CN219184249U - Driving device - Google Patents

Abstract

The utility model discloses a driving device, which comprises an axis, a resonance component, an adjusting piece and a power source, wherein the resonance component comprises a shaft, a first resonance piece and a second resonance piece, the shaft extends along the axis direction, the first resonance piece and the second resonance piece are arranged at intervals along the axis direction and are respectively and operably connected with the shaft, the first resonance piece, the second resonance piece and the shaft are integrally formed, the adjusting piece is arranged on one side of the first resonance piece far away from the second resonance piece and is connected with the first resonance piece, the power source is arranged on one side of the second resonance piece far away from the first resonance piece and is connected with the second resonance piece, the power source excites the second resonance piece to rotate so as to drive the shaft to drive the first resonance piece to rotate, and the shaft drives the first resonance piece and the second resonance piece to resonate and transmit resonance energy to the adjusting piece. The driving device has the advantages of compact structure, simple assembly and the like.

Description

Driving device

Technical Field

The present utility model relates to personal care appliances, and in particular to a drive device.

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 spring structure of the electric toothbrush has complex process and higher processing and manufacturing cost.

Disclosure of Invention

The present utility model has been made based on the findings and knowledge of the inventors regarding the following facts and problems:

in the related art, the spring structure of the electric toothbrush is complicated in process, for example: the patent number CN 113543748A-flexible spring and motor assembly is high in processing and manufacturing cost and complex in manufacturing process due to the fact that a plurality of flexible springs are arranged.

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 driving device which has a simple structure and low processing and manufacturing cost.

According to an embodiment of the present utility model, a driving apparatus includes: an axis; the resonance assembly comprises a shaft, a first resonance piece and a second resonance piece, wherein the shaft extends along the axis direction, the first resonance piece and the second resonance piece are arranged at intervals along the axis direction and are respectively and operably connected with the shaft, the first resonance piece, the second resonance piece and the shaft are integrally formed, and the adjustment piece is arranged on one side, far away from the second resonance piece, of the first resonance piece and is connected with the first resonance piece; the power source is arranged on one side, far away from the first resonance piece, of the second resonance piece and is connected with the second resonance piece, the power source excites and drives the second resonance piece to rotate so as to drive the shaft to rotate, and the shaft drives the first resonance piece to drive so that the first resonance piece and the second resonance piece resonate and resonance energy is transmitted to the adjusting piece.

According to the driving device provided by the embodiment of the utility model, the resonant assembly, the adjusting piece and the power source are arranged, so that the structure of the driving device is simplified, the processing and manufacturing cost of the driving device is reduced, and the elastic device is more compact in structure and higher in mechanical transmission efficiency.

In some embodiments, at least one of the first resonant member and the second resonant member comprises: an elastically deformable annular plate surrounding a closed chamber along a circumference of the axis, the axis being collinear with a centerline of the chamber; a first plate having elastic deformation, one end of the first plate being operatively engaged with an inner peripheral surface of the annular plate, the other end of the first plate being operatively engaged with an outer peripheral surface of the shaft; a second plate located within the chamber and having elastic deformation, one end of the second plate being operatively engaged with the inner peripheral surface of the annular plate, the other end of the second plate being disposed radially spaced from the outer peripheral surface of the shaft along the axis; the annular plate having a first modulus of elasticity, the first plate having a second modulus of elasticity, the second plate having a third modulus of elasticity, the second plate resisting rotation of the shaft upon circumferential rotation of the shaft about the axis; or, upon circumferential rotation of the second plate about the axis, the shaft resists rotation of the second plate.

In some embodiments, at least one of the first and second resonating members further includes a first connection disposed within the chamber and integrally formed with the shaft.

In some embodiments, at least one of the first and second resonant members further comprises a second connecting portion operatively engaged with the other end of the second plate, an outer peripheral surface of the second connecting portion and an outer peripheral surface of the first connecting portion being disposed at a radial interval along the axis.

In some embodiments, the outer peripheral profile of the second connection portion is circular, or the outer peripheral profile of the second connection portion is polygonal, as seen in the direction of the axis.

In some embodiments, the peripheral profile of the annular plate is circular, cylindrical or polygonal, as seen in the direction of the axis.

In some embodiments, the first plate has an orientation that is progressively unfolded from an inner peripheral surface of the annular plate to an outer peripheral surface of the shaft as seen in a section taken along an extension line of the first plate, and/or the second plate has an orientation that is progressively unfolded from an inner peripheral surface of the annular plate to an outer peripheral surface of the shaft as seen in a section taken along an extension line of the second plate.

