CN219247617U

CN219247617U - Resonance device and electric toothbrush

Info

Publication number: CN219247617U
Application number: CN202223610331.6U
Authority: CN
Inventors: 曾梦伟; 魏宏敏; 李舟健
Original assignee: Shenzhen Sushi Technology Co Ltd
Current assignee: Shenzhen Sushi Technology Co Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-23
Anticipated expiration: 2032-12-30

Abstract

The utility model discloses a resonance device and an electric toothbrush, wherein the resonance device comprises a rotating shaft and a driving assembly at least partially arranged between a first flexible elastic piece and a second flexible elastic piece, the rotating shaft comprises a central node and a central line penetrating through the central node, the rotating shaft extends along the central line direction, the first flexible elastic piece and the second flexible elastic piece which are penetrated on the rotating shaft and are oppositely arranged at two sides of the central node along the central line direction are connected, the driving assembly is connected with at least one of the first flexible elastic piece and the second flexible elastic piece, and the driving assembly excites and drives the first flexible elastic piece and/or the second flexible elastic piece to rotate so as to reversely twist and resonate the first flexible elastic piece and the second flexible elastic piece, and the torque generated by resonance is basically counteracted at the central node. The resonance device has the advantages of simple structure, low cost and the like.

Description

Resonance device and electric toothbrush

Technical Field

The present utility model relates to personal care appliances, and in particular to a resonant device and an electric toothbrush.

Background

The electric toothbrush drives the spring through the motor to enable the brush head of the electric toothbrush to generate high-frequency vibration, and the toothpaste is instantaneously decomposed into fine foam to deeply clean the gaps between the teeth, so that the purpose of whitening the teeth is achieved.

In the related art, the internal structure of the electric toothbrush is unreasonable to be arranged, and the size of the internal structure is large.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent.

Therefore, the embodiment of the utility model provides the resonance device which is reasonable in internal structure and compact in size.

The embodiment of the utility model provides an electric toothbrush with low cost and simple structure.

The resonance device according to the embodiment of the utility model comprises: the rotating shaft comprises a central node and a central line passing through the central node, and the rotating shaft extends along the direction of the central line; the first flexible elastic piece and the second flexible elastic piece are arranged on the rotating shaft in a penetrating manner and are oppositely arranged on two sides of the center node along the direction of the central line; the driving assembly is at least partially arranged between the first flexible elastic piece and the second flexible elastic piece, and is connected with at least one of the first flexible elastic piece and the second flexible elastic piece; the driving assembly excites and drives the first flexible elastic element and/or the second flexible elastic element to rotate so as to enable the first flexible elastic element and the second flexible elastic element to reversely twist and resonate, and torque generated by resonance is basically counteracted at the center node.

According to the resonance device provided by the embodiment of the utility model, the driving assembly is arranged, the supporting seat between the first flexible elastic piece and the second flexible elastic piece is eliminated, the length of the resonance device is reduced, the resonance device is more compact, the redundant space can increase the length (namely the capacity) of a battery, and the cruising ability of the electric toothbrush is improved.

In some embodiments, at least one of the first flexible elastic member and the second flexible elastic member comprises a flexible spring and a mass block, one of the flexible spring and the mass block is provided with a protrusion, the other of the flexible spring and the mass block is provided with a groove, and the protrusion is arranged in the groove in a penetrating manner so that the flexible spring is connected with the mass block, and the rotating shaft is arranged in the flexible spring in a penetrating manner and drives the flexible spring to rotate.

In some embodiments, the flexible spring comprises: a spring body composed of a first connection portion having a first stiffness and an annular body having a second stiffness, wherein the annular body surrounds a closed-loop chamber along a circumference of the center line, the center line passing through a center point of the chamber; the first connecting portion having a first end operatively engaged with an inner peripheral surface of the annular body and a second end operatively engaged with an outer peripheral surface of the mounting portion, the first connecting portion extending in a radial direction of the center line; the mounting part is arranged in the cavity, a mounting hole penetrating through the mounting part along the central line direction is formed in the mounting part, and the rotating shaft penetrates through the mounting hole; the second connecting part comprises a first subsection which is integrally inserted with the annular body and a second subsection which protrudes from the end face of the annular body, and the protruding direction extends along the central line; when the mounting part circumferentially rotates along the central line, the spring body elastically deforms, so that the second connecting part resists the rotation of the mounting part; when the second connecting part circumferentially rotates along the central line, the spring body elastically deforms, so that the mounting part resists the rotation of the second connecting part.

In some embodiments, the drive assembly comprises: a stator assembly having at least one coil, the stator assembly further comprising a stator core having first and second stator cores extending in the direction of the center line and disposed opposite each other at intervals in a radial direction of the center line, and a third core disposed at an angle to the center line, the at least one coil being disposed on the third core around an outside of the third core; and a rotor assembly disposed between the first and second flexible elastic members, the rotor assembly including a first magnet assembly, a second magnet assembly, and a rotor bracket extending at least partially between the first and second stator cores, outer circumferential surfaces of the rotor bracket each being disposed in spaced relation to inner circumferential surfaces of the first and second stator cores along a radial direction of the center line, the first and second magnet assemblies being disposed on the rotor bracket in spaced relation to each other along the radial direction of the center line, at least a portion of the first and first magnet assemblies forming an air gap between end surfaces that are adjacent to each other, at least a portion of the second stator core and the second magnet assembly forming an air gap between end surfaces that are adjacent to each other, the rotor bracket being connected to at least one of the first and second flexible elastic members; the first magnet assembly and the second magnet assembly both comprise a first magnetization area and a second magnetization area with opposite magnetic poles, the first magnetization area of the first magnet assembly and the first magnetization area of the second magnet assembly are adjacently arranged at intervals when seen along the direction of the central line, and the second magnetization area of the first magnet assembly and the second magnetization area of the second magnet assembly are adjacently arranged at intervals.

In some embodiments, the rotor support is provided with a first hole penetrating the rotor support along the direction of the central line, the rotating shaft is rotatably penetrated in the first hole, and the outer peripheral surface of the rotating shaft and the inner peripheral surface of the first hole are arranged at intervals along the radial direction of the central line.

In some embodiments, the resonance device further includes a support base, one of the third iron core and the support base is disposed between the first flexible elastic member and the second flexible elastic member, the other of the third iron core and the support base is disposed at a side of the first flexible elastic member away from the second flexible elastic member, the support base is provided with a second hole extending along the direction of the center line, and one end of the rotating shaft is rotatably disposed in the second hole.

In some embodiments, the third iron core is disposed between the first flexible elastic member and the second flexible elastic member, the supporting seat is disposed on one side of the first flexible elastic member away from the second flexible elastic member, the third iron core includes a first section and a second section disposed along a radial interval of the central line, the coil includes a first portion and a second portion that are independent of each other, the first portion is wound on the first section, the second portion is wound on the second section, the first stator core is connected with the first section, the second stator core is connected with the second section, the rotating shaft is disposed between the first section and the second section and is disposed along a radial interval of the central line with the first section and the second section, the first section is connected with the first stator core, and the second section is connected with the second stator core.

