Actuator

Abstract

The utility model provides an actuator. The actuator includes: a housing; a rotor member including a power take-off shaft extending longitudinally through the housing along a main axis, and a magnet assembly and a blocking member attached to the power take-off shaft, at least one end face of the magnet assembly abutting against the blocking member in a longitudinal extension direction of the main axis; 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 of the utility model, the problem that the magnet of the actuator in the prior art is easy to move along the axial direction of the rotating shaft so that the magnet is easy to fall off from the rotating shaft is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric toothbrushes, in particular to an actuator. 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 generally includes a rotating shaft and a magnet located on the outer periphery of the rotating shaft. The magnet is often mounted on the rotating shaft by bonding. However, under the high-speed rotation of the rotor component and the high-frequency vibration of the actuator, the magnet is easy to move along the axial direction of the rotating shaft, resulting in the problem that the magnet is easy to fall off the rotating shaft. Utility Model Content

[0004] The main purpose of the utility model is to provide an actuator to solve the problem that the magnet of the actuator in the prior art is easy to move along the axial direction of the rotating shaft, resulting in the magnet being easy to fall off the rotating shaft.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an actuator, comprising: a shell; a rotor component, including a power output shaft extending longitudinally along the main axis and passing through the shell, and a magnet assembly and a blocking component attached to the power output shaft, at least one end face of the magnet assembly abuts against the blocking component along the longitudinal extension direction of the main axis; 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 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, both end surfaces of the magnet assembly abut against the blocking member.

[0007] Further, the ratio of the contact area between the blocking member and the magnet assembly to the area of ​​the end surface of the magnet assembly is in the range of 50% to 100%.

[0008] Further, the blocking member is bonded to at least one end surface of the magnet assembly.

[0009] Further, along the radial direction of the main axis, the maximum outer diameter of the blocking member is smaller than the maximum outer diameter of the magnet assembly.

[0010] Further, the actuator further includes mounting grooves provided at both ends of the housing along the longitudinal extension direction of the main axis, and: two bearing members respectively mounted in the two mounting grooves to mechanically couple the power output shaft to the housing; an anti-wear member located on the outer periphery of the power output shaft, and an anti-wear member is provided on at least one side of the two bearing members facing the magnet assembly; an elastic member located on the outer periphery of the power output shaft, one end of the elastic member abuts against the anti-wear member, and the other end of the elastic member abuts against the blocking member or the end face of the magnet assembly.

[0011] Further, along the longitudinal extension direction of the main axis, the thickness of the anti-wear member is greater than or equal to 0.2 mm and less than or equal to 1 mm.

[0012] Further, the diameter of the circumscribed circle of the anti-wear member in the radial direction of the main axis is A, and the outer diameter of the elastic member is B, where 1.1B ≤ A ≤ 1.2B.

[0013] Further, the projection of the anti-wear member on the first plane is a polygon or a circle, and the first plane is perpendicular to the main axis.

[0014] Further, the anti-wear member is a plate-like structure; or, the anti-wear member 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, and the elastic member abuts against the anti-wear plate.

[0015] Further, the anti-wear member is made of a non-metallic material, a metallic material or an alloy material.

[0016] Further, an insulating layer is provided on the side of the stator member facing away from the power output shaft.

[0017] Further, the actuator further includes a magnetic conduction bridge mounted on the housing, there are two stator members, the two stator members are arranged at intervals around the main axis, each stator member includes an iron core and a winding wound around the iron core, and the two iron cores are electrically connected to each other through the magnetic conduction bridge.

[0018] Applying the technical solution of the present utility model, by having a blocking member abutted against at least one end face of the magnet assembly, the multiple magnets of the magnet assembly can be limited in the longitudinal extension direction of the main axis L, so that the multiple magnets of the magnet assembly can be more stably attached to the power output shaft. 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 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 falls off from the power output shaft along the longitudinal extension direction of the main axis L. Description of the Drawings

[0019] The accompanying drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0020] Figure 1 A schematic structural view of an embodiment of the actuator of the present utility model is shown;

[0021] Figure 2 Shows Figure 1 An exploded structural view of the actuator of;

[0022] Figure 3 Shows Figure 1 Another exploded structural view of the actuator of;

[0023] Figure 4 Shows Figure 1 A cross-sectional view of the actuator of.

[0024] Among them, the above-mentioned drawings include the following reference numerals:

[0025] 10, housing; 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 embodiments

[0026] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0027] It should be noted that the actuator of the embodiment of the present utility model is mainly used for an electric toothbrush.

