Linear vibration motor
By introducing counterweights into the vibration components of the linear vibration motor to increase mass, the problem of insufficient vibration momentum near the resonance frequency is solved, higher vibration sense and lower power consumption are achieved, and the energy-saving needs of terminal products are met.
Patent Information
- Application Number
- CN202420691888.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-07
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-04-07
AI Technical Summary
The existing linear vibration motor has low vibration momentum near the resonance frequency, which leads to higher power consumption in the case of increased energy saving requirements, which cannot meet the energy saving needs of terminal products.
By introducing counterweights into the vibration assembly, the mass of the vibration assembly is increased, thereby increasing the vibration momentum and transmitting to the stator subassembly through the magnetic spring, enhancing the vibration sense while maintaining a wide frequency response.
On the basis of ensuring wide frequency response, the vibration momentum near the resonance frequency of the linear vibration motor is significantly improved, power consumption is reduced, and energy-saving needs of terminal products are met.
Smart Images
Figure CN222169589U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, in particular to a linear vibration motor. Background Art
[0002] The current popular tactile feedback technology uses motor vibration to achieve a realistic sense of touch. The current popular motor structures include rotor motors and linear motors, and linear motors are divided into physical spring motors and magnetic spring motors.
[0003] like Figure 1 As shown, the existing magnetic spring motor includes a housing 1 and a vibration component 2, a stator component 3 and a sleeve 5 arranged inside the housing 1. The vibration component 2 and the stator component 3 are connected by welding, riveting, or gluing. The vibration component 2 includes a plurality of main magnetic steels 201 and a pole core 202 arranged between adjacent main magnetic steels 201. The stator component 3 includes an end magnetic steel 301 and a coil 302. The opposite magnetic poles of the main magnetic steel 201 and the end magnetic steel 301 are the same, forming two repulsive magnetic springs. Two coils 302 are shown in the figure. After the coil 302 is passed through the alternating current, it is affected by the magnetic field of the plurality of main magnetic steels 201 to generate an alternating Lorentz magnetic force. The coil 302 is fixed as a stator, and the main magnetic steel 201 is subjected to equal and opposite forces to drive the entire vibration component 2 to reciprocate in the sleeve 5. The vibration is transmitted from the vibration component 2 to the stator component 3 through the magnetic spring. The stator component 3 is relatively fixed to the housing 1. The housing 1 is generally fixedly connected to the terminal product. When a person touches the terminal product, the vibration feedback can be experienced.
[0004] This type of magnetic spring motor focuses mainly on wide-band response, and has a significant effect in increasing electromagnetic energy within a limited volume. Although the frequency band is wide, the vibration sensation near the resonance frequency is relatively small. This is mainly because the vibration component of the existing structure only has a magnetic structure, which easily leads to a small mass of the vibration component and a low vibration momentum near the resonance frequency, thereby requiring a higher energy supply at the resonance point. Most scene signals of tactile feedback in many terminals mainly use frequencies near the resonance point. As the terminal has higher and higher requirements for energy saving, this leads to the terminal products in application scenarios near the resonance frequency requiring higher power consumption to obtain a larger vibration momentum.
[0005] Therefore, it is necessary to improve the prior art to overcome the above defects in the prior art. Utility Model Content
[0006] The utility model aims to provide a linear vibration motor, which can improve the vibration momentum near the resonance frequency of the linear vibration motor on the basis of ensuring a wide-frequency response.
[0007] In order to achieve the above utility model object, the utility model proposes a linear vibration motor, including a housing, including an inner cavity;
[0008] a vibration component, disposed in the inner cavity and capable of linear movement in the inner cavity, the vibration component comprising a magnetic steel structure and a counterweight connected to the magnetic steel structure; and
[0009] The stator assembly is fixed relative to the shell, and includes a coil for driving the vibration assembly to vibrate and two end magnets spaced apart along the vibration direction of the vibration assembly. The two end magnets are respectively arranged opposite to the two ends of the vibration assembly, and the end of the vibration assembly and the adjacent end magnets are arranged opposite to each other with the same poles, forming a magnetic spring between the two.