In some embodiments, the third iron core is disposed on a side of the first flexible elastic element away from the second flexible elastic element, the rotor assembly and the first flexible elastic element are both disposed between the first stator iron core and the second stator iron core, the support base is disposed between the first flexible elastic element and the second flexible elastic element, and the first stator iron core and the second stator iron core are both disposed on the support base.

In some embodiments, the rotor assembly includes a first rotor assembly and a second rotor assembly, the first rotor assembly and the second rotor assembly are both rotatably disposed between the first stator core and the second stator core, the first rotor assembly and the second rotor assembly are both disposed with the first stator core and the second stator core along a radial interval of the center line, the first rotor assembly is connected with the first flexible elastic member, the second rotor assembly is connected with the second flexible elastic member, a rotation direction of the first rotor assembly is a first rotation direction, and the second rotor assembly is rotated in the center line along a direction opposite to the first rotation direction.

In some embodiments, the resonance device further comprises an output assembly, the output assembly comprises a mounting seat, an output shaft and a connecting piece, the mounting seat is arranged on the other side of the flexible elastic piece and is arranged with the flexible elastic piece at intervals along the direction of the central line, the mounting seat is provided with a third hole penetrating through the mounting seat along the direction of the central line, the connecting piece is connected with the flexible elastic piece, the output shaft extends along the direction of the central line and the central line of the output shaft is collinear with the central line of the output shaft, one end of the output shaft is operatively engaged with the connecting piece, the other end of the output shaft is arranged in the third hole in a penetrating manner, and the outer peripheral surface of the output shaft and the inner peripheral surface of the third hole are arranged at intervals along the radial direction of the central line.

According to an embodiment of the utility model the electric toothbrush of (2) comprises: a housing having a chamber; a resonance device provided in the chamber, the resonance device being any one of the above embodiments, an outer peripheral surface of the resonance device and an inner peripheral surface of the housing being disposed at a radial interval along a center line of the resonance device; and one end of the cleaning component is arranged in the shell and is connected with the resonance device, so that resonance generated by the resonance device is transmitted to the cleaning component.

Drawings

Fig. 1 is a schematic structural view of a resonance apparatus according to a first embodiment of the present utility model.

Fig. 2 is a front cross-sectional view of fig. 1.

Fig. 3 is an exploded view of a resonance apparatus of a first embodiment of the present utility model.

Fig. 4 is a schematic structural view of a resonance apparatus according to a second embodiment of the present utility model.

Fig. 5 is a front cross-sectional view of fig. 4.

Fig. 6 is an exploded view of a resonance apparatus according to a second embodiment of the present utility model.

Fig. 7 is a schematic structural view of a resonance apparatus according to a third embodiment of the present utility model.

Fig. 8 is a front cross-sectional view of fig. 7.

Fig. 9 is an exploded view of a resonance apparatus according to a third embodiment of the present utility model.

Fig. 10 is a schematic structural view of a resonance apparatus according to a fourth embodiment of the present utility model.

Fig. 11 is a front cross-sectional view of fig. 10.

Fig. 12 is an exploded view of a resonance apparatus according to a fourth embodiment of the present utility model.

Fig. 13 is a schematic structural view of a first flexible elastic member of the resonance apparatus of the present utility model.

A resonance device 100;

a rotating shaft 1; a center line 11;

a first flexible elastic member 2; a flexible spring 21; a protrusion 211; a mass 22; a groove 221; an annular body 23; a first connection portion 24; a mounting portion 25; a second connection portion 26;

a second flexible elastic member 3;

A drive assembly 4; a stator assembly 41; a first stator core 411; a second stator core 412; a third iron core 413; a first section 4131; a second section 4132; a coil 414; a first portion 4141; a second portion 4142;

a rotor assembly 42; a first magnet assembly 421; a second magnet assembly 422; a rotor holder 423; a first rotor assembly 43; a second rotor assembly 44;

a support base 5;

an output assembly 6; a mounting base 61; an output shaft 62; a connecting member 63; bearing 64

A housing 7.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

An electric toothbrush according to an embodiment of the present utility model is described below with reference to the accompanying drawings.

As shown in fig. 1-13, the electric toothbrush of the embodiment of the present utility model includes a housing 7, a resonant device 100 disposed within the chamber, and a cleaning assembly (not shown).

The housing 7 has a chamber (not shown in the drawings), and the resonance device 100 includes a rotating shaft 1, a first flexible elastic member 2 and a second flexible elastic member 3 penetrating the rotating shaft 1 and disposed opposite to each other along a direction of a center line 11 at both sides of a center node, and a driving assembly 4 at least partially disposed between the first flexible elastic member 2 and the second flexible elastic member 3.

The rotary shaft 1 includes a center node and a center line 11 passing through the center node, and the rotary shaft 1 extends in the direction of the center line 11 (left-right direction as viewed in fig. 1). Specifically, as shown in fig. 1 to 12, the rotating shaft 1 extends in the left-right direction, the rotating shaft 1 has a center node, the rotating shaft 1 is symmetrical along the center node, the first flexible elastic member 2 and the second flexible elastic member 3 are all arranged on the rotating shaft 1 in a penetrating manner and are arranged at intervals in the left-right direction, the first flexible elastic member 2 is located on the right side of the center node, the second flexible elastic member 3 is located on the left side of the center node, and the first flexible elastic member 2 and the second flexible elastic member 3 are symmetrical about the center node.

The drive assembly 4 is connected to at least one of the first 2 and second 3 flexible elastic members. In particular, as shown in fig. 1 to 12, the driving assembly 4 is disposed in the housing 7, at least part of the driving assembly 4 is located between the first flexible elastic member 2 and the second flexible elastic member 3, and the driving assembly 4 may be disposed according to practical situations, for example: the driving assembly 4 is connected with the first flexible elastic member 2, or the driving assembly 4 is connected with the second flexible elastic member 3, or the driving assembly 4 is connected with both the first flexible elastic member 2 and the second flexible elastic member 3.

The outer peripheral surface of the resonance device 100 and the inner peripheral surface of the housing 7 are disposed at intervals in the radial direction of the center line 11 of the resonance device 100. Specifically, the outer peripheral surface of the first flexible elastic element 2 and the outer peripheral surface of the second flexible elastic element 3 are arranged at intervals along the inner and outer directions with the inner peripheral surface of the shell 7, so that the first flexible elastic element 2 and the second flexible elastic element 3 are prevented from being bumped and ground with the inner peripheral surface of the shell 7 during rotation, and the service lives of the first flexible elastic element 2, the second flexible elastic element 3 and the shell 7 are ensured.

