Actuator and electric toothbrush

Abstract

The utility model provides an actuator and an electric toothbrush. The actuator includes: a housing; the rotor member includes a power take-off shaft extending longitudinally through the housing along the main axis, and a magnet assembly attached to the power take-off shaft; two bearing members mechanically couple the power take-off shaft to the housing; the anti-abrasion component is arranged on the side, facing the magnet assembly, of at least one bearing component in the two bearing components; the elastic component is located on the periphery of the power output shaft, one end of the elastic component abuts against the anti-abrasion component, and the other end of the elastic component abuts against the magnet assembly; the stator component is fixed to the shell and is separated from the magnet assembly through a space gap in the radial direction of the main axis; during operation of the actuator, there is a magnetic interaction between the stator member and the spaced apart magnet assembly to provide vibratory movement of the power take-off shaft at a selected frequency and angle. According to the technical scheme, the problem that an actuator in the prior art is prone to being damaged due to bearing abrasion is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric toothbrushes, in particular to an actuator and an electric toothbrush. Background Art

[0002] An electric toothbrush mainly consists of a shell, an actuator and a brush head. The actuator can drive the brush head to produce high-frequency vibrations, instantly breaking down the toothpaste into fine foam and deeply cleaning the gaps between teeth.

[0003] In the prior art, the actuator is mainly composed of three parts: a stator component, a rotor component and a housing. The rotor component is coupled to the housing through a bearing. When the actuator vibrates, the rotating shaft of the rotor component is prone to axial movement. A spring can be used to prevent the rotating shaft from axial movement. However, the spring is easily affected by the vibration of the actuator and vibrates slightly, which will wear the dust cover of the bearing in a small range. After working for a long time, the dust cover will be worn out, causing the bearing ball to get stuck, which will cause damage to the actuator. Utility Model Content

[0004] The main purpose of the utility model is to provide an actuator and an electric toothbrush to solve the problem in the prior art that the actuator is easily damaged due to bearing wear.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an actuator, comprising: a shell; a rotor component, comprising a power output shaft extending longitudinally along the main axis and passing through the shell, and a magnet assembly attached to the power output shaft; two bearing components, along the longitudinal extension direction of the main axis, the two bearing components are respectively located on both sides of the magnet assembly, and each bearing component is located between the power output shaft and the shell to mechanically couple the power output shaft to the shell; an anti-wear component, located at the outer periphery of the power output shaft, and at least one of the two bearing components is provided with an anti-wear component on the side facing the magnet assembly; an elastic component, located at the outer periphery of the power output shaft, one end of the elastic component abuts against the anti-wear component, and the other end of the elastic component abuts against the magnet assembly; a stator component fixed to the shell, separated from the magnet assembly by a spatial gap along the radial direction of the main axis; during the operation of the actuator, there is a magnetic interaction between the stator component and the separated magnet assembly to provide the power output shaft with a vibrating movement at a selected frequency and angle.

[0006] Further, along the longitudinal extension direction of the main axis, the thickness of the wear-resistant component is greater than or equal to 0.2 mm and less than or equal to 1 mm.

[0007] Further, the diameter of the circumscribed circle of the anti-wear component in the radial direction of the main axis is A, and the outer diameter of the elastic component is B, wherein 1.1B≤A≤1.2B.

[0008] Further, the projection of the anti-wear component on the first plane is a polygon or a circle, and the first plane is arranged perpendicular to the main axis.

[0009] Further, the anti-wear component is a plate-like structure; or, the anti-wear component includes an anti-wear plate and a sleeve connected to the anti-wear plate, the sleeve is located at the periphery of a portion of the elastic component, and the elastic component abuts against the anti-wear plate.

[0010] Furthermore, the wear-resistant component is made of non-metallic material, metal material or alloy material.

[0011] Furthermore, the actuator also includes a first mounting groove, a mounting cavity and a second mounting groove which are sequentially arranged on the shell along the longitudinal extension direction of the main axis, the magnet assembly is located in the mounting cavity, and the two bearing components are respectively installed in the first mounting groove and the second mounting groove.

