WO2019029048A1

WO2019029048A1 - Linear vibration motor

Info

Publication number: WO2019029048A1
Application number: PCT/CN2017/112165
Authority: WO
Inventors: 张新众; 毛东升
Original assignee: 歌尔股份有限公司
Priority date: 2017-08-11
Filing date: 2017-11-21
Publication date: 2019-02-14
Also published as: CN107257190B; CN107257190A

Abstract

A linear vibration motor, comprising: a stator assembly, the stator assembly comprising a housing (1) having an accommodation cavity, and a magnet (2) that is disposed in the accommodation cavity and that is fixedly combined with the housing (1), the magnet (2) comprising a hollow portion (21); a vibration assembly, the vibration assembly comprising a coil (3) provided on a magnetically-conductive plate (6), as well as a mass block (4) surrounding the periphery of the coil (3), wherein because the hollow portion (21) extends along the vibrating direction of the vibration assembly, when the vibration assembly vibrates, the coil (3) vibrates along with the vibration assembly and moves into the hollow portion (21) of the magnet (2); an elastic support member (5) configured to keep the vibration assembly suspended in the accommodation cavity of the housing (1); the magnetically-conductive plate (6) further comprises a raised portion (61) formed by an upward turn of the body of the magnetically-conductive plate (6), the raised portion (61) extending into the coil (3). The described linear vibration motor structure maximizes the utilization of the magnetism of the magnet, increases the efficiency of the coil in respect of the magnetic lines of force of the magnet, and increases the electromagnetic driving force of the motor. The simplicity and high degree of precision with which the motor may be assembled improves the vibration performance thereof.

Description

Linear vibration motor

Technical field

The invention belongs to the technical field of electronic products. More specifically, it relates to a linear vibration motor.

Background technique

With the development of communication technologies, portable electronic devices, such as mobile phones, tablet computers, smart wearable devices, multimedia entertainment devices, etc., have become a necessity for people. In these electronic devices, a miniature linear vibration motor is usually used for feedback of the system, such as clicking the vibration feedback of the touch screen.

A linear vibration motor is a component that converts electrical energy into mechanical vibration using the principle of electromagnetic force. A conventional linear vibration motor is usually installed in a mobile communication terminal, a portable terminal or the like, which is usually installed at an edge portion of the device, and receives vibrations. The object produces vibration in a vertical direction.

Existing linear vibration motors typically include a housing having a receiving chamber in which is disposed a stator assembly, a vibrator assembly, and an elastomeric support configured to suspend the vibrator assembly within the receiving chamber. The stator assembly may be a magnet or a coil fixedly coupled to the housing, and the corresponding vibration assembly may be a coil or magnet that is supported by the elastic support for up and down vibration. The existing magnets as the stator assembly or the vibrator assembly are all cylindrical solid core structures, and the coil is surrounded by the periphery of the magnet. After the coil is energized, the coil is subjected to the ampere force to generate electromagnetic force and between the magnetic field generated by the magnet. The interaction, in turn, causes the vibrator assembly to move up and down, which in turn results in vibration of the entire linear vibration motor.

However, the existing linear vibration motor has the following drawbacks: 1. The magnetic flux utilization efficiency of the magnet is low, which affects the overall tactile sensation. 2. The existing motor assembly process is complicated, especially when the coil and the mass are assembled as vibration components, the external positioning tool needs to be used to ensure coaxial assembly, the assembly steps are cumbersome, and it is difficult to control the assembly precision. 3. The existing linear vibration motor is only suitable for vibration experience under single frequency point, and does not meet the requirements of haptic feedback application for multi-frequency point vibration.

Therefore, there is a need to provide a new type of linear vibration motor to solve the drawbacks of the prior art.

Summary of the invention

In view of the above problems, the technical problem to be solved by the present invention is to provide a linear vibration motor which can maximize the magnetic properties of the magnet, improve the utilization efficiency of the coil for the magnetic field lines of the magnet, improve the electromagnetic driving force of the motor, and the assembly process. Simple and accurate assembly, making the motor available Better vibration performance.

