CN118268227A - Elastic member and resonant assembly - Google Patents

Abstract

The invention discloses an elastic piece and a resonance assembly, wherein the elastic piece comprises an axis, a spring unit, an inner ring arranged in a mounting cavity and a mounting piece fixedly connected with the second end of a second rib plate, the spring unit comprises an outer ring with first rigidity, a first rib plate with second rigidity and a second rib plate with third rigidity, the outer ring surrounds the axis along the circumferential direction of the axis to form a closed mounting cavity, and the axis passes through the central point of the mounting cavity; one end of the first rib plate is operatively engaged with the inner peripheral surface of the outer ring; the second rib has a first end operatively engaged with the inner peripheral surface of the outer ring and a second end spaced from the outer peripheral surface of the inner ring in a radial direction of the axis, the second rib being spaced from the first rib in a circumferential direction of the axis, the other end of the first rib being operatively engaged with the outer peripheral surface of the inner ring, the inner ring having a mounting hole therein, the mounting being adjacent the inner ring. The invention has the advantages of simple structure, low cost and the like.

Description

Elastic parts and resonance components

Technical Field

The present invention relates to a personal care appliance, in particular to an elastic member and a resonance component.

Background technique

The electric toothbrush uses a motor to drive the spring to make the brush head produce high-frequency vibrations, instantly breaking down the toothpaste into fine foam to deeply clean the gaps between teeth, achieving the purpose of whitening teeth.

In the related art, the spring structure of the electric toothbrush has a complex process and a high processing and manufacturing cost.

Summary of the invention

The present invention is based on the inventor's discovery and understanding of the following facts and problems:

In the related art, the spring structure of the electric toothbrush is complex in process, for example, Patent No. CN113543748A-Flexible Spring and Motor Assembly, in which a plurality of protrusions are arranged on the rotating component, has a high processing and manufacturing cost and a complex manufacturing process.

The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

To this end, an embodiment of the present invention provides an elastic member with a simple structure and low cost.

The embodiment of the present invention provides a resonance component with simple assembly and simple structure.

The elastic member according to an embodiment of the present invention comprises: an axis; a spring unit, wherein the spring unit comprises an outer ring with a first stiffness, a first rib plate with a second stiffness, and a second rib plate with a third stiffness, wherein the outer ring surrounds the circumference of the axis to form a closed installation cavity, and the axis passes through the center point of the installation cavity; one end of the first rib plate is operatively engaged with the inner circumference of the outer ring; the second rib plate has a first end operatively engaged with the inner circumference of the outer ring, and the second rib plate and the first rib plate are spaced apart in the circumferential direction of the axis; and the second rib plate is arranged on the installation cavity. The inner ring of the cavity, the other end of the first rib is operatively engaged with the outer circumference of the inner ring, and the inner ring has a mounting hole; it also includes a mounting member fixedly connected to the second end of the second rib, and the mounting member and the outer circumference of the inner ring are spaced apart in the radial direction of the axis; when the inner ring rotates circumferentially around the axis, the first stiffness, the second stiffness and the third stiffness enable the mounting member to resist the rotation of the inner ring; or, when the mounting member rotates circumferentially around the axis, the first stiffness, the second stiffness and the third stiffness enable the inner ring to resist the rotation of the mounting member.

The elastic member of the embodiment of the present invention is provided with an outer ring, an inner ring, a first rib plate, a second rib plate and a mounting member, which simplifies the processing technology of the elastic member and reduces the processing and manufacturing cost of the elastic member.

In some embodiments, when viewed from the cross-section where the extension line of the first rib is located, the first rib gradually expands from the inner circumference of the outer ring to the outer circumference of the inner ring, with an orientation having a component perpendicular to the extension line of the first rib and/or, when viewed from the cross-section where the extension line of the second rib is located, the second rib gradually expands from the inner circumference of the outer ring to the outer circumference of the inner ring, with an orientation having a component perpendicular to the extension line of the second rib.

In some embodiments, there are a plurality of first ribs, which are spaced apart circumferentially along the axis, and/or there are a plurality of second ribs, which are spaced apart circumferentially along the axis.

In some embodiments, the number of the first ribs is equal to the number of the second ribs.

In some embodiments, at least one of the first ribs is disposed between two adjacent second ribs, and a plurality of the first ribs and a plurality of the second ribs are disposed at equal intervals along the circumferential direction of the axis.

