Acoustic wave motor and electric toothbrush

Abstract

The utility model discloses a sound wave motor, which comprises a shell, a stator mechanism, a rotor mechanism and a cover body, and is characterized in that the shell forms an accommodating cavity with a first port and a second port; the stator mechanism is connected with the shell and is accommodated in the accommodating cavity; the rotor mechanism is at least partially accommodated in the accommodating cavity, and the rotor mechanism comprises a rotating shaft assembly which is rotatably connected with the shell and is partially exposed out of the shell through the first port, and a rotor assembly connected with the rotating shaft assembly; the cover body covers the second port; wherein the stator mechanism is used for driving the rotor assembly to rotate by a first deflection angle in a first direction by taking the rotating shaft assembly as an axis and is also used for driving the rotor assembly to rotate by a second deflection angle in a second direction by taking the rotating shaft assembly as the axis, and the first direction and the second direction are opposite; the stator mechanism is provided with a magnetic component, the rotor assembly is provided with a rotor iron core, and a gap of 0.2-5 mm exists between the magnetic component and the rotor iron core in the extending direction perpendicular to the rotating shaft assembly. The utility model further discloses a brush handle and an electric toothbrush. The sound wave motor is installed on the brush handle and the electric toothbrush.

Description

Technical Field

[0001] The present application relates to the field of personal care technology, and in particular to a sonic motor and an electric toothbrush. Background Art

[0002] An electric toothbrush is an oral cleaning tool that uses a motor to drive the brush head to clean the user's mouth. Related art electric toothbrushes are vibrating electric toothbrushes. Vibrating toothbrushes use a motor to drive the brush head to vibrate at high speed, generating cavitation. However, these vibrating toothbrushes are not effective in cleaning the spaces between teeth. Utility Model Content

[0003] The main purpose of the embodiments of the present application is to provide a sonic motor and an electric toothbrush.

[0004] In a first aspect, the present application provides a sonic motor, comprising:

[0005] a housing forming a receiving cavity having a first port and a second port;

[0006] a stator mechanism connected to the housing and accommodated in the accommodating cavity;

[0007] a rotor mechanism, at least partially accommodated in the accommodating cavity, and comprising a shaft assembly rotatably connected to the housing and partially exposed to the housing through the first port, and a rotor assembly connected to the shaft assembly;

[0008] a cover body, the cover body covering the second port;

[0009] In which, the stator mechanism is used to drive the rotor assembly to rotate a first deflection angle along a first direction with the rotating shaft assembly as the axis, and is also used to drive the rotor assembly to rotate a second deflection angle along a second direction with the rotating shaft assembly as the axis, and the first direction and the second direction are opposite to each other; and the stator mechanism is provided with a magnetic component, and the rotor assembly is provided with a rotor core, and there is a gap between the magnetic component and the rotor core in the extension direction perpendicular to the rotating shaft assembly; the width of the gap is D, and satisfies the following: 0.2mm≤D≤5mm.

[0010] It can be seen from the technical solution provided in the present application that the sonic motor provided in the present application uses a shell to fix the stator mechanism and rotatably connect it to the rotor mechanism, and the stator mechanism can drive the rotor assembly to rotate a first deflection angle along a first direction with the rotating shaft assembly as the axis, thereby driving the rotating shaft assembly to rotate a first angle along the first direction, and can also drive the rotor assembly to rotate a second deflection angle along a second direction opposite to the first direction with the rotating shaft assembly as the axis, thereby driving the rotating shaft assembly to rotate a second angle along the second direction, and then through the deflection and vibration of the rotating shaft assembly in the first direction and the second direction, it can drive the external object connected to the rotating shaft assembly (such as a brush head) to synchronously deflect and vibrate back and forth in the first direction and the second direction. Through high-speed reciprocating deflection and vibration, the brush head can simulate the sweeping and vibration effect of the user sweeping up and down the teeth.

[0011] At the same time, there is a gap of 0.2mm to 5mm between the magnetic components of the stator mechanism and the rotor core of the rotor assembly in the extension direction of the vertical shaft assembly to avoid the gap being too small to reduce the tooth torque of the ultrasonic motor and improve the drivability. At the same time, it is avoided that the gap is too large, causing a large loss of magnetic flux between the magnetic components and the rotor assembly, which makes the ultrasonic motor power consumption too high. The gap in this value range can reduce the resistance encountered by the stator mechanism in the process of driving the rotor mechanism to swing, thereby making the operation of the ultrasonic motor smoother and easier to achieve large-angle sweeping vibration of the ultrasonic motor.

[0012] When the sonic motor is applied to an electric toothbrush, it can drive the brush head to swing and vibrate at high speed. By vibrating the water, toothpaste and other liquids in the mouth, a large number of tiny bubbles are generated. The bubbles burst instantly around the teeth to produce high-pressure impact cleaning. At the same time, the swinging brush head enhances the friction effect, and can clean the teeth in all directions and deeply into the gaps between teeth.

[0013] In some embodiments, a non-magnetic medium is provided in a gap between the magnetic component and the rotor core perpendicular to the extension direction of the shaft assembly. Optionally, the non-magnetic medium includes at least gel.

[0014] In this embodiment, based on the fact that the non-magnetic medium has little effect on the transfer of magnetic flux between the magnetic component and the rotor assembly, a non-magnetic medium is provided in the gap between the magnetic component and the rotor core in the extension direction of the vertical shaft assembly, so that the non-magnetic medium can be used to absorb vibrations and silence noise of the sonic motor.

[0015] Furthermore, the non-magnetic medium is set to gel. Gel is between solid and liquid states, and the resistance of gel is small or even negligible. It can not only absorb vibration and have a buffering effect, but also absorb the noise generated during the operation of the sonic motor.

