Weight-reducing rotating shaft of electric toothbrush motor

Abstract

The utility model discloses an electric toothbrush motor weight reduction rotating shaft which comprises a rotating shaft body, the rotating shaft body sequentially comprises a first body, a second body and a third body from left to right, the first body, the second body and the third body are matched in shape, the upper end of the first body is provided with a first shaft flat portion which is concave inwards, and the lower end of the first body is provided with a second shaft flat portion which is concave inwards. A first connecting part is arranged between the first body and the second body, a motor combining part is arranged on the periphery of the right end of the second body, a second connecting part is arranged between the second body and the third body, and an anti-skid part is arranged on the periphery of the right side of the third body. The rotary shaft is simple in structure, capable of being accurately machined, light in weight, capable of reducing inertia and capable of guaranteeing rigidity and stability of the rotary shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of motor shafts, in particular to a weight-reducing shaft for an electric toothbrush motor. Background Art

[0002] The motor shaft of an electric toothbrush provides power to rotate or vibrate the toothbrush head at high speed to effectively clean the tooth surface and gums. The shaft is driven by electricity, transferring energy to the toothbrush head, helping users brush their teeth more easily and improving cleaning results.

[0003] The existing technology has the following requirements for the motor shaft of an electric toothbrush: lightweight shaft material: in order to reduce the overall weight of the electric toothbrush, the material of the motor shaft needs to be selected from lightweight materials, such as aluminum alloy, titanium alloy, etc., while ensuring sufficient strength and rigidity; precision machining: the manufacture of the motor shaft requires precision machining to ensure the surface smoothness and straightness of the shaft to reduce friction resistance and noise and increase the service life of the electric toothbrush; reduce the inertia of the shaft: reducing the diameter and length of the shaft can reduce the inertia of the shaft, reduce the energy consumption when the motor starts and stops, and improve the efficiency of the electric toothbrush; optimize the shaft structure: design a reasonable shaft structure to reduce the shaft's own weight and inertia, while increasing the shaft's rigidity and stability to improve the user experience of the electric toothbrush; use a high-efficiency motor: choose a low-power, high-efficiency motor to reduce the load on the motor shaft, reduce the overall weight, and improve the performance of the electric toothbrush.

[0004] In summary, the electric toothbrush motor shaft has put forward higher requirements in terms of weight reduction and fine processing. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a weight-reducing shaft for an electric toothbrush motor based on the deficiencies of the above-mentioned technologies, which has a simple structure, can be precisely processed, has a small weight and can reduce the inertia of the shaft, while ensuring the rigidity and stability of the shaft.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a weight-reducing shaft of an electric toothbrush motor, including a shaft body, wherein the shaft body includes, from left to right, a first body, a second body and a third body of matching shapes, the upper end of the first body is provided with a first shaft flat portion recessed inwardly, the lower end is provided with a second shaft flat portion recessed inwardly, a first connecting portion is provided between the first body and the second body, a motor coupling portion is provided on the right end periphery of the second body, a second connecting portion is provided between the second body and the third body, and an anti-slip portion is provided on the right periphery of the third body.

[0007] As a further elaboration of the present invention:

[0008] Preferably, the second body is cylindrical, the diameter of the first body is equal to the diameter of the second body, the diameter of the third body is smaller than the diameter of the second body, the first axial flat portion and the second axial flat portion are parallel to the second body, the length of the first axial flat portion is smaller than the length of the second axial flat portion, and the depth of the inward depression of the first axial flat portion is smaller than the depth of the inward depression of the second axial flat portion, an upward first arc-shaped connecting portion is provided between the right end of the first axial flat portion and the first body, and a downward second arc-shaped connecting portion is provided between the right end of the second axial flat portion and the first body, and the curvature of the first arc-shaped connecting portion is greater than the curvature of the second arc-shaped connecting portion.

[0009] Preferably, the middle portion of the first connecting portion is recessed inwardly in an "I" shape, and the shape of the second connecting portion matches the second body, and the diameter thereof is smaller than the diameter of the third body.

[0010] Preferably, the motor coupling part comprises four groups, which are evenly distributed in pairs on the outer periphery of the right end of the second body. The middle part of the motor coupling part is in a cube shape, and wedge-shaped barrier parts are provided at the four corners of the outer periphery of the middle part of the cube. The wedge-shaped barrier parts extend from the left end of the middle part of the motor coupling part to the end of the right end.