In some embodiments, the plurality of first ribs include a first sub-rib, a second sub-rib and a third sub-rib, each of the first sub-rib, one end of the first sub-rib, one end of the second sub-rib and one end of the third sub-rib is operatively engaged with the inner circumference of the outer ring, and each of the other end of the first sub-rib, the other end of the second sub-rib and the other end of the third sub-rib is operatively engaged with the outer circumference of the inner ring, and the plurality of second ribs include a fourth sub-rib, a fifth sub-rib and a sixth sub-rib, each of the fourth sub-rib, the fifth sub-rib and the sixth sub-rib has a connecting end operatively engaged with the inner circumference of the outer ring, and a second end spaced apart from the outer circumference of the inner ring along the radial direction of the axis, and the first sub-rib, the fourth sub-rib, the second sub-rib, the fifth sub-rib, the third sub-rib and the sixth sub-rib are spaced apart in sequence in the circumferential direction of the axis.

In some embodiments, the inner circumferential surface of the inner ring is a circular cylinder or a polygonal cylinder that does not intersect the axis.

In some embodiments, the inner circumferential surface of the inner ring includes a first surface and a second surface, one edge of the first surface is connected to one edge of the second surface, the other edge of the first surface is connected to the other edge of the second surface, the first surface is a plane, and the second surface protrudes in the radial direction of the axis.

In some embodiments, viewed from the axial direction, the outer peripheral surface of the outer ring has a circular, elliptical or polygonal contour, and/or the outer peripheral surface of the mounting member may have a circular, elliptical or polygonal contour.

According to an embodiment of the present invention, the resonance component includes: an adjusting member, on which a matching portion is provided, and the adjusting member is used to adjust the resonance frequency of the resonance component; an elastic member, which is the elastic member described in any one of the above embodiments, and the mounting member of the elastic member is connected to the matching portion of the adjusting member; when the inner ring of the elastic member is excited to rotate, the first rib plate of the elastic member, the outer ring of the elastic member, the second rib plate of the elastic member and the mounting member of the elastic member are driven to rotate in sequence, thereby driving the adjusting member to rotate, or, when the adjusting member is excited to rotate, the mounting member of the elastic member, the second rib plate of the elastic member, the outer ring of the elastic member and the inner ring of the elastic member are driven to rotate in sequence through the matching portion.

In some embodiments, the matching portion extends from one side of the adjusting member toward a direction adjacent to the elastic member, and the matching portion is provided with a slot matching with a mounting member of the elastic member.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of an electric toothbrush according to an embodiment of the present invention.

FIG. 2 is an exploded view of the electric toothbrush according to the embodiment of the present invention.

FIG. 3 is a schematic structural diagram of an elastic member according to an embodiment of the present invention.

FIG. 4 is a schematic structural diagram of a first adjusting member according to an embodiment of the present invention.

FIG. 5 is a schematic diagram of the installation of the first adjusting member and the elastic member according to an embodiment of the present invention.

FIG. 6 is a schematic structural diagram of a second adjusting member according to an embodiment of the present invention.

FIG. 7 is a front view of a second adjusting member according to an embodiment of the present invention.

Elastic member 100;

Electric toothbrush 10;

Axis 1;

Spring unit 2; outer ring 21; first rib 22; first sub-rib 221; second sub-rib 222; third sub-rib 223; inner ring 23; first surface 231; second surface 232; mounting hole 233; second rib 24; fourth sub-rib 241; fifth sub-rib 242; sixth sub-rib 243; mounting member 3; resonance assembly 4; adjustment member 41; matching portion 411; first protrusion 4111; second protrusion 4112; slot 412; first hole 413;

A first resonance component 42; a second resonance component 43;

Shell 5;

Support frame 6; shaft 7; resonance assembly 8; motor 9; rotor 91;

Toothbrush assembly 101.

Detailed ways

Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

The following describes an electric toothbrush according to an embodiment of the present invention with reference to the accompanying drawings.

As shown in FIGS. 1-7 , the electric toothbrush according to the embodiment of the present invention includes a housing 5 , a support frame 6 , a shaft 7 , a resonance component 4 , a motor 9 and a toothbrush component 8 .

The support frame 6 is supported in the housing 5, and the shaft 7 is rotatably disposed on the support frame 6. Specifically, as shown in Fig. 1-2, the support frame 6 is fixed in the housing 5, and the support frame 6 is provided with a second hole (not shown in the figure) penetrating the support frame 6 in the left-right direction, and the aperture of the second hole is larger than the outer diameter of the shaft 7, so that the shaft 7 is rotatably disposed in the second hole.

