Handle of electric toothbrush and electric toothbrush

Abstract

The utility model discloses a handle of an electric toothbrush and the electric toothbrush, the handle of the electric toothbrush comprises a shell, a rotating shaft, a rotation driving assembly and a linear driving assembly, the rotation driving assembly is located in the shell and comprises a first magnetic part and a second magnetic part, the first magnetic part is fixed relative to the shell, and the second magnetic part is fixed relative to the rotating shaft; the first magnetic part and the second magnetic part are oppositely arranged in the radial direction of the rotating shaft and used for driving the rotating shaft to rotate around the central axis of the rotating shaft relative to the shell; the linear driving assembly is used for driving the rotating shaft to move along the central axis of the rotating shaft relative to the shell; the first magnetic part does not exceed the second magnetic part all the time in the central axis direction of the rotating shaft, or the second magnetic part does not exceed the first magnetic part all the time in the central axis direction of the rotating shaft. According to the technical scheme, the resistance of the rotation driving assembly to the linear driving assembly is reduced, and the energy utilization efficiency of the rotation driving assembly and the linear driving assembly is improved.

Description

Technical Field

[0001] This application relates to the technical field of oral cleaning appliances, and particularly to the handle of an electric toothbrush and the electric toothbrush. Background Art

[0002] In the related art, some electric toothbrushes adopt a scheme of superimposing two motors. One motor is responsible for providing rotational motion, and the other is responsible for providing axial translational motion. Such a setting can enhance the cleaning effect by combining two different motion modes, enabling the electric toothbrush to more effectively clean the tooth surface and tooth gaps.

[0003] However, during actual operation, the motor responsible for axial translational motion needs to overcome the additional electromagnetic resistance brought by the motor of rotational motion. This resistance not only reduces the working efficiency of the motor but also may cause problems such as increased motor heating and increased power consumption. Summary of the Utility Model

[0004] The embodiments of this application provide a handle of an electric toothbrush and the electric toothbrush. The handle of the electric toothbrush can reduce the resistance of the linear drive assembly to the rotational drive assembly and improve the energy utilization efficiency of the rotational drive assembly and the linear drive assembly.

[0005] In a first aspect, the embodiments of this application provide a handle of an electric toothbrush, including: a housing; a rotating shaft, one end of which is located inside the housing and the other end passes through the housing and is located outside the housing; a rotational drive assembly located inside the housing, including a first magnetic member and a second magnetic member. The first magnetic member is fixed relative to the housing, and the second magnetic member is fixed relative to the rotating shaft. The first magnetic member and the second magnetic member are arranged opposite to each other along the radial direction of the rotating shaft and are used to drive the rotating shaft to rotate relative to the housing around the central axis of the rotating shaft; a linear drive assembly located inside the housing and distributed along the central axis direction of the rotating shaft. The linear drive assembly is connected to the housing and the rotating shaft and is used to drive the rotating shaft to move relative to the housing along the central axis direction of the rotating shaft; wherein, the handle is configured such that: along the central axis direction of the rotating shaft, the first magnetic member never exceeds the second magnetic member, or, along the central axis direction of the rotating shaft, the second magnetic member never exceeds the first magnetic member.

[0006] In some of these embodiments, the second magnetic member has an initial position, a first return position, and a second return position along the central axis direction of the rotating shaft. Along the central axis direction of the rotating shaft, the second magnetic member at the initial position is located between the second magnetic member at the first return position and the second magnetic member at the second return position.

[0007] In some of these embodiments, along the central axis direction of the rotating shaft, the distance between the second magnetic member in the initial position and the second magnetic member in the first folded-back position is H1, and along the central axis direction of the rotating shaft, the distance between the second magnetic member in the initial position and the second magnetic member in the second folded-back position is H2; the handle is configured such that: H1 = H2.

[0008] In some of these embodiments, along the central axis direction of the rotating shaft, the moving stroke between the second magnetic members is X1, the length of the first magnetic member along the central axis of the rotating shaft is Y1, and the length of the second magnetic member along the central axis direction of the rotating shaft is Y2. The handle is configured such that: along the central axis direction of the rotating shaft, the first magnetic member never extends beyond the second magnetic member and Y2 - Y1 > X1; or, the handle is configured such that: along the central axis direction of the rotating shaft, the second magnetic member never extends beyond the first magnetic member and Y1 - Y2 > X1.

[0009] In some of these embodiments, along the central axis direction of the rotating shaft, the moving stroke of the second magnetic member is X1, the length of the first magnetic member along the central axis of the rotating shaft is Y1, and the length of the second magnetic member along the central axis direction of the rotating shaft is Y2. The handle is configured such that: X1 + 0.3 mm ≤ |Y1 - Y2| ≤ X1 + 3 mm.

[0010] In some of these embodiments, the second magnetic member has an initial position along the central axis direction of the rotating shaft. In the initial position, along the central axis direction of the rotating shaft, the distance between the midpoint of the first magnetic member along the central axis direction of the rotating shaft and the midpoint of the second magnetic member along the central axis direction of the rotating shaft is X2. The handle is configured such that: 0 mm ≤ X2 < 1 mm.

[0011] In some of these embodiments, the handle of the electric toothbrush further includes: a reset button; and a control component, electrically connected to both the reset button and the linear drive component, for controlling the linear drive component to drive the second magnetic member to move to the initial position when the reset button is triggered.