One end of the cleaning assembly is disposed in the housing 7 and connected to the resonance device 100 so that resonance generated by the resonance device 100 is transmitted to the cleaning assembly. Specifically, the cleaning component is a brush head, and the right end of the cleaning component is penetrated in the housing 7 and connected with the second flexible elastic member 3, so that resonance energy generated by the resonance device 100 is transferred to the cleaning component.

The driving assembly 4 excites and drives the first flexible elastic member 2 and/or the second flexible elastic member 3 to rotate so as to enable the first flexible elastic member 2 and the second flexible elastic member 3 to reversely and torsionally resonate, and torque generated by resonance is basically counteracted at a central node. Therefore, when the driving component 4 drives the first flexible elastic element 2, or the driving component 4 drives the second flexible elastic element 3 to rotate, or the driving component 4 drives the first flexible elastic element 2 and the second flexible elastic element 3 to rotate respectively, the first flexible elastic element 2 and the second flexible elastic element 3 can be made to reversely rotate and resonate, in other words, the first flexible elastic element 2 rotates clockwise, the second flexible elastic element 3 rotates anticlockwise, or the first flexible elastic element 2 rotates anticlockwise, the second flexible elastic element 3 rotates clockwise, so that the first flexible elastic element 2 and the second flexible elastic element 3 generate resonance, the torque of the first flexible elastic element 2 and the second flexible elastic element 3 is basically counteracted at the central node, and resonance energy is transferred to the cleaning component.

According to the resonance device 100 of the embodiment of the utility model, at least part of the driving component 4 is arranged between the first flexible elastic element 2 and the second flexible elastic element 3 and is connected with one of the first flexible elastic element 2 and the second flexible elastic element 3, so that the driving component 4 can drive the first flexible elastic element 2 or the driving component 4 can drive the second flexible elastic element 3 according to the driving force, or the driving component 4 can drive the first flexible elastic element 2 and the second flexible elastic element 3 simultaneously, thereby the resonance device 100 is more reasonable to arrange, in addition, a supporting element is not required to be arranged between the first flexible elastic element 2 and the second flexible elastic element 3, the supporting seat 5 between the first flexible elastic element 2 and the second flexible elastic element 3 is omitted, the length of the resonance device 100 is reduced, the resonance device 100 is more compact, the redundant space can increase the length (i.e. the capacity) of a battery, and the endurance of the electric toothbrush is improved.

In some embodiments, at least one of the first flexible elastic member 2 and the second flexible elastic member 3 includes a flexible spring 21 and a mass 22, one of the flexible spring 21 and the mass 22 is provided with a protrusion 211, the other of the flexible spring 21 and the mass 22 is provided with a groove 221, the protrusion 211 is inserted into the groove 221 so that the flexible spring 21 is connected with the mass 22, and the rotating shaft 1 is inserted into the flexible spring 21 and drives the flexible spring 21 to rotate. Specifically, as shown in fig. 1 to 13, the mass block 22 may be a rectangular block, a circular block, an elliptical block, a polygonal block, or the like, and the protrusions 211 and the grooves 221 may be provided according to actual conditions, for example: the mass block 22 is provided with a groove 221, the flexible spring 21 is provided with a protrusion 211, or the mass block 22 is provided with a protrusion 211, the flexible spring 21 is provided with a groove 221, in the embodiment of the utility model, the mass block 22 is provided with a groove 221, the flexible spring 21 is provided with a protrusion 211, the mass block 22 and the flexible spring 21 are sequentially arranged along the left-right direction, the mass block 22 and the flexible spring 21 are all arranged on the rotating shaft 1 in a penetrating way, one side of the mass block 22, facing the flexible spring 21, is provided with a groove 221 matched with the flexible spring 21, and one side of the flexible spring 21, facing the mass block 22, is provided with a protrusion 211, so that the mass block 22 of the flexible spring 21 is connected, and in addition, the resonance frequency of the resonance device 100 is adjusted through the weight, the size and the structure of the mass block 22.

In some embodiments, the flexible spring 21 includes an annular body 23, a mounting portion 25 disposed within the chamber, a first connecting portion 24 having flexibility, and a second connecting portion 26.

The annular body 23 forms a closed-loop chamber circumferentially around the centre line 11, the centre line 11 passing through the centre point of the chamber. Specifically, as shown in fig. 13, the annular body 23 is a flexible material, and the annular body 23 may be any of a circular ring shape, a polygonal shape, an elliptical shape, or the like, the annular body 23 having an outer peripheral surface and an inner peripheral surface in the radial direction of the center line 11, the center line of the chamber of the annular body 23 coinciding with the center line 11.

The first connecting portion 24 has a first end operatively engaged with the inner peripheral surface of the annular body 23, and a second end operatively engaged with the outer peripheral surface of the mounting portion 25, the first connecting portion 24 extending in a radial direction (an inner-outer direction as shown in fig. 1) of the center line 11. Specifically, as shown in fig. 13, the first connecting portion 24 is provided between the mounting portion 25 and the annular body 23, the first connecting portion 24 is elongated as viewed from the direction of the centerline 11, one end of the first connecting portion 24 is connected to the inner peripheral surface of the annular body 23, the other end of the first connecting portion 24 is connected to the outer peripheral surface of the mounting portion 25, thereby connecting the mounting portion 25 and the annular body 23 by the first connecting portion 24, and the first connecting portion 24 is a flexible material, and the mounting portion 25 rotates relative to the annular body 23 by the first connecting portion 24.

The mounting portion 25 is provided with a mounting hole (not shown) penetrating the mounting portion 25 along the center line 11, and the rotating shaft 1 is inserted into the mounting hole. Specifically, as shown in fig. 13, the mounting portion 25 includes, but is not limited to, a rectangular block, a cylindrical block, an elliptic cylindrical block, a polygonal block, etc., the mounting portion 25 is provided in the chamber, and the outer peripheral surface of the mounting portion 25 and the inner peripheral surface of the annular body 23 are disposed at intervals in the radial direction of the center line 11, a mounting hole penetrating the mounting portion 25 in the left-right direction is provided in the mounting portion 25, and the rotation shaft 1 may pass through the mounting hole so as to rotate the mounting portion 25, preferably, the axis of the mounting hole coincides with the center line 11.

The second connecting portion 26 includes a first sub-section integrally inserted into the annular body 23, and a second sub-section protruding 211 on an end surface of the annular body 23, and the protruding 211 extends along the center line 11. Specifically, as shown in fig. 1, a second connecting portion 26 extending in the left-right direction is provided on a side of the annular body 23 facing the mass 22, a first subsection of the second connecting portion 26 is provided on the annular body 23 and is the protrusion, a second subsection of the second connecting portion 26 is provided at one end of the first subsection and is inserted into the mass 22, and the second subsection is a cylinder, such as a cylinder or a polygonal cylinder, so as to be connected with the mass 22 of the electric toothbrush through the second connecting portion 26.