In order to solve the above technical problems, the present invention adopts the following technical solutions:

A linear vibration motor, the motor comprising:

a stator assembly, the stator assembly including a housing having a receiving cavity, a magnet disposed within the receiving cavity and coupled to the housing, the magnet including a hollow portion;

a vibrator assembly including a coil disposed on a magnetically permeable plate and a mass surrounding the periphery of the coil; the hollow portion extending in a vibration direction of the vibrator assembly, the coil accompanying the vibrator when the vibrator assembly vibrates The assembly vibrates and is inserted into the hollow portion of the magnet;

An elastic support member configured to suspend the vibrator assembly in a receiving cavity of the housing;

The magnetic conductive plate further includes a convex portion formed by integrally bending the magnetic conductive plate body, and the convex portion is inserted into the coil.

Further, preferably, the convex portion includes a side wall, a top wall at a top end of the side wall, and an opening at a bottom end of the convex portion; the side wall and the top wall collectively surrounding to form the The lumen of the raised portion.

Further, preferably, the vibrator assembly further includes a yoke that is coupled to the upper surface of the top wall of the boss and extends above the coil.

Further, preferably, the yoke includes a body portion disposed in a direction perpendicular to a vibration direction of the vibrator assembly, and an outer diameter of the body portion is larger than an inner diameter of the coil.

Further, preferably, the yoke further includes a welding groove formed inwardly from the top surface of the top portion of the body portion corresponding to the top wall of the boss portion.

Further, preferably, the yoke further includes an upper end portion extending outward from a top surface of the body portion in a vibration direction of the vibrator assembly.

Further, preferably, the vibrator assembly further includes a center core inserted and coupled in the inner cavity of the boss.

Further, it is preferable that a vibration space for vibrating the vibrator assembly is provided between the top upper surface of the yoke and the inner side surface of the top wall of the housing.

In addition, it is preferable that the coil and the mass are fixedly fixed on an upper surface of the magnetic conductive plate, and a gap for inserting a magnet is formed between the coil and the mass; the elastic support is fixedly fixed in the same Between the lower surface of the magnetically permeable plate and the inner side surface of the bottom wall of the housing, and configured to suspend the vibrator assembly within the receiving cavity of the housing.

Further, preferably, the linear vibration motor further includes enabling the coil to be connected to an external device Electrically connecting the printed circuit board; the printed circuit board includes: a fixing portion fixed to the magnetic conductive plate and electrically connected to the coil; and a connection outside the housing for electrically connecting with the external device And a flexible connecting portion that connects the fixing portion and the connecting portion into a unitary structure.

The beneficial effects of the present invention are as follows:

1. The linear vibration motor provided by the invention can maximize the magnetic property of the magnet by improving the structure of the magnet and the arrangement of the coil, and improve the utilization efficiency of the magnetic line of the magnet for the magnet, and improve the electromagnetic driving force and driving force of the motor. The increase of the effective frequency of the motor increases the application of the dual-frequency or multi-frequency resonant frequency, satisfies the requirements of the vibration provided by the motor under the multi-frequency point, and improves the tactile experience of the motor.

2. The linear vibration motor structure provided by the invention reduces the difficulty of the motor manufacturing process and improves the overall assembly efficiency. In particular, the coil and the mass block fixed on the magnetic conductive plate in the motor are used as the vibrator assembly of the motor. Since the magnetic conductive plate can be integrally formed by machining, the precision thereof is easy to control, and the structure of the convex portion of the magnetic conductive plate can be improved. The overall assembly accuracy of the vibrator assembly simplifies the assembly process of the vibrator assembly, eliminating the need for external positioning tooling. Moreover, the central magnetic core with better magnetic permeability can be added to the inner cavity of the convex portion of the magnetic conductive plate according to the actual situation, which is more advantageous for further improving the utilization efficiency of the magnetic line of the magnet for the magnet.

3. In the linear vibration motor structure provided by the present invention, the first housing and the second housing are both magnetically conductive, and the central magnetic core is made of a magnetic conductive material, and the magnetic lines of the magnet are closed while the centering action is performed, so that the magnet The magnetic effect is maximized, and the electromagnetic driving force of the motor is easily increased, thereby improving the tactile experience of the motor.