[0012] In some of these embodiments, the first magnetic member is an electromagnetic coil and the second magnetic member is a permanent magnet.

[0013] In some of these embodiments, the linear drive component includes a third magnetic member and a fourth magnetic member. The third magnetic member is fixed relative to the housing, the fourth magnetic member is fixed relative to the rotating shaft, and the third magnetic member and the fourth magnetic member are arranged opposite to each other along the radial direction of the rotating shaft.

[0014] In some of these embodiments, the third magnetic member is an electromagnetic coil and the fourth magnetic member is a permanent magnet.

[0015] In some of these embodiments, the handle of the electric toothbrush further includes: two bearings, which are located inside the housing and sleeved on the rotating shaft, and along the central axis direction of the rotating shaft, one of the bearings is located on the side of the rotational driving assembly away from the linear driving assembly, and the other bearing is located on the side of the linear driving assembly away from the rotational driving assembly.

[0016] In some of these embodiments, the handle of the electric toothbrush further includes: a pressure sensor, which is located outside the housing and connected to the rotating shaft, and the pressure sensor is used to detect the deformation amount of the rotating shaft.

[0017] In some of these embodiments, along the central axis direction of the rotating shaft, the moving stroke of the second magnetic member is X1, and the distance between the pressure sensor and the housing is X2. The handle is configured such that: X1 < X2.

[0018] In some of these embodiments, one of the rotating shaft and the housing is provided with two limiting surfaces, which are spaced apart along the central axis direction of the rotating shaft, and the other of the rotating shaft and the housing is provided with a limiting protrusion, and the limiting protrusion is located between the two limiting surfaces along the central axis direction of the rotating shaft, and the limiting protrusion is used to move between the two limiting surfaces driven by the rotational driving assembly.

[0019] In some of these embodiments, the central angle clamped by the two limiting surfaces is α, and the handle is configured such that: 3° ≤ α ≤ 50°.

[0020] In a second aspect, an embodiment of the present application provides an electric toothbrush, and the electric toothbrush includes the handle of the above-mentioned electric toothbrush.

[0021] Based on the handle of the electric toothbrush and the electric toothbrush according to the embodiments of the present application, the handle includes a housing, a rotating shaft, a rotational driving assembly, and a linear driving assembly. With such a setting, it can be ensured that when the linear driving assembly and the rotational driving assembly operate simultaneously, the relative positions between the first magnetic member and the second magnetic member always remain within a certain effective range of action, thereby ensuring that the magnetic interaction force between the two is continuous and stable, and preventing the weakening of the magnetic force due to excessive change in the relative positions between the first magnetic member and the second magnetic member, thus ensuring the energy utilization efficiency of the rotational driving assembly.

[0022] Correspondingly, since one of the first magnetic member and the second magnetic member will never exceed the other, the magnetic pulling force generated between the first magnetic member and the second magnetic member that hinders the relative movement of the first magnetic member and the second magnetic member is small, so the influence on the linear driving assembly is small, ensuring the operating efficiency of the linear driving assembly and ensuring that the rotational driving assembly and the linear driving assembly can work effectively in coordination. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 Schematic perspective view of the handle of an electric toothbrush in an embodiment of the present application;

[0025] Figure 2 Front view of an electric toothbrush in an embodiment of the present application;

[0026] Figure 3 For Figure 2 Schematic cross-sectional view at position D in

[0027] Figure 4 For Figure 1 Schematic perspective view of a partial structure of the handle of the electric toothbrush in

[0028] Figure 5 For Figure 4 Schematic cross-sectional views of the second magnetic member at the initial position, the first return position, and the second return position in

[0029] Figure 6 For Figure 4 Schematic cross-sectional view of the second magnetic member moving between the first return position and the second return position in

[0030] Reference numerals in the drawings:

[0031] 100. Handle;

[0032] 1. Housing;

[0033] 2. Rotating shaft; 21. Central axis;

[0034] 3. Rotating drive assembly; 31. First magnetic member; 32. Second magnetic member;

[0035] 4. Linear drive assembly; 41. Third magnetic member; 42. Fourth magnetic member;

[0036] A. Initial position; B. First return position; C. Second return position. Detailed implementation manners

[0037] In order to make the objectives, technical solutions, and advantages of the present application clearer and more understandable, the following further details the present application in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0038] The inventors found that in some electric toothbrushes in the related art, a scheme of superimposing two motors is adopted. One motor is responsible for providing a rotational motion, and the other is responsible for providing an axial translational motion. Such an arrangement can enhance the cleaning effect by combining two different motion modes, enabling the electric toothbrush to more effectively clean the tooth surface and tooth gaps.

[0039] However, during actual operation, the motor responsible for the axial translational motion needs to overcome the additional electromagnetic resistance brought by the motor of the rotational motion. This resistance not only reduces the working efficiency of the motor but may also cause problems such as increased motor heating and increased power consumption.

