Bottom cover assembly and electric toothbrush

Abstract

The utility model discloses a bottom cover assembly and an electric toothbrush, and the bottom cover assembly comprises a bottom cover which is provided with a storage cavity; the wireless charging module is arranged in the storage cavity; the magnet is arranged in the storage cavity, and the magnet and the wireless charging module are arranged at an interval; and the shielding structure is provided with a first shielding part which extends into the interval. According to the arrangement, a charging structure is prevented from being exposed and corroded by adopting a wireless charging mode, and meanwhile, the connection stability during charging is ensured, and electromagnetic interference is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of toothbrushes, and in particular to a bottom cover assembly and an electric toothbrush. Background Art

[0002] The electric toothbrush uses an internal battery to power the motor, and the motor drives the toothbrush head to swing or vibrate to clean the oral cavity. In the prior art, the electric toothbrush uses a PIN pin to charge the battery. However, since one end of the PIN pin is always exposed outside the housing of the electric toothbrush, the exposed end of the PIN pin is easily corroded when it comes into contact with various substances, thereby affecting normal charging. Utility Model Content

[0003] The main purpose of this application is to propose a bottom cover assembly and an electric toothbrush, which are intended to adopt wireless charging to avoid exposing the charging structure to the outside, while ensuring the connection stability during charging and avoiding electromagnetic interference.

[0004] To achieve the above objectives, the present application proposes a bottom cover assembly, comprising:

[0005] A bottom cover, the bottom cover having a storage cavity;

[0006] A wireless charging module is disposed in the storage cavity;

[0007] a magnet, disposed in the storage cavity, the magnet being spaced apart from the wireless charging module; and,

[0008] A shielding structure has a first shielding portion extending into the gap.

[0009] In one embodiment, the wireless charging module includes a coil, the magnet is located outside the coil in a radial direction, and the first shielding portion is disposed around the coil.

[0010] In one embodiment, the bottom cover assembly includes a plurality of the magnets, and the plurality of the magnets are distributed at intervals along the circumference of the coil.

[0011] In one embodiment, the shielding structure has a plurality of the first shielding parts, the plurality of the first shielding parts are arranged in a one-to-one correspondence with the plurality of the magnets, and the chord length of the first shielding part is greater than the chord length of the magnet.

[0012] In one embodiment, the magnet extends around the circumference of the coil to form an arc shape.

[0013] In one embodiment, the shielding structure further includes a second shielding portion, which is disposed in a hollow area formed by the coil being wound, and the second shielding portion is ring-shaped.

[0014] In one embodiment, the wireless charging module includes a coil, the magnet is located in a hollow area formed by the coil, and the first shielding portion is arranged in a ring shape around the magnet.

[0015] In one embodiment, the shielding structure further includes a magnetic conductive portion, the magnetic conductive portion is located at one axial end of the coil, and the first shielding portion is integrally provided with the magnetic conductive portion.

[0016] In one embodiment, a cavity wall of the storage cavity is provided with a fixing groove, and the bottom of the magnet is embedded in the fixing groove.

[0017] In one embodiment, a cavity wall of the storage cavity is provided with a plurality of limiting protrusions, and a magnet is provided between two adjacent limiting protrusions and respectively abuts against ends of the magnet.

[0018] The present application also provides an electric toothbrush, comprising:

[0019] A handle shell, wherein the handle shell is a long cylindrical structure; and

[0020] A bottom cover assembly is provided, wherein the bottom cover seals and covers the lower end opening of the handle housing, and the storage cavity is open upward and communicated with the interior of the handle housing.

[0021] In one embodiment, the electric toothbrush also includes a handle inner shell, a motor and a battery located inside the handle outer shell, the motor and the battery are distributed in the up and down directions and accommodated in the handle inner shell, the magnetic conductive portion of the shielding structure is clamped between the handle inner shell and the wireless charging module, and the wireless charging module abuts against the bottom surface of the bottom cover.

[0022] In one embodiment, a positioning groove is provided at the bottom of the handle inner shell, and the magnetic conductive part is embedded in the positioning groove.