[0016] In some embodiments, the first deflection angle is W1, and 15°≤W1≤60°; and / or the second deflection angle is W2, and 15°≤W2≤60°. Optionally, the first deflection angle and the second deflection angle are the same.

[0017] In this embodiment, the first deflection angle and the second deflection angle are set within a reasonable range, so that the stator mechanism can drive the rotor assembly to rotate along the first direction or the second direction with the shaft assembly as the axis, and drive the shaft assembly to rotate along the first direction or the second direction by a corresponding angle, so as to avoid the shaft assembly rotating at an angle that is too small, resulting in the external object (such as a brush head) connected to the shaft assembly being driven to achieve a small range of sweeping vibration, or to avoid the shaft assembly rotating at an angle that is too large, resulting in the external object (such as a brush head) connected to the shaft assembly being driven to achieve a large range of sweeping vibration, thereby causing damage to some areas in the oral cavity, such as the oral mucosa.

[0018] Furthermore, the magnitude of the first deflection angle is the same as the magnitude of the second deflection angle, so that the deflection of the sonic motor in two different directions is more balanced.

[0019] In some embodiments, the stator mechanism further includes a fixing frame, and the magnetic component is disposed on the fixing frame and fixed to the housing through the fixing frame.

[0020] In this embodiment, the magnetic component is fixed in the shell by a fixing frame. During the manufacturing process of the sonic wave motor, the magnetic component can be first fixed at a preset position of the fixing frame, and the fixing frame with the magnetic component fixed can be fixed in the shell. This not only better achieves the fixation of the magnetic component, but also facilitates the assembly of the sonic wave motor.

[0021] In some embodiments, the fixing frame is provided with a mounting groove, the magnetic component is mounted in the mounting groove and fixed to the fixing frame through the mounting groove; wherein, the depth of the mounting groove in the extension direction perpendicular to the shaft assembly is 0.5 mm-1 mm.

[0022] In this embodiment, when the shell size of the sonic wave motor and the size of the rotor mechanism remain unchanged, the gap width between the magnetic component and the rotor core in the extension direction of the vertical shaft assembly is adjusted by adjusting the depth of the installation groove for installing the magnetic component, so that the gap is increased as much as possible within an appropriate range, and the resistance encountered by the stator mechanism in the process of driving the rotor mechanism to swing is reduced, thereby making the operation of the sonic wave motor smoother and more easily realizing large-angle sweeping vibration of the sonic wave motor.

[0023] In some embodiments, the thickness of the magnetic component in a direction perpendicular to the extension direction of the rotating shaft assembly is 0.8 mm-1.6 mm.

[0024] In this embodiment, when the shell size of the sonic wave motor and the size of the rotor mechanism remain unchanged, the thickness of the magnetic component is adjusted within a reasonable range, thereby adjusting the gap width between the magnetic component and the rotor core in the extension direction of the vertical shaft assembly, so that the gap is increased as much as possible within an appropriate range, thereby reducing the resistance encountered by the stator mechanism in the process of driving the rotor mechanism to swing, thereby making the operation of the sonic wave motor smoother and more easily realizing large-angle sweeping vibration of the sonic wave motor.

[0025] In some embodiments, the rotor assembly also includes a rotor coil, the rotor core includes a connecting portion, a winding portion and a limiting portion, the connecting portion is connected to the shaft assembly, the winding portion connects the connecting portion and the limiting portion, and the rotor coil is wound around the winding portion, the limiting portion is used to limit the rotor coil in an extension direction perpendicular to the shaft assembly, and there is a gap between the limiting portion and the magnetic component in the extension direction perpendicular to the shaft assembly; wherein, the thickness of the limiting portion in the extension direction perpendicular to the shaft assembly is 0.2 mm-0.8 mm.

[0026] In this embodiment, while the dimensions of the sonic motor housing and the stator mechanism remain unchanged, the thickness of the limiting portion of the rotor core of the rotor mechanism in a direction perpendicular to the extension of the shaft assembly is adjusted to adjust the width of the gap between the magnetic component and the rotor core in the direction perpendicular to the extension of the shaft assembly. This gap is increased as much as possible within an appropriate range, thereby reducing the resistance experienced by the stator mechanism when driving the rotor mechanism to swing. This allows the sonic motor to operate more smoothly and more easily achieve wide-angle sweeping vibration. In some embodiments, only one rotor assembly is provided on the shaft assembly.

[0027] In this embodiment, the sonic motor is a single-rotor sonic motor. The single-rotor sonic motor is relatively small in size. When used as a driver for an electric toothbrush, the size of the electric toothbrush can be effectively reduced.

[0028] In some embodiments, the magnetic component includes at least a first magnetic component and a second magnetic component, wherein a first gap exists between the first magnetic component and the rotor core of the rotor assembly in a direction perpendicular to the extension direction of the rotating shaft assembly, and the first magnetic component is used to drive the rotor assembly to rotate the first deflection angle along the first direction with the rotating shaft assembly as the axis; and a second gap exists between the second magnetic component and the rotor core of the rotor assembly in a direction perpendicular to the extension direction of the rotating shaft assembly, and the second magnetic component is used to drive the rotor assembly to rotate the second deflection angle along the second direction with the rotating shaft assembly as the axis.

[0029] In this embodiment, different groups of magnetic components arranged at intervals are used to drive the rotor assembly to deflect in different directions. This not only avoids overheating of the magnetic components that may be caused by the same magnetic component driving the rotor assembly to deflect in different directions for a long time, but also better realizes the deflection control of the rotor assembly.

[0030] In some embodiments, the width of the first gap is D1, and D1 satisfies 0.2 mm ≤ D1 ≤ 5 mm; and / or the width of the second gap is D2, and D2 satisfies 0.2 mm ≤ D2 ≤ 5 mm. Optionally, the size of the first gap is the same as the size of the second gap.