[0011] Preferably, the outer periphery of the anti-slip portion is provided with an anti-slip pattern.

[0012] Preferably, the length of the first body is 12.75mm-12.85mm, the length of the first axial flat portion is 6.60mm-6.80mm, the curvature of the first arc-shaped connecting portion is 140.5゜-144.5゜, the height of the first axial flat portion relative to the transverse center line of the first body is 0.985mm-1.015mm, the length of the second axial flat portion is 9.70mm-9.90mm, the curvature of the second arc-shaped connecting portion is 134.5゜-138.5゜, the height of the second axial flat portion relative to the transverse center line of the first body is 0.685mm-0.715mm, the left and right length of the first connecting portion is 1.40mm-1.60mm, the diameter of the first connecting portion is 2.28mm-2.32mm, and the diameter of the second body is 2.989mm m~3.006mm, the left and right lengths of the motor coupling part are 4.00mm~5.25mm, the distance between the two opposite wedge-shaped baffles of the motor coupling part is 6.48mm~6.52mm, the height of the middle part of the cube of the motor coupling part is 3.58mm~3.62mm, the distance between the two motor coupling parts is 3.00mm~4.00mm, the distance from the leftmost motor coupling part to the right end of the third body is 46.00mm~46.20mm, the depth of the second connecting part relative to the third body is 0.05mm~0.08mm, the length of the third body is 7.10mm~7.20mm, the diameter of the third body is 2.489mm~2.506mm, and the length of the anti-slip part is 2.90mm~3.10mm.

[0013] Preferably, the first body, the second body, the third body, the first connecting portion, the motor coupling portion, the second connecting portion and the anti-slip portion are an integrated structure.

[0014] The beneficial effects of the utility model are:

[0015] Firstly, the first body, the second body, the third body, the first connecting part, the motor coupling part, the second connecting part and the anti-slip part of the utility model are an integrated structure, the second body is cylindrical, the diameter of the first body is equal to the diameter of the second body, the diameter of the third body is smaller than the diameter of the second body, the first shaft flat portion and the second shaft flat portion are parallel to the second body, the length of the first shaft flat portion is smaller than the length of the second shaft flat portion, and the depth of the inward depression of the first shaft flat portion is smaller than the depth of the inward depression of the second shaft flat portion, an upward first arc-shaped connecting part is provided between the right end of the first shaft flat portion and the first body, a downward second arc-shaped connecting part is provided between the right end of the second shaft flat portion and the first body, the middle part of the first connecting part is recessed inwardly in an "I" shape, and the shape of the second connecting part matches the second body, and the structure is simple, which facilitates precise processing while ensuring the rigidity and stability of the overall rotating shaft.

[0016] Secondly, the motor coupling part of the utility model includes four groups, which are evenly distributed on the right end periphery of the second body at an interval of two. The middle part of the motor coupling part is a cube, and the four corners of the outer periphery of the middle part of the cube are provided with wedge-shaped baffles. The wedge-shaped baffles extend from the left end of the middle part of the motor coupling part to the right end. The four groups of motor coupling parts are spaced two by two, which reduces the overall weight of the shaft body and generally meets the higher requirements of the prior art electric toothbrush motor shaft in terms of weight reduction and fine processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of part A.

[0019] Figure 3 It is a left view of the overall structure of the utility model.

[0020] In the figure: 1. first body; 2. second body; 3. third body; 4. first shaft flat portion; 5. second shaft flat portion; 6. first connecting portion; 7. motor coupling portion; 8. second connecting portion; 9. anti-slip pattern; 10. first arc-shaped connecting portion; 11. second arc-shaped connecting portion; 12. wedge-shaped barrier portion. DETAILED DESCRIPTION

[0021] The structural principle and working principle of the utility model are further described in detail below with reference to the accompanying drawings.

[0022] like Figure 1 to Figure 3 As shown, the utility model is a weight-reducing shaft for an electric toothbrush motor, comprising a shaft body, wherein the shaft body comprises, from left to right, a first body 1, a second body 2 and a third body 3 of matching shapes, the upper end of the first body 1 is provided with a first shaft flat portion 4 recessed inwardly, the lower end is provided with a second shaft flat portion 5 recessed inwardly, a first connecting portion 6 is provided between the first body 1 and the second body 2, a motor coupling portion 7 is provided at the right end periphery of the second body 2, a second connecting portion 8 is provided between the second body 2 and the third body 3, and an anti-slip portion is provided at the right periphery of the third body 3.