[0023] In one embodiment, a plurality of positioning protrusions are provided at the bottom of the handle inner shell, and the plurality of positioning protrusions are spaced apart and distributed around the shielding structure to jointly enclose the positioning groove, and the magnet is arranged corresponding to the interval between two adjacent positioning protrusions.

[0024] In one embodiment, the handle inner shell is provided with a first buckle, and the bottom cover is provided with a second buckle, and the second buckle extends upward from the storage cavity and is engaged with the first buckle;

[0025] The magnet is located at the periphery of the wireless charging module and is arranged in a circumferential direction of the bottom cover away from the second buckle.

[0026] In one embodiment, the handle inner shell comprises an inner shell body, a reinforcement portion and a connection portion, the inner shell body is used to accommodate the motor and the battery, the reinforcement portion connects two opposite inner side walls at the bottom of the inner shell body, two second buckles are distributed along two connection points between the reinforcement portion and the inner shell body, and the first buckle is arranged at the bottom of the inner shell body and extends downward and protrudes from the bottom surface of the inner shell body;

[0027] The connecting portion is connected to the bottom surface of the reinforcing portion, and the bottom surface of the connecting portion is formed with the positioning groove.

[0028] In one embodiment, the electric toothbrush further comprises a shock-absorbing pad, and the upper surface of the magnetic conductive portion abuts against the inner shell of the handle through the shock-absorbing pad.

[0029] In one embodiment, a limiting groove is provided at the lower end of the handle inner shell for the limiting protrusion of the bottom cover to be inserted.

[0030] The technical solution in the embodiment of the present application uses a wireless charging module to achieve wireless charging. The arrangement of the magnet can improve the connection stability between the bottom cover assembly and the charging stand through magnetic attraction with the magnetic structure on the charging stand, and reduce the risk of the bottom cover assembly falling during charging. By isolating the magnet using a shielding structure, the interference of the magnet on wireless charging is reduced, and the heating phenomenon caused by the interference between the magnet and the wireless charging is avoided, thereby ensuring the efficiency of wireless charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 This is an exploded schematic diagram of the bottom cover assembly in the embodiment of the present application;

[0033] Figure 2 for Figure 1 Schematic diagram of the assembly of the midsole cover assembly;

[0034] Figure 3 for Figure 2 A schematic plan view of the midsole cover assembly;

[0035] Figure 4 for Figure 3 A schematic cross-sectional view of the midsole cover assembly along line AA;

[0036] Figure 5a and Figure 5b for Figure 1 Schematic diagram of the structure of the magnetic conductor at different angles;

[0037] Figure 6 for Figure 1 A schematic diagram of the structure of the midsole cover;

[0038] Figure 7 for Figure 6 Schematic diagram of the cutaway of the midsole cover, the cutaway position is Figure 3 AA line in the middle;

[0039] Figure 8 This is a structural schematic diagram of a bottom cover assembly in another embodiment of the present application;

[0040] Fig. 9 for Figure 8 A schematic cross-sectional view of a midsole cover assembly;

[0041] Fig.10 This is a schematic diagram of the structure of the electric toothbrush and the charging stand in the embodiment of the present application;

[0042] Fig.11 for Fig.10 Schematic diagram of the internal structure of an electric toothbrush;

[0043] Fig.12 10 is a plan view of the structure;

[0044] Fig.13 for Fig.12 Schematic diagram of the cross section of the middle structure at line BB;

[0045] Fig.14 for Fig.13 The enlarged view of point D in the middle;

[0046] Fig.15 for Fig.11 Schematic diagram of the assembly of the inner shell of the middle handle, the magnetic conductor and the coil;

[0047] Fig.16 for Fig.15 Enlarged view of point E in the middle;

[0048] Fig.17 for Fig.15 A schematic diagram of the structure of the inner shell of the middle handle;

[0049] Fig.18 for Fig.15 Schematic diagram of the structure of the inner shell of the middle handle at another angle.

