Electric toothbrush

Abstract

The application relates to the technical field of household appliances, and provides an electric toothbrush. The electric toothbrush comprises a shell, a toothbrush head provided with a brush part, a motor assembly installed in the shell, a toothbrush head connecting part connected with the motor assembly, a pressure detection part arranged on the motor assembly, a connecting assembly connected with the motor assembly and the shell, and the motor assembly is adapted to rotate relative to the shell, wherein the connecting assembly is close to the toothbrush head relative to the pressure detection part, a power arm is formed between the brush part and the connecting assembly, a resistance arm is formed between the pressure detection part and the connecting assembly, and the length of the power arm is greater than the length of the resistance arm. According to the electric toothbrush, the pressure borne by the toothbrush head is amplified, the change of the pressure borne by the electric toothbrush can be more accurately detected, and the sensitivity of the electric toothbrush is improved.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and more particularly to electric toothbrushes. Background Technology

[0002] Electric toothbrushes often cause toothpaste or toothpaste foam to splatter due to the large instantaneous inertia when they start working. Currently, anti-splatter electric toothbrushes are available on the market. These toothbrushes detect the toothbrush's condition to determine if it is under pressure. Only when pressure is detected does the motor start running, thus solving the problem of toothpaste or toothpaste foam splattering.

[0003] Most anti-splash electric toothbrushes in related technologies directly detect their own state parameters, making it difficult to accurately determine whether the electric toothbrush is under force. Summary of the Invention

[0004] This application aims to address at least one of the technical problems existing in the related art. To this end, this application proposes an electric toothbrush that amplifies the pressure received by the toothbrush head, enabling more accurate detection of pressure changes and improving the sensitivity of the electric toothbrush.

[0005] The electric toothbrush according to an embodiment of this application includes:

[0006] case;

[0007] Toothbrush head, the toothbrush head is equipped with a bristle brush section;

[0008] A motor assembly is installed inside the housing, the toothbrush head is connected to the motor assembly, and a pressure detection unit is provided on the motor assembly;

[0009] A connecting assembly connects the motor assembly and the housing, such that the motor assembly is adapted to rotate relative to the housing, wherein the connecting assembly is close to the toothbrush head relative to the pressure sensing part, a power arm is formed between the brush part and the connecting assembly, and a resistance arm is formed between the pressure sensing part and the connecting assembly, the length of the power arm being greater than the length of the resistance arm.

[0010] According to the embodiments of this application, the electric toothbrush uses the connecting component as the fulcrum for the rotation of the motor component, and makes the distance from the connecting component to the brush head bristles greater than the distance from the connecting component to the pressure detection part. This results in the length of the power arm being greater than the length of the resistance arm, thereby amplifying the pressure on the toothbrush head. The amplified pressure is then detected, avoiding detection errors caused by insufficient pressure on the toothbrush head. This improves the accuracy of pressure detection in the electric toothbrush, allowing for more precise detection of changes in pressure on the electric toothbrush, making the electric toothbrush more sensitive.

[0011] According to one embodiment of this application, the connecting assembly includes at least two rotating members, which are respectively disposed on both sides of the pressure detection unit.

[0012] According to one embodiment of this application, the rotating component includes a bearing and a fixed column that cooperate with each other, one of the bearing and the fixed column being disposed on the motor assembly, and the other of the bearing and the fixed column being disposed on the housing.

[0013] According to one embodiment of this application, the housing is provided with an assembly groove that matches the bearing, and the bearing is fixed in the assembly groove.

[0014] According to one embodiment of this application, the electric toothbrush includes:

[0015] A first pressure sensing component is disposed inside the housing, and the first pressure sensing component is used to detect whether there is pressure at the pressure detection part;

[0016] And / or,

[0017] A second pressure sensing component is disposed inside the housing, and the second pressure sensing component is used to detect the pressure on the motor assembly.

[0018] According to one embodiment of this application, the first pressure sensing component and the second pressure sensing component are respectively disposed on both sides of the connecting component, and the second pressure sensing component is closer to the toothbrush head than the first pressure sensing component.

[0019] According to one embodiment of this application, the first pressure sensing component includes:

[0020] The first conductive element has its first end installed at the pressure detection unit, so that the first conductive element can rotate as the motor assembly rotates;

[0021] A second conductive element is installed inside the housing. A gap is provided between the second end of the first conductive element and the second conductive element. The second conductive element is located on the rotation path of the second end of the first conductive element.

[0022] A control circuit board is installed inside the housing, and the first conductive element and the second conductive element are electrically connected to the control circuit board respectively.

