Elastic member and resonant assembly

Abstract

The application discloses an elastic piece and a resonance assembly, and the elastic piece comprises an axis, a spring unit, an inner ring arranged in a mounting cavity, and a mounting piece fixedly connected with a second end of a second muscle plate, the spring unit comprises an outer ring with a first rigidity, a first muscle plate with a second rigidity, and a second muscle plate with a third rigidity, wherein the outer ring is annularly arranged along the circumference of the axis to form a closed mounting cavity, and the axis passes through the center point of the mounting cavity; one end of the first muscle plate is operatively engaged with the inner circumferential surface of the outer ring; the second muscle plate has a first end operatively engaged with the inner circumferential surface of the outer ring, and a second end arranged in a radial direction of the axis and spaced from the outer circumferential surface of the inner ring, the second muscle plate is arranged in a spaced manner with the first muscle plate in the circumferential direction of the axis, the other end of the first muscle plate is operatively engaged with the outer circumferential surface of the inner ring, the inner ring is provided with a mounting hole, and the mounting piece is close to the inner ring. The application has the advantages of simple structure, low cost and the like.

Description

Technical Field

[0001] This invention relates to a personal care device, specifically to an elastic element and a resonant assembly. Background Technology

[0002] Electric toothbrushes use a motor to drive a spring, causing the brush head to vibrate at high frequency. This breaks down toothpaste into fine foam, which is then used to thoroughly clean between teeth, thus whitening them.

[0003] Among related technologies, the spring structure of electric toothbrushes has a complex manufacturing process and high processing and manufacturing costs. Summary of the Invention

[0004] This invention is based on the inventor's discoveries and understanding of the following facts and problems:

[0005] In related technologies, the spring structure of electric toothbrushes has a complex manufacturing process. For example, patent number CN113543748A - Flexible Spring and Motor Assembly, which sets multiple protrusions on the rotating component, has a high processing cost and a complex manufacturing process.

[0006] The present invention aims to at least partially solve one of the technical problems in the related art.

[0007] Therefore, embodiments of the present invention propose an elastic element with a simple structure and low cost.

[0008] This invention provides a resonant component that is simple to assemble and has a simple structure.

[0009] An elastic element according to an embodiment of the present invention includes: an axis; a spring unit, the spring unit including an outer ring having a first stiffness, a first stiffener having a second stiffness, and a second stiffener having a third stiffness, wherein the outer ring is circumferentially arranged to form a closed mounting cavity along the axis, the axis passing through the center point of the mounting cavity; one end of the first stiffener is operatively engaged with the inner circumferential surface of the outer ring; the second stiffener has a first end operatively engaged with the inner circumferential surface of the outer ring, and the second stiffener and the first stiffener are spaced apart in the circumferential direction of the axis; disposed on the mounting cavity. The cavity includes an inner ring, with the other end of the first stiffener operably engaged with the outer circumferential 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 stiffener, the mounting member being spaced apart from the outer circumferential surface of the inner ring 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 cause 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 cause the inner ring to resist the rotation of the mounting member.

[0010] The elastic component of this invention comprises an outer ring, an inner ring, a first stiffener, a second stiffener, and an mounting component, which simplifies the processing technology of the elastic component and reduces its manufacturing cost.

[0011] In some embodiments, viewed in a cross-section where the extension line of the first stiffener is located, the first stiffener gradually unfolds from the inner circumferential surface of the outer ring to the outer circumferential surface of the inner ring, having an orientation perpendicular to the extension line of the first stiffener and / or, viewed in a cross-section where the extension line of the second stiffener is located, the second stiffener gradually unfolds from the inner circumferential surface of the outer ring to the outer circumferential surface of the inner ring, having an orientation perpendicular to the extension line of the second stiffener.

[0012] In some embodiments, there are multiple first stiffeners, which are circumferentially spaced along the axis, and / or there are multiple second stiffeners, which are circumferentially spaced along the axis.

[0013] In some embodiments, the number of the first stiffeners and the number of the second stiffeners are equal.

[0014] In some embodiments, at least one first stiffener is disposed between two adjacent second stiffeners, and a plurality of first stiffeners and a plurality of second stiffeners are disposed at equal intervals along the circumference of the axis.