In some embodiments, the first plates are a plurality of, a plurality of first plates are circumferentially spaced along the axis, and/or the second plates are a plurality of, a plurality of second plates are circumferentially spaced along the axis.

In some embodiments, the number of the first plates and the number of the second plates are equal, the first plates and the second plates are arranged at equal intervals along the circumferential direction of the axis, at least one first plate is arranged between two adjacent second plates, and the first plates and the second plates are arranged at equal intervals along the circumferential direction of the axis.

In some embodiments, the second plate of the second resonating member is located within the first plate of the first resonating member as seen in the direction of the axis.

In some embodiments, at least one of the regulator and the power source comprises: the body is provided with a through hole penetrating through the body along the direction of the axis; the plug-in part is arranged on one side of the body and extends along the axis direction, and the plug-in part is provided with a slot which extends along the axis direction and is integrally inserted with the second connecting part.

In some embodiments, the socket includes first and second protrusions extending in the axial direction, the first and second protrusions being provided on one side of the body and disposed at intervals along the circumference of the body so as to form the socket.

In some embodiments, a side of the first protrusion facing the second protrusion is a first surface, a side of the second protrusion facing the first protrusion is a second surface, at least one of the first surface and the second surface is provided with a groove extending along the axis and integrally penetrating the second connecting portion, two adjacent grooves define the slot, and a center line of the slot coincides with a center line of the second connecting portion.

In some embodiments, the slot is formed on a side of the insertion portion facing the inner peripheral surface of the annular plate, and an outer peripheral surface of the insertion portion is curved when viewed in the axial direction, and an inner peripheral surface of the slot is matched with an outer peripheral surface of the second connection portion.

In some embodiments, the plurality of plug-in parts are arranged at intervals along the circumference of the axis.

Drawings

Fig. 1 is a schematic structural view of a driving device according to an embodiment of the present utility model.

Fig. 2 is an exploded view of a driving device according to an embodiment of the present utility model.

Fig. 3 is a cross-sectional view of a drive device according to an embodiment of the present utility model.

Fig. 4 is a schematic structural view of a resonant assembly according to an embodiment of the present utility model.

Fig. 5 is a schematic structural view of a first plugging portion and an adjusting member according to an embodiment of the present utility model.

Fig. 6 is a schematic structural view of a second type of plug and rotor assembly according to an embodiment of the present utility model.

Fig. 7 is a front view of a second mating portion and rotor assembly of an embodiment of the present utility model.

An electric toothbrush 100;

a housing 1;

a resonating assembly 2; a shaft 21; an axis 211; a first resonating member 22; an annular plate 221; a first plate 222; a second plate 223; a first connection portion 224; a second connection portion 225;

a second resonating member 23;

an adjusting member 3; a body 31; a plug-in portion 32; a slot 321;

a power source 4; a rotor assembly 41; a first protrusion 411; a second protrusion 412; a groove 413; and an output device 5.

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 to 7, an electric toothbrush 100 according to an embodiment of the present utility model includes a housing 1, a driving means and an output means 5.

The drive is provided within the housing 1 and comprises an axis 211, a resonant assembly 2, an adjustment member 3 and a power source 4.

The resonating assembly 2 includes a shaft 21, a first resonating member 22 and a second resonating member 23, the shaft 21 extending in the direction of an axis 211 (left-right direction as viewed in fig. 1), the first resonating member 22 and the second resonating member 23 being spaced apart in the direction of the axis 211 and each being operatively engaged with the shaft 21, the first resonating member 22, the second resonating member 23 and the shaft 21 being integrally formed. Specifically, as shown in fig. 1 to 4, the shaft 21 extends in the left-right direction, and the first resonant member 22 is provided on the left side of the second resonant member 23 and is provided on the shaft 21 to be integrally formed with the shaft 21.

The adjusting member 3 is arranged on the side of the first resonator element 22 remote from the second resonator element 23 and is connected to the first resonator element 22. In particular, as shown in fig. 1-3, the adjustment member 3 may be a rectangular block, a circular block, an oval block, a polygonal block, or the like. The adjusting block is provided on the left side of the first resonance member 22 and is connected to the first resonance member 22, so that the resonance frequency of the driving device is adjusted by the adjusting member 3.