[0050] Description of Figure Numbers:

[0051] Label name Label name Label name 100 Bottom cover assembly 33 First shielding part 83 First buckle 10 Bottom cover 301 Annular groove 84 Limit groove 11 Storage cavity 41 Magnetic Conductivity 85 Inner shell body 12 / 13 Fixed slot 42 Ring bulge 86 Strengthening Department 14 Limiting protrusion 42 First shielding part 87 Connection 15 Second buckle 60 magnet 91 Motor 20 Coil 70 Handle housing 92 Battery 30 / 40 Shielding structure 80 Handle inner shell 93 Shock absorber 31 Magnetic Conductivity 81 Positioning groove 94 Sealing ring 32 Second shielding part 82 Positioning protrusion 200 Electric toothbrush 300 Charging station DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0053] It should be noted that, in the description of this application, if the terms "first", "second", etc. appear, "first" and "second" are only used to facilitate the description of different components or names, and cannot be understood as indicating or implying a sequential relationship, relative importance, or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" appears in the full text, its meaning is that it includes three parallel solutions, taking "A and / or B as an example", including Solution A, or Solution B, or a solution that satisfies both A and B.

[0054] Please refer to Figures 1 to 4 , Figure 8 and Fig. 9 The embodiment of the present application proposes a bottom cover assembly 100, including a bottom cover 10, a wireless charging module and a magnet 60. The bottom cover 10 has a storage cavity 11. The wireless charging module and the magnet 60 are located in the storage cavity 11. The wireless charging module and the magnet 60 are arranged at intervals.

[0055] by Fig.10 Take the electric toothbrush 200 in the figure as an example, the bottom cover assembly 100 is a part of the electric toothbrush 200 and is located at the bottom of the electric toothbrush 200. The technical solution in the embodiment of the present application adopts the structure of the wireless charging module to charge the electric toothbrush 200. The setting of the magnet 60 can improve the connection stability between the electric toothbrush 200 and the charging stand 300 through magnetic attraction with the magnetic structure on the charging stand 300, and reduce the risk of the electric toothbrush 200 falling during charging. The wireless charging module and the magnet 60 are arranged close to the bottom of the electric toothbrush 200, so when the electric toothbrush 200 is docked with the charging stand 300, the wireless charging magnetic field generated by the wireless charging module and the magnet 60 are closer to the charging stand 300 at the bottom, the distance is closer, and the effect of wireless charging is better. In addition, the distance between the magnet 60 and the magnetic component on the charging stand 300 is closer, the magnetic attraction is greater, and the magnetic attraction effect is better. The magnet 60 and the wireless charging module are arranged horizontally so that both the magnet 60 and the wireless charging module can be close to the bottom of the handle housing 70 at the same time, ensuring that the distance between both and the charging seat 300 is relatively close.

[0056] The wireless charging module includes a coil 20. Optionally, the magnet 60 and the coil 20 are spaced apart and distributed along the radial direction of the coil 20. There are many specific distribution modes of the coil 20 and the magnet 60. In the first embodiment, please refer to Figures 1 to 4 , the magnet 60 is located outside the radial direction of the coil 20. Specifically, the coil 20 is wound around an axis in the up-down direction, and the magnet 60 is arranged outside the coil 20, away from the center of the magnetic field generated by the coil 20. The magnetic lines of force (generated by the coil 20) at the location of the magnet 60 are relatively sparse, and the interference to the wireless charging is relatively small. Therefore, the magnetic field generated by the coil 20 is relatively stable, and has a better wireless charging effect.

[0057] In some embodiments, the magnet 60 extends circumferentially around the coil 20 to form an arc, and the magnet 60 can make full use of the space around the coil 20 for arrangement, the space utilization is reasonable, and the structure is more compact. Optionally, the bottom cover assembly 100 includes a plurality of magnets 60, and the plurality of magnets 60 are distributed at intervals along the circumference of the coil 20. For example, the bottom cover assembly 100 includes two magnets 60, and the two magnets 60 are located on two opposite sides of the radial direction of the coil 20. Therefore, the two magnets 60 are approximately symmetrically arranged with the axis of the coil 20 as the center, and when they are magnetically matched with the charging stand 300, they are symmetrically stressed in the horizontal direction, and the magnetic attraction effect is better. At the same time, compared with a magnet 60 arranged in a full circle around the coil 20, the two magnets 60 in this embodiment can not only meet a better magnetic attraction effect, but also reduce interference with the coil 20 during wireless charging.

