Rotor for a vibration motor and vibration motor

Abstract

The application discloses a rotor of a vibration motor and the vibration motor. The rotor comprises a rotating disc, a first coil, a second coil and a vibrator. The rotating disc is provided with a shaft hole for being connected with a rotating shaft, and comprises a first part and a second part located on different sides of the shaft hole; the first coil and the second coil are arranged on the rotating disc, and a first inner hole of the first coil and a second inner hole of the second coil are located on the first part; and the vibrator is located on the second part. The first coil and the second coil are mainly distributed on the first part, the vibrator is arranged on the second part on the other side of the rotating disc, the idle space of the second part is larger, and a large space can be reserved for the vibrator, so that the volume of the vibrator can be increased, the eccentric effect of the rotor is better, and the vibration effect can be improved. On the other hand, after the volume of the vibrator is increased, the material of the vibrator can be replaced by other materials with lower density and price, so that the cost of the vibration motor can be reduced.

Description

Technical Field

[0001] This application relates to the field of vibration motor technology, and in particular to a rotor and a vibration motor. Background Technology

[0002] The vibration of a mobile phone is achieved by a vibration motor built into the phone. A vibration motor is a device that converts electrical energy into mechanical vibration. As a special type of vibration motor, the flat vibration motor has gained market favor due to its light and thin characteristics.

[0003] Among them, the principle of the flat vibration motor is to generate periodic mechanical vibration by rotating an eccentric mass. It is widely used in mobile phones, wristbands, industrial equipment, medical instruments and other fields.

[0004] In related technologies, the technical problems of vibration motors are: high cost and mediocre vibration effect. Summary of the Invention

[0005] The main technical problem solved by this application is to provide a rotor and a vibration motor that can reduce the cost of the vibration motor and improve its vibration effect.

[0006] To address the aforementioned problems, this application provides a rotor for a vibration motor, the rotor comprising a turntable, a first coil, a second coil, and an oscillator: the turntable has a shaft hole for connecting to a rotating shaft, the turntable comprising a first portion and a second portion located on different sides of the shaft hole; the first coil and the second coil are disposed on the turntable, the first inner hole of the first coil and the second inner hole of the second coil are both located in the first portion; the oscillator is located in the second portion.

[0007] As described above, the first and second coils are mainly distributed in the first part, while the oscillator is placed in the second part on the other side of the turntable. The second part has more unused space, allowing for sufficient space to be reserved for the oscillator, thereby increasing its volume and improving the rotor's eccentricity, which in turn improves the vibration effect. On the other hand, by increasing the volume of the oscillator, the material of the oscillator can be replaced with other materials with lower density and price, thus reducing the cost of the vibration motor.

[0008] In one possible implementation, the oscillator is a copper oscillator.

[0009] As mentioned above, the volume of the oscillator in this application can be larger, thereby allowing the high-density tungsten oscillator to be replaced with a low-density copper oscillator. Copper is cheaper, which can reduce the cost of the vibration motor.

[0010] In one possible implementation, the first portion is formed with an eccentric portion.

[0011] By forming an eccentric part in the first part, the mass difference between the two sides of the shaft hole on the rotor can be increased, which can further improve the eccentric effect and improve the vibration effect.

[0012] In one possible implementation, the eccentric portion is located in the region between the first coil and the second coil.

[0013] This setting allows the eccentric part to be further away from the oscillator, which can improve the eccentric effect.

[0014] In one possible implementation, the eccentric portion is located on the side of the first portion away from the shaft hole.

[0015] This also allows the eccentric part to be further away from the oscillator, thus improving the eccentric effect.

[0016] In one possible implementation, the eccentric portion is a void structure.

[0017] This setting creates a gap in the first part of the turntable to improve the eccentricity effect.

[0018] In one possible implementation, the eccentric portion is a mesh structure.

[0019] This setup creates a mesh structure in the first part of the turntable to improve the eccentricity effect.

[0020] In one possible implementation, the density of the material of the eccentric portion is less than the density of the first portion of the turntable, and / or the thickness of the eccentric portion is less than the thickness of the first portion of the turntable.

[0021] The above settings can improve the eccentricity effect on both sides of the rotor shaft hole.

[0022] In one possible implementation, the size of the eccentric portion gradually increases in the direction opposite to the shaft hole.

