Internal support for electric toothbrush and electric toothbrush

Abstract

The utility model provides an internal support for an electric toothbrush and the electric toothbrush, the internal support comprises a first support and a second support, and the first support and the second support are buckled with each other and cover a motor and a battery; damping parts are arranged on the inner sides, close to the motor and the battery, of the first support and the second support, are integrally formed on the first support and the second support and make contact with and buffer at least one of the motor and the battery. According to the internal support and the electric toothbrush, the overall structure can be more compact, the integrity is higher, the stability is better, vibration and noise can be reduced, and the use comfort of a user is further improved.

Description

Technical Field

[0001] The present application relates to the technical field of electric toothbrushes, and specifically relates to an internal bracket for an electric toothbrush and an electric toothbrush. Background Art

[0002] With the improvement of people's living standards, as personal care electronic products, oral cleaning appliances such as electric toothbrushes are widely welcomed by people. Generally, an electric toothbrush may include a motor and a brush head. The motor may be connected to the brush head through an output shaft to drive the brush head to vibrate through the motor, thereby cleaning the user's oral cavity.

[0003] The internal bracket of the electric toothbrush is used to fix the internal structure. The existing internal bracket design is unreasonable, resulting in relatively large vibration and noise of the electric toothbrush, and the user experience is not good, which needs to be improved. Summary of the Utility Model

[0004] The present application provides an internal bracket for an electric toothbrush and an electric toothbrush, which can at least solve some problems in the background art and can reduce vibration and noise.

[0005] The present application provides an internal bracket for an electric toothbrush. The internal bracket includes a first bracket and a second bracket. The first bracket and the second bracket are mutually buckled and cover the motor and the battery.

[0006] Damping portions are provided on the inner sides of the first bracket and the second bracket close to the motor and the battery. The damping portions are integrally formed on the first bracket and the second bracket, and the damping portions contact and buffer at least one of the motor or the battery.

[0007] For the internal bracket for an electric toothbrush provided by the present application, the first bracket and the second bracket are mutually buckled and cover the motor and the battery, so that the first bracket, the second bracket, the motor and the battery have better integrity and the structure is more compact. Since the structure is relatively not loose, the resonance generated by vibration on each component is relatively small, which is beneficial to reducing vibration and noise as a whole; and the damping portions integrally formed on the first bracket and the second bracket have better stability and can better realize the functions of damping and noise reduction.

[0008] In one implementation, the internal bracket includes a motor fixing portion for fixing the motor and a battery fixing portion for fixing the battery. When the second bracket is buckled and fixed with the first bracket, the inner cross-sectional area of the battery fixing portion is larger than the inner cross-sectional area of the motor fixing portion.

[0009] With such a setting, both the relatively smaller motor and the relatively larger battery can be fixed relatively tightly by the first bracket and the second bracket, further improving the integrity of the internal bracket, the motor and the battery. When the motor generates vibration, due to better integrity, it is not easy to be transmitted to the handle housing, which is also beneficial to reducing noise and improving the use comfort.

[0010] In one embodiment, the first bracket includes a part of the motor fixing portion and a part of the battery fixing portion, and the second bracket includes another part of the motor fixing portion and another part of the battery fixing portion; the motor fixing portion and the battery fixing portion in the second bracket are in a stepped transition. When the second bracket is fastened and fixed to the first bracket,

[0011] the width of the motor fixing portion formed by the second bracket and the first bracket in the fastening direction is smaller than the width of the battery fixing portion formed by the second bracket and the first bracket in the fastening direction.

[0012] With such a setting, both the relatively smaller motor and the relatively larger battery can be fixed more tightly by the first bracket and the second bracket, further improving the integrity of the internal bracket, the motor and the battery. When the motor generates vibration, due to better integrity, it is not easy to transfer to the handle shell, which is also beneficial to reducing noise and improving the use comfort.

[0013] In one embodiment, the shock-absorbing portion of the first bracket contacts the motor;

[0014] the shock-absorbing portion of the second bracket contacts the motor and the battery.

[0015] With such a setting, the shock-absorbing portion of the first bracket and the shock-absorbing portion of the second bracket can jointly and preferably contact the motor, so as to fully perform shock-absorbing contact on the main vibration source, which is beneficial to reducing vibration and noise; and the shock-absorbing portion of the second bracket abuts against the battery, playing a certain buffering role, which is beneficial to protecting the battery. Therefore, whether during the installation process or when the electric toothbrush falls during use, the shock-absorbing portion can provide good protection for the battery, which is beneficial to improving the service life of the electric toothbrush.

[0016] In one embodiment, the shock-absorbing portion of the first bracket and the shock-absorbing portion of the second bracket surround the motor in the circumferential direction;

[0017] the shock-absorbing portion of the second bracket contacts one side of the battery.

[0018] With such a setting, the motor is basically surrounded by the shock-absorbing portion in the circumferential direction. Furthermore, no matter which direction the motor vibrates, the vibration and noise can be reduced to some extent; and the side of the shock-absorbing portion of the second bracket that contacts the battery enables the battery to be effectively protected during the installation process, and there is no need to set more buffer structures, which is beneficial to reducing the volume and obtaining an electric toothbrush with a relatively small volume.

[0019] In one embodiment, one of the first bracket and the second bracket is provided with a notch portion, and the other is provided with a first limiting portion;

[0020] When the first bracket and the second bracket are fastened, the first limiting portion extends into the notch portion to guide and limit the installation of the first bracket and the second bracket.

[0021] With such a setting, when the first bracket and the second bracket are buckled and fixed, the first limiting portion is located within the notch portion, enabling guiding installation and preventing misalignment between the first bracket and the second bracket, ensuring accurate positioning when the first bracket and the second bracket are fixed, and facilitating improving the connection stability between the first bracket and the second bracket.

[0022] In one implementation, the internal bracket includes a top wall and a bottom wall, and the top wall and the bottom wall are jointly provided on one of the first bracket and the second bracket; the top wall abuts against the motor, and the bottom wall abuts against the battery.

[0023] With such a setting, the top wall abuts against the motor, and the bottom wall abuts against the battery. The top wall and the bottom wall are both provided on the first bracket or the second bracket. Thus, when the motor and the battery are installed, the motor and the battery can be jointly fixed on the same first bracket or second bracket, thereby playing a role in stabilizing the fixation of the motor and the battery. This also improves the integrity of the internal bracket, the motor, and the battery, facilitating the fixation of the internal structure of the electric toothbrush, reducing the vibration and noise of the electric toothbrush, and facilitating the assembly operation of the electric toothbrush.

[0024] In one implementation, the length of the second bracket in the axial direction is relatively smaller than the length of the first bracket in the axial direction, and when the first bracket and the second bracket are snap-fitted and fixed, the two ends of the second bracket in the axial direction respectively abut against the top wall and the bottom wall.

[0025] With such a setting, the first bracket can limit the second bracket through the top wall and the bottom wall, further facilitating improving the connection stability between the first bracket and the second bracket.

[0026] In one implementation, the bottom wall is provided with a stabilizing hole, and one end of the first bracket or the second bracket without the top wall and the bottom wall close to the bottom wall is provided with a stabilizing portion, and the stabilizing portion extends into the stabilizing hole and is snap-fitted to form the wall of the stabilizing hole.

[0027] With such a setting, the stabilizing portion and the stabilizing hole further strengthen the fixation between the first bracket and the second bracket, facilitating improving the integrity of the internal bracket after fixation.

[0028] In one implementation, the first bracket or the second bracket is provided with a first heat dissipation hole for dissipating heat from the motor;

[0029] The first bracket or the second bracket is provided with a second heat dissipation hole for dissipating heat from the motor and the battery.

[0030] With such a setting, the first heat dissipation hole can dissipate heat from the motor well, and the second heat dissipation hole can dissipate heat from the motor and the battery simultaneously, which will reduce the internal temperature of the electric toothbrush during operation, facilitating protecting the product and further facilitating improving the service life.

[0031] In one embodiment, the first bracket is provided with first heat dissipation holes; the second bracket is provided with second heat dissipation holes;

[0032] and the number of the second heat dissipation holes is multiple, and the multiple second heat dissipation holes are arranged at intervals along the axial direction of the second bracket to dissipate heat from the motor and the battery.

[0033] With such a setting, since the motor and the battery are fastened and fixed by the first bracket and the second bracket, the first heat dissipation holes can dissipate heat from the motor, and the multiple second heat dissipation holes can dissipate heat from the motor and the battery, further improving the service life of the motor and the battery and facilitating the long-term and safe use of the electric toothbrush.

