A smart toothbrush
By introducing transmission components into smart toothbrushes, it drives small high-speed swings of braces and bristles, which solves the problem that braces toothbrushes cannot be thoroughly cleaned, and achieves efficient cleaning of the tooth surface and gaps and an improved brushing experience.
Patent Information
- Application Number
- CN201810474746.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2018-05-17
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2038-05-17
AI Technical Summary
Smart toothbrushes of braces cannot be thoroughly cleaned and brushed, and the experience is not effective. The main reason is that they cannot guarantee the vibration and swing of the bristles.
The transmission assembly is introduced into the smart toothbrush. One end of the transmission is fixedly connected to the drive motor. The transmission shell is exposed to the brace groove, which drives the braces and bristles to swing at a high speed clockwise and counterclockwise when the teeth are tightened, so as to achieve the braces and bristles Double cleaning effect.
Through the design of the transmission assembly, braces and bristles rub and vibrate at high frequency in the teeth, which can completely remove dirt from the tooth surface and gaps, improving the brushing effect and user experience.
Smart Images
Figure CN108542532B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of toiletries, and in particular provides a smart toothbrush. Background Art
[0002] At present, smart toothbrushes can be divided into two categories according to their working principles: rotating smart toothbrushes and vibrating smart toothbrushes. The principle of rotating smart toothbrushes is simple. They use motors to drive the circular brush head to rotate, which enhances the friction effect while performing traditional brushing actions. This type of toothbrush makes a lot of noise when used, and can clean the surface of teeth very cleanly, but the cleaning of the gaps between teeth and inside the teeth is relatively weak, which causes great wear on the teeth. It is not recommended to use force or use it for a long time. This type of toothbrush is relatively rare on the market and is mainly used in dental medicine. The principle of vibrating smart toothbrushes is relatively complex. According to their structure, they can be divided into ordinary electric toothbrushes and ultrasonic toothbrushes. Ordinary electric toothbrushes are toothbrushes with internal motors driving the eccentric wheel to rotate and generate vibrations, thereby driving the brush head to vibrate; ultrasonic toothbrushes are toothbrushes with ultrasonic vibration motors installed inside. The motor shaft is fixedly connected to the brush head, which can make the brush head produce high-frequency swings perpendicular to the direction of the brush handle, but the swing amplitude is very small, generally about 5mm, and the largest amplitude in the industry does not exceed 6mm. When brushing teeth, the high-frequency vibration of the brush head can efficiently clean the teeth. On the other hand, the vibration of more than 10,000 times per minute also produces a large number of tiny bubbles in the mixture of toothpaste and water in the mouth. The pressure generated when the bubbles burst can penetrate deep into the teeth to clean dirt. Vibrating toothbrushes are widely used in the market and are becoming more and more intelligent.
[0003] According to the brush head, there are two main types of vibrating smart toothbrushes: traditional brush heads and braces. The traditional brush head is similar to the traditional toothbrush, and the brushing method is also similar. You need to use your hands to brush your teeth. The difference is that the brush head of this type of toothbrush is vibrating or swinging. The technology of this type of smart toothbrush is relatively mature, and the brushing experience and effect are also very good. It is the mainstream type of smart toothbrush. The braces type smart toothbrush is also called the "lazy" toothbrush. It is a recent product. Users only need to put the braces into the mouth and bite the braces to automatically brush their teeth. There is no need to use hands to assist in the brushing process. Unlike the traditional brush head, the braces type is a whole-teeth contact brush. When biting the braces, the bristles cover the inside and outside of the teeth and the grinding surface, and brush the teeth by the vibration and swing of the bristles. The braces brush head is relatively large, and the materials used are mostly soft rubber materials. The transmission efficiency of soft rubber is low. The farther the wheelbase from the motor, the more obvious the vibration attenuation. When using it, the user needs to put the braces in the mouth and bite them. Only by ensuring that the braces have sufficient vibration and swing can the bristles be transmitted to vibrate and swing, so as to ensure that the teeth are brushed cleanly. It is difficult to achieve the requirement by simply connecting the braces to the motor. At present, the braces-type smart toothbrushes on the market basically use braces and motors to connect directly. When the braces are put into the mouth as a whole and bitten, the braces will no longer swing in the mouth, but can only vibrate, and the vibration transmitted to the bristles is very small. When the braces are bitten hard, the vibration of the distal end of the braces basically disappears, and the bristles are basically in a static state, and the effect of brushing teeth cannot be achieved. The user can only experience the vibration of the toothbrush motor, and the teeth are not brushed. After washing, it can only achieve the effect of rinsing the mouth. Therefore, the biggest bottleneck of braces-type smart toothbrushes is that they cannot thoroughly clean and brush teeth and the experience effect is poor, and the main reason is that the vibration and swing amount of the bristles cannot be guaranteed. Summary of the invention
[0004] The purpose of the present invention is to provide a smart toothbrush, aiming to solve the technical problems in the prior art that smart toothbrushes cannot clean teeth thoroughly and the brushing experience is poor.