[0010] Furthermore, the counterweight is sleeved on the outside of the magnetic steel structure.
[0011] Furthermore, both ends of the magnetic steel structure are connected to a counterweight, the counterweight includes a first cavity, and the end of the magnetic steel structure is arranged in the first cavity of the corresponding counterweight.
[0012] Furthermore, the magnetic steel structure and the end magnetic steel are arranged opposite to each other with the same pole, and a magnetic spring is formed between the two.
[0013] Furthermore, the vibration component also includes a side magnetic steel connected to the counterweight, and the side magnetic steel and the end magnetic steel are arranged opposite to each other with the same pole, forming a magnetic spring therebetween.
[0014] Furthermore, the counterweight also includes a second cavity and a partition separating the first cavity and the second cavity, and the edge magnetic steel is arranged in the second cavity of the counterweight connected thereto.
[0015] Furthermore, the magnetic steel structure includes at least two main magnetic steels and a pole core connected between two adjacent main magnetic steels, the magnetic poles of the main magnetic steels are arranged at intervals along the vibration direction of the vibration component, and the same poles of two adjacent main magnetic steels are arranged opposite to each other; the coil is wrapped around the outside of the pole core.
[0016] Furthermore, the density of the counterweight is greater than the density of the main magnetic steel.
[0017] Further, the main magnetic steel and the pole core are independent components, and the magnetic steel structure is formed by connecting the main magnetic steel and the pole core; or,
[0018] The magnetic steel structure is an integrally formed part, and the main magnetic steel and the pole core are part of the part.
[0019] Furthermore, the outer shell includes a tubular casing and end covers sealing openings at both ends of the casing, and the casing and the end covers are connected to form the inner cavity;
[0020] The two end magnetic steels are respectively connected to the two end covers;
[0021] The coil is connected to the inner surface of the housing.
[0022] Furthermore, the linear vibration motor also includes a sleeve;
[0023] The sleeve is sleeved on the outer periphery of the magnetic steel structure and fixedly connected to the housing, the magnetic steel structure and the sleeve are slidably matched, and / or the counterweight is slidably matched with the housing;
[0024] Furthermore, the linear vibration motor also includes a sleeve sleeved on the outside of the magnetic steel structure, the sleeve is fixedly connected to the magnetic steel structure and slidably matched with the housing.
[0025] Compared with the prior art, the utility model has the following beneficial effects: the linear vibration motor provided by the utility model is provided with a counterweight, and the mass of the vibration component is increased by the counterweight, thereby increasing the vibration momentum of the vibration component. When the vibration momentum is transmitted to the stator component through the magnetic spring, people can feel a greater vibration sensation. On the basis of ensuring a wide-band response, the vibration momentum near the resonance frequency of the linear vibration motor can be increased. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 is a cross-sectional view of a linear vibration motor in the prior art;
[0027] Figure 2 This is a schematic diagram of the appearance structure of the linear vibration motor in the utility model;
[0028] Figure 3 is a cross-sectional view of the first embodiment of the linear vibration motor in the utility model;
[0029] Figure 4 yes Figure 3 A cross-sectional view showing a counterweight in a linear vibration motor;
[0030] Figure 5 is a cross-sectional view of the second embodiment of the linear vibration motor in the utility model;
[0031] Figure 6 yes Figure 5 A cross-sectional view showing a counterweight in a linear vibration motor;
[0032] Figure 7 is a cross-sectional view of the third embodiment of the linear vibration motor in the utility model;
[0033] Figure 8 yes Figure 7 A cross-sectional view showing a counterweight of a linear vibration motor;
[0034] Fig. 9 It is a structural schematic diagram of the magnetic steel structure of the linear vibration motor in the utility model;
[0035] Fig.10 This is another structural schematic diagram of the magnetic steel structure of the linear vibration motor in the utility model;
[0036] Fig.11 It is a comparison diagram of the vibration momentum frequency response of the linear vibration motor in the utility model and the linear motor in the prior art;
[0037] Fig.12 is a cross-sectional view of a fourth embodiment of the linear vibration motor of the utility model;
[0038] Fig.13 is a cross-sectional view of a fifth embodiment of the linear vibration motor of the present utility model;
[0039] Fig.14 It is a cross-sectional view of the sixth embodiment of the linear vibration motor in the utility model. DETAILED DESCRIPTION
[0040] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is understandable that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.