[0023] According to one embodiment of this application, the first conductive element includes a metal conductive spring sheet, which is installed at the pressure detection unit. The metal conductive spring sheet is provided with at least two spring feet, and the distance between each spring foot and the second conductive element is different.

[0024] According to one embodiment of this application, the metal conductive spring is provided with two spring feet, one of the spring feet including a first connecting segment, a second connecting segment and a third connecting segment, the first connecting segment connecting the metal conductive spring and the second connecting segment, the second connecting segment being inclinedly disposed between the first connecting segment and the third connecting segment, and the third connecting segment being closer to the second conductive element than the other spring foot.

[0025] According to one embodiment of this application, the distance between the third connecting segment and the second conductive element is a, and the distance between the other spring foot and the second conductive element is b, where 0.1mm≤ba≤0.2mm.

[0026] According to one embodiment of this application, the second pressure sensing component includes a pressure sensing element, wherein...

[0027] The pressure sensing element is located between the pressure detection unit and the housing, and / or,

[0028] The pressure sensing element and the pressure detection part are located on both sides of the motor assembly, the pressure sensing element is located between the motor assembly and the housing, and the pressure sensing element is closer to the toothbrush head than the pressure detection part.

[0029] According to one embodiment of this application, the electric toothbrush includes an elastic element connected to a first end of the motor assembly remote from the toothbrush head.

[0030] According to one embodiment of this application, the motor assembly includes a motor, the motor is installed inside the housing, the motor shaft of the motor is connected to the toothbrush head, and a waterproof and dustproof ring is provided on the motor shaft.

[0031] According to one embodiment of this application, the electric toothbrush includes a battery module and a charging coil, both of which are installed inside the housing, and are electrically connected to the control circuit board.

[0032] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of the electric toothbrush provided in the embodiments of this application;

[0035] Figure 2 This is one of the cross-sectional views of the electric toothbrush provided in the embodiments of this application;

[0036] Figure 3 This is a partial structural schematic diagram of the electric toothbrush provided in the embodiments of this application;

[0037] Figure 4 This is a second cross-sectional view of the electric toothbrush provided in the embodiments of this application;

[0038] Figure 5 This is provided by the embodiments of this application. Figure 4 A magnified schematic diagram of a local structure;

[0039] Figure 6 This is the third cross-sectional view of the electric toothbrush provided in the embodiments of this application;

[0040] Figure 7 This is an exploded view of the structure of the electric toothbrush provided in the embodiments of this application;

[0041] Figure 8 This is a schematic diagram of the structure of the first conductive connector and the second conductive connector of the electric toothbrush provided in the embodiments of this application;

[0042] Figure 9 This is provided by the embodiments of this application. Figure 8 A magnified schematic diagram of a local structure;

[0043] Figure 10 This is a schematic diagram of the structure of the first conductive component of the electric toothbrush provided in the embodiments of this application;

[0044] Figure 11 This is a cross-sectional view of an electric toothbrush provided in an embodiment of this application, which is equipped with a pressure sensing element;

[0045] Figure 12 This is an exploded view of the structure of an electric toothbrush with a pressure sensing element provided in the embodiments of this application;

[0046] Figure label:

[0047] 1. Housing; 2. Toothbrush head; 3. Motor assembly; 4. Connecting assembly; 5. First pressure sensing assembly;

[0048] 6. Elastic component; 7. Battery module; 8. Charging coil; 21. Brush section; 31. Pressure detection section;

[0049] 32. Motor; 33. Waterproof and dustproof ring; 41. Rotating component; 42. Bearing; 43. Fixed column;

[0050] 44. Assembly slot; 51. First conductive component; 52. Second conductive component; 53. Control circuit board;

[0051] 54. Pressure sensing element; 61. Groove; 511. Metal conductive spring; 512. Spring foot;

[0052] 513. First connecting section; 514. Second connecting section; 515. Third connecting section; L1. Power arm;

[0053] L2, resistance arm. Detailed Implementation

[0054] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but should not be used to limit the scope of this application.

[0055] In the description of the embodiments of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0056] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0057] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0058] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0059] The following is combined Figures 1 to 12 This application describes the electric toothbrush.

[0060] According to embodiments of this application, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the electric toothbrush includes a housing 1, a toothbrush head 2, a motor assembly 3, and a connecting assembly 4. The toothbrush head 2 is provided with a brush part 21. The motor assembly 3 is installed inside the housing 1 and connected to the toothbrush head 2. The motor assembly 3 is provided with a pressure detection part 31. The connecting assembly 4 connects the motor assembly 3 and the housing 1, so that the motor assembly 3 is adapted to rotate relative to the housing 1. The connecting assembly 4 is close to the toothbrush head 2 relative to the pressure detection part 31. A power arm L1 is formed between the brush part 21 and the connecting assembly 4, and a resistance arm L2 is formed between the pressure detection part 31 and the connecting assembly 4. The length of the power arm L1 is greater than the length of the resistance arm L2.