[0058] Of course, in some embodiments, some shielding structures are provided to shield the interference of the magnet 60 on the coil 20, so the magnet 60 can also be provided as a full-circle ring structure. In addition, in other embodiments, more magnets 60 can also be provided to have a better magnetic attraction effect.

[0059] Please refer to Figure 8 and Fig. 9 In the second embodiment, the magnet 60 is located in the hollow area formed by the coil 20. In this way, the coil 20 is wound around the magnet 60, and the magnet 60 can make full use of the hollow area formed by the coil 20, and the fit between the two is more compact, which is conducive to reducing the size of the whole machine.

[0060] In the embodiment of the present application, the axis of the coil 20 is parallel to the up-down direction, and parallel means parallel or substantially close to parallel.

[0061] When wireless charging is performed, a magnetic field is generated, and the magnet 60 will interfere with the magnetic field, thereby affecting the efficiency of wireless charging. In order to reduce the interference of the magnet 60 on wireless charging, a shielding structure 30 / 40 is further provided at the interval between the magnet 60 and the wireless charging module. The shielding structure 30 / 40 has a first shielding portion 33 / 42, and the first shielding portion 33 / 42 extends into the interval between the magnet 60 and the wireless charging module to isolate the magnet 60 from the wireless charging module, and use its own shielding characteristics to isolate the magnet 60, reduce the interference of the magnet 60 on wireless charging, avoid the heating phenomenon caused by the interference between the magnet 60 and the wireless charging, and ensure the efficiency of wireless charging.

[0062] When the magnet 60 and the coil 20 are spaced apart from each other in the radial direction of the coil 20 , the first shielding portion 33 / 42 isolates the magnet 60 and the coil 20 in the radial direction of the coil 20 .

[0063] Please refer to Figure 4 , Figure 5a and Figure 5b When the magnet 60 is located outside the coil 20 in the radial direction, the first shielding portion 33 is located outside the coil 20 and is arranged around the coil 20. The first shielding portion 33 can be a complete ring, or the first shielding portion 33 is arc-shaped. Optionally, a plurality of magnets 60 and a plurality of first shielding portions 33 are provided, and the two are arranged one by one.

[0064] In some embodiments, the chord length of the first shielding portion 33 is greater than the chord length of the magnet 60 , and thus the first shielding portion 33 may completely cover the magnet 60 in the circumferential direction of the coil 20 .

[0065] Furthermore, the shielding structure 30 further includes a second shielding portion 32, which is disposed in a hollow area formed by the coil 20, and is annular in shape. Thus, the second shielding portion 32 can restrict the leakage magnetic flux of the coil 20 from diffusing inwards on the inner side of the coil 20.

[0066] Please refer to Figure 5a and Figure 5bIn some embodiments, the shielding structure 30 has an annular groove 301, the coil 20 is located in the annular groove 301, the magnet 60 is located outside the annular groove 301, the outer groove wall of the annular groove 301 constitutes a first shielding portion 33, and the inner groove wall of the annular groove 301 constitutes a second shielding portion 32. In this embodiment, the annular groove 301 can limit the coil 20, which is convenient for the installation and positioning of the coil 20. At the same time, each groove wall of the annular groove 301 can protect the coil 20 and reduce the possibility of the coil 20 being damaged by contact with other parts. The magnet 60 is located on the outer side of the coil 20 in the radial direction, and the magnet 60 and the coil 20 are separated in the horizontal direction by the side groove wall of the annular groove 301. By making full use of the space formed in the shielding structure 30, the installation, positioning and shielding of the coil 20 are achieved at the same time, and the structure is more compact.

