An electric toothbrush handle and an electric toothbrush

Abstract

This application provides an electric toothbrush handle and an electric toothbrush, relating to the field of oral hygiene technology. The electric toothbrush handle includes a support, a motor assembly, and a load component. The motor assembly includes a motor body and an elastic element. The motor body is mounted on the support and has an output shaft. The elastic element is connected to the motor body. The load component is mounted on the support and has a first load surface. When the output shaft is not affected by other external forces, the elastic element drives the output shaft to abut against the first load surface. The first load surface restricts the movement of the output shaft, thereby reducing the vibration of the toothbrush head to a certain extent and preventing toothpaste foam from splashing. When the toothbrush head abuts against the tooth surface, the reaction force from the teeth is transmitted to the output shaft, overcoming the elastic force of the elastic element and separating the output shaft from the first load surface. At this time, the output shaft is no longer restricted by the first load surface and can smoothly drive the toothbrush head to vibrate, operating normally.

Description

Technical Field

[0001] This application relates to the field of oral hygiene technology, and more particularly to an electric toothbrush handle and an electric toothbrush. Background Technology

[0002] Electric toothbrushes work by using a motor to rotate rapidly left and right, causing the brush head to vibrate at high frequency. This instantly breaks down toothpaste into fine foam, which then deeply cleans between teeth. During the use of an electric toothbrush, when the user temporarily removes the toothbrush from their mouth to change brushing areas, or when the user removes the toothbrush from their mouth after brushing, residual toothpaste foam will splatter everywhere.

[0003] To prevent toothpaste foam from splashing, existing electric toothbrushes require specialized control chips and sensing components, resulting in high material costs. Summary of the Invention

[0004] The purpose of this application is to provide an electric toothbrush handle and an electric toothbrush, which aims to solve the technical problem of high material costs in existing electric toothbrushes when preventing toothpaste foam from splashing.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] In a first aspect, embodiments of this application provide an electric toothbrush handle, including a bracket, a motor assembly, and a load component;

[0007] The motor assembly includes a motor body and an elastic element. The motor body is mounted on the bracket and has an output shaft. The elastic element is connected to the motor body.

[0008] The load component is disposed on the bracket, and the load component has a first load surface;

[0009] The output shaft is driven by the elastic element to abut against the first load surface, and the first load surface restricts the movement of the output shaft when it abuts against the output shaft.

[0010] In one embodiment of the first aspect, the angle between the first load surface and the length direction of the electric toothbrush handle is no greater than 0.5°.

[0011] In one embodiment of the first aspect, the load component has a second load surface located on the side of the output shaft opposite to the first load surface, the second load surface restricting the movement of the output shaft when it abuts against the output shaft.

[0012] In one embodiment of the first aspect, both the first load surface and the second load surface are inclined relative to the length direction of the electric toothbrush handle.

[0013] In one embodiment of the first aspect, the angle between the first load surface and the length direction of the electric toothbrush handle is smaller than the angle between the second load surface and the length direction of the electric toothbrush handle.

[0014] In one embodiment of the first aspect, the angle between the second load surface and the length direction of the electric toothbrush handle is greater than 0.5° and less than 2°.

[0015] In one embodiment of the first aspect, the electric toothbrush handle further includes an alarm unit electrically connected to the motor body, the alarm unit triggering an alarm when the output shaft abuts against the second load surface.

[0016] In one embodiment of the first aspect, the bracket has a slot at one end near the output shaft, and the load component is embedded in the slot along the length of the electric toothbrush handle.

[0017] In one embodiment of the first aspect, the bracket is provided with a flexible sealing cover at one end near the output shaft, the flexible sealing cover closes the slot, and the output shaft passes through the flexible sealing cover.

[0018] Secondly, embodiments of this application also provide an electric toothbrush, including the electric toothbrush handle as described in the above embodiments.