[0041] The terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.
[0042] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0043] like Figures 2 to 3 As shown, the present application proposes a linear vibration motor, including a housing 1 , a vibration component 2 and a stator component 3 .
[0044] The housing 1 includes an inner cavity 101 .
[0045] The vibration assembly 2 is disposed in the inner cavity 101 and can move linearly in the inner cavity 101. The vibration assembly 2 includes a magnetic steel structure 200 and a counterweight 4 connected to the magnetic steel structure 200. Optionally, the magnetic steel structure 200 can be composed of multiple parts or a single integrally formed part.
[0046] The stator assembly 3 is relatively fixed to the housing 1, and includes a coil 302 for driving the vibration assembly 2 to vibrate and two end magnets 301 spaced apart along the vibration direction A of the vibration assembly 2. The two end magnets 301 are respectively arranged opposite to the two ends of the vibration assembly 2, and the end of the vibration assembly 2 and the adjacent end magnets 301 are arranged opposite to each other with the same poles, forming a magnetic spring between the two.
[0047] After the coil 302 is energized with alternating current, it is acted upon by the magnetic field of the magnetic steel structure 200 to generate an alternating Lorentz magnetic force. The coil is fixed as a stator, and the magnetic steel structure 200 is acted upon by forces of equal magnitude and opposite directions to drive the entire vibration assembly 2 to reciprocate and vibrate, thereby having a good broadband response. On the basis of ensuring broadband response, the mass of the vibration assembly 2 is increased by the counterweight 4, thereby increasing the vibration momentum of the vibration assembly 2. When the vibration momentum is transmitted to the stator assembly 3 through the magnetic spring, a greater vibration sensation is felt by the user, thereby increasing the vibration momentum near the resonance frequency of the linear vibration motor.
[0048] In some embodiments, Figure 5 and Figure 6 As shown, the counterweight 4 is annular and is sleeved outside the magnetic steel structure 200. At this time, the magnetic steel structure 200 is directly opposite to the end magnetic steel 301. In other embodiments, such as Figure 3 and Figure 7 As shown, the counterweight 4 is connected to the end of the vibration assembly 2, and the end magnet 301 and the magnet structure 200 are separated.
[0049] In some possible embodiments, such as Figure 7 and Figure 8 As shown, both ends of the magnetic steel structure 200 are connected to a counterweight 4, and the counterweight 4 includes a first cavity 401. The end of the magnetic steel structure 200 is arranged in the first cavity 401 of the corresponding counterweight 4. The magnetic steel structure 200 and the end magnetic steel 301 are arranged opposite to each other with the same pole, and a magnetic spring is formed between the two. At this time, the counterweight 4 is made of non-magnetic conductive material to prevent affecting the magnetic repulsion between the magnetic steel structure 200 and the end magnetic steel 301.
[0050] In some other feasible embodiments, Figure 3As shown, the vibration component 200 also includes a side magnetic steel 203 connected to the counterweight 4. The side magnetic steel 203 and the end magnetic steel 301 are arranged opposite to each other with the same pole, and a magnetic spring is formed between the two. Figure 4 It is shown that the counterweight 4 also includes a second cavity 402 and a partition 403 separating the first cavity 401 and the second cavity 402, and the side magnetic steel 203 is arranged in the second cavity 402 of the counterweight 4 connected thereto. It can be understood that the magnetic steel structure 200 is arranged in the cavity of the counterweight 4, on the one hand, to achieve the positioning function, and on the other hand, to increase the connection strength, for example, when connected by gluing, the larger the contact area, the better the bonding effect.