[0031] In this embodiment, the gap between the corresponding magnetic components of the magnetic component and the rotor core in the extension direction of the vertical shaft component is set within an appropriate range to avoid the gap being too small to reduce the tooth torque of the sonic motor and improve the drivability, and at the same time avoid the gap being too large to cause a large loss of magnetic flux between the magnetic component and the rotor component, resulting in excessive power consumption of the sonic motor.

[0032] Furthermore, the gaps between the two groups of magnetic components and the rotor core are of the same size, which can simplify the deflection control parameters of the rotor assembly and better achieve the deflection control of the rotor assembly.

[0033] In some embodiments, the sonic motor further includes a lead wire connected to the rotor assembly; wherein one of the shell and the cover is provided with a wire hole, and the lead wire is partially exposed through the wire hole.

[0034] In this embodiment, by providing a lead wire, the sonic motor can be connected to an external control component through the lead wire to realize drive control of the sonic motor.

[0035] In some embodiments, the cover is provided with a lead placement portion, and the exposed lead wires can be at least partially accommodated in the lead placement portion.

[0036] In this embodiment, a wire passing hole is provided in at least one of the shell and the cover body, so that after the lead wire connected to the rotor mechanism is exposed through the wire passing hole, the exposed lead wire can be at least partially received in the lead wire placement portion, and then the sonic wave motor can use the lead wire placement portion provided on the cover body to receive or organize the lead wires, thereby reducing the chance of wear or even breakage of the lead wires of the sonic wave motor due to the disorderly placement of the lead wires during the transportation and / or assembly of the sonic wave motor.

[0037] At the same time, since the rotor mechanism can swing within two different angle ranges, the lead wires are easily stretched and worn. Providing wire holes and lead placement parts can standardize the lead wires, thereby reducing the risk of lead wire wear and breakage.

[0038] Furthermore, the lead placement portion is used to regulate the placement position of the lead wires, thereby standardizing the placement position of the lead wires of the sonic motor, making it easier to weld the lead wires using automated welding equipment, thereby improving the assembly efficiency of the product.

[0039] In a second aspect, an electric toothbrush comprises a brush head and a brush handle, wherein the brush handle is provided with a control component and the aforementioned sonic motor, wherein the sonic motor is connected to the control component and is used to drive the brush head to deflect by a first angle along the first direction or by a second angle along the second direction.

[0040] In some embodiments, the brush head is detachably connected to the sonic motor, and the sonic motor drives the brush head to vibrate while driving the brush head to deflect along the first direction and the second direction.

[0041] In this embodiment, after the sonic motor is applied to the electric toothbrush, it can drive the brush head to swing and vibrate at high speed, and generate a large number of tiny bubbles by vibrating the water, toothpaste and other liquids in the mouth. The bubbles burst instantly around the teeth to produce high-pressure impact cleaning. At the same time, the swinging brush head enhances the friction effect, and can clean the teeth in all directions and deeply into the gaps between teeth.

[0042] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0044] Figure 1 A schematic diagram of the three-dimensional structure of the sonic motor provided in an embodiment of the present application;

[0045] Figure 2 A schematic diagram of the explosion structure of the sonic motor provided in an embodiment of the present application;

[0046] Figure 3 A schematic diagram of the structure of the rotor mechanism and stator mechanism of the sonic motor provided in an embodiment of the present application;

[0047] Figure 4 A schematic diagram of a partial cross-sectional structure of a sonic motor provided in an embodiment of the present application;

[0048] Figure 5A schematic diagram of the state change of the rotor assembly of the sonic motor provided by an embodiment of the present application being deflected by the stator mechanism;

[0049] Figure 6 A schematic diagram of the three-dimensional structure of the rotor assembly of the sonic motor provided in an embodiment of the present application;

[0050] Figure 7 A schematic diagram of the three-dimensional structure of a brush handle provided in an embodiment of the present application;

[0051] Figure 8 This is a schematic diagram of the three-dimensional structure of the electric toothbrush provided in an embodiment of the present application. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0053] In the description of this application, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0054] An electric toothbrush is an oral cleaning tool that uses a motor to drive the brush head to clean the user's mouth. Related art electric toothbrushes are vibrating electric toothbrushes. Vibrating toothbrushes use a motor to drive the brush head to vibrate at high speed, generating cavitation. However, these vibrating toothbrushes are not effective in cleaning the spaces between teeth.

[0055] In order to solve the above technical problems, the present application provides a sonic motor and an electric toothbrush.

[0056] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. The following embodiments and features in the embodiments may be combined with each other unless there is any conflict.

[0057] See also Figures 1 to 3 , Figure 1 This is a schematic diagram of the three-dimensional structure of the sonic motor provided in this application.

[0058] like Figure 1 and Figure 2As shown, the sonic motor 10 includes a housing 11, a stator mechanism 12, a rotor mechanism 13, and a cover 14. The housing 11 defines a receiving chamber 113 having a first port 111 and a second port 112. The stator mechanism 12 is connected to the housing 11 and housed within the receiving chamber 113. The rotor mechanism 13 is at least partially housed within the receiving chamber 113 and includes a shaft assembly 131 rotatably connected to the housing 11 and partially exposed from the housing 11 through the first port 111, and a rotor assembly 132 connected to the shaft assembly 131. The cover 14 covers the second port 112.

[0059] The stator mechanism 12 is used to drive the rotor assembly 132 to rotate by a first deflection angle along a first direction with the rotating shaft assembly 131 as the axis, and is also used to drive the rotor assembly 132 to rotate by a second deflection angle along a second direction with the rotating shaft assembly 131 as the axis, wherein the first direction and the second direction are opposite to each other. In addition, the stator mechanism 12 is provided with a magnetic component 121, and the rotor assembly 132 is provided with a rotor core 1321. There is a gap between the magnetic component 121 and the rotor core 1321 in the extension direction perpendicular to the rotating shaft assembly 131, and the width of the gap is D, 0.2mm≤D≤5mm. For example, the width D of the gap can be, but is not limited to, 0.2mm, 0.3mm, 0.5mm, 1mm, 1.2mm, 1.5mm, 1.8mm, 2mm, etc. Figure 3 shown.