[0034] In one embodiment, the shape of the first heat dissipation holes is strip-shaped; and / or, the shape of the second heat dissipation holes is oval-track-shaped.

[0035] With such a setting, the general shape of the first heat dissipation holes is strip-shaped. Since the motor continuously generates heat in the axial direction, the strip-shaped first heat dissipation holes can dissipate heat relatively evenly along the axial length of the motor, and can hardly affect the mechanical strength of the bracket in the circumferential direction, thus facilitating the long-term use of the motor and improving the service life of the electric toothbrush; the oval-track-shaped second heat dissipation holes are convenient for heat dissipation and enable the second bracket to have a good hollow structure, that is, the second bracket has good deformation ability and relatively uniform mechanical strength. The internal bracket formed after the first bracket and the second bracket are fastened has both strength and deformation ability, which is conducive to use.

[0036] In one embodiment, the motor fixing part and the battery fixing part on the first bracket are integrally formed; or, the motor fixing part and the battery fixing part on the second bracket are integrally formed.

[0037] With such a setting, the motor fixing part and the battery fixing part have good connection stability, which further facilitates enhancing the integrity of the internal bracket, reducing the vibration and noise of the electric toothbrush, and reducing the assembly steps.

[0038] In one embodiment, the first bracket or the second bracket is split.

[0039] With such a setting, the motor fixing part and the battery fixing part are directly fixed or indirectly fixed through other components, and the fixing method can be screw connection, snap connection, etc., so as to meet the design requirements under corresponding working conditions, as long as the integrity of the internal bracket can be enhanced.

[0040] In one embodiment, the first bracket and the second bracket are fastened to each other to form a complete motor fixing part and battery fixing part.

[0041] With such a setting, the integrity is further enhanced, which is conducive to reducing vibration and noise and further improving the comfort of use.

[0042] In one implementation, the first bracket is fixedly screwed to the motor; and / or, the second bracket is fixedly screwed to the motor.

[0043] With such an arrangement, the first bracket is fixedly screwed to the motor, and the second bracket is fixedly screwed to the motor. As a result, both the first bracket and the second bracket are fixed relative to the motor, which realizes that the first bracket and the second bracket are not directly connected but are relatively buckled. This optimizes the structural design, does not introduce other structures, and can achieve the purpose of improving stability and integrity.

[0044] In one implementation, at least two clamping portions are provided on the motor fixing portion, and the clamping portions are used for fixing the first bracket and the second bracket; the distance between the upper end of the motor fixing portion and the adjacent clamping portion is less than the distance between two adjacent clamping portions;

[0045] and / or, at least two clamping portions are provided on the battery fixing portion, and the clamping portions are used for fixing the first bracket and the second bracket; the distance between the upper end of the battery fixing portion and the adjacent clamping portion is less than the distance between two adjacent clamping portions.

[0046] With such an arrangement, the clamping portions are arranged closer to the upper ends of the battery fixing portion and the motor fixing portion. This is because after the motor, the battery, and the internal bracket are assembled, more vibrations are in the upper half of the electric toothbrush handle, and more stable connection and fixation are required to achieve better mechanical strength. In addition, setting the clamping portions more towards the upper part can compensate for the reduction in the mechanical strength of the internal bracket and enhance the structural stability.

[0047] In one implementation, a clamping portion is provided on the first bracket, and the length of the clamping portion accounts for at least 5% of the length of the first bracket or the second bracket.

[0048] With such an arrangement, the clamping portion can meet the connection requirements of relevant length brackets, making the overall connection firm, which is beneficial to enhancing the service life of the product. In one implementation, there is no shock-absorbing portion on the inner side of the part of the first bracket corresponding to the battery fixation, and a shock-absorbing portion is provided on the inner side of the part of the second bracket corresponding to the battery fixation.

[0049] With such an arrangement, there is no shock-absorbing portion on the inner side of the first bracket, and a shock-absorbing portion is provided on the inner side of the second bracket. That is, in the axial length direction of the second bracket, the shock-absorbing portion basically extends along the overall length of the second bracket, thereby covering the motor fixing portion and the battery fixing portion on the second bracket. The shock-absorbing portion at the second bracket contacts the battery, playing a certain buffering role, which is beneficial to protecting the battery. Thus, whether during the installation process or when dropping during use, the shock-absorbing portion can provide good protection for the battery, which is beneficial to extending the service life.

[0050] In one implementation, there is a foam between the inner wall of the second bracket and the battery.

[0051] With such a setting, the foam between the second bracket and the battery can better protect the battery, and also helps to achieve further shock absorption and noise reduction, and to a certain extent, reduce the interference of vibration on the battery.

[0052] In one implementation, a clamping portion is provided inside the transition between the motor fixing portion and the battery fixing portion, and the clamping portion is used to hold the motor.

[0053] With such a setting, a clamping portion is provided inside the transition between the motor fixing portion and the battery fixing portion, and the clamping portion holds the motor, thereby realizing the position fixing of the motor relative to the motor fixing portion.

[0054] The present utility model further provides an electric toothbrush, which includes a handle housing and also includes the internal bracket of any one of the above; the internal bracket is arranged inside the handle housing.

[0055] The electric toothbrush provided by this application has a more compact structure. Since the structure is relatively not loose, the resonance generated by vibration on each component is relatively small, which is conducive to reducing vibration and noise as a whole; and it can better achieve the functions of shock absorption and noise reduction.

[0056] In one implementation, the electric toothbrush further includes a circuit board, the circuit board is arranged on the first bracket, the first bracket is provided with a wire arranging hole, and the cable of the motor extends out of the wire arranging hole to extend out of the internal bracket and be electrically connected to the circuit board.

[0057] With such a setting, the cable of the motor can extend out of the wire arranging hole and then be connected to the circuit board, further realizing the electric control of the motor by the electric toothbrush; the wire arranging hole facilitates the circuit connection of the motor, is conducive to optimizing the internal structure design of the electric toothbrush, and further conducive to obtaining an electric toothbrush with a relatively small volume.

[0058] In one implementation, an electrical connection portion is provided on the side of the circuit board facing away from the first bracket, and the circuit board is also provided with a wire passing hole;

[0059] The cable of the motor extending out of the wire passing hole passes through the wire passing hole and extends to the side of the circuit board facing away from the first bracket and is connected to the electrical connection portion.

[0060] With such a setting, the circuit board is provided with a wire passing hole, and the wire passing hole is arranged adjacent to the wire arranging hole. Thus, the cable of the motor can extend out of the wire arranging hole of the first bracket, pass through the wire passing hole of the circuit board and extend to the side of the circuit board where components are arranged, and be electrically connected to the electrical connection portion on the circuit board, thereby reducing the structural complexity of the motor wire arrangement, being conducive to obtaining a compact electric toothbrush, and further conducive to enhancing the competitiveness of the product.

[0061] In one implementation, a clamping portion is further provided on the outer wall of the first bracket, and the clamping portion is used to fix the circuit board.

[0062] With such a setting, the clamping part is used to fix the circuit board, thus enriching the functions of the internal bracket, optimizing the design, and facilitating the reduction of the volume of the electric toothbrush.

[0063] In one of the embodiments, the battery fixing part is provided with a plurality of auxiliary holes, and the positions of the auxiliary holes correspond to the positions of the clamping part one by one.

[0064] With such a setting, the auxiliary holes and the clamping part are basically at the same horizontal position. The auxiliary holes allow components to extend in during assembly, thus facilitating the disassembly and assembly operations of the circuit board. In one of the embodiments, the first bracket is further provided with a second limiting part. The number of the second limiting parts is at least two, and at least part of the second limiting parts are spaced apart in the circumferential direction of the first bracket. The circuit board is correspondingly located between the second limiting parts in the circumferential direction.

[0065] With such a setting, at least part of the second limiting parts are spaced apart in the circumferential direction of the first bracket. Thus, when installing the circuit board, it is only necessary to place the circuit board between the second limiting parts in the circumferential direction. The circuit board is correspondingly pressed in this area, and the clamping part will automatically clamp the circuit board. The second limiting part not only plays a role in guiding the installation, but also can cooperate with the clamping part to facilitate the installation operation, which is beneficial to improving the assembly efficiency and protecting the circuit board.

[0066] In one of the embodiments, the length of the second limiting part in the axial direction of the first bracket is greater than the length of the clamping part.