When the mounting portion 25 of the flexible spring 21 is excited to rotate, the annular body 23 is elastically deformed, so that the second connecting portion 26 resists the rotation of the mounting portion 25, and resonance of the resonance device 100 is realized; or, when the mass 22 is excited to rotate, the annular body 23 is elastically deformed, so that the mounting portion 25 resists the rotation of the second connecting portion 26, and resonance of the resonance device 100 is achieved. Specifically, as shown in fig. 1-2, the driving component 4 drives the mass block 22 of the second flexible elastic element 3 to rotate so as to drive the annular body 23 of the flexible spring 21 of the second flexible elastic element 3 to rotate, the annular body 23 of the flexible spring 21 of the second flexible elastic element 3 drives the mounting portion 25 of the flexible spring 21 of the second flexible elastic element 3 to rotate, the mounting portion 25 of the flexible spring 21 of the second flexible elastic element 3 drives the rotating shaft 1 to rotate, the rotating shaft 1 drives the mounting portion 25 of the flexible spring 21 of the first flexible elastic element 2 to drive the annular body 23 of the flexible spring 21 of the first flexible elastic element 2 to rotate, and drives the mass block 22 of the first flexible elastic element 2 to rotate, so that the flexible spring 21 of the second flexible elastic element 3 and the flexible spring 21 of the first flexible elastic element 2 resonate, finally, the toothbrush component is driven by the mass block 22 of the first flexible elastic element 2 to resonate, and the rotation amplitude of the mounting portion 25 is smaller than that of the annular body 23 in the resonance state.

It should be noted that: the first connecting portion 24 is a main spring, the annular body 23 is an auxiliary spring, the first connecting portion 24 and the annular body 23 together form a spring body, when the mounting portion 25 rotates along the direction R1 in the circumferential direction of the center line 11, the annular body 23 deforms, the second rigidity of the first connecting portion 24 and the first rigidity of the annular body 23 enable the second connecting portion 26 to resist rotation of the mounting portion 25 along the direction R1, or when the second connecting portion 26 rotates along the direction R2 in the circumferential direction of the center line 11, the annular body 23 deforms, and the second rigidity of the first connecting portion 24 and the first rigidity of the annular body 23 enable the mounting portion 25 to resist rotation of the second connecting portion 26 along the direction R2. Wherein the R1 direction and the R2 direction may be the same or opposite.

In some embodiments, the drive assembly 4 includes a stator assembly 41 having at least one coil 414 and a rotor assembly 42 disposed between the first 2 and second 3 flexible elastic members.

The stator assembly 41 further includes a stator core having a first stator core 411 and a second stator core 412 extending in the direction of the center line 11 and disposed opposite to each other at intervals in the radial direction of the center line 11, and a third core 413 disposed at an angle to the center line 11, at least one coil 414 being disposed on the third core 413 around the outside of the third core 413.

Specifically, as shown in fig. 1 to 12, the first stator core 411 and the second stator core 412 each extend in the left-right direction, the third core 413, the first stator core 411 and the second stator core 412 are each provided in the housing 7, the right end of the first stator core 411 is fixed at the upper end of the third core 413, the right end of the second stator core 412 is fixed at the lower end of the third core 413, and the coil 414 is wound on the third core 413, so that the first stator core 411 and the second stator core 412 are oppositely disposed at intervals in the up-down direction, so that the third core 413, the coil 414, the first stator core 411 and the second stator core 412 form the stator assembly 41.

The rotor assembly 42 includes a first magnet assembly 421, a second magnet assembly 422, and a rotor support 423 at least partially extending between the first stator core 411 and the second stator core 412, outer circumferential surfaces of the rotor support 423 are each disposed with an inner circumferential surface of the first stator core 411, an inner circumferential surface of the second stator core 412 being spaced apart in a radial direction of the center line 11, the first magnet assembly 421 and the second magnet assembly 422 being disposed on the rotor support 423 opposite to each other in the radial direction of the center line 11, at least a portion of the first stator core 411 and the first magnet assembly 421 forming an air gap between end surfaces close to each other, at least a portion of the second stator core 412 and the second magnet assembly 422 forming an air gap between end surfaces close to each other, the rotor support 423 being connected to at least one of the first flexible elastic member 2 and the second flexible elastic member 3. Specifically, as shown in fig. 1 to 12, the rotor support 423 is disposed between the first flexible elastic member 2 and the second flexible elastic member 3, the rotor support 423 is cylindrical and rotatably mounted between the left end portion of the first stator core 411 and the left end portion of the second stator core 412, and the inner circumferential surface of the first stator core 411 and the inner circumferential surface of the second stator core 412 are spaced from the outer circumferential surface of the rotor support 423 to form an air gap, so as to prevent the rotor support 423 from rubbing against the first stator core 411 and the second stator core 412 when rotating, thereby improving the service lives of the rotor support 423, the first stator core 411 and the second stator core 412, and in addition, the rotor support 423 may be connected to the first flexible elastic member 2 and the second flexible elastic member 3 according to actual needs, for example: the rotor support 423 is connected to the mass 22 of the first flexible elastic member 2, or the rotor support 423 is connected to the mass 22 of the second flexible elastic member 3, or both the mass 22 of the first flexible elastic member 2 and the mass 22 of the second flexible elastic member 3 are connected to the rotor support 423.

It should be understood that the connection manner of the mass 22 and the rotor support 423 is not limited in the embodiment of the present utility model, for example: the rotor support 423 and the mass 22 may be integrally formed, or the rotor support 423 and the mass 22 may be connected by adhesion, or the rotor support 423 and the mass 22 may be connected by insertion, or the like.

The first magnet assembly 421 and the second magnet assembly 422 each include a first magnetization region and a second magnetization region having opposite magnetic poles, and the first magnetization region of the first magnet assembly 421 and the first magnetization region of the second magnet assembly 422 are disposed at adjacent intervals when viewed along the direction of the center line 11, and the second magnetization region of the first magnet assembly 421 and the second magnetization region of the second magnet assembly 422 are disposed at adjacent intervals. Specifically, as shown in fig. 1 to 12, the upper end and the lower end of the rotor support 423 are both provided with a mating groove, the first magnet assembly 421 is provided in the mating groove of the upper end of the rotor support 423, the second magnet assembly 422 is provided in the mating groove of the lower end of the rotor support 423, the outer circumferential surface of the first magnet assembly 421 and the inner circumferential surface of the first stator core 411 are disposed opposite to each other in the vertical direction at intervals, the outer circumferential surface of the second magnet assembly 422 and the inner circumferential surface of the second stator core 412 are disposed opposite to each other in the vertical direction at intervals, the first magnet assembly 421 and the second magnet assembly 422 each include a first magnetization region and a second magnetization region having opposite magnetic poles, for example, the first magnetization region is an N pole, the second magnetization region is an S pole, or the first magnetization region is an S pole, the second magnetization region is an N pole, in other words, the first magnet assembly 421 and the second magnet assembly 422 each include at least two permanent magnets, and the two permanent magnets are disposed in the mating groove and face away from the mating groove. The first magnetization region of the first magnet assembly 421 and the first magnetization region of the second magnet assembly 422 are disposed opposite to each other at an interval in the inner-outer direction, and the second magnetization region of the first magnet assembly 421 and the second magnetization region of the second magnet assembly 422 are disposed opposite to each other at an interval in the inner-outer direction. Therefore, when the coil 414 is electrified, the first stator core 411 and the second stator core 412 generate opposite magnetic poles, and the first magnetization region and the second magnetization region are driven to drive the rotor support 423 to rotate reciprocally around the shaft with a certain swing angle. Therefore, at least part of the first stator core 411 and the first magnet assembly 421 are arranged in a pair along the inner and outer direction at intervals, and at least part of the second stator core 412 and the second magnet assembly 422 are arranged in a pair along the inner and outer direction at intervals, so that unilateral magnetic pulling force generated by the first magnet assembly 421 and the second magnet assembly 422 in the left and right directions can be eliminated, the output stability of the resonance device 100 is improved, and vibration and noise of the resonance device 100 during operation are reduced.