4. The linear vibration motor provided by the invention has a motor vibration balance position, and the vibrator assembly and the stator assembly are mutually attractive, which reduces the micro vibration of the motor without current or weak current, so that the motor can quickly return to a stationary state.

5. The linear vibration motor structure provided by the invention has large electromagnetic driving force and shortens the motor vibration rising time; the static balance magnetic force of the motor balance position is large, and the motor vibration falling time is shortened; the overall motor response speed is improved.

DRAWINGS

The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Fig. 1 is a cross-sectional view showing the structure of a linear vibration motor according to a first embodiment of the present invention.

2 is a schematic view showing the arrangement of a vibrator assembly and a magnet in a linear vibration motor according to a first embodiment of the present invention.

3 shows a vibrator assembly and a magnet in a linear vibration motor according to a second embodiment of the present invention. Configuration structure diagram.

4 is a schematic view showing the arrangement of a vibrator assembly and a magnet in a linear vibration motor according to a third embodiment of the present invention.

Fig. 5 is a view showing the arrangement of a vibrator assembly and a magnet in a linear vibration motor according to a fourth embodiment of the present invention.

Fig. 6 is a view showing the arrangement of a vibrator assembly and a magnet in a linear vibration motor according to a fifth embodiment of the present invention.

Fig. 7 is a view showing the arrangement of a vibrator assembly and a magnet in a linear vibration motor according to a sixth embodiment of the present invention.

Fig. 8 is a view showing the arrangement of a vibrator assembly and a magnet in a linear vibration motor according to a seventh embodiment of the present invention.

Fig. 9 is a view showing the arrangement of a vibrator assembly and a magnet in a linear vibration motor according to an eighth embodiment of the present invention.

Detailed ways

In the following description, for the purposes of illustration However, it is apparent that these embodiments may be practiced without these specific details. In other instances, well known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

The "mass" used in the description of the following detailed description may also be referred to as "weights", both of which refer to one of the components that cooperate with the magnet or coil to vibrate within the motor housing as a vibrator assembly. Further, the present invention is mainly used for the improvement of the linear vibration motor used in the description, and may also be referred to as a Y-direction vibration motor. However, for convenience of description, in the following description of the embodiments, a linear vibration motor will be specifically described as an example.

In order to explain the present invention more clearly, the present invention will be further described in conjunction with the preferred embodiments and the accompanying drawings. It should be noted that, for ease of understanding, the descriptions of the "upper surface", "lower surface", "bottom", "top" and the like referred to in the present invention are merely illustrative of the styles provided with reference to the drawings, which are not used. To the extent that it is understood by those skilled in the art, when the position of the motor is changed in the present invention, the corresponding description and terminology referred to herein should be based on its actual effect in the motor.

The invention provides a linear vibration motor with a novel structure. Firstly, the vibration motor improves the structure of the magnet and the arrangement of the coil, and effectively solves the problem that the magnetic line utilization efficiency of the current magnet is low, and the existing linear vibration motor is only applicable. The vibration experience at a single frequency point does not satisfy the requirements for haptic feedback applications for multi-frequency point vibration. Secondly, the linear vibration motor junction provided by the present invention The structure is also specially improved for the structure of the vibrator assembly in the motor, which reduces the difficulty of the motor manufacturing process and improves the overall assembly efficiency.

Specifically, referring to FIGS. 1 and 2, a linear vibration motor includes: a stator assembly, a vibrator assembly, and an elastic support member 5; wherein the stator assembly includes a housing 1 having a receiving cavity, A magnet 2 is housed in the chamber and fixed in combination with the housing 1, and the magnet 2 includes a hollow portion 21 that extends in the vibration direction of the vibrator assembly. In the illustrated embodiment, the housing 1 of the present invention includes a first housing 11 having an opening at the bottom, and a second housing 12 coupled to the opening; the first housing 11 and the second housing 12 A housing 1 having a receiving chamber is formed. In addition, the magnet 2 in the present invention may be a segmented or continuous annular structure, which is not limited in the present invention.