[0067] With such a setting, the length of the second limiting part in the axial direction of the first bracket is greater than that of the clamping part. Thus, the relatively long second limiting part can limit the deflection of the circuit board. The second limiting part will provide continuous limitation in the length direction of the circuit board, which is beneficial to the precise installation of the circuit board; while the relatively short clamping part is beneficial to better deformation, and then the circuit board can be more easily clamped by the clamping part, which is further beneficial to the protection of the circuit board.

[0068] In one of the embodiments, the cross-sectional shape of the handle housing is triangular, and the internal bracket abuts against the inner side of the handle housing.

[0069] With such a configuration, the cross-sectional shape of the handle shell is roughly triangular, which gives the electric toothbrush a more novel visual effect and enhances the market competitiveness of the product. The roughly triangular edges are convenient for applying force to the handle shell, which is beneficial for users to hold and is not easy to slip. Therefore, when users adjust the posture of the electric toothbrush, they can operate more conveniently, which is beneficial for users to use. In addition, it is more convenient to set buttons or displays on the edges of the triangle without too much consideration of the curvature and curved surface, thereby reducing the processing difficulty and cost. Especially when the cross-sectional shape of the handle shell is quasi-triangular, since the handle shell resists the inner shell bracket, the second bracket has better deformation ability, which can make the second bracket better subjected to the resisting force of the handle shell, and the second bracket is more firmly buckled with the first bracket, which is further beneficial to improving the overall stability of the internal bracket, the motor and the battery, and is beneficial to reducing the vibration and noise of the electric toothbrush.

[0070] In one embodiment, a tail cover assembly is further included, the bottom wall of the internal bracket is provided with a threaded portion, and a threaded fastener screws the tail cover assembly to the threaded portion.

[0071] In this arrangement, a threaded portion is provided on the side of the bottom wall facing away from the battery, and a threaded fastener screws the tail cover assembly to the threaded portion, thereby achieving relative fixation of the tail cover assembly relative to the internal bracket, which further helps to optimize the design of the electric toothbrush and reduce the size of the electric toothbrush.

[0072] In one embodiment, two opposite walls of the first bracket are provided with a reinforcement portion, and the reinforcement portion extends along the axial direction of the first bracket; a protrusion is provided on the reinforcement portion, and the protrusion abuts against the inner side of the handle shell.

[0073] With such a configuration, a protrusion is provided on the reinforcement portion, and the protrusion abuts against the inner side of the handle shell, so that the handle shell can easily apply force to the internal bracket, which is further beneficial to the shock absorption and noise reduction of the electric toothbrush and improves the user's comfort.

[0074] In one embodiment, the protrusion rigidly abuts the handle housing.

[0075] With such a configuration, the protrusion is made of a hard material, that is, the protrusion rigidly presses against the inner shell of the handle and basically does not deform, so that the integrity of the internal bracket and the outer shell of the handle is better, which is conducive to shock absorption and noise reduction.

[0076] In one embodiment, the protrusion elastically abuts against the handle housing.

[0077] With such a configuration, the protrusion is made of a soft material, that is, the protrusion elastically presses against the inner shell of the handle, which can meet the shock absorption and noise reduction requirements of corresponding working conditions.

[0078] In one of the embodiments, a bracket fixing portion is provided at one end of the first bracket close to the battery, and the bracket fixing portion is stepped; a fixing groove is provided at one end of the inner side of the handle housing close to the battery; the protruding portion of the bracket fixing portion extends into the fixing groove.

[0079] With such a setting, after the inner bracket is installed with the motor, battery and circuit board, as a whole, the inner bracket can be directly pushed into the handle housing, so that the bracket fixing portion is snapped into the fixing groove, realizing the fixation of the whole inner bracket and its internal components to the handle housing, which is more convenient for the assembly operation.

[0080] In addition to the technical problems solved by the embodiments of the present invention described above, the technical features constituting the technical solutions, and the beneficial effects brought by these technical features of the technical solutions, other technical problems that can be solved by an inner bracket for an electric toothbrush and an electric toothbrush provided by the embodiments of the present invention, other technical features included in the technical solutions, and the beneficial effects brought by these technical features will be further described in detail in the specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0081] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0082] Figure 1 It is a schematic structural diagram of an electric toothbrush in one embodiment of the present application;

[0083] Figure 2 It is a schematic structural diagram of an inner bracket in one embodiment of the present application;

[0084] Figure 3 It is Figure 1 a schematic structural diagram of the first bracket, the motor and the battery in

[0085] Figure 4 It is Figure 2 a schematic structural diagram of another perspective of the inner bracket shown;

[0086] Figure 5 It is Figure 2 a schematic structural diagram of the first bracket in the inner bracket shown;

[0087] Figure 6 It is Figure 5 a schematic structural diagram of another perspective of the first bracket shown;

[0088] Figure 7 It is Figure 6 a schematic disassembled structural diagram of the first bracket shown;

[0089] Figure 8 It is Figure 2Schematic diagram of the second bracket structure of the internal bracket shown;

[0090] Figure 9 is Figure 8 Schematic diagram of the structure of the second bracket from another perspective shown;

[0091] Figure 10 is Figure 9 Schematic diagram of the structure of the second bracket from other perspectives shown;

[0092] Figure 11 is Figure 2 Partial schematic diagram of the internal bracket shown;

[0093] Figure 12 Schematic diagram of the structure of the internal bracket and the circuit board in an embodiment of the present application.

[0094] Explanation of reference numerals:

[0095] 100, internal bracket; 110, motor fixing part; 120, battery fixing part; 130, first bracket; 1301, clamping part; 1302, second limiting part; 1303, abutting part; 1304, clamping part; 1305, auxiliary hole; 131, clamping connection part; 132, notch part; 133, top wall; 134, bottom wall; 1341, threaded part; 135, stabilizing hole; 136, first heat dissipation hole; 137, wire arranging hole; 138, strengthening part; 1381, protrusion; 139, bracket fixing part; 140, second bracket; 141, clamping block; 142, first limiting part; 143, stabilizing part; 144, second heat dissipation hole; 150, damping part; 151, damping protrusion;

[0096] 200, electric toothbrush; 210, handle housing; 220, motor; 230, battery; 240, circuit board; 241, electrical connection part; 242, wire passing hole.

[0097] Through the above-mentioned drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Specific embodiments

[0098] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0099] Refer to Figures 1 - 10 . As a tool for cleaning the oral cavity, the electric toothbrush 200 drives the toothbrush head to vibrate at a high frequency through the motor 220, which can promote blood circulation in the oral cavity to improve the cleaning effect on the oral cavity and also has a certain massaging effect on the gingival tissue. Moreover, the high-frequency vibration of the toothbrush head can also decompose the cleaning toothpaste into fine bubbles. The fine bubbles can deeply clean the tooth gaps and can more effectively improve the cleaning effect on the oral cavity.

[0100] Refer to Figure 1 and Figure 3 , the electric toothbrush 200 includes a handle housing 210, an internal bracket 100, a motor 220, a battery 230, a circuit board 240, etc.; the internal bracket 100 is disposed inside the handle housing 210, and the motor 220, the battery 230, and the circuit board 240 are all disposed on the internal bracket 100. The handle housing 210 is for the user to hold, facilitating the user to perform the brushing operation; the internal bracket 100 is for fixing the internal structure; the motor 220 is for providing the output power of the electric toothbrush 200; the battery 230 is for providing a power source; the circuit board 240 is for circuit connection of the motor 220, the battery 230, etc. and related circuit control.

[0101] The handle housing 210 can be a plastic handle housing 210 or a metal handle housing 210. The shape of the handle housing 210 can be a generally slender columnar shape, and the cross-sectional shape of the handle housing 210 can be a generally circular shape, a generally rectangular shape, a generally triangular shape, etc.; the generally circular shape can be an oval or a track-shaped circle, etc.; the generally rectangular shape can be a rectangle with arc-shaped sides and smooth transitions between the sides; the generally triangular shape can be a triangle with arc-shaped sides and smooth transitions between the sides. Among them, it should be noted that the cross-section of the handle housing 210 can be regarded as the shape formed by the horizontal plane cutting the wall of the handle housing 210 when the toothbrush head of the electric toothbrush 200 is placed vertically upward.