[0040] Please refer to Figures 1 to 3 , to solve the above technical problems, an embodiment of the present application provides a handle 100 of an electric toothbrush, including: a housing 1; a rotating shaft 2, one end of which is located inside the housing 1 and the other end passes through the housing 1 and is located outside the housing 1; a rotational drive assembly 3, located inside the housing 1, including a first magnetic member 31 and a second magnetic member 32. The first magnetic member 31 is fixed relative to the housing 1, and the second magnetic member 32 is fixed relative to the rotating shaft 2. The first magnetic member 31 and the second magnetic member 32 are arranged opposite to each other along the radial direction of the rotating shaft 2 for driving the rotating shaft 2 to rotate relative to the housing 1 around the central axis 21 of the rotating shaft 2; a linear drive assembly 4, located inside the housing 1 and distributed along the central axis 21 direction of the rotating shaft 2. The linear drive assembly 4 is connected to the housing 1 and the rotating shaft 2 for driving the rotating shaft 2 to move relative to the housing 1 along the central axis 21 direction of the rotating shaft 2; wherein, the handle 100 is configured such that: along the central axis 21 direction of the rotating shaft 2, the first magnetic member 31 never extends beyond the second magnetic member 32, or, along the central axis 21 direction of the rotating shaft 2, the second magnetic member 32 never extends beyond the first magnetic member 31.

[0041] The inventors found that in the related art, the sizes of the first magnetic member 31 and the second magnetic member 32 in the axial direction of the central axis 21 in some electric toothbrushes are equal. When the linear drive assembly 4 drives the second magnetic member 32 to move along the central axis 21 direction, the first magnetic member 31 and the second magnetic member 32 will be misaligned. At this time, the rotational drive assembly 3 will generate a magnetic pulling force opposite to the relative motion direction of the first magnetic member 31 and the second magnetic member 32. The above magnetic pulling force is used to drive the second magnetic member 32 and the first magnetic member 31 to be centered and aligned, and the direction of this magnetic pulling force is opposite to the driving force direction of the linear drive assembly 4, resulting in a decrease in the energy utilization rate of the linear drive assembly 4. For the rotational drive assembly 3, due to the misalignment between the first magnetic member 31 and the second magnetic member 32, the overlapping area of the two will also be reduced, thereby leading to a weakening of the magnetic interaction force between the first magnetic member 31 and the second magnetic member 32, affecting the normal operation of the rotational drive assembly 3.

[0042] In view of this, for the handle 100 of the electric toothbrush and the electric toothbrush according to the embodiments of the present application, the handle 100 includes a housing 1, a rotating shaft 2, a rotation driving assembly 3 and a linear driving assembly 4. Along the direction of the central axis 21 of the rotating shaft 2, the first magnetic member 31 never exceeds the second magnetic member 32, or along the direction of the central axis 21 of the rotating shaft 2, the second magnetic member 32 never exceeds the first magnetic member 31. With such a setting, it can be ensured that when the linear driving assembly 4 and the rotation driving assembly 3 operate simultaneously, the relative positions between the first magnetic member 31 and the second magnetic member 32 always remain within a certain effective range of action, and the magnetic pulling force generated by the rotation driving assembly 3 is small or even almost zero, thereby ensuring that the magnetic interaction force between the first magnetic member 31 and the second magnetic member 32 can be continuous and stable, and preventing the magnetic acting force for driving rotation from weakening due to excessive change in the relative positions between the first magnetic member 31 and the second magnetic member 32, thus ensuring high energy utilization efficiency of the rotation driving assembly 3.

[0043] Correspondingly, please follow Figure 4 , since one of the first magnetic member 31 and the second magnetic member 32 never exceeds the other, the magnetic pulling force that hinders the relative movement between the first magnetic member 31 and the second magnetic member 32 is small, and the resistance to the linear driving assembly 4 along the driving direction is small, which will not affect the normal operation of the linear driving assembly 4, ensuring the operation efficiency of the linear driving assembly 4, and enabling the rotation driving assembly 3 and the linear driving assembly 4 to work effectively in coordination.

[0044] It can be understood that, please refer to Figures 4 to 5 , to achieve that along the direction of the central axis 21 of the rotating shaft 2, the first magnetic member 31 never exceeds the second magnetic member 32, or along the direction of the central axis 21 of the rotating shaft 2, the second magnetic member 32 never exceeds the first magnetic member 31, it can be designed that along the direction of the central axis 21 of the rotating shaft 2, the absolute value of the difference between the length Y1 of the first magnetic member 31 and the length Y2 of the second magnetic member 32 is greater than the moving stroke X1 of the second magnetic member 32, that is, |Y1 - Y2| > X1. Further, to reduce the influence of assembly errors, the handle 100 is configured such that: X1 + 0.3 mm ≤ |Y1 - Y2| ≤ X1 + 3 mm.

[0045] Specifically, if along the direction of the central axis 21 of the rotating shaft 2, the first magnetic member 31 never exceeds the second magnetic member 32, then along the direction of the central axis 21 of the rotating shaft 2, the length of the first magnetic member 31 is less than that of the second magnetic member 32. It can be designed that along the direction of the central axis 21 of the rotating shaft 2, the difference between the length Y2 of the second magnetic member 32 and the length Y1 of the first magnetic member 31 is greater than the moving stroke X1 of the second magnetic member 32, that is, the above |Y1 - Y2| > X1 corresponds to Y2 - Y1 > X1. Further, X1 + 0.3 mm ≤ Y2 - Y1 ≤ X1 + 3 mm.

[0046] Specifically, if the second magnetic member 32 never extends beyond the first magnetic member 31 along the central axis 21 of the rotating shaft 2, then along the central axis 21 of the rotating shaft 2, the length of the first magnetic member 31 is greater than that of the second magnetic member 32. The difference in length between the first magnetic member 31 with length Y1 and the second magnetic member 32 with length Y2 along the central axis 21 of the rotating shaft 2 can be designed to be greater than the moving stroke X1 of the second magnetic member 32. That is, |Y1 - Y2| > X1, corresponding to Y1 - Y2 > X1. Further, X1 + 0.3mm ≤ Y1 - Y2 ≤ X1 + 3mm.