The resonance assembly 4 includes a first resonance assembly 42 and a second resonance assembly 43. The first resonance assembly 42 is arranged on the shaft 7 so that the first resonance assembly 42 drives the shaft 7 to rotate. The second resonance assembly 43 is arranged on the shaft 7 so that the shaft 7 drives the second resonance assembly 43 to rotate. The support frame 6 is located between the first resonance assembly 42 and the second resonance assembly 43 so that the first resonance assembly 42 and the second resonance assembly 43 resonate. The outer peripheral surface of the first resonance assembly 42 and the inner peripheral surface of the shell 5 are arranged at intervals along the radial direction of the axis 1 (in the inner and outer directions as shown in FIG. 3 ), and the outer peripheral surface of the second resonance assembly 43 and the inner peripheral surface of the shell 5 are arranged at intervals along the radial direction of the axis 1. Specifically, as shown in FIG. 1-2 , the first resonance assembly 42 and the second resonance assembly 43 are both arranged on the shaft 7, the first resonance assembly 42 is located on the left side of the support frame 6, and the second resonance assembly 43 is located on the right side of the support frame 6, so that the first resonance assembly 42 and the second resonance assembly 43 are suspended in the shell 5 through the support frame 6.

The motor 9 is disposed in the housing 5, and the motor 9 is connected to the second resonance component 43, so that the motor 9 drives the second resonance component 43 to rotate to drive the shaft 7 to drive the first resonance component 42. Specifically, as shown in FIG1 , the motor 9 is disposed on the right side of the second resonance component 43 and is connected to the second resonance component 43, so that the shaft 7 is driven to rotate through the second resonance component 43, and the shaft 7 drives the second resonance component 43.

By adjusting the frequency of the motor 9, the first resonance component 42 and the second resonance component 43 can resonate, and the first resonance component 42 and the second resonance component 43 rotate in opposite directions. In other words, the first resonance component 42 rotates clockwise and the second resonance component 43 rotates counterclockwise, or the first resonance component 42 rotates counterclockwise and the second resonance component 43 rotates clockwise to resonate the first resonance component 42 and the second resonance component 43. Moreover, such different-direction rotation reduces the transmission of torsional vibration that may be transmitted to the user during operation.

The toothbrush assembly 8 is connected to the second resonance assembly 43 so that the second resonance assembly 43 drives the toothbrush assembly 8 to vibrate. Specifically, as shown in Figures 1-2, the toothbrush assembly 8 is arranged on the left side of the second resonance assembly 43 and is connected to the second resonance assembly 43, thereby allowing the motor 9 to generate high-frequency vibrations that are transmitted to the toothbrush assembly 8 so that the toothbrush assembly 8 cleans the teeth of a person.

At least one of the first resonance component 42 and the second resonance component 43 includes an elastic member 100 and an adjusting member 41 . The elastic member 100 includes an axis 1 , a spring unit 2 , an inner ring 23 disposed in the mounting cavity, and a mounting member 3 fixedly connected to the second end of the second rib 24 .

The spring unit 2 includes an outer ring 21 with a first stiffness, a first rib plate 22 with a second stiffness, and a second rib plate 24 with a third stiffness, wherein the outer ring 21 surrounds the axis 1 in the circumferential direction to form a closed installation cavity, the axis 1 passes through the center point of the installation cavity, and one end of the first rib plate 22 is operatively engaged with the inner circumference of the outer ring 21. Specifically, as shown in FIG3 , the outer circumference of the outer ring 21 can be any of a circular ring, an elliptical ring, and a polygonal ring, and one end of the first rib plate 22 is connected to the inner circumference of the outer ring 21.

The second rib plate 24 has a first end operatively engaged with the inner circumference of the outer ring 21, and a second end spaced apart from the outer circumference of the inner ring 23 in the radial direction of the axis 1, and the second rib plate 24 and the first rib plate 22 are spaced apart in the circumferential direction of the axis 1. Specifically, as shown in FIG3 , the first end of the second rib plate 24 is connected to the inner circumference of the outer ring 21, the second end of the second rib plate 24 is spaced apart from the outer circumference of the inner ring 23 in the inner-outer direction, and the first rib plate 22 and the second rib plate 24 are spaced apart in the circumferential direction of the outer ring 21.

The other end of the first rib 22 is operatively engaged with the outer circumference of the inner ring 23, and the inner ring 23 has a mounting hole 233. Specifically, as shown in FIG3 , the inner ring 23 includes but is not limited to a rectangular block, a cylindrical block, an elliptical cylindrical block, a polygonal block, etc. The inner ring 23 is arranged in the mounting cavity, and the outer circumference of the inner ring 23 and the inner circumference of the outer ring 21 are arranged radially spaced along the axis 1. The inner ring 23 has a mounting hole 233 of the inner ring 23 that penetrates along the axis 1 direction (the left and right direction as shown in FIG1 ), and the shaft 7 is passed through the mounting hole 233 and can drive the inner ring 23 to rotate. Preferably, the axis of the mounting hole 233 coincides with the axis 1.

The mounting member 3 and the outer circumference of the inner ring 23 are spaced apart in the radial direction (in the inner and outer directions as shown in FIG. 3 ) of the axis 1. Specifically, as shown in FIG. 3 , the mounting member 3 is fixed to the second end of the second rib plate 24 and the mounting member 3 is disposed in the mounting cavity, and the outer circumference of the mounting member 3 and the outer circumference of the inner ring 23 are spaced apart in the inner and outer directions.