[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a smart toothbrush, comprising a main unit, a brace and bristles arranged on the brace, the main unit comprising a main unit housing and a driving motor arranged in the main unit housing, the output shaft end of the driving motor extending from the main unit housing, the smart toothbrush also comprising a transmission assembly, the transmission assembly comprising a transmission housing arranged in the brace and a transmission member arranged in the transmission housing, one end of the transmission member extending out of the transmission housing and the brace is fixedly connected to the output shaft end of the driving motor, the other end of the transmission member extending out of the transmission housing and extending into the brace, the top and bottom of the brace are respectively provided with an upper brace groove and a lower brace groove, the end of the transmission housing away from the main unit housing is exposed at the upper brace groove and the lower brace groove so that the teeth can bite the transmission housing tightly when brushing.
[0006] Furthermore, the swing amplitude of the braces is H, the rotation angle of the drive motor is θ, the length of the swing arm is L, the displacement loss coefficient of the transmission part is γ, and it satisfies: H=2*γ*L*sin(θ / 2).
[0007] Furthermore, a accommodating cavity is provided at the end of the brace facing the main housing, and mounting grooves communicating with the accommodating cavity are respectively provided on both sides of the inner end of the accommodating cavity, and the transmission housing is placed in the accommodating cavity, and one end of the transmission housing close to the driving motor is fixedly connected to the main housing, and the transmission member includes a transmission shaft fixedly connected to the output shaft end of the driving motor and a swing arm fixed to the other end of the transmission shaft and respectively located on both sides of the transmission shaft, and the two swing arms respectively extend from both sides of the transmission housing and extend into the two mounting grooves.
[0008] Furthermore, the end of each swing arm is provided with a limiting portion, and the inner end of each mounting groove is provided with a limiting recess matching the limiting portion.
[0009] Further, the transmission housing includes an upper transmission housing and a lower transmission housing that are buckled together, and one end of the upper transmission housing close to the main housing or one end of the lower transmission housing close to the main housing is provided with a connecting column extending out of the accommodating cavity, and a fixing hole is provided on the main housing, and the connecting column extends into the fixing hole.
[0010] Further, a clamping hole is provided at the bottom of the upper transmission housing, and a clamping column is provided at the top of the lower transmission housing and extends into and is fixed in the clamping hole; or, a clamping hole is provided at the top of the lower transmission housing, and a clamping column is provided at the bottom of the upper transmission housing and extends into and is fixed in the clamping hole.
[0011] Further, the braces include an upper brace and a lower brace which are interlocked with each other, and the cross-sections of the upper brace and the lower brace are both U-shaped. The bottom of the upper brace is provided with an upper accommodating groove opening downward, and the top of the lower brace is provided with a lower accommodating groove opening upward. The upper accommodating groove and the lower accommodating groove are combined to form the accommodating cavity, and the bristles include a first upper outer bristle provided on the upper brace and arranged along the outer side of the upper brace groove, a first upper inner bristle provided on the upper brace and arranged along the inner side of the upper brace groove, a first lower outer bristle provided on the lower brace and arranged along the outer side of the lower brace groove, and a first lower inner bristle provided on the lower brace and arranged along the inner side of the lower brace groove.
[0012] Furthermore, the first upper outer bristles are arranged upwardly and tilted from the root and toward the inside of the upper braces, and the first upper inner bristles are arranged upwardly and tilted from the root and toward the outside of the upper braces; the first lower outer bristles are arranged downwardly and tilted from the root and toward the inside of the lower braces, and the first lower inner bristles are arranged downwardly and tilted from the root and toward the outside of the lower braces.
[0013] Furthermore, the upper brace and the lower brace are fixed together via a connecting assembly.