[0047] On the one hand, the absolute value of the difference in length between the first magnetic member 31 with length Y1 and the second magnetic member 32 with length Y2 is at least 0.3mm greater than the moving stroke X1 of the second magnetic member 32, thereby covering the manufacturing and assembly errors of the first magnetic member 31 and the second magnetic member 32, greatly reducing the misalignment probability of the first magnetic member 31 and the second magnetic member 32, and ensuring the energy utilization efficiency of the handle 100 of the electric toothbrush.

[0048] On the other hand, the absolute value of the difference in length between the first magnetic member 31 with length Y1 and the second magnetic member 32 with length Y2 is at most 3mm greater than the moving stroke X1 of the second magnetic member 32. Such a setting is to ensure that the size of the rotating drive assembly 3 along the central axis 21 direction will not be too large, which helps to lighten and miniaturize the handle 100 of the electric toothbrush.

[0049] Please refer to Figure 5 , the second magnetic member 32 has an initial position A, a first return position B, and a second return position C along the central axis 21 of the rotating shaft 2. Along the central axis 21 of the rotating shaft 2, the second magnetic member 32 at the initial position A is located between the second magnetic member 32 at the first return position B and the second magnetic member 32 at the second return position C. It should be noted that among the initial position A, the first return position B, and the second return position C, one of the first magnetic member 31 and the second magnetic member 32 will never exceed the other. Therefore, when the second magnetic member 32 switches between positions, it can ensure that the rotating drive assembly 3 and the linear drive assembly 4 can work effectively together as much as possible.

[0050] Moreover, since the initial position A is between the first return position B and the second return position C, when the rotating shaft 2 moves linearly, moving from the initial position A to the first return position B and the second return position C on both sides respectively can effectively prevent the accumulation of errors on one side due to continuous movement on one side, thereby causing misalignment between the first magnetic member 31 and the second magnetic member 32.

[0051] Furthermore, the setting of the initial position A, the first return position B and the second return position C can ensure that the movement of the linear drive component 4 is within a specific range, and can effectively control the translation amplitude of the rotating shaft 2 and the translation amplitude of the second magnetic component 32, which helps to maintain the stable operation of the rotating drive component 3 and the linear drive component 4 and prevent instability caused by improper motion range.

[0052] Specifically, along the central axis 21 of the rotating shaft 2, the distance between the second magnetic member 32 at the initial position A and the second magnetic member 32 at the first return position B is H1, and along the central axis 21 of the rotating shaft 2, the distance between the second magnetic member 32 at the initial position A and the second magnetic member 32 at the second return position C is H2; the handle 100 is configured as: H1 = H2. In the above embodiment, the distances between the initial position A to the first return position B and the second return position C are equal, that is, with the initial position A as the center, the first return position B and the second return position C are symmetrically designed, and this symmetrical design helps to simplify the control system and control logic, and this symmetrical movement helps to maintain the stable operation of the rotating shaft 2, reduce unnecessary shaking, and thus improve the stability of the entire electric toothbrush system. It should be noted that H1 and H2 can also be designed to have certain differences based on actual needs, and this is not limited.

[0053] In the above description, a position between the first turning position B and the second turning position C is taken as the initial position A. It can be understood that the initial position may also be the first turning position B or the second turning position C.

[0054] Please refer to Figure 4 as well as Figure 6 , along the central axis 21 of the rotating shaft 2, the moving stroke of the second magnetic member 32 is X1, wherein X1 refers to: the maximum stroke of the second magnetic member 32 moving along the central axis 21 of the rotating shaft 2 during the entire use of the handle 100. Specifically, if the second magnetic member 32 has the above-mentioned first return position B and the above-mentioned second return position C along the central axis 21 of the rotating shaft 2, X1 can be: the distance between the second magnetic member 32 at the first return position B and the second magnetic member 32 at the second return position C.

[0055] The length of the first magnetic component 31 along the central axis 21 of the rotating shaft 2 is Y1, the length of the second magnetic component 32 along the central axis 21 of the rotating shaft 2 is Y2, and the handle 100 is configured as follows: along the central axis 21 of the rotating shaft 2, the first magnetic component 31 never exceeds the second magnetic component 32 and Y2-Y1>X1; or, the handle 100 is configured as follows: along the central axis 21 of the rotating shaft 2, the second magnetic component 32 never exceeds the first magnetic component 31 and Y1-Y2>X1.

[0056] This application includes two embodiments. In one embodiment, the length of the first magnetic member 31 is less than that of the second magnetic member 32, and the sum of the length of the first magnetic member 31 and the moving distance of the first magnetic member 31 relative to the second magnetic member 32 is less than the length of the second magnetic member 32. Thus, when the two move relative to each other, it is ensured that the first magnetic member 31 does not extend beyond the second magnetic member 32, and the relative position between the first magnetic member 31 and the second magnetic member 32 is always maintained within a certain effective range of action. The magnetic pulling force generated by the rotation driving assembly 3 is small or even almost zero, so as to ensure that the magnetic interaction force between the first magnetic member 31 and the second magnetic member 32 can be continuous and stable, and prevent the magnetic acting force for driving rotation from weakening due to excessive change in the relative position between the first magnetic member 31 and the second magnetic member 32, thereby ensuring the energy utilization efficiency of the rotation driving assembly 3.