[0012] Furthermore, an insulating layer is provided on a side of the stator component facing away from the power output shaft.

[0013] Furthermore, the actuator also includes a magnetic bridge installed on the shell, and there are two stator components. The two stator components are arranged at intervals around the main axis. Each stator component includes an iron core and a winding wound around the iron core. The two iron cores are connected to each other through the magnetic bridge.

[0014] According to another aspect of the utility model, the utility model provides an electric toothbrush, comprising a housing, the above-mentioned actuator and a brush head, wherein the power output shaft of the actuator is drivingly connected to the brush head.

[0015] By applying the technical solution of the utility model, on the one hand, by providing an elastic component, and the two ends of the elastic component are respectively abutted against the bearing component and the magnet assembly, relative movement between the bearing component and the magnet assembly can be avoided, thereby reducing the probability of axial displacement of the power output shaft connected to the bearing component relative to the magnet assembly, and / or reducing the probability of axial displacement of the power output shaft connected to the magnet assembly relative to the bearing component, thereby avoiding axial movement of the power output shaft; on the other hand, by providing an anti-wear component, the elastic component can be prevented from wearing the flat plate part of the dust cover of the bearing component, thereby avoiding the problem of the elastic component wearing out the dust cover of the bearing component after long-term work, thereby avoiding failure of the bearing component caused by bearing ball jamming, and thereby avoiding damage to the actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 A schematic structural diagram of an embodiment of the actuator of the utility model is shown;

[0018] Figure 2 shows a Figure 1 schematic exploded view of an actuator;

[0019] Figure 3 shows a Figure 1 schematic exploded view of another actuator;

[0020] Figure 4 shows a Figure 1 cross-sectional view of an actuator.

[0021] Wherein, the above-mentioned drawings include the following reference numerals:

[0022] 10. Housing; 11. First mounting groove; 12. Mounting cavity; 13. Second mounting groove; 21. Power output shaft; 22. Magnet assembly; 23. Stator member; 231. Winding; 232. Iron core; 25. Magnetic conduction bridge; 26. Insulating layer; 51. Blocking member; 52. Bearing member; 53. Anti-wear member; 54. Elastic member; L. Main axis. Detailed implementation manners

[0023] It should be noted that, without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The following will describe the present invention in detail with reference to the drawings and in conjunction with the embodiments.

[0024] It should be noted that the actuator in the embodiments of the present invention is mainly used for an electric toothbrush.

[0025] Such as Figures 1 to 4As shown in the figure, an embodiment of the present utility model provides an actuator. The actuator includes a housing 10, a rotor member, two bearing members 52, an anti-wear member 53, an elastic member 54, and a stator member 23 fixed to the housing 10. Among them, the rotor member includes a power output shaft 21 longitudinally extending through the housing 10 along the main axis L, and a magnet assembly 22 attached to the power output shaft 21; the two bearing members 52 extend longitudinally along the main axis L, and the two bearing members 52 are respectively located on both sides of the magnet assembly 22, and each bearing member 52 is located between the power output shaft 21 and the housing 10 to mechanically couple the power output shaft 21 to the housing 10; the anti-wear member 53 is located on the outer periphery of the power output shaft 21, and an anti-wear member 53 is provided on one side of at least one of the two bearing members 52 facing the magnet assembly 22; the elastic member 54 is located on the outer periphery of the power output shaft 21, one end of the elastic member 54 abuts against the anti-wear member 53, and the other end of the elastic member 54 abuts against the magnet assembly 22; the stator member 23 is separated from the magnet assembly 22 by a spatial gap along the radial direction of the main axis L; during the operation of the actuator, there is a magnetic interaction between the stator member 23 and the separated magnet assembly 22 to provide a vibrating motion of the power output shaft 21 at a selected frequency and angle.