[0051] like Figure 3 , Figure 5 , Figure 7 , Fig. 9 , Fig.12 , Fig.13 and Fig.14 The magnetic steel structure 200 includes at least two main magnetic steels 201 and a pole core 202 connected between two adjacent main magnetic steels 201. The magnetic poles of the main magnetic steels 201 are arranged at intervals along the vibration direction A of the vibration component 2, and the same poles of two adjacent main magnetic steels 201 are arranged opposite to each other; the coil 302 surrounds the outside of the pole core 202. In some embodiments, as Fig. 9 As shown, the main magnetic steel 201 and the pole core 202 are independent parts, and the magnetic steel structure 200 is formed by connecting the main magnetic steel 201 and the pole core 202 by, for example, gluing; in other embodiments, Fig.10 As shown, the magnetic steel structure 200 is an integrally formed part, and the main magnetic steel 201 and the pole core 202 are part of the part. For example, the integral magnetic steel structure 200 is made by a special magnetic steel sintering process, or is magnetized by a magnetizing method disclosed in Chinese patent application number 202111062238.3 to form an integral magnetic steel structure 200.
[0052] like Figure 3 , Figure 5 , Figure 7 , Fig.12 , Fig.13 and Fig.14 The housing 1 includes a tubular housing 102 and end caps 103 that seal the openings at both ends of the housing 102. The housing 102 and the end caps 103 are connected to form an inner cavity 101. The vibration component 2 and the stator component 3 are both arranged in the inner cavity 101. The figure shows that the two end magnets 301 are respectively connected to the two end caps 103; the coil 302 is connected to the inner surface of the housing 102. The counterweight 4 can be a sliding accessory with the housing 102. It can be understood that the outer surface of the counterweight 4 slides on the inner surface of the housing 102 along the vibration direction A.
[0053] Furthermore, in some embodiments, the linear vibration motor further includes a sleeve 5, which is sleeved on the outer periphery of the magnetic steel structure 200 and fixedly connected to the housing 102. Figure 3 , Figure 5 , Figure 7 and Fig.12 As shown, the magnetic steel structure 200 is slidably matched with the sleeve 5, and optionally, the counterweight 4 is slidably matched with the housing 102 at the same time. When the radial distance from the counterweight 4 to the housing 102 is less than the radial distance from the magnetic steel structure 200 to the inner surface of the sleeve 5, the vibration component 2 uses the inner surface of the housing 102 as a slide rail for reciprocating vibration; when the radial distance from the counterweight 4 to the housing 102 is greater than the radial distance from the magnetic steel structure 200 to the inner surface of the sleeve 5, the vibration component 2 uses the inner surface of the sleeve 5 as a slide rail for reciprocating vibration. By means of double sliding matching, the vibration component 2 is restricted from vibrating along a straight line.
[0054] In some embodiments, Fig.13 and Fig.14 As shown, the linear vibration motor further includes a sleeve 5 which is sleeved on the outside of the magnetic steel structure 200 and fixedly connected to the magnetic steel structure 200 , and the sleeve 5 is slidably matched with the housing 102 .
