Variable-frequency sweep vibration motor
By using the magnetic port in the frequency conversion sweep vibration motor to help the rotor return to its initial position, and combining it with frequency conversion technology control, the problem that the existing motor cannot achieve a large-swing brushing action is solved, achieving more efficient energy utilization and being more in line with the requirements of Paris. The toothbrushing method has the best brushing effect while reducing production costs.
Patent Information
- Application Number
- CN202420720096.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-09
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-04-09
AI Technical Summary
Existing sound wave vibration motors cannot achieve large-swing brushing actions, resulting in an increase in the cost of scanning toothbrushes, limiting their popularity and benefit groups.
A variable frequency sweep vibration motor is designed, which uses a magnetic port to help the rotor return to its initial position after rotation. It combines frequency conversion technology to control the rotor to achieve a larger swing, and reduces the energy demand for return by optimizing the magnetic field distribution.
It reduces the overall energy consumption of the motor, improves energy utilization efficiency, achieves a larger swing and a brushing action that is more in line with the Pasteur brushing method, improves the cleaning efficiency and effect of brushing, and reduces the need for complex mechanical components and electronic controls. components, reducing production costs.
Smart Images
Figure CN222381428U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, in particular to a variable frequency sweep vibration motor. Background Art
[0002] Electric toothbrushes use the rapid rotation or vibration of the motor core to produce high-frequency vibrations in the brush head, instantly breaking down the toothpaste into fine foam and deeply cleaning the gaps between teeth. At the same time, the vibration of the bristles can promote blood circulation in the mouth and have a massage effect on the gum tissue.
[0003] At present, electric toothbrushes have a sweeping vibration brushing mode, which realizes the integrated sweeping vibration of the brush rod and bristles and a larger swing amplitude, which is more in line with the Bass Technique. The characteristic of this brushing mode is that the brush head has a large swing amplitude, generally between 30-60 degrees. The existing sonic vibration motor cannot complete this large swing movement, and the motor that can achieve this performance uses a servo motor and a stepper motor structure, which is completed through servo technology control. This increases the cost of this brushing mode by an order of magnitude, limiting the popularity and beneficiary groups of sweeping vibration toothbrushes. Utility Model Content
[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a variable frequency sweep vibration motor.
[0005] The technical solution adopted by the utility model is as follows: a variable frequency sweeping vibration motor, comprising a shell, a rotor and a stator, the rotor having an initial position, a magnetic conductive port being arranged on the shell corresponding to the initial position of the rotor, the magnetic conductive port connecting the inside and the outside of the shell, the magnetic conductive port being used to assist the rotor to return to the initial position after the rotor rotates.
[0006] Preferably, the stator includes a coil frame and two coils wound on the coil frame, the two coils are arranged in parallel, the magnetic conductive opening is arranged parallel to the coils, the two coils are aligned in direction A, and the magnetic conductive opening is arranged between the two coils in direction A.
[0007] Preferably, the magnetic conductive opening is arranged in the middle of the two coils in direction A.
[0008] Preferably, the coil frame includes two coil frames plugged in along the axial direction of the rotor, the coil frame includes a rotor positioning portion and a coil winding portion arranged on both sides of the rotor positioning portion, and a limiting plate portion is arranged on the side of the coil winding portion away from the rotor positioning portion, and the two limiting plate portions are provided with a plug-in slot on one and a plug-in block matched with the plug-in slot on the other.
[0009] Preferably, the rotor includes a conduction shaft and a magnetic ring sleeved on the conduction shaft, and a first limit portion and a second limit portion are provided on the rotor positioning portion, the first limit portion is adapted to the conduction shaft and allows the conduction shaft to pass through, the second limit portion is adapted to the magnetic ring and one end of the magnetic ring can allow the magnetic ring to pass through, and there is a gap between the conduction shaft and the first limit portion and between the magnetic ring and the second limit portion.