[0026] In the above technical solution, on the one hand, by providing the elastic member 54, and the two ends of the elastic member 54 respectively abut against the bearing member 52 and the magnet assembly 22, relative movement between the bearing member 52 and the magnet assembly 22 can be avoided, thereby reducing the probability of axial displacement of the power output shaft 21 connected to the bearing member 52 relative to the magnet assembly 22, and / or reducing the probability of axial displacement of the power output shaft 21 connected to the magnet assembly 22 relative to the bearing member 52, and further avoiding axial runout of the power output shaft 21; on the other hand, by providing the anti-wear member 53, the elastic member 54 can be prevented from wearing the flat part of the dust cover of the bearing member 52, thereby avoiding the problem that the elastic member 54 wears through the dust cover of the bearing member 52 after long-term operation, so as to avoid the failure of the bearing member 52 caused by bearing ball jamming, and further avoid damage to the actuator.

[0027] Preferably, in the embodiment of the present utility model, the anti-wear member 53 is made of a non-metallic material, which can reduce frictional squeaking noise; the elastic member 54 is preferably a spring.

[0028] Specifically, in the embodiment of the present utility model, the anti-wear member 53 is in clearance fit with the power output shaft 21 and can move freely along the main axis L.

[0029] Specifically, in the embodiments of the present utility model, along the longitudinal extension direction of the main axis L, the thickness of the anti-wear member 53 is greater than or equal to 0.2 mm and less than or equal to 1 mm. In this way, not only can the problem of difficult stamping process caused by too thick a thickness of the anti-wear member 53 be avoided, but also the problem of difficult hardness guarantee caused by too thin a thickness of the anti-wear member 53 can be avoided.

[0030] Specifically, in the embodiments of the present utility model, the diameter of the circumscribed circle of the anti-wear member 53 in the radial direction of the main axis L is A, and the outer diameter of the elastic member 54 is B, where 1.1B ≤ A ≤ 1.2B.

[0031] Through the above settings, the diameter of the anti-wear member 53 can be 10%-20% larger than the outer diameter of the elastic member 54. In this way, on the one hand, the problem of contact wear between the elastic member 54 and the bearing member 52 caused by too small an anti-wear member 53 can be avoided; on the other hand, the problem of material waste caused by too large an anti-wear member 53 can be avoided.

[0032] Specifically, in the embodiments of the present utility model, the projection of the anti-wear member 53 on the first plane is a polygon or a circle, and the first plane is perpendicular to the main axis L.

[0033] Preferably, in the embodiments of the present utility model, the anti-wear member 53 is of a plate-like structure. In this way, it is convenient for processing.

[0034] In one embodiment, the anti-wear member 53 includes an anti-wear plate and a sleeve connected to the anti-wear plate. The sleeve is located on the outer periphery of a part of the elastic member 54, and the elastic member 54 abuts against the anti-wear plate. In this way, not only can the bearing member 52 be protected, but also the elastic member 54 can be radially limited and a part of the elastic member 54 can be covered by the sleeve, so that the elastic member 54 can perform telescopic deformation along the longitudinal extension direction of the main axis L.

[0035] Specifically, in the embodiments of the present utility model, the anti-wear member 53 is made of a metal material or an alloy material. In this way, the anti-wear member 53 can be guaranteed to have a service life of 2 to 3 years. Among them, the material of the anti-wear member 53 is preferably steel.

[0036] In one embodiment, the anti-wear member 53 can be made of a non-metallic material.

[0037] It should be noted that in the embodiments of the present utility model, when the anti-wear member 53 is sleeved on the power output shaft 21 during assembly, the elastic member 54 abuts against the anti-wear member 53, and fixation can be achieved without dust prevention and rust prevention.

[0038] Preferably, in the embodiments of the present utility model, anti-wear members 53 are provided on one side of both bearing members 52 facing the magnet assembly 22.

[0039] In one embodiment, the anti-wear component 53 may be provided only on the side of any one of the two bearing components 52 facing the magnet assembly 22 .

[0040] like Figure 1 and Figure 2 As shown, in the embodiment of the utility model, the actuator further comprises a first mounting groove 11, a mounting cavity 12 and a second mounting groove 13 sequentially arranged on the housing 10 along the longitudinal extension direction of the main axis L, the magnet assembly 22 is located in the mounting cavity 12, and the two bearing components 52 are respectively installed in the first mounting groove 11 and the second mounting groove 13. In this way, the two bearing components 52 can be installed.