[0023] like Figure 1 to Figure 3 As shown, the second body 2 is cylindrical, the diameter of the first body 1 is equal to that of the second body 2, the diameter of the third body 3 is smaller than that of the second body 2, the first axial flat portion 4 and the second axial flat portion 5 are parallel to the second body 2, the length of the first axial flat portion 4 is smaller than that of the second axial flat portion 5, and the depth of the inward depression of the first axial flat portion 4 is smaller than the depth of the inward depression of the second axial flat portion 5, an upward first arc-shaped connecting portion 10 is provided between the right end of the first axial flat portion 4 and the first body 1, and a downward second arc-shaped connecting portion 11 is provided between the right end of the second axial flat portion 5 and the first body 1, and the curvature of the first arc-shaped connecting portion 10 is greater than that of the second arc-shaped connecting portion 11.

[0024] like Figure 1-2 As shown, the middle portion of the first connection portion 6 is recessed inwardly to form an I-shape, and the shape of the second connection portion 8 matches the second body 2 , and the diameter thereof is smaller than the diameter of the third body 3 .

[0025] like Figure 1 , Figure 3 As shown, the motor coupling part 7 includes four groups, which are evenly distributed in pairs on the right end periphery of the second body 2. The middle part of the motor coupling part 7 is a cube, and the four corners of the middle periphery of the cube are provided with wedge-shaped partitions 12. The wedge-shaped partitions 12 extend from the left end of the middle part of the motor coupling part 7 to the right end.

[0026] like Figure 1 As shown, an anti-slip pattern 9 is provided on the periphery of the anti-slip portion.

[0027] Further, the length of the first body 1 is 12.75mm-12.85mm, the length of the first axial flat portion 4 is 6.60mm-6.80mm, the curvature of the first arc-shaped connecting portion 10 is 140.5゜-144.5゜, the height of the first axial flat portion 4 relative to the transverse center line of the first body 1 is 0.985mm-1.015mm, the length of the second axial flat portion 5 is 9.70mm-9.90mm, the curvature of the second arc-shaped connecting portion 11 is 134.5゜-138.5゜, the height of the second axial flat portion 5 relative to the transverse center line of the first body 1 is 0.685mm-0.715mm, the left and right length of the first connecting portion 6 is 1.40mm-1.60mm, the diameter of the first connecting portion 6 is 2.28mm-2.32mm, and the diameter of the second body 2 is 2.98 9mm~3.006mm, the left and right lengths of the motor coupling part 7 are 4.00mm~5.25mm, the distance between the two opposite wedge-shaped baffles 12 of the motor coupling part 7 is 6.48mm~6.52mm, the height of the middle part of the cube of the motor coupling part 7 is 3.58mm~3.62mm, the distance between the two motor coupling parts 7 is 3.00mm~4.00mm, the distance from the leftmost motor coupling part 7 to the right end of the third body 3 is 46.00mm~46.20mm, the depth of the second connecting part 8 relative to the third body 3 is 0.05mm~0.08mm, the length of the third body 3 is 7.10mm~7.20mm, the diameter of the third body 3 is 2.489mm~2.506mm, and the length of the anti-slip part is 2.90mm~3.10mm. Preferably, in this embodiment, the length of the first body 1 is 12.80 mm, the length of the first axial flat portion 4 is 6.70 mm, the curvature of the first arc-shaped connecting portion 10 is 142.5°, the height of the first axial flat portion 4 relative to the transverse center line of the first body 1 is 1.000 mm, the length of the second axial flat portion 5 is 9.80 mm, the curvature of the second arc-shaped connecting portion 11 is 136.5°, the height of the second axial flat portion 5 relative to the transverse center line of the first body 1 is 0.700 mm, the left and right length of the first connecting portion 6 is 1.50 mm, the diameter of the first connecting portion 6 is 2.30 mm, and the diameter of the second body 2 is 1.000 mm. The diameter is 3.000mm, the left and right lengths of the motor combining part 7 are 4.65mm, the distance between the two opposite wedge-shaped blocking parts 12 of the motor combining part 7 is 6.50mm, the height of the middle part of the cube of the motor combining part 7 is 3.60mm, the distance between the two motor combining parts 7 is 3.50mm, the distance from the leftmost motor combining part 7 to the right end of the third body 3 is 46.10mm, the depth of the second connecting part 8 relative to the third body 3 is 0.06mm, the length of the third body 3 is 7.15mm, the diameter of the third body 3 is 2.498mm, and the length of the anti-slip part is 3.00mm.