[0019] The beneficial effects of this application are as follows: This application proposes an electric toothbrush handle and an electric toothbrush. The electric toothbrush includes the electric toothbrush handle, wherein the electric toothbrush handle includes a bracket, a motor assembly, and a load component; the motor assembly includes a motor body and an elastic element, the motor body is disposed on the bracket, the motor body has an output shaft, and the elastic element is connected to the motor body; the load component is disposed on the bracket, and the load component has a first load surface; wherein the output shaft is driven by the elastic element to abut against the first load surface, and the first load surface restricts the movement of the output shaft when abutting against the output shaft.

[0020] After the motor assembly is started, and the output shaft is not affected by other external forces, the elastic element drives the output shaft to abut against the first load surface. The first load surface restricts the movement of the output shaft, thereby reducing the vibration of the toothbrush head to a certain extent and preventing toothpaste foam from splashing. When the toothbrush head is located in the mouth and abuts against the tooth surface, the reaction force from the teeth is transmitted to the output shaft, overcoming the elastic force of the elastic element and separating the output shaft from the first load surface. At this time, the output shaft is no longer restricted by the first load surface and can smoothly drive the toothbrush head to vibrate, operating normally.

[0021] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This illustration shows a schematic diagram of the internal structure of an electric toothbrush handle according to an embodiment of this application;

[0024] Figure 2 This invention provides a schematic diagram of the structure of a load component in an electric toothbrush handle according to an embodiment of the present application.

[0025] Figure 3 A schematic diagram of the external structure of an electric toothbrush handle according to an embodiment of this application is shown;

[0026] Figure 4 This invention provides a schematic diagram of the structure of a motor assembly in an electric toothbrush handle according to an embodiment of the present application.

[0027] Figure 5 This illustration shows a schematic diagram of the relative positional relationship between the load component and the output shaft in an electric toothbrush handle according to an embodiment of this application;

[0028] Figure 6 This illustration shows a schematic diagram of the connection relationship between the load component and the bracket in an electric toothbrush handle according to an embodiment of this application.

[0029] Explanation of key component symbols:

[0030] 100-Bracket; 110-Slot; 120-Flexible sealing cover; 200-Motor assembly; 210-Motor body; 211-Output shaft; 211a-Side; 220-Elastic element; 300-Load component; 310-First load surface; 320-Second load surface; 400-Control component; 500-Battery assembly; 600-Charging component; 700-Housing. Detailed Implementation

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

[0032] It should be noted that when an element is said to be "fixed" to another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. Conversely, when an element is said to be "directly" on another element, there is no intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the template description is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] Example 1

[0037] Please see Figure 1 This embodiment provides an electric toothbrush handle for use in electric toothbrushes. The electric toothbrush handle includes a bracket 100, a motor assembly 200, and a load component 300, wherein the motor assembly 200 and the load component 300 are both mounted on the bracket 100.

[0038] Specifically, the motor assembly 200 consists of a motor body 210 and an elastic element 220. The motor body 210 is mounted on the bracket 100 and is movable relative to the bracket 100. The motor body 210 has an output shaft 211 for connecting the toothbrush head of the electric toothbrush.

[0039] When in use, the motor body 210 drives the output shaft 211 to rotate alternately in both directions at a high frequency, thereby causing the output shaft 211 to vibrate, which in turn drives the toothbrush head to vibrate and clean the teeth.

[0040] In addition, the elastic element 220 is connected to the motor body 210 and enables the motor body 210 to engage with the load component 300 to prevent toothpaste foam from splashing.

[0041] Please refer to the following: Figure 1 and Figure 2 Specifically, the load component 300 is fixedly mounted on the bracket 100, and the load component 300 has a first load surface 310. The elastic member 220 can drive the output shaft 211 to abut against the first load surface 310, and the first load surface 310 can restrict the movement of the output shaft 211 when it abuts against the output shaft 211.

[0042] In this embodiment, the load component 300 is made of silicone.