[0060] Optionally, the rotor mechanism 13 may include a rotatable connection with the shell 11 in which the shaft assembly 131 includes a shaft 1311, a first bearing assembly 1312 and a second bearing assembly 1313, the first bearing assembly 1312 is correspondingly arranged at the first port 111 of the shell 11 and is rotatably connected to the shaft 1311, and the second bearing assembly 1313 is arranged on the cover body 14 and is rotatably connected to the shaft 1311. That is, the rotating shaft 1311 is supported by the shell 11, and is rotatably connected to the shell 11 through the first bearing assembly 1312, and is rotatably connected to the cover body 14 through the second bearing assembly 1313. The rotor assembly 132 is fixed to the rotating shaft 1311, and under the action of the magnetic interaction force between the stator mechanism 12 and the rotor assembly 132, the rotor assembly 132 can form a deflection of a corresponding angle in the first direction or the second direction relative to the shell 11 with the rotating shaft 1311 as the axis, thereby driving an external object connected to the rotating shaft 1311 of the rotor assembly 132 (such as the brush head of an electric toothbrush) to perform a corresponding deflection action.

[0061] It is understood that the first direction can be a clockwise rotation direction with the rotating shaft 1311 of the rotating shaft assembly 131 as the axis, or a counterclockwise rotation direction with the rotating shaft 1311 of the rotating shaft assembly 131 as the axis. When the first direction is a clockwise rotation direction with the rotating shaft 1311 of the rotating shaft assembly 131 as the axis, the second direction is a counterclockwise rotation direction with the rotating shaft 1311 of the rotating shaft assembly 131 as the axis. When the first direction is a counterclockwise rotation direction with the rotating shaft 1311 of the rotating shaft assembly 131 as the axis, the second direction is a clockwise rotation direction with the rotating shaft 1311 of the rotating shaft assembly 131 as the axis.

[0062] The sonic motor 100 provided in the present application utilizes a shell 11 to fix a stator mechanism 12 and rotatably connects it to a rotor mechanism 13. In addition, the stator mechanism 12 can drive the rotor assembly 132 to rotate a first deflection angle along a first direction with the rotating shaft assembly 131 as the axis, thereby driving the rotating shaft assembly 131 to rotate a first angle along the first direction, and can also drive the rotor assembly 132 to rotate a second deflection angle along a second direction opposite to the first direction with the rotating shaft assembly 131 as the axis, thereby driving the rotating shaft assembly 131 to rotate a second angle along the second direction. Furthermore, through the deflection and vibration of the rotating shaft assembly 131 in the first and second directions, an external object (such as a brush head) connected to the rotating shaft assembly 131 can be driven to synchronously deflect and vibrate back and forth in the first and second directions. Through high-speed reciprocating deflection and vibration, the brush head can simulate the sweeping and vibration effect of the user sweeping up and down the teeth.

[0063] Furthermore, there is a gap of 0.2mm to 5mm between the magnetic component 121 of the stator mechanism 12 and the rotor core 1321 of the rotor assembly 132 in the extension direction of the vertical shaft assembly 131, so as to avoid the gap being too small to reduce the cogging torque of the sonic motor and improve the drivability, and to avoid the gap being too large to cause a large loss of magnetic flux between the magnetic component and the rotor assembly, which would cause the sonic motor to consume too much power. At the same time, the gap within this value range can reduce the resistance encountered by the stator mechanism 12 in the process of driving the rotor mechanism 13 to swing, thereby making the sonic motor 10 run smoother and more easily achieving large-angle sweeping vibration of the sonic motor 10. At the same time, it also ensures that after the brush head is connected to the sonic motor 10, the brush head can have better cleaning power through the drive of the sonic motor 10.

[0064] When the sonic motor is applied to an electric toothbrush, it can drive the brush head to swing and vibrate at high speed. By vibrating the water, toothpaste and other liquids in the mouth, a large number of tiny bubbles are generated. The bubbles burst instantly around the teeth to produce high-pressure impact cleaning. At the same time, the swinging brush head enhances the friction effect, and can clean the teeth in all directions and deeply into the gaps between teeth.

[0065] In some embodiments, a non-magnetic medium is provided in a gap between the magnetic component 121 and the rotor core 1321 in a direction perpendicular to the extension of the rotating shaft assembly 131. Optionally, the non-magnetic medium includes at least gel.

[0066] It is understood that the non-magnetic medium includes gel or wool felt. The non-magnetic medium can be disposed on the outer surface of the magnetic component 121 on the side closest to the rotor core 1321, or on the outer surface of the rotor core 1321 on the side closest to the magnetic component 121, thereby achieving the non-magnetic medium being disposed within the gap. Furthermore, when the non-magnetic medium is gel, the gel can be filled within the gap between the magnetic component 121 and the rotor core 1321 in the direction perpendicular to the extension of the rotating shaft assembly 131.

[0067] In this embodiment, since the non-magnetic medium has little effect on the transfer of magnetic flux between the magnetic component 121 and the rotor assembly 1321, a non-magnetic medium is provided in the gap between the magnetic component 121 and the rotor core 1321 in the extension direction of the vertical shaft assembly 131, so that the non-magnetic medium can be used to absorb vibrations and silence the sonic motor.

[0068] Furthermore, the non-magnetic medium is set to gel. Gel is between solid and liquid states, and the resistance of gel is small or even negligible. It can not only absorb vibration and have a buffering effect, but also absorb the noise generated during the operation of the sonic motor.