The outer ring 21 has a first stiffness, the first rib 22 has a second stiffness, and the second rib 24 has a third stiffness. When the inner ring 23 rotates circumferentially around the axis 1, the first stiffness, the second stiffness, and the third stiffness enable the mounting member 3 to resist the rotation of the inner ring 23; or, when the mounting member 3 rotates circumferentially around the axis 1, the first stiffness, the second stiffness, and the third stiffness enable the inner ring 23 to resist the rotation of the mounting member 3. Specifically, when the inner ring 23 rotates clockwise or counterclockwise around its circumference, it will drive the first rib 22 to rotate, the first rib 22 will drive the outer ring 21 to rotate, and the outer ring 21 will drive the second rib 24 to rotate. Since the outer ring 21 has a first stiffness, the first rib 22 has a second stiffness, and the second rib 24 has a third stiffness, the outer ring 21, the first rib 22 and the second rib 24 can produce elastic deformation to resist the rotation of the inner ring 23, or when the mounting member 3 rotates, it will drive the second rib 24, the outer ring 21 and the first rib 22 to rotate in turn. Since the outer ring 21 has a first stiffness, the first rib 22 has a second stiffness, and the second rib 24 has a third stiffness, the outer ring 21, the first rib 22 and the second rib 24 can produce elastic deformation to resist the rotation of the mounting member 3.

It is worth noting that the first stiffness, the second stiffness and the third stiffness may be equal or different in magnitude, and the embodiment of the present invention does not limit this and may be set according to actual conditions.

The adjusting member 41 is provided with a matching portion 411, and the mounting member 3 of the elastic member 100 is connected to the matching portion 411 of the adjusting member 41, and the adjusting member 41 is used to adjust the resonance frequency of the resonance assembly 4. Specifically, as shown in FIGS. 1-5, the adjusting member 41 can be a rectangular block, a circular block, a polygonal block, etc. The adjusting member 41 is arranged on the side of the elastic member 100 away from the axis 7. In other words, the adjusting member 41 of the first resonance assembly 42 is arranged on the left side of the elastic member 100 of the first resonance assembly 42, and the adjusting member 41 of the second resonance assembly 43 is arranged on the right side of the elastic member 100 of the second resonance assembly 43. The matching portion 411 is matched with the mounting member 3 of the elastic member 100, so that the adjusting member 41 and the elastic member 100 are assembled into the resonance assembly 4. The adjusting member 41 is provided with a first hole 413 that penetrates the adjusting member 41 in the left-right direction, and one end of the toothbrush assembly 8 is inserted into the first hole 413 of the adjusting member 41 of the first resonance assembly 42, so as to transmit the resonance energy generated by the resonance assembly 4 to the toothbrush assembly 8.

When the inner ring 23 of the elastic member 100 is excited to rotate, the first rib 22 of the elastic member 100, the outer ring 21 of the elastic member 100 and the mounting member 3 of the elastic member 100 are driven to rotate in sequence, and then the adjustment member 41 is driven to rotate to achieve the resonance of the resonance component 4. Alternatively, when the adjustment member 41 is excited to rotate, the mounting member 3 of the elastic member 100, the outer ring 21 of the elastic member 100 and the inner ring 23 of the elastic member 100 are driven to rotate in sequence through the matching portion 411 to achieve the resonance of the resonance component 4.

The elastic member 100 of the embodiment of the present invention is provided with an outer ring 21, an inner ring 23, a first rib plate 22, a second rib plate 24, and a mounting member 3. Compared with the rotating member and the compliant member provided in the related art, the processing technology of the elastic member 100 is simplified and the processing and manufacturing cost of the elastic member 100 is reduced.

The resonance assembly 4 of the embodiment of the present invention is provided with the adjustment member 41 and the elastic member 100, which has the advantages of simple structure, stable force transmission, simple process, low cost, etc.

The electric toothbrush 10 of the embodiment of the present invention has the advantages of simple structure and low manufacturing cost.

In some embodiments, when viewed from the cross section where the extension line of the first rib 22 is located, the first rib 22 gradually expands from the inner circumference of the outer ring 21 to the outer circumference of the inner ring 23 with an orientation having a component perpendicular to the extension line of the first rib 22 . Specifically, as shown in Figure 3, from the cross-section where the first rib 22 is located, the cross-sectional area of the first rib 22 gradually decreases from the inside to the outside. In other words, the cross-sectional area of the first rib 22 connected to the inner ring 23 is larger than the cross-sectional area of the first rib 22 connected to the outer ring 21. Since the inner ring 23 drives the outer ring 21 to rotate through the first rib 22, the cross-sectional area of the first rib 22 connected to the inner ring 23 is larger, which improves the stability of the elastic member 100. The cross-sectional area of the first rib 22 connected to the outer ring 21 is smaller, which increases the elastic deformation of the first rib 22, thereby driving the outer ring 21 to rotate in the circumferential direction around the axis 1 through the first rib 22. In addition, the cross-sectional area of the first rib 22 gradually increases in the direction adjacent to the inner ring 23, which can also eliminate the stress concentration caused by the deformation of the first rib 22 and improve the fatigue life of the first rib 22.