The power source 4 is arranged on the side of the second resonant member 23 remote from the first resonant member 22 and is connected to the second resonant member 23. Specifically, as shown in fig. 1-3, the power source 4 is disposed on the right side of the second resonance member 23 and is connected to the second resonance member 23, so that the power source 4 drives the second resonance member 23 to rotate, and the right end of the output device 5 is disposed in the housing 1 in a penetrating manner and is connected to the adjusting member 3.

The power source 4 excites and drives the second resonance member 23 to rotate so as to drive the shaft 21 to rotate, and the shaft 21 drives the first resonance member 22 to drive so as to resonate the first resonance member 22 and the second resonance member 23 and transmit resonance energy to the adjustment member 3. Thereby, the power source 4 is provided to drive the second resonant member 23 to rotate, the first resonant member 22 drives the shaft 21 to rotate, and the shaft 21 drives the first resonant member 22 to rotate in the opposite direction to the second resonant member 23, in other words, the first resonant member 22 rotates clockwise, the second resonant member 23 rotates counterclockwise, or the first resonant member 22 rotates counterclockwise, and the second resonant member 23 rotates clockwise, so that the first resonant member 22 and the second resonant member 23 resonate, and the resonant energy is transmitted to the output device 5 through the adjusting member 3.

Compared with the driving device provided with a plurality of flexible springs in the related art, the driving device provided with the resonance component 2, the adjusting piece 3 and the power source 4 simplifies the structure of the driving device and facilitates the assembly of the driving device, and in addition, the first resonance piece 22, the second resonance piece 23 and the shaft 21 are integrally formed, so that the first resonance piece 22, the second resonance piece 23 and the shaft 21 can be manufactured through one die, the subsequent assembly of the first resonance piece 22, the second resonance piece 23 and the shaft 21 is omitted, the manufacturing cost of the driving device is reduced, and the elastic device is more compact in structure and higher in mechanical transmission efficiency.

In some embodiments, at least one of the first and second resonators 22 and 23 includes an annular plate 221 having elastic deformation, a first plate 222 having elastic deformation, and a second plate 223 located within the chamber and having elastic deformation.

The annular plate 221 surrounds a closed chamber along the circumference of the axis 211, the axis 211 being collinear with the centerline of the chamber. Specifically, as shown in fig. 4, the annular plate 221 is a flexible material, and the annular plate 221 may be any of a circular ring shape, a polygonal shape, an elliptical shape, or the like, the annular plate 221 having an outer peripheral surface and an inner peripheral surface in a radial direction (an inside-outside direction as shown in fig. 1) of the axis 211, and a center line of a chamber of the annular plate 221 coinciding with the axis 211.

One end of the first plate 222 is operatively engaged with the inner peripheral surface of the annular plate 221, and the other end of the first plate 222 is operatively engaged with the outer peripheral surface of the shaft 21. Specifically, as shown in fig. 4, the first plate 222 is provided between the shaft 21 and the annular plate 221, the first plate 222 is elongated as viewed from the direction of the axis 211, one end of the first plate 222 is connected to the inner peripheral surface of the annular plate 221, the other end of the first plate 222 is connected to the outer peripheral surface of the shaft 21, whereby the shaft 21 and the annular plate 221 are connected by the first plate 222, and the first plate 222 is a flexible material, and the shaft 21 rotates relative to the rotation of the annular plate 221 by the first plate 222.

One end of the second plate 223 is operatively engaged with the inner peripheral surface of the annular plate 221, and the other end of the second plate 223 is disposed radially spaced from the outer peripheral surface of the shaft 21 along the axis 211. Specifically, as shown in fig. 4, the second plate 223 is elongated and is located in the chamber, one end of the second plate 223 is connected to the inner peripheral surface of the annular plate 221, and the other end of the second plate 223 is spaced apart from the outer peripheral surface of the shaft 21 in the inner-outer direction.