[0041] like Figure 1 and Figure 2 As shown, in the embodiment of the utility model, the actuator further includes a magnetic bridge 25 installed on the housing 10, and there are two stator components 23, which are arranged at intervals around the main axis L. Each stator component 23 includes an iron core 232 and a winding 231 wound around the iron core 232, and the two iron cores 232 are connected to each other through the magnetic bridge 25. In this way, magnetic leakage of the iron core 232 can be effectively prevented to improve the efficiency of the actuator.

[0042] like Figure 2 As shown, in the embodiment of the utility model, an insulating layer 26 is provided on the side of the stator component 23 away from the power output shaft 21. In this way, the magnetic bridge 25 can be prevented from scratching the winding 231 during assembly, thereby avoiding short circuit failure of the actuator.

[0043] Preferably, in an embodiment of the present utility model, the insulating layer 26 is an insulating sheet made of insulating material, and the insulating sheet is attached to the winding 231 or the insulating sheet is directly pressed onto the winding 231 by a jig.

[0044] It should be noted that in the embodiment of the utility model, two iron cores 232 are integrally embedded on both sides of the housing 10, windings 231 are wound on both iron cores 232, the rotor component is installed in the housing 10, the two iron cores 232 are coaxially adapted to the rotor component, the magnetic bridge 25 is installed on the housing 10, and the two iron cores 232 are magnetically connected to each other through the magnetic bridge 25. Among them, the housing 10 has two side surfaces and is located at the winding 231. One end of the two iron cores 232 is exposed at the receiving groove, the magnetic bridge 25 is fixed in the receiving groove, and the two ends of the magnetic bridge 25 are in contact with the two iron cores 232.

[0045] It should be noted that during the assembly of the actuator, the magnetic bridge 25 needs to be inserted into both sides of the two stator members 23 along the longitudinal extension direction of the main axis. In this way, it is easy to cause the problem that the magnetic bridge 25 scratches the winding 231 of the stator member 23, which will lead to an increase in the defective rate of the actuator and a poor production consistency of the actuator. However, the actuator of this embodiment can avoid the problem that the magnetic bridge 25 scratches the winding 231 during installation by providing the insulating layer 26, thereby solving the problems of low production consistency and high defective rate, and better meeting the customer groups with different needs.

[0046] As Figure 2 shown, in the embodiment of the present invention, the rotor member further includes a blocking member 51, and at least one end face of the magnet assembly 22 abuts against the blocking member 51 along the longitudinal extension direction of the main axis L.

[0047] In the above technical solution, by having at least one end face of the magnet assembly 22 abut against the blocking member 51, the plurality of magnets of the magnet assembly 22 can be limited in the longitudinal extension direction of the main axis L, so that the plurality of magnets of the magnet assembly 22 can be more stably attached to the power output shaft 21. In this way, under the high-speed rotation of the rotor member and the high-frequency vibration of the actuator, the probability that each magnet of the magnet assembly 22 moves along the longitudinal extension direction of the main axis L can be reduced, thereby avoiding the problem that each magnet of the magnet assembly 22 falls off from the power output shaft 21 along the longitudinal extension direction of the main axis L.

[0048] Specifically, in the embodiment of the present invention, the magnet assembly 22 can be embedded in the power output shaft 21 or installed on the outer periphery of the power output shaft 21.

[0049] As Figure 2 shown, in the embodiment of the present invention, along the longitudinal extension direction of the main axis L, both end faces of the magnet assembly 22 abut against the blocking member 51.

[0050] Through the above setting, the two ends of the magnet assembly 22 can be limited in the longitudinal extension direction of the main axis L. In this way, under the high-speed rotation of the rotor member and the high-frequency vibration of the actuator, it is possible to avoid the movement of each magnet of the magnet assembly 22 along the longitudinal extension direction of the main axis L, thereby avoiding the problem that each magnet of the magnet assembly 22 falls off from the power output shaft 21 along the longitudinal extension direction of the main axis L.

