Acoustic motor and electric toothbrush

Abstract

The present application belongs to the field of electric toothbrushes, and specifically provides a sound wave motor and an electric toothbrush. The present application aims to solve the problem that the existing electric toothbrush has poor user experience due to the large vibration of the sound wave motor. To this end, the sound wave motor of the present application comprises a shell, a rotating shaft, an elastic support and an optional counterweight component. At least a part of the rotating shaft is located in the shell, the rotating shaft can oscillate relative to the shell in the circumferential direction, and at least a part of the elastic support extends to the outside of the shell in the radial direction of the rotating shaft. The counterweight component is connected with the elastic support. The electric toothbrush with the above-mentioned sound wave motor of the present application can effectively reduce the vibration of the electric toothbrush, thereby improving the user experience.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of electric toothbrushes, and particularly provides a sound wave motor and an electric toothbrush. BACKGROUND

[0002] The electric toothbrush mainly comprises a main body, a battery, a sound wave motor and a brush head. The battery and the sound wave motor are both mounted on the main body, and the rotating shaft of the sound wave motor is drivingly connected with the brush head. When the electric toothbrush is working, the rotating shaft of the sound wave motor swings at a high frequency, and thus forces the brush head to vibrate at a high frequency, instantaneously decomposes the toothpaste into fine foam, and deeply cleans the tooth gaps. At the same time, the vibration of the bristles can also promote the blood circulation of the oral cavity, and has a massage effect on the gum tissue.

[0003] However, when the existing sound wave motor is working, the reciprocating swing of the rotating shaft will cause the sound wave motor to generate strong vibration, and the vibration will be transmitted to the main body of the electric toothbrush, resulting in a poor feeling of the user holding the electric toothbrush. SUMMARY

[0004] An object of the present application is to solve the problem that the existing electric toothbrush has a poor user experience due to the large vibration of the sound wave motor thereof.

[0005] To achieve the above object, the present application provides, in a first aspect, a sound wave motor, comprising:

[0006] a housing,

[0007] a rotating shaft, at least a part of which is located in the housing, and the rotating shaft can swing in the circumferential direction thereof relative to the housing;

[0008] an elastic support provided on the housing, the elastic support being used for absorbing and / or counteracting at least a part of the vibration of the housing.

[0009] Optionally, the elastic support is provided on the outside of the housing, and the elastic support comprises a first elastic support located at a first end of the housing and a second elastic support located at a second end of the housing.

[0010] Optionally, the first elastic support comprises at least two first cantilever arms, and the second elastic support comprises at least two second cantilever arms.

[0011] Optionally, the sound wave motor further comprises at least one counterweight member, each of the counterweight members being connected with at least one of the first cantilever arms and at least one of the second cantilever arms.

[0012] Optionally, the number of the counterweight members is equal to the number of the first cantilever arms and the number of the second cantilever arms, and each of the counterweight members is connected with one of the first cantilever arms and one of the second cantilever arms.

[0013] Optionally, the first suspension arm is connected to the counterweight member through an end of the first suspension arm distal to the housing; and the second suspension arm is connected to the counterweight member through an end of the second suspension arm distal to the housing.

[0014] Optionally, the counterweight member is slidingly connected to the first suspension arm and the second suspension arm in a radial direction of the rotation shaft, so as to adjust a distance between the counterweight member and the housing, thereby adjusting an amplitude of the counterweight member, and further making a vibration frequency of the counterweight member same as and opposite to a vibration frequency of the housing.

[0015] Optionally, the counterweight member is configured as a rod-shaped structure, and a length direction of the counterweight member is parallel to an axial direction of the rotation shaft.

[0016] Optionally, at least two of the first suspension arms are centrally symmetric relative to the rotation shaft, and at least two of the second suspension arms are centrally symmetric relative to the rotation shaft; and / or, a swing center line of each of the first suspension arms and each of the second suspension arms is perpendicular to an axial line of the rotation shaft.

[0017] The present application also provides, in a second aspect, an electric toothbrush, comprising a main body, a brush head, and the sonic motor of any one of the first aspect, the sonic motor being mounted on the main body, the rotation shaft of the sonic motor being drivingly connected to the brush head, the rotation shaft being configured to drive the brush head to swing back and forth.

[0018] Based on the foregoing description, those skilled in the art can understand that, in the foregoing technical solutions of the present application, the elastic support is configured for the sonic motor, so that the elastic support can absorb and / or offset the vibration of the sonic motor when the sonic motor is working. Therefore, the sonic motor of the present application can reduce the vibration transmitted to the main body of the electric toothbrush, thereby improving the user experience of the electric toothbrush.