[0057] In addition, due to some errors in the actual manufacturing and assembly processes, in order to reduce the influence of the errors, in the actual situation, the sum of the length of the first magnetic member 31 and the moving distance of the first magnetic member 31 relative to the second magnetic member 32 cannot be equal to the length of the second magnetic member 32, but should be slightly greater than the length of the second magnetic member 32, so as to cover the above-mentioned errors, ensure that the first magnetic member 31 does not exceed the second magnetic member 32, and thereby improve the energy utilization efficiency of the handle 100 of the electric toothbrush.

[0058] In another embodiment, the length of the first magnetic member 31 is greater than that of the second magnetic member 32, and the sum of the length of the second magnetic member 32 and the moving distance of the second magnetic member 32 relative to the first magnetic member 31 is less than the length of the first magnetic member 31. Similarly, it can be known that such a setting is to cover the manufacturing and assembly errors, ensure that the second magnetic member 32 does not exceed the first magnetic member 31, and thereby improve the energy utilization efficiency of the handle 100 of the electric toothbrush.

[0059] Please continue to refer to Figure 6, in order to further reduce the influence of assembly errors, along the central axis 21 direction of the rotating shaft 2, the moving stroke of the second magnetic member 32 is X1, the length of the first magnetic member 31 along the central axis 21 of the rotating shaft 2 is Y1, and the length of the second magnetic member 32 along the central axis 21 direction of the rotating shaft 2 is Y2. The handle 100 is configured such that: X1 + 0.3mm ≤ Y2 - Y1 ≤ X1 + 3mm. Specifically, when the length of the first magnetic member 31 is greater than the length of the second magnetic member 32, the handle 100 is configured such that X1 + 0.3mm ≤ Y1 - Y2 ≤ X1 + 3mm, that is, the length of the second magnetic member 32 plus the moving distance of the second magnetic member 32 relative to the first magnetic member 31 is less than the length of the first magnetic member 31, and the difference is at least 0.3mm, which can cover manufacturing and assembly errors, reduce the misalignment probability between the first magnetic member 31 and the second magnetic member 32. However, this difference cannot be greater than 3mm. Such a setting is to ensure that the size of the rotation drive assembly 3 as a whole in the direction of the central axis 21 is not too large, which helps to lighten the weight of the handle 100 of the electric toothbrush.

[0060] When the length of the first magnetic member 31 is less than the length of the second magnetic member 32, the handle 100 is configured such that 0.3mm ≤ Y2 - Y1 - X1 ≤ 3mm. Similarly, it can cover manufacturing and assembly errors and also ensure that the size of the rotation drive assembly 3 as a whole in the direction of the central axis 21 is not too large, which helps to lighten the weight and miniaturize the handle 100 of the electric toothbrush.

[0061] It can be understood that the second magnetic member 32 has an initial position A along the central axis 21 direction of the rotating shaft 2. At the initial position A, along the central axis 21 direction of the rotating shaft 2, the distance between the midpoint of the first magnetic member 31 along the central axis 21 direction and the midpoint of the second magnetic member 32 along the central axis 21 direction is X2. The handle 100 is configured such that: 0mm ≤ X2 < 1mm.

[0062] That is, at the initial position A, the distance between the midpoint of the second magnetic member 32 along the central axis 21 direction and the midpoint of the first magnetic member 31 along the central axis 21 direction is less than 1mm. In some embodiments, the midpoints of the first magnetic member 31 and the second magnetic member 32 coincide at the initial position A. After the second magnetic member 32 moves between the first return position B and the second return position C from the initial position A, it will return to the initial position A, preventing the error of the movement distance of the rotating shaft 2 to one side from being successively superimposed, thereby causing misalignment between the first magnetic member 31 and the second magnetic member 32. Such a setting can ensure a certain movement range of the second magnetic member 32. In actual situations, the midpoints of the first magnetic member 31 and the second magnetic member 32 at the initial position A do not necessarily coincide exactly. Thus, when ensuring that the distance between their midpoints is less than 1mm, it can also prevent the risk of excessive deviation towards one side when the rotating shaft 2 and the second magnetic member 32 move along the central axis 21 direction.

[0063] The handle 100 of the electric toothbrush further includes a reset button and a control component. The control component is electrically connected to both the reset button and the linear drive component 4, and is configured to control the linear drive component 4 to drive the second magnetic member 32 to move to the initial position A when the reset button is triggered. In an embodiment of the present application, when reset is required, the user can trigger the reset function by pressing the reset button. At this time, the control component can receive an electrical signal from the reset button and control the linear drive component 4 to drive the second magnetic member 32 to be located at the initial position A, which can ensure that the second magnetic member 32 is located at the initial position A every time the handle 100 of the electric toothbrush is started, facilitating the reciprocating movement of the second magnetic member 32 at the initial position A each time, and effectively preventing the distance between the first magnetic member 31 and the second magnetic member 32 from being successively superimposed on one side, thereby causing misalignment between the first magnetic member 31 and the second magnetic member 32.