In some embodiments, when viewed from the cross section where the extension line of the second rib 24 is located, the second rib 24 gradually expands from the inner circumference of the outer ring 21 to the outer circumference of the inner ring 23, with an orientation having a component perpendicular to the extension line of the second rib 24. Specifically, as shown in FIG3 , when viewed from the cross section where the second rib 24 is located, the cross-sectional area of the second rib 24 gradually decreases from the inside to the outside. In other words, the cross-sectional area of the second rib 24 adjacent to the inner ring 23 is larger than the cross-sectional area of the second rib 24 connected to the outer ring 21, thereby eliminating the stress concentration caused by the deformation of the second rib 24 and improving the fatigue life of the second rib 24.

In some embodiments, there are multiple first ribs 22, and the multiple first ribs 22 are arranged at intervals along the circumference of the axis 1. Specifically, as shown in FIG3, the first ribs 22 are arranged at equal intervals along the circumference of the inner ring 23, thereby improving the stability and force transmission performance of the elastic member 100, making the arrangement of the elastic member 100 more reasonable.

In some embodiments, there are multiple second ribs 24, and the multiple second ribs 24 are arranged at intervals along the circumference of the axis 1. Specifically, as shown in FIG3, the second ribs 24 are arranged at equal intervals along the circumference of the inner ring 23, thereby improving the stability and force transmission performance of the elastic member 100, making the arrangement of the elastic member 100 more reasonable.

In some embodiments, the number of the first ribs 22 is equal to the number of the second ribs 24. Therefore, when the inner ring 23 transmits force to the outer ring 21 through the first ribs 22, or transmits force to the outer ring 21 through the second ribs 24 through the mounting member 3, since the number of the first ribs 22 is equal to the number of the second ribs 24, the deformation of each position of the outer ring 21 can be made substantially consistent, so that the force on the outer ring 21 is more balanced, the stress distribution is more uniform, and the service life of the outer ring 21 is increased.

It is understandable that the number of first ribs 22 and the number of second ribs 24 in the embodiment of the present invention may also be set differently according to actual needs, for example: the number of first ribs 22 is greater than the number of second ribs 24, or the number of first ribs 22 is less than the number of second ribs 24.

In some embodiments, at least one first rib 22 is disposed between two adjacent second ribs 24, and multiple first ribs 22 and multiple second ribs 24 are disposed at equal intervals along the circumferential direction of the axis 1. Specifically, as shown in FIG3 , a first rib 22 and a second rib 24 are alternately disposed in sequence in the circumferential direction of the inner ring 23, further ensuring that the deformation of each position of the outer ring 21 is substantially consistent, making the stress distribution of the outer ring 21 more uniform, and ensuring the service life of the outer ring 21.

In some embodiments, the plurality of first ribs 22 include a first sub-rib 221, a second sub-rib 222 and a third sub-rib 223, and each of the first sub-rib 221, one end of the first sub-rib 221, one end of the second sub-rib 222 and one end of the third sub-rib 223 is operatively engaged with the inner circumference of the outer ring 21, and each of the other end of the first sub-rib 221, the other end of the second sub-rib 222 and the other end of the third sub-rib 223 is operatively engaged with the outer circumference of the inner ring 23. Specifically, as shown in FIG3 , the number of the first ribs 22 is 3, and the 3 first ribs 22 are respectively the first sub-rib 221, the second sub-rib 222 and the third sub-rib 223, and the first sub-rib 221, the second sub-rib 222 and the third sub-rib 223 are arranged at equal intervals along the circumference of the inner ring 23, so that the lines connecting the intersections of the first sub-rib 221, the second sub-rib 222 and the third sub-rib 223 at the connection points of the outer ring 21 form a triangular structure. Since the triangle has stability, the arrangement of the first sub-rib 221, the second sub-rib 222 and the third sub-rib 223 further improves the stability of the elastic member 100 and prolongs the service life. When the number of the first ribs 22 is greater than 3, not only will the rotation angle of the inner ring 23 and the outer ring 21 be limited, but also due to the limited space in the installation cavity, it is impossible to reasonably arrange the first ribs 22 in the installation cavity. When the number of the first ribs 22 is less than 3, when the elastic member 100 is stimulated to rotate, the first ribs 22 are subjected to greater stress due to the small number of the first ribs 22, which makes the first ribs 22 easily damaged, thereby reducing the service life of the elastic member 100.