[0061] When in use, the user inserts the toothbrush head 2 into their mouth. When the toothbrush head 2 contacts the teeth, the teeth exert pressure on the toothbrush head 2. Since the toothbrush head 2 is connected to the motor assembly 3, when the toothbrush head 2 is displaced under pressure, the motor assembly 3 will rotate around the connecting component 4 as the fulcrum. At this time, the distance between the connecting component 4 and the brush head 21 is the effort arm L1 in the lever, and the distance between the connecting component 4 and the pressure detection unit 31 is the resistance arm L2 in the lever. The pressure on the toothbrush head 2 is the effort in the lever. Therefore, according to the lever principle, when the distance from the fulcrum to the brush head 21 is greater than the distance from the fulcrum to the pressure detection unit 31, the pressure at the pressure detection unit 31 will be greater than the pressure on the toothbrush head 2, thus amplifying the pressure on the toothbrush head 2. Then, by detecting the pressure at the pressure detection unit 31, the changes in pressure on the electric toothbrush can be detected more accurately, improving the sensitivity of the electric toothbrush.

[0062] The electric toothbrush of this embodiment uses the connecting component 4 as the fulcrum for the rotation of the motor component 3, and makes the distance from the connecting component 4 to the brush head 21 greater than the distance from the connecting component 4 to the pressure detection part 31. This results in the length of the power arm L1 being greater than the length of the resistance arm L2, thereby amplifying the pressure on the toothbrush head 2. The amplified pressure is then detected, avoiding detection errors caused by low pressure on the toothbrush head 2. This improves the accuracy of pressure detection in the electric toothbrush and allows for more precise detection of changes in pressure on the electric toothbrush, making the electric toothbrush more sensitive.

[0063] Specifically, the toothbrush head 2 includes a first end and a second end that are arranged opposite to each other. The first end of the toothbrush head 2 is connected to the motor assembly 3, and the second end of the toothbrush head 2 is provided with a brush part 21.

[0064] The length of the power arm L1 is the distance from the center point of the brush section 21 to the connecting component, and the length of the resistance arm L2 is the distance from the center point of the pressure detection section to the connecting component.

[0065] The side wall of the motor assembly 3 with the pressure detection part 31 is the first side wall, and the side wall connected to the motor assembly 3 and the connecting assembly 4 is the second side wall. The first side wall and the second side wall are two adjacent side walls.

[0066] It should be noted that the pressure detection unit 31 is located, for example, at the first end of the motor assembly 3 furthest from the toothbrush head 2, and the connecting component 4 is connected to the first end of the motor assembly 3 closest to the toothbrush head 2. However, it should be understood that the pressure detection unit 31 and the connecting component 4 can be located at any suitable position on the motor assembly 3, such that the distance from the pressure detection unit 31 to the fulcrum is less than the distance from the fulcrum to the first end of the toothbrush head 2.

[0067] In one embodiment of this application, such as Figure 4 , Figure 5 and Figure 6 As shown, the connecting component 4 includes a rotating member 41, which is disposed between the motor assembly 3 and the housing 1, allowing the motor assembly 3 to rotate relative to the housing 1. In use, the first end of the rotating member 41 is connected to the housing 1, and the second end of the rotating member 41 is connected to the motor assembly 3. The first and second ends of the rotating member 41 can rotate relative to each other, allowing the motor assembly 3 to rotate around the rotating member 41 as a fulcrum. This lever structure, composed of the toothbrush head 2, the motor assembly 3, and the rotating member 41, amplifies the pressure on the toothbrush head 2.

[0068] In the embodiments of this application, such as Figure 4 , Figure 5 and Figure 6As shown, the connecting assembly 4 includes at least two rotating parts 41, which are respectively disposed on both sides of the pressure detection unit 31. In use, by distributing the rotating parts 41 on both sides of the pressure detection unit 31, both sides of the motor assembly 3 are connected to the housing 1 via the rotating parts 41. This allows both sides of the motor assembly 3 to rotate simultaneously, ensuring synchronized rotation and stable rotation, preventing any deviation of the motor assembly 3 from affecting pressure detection.