[0028] As Figures 1 to 4 shown, an embodiment of the present utility model provides an actuator. The actuator includes: a housing 10, a rotor member, and a stator member 23 fixed to the housing 10. 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 and a blocking member 51 attached to the power output shaft 21. Along the longitudinal extension direction of the main axis L, at least one end face of the magnet assembly 22 abuts against the blocking member 51; 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 the power output shaft 21 with a vibratory motion at a selected frequency and angle.

[0029] In the above technical solution, by providing a blocking member 51 abutted against at least one end face of the magnet assembly 22, 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 of each magnet of the magnet assembly 22 moving in the longitudinal extension direction of the main axis L can be reduced, thereby avoiding the problem that each magnet of the magnet assembly 22 detaches from the power output shaft 21 in the longitudinal extension direction of the main axis L.

[0030] Specifically, in an 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.

[0031] As Figure 2 shown, in an 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.

[0032] Through the above arrangement, 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, the movement of each magnet of the magnet assembly 22 in the longitudinal extension direction of the main axis L can be avoided, thereby avoiding the problem that each magnet of the magnet assembly 22 detaches from the power output shaft 21 in the longitudinal extension direction of the main axis L.

[0033] Specifically, in an 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 has 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.

[0034] In one embodiment, it is also possible to only have a blocking member 51 abut against one end face of the magnet assembly 22.

[0035] Specifically, in an 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 can be avoided that the blocking member 51 protrudes radially from the magnet assembly 22 along the main axis L, thereby avoiding interference with the assembly of components outside the magnet assembly 22; on the other hand, it can be avoided that the limiting effect is poor due to the small contact area between the blocking member 51 and the magnet assembly 22.

[0036] It should be noted that in the embodiments of the present utility model, 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 within the range of 50% to 100%.

[0037] As Figure 2 shown, in the embodiments of the present utility model, the blocking member 51 is adhesively bonded to at least one end face of the magnet assembly 22. In this way, the blocking member 51 can be fixed at 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.

[0038] Preferably, in the embodiments of the present utility model, the blocking member 51 is connected to the end face of the magnet assembly 22 by means of gluing.

[0039] In one embodiment, the blocking member 51 can also be abutted against the magnet assembly 22 by means of an elastic member 54.

[0040] As Figure 2 and Figure 3 shown, in the embodiments of the present utility model, 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.

[0041] Through the above settings, 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 the blocking member 51 from interfering with the assembly of components outside the magnet assembly 22.

[0042] It should be noted that in the embodiments of the present utility model, 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.

[0043] 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 perpendicular to the main axis L.

[0044] Specifically, in the embodiments of the present utility model, the cooperation mode between the blocking member 51 and the power output shaft 21 includes but is not limited to interference fit or clearance fit.

[0045] Specifically, in the embodiments of the present utility model, the shape of the blocking member 51 is not limited, and the material of the blocking member 51 includes but is not limited to plastics or steel. Among them, the influence of the metal material on the magnetic field of the magnet assembly 22 can be ignored.

[0046] 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.

[0047] like Figure 2 and Figure 4 As shown, in the embodiment of the utility model, the actuator also includes mounting grooves and two bearing components 52 arranged at both ends of the housing 10 along the longitudinal extension direction of the main axis L. The two bearing components 52 are respectively installed in the two mounting grooves to mechanically couple the power output shaft 21 to the housing 10; the anti-wear component 53 is located at the outer periphery of the power output shaft 21, and at least one of the two bearing components 52 is provided with an anti-wear component 53 on one side facing the magnet assembly 22; the elastic component 54 is located at the outer periphery of the power output shaft 21, one end of the elastic component 54 abuts against the anti-wear component 53, and the other end of the elastic component 54 abuts against the end face of the blocking component 51 or the magnet assembly 22.

[0048] In the above technical scheme, on the one hand, by providing an elastic member 54, and the two ends of the elastic member 54 are respectively abutted against the bearing member 52 and the magnet assembly 22 (or the blocking member 51), 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, thereby avoiding axial movement of the power output shaft 21; on the other hand, when the actuator vibrates, the elastic member 54 is affected and vibrates slightly, which will wear the dust cover of the bearing member 52 in a small range. After working for a long time, it will cause the problem of wearing out the dust cover, resulting in the jamming of the bearing ball, which will cause damage to the actuator. In this embodiment, by providing an anti-wear member 53, it can prevent the elastic member 54 from wearing the flat part of the dust cover of the bearing member 52, thereby avoiding failure of the bearing member 52 and avoiding damage to the actuator.

[0049] Preferably, in the embodiment of the present invention, the anti-wear component 53 is made of non-metallic material, which can reduce friction squeaking noise; the elastic component 54 is preferably a spring.

[0050] Specifically, in the embodiment of the present invention, the anti-wear component 53 is loosely matched with the power output shaft 21 and can move freely along the main axis L.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] Preferably, in the embodiments of the present utility model, the anti-wear member 53 is a plate-like structure. In this way, it is convenient for processing.