In some embodiments, the rotor support 423 is provided with a first hole (not shown) penetrating the rotor support 423 in the direction of the center line 11, the rotating shaft 1 is rotatably penetrated in the first hole, and the outer circumferential surface of the rotating shaft 1 and the inner circumferential surface of the first hole are disposed at intervals in the radial direction of the center line 11. Specifically, as shown in fig. 1 to 12, the rotor support 423 is provided with a first hole penetrating the rotor support 423 in the left-right direction, the rotating shaft 1 is penetrated in the first hole of the rotor support 423, the rotation of the sub support 423 and the rotation of the rotating shaft 1 do not affect each other, and the first hole of the rotor support 423 and the rotation of the rotating shaft 1 are arranged at intervals in the inner-outer direction, so that the rotor support 423 is prevented from affecting the rotation of the rotating shaft 1.

In some embodiments, the resonance device 100 further includes a support seat 5, one of the third iron core 413 and the support seat 5 is disposed between the first flexible elastic member 2 and the second flexible elastic member 3, the other of the third iron core 413 and the support seat 5 is disposed at a side of the first flexible elastic member 2 away from the second flexible elastic member 3, the support seat 5 is provided with a second hole (not illustrated) extending along the direction of the center line 11, and one end of the rotating shaft 1 is rotatably disposed in the second hole. Specifically, as shown in fig. 1 to 12, the supporting seat 5 and the third iron core 413 may be configured according to practical situations, for example: the third iron core 413 is arranged between the first flexible elastic element 2 and the second flexible elastic element 3, the supporting seat 5 is arranged on the right side of the first flexible elastic element 2, the second hole can be a blind hole, the right end of the rotating shaft 1 is arranged in the second hole in a penetrating manner, the outer peripheral surface of the rotating shaft 1 and the inner peripheral surface of the second hole are arranged at intervals along the inner and outer directions, the right end of the rotating shaft 1 rotates in the second hole, the second hole not only provides support for the rotating shaft 1 and prevents the rotating shaft 1 from bending, but also limits the rotating shaft 1 from larger jumping in the circumferential direction of the central line 11, so that the stability of the resonance device 100 is ensured, or the supporting seat 5 is arranged between the first flexible elastic element 2 and the second flexible elastic element 3, the third iron core 413 is arranged on the right side of the first flexible elastic element 2, the second hole is a through hole, the rotating shaft 1 passes through the second hole and is arranged with the inner peripheral surface of the second hole at intervals along the inner and outer directions, the right end of the first stator iron core 411 and the right end of the second stator iron core 412 are connected with the third iron core 413, and the rotor assembly 42 is rotatably arranged between the first stator iron core 412 and the second stator iron core 412.

In some embodiments, the third core 413 is disposed between the first flexible elastic member 2 and the second flexible elastic member 3, the support seat 5 is disposed on a side of the first flexible elastic member 2 away from the second flexible elastic member 3, the third core 413 includes a first segment 4131 and a second segment 4132 disposed at intervals along a radial direction of the center line 11, the coil 414 includes a first portion 4141 and a second portion 4142 independent from each other, the first portion 4141 is wound around the first segment 4131, the second portion 4142 is wound around the second segment 4132, the first stator core 411 is connected to the first segment 4131, the second stator core 412 is connected to the second segment 4132, the rotating shaft 1 is disposed between the first segment 4131 and the second segment 4132 and is disposed at intervals along the radial direction of the center line 11, the first segment 4131 is connected to the first stator core 411, and the second segment 4132 is connected to the second stator core 412. Specifically, as shown in fig. 1 to 9, the first segment 4131 and the second segment 4132 are disposed at intervals in the inner and outer directions, the first portion 4141 is wound around the first segment 4131, the second segment 4142 is wound around the second segment 4132, the rotating shaft 1 rotatably passes through the first portion 4141 and the second portion 4142, and the first portion 4141 and the second portion 4142 are disposed at intervals in the inner and outer directions with respect to the outer circumferential surface of the rotating shaft 1, so that the rotating shaft 1 is prevented from rubbing against the first portion 4141 and the second portion 4142 during rotation, the first stator core 411 is connected to the first segment 4131, and the second stator core 412 is connected to the second segment 4132, whereby, when the third core 413 is located between the first flexible elastic member 2 and the second flexible elastic member 3, the third core 413 can be prevented from affecting the rotation of the rotating shaft 1, and the third core 413 can be more reasonably disposed.

In some embodiments, the third iron core 413 is disposed on a side of the first flexible elastic member 2 away from the second flexible elastic member 3, the rotor assembly 42 and the first flexible elastic member 2 are both located between the first stator iron core 411 and the second stator iron core 412, the supporting seat 5 is disposed between the first flexible elastic member 2 and the second flexible elastic member 3, and the first stator iron core 41 and the second stator iron core 41 are both disposed on the supporting seat 5. Specifically, as shown in fig. 10 to 12, the first stator core 411 and the second stator core 412 extend from right to left to the left of the center node, and the first flexible elastic member 2 is located between the first stator core 411 and the second stator core 412 and is disposed at intervals along the inner and outer directions with the first stator core 411 and the second stator core 412, so that the first flexible elastic member 2 is prevented from being connected to the first stator core 411 and the second stator core 412 and from being bumped and worn, and the rotor assembly 42 is rotatably disposed in the left end portions of the first stator core 411 and the second stator core 412 and is connected to at least one of the first flexible elastic member 2 and the second flexible elastic member 3, and since the size of the support seat 5 in the left-right direction is smaller than the size of the coil 414 in the left-right direction, the structure of the first flexible elastic member 2 and the second flexible elastic member 3 is more compact, and the mechanical transmission efficiency is improved.