[0064] In an embodiment of the present application, the first magnetic member 31 is an electromagnetic coil and the second magnetic member 32 is a permanent magnet. It can be understood that the rotation drive component 3 includes a stator and a rotor. Among them, the stator includes the first magnetic member 31 and the rotor includes the second magnetic member 32. The electromagnetic coil can be energized to generate a magnetic field. By changing the magnitude and direction of the current, the intensity and direction of the magnetic field can be adjusted. The permanent magnet moves under the action of the magnetic field force generated by the electromagnetic coil. The combination of the electromagnetic coil and the permanent magnet can efficiently drive the rotation of the rotating shaft 2, and by controlling the magnitude and direction of the current of the electromagnetic coil, the rotation speed and direction of the rotating shaft 2 can be accurately controlled.

[0065] In addition, the electromagnetic coil is arranged on the stator and the permanent magnet is arranged on the rotor. Since the rotor rotates around the central axis 21 of the rotating shaft 2, the electromagnetic coil located on the stator is in a fixed state and will not rotate therewith, which can reduce the wear of the electromagnetic coil and prevent the phenomenon of the coil being broken during the rotation process.

[0066] Please refer to Figure 3 , the linear drive component 4 includes a third magnetic member 41 and a fourth magnetic member 42. The third magnetic member 41 is fixed relative to the housing 1, and the fourth magnetic member 42 is fixed relative to the rotating shaft 2. The third magnetic member 41 and the fourth magnetic member 42 are arranged opposite to each other along the radial direction of the rotating shaft 2. The linear drive component 4 includes a stator and a mover. Among them, the third magnetic member 41 is located at the stator and the fourth magnetic member 42 is located at the mover. In an embodiment of the present application, when the magnetic fields between the third magnetic member 41 and the fourth magnetic member 42 interact, a mutual acting thrust or pulling force will be generated. Since the fourth magnetic member 42 is fixed relative to the rotating shaft 2, the mutual acting force will be converted into a force that pushes the rotating shaft 2 to perform a linear motion, thereby efficiently driving the rotating shaft 2 to move along the central axis 21.

[0067] Further, the third magnetic member 41 is an electromagnetic coil, and the fourth magnetic member 42 is a permanent magnet. The electromagnetic coil can be energized to generate a magnetic field. By changing the magnitude and direction of the current, the intensity and direction of the magnetic field can be adjusted. The permanent magnet moves under the action of the magnetic field force generated by the electromagnetic coil. The combination of the electromagnetic coil and the permanent magnet can efficiently drive the rotation of the rotating shaft 2, and by controlling the magnitude and direction of the current of the electromagnetic coil, the rotation speed and direction of the rotating shaft 2 can be precisely controlled. The electromagnetic coil can be energized to generate a magnetic field. By changing the magnitude and direction of the current, the intensity and direction of the magnetic field can be adjusted. The permanent magnet moves under the action of the magnetic field force generated by the electromagnetic coil. The combination of the electromagnetic coil and the permanent magnet can efficiently drive the movement of the rotating shaft 2 along the central axis 21, and by controlling the magnitude and direction of the current of the electromagnetic coil, the movement speed and direction of the rotating shaft 2 can be precisely controlled.

[0068] In addition, the electromagnetic coil is arranged on the stator, and the permanent magnet is arranged on the rotor. Since the rotor moves along the central axis 21 of the rotating shaft 2, the electromagnetic coil located on the stator is in a fixed state and will not move therewith, which can reduce the wear of the electromagnetic coil and prevent the phenomenon of the coil being broken during the rotation process.

[0069] Please continue to refer to Figure 3 , the handle 100 of the electric toothbrush further includes two bearings. Each bearing is located in the housing 1 and sleeved on the rotating shaft 2, and along the direction of the central axis 21 of the rotating shaft 2, one bearing is located on the side of the rotation driving assembly 3 away from the linear driving assembly 4, and the other bearing is located on the side of the linear driving assembly 4 away from the rotation driving assembly 3. In the embodiment of the present application, by providing the bearings, a support point is provided for the rotation of the rotating shaft 2. Due to the design of balls or rollers inside the bearings, the direct contact between the rotating shaft 2 and the housing 1 can be effectively reduced, the friction coefficient during operation can be reduced, so that the rotating shaft 2 can run smoothly during rotation or movement, and energy loss can be reduced. Furthermore, the stability of the rotating shaft 2 is improved, the friction between the rotating shaft 2 and other components is reduced, so as to extend the service life of the rotating shaft 2.

[0070] In addition, in the present application, the two bearings are respectively located on both sides of the rotation driving assembly 3 and the linear driving assembly 4 in the mutually opposite directions, and the specifications of the two bearings are the same. With such a setting, the bearings can support the rotating shaft 2 at both ends of the rotating shaft 2, ensuring the stable operation of the rotating shaft 2 and preventing the unstable situation caused by the unilateral force on the rotating shaft 2. And the models and sizes of the two rotating shafts 2 are the same, which can effectively reduce the influence of the bearing errors with different sizes on both sides of the rotating shaft 2.

[0071] To improve the intelligence level of the electric toothbrush, the handle 100 of the electric toothbrush further includes a pressure sensor. The pressure sensor is located outside the housing 1 and is connected to the rotating shaft 2. The pressure sensor is used to detect the deformation of the rotating shaft 2. In the embodiment of the present application, the pressure sensor is electrically connected to the control component. By monitoring the deformation of the rotating shaft 2, feedback information is provided to the control component, and then the control component adjusts the rotation driving component 3 and the linear driving component 4 to adjust the movement amplitude and strength of the rotating shaft 2, ensuring that the strength of the electric toothbrush during brushing is appropriate and can achieve the effect of protecting teeth and gums.