[0056] 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 by the sleeve and a part of the elastic member 54 can be covered, so that the elastic member 54 can perform telescopic deformation along the longitudinal extension direction of the main axis L.

[0057] 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.

[0058] In one embodiment, the anti-wear member 53 can be made of a non-metallic material.

[0059] 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.

[0060] 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.

[0061] In one embodiment, an anti-wear member 53 may be provided only on one side of any one of the two bearing members 52 facing the magnet assembly 22.

[0062] As Figure 1 and Figure 2 shown, in an embodiment of the present utility model, the actuator further includes a magnetic conduction bridge 25 installed on the housing 10. There are two stator members 23, and the two stator members 23 are arranged at intervals around the main axis L. Each stator member 23 includes an iron core 232 and a winding 231 wound around the iron core 232. The two iron cores 232 are conductively connected to each other through the magnetic conduction bridge 25. In this way, magnetic leakage of the iron core 232 can be effectively prevented to improve the efficiency of the actuator.

[0063] As Figure 2 shown, in an embodiment of the present utility model, an insulating layer 26 is provided on the side of the stator member 23 facing away from the power output shaft 21. In this way, it can prevent the magnetic conduction bridge 25 from scratching the winding 231 during assembly and avoid causing the actuator to short-circuit and fail.

[0064] Preferably, in an embodiment of the present utility model, the insulating layer 26 is an insulating sheet made of an insulating material. The insulating sheet is attached to the winding 231 or the insulating sheet is directly pressed on the winding 231 through a jig.

[0065] It should be noted that, in an embodiment of the present utility model, the 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 member is installed inside the housing 10. The two iron cores 232 are coaxially adapted to the rotor member. The magnetic conduction bridge 25 is installed on the housing 10, and the two iron cores 232 are magnetically conductively connected to each other through the magnetic conduction bridge 25. Among them, receiving grooves are formed on both side surfaces of the housing 10 at the positions of the windings 231. One end of each of the two iron cores 232 is exposed outside the receiving groove. The magnetic conduction bridge 25 is fixedly positioned in the receiving groove, and both ends of the magnetic conduction bridge 25 are attached to the two iron cores 232.

[0066] It should be noted that, in an embodiment of the present utility model, during the assembly process of the actuator, the magnetic conduction 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, there is a problem that the magnetic conduction bridge 25 is likely to scratch the winding 231 of the stator member 23, which will increase the defective rate of the actuator and thus lead to a problem of poor production consistency of the actuator. However, the actuator of this embodiment can avoid the problem that the magnetic conduction bridge 25 scratches the winding 231 during the installation process by providing the insulating layer 26, thereby solving the problems of production consistency and high defective rate, and better meeting the needs of different customer groups.

[0067] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects: By providing a blocking member against at least one end face of the magnet assembly, it is possible to limit a plurality of magnets of the magnet assembly in the longitudinal extension direction of the main axis L, so that the plurality of magnets of the magnet assembly can be more stably attached to the power output shaft. 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 moves in the longitudinal extension direction of the main axis can be reduced, thereby avoiding the problem that each magnet of the magnet assembly falls off the power output shaft in the longitudinal extension direction of the main axis.

[0068] The foregoing is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An actuator, characterized in that: include: Housing (10); A rotor component, comprising a power output shaft (21) extending longitudinally along a main axis (L) and passing through the housing (10), and a magnet assembly (22) and a blocking member (51) attached to the power output shaft (21), wherein at least one end surface of the magnet assembly (22) abuts against the blocking member (51) along the longitudinal extension direction of the main axis (L); 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), both end faces of the magnet assembly (22) abut against the blocking member (51).

3. The actuator according to claim 1, characterized in that The ratio of the contact area between the blocking member (51) and the magnet assembly (22) to the area of ​​the end surface of the magnet assembly (22) is in the range of 50% to 100%.

4. The actuator according to claim 1, characterized in that The blocking member (51) is bonded to at least one end surface of the magnet assembly (22).

5. The actuator according to claim 1, characterized in that: 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).

6. The actuator according to any one of claims 1 to 5, characterized in that: The actuator further comprises mounting grooves arranged at both ends of the housing (10) along the longitudinal extension direction of the main axis (L), and: Two bearing components (52) are respectively installed in the two installation grooves 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 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 end surface of the blocking member (51) or the magnet assembly (22).

7. The actuator according to claim 6, 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.

8. The actuator according to claim 6, 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.

9. The actuator according to claim 6, 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).

10. The actuator according to claim 6, 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.

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

12. The actuator according to any one of claims 1 to 5, 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).

13. The actuator according to any one of claims 1 to 5, 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).

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