Positioning assembly, assembly method of vibration motor and vibration motor

Abstract

The invention provides a positioning assembly, an assembling method of a vibration motor and the vibration motor. The assembling method comprises the following steps: positioning a stator assembly formed by an integrated structure of a lower half middle shell, a coil and a coil bracket through a first positioning tool; mutually assembling the positioned lower half middle shell and the stator assembly to form a first semi-finished product assembly; positioning and assembling the first semi-finished product assembly, an oscillator assembly formed by the magnet and the magnetic conductive yoke, and the upper half middle shell through a second positioning tool; mounting gaps between the magnetic conductive yoke and the upper half middle shell and between the magnetic conductive yoke and the lower half middle shell are detected through a monitoring system; according to the detected mounting gaps, the elastic pieces are assembled with the two ends of the magnetic conductive yoke, the upper half middle shell and the lower half middle shell respectively; and the upper shell and the lower shell are respectively assembled with the upper half middle shell and the lower half middle shell to form the vibration motor. By utilizing the vibration motor, the problems of high assembly difficulty, complicated process flow and the like in the assembly process of the existing vibration motor can be solved.

Description

Technical Field

[0001] This invention relates to the field of vibration sound generation technology, and in particular to a positioning component, a method for assembling a vibration motor, and a vibration motor. Background Technology

[0002] In recent years, convenient electronic devices (such as mobile phones, headphones, and computers) have become an integral part of people's daily lives. With the rapid development of technology, people's demands for the sound quality of electronic devices are also increasing, and the full-range and miniaturized characteristics of speakers have become mainstream requirements.

[0003] As electronic products are used in increasingly widespread applications, vibration motors, as a core component of haptic feedback in consumer electronics, also need to meet the demands of more application scenarios. Currently, vibration motors face challenges in assembly, including high assembly difficulty and complex manufacturing processes. Summary of the Invention

[0004] In view of the above problems, the purpose of this invention is to provide a positioning component, a vibration motor, and an assembly method to solve the problems of high assembly difficulty and complex process flow in the assembly of existing vibration motors.

[0005] On one hand, the present invention provides a positioning component, including a first positioning fixture and a second positioning fixture, wherein the first positioning fixture is used to position the stator assembly and the lower half of the middle shell, wherein the stator assembly and the lower half of the middle shell are welded and assembled together to form a first semi-finished component;

[0006] The second positioning fixture is used to position the first semi-finished product assembly, the oscillator assembly, and the upper middle shell.

[0007] One optional embodiment is that the first positioning fixture includes: a first positioning fixture body, a first positioning groove and a first positioning block disposed on the first positioning fixture body, wherein,

[0008] The first positioning groove is arranged around the first positioning block. The first positioning groove is used to position the lower half of the middle shell, and the first positioning block is used to position the stator assembly.

[0009] One optional embodiment is that the second positioning fixture includes: a second positioning fixture body, a second positioning groove and a third positioning groove disposed on the second positioning fixture body, a second positioning block, and a clamping assembly, wherein the second positioning block is disposed around the second positioning groove and the third positioning groove, wherein...

[0010] The second positioning groove is used to position the lower half of the middle shell in the first semi-finished product component;

[0011] The second positioning block is used to position the stator component in the first semi-finished product assembly;

[0012] The third positioning groove is used to position the magnet in the oscillator assembly;

[0013] The clamping assembly is used to position the magnetic yoke in the oscillator assembly.

[0014] One option is that the clamping assembly includes a spring and a clamping block connected to the spring, the spring is connected to the second positioning fixture body, and the clamping block is used to clamp and position the magnetic yoke in the oscillator assembly.

[0015] On the other hand, the present invention also provides a method for assembling a vibration motor, wherein the vibration motor is assembled using the above-mentioned positioning components, the method comprising:

[0016] S1: The stator assembly, which is formed by the integrated structure of the lower middle shell, coil and coil support, is positioned by the first positioning fixture;

[0017] S2: Assemble the positioned lower half of the middle shell with the stator assembly to form the first semi-finished component;

[0018] S3: Position the first semi-finished product assembly, the oscillator assembly formed by the magnet and the magnetic yoke, and the upper shell using the second positioning fixture;

[0019] S4: Assemble the positioned first semi-finished component together with the oscillator component and the upper middle shell;

[0020] S5: The installation gaps between the magnetic yoke and the upper and lower middle shells are detected by the monitoring system; wherein...