[0015] In some embodiments, the plurality of first stiffeners include a first sub-stiffener, a second sub-stiffener, and a third sub-stiffener, each of the first sub-stiffener, one end of the first sub-stiffener, one end of the second sub-stiffener, and one end of the third sub-stiffener being operatively engaged with the inner circumferential surface of the outer ring, and each of the other ends of the first sub-stiffener, the second sub-stiffener, and the third sub-stiffener being operatively engaged with the outer circumferential surface of the inner ring. The plurality of second stiffeners include a fourth sub-stiffener, a fifth sub-stiffener, and a sixth sub-stiffener, each of the fourth sub-stiffener, the fifth sub-stiffener, and the sixth sub-stiffener having a connecting end operatively engaged with the inner circumferential surface of the outer ring, and a second end spaced radially from the outer circumferential surface of the inner ring along the axis. The first sub-stiffener, the fourth sub-stiffener, the second sub-stiffener, the fifth sub-stiffener, the third sub-stiffener, and the sixth sub-stiffener are sequentially spaced apart in the circumferential direction of the axis.

[0016] In some embodiments, the inner circumferential surface of the inner ring is a circular cylindrical surface or a polygonal cylindrical surface that does not intersect the axis.

[0017] 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, and another edge of the first surface is connected to another edge of the second surface. The first surface is a plane, and the second surface protrudes in the radial direction along the axis.

[0018] In some embodiments, the outline of the outer peripheral surface of the outer ring is circular, elliptical, or polygonal when viewed from the axial direction, and / or the outer peripheral outline of the mounting member can be circular, elliptical, or polygonal.

[0019] According to an embodiment of the present invention, a resonant assembly includes: an adjusting member having a mating portion thereon, the adjusting member being used to adjust the resonant frequency of the resonant assembly; and an elastic member, the elastic member being any of the elastic members described in the above embodiments, the mounting portion of the elastic member being connected to the mating portion of the adjusting member; when the inner ring of the elastic member is excited to rotate, it sequentially drives the first stiffener of the elastic member, the outer ring of the elastic member, the second stiffener of the elastic member, and the mounting portion of the elastic member to rotate, thereby driving the adjusting member to rotate; or, when the adjusting member is excited to rotate, the mounting portion of the elastic member, the second stiffener of the elastic member, the outer ring of the elastic member, and the inner ring of the elastic member to rotate sequentially through the mating portion.

[0020] In some embodiments, the mating portion extends from one side of the adjusting member toward a direction adjacent to the elastic member, and the mating portion is provided with a groove that mates with the mounting part of the elastic member. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of an electric toothbrush according to an embodiment of the present invention.

[0022] Figure 2 This is an exploded view of an electric toothbrush according to an embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the structure of the elastic element according to an embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the structure of the first type of adjustment component according to an embodiment of the present invention.

[0025] Figure 5 This is a schematic diagram of the installation of the first type of adjusting member and elastic member according to an embodiment of the present invention.

[0026] Figure 6 This is a schematic diagram of the structure of the second type of adjustment component according to an embodiment of the present invention.

[0027] Figure 7 This is a front view of the second type of adjustment component according to an embodiment of the present invention.

[0028] Elastic element 100;

[0029] 10 electric toothbrushes;

[0030] Axis 1;

[0031] Spring unit 2; outer ring 21; first stiffener 22; first sub-stiffener 221; second sub-stiffener 222; third sub-stiffener 223; inner ring 23; first surface 231; second surface 232; mounting hole 233; second stiffener 24; fourth sub-stiffener 241; fifth sub-stiffener 242; sixth sub-stiffener 243; mounting component 3; resonance assembly 4; adjusting component 41; mating part 411; first protrusion 4111; second protrusion 4112; slot 412; first hole 413;

[0032] First resonant component 42; Second resonant component 43;

[0033] Casing 5;

[0034] Support frame 6; Shaft 7; Resonance assembly 8; Motor 9; Rotor 91;

[0035] Toothbrush component 101. Detailed Implementation

[0036] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] An electric toothbrush according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0038] like Figure 1-7 As shown, the electric toothbrush according to an embodiment of the present invention includes a housing 5, a support frame 6, a shaft 7, a resonance assembly 4, a motor 9, and a toothbrush assembly 8.

[0039] The support frame 6 is supported within the housing 5, and the shaft 7 is rotatably mounted on the support frame 6. Specifically, as shown... Figure 1-2 As shown, the support frame 6 is fixed inside the housing 5. The support frame 6 has a second hole (not shown in the figure) that passes through the support frame 6 in the left and right direction. The diameter of the second hole is larger than the outer diameter of the shaft 7, so that the shaft 7 can be rotatably inserted into the second hole.