[0043] After the motor assembly 200 is started, and the output shaft 211 is not affected by other external forces, the elastic element 220 drives the output shaft 211 to abut against the first load surface 310. The first load surface 310 then restricts the movement of the output shaft 211, thereby reducing the vibration amplitude of the output shaft 211. At this time, the vibration amplitude of the toothbrush head also decreases, and toothpaste foam will not splash.

[0044] When the toothbrush head is inside the mouth and against the tooth surface, the reaction force from the teeth is transmitted to the output shaft 211, overcoming the elastic force of the elastic element 220 and causing the output shaft 211 to separate from the first load surface 310. At this time, the output shaft 211 is no longer restricted by the first load surface 310 and can smoothly drive the toothbrush head to vibrate and work normally.

[0045] Compared to existing electric toothbrushes that require control chips and sensing components to prevent toothpaste foam from splashing, the electric toothbrush handle described above can achieve this function using only the load component 300 and the elastic element 220. Furthermore, the proper functioning of the electric toothbrush handle depends on whether the toothbrush head is in contact with the tooth surface, eliminating the need for feedback and control from electronic components, thus significantly reducing material costs.

[0046] Example 2

[0047] Please refer to the following: Figure 1 and Figure 3This embodiment provides an electric toothbrush handle for use in electric toothbrushes. The electric toothbrush handle comprises a bracket 100, a motor assembly 200, a load component 300, a control component 400, a battery component 500, a charging component 600, and a housing 700. The motor assembly 200, load component 300, control component 400, battery component 500, and charging component 600 are all mounted on the bracket 100, while the housing 700 covers the bracket 100, motor assembly 200, load component 300, control component 400, battery component 500, and charging component 600.

[0048] The bracket 100 is elongated, and its length is also the length of the entire electric toothbrush handle, denoted as the first direction (shown as x in the diagram). The motor assembly 200, battery assembly 500, and charging assembly 600 are arranged sequentially along the length of the bracket 100. The control assembly 400 is also arranged along the length of the bracket 100 and is electrically connected to the motor assembly 200, battery assembly 500, and charging assembly 600. Furthermore, the load component 300 is located at one end of the bracket 100 and cooperates with the motor assembly 200.

[0049] Please refer to the following: Figure 1 and Figure 4 Specifically, the motor assembly 200 consists of a motor body 210 and an elastic element 220.

[0050] The motor body 210 and the elastic element 220 are integrally formed, and the motor body 210 is connected to the bracket 100 through the elastic element 220. Utilizing the elastic deformability of the elastic element 220, the motor body 210 can move relative to the bracket 100. Furthermore, the motor body 210 has an output shaft 211. The output shaft 211 extends from one end of the housing 700 along its length and is used to connect the toothbrush head of the electric toothbrush.

[0051] The length of the outer casing 700 is parallel to the length of the bracket 100. In use, the motor body 210 drives the output shaft 211 to rotate alternately in both directions at a high frequency, thereby causing the output shaft 211 to vibrate, which in turn drives the toothbrush head to vibrate and clean the teeth.

[0052] Without the load component 300, the axis of the output shaft 211 is parallel to the first direction, which is the same as that of a conventional electric toothbrush handle.

[0053] The elastic element 220 is made of manganese steel and is arranged along the first direction. Both ends of the elastic element 220 along the first direction are bolted and fixed to the bracket 100. The middle part of the elastic element 220 passes through the motor body 210 and drives the motor body 210 to drive the output shaft 211 to cooperate with the load component 300 in the second direction.

[0054] The second direction is perpendicular to the first direction, illustrated by the y-direction in the diagram, with the direction from the motor body 210 to the control component 400 defined as the positive direction of the second direction. Furthermore, the bristles on the toothbrush head are positioned on one side of the toothbrush head along the positive direction of the second direction.