[0021] If the detected installation gap is within the preset gap range, the elastic element is assembled with both ends of the magnetic yoke, the upper half of the middle shell, and the lower half of the middle shell respectively.

[0022] If the detected installation gap is not within the preset gap range, the first semi-finished component and the oscillator component will be repositioned and reassembled.

[0023] S6: Assemble the upper shell and lower shell with the upper middle shell and the lower middle shell respectively to form the vibration motor.

[0024] One possible solution is that S4 includes:

[0025] The first semi-finished component after positioning is assembled with the oscillator component to form the second semi-finished component;

[0026] The positioned upper shell is assembled with the second semi-finished component to form the third semi-finished component.

[0027] One optional embodiment is that the elastic element includes a first spring sheet and a second spring sheet, and in S5, it includes:

[0028] If the installation gap between the magnetic yoke and the upper shell is within a preset gap range, then the first spring piece is assembled with one end of the magnetic yoke and the upper shell respectively.

[0029] If the installation gap between the magnetic yoke and the lower half of the middle shell is within the preset gap range, then the second spring piece is assembled with one end of the magnetic yoke and the lower half of the middle shell respectively;

[0030] If the installation gap between the magnetic yoke and the upper shell is not within the preset gap range, the first semi-finished product assembly, the oscillator assembly, and the upper shell are repositioned and reassembled using the second positioning fixture.

[0031] If the installation gap between the magnetic yoke and the lower half of the shell is not within the preset gap range, the first semi-finished product assembly and the oscillator assembly are repositioned and reassembled using the second positioning fixture.

[0032] On the other hand, the present invention also provides a vibration motor, which is assembled using the above-described vibration motor assembly method and includes a housing with a receiving space, an oscillator assembly, a stator assembly and an elastic element.

[0033] The housing includes a middle shell, which comprises an upper middle shell and a lower middle shell arranged along the vibration direction of the oscillator assembly.

[0034] The oscillator assembly includes a magnet and a magnetically conductive yoke with a cavity. The magnet is located in the cavity of the magnetically conductive yoke. An installation gap is provided between the magnetically conductive yoke and the middle shell. The oscillator assembly is suspended in the shell by an elastic element. The elastic element is connected to the upper middle shell and the lower middle shell respectively.

[0035] The stator assembly includes a coil support respectively disposed on the upper half of the middle shell and the lower half of the middle shell, and a coil disposed on the coil support. The stator assembly is fixed inside the shell, and the coil is energized to drive the oscillator assembly to vibrate.

[0036] One option is that the magnetic yoke includes a first magnetic yoke disposed at both ends of the magnet along the vibration direction of the oscillator assembly and a second magnetic yoke disposed on the outer periphery of the magnet. The first magnetic yoke and the second magnetic yoke form the cavity. The magnet and the second magnetic yoke are spaced apart. The coil is located between the magnet and the second magnetic yoke.

[0037] One option is to provide notches on adjacent sides of both the upper and lower shell sections, with the two opposite notches forming an opening.

[0038] The coil support includes a support body and a connecting part. The coil is fixed to the support body. The connecting part is located at the opening of the middle shell and fixed to the inner wall surface of the middle shell. The connecting part is fixed to the middle shell.

[0039] The support body has connecting parts at both opposite ends, and the middle shell has two openings on its circumferential sidewall. The two connecting parts are respectively provided with the two openings.

[0040] One option is that the connecting portion is formed by extending from the edge of the support body along the vibration direction of the oscillator assembly, and the end of the connecting portion away from the support body forms a groove with the opening on the middle shell.

[0041] One option is to further include a circuit board, one end of which is located in the opening and fixed in the groove, one end of which has a pad for soldering to the leads of the coil, and the other end of which is electrically connected to an external circuit.

[0042] As can be seen from the above technical solution, the positioning component, vibration motor assembly method, and vibration motor provided by this invention divide the middle shell into an upper middle shell and a lower middle shell. The lower middle shell and stator assembly are positioned and assembled together using a first positioning fixture. The first semi-finished product assembly, oscillator assembly, and upper middle shell are positioned and assembled using a second positioning fixture. A monitoring system detects the installation gaps between the magnetic yoke in the oscillator assembly and the upper and lower middle shells, respectively. If the detected installation gaps are within a preset gap range, the elastic elements are assembled with both ends of the magnetic yoke, the upper middle shell, and the lower middle shell, respectively. If the detected installation gaps are not within the preset gap range, the first semi-finished product assembly and the oscillator assembly are repositioned and reassembled. This assembly method used in this invention ensures that the magnet, magnetic yoke, coil, and the central axis of the middle shell coincide, guaranteeing assembly accuracy while simplifying the assembly process and improving assembly efficiency.