[0067] Specifically, the shielding structure 30 includes a magnetic conductive portion 31, a central protrusion and a plurality of edge protrusions, wherein the central protrusion is arranged at the central area of ​​the bottom surface of the magnetic conductive portion 31, the edge protrusion is arranged at the edge of the bottom surface of the magnetic conductive portion 31, and the plurality of edge protrusions are distributed at intervals along the circumference of the magnetic conductive portion 31, and the space between the central protrusion and the edge protrusion constitutes an annular groove 301. There are a plurality of magnets 60, and the plurality of magnets 60 are arranged one by one with the plurality of edge protrusions, the edge protrusions constitute the first shielding portion 33, and the central protrusion constitutes the second shielding portion 32. In this embodiment, the magnet 60 extends around the coil 20 to form an arc, and the edge protrusion is also arc-shaped. The chord length of the magnet 60 is less than or equal to the chord length of the edge protrusion, so that the two ends of the magnet 60 can be completely shielded by the edge protrusion, and a better shielding effect is achieved. At the position where the edge protrusion is not arranged on the magnetic conductive portion 31, a space for accommodating other structures can be provided, further improving the compactness of the structure. In addition, the setting of the central protrusion can provide center positioning for the coil 20.

[0068] In other embodiments, the shielding structure 30 may be provided with an edge protrusion, and the edge protrusion is a closed ring structure.

[0069] Optionally, the magnetic conductive portion 31 may be an annular structure and be coaxially disposed with the coil 20 .

[0070] Please refer to Fig. 9 In some embodiments, the shielding structure 40 includes a magnetic conductive portion 41 and an annular protrusion 42. The magnetic conductive portion 41 is arranged in close contact with one end of the coil 20. The annular protrusion 42 is connected to the side of the magnetic conductive portion 41 facing the coil 20. The annular protrusion 42 extends into the hollow area formed by the coil 20. The magnet 60 is located in the hollow area and in the annular protrusion 42. In this embodiment, the annular protrusion 42 constitutes the first shielding portion 42. Optionally, the magnetic conductive portion 41 may be annular and arranged on the upper end surface of the coil 20. The annular protrusion 42 is arranged at the edge of the middle through hole of the magnetic conductive portion 41 and extends downward.

[0071] The shielding structure 30 / 40 in the above embodiment also includes a magnetic conductive part 31 / 41, which is located at one axial end of the coil 20 and is used to conduct magnetism to the coil, enhance the magnetic field, and improve the efficiency of wireless charging. The first shielding part 33 / 42 is integrally arranged with the magnetic conductive part 31 / 41. When the second shielding part 32 is provided, the second shielding part 32 is also integrally arranged with the magnetic conductive part 31 / 41. In the embodiment of the present application, the shielding structure 30 / 40 is used as a shielding component between the coil 20 and the magnet 60, and also as a magnetic conductive component of the coil 20, playing a dual role and reducing the setting of parts. The shielding structure 30 / 40 specifically adopts a structure with a magnetic conductive function, such as ferrite.

[0072] Please refer to Figure 6 , Figure 7 and Fig. 9 In order to limit the position of the magnet 60, in some embodiments, the cavity wall of the storage cavity 11 is provided with a fixing groove 12, and the bottom of the magnet 60 is embedded in the fixing groove 12. The groove depth of the fixing groove 12 can be shallow, which only has the effect of circumferentially limiting the magnet 60, and at the same time performs pre-positioning installation on the magnet 60. In order to prevent the magnet 60 from moving relative to the bottom cover 10, the magnet 60 and the bottom cover 10 can also be bonded and fixed. Alternatively, the bottom surface of the handle inner shell 80 (described in the following embodiments) can also abut against the magnet 60, thereby preventing the magnet 60 from moving in the up and down directions.

[0073] Furthermore, the cavity wall of the storage cavity 11 is provided with a plurality of limiting protrusions 14 , and a magnet 60 is provided between two adjacent limiting protrusions 14 and respectively abuts against the ends of the magnet 60 . In this way, the two ends of the magnet 60 are limited by the two limiting protrusions 14 .