The annular plate 221 has a first modulus of elasticity, the first plate 222 has a second modulus of elasticity, the second plate 223 has a third modulus of elasticity, and the second plate 223 resists rotation of the shaft 21 upon circumferential rotation of the shaft 21 about the axis 211; alternatively, the shaft 21 resists rotation of the second plate 223 as the second plate 223 rotates circumferentially about the axis 211. Specifically, when the shaft 21 rotates clockwise or counterclockwise around its circumference, the first plate 222 is driven to rotate, the first plate 222 drives the annular plate 221 to rotate, the annular plate 221 drives the second plate 223 to rotate, and the annular plate 221 and the first plate 222 have the first elastic modulus and the second plate 223 have the second elastic modulus, so that the annular plate 221, the first plate 222 and the second plate 223 can generate elastic deformation to resist the rotation of the shaft 21, or the second plate 223 rotates, and the annular plate 221, the first plate 222 and the shaft 21 are driven to rotate in turn, and the annular plate 221 and the first plate 222 have the second rigidity and the second plate 223 have the third rigidity, so that the annular plate 221 and the first plate 222 can generate elastic deformation to resist the rotation of the second plate 223.

It should be noted that the first elastic modulus, the second elastic modulus and the third elastic modulus may be equal or different, which is not limited in the embodiment of the present utility model and may be set according to practical situations.

In some embodiments, at least one of the first and second resonating members 22 and 23 further includes a first connection 224 disposed within the chamber and integrally formed with the shaft 21. Specifically, as shown in fig. 4, the first connection portion 224 may be, but is not limited to, a rectangular block, a cylindrical block, an elliptical cylindrical block, a polygonal block, etc., the first connection portion 224 is provided in the chamber, and the first connection portion 224 and the inner circumferential surface of the annular plate 221 are disposed at intervals along the radial direction of the axis 211, and the shaft 21 is inserted into the first connection portion 224 and the first connection portion 224 is integrally formed, thereby making the first and second resonance members 22 and 23 more reasonably disposed.

In some embodiments, at least one of the first and second resonators 22 and 23 further includes a second connection 225 operatively engaged with the other end of the second plate 223, an outer circumferential surface of the second connection 225 and an outer circumferential surface of the first connection 224 being disposed at a radial interval along the axis 211. Specifically, as shown in fig. 4, the second connection portion 225 is provided at the free end of the second plate 223, the second connection portion 225 is located in the chamber and the outer circumferential surface of the second connection portion 225 and the outer circumferential surface of the first connection portion 224 are disposed at intervals in the inner and outer directions so as to be connectable to the regulator 3 or the power source 4 through the second connection portion 225.

In some embodiments, the peripheral profile of the second connection 225 is circular, or the peripheral profile of the second connection 225 is polygonal, as seen in the direction of the axis 211 (from left to right or from right to left). Specifically, the second connection part 225 may be any one of a cylindrical shape, an elliptic cylindrical shape, a polygonal cylindrical shape, etc., so that the second connection part 225 has a variety, and thus a user can manufacture the second connection part 225 according to actual conditions.

In some embodiments, the peripheral profile of the annular plate 221 is circular, cylindrical, or polygonal, as viewed in the direction of the axis 211 (left to right or right to left). Specifically, the annular plate 221 may be in a circular ring shape, an elliptical ring shape, or other ring shapes, so that the annular plate 221 has a variety, and thus a user can manufacture the annular plate 221 according to actual conditions.

In some embodiments, the orientation of the first plate 222 having a component perpendicular to the extension line of the first plate 222 gradually expands from the inner circumferential surface of the annular plate 221 to the outer circumferential surface of the shaft 21 when viewed in the section where the extension line of the first plate 222 is located, specifically, as shown in fig. 4, the cross-sectional area of the first plate 222 gradually decreases from inside to outside when viewed in the section where the first plate 222 is located, in other words, the cross-sectional area of the first plate 222 connected to the shaft 21 is larger than the cross-sectional area of the first plate 222 connected to the annular plate 221, and since the shaft 21 drives the annular plate 221 to rotate through the first plate 222, the cross-sectional area of the first plate 222 connected to the shaft 21 is larger, the stability of the first resonant member 22 and the second resonant member 23 is improved, the cross-sectional area of the first plate 222 connected to the annular plate 221 is smaller, and the elastic deformation amount of the first plate 222 is improved, so that the annular plate 221 is driven to rotate around the circumferential direction of the axis by the first plate 222, in addition, the cross-sectional area of the first plate 222 gradually increases in the direction adjacent to the shaft 21, and the stress concentration of the first plate 222 is also eliminated, and the fatigue life of the first plate 222 is improved.