[0043] To achieve the foregoing and related objectives, one or more aspects of the invention include the features that will be described in detail below. The following description and accompanying drawings illustrate certain exemplary aspects of the invention. However, these aspects indicate only a few of the various ways in which the principles of the invention can be used. Furthermore, the invention is intended to encompass all such aspects and their equivalents. Attached Figure Description

[0044] Other objects and results of the invention will become more apparent and readily understood with reference to the following description taken in conjunction with the accompanying drawings. In the drawings:

[0045] Figure 1 This is a schematic diagram of the first positioning tooling structure according to an embodiment of the present invention;

[0046] Figure 2 This is a schematic diagram of the first positioning tooling positioning stator assembly and the lower half of the middle shell according to an embodiment of the present invention;

[0047] Figure 3 This is a schematic diagram of the second positioning tooling structure according to an embodiment of the present invention;

[0048] Figure 4 This is a schematic diagram of the second positioning fixture positioning vibrator assembly and the upper middle shell according to an embodiment of the present invention;

[0049] Figure 5 This is a schematic diagram of the stator assembly and the lower half of the middle shell according to an embodiment of the present invention;

[0050] Figure 6 This is a schematic diagram of the assembly of the oscillator assembly and the stator assembly according to an embodiment of the present invention;

[0051] Figure 7 This is a schematic diagram of the assembly of the upper middle shell and the oscillator assembly and the lower middle shell according to an embodiment of the present invention;

[0052] Figure 8 This is a schematic diagram of the assembly of the spring, housing, and oscillator assembly according to an embodiment of the present invention;

[0053] Figure 9 This is a schematic diagram of the assembly method of a vibration motor according to an embodiment of the present invention;

[0054] Figure 10 An exploded view of a vibration motor according to an embodiment of the present invention;

[0055] Figure 11 This is a schematic diagram of the oscillator assembly structure according to an embodiment of the present invention;

[0056] Figure 12 This is a schematic cross-sectional view of a stator assembly according to an embodiment of the present invention;

[0057] Figure 13 This is a schematic diagram of the vibration direction of a vibration motor according to an embodiment of the present invention;

[0058] Figure 14 This is a schematic cross-sectional view of a vibration motor according to an embodiment of the present invention;

[0059] Figure 15 This is a schematic diagram of semi-finished component size monitoring according to an embodiment of the present invention.

[0060] The reference numerals in the accompanying drawings include: 1. Upper shell, 2. Lower shell, 3. Upper middle shell, 31. First notch, 4. Lower middle shell, 41. Second notch, 5. First spring piece, 6. Second spring piece, 7. First magnetic yoke, 71. Convex structure, 72. Flat plate structure, 8. Second magnetic yoke, 11. Magnet, 12. Coil, 13. Coil support, 14. FPCB, 15. First positioning fixture, 151. First positioning groove, 152. First positioning block, 153. First positioning body, 16. Second positioning fixture, 161. Second positioning groove, 162. Third positioning groove, 163. Positioning clamping assembly, 1631. Spring component, 1632. Clamping block, 164. Second positioning block.

[0061] In all the accompanying drawings, the same reference numerals indicate similar or corresponding features or functions. Detailed Implementation

[0062] In the following description, numerous specific details are set forth for illustrative purposes and to provide a thorough understanding of one or more embodiments. However, it will be apparent that these embodiments may also be implemented without these specific details. In other instances, well-known structures and devices are shown in block diagram form for ease of description of one or more embodiments.

[0063] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0064] In view of the problems of high assembly difficulty and complex process of existing vibration motors mentioned above, this invention proposes a positioning component, an assembly method for a vibration motor, and a vibration motor.

[0065] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0066] To illustrate the positioning component provided by the present invention, Figures 1 to 4 The specific structure of the positioning component is shown from different angles. Specifically, Figure 1 A first positioning fixture structure according to an embodiment of the present invention is shown; Figure 2 The first positioning tooling positioning stator assembly and the lower half of the middle shell according to an embodiment of the present invention are shown; Figure 3 A second positioning fixture structure according to an embodiment of the present invention is shown; Figure 4 The second positioning fixture positioning oscillator assembly and the upper middle shell according to an embodiment of the present invention are shown.