[0069] In some embodiments, the stator mechanism 12 can drive the rotor assembly 132 to rotate in a first direction with the shaft assembly 131 as the axis, and the first deflection angle is W1, and 15°≤W1≤60°. For example, the first deflection angle W1 can be but is not limited to 15°, 20°, 22°, 25°, 30°, 35°, 40°, 50°, 60°, etc.

[0070] Optionally, the second deflection angle of the rotor assembly 132 rotating in a second direction opposite to the first direction with the shaft assembly 131 as the axis is W2, and 15°≤W2≤60°. For example, the second deflection angle W2 can be but is not limited to 15°, 20°, 22°, 25°, 30°, 35°, 40°, 50°, 60°, etc.

[0071] Optionally, the first deflection angle is the same as the second deflection angle.

[0072] That is, the stator mechanism 12 drives the rotor assembly 132 to rotate at a first deflection angle W1 in a first direction with the rotating shaft assembly 131 as the axis through at least one group of magnetic components 121 at a first time, and drives the rotor assembly 132 to rotate at a second deflection angle W2 in a second direction with the rotating shaft assembly 131 as the axis at a second time. That is, the stator mechanism 12 drives the rotor assembly 132 to rotate at the first deflection angle in the first direction or the second deflection angle in the second direction in different time periods through at least one group of magnetic components 121.

[0073] In this embodiment, the first deflection angle and the second deflection angle are set within a reasonable range, so that the stator mechanism 12 can drive the rotor assembly 132 to rotate in the first direction or the second direction with the shaft assembly 131 as the axis, and drive the shaft assembly 131 to rotate by a corresponding angle in the first direction or the second direction, so as to avoid the shaft assembly 131 rotating at an angle that is too small, resulting in the external object (such as a brush head) connected to the shaft assembly 131 being driven to achieve a small range of sweeping vibration, or to avoid the shaft assembly 131 rotating at an angle that is too large, resulting in the external object (such as a brush head) connected to the shaft assembly 131 being driven to achieve a large range of sweeping vibration, thereby causing damage to some areas in the oral cavity, such as the oral mucosa.

[0074] Furthermore, the magnitude of the first deflection angle is the same as the magnitude of the second deflection angle, so that the deflection of the sonic motor in two different directions is more balanced.

[0075] See also Figures 3 to 5 In some embodiments, a specific implementation of a gap of width D between the magnetic component 121 and the rotor core 1321 in the direction perpendicular to the extension of the rotation shaft assembly 131 can be that the magnetic component 121 includes at least a first magnetic component 1211 and a second magnetic component 1212. A first gap D1 is formed between the first magnetic component 1211 and the rotor core 1321 of the rotor assembly 132 in the direction perpendicular to the extension of the rotation shaft assembly 131, and a second gap D2 is formed between the second magnetic component 1212 and the rotor core 1321 of the rotor assembly 132 in the direction perpendicular to the extension of the rotation shaft assembly 131.

[0076] The first magnetic component 1211 is used to drive the rotor component 132 to rotate about the shaft component 131 along a first direction by a first deflection angle W1 , and the second magnetic component 1212 is used to drive the rotor component 132 to rotate about the shaft component 131 along a second direction by a second deflection angle W2 .

[0077] It can be understood that the first magnetic component 1211 can be one or more groups, and the second magnetic component 1212 can also be one or more groups. There is no limitation here. It is only necessary that the first magnetic component 1211 is used to drive the rotor component 132 to rotate the first deflection angle W1 along the first direction with the rotating shaft component 131 as the axis, and the second magnetic component 1212 is used to drive the rotor component 132 to rotate the second deflection angle W2 along the second direction with the rotating shaft component 131 as the axis.

[0078] Optionally, each magnetic assembly group (e.g., first magnetic assembly 1211 and second magnetic assembly 1212) includes an even number of magnetic members, including but not limited to permanent magnets and magnetic steel. For example, if each magnetic assembly group includes two magnetic members, the two magnetic members are disposed on opposite sides of the inner wall of accommodating cavity 113, thereby better magnetically matching rotor assembly 132 and driving rotor assembly 132 to deflect by a corresponding angle in the first direction or the second direction about shaft assembly 131.

[0079] like Figure 5 As shown, in the initial state, the rotor mechanism 13 is in the initial position. At a first time, a control signal is output to the rotor mechanism 13 to control the first magnetic component 1211 of the stator mechanism 12 to drive the rotor mechanism 13 to deflect in a first direction corresponding to a first deflection angle W1 through a magnetic force, e.g., the first direction is clockwise. At a second time, a control signal is output to the rotor mechanism 13 to control the second magnetic component 1212 of the stator mechanism 12 to drive the rotor mechanism 13 to deflect in a second direction corresponding to a second deflection angle W2 through a magnetic force, e.g., the second direction is counterclockwise.

[0080] Optionally, the rotating shaft assembly 131 is provided with a reset member (such as a spring, a torsion spring), which is arranged between the rotating shaft 1311 and the cover body 14 and can be elastically deformed as the rotating shaft assembly 131 is deflected, so that when there is no need for the rotor mechanism 13 to deflect relative to the stator mechanism 12, the rotor mechanism 13 can be elastically reset under the elastic force of the reset member of the rotating shaft assembly 131.

[0081] In this embodiment, different groups of magnetic components arranged at intervals are used to drive the rotor assembly to deflect in different directions. This not only avoids overheating of the magnetic components that may be caused by the same magnetic component driving the rotor assembly to deflect in different directions for a long time, but also better realizes the deflection control of the rotor assembly.

[0082] In some embodiments, the width D1 of the first gap between the first magnetic component 1211 and the rotor core 1321 of the rotor component 132 in the extension direction of the vertical shaft component 131 satisfies 0.2mm≤D1≤5mm. For example, the width D1 of the first gap can be but is not limited to 0.2mm, 0.3mm, 0.5mm, 1mm, 1.2mm, 1.5mm, 1.8mm, 2mm, etc.