The vibrator assembly includes a coil 3 disposed on the magnetic conductive plate 6 and a mass 4 disposed around the periphery of the coil 3 and coaxial with the coil. When the vibrator assembly vibrates, the coil 3 vibrates and inserts with the vibrator assembly The hollow portion 21 of the magnet 2; in the illustrated structure, the coil 3 and the mass 4 are fixedly coupled to the upper surface of the magnetic conductive plate 6, and a magnet 2 is formed between the coil 3 and the mass 4. The inserted gap 7; and the magnetic conductive plate 6 of the present invention further includes a convex portion 61 which is integrally bent by the plate body of the magnetic conductive plate 6, and the convex portion 61 is inserted into the coil 3. Preferably, the convex portion 61 includes a side wall 611, a top wall 612 at the top end of the side wall 611, and an opening 613 at the bottom end of the convex portion 61; the side wall 611 and the top wall 612 are surrounded by The inner cavity 614 of the raised portion 61 is formed. In the present invention, the vibrator assembly is mainly composed of a coil 3 and a mass 4 fixed on the magnetic conductive plate 6, and since the convex portion 61 of the magnetic conductive plate 6 can be integrally formed by bending of the magnetic conductive plate 6, the position thereof is located. The precision is easy to control, and the structure of the boss portion 61 on the magnetic conductive plate 6 of the present invention is utilized. During the assembly of the vibrator assembly, the coil 3 can be directly sleeved on the boss portion 61 and fixed between the two. The fixing strength is high, and the overall coaxial assembly precision between the coil 3 and the magnetic conductive plate 6 in the vibrator assembly is improved, the subsequent assembly of the mass 4 is facilitated, the polarization of the vibrator assembly during the vibration process is avoided, and the vibrator is simplified. The assembly process of the components eliminates the need for external positioning tools. Further, the convex portion 61 on the magnetic conductive plate 6 can also guide the magnetic lines of force of the magnet 2 having an annular structure to increase the magnetic field strength at the position where the coil 3 is located, and increase the electromagnetic driving force of the motor.

Corresponding to the magnetic conductive plate 6, the elastic support member 5 of the present invention is fixedly fixed between the lower surface of the magnetic conductive plate 6 and the inner side surface of the second casing 12, and is configured to suspend the vibrator assembly In the housing cavity of the housing 1. It should be noted that, in the present invention, both the first housing 11 and the second housing 12 can be made of a material having magnetic permeability, so that the magnetic lines of force of the magnet can be closed, and the magnetic action of the magnet 2 can be maximized to enhance the motor. Electromagnetic driving force. As a specific embodiment of the present invention, the housing 1 shown in FIG. 1 has a circular structure, and it is obvious that the housing may also be non-circular. The structure of the cross section may be, for example, a rectangular parallelepiped shape, a rounded rectangular parallelepiped shape, or the like.

Further, the linear vibration motor of the present embodiment further includes a circuit 3 for electrically connecting the coil 3 to an external device; the printed circuit board 8 includes: a lower surface of the magnetic conductive plate 6 And a fixing portion 81 electrically connected to the coil 3; a connecting portion 82 located outside the casing 1 and fixedly coupled to the upper surface of the second casing 12 for electrically connecting with an external device; The fixing portion 81 and the connecting portion 82 are connected to a flexible connecting portion 83 of a unitary structure. The flexible connecting portion 83 is located below the elastic arm of the elastic support member 5. When the vibrator assembly is vibrated, when the elastic arm is pressed or deformed, the flexible connecting portion 83 moves up and down, thereby avoiding the flexible connecting portion 83 and the elastic portion. Collisions between the arms affect the vibration performance of the vibration motor. When the elastic arm is deformed to the extreme position by pressure, the limit of the damping member provided on the upper surface of the second casing can be prevented to prevent the elastic arm from being pressed to the flexible connecting portion to damage the flexible connecting portion. It will be understood by those skilled in the art that the mass and/or the magnetic conductive plate in the motor should be provided with wire vias connecting the coil and the printed circuit board to enable the coil to be electrically connected to the external device, but for the via hole. The specific position and structural form of the present invention are not limited herein.