[0014] Furthermore, the upper brace is provided with a vertically penetrating upper connecting hole, the lower brace is provided with a vertically penetrating lower connecting hole corresponding to the upper connecting hole, the connecting assembly includes a fixing column and a fastener, the fixing column is provided with a fastening hole at the bottom, the fixing column is inserted into the upper connecting hole and the lower connecting hole from above the upper connecting hole, and the fastener is inserted into the fastening hole from below the lower connecting hole and fixed in the fastening hole; or, the fixing column is inserted into the lower connecting hole and the upper connecting hole from below the lower connecting hole, and the fastener is inserted into the fastening hole from above the upper connecting hole and fixed in the fastening hole.
[0015] Beneficial effects of the present invention:
[0016] In the present invention, a transmission assembly is added between the output shaft of the driving motor and the braces, one end of the transmission member in the transmission assembly is fixedly connected to the driving motor, and the transmission housing in the transmission assembly is exposed at the upper braces groove and the lower braces groove. In this way, when the driving motor is working, it drives the transmission member to swing clockwise or counterclockwise with a small amplitude and high speed. Since the teeth bite the transmission housing tightly and do not bite the braces, the braces can swing clockwise or counterclockwise with a small amplitude and high speed under the drive of the transmission member. At the same time, the bristles also swing at a high speed. Since the bristles are in close contact with the teeth, the bristles will rub and vibrate on the tooth surface at a high frequency, thereby realizing the swing and vibration of the braces, achieving a double cleaning effect, and can thoroughly remove dirt on the tooth surface and the gaps between teeth. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0018] Figure 1 A schematic diagram of the structure of a smart toothbrush provided by an embodiment of the present invention;
[0019] Figure 2 for Figure 1 Schematic diagram of the decomposition of
[0020] Figure 3 A schematic cross-sectional view of a smart toothbrush provided by an embodiment of the present invention;
[0021] Figure 4 Another cross-sectional schematic diagram of the smart toothbrush provided by an embodiment of the present invention;
[0022] Figure 5 A schematic diagram of the swing of a transmission member in a smart toothbrush provided in an embodiment of the present invention;
[0023] Among them, the reference numerals in the figure are:
[0024] 100-host; 110-host housing; 120-drive motor; 121-output shaft; 200-braces; 210-upper braces groove; 220-lower braces groove; 230-accommodating chamber; 240-installation groove; 250-upper braces; 251-upper accommodating groove; 252-first upper outer bristle; 253-first upper inner bristle; 254-upper connecting hole; 260-lower braces; 261-lower accommodating groove; 262-first 1-lower outer bristle; 263-first lower inner bristle; 264-lower connecting hole; 300-transmission assembly; 310-transmission housing; 311-connecting column; 312-upper transmission housing; 313-lower transmission housing; 314-clamping column; 320-transmission member; 321-transmission shaft; 322-swing arm; 323-limiting part; 400-connecting assembly; 410-fixing column; 411-fastening hole; 420-fastener. DETAILED DESCRIPTION
[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.
[0026] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0029] Please refer to Figure 1 , Figure 2 The embodiment of the present invention provides a smart toothbrush, comprising a host 100, a toothbrush 200 and bristles arranged on the toothbrush 200, wherein the host 100 comprises a host housing 110 and a driving motor 120 arranged in the host housing 110, wherein an end of an output shaft 121 of the driving motor 120 extends out of the host housing 110, and the smart toothbrush further comprises a transmission assembly 300, wherein the transmission assembly 300 comprises a transmission housing 310 arranged in the toothbrush 200 and a transmission member 310 arranged in the transmission housing 310. 20, one end of the transmission member 320 extends out of the transmission housing 310 and the mouthpiece 200 is fixedly connected to the end of the output shaft 121 of the driving motor 120, and the other end of the transmission member 320 extends out of the transmission housing 310 and extends into the mouthpiece 200, and the upper mouthpiece groove 210 and the lower mouthpiece groove 220 are respectively provided at the top and the bottom of the mouthpiece 200, and the end of the transmission housing 310 away from the main body housing 110 is exposed at the upper mouthpiece groove 210 and the lower mouthpiece groove 220 so that the teeth can bite the transmission housing 310 when brushing.