[0069] In one embodiment of this application, such as Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the rotating component 41 includes a bearing 42 and a fixed column 43 that cooperate with each other. One of the bearing 42 and the fixed column 43 is disposed on the motor assembly 3, and the other of the bearing 42 and the fixed column 43 is disposed between the motor assembly 3 and the housing 1. In use, the bearing 42 and the fixed column 43 are respectively installed on the housing 1 and the motor assembly 3, and the bearing 42 is connected to the fixed column 43, so that the fixed column 43 and the bearing 42 can rotate relative to each other, thereby allowing the motor assembly 3 to rotate around the rotating component 41 as a fulcrum.

[0070] In embodiments of this application, the bearing 42 is mounted on the housing 1, for example, and the fixing post 43 is mounted on the motor assembly 3, for example, so that the motor assembly 3 can rotate with the bearing 42 as a fulcrum. However, it should be understood that the bearing 42 and the fixing post 43 can also be mounted in any other suitable location.

[0071] Specifically, such as Figure 4 , Figure 5 and Figure 6 As shown, the housing 1 has a mounting groove 44 that matches the bearing 42, and the bearing 42 is fixed in the mounting groove 44. In use, the bearing 42 is installed in the mounting groove 44, so that the bearing 42 can stably act as a lever fulcrum.

[0072] In one embodiment of this application, the connecting component 4 includes a support rod. The first end of the support rod is connected to the housing 1, and the second end of the support rod is connected to the motor assembly 3. The connection point between the support rod and the motor assembly 3 is positioned opposite to the pressure detection unit 31. During use, when the toothbrush head 2 is subjected to pressure, the toothbrush head 2 drives the motor assembly 3 to rotate around the connection point between the support rod and the motor assembly 3. The distance from the pressure detection unit 31 to the support rod is less than the distance from the support rod to the second end of the toothbrush head 2, thereby amplifying the pressure on the toothbrush head 2 through the lever structure formed by the toothbrush head 2, the motor assembly 3, and the support rod.

[0073] In one embodiment of this application, such as Figure 2 , Figure 3, Figure 11 and Figure 12 As shown, the electric toothbrush includes a first pressure sensing component 5, which is disposed inside the housing 1. The first pressure sensing component 5 is used to detect whether there is pressure at the pressure detection unit 31. In use, when the user turns on the electric toothbrush, the amplitude of the electric toothbrush head 2 is relatively small, preventing splashing. When the user inserts the toothbrush head 2 into their mouth, the teeth exert pressure on the toothbrush head 2, causing the toothbrush head 2 to rotate the motor assembly 3. The first pressure sensing component 5 detects pressure at the pressure detection unit 31 and transmits the detection result to the control component inside the housing 1. The control component then controls the motor assembly 3 to increase its amplitude, thereby increasing the amplitude of the toothbrush head 2. Since the toothbrush head 2 is still inside the user's mouth, splashing is prevented. This achieves the anti-splash function of the electric toothbrush by real-time detection of pressure on the toothbrush head 2 through the first pressure sensing component 5, controlling the electric toothbrush to increase its amplitude only when pressure is applied to the toothbrush head 2.

[0074] In one embodiment of this application, the electric toothbrush includes a second pressure sensing component disposed within the housing 1. The second pressure sensing component is used to detect the pressure on the motor assembly 3. During use, the second pressure sensing component can detect the pressure on the motor assembly 3 in real time and transmit the detected data to a control component within the housing 1. When the second pressure sensing component detects pressure on the motor assembly 3, it indicates that the motor assembly 3 is under pressure, i.e., the toothbrush head 2 is under pressure, signifying that the user has begun using the toothbrush. This allows the control component to increase the amplitude of the motor assembly 3. Furthermore, the second pressure sensing component can also detect whether the pressure on the motor assembly 3 changes continuously. When the second pressure sensing component detects that the pressure on the motor assembly 3 remains constant, it indicates that the toothpaste is exerting pressure on the toothbrush head 2, causing the motor assembly 3 to be subjected to pressure. In other words, the user has not yet started using the electric toothbrush, so the motor assembly 3 remains in a low-amplitude state. When the second pressure sensing component detects that the pressure on the motor assembly 3 changes continuously, it indicates that the user has started using the electric toothbrush, which causes the pressure on the toothbrush head 2 to change, and thus the pressure on the motor assembly 3 changes accordingly. At this time, the motor assembly 3 can be controlled to increase its amplitude, thereby achieving the anti-splash function of the electric toothbrush.

[0075] In one embodiment of this application, a first pressure sensing component 5 and a second pressure sensing component may be simultaneously provided inside the housing 1. Through the dual detection of the first pressure sensing component 5 and the second pressure sensing component, the pressure on the electric toothbrush can be detected more accurately, thereby improving the sensitivity of the electric toothbrush.