In the present invention, the magnet 2 having an annular structure fixed in combination with the inner surface of the top wall of the first casing 11 is used as a stator assembly, and the coil 3 is inserted as a part of the vibrator assembly into the hollow portion 21 of the magnet 2 with the vibrator assembly. The magnet 2 as a stator having a ring structure and its arrangement with the coil 3 as a vibrator are compared with the columnar solid core magnet used in the conventional vibration motor, due to the magnetic field lines of the existing cylindrical solid magnet. The radiation is dispersed outward from the central axis, and the magnetic lines of the ring-shaped structural magnet of the present invention are concentrated on the central axis, so that the magnetic field strength of the coil disposed on the central axis of the magnet of the annular structure is higher than that of the magnetic field. The coil of the periphery of the cylindrical solid core magnet; and the coil of the present invention is disposed in the inner space of the magnet having the annular structure, and the diameter of the coil can be made smaller, so the effective number of turns of the coil is significantly higher than that of the outer core of the cylindrical solid magnet. The number of effective turns of the large diameter coil.

In addition, in the present invention, the magnetic conductive plate 6 is disposed under the magnet 2, so that the stator assembly including the magnet 2 has a large attraction force to the vibrator assembly, and the attractive force can provide a certain component to the vibrator assembly after the motor is powered off. The vibration resistance, in simple terms, is equivalent to providing a brake to the vibrator assembly, which enables the vibrator assembly in the motor to quickly stop vibrating, ie "shortening the motor vibration drop time". Further, when the inner core 100 is included in the coil 3, the utilization of the magnetic line of the magnet 2 is increased, so that the electromagnetic driving force of the motor is increased, thereby accelerating the starting process of the motor, that is, "shortening the motor vibration rise time" . The linear vibration motor provided by the present invention has an advantage over the prior art in that when the motor is in the vibration balance position, the vibrator assembly and the stator assembly are mutually attractive, and the micro vibration of the motor without current or weak current can be reduced. Allows the motor to quickly return to a standstill. And The linear vibration motor structure provided by the invention has large electromagnetic driving force, can shorten the motor vibration rising time; and the motor static pressure is large in the equilibrium position, the motor vibration falling time can be further shortened, so the invention can improve the motor response as a whole. speed. In summary, the linear vibration motor provided by the present invention can maximize the magnetic properties of the magnet, improve the utilization efficiency of the coil for the magnetic field lines of the magnet, improve the electromagnetic driving force of the motor, and increase the driving force to increase the effective bandwidth of the motor. It is convenient for dual-frequency or multi-frequency resonant frequency applications, and meets the requirements of the vibration of the motor under multi-frequency points, improves the tactile experience of the motor, and improves the overall performance of the linear vibration motor as a whole.

Referring to FIG. 3, for the arrangement configuration of the vibrator assembly and the magnet, FIG. 3 is a schematic view showing the arrangement structure of the vibrator assembly and the magnet in the linear vibration motor according to the second embodiment of the present invention. Wherein, the vibrator assembly further includes a yoke 9 coupled to the upper surface of the top wall 612 of the boss 61 and extending above the coil 3, the yoke 9 including a body portion 91, The body portion 91 is disposed in a direction perpendicular to the vibration direction of the vibrator assembly, and the outer diameter of the body portion 91 is larger than the inner diameter of the coil 3; further, the top upper surface of the yoke 9 and the first housing 11 There is a vibration space between the inner side surfaces of the top wall for vibration of the vibrator assembly. Similar to the structure of the vibrator assembly provided in the first embodiment, in the present embodiment, the yoke 9 can provide a guiding path and a direction for the magnetic field lines of the magnet, and can further increase the effect of the magnetic lines of the magnet 2 having the annular structure on the central axis. The electromagnetic driving force of the motor is increased by increasing the strength of the magnetic field at the position where the coil 3 is located. Further, the circumferential outer edge of the yoke 9 may be located on the inner side, the outer side or the flush side of the circumferential outer edge of the coil 3. In the case where the interference between the circumferential outer edge of the yoke 9 and the magnet 2 is ensured, preferably, the circumferential outer edge of the yoke 9 is located outside the circumferential outer edge of the coil 3, Make it as possible to guide the magnetic lines of force.