[0010] Preferably, it also includes an end cover, a bearing and a sleeve, the end cover is connected to one end of the outer shell, the sleeve is arranged on the rotor and the two rotate synchronously, the sleeve is connected to the end cover through the bearing, a rotation limiting structure is arranged between the end cover and the sleeve, the rotation limiting structure is used to limit the rotation range of the rotor, the rotation limiting structure includes a rotation limiting groove arranged on the end cover and a limiting protrusion arranged on the sleeve, the rotation limiting groove is provided with a rotation area and a limiting area along the rotation direction of the limiting protrusion, and the limiting protrusion can only rotate along the rotation area.
[0011] Preferably, the housing further comprises end covers arranged at the front and rear ends, the end covers are provided with rivet grooves, and both ends of the housing are provided with rivet protrusions corresponding to the rivet grooves.
[0012] Preferably, it also includes end covers arranged at the front and rear ends of the shell, the end covers are provided with a first positioning protrusion corresponding to the magnetic guide port, the shell is provided with a first positioning groove toward the end cover, and the end cover is provided with a second positioning protrusion corresponding to the first positioning groove.
[0013] Preferably, the housing further comprises end covers arranged at the front and rear ends, the plug-in slot is arranged to penetrate toward the end cover, and the end cover is provided with a third positioning protrusion toward the plug-in slot.
[0014] Preferably, it further comprises an end cover arranged at the rear end of the shell, the two coils are both provided with wires, and the end cover is provided with a through hole for the wires to pass through.
[0015] The beneficial effects of the utility model are as follows: 1. The utility model utilizes the magnetic port to assist the rotor to return to its initial position after the rotor rotates, which can reduce the energy required for the motor to return to its original position, thereby reducing the overall energy consumption of the motor and improving energy utilization efficiency. Moreover, through frequency conversion technology control, the rotor can achieve a larger swing amplitude. Within this swing amplitude range, different swing angles can be achieved by changing different frequencies, which is more in line with the requirements of the Bass brushing method for brushing actions and helps to improve the cleaning efficiency and effect of brushing.
[0016] 2. Compared with the traditional complex mechanical structure combined with the servo system to accurately control the swing of the brush head, the utility model reduces complex mechanical parts and electronic control elements, can reduce failure points, improve the reliability and durability of the motor, and reduce production costs, so that more consumers can afford this efficient brushing mode electric toothbrush, thereby expanding the potential market beneficiary group. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.
[0018] Figure 1 For the utility model Figure 1 ;
[0019] Figure 2 It is an exploded view of part of the structure of the utility model;
[0020] Figure 3 It is an exploded view of the utility model;
[0021] Figure 4 It is a schematic diagram of the coil frame in the utility model;
[0022] Figure 5 It is a schematic diagram of the coil skeleton and the coil in the utility model;
[0023] Figure 6 It is a cross-sectional view of the coil frame in the utility model;
[0024] Figure 7 For the utility model Figure 2 ;
[0025] Figure 8 It is a schematic diagram of the end cover in the utility model;
[0026] Fig. 9 It is a partial schematic diagram of the utility model;
[0027] Fig.10 This is a schematic diagram of the utility model without the housing;
[0028] Fig.11 It is a cross-sectional view of the utility model. DETAILED DESCRIPTION
[0029] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.
[0030] In the description of the present application, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise specified, "plurality" means two or more.
[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0032] In the description of this application, it should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.
[0033] Embodiment 1:
[0034] like Figures 1 to 11 As shown, a variable frequency sweep vibration motor includes a shell 1, a rotor and a stator. The rotor has an initial position. Usually, the rotor is controlled to rotate and return to the initial position by frequency conversion technology. In this embodiment, a magnetic port 2 is set on the shell 1 corresponding to the initial position of the rotor. The magnetic port 2 connects the inside and the outside of the shell 1. The magnetic port 2 is used to assist the rotor to return to the initial position after the rotor rotates. The magnetic port 2 can change the magnetic field distribution and provide assistance when the rotor returns to the initial position, which can reduce the energy required for the motor to return to the initial position, thereby reducing the overall energy consumption of the motor and improving energy utilization efficiency.