[0076] The first pressure sensing component 5 and the second pressure sensing component can be located on the same side, or the first pressure sensing component 5 and the second pressure sensing component can be located on opposite sides of the motor component 3.

[0077] Specifically, the first pressure sensing component 5 and the second pressure sensing component are respectively disposed on both sides of the connecting component 4, with the second pressure sensing component closer to the toothbrush head 2 than the first pressure sensing component 5. In use, the first and second pressure sensing components are arranged diagonally opposite each other within the housing 1, so that both are located on the rotation path of the motor component 3. This allows the first and second pressure sensing components to directly detect the pressure applied to the motor component 3 when it rotates under pressure.

[0078] In one embodiment of this application, such as Figure 2 , Figure 3 and Figure 7 As shown, the first pressure sensing component 5 includes a first conductive element 51, a second conductive element 52, and a control circuit board 53. The first end of the first conductive element 51 is installed at the pressure detection unit 31, so that the first conductive element 51 can rotate with the rotation of the motor component 3. The second conductive element 52 is installed inside the housing 1, and a gap is provided between the second end of the first conductive element 51 and the second conductive element 52. The second conductive element 52 is located on the rotation path of the second end of the first conductive element 51. The control circuit board 53 is installed inside the housing 1, and the first conductive element 51 and the second conductive element 52 are electrically connected to the control circuit board 53 respectively.

[0079] When the toothbrush head 2 is subjected to pressure, the motor assembly 3 rotates around the connecting assembly 4. This rotation causes the pressure detection unit 31 to rotate, resulting in the first conductive element 51 rotating as well. The second conductive element 52 is located on the rotation path of the first conductive element 51. As the first conductive element 51 rotates, it comes into contact with the second conductive element 52, establishing a connection. When the control circuit board 53 detects this connection, it indicates that pressure exists at the pressure detection unit 31, meaning the toothbrush head 2 is under pressure. This signifies that the user has placed the toothbrush head 2 in their mouth. The control circuit board 53 then sends a corresponding signal to the motor assembly 3, increasing its amplitude. This increases the amplitude of the toothbrush head 2, thus cleaning the mouth. In this embodiment, the control circuit board 53 detects the connection between the first conductive element 51 and the second conductive element 52 to determine whether pressure exists at the pressure detection unit 31, thereby determining whether the toothbrush head 2 is under pressure and achieving the anti-splash function of the electric toothbrush.

[0080] In embodiments of this application, the second conductive element 52 is, for example, a conductive needle. However, it should be understood that the second conductive element 52 can also be any other suitable structural component with conductive function.

[0081] In the embodiments of this application, such as Figure 8 , Figure 9 and Figure 10 As shown, the first conductive element 51 includes a metal conductive spring 511, which is installed at the pressure detection unit 31. The metal conductive spring 511 has at least two spring feet 512, and the distance between each spring foot 512 and the second conductive element 52 is different. In use, when the motor assembly 3 rotates, it causes the spring feet 512 on the metal conductive spring 511 to abut against the second conductive element 52, thereby connecting the first conductive element 51 and the second conductive element 52. Because the distance between each spring foot 512 and the second conductive element 52 is different, when the electric toothbrush is subjected to pressure, the spring foot 512 closest to the second conductive element 52 first contacts the second conductive element 52. When the spring foot 512 closest to the second conductive element 52 undergoes fatigue deformation, when the electric toothbrush is subjected to pressure again, the next spring foot 512 closest to the second conductive element 52 contacts the second conductive element 52, and so on. This ensures that the electric toothbrush can maintain normal operation and always has an anti-splash function. When the user stops brushing, because the spring foot 512 has a certain elasticity, the elastic force of the spring foot 512 causes the metal conductive spring piece 511 and the second conductive element 52 to separate, thereby reducing the output amplitude of the motor assembly 3 and the amplitude of the toothbrush head 2. This also helps to prevent splashing when the user removes the toothbrush head 2 from their mouth.