[0023] The above measures can maximize the size of the eccentric part.

[0024] To address the aforementioned problems, this application also provides a vibration motor comprising the rotor described in any of the above embodiments.

[0025] Unlike existing technologies, the advantages of this application are as follows: the first and second coils are mainly distributed in the first part, while the oscillator is placed in the second part on the other side of the turntable. The second part has more unused space, allowing for sufficient space to be reserved for the oscillator, thereby increasing its volume and improving the rotor's eccentricity, which in turn improves the vibration effect. Furthermore, by increasing the volume of the oscillator, its material can be replaced with other materials that are lower in density and price, thus reducing the cost of the vibration motor. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the rotor of the vibration motor of this application in the first embodiment; Figure 2 This is a schematic diagram of the rotor of the vibration motor of this application in a second embodiment; Figure 3 This is a schematic diagram of the rotor of the vibration motor of this application in a third embodiment.

[0028] Figure label: 100. Rotor; 10. Turntable; 11. Shaft hole; 12. First part; 13. Second part; 14. First coil; 141. First inner hole; 15. Second coil; 151. Second inner hole; 16. Eccentric part; 17. Vibrator; 171. First region; 172. Second region. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the application. The singular forms “a,” “said,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms, unless otherwise clearly indicated above. “Multiple” generally includes at least two, but does not exclude the inclusion of at least one.

[0031] It should be understood that the term "and / or" used herein is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Furthermore, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship. The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0032] It should be understood that the terms "comprising," "including," or any other variations used herein are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in every place in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0034] Existing vibration motors are costly and have mediocre vibration effects. To address these technical problems, this application provides a rotor for a vibration motor and a vibration motor in general. In this rotor, the first coil and the second coil are mainly distributed in the first part, while the oscillator is set in the second part on the other side of the turntable, which effectively solves the aforementioned technical problems.

[0035] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the rotor of the vibration motor of this application in the first embodiment; Figure 2 This is a schematic diagram of the rotor of the vibration motor of this application in a second embodiment.

[0036] In one specific embodiment, the rotor 100 includes a turntable 10, a first coil 14, a second coil 15, and an oscillator 17. The turntable 10 has a shaft hole 11 for connecting to a rotating shaft (not shown). The turntable 10 includes a first portion 12 and a second portion 13 located on different sides of the shaft hole 11. The first coil 14 and the second coil 15 are disposed on the turntable 10. The first inner hole 141 of the first coil 14 and the second inner hole 151 of the second coil 15 are both located in the first portion 12. The oscillator 17 is located in the second portion 13.

[0037] The rotor 100 is used to generate power through electromagnetic action after the first coil 14 and the second coil 15 are energized, so as to rotate around the rotating shaft of the vibration motor (not shown). The rotor 100 is an eccentric rotor, meaning that the center of gravity of the rotor 100 is not at the shaft hole 11, and the weights on both sides of the shaft hole 11 are different, thus the eccentric rotor 100 can generate vibration during rotation. The rotor 100 includes a turntable 10. In this embodiment, the turntable 10 is made of plastic. The material of the turntable 10 can include one or more plastic materials such as polyoxymethylene, glass fiber reinforced nylon, and liquid crystal polymer. The plastic turntable 10 has good insulation and is less prone to leakage problems. In addition, the plastic turntable 10 has a moderate weight, which facilitates the coordination with the vibrator 17 to adjust the eccentric mass, which is beneficial to the vibration effect. The first coil 14 and the second coil 15 are used to correspond to the different poles of the magnets inside the vibration motor to generate continuous rotation through electromagnetic action. The vibrator 17 acts as a counterweight. Located on one side of the turntable 10, it increases the weight on that side, thus achieving eccentricity of the rotor 100. In related technologies, the main bodies of the first coil 14, the second coil 15, and the vibrator 17 are all located in the first part 12 of the turntable 10. The first part 12 has limited unused space, and the vibrator 17 is small in size. The vibrator 17 needs to be made of high-density tungsten, which is expensive, resulting in a high cost for the vibration motor. In this embodiment, the vibrator 17 is moved to the second part 13 of the turntable 10. The main bodies of the first coil 14 and the second coil 15 are located in the first part 12 of the turntable 10, meaning the vibrator 17 is positioned on the side of the turntable 10 with the shaft hole 11 facing away from the first coil 14 and the second coil 15. By arranging the oscillator 17 on the second part 13 of the turntable 10, more unused space is available on the second part 13, allowing for a larger volume of the oscillator 17. This increased volume eliminates the need for expensive tungsten to manufacture the oscillator 17; materials such as copper and aluminum can be used, reducing manufacturing costs and consequently lowering the cost of the vibration motor. The oscillator 17 can be fixed to the second part 13 of the turntable 10 using methods such as clipping or screw connection. The shape of the oscillator 17 can be circular, fan-shaped, or an irregular polygon.