[0055] In some embodiments, the density of the counterweight 4 is greater than the density of the main magnetic steel 201, so as to effectively increase the mass of the vibration component 2. Since the addition of the counterweight 4 will significantly increase the weight M1 of the vibration component 2, the vibration momentum M1*a1 will be increased, where a1 is the acceleration of the vibration component 2; M2 is the mass of the stator component 2 and the housing 1 or the terminal, and a2 is the acceleration of the stator component 2 and the housing 1 or the terminal; according to the principle of conservation of energy, M1*a1=M2*a2, near the resonant frequency, a2 increases with the increase in the mass of the weight M1 of the vibration component 2, thereby greatly increasing the output vibration sense near the resonance under the same power consumption, while the vibration momentum at the higher frequency only decreases slightly, ensuring that the terminal at the resonant frequency in the main application scenario is more energy-efficient within the entire bandwidth. Fig.11 The linear vibration motor with a counterweight 4 and the linear vibration motor without a counterweight (ie Figure 1 A comparison diagram of the vibration frequency response curves of the linear vibration motor with the structure shown in the figure, in which the solid line is the frequency response curve of the linear vibration motor with the counterweight 4, and the dotted line is the frequency response curve of the linear vibration motor without the counterweight. It can be seen from the figure that the linear vibration motor with the counterweight 4 has a higher vibration momentum at the resonant frequency.
[0056] Embodiment 1:
[0057] refer to Figure 3 , a linear vibration motor includes a housing 1, a vibration component 2 and a stator component 3.
[0058] The housing 1 includes a tubular casing 102 and end covers 103 sealing openings at both ends of the casing 102 . The casing 102 and the end covers 103 are connected to form an inner cavity 101 .
[0059] The vibration component 2 is disposed in the inner cavity 101 and can move linearly in the inner cavity 101 . The vibration component 2 includes a magnetic steel structure 200 and a counterweight 4 connected to the magnetic steel structure 200 .
[0060] The stator assembly 3 is relatively fixed to the housing 1, and includes a coil 302 for driving the vibration assembly 2 to vibrate and two end magnets 301 spaced apart along the vibration direction of the vibration assembly 2. The coil 302 is connected to the inner surface of the housing 102. The two end magnets 301 are respectively arranged opposite to the two ends of the vibration assembly 2 and are respectively connected to the two end covers 103. The end of the vibration assembly 2 and the adjacent end magnet 301 are arranged opposite to each other with the same poles, and a magnetic spring is formed between the two.
[0061] like Figure 3 and Fig. 9 As shown, the magnetic steel structure 200 includes two main magnetic steels 201 and a pole core 202 connected between two adjacent main magnetic steels 201. The magnetic poles of the main magnetic steels 201 are arranged at intervals along the vibration direction A of the vibration component 2, and the same poles of two adjacent main magnetic steels 201 are arranged opposite to each other; the coil 302 surrounds the outside of the pole core 202.
[0062] Furthermore, the linear vibration motor also includes two sleeves 5 spaced apart along the vibration direction. The two sleeves 5 are sleeved on the outer periphery of the magnetic steel structure 200 and located between the coil 302 and the counterweight 4. The sleeve 5 is also fixedly connected to the housing 102, and the magnetic steel structure 200 is slidably matched with the sleeve 5.
[0063] In the above, the counterweight 4 is connected to the end of the vibration assembly 2. A counterweight 4 is connected to both ends of the magnetic steel structure 200. Figure 4 As shown, the counterweight 4 includes a first cavity 401, a second cavity 402, and a partition 403 separating the first cavity 401 and the second cavity 402. The end of the magnetic steel structure 200 is arranged in the first cavity 401 of the counterweight 4 corresponding thereto. The vibration assembly 200 also includes a side magnetic steel 203 connected to the counterweight 4. The side magnetic steel 203 is arranged in the second cavity 402 of the counterweight 4 connected thereto. The side magnetic steel 203 and the end magnetic steel 301 are arranged opposite to each other with the same polarity, and a magnetic spring is formed between the two. The opposite surfaces of the side magnetic steel 203 and the adjacent main magnetic steel 201 have opposite polarities (i.e., opposite polarities are arranged opposite to each other), and an attraction force is generated between the two, so as to facilitate a more firm connection between the side magnetic steel 203, the counterweight 4 and the main magnetic steel 201.