[0067] like Figures 1 to 4 As shown in the figure, the present invention provides a positioning component, including a first positioning fixture 15 and a second positioning fixture 16, wherein the first positioning fixture 15 is used to position the stator assembly and the lower half of the middle shell 4, and the stator assembly and the lower half of the middle shell 4 are welded and assembled together to form a first semi-finished component; the second positioning fixture 16 is used to position the first semi-finished component, the oscillator assembly, and the upper half of the middle shell 3.

[0068] The first positioning fixture 15 includes: a first positioning fixture body 153, a first positioning groove 151 and a first positioning block 152 disposed on the first positioning fixture body 153. The first positioning groove 151 is disposed around the first positioning block 152. The first positioning groove 151 is used to position the lower half of the middle shell 4, and the first positioning block 152 is used to position the stator assembly. During positioning, the lower half of the middle shell 4 is first placed in the first positioning groove 151 for positioning, and then the stator assembly (coil 12 and coil support 13, the coil 12 and coil support 13 being an integrally formed structure) is placed on the first positioning block 152 for positioning. After positioning, the stator assembly and the lower half of the middle shell 4 are assembled together.

[0069] The second positioning fixture 16 includes: a second positioning fixture body, a second positioning groove 161 and a third positioning groove 162 disposed on the second positioning fixture body, a second positioning block 164, and a positioning clamping assembly 164. The second positioning block 164 is disposed around the second positioning groove 161 and the third positioning groove 162. The second positioning groove 161 is used to position the lower half of the middle shell 4 in the first semi-finished product assembly; the second positioning block 164 is used to position the stator assembly in the first semi-finished product assembly; the third positioning groove 162 is used to position the magnet 11 in the oscillator assembly; and the positioning clamping assembly 163 is used to position the magnetic yoke in the oscillator assembly. The magnetic yoke includes a first magnetic yoke 7 disposed at both ends of the magnet 11 along the vibration direction of the oscillator assembly and a second magnetic yoke 8 disposed on the outer periphery of the magnet 11. The positioning clamping assembly 163 clamps and positions the second magnetic yoke 8.

[0070] Specifically, the positioning and clamping assembly 163 includes a spring member 1631 and a clamping block 1632 connected to the spring member 1631. The spring member 1631 is connected to the second positioning fixture body, and the clamping block 1632 is used to clamp and position the second magnetic yoke 8 in the oscillator assembly. When the second magnetic yoke 8 is positioned, the positioning and clamping assembly 163 pops out from the second positioning fixture body through the spring member 1631 and achieves positioning of the second magnetic yoke 8 under the clamping of the clamping block 1632; when not positioned, the positioning and clamping assembly 163 is located in the second positioning fixture body.

[0071] In this invention, a method for assembling a vibration motor is also provided. To illustrate the method for assembling a vibration motor provided by this invention, Figures 5 to 9 The assembly method of the motor is shown from different angles. Specifically, Figure 5 The assembly process of the stator assembly and the lower half of the middle shell according to an embodiment of the present invention is shown; Figure 6 The assembly process of the oscillator assembly and the stator assembly according to an embodiment of the present invention is shown; Figure 7 The assembly process of the upper middle shell and oscillator assembly and the lower middle shell according to an embodiment of the present invention is shown. Figure 8 The assembly process of the spring, housing, and oscillator assembly according to an embodiment of the present invention is shown. Figure 9 The assembly process of the vibration motor provided by the present invention is shown.

[0072] like Figures 5 to 9 As shown in the figure, the vibration motor assembly method provided by the present invention uses the above-mentioned positioning components to position and assemble the vibration motor, and the method includes:

[0073] S1: The stator assembly, which is formed by the integrated structure of the lower middle shell, coil and coil support, is positioned by the first positioning fixture;

[0074] S2: Assemble the positioned lower half of the middle shell with the stator assembly to form the first semi-finished component;

[0075] S3: Position the first semi-finished component, the oscillator component formed by the magnet and the magnetic yoke, and the upper middle shell using the second positioning fixture;

[0076] S4: Assemble the first semi-finished component after positioning with the oscillator component and the upper middle shell;

[0077] S5: The installation gaps between the magnetic yoke and the upper and lower middle shells are detected by the monitoring system; among which,

[0078] If the detected installation gap is within the preset gap range, the elastic element is assembled with both ends of the magnetic yoke, the upper half of the middle shell, and the lower half of the middle shell respectively.