[0102] In one embodiment, the cross-sectional shape of the handle housing 210 is generally triangular, which gives the electric toothbrush 200 a relatively novel visual effect, enhances the market competitiveness of the product, and the edges of the general triangle are convenient for applying force to the handle housing 210, facilitating user grip and not easily slipping. Furthermore, when the user adjusts the posture of the electric toothbrush 200, it can be operated more conveniently, which is beneficial to user use. Additionally, it is more convenient to set buttons or displays on the edge surface of the triangle without too much consideration of the problems of arc and curved surface, reducing the processing difficulty and cost. In another embodiment, the cross-sectional shape of the handle housing 210 is generally rectangular, so that the internal structure of the electric toothbrush 200 can be more conveniently arranged inside the handle housing 210. Compared with the standard circular cross-section, the processing precision requirements for the internal structure are reduced, and the processing error tolerance of the internal and external housings is higher, which is beneficial to the assembly and production of the electric toothbrush 200. In another embodiment, the cross-sectional shape of the handle housing 210 is generally circular, which can make the shape of the housing more matched with the shape of the conventional motor 220, make the internal space of the housing more fully and reasonably utilized, and reduce the size of the whole machine. According to different working conditions, the handle housing 210 can adopt different cross-sections as long as the corresponding working condition requirements can be met.

[0103] See Figure 2 and Figure 3 , the internal bracket 100 fixes the motor 220 and the battery 230. Since the motor 220 and the battery 230 are relatively large and main parts inside the electric toothbrush 200, the internal bracket 100 fixing the motor 220 and the battery 230 at the same time can strengthen the integrity of the internal structure of the electric toothbrush 200, making the coordination of structures such as the motor 220 and the battery 230 stronger when the electric toothbrush 200 is working, thereby reducing the vibration and noise generated by the internal structure when the electric toothbrush 200 is working, which is beneficial to improving the comfort of user use.

[0104] In this embodiment, both the motor 220 and the battery 230 are directly connected to or in direct contact with the internal bracket 100, which can greatly reduce the complexity of the internal structure, facilitate the optimization of the internal design of the electric toothbrush 200, thereby reducing the volume of the electric toothbrush 200, and further facilitating the obtaining of a miniaturized electric toothbrush 200; it can be understood that in other embodiments, the motor 220 and the battery 230 can also be connected to the internal bracket 100 through other components, that is, it can be an indirect connection method, as long as the integrity of the electric toothbrush 200 can be enhanced as described above.

[0105] The internal bracket 100 includes a motor fixing part 110 and a battery fixing part 120. The motor fixing part 110 is connected to the battery fixing part 120. The motor fixing part 110 is used to fix the motor 220, and the battery fixing part 120 is used to fix the battery 230. In this embodiment, at least part of the motor fixing part 110 and at least part of the battery fixing part 120 are integrally formed, which makes the connection stability between the motor fixing part 110 and the battery fixing part 120 better, further facilitating the enhancement of the integrity of the internal bracket 100, reducing the vibration and noise of the electric toothbrush 200, and reducing the assembly steps. It can be understood that in other embodiments, the motor fixing part 110 and the battery fixing part 120 can also be a split structure, that is, the motor fixing part 110 and the battery fixing part 120 are directly fixed or indirectly fixed through other components. The fixing method can be screw connection, snap connection, etc., so as to meet the design requirements under corresponding working conditions, as long as the integrity of the internal bracket 100 can be enhanced.

[0106] See Figures 4 - 10 , the internal bracket 100 includes a first bracket 130 and a second bracket 140. The first bracket 130 and the second bracket 140 are relatively buckled to form the internal bracket 100. After buckling, the motor 220 and the battery 230 are covered. It should be noted that the relative buckling means that the first bracket 130 and the second bracket 140 can be buckled by adopting a direct connection scheme, or can be buckled by using other structures as intermediate connectors for relative connection. In other embodiments, the first bracket 130 and the second bracket 140 are connected by other means, such as gluing, screw fixing, winding binding, etc. The specific connection method depends on the structure and assembly requirements.

[0107] In other embodiments, a seal can be provided at the connection between the first bracket 130 and the second bracket 140. The seal can be extruded and deformed to achieve the effects of sealing, waterproofing, shock absorption and noise reduction. Specifically, the seal can be a rubber part or a plastic part, and at least part of it protrudes from one side of the inner wall or outer wall of the bracket after the first bracket 130 and the second bracket 140 are assembled. The seal can also be glue, and part of it can overflow from the connection after assembly and drying. The seal can be a cylindrical or approximately cylindrical or approximately square sealing ring, and the corresponding connection side wall has a groove, and the circular sealing ring is located in the groove.

[0108] See Figure 6 、 Figure 7, the first bracket 130 includes a part of the motor fixing portion 110 and a part of the battery fixing portion 120 in the axial length of the electric toothbrush 200. The second bracket 140 includes at least one of the other part of the motor fixing portion 110 and the other part of the battery fixing portion 120 in the axial length of the electric toothbrush 200. Thus, the first bracket 130 and the second bracket 140 are snapped together to form the internal bracket 100. In other embodiments, one of the first bracket 130 or the second bracket 140 can be split-type, that is, the motor fixing portion 110 and the battery fixing portion 120 are not integrally formed. Instead, the motor 220 or the battery fixing portion 120 needs to be fixed to the integral bracket first and then the remaining part is installed. The fixing connection order can be changed as long as the installation is convenient. In this embodiment, as long as it is ensured that one of the first bracket 130 and the second bracket 140 is integral, the connection stability of the overall internal bracket 100 can also be satisfied. However, if the other bracket is split-type, it can provide a larger operating space for the internal structure and wire routing, facilitating the adjustment of the internal mechanism position and the neatness of the wire routing, etc. Motor fixing portion 110 Battery fixing portion 120

[0109] The first bracket 130 and the second bracket 140 are snapped together with the motor 220 and the battery 230, so that the first bracket 130, the second bracket 140, the motor 220 and the battery 230 have good integrity, which is beneficial to the shock absorption and noise reduction of the electric toothbrush 200; and with such a structure, when assembling the electric toothbrush 200, the internal structures such as the motor 220 and the battery 230 can be assembled first, and then the structure with better integrity can be inserted into the handle housing 210 together, which is convenient for the assembly of each component and the overall assembly of the electric toothbrush 200, beneficial to improving the production efficiency. At the same time, such a snap-fit structure also avoids the reduction of the yield rate caused by misoperation during assembly, and further helps to improve the yield rate.

[0110] In this embodiment, the first bracket 130 and the second bracket 140 are fixed by snap connection, which facilitates the buckling and fixing of the motor 220 and the battery 230 by the first bracket 130 and the second bracket 140, and facilitates the rapid assembly of the electric toothbrush 200. In particular, since the motor 220 is generally cylindrical, to ensure the support of the motor 220, the internal bracket 100 is generally similar to a cylinder or a cube. To minimize the size of the toothbrush and the space utilization rate of the internal stacking, when the cross-section of the columnar handle housing 210 is a quasi-triangle, due to the shape of the quasi-triangle, the walls of the handle housing 210 extending in the axial direction will abut against the first bracket 130 and the second bracket 140. Furthermore, the three walls corresponding to the quasi-triangle jointly abut against the overall internal bracket 100 and the motor 220 and the battery 230 fixed by the internal bracket 100 from three directions, further improving the overall stability and integrity of the electric toothbrush 200, which is conducive to reducing the vibration and noise of the electric toothbrush 200. This not only facilitates the assembly of the inner shell bracket but also ensures good strength after assembly. The synergistic effect of the two forms a better design. It can be understood that in other embodiments, the first bracket 130 and the second bracket 140 can also be fixed by screwing, for example, connected by threaded fasteners such as bolts and screws, so as to ensure good connection strength and stability, and the cross-section of the handle housing 210 is a quasi-rectangular shape.

[0111] In other embodiments, the first bracket 130 is screwed and fixed to the motor 220, and the second bracket 140 is screwed and fixed to the motor 220. Thus, both the first bracket 130 and the second bracket 140 are fixed relative to the motor 220. This realizes that the first bracket 130 and the second bracket 140 have no direct connection but are relatively buckled, and can also achieve the above-mentioned purpose of improving stability and integrity. Of course, according to different working conditions, the fixing methods of the first bracket 130 and the second bracket 140 can be selected, and the shape of the handle housing 210 can also be selected accordingly, as long as the corresponding working condition purposes can be achieved.