[0074] When there is only one magnet 60 and it is disposed inside the coil 20, a circle of surrounding walls can be disposed inside the bottom wall of the bottom cover 10, and the surrounding walls enclose the fixing groove 12. The height of the surrounding wall can be relatively large, and the magnet 60 is basically enclosed therein.

[0075] When there are multiple magnets 60 and they are disposed outside the coil 20 , a plurality of fixing grooves 12 may be disposed inside the bottom wall of the bottom cover 10 , and the plurality of fixing grooves 12 are distributed at intervals along the circumference of the bottom cover 10 .

[0076] Please refer to Fig.10 The embodiment of the present application also proposes an electric toothbrush 200, which includes a handle shell 70 and a bottom cover assembly 100. The handle shell 70 is a long cylindrical structure, and the bottom cover 10 seals and covers the lower end opening of the handle shell 70. The storage cavity 11 is open upward and communicates with the interior of the handle shell 70.

[0077] In the embodiment of the present application, the handle housing 70 may be cylindrical, elliptical, or a cylindrical structure that is approximately circular.

[0078] Please refer to Figures 11 to 14 Furthermore, the electric toothbrush 200 further includes a handle inner shell 80, a motor 91 and a battery 92. The motor 91 and the battery 92 are distributed in the up-down direction and housed in the handle inner shell 80. The handle inner shell 80 is located in the handle outer shell 70. The shielding structure 30 / 40 is clamped between the handle inner shell 80 and the coil 20, and the coil 20 abuts against the bottom surface of the bottom cover 10. In this way, in the up-down direction, the shielding structure 30 / 40 and the coil 20 are clamped and limited by the handle inner shell 80 and the bottom cover 10, and the lower end of the handle inner shell 80 is used for limiting, without the need to add other additional structural parts.

[0079] Please refer to Figures 15 to 18 In order to prevent the shielding structure 30 / 40 from moving, in some embodiments, a positioning groove 81 is provided at the bottom of the handle inner shell 80, and the shielding structure 30 / 40 is embedded in the positioning groove 81. Optionally, a plurality of positioning protrusions 82 are provided at the bottom of the handle inner shell 80, and the plurality of positioning protrusions 82 are distributed around the shielding structure 30 / 40 at intervals to enclose the positioning groove 81 together. In this way, a portion of space is reserved at the position where the positioning protrusion 82 is not provided (i.e., the interval between the two positioning protrusions 82) for accommodating other structures, so as to achieve the effect of reasonable use of space and compact structure. For example, the magnet 60 is provided corresponding to the interval between two adjacent positioning protrusions 82. Of course, in other embodiments, an annular protrusion can also be provided at the bottom of the handle inner shell 80 to enclose the positioning groove 81.

[0080] In some embodiments, the handle inner shell 80 is provided with a first buckle 83, and the bottom cover 10 is provided with a second buckle 15 (such as Figure 2 ), the second buckle 15 extends upward from the storage cavity 11 and is engaged with the first buckle 83. The magnet 60 is located at the periphery of the coil 20 and is arranged in the circumferential direction of the bottom cover 10 to avoid the second buckle 15, that is, the magnet 60 and the second buckle 15 are distributed at intervals along the circumference of the bottom cover 10, and the space can be reasonably arranged in the circumferential direction. Specifically, four positioning protrusions 82 can be set at the bottom of the handle inner shell 80, and there is a gap between every two adjacent positioning protrusions 82, so the four positioning protrusions 82 together form four gaps. Two of the gaps are each provided with a magnet 60, and the other two gaps avoid two second buckles 15 respectively.