[0079] If the detected installation gap is not within the preset gap range, the first semi-finished component and the oscillator component will be repositioned and reassembled.

[0080] S6: Assemble the upper shell and lower shell with the upper middle shell and lower middle shell respectively to form a vibration motor.

[0081] Figure 9 Combination Figures 6 to 8 In an embodiment of the present invention, in steps S1 and S2, the lower half of the middle shell 4 is first positioned in the first positioning groove 151, and then the stator assembly (coil 12 and coil support 13, the coil 12 and coil support 13 being an integrally formed structure) is positioned on the first positioning block 152. After positioning, the stator assembly and the lower half of the middle shell 4 are assembled together. The positioned lower half of the middle shell 4 and the stator assembly are assembled together to form a first semi-finished assembly. During the assembly process, the lower half of the middle shell 4 and the coil support 13 of the stator assembly are fixed together to form the first semi-finished assembly.

[0082] In steps S3 and S4, the first semi-finished component is first placed on the second positioning fixture 16, wherein the lower half of the shell 4 of the first semi-finished component is placed in the second positioning groove 161, and the stator component is placed in the second positioning block 164; then the oscillator component is placed in the third positioning groove 162, wherein one end of the magnet 11 of the oscillator component is accommodated in the third positioning groove 162; when positioning the second magnetic yoke 8, the positioning clamping component 163 pops out from the body of the second positioning fixture through the spring member 1631, and achieves positioning of the second magnetic yoke 8 under the clamping of the clamping block 1632.

[0083] In this invention, the first semi-finished product assembly after positioning is assembled with the oscillator assembly and the upper shell, specifically including: assembling the first semi-finished product assembly after positioning with the oscillator assembly (magnetic yoke and magnet 11) to form the second semi-finished product assembly; and assembling the upper shell 3 after positioning with the second semi-finished product assembly to form the third semi-finished product assembly.

[0084] In S5, the magnetic yoke includes a first magnetic yoke 7 disposed at both ends of the magnet 11 along the vibration direction of the oscillator assembly and a second magnetic yoke 8 disposed on the outer periphery of the magnet 11.

[0085] The installation gaps between the second magnetic yoke 8 and the upper middle shell 3 and the lower middle shell 4 are detected by the monitoring system; Figure 15 In the illustrated embodiment, the installation gap d between the detected second magnetic yoke 8 and the upper half of the middle shell 3 and the lower half of the middle shell 4 is used to determine whether to assemble the elastic element onto the middle shell and the oscillator assembly. Specifically, if the detected installation gap is within a preset gap range, the elastic element is assembled with both ends of the first magnetic yoke 8, the upper half of the middle shell 3, and the lower half of the middle shell 4, respectively; if the detected installation gap is not within the preset gap range, the first semi-finished assembly and the oscillator assembly are repositioned and reassembled.

[0086] The elastic element includes a first spring and a second spring. The assembly process involves: if the installation gap between the first magnetic yoke 7 and the upper shell 3 is within a preset gap range, then the first spring 5 is assembled with one end of the magnetic yoke 7 and the upper shell 3 respectively; if the installation gap between the first magnetic yoke 7 and the lower shell 4 is within a preset gap range, then the second spring 6 is assembled with the other end of the first magnetic yoke 7 and the lower shell 4 respectively; if the installation gap between the first magnetic yoke 7 and the upper shell 3 is not within a preset gap range, then the first semi-finished product assembly, the oscillator assembly, and the upper shell 3 are repositioned and assembled using the second positioning fixture 16; if the installation gap between the first magnetic yoke 7 and the lower shell 4 is not within a preset gap range, then the first semi-finished product assembly and the oscillator assembly are repositioned and assembled using the second positioning fixture 16.