[0055] Please refer to the following: Figure 4 and Figure 5 Specifically, the load component 300 is fixedly mounted on the bracket 100, and the load component 300 has a first load surface 310 and a second load surface 320. The first load surface 310 is located on the side of the output shaft 211 along the first direction, and the second load surface 320 is located on the side of the output shaft 211 along the first direction in the opposite direction. When either the first load surface 310 or the second load surface 320 abuts against the output shaft 211, it can restrict the movement of the output shaft 211.

[0056] When the output shaft 211 is not affected by other external forces, the elastic element 220 drives the output shaft 211 to abut against the first load surface 310 in the second direction. The first load surface 310 then restricts the movement of the output shaft 211, reducing the vibration amplitude of the output shaft 211. At this time, even if the motor body 210 is turned on, the output shaft 211 cannot smoothly drive the toothbrush head to vibrate, and the vibration amplitude of the toothbrush head is correspondingly reduced, preventing toothpaste foam from splashing. Here, "other external forces" refers to the forces transmitted from the toothbrush head to the output shaft 211.

[0057] When the toothbrush head is in the mouth and against the tooth surface, the reaction force from the teeth on the toothbrush head is in the opposite direction of the second direction. This reaction force can overcome the elastic force of the elastic element 220, causing the output shaft 211 to move in the opposite direction of the second direction, thereby separating the output shaft 211 from the first load surface 310. At this time, the output shaft 211 is no longer restricted by the first load surface 310 and can smoothly drive the toothbrush head to vibrate and work normally.

[0058] Compared to existing electric toothbrushes that require control chips and sensing components to prevent toothpaste foam from splashing, this electric toothbrush handle achieves this function using only a load component 300 and an elastic element 220. Furthermore, the proper functioning of the electric toothbrush handle depends on whether the toothbrush head is in contact with the tooth surface, eliminating the need for feedback and control from electronic components, thus significantly reducing material costs.

[0059] If the user brushes their teeth too hard, the reaction force will cause the output shaft 211 to move in the second direction until it comes into contact with the second load surface 320. At this time, the second load surface 320 restricts the movement of the output shaft 211, the vibration of the toothbrush head is reduced, and thus the gums are protected.

[0060] In this embodiment, the motor body 210 is rotatably mounted on the bracket 100. Correspondingly, the first load surface 310 and the second load surface 320 are both inclined relative to the first direction.

[0061] As previously described, without the load component 300, the axis of the output shaft 211 is parallel to the first direction, and the side 211a of the output shaft 211 along the positive side of the second direction is also parallel to the first direction. The first load surface 310, which is inclined relative to the first direction, interferes with this side 211a of the output shaft 211, thereby restricting the movement of the output shaft 211.

[0062] Of course, the load component 300 and the output shaft 211 cannot overlap. In fact, compared to the case without the load component 300, when the load component 300 is provided, the output shaft 211 is restricted by the load component 300, and the motor body 210, including the output shaft 211, rotates in the opposite direction by a certain angle in the second direction. At the same time, the elastic element 220 is in a deformed state, driving the motor body 210 to tend to rotate in the forward direction in the second direction, so that the output shaft 211 abuts against the first load surface 310.

[0063] Furthermore, in this embodiment, the angle between the first load surface 310 and the first direction is smaller than the angle between the second load surface 320 and the first direction.

[0064] In the initial state, the output shaft 211 is in line contact with the first load surface 310. When the toothbrush head is subjected to a reaction force from the teeth, the reaction force is transmitted to the output shaft 211, causing the motor body 210, including the output shaft 211, to rotate in the opposite direction in the second direction until the output shaft 211 abuts against the second load surface 320.

[0065] Obviously, compared to when the output shaft 211 abuts against the first load surface 310, when the output shaft 211 abuts against the second load surface 320, the motor body 210, including the output shaft 211, rotates at a larger angle in the opposite direction along the second direction. In order to make the output shaft 211 and the second load surface 320 in line contact, the angle between the second load surface 320 and the first direction must be greater than the angle between the first load surface 310 and the first direction.