In some embodiments, the rotor assembly 42 includes a first rotor assembly 43 and a second rotor assembly 44, where the first rotor assembly 43 and the second rotor assembly 44 are rotatably disposed between the first stator core 411 and the second stator core 412, the first rotor assembly 43 and the second rotor assembly 44 are disposed with the first stator core 411 and the second stator core 412 at radial intervals along the center line 11, the first rotor assembly 43 is connected to the first flexible elastic member 2, the second rotor assembly 44 is connected to the second flexible elastic member 3, the rotation direction of the first rotor assembly 43 is a first rotation direction, and the second rotor assembly 44 rotates in a direction opposite to the first rotation direction at the center line 11. Specifically, as shown in fig. 7 to 12, the first rotor assembly 43 drives the first flexible elastic member 2 to rotate clockwise, the second rotor assembly 44 drives the second flexible elastic member 3 to rotate counterclockwise, or the first rotor assembly 43 drives the first flexible elastic member 2 to rotate counterclockwise, and the second rotor assembly 44 drives the second flexible elastic member 3 to rotate clockwise, so that the first flexible elastic member 2 and the second flexible elastic member 3 resonate.

In some embodiments, the resonance device 100 further includes the output assembly 6, the output assembly 6 includes a mounting seat 61, an output shaft 62, and a connecting member 63, the mounting seat 61 is disposed on the other side of the flexible spring 21 assembly and is spaced from the flexible spring 21 assembly along the direction of the central line 11, the mounting seat 61 is provided with a third hole (not illustrated in the drawing) penetrating the mounting seat 61 along the direction of the central line 11, the connecting member 63 is connected to the flexible spring 21 assembly, the output shaft 62 extends along the direction of the central line 11 and the central line 11 is collinear with the central line 11 of the output shaft 62, one end of the output shaft 62 is operatively engaged with the connecting member 63, the other end of the output shaft 62 is disposed in the third hole in a penetrating manner, and the outer circumferential surface of the output shaft 62 and the inner circumferential surface of the third hole are disposed along the radial interval of the central line 11. Specifically, as shown in fig. 1-12, the mounting seat 61 is fixed in the housing 7 and is located at the left side of the second flexible elastic member 3, the mounting seat 61 is provided with a third hole penetrating the mounting seat 61 along the left-right direction, the output shaft 62 is an output shaft 62 and extends along the left-right direction, the connecting member 63 is an elliptical connecting block, a circular connecting block, a polygonal connecting block and the like, the connecting member 63 is located between the mounting seat 61 and the second flexible elastic member 3, and the mounting seat 61, the connecting member 63 and the second flexible elastic member 3 are sequentially arranged at intervals along the left-right direction, the right end of the output shaft 62 passes through the third hole and is fixed with the connecting member 63, and the right end of the connecting member 63 is connected with the mass block 22 of the second flexible elastic member 3, so that the connecting member 63, the output shaft 62 and the mass block 22 of the second flexible elastic member 3 are mounted together, the outer ring of the bearing 64 is fixed in the third hole, the right end of the output shaft 62 is penetrated in the inner ring of the bearing 64, the left end of the output shaft 62 is connected with the cleaning assembly, and the output shaft 62 is supported on the mounting seat 61 through the bearing 64, thereby the output shaft 62 is lifted, the bending stiffness and the output shaft is increased, the load and the load is reduced, and the load is reduced.

The following specifically describes a resonance apparatus 100 of an embodiment of the present utility model.

The first flexible elastic member 2 and the second flexible elastic member 3 both comprise a flexible spring 21 and a mass block 22, the flexible spring 21 and the mass block 22 are mounted together in a matched manner through a protrusion 211 and a groove 221, the rotating shaft 1 penetrates through a mounting hole of the flexible spring 21, so that the rotating shaft 1 and the first flexible elastic member 2 and the second flexible elastic member 3 are assembled together to rotate, the mass block 22 is not matched with the rotating shaft 1, and the movement of the mass block 22 and the movement of the rotating shaft 1 are not affected mutually.

Embodiment one: as shown in fig. 1-3, the driving component 4 is disposed between the first flexible elastic member 2 and the second flexible elastic member 3, the rotor component 42 is one and is provided with a protruding portion, the mass block 22 of the first flexible elastic member 2 is provided with a matching groove matched with the protruding portion, and the protruding portion can be arranged in the matching groove on the mass block 22 of the first flexible elastic member 2 in a penetrating manner, so that the first flexible elastic member 2 is driven to rotate by the rotor component 42, the first flexible elastic member 2 drives the rotating shaft 1 to rotate, and the rotating shaft 1 drives the second flexible elastic member 3 to rotate, so that the first flexible elastic member 2 and the second flexible elastic member 3 resonate.

Embodiment two: as shown in fig. 4-6, the driving component 4 is disposed between the first flexible elastic member 2 and the second flexible elastic member 3, the rotor component 42 is one and is provided with a protruding portion, the mass block 22 of the second flexible elastic member 3 is provided with a matching groove matched with the protruding portion, and the protruding portion can be arranged in the matching groove on the mass block 22 of the second flexible elastic member 3 in a penetrating manner, so that the second flexible elastic member 3 is driven to rotate by the rotor component 42, the second flexible elastic member 3 drives the rotating shaft 1 to rotate, and the rotating shaft 1 drives the first flexible elastic member 2 to rotate, so that the first flexible elastic member 2 and the second flexible elastic member 3 resonate.

Embodiment III: as shown in fig. 7 to 9, the driving assembly 4 is disposed between the first flexible elastic member 2 and the second flexible elastic member 3, the first stator core 411 includes a first plate and a second plate, the second stator core 412 includes a third plate and a fourth plate, the third core 413 includes a first segment 4131 and a second segment 4132 disposed at intervals along a radial direction of the center line 11, the first plate is connected to the first segment 4131, the second plate is connected to the second segment 4132, the first plate and the second plate are disposed opposite to each other in an up-down direction, the third plate and the fourth plate are disposed opposite to each other in an up-down direction, and the rotor assemblies 42 are two first rotor assemblies 43 and second rotor assemblies 44, respectively, the first rotor assemblies 43 and the second rotor assemblies 44 are each provided with a protrusion, the mass blocks 22 of the first flexible elastic member 2 and the mass blocks 22 of the second flexible elastic member 3 are provided with a fitting groove to be fitted with the protrusion, the protruding part of the first rotor component 43 can be penetrated in the matching groove on the mass block 22 of the first flexible elastic element 2, the protruding part of the second rotor component 44 can be penetrated in the matching groove on the mass block 22 of the second flexible elastic element 3, the first rotor component 43 is arranged between the first plate and the second plate and is arranged at intervals along the up-down direction with the first plate and the second plate, the second rotor component 44 is arranged between the third plate and the fourth plate and is arranged at intervals along the up-down direction with the third plate and the fourth plate, thereby the first flexible elastic element 2 is driven to rotate clockwise through the first rotor component 43, the second flexible elastic element 3 is driven to rotate anticlockwise through the second rotor component 44, or the second flexible elastic element 3 is driven to rotate clockwise through the second rotor component 44, the first rotor component 43 drives the first flexible elastic element 2 to rotate anticlockwise, so that the first flexible elastic member 2 and the second flexible elastic member 3 resonate.