[0083] Optionally, the width D2 of the second gap between the second magnetic component 1212 and the rotor core 1321 of the rotor component 132 in the extension direction of the vertical shaft component 131 satisfies 0.2mm≤D2≤5mm. For example, the width D2 of the second gap can be but is not limited to 0.2mm, 0.3mm, 0.5mm, 1mm, 1.2mm, 1.5mm, 1.8mm, 2mm, etc.

[0084] Optionally, the size of the first gap is the same as the size of the second gap.

[0085] In this embodiment, the gap between the corresponding magnetic component 121 of the magnetic component and the rotor core 1321 in the extension direction of the vertical shaft component 131 is set within an appropriate range to avoid the gap being too small to reduce the tooth torque of the ultrasonic motor and improve the drivability, and at the same time avoid the gap being too large to cause a large magnetic flux loss between the magnetic component and the rotor component, resulting in excessive power consumption of the ultrasonic motor.

[0086] Furthermore, the gaps between the two groups of magnetic components and the rotor core 1321 are of the same size, which can simplify the deflection control parameters of the rotor assembly and better achieve the deflection control of the rotor assembly.

[0087] In some embodiments, the thickness of the magnetic component 121 in the extension direction of the vertical rotation shaft assembly 131 is 0.8mm-1.6mm, that is, the thickness of the magnetic component 121 can be but is not limited to 0.8mm, 0.9mm, 1.mm, 1.1mm, 1.2mm, 1.3mm, 1.5mm, 1.6mm, etc.

[0088] Exemplarily, the magnetic component 121 includes a first magnetic component 1211 and a second magnetic component 1212. The thickness of each magnetic component in the first magnetic component 1211 and the second magnetic component 1212 in the extension direction of the vertical rotating shaft component 131 is 0.8mm-1.6mm, and the thickness of each magnetic component can be but is not limited to 0.8mm, 0.9mm, 1.mm, 1.1mm, 1.2mm, 1.3mm, 1.5mm, 1.6mm, etc.

[0089] When the size of the shell 11 of the sonic wave motor 10 and the size of the rotor mechanism 13 remain unchanged, the thickness of the magnetic component 121 is adjusted to adjust the width of the gap between the magnetic component 121 and the rotor core 1321 in the extension direction of the vertical shaft assembly 131, so that the gap is increased as much as possible within an appropriate range, and the resistance encountered by the stator mechanism 12 in the process of driving the rotor mechanism 13 to swing is reduced, thereby making the operation of the sonic wave motor 10 smoother and more easily realizing large-angle sweeping vibration of the sonic wave motor 10.

[0090] like Figures 3 and 4 As shown, in some embodiments, the stator mechanism 12 further includes a fixing frame 122 , and the magnetic component 121 is disposed on the fixing frame 122 and fixed to the housing 11 through the fixing frame 122 .

[0091] In this embodiment, the magnetic component 121 is fixed in the shell 11 by the fixing frame 122. During the manufacturing process of the sonic wave motor 10, the magnetic component 121 can be first fixed at a preset position of the fixing frame 122, and the fixing frame 122 with the magnetic component 121 fixed thereon can be fixed in the shell 11. This not only better achieves the fixation of the magnetic component 121, but also facilitates the assembly of the sonic wave motor 10.

[0092] It is understood that the fixing frame 122 can fix the magnetic component 121 by providing a fixing portion on the fixing frame 122, which can be at least one of a groove or a protrusion, and forming an interference fit or a limit fit between the fixing portion and the magnetic component 121 to achieve the fixation of the magnetic component 121 on the fixing frame 122. Alternatively, adhesive can be provided between the fixing portion and the magnetic component 121, and the magnetic component 121 can be fixed to the fixing portion of the fixing frame 122 by the adhesive.

[0093] Exemplarily, the fixing frame 122 is provided with a mounting groove 1221, and the magnetic component 121 is installed in the mounting groove 1221 and fixed to the fixing frame through the mounting groove 1221; wherein, the depth of the mounting groove 121 in the extension direction of the vertical rotating shaft assembly is 0.5mm-1mm, for example, the depth of the mounting groove 121 can be but is not limited to 0.5mm, 0.6mm, 0.7mm, 0.8mm, etc.

[0094] In this embodiment, when the size of the shell 11 of the sonic wave motor 10 remains unchanged and the size of the rotor mechanism 13 remains unchanged, the gap width between the magnetic component 121 and the rotor core 1321 in the extension direction of the vertical shaft assembly 131 is adjusted by adjusting the depth of the installation groove 1221 for installing the magnetic component 121, so that the gap is increased as much as possible within an appropriate range, and the resistance encountered by the stator mechanism 12 in the process of driving the rotor mechanism 13 to swing is reduced, thereby making the operation of the sonic wave motor 10 smoother and more easily realizing large-angle sweeping vibration of the sonic wave motor 10.

[0095] See also Figure 6 In some embodiments, the number of the rotor assembly 132 provided on the rotating shaft assembly 131 is only one.

[0096] Exemplarily, there is only one rotor assembly 132 of the rotating shaft 1311 of the rotating shaft assembly 131, that is, the sonic wave motor is a single-rotor sonic wave motor, and the magnetic component 121 drives the rotating shaft 1311 to deflect in the first direction or the second direction by driving the single rotor assembly 132.

[0097] Since the sonic motor is a single-rotor sonic motor, the single-rotor sonic motor is relatively small in size. When used as a driver for an electric toothbrush, the size of the electric toothbrush can be effectively reduced.