[0066] In this embodiment, the angle between the first load surface 310 and the first direction is no greater than 0.5°. At this time, the initial pressure between the output shaft 211 and the first load surface 310 is moderate, and the first load surface 310 can effectively restrict the movement of the output shaft 211. The user can separate the output shaft 211 from the first load surface 310 by pressing the toothbrush head against the tooth surface with a small force.

[0067] In this embodiment, the angle between the second load surface 320 and the first direction is greater than 0.5° and less than 2°. If the angle between the second load surface 320 and the first direction exceeds 2°, the pressure of the toothbrush head against the tooth surface will be too great when the output shaft 211 contacts the second load surface 320, which may easily damage the gums.

[0068] Furthermore, when the toothbrush head is subjected to a reaction force of 30g (approximately 0.3N) from the teeth, this reaction force is exactly canceled out by the elastic force of the elastic element 220. There is no interaction force between the output shaft 211 and the first load surface 310, and the output shaft 211 can smoothly drive the toothbrush head to vibrate, so that the electric toothbrush handle can work normally.

[0069] When the toothbrush head experiences a reaction force of 200g (approximately 2N) from the teeth, the elastic element 220 deforms sufficiently to allow the output shaft 211 to come into contact precisely with the second load surface 320. At this point, the second load surface 320 restricts the movement of the output shaft 211, reducing the vibration of the toothbrush head and thus protecting the gums.

[0070] The magnitude of the 30g reaction force is the gravitational force corresponding to a 30g mass, and the magnitude of the 200g reaction force is the gravitational force corresponding to a 200g mass.

[0071] Please see Figure 6 Furthermore, in this embodiment, the load component 300 is sleeved on the output shaft 211. In addition, the bracket 100 has a slot 110 at one end near the output shaft 211, and the load component 300 is embedded in the slot 110 along the first direction and is interference-fitted with the inner wall of the slot 110.

[0072] When assembling the electric toothbrush handle, first put the load component 300 on the output shaft 211, then insert the load component 300 into the slot 110 along the first direction, and in the process of inserting into the slot 110, force the motor body 210, including the output shaft 211, to deviate from the initial position and cause the elastic element 220 to deform, thereby achieving the function of preventing toothpaste foam from splashing.

[0073] Compared to existing electric toothbrushes that require specialized control chips and sensing components, the electric toothbrush handle described above has a simpler structure and is easier to assemble, significantly reducing material and labor costs.

[0074] Furthermore, a flexible sealing cover 120 is provided at one end of the bracket 100 near the output shaft 211. The flexible sealing cover 120 closes the slot 110, and the output shaft 211 passes through the flexible sealing cover 120. Since the flexible sealing cover 120 can fit tightly against the output shaft 211 without restricting the vibration of the output shaft 211, the flexible sealing cover 120 can seal the slot 110 without affecting the normal operation of the output shaft 211.

[0075] Please refer to it again. Figure 1 Specifically, the control component 400 is electrically connected to the motor body 210, and the user controls the opening and closing of the motor body 210 through the control component 400.

[0076] In this embodiment, the control component 400 is a PCB board.

[0077] Furthermore, the control component 400 is equipped with an alarm unit, which is also electrically connected to the motor body 210. When the output shaft 211 comes into contact with the second load surface 320, the alarm unit sounds an alarm to remind the user to brush their teeth too hard.

[0078] Specifically, both the battery assembly 500 and the charging assembly 600 are electrically connected to the control assembly 400. The battery assembly 500 supplies power to the control assembly 400 and the motor body 210, while the charging assembly 600 charges the battery assembly 500 through the control assembly 400.

[0079] This embodiment also provides an electric toothbrush, including a toothbrush head and the aforementioned electric toothbrush handle. The toothbrush head is inserted into and engaged with the output shaft 211.

[0080] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limitations; therefore, other examples of exemplary embodiments may have different values.