[0064] The density of the counterweight 4 is greater than the density of the main magnetic steel 201, so as to effectively increase the mass of the vibration component 2. The material of the counterweight 4 can be, for example, tungsten-nickel-iron alloy, tungsten-nickel-copper alloy, tungsten-nickel alloy, tungsten-copper alloy, tungsten-iron alloy and other tungsten-containing alloys, or copper, nickel-copper alloy, SUS304, SUS301, SUS316 and other austenitic stainless steels. On the basis of ensuring a wide-band response, the mass of the vibration component 2 is increased by the counterweight 4, thereby increasing the vibration momentum of the vibration component 2. When the vibration momentum is transmitted to the stator component 3 and the housing 1 through the magnetic spring, people can feel a greater vibration, which can increase the vibration momentum near the resonance frequency of the linear vibration motor.
[0065] Embodiment 2:
[0066] refer to Figure 5 , a linear vibration motor, based on the first embodiment, except that:
[0067] like Figure 6 As shown, the counterweight 4 is annular, and two counterweights 4 are sleeved on the outside of the magnetic steel structure 200 and fixedly connected to the magnetic steel structure 200, so that the magnetic steel structure 200 can be directly opposite to the end magnetic steel 301, and the magnetic steel structure 200 and the end magnetic steel 301 are arranged opposite to each other with the same poles, forming a magnetic spring between the two.
[0068] Figure 5 In the illustrated embodiment, the end surface 404 of the counterweight 4 is flush with the end surface 204 of the magnetic steel structure 200 . It is understandable that, in the vibration direction A, the end surface 404 of the counterweight 4 may also protrude or recess into the end surface 204 of the magnetic steel structure 200 .
[0069] Embodiment three:
[0070] refer to Figure 7 , a linear vibration motor, based on the first embodiment, except that:
[0071] like Figure 8 As shown, the counterweights 4 at both ends of the magnetic steel structure 200 only include the first cavity 401, and the end 204 of the magnetic steel structure 200 is disposed in the first cavity 401 of the corresponding counterweight 4. The magnetic steel structure 200 and the end magnetic steel 301 are disposed opposite to each other with the same poles, and a magnetic spring is formed between the two.
[0072] The counterweight 4 is made of non-magnetic material, for example, it can be made of tungsten-containing alloys such as tungsten-nickel-iron alloy, tungsten-nickel-copper alloy, tungsten-nickel alloy, tungsten-copper alloy, tungsten-iron alloy, etc., or it can be made of other austenitic stainless steel materials such as copper, nickel-copper alloy, SUS304, SUS301, SUS316, etc.
[0073] Embodiment 4:
[0074] refer to Fig.12 , a linear vibration motor, based on the first embodiment, except that:
[0075] In this embodiment, the magnetic steel structure 200 includes three main magnetic steels 201 and two pole cores 202, and the pole cores 202 are respectively connected between two adjacent main magnetic steels 201; the stator assembly includes two coils 302, and a coil 302 is correspondingly surrounded by the outside of each pole core 202.
[0076] Embodiment five:
[0077] refer to Fig.13 , a linear vibration motor, based on the first embodiment, except that:
[0078] The sleeve 5 is sleeved on the outside of the magnetic steel structure 200 and fixedly connected thereto, and the sleeve 5 is slidably matched with the housing 102. It can be understood that the gluing and fixing method of the sleeve 5 and the housing 102 is changed to the gluing and fixing of the sleeve 5 and the vibration component 2, so that the sleeve 5 becomes a part of the vibration component 2.
[0079] Embodiment six:
[0080] refer to Fig.14 , a linear vibration motor, based on the first embodiment, except that:
[0081] The two sleeves 5 are respectively fixedly connected to the two ends of the counterweight 4, and the sleeves 5 are slidably matched with the casing 102. It can be understood that the gluing and fixing method of the sleeves 5 and the casing 102 is changed to the gluing and fixing of the sleeves 5 and the vibration component 2, so that the sleeves 5 become a part of the vibration component 2.