[0038] Unlike existing technologies, this application provides a rotor 100 for a vibration motor. The first coil 14 and the second coil 15 of the rotor 100 are mainly distributed in a first portion 12, while the oscillator 17 is positioned in a second portion 13 on the other side of the turntable 10. The second portion 13 has more unused space, providing sufficient room for the oscillator 17, thereby increasing its volume and improving the eccentricity of the rotor 100, thus enhancing the vibration effect. Furthermore, by increasing the volume of the oscillator 17, its material can be replaced with other materials that are lower in density and price, thereby reducing the cost of the vibration motor.

[0039] In some embodiments, the oscillator 17 is a copper oscillator.

[0040] In this embodiment, the oscillator 17 is a copper oscillator. Compared to an oscillator 17 made of tungsten, copper is cheaper, resulting in lower costs and reducing the cost of the vibration motor. In other embodiments, the oscillator 17 can also be an aluminum oscillator, an iron oscillator, a ceramic oscillator, etc.

[0041] In some embodiments, the first portion 12 is formed with an eccentric portion 16.

[0042] The eccentric portion 16 is used to further increase the eccentricity of the rotor 100, thereby improving the vibration effect of the vibratory motor. The oscillator 17 is located in the second part 13 and increases the mass of the second part 13. The eccentric portion 16 is formed from the first part 12 and decreases the mass of the first part 12. The oscillator 17 and the eccentric portion 16 work together to improve the eccentricity of the rotor 100, thus improving the vibration effect of the vibratory motor. The first part 12 can have one or more eccentric portions 16. When multiple eccentric portions 16 are provided, they can be connected or spaced apart in the first part 12. The shape of the eccentric portion 16 can be rectangular, triangular, circular, irregular polygonal, etc.

[0043] In some embodiments, the eccentric portion 16 is located in the region between the first coil 14 and the second coil 15.

[0044] The first coil 14 and the second coil 15 are arranged in a spaced array in the first portion 12. In this embodiment, the eccentric portion 16 is located in the region between the first coil 14 and the second coil 15. This arrangement allows for a larger spacing between the eccentric portion 16 and the second portion 13, thereby further improving the eccentricity effect of the eccentric portion 16. In some embodiments, the eccentric portion 16 can also be located on the side of the first coil 14 facing away from the second coil 15. In other embodiments, the eccentric portion 16 can also be located on the side of the second coil 15 facing away from the first coil 14. In still some embodiments, there can be multiple eccentric portions 16, which can be simultaneously located in the region between the first coil 14 and the second coil 15, on the side of the first coil 14 facing away from the second coil 15, and on the side of the second coil 15 facing away from the first coil 14.

[0045] In some other embodiments, the rotor 100 is generally circular, and a corner of the first part 12 of the circular rotor 100 is cut off, which can further reduce the mass of the first part 12 and improve the eccentricity effect of the rotor 100.

[0046] In some embodiments, the eccentric portion 16 is located on the side of the first portion 12 away from the shaft hole 11.

[0047] By positioning the eccentric portion 16 on the side of the first portion 12 away from the shaft hole 11, the distance between the eccentric portion 16 and the second portion 13 can be increased, thereby improving the eccentricity effect of the eccentric portion 16. In other embodiments, the eccentric portion 16 may also be located on the side of the first portion 12 closer to the shaft hole 11.

[0048] In some embodiments, the eccentric portion 16 is a vacant structure.

