electric toothbrush 10 from the charging stand 20.

[0061] In some embodiments of the present application, the first magnetic attraction member 22 may include a ferromagnetic material.

[0062] The ferromagnetic material can be magnetically attracted by the permanent magnet or electromagnet in the toothbrush handle 11, thereby fixing the toothbrush handle 11.

[0063] In some embodiments of the present application, the ejector assembly 23 includes an ejector member 231 and a fixing member 232. The fixing member 232 is combined with the ejector member 231 by in-mold injection molding.

[0064] The fixing member 232 is combined with the ejector member 231 by in-mold injection molding, thereby avoiding a gap between the fixing member 232 and the ejector member 231 , thereby improving the water tightness of the ejector assembly 23 .

[0065] In some embodiments of the present application, the ejector pin 231 may include a Pogopin ejector pin.

[0066] The Pogopin uses a copper column design, which is waterproof and not easily penetrated by water.

[0067] In some embodiments of the present application, the main housing 21 is provided with a waterproof groove 212 , the ejector assembly 23 is installed in the waterproof groove 212 , and the inner wall of the waterproof groove 212 limits the fixing member 232 .

[0068] The waterproof groove 212 is used to limit the ejector assembly 23, thereby improving the stability of the ejector assembly 23 structure, so that the charging stand 20 can be reliably and stably docked with the toothbrush handle 11, and improving the reliability and stability of the charging function of the charging stand 20. The waterproof groove 212 separates the ejector assembly 23 from other structures in the charging stand 20, thereby preventing external moisture from entering the charging stand 20, and improving the waterproof performance of the charging stand 20.

[0069] In some embodiments of the present application, the waterproof groove 212 is filled with sealant.

[0070] The interface of the charging stand 20 is sealed by sealant to further improve the waterproof performance of the charging stand 20.

[0071] In some embodiments of the present application, a limiting groove 213 is provided on one side of the main housing 21 facing the toothbrush handle 11, and the limiting groove 213 is used to limit the toothbrush handle 11. The ejector assembly 23 is at least partially exposed at the bottom of the limiting groove 213.

[0072] After the toothbrush handle 11 of the electric toothbrush 10 is placed in the charging seat 20, the toothbrush handle 11 is limited by the limiting groove 213 to prevent the toothbrush handle 11 from shaking or falling on the charging seat 20, so that the combination of the toothbrush handle 11 and the charging seat 20 is more reliable and stable. In addition, the toothbrush handle 11 is guided by the limiting groove 213 so that the toothbrush handle 11 can be connected with the ejector assembly 23 more quickly and reliably.

[0073] In some embodiments of the present application, a positioning groove 214 is provided at the bottom of the limiting groove 213 , and the ejector pin assembly 23 is within the range of the positioning groove 214 .

[0074] During the docking process between the charging stand 20 and the toothbrush handle 11, the protrusion at the bottom of the toothbrush handle 11 is guided by the inner wall of the positioning groove 214, so that the charging contact 14 can smoothly dock with the ejector assembly 23. When the charging stand 20 and the toothbrush handle 11 are docked in place, the protrusion at the bottom of the toothbrush handle 11 is inserted into the positioning groove 214, and then the protrusion at the bottom of the toothbrush handle 11 is limited by the inner wall of the positioning groove 214, thereby improving the stability of the combination of the electric toothbrush 10 and the charging stand 20.

[0075] In some embodiments of the present application, an anti-skid pad 24 is installed at the bottom of the main shell 21.

[0076] When the charging stand 20 is placed on a tabletop or sink, the anti-skid pad 24 prevents the charging stand 20 from sliding, thereby preventing the electric toothbrush 10 on the charging stand 20 from shaking or falling due to the sliding of the charging stand 20, thereby improving the safety and reliability of the charging stand 20 in carrying the electric toothbrush 10.

[0077] On the other hand, see Figures 5 and 6 In some embodiments of the present application, the present application further provides an electric toothbrush 10, which is charged by the above-mentioned charging seat 20, and includes: a toothbrush handle 11 and a second magnetic member 15. The toothbrush handle 11 is provided with a charging contact 14, and the charging contact 14 is adapted to the ejector assembly 23. The second magnetic member 15 is provided at one end of the toothbrush handle 11 close to the charging seat 20, and the second magnetic member 15 and the first magnetic member 22 can be attracted to each other.

[0078] When the electric toothbrush 10 is charged through the charging stand 20, the charging contact 14 is docked with the ejector assembly 23, so that the electric energy from the charging stand 20 can be smoothly transmitted to the battery in the electric toothbrush 10, and then the electric toothbrush 10 is charged through the charging stand 20. The electric toothbrush 10 is firmly combined with the charging stand 20 through the mutual adsorption of the first magnetic attraction member 22 and the second magnetic attraction member 15.

[0079] In some embodiments of the present application, the shapes of the first magnetic member 22 and the second magnetic member 15 can both be set to be cubic.

[0080] The shapes of the first magnetic member 22 and the second magnetic member 15 are both set to be cube-shaped, so that there is a larger effective magnetic attraction area between the first magnetic member 22 and the second magnetic member 15, thereby improving the magnetic attraction effect between the first magnetic member 22 and the second magnetic member 15 in a limited space.