[0082] Specifically, such as Figure 8 , Figure 9 and Figure 10As shown, the metal conductive spring 511 is provided with two spring feet 512. One spring foot 512 includes a first connecting segment 513, a second connecting segment 514, and a third connecting segment 515. The first connecting segment 513 connects the metal conductive spring 511 and the second connecting segment 514. The second connecting segment 514 is inclinedly disposed between the first connecting segment 513 and the third connecting segment 515. The third connecting segment 515 is closer to the second conductive element 52 than the other spring foot 512. In use, the metal conductive spring 511 is provided with two spring feet 512. One spring foot 512 is a long spring foot 512 closer to the second conductive element 52, and the other spring foot 512 is a short spring foot 512 farther away from the second conductive element 52. The long spring foot 512 is composed of a first connecting segment 513, a second connecting segment 514, and a third connecting segment 515 connected in sequence. The second connecting segment 514 has a certain tilt angle, so that the third connecting segment 515 is closer to the second conductive element 52 than the short spring foot 512. When the electric toothbrush is subjected to pressure, the motor assembly 3 rotates, driving the metal conductive spring 511 to move. The third connecting segment 515 first abuts against the second conductive element 52, realizing the connection between the first conductive element 51 and the second conductive element 52. With the use of the electric toothbrush, after the third connecting segment 515 undergoes fatigue deformation, the short spring foot 512 is closer to the second conductive element 52 than the third connecting segment 515. Then, when the electric toothbrush is subjected to pressure later, the short spring foot 512 abuts against the second conductive element 52, making the first conductive element 51 and the second conductive element 52 connected. This ensures a stable connection between the first conductive element 51 and the second conductive element 52, allowing the electric toothbrush to work stably and avoids the failure of the anti-splash function of the electric toothbrush when one of the spring feet 512 undergoes large deformation due to long-term stress.

[0083] In one embodiment of this application, one of the spring feet 512 may be mounted on the side wall of the metal conductive spring piece 511 opposite to the second conductive element 52, and the other spring foot 512 may be connected to the lower surface of the metal conductive spring piece 511 away from the toothbrush head 2. The mounting position of one spring foot 512 is closer to the second conductive element 52 than the other spring foot 512, thus making one spring foot 512 closer to the second conductive element 52 than the other spring foot 512. It should be noted that the mounting positions of one spring foot 512 and the other spring foot 512 can also be any other suitable positions.

[0084] In embodiments of this application, the surface of the first connecting segment 513 is, for example, parallel to the surface of another spring foot 512.

[0085] In embodiments of this application, the included angle between the first connecting segment 513 and the second connecting segment 514 is, for example, any angle between 120° and 150°.

[0086] In the embodiments of this application, the distance between the third connecting segment 515 and the second conductive element 52 is 'a', and the distance between the other spring foot 512 and the second conductive element 52 is 'b', where 0.1mm ≤ 'a' ≤ 0.2mm. During use, this effectively prevents the electric toothbrush from experiencing a reduced product lifespan due to the failure of the anti-splash function, and the small height difference has minimal impact on the sensitivity of the anti-splash function.

[0087] In one embodiment of this application, such as Figure 11 and Figure 12 As shown, the second pressure sensing component 5 includes a pressure sensing element 54, which is located between the pressure detection unit 31 and the housing 1. In use, the pressure sensing element 54 is positioned between the pressure detection unit 31 and the housing 1. The pressure sensing element 54 detects in real time whether there is pressure at the pressure detection unit 31, thereby determining whether the toothbrush head 2 is under pressure. The pressure sensing element 54 then transmits the detected data to the control component inside the housing 1. The control component controls the operation of the motor assembly 32 based on the detection result. When the pressure sensing element 54 does not detect pressure, the control component controls the motor assembly 32 to output a low amplitude, ensuring the toothbrush head 2's amplitude is low and does not splash. When the pressure sensing element 54 detects pressure, the control component controls the motor assembly 3 to output a high amplitude, increasing the amplitude of the toothbrush head 2 and thus cleaning the mouth. This achieves the anti-splash function of the electric toothbrush by detecting in real time whether the toothbrush head 2 is under pressure and controlling the electric toothbrush to increase the amplitude only when the toothbrush head 2 is under pressure.

[0088] Specifically, in this embodiment, the pressure sensing element 54 is, for example, a pressure sensor. However, it should be understood that the pressure sensing element 54 can also be any other suitable element with pressure detection function.