[0049] In this embodiment, the eccentric portion 16 is a gap structure, meaning that the first part 12 of the turntable 10 has its mass reduced by forming a gap, which is beneficial to improving the eccentricity effect. Specifically, the gap structure is a notch of a predetermined shape formed in the first part 12 of the turntable 10. In this embodiment, the shape of the notch is trapezoidal; in some other embodiments, the shape of the notch can also be triangular, circular, rectangular, irregular polygonal, or other shapes. In addition, in this embodiment, the gap structure in the first part 12 avoids the shaft hole 11 and wiring area of ​​the turntable 10, and the gap structure is only formed by local material removal in the non-core bearing area of ​​the first part 12 of the turntable 10. In this embodiment, the eccentric portion 16 is a gap structure, meaning that the first part 12 of the turntable 10 has its mass reduced by forming a gap. Specifically, by removing part of the plastic substrate from the first part 12 of the turntable 10 to form a gap, the mass of the first part 12 of the turntable 10 is significantly less than that of the second part 13 of the turntable 10, thereby increasing the mass difference between the two sides of the turntable 10 and improving the eccentricity effect. Furthermore, the dimensions of this missing structure can be flexibly designed according to actual vibration requirements. By adjusting the depth, width, and extension range of the notch, the eccentricity of the turntable 10 can be precisely controlled, making the centrifugal force generated when the rotor 100 rotates more in line with the preset vibration intensity requirements. At the same time, the use of the missing structure reduces the mass of the first part 12, which not only saves material costs but also effectively controls the overall weight of the turntable 10, adapting to the design requirements of ultra-thin and lightweight flat vibration motors. Moreover, the setting of the missing structure does not affect the stability of the coil layout on the turntable 10, nor does it interfere with the fitting accuracy between the rotor 100 and the rotating shaft, thus balancing eccentricity, structural strength, and assembly compatibility.

[0050] Please refer to the following: Figure 3 , Figure 3 This is a schematic diagram of the rotor of the vibration motor according to the present application in a third embodiment. In some embodiments, the eccentric portion 16 is a mesh structure.

[0051] In this embodiment, the eccentric part 16 is a mesh structure. Unlike the previous embodiment, the eccentric part 16 with the mesh structure does not need to form a notch in the first part 12. Thus, the eccentric part 16 can reduce the mass of the first part 12, and the eccentric part 16 with the mesh structure will not affect the integrity of the first part 12, thus ensuring the structural strength and aesthetics of the turntable 10.

[0052] In some embodiments, the density of the material of the eccentric portion 16 is less than the density of the first portion 12 of the turntable 10.

[0053] Unlike the previous embodiments, in this embodiment, the eccentric portion 16 is made of a material with a lower density than the turntable 10. The material used for the eccentric portion 16 can include lightweight plastics, lightweight composite materials, etc. By using a less dense material for the eccentric portion 16, the weight of the first part 12 can be reduced, improving the eccentric effect while maintaining the aesthetics of the turntable 10. The eccentric portion 16 can be fixedly mounted on the first part 12 of the turntable 10 using methods such as snap-fitting or screw connection.

[0054] In some embodiments, the thickness of the eccentric portion 16 is less than the thickness of the first portion 12 of the turntable 10.

[0055] Unlike the previous embodiments, in this embodiment, the eccentric portion 16 is formed in the first portion 12 by thinning. For example, the difference between the thickness of the eccentric portion 16 and the thickness of the first portion 12 of the turntable 10 can be a reasonable value such as 0.5 mm, 0.4 mm, or 0.6 mm. By forming the eccentric portion 16 by thinning, the mass of the first portion 12 can be reduced, the eccentric effect can be improved, and the integrity of the turntable 10 can be maintained.

[0056] In some embodiments, the eccentric portion 16 is a hollow structure formed by the first portion 12.

[0057] Unlike the previous embodiments, in this embodiment, the eccentric portion 16 is formed by a hollow structure. The hollow structure reduces the mass of the first part 12 and improves the eccentric effect. The hollow eccentric portion 16 eliminates the need for a notch in the turntable 10, and the eccentric portion 16 does not affect the integrity of the first part 12, thus ensuring the structural strength and aesthetics of the turntable 10.

[0058] In some embodiments, the size of the eccentric portion 16 gradually increases along the direction away from the shaft hole 11.