In addition, in order to ensure the coaxial and precise assembly between the yoke 9 and the coil 3 under the condition of ensuring relative insulation between the yoke 9 and the coil 3, and simplifying the assembly and fixing difficulty of the yoke 9, it is preferable that A gap is left between the lower surface of the yoke 9 and the top upper surface of the coil 3. The other advantages of this embodiment are the same as those of the prior art provided by the first embodiment, and are not described herein again.

Referring to FIG. 4, with respect to the arrangement structure of the vibrator assembly and the magnet shown in FIG. 3, as a third embodiment of the further improvement, in order to facilitate the fixation of the upper surface of the top wall 612 of the convex portion 61 of the magnetic conductive plate 6 and the convex portion 61, And the fixing strength between the two is increased to improve the stability and reliability of the motor vibrator assembly. The yoke 9 and the upper surface of the top wall 612 of the convex portion 61 of the magnetic conductive plate 6 may be connected by laser welding. Preferably, the yoke 9 further includes a splicing groove 92 formed inwardly from the top surface of the main portion 91 of the yoke 9 corresponding to the top wall 612 of the boss portion 61. The arrangement of the welding groove 92 can reduce the portion of the yoke 9 corresponding to the top wall 612 of the boss 61. It is convenient for laser welding between the two. The other advantages of the third embodiment are the same as those of the prior art provided by any of the above embodiments, and are not described herein again.

Referring to FIG. 5, with respect to the arrangement structure of the vibrator assembly and the magnet shown in FIG. 3, as a fourth embodiment of the further improvement, in the embodiment, the yoke 9 further includes an upper surface along the top surface of the main body portion 91 along the vibrator The upper end portion 93 of the component vibrating outwardly extends, and the body portion 91 and the upper end portion 93 are of unitary structure. Similar to the magnetic yoke structure provided by the second embodiment, in the present embodiment, the upper end portion 93 can be used to provide a guiding path and a direction for the magnetic lines of force, so that the magnetic lines of force are concentrated at the coil to increase the strength of the magnetic field at the position where the coil is located. The diameter of the upper end portion 93 may be selected according to actual needs within a range larger than, smaller than, or equal to the diameter of the convex portion 61. The other advantages of the fourth embodiment are the same as those of the prior art provided by any of the above embodiments, and are not described herein again.

Referring to FIG. 6 , the configuration of the vibrator assembly and the magnet provided by the first embodiment shown in FIG. 1 and FIG. 2 is a fifth embodiment of the present invention. In the embodiment, preferably, the vibrator assembly further includes an insertion. And incorporating the center core 100 fixed in the inner cavity 614 of the boss 61. The central core 100 can be made of a material with better magnetic permeability, which can further increase the magnetic permeability effect inside the coil 3, improve the utilization efficiency of the coil 3 for the magnetic field lines of the magnet, and enhance the electromagnetic driving force of the motor to realize the invention of the present invention. purpose.

Referring to FIG. 7 , for the arrangement structure of the vibrator assembly and the magnet provided in the second embodiment shown in FIG. 3 , as a sixth embodiment of the further improvement, in the embodiment, preferably, the vibrator assembly further includes an insertion and a combination. The center core 100 is fixed in the inner cavity 614 of the boss 61. The function and effect of the center core 100 are the same as those of the center core described in the fifth embodiment, and will not be described again.

In addition, referring to FIG. 8, the arrangement structure of the vibrator assembly and the magnet provided in the third embodiment shown in FIG. 4 is further improved as the seventh embodiment. In this embodiment, it is also preferable that the vibrator assembly is further A central core 100 that is inserted and bonded in the inner cavity 614 of the boss 61 is included.