[0035] Secondly, through frequency conversion technology control, the rotor can achieve a larger swing amplitude. Within this swing amplitude range, different swing angles can be achieved by changing different frequencies, which is more in line with the requirements of the Bass brushing method for brushing actions and helps to improve the cleaning efficiency and effectiveness of brushing.
[0036] At the same time, compared with the traditional complex mechanical structure combined with the servo system to accurately control the swing of the brush head, it reduces complex mechanical parts and electronic control components, can reduce failure points, improve the reliability and durability of the motor, and reduce production costs, so that more consumers can afford this efficient brushing mode electric toothbrush, thereby expanding the potential market beneficiary groups.
[0037] Furthermore, if Figure 2 As shown, the stator includes a coil skeleton 3 and two coils 4 wound on the coil skeleton 3, the two coils 4 are arranged in parallel, that is, the two coils 4 are arranged in parallel up and down after being wound on the coil skeleton 3, the rotor is located between the two coils 4, the magnetic port 2 is arranged in parallel with the coil 4, and the two coils 4 are aligned in direction A, wherein the parallel arrangement and the aligned arrangement are to make the magnetic fields generated by the two coils 4 symmetrical, rather than being limited to the structural size of the coils, the magnetic port 2 is arranged between the two coils 4 in direction A, so that the distribution of the magnetic field can be optimized during the operation of the motor, the magnetic field lines are concentrated through the magnetic port 2, and a certain restoring force is provided when the rotor rotates, so that the rotor can return to its initial position more quickly, reducing the energy loss during the rotation of the motor and improving the rotation efficiency and response speed of the motor.
[0038] In this embodiment, the magnetic opening 2 is arranged in the middle of the two coils 4 in the A direction, so that the effect of the magnetic force on the rotor is more balanced, thereby providing a consistent restoring force for the rotor after forward and reverse rotation.
[0039] Furthermore, the coil frame 3 includes two coil frames 31 plugged in along the axial direction of the rotor, and the two coil frames 31 can be easily docked and plugged in along the axial direction of the rotor, which simplifies the assembly process, reduces the assembly difficulty, and improves the assembly efficiency. In addition, plugging in along the axial direction of the rotor can reduce the impact of the vibration motor on the strength of the coil frame 3 when the vibration motor vibrates at high frequency compared to the left-right matching structure.
[0040] The coil frame 31 includes a rotor positioning portion 311 and a coil winding portion 312 disposed on both sides of the rotor positioning portion 311. A limiting plate portion 313 is disposed on one side of the coil winding portion 312 away from the rotor positioning portion 311. Figure 5As shown, the two coils 4 are correspondingly wound on the two coil winding parts 312, and are limited between the limiting plate part 313 and the rotor positioning part 311. The two limiting plate parts 313 are provided with a plug-in slot 301 on one, and a plug-in block 302 matched with the plug-in slot 301 on the other. In this way, the two coil frames 31 only need one mold, which reduces the production cost of the product.
[0041] Furthermore, the coil winding portion 312 is provided with a plurality of vent holes 3121 along the axial direction. Figure 4 As shown, four ventilation holes 3121 are symmetrically arranged, which help to dissipate heat when the coil 4 is wound on the coil winding part 312 and reduce the accumulation of heat on the coil 4.
[0042] Furthermore, the rotor includes a conductive shaft 5 and a magnetic ring 6 sleeved on the conductive shaft 5. The conductive shaft 5 and the magnetic ring 6 can be connected by bonding, wherein the magnetic ring 6 can be divided into a pair of poles, two pairs of poles, etc. Since a pair of poles is easy to magnetize, in this embodiment, a pair of poles is magnetized to manufacture the rotor.
[0043] The rotor positioning portion 311 is provided with a first limiting portion 3111 and a second limiting portion 3112. The first limiting portion 3111 is adapted to the conduction shaft 5 and allows the conduction shaft 5 to pass through. The second limiting portion 3112 is adapted to the magnetic ring 6 and one end of the magnetic ring 6 can pass through. Figure 6 As shown, the first limiting portion 3111 is a channel adapted to the conduction shaft 5, and the second limiting portion 3112 is a channel adapted to the magnetic ring 6. There is a gap between the conduction shaft 5 and the first limiting portion 3111 and between the magnetic ring 6 and the second limiting portion 3112, providing space for the rotor to vibrate due to frequency.