[0040] Resonance assembly 4 includes a first resonance assembly 42 and a second resonance assembly 43. The first resonance assembly 42 passes through the shaft 7 so that the first resonance assembly 42 drives the shaft 7 to rotate. The second resonance assembly 43 passes through 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 housing 5 are radially aligned with axis 1 (e.g., ...). Figure 3 The outer peripheral surface of the second resonant component 43 and the inner peripheral surface of the housing 5 are arranged at intervals along the radial direction of axis 1, as shown in the inner and outer directions. Specifically, as shown in the inner and outer directions of the housing 5, the outer peripheral surface of the second resonant component 43 and the inner peripheral surface of the housing 5 are arranged at intervals along the radial direction of axis 1. Figure 1-2 As shown, the first resonance component 42 and the second resonance component 43 are both mounted on the shaft 7. The first resonance component 42 is located on the left side of the support frame 6, and the second resonance component 43 is located on the right side of the support frame 6, so that the first resonance component 42 and the second resonance component 43 are suspended in the housing 5 by the support frame 6.

[0041] The motor 9 is housed inside the housing 5 and is connected to the second resonant assembly 43 so that the motor 9 drives the second resonant assembly 43 to rotate, thereby driving the first resonant assembly 42 via the drive shaft 7. Specifically, as shown... Figure 1 As shown, the motor 9 is located on the right side of the second resonant component 43 and is connected to the second resonant component 43, thereby driving the shaft 7 to rotate through the second resonant component 43, and the shaft 7 drives the second resonant component 43.

[0042] By adjusting the frequency of the motor 9, the first resonant component 42 and the second resonant component 43 can resonate. The first resonant component 42 and the second resonant component 43 rotate in opposite directions. In other words, the first resonant component 42 rotates clockwise and the second resonant component 43 rotates counterclockwise, or the first resonant component 42 rotates counterclockwise and the second resonant component 43 rotates clockwise, so that the first resonant component 42 and the second resonant component 43 resonate. Moreover, this opposite rotation reduces the transmission of torsional vibrations that may be transmitted to the user during operation.

[0043] The toothbrush assembly 8 is connected to the second resonant assembly 43 so that the second resonant assembly 43 drives the toothbrush assembly 8 to vibrate. Specifically, as shown in... Figure 1-2 As shown, the toothbrush assembly 8 is located to the left of the second resonant assembly 43 and is connected to the second resonant assembly 43. This causes the motor 9 to generate high-frequency vibrations that are transmitted to the toothbrush assembly 8 so that the toothbrush assembly 8 can clean a person's teeth.

[0044] At least one of the first resonance component 42 and the second resonance component 43 includes an elastic element 100 and an adjustment element 41. The elastic element 100 includes an axis 1, a spring unit 2, an inner ring 23 disposed in the mounting cavity, and a mounting element 3 fixedly connected to the second end of the second stiffener 24.

[0045] The spring unit 2 includes an outer ring 21 with a first stiffness, a first stiffener 22 with a second stiffness, and a second stiffener 24 with a third stiffness. The outer ring 21 forms a closed mounting cavity around an axis 1 in the circumferential direction, with the axis 1 passing through the center point of the mounting cavity. One end of the first stiffener 22 is operatively engaged with the inner circumferential surface of the outer ring 21. Specifically, as... Figure 3 As shown, the outer periphery of the outer ring 21 can be any of the following: circular ring, elliptical ring, or polygonal ring. One end of the first stiffener 22 is connected to the inner periphery of the outer ring 21.

[0046] The second stiffener 24 has a first end that operatively engages with the inner circumferential surface of the outer ring 21, and a second end that is spaced apart from the outer circumferential surface of the inner ring 23 along the radial direction of axis 1. The second stiffener 24 and the first stiffener 22 are spaced apart in the circumferential direction of axis 1. Specifically, as shown... Figure 3 As shown, the first end of the second stiffener 24 is connected to the inner circumferential surface of the outer ring 21, the second end of the second stiffener 24 is spaced apart from the outer circumferential surface of the inner ring 23 in the inward and outward directions, and the first stiffener 22 and the second stiffener 24 are spaced apart in the circumferential direction of the outer ring 21.

[0047] The other end of the first stiffening plate 22 is operatively engaged with the outer peripheral surface of the inner ring 23, which has a mounting hole 233. Specifically, as shown... Figure 3 As shown, the inner ring 23 includes, but is not limited to, rectangular blocks, cylindrical blocks, elliptical cylinder blocks, polygonal blocks, etc. The inner ring 23 is disposed within the mounting cavity, and the outer circumferential surface of the inner ring 23 and the inner circumferential surface of the outer ring 21 are radially spaced along axis 1. The inner ring 23 has features along axis 1 (e.g., Figure 1 The mounting hole 233 of the inner ring 23 (shown in the left-right direction) passes through the shaft 7, which is inserted into 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.