[0072] To prevent collision interference between the pressure sensor and the housing 1, along the central axis 21 direction of the rotating shaft 2, the moving stroke of the second magnetic member 32 is X1, and the distance between the pressure sensor and the housing 1 is X2. The handle 100 is configured such that: X1 < X2. That is, the distance from the pressure sensor to the housing 1 is greater than the moving stroke of the second magnetic member 32 along the central axis 21 direction. When the rotating shaft 2 moves to the limit position along the central axis 21, the housing 1 will not collide with the pressure sensor, thus ensuring the stable operation of the pressure sensor.

[0073] In some embodiments, one of the rotating shaft 2 and the housing 1 is provided with two limiting surfaces, which are spaced along the central axis 21 direction of the rotating shaft 2. The other of the rotating shaft 2 and the housing 1 is provided with a limiting protrusion, which is located between the two limiting surfaces along the central axis 21 direction of the rotating shaft 2. The limiting protrusion is used to move between the two limiting surfaces driven by the rotation driving component 3.

[0074] In an exemplary solution, one of the rotating shaft 2 and the housing 1 can be provided with two protrusions, and the opposite two side surfaces of the two protrusions along the central axis 21 direction of the rotating shaft 2 can be configured as two limiting surfaces.

[0075] In another exemplary solution, one of the rotating shaft 2 and the housing 1 can be provided with a limiting groove, and the opposite two inner wall surfaces of the limiting groove along the central axis 21 direction of the rotating shaft 2 can be configured as two limiting surfaces.

[0076] It can be understood that when the rotation driving component 3 drives the rotating shaft 2 to rotate, the limiting protrusion moves between the two limiting surfaces. The shapes and relative positions of the two limiting surfaces can determine the maximum range of movement of the limiting protrusion, thereby limiting the rotation angle of the rotating shaft 2. In the embodiment of the present application, the positions of the limiting protrusion and the two limiting surfaces are not limited as long as the cooperation effect can be achieved.

[0077] In addition, in the embodiments of the present application, by providing a limiting protrusion and two limiting surfaces, the normal operation of the handle 100 of the electric toothbrush is ensured, the rotation angle of the rotating shaft 2 is prevented from being too large, and the internal structure of the handle 100 of the electric toothbrush is protected. For example, for a pressure sensor, the pressure sensor and the control component are connected by a wire. The limiting protrusion and the two limiting surfaces can ensure that the rotating shaft 2 rotates within a certain range, preventing excessive stretching or twisting of the wire, thereby protecting the internal structure of the handle 100.

[0078] Specifically, the central angle clamped by the two limiting surfaces is α, and the handle 100 is configured such that: 3° ≤ α ≤ 50°. That is, the rotation range of the rotating shaft 2 is from 3° to 50°. It can be understood that, while maintaining the above rotation range, the rotation angle of the rotating shaft 2 can be ensured to be appropriate, which can guarantee the cleaning effect while reducing the excessive stimulation of the teeth and gums during tooth cleaning, and improving the comfort of the user. At the same time, keeping the angle range greater than or equal to 3° can prevent the user from needing to adjust the position of the brush head more frequently due to too small a rotation angle, and the angle range less than or equal to 50° helps to reduce the wear of the parts inside the handle 100 and contributes to the stable operation of the electric toothbrush.

[0079] In a second aspect, the embodiments of the present application provide an electric toothbrush, which includes the handle 100 of the above-mentioned electric toothbrush. The specific structure of the handle 100 of this electric toothbrush refers to the above embodiments. Since the electric toothbrush adopts all the technical solutions of the above-mentioned all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated one by one here.

[0080] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model 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 thus cannot be construed as a limitation of the present utility model.

[0081] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0082] In the present utility model, unless otherwise clearly specified or limited, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0083] In the present utility model, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0084] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without conflict, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0085] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A handle (100) of an electric toothbrush, characterized in that, Comprising: A housing (1); A rotating shaft (2), one end of which is located inside the housing (1), and the other end passes through the housing (1) and is located outside the housing (1); A rotational driving assembly (3), located inside the housing (1), comprising a first magnetic member (31) and a second magnetic member (32), the first magnetic member (31) being fixed relative to the housing (1), the second magnetic member (32) being fixed relative to the rotating shaft (2), the first magnetic member (31) and the second magnetic member (32) being arranged opposite each other along the radial direction of the rotating shaft (2) for driving the rotating shaft (2) to rotate relative to the housing (1) about the central axis (21) of the rotating shaft (2); A linear driving assembly (4), located inside the housing (1) and distributed along the central axis (21) direction of the rotating shaft (2), the linear driving assembly (4) connecting the housing (1) and the rotating shaft (2) for driving the rotating shaft (2) to move relative to the housing (1) along the central axis (21) direction of the rotating shaft (2); Wherein, the handle (100) is configured such that: along the central axis (21) direction of the rotating shaft (2), the first magnetic member (31) never extends beyond the second magnetic member (32), or, along the central axis (21) direction of the rotating shaft (2), the second magnetic member (32) never extends beyond the first magnetic member (31).