[0019] Further, by configuring the first elastic support to include at least two first suspension arms, configuring the second elastic support to include at least two second suspension arms, and arranging a counterweight member between the first suspension arms and the second suspension arms, the first suspension arms and the second suspension arms can increase their amplitudes and response times of passive vibration by means of the counterweight member, so as to make the first suspension arms and the second suspension arms vibrate at the same frequency as and in the opposite direction of the housing. Therefore, the sonic motor of the present application can offset a part of the vibration of the housing by means of the counterweight member.

[0020] Further, by slidingly connecting the counterweight member with the first and second cantilever arms in the radial direction of the rotation shaft, the elastic support and the counterweight member can adapt to different vibration frequencies of the acoustic motor, and also facilitate the assembly, testing, and calibration of the acoustic motor by the personnel. Specifically, by slidingly connecting the counterweight member with the first and second cantilever arms in the radial direction of the rotation shaft, the counterweight member can adjust the distance between the counterweight member and the shell through the sliding connection, thereby adjusting the amplitude of the counterweight member, and further making the vibration frequency of the counterweight member the same and opposite to the vibration frequency of the shell.

[0021] The above and other objects, advantages and features of the present application will become more apparent from the following detailed description of specific embodiments thereof, when taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the present application, some embodiments of the present application will be described hereinafter with reference to the accompanying drawings. It should be understood by those skilled in the art that the components or parts indicated by the same reference signs in different drawings are the same or similar; the drawings of the present application are not necessarily drawn to scale.

[0023] In the drawings:

[0024] Fig. 1 is a first axonometric view of an acoustic motor in some embodiments of the present application;

[0025] Fig. 2 is a second axonometric view of an acoustic motor in some embodiments of the present application;

[0026] Fig. 3 is a third axonometric view of an acoustic motor in some embodiments of the present application. DETAILED DESCRIPTION

[0027] It should be understood by those skilled in the art that the embodiments described hereinafter are only a part of the embodiments of the present application, but not all the embodiments of the present application, and the part of the embodiments are intended to explain the technical principles of the present application, but not to limit the protection scope of the present application. Based on the embodiments provided by the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor should still fall within the protection scope of the present application.

[0028] It should be noted that in the description of the present application, the terms "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is merely for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In addition, it should be further pointed out that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] It should be noted before that in order to facilitate the description and to enable those skilled in the art to quickly understand the technical solutions of the present application, only the technical features related to the technical problems and / or technical concepts to be solved by the present application (directly related or indirectly related) are described in the following, and the technical features with weak correlation to the technical problems and / or technical concepts to be solved by the present application are not described. Since the technical features with weak correlation belong to the common knowledge in the art, the disclosure of the present application will not be insufficient even if the weakly correlated features are not described.

[0031] As shown in Figs. 1-3 , in some embodiments of the present application, the acoustic wave motor comprises a shell 1, a coil (not shown in the figure), a magnet (not shown in the figure), a rotating shaft 2, an elastic support 3 and an optional counterweight member 4.

[0032] Among them, the coil and the magnet are arranged in the shell 1, and the combination of the coil and the magnet is used to drive the rotating shaft 2 to oscillate relative to the shell 1.

[0033] In an example of some embodiments of the present application, the coil and the magnet are fixedly connected with the shell 1 respectively, the coil is used to magnetize the rotating shaft 2 (or magnetize the silicon steel sheet fixedly connected with the rotating shaft 2), and the magnet is used to provide a magnetic field for the rotating shaft. When the coil is supplied with alternating current, the magnet will drive the magnetized rotating shaft 2 to reciprocate.

[0034] As shown in Figs. 1-3 , a part of the rotating shaft 2 is located in the shell 1, and the rotating shaft 2 can oscillate relative to the shell 1 in the circumferential direction of the rotating shaft 2.

[0035] In addition, the skilled person can also make the entire rotating shaft 2 located inside the shell 1, and configure a driving shaft of the rotating shaft 2 extending to the outside of the shell 1, and make the driving shaft fixedly connected with the rotating shaft 2 according to the needs.

[0036] As shown in Figs. 1-3 , a part of the elastic support 3 extends to the outside of the shell 1 in the radial direction of the rotating shaft 2, so that the elastic support 3 can absorb the vibration of the sonic motor through the part when the sonic motor works, and make the part produce vibration opposite to the sonic motor, thereby offsetting a part of the vibration of the sonic motor.

[0037] Continuing to refer to Figs. 1-3 , the elastic support 3 is arranged outside the shell 1, and the elastic support 3 includes a first elastic support 31 located at the first end of the shell 1 and a second elastic support 32 located at the second end of the shell 1. The first elastic support 31 and the second elastic support 32 can be installed together with the shell 1 in any feasible connection manner, such as clamping, welding, bonding, screw connection, etc. Alternatively, the skilled person can also make at least one of the first elastic support 31 and the second elastic support 32 integrally formed with the shell 1 according to the needs.