[0048] Mounting component 3 and the outer circumferential surface of inner ring 23 are in the radial direction of axis 1 (e.g., Figure 3 The intervals are set in the inward and outward directions (as shown). Specifically, as... Figure 3 As shown, the mounting component 3 is fixed to the second end of the second stiffener 24 and is located in the mounting cavity. The outer peripheral surface of the mounting component 3 and the outer peripheral surface of the inner ring 23 are spaced apart along the inner and outer directions.

[0049] The outer ring 21 has a first stiffness, the first stiffener 22 has a second stiffness, and the second stiffener 24 has a third stiffness. When the inner ring 23 rotates around the axis 1, the first stiffness, the second stiffness, and the third stiffness make the mounting member 3 resist the rotation of the inner ring 23; or, when the mounting member 3 rotates around the axis 1, the first stiffness, the second stiffness, and the third stiffness make the inner ring 23 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 stiffener 22 to rotate. The first stiffener 22 will drive the outer ring 21 to rotate, and the outer ring 21 will drive the second stiffener 24 to rotate. Since the outer ring 21 has a first stiffness, the first stiffener 22 has a second stiffness, and the second stiffener 24 has a third stiffness, the outer ring 21, the first stiffener 22, and the second stiffener 24 can undergo elastic deformation to resist the rotation of the inner ring 23. Or, when the mounting part 3 rotates, it will sequentially drive the second stiffener 24, the outer ring 21, and the first stiffener 22 to rotate. Since the outer ring 21 has a first stiffness, the first stiffener 22 has a second stiffness, and the second stiffener 24 has a third stiffness, the outer ring 21, the first stiffener 22, and the second stiffener 24 can undergo elastic deformation to resist the rotation of the mounting part 3.

[0050] It is worth noting that the magnitudes of the first stiffness, the second stiffness, and the third stiffness can be equal or unequal. This embodiment of the invention does not impose any restrictions and can be set according to the actual situation.

[0051] The adjusting member 41 is provided with a mating part 411, and the mounting part 3 of the elastic member 100 is connected to the mating part 411 of the adjusting member 41. The adjusting member 41 is used to adjust the resonant frequency of the resonant assembly 4. Specifically, as shown in... Figure 1-5 As shown, the adjustment member 41 can be a rectangular block, a circular block, a polygonal block, etc. The adjustment member 41 is located on the side of the elastic member 100 away from the axis 7. In other words, the adjustment member 41 of the first resonance component 42 is located on the left side of the elastic member 100 of the first resonance component 42, and the adjustment member 41 of the second resonance component 43 is located on the right side of the elastic member 100 of the second resonance component 43. The adjustment member 41 is assembled with the mounting member 3 of the elastic member 100 through the mating part 411, so that the adjustment member 41 and the elastic member 100 are assembled into the resonance component 4. The adjustment member 41 is provided with a first hole 413 that penetrates the adjustment member 41 in the left-right direction. One end of the toothbrush component 8 is inserted into the first hole 413 of the adjustment member 41 of the first resonance component 42 so as to transfer the resonance energy generated by the resonance component 4 to the toothbrush component 8.

[0052] When the inner ring 23 of the elastic element 100 is excited to rotate, it sequentially drives the first stiffener 22 of the elastic element 100, the outer ring 21 of the elastic element 100, and the mounting part 3 of the elastic element 100 to rotate, thereby driving the adjusting part 41 to rotate, so as to realize the resonance of the resonance assembly 4. Alternatively, when the adjusting part 41 is excited to rotate, it sequentially drives the mounting part 3 of the elastic element 100, the outer ring 21 of the elastic element 100, and the inner ring 23 of the elastic element 100 to rotate through the mating part 411, so as to realize the resonance of the resonance assembly 4.

[0053] The elastic member 100 of this embodiment of the invention is provided with an outer ring 21, an inner ring 23, a first stiffener 22, a second stiffener 24, and a mounting member 3. Compared with the rotating member and yielding 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.

[0054] The resonant component 4 of this invention, which includes an adjustment component 41 and an elastic component 100, has the advantages of simple structure, stable force transmission, simple process, and low cost.

[0055] The electric toothbrush 10 of this invention has the advantages of simple structure and low manufacturing cost.