In some embodiments, the second plate 223 has an orientation that gradually expands from an inner peripheral surface of the annular plate 221 to an outer peripheral surface of the shaft 21, as seen in a section where an extension line of the second plate 223 is located. Specifically, as shown in fig. 4, the cross-sectional area of the second plate 223 is gradually reduced from inside to outside as seen in the cross-section of the second plate 223, in other words, the cross-sectional area of the second plate 223 adjacent to the shaft 21 is larger than the cross-sectional area of the second plate 223 connected to the annular plate 221, thereby eliminating stress concentration of the second plate 223 due to deformation and improving the fatigue life of the second plate 223.

In some embodiments, the first plates 222 are a plurality, the plurality of first plates 222 are circumferentially spaced along the axis 211, the second plates 223 are a plurality, and the plurality of second plates 223 are circumferentially spaced along the axis 211. Specifically, the first plates 222 are disposed at equal intervals along the circumferential direction of the first connection portion 224, and the second plates 223 are disposed at equal intervals along the circumferential direction of the first connection portion 224, so that stability and force transmission performance of the first and second resonance members 22 and 23 are improved, and the first and second resonance members 22 and 23 are disposed more reasonably.

In some embodiments, the number of the plurality of first plates 222 and the number of the plurality of second plates 223 are equal, the plurality of first plates 222 and the plurality of second plates 223 are disposed at equal intervals along the circumference of the axis 211, and at least one first plate 222 is disposed between two adjacent second plates 223, and the plurality of first plates 222 and the plurality of second plates 223 are each disposed at equal intervals along the circumference of the axis 211. Therefore, when the first connection portion 224 transmits force to the annular plate 221 through the first plate 222 or transmits force to the annular plate 221 through the second plate 223 through the second connection portion 225, the deformation of each position of the annular plate 221 can be substantially uniform due to the equal number of the first plates 222 and the second plates 223, so that the stress of the annular plate 221 is more balanced, the stress distribution is more uniform, and the service life of the annular plate 221 is prolonged.

It will be appreciated that the number of first plates 222 and the number of second plates 223 in embodiments of the present utility model may also be different according to actual needs, for example: the number of first plates 222 is greater than the number of second plates 223, or the number of first plates 222 is less than the number of second plates 223.

In some embodiments, at least one first plate 222 is disposed between two adjacent second plates 223, the plurality of first plates 222 and the plurality of second plates 223 each being equally spaced along the circumference of the axis 211. Specifically, the first plates 222 and the second plates 223 are alternately arranged in turn in the circumferential direction of the first connecting portion 224, so that the deformation of each position of the annular plate 221 is further ensured to be substantially uniform, the stress distribution to which the annular plate 221 is subjected is more uniform, and the service life of the annular plate 221 is ensured.

In some embodiments, the plurality of first plates 222 includes a first sub-connection plate, a second sub-connection plate, and a third sub-connection plate, each of the first sub-connection plate, one end of the second sub-connection plate, and one end of the third sub-connection plate is operatively engaged with the inner circumferential surface of the annular plate 221, and each of the other end of the first sub-connection plate, the other end of the second sub-connection plate, and the other end of the third sub-connection plate is operatively engaged with the outer circumferential surface of the first connection portion 224. Specifically, as shown in fig. 3, the number of the first plates 222 is 3, the 3 first plates 222 are respectively a first sub-connecting plate, a second sub-connecting plate and a third sub-connecting plate, and the first sub-connecting plate, the second sub-connecting plate and the third sub-connecting plate are arranged at equal intervals along the circumferential direction of the first connecting portion 224, therefore, the connecting lines of the intersections of the first sub-connecting plate, the second sub-connecting plate and the third sub-connecting plate at the connecting position of the annular plate 221 form a triangle-shaped structure, and due to the stability of the triangle, the arrangement of the first sub-connecting plate, the second sub-connecting plate and the third sub-connecting plate further improves the stability of the first resonance piece 22 and the second resonance piece 23, and the service life is prolonged. When the number of the first plates 222 is greater than 3, not only the rotation angle of the first connection portion 224 and the annular plate 221 is limited, but also the first plates 222 cannot be reasonably arranged in the installation cavity because the space in the installation cavity is limited. When the number of the first plates 222 is less than 3, the first plates 222 are subjected to a larger stress due to the smaller number of the first plates 222 when the first and second resonance members 22 and 23 are excited to rotate, so that the first plates 222 are easily damaged, thereby resulting in a reduction in the service lives of the first and second resonance members 22 and 23.