[0112] A snap connection portion 131 is provided on the first bracket 130. The snap connection portion 131 is formed by the wall of the first bracket 130 extending towards the second bracket 140. A snap connection hole is provided on the snap connection portion 131, and the second bracket 140 is provided with a snap connection block 141. Thus, during installation, only by buckling and pressing the first bracket 130 and the second bracket 140, the snap connection portion 131 will snap onto the snap connection block 141, and the snap connection block 141 extends into the snap connection hole, thereby realizing the fixation of the first bracket 130 and the second bracket 140. In other embodiments, the snap connection portion 131 can also be an L-shaped card slot with protrusions, and corresponding protrusion card slots are also provided on the snap connection block 141, which can hook back the snap connection portion 131 to achieve a stable snap connection effect.

[0113] See Figure 4, the number of the clamping parts 131 and the clamping blocks 141 are both multiple, and the two correspond to each other and are clamped one by one. In this embodiment, the number of the clamping parts 131 and the clamping blocks 141 is eight, and four clamping parts 131 are arranged on each of the two corresponding walls along the axial length of the first bracket 130, and four clamping blocks 141 are arranged on each of the two corresponding walls along the axial length of the second bracket 140, so that four clamping parts 131 are clamped on both sides of the first bracket 130 and the second bracket 140, respectively, to achieve a stable fixation; it can be understood that in other embodiments, the number of the clamping parts 131 and the clamping blocks 141 can also be other values. The four clamping parts 131 have two each located at the battery fixing part 120 and the motor fixing part 110, and are not evenly spaced along the axial length, but are arranged closer to the upper end of the battery fixing part 120 and the upper end of the motor fixing part 110. This is because after the motor 220, the battery 230 and the internal bracket 100 are assembled, more vibrations are in the upper half of the handle of the electric toothbrush 200, which requires a more stable connection and fixation and better mechanical strength. In addition, the upper half of the internal bracket 100 is provided with more heat dissipation holes. Please refer to the description of the heat dissipation holes below, which results in lower mechanical strength of the bracket in the upper part. It is necessary to set the clamping part 131 more upward to compensate for the reduction in mechanical strength caused by the hollowing out of the bracket wall. It can be understood that in other embodiments, the number of clamping parts 131 and clamping blocks 141 can also be other values.

[0114] In the area corresponding to the motor fixing portion 110, each wall of the first bracket 130 is correspondingly provided with two clamping portions 131, and each wall of the second bracket 140 is correspondingly provided with two clamping blocks 141, so that in the area of ​​the motor fixing portion 110, the two clamping portions 131 on each side of the wall correspond to the two clamping blocks 141 for clamping, and a total of four clamping portions 131 are clamped to the clamping blocks 141; similarly, in the area corresponding to the battery fixing portion 120, each wall of the first bracket 130 is correspondingly provided with two clamping portions 131, and each wall of the second bracket 140 is correspondingly provided with two clamping blocks 141, so that in the area of ​​the battery fixing portion 120, the two clamping portions 131 on each side of the wall correspond to the two clamping blocks 141. The connecting portion 131 is connected to two clamping blocks 141, and a total of four clamping portions 131 are connected to the clamping blocks 141, so that the snap-fitting force between the first bracket 130 and the second bracket 140 along the axial direction is basically evenly distributed. To ensure the reliability of the connection, the length of the clamping portion 131 is at least 5% of the wall length, that is, the snap-fitting force between the first bracket 130 and the second bracket 140 on the motor 220 and the battery 230 is basically even, which prevents the internal structure from stress concentration, further helps to improve reliability, and also enables the internal bracket 100 to better fix the motor 220 and the motor 220 at all locations in the axial direction.

[0115] In this embodiment, when the brush head of the electric toothbrush 200 is placed upright normally, in the horizontal direction of the first bracket 130, the clamping portions 131 of the two walls are basically horizontally aligned; similarly, in the horizontal direction of the second bracket 140, the clamping blocks 141 of the two walls are basically horizontally aligned. Further, the fixing forces received on both sides of the inner bracket 100 are basically the same, which is also beneficial to preventing stress concentration and further beneficial to improving reliability. It can be understood that in other embodiments, according to different working conditions, the clamping portion 131 and the clamping block 141 may also be arranged in other ways.

[0116] The first bracket 130 is further provided with a notch portion 132, and the second bracket 140 is provided with a first limiting portion 142. When the first bracket 130 and the second bracket 140 are fastened and fixed, the first limiting portion 142 is located within the notch portion 132, so as to be able to guide the installation and prevent the dislocation of the first bracket 130 and the second bracket 140, ensuring accurate positioning when the first bracket 130 and the second bracket 140 are fixed, which is beneficial to improving the connection stability between the first bracket 130 and the second bracket 140. Moreover, the first limiting portion 142 and the notch portion 132 can also play a role in facilitating installation, that is, by correspondingly installing the first limiting portion 142 and the notch portion 132, the clamping and fixing of the first bracket 130 and the second bracket 140 can be realized, with dual effects for a single component, optimizing the structural design of the electric toothbrush 200.

[0117] In this embodiment, the general shape of the first limiting portion 142 is a prism shape, and the general shape of the notch portion 132 is also a prism shape. Thus, when the first limiting portion 142 extends into the notch portion 132, the edges and corners of the prism shape can play a good limiting role, and the first bracket 130 and the second bracket 140 are basically not misaligned during installation. It can be understood that in other embodiments, according to different working conditions, the first limiting portion 142 and the notch portion 132 may also be of other shapes.

[0118] The inner bracket 100 further includes a top wall 133 and a bottom wall 134. The top wall 133 is used to abut against the motor 220, and the bottom wall 134 is used to abut against the battery 230. The top wall 133 and the bottom wall 134 are both arranged on the first bracket 130 or the second bracket 140. Thus, when the motor 220 and the battery 230 are installed, the motor 220 and the battery 230 can be jointly fixed on the same first bracket 130 or second bracket 140, thereby playing a role in stabilizing the fixing of the motor 220 and the battery 230. This also improves the integrity of the inner bracket 100, the motor 220 and the battery 230, is beneficial to the fixing of the internal structure of the electric toothbrush 200, is also beneficial to reducing the vibration and noise of the electric toothbrush 200, and facilitates the assembly operation of the electric toothbrush 200.

[0119] In this embodiment, both the top wall 133 and the bottom wall 134 are provided on the first bracket 130, and the bottom wall 134 is provided with a stabilizing hole 135. One end of the second bracket 140 close to the bottom wall 134 is provided with a stabilizing portion 143. The stabilizing portion 143 extends into the stabilizing hole 135 and is snap-fitted to form the wall of the stabilizing hole 135, so that the stabilizing portion 143 and the stabilizing hole 135 further strengthen the fixation between the first bracket 130 and the second bracket 140. It can be understood that in other embodiments, according to different working conditions, the positions of the stabilizing hole 135 and the stabilizing portion 143 can also be interchanged.

[0120] See Figure 11 , the electric toothbrush further includes a tail cap assembly for realizing the charging function of the electric toothbrush 200. The tail cap assembly is screwed and fixed to the side of the bottom wall 134 facing away from the battery 230. Specifically, the side of the bottom wall 134 facing away from the battery 230 is provided with a threaded portion 1341, and a threaded fastener screws and fixes the tail cap assembly to the threaded portion 1341, thereby realizing the relative fixation of the tail cap assembly relative to the inner bracket 100, which further helps to optimize the design of the electric toothbrush 200 and reduce the volume of the electric toothbrush 200.

[0121] The length of the second bracket 140 in the axial direction is relatively smaller than the length of the first bracket 130 in the axial direction. When the first bracket 130 and the second bracket 140 are snap-fitted and fixed, both ends of the second bracket 140 in the axial direction abut against the top wall 133 and the bottom wall 134 respectively. This enables the first bracket 130 to limit the second bracket 140 through the top wall 133 and the bottom wall 134, which further helps to stably connect the first bracket 130 and the second bracket 140.

[0122] A first heat dissipation hole 136 is formed in the first bracket 130 or the second bracket 140. The first heat dissipation hole 136 is used to dissipate heat from the motor 220. In this embodiment, the first heat dissipation hole 136 corresponds to the area of the motor fixing portion 110, so as to facilitate heat dissipation from the motor 220. The general shape of the first heat dissipation hole 136 is strip-shaped. Since the motor 220 continuously generates heat in the axial direction, the strip-shaped first heat dissipation hole 136 can dissipate heat relatively evenly along the axial length of the motor 220 and does not affect the mechanical strength of the bracket in the circumferential direction as much as possible, thereby facilitating the long-term use of the motor 220 and improving the service life of the electric toothbrush 200. It can be understood that in other embodiments, according to different working conditions, the shape of the first heat dissipation hole 136 can also be a porous shape, which can achieve the effect of reducing the vibration noise of the motor 220 while realizing relatively uniform heat dissipation over a large area.