[0087] In an embodiment of the present invention, during assembly, the first positioning fixture 15 is used to make the coil 12 coincide with the central axis of the lower half of the middle shell 4; the second positioning fixture 16 is used to position the first semi-finished product assembly, the oscillator assembly, and the upper half of the middle shell 3 before assembly; thereby making the central axis of the oscillator assembly, the stator assembly, and the middle shell coincide; the installation gap between the magnetic yoke in the oscillator assembly and the upper half of the middle shell and the lower half of the middle shell is detected by the monitoring system. If the detected installation gap is within a preset gap range, the elastic element is assembled with both ends of the magnetic yoke, the upper half of the middle shell, and the lower half of the middle shell; if the detected installation gap is not within the preset gap range, the first semi-finished product assembly and the oscillator assembly are repositioned and reassembled. This assembly method adopted by the present invention can ensure that the magnet in the oscillator assembly coincides with the central axis of the magnetic yoke, the coil of the stator assembly, and the middle shell, which can not only ensure the accuracy of assembly, but also simplify the assembly process and thus improve the assembly efficiency.

[0088] Furthermore, this invention also provides a vibration motor. To illustrate the structure of the vibration motor provided by this invention, Figures 10 to 14 The structure of the vibration motor is illustrated exemplarily from different perspectives. Specifically, Figure 10 An explosion structure of a vibration motor according to an embodiment of the present invention is shown; Figure 11 An oscillator assembly structure according to an embodiment of the present invention is shown; Figure 12 A cross-sectional structure of a stator assembly according to an embodiment of the present invention is shown; Figure 13 The vibration direction of the vibration motor according to an embodiment of the present invention is shown; Figure 14 A cross-sectional structure of a vibration motor according to an embodiment of the present invention is shown.

[0089] like Figures 11 to 14 As shown in the figure, the vibration motor provided by the present invention, which is assembled using the above-described vibration motor assembly method, mainly includes: a housing with a accommodating space, an oscillator assembly, a stator assembly, and an elastic element; the housing includes a middle shell, which includes an upper middle shell 3 and a lower middle shell 4 arranged along the vibration direction of the oscillator assembly. Notches are provided on adjacent sides of the upper middle shell 3 and the lower middle shell 4, and the two opposite notches together form an opening; the oscillator assembly includes a magnet 11 and a magnetic yoke with a cavity. The magnet 11 is located in the cavity of the magnetic yoke, and an installation gap is provided between the magnetic yoke and the middle shell. The oscillator assembly is suspended in the housing by the elastic element; the stator assembly includes a coil support 13 respectively disposed on the upper middle shell 3 and the lower middle shell 4, and a coil 12 disposed on the coil support 13. The stator assembly is fixed in the housing, and the coil 12 is energized to drive the oscillator assembly to vibrate.

[0090] The vibration motor of this invention can be applied in electronic devices to drive at least a portion of the electronic device to vibrate relative to a fixed part to generate sound. The vibration motor includes a vibrator assembly configured to connect to a vibrating part of the electronic device, for example, to drive the screen and / or the back cover opposite the screen of the electronic device to vibrate to generate sound. The fixed part can be a fixed component in the electronic device to which the vibration motor is applied, or it can be a separately configured fixed part.

[0091] The vibration motor can be mounted on the electronic device through a housing. It should be noted that the housing of the vibration motor can be a separate shell or enclosure structure from the electronic device. In this case, the housing integrates the vibrator assembly and stator assembly of the vibration motor into a single structure, facilitating assembly and disassembly. Alternatively, the housing of the vibration motor can be integrally molded with the shell or enclosure structure of the electronic device, which effectively improves structural strength and sealing performance.

[0092] In this embodiment, the housing includes an upper shell 1, a lower shell 2, and a middle shell located between the upper shell 1 and the lower shell 2. The middle shell includes an upper middle shell 3 and a lower middle shell 4 arranged along the vibration direction of the oscillator assembly. The upper middle shell 3 and the lower middle shell 4 are symmetrical structures. Notches are provided on adjacent sides of the upper middle shell 3 and the lower middle shell 4, and two opposing notches together form an opening. Two opposing first notches 31 are provided on the upper middle shell 3, and two opposing second notches 41 are provided on the lower middle shell 4. The first notches 31 and the second notches 41 are correspondingly provided to form the opening of the middle shell.

[0093] The coil support 13 includes a support body and connecting parts. Connecting parts are provided at opposite ends of the support body. Two opposite openings are provided on the circumferential sidewall of the housing, and the two connecting parts are respectively provided with the two openings. The connecting parts are formed by extending from the edge of the support body along the vibration direction of the oscillator assembly. At the end of the connecting part away from the support body, a groove is formed with the opening on the middle shell for fixing the FPCB14.