[0051] Specifically, in the embodiment of the present invention, there can be two blocking members 51, and the two blocking members 51 respectively abut against the two end faces of the magnet assembly 22. The blocking member 51 can also be one, and the blocking member 51 is of a C-shaped structure or a U-shaped structure, and the two ends of the structure respectively abut against the two end faces of the magnet assembly 22.

[0052] In one embodiment, it is also possible that only one end face of the magnet assembly 22 abuts against the blocking member 51.

[0053] Specifically, in the embodiment of the present invention, the ratio of the contact area between the blocking member 51 and the magnet assembly 22 to the area of the end face of the magnet assembly 22 is in the range of 50% to 100%. In this way, on the one hand, it is possible to prevent the blocking member 51 from protruding radially outwards of the magnet assembly 22 along the main axis L, thereby avoiding interference of the blocking member 51 with the assembly of components outside the magnet assembly 22; on the other hand, it is possible to avoid the problem of poor limiting effect caused by a small contact area between the blocking member 51 and the magnet assembly 22.

[0054] It should be noted that in the embodiment of the present invention, whether one end face of the magnet assembly 22 abuts against the blocking member 51 or both end faces of the magnet assembly 22 abut against the blocking member 51, the ratio of the contact area between each end face of the magnet assembly 22 and the blocking member 51 to the area of this end face is in the range of 50% to 100%.

[0055] As Figure 2 shown, in the embodiment of the present invention, the blocking member 51 is bonded to at least one end face of the magnet assembly 22. In this way, the blocking member 51 can be fixed to the end of the magnet assembly 22 to enhance the adhesive force of the end face of the magnet assembly 22 and prevent the magnets of the magnet assembly 22 from falling off.

[0056] Preferably, in the embodiment of the present invention, the blocking member 51 is connected to the end face of the magnet assembly 22 by means of gluing.

[0057] In one embodiment, it is also possible to abut the blocking member 51 against the magnet assembly 22 by means of an elastic member 54.

[0058] As Figure 2 and Figure 3 shown, in the embodiment of the present invention, along the radial direction of the main axis L, the maximum outer diameter of the blocking member 51 is smaller than the maximum outer diameter of the magnet assembly 22.

[0059] Through the above arrangement, it is possible to prevent the blocking member 51 from protruding radially outwards of the magnet assembly 22 along the main axis L, thereby avoiding interference of the blocking member 51 with the assembly of components outside the magnet assembly 22.

[0060] It should be noted that in the embodiment of the present invention, the maximum outer diameter of the blocking member 51 refers to the diameter of the circumscribed circle of the blocking member 51 in the radial direction of the main axis L. Similarly, the maximum outer diameter of the magnet assembly 22 refers to the diameter of the circumscribed circle of the magnet assembly 22 in the radial direction of the main axis L. Among them, the blocking member 51 is preferably an annular sheet structure.

[0061] In one embodiment, the projection of the blocking member 51 on the second plane is located within the projection area of ​​the magnet assembly 22 on the second plane, and the second plane is disposed perpendicular to the main axis L.

[0062] Specifically, in the embodiment of the present invention, the matching manner between the blocking member 51 and the power output shaft 21 includes but is not limited to interference fit or clearance fit.

[0063] Specifically, in the embodiment of the present invention, the shape of the blocking member 51 is not limited, and the material of the blocking member 51 includes but is not limited to plastic or steel, wherein the influence of the metal material on the magnetic field of the magnet assembly 22 is negligible.

[0064] Specifically, in the embodiment of the present invention, the contact surface between the blocking member 51 and the magnet assembly 22 is not limited to a plane, and can be a curved surface, a wavy surface, etc., as long as the end surface of the blocking member 51 fits with the end surface of the magnet assembly 22.

[0065] The embodiment of the utility model provides an electric toothbrush, which comprises a housing, the actuator and a brush head, wherein a power output shaft 21 of the actuator is drivingly connected to the brush head.