[0123] The first bracket 130 or the second bracket 140 is provided with second heat dissipation holes 144 for overall heat dissipation of the internal bracket 100 structure. The number of the second heat dissipation holes 144 is multiple, and the multiple second heat dissipation holes 144 are spaced along the axial length of the first or second bracket 140. Since the motor 220 and the battery 230 are fastened and fixed by the first bracket 130 and the second bracket 140, the multiple second heat dissipation holes 144 can dissipate heat from the motor 220 and the battery 230, further improving the service life of the motor 220 and the battery 230 and facilitating the long-term and safe use of the electric toothbrush 200.

[0124] In this embodiment, the first bracket 130 is provided with first heat dissipation holes 136, and the second bracket 140 is provided with second heat dissipation holes 144. The multiple second heat dissipation holes 144 are spaced along the length direction of the second bracket 140, making the second bracket 140 substantially hollowed out. This increases the ability of the second bracket 140 to tolerate deformation. Thus, when the second bracket 140 fastens the first bracket 130 to fix the motor 220 and the battery 230, the better deformation ability facilitates the installation operation. Especially when the cross-section of the handle housing 210 is triangular, since the handle housing 210 abuts against the inner shell bracket, the better deformation ability of the second bracket 140 enables the second bracket 140 to better receive the abutting force of the handle housing 210, and the second bracket 140 more firmly fastens the first bracket 130, further facilitating the improvement of the overall stability of the internal bracket 100, the motor 220 and the battery 230 and reducing the vibration and noise of the electric toothbrush 200. It can be understood that in other embodiments, the first heat dissipation holes 136 and the second heat dissipation holes 144 can also be arranged in other ways on the first bracket 130 or the second bracket 140.

[0125] In this embodiment, the second heat dissipation holes 144 are oval holes. The major diameter of the oval extends along the circumferential direction of the internal bracket 100. The oval second heat dissipation holes 144 are convenient for heat dissipation and endow the second bracket 140 with a better hollow structure, that is, the second bracket 140 has better deformation ability and relatively uniform mechanical strength. And in the area corresponding to the motor fixing part 110, there are five oval second heat dissipation holes 144, and in the area corresponding to the battery fixing part 120, there are also five oval second heat dissipation holes 144. It can be understood that in other embodiments, the second heat dissipation holes 144 can also be of other shapes or other quantities.

[0126] The electric toothbrush 200 further includes a circuit board 240, which is disposed on the first bracket 130. The first bracket 130 is provided with a cable hole 137, and the cable hole 137 is located at one end of the motor fixing portion 110 relatively closer to the battery fixing portion 120. Thus, the cable of the motor 220 can extend out of the cable hole 137 and then be connected to the circuit board 240, further realizing the electric control of the motor 220 by the electric toothbrush 200. The cable hole 137 facilitates the circuit connection of the motor 220, is conducive to optimizing the internal structural design of the electric toothbrush 200, and further facilitates obtaining an electric toothbrush 200 with a relatively small volume.

[0127] See Figure 12 , on the side of the circuit board 240 facing away from the first bracket 130, there are electrical components and an electrical connection portion 241 is provided. The circuit board 240 is provided with a wire passing hole 242, and the wire passing hole 242 is adjacent to the cable hole 137. Thus, the cable of the motor 220 can extend out of the cable hole 137 of the first bracket 130, pass through the wire passing hole 242 of the circuit board 240 and extend to the side of the circuit board 240 where the components are arranged, and be electrically connected to the electrical connection portion 241 on the circuit board 240. Further, the structural complexity of the cable arrangement of the motor 220 is reduced, which is conducive to obtaining a compact electric toothbrush 200 and further conducive to enhancing the competitiveness of the product. Of course, the adjacent arrangement here can be that the cable hole 137 completely covers the wire passing hole 242 in the circumferential direction, or the cable hole 137 partially overlaps with the wire passing hole 242, or the cable hole 137 and the wire passing hole 242 are spaced apart in the axial direction without overlap.

[0128] Two opposite walls of the first bracket 130 are provided with strengthening portions 138. The strengthening portions 138 extend along the axial direction of the first bracket 130 and are strip-shaped. Each strengthening portion 138 is provided with a protrusion 1381, and the protrusion 1381 abuts against the inner side of the handle housing 210. Thus, the handle housing 210 can facilitate applying force to the internal bracket 100, which is further conducive to the shock absorption and noise reduction of the electric toothbrush 200 and improves the user's comfort in use.

[0129] In this embodiment, the protrusion 1381 is made of a hard material, that is, the protrusion 1381 rigidly abuts against the inner shell of the handle and basically does not deform. Thus, the integrity of the internal bracket 100 and the handle housing 210 is better, which is conducive to shock absorption and noise reduction. It can be understood that in other embodiments, according to different working conditions, the protrusion 1381 can also be made of a soft material, that is, the protrusion 1381 elastically abuts against the inner shell of the handle, as long as it can meet the shock absorption and noise reduction requirements of the corresponding working conditions.

[0130] The outer wall of the first bracket 130 is further provided with a clamping portion 1301, which is used to fix the circuit board 240, thereby enriching the functions of the inner bracket 100, optimizing the design, and facilitating the reduction of the volume of the electric toothbrush 200. The number of the clamping portions 1301 is multiple, and they can be arranged in the areas corresponding to the motor fixing portion 110 and the battery fixing portion 120, or only in the area corresponding to the motor fixing portion 110 or the area corresponding to the battery fixing portion 120.

[0131] In this embodiment, the clamping portion 1301 is provided in the area corresponding to the battery fixing portion 120, and the number of the clamping portions 1301 in the area of the battery fixing portion 120 is four. The four clamping portions 1301 are basically rectangular, so that the circuit board 240 can receive better fixing and supporting forces in both the length and width directions, which is conducive to the stable setting of the circuit board 240 on the inner bracket 100; and a plurality of auxiliary holes 1305 are correspondingly opened in the area of the battery fixing portion 120. The positions of the auxiliary holes 1305 correspond to the positions of the clamping portions 1301 one by one, that is, the corresponding auxiliary holes 1305 and the clamping portions 1301 are basically in the same horizontal position. The auxiliary holes 1305 allow components to extend in during assembly, thus facilitating the disassembly and assembly operations of the circuit board 240; it can be understood that in other embodiments, the clamping portion 1301 can also be provided in the area of the motor fixing portion 110. Of course, the number of the clamping portions 1301 and the auxiliary holes 1305 can also be other values.

[0132] A second limiting portion 1302 is provided in the area of the motor fixing portion 110. The number of the second limiting portions 1302 is at least two, and at least part of the second limiting portions 1302 are spaced apart in the circumferential direction of the first bracket 130. Thus, when the circuit board 240 is installed, it only needs to be placed between the second limiting portions 1302 corresponding in the circumferential direction of the circuit board 240. The circuit board 240 is correspondingly pressed in this area, and the clamping portion 1301 will automatically clamp the circuit board 240. The second limiting portion 1302 not only plays a role in guiding the installation, but also can cooperate with the clamping portion 1301 to facilitate the installation operation, which is conducive to improving the assembly efficiency and protecting the circuit board 240.

[0133] The length of the second limiting portion 1302 in the axial direction of the first bracket 130 is greater than that of the clamping portion 1301. Thus, the relatively long second limiting portion 1302 can limit the deflection of the circuit board 240, and the second limiting portion 1302 will be continuously limited in the length direction of the circuit board 240, which is conducive to the precise installation of the circuit board 240; while the relatively short clamping portion 1301 is conducive to better deformation, so that the circuit board 240 can be more easily clamped by the clamping portion 1301, which further facilitates the protection of the circuit board 240.

[0134] In this embodiment, two abutting portions 1303 are respectively provided at both ends of the first bracket 130 in the axial direction. The two abutting portions 1303 limit both ends of the circuit board 240 in the axial direction, so as to cooperate with the second limiting portion 1302 to realize the positioning of the circuit board 240 in the axial and circumferential directions, which is further beneficial to the installation of the circuit board 240. It can be understood that in other embodiments, the circuit board 240 can also be restricted in the axial direction in other ways.

[0135] In this embodiment, the clamping portion 1301 clamps the circuit board 240, and the second limiting portion 1302 and the abutting portion 1303 only contact and limit the circuit board 240. It can be understood that in other embodiments, according to different working conditions, the second limiting portion 1302, the abutting portion 1303 and the circuit board 240 can also be connected in other ways.