[0094] In specific applications, depending on the actual situation, the middle shell can be divided into two parts (upper middle shell 3 and lower middle shell 4). Notches are provided on the adjacent sides of the upper middle shell 3 and the lower middle shell 4. That is, the connecting part of the coil bracket 13 is located at the opening of the middle shell and is fixed to the inner wall of the middle shell. The connecting part of the coil bracket 13 is welded to the inner wall of the upper middle shell 3 and the lower middle shell 4 respectively, so that the connecting part of the coil bracket 13 and the opening form an installation groove, i.e., a recess.

[0095] The mounting slot can be a circular hole, an elliptical hole, a square hole, a triangular hole, or other polygonal or irregularly shaped hole. The specific structure of the mounting slot can be determined according to the specific shapes of the first notch 31 and the second notch 41. In specific applications, the slot can be selected and set according to actual needs, and no limitation is made here.

[0096] In an embodiment of the present invention, the oscillator assembly includes a magnet 11 and a magnetically conductive yoke having a cavity, with the magnet 11 located within the cavity. Specifically, the magnetically conductive yoke includes a first magnetically conductive yoke 7 disposed at both ends of the magnet 11 along the vibration direction of the oscillator assembly and a second magnetically conductive yoke 8 disposed on the outer periphery of the magnet 11. The first magnetically conductive yoke 7 and the second magnetically conductive yoke 7 form a cavity, the magnet 11 and the second magnetically conductive yoke 8 are spaced apart, and the coil 12 is located between the magnet 11 and the second magnetically conductive yoke 8.

[0097] In other words, the magnetic yoke comprises two first magnetic yokes 7 and two second magnetic yokes 8 welded together to form a magnetic yoke cavity, and the magnet 11 is enclosed within the magnetic yoke cavity. The first magnetic yoke 7 includes a convex structure located in the middle and a flat plate structure disposed on the outer periphery of the convex structure; the second magnetic yokes 8 are arc-shaped structures, and the two second magnetic yokes 8 are combined to form a cylindrical structure. The first magnetic yoke 7 includes a convex structure 71 located in the middle and a flat plate structure 72 disposed on the outer periphery of the convex structure 71, and the convex structure 71 is connected to an elastic element. There are two second magnetic yokes 8, both of which are arc-shaped structures, and the two second magnetic yokes 8 are spaced apart circumferentially to form a space through which the coil support 13 passes. The magnetic yoke structure formed by the two first magnetic yokes 7 and the two second magnetic yokes 8 welded together encloses the electromagnetic field generated by the magnet 11 inside, forming a converging and concentrating effect on the magnetic field generated by the magnet 11, correcting and gathering the magnetic field lines emitted by the magnet assembly, thereby increasing the magnetic field strength and reducing magnetic leakage.

[0098] In an embodiment of the present invention, the stator assembly includes a coil support 13 disposed on the housing, a coil 12 disposed on the coil support 13, and an FPCB 14. The coil 12 is sleeved between the second magnetic yoke 8 and the housing. A gap is provided between the coil 12 and the oscillator assembly. The magnetic field generated by the cylindrical magnet 11 is stable and symmetrical, and the magnetic yoke prevents magnetic field leakage from the magnet 11, resulting in better magnetic field strength. When the coil 12 is energized, it generates an electromagnetic field that interacts with the magnetic field generated by the oscillator assembly, causing the oscillator to move along the Z-axis. When the driving electrical signal is an alternating signal, the oscillator assembly is subjected to an alternating force, generating vibration. In other words, when the coil 12 is energized, the Ampere force generated between the coil 12 and the oscillator assembly is stronger, the Ampere force vibrates along the Z-axis, and it is less prone to tilting in the Z-axis, resulting in a more stable vibration effect.

[0099] During assembly, the first positioning fixture 15 and the second positioning fixture 16 ensure that the magnet 11, the first magnetic yoke 7, the second magnetic yoke 8, the coil 12, and the central axis of the middle shell are aligned. Specifically, the first positioning fixture 15 ensures that the central axis of the lower middle shell 4 is aligned with that of the coil 12, and the second positioning fixture 16 ensures that the central axis of the lower middle shell 4 is aligned with that of the magnet 11, the first magnetic yoke 7, the second magnetic yoke 8, and the coil 12. This ensures