[0056] In some embodiments, viewed in a cross-section along the extension line of the first stiffener 22, the first stiffener 22 gradually unfolds from the inner circumferential surface of the outer ring 21 to the outer circumferential surface of the inner ring 23, having an orientation perpendicular to the extension line of the first stiffener 22. Specifically, as... Figure 3 As shown, in the cross-section where the first stiffener 22 is located, the cross-sectional area of ​​the first stiffener 22 gradually decreases from the inside to the outside. In other words, the cross-sectional area of ​​the first stiffener 22 connected to the inner ring 23 is greater than the cross-sectional area of ​​the first stiffener 22 connected to the outer ring 21. Since the inner ring 23 drives the outer ring 21 to rotate through the first stiffener 22, the larger cross-sectional area of ​​the first stiffener 22 connected to the inner ring 23 improves the stability of the elastic element 100. The smaller cross-sectional area of ​​the first stiffener 22 connected to the outer ring 21 increases the elastic deformation of the first stiffener 22, thereby driving the outer ring 21 to rotate around the circumferential direction of axis 1. In addition, the cross-sectional area of ​​the first stiffener 22 gradually increases along the direction adjacent to the inner ring 23, which can also eliminate the stress concentration caused by the deformation of the first stiffener 22 and improve the fatigue life of the first stiffener 22.

[0057] In some embodiments, viewed in a cross-section where the extension line of the second stiffener 24 lies, the second stiffener 24 gradually unfolds from the inner circumferential surface of the outer ring 21 to the outer circumferential surface of the inner ring 23, having an orientation perpendicular to the extension line of the second stiffener 24. Specifically, as... Figure 3As shown, when viewed from the cross-section where the second stiffener 24 is located, the cross-sectional area of ​​the second stiffener 24 gradually decreases from the inside to the outside. In other words, the cross-sectional area of ​​the second stiffener 24 adjacent to the inner ring 23 is greater than the cross-sectional area of ​​the second stiffener 24 connected to the outer ring 21, thereby eliminating stress concentration caused by deformation of the second stiffener 24 and improving the fatigue life of the second stiffener 24.

[0058] In some embodiments, there are multiple first stiffeners 22, and the multiple first stiffeners 22 are arranged at circumferential intervals along axis 1. Specifically, as shown in the figure... Figure 3 As shown, the first stiffener 22 is arranged at equal intervals along the circumference of the inner ring 23, thereby improving the stability and force transmission performance of the elastic element 100 and making the arrangement of the elastic element 100 more reasonable.

[0059] In some embodiments, there are multiple second stiffeners 24, and the multiple second stiffeners 24 are arranged at circumferential intervals along axis 1. Specifically, as shown in the figure... Figure 3 As shown, the second stiffener 24 is arranged at equal intervals along the circumference of the inner ring 23, thereby improving the stability and force transmission performance of the elastic element 100 and making the arrangement of the elastic element 100 more reasonable.

[0060] In some embodiments, the number of first stiffeners 22 and the number of second stiffeners 24 are equal. Therefore, when the inner ring 23 transmits force to the outer ring 21 through the first stiffeners 22, or through the mounting member 3 via the second stiffeners 24, the equal number of first stiffeners 22 and second stiffeners 24 ensures that the deformation at each position of the outer ring 21 is substantially uniform, resulting in a more balanced stress distribution and improved service life of the outer ring 21.

[0061] It is understood that the number of first stiffeners 22 and the number of second stiffeners 24 in the embodiments of the present invention may also be set differently according to actual needs. For example, the number of first stiffeners 22 may be greater than the number of second stiffeners 24, or the number of first stiffeners 22 may be less than the number of second stiffeners 24.

[0062] In some embodiments, at least one first stiffener 22 is disposed between two adjacent second stiffeners 24, and the plurality of first stiffeners 22 and the plurality of second stiffeners 24 are all equally spaced along the circumferential direction of axis 1. Specifically, as Figure 3 As shown, a first stiffener 22 and a second stiffener 24 are alternately arranged in the circumferential direction of the inner ring 23, which further ensures that the deformation of each position of the outer ring 21 is roughly the same, making the stress distribution on the outer ring 21 more uniform and ensuring the service life of the outer ring 21.