In some embodiments, the plurality of second ribs 24 include a fourth sub-rib 241, a fifth sub-rib 242 and a sixth sub-rib 243, each of the fourth sub-rib 241, the fifth sub-rib 242 and the sixth sub-rib 243 having a connecting end operatively engaged with the inner circumference of the outer ring 21, and a second end spaced apart from the outer circumference of the inner ring 23 in the radial direction of the axis 1, and the first sub-rib 221, the fourth sub-rib 241, the second sub-rib 222, the fifth sub-rib 242, the third sub-rib 223 and the sixth sub-rib 243 are spaced apart in sequence in the circumferential direction of the axis 1. Specifically, as shown in FIG3 , the number of the second ribs 24 is 3, and the 3 second ribs 24 are respectively the fourth sub-rib 241, the fifth sub-rib 242 and the sixth sub-rib 243. The fourth sub-rib 241, the fifth sub-rib 242 and the sixth sub-rib 243 are arranged at equal intervals along the circumference of the inner ring 23, thereby ensuring the force transmission of the elastic member 100, further improving the stability of the elastic member 100 and extending the service life. In addition, the first sub-rib 221, the fourth sub-rib 241, the second sub-rib 222, the fifth sub-rib 242, the third sub-rib 223 and the sixth sub-rib 243 are arranged at equal intervals along the circumference of the axis 1, thereby ensuring that the stress distribution of the outer ring 21 is more uniform, ensuring the service life of the outer ring 21, and making the first rib 22 and the second rib 24 more reasonably arranged.

In some embodiments, the inner circumference of the inner ring 23 is a circular cylinder or a polygonal cylinder that does not intersect the axis 1. Specifically, the contour of the inner circumference of the inner ring 23 is circular or polygonal, so that the shaft 7 passes through the mounting hole 233 of the inner ring 23 and has an interference fit with the through hole, so that the shaft 7 drives the inner ring 23 to rotate or the inner ring 23 drives the shaft 7 to rotate.

In some embodiments, the inner circumference of the inner ring 23 includes a first surface 231 and a second surface 232, one edge of the first surface 231 is connected to one edge of the second surface 232, the other edge of the first surface 231 is connected to the other edge of the second surface 232, the first surface 231 is a plane, and the second surface 232 protrudes in the radial direction of the axis 1. Specifically, as shown in FIG3, the first surface 231 and the second surface 232 define a mounting hole 233 of the inner ring 23, the left end of the first surface 231 is connected to the left end of the second surface 232, the right end of the first surface 231 is connected to the right end of the second surface 232, the first surface 231 is horizontal, and the second surface 232 protrudes outward in the inner and outer directions, and the shaft section of the shaft 7 passing through the inner ring 23 is matched with the contour of the inner circumference of the inner ring 23, so that the shaft 7 is conveniently passed through the inner ring 23, and the assembly cost of the electric toothbrush 10 is reduced.

Preferably, the second surface 232 is an arc-shaped surface, and the central angle of the arc-shaped surface is greater than 180°, thereby ensuring that the cross-section of the shaft section passing through the inner ring 23 is not too small, thereby ensuring the rigidity of the shaft 7 and increasing the service life of the shaft 7.

In some embodiments, when viewed from the direction of the axis 1 (from left to right or from right to left), the outer peripheral surface of the outer ring 21 has a circular, elliptical or polygonal contour, and the outer peripheral surface of the mounting member 3 can have a circular, elliptical or polygonal contour. Therefore, the outer ring 21 and the mounting member 3 can be configured according to actual conditions, thereby increasing the diversity of the outer ring 21 and the mounting member 3.

In some embodiments, the matching portion 411 extends from one side of the adjustment member 41 toward the direction adjacent to the elastic member 100, and the matching portion 411 is provided with a slot 412 that matches with the mounting member 3 of the elastic member 100. Specifically, as shown in FIGS. 4-5 , the matching portion 411 protrudes from the adjustment member 41 toward one side of the elastic member 100 and extends into the mounting cavity, and the matching portion 411 is provided with a slot 412 that matches with the mounting member 3, so that the matching portion 411 and the elastic member 100 are installed into a resonance assembly 4 through the matching of the slot 412 and the mounting member 3.