[0136] One end of the first bracket 130 close to the battery fixing portion 120 is also provided with two bracket fixing portions 139, which are respectively arranged on opposite sides of the first bracket 130. Fixing grooves are provided inside the handle housing 210 near the tail of the battery 230. After the internal bracket 100 is installed with the motor 220, the battery 230 and the circuit board 240, as a whole, the internal bracket 100 can be directly pushed into the handle housing 210, so that the bracket fixing portion 139 is clamped into the fixing groove, realizing the fixation of the whole internal bracket 100 and its internal components to the handle housing 210.

[0137] In this embodiment, the bracket fixing portion 139 is generally in a stepped shape, that is, the protruding part of the bracket fixing portion 139 extends into the fixing groove, and the other part of the bracket fixing portion 139 abuts against the outer wall of the fixing groove, which is beneficial to the stable connection between the bracket fixing portion 139 and the handle housing 210. It can be understood that in other embodiments, the bracket fixing portion 139 can also be in other forms.

[0138] A shock-absorbing portion 150 is provided inside the internal bracket 100. The shock-absorbing portion 150 has better flexibility relative to the internal bracket 100. The shock-absorbing portion 150 abuts against the motor 220 and / or the battery 230, thereby reducing the vibration and noise generated by the motor 220 and / or the battery 230, which is beneficial to improving the comfort of the user. In this embodiment, the shock-absorbing portion 150 is integrally formed on the internal bracket 100, and the forming method can be processes such as injection molding or overmolding, so that the shock-absorbing portion 150 has good connection stability with the internal bracket 100, further strengthening the shock-absorbing effect. It can be understood that in other embodiments, according to different working conditions, the shock-absorbing portion 150 can also be fixed to the inside of the internal bracket 100 by other means such as gluing.

[0139] Specifically, in the part corresponding to the motor fixing part 110, shock-absorbing parts 150 are provided on the inner sides of the first bracket 130 and the second bracket 140. Thus, when the first bracket 130 and the second bracket 140 are buckled to fix the motor 220, the shock-absorbing parts 150 can basically cover the circumferential side of the motor 220, which is beneficial to achieving a better shock-absorbing effect on the motor 220. In the part corresponding to the battery fixing part 120, there is no shock-absorbing part 150 on the inner side of the first bracket 130, and a shock-absorbing part 150 is provided on the inner side of the second bracket 140. That is, in the axial length direction of the second bracket 140, the shock-absorbing part 150 basically extends along the overall length of the second bracket 140, so as to cover the motor fixing part 110 and the battery fixing part 120 on the second bracket 140. The shock-absorbing part 150 at the second bracket 140 contacts the battery 230, playing a certain buffering role, which is beneficial to protecting the battery 230. Thus, whether during the installation process or when the electric toothbrush 200 drops during use, the shock-absorbing part 150 can provide better protection for the battery 230, which is beneficial to extending the service life of the electric toothbrush 200.

[0140] In the part of the battery fixing part 120 of the second first bracket 130, a second heat dissipation hole 144 is also provided. The shock-absorbing part 150 is arranged on the inner side of the battery fixing part 120 of the second bracket 140, achieving the effects of shock absorption and heat dissipation at the same time. The shock-absorbing part 150 can withstand a high temperature of at least 100 °C without deformation. The corresponding part of the battery fixing part 120 of the second bracket 140 and the first bracket 130 is not provided with holes or only provided with holes with a smaller area, so that this part has the mechanical strength of integrity and wholeness to protect the battery 230 from being pierced by sharp objects and causing safety accidents. To improve the shock-absorbing effect of the battery fixing part 120 of the second bracket 140 and the first bracket 130, a foam can be arranged between the battery 230 and the inner wall of the first and second brackets 140 to achieve shock absorption and noise reduction.

[0141] The shock-absorbing part 150 is also provided with protrusions 1381, shock-absorbing protrusions 151. The shock-absorbing protrusions 1381 protrude more relative to other areas of the shock-absorbing part 150. Furthermore, the shock-absorbing protrusions 1381 are more likely to contact the motor 220 or the battery 230. Due to the setting of the shock-absorbing protrusions 1381, the contact area between the motor 220 or the battery 230 and the shock-absorbing part 150 is smaller. Thus, when the motor 220 vibrates, less vibration is conducted from the motor 220 to the inner bracket 100 and the toothbrush handle, and more vibration noise is suppressed in the suspended area without the shock-absorbing protrusions 1381. The protrusions 1381 achieve better shock absorption and noise reduction, and the vibration conducted by the motor 220 felt by the user is smaller, providing a better experience. To better protect the battery 230, a buffer pad can also be arranged between the battery 230 and the second bracket 140. The buffer pad and the shock-absorbing protrusions 1381 jointly protect the battery 230, further improving the reliability of the electric toothbrush 200.

[0142] In the second bracket 140, the motor fixing part 110 and the battery fixing part 120 have a stepped transition. When the second bracket 140 is fastened and fixed to the first bracket 130, the width of the motor fixing part 110 formed jointly by the second bracket 140 and the first bracket 130 in the fastening direction is smaller than the width of the battery fixing part 120 formed jointly by the second bracket 140 and the first bracket 130 in the fastening direction. This enables both the relatively smaller motor 220 and the relatively larger battery 230 to be fixed relatively tightly by the first bracket 130 and the second bracket 140, further enhancing the integrity of the internal bracket 100, the motor 220, and the battery 230. When the motor 220 generates vibrations, due to better integrity, it is not easily transmitted to the handle housing 210, which is also conducive to reducing noise and improving the use comfort.

[0143] An abutting part 1304 is provided inside the transition part between the motor fixing part 110 and the battery fixing part 120. The abutting part 1304 abuts against the motor 220, thereby realizing the position fixation of the motor 220 relative to the motor fixing part 110. In this embodiment, the number of the abutting parts 1304 is multiple, specifically four. The four abutting parts 1304 are arranged at intervals along the circumferential direction of the internal bracket 100, so as to better abut against the motor 220, which is conducive to enhancing the integrity of the motor 220 and the internal bracket 100. It can be understood that in other embodiments, the number of the abutting parts 1304 can also be other values, as long as the purpose of stabilizing the motor 220 can be achieved.

[0144] In the above embodiments, neither the first bracket 130 nor the second bracket 140 has a priority order or a position order, and the statuses of the two brackets are the same.

[0145] The present utility model can also provide the above-mentioned internal bracket. The internal bracket includes a first bracket and a second bracket. The first bracket and the second bracket are fastened to each other and cover the motor and the battery. Damping parts are provided on the inner sides of the first bracket and the second bracket close to the motor and the battery. The damping parts are integrally formed on the first bracket and the second bracket, and the damping parts contact and buffer at least one of the motor or the battery. For the internal bracket for an electric toothbrush provided in the present application, the first bracket and the second bracket are fastened to each other and cover the motor and the battery, so that the first bracket, the second bracket, the motor, and the battery have better integrity and the structure is more compact. Since the structure is relatively not loose, the resonance generated by the vibration on each component is relatively small, which is conducive to reducing the overall vibration and noise. And the damping parts integrally formed on the first bracket and the second bracket have better stability and can better realize the functions of damping and noise reduction.

[0146] The present application also provides an electric toothbrush having the above-mentioned internal bracket, which can reduce noise and vibration and is conducive to improving the use comfort.

[0147] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, or an indirect connection through an intermediate medium, and may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0148] In the description of the present application, it should be understood that the terms "center", "length", "width", "thickness", "top end", "bottom end", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "axial X", "circumferential", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated position or component must have a specific orientation, be constructed and operated in a specific manner. Therefore, it should not be construed as a limitation to the present invention.

[0149] In the embodiments of the present application, it is not intended that the indicated device or component must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically and precisely defined.

[0150] The terms "first", "second", "third", "fourth", etc. (if any) in the description, claims, and the above drawings of the embodiments of the present application are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances, so that the embodiments of the present application described here, for example, can be implemented in an order other than those illustrated or described here.

[0151] In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0152] The term "a plurality of" in this text refers to two or more. The term " / and / or" in this text is merely a description of the associated relationship of associated objects, indicating that there can be three relationships. For example, A / and / or B can represent three cases: A exists alone, both A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this text generally indicates that the associated objects before and after are in an "or" relationship; in a formula, the character " / " indicates that the associated objects before and after are in a "division" relationship.

[0153] It can be understood that the various numerical numbers involved in the embodiments of this application are only for the convenience of description and are not used to limit the scope of the embodiments of this application.