[0044] Furthermore, it also includes an end cover 7, a bearing 8 and a sleeve 9, the end cover 7 is connected to one end of the outer shell 1, the sleeve 9 is arranged on the rotor and the two rotate synchronously, the sleeve 9 is connected to the end cover 7 through the bearing 8. In this embodiment, the end cover 7 is divided into a front cover and a rear cover, the bearing 8 is a front bearing and a rear bearing, the sleeves are a front sleeve and a rear sleeve, and the front cover and the rear cover are respectively arranged at the front and rear ends of the outer shell 1.
[0045] The end cover 7 and the shaft sleeve 9 are provided with a rotation limiting structure, wherein the rotation limiting structure can be provided between the front end cover and the front shaft sleeve, or between the rear end cover and the rear shaft sleeve.
[0046] The rotation limiting structure is used to limit the rotation range of the rotor through a mechanical structure. For example, normally through frequency conversion control, the forward and reverse rotation range of the rotor can reach 180°, while the rotation limiting structure makes the rotor rotation range 120°.
[0047] In this embodiment, if Figure 7 As shown, the rotation limiting structure includes a rotation limiting groove 71 arranged on the end cover 7 and a limiting protrusion 91 arranged on the shaft sleeve 9, the limiting protrusion 91 is a straight-line protrusion, and the rotation limiting groove 71 is provided with a rotation area 711 and a limiting area 712 along the rotation direction of the limiting protrusion 91, and the limiting protrusion 91 can rotate along the rotation area 711. Specifically, the spacing of the rotation area 711 is greater than the length of the limiting protrusion 91, which can provide a rotation space for the limiting protrusion 91, and the spacing of the limiting area 712 is less than the length of the limiting protrusion 91, and the limiting protrusion 91 cannot be rotated into the limiting area 712. In this way, the rotation range of the rotor can be limited, so that the motor can be better applied to electric toothbrushes to avoid excessive swing of the brush head.
[0048] Furthermore, a rivet groove 701 is provided on the end cover 7, and rivet protrusions 101 are provided at both ends of the shell 1 corresponding to the rivet groove 701. After assembly is completed, the rivet protrusions 101 are knocked into the rivet groove 701, and the front and rear end covers are connected to the shell 1 through this structure, so that the motor structure is firm and reliable.
[0049] Furthermore, a first positioning protrusion 702 is provided on the end cover 7 corresponding to the magnetic port 2, a first positioning groove 102 is provided on the outer shell 1 toward the end cover 7, and a second positioning protrusion 703 is provided on the end cover 7 corresponding to the first positioning groove 102. In the present embodiment, the first positioning protrusion 702 and the second positioning protrusion 703 are arranged in a straight line relative to the end cover 7, and both end covers 7 are limited in the circumferential direction with the outer shell 1 through this structure.
[0050] Furthermore, if Fig.10 As shown, the plug-in slot 301 is arranged to penetrate toward the end cover 7 , and the end cover 7 is provided with a third positioning protrusion 704 toward the plug-in slot 301 , so that the coil skeleton 3 is limited relative to the two end covers 7 , and then fixed relative to the housing 1 through the two end covers 7 .
[0051] Furthermore, both coils 4 are provided with a wire 10 for energizing the coils 4 to realize variable frequency control. The end cover 7 is provided with a through hole 705 for the wire 10 to pass through, so that the wire can be protected and the wiring can be neat.
[0052] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.
Claims
1. A variable frequency sweep vibration motor, comprising a housing (1), a rotor and a stator, characterized in that: The rotor has an initial position, and a magnetic conductive opening (2) is arranged on the housing (1) corresponding to the initial position of the rotor, the magnetic conductive opening (2) connects the inside and the outside of the housing (1), and the magnetic conductive opening (2) is used to assist the rotor to return to the initial position after the rotor rotates.