[0030] In the embodiment of the present invention, a transmission assembly 300 is added between the output shaft 121 of the driving motor 120 and the braces 200, one end of the transmission member 320 in the transmission assembly 300 is fixedly connected to the driving motor 120, and the transmission housing 310 in the transmission assembly 300 is exposed at the upper braces groove 210 and the lower braces groove 220. In this way, when the driving motor 120 is working, it drives the transmission member 320 to swing clockwise or counterclockwise with a small amplitude and high speed. Since the teeth are tightly bitten on the transmission housing 310 and do not bite the braces 200, the braces 200 can be driven by the transmission member 320 to swing clockwise or counterclockwise with a small amplitude and high speed. At the same time, the bristles also swing at a high speed. Since the bristles are in close contact with the teeth, the bristles will rub and vibrate on the tooth surface at a high frequency, thereby realizing the swing and vibration of the braces 200, achieving a double cleaning effect, and can thoroughly remove dirt on the tooth surface and the gaps between teeth.
[0031] Since the swing amplitude of the mouthpiece 200 in the oral cavity directly affects the user's experience, a suitable swing will not make the user feel uncomfortable, and will also make the user feel that they are brushing their teeth. At the same time, the swing amplitude is also related to the friction stroke between the bristles and the tooth surface. Figure 5 , assuming that the swing amplitude of the mouthpiece 200 is H, the rotation angle of the drive motor 120 is θ, the length of the swing arm is L, and the offset loss coefficient of the transmission member 320 is γ, the above parameters satisfy: H = 2*γ*L*sin(θ / 2). According to this formula, the swing amplitude that meets the needs of different age groups can be designed by adjusting the rotation angle θ of the drive motor 120, the length of the swing arm L, and the offset loss coefficient γ of the transmission member 320.
[0032] Reference Figure 3 , Figure 4 In this embodiment, a receiving chamber 230 is provided at the end of the braces 200 facing the main housing 110, and the opening of the receiving chamber 230 faces the main housing 110. Both sides of the inner end of the receiving chamber 230 are respectively provided with mounting grooves 240 connected thereto. The transmission housing 310 is placed in the receiving chamber 230, and one end of the transmission housing 310 close to the driving motor 120 extends from the opening and is fixedly connected to the main housing 110. The transmission member 320 includes a transmission shaft 321 fixedly connected to the end of the output shaft 121 of the driving motor 120 and a swing arm 322 fixed to the other end of the transmission shaft 321 and respectively located on both sides of the transmission shaft 321. The two swing arms 322 respectively extend from both sides of the transmission housing 310 and extend into the two mounting grooves 240.
[0033] In this embodiment, the transmission member 320 is designed as a structure composed of a transmission shaft 321 and two swing arms 322. On the one hand, it realizes a fixed connection with the output shaft 121 of the drive motor 120. On the other hand, it realizes that the braces 200 are driven to vibrate through the two swing arms under the premise that the transmission housing 310 does not move. This structure is simple, occupies little space, and has high transmission efficiency.
[0034] Furthermore, in this embodiment, each swing arm 322 has a limiting portion 323 at its end, and each mounting slot 240 has a limiting recess at its inner end that matches the limiting portion 323. By fixing the limiting portion 323 in the limiting recess, the swing arm 322 is limited to prevent it from sliding along the mounting slot 240.
[0035] In order to facilitate the installation of the transmission member 320 and the processing of the transmission housing 310, the transmission housing 310 is designed to be composed of two parts. That is, the transmission housing 310 includes an upper transmission housing 312 and a lower transmission housing 313 that are buckled together. Among them, in this embodiment, the end of the upper transmission housing 312 close to the main body housing 110 is provided with a connecting column 311 extending out of the accommodating cavity 230, and the main body housing 110 is provided with a fixing hole (not shown in the figure), and the connecting column 311 extends into the fixing hole. In this way, the transmission housing 310 and the main body housing 110 are fixedly connected by the connecting column 311. Of course, the connecting column 311 can also be provided on the end of the lower transmission housing 313 close to the main body housing 110.
[0036] Specifically, a clamping hole (not shown in the figure) is provided at the bottom of the upper transmission housing 312, and a clamping column 314 is provided at the top of the lower transmission housing 313 to extend into and be clamped in the clamping hole, and the upper transmission housing 312 and the lower transmission housing 313 are fixed together by the clamping connection between the clamping column 314 and the clamping hole. Of course, the positions of the clamping hole and the clamping column 314 can also be interchanged, that is, the clamping hole is set at the top of the lower transmission housing 313, and the clamping column 314 is set at the bottom of the upper transmission housing 312.