[0081] In some embodiments, the handle inner shell 80 includes an inner shell body 85, a reinforcement part 86 and a connection part 87. The inner shell body 85 is used to store the motor 91 and the battery 92. The reinforcement part 86 connects the two opposite inner side walls at the bottom of the inner shell body 85, so the reinforcement part 86 and the two opposite inner side walls of the inner shell body 85 form two connection points. The two second buckles 15 are distributed along the two connection points between the reinforcement part 86 and the inner shell body 85. The first buckle 83 is arranged at the bottom of the inner shell body 85 and extends downward to protrude from the bottom surface of the inner shell body 85. The reinforcement part 86 can be plate-shaped or rod-shaped, which props up the two opposite inner side walls of the inner shell body 85 and strengthens the strength of the place. When the connection between the second buckle 15 and the inner shell body 85 is subjected to an inward pressing force, the arrangement of the reinforcement part 86 can prevent the two opposite sides of the inner shell body 85 from shrinking inward, thereby preventing the second buckle 15 and the first buckle 83 from being separated.

[0082] The connecting portion 87 is connected to the bottom surface of the reinforcing portion 86, and a positioning groove 81 is formed on the bottom surface of the connecting portion 87. Optionally, the connecting portion 87 may include a plurality of connecting ribs and a connecting bottom plate, one side of the connecting ribs is connected to the bottom surface of the reinforcing portion 86, and the connecting bottom plate is arranged on the other side of the connecting ribs. A positioning groove 81 is formed on the connecting bottom plate.

[0083] Furthermore, the electric toothbrush 200 also includes a shock-absorbing pad 93, and the upper surface of the shielding structure 30 / 40, i.e., the magnetic conductive part 31 / 41, abuts against the handle inner shell 80 through the shock-absorbing pad 93. The shock-absorbing pad 93 can be a material that has elasticity and can achieve a shock-absorbing effect, such as sponge or silicone. After the shock-absorbing pad 93 is provided, the vibration generated by the motor 91 at work can be absorbed by the shock-absorbing pad 93 when it is transmitted downward through the handle inner shell 80, thereby reducing the risk of vibration of the shielding structure 30 / 40, the coil 20 and the magnet 60. When a positioning groove 81 is provided at the bottom of the handle inner shell 80, the shock-absorbing pad 93 is completely accommodated in the positioning groove 81.

[0084] Furthermore, a limiting groove 84 is provided at the lower end of the handle inner shell 80 for the limiting protrusion 14 to be inserted. When installed, the limiting groove 84 on the handle inner shell 80 is inserted into the limiting protrusion 14, and the handle inner shell 80 and the bottom cover 10 are positioned in the circumferential direction, so that the positioning groove 81 at the bottom of the handle inner shell 80 can be aligned with the magnetic conductive part 31 / 41, and the positioning protrusion 82 at the bottom of the handle inner shell 80 can avoid the magnet 60. Furthermore, the limiting protrusion 14 is used to position the magnet 60 and the handle inner shell 80 at the same time, and one structure plays a dual role, and the positioning basis of the magnet 60 and the handle inner shell 80 is the same, thereby ensuring the positioning accuracy between the magnet 60 and the handle inner shell 80.

[0085] Furthermore, the shock-absorbing pad 93 can be bonded to the handle inner shell 80 and the shielding structure 30 / 40 respectively, the coil 20 is bonded to the bottom cover 10 , and the magnet 60 is also bonded to the bottom cover 10 .

[0086] Please refer to it again Figure 1 Furthermore, a sealing ring 94 is sleeved on the outer side of the bottom cover 10 to be sealed and connected with the inner side wall of the handle housing 70 .

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A bottom cover assembly, characterized in that: include: A bottom cover, the bottom cover having a storage cavity; A wireless charging module is disposed in the storage cavity; a magnet, disposed in the storage cavity, the magnet being spaced apart from the wireless charging module; and, A shielding structure has a first shielding portion extending into the gap.

2. The bottom cover assembly according to claim 1, characterized in that: The wireless charging module includes a coil, the magnet is located outside the coil in a radial direction, and the first shielding portion is arranged around the coil.

3. The bottom cover assembly according to claim 2, characterized in that: The bottom cover assembly includes a plurality of magnets, and the plurality of magnets are distributed at intervals along the circumference of the coil.