[0089] In one embodiment of this application, such as Figure 11 and Figure 12As shown, the pressure sensing element 54 and the pressure detection unit 31 are located on both sides of the motor assembly 3. The pressure sensing element 54 is located between the motor assembly 3 and the housing 1, and is closer to the toothbrush head 2 than the pressure detection unit 31. During use, when the toothbrush head 2 is subjected to pressure, the motor assembly 3 rotates. The pressure detection unit 31 at the first end of the motor assembly 3 moves towards the housing 1 as the motor assembly 3 rotates, and simultaneously, the second end of the motor assembly 3 also moves towards the housing 1. This causes the motor assembly 3 to squeeze the pressure sensing element 54, allowing the pressure sensing element 54 to detect the pressure on the motor assembly 3, i.e., the pressure on the toothbrush head 2. By determining whether the toothbrush head 2 is under pressure, the operating state of the motor assembly 3 is controlled. When the pressure sensing element 54 does not detect pressure, the control unit controls the motor assembly 3 to output a low amplitude, ensuring the toothbrush head 2 vibrates at a low amplitude to prevent splashing. When the pressure sensing element 54 detects pressure, the control unit controls the motor assembly 3 to output a high amplitude, increasing the amplitude of the toothbrush head 2 and thus cleaning the oral cavity.

[0090] Specifically, in this embodiment, the pressure sensing element 54 is, for example, a gyroscope sensor. However, it should be understood that the pressure sensing element 54 can also be any other suitable sensor, such as an angle sensor, a displacement sensor, or a Hall sensor.

[0091] In one embodiment of this application, the first pressure sensing component 5 includes two pressure sensing elements 54, which are respectively located on both sides of the motor assembly 3. One pressure sensing element 54 is located between the pressure detection section 31 and the housing 1, and the other pressure sensing element 54 is located between the motor assembly 3 and the housing 1, and is closer to the toothbrush head 2 than the pressure detection section 31. In use, by simultaneously providing pressure sensing elements 54 on both sides of the motor assembly 3, pressure can be detected simultaneously on both sides of the motor assembly 3, thereby improving the accuracy of detecting the pressure on the toothbrush head 2.

[0092] In one embodiment of this application, the housing 1 is simultaneously equipped with a pressure sensing element 54, a first conductive element 51, a second conductive element 52, and a control circuit board 53. During use, when the toothbrush head 2 is subjected to pressure, the motor assembly 3 rotates, thereby connecting the first conductive element 51 and the second conductive element 52. Based on this connection, when the pressure sensing element 54 detects a continuous change in pressure, the motor assembly 3 outputs a larger amplitude, increasing the amplitude of the toothbrush head 2 and achieving oral cleaning. This avoids the toothbrush head 2 directly entering a large amplitude state and splashing when the weight of the toothpaste causes the first conductive element 51 and the second conductive element 52 to connect, thus improving the anti-splash effect of the electric toothbrush.

[0093] In this embodiment of the electric toothbrush, the vibration frequency of the toothbrush head 2 only increases when the pressure value detected by the pressure sensing element 54 reaches a first preset range value. When the pressure value detected by the pressure sensing element 54 reaches a second preset range value, the motor assembly 3 switches to a low vibration state, thereby reducing the vibration frequency of the toothbrush head 2. This can remind the user that the brushing pressure is too high, thus protecting the teeth.

[0094] In one embodiment of this application, such as Figure 7 As shown, the electric toothbrush includes an elastic element 6, which is connected to the first end of the motor assembly 3 away from the toothbrush head 2. During use, the elastic element 6 is connected to the motor assembly 3, effectively reducing the vibration of the motor assembly 3 and consequently reducing the vibration of the housing 1, thus achieving a vibration damping effect. Furthermore, when the motor assembly 3 is subjected to pressure and moves, the elastic element 6 is compressed by the motor assembly 3. When the motor assembly 3 is no longer under pressure, the elastic element 6 restores its deformation and simultaneously drives the motor assembly 3 to automatically reset, thereby achieving the automatic reset function of the motor shaft.

[0095] Specifically, such as Figure 7 As shown, the elastic element 6 is provided with a groove 61 that matches the motor assembly 3. In use, the motor assembly 3 is inserted into the groove 61 on the elastic element 6, making the connection between the motor assembly 3 and the elastic element 6 more stable and convenient for disassembly and assembly.

[0096] In one embodiment of this application, such as Figure 2 and Figure 7 As shown, the motor assembly 3 includes a motor 32, which is installed inside the housing 1. The motor shaft of the motor 32 is connected to the toothbrush head 2, and a waterproof and dustproof ring 33 is provided on the motor shaft. During use, the motor 32 drives the motor shaft to rotate, which in turn drives the toothbrush head 2 to rotate, thus enabling the toothbrush head 2 to clean the oral cavity. The waterproof and dustproof ring 33 on the motor shaft effectively prevents water and dust from entering the housing 1 during use, ensuring the normal operation of the motor assembly 3 and other components inside the housing 1.