[0081] In some embodiments of the present application, the second magnetic attraction member 15 may include at least one of an electromagnet, a permanent magnet or a ferromagnetic material. The first magnetic attraction member 22 may include at least one of an electromagnet, a permanent magnet or a ferromagnetic material.

[0082] When the second magnetic member 15 includes a ferromagnetic material, the first magnetic member 22 may include an electromagnet or a permanent magnet.

[0083] When the first magnetic member 22 includes a ferromagnetic material, the second magnetic member 15 may include an electromagnet or a permanent magnet.

[0084] In some embodiments of the present application, the toothbrush handle 11 is provided with a limiting protrusion 12 , and the main shell 21 is provided with a limiting groove 213 , and the limiting protrusion 12 is adapted to the limiting groove 213 .

[0085] The cooperation between the limiting protrusion 12 and the limiting groove 213 prevents the toothbrush handle 11 from shaking or falling on the charging seat 20, making the combination of the toothbrush handle 11 and the charging seat 20 more reliable and stable. The limiting groove 213 guides the toothbrush handle 11, so that the toothbrush handle 11 can be connected with the ejector assembly 23 more quickly and reliably.

[0086] In some embodiments of the present application, the main housing 21 is provided with a positioning groove 214, and the ejector assembly 23 is within the range of the positioning groove 214. The toothbrush handle 11 is provided with a positioning protrusion 13, and the charging contact 14 is within the range of the positioning protrusion 13. The positioning protrusion 13 is adapted to the positioning groove 214, and the height of the positioning protrusion 13 is less than the diameter of the charging contact 14.

[0087] During the docking process between the charging stand 20 and the toothbrush handle 11, the positioning protrusion 13 is guided by the inner wall of the positioning groove 214, so that the charging contact 14 can smoothly dock with the ejector assembly 23. When the charging stand 20 and the toothbrush handle 11 are docked in place, the positioning protrusion 13 is inserted into the positioning groove 214, and then the positioning protrusion 13 is limited by the inner wall of the positioning groove 214, thereby improving the stability of the combination of the electric toothbrush 10 and the charging stand 20. By limiting the height of the positioning protrusion 13, it is avoided that the insertion depth of the positioning protrusion 13 in the positioning groove 214 is too deep, which makes it inconvenient to plug and unplug the electric toothbrush 10 at the charging stand 20, thereby improving the convenience of plugging and unplugging the electric toothbrush 10 at the charging stand 20.

[0088] In the description of this specification, the description with reference to the terms "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0089] In addition, the above description is only a preferred embodiment of the utility model, and is not intended to limit the utility model. Any modifications, equivalent replacements and improvements made within the spirit and principle of the utility model shall be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.

Claims

1. A charging stand for charging an electric toothbrush, characterized in that: include: A main housing, the main housing being used to carry at least a toothbrush handle of the electric toothbrush; A first magnetic attraction member, the first magnetic attraction member is disposed in the main housing, and the first magnetic attraction member is used to attract the toothbrush handle; The first magnetic attraction component is arranged in the main shell, and the thimble assembly is at least partially exposed from the main shell. The thimble assembly is used to dock with the toothbrush handle so that the charging seat can charge the electric toothbrush.

2. The charging stand according to claim 1, characterized in that: A fixing groove is provided on a side of the main shell facing away from the toothbrush handle, and the first magnetic attraction member is installed in the fixing groove.

3. The charging stand according to claim 1, characterized in that: The first magnetic elements are arranged in at least pairs and are located on both sides of the ejector assembly.

4. The charging stand according to claim 1, characterized in that: The ejector pin assembly comprises: Ejector parts; A fixing part is combined with the ejector part by means of in-mold injection molding.

5. The charging stand according to claim 4, characterized in that: A waterproof groove is provided in the main shell, the ejector assembly is installed in the waterproof groove, and the inner wall of the waterproof groove limits the fixing member.

6. The charging stand according to claim 5, characterized in that: A limiting groove is provided on one side of the main housing facing the toothbrush handle, and the limiting groove is used to limit the toothbrush handle; The ejector pin assembly is at least partially exposed at the bottom of the limiting groove.

7. The charging stand according to claim 6, characterized in that: A positioning groove is arranged at the bottom of the limiting groove, and the ejector pin assembly is within the range of the positioning groove.

8. The charging stand according to claim 1, characterized in that: An anti-skid pad is installed at the bottom of the main shell.

9. An electric toothbrush, characterized in that: Charging by a charging base as described in any one of claims 1 to 8, comprising: A toothbrush handle, wherein the toothbrush handle is provided with a charging contact, and the charging contact is adapted to the ejector assembly; The second magnetic attraction component is arranged at one end of the toothbrush handle close to the charging seat, and the second magnetic attraction component and the first magnetic attraction component can be attracted to each other.

10. The electric toothbrush according to claim 9, characterized in that: The toothbrush handle is provided with a positioning protrusion, and the charging contact is within the range of the positioning protrusion; The positioning protrusion is matched with the positioning groove of the main shell of the charging seat, and the height of the positioning protrusion is smaller than the diameter of the charging contact.

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