[0038] Further, the first elastic support 31 includes two first cantilever arms 311 as shown in Figs. 1-3 , and the second elastic support 32 includes two second cantilever arms 321 as shown in Figs. 1-3 .

[0039] In addition, the skilled person can also make the first elastic support 31 include other any number of first cantilever arms 311, such as one, three, five, six, etc. When the first elastic support 31 includes at least two first cantilever arms 311, the at least two first cantilever arms 311 are centrally symmetric with respect to the axis of the rotating shaft 2.

[0040] Similarly, the skilled person can also make the second elastic support 32 include other any number of second cantilever arms 321, such as one, three, five, six, etc. When the second elastic support 32 includes at least two second cantilever arms 321, the at least two second cantilever arms 321 are centrally symmetric with respect to the axis of the rotating shaft 2.

[0041] Preferably, the swing center line of each first cantilever arm 311 and each second cantilever arm 321 is perpendicular to the axis of the rotating shaft 2.

[0042] It is understood by those skilled in the art that, when the acoustic wave motor is in operation, the shaft 2 will transmit the vibration to the first and second cantilevers 311 and 321 through the housing 1, so that the first and second cantilevers 311 and 321 will periodically and reciprocally swing, and each of the first and second cantilevers 311 and 321 will form a swing range (usually a sector), and the center line of the swing range will be the swing center line of the first and second cantilevers 311 and 321.

[0043] Further preferably, the first and second cantilevers 311 and 321 are made of elastic materials, such as metal elastic sheets, rubber, elastic plastics, etc.

[0044] Continuing to refer to Figs. 1-3 Each of the first cantilevers 311 corresponds to one of the second cantilevers 321. In other words, the first and second cantilevers 311 and 321 are paired, and each pair of the first and second cantilevers 311 and 321 corresponds to one of the counterweight members 4.

[0045] Specifically, the first cantilever 311 is connected to the counterweight member 4 through the end thereof away from the housing 1, and the second cantilever 321 is connected to the counterweight member 4 through the end thereof away from the housing 1. Preferably, the first and second cantilevers 311 and 321 are fixedly connected to the counterweight member 4.

[0046] As shown in Figs. 1-3 The counterweight member 4 is provided in a rod-like structure, and the length direction of the counterweight member 4 is parallel to the axial direction of the shaft 2.

[0047] Further, if the first elastic support 31 includes at least two first cantilevers 311, those skilled in the art can configure the counterweight member 4 for only a part of the at least two pairs of the first and second cantilevers 311 and 321 according to the needs.

[0048] Alternatively, those skilled in the art can also connect one counterweight member 4 to multiple first cantilevers 311 and multiple second cantilevers 321 according to the needs.

[0049] Based on the foregoing description, those skilled in the art can understand that, in some embodiments of the present application, by configuring the acoustic wave motor with the first elastic support 31 having the first cantilever 311 and the second elastic support 32 having the second cantilever 321, and arranging the counterweight member 4 between the first cantilever 311 and the second cantilever 321, the first cantilever 311 and the second cantilever 321 can lift their own amplitude through the counterweight member 4, and the response time of the passive vibration of the first cantilever 311 and the second cantilever 321 is also lifted, so that the first cantilever 311 and the second cantilever 321 generate vibrations with the same frequency and opposite direction as the shell 1. Therefore, the acoustic wave motor of the present application can offset a part of the vibration on the shell 1 by means of the counterweight member 4.

[0050] In order to make the combination of the elastic support 3 and the counterweight member 4 adapt to acoustic wave motors with different vibration frequencies, in still other embodiments of the present application, those skilled in the art can also make the counterweight member 4 be connected with the first cantilever 311 and the second cantilever 321 in the radial direction of the rotating shaft 2 as needed, so as to adjust the distance between the counterweight member 4 and the shell 1, thereby adjusting the amplitude of the counterweight member 4, and further making the vibration frequency of the counterweight member 4 the same and opposite to the vibration frequency of the shell 1.

[0051] For example, the counterweight member 4 is provided with a sliding groove at each end, and the first cantilever 311 and the second cantilever 321 are respectively clamped into the sliding grooves at the two ends of the counterweight member 4. Preferably, the counterweight member 4 is in interference fit with the first cantilever 311 and the second cantilever 321 through the sliding grooves. When it is necessary to adjust the distance between the counterweight member 4 and the shell 1, the operator only needs to slide the counterweight member 4 along the length direction of the first cantilever 311 and the second cantilever 321.