[0066] From the above description, it can be seen that the above-mentioned embodiments of the utility model achieve the following technical effects: on the one hand, by providing an elastic component, and the two ends of the elastic component are respectively abutted against the bearing component and the magnet assembly, relative movement between the bearing component and the magnet assembly can be avoided, thereby reducing the probability of axial displacement of the power output shaft connected to the bearing component relative to the magnet assembly, and / or reducing the probability of axial displacement of the power output shaft connected to the magnet assembly relative to the bearing component, thereby avoiding axial movement of the power output shaft; on the other hand, by providing an anti-wear component, the elastic component can be prevented from wearing the flat part of the dust cover of the bearing component, thereby avoiding the problem of the elastic component wearing the dust cover of the bearing component after long-term work, so as to avoid failure of the bearing component caused by bearing ball jamming, and thereby avoiding damage to the actuator.

[0067] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An actuator, characterized in that: include: Housing (10); a rotor member comprising a power take-off shaft (21) extending longitudinally along a main axis (L) through the housing (10), and a magnet assembly (22) attached to the power take-off shaft (21); two bearing components (52), respectively located on both sides of the magnet assembly (22) along the longitudinal extension direction of the main axis (L), and each bearing component (52) is located between the power output shaft (21) and the housing (10) to mechanically couple the power output shaft (21) to the housing (10); an anti-wear component (53) located on the outer periphery of the power output shaft (21), and the anti-wear component (53) is provided on a side of at least one of the two bearing components (52) facing the magnet assembly (22); an elastic component (54) located on the outer periphery of the power output shaft (21), one end of the elastic component (54) abutting against the anti-wear component (53), and the other end of the elastic component (54) abutting against the magnet assembly (22); a stator component (23) fixed to the housing (10) and separated from the magnet assembly (22) by a space gap in the radial direction of the main axis (L); During operation of the actuator, there is magnetic interaction between the stator member (23) and the spaced apart magnet assembly (22) to provide vibratory movement of the power take-off shaft (21) at a selected frequency and angle.

2. The actuator according to claim 1, characterized in that Along the longitudinal extension direction of the main axis (L), the thickness of the wear-resistant component (53) is greater than or equal to 0.2 mm and less than or equal to 1 mm.

3. The actuator according to claim 1, characterized in that The diameter of the circumscribed circle of the anti-wear component (53) in the radial direction of the main axis (L) is A, and the outer diameter of the elastic component (54) is B, wherein 1.1B≤A≤1.2B.

4. The actuator according to claim 1, characterized in that The projection of the anti-wear component (53) on the first plane is a polygon or a circle, and the first plane is arranged perpendicular to the main axis (L).

5. The actuator according to claim 1, characterized in that: The anti-wear component (53) is a plate-like structure; or, The anti-wear component (53) comprises an anti-wear plate and a sleeve connected to the anti-wear plate, wherein the sleeve is located on a portion of the outer periphery of the elastic component (54), and the elastic component (54) abuts against the anti-wear plate.

6. The actuator according to claim 1, characterized in that The anti-wear component (53) is made of non-metallic material, metal material or alloy material.

7. The actuator according to any one of claims 1 to 6, characterized in that: The actuator further comprises a first mounting groove (11), a mounting cavity (12) and a second mounting groove (13) which are sequentially arranged on the housing (10) along the longitudinal extension direction of the main axis (L); the magnet assembly (22) is located in the mounting cavity (12); and the two bearing components (52) are respectively mounted in the first mounting groove (11) and the second mounting groove (13).

8. The actuator according to any one of claims 1 to 6, characterized in that: An insulating layer (26) is provided on the side of the stator component (23) facing away from the power output shaft (21).

9. The actuator according to any one of claims 1 to 6, characterized in that: The actuator further comprises a magnetic bridge (25) mounted on the housing (10); the stator components (23) are two, the two stator components (23) are spaced apart around the main axis (L); each stator component (23) comprises an iron core (232) and a winding (231) wound around the iron core (232); the two iron cores (232) are mutually conductive via the magnetic bridge (25).

10. An electric toothbrush, characterized in that: It comprises a housing, an actuator according to any one of claims 1 to 9, and a brush head, wherein the power output shaft (21) of the actuator is drivingly connected to the brush head.

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