[0037] In this embodiment, in order to facilitate the installation of the braces 200 and also facilitate the processing and forming of the braces 200, the braces 200 is also composed of two parts. The braces 200 includes an upper brace 250 and a lower brace 260 that are interlocked, and the cross-sections of the upper brace 250 and the lower brace 260 are both U-shaped. An upper accommodating groove 251 with an opening facing downward is provided at the bottom of the upper brace 250, and a lower accommodating groove 261 with an opening facing upward is provided at the top of the lower brace 260. The upper accommodating groove 251 and the lower accommodating groove 261 enclose the accommodating cavity 230. In this embodiment, the bristles include a first upper outer bristle 252 provided on the upper brace 250 and arranged along the outer side of the upper brace groove 210, a first upper inner bristle 253 provided on the upper brace 250 and arranged along the inner side of the upper brace groove 210, a first lower outer bristle 262 provided on the lower brace 260 and arranged along the outer side of the lower brace groove 220, and a first lower inner bristle 263 provided on the lower brace 260 and arranged along the inner side of the lower brace groove 220.
[0038] Furthermore, the first upper outer bristles 252 are arranged to be tilted upward from the root and toward the inside of the upper braces 250, and the first upper inner bristles 253 are arranged to be tilted upward from the root and toward the outside of the upper braces 250; the first lower outer bristles 262 are arranged to be tilted downward from the root and toward the inside of the lower braces 260, and the first lower inner bristles 263 are arranged to be tilted downward from the root and toward the outside of the lower braces 260. In this way, a constricted cleaning space is formed between the first upper inner bristles 253 and the first upper outer bristles 252, and the upper teeth are correspondingly located in the cleaning space. This constriction forms a clamping shape, so that the first upper inner bristles 253 and the first upper outer bristles 252 are in close contact with the inner and outer tooth surfaces of the upper teeth. When the driving motor 120 is working, the first upper inner bristles 253 and the first upper outer bristles 252 rub and vibrate on the inner and outer surfaces of the upper teeth at a high frequency, which can thoroughly remove dirt on the tooth surface and the gaps between teeth; and a constricted cleaning space is also formed between the first lower inner bristles 263 and the first lower outer bristles 262, which also achieves the above-mentioned effect.
[0039] In this embodiment, the upper brace 250 and the lower brace 260 are fixed together via a connecting assembly 400 .
[0040] Specifically, the upper brace 250 is provided with an upper connecting hole 254 which is vertically penetrated, and the lower brace 260 is provided with a lower connecting hole 264 which is vertically penetrated and corresponds to the upper connecting hole 254. The connecting assembly 400 includes a fixing column 410 and a fastener 420. The fixing column 410 is provided with a fastening hole 411 at the bottom. The fixing column 410 is inserted into the upper connecting hole 254 and the lower connecting hole 264 from the top of the upper connecting hole 254, and the fastener 420 is inserted and fixed in the fastening hole 411 from the bottom of the lower connecting hole 264. Of course, the fixing column 410 can also be inserted into the lower connecting hole 264 and the upper connecting hole 254 from the bottom of the lower connecting hole 264, and the fastener 420 can be inserted and fixed in the fastening hole 411 from the top of the upper connecting hole 254. Of course, other detachable connecting structures can also be used between the upper brace 250 and the lower brace 260.
[0041] The working principle of the smart toothbrush provided in the present invention is: put the toothbrush cap 200 into the oral cavity, start the main unit 100, and the output shaft 121 of the driving motor 120 drives the transmission shaft 321 to swing clockwise and counterclockwise with a small amplitude and high speed. Since the teeth bite the transmission housing 310 and do not bite the crown 200, the crown 200 can swing clockwise and counterclockwise with a small amplitude and high speed under the drive of the transmission member 320, and the bristles also swing at a high speed. At the same time, since the bristles are in close contact with the teeth, the bristles will rub and vibrate on the tooth surface at a high frequency, thereby realizing the swing and vibration of the crown 200, and more thoroughly removing the dirt on the tooth surface and the gaps between the teeth, and effectively solving the problem of unclean and incomplete brushing.