2. The handle (100) of the electric toothbrush according to claim 1, characterized in that, The second magnetic member (32) has an initial position (A), a first return position (B) and a second return position (C) along the central axis (21) direction of the rotating shaft (2); Along the central axis (21) direction of the rotating shaft (2), the second magnetic member (32) at the initial position (A) is located between the second magnetic member (32) at the first return position (B) and the second magnetic member (32) at the second return position (C).

3. The handle (100) of the electric toothbrush according to claim 2, characterized in that, Along the central axis (21) direction of the rotating shaft (2), the distance between the second magnetic member (32) at the initial position (A) and the second magnetic member (32) at the first return position (B) is H1, and along the central axis (21) direction of the rotating shaft (2), the distance between the second magnetic member (32) at the initial position (A) and the second magnetic member (32) at the second return position (C) is H2; The handle (100) is configured such that: H1 = H2.

4. The handle (100) of the electric toothbrush according to claim 1, characterized in that, Along the central axis (21) direction of the rotating shaft (2), the moving stroke between the second magnetic members (32) is X1, the length of the first magnetic member (31) along the central axis (21) of the rotating shaft (2) is Y1, and the length of the second magnetic member (32) along the central axis (21) direction of the rotating shaft (2) is Y2; The handle (100) is configured such that: along the central axis (21) direction of the rotating shaft (2), the first magnetic member (31) never extends beyond the second magnetic member (32) and Y2 - Y1 > X1; Alternatively, the handle (100) is configured such that: along the central axis (21) direction of the rotating shaft (2), the second magnetic member (32) never extends beyond the first magnetic member (31) and Y1 - Y2 > X1.

5. The handle (100) of the electric toothbrush according to claim 1, characterized in that, Along the central axis (21) direction of the rotating shaft (2), the moving stroke of the second magnetic member (32) is X1, the length of the first magnetic member (31) along the central axis (21) of the rotating shaft (2) is Y1, and the length of the second magnetic member (32) along the central axis (21) direction of the rotating shaft (2) is Y2. The handle (100) is configured such that: X1 + 0.3 mm ≤ |Y1 - Y2| ≤ X1 + 3 mm.

6. The handle (100) of the electric toothbrush according to claim 1, characterized in that, The second magnetic member (32) has an initial position (A) along the central axis (21) direction of the rotating shaft (2). In the initial position (A), along the central axis (21) direction of the rotating shaft (2), the distance between the midpoint of the first magnetic member (31) along the central axis (21) of the rotating shaft (2) and the midpoint of the second magnetic member (32) along the central axis (21) of the rotating shaft (2) is X2. The handle (100) is configured such that: 0 mm ≤ X2 < 1 mm.

7. The handle (100) of the electric toothbrush according to claim 6, characterized in that, Further comprising: A reset button; And A control component, electrically connected to both the reset button and the linear drive component (4), for controlling the linear drive component (4) to drive the second magnetic member (32) to move to the initial position (A) when the reset button is triggered.

8. The handle (100) of the electric toothbrush according to claim 1, characterized in that, The first magnetic member (31) is an electromagnetic coil, and the second magnetic member (32) is a permanent magnet.

9. The handle (100) of the electric toothbrush according to claim 1, characterized in that, The linear drive component (4) includes a third magnetic member (41) and a fourth magnetic member (42). The third magnetic member (41) is fixed relative to the housing (1), the fourth magnetic member (42) is fixed relative to the rotating shaft (2), and the third magnetic member (41) and the fourth magnetic member (42) are disposed opposite to each other along the radial direction of the rotating shaft (2).

10. The handle (100) of the electric toothbrush according to claim 9, characterized in that, The third magnetic member (41) is an electromagnetic coil, and the fourth magnetic member (42) is a permanent magnet.

11. The handle (100) of the electric toothbrush according to claim 1, characterized in that, Further comprising: Two bearings, located inside the housing (1) and sleeved on the rotating shaft (2), and along the central axis (21) direction of the rotating shaft (2), one of the bearings is located on the side of the rotation drive component (3) away from the linear drive component (4), and the other bearing is located on the side of the linear drive component (4) away from the rotation drive component (3).

12. The handle (100) of the electric toothbrush according to claim 1, characterized in that, Further comprising: A pressure sensor, located outside the housing (1) and connected to the rotating shaft (2), and the pressure sensor is used to detect the deformation amount of the rotating shaft (2).

13. The handle (100) of the electric toothbrush according to claim 12, characterized in that, Along the central axis (21) direction of the rotating shaft (2), the moving stroke of the second magnetic member (32) is X1, and the distance between the pressure sensor and the housing (1) is X2. The handle (100) is configured such that: X1 < X2.

14. The handle (100) of the electric toothbrush according to claim 1, characterized in that One of the rotating shaft (2) and the housing (1) is provided with two limiting surfaces which are arranged at intervals along the direction of the central axis (21) of the rotating shaft (2). The other of the rotating shaft (2) and the housing (1) is provided with a limiting convex, and the limiting convex is located between the two limiting surfaces along the direction of the central axis (21) of the rotating shaft (2). The limiting convex is used to move between the two limiting surfaces driven by the rotation driving assembly (3).

15. The handle (100) of the electric toothbrush according to claim 14, characterized in that, The central angle formed by the two limiting surfaces is α, The handle (100) is configured such that: 3° ≤ α ≤ 50°.

16. An electric toothbrush, characterized in that, A handle (100) of an electric toothbrush according to any one of claims 1 to 15 is included.

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