[0154] It can be understood that in the embodiments of this application, the magnitudes of the sequence numbers of the above processes do not mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of this application.

Claims

1. An internal bracket for an electric toothbrush, characterized in that, The internal bracket includes a first bracket and a second bracket. The first bracket and the second bracket are buckled with each other and cover the motor and the battery. On the inner sides of the first bracket and the second bracket close to the motor and the battery, shock-absorbing parts are provided. The shock-absorbing parts are integrally formed on the first bracket and the second bracket, and the shock-absorbing parts contact and buffer at least one of the motor or the battery.

2. The internal bracket for an electric toothbrush according to claim 1, wherein, The internal bracket includes a motor fixing part for fixing the motor and a battery fixing part for fixing the battery. When the second bracket is buckled and fixed with the first bracket, the inner cross-sectional area of the battery fixing part is larger than that of the motor fixing part.

3. The internal bracket for an electric toothbrush according to claim 2, wherein, The first bracket includes a part of the motor fixing part and a part of the battery fixing part. The second bracket includes another part of the motor fixing part and another part of the battery fixing part. In the second bracket, the motor fixing part and the battery fixing part are in a stepped transition. When the second bracket is buckled and fixed with the first bracket, the width of the motor fixing part formed jointly by the second bracket and the first bracket in the buckling direction is smaller than the width of the battery fixing part formed jointly by the second bracket and the first bracket in the buckling direction.

4. The internal bracket for an electric toothbrush according to claim 1 or 2, characterized in that, The shock-absorbing part of the first bracket contacts the motor. The shock-absorbing part of the second bracket contacts the motor and the battery.

5. The internal bracket for an electric toothbrush according to claim 1 or 2, characterized in that, One of the first bracket and the second bracket is provided with a notch part, and the other is provided with a first limiting part. When the first bracket and the second bracket are buckled, the first limiting part extends into the notch part to guide and limit the installation of the first bracket and the second bracket.

6. The internal bracket for an electric toothbrush according to claim 1 or 2, characterized in that, The internal bracket includes a top wall and a bottom wall. The top wall and the bottom wall are jointly arranged on one of the first bracket and the second bracket. The top wall abuts against the motor, and the bottom wall abuts against the battery.

7. The internal bracket for an electric toothbrush according to claim 6, characterized in that, The length of the second bracket in the axial direction is relatively smaller than that of the first bracket in the axial direction. When the first bracket and the second bracket are clamped and fixed, the two ends of the second bracket in the axial direction respectively abut against the top wall and the bottom wall.

8. The internal bracket for an electric toothbrush according to claim 6, characterized in that, The bottom wall is provided with a stabilizing hole. One of the first bracket and the second bracket without the top wall and the bottom wall is provided with a stabilizing part near one end of the bottom wall. The stabilizing part extends into the stabilizing hole and is clamped to form the wall of the stabilizing hole.

9. The internal bracket for an electric toothbrush according to claim 1 or 2, characterized in that, The first bracket or the second bracket is provided with a first heat dissipation hole for dissipating heat from the motor. The first bracket or the second bracket is provided with a second heat dissipation hole for dissipating heat from the motor and the battery.

10. The internal bracket for an electric toothbrush according to claim 9, characterized in that, The first bracket is provided with a first heat dissipation hole; the second bracket is provided with a second heat dissipation hole. And the number of the second heat dissipation holes is multiple. The multiple second heat dissipation holes are arranged at intervals in the axial direction of the second bracket to dissipate heat from the motor and the battery.

11. The internal bracket for an electric toothbrush according to claim 10, characterized in that, The shape of the first heat dissipation hole is strip-shaped; and / or the shape of the second heat dissipation hole is oval.

12. The internal bracket for an electric toothbrush according to claim 3, characterized in that, The motor fixing part and the battery fixing part on the first bracket are integrally formed; or The motor fixing part and the battery fixing part on the second bracket are integrally formed.

13. The internal bracket for an electric toothbrush according to claim 3, characterized in that, The first bracket or the second bracket is a split type.

14. The internal bracket for an electric toothbrush according to claim 2 or 3, characterized in that, The first bracket and the second bracket are mutually buckled to form the complete motor fixing part and battery fixing part.

15. The internal bracket for an electric toothbrush according to claim 1 or 2, characterized in that, The first bracket is fixedly connected to the motor by screwing; and / or the second bracket is fixedly connected to the motor by screwing.

16. The internal bracket for an electric toothbrush according to claim 2, characterized in that, At least two clamping parts are provided on the motor fixing part, and the clamping parts are used for fixing the first bracket and the second bracket; the distance between the upper end of the motor fixing part and the adjacent clamping part is less than the distance between two adjacent clamping parts; And / or, at least two clamping parts are provided on the battery fixing part, and the clamping parts are used for fixing the first bracket and the second bracket; the distance between the upper end of the battery fixing part and the adjacent clamping part is less than the distance between two adjacent clamping parts.

17. The internal bracket for an electric toothbrush according to claim 16, wherein, The first bracket is provided with a clamping part, and the length of the clamping part accounts for at least 5% of the length of the first bracket or the second bracket.

18. The internal bracket for an electric toothbrush according to claim 3, characterized in that, There is no shock-absorbing part on the inner side of the part of the first bracket corresponding to the battery fixing, and there is a shock-absorbing part on the inner side of the part of the second bracket corresponding to the battery fixing.

19. The internal bracket for an electric toothbrush according to claim 18, characterized in that, There is a foam between the inner wall of the second bracket and the battery.

20. The internal bracket for an electric toothbrush according to claim 2, characterized in that, A clamping part is provided inside the transition part between the motor fixing part and the battery fixing part, and the clamping part is used for holding the motor.

21. An electric toothbrush, comprising a handle housing, characterized in that, It further includes the inner bracket described in any one of the above claims 1 to 20; the inner bracket is arranged inside the handle housing.

22. The electric toothbrush according to claim 21, wherein, The electric toothbrush further includes a circuit board, the circuit board is arranged on the first bracket, the first bracket is provided with a wire arranging hole, and the cable of the motor extends out of the wire arranging hole to extend out of the inner bracket and be electrically connected to the circuit board.

23. The electric toothbrush according to claim 22, wherein, An electrical connection part is provided on the side of the circuit board facing away from the first bracket, and the circuit board is further provided with a wire passing hole; The cable of the motor extending out of the wire passing hole passes through the wire passing hole and extends to the side of the circuit board facing away from the first bracket, and is connected to the electrical connection part.

24. The electric toothbrush according to claim 21, wherein, The electric toothbrush includes a circuit board, and a clamping part is further provided on the outer wall of the first bracket, and the clamping part is used for fixing the circuit board.

25. The electric toothbrush according to claim 24, wherein A plurality of auxiliary holes are provided in the battery fixing part, and the positions of the auxiliary holes correspond to the positions of the clamping parts one by one.

26. The electric toothbrush according to claim 24, characterized in that, The first bracket is further provided with a second limiting part, the number of the second limiting parts is at least two, and at least part of the second limiting parts are arranged at intervals in the circumferential direction of the first bracket, and the circuit board is correspondingly between the second limiting parts in the circumferential direction.

27. The electric toothbrush according to claim 26, characterized in that, The length of the second limiting part in the axial direction of the first bracket is greater than the length of the clamping part.

28. The electric toothbrush according to claim 22, wherein, The cross-sectional shape of the handle housing is triangular, and the inner bracket abuts against the inner side of the handle housing.

29. The electric toothbrush according to claim 21, characterized in that, It further includes a tail cap assembly, a threaded part is provided on the bottom wall of the inner bracket, and a threaded fastener screws the tail cap assembly to the threaded part.

30. The electric toothbrush according to claim 21, wherein, Two opposite walls of the first bracket are provided with strengthening parts, and the strengthening parts extend in the axial direction of the first bracket; a protrusion is provided on the strengthening part, and the protrusion abuts against the inner side of the handle housing.

31. The electric toothbrush according to claim 30, wherein, The protrusion rigidly abuts against the handle housing.

32. The electric toothbrush according to claim 30, characterized in that, The protrusion elastically abuts against the handle housing.

33. The electric toothbrush according to claim 21, wherein, One end of the first bracket close to the battery is provided with a bracket fixing part, and the bracket fixing part is in a stepped shape; one end of the inner side of the handle housing close to the battery is provided with a fixing groove; the protruding part of the bracket fixing part extends into the fixing groove.

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