[0098] See also Figure 2 、 Figure 3 and Figure 6 In some embodiments, the sonic motor 10 further includes a lead wire 133 connected to the rotor assembly 132, and the lead wire 133 is used to connect to an external control component to drive the sonic motor 10 to swing along the first direction or along the second direction through the external control component.

[0099] The rotor assembly 132 also includes a rotor coil 1322 wound around the rotor core 1321. Lead wires 133 are connected to the rotor coil 1322 for supplying power to the rotor coil 1322, effectively forming the rotor assembly 132 into an electromagnet. Furthermore, increasing the number of iron sheets in the rotor core 1321 can enhance the electromagnet's magnetic properties. One of the housing 11 and the cover 14 is provided with a wire hole 141, through which the lead wires 133 are partially exposed.

[0100] In some embodiments, the rotor assembly 132 also includes a rotor coil 1322, and the rotor core 1321 includes a connecting portion 1325, a winding portion 1326 and a limiting portion 1327. The connecting portion 1325 is connected to the rotating shaft assembly 131, and the winding portion 1326 is between the connecting portion 1325 and the limiting portion 1327, and is used to connect the connecting portion 1325 and the limiting portion 1327, and the rotor coil 1322 is wound around the winding portion 1326. The limiting portion 1327 is used to limit the rotor coil 1322 in the extension direction of the vertical rotating shaft assembly 131, and there is a gap between the limiting portion 1327 and the magnetic component in the extension direction of the vertical rotating shaft assembly 131. The thickness of the limiting portion 1327 in the extension direction of the vertical rotation shaft assembly 131 is 0.2 mm to 0.8 mm. For example, the thickness of the limiting portion 1327 can be but is not limited to 0.2 mm, 0.3 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, etc.

[0101] In this embodiment, when the size of the shell 11 of the sonic wave motor 10 remains unchanged and the size of the stator mechanism 12 remains unchanged, the thickness of the limiting portion 1327 in the rotor core 1321 in the extension direction perpendicular to the shaft assembly 131 is adjusted to adjust the width of the gap between the magnetic component 121 and the rotor core 1321 in the extension direction perpendicular to the shaft assembly 131, so that the gap is increased as much as possible within an appropriate range, and the resistance encountered by the stator mechanism 12 in the process of driving the rotor mechanism 13 to swing is reduced, thereby making the operation of the sonic wave motor 10 smoother and more easily realizing large-angle sweeping vibration of the sonic wave motor 10.

[0102] In some embodiments, the cover 14 is provided with a lead placement portion 140, wherein at least one of the housing 11 and the cover 14 is provided with a wire hole 141 communicating with the accommodating cavity 113, the lead wire 133 is partially exposed through the wire hole 141, and the exposed lead wire 133 can be at least partially received in the lead placement portion 140, such as Figure 2 shown.

[0103] In this embodiment, by providing a wire hole 141 in at least one of the housing 11 and the cover, the lead wires 133 connected to the rotor mechanism 13 are exposed through the wire hole 141. The exposed lead wires 133 can be at least partially received in the lead wire placement portion 140. The sonic motor can then utilize the lead wire placement portion 140 provided on the cover 14 to receive or organize the lead wires 133. This reduces the probability of wear or even breakage of the lead wires 133 of the sonic motor due to disordered placement of the lead wires 133 during transportation and / or assembly of the sonic motor.

[0104] At the same time, since the rotor mechanism 13 can swing within two different angle ranges, the lead wire 133 is easily stretched and worn. Providing the wire hole 141 and the lead placement portion 140 can standardize the lead wire, thereby reducing the risk of the lead wire 133 being worn and broken.

[0105] Furthermore, the placement position of the lead wire 133 is standardized by the lead placement portion 140, thereby achieving standardization of the placement position of the lead wire 133 of the sonic motor, making it easier to weld the lead wire 133 using automated welding equipment, thereby improving product assembly efficiency.

[0106] like Figure 2 As shown, in some embodiments, the lead placement portion 140 includes an open placement groove 140a, into which the lead wire 133 can be placed. Optionally, at least one of the opposite ends of the placement groove 140a has a chamfered end surface. Optionally, the open end of the placement groove 140a has a chamfered end surface.

[0107] By providing a chamfer at least one of the opposite ends of the placement groove 140 a and / or at the open portion of the placement groove 140 a , wear of the lead wire 133 can be effectively reduced during the contact between the lead wire 133 and the chamfer.

[0108] It is understandable that the lead placement portion 140 can be provided in at least one of the housing 11 and the cover 14 , and this is not limited here.

[0109] See also Figure 7 The present application also provides a brush handle 100, which includes a sonic motor 10 and a control component 20 connected to the sonic motor 10. The user can trigger the control component 20 by pressing, sliding, pushing and pulling, etc., so as to control the sonic motor 10 to perform corresponding actions through the control component 20.

[0110] For example, the control component 20 is connected to the sonic motor 10 via a connecting wire, and is used to power the sonic motor 10 and receive an external trigger signal to drive the sonic motor 10 to move, so that the sonic motor 10 can drive an external object connected to the sonic motor 10 to move. For example, the external object is a brush head. After the sonic motor 10 is connected to the brush head, it can drive the brush head to deflect along a first direction by a first angle or along a second direction by a second angle, so that the brush head can clean the teeth.

[0111] The control component 20 includes a circuit board and a power supply component, which includes but is not limited to a battery. The circuit board can be a single-sided board, a double-sided board or a multi-layer board. This application does not specifically limit the type, model and size of the circuit board.

[0112] See also Figure 8The present application also provides an electric toothbrush 100a, which includes a brush handle 100 and a brush head 200 connected to the brush handle 100. The brush head 200 is detachably connected to the sonic motor 10 mounted on the brush handle 100. The detachable connection method includes but is not limited to structural engagement and threaded connection.