4. The bottom cover assembly according to claim 3, characterized in that: The shielding structure has a plurality of the first shielding parts, the plurality of the first shielding parts are arranged in a one-to-one correspondence with the plurality of the magnets, and the chord length of the first shielding part is greater than the chord length of the magnet.

5. The bottom cover assembly according to claim 2, characterized in that: The magnet extends around the circumference of the coil to form an arc shape.

6. The bottom cover assembly according to claim 2, characterized in that: The shielding structure further includes a second shielding portion, which is disposed in a hollow area formed by the coil being wound, and the second shielding portion is in a ring shape.

7. The bottom cover assembly according to claim 1, characterized in that: The wireless charging module includes a coil, the magnet is located in a hollow area formed by the coil, and the first shielding portion is arranged in a ring shape around the magnet.

8. The bottom cover assembly according to claim 2 or 7, characterized in that: The shielding structure further includes a magnetic conductive portion, the magnetic conductive portion is located at one axial end of the coil, and the first shielding portion is integrally provided with the magnetic conductive portion.

9. The bottom cover assembly according to any one of claims 1 to 7, characterized in that: The cavity wall of the storage cavity is provided with a fixing groove, and the bottom of the magnet is embedded in the fixing groove.

10. The bottom cover assembly according to claim 9, characterized in that: The cavity wall of the storage cavity is provided with a plurality of limiting protrusions, and a magnet is provided between two adjacent limiting protrusions and respectively abuts against the ends of the magnets.

11. An electric toothbrush, characterized in that: include: A handle shell, wherein the handle shell is a long cylindrical structure; and The bottom cover assembly according to any one of claims 1 to 10, wherein the bottom cover seals and covers the lower end opening of the handle housing, and the storage cavity is open upward and communicates with the interior of the handle housing.

12. The electric toothbrush according to claim 11, characterized in that The electric toothbrush also includes a handle inner shell, a motor and a battery located inside the handle outer shell. The motor and the battery are distributed in the up and down directions and are accommodated in the handle inner shell. The magnetic conductive portion of the shielding structure is clamped between the handle inner shell and the wireless charging module. The wireless charging module abuts against the bottom surface of the bottom cover.

13. The electric toothbrush according to claim 12, characterized in that A positioning groove is provided at the bottom of the handle inner shell, and the magnetic conductive part is embedded in the positioning groove.

14. The electric toothbrush according to claim 13, characterized in that A plurality of positioning protrusions are provided at the bottom of the handle inner shell. The plurality of positioning protrusions are spaced and distributed around the shielding structure to jointly enclose the positioning groove. The magnet is arranged corresponding to the interval between two adjacent positioning protrusions.

15. The electric toothbrush according to claim 14, characterized in that The handle inner shell is provided with a first buckle, and the bottom cover is provided with a second buckle, the second buckle extends upward from the storage cavity and is engaged with the first buckle; The magnet is located at the periphery of the wireless charging module and is arranged in a circumferential direction of the bottom cover away from the second buckle.

16. The electric toothbrush according to claim 15, characterized in that The handle inner shell comprises an inner shell body, a reinforcement part and a connection part, the inner shell body is used to store the motor and the battery, the reinforcement part connects two opposite inner side walls at the bottom of the inner shell body, two second buckles are distributed along two connection points between the reinforcement part and the inner shell body, and the first buckle is arranged at the bottom of the inner shell body and extends downward and protrudes from the bottom surface of the inner shell body; The connecting portion is connected to the bottom surface of the reinforcing portion, and the bottom surface of the connecting portion is formed with the positioning groove.

17. The electric toothbrush according to any one of claims 12 to 16, characterized in that: The electric toothbrush further comprises a shock absorbing pad, and the upper surface of the magnetic conductive part abuts against the inner shell of the handle through the shock absorbing pad.

18. The electric toothbrush according to claim 12, characterized in that A limiting groove is provided at the lower end of the handle inner shell for the limiting protrusion of the bottom cover to be inserted.

Images