[0082] It is understandable that in the above embodiment, the magnetic steel structure 200 can also adopt a multi-level magnetic circuit, that is, the number of pole cores 202 N>=2, and is an integer, the number of main magnetic steels 201 is N+1, and the number of coils 302 is equal to the number of pole cores 202. Two adjacent main magnetic steels 201 are connected through the pole cores 202, and the opposite surfaces of the two adjacent main magnetic steels 201 have the same polarity. In addition, the magnetic steel structure 200 can also be an integrally formed part.
[0083] The above are only specific implementations of the present invention, and any improvements made based on the concept of the present invention are considered to be within the protection scope of the present invention.
Claims
1. A linear vibration motor, characterized in that: include: a housing, including an inner cavity; a vibration component, disposed in the inner cavity and capable of linear movement in the inner cavity, the vibration component comprising a magnetic steel structure and a counterweight connected to the magnetic steel structure; as well as, The stator assembly is fixed relative to the shell, and includes a coil for driving the vibration assembly to vibrate and two end magnets spaced apart along the vibration direction of the vibration assembly. The two end magnets are respectively arranged opposite to the two ends of the vibration assembly, and the end of the vibration assembly and the adjacent end magnets are arranged opposite to each other with the same poles, forming a magnetic spring between the two.
2. The linear vibration motor according to claim 1, characterized in that: The counterweight is sleeved on the outside of the magnetic steel structure.
3. The linear vibration motor according to claim 2, characterized in that: Both ends of the magnetic steel structure are connected to a counterweight, and the counterweight includes a first cavity. The end of the magnetic steel structure is arranged in the first cavity of the corresponding counterweight.
4. The linear vibration motor according to claim 3, characterized in that: The magnetic steel structure and the end magnetic steel are arranged opposite to each other with the same pole, and a magnetic spring is formed between the two.
5. The linear vibration motor according to claim 3, characterized in that: The vibration component also includes a side magnetic steel connected to the counterweight, and the side magnetic steel and the end magnetic steel are arranged opposite to each other with the same pole, forming a magnetic spring between the two.
6. The linear vibration motor according to claim 5, characterized in that: The counterweight also includes a second cavity and a partition separating the first cavity and the second cavity, and the edge magnetic steel is arranged in the second cavity of the counterweight connected thereto.
7. The linear vibration motor according to any one of claims 1 to 6, characterized in that: The magnetic steel structure includes at least two main magnetic steels and a pole core connected between two adjacent main magnetic steels. The magnetic poles of the main magnetic steels are arranged at intervals along the vibration direction of the vibration component, and the same poles of two adjacent main magnetic steels are arranged opposite to each other. The coil surrounds the outside of the pole core.
8. The linear vibration motor according to claim 7, characterized in that: The density of the counterweight is greater than the density of the main magnetic steel.
9. The linear vibration motor according to claim 7, characterized in that: The main magnetic steel and the pole core are independent components, and the magnetic steel structure is formed by connecting the main magnetic steel and the pole core; or, The magnetic steel structure is an integrally formed part, and the main magnetic steel and the pole core are part of the part.
10. The linear vibration motor according to any one of claims 1 to 6, characterized in that: The outer shell includes a tubular casing and end covers that seal the openings at both ends of the casing, and the casing and the end covers are connected to form the inner cavity; The two end magnetic steels are respectively connected to the two end covers; The coil is connected to the inner surface of the housing.
11. The linear vibration motor according to claim 10, characterized in that: The linear vibration motor also includes a sleeve; The sleeve is sleeved on the outer periphery of the magnetic steel structure and fixedly connected to the casing. The magnetic steel structure is slidably matched with the sleeve, and / or the counterweight is slidably matched with the casing.
12. The linear vibration motor according to claim 10, wherein: The linear vibration motor also includes a sleeve sleeved outside the magnetic steel structure, the sleeve is fixedly connected to the magnetic steel structure and slidably matched with the housing.