2. A variable frequency sweep vibration motor according to claim 1, characterized in that: The stator comprises a coil frame (3) and two coils (4) wound on the coil frame (3); the two coils (4) are arranged in parallel; the magnetic conductive opening (2) is arranged in parallel with the coils (4); the two coils (4) are aligned in direction A; and the magnetic conductive opening (2) is arranged between the two coils (4) in direction A.
3. A variable frequency sweep vibration motor according to claim 2, characterized in that: The magnetic conductive opening (2) is arranged in the middle of the two coils (4) in direction A.
4. A variable frequency sweep vibration motor according to claim 2 or 3, characterized in that: The coil frame (3) comprises two coil frames (31) plugged into each other along the axial direction of the rotor, the coil frame (31) comprises a rotor positioning portion (311) and coil winding portions (312) arranged on both sides of the rotor positioning portion (311), a limiting plate portion (313) is arranged on one side of the coil winding portion (312) away from the rotor positioning portion (311), and the two limiting plate portions (313) are provided with a plug-in slot (301) on one of them and a plug-in block (302) matched with the plug-in slot (301) on the other.
5. A variable frequency sweep vibration motor according to claim 4, characterized in that: The rotor comprises a conduction shaft (5) and a magnetic ring (6) sleeved on the conduction shaft (5); a first limiting portion (3111) and a second limiting portion (3112) are provided on the rotor positioning portion (311); the first limiting portion (3111) is matched with the conduction shaft (5) and allows the conduction shaft (5) to pass through; the second limiting portion (3112) is matched with the magnetic ring (6) and one end of the magnetic ring (6) allows the magnetic ring (6) to pass through; and there is a gap between the conduction shaft (5) and the first limiting portion (3111) as well as between the magnetic ring (6) and the second limiting portion (3112).
6. A variable frequency sweep vibration motor according to claim 2 or 3, characterized in that: The invention also comprises an end cover (7), a bearing (8) and a shaft sleeve (9), wherein the end cover (7) is connected to one end of the housing (1), the shaft sleeve (9) is arranged on the rotor and the two rotate synchronously, the shaft sleeve (9) is connected to the end cover (7) via the bearing (8), a rotation limiting structure is arranged between the end cover (7) and the shaft sleeve (9), the rotation limiting structure is used to limit the rotation range of the rotor, the rotation limiting structure comprises a rotation limiting groove (71) arranged on the end cover (7) and a limiting protrusion (91) arranged on the shaft sleeve (9), the rotation limiting groove (71) is provided with a rotation area (711) and a limiting area (712) along the rotation direction of the limiting protrusion (91), and the limiting protrusion (91) can only rotate along the rotation area (711).
7. The variable frequency sweep vibration motor according to claim 1, characterized in that: It also includes end covers (7) arranged at the front and rear ends of the housing (1), the end covers (7) being provided with riveting grooves (701), and riveting protrusions (101) being provided at both ends of the housing (1) corresponding to the riveting grooves (701).
8. A variable frequency sweep vibration motor according to claim 1 or 7, characterized in that: It also includes an end cover (7) arranged at the front and rear ends of the housing (1), the end cover (7) being provided with a first positioning protrusion (702) corresponding to the magnetic guide port (2), the housing (1) being provided with a first positioning groove (102) facing the end cover (7), and the end cover (7) being provided with a second positioning protrusion (703) corresponding to the first positioning groove (102).
9. The variable frequency sweep vibration motor according to claim 4, characterized in that: It also includes end covers (7) arranged at the front and rear ends of the housing (1), the plug-in slot (301) is arranged to penetrate in the direction of the end cover (7), and the end cover (7) is provided with a third positioning protrusion (704) towards the plug-in slot (301).
10. The variable frequency sweep vibration motor according to claim 2, characterized in that: It also includes an end cover (7) arranged at the rear end of the housing (1), the two coils (4) are each provided with a wire (10), and the end cover (7) is provided with a through hole (705) for the wire (10) to pass through.