[0113] like Figure 7 As shown, the brush head 200 is connected to the rotating shaft 1311 of the rotating shaft assembly 131 of the sonic motor 10, so that when the sonic motor 10 deflects in the first direction or the second direction, the brush head 200 is driven to deflect in the first direction or the second direction. In addition, the sonic motor 10 also drives the brush head 200 to vibrate while driving the brush head 200 to deflect along the first direction and the second direction, so that the brush head 200 can clean the teeth during the deflection process to achieve oral cleaning care.

[0114] In this embodiment, after the sonic motor 10 is applied to the electric toothbrush 100a, it can drive the brush head 200 to swing and vibrate at high speed, and generate a large number of tiny bubbles by vibrating the water, toothpaste and other liquids in the mouth. The bubbles burst instantly around the teeth to produce high-pressure impact cleaning. At the same time, the swinging brush head enhances the friction effect, and can clean the teeth in all directions and deeply into the gaps between teeth.

[0115] The serial numbers of the embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments. The above description is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection of the claims.

Claims

1. A sonic motor, characterized in that: include: a housing forming a receiving cavity having a first port and a second port; a stator mechanism connected to the housing and accommodated in the accommodating cavity; a rotor mechanism, at least partially accommodated in the accommodating cavity, and comprising a shaft assembly rotatably connected to the housing and partially exposed to the housing through the first port, and a rotor assembly connected to the shaft assembly; a cover body, the cover body covering the second port; In which, the stator mechanism is used to drive the rotor assembly to rotate a first deflection angle along a first direction with the rotating shaft assembly as the axis, and is also used to drive the rotor assembly to rotate a second deflection angle along a second direction with the rotating shaft assembly as the axis, and the first direction and the second direction are opposite to each other; and the stator mechanism is provided with a magnetic component, and the rotor assembly is provided with a rotor core, and there is a gap between the magnetic component and the rotor core in the extension direction perpendicular to the rotating shaft assembly; the width of the gap is D, and satisfies the following: 0.2mm≤D≤5mm.

2. The sonic motor according to claim 1, wherein: A non-magnetic medium is provided in a gap between the magnetic component and the rotor core in a direction perpendicular to the extension of the rotating shaft assembly.

3. The sonic motor according to claim 2, wherein: The non-magnetic medium includes at least gel.

4. The sonic motor according to claim 1, wherein: The first deflection angle is W1, and 15°≤W1≤60°; and / or the second deflection angle is W2, and 15°≤W2≤60°.

5. The sonic motor according to claim 4, wherein: The first deflection angle is the same as the second deflection angle.

6. The sonic motor according to claim 1, wherein: The stator mechanism further includes a fixing frame, the magnetic component is arranged on the fixing frame, and is fixed to the housing through the fixing frame.

7. The sonic motor according to claim 6, wherein: The fixing frame is provided with a mounting slot, the magnetic component is mounted in the mounting slot and fixed to the fixing frame through the mounting slot; Wherein, the depth of the mounting groove in the extending direction perpendicular to the rotating shaft assembly is 0.5 mm-1 mm.

8. The sonic motor according to claim 6, wherein: The thickness of the magnetic component in a direction perpendicular to the extension of the rotating shaft assembly is 0.8 mm to 1.6 mm.

9. The sonic motor according to claim 1, wherein: The rotor assembly further includes a rotor coil, and the rotor core includes a connecting portion, a winding portion, and a limiting portion, wherein the connecting portion is connected to the rotating shaft assembly, the winding portion connects the connecting portion and the limiting portion, and the rotor coil is wound around the winding portion, the limiting portion is used to limit the rotor coil in a direction perpendicular to the extension of the rotating shaft assembly, and a gap exists between the limiting portion and the magnetic component in the direction perpendicular to the extension of the rotating shaft assembly; Wherein, the thickness of the limiting portion in the extending direction perpendicular to the rotating shaft assembly is 0.2 mm-0.8 mm.

10. The sonic motor according to claim 1, wherein: The number of the rotor assembly disposed on the rotating shaft assembly is only one.

11. The sonic motor according to any one of claims 1 to 10, characterized in that: The magnetic component includes at least a first magnetic component and a second magnetic component, a first gap exists between the first magnetic component and the rotor core of the rotor component in the extension direction perpendicular to the shaft component, and the first magnetic component is used to drive the rotor component to rotate the first deflection angle along the first direction with the shaft component as the axis; a second gap exists between the second magnetic component and the rotor core of the rotor component in the extension direction perpendicular to the shaft component, and the second magnetic component is used to drive the rotor component to rotate the second deflection angle along the second direction with the shaft component as the axis.

12. The sonic motor according to claim 11, wherein: The width of the first gap is D1, and D1 satisfies 0.2 mm ≤ D1 ≤ 5 mm; and / or the width of the second gap is D2, and D2 satisfies 0.2 mm ≤ D2 ≤ 5 mm.

13. The sonic motor according to claim 12, wherein: The size of the first gap is the same as the size of the second gap.

14. The sonic motor according to any one of claims 1 to 10, characterized in that: The sonic motor further includes a lead wire connected to the rotor assembly; Wherein, one of the shell and the cover is provided with a wire-passing hole, and the lead-out wire is partially exposed through the wire-passing hole.

15. The sonic motor according to claim 14, wherein: The cover body is provided with a lead placement portion, and the exposed lead wires can be at least partially accommodated in the lead placement portion.

16. An electric toothbrush, characterized in that: It includes a brush head and a brush handle, the brush handle is provided with a control component and a sonic motor as described in any one of claims 1 to 15, the sonic motor is connected to the control component and is used to drive the brush head to deflect by a first angle along the first direction or deflect by a second angle along the second direction.

17. The electric toothbrush according to claim 16, wherein: The brush head is detachably connected to the sonic motor, and the sonic motor drives the brush head to vibrate while driving the brush head to deflect along the first direction and the second direction.

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