In addition, referring to FIG. 9, the arrangement structure of the vibrator assembly and the magnet provided in the fourth embodiment shown in FIG. 5 is further improved as the eighth embodiment. In the present embodiment, it is also preferable that the vibrator assembly is further A central core 100 that is inserted and bonded in the inner cavity 614 of the boss 61 is included.

The functions and effects of the center core 100 in the seventh embodiment and the eighth embodiment are the same as those of the center core 100 according to the fifth embodiment or the sixth embodiment, and will not be described again.

In summary, the linear vibration motor structure provided by the present invention can maximize the magnetic properties of the magnet, improve the utilization efficiency of the coil for the magnetic field lines of the magnet, and improve the electromagnetic driving force of the motor. In addition, the present invention is particularly directed to the vibrator assembly of the motor. The structure has been improved, the difficulty of the motor manufacturing process is reduced, the overall assembly efficiency is improved, and the central magnetic core with better magnetic permeability can be added according to the actual situation, which is more conducive to further improving the utilization efficiency of the coil for the magnet magnetic line.

It is apparent that the above-described embodiments of the present invention are merely illustrative of the present invention and are not intended to limit the embodiments of the present invention, and those skilled in the art can also make the above description. It is to be understood that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

A linear vibration motor, characterized in that the motor comprises:

a stator assembly, the stator assembly including a housing having a receiving cavity, a magnet disposed within the receiving cavity and coupled to the housing, the magnet including a hollow portion;

a vibrator assembly including a coil disposed on a magnetically permeable plate and a mass surrounding the periphery of the coil; the hollow portion extending in a vibration direction of the vibrator assembly, the coil accompanying the vibrator when the vibrator assembly vibrates The assembly vibrates and is inserted into the hollow portion of the magnet;

An elastic support member configured to suspend the vibrator assembly in a receiving cavity of the housing;

The magnetic conductive plate further includes a convex portion formed by integrally bending the magnetic conductive plate body, and the convex portion is inserted into the coil.
A linear vibration motor according to claim 1, wherein said convex portion includes a side wall, a top wall at a top end of said side wall, and an opening at a bottom end of said convex portion; said side wall and The top wall collectively surrounds the inner cavity forming the raised portion.
A linear vibration motor according to claim 2, wherein said vibrator assembly further comprises a yoke conjugate fixed to an upper surface of said top wall of said boss and extending above said coil.
The linear vibration motor according to claim 3, wherein the yoke includes a body portion, the body portion is disposed in a direction perpendicular to a vibration direction of the vibrator assembly, and an outer diameter of the body portion is larger than The inner diameter of the coil.
The linear vibration motor according to claim 4, wherein the yoke further comprises a splicing groove formed inwardly from the top surface of the top portion of the body portion corresponding to the top wall of the boss portion.
The linear vibration motor according to claim 4, wherein said yoke further comprises an upper end portion extending outward from a top surface of said body portion in a vibration direction of said vibrator assembly.
A linear vibration motor according to any one of claims 2 to 6, wherein the vibrator assembly further includes a center core inserted and coupled in the inner cavity of the boss.
The linear vibration motor according to claim 3, wherein a vibration space for vibrating the vibrator assembly is provided between the top upper surface of the yoke and the inner side surface of the top wall of the casing.
The linear vibration motor according to claim 1, wherein the coil and the mass are fixedly coupled to an upper surface of the magnetic conductive plate, and a gap for inserting a magnet is formed between the coil and the mass; The elastic support member is fixedly coupled to the lower surface of the magnetic conductive plate and the bottom wall of the housing Between the inner side surfaces and configured to suspend the vibrator assembly within the receiving cavity of the housing.
The linear vibration motor according to claim 1, wherein said linear vibration motor further comprises: enabling a coil to be electrically connected to an external device to a printed circuit board; said printed circuit board comprising: being bonded to said magnetic conductive plate a fixing portion electrically connected to the coil; a connecting portion outside the casing for electrically connecting to the external device; and a flexible connecting portion connecting the fixing portion and the connecting portion to an integral structure.