[0063] In some embodiments, the plurality of first stiffeners 22 include a first sub-stiffener 221, a second sub-stiffener 222, and a third sub-stiffener 223. Each of the first sub-stiffener 221, one end of the first sub-stiffener 221, one end of the second sub-stiffener 222, and one end of the third sub-stiffener 223 is operatively engaged with the inner circumferential surface of the outer ring 21, and each of the other ends of the first sub-stiffener 221, the second sub-stiffener 222, and the third sub-stiffener 223 is operatively engaged with the outer circumferential surface of the inner ring 23. Specifically, as Figure 3 As shown, there are three first stiffeners 22, namely a first sub-stiffener 221, a second sub-stiffener 222, and a third sub-stiffener 223. These three sub-stiffeners 221, 222, and 223 are evenly spaced along the circumference of the inner ring 23. Thus, the line connecting the intersection points of the first sub-stiffeners 221, 222, and 223 at the connection point of the outer ring 21 forms a triangular structure. Due to the stability of triangles, the arrangement of the first sub-stiffeners 221, 222, and 223 further improves the stability of the elastic element 100 and extends its service life. When the number of first stiffeners 22 exceeds three, it not only restricts the rotation angle of the inner ring 23 and the outer ring 21, but also, due to the limited space within the mounting cavity, it is impossible to reasonably arrange the first stiffeners 22 within the mounting cavity. When the number of first stiffeners 22 is less than 3, when the elastic element 100 is excited to rotate, the stress on the first stiffeners 22 is greater due to the small number of first stiffeners 22, which makes the first stiffeners 22 easy to be damaged, thus reducing the service life of the elastic element 100.

[0064] In some embodiments, the plurality of second stiffeners 24 include a fourth sub-stiffener 241, a fifth sub-stiffener 242, and a sixth sub-stiffener 243. Each of the fourth sub-stiffener 241, the fifth sub-stiffener 242, and the sixth sub-stiffener 243 has a connecting end operatively engaged with the inner circumferential surface of the outer ring 21, and a second end spaced apart from the outer circumferential surface of the inner ring 23 in the radial direction along axis 1. The first sub-stiffener 221, the fourth sub-stiffener 241, the second sub-stiffener 222, the fifth sub-stiffener 242, the third sub-stiffener 223, and the sixth sub-stiffener 243 are sequentially spaced apart in the circumferential direction along axis 1. Specifically, as shown... Figure 3As shown, there are three second stiffening plates 24, namely the fourth sub-stiffening plate 241, the fifth sub-stiffening plate 242, and the sixth sub-stiffening plate 243. These three plates are arranged at equal intervals along the circumference of the inner ring 23, thus ensuring the force transmission of the elastic element 100, further improving its stability, and extending its service life. Furthermore, the first sub-stiffening plate 221, the fourth sub-stiffening plate 241, the second sub-stiffening plate 222, the fifth sub-stiffening plate 242, the third sub-stiffening plate 223, and the sixth sub-stiffening plate 243 are arranged at equal intervals along the circumference of axis 1. This ensures a more uniform stress distribution on the outer ring 21, extending its service life and making the arrangement of the first stiffening plates 22 and the second stiffening plates 24 more rational.

[0065] In some embodiments, the inner circumferential surface of the inner ring 23 is a circular or polygonal cylindrical surface that does not intersect with the axis 1. Specifically, the outline of the inner circumferential surface 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 is interference-fitted with the through hole, thereby causing the shaft 7 to drive the inner ring 23 to rotate or the inner ring 23 to drive the shaft 7 to rotate.

[0066] In some embodiments, the inner circumferential surface 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, and the other edge of the first surface 231 is connected to the other edge of the second surface 232. The first surface 231 is planar, and the second surface 232 protrudes radially along axis 1. Specifically, as shown... Figure 3 As shown, the first surface 231 and the second surface 232 define the 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, and 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 inward and outward directions. The shaft segment of the shaft 7 passing through the inner ring 23 matches the contour of the inner circumferential surface of the inner ring 23, thereby facilitating the shaft 7 to pass through the inner ring 23 and reducing the assembly cost of the electric toothbrush 10.

[0067] Preferably, the second surface 232 is an arc-shaped surface, and the central angle of the arc-shaped surface is greater than 180°. This ensures that the cross-section of the shaft segment passing through the inner ring 23 is not too small, thereby ensuring the rigidity of the shaft 7 and improving the service life of the shaft 7.

[0068] In some embodiments, when viewed from the axis 1 (from left to right or right to left), the outer periphery of the outer ring 21 has a circular, elliptical, or polygonal outline, and the outer periphery of the mounting member 3 can also be circular, elliptical, or polygonal. Therefore, the outer ring 21 and the mounting member 3 can be configured according to actual conditions, increasing the diversity of the outer ring 21 and the mounting member 3.

[0069] In some embodiments, the mating portion 411 extends from one side of the adjusting member 41 toward the adjacent elastic member 100, and the mating portion 411 is provided with a groove 412 that mates with the mounting member 3 of the elastic member 100. Specifically, as Figure 4-5 As shown, the mating part 411 protrudes from the side of the adjusting member 41 toward the elastic member 100 and extends into the mounting cavity. The mating part 411 is provided with a slot 412 that mates with the mounting member 3. Thus, through the mating of the slot 412 and the mounting member 3, the mating part 411 and the elastic member 100 are mounted to form a resonant assembly 4.