In some embodiments, the plurality of second plates 223 includes a fourth sub-connection plate, a fifth sub-connection plate, and a sixth sub-connection plate, each of the fourth sub-connection plate, the fifth sub-connection plate, and the sixth sub-connection plate having a connection end operatively engaged with the inner circumferential surface of the annular plate 221, and a second end disposed at intervals along the radial direction of the axis 211 from the outer circumferential surface of the first connection portion 224, the first sub-connection plate, the fourth sub-connection plate, the second sub-connection plate, the fifth sub-connection plate, the third sub-connection plate, and the sixth sub-connection plate being disposed at intervals in order in the circumferential direction of the axis 211. Specifically, the number of the second plates 223 is 3, and the 3 second plates 223 are respectively a fourth sub-connecting plate, a fifth sub-connecting plate and a sixth sub-connecting plate, which are sequentially arranged at equal intervals along the circumferential direction of the first connecting portion 224, so that force transmission formation of the first resonance member 22 and the second resonance member 23 is ensured, stability of the first resonance member 22 and the second resonance member 23 is further improved, and service life is prolonged. In addition, the first sub-connecting plate, the fourth sub-connecting plate, the second sub-connecting plate, the fifth sub-connecting plate, the third sub-connecting plate and the sixth sub-connecting plate are sequentially arranged at equal intervals in the circumferential direction of the axis 211, so that the stress distribution to which the annular plate 221 is subjected is ensured to be more uniform, the service life of the annular plate 221 is ensured, and the arrangement of the first plate 222 and the second plate 223 is more reasonable.

In some embodiments, the second plate 223 of the second resonant member 23 is positioned within the first plate 222 of the first resonant member 22 as viewed in the direction of the axis 211. Specifically, as shown in fig. 4, the second plate 223 of the second resonant member 23 and the first plate 222 of the first resonant member 22 are disposed opposite to each other in the left-right direction, thereby allowing the first and second spring assemblies to have a phase difference when rotating, facilitating the resonance of the first and second resonant members 22 and 23.

In some embodiments, at least one of the regulator 3 and the power source 4 includes a body 31 and a socket 32.

The body 31 is provided with a through hole penetrating the body 31 in the direction of the axis 211. Specifically, as shown in fig. 5 to 7, the adjusting member 3 is provided with a through hole penetrating the body 31 in the left-right direction, the shaft 21 is inserted into the through hole and is disposed at intervals along the inner-outer direction with the through hole, so that radial runout of the shaft 21 on the axis 211 is restricted by the through hole, the power source 4 comprises a stator assembly, a rotor assembly 41, a connecting shaft 21 and a bracket, the bracket and the stator assembly are fixed in the housing 1, the rotor assembly 41 is rotatably disposed between the stator assembly and the second resonance member 23, the rotor assembly 41 is provided with a through hole penetrating the rotor assembly 41 in the left-right direction, the left end of the connecting shaft 21 is inserted into the through hole, and the right end of the connecting shaft 21 is inserted into the bracket, so that an installation foundation is provided for the rotor assembly 41 by the connecting shaft 21.

The plugging portion 32 is disposed on one side of the body 31 and extends along the axis 211, and the plugging portion 32 has a slot 321 extending along the axis 211 and integrally inserted into the second connecting portion 225. Specifically, as shown in fig. 5-7, the plugging portion 32 is disposed at the right end of the adjusting member 3 and the left end of the power source 4, and the plugging portion 32 is provided with a slot 321 that mates with the second connecting portion 225, so that the plugging portion 32 of the adjusting member 3 can be inserted into the first resonant member 22, and the second connecting portion 225 is inserted into the slot 321, so that the adjusting member 3 and the first resonant member 22 are mounted together, and the plugging portion 32 of the rotor assembly 41 can be inserted into the second resonant member 23, so that the second connecting portion 225 is inserted into the slot 321, and the rotor assembly 41 and the second resonant member 23 are mounted together.