[0097] In one embodiment of this application, such as Figure 2 , Figure 4 and Figure 7 As shown, the electric toothbrush includes a battery module 7 and a charging coil 8, both of which are installed inside the housing 1. The battery module 7 and the charging coil 8 are electrically connected to the control circuit board 53. During use, the charging coil 8 receives energy from the wireless charging base and converts this energy into electrical energy, which is then transmitted to the control circuit board 53. The control circuit board 53 charges the battery module 7, enabling the electric toothbrush to have wireless charging functionality.

[0098] Finally, it should be noted that the above embodiments are only used to illustrate this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of this application do not depart from the spirit and scope of the technical solutions of this application and should be covered within the scope of the claims of this application.

Claims

1. An electric toothbrush, characterized in that, include: case; Toothbrush head, wherein the toothbrush head is provided with a brush section; A motor assembly is installed inside the housing, the toothbrush head is connected to the motor assembly, and a pressure detection unit is provided on the motor assembly; A connecting assembly connects the motor assembly and the housing, such that the motor assembly is adapted to rotate relative to the housing, wherein the connecting assembly is close to the toothbrush head relative to the pressure sensing part, a power arm is formed between the brush part and the connecting assembly, and a resistance arm is formed between the pressure sensing part and the connecting assembly, the length of the power arm being greater than the length of the resistance arm.

2. The electric toothbrush according to claim 1, characterized in that, The connecting assembly includes at least two rotating members, which are respectively disposed on both sides of the pressure detection unit.

3. The electric toothbrush according to claim 2, characterized in that, The rotating component includes a cooperating bearing and a fixed column, one of which is disposed on the motor assembly, and the other of which is disposed on the housing.

4. The electric toothbrush according to claim 3, characterized in that, The housing is provided with an assembly groove that matches the bearing, and the bearing is fixed in the assembly groove.

5. The electric toothbrush according to any one of claims 1 to 4, characterized in that, The electric toothbrush includes: A first pressure sensing component is disposed inside the housing, and the first pressure sensing component is used to detect whether there is pressure at the pressure detection part; And / or, A second pressure sensing component is disposed inside the housing, and the second pressure sensing component is used to detect the pressure on the motor assembly.

6. The electric toothbrush according to claim 5, characterized in that, The first pressure sensing component and the second pressure sensing component are respectively disposed on both sides of the connecting component, with the second pressure sensing component being closer to the toothbrush head than the first pressure sensing component.

7. The electric toothbrush according to claim 5, characterized in that, The first pressure sensing component includes: The first conductive element has its first end installed at the pressure detection unit, so that the first conductive element can rotate as the motor assembly rotates; A second conductive element is installed inside the housing. A gap is provided between the second end of the first conductive element and the second conductive element. The second conductive element is located on the rotation path of the second end of the first conductive element. A control circuit board is installed inside the housing, and the first conductive element and the second conductive element are electrically connected to the control circuit board respectively.

8. The electric toothbrush according to claim 7, characterized in that, The first conductive element includes a metal conductive spring, which is installed at the pressure detection unit. The metal conductive spring has at least two spring feet, and the distance between each spring foot and the second conductive element is different.

9. The electric toothbrush according to claim 8, characterized in that, The metal conductive spring is provided with two spring feet, one of which includes a first connecting segment, a second connecting segment and a third connecting segment. The first connecting segment connects the metal conductive spring and the second connecting segment. The second connecting segment is inclined between the first connecting segment and the third connecting segment. The third connecting segment is closer to the second conductive element than the other spring foot.

10. The electric toothbrush according to claim 9, characterized in that, The distance between the third connecting segment and the second conductive element is a, and the distance between the other spring foot and the second conductive element is b, where 0.1mm ≤ ba ≤ 0.2mm.

11. The electric toothbrush according to claim 5, characterized in that, The second pressure sensing assembly includes a pressure sensing element, wherein, The pressure sensing element is located between the pressure detection unit and the housing, and / or, The pressure sensing element and the pressure detection part are located on opposite sides of the motor assembly. The pressure sensing element is located between the motor assembly and the housing, and the pressure sensing element is closer to the toothbrush head than the pressure detection part.

12. The electric toothbrush according to any one of claims 1 to 4, characterized in that, The electric toothbrush includes an elastic element connected to a first end of the motor assembly away from the toothbrush head.

13. The electric toothbrush according to any one of claims 1 to 4, characterized in that, The motor assembly includes a motor, which is installed inside the housing. The motor shaft is connected to the toothbrush head, and a waterproof and dustproof ring is provided on the motor shaft.

14. The electric toothbrush according to claim 7, characterized in that, The electric toothbrush includes a battery module and a charging coil, both of which are installed inside the housing and are electrically connected to the control circuit board.

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