[0070] Due to the arrangement of the first stiffening plate 22, the second stiffening plate 24, the inner ring 23, and the mounting component 3, there are relatively many gaps inside the outer ring 21. Therefore, in order to make reasonable use of the space inside the outer ring 21, in some embodiments, such as... Figure 6-7 As shown, the mating part 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 provided on one side of the body 31 and are spaced apart along the circumference of the body 31 to form a slot 412. Therefore, both the first protrusion 4111 and the second protrusion 4112 can be protruding pillars or protruding blocks. The first protrusion 4111 and the second protrusion 4112 extend into the outer ring 21, thereby occupying the effective space within the outer ring 21. Consequently, under the same mass, the thickness of the adjusting member 41 can be reduced, and the length of the resonant component 4 can be reduced, making the resonant component 4 more compact. The extra space can increase the battery length (i.e., capacity), improving the battery life of the electric toothbrush 10. In addition, the slots 412 are arranged circumferentially along the axis 1 to form slots, which facilitates the insertion of the mounting member 3 into the slots 412. Due to the short cantilever of the first protrusion 4111 and the second protrusion 4112, the bending eccentric load of the second stiffener 24 is small, the stress distribution is more uniform, and the lifespan of the first resonant component 42 and the second resonant component 43 is improved.

[0071] In some embodiments, such as Figure 6-7As shown, 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 axis 1 and integrally inserted with the mounting member 3. Two adjacent grooves define a slot 412, and the center line of the slot 412 coincides with the center line of the mounting member 3. Thus, the mounting member 3 is confined within the slot 412, preventing 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 axis 1 are spaced apart from the first rib 22 and the second rib 24, and the two radial surfaces of the second protrusion 4112 on axis 1 are spaced apart from the first rib 22 and the second rib 24, thereby preventing the first protrusion 4111 and the second protrusion 4112 from affecting the rotation of the first rib 22 and the second rib 24.

[0072] In some embodiments, a slot 412 is formed on the side of the mating portion 411 facing the inner peripheral surface of the outer ring 21. Viewed from the axis 1, the outer peripheral contour of the mating portion 411 is arc-shaped, and the inner peripheral surface contour of the slot 412 matches the outer peripheral surface of the mounting member 3. Specifically, as... Figure 6-7 As shown, the mating part 411 is an arc-shaped plate with a central angle greater than 180°. Thus, the mating part 411 engages with the mounting part 3 through the slot 412, so that the adjusting part 41 and the rotor assembly 41 are connected to the first resonant part 42 and the second resonant part 43 respectively.

[0073] In some embodiments, there are multiple mating portions 411, and the multiple mating portions 411 are arranged at circumferential intervals along axis 1. Specifically, as shown in the figure... Figure 5-7 As shown, the number of mating parts 411 is equal to the number of mounting parts 3, so that each mounting part 3 is inserted into the mating part 411, thereby improving the force transmission performance of the first resonant 42 and the second resonant 43, and making the arrangement of the first resonant 42 and the second resonant 43 more reasonable.

[0074] It should be noted that this invention is based on the principle of resonance, realizing the reciprocating torsional vibration (oscillation) of the first resonant element 42 and the second resonant element 43. The shape of the adjusting element 41 has no special requirements, and the dimensions of the first resonant element 42 and the second resonant element 43 are not specified. The adjusting element 41, the first resonant element 42, and the second resonant element 43 must be designed to match the required resonance frequency. The resonance frequency calculation formula is f = 1 / 2, where k is the spring stiffness and m is the mass. Power is supplied to the motor 9 via a DC battery, causing the rotor assembly of the motor 9 to twist, generating torsional vibration and causing the first resonant element 42 and the second resonant element 43 to undergo torsional deformation. The torsion is ultimately transmitted to the output device. In the design of the vibration system, the vibration mode is torsional, and the movement directions of the first resonant element 42 and the second resonant element 43 are 180 degrees out of phase, i.e., opposite in direction. At this time, the toothbrush assembly 8 rotates, the midpoint of the shaft 7 is zero, and the front and rear torques cancel each other out, reducing harmful vibration. The rotation direction depends on the power supply direction. The operating frequency of electric toothbrushes is mostly around 260Hz, and the rotation frequency depends on the power supply frequency.

[0075] It is worth noting that the rotor 91 of the motor 9 can be formed as an adjustment member 41 to serve as the adjustment member 41 of the second resonance assembly 43, thereby eliminating the need for the adjustment member 41 of the mating part 411 of the second resonance assembly 43 and reducing the size of the electric toothbrush 10 in the left-right direction.