Because of the layout of the first plate 222, the second plate 223, the first connection portion 224 and the second connection portion 225, there are many gaps in the annular plate 221, so in order to reasonably use the space in the annular plate 221, in some embodiments, the plugging portion 32 includes a first protrusion 411 and a second protrusion 412 extending along the axis 211 direction, and the first protrusion 411 and the second protrusion 412 are disposed on one side of the body 31 and are disposed at intervals along the circumferential direction of the body 31 so as to form the slot 321. Therefore, the first protrusion 411 and the second protrusion 412 may be protrusion columns or protrusion blocks, the first protrusion 411 and the second protrusion 412 extend into the annular plate 221, thereby occupying an effective space in the annular plate 221, further reducing the thickness of the body 31 of the adjusting member 3 and the body 31 of the rotating assembly of the power source 4 under the same quality, reducing the length of the driving device, enabling the driving device to be more compact, increasing the length (i.e. the capacity) of the battery by the redundant space, improving the endurance of the electric toothbrush 100, and in addition, forming the slots 321 at intervals along the circumferential direction of the axis 211, so that the second connection portion 225 can be conveniently penetrated in the slots 321.

In some embodiments, as shown in fig. 6-7, a side of the first protrusion 411 facing the second protrusion 412 is a first surface, a side of the second protrusion 412 facing the first protrusion 411 is a second surface, at least one of the first surface and the second surface is provided with a groove 413 extending along the axis 211 and integrally interposed with the second connection portion 225, two adjacent grooves 413 define a slot 321, and a center line of the slot 321 coincides with a center line of the second connection portion 225. Thereby, the second connecting portion 225 is restricted in the slot 321, and the driving device is prevented from moving between the first face and the second face during operation, and in addition, when the first protrusion 411 and the second protrusion 412 are inserted in the annular plate 221, the two faces of the first protrusion 411 in the radial direction on the axis 211 are spaced from the first plate 222 and the second plate 223, and the two faces of the second protrusion 412 in the radial direction on the axis 211 are spaced from the first plate 222 and the second plate 223, so that the first protrusion 411 and the second protrusion 412 are prevented from affecting the rotation of the first plate 222 and the second plate 223.

In some embodiments, the socket 321 is formed on a side of the insertion portion 32 facing the inner peripheral surface of the annular plate 221, and the outer peripheral surface of the insertion portion 32 is curved when viewed from the axis 211, and the inner peripheral surface of the socket 321 is matched with the outer peripheral surface of the second connecting portion 225. Specifically, as shown in fig. 6 to 7, the insertion portion 32 is an arc-shaped plate, and the central angle of the arc-shaped plate is greater than 180 °, so that the adjusting member 3 and the rotor assembly 41 are respectively connected to the first resonant member 22 and the second resonant member 23 by the insertion slot 321 of the insertion portion 32 being engaged with the second connecting portion 225.

In some embodiments, the plug 32 is a plurality of plug 32, and the plurality of plug 32 are circumferentially spaced along the axis 211. Specifically, as shown in fig. 5 to 7, the number of the plugging portions 32 is equal to the number of the second connection portions 225, so that each second connection portion 225 is penetrated in the plugging portion 32, thereby improving the force transmission performance of the first resonant member 22 and the second resonant member 23, and making the arrangement of the first resonant member 22 and the second resonant member 23 more reasonable.

It should be noted that: the utility model realizes the reciprocating torsional vibration (swinging) of the first resonant member 22 and the second resonant member 23 based on the resonance principle, the shape of the adjusting member 3 has no special requirement, the sizes of the first resonant member 22 and the second resonant member 23 do not need, the adjusting member 3, the first resonant member 22 and the second resonant member 23 are matched and designed according to the required resonance frequency, the resonance frequency calculation formula f=1/2, k is the spring stiffness, and m is the mass. The power source is powered by the battery direct current power source, so that the rotor assembly of the power source is twisted, torsional vibration is generated, the first resonant member 22 and the second resonant member 23 are twisted and deformed, and finally the torsion is transmitted to the output device. When the vibration system is designed, the vibration mode is torsional vibration mode, and the motion directions of the first resonance piece 22 and the second resonance piece 23 are 180 degrees out of phase, namely the front direction and the rear direction are opposite, at the moment, the output device 5 realizes rotation, the middle point of the shaft 21 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 21", "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 simplify 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 (15)

1. A driving device, characterized by comprising: an axis; the resonance assembly comprises a shaft, a first resonance piece and a second resonance piece, wherein the shaft extends along the axis direction, the first resonance piece and the second resonance piece are arranged at intervals along the axis direction and are respectively and operably connected with the shaft, the first resonance piece, the second resonance piece and the shaft are integrally formed, and the adjustment piece is arranged on one side, far away from the second resonance piece, of the first resonance piece and is connected with the first resonance piece; the power source is arranged on one side, far away from the first resonance piece, of the second resonance piece and is connected with the second resonance piece, the power source excites and drives the second resonance piece to rotate so as to drive the shaft to rotate, and the shaft drives the first resonance piece to drive so that the first resonance piece and the second resonance piece resonate and resonance energy is transmitted to the adjusting piece.