[0081] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0082] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. An electric toothbrush handle, characterized in that The electric toothbrush handle comprises a support, a motor assembly and a load component. The motor assembly comprises a motor body and an elastic member, the motor body is arranged on the support, the motor body has an output shaft, and the elastic member is connected with the motor body. The load component is arranged on the support, and the load component has a first load surface. When the output shaft is not affected by other external forces, the output shaft is driven by the elastic member to abut against the first load surface, and the first load surface limits the movement of the output shaft when abutting against the output shaft. When the toothbrush head is located in the oral cavity and abuts against the tooth surface, the reaction force from the tooth, which is borne by the toothbrush head, is transmitted to the output shaft, so that the output shaft is separated from the first load surface.

2. The electric toothbrush handle of claim 1, wherein The included angle between the first load surface and the length direction of the electric toothbrush handle is not greater than 0.5°.

3. The electrically powered toothbrush handle of claim 1, wherein The load component has a second load surface, the second load surface is located on the side of the output shaft away from the first load surface, and the second load surface limits the movement of the output shaft when abutting against the output shaft.

4. The electrically powered toothbrush handle of claim 3, wherein The first load surface and the second load surface are both arranged obliquely relative to the length direction of the electric toothbrush handle.

5. The electrically powered toothbrush handle of claim 3, wherein The included angle between the first load surface and the length direction of the electric toothbrush handle is smaller than the included angle between the second load surface and the length direction of the electric toothbrush handle.

6. The electrically powered toothbrush handle of claim 3, wherein The included angle between the second load surface and the length direction of the electric toothbrush handle is greater than 0.5° and less than 2°.

7. The electrically powered toothbrush handle according to any one of claims 3 to 6, characterized in that The electric toothbrush handle further comprises an alarm unit, the alarm unit is electrically connected with the motor body, and the alarm unit alarms when the output shaft abuts against the second load surface.

8. The electric toothbrush handle according to any one of claims 1 to 6, wherein One end of the support close to the output shaft is provided with a clamping groove, and the load component is embedded in the clamping groove along the length direction of the electric toothbrush handle.

9. The electrically powered toothbrush handle of claim 8, wherein, One end of the support close to the output shaft is provided with a flexible sealing cover, the flexible sealing cover seals the clamping groove, and the output shaft penetrates through the flexible sealing cover.