Due to the layout of the first rib 22, the second rib 24, the inner ring 23 and the mounting member 3, there are more gaps in the outer ring 21. Therefore, in order to rationally utilize the space in the outer ring 21, in some embodiments, as shown in Figures 6-7, the mating portion 411 includes a first protrusion 4111 and a second protrusion 4112 extending along the axis 1. The first protrusion 4111 and the second protrusion 4112 are both arranged on one side of the main body 31 and are arranged at intervals along the circumference of the main body 31 to form a slot 412. Therefore, the first protrusion 4111 and the second protrusion 4112 can both be protrusion columns or protrusion blocks. The first protrusion 4111 and the second protrusion 4112 extend into the outer ring 21, thereby occupying the effective space in the outer ring 21. Therefore, under the same mass, the thickness of the adjustment member 41 can be reduced, the length of the resonance component 4 can be reduced, and the resonance component 4 can be made more compact. The extra space can increase the battery length (i.e., capacity), thereby improving the endurance of the electric toothbrush 10. In addition, the circumferential intervals along the axis 1 are arranged to form a slot 412, so that the mounting member 3 can be easily inserted into the slot 412. Due to the first protrusion 4111 and the second protrusion 4112, and also because the cantilevers of the first protrusion 4111 and the second protrusion 4112 are short, the bending eccentric load of the second rib plate 24 is small, the stress distribution is more uniform, and the life of the first resonance member 42 and the second resonance member 43 is improved.

In some embodiments, as shown in FIGS. 6-7 , the side of the first protrusion 4111 facing the second protrusion 4112 is the first surface, and the side of the second protrusion 4112 facing the first protrusion 4111 is the second surface. At least one of the first surface and the second surface is provided with a groove extending along the axis 1 and interlaced with the mounting member 3. Two adjacent grooves define a clamping groove 412, and the center line of the clamping groove 412 coincides with the center line of the mounting member 3. Thus, the mounting member 3 is restricted in the clamping groove 412 to prevent the drive device from moving between the first surface and the second surface during operation. In addition, when the first protrusion 4111 and the second protrusion 4112 are inserted into the outer ring 21, the two radial surfaces of the first protrusion 4111 on the axis 1 are spaced from the first rib plate 22 and the second rib plate 24, and the two radial surfaces of the second protrusion 4112 on the axis 1 are spaced from the first rib plate 22 and the second rib plate 24, thereby preventing the first protrusion 4111 and the second protrusion 4112 from affecting the rotation of the first rib plate 22 and the second rib plate 24.

In some embodiments, the slot 412 is formed on one side of the inner circumference of the matching portion 411 facing the outer ring 21. When viewed from the axis 1, the outer circumference of the matching portion 411 is arc-shaped, and the inner circumference of the slot 412 matches the outer circumference of the mounting member 3. Specifically, as shown in FIGS. 6-7, the matching portion 411 is an arc-shaped plate, and the center angle of the arc-shaped plate is greater than 180°, so that the adjusting member 41 and the rotor assembly 41 are respectively connected to the first resonant member 42 and the second resonant member 43 through the slot 412 of the matching portion 411 and the mounting member 3.

In some embodiments, there are multiple matching parts 411, and the multiple matching parts 411 are arranged at intervals along the circumferential direction of the axis 1. Specifically, as shown in Figures 5-7, the number of matching parts 411 is equal to the number of mounting members 3, so that each mounting member 3 is inserted into the matching part 411, thereby improving the force transmission performance of the first resonant member 42 and the second resonant member 43, and making the arrangement of the first resonant member 42 and the second resonant member 43 more reasonable.

It should be noted that: the present invention is based on the resonance principle to achieve reciprocating torsional vibration (swing) of the first resonant member 42 and the second resonant member 43. There is no special requirement for the shape of the adjustment member 41, and there is no requirement for the size of the first resonant member 42 and the second resonant member 43. The adjustment member 41, the first resonant member 42 and the second resonant member 43 must be designed to match the required resonant frequency. The resonant frequency calculation formula is f=1/2, k is the spring stiffness, and m is the mass. The motor 9 is powered by a battery DC power supply, so that the rotor assembly of the motor 9 is twisted, torsional vibration is generated, and the first resonant member 42 and the second resonant member 43 are torsional deformed, and finally the torsion is transmitted to the output device. When the vibration system is designed, its vibration form is a torsional vibration mode, and the phase difference of the movement direction of the first resonant member 42 and the second resonant member 43 is 180 degrees, that is, the front and rear directions are opposite. At this time, the toothbrush assembly 8 realizes rotation, the middle point of the shaft 7 is the zero point, the front and rear torques are offset, and harmful vibrations are reduced. The direction of rotation depends on the direction of power supply. The operating frequency of the electric toothbrush is mostly around 260Hz, and the rotation frequency depends on the power supply frequency.

It is worth noting that the rotor 91 of the motor 9 can be formed into an adjusting member 41 to serve as the adjusting member 41 of the second resonance component 43, thereby eliminating the need for the adjusting member 41 of the matching portion 411 of the second resonance component 43 and reducing the size of the electric toothbrush 10 in the left-right direction.