[0059] In this embodiment, the eccentric portion 16 is arranged in a trapezoidal shape, which allows the eccentric portion 16 to occupy more space between the first coil 14 and the second coil 15, thereby increasing the size of the eccentric portion 16 and improving its eccentricity effect.

[0060] In some embodiments, the oscillator 17 includes a first region 171 and a second region 172. The first region 171 is the area where the oscillator 17 connects to the turntable 10, and the second region 172 faces away from the turntable 10 relative to the first region 171. In some embodiments, the thickness of the first region 171 is less than the thickness of the second region 172. The first region 171 is connected to the turntable 10 by injection molding or snap-fit, so that after the oscillator 17 is fixed to the turntable 10, the overall appearance of the rotor 100 is flat, improving its aesthetics.

[0061] Unlike existing technologies, this application provides a rotor 100 for a vibration motor, which includes a turntable 10, a first coil 14, a second coil 15, and an oscillator 17. The turntable 10 has a shaft hole 11 for connection to a rotating shaft. The turntable 10 includes a first portion 12 and a second portion 13 located on different sides of the shaft hole 11. The first coil 14 and the second coil 15 are disposed on the turntable 10, with the first inner hole 141 of the first coil 14 and the second inner hole 151 of the second coil 15 both located in the first portion 12. The oscillator 17 is located in the second portion 13. As described above, the first coil 14 and the second coil 15 are mainly distributed in the first portion 12, while the oscillator 17 is disposed in the second portion 13 on the other side of the turntable 10. The second portion 13 has more unused space, providing sufficient space for the oscillator 17, thereby increasing the volume of the oscillator 17 and improving the eccentricity of the rotor 100, thus enhancing the vibration effect. On the other hand, by increasing the volume of the oscillator 17, the material of the oscillator 17 can be replaced by other materials with lower density and price, thereby reducing the cost of the vibration motor.

[0062] Correspondingly, this application also provides a vibration motor (not shown), which includes a rotor 100 of any of the above embodiments. The rotor 100 includes a turntable 10, a first coil 14, a second coil 15, and an oscillator 17. The turntable 10 has a shaft hole 11 for connecting to a rotating shaft. The turntable 10 includes a first portion 12 and a second portion 13 located on different sides of the shaft hole 11. The first coil 14 and the second coil 15 are disposed on the turntable 10. The first inner hole 141 of the first coil 14 and the second inner hole 151 of the second coil 15 are both located in the first portion 12. The oscillator 17 is located in the second portion 13.

[0063] As described above, the first coil 14 and the second coil 15 are mainly distributed in the first part 12, while the oscillator 17 is placed in the second part 13 on the other side of the turntable 10. The second part 13 has more unused space, which can provide enough space for the oscillator 17, thereby increasing the volume of the oscillator 17 and improving the eccentricity of the rotor 100, thus improving the vibration effect. On the other hand, by increasing the volume of the oscillator 17, the material of the oscillator 17 can be replaced with other materials with lower density and price, thereby reducing the cost of the vibration motor.

[0064] The above are merely embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A rotor for a vibration motor, characterized in that, The rotor includes: A turntable having a shaft hole for connection with a rotating shaft, the turntable comprising a first portion and a second portion located on different sides of the shaft hole; A first coil and a second coil are disposed on the turntable, and the first inner hole of the first coil and the second inner hole of the second coil are both located in the first part; The oscillator is located in the second part.

2. The rotor according to claim 1, characterized in that, The oscillator is a copper oscillator.

3. The rotor according to claim 2, characterized in that, The first part has an eccentric portion.

4. The rotor according to claim 3, characterized in that, The eccentric portion is located in the region between the first coil and the second coil.

5. The rotor according to claim 3, characterized in that, The eccentric portion is located on the side of the first part away from the shaft hole.

6. The rotor according to claim 3, characterized in that, The eccentric portion is a void structure.

7. The rotor according to claim 3, characterized in that, The eccentric portion has a mesh structure.

8. The rotor according to claim 3, characterized in that, The density of the material of the eccentric part is less than the density of the first part of the turntable, and / or the thickness of the eccentric part is less than the thickness of the first part of the turntable.

9. The rotor according to claim 3, characterized in that, The size of the eccentric portion gradually increases in the direction opposite to the shaft hole.

10. A vibration motor, characterized in that, The vibration motor includes the rotor as described in any one of claims 1-9.

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