Embodiment four: the rotor assembly 42 and the supporting seat 5 of the driving assembly 4 are arranged between the first flexible elastic element 2 and the second flexible elastic element 3, the third iron core 413 is arranged on the right side of the first flexible elastic element 2, the right end of the first stator iron core 411 and the right end of the second stator iron core 412 are connected with the third iron core 413, the first stator iron core 411 and the second stator iron core 412 extend leftwards and are arranged on the supporting seat 5, so that the first flexible elastic element 2 is arranged between the first stator iron core 411 and the second stator iron core 412 and is arranged with the first stator iron core 411 and the second stator iron core 412 along the vertical direction at intervals, the rotor assembly 42 is arranged between the first flexible elastic element 2 and the supporting seat 5, a convex part is arranged on the mass block 22 of the first flexible elastic element 2, the convex part can be arranged in the matching groove on the mass block 22 of the first flexible elastic element 2 in a penetrating way, and accordingly the first flexible element 2 is driven by the supporting seat 5, the first flexible element 2 is driven by the rotor assembly 42 to rotate, the first flexible element 1 and the second flexible element 2 are driven by the first flexible element 1 and the second flexible element 3 to rotate, and the first flexible element 1 and the second flexible element 3 are driven to rotate, and the first flexible element 2 is driven to rotate, and the first flexible element is driven by the flexible element and the flexible element 2.

Fifth embodiment: the rotor assembly 42 and the supporting seat 5 of the driving assembly 4 are arranged between the first flexible elastic element 2 and the second flexible elastic element 3, the third iron core 413 is arranged on the right side of the first flexible elastic element 2, the right end of the first stator iron core 411 and the right end of the second stator iron core 412 are connected with the third iron core 413, the first stator iron core 411 and the second stator iron core 412 extend leftwards and are arranged on the supporting seat 5, the first flexible elastic element 2 is arranged between the first stator iron core 411 and the second stator iron core 412 and is arranged with the first stator iron core 411 and the second stator iron core 412 along the vertical direction at intervals, the rotor assembly 42 is arranged between the second flexible elastic element 3 and the supporting seat 5, a convex part is arranged on the mass block 22 of the second flexible elastic element 3, and can be arranged in the matching groove on the mass block 22 of the second flexible elastic element 3 in a penetrating way, so that the second flexible element 3 is driven by the rotor assembly 42, the second flexible element 3 is driven to rotate, the second flexible element 1 and the second flexible element 2 is driven to rotate, and the first flexible element 1 and the second flexible element 2 are driven to rotate, and the first flexible element 2 is driven to rotate, and the second flexible element 2 is driven to rotate.

Example six: as shown in fig. 10-12, the rotor assembly 42 and the supporting seat 5 of the driving assembly 4 are arranged between the first flexible elastic member 2 and the second flexible elastic member 3, the third iron core 413 is arranged at the right side of the first flexible elastic member 2, the right end of the first stator iron core 411 and the right end of the second stator iron core 412 are both connected with the third iron core 413, and the first stator iron core 411 and the second stator iron core 412 extend leftwards and are arranged on the supporting seat 5, so that the supporting seat 5 supports the first stator iron core 411 and the second stator iron core 412, the first flexible elastic member 2 is positioned between the first stator iron core 411 and the second stator iron core 412 and is arranged with the first stator iron core 411 and the second stator iron core 412 along the up-down direction, the rotor assembly 42 is two first rotor assembly 43 and the second rotor assembly 44 respectively, the first rotor assembly 43 and the second rotor assembly 44 are positioned between the second flexible elastic member 3 and the supporting seat 5, the first rotor assembly 43 and the second rotor assembly 44 are provided with a bulge part, the mass block 22 of the first flexible elastic member 2 and the second flexible member 22 are arranged on the second rotor assembly 2, the bulge part 22 is matched with the first rotor assembly 2 and the second rotor assembly 2, the first rotor assembly 43 is driven by the first rotor assembly 2 and the second rotor assembly 2, the bulge part 43 is driven by the first rotor assembly 2, the first rotor assembly 43 and the second rotor assembly 44 is driven by the first rotor assembly 2, the bulge part is driven by the first rotor assembly 2 and the bulge part 22 and the second flexible assembly 2, the bulge part 43 is driven by the first rotor assembly 2 and the bulge part 2, and the bulge part 43 is driven by the first rotor assembly 43 and the second flexible assembly 43 and the second rotor assembly 44, and the bulge assembly 2 and the bulge part can rotate forward and vice versa, so that the first flexible elastic member 2 and the second flexible elastic member 3 resonate.

Noteworthy are: since the third and fifth embodiments are connected to the first and second flexible

elastic members

2 and 3, respectively, through the driving assembly 4, according to the studies of the inventor, it was found that the resonance energy of the resonance apparatus 100 is improved under the same condition and the cleaning ability of the electric toothbrush is enhanced as compared with other embodiments.

The resonance device 100 according to the embodiment of the present utility model realizes reciprocating torsional vibration (oscillation) based on a resonance principle, and the shape of the mass block 22 of the resonance device 100 according to the embodiment of the present utility model has no special requirement, the size of the torsion spring has no requirement, the two must be designed in a matching manner according to a required resonance frequency, the resonance frequency calculation formula f=1/2, k is the spring stiffness, and m is the mass. The coil 414 is electrified through a battery direct current power supply, N and S magnetic poles are generated at the center of the coil 414 and close to the end part of the magnet according to the electro-magnetic principle, the magnet is separated from the middle, the magnetic poles are artificially endowed, half of the magnetic poles are S poles, and the half of the magnetic poles are N poles, and as the width of the magnet is larger than the width of the stator, tangential force is generated, so that a couple, namely torque, is formed, a part of the mass system of the magnet is twisted, torsional vibration is generated, the spring is twisted and deformed, and the force is transmitted along the connecting part, and finally the torsion is transmitted into the rotating shaft 1. When the vibration system is designed, the vibration mode is torsional vibration mode, and the motion direction phase difference of the first flexible elastic piece 2 and the second flexible elastic piece 3 is 180 degrees, namely the front direction and the rear direction are opposite, at the moment, the cleaning assembly realizes rotation, the central node of the rotating shaft 1 is zero point, the front torque and the rear torque counteract, and harmful vibration is reduced. The direction of rotation depends on the direction of energization, and the frequency of operation of the electric toothbrush is mostly around 260Hz, and the frequency of rotation depends on the frequency of energization.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the various embodiments or examples described in this specification and the features of the various embodiments or examples may be combined and combined by those skilled in the art without conflict.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims

1. A resonance apparatus, comprising: the rotating shaft comprises a central node and a central line passing through the central node, and the rotating shaft extends along the direction of the central line; the first flexible elastic piece and the second flexible elastic piece are arranged on the rotating shaft in a penetrating manner and are oppositely arranged on two sides of the center node along the direction of the central line; the driving assembly is at least partially arranged between the first flexible elastic piece and the second flexible elastic piece, and is connected with at least one of the first flexible elastic piece and the second flexible elastic piece; the driving assembly excites and drives the first flexible elastic element and/or the second flexible elastic element to rotate so as to enable the first flexible elastic element and the second flexible elastic element to reversely twist and resonate, and torque generated by resonance is basically counteracted at the center node.