In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims (11)

1. An elastic member, characterized in that it comprises: axis; A spring unit, the spring unit comprising an outer ring with a first stiffness, a first rib with a second stiffness, and a second rib with a third stiffness, wherein the outer ring surrounds the circumference of the axis to form a closed installation cavity, and the axis passes through the center point of the installation cavity; one end of the first rib is operatively engaged with the inner circumference of the outer ring; the second rib has a first end operatively engaged with the inner circumference of the outer ring, and the second rib is spaced apart from the first rib in the circumferential direction of the axis; An inner ring disposed in the mounting cavity, the other end of the first rib plate being operatively engaged with the outer peripheral surface of the inner ring, and the inner ring having a mounting hole; It also includes a mounting member fixedly connected to the second end of the second rib plate, wherein the mounting member and the outer peripheral surface of the inner ring are spaced apart in the radial direction of the axis; When the inner ring rotates circumferentially around the axis, the first stiffness, the second stiffness and the third stiffness enable the mounting member to resist the rotation of the inner ring; or, when the mounting member rotates circumferentially around the axis, the first stiffness, the second stiffness and the third stiffness enable the inner ring to resist the rotation of the mounting member. 2. The elastic member according to claim 1, characterized in that, viewed from the cross section where the extension line of the first rib plate is located, the first rib plate gradually expands from the inner circumference of the outer ring to the outer circumference of the inner ring with an orientation perpendicular to the extension line of the first rib plate; And/or, viewed from the cross section where the extension line of the second rib is located, the second rib gradually expands from the inner circumference of the outer ring to the outer circumference of the inner ring with an orientation having a component perpendicular to the extension line of the second rib. 3. The elastic member according to claim 1 is characterized in that the number of the first ribs is multiple and the multiple first ribs are arranged at intervals along the circumference of the axis, and/or the number of the second ribs is multiple and the multiple second ribs are arranged at intervals along the circumference of the axis. 4 . The elastic member according to claim 3 , wherein the number of the first ribs is equal to the number of the second ribs. 5 . The elastic member according to claim 3 , wherein at least one of the first ribs is disposed between two adjacent second ribs, and a plurality of the first ribs and a plurality of the second ribs are disposed at equal intervals along the circumferential direction of the axis. 6. The elastic member according to claim 3, characterized in that the plurality of first ribs include a first sub-rib, a second sub-rib and a third sub-rib, each of the first sub-rib, one end of the first sub-rib, one end of the second sub-rib and one end of the third sub-rib is operatively engaged with the inner circumference of the outer ring, and each of the other end of the first sub-rib, the other end of the second sub-rib and the other end of the third sub-rib is operatively engaged with the outer circumference of the inner ring, The plurality of second ribs include a fourth sub-rib, a fifth sub-rib and a sixth sub-rib, each of the fourth sub-rib, the fifth sub-rib and the sixth sub-rib having a connecting end operatively engaged with the inner circumference of the outer ring, and a second end spaced apart from the outer circumference of the inner ring in a radial direction of the axis, and the first sub-rib, the fourth sub-rib, the second sub-rib, the fifth sub-rib, the third sub-rib and the sixth sub-rib are spaced apart in sequence in the circumferential direction of the axis. 7 . The elastic member according to claim 1 , wherein the inner circumferential surface of the inner ring is a circular cylinder or a polygonal cylinder that does not intersect the axis. 8. The elastic member according to claim 7 is characterized in that the inner circumferential surface of the inner ring includes a first surface and a second surface, one edge of the first surface is connected to one edge of the second surface, the other edge of the first surface is connected to the other edge of the second surface, the first surface is a plane, and the second surface protrudes in the radial direction of the axis. 9. The elastic member according to claim 1, characterized in that, viewed from the axial direction, the contour of the outer peripheral surface of the outer ring is circular, elliptical or polygonal. And/or, the outer peripheral contour of the mounting member may be circular, elliptical or polygonal. 10. A resonance component, characterized by comprising: An adjusting member, wherein a matching portion is provided on the adjusting member, and the adjusting member is used to adjust the resonance frequency of the resonance assembly; An elastic member, wherein the elastic member is the elastic member according to any one of claims 1 to 9, and the mounting member of the elastic member is connected to the matching portion of the adjusting member; When the inner ring of the elastic member is excited to rotate, the first rib plate of the elastic member, the outer ring of the elastic member, the second rib plate of the elastic member and the mounting member of the elastic member are driven to rotate in sequence, thereby driving the adjusting member to rotate. Alternatively, when the adjusting member is excited to rotate, the mounting member of the elastic member, the second rib plate of the elastic member, the outer ring of the elastic member and the inner ring of the elastic member are driven to rotate in sequence through the matching portion. 11 . The resonance assembly according to claim 10 , wherein the matching portion extends from one side of the adjustment member toward a direction adjacent to the elastic member, and the matching portion is provided with a slot matching with a mounting member of the elastic member.