[0028] Furthermore, the first body 1, the second body 2, the third body 3, the first connecting portion 6, the motor combining portion 7, the second connecting portion 8 and the anti-slip portion are an integrated structure.

[0029] In the description of the present application, it should be understood that the terms "upper end", "lower end", "up", "down", "left", "right", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc., are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0030] The above is only a preferred embodiment of the present invention. Any slight modification, equivalent changes and modifications made to the above embodiments according to the technical solution of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A weight-reducing rotating shaft of an electric toothbrush motor, characterized in that: The utility model comprises a rotating shaft body, which comprises a first body, a second body and a third body of matching shapes from left to right, the upper end of the first body is provided with a first shaft flat portion recessed inwardly, the lower end is provided with a second shaft flat portion recessed inwardly, a first connecting portion is provided between the first body and the second body, a motor coupling portion is provided at the right end periphery of the second body, a second connecting portion is provided between the second body and the third body, and an anti-slip portion is provided at the right periphery of the third body.

2. The weight-reducing shaft of the electric toothbrush motor according to claim 1, characterized in that: The second body is cylindrical, the diameter of the first body is equal to the diameter of the second body, the diameter of the third body is smaller than the diameter of the second body, the first axial flat portion and the second axial flat portion are parallel to the second body, the length of the first axial flat portion is smaller than the length of the second axial flat portion, and the depth of the inward depression of the first axial flat portion is smaller than the depth of the inward depression of the second axial flat portion, an upward first arc-shaped connecting portion is provided between the right end of the first axial flat portion and the first body, and a downward second arc-shaped connecting portion is provided between the right end of the second axial flat portion and the first body, and the curvature of the first arc-shaped connecting portion is greater than the curvature of the second arc-shaped connecting portion.

3. The weight-reducing shaft of the electric toothbrush motor according to claim 2, characterized in that: The middle portion of the first connecting portion is recessed inwardly in an "I" shape, and the shape of the second connecting portion matches the second body, and the diameter thereof is smaller than the diameter of the third body.

4. The weight-reducing shaft of the electric toothbrush motor according to claim 3, characterized in that: The motor combination part includes four groups, which are evenly distributed on the right end periphery of the second body with two groups spaced apart. The middle part of the motor combination part is in a cube shape, and wedge-shaped baffles are provided at the four corners of the middle periphery of the cube shape. The wedge-shaped baffles extend from the left end of the middle part of the motor combination part to the right end.

5. The weight-reducing shaft of the electric toothbrush motor according to claim 4, characterized in that: The outer periphery of the anti-slip portion is provided with an anti-slip pattern.

6. The weight-reducing shaft of the electric toothbrush motor according to claim 5, characterized in that: The length of the first body is 12.75mm-12.85mm, the length of the first axial flat portion is 6.60mm-6.80mm, the curvature of the first arc-shaped connecting portion is 140.5゜-144.5゜, the height of the first axial flat portion relative to the transverse center line of the first body is 0.985mm-1.015mm, the length of the second axial flat portion is 9.70mm-9.90mm, the curvature of the second arc-shaped connecting portion is 134.5゜-138.5゜, the height of the second axial flat portion relative to the transverse center line of the first body is 0.685mm-0.715mm, the left and right length of the first connecting portion is 1.40mm-1.60mm, the diameter of the first connecting portion is 2.28mm-2.32mm, and the diameter of the second body is 2.989mm- 3.006mm, the left and right lengths of the motor coupling are 4.00mm~5.25mm, the distance between the two opposite wedge-shaped baffles of the motor coupling is 6.48mm~6.52mm, the height of the middle part of the cube of the motor coupling is 3.58mm~3.62mm, the distance between the two motor couplings is 3.00mm~4.00mm, the distance from the leftmost motor coupling to the right end of the third body is 46.00mm~46.20mm, the depth of the second connecting portion relative to the third body is 0.05mm~0.08mm, the length of the third body is 7.10mm~7.20mm, the diameter of the third body is 2.489mm~2.506mm, and the length of the anti-slip portion is 2.90mm~3.10mm.

7. The weight-reducing shaft of the electric toothbrush motor according to any one of claims 1 to 6, characterized in that: The first body, the second body, the third body, the first connecting portion, the motor combining portion, the second connecting portion and the anti-slip portion are an integrated structure.

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