2. The drive of claim 1, wherein at least one of the first resonant member and the second resonant member comprises:

an elastically deformable annular plate surrounding a closed chamber along a circumference of the axis, the axis being collinear with a centerline of the chamber;

a first plate having elastic deformation, one end of the first plate being operatively engaged with an inner peripheral surface of the annular plate, the other end of the first plate being operatively engaged with an outer peripheral surface of the shaft;

a second plate located within the chamber and having elastic deformation, one end of the second plate being operatively engaged with the inner peripheral surface of the annular plate, the other end of the second plate being disposed radially spaced from the outer peripheral surface of the shaft along the axis;

the annular plate having a first modulus of elasticity, the first plate having a second modulus of elasticity, the second plate having a third modulus of elasticity, the second plate resisting rotation of the shaft upon circumferential rotation of the shaft about the axis; or, upon circumferential rotation of the second plate about the axis, the shaft resists rotation of the second plate.

3. The drive of claim 2, wherein at least one of the first and second resonating members further comprises a first connection disposed within the chamber and integrally formed with the shaft.

4. A driving device according to claim 3, wherein at least one of the first and second resonance members further includes a second connection portion operatively engaged with the other end of the second plate, an outer peripheral surface of the second connection portion and an outer peripheral surface of the first connection portion being disposed at a radial interval along the axis.

5. The drive device according to claim 4, wherein an outer peripheral contour of the second connecting portion is circular or an outer peripheral contour of the second connecting portion is polygonal as seen in a direction of the axis.

6. The drive device according to claim 2, wherein the outer circumferential profile of the annular plate is circular, cylindrical or polygonal as seen in the direction of the axis.

7. The driving device according to claim 2, wherein the first plate has an orientation which gradually spreads from an inner peripheral surface of the annular plate to an outer peripheral surface of the shaft as viewed in a section where an extension line of the first plate is located,

and/or, in a cross section where the extension line of the second plate is located, the second plate is gradually unfolded from an inner peripheral surface of the annular plate to an outer peripheral surface of the shaft with an orientation of a perpendicular component to the extension line of the second plate.

8. The drive device according to claim 2, wherein the first plates are plural, the plural first plates being disposed at intervals in a circumferential direction of the axis, and/or the second plates are plural, the plural second plates being disposed at intervals in a circumferential direction of the axis.

9. The drive device according to claim 8, wherein the number of the plurality of first plates and the number of the plurality of second plates are equal, the plurality of first plates and the plurality of second plates are arranged at equal intervals in a circumferential direction of the axis, and at least one of the first plates is arranged between adjacent two of the second plates, and the plurality of first plates and the plurality of second plates are each arranged at equal intervals in the circumferential direction of the axis.

10. The drive of claim 2, wherein the second plate of the second resonating member is located within the first plate of the first resonating member as viewed in the direction of the axis.

11. The drive of claim 4, wherein at least one of the adjustment member and the power source comprises:

the body is provided with a through hole penetrating through the body along the direction of the axis;

the plug-in part is arranged on one side of the body and extends along the axis direction, and the plug-in part is provided with a slot which extends along the axis direction and is integrally inserted with the second connecting part.

12. The driving device according to claim 11, wherein the insertion portion includes first and second protrusions extending in the axial direction, the first and second protrusions being provided on one side of the body and arranged at intervals in a circumferential direction of the body so as to form the insertion groove.

13. The driving device according to claim 12, wherein a side of the first protrusion facing the second protrusion is a first surface, a side of the second protrusion facing the first protrusion is a second surface, at least one of the first surface and the second surface is provided with a groove extending along the axis and integrally penetrating the second connecting portion, two adjacent grooves define the slot, and a center line of the slot coincides with a center line of the second connecting portion.

14. The driving device according to claim 11, wherein the insertion groove is formed on a side of the insertion portion facing the inner peripheral surface of the annular plate, an outer peripheral contour of the insertion portion is arc-shaped as viewed in the axial direction, and an inner peripheral surface contour of the insertion groove is fitted to an outer peripheral surface of the second connecting portion.

15. The drive of any one of claims 11-14, wherein the plurality of plug-in portions are circumferentially spaced along the axis.

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