[0052] Alternatively, those skilled in the art can also make at least one of the first elastic support 31 and the second elastic support 32 be pivotally connected with the shell 1 in other embodiments of the present application, so that at least one of the first elastic support 31 and the second elastic support 32 can rotate relative to the shell 1. When it is necessary to adjust the distance between the counterweight member 4 and the shell 1, the operator can make the first cantilever 311 and the second cantilever 321 be out of position in the circumferential direction through the first elastic support 31 and / or the second elastic support 32, so that the counterweight member 4 is deflected relative to the rotating shaft 2, and thus the counterweight member 4 is closer to the shell 1.

[0053] For example, the first elastic support 31 is pivotally connected with the shell 1, and the friction between the first elastic support 31 and the shell 1 is relatively large, so as to prevent the first elastic support 31 from rotating by itself due to the vibration of the acoustic wave motor.

[0054] Furthermore, although not shown in the figures, in some embodiments of the present invention, those skilled in the art may, as needed, make the elastic support 3 include other numbers of elastic supports, such as one, three, four, etc.

[0055] Furthermore, although not shown in the figure, compared with any of the embodiments described above, in some other embodiments of the present invention, those skilled in the art may omit the setting of the counterweight component 4 as needed, and make the first cantilever 311 and the second cantilever 321 long enough, or set separate counterweight structures for the first cantilever 311 and the second cantilever 321.

[0056] Furthermore, although not shown in the figures, those skilled in the art will understand, in some other embodiments of the present invention, that the elastic support 3 may also be disposed inside the housing 1 as needed, compared to any of the embodiments described above. When the acoustic motor includes a counterweight 4, the counterweight 4 is also disposed inside the housing 1. Alternatively, those skilled in the art may, as needed, dispose of the main body of the elastic support 3 inside the housing 1 and extend a portion of the elastic support 3 to the outside of the housing 1, so that the counterweight 4 is disposed on the outside of the housing 1 and connected to that portion of the elastic support 3.

[0057] In addition, the present invention also provides an electric toothbrush, which includes a body, a brush head and a sonic motor as described in any of the preceding embodiments. The sonic motor is mounted on the body, and the rotating shaft 2 of the sonic motor is driven to drive the brush head to oscillate back and forth.

[0058] In addition, those skilled in the art can apply the sonic motor of the present invention to other feasible devices as needed, such as shavers, facial massagers, facial cleansing devices, etc.

[0059] The technical solutions of the present invention have been described in conjunction with several embodiments above. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Without departing from the technical principles of the present invention, those skilled in the art can disassemble and combine the technical solutions in the above embodiments, and can also make equivalent changes or substitutions to related technical features. Any changes, equivalent substitutions, improvements, etc., made within the technical concept and / or technical principles of the present invention will fall within the scope of protection of the present invention.

Claims

1.A sonic motor, comprising: a housing, a rotating shaft, at least a portion of which is located in the housing, the rotating shaft being able to swing in a circumferential direction thereof relative to the housing; a resilient support provided on the housing, the resilient support being used to absorb and / or counter at least a portion of vibration of the housing; the resilient support is provided on an outer side of the housing, and the resilient support comprises a first resilient support located at a first end of the housing and a second resilient support located at a second end of the housing; the first resilient support comprises at least two first cantilever arms; the second resilient support comprises at least two second cantilever arms; at least one counterweight member, each of the counterweight members being connected with at least one of the first cantilever arms and at least one of the second cantilever arms, respectively; wherein the first cantilever arms are connected together with the counterweight members through one end thereof away from the housing; the second cantilever arms are connected together with the counterweight members through one end thereof away from the housing; the counterweight members are slidingly connected with the first cantilever arms and the second cantilever arms in a radial direction of the rotating shaft, so as to adjust a distance between the counterweight members and the housing, thereby adjusting an amplitude of the counterweight members, and further making a vibration frequency of the counterweight members same as a vibration frequency of the housing and a vibration direction thereof opposite. 2.The sonic motor according to claim 1, wherein a number of the counterweight members is equal to a number of the first cantilever arms and a number of the second cantilever arms, respectively, each of the counterweight members is connected with one of the first cantilever arms and one of the second cantilever arms. 3.The sonic motor according to claim 1 or 2, wherein the counterweight members are provided in a rod-like structure, and a length direction of the counterweight members is parallel to an axial direction of the rotating shaft. 4.The sonic motor according to claim 1 or 2, wherein at least two of the first cantilever arms are centrally symmetric relative to a rotating shaft of the rotating shaft, and at least two of the second cantilever arms are centrally symmetric relative to the rotating shaft of the rotating shaft; and / or a swing center line of each of the first cantilever arms and each of the second cantilever arms is perpendicular to an axial line of the rotating shaft. 5.An electric toothbrush, comprising a main body, a brush head, and the sonic motor according to any one of claims 1 to 4, the sonic motor being mounted on the main body, the rotating shaft of the sonic motor being drivingly connected with the brush head, the rotating shaft being used to drive the brush head to swing back and forth.

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