2. The resonance device according to claim 1, wherein at least one of the first flexible elastic member and the second flexible elastic member comprises a flexible spring and a mass block, one of the flexible spring and the mass block is provided with a protrusion, the other of the flexible spring and the mass block is provided with a groove, and the protrusion is arranged in the groove in a penetrating manner so that the flexible spring is connected with the mass block, and the rotating shaft is arranged in the flexible spring in a penetrating manner and drives the flexible spring to rotate.

3. The resonating device of claim 2, wherein the flexible spring comprises:

a spring body consisting of a first connection part with a first stiffness and an annular body with a second stiffness, wherein,

the annular body forms a closed-loop cavity along the circumference of the central line, and the central line passes through the central point of the cavity;

the mounting part is arranged in the cavity, a mounting hole penetrating through the mounting part along the central line direction is formed in the mounting part, and the rotating shaft penetrates through the mounting hole;

the first connecting portion having a first end operatively engaged with an inner peripheral surface of the annular body and a second end operatively engaged with an outer peripheral surface of the mounting portion, the first connecting portion extending in a radial direction of the center line;

The second connecting part comprises a first subsection which is integrally inserted with the annular body and a second subsection which protrudes from the end face of the annular body, and the protruding direction extends along the central line;

when the mounting part circumferentially rotates along the central line, the spring body elastically deforms, so that the second connecting part resists the rotation of the mounting part; when the second connecting part circumferentially rotates along the central line, the spring body elastically deforms, so that the mounting part resists the rotation of the second connecting part.

4. The resonant device of claim 1, wherein the drive assembly comprises:

a stator assembly having at least one coil, the stator assembly further comprising a stator core having first and second stator cores extending in the direction of the center line and disposed opposite each other at intervals in a radial direction of the center line, and a third core disposed at an angle to the center line, the at least one coil being disposed on the third core around an outside of the third core; and

a rotor assembly provided between the first and second flexible elastic members, the rotor assembly including a first magnet assembly, a second magnet assembly, and a rotor bracket extending at least partially between the first and second stator cores, outer circumferential surfaces of the rotor bracket each being disposed at intervals along a radial direction of the center line with inner circumferential surfaces of the first and second stator cores being disposed on the rotor bracket at intervals along the radial direction of the center line, at least a portion of the first and second stator cores and the first magnet assembly forming an air gap between end surfaces that are close to each other, at least a portion of the second stator core and the second magnet assembly forming an air gap between end surfaces that are close to each other, the rotor bracket being connected to at least one of the first and second flexible elastic members;

The first magnet assembly and the second magnet assembly both comprise a first magnetization area and a second magnetization area with opposite magnetic poles, the first magnetization area of the first magnet assembly and the first magnetization area of the second magnet assembly are adjacently arranged at intervals when seen along the direction of the central line, and the second magnetization area of the first magnet assembly and the second magnetization area of the second magnet assembly are adjacently arranged at intervals.

5. The resonance apparatus as set forth in claim 4, wherein the rotor holder is provided with a first hole penetrating the rotor holder in the direction of the center line, the rotation shaft is rotatably penetrated in the first hole, and an outer peripheral surface of the rotation shaft and an inner peripheral surface of the first hole are disposed at a radial interval along the center line.

6. The resonance device according to claim 5, further comprising a support base, one of the third iron core and the support base is provided between the first flexible elastic member and the second flexible elastic member, the other of the third iron core and the support base is provided at a side of the first flexible elastic member away from the second flexible elastic member, the support base is provided with a second hole extending in the center line direction, and one end of the rotation shaft is rotatably penetrated in the second hole.

7. The resonant device of claim 6, wherein the third core is disposed between the first flexible elastic member and the second flexible elastic member, the support is disposed on a side of the first flexible elastic member away from the second flexible elastic member, the third core includes a first section and a second section disposed along a radial interval of the center line, the coil includes a first portion and a second portion that are independent of each other, the first portion is wound on the first section, the second portion is wound on the second section, the first stator core is connected to the first section, the second stator core is connected to the second section, the rotating shaft is disposed between the first section and the second section and is disposed along a radial interval of the center line, the first section is connected to the first stator core, and the second section is connected to the second stator core.

8. The resonant device of claim 6, wherein the third core is disposed on a side of the first flexible elastic member away from the second flexible elastic member, the rotor assembly and the first flexible elastic member are both disposed between the first stator core and the second stator core, the support base is disposed between the first flexible elastic member and the second flexible elastic member, and the first stator core and the second stator core are both disposed on the support base.

9. The resonance device according to claim 7 or 8, wherein the rotor assembly comprises a first rotor assembly and a second rotor assembly, each of the first rotor assembly and the second rotor assembly being rotatably disposed between the first stator core and the second stator core, each of the first rotor assembly and the second rotor assembly being disposed at a radial interval from the first stator core and the second stator core along the center line, the first rotor assembly being connected to the first flexible elastic member, the second rotor assembly being connected to the second flexible elastic member, the first rotor assembly being rotated in a first direction of rotation, the second rotor assembly being rotated in a direction opposite to the first direction of rotation at the center line.

10. The resonance device according to claim 1, further comprising an output assembly including a mounting seat provided on the other side of the flexible elastic member and disposed at an interval from the flexible elastic member in the direction of the center line, an output shaft extending in the direction of the center line and being collinear with the center line of the output shaft, and a connecting member provided on the mounting seat and having a third hole penetrating the mounting seat in the direction of the center line, the connecting member being connected to the flexible elastic member, one end of the output shaft being operatively engaged with the connecting member, the other end of the output shaft being disposed in the third hole in a transmissible manner, and an outer peripheral surface of the output shaft and an inner peripheral surface of the third hole being disposed at a radial interval along the center line.

11. An electric toothbrush, comprising:

a housing having a chamber;

a resonance device provided in the chamber, the resonance device being as claimed in any one of claims 1 to 10, an outer peripheral surface of the resonance device and an inner peripheral surface of the housing being disposed at a radial interval along a center line of the resonance device;

and one end of the cleaning component is arranged in the shell and is connected with the resonance device, so that resonance generated by the resonance device is transmitted to the cleaning component.