10. An electric toothbrush characterized by comprising: The electric toothbrush handle comprises a support, a motor assembly and a load component. The motor assembly comprises a motor body and an elastic member, the motor body is arranged on the support, the motor body has an output shaft, and the elastic member is connected with the motor body. The load component is arranged on the support, and the load component has a first load surface. When the output shaft is not affected by other external forces, the output shaft is driven by the elastic member to abut against the first load surface, and the first load surface limits the movement of the output shaft when abutting against the output shaft. When the toothbrush head is located in the oral cavity and abuts against the tooth surface, the reaction force from the tooth, which is borne by the toothbrush head, is transmitted to the output shaft, so that the output shaft is separated from the first load surface. The included angle between the first load surface and the length direction of the electric toothbrush handle is not greater than 0.5°. The load component has a second load surface, the second load surface is located on the side of the output shaft away from the first load surface, and the second load surface limits the movement of the output shaft when abutting against the output shaft. The first load surface and the second load surface are both arranged obliquely relative to the length direction of the electric toothbrush handle. The included angle between the first load surface and the length direction of the electric toothbrush handle is smaller than the included angle between the second load surface and the length direction of the electric toothbrush handle. The included angle between the second load surface and the length direction of the electric toothbrush handle is greater than 0.5° and less than 2°. The electric toothbrush handle further comprises an alarm unit, the alarm unit is electrically connected with the motor body, and the alarm unit alarms when the output shaft abuts against the second load surface. One end of the support close to the output shaft is provided with a clamping groove, and the load component is embedded in the clamping groove along the length direction of the electric toothbrush handle. One end of the support close to the output shaft is provided with a flexible sealing cover, the flexible sealing cover seals the clamping groove, and the output shaft penetrates through the flexible sealing cover. The electric toothbrush handle comprises a support, a motor assembly and a load component. The motor assembly comprises a motor body and an elastic member, the motor body is arranged on the support, the motor body has an output shaft, and the elastic member is connected with the motor body. The load component is arranged on the support, and the load component has a first load surface. When the output shaft is not affected by other external forces, the output shaft is driven by the elastic member to abut against the first load surface, and the first load surface limits the movement of the output shaft when abutting against the output shaft. When the toothbrush head is located in the oral cavity and abuts against the tooth surface, the reaction force from the tooth, which is borne by the toothbrush head, is transmitted to the output shaft, so that the output shaft is separated from the first load surface. The included angle between the first load surface and the length direction of the electric toothbrush handle is not greater than 0.5°. The load component has a second load surface, the second load surface is located on the side of the output shaft away from the first load surface, and the second load surface limits the movement of the output shaft when abutting against the output shaft. The first load surface and the second load surface are both arranged obliquely relative to the length direction of the electric toothbrush handle. The included angle between the first load surface and the length direction of the electric toothbrush handle is smaller than the included angle between the second load surface and the length direction of the electric toothbrush handle. The included angle between the second load surface and the length direction of the electric toothbrush handle is greater than 0.5° and less than 2°. The electric toothbrush handle further comprises an alarm unit, the alarm unit is electrically connected with the motor body, and the alarm unit alarms when the output shaft abuts against the second load surface. One end of the support close to the output shaft is provided with a clamping groove, and the load component is embedded in the clamping groove along the length direction of the electric toothbrush handle. One end of the support close to the output shaft is provided with a flexible sealing cover, the flexible sealing cover seals the clamping groove, and the output shaft penetrates through the flexible sealing cover. The electric toothbrush handle comprises a support, a motor assembly and a load component. The motor assembly comprises a motor body and an elastic member, the motor body is arranged on the support, the motor body has an output shaft, and the elastic member is connected with the motor body. The load component is arranged on the support, and the load component has a first load surface. When the output shaft is not affected by other external forces, the output shaft is driven by the elastic member to abut against the first load surface, and the first load surface limits the movement of the output shaft when abutting against the output shaft. When the toothbrush head is located in the oral cavity and abuts against the tooth surface, the reaction force from the tooth, which is borne by the toothbrush head, is transmitted to the output shaft, so that the output shaft is separated from the first load surface. The included angle between the first load surface and the length direction of the electric toothbrush handle is not greater than 0.5°. The load component has a second load surface, the second load surface is located on the side of the output shaft away from the first load surface, and the second load surface limits the movement of the output shaft when abutting against the output shaft. The first load surface and the second load surface are both arranged obliquely relative to the length direction of the electric toothbrush handle. The included angle between the first load surface and the length direction of the electric toothbrush handle is smaller than the included angle between the second load surface and the length direction of the electric toothbrush handle. The included angle between the second load surface and the length direction of the electric toothbrush handle is greater than 0.5° and less than 2°. The electric toothbrush handle further comprises an alarm unit, the alarm unit is electrically connected with the motor body, and the alarm unit alarms when the output shaft abuts against the second load surface. One end of the support close to the output shaft is provided with a clamping groove, and the load component is embedded in the clamping groove along the length direction of the electric toothbrush handle. One end of the support close to the output shaft is provided with a flexible sealing cover, the flexible sealing cover seals the clamping groove, and the output shaft penetrates through the flexible sealing cover. The electric toothbrush handle comprises a support, a motor assembly and a load component. The motor assembly comprises a motor body and an elastic member, the motor body is arranged on the support, the motor body has an output shaft, and the elastic member is connected with the motor body. The load component is arranged on the support, and the load component has a first load surface. When the output shaft is not affected by other external forces, the output shaft is driven by the elastic member to abut against the first load surface, and the first load surface limits the movement of the output shaft when abutting against the output shaft. When the toothbrush head is located in the oral

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