[0076] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0077] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0078] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0079] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0080] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0081] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An elastic member characterized by, include: Axis; A spring unit includes an outer ring having a first stiffness, a first stiffener having a second stiffness, and a second stiffener having a third stiffness. The outer ring is circumferentially arranged to form a closed mounting cavity along an axis, the axis passing through the center point of the mounting cavity. One end of the first stiffener is operatively engaged with the inner circumferential surface of the outer ring. The second stiffener has a first end operatively engaged with the inner circumferential surface of the outer ring. The second stiffener and the first stiffener are spaced apart in the circumferential direction of the axis. An inner ring is disposed in the mounting cavity, the other end of the first stiffener is operatively engaged with the outer peripheral surface of the inner ring, and the inner ring has mounting holes; It also includes a mounting component that is fixedly connected to the second end of the second stiffener, the mounting component being spaced apart from the outer circumferential surface of the inner ring 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 cause 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 cause the inner ring to resist the rotation of the mounting member.

2. The elastic member of claim 1, wherein Viewed in the cross section where the extension line of the first stiffener is located, the first stiffener gradually unfolds from the inner circumferential surface of the outer ring to the outer circumferential surface of the inner ring, with an orientation perpendicular to the extension line of the first stiffener. And / or, in a cross-section where the extension line of the second stiffener is located, the second stiffener gradually unfolds from the inner circumferential surface of the outer ring to the outer circumferential surface of the inner ring, having an orientation perpendicular to the extension line of the second stiffener.

3. The elastic element according to claim 1, characterized in that, There are multiple first stiffeners, which are spaced apart circumferentially along the axis, and / or there are multiple second stiffeners, which are spaced apart circumferentially along the axis.

4. The elastic element according to claim 3, characterized in that, The number of the first stiffener plate and the number of the second stiffener plate are equal.

5. The elastic member according to claim 3 or 4, characterized in that, At least one first stiffener is disposed between two adjacent second stiffeners, and multiple first stiffeners and multiple second stiffeners are equally spaced along the circumference of the axis.

6. The elastic element according to claim 3, characterized in that, The plurality of first stiffening plates include a first sub-stiffening plate, a second sub-stiffening plate, and a third sub-stiffening plate, each of the first sub-stiffening plate, one end of the first sub-stiffening plate, one end of the second sub-stiffening plate, and one end of the third sub-stiffening plate being operatively engaged with the inner circumferential surface of the outer ring, and each of the other ends of the first sub-stiffening plate, the second sub-stiffening plate, and the third sub-stiffening plate being operatively engaged with the outer circumferential surface of the inner ring. The plurality of second stiffeners include a fourth sub-stiffener, a fifth sub-stiffener, and a sixth sub-stiffener, each of the fourth, fifth, and sixth sub-stiffeners having a connecting end operatively engaged with the inner circumferential surface of the outer ring, and a second end spaced radially from the outer circumferential surface of the inner ring along the axis. The first, fourth, second, fifth, third, and sixth sub-stiffeners are sequentially spaced apart in the circumferential direction of the axis.

7. The elastic element according to claim 1, characterized in that, The inner circumferential surface of the inner ring is a circular or polygonal cylindrical surface that does not intersect the axis.

8. The elastic element according to claim 7, 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, and 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 along the axis.

9. The elastic element according to claim 1, characterized in that, Viewed along the axial direction, the outline of the outer circumference of the outer ring is circular, elliptical, or polygonal. And / or, the outer periphery of the mounting component is circular, elliptical, or polygonal.

10. A resonant component, characterized in that, include: An adjustment component is provided with a mating part, and the adjustment component is used to adjust the resonant frequency of the resonant assembly; The elastic element is as described in claim 1 above. The elastic member described in any one of the nine items, wherein the mounting part of the elastic member is connected to the mating part of the adjusting member; When the inner ring of the elastic element is energized to rotate, it sequentially drives the first stiffener plate of the elastic element, the outer ring of the elastic element, the second stiffener plate of the elastic element, and the mounting part of the elastic element to rotate, thereby driving the adjusting part to rotate. Alternatively, when the adjusting part is energized to rotate, it sequentially drives the mounting part of the elastic element, the second stiffener plate of the elastic element, the outer ring of the elastic element, and the inner ring of the elastic element to rotate through the mating part.

11. The resonant assembly according to claim 10, characterized in that, The mating portion extends from one side of the adjusting member toward the adjacent elastic member, and the mating portion is provided with a groove that mates with the mounting part of the elastic member.

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