[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A smart toothbrush, comprising a main unit, a toothbrush and bristles arranged on the toothbrush, wherein the main unit comprises a main unit housing and a driving motor arranged in the main unit housing, wherein the output shaft end of the driving motor extends out of the main unit housing, and wherein: The smart toothbrush further comprises a transmission assembly, the transmission assembly comprising a transmission housing arranged in the braces and a transmission member arranged in the transmission housing, one end of the transmission member extending out of the transmission housing and the braces is fixedly connected to the end of the output shaft of the driving motor, the other end of the transmission member extending out of the transmission housing and extending into the braces, the top and bottom of the braces are respectively provided with an upper braces groove and a lower braces groove, the end of the transmission housing away from the main housing is exposed at the upper braces groove and the lower braces groove so that the teeth can bite the transmission housing tightly when brushing teeth; The transmission member includes a transmission shaft fixedly connected to the output shaft end of the driving motor and swing arms fixed to the other end of the transmission shaft and respectively located on both sides of the transmission shaft, and the two swing arms respectively extend from both sides of the transmission housing and extend into the toothed sleeve; The dental brace is driven by the swing arm to swing clockwise or counterclockwise, thereby driving the bristles to swing; The end of the braces facing the main housing is provided with a accommodating cavity, and the inner ends of the accommodating cavity are respectively provided with mounting grooves connected thereto, the transmission housing is placed in the accommodating cavity, and one end of the transmission housing close to the driving motor is fixedly connected to the main housing, and the two swing arms extend into the two mounting grooves.
2. The smart toothbrush according to claim 1, characterized in that: The swing amplitude of the braces is H, the rotation angle of the drive motor is θ, the length of the swing arm is L, the displacement loss coefficient of the transmission part is γ, and it satisfies: H=2*γ*L*sin(θ / 2).
3. The smart toothbrush according to claim 1 or 2, characterized in that: The end of each swing arm is provided with a limiting portion, and the inner end of each mounting groove is provided with a limiting recess matching the limiting portion.
4. The smart toothbrush according to claim 1 or 2, characterized in that: The transmission housing includes an upper transmission housing and a lower transmission housing that are buckled together. One end of the upper transmission housing close to the main housing or one end of the lower transmission housing close to the main housing is provided with a connecting column extending out of the accommodating cavity. The main housing is provided with a fixing hole, and the connecting column extends into the fixing hole.
5. The smart toothbrush according to claim 4, characterized in that: A clamping hole is provided at the bottom of the upper transmission housing, and a clamping column is provided at the top of the lower transmission housing and extends into and is fixed in the clamping hole; or, a clamping hole is provided at the top of the lower transmission housing, and a clamping column is provided at the bottom of the upper transmission housing and extends into and is fixed in the clamping hole.
6. The smart toothbrush according to claim 1 or 2, characterized in that: The braces include an upper brace and a lower brace which are interlocked with each other, and the cross-sections of the upper brace and the lower brace are both U-shaped. The bottom of the upper brace is provided with an upper accommodating groove which opens downward, and the top of the lower brace is provided with a lower accommodating groove which opens upward. The upper accommodating groove and the lower accommodating groove are combined to form the accommodating cavity, and the bristles include a first upper outer bristle which is provided on the upper brace and arranged along the outer side of the upper brace groove, a first upper inner bristle which is provided on the upper brace and arranged along the inner side of the upper brace groove, a first lower outer bristle which is provided on the lower brace and arranged along the outer side of the lower brace groove, and a first lower inner bristle which is provided on the lower brace and arranged along the inner side of the lower brace groove.
7. The smart toothbrush according to claim 6, characterized in that: The first upper outer bristles are arranged upwardly and tilted from the root and toward the inside of the upper braces, and the first upper inner bristles are arranged upwardly and tilted from the root and toward the outside of the upper braces; the first lower outer bristles are arranged downwardly and tilted from the root and toward the inside of the lower braces, and the first lower inner bristles are arranged downwardly and tilted from the root and toward the outside of the lower braces.
8. The smart toothbrush according to claim 6, characterized in that: The upper brace and the lower brace are fixed together via a connecting component.
9. The smart toothbrush according to claim 8, characterized in that: The upper brace is provided with an upper connecting hole which passes vertically therethrough, and the lower brace is provided with a lower connecting hole which passes vertically therethrough and corresponds to the upper connecting hole. The connecting assembly comprises a fixing column and a fastener. A fastening hole is provided at the bottom of the fixing column. The fixing column is inserted into the upper connecting hole and the lower connecting hole from above the upper connecting hole, and the fastener is inserted into the fastening hole from below the lower connecting hole and fixed therein; or, the fixing column is inserted into the lower connecting hole and the upper connecting hole from below the lower connecting hole, and the fastener is inserted into the fastening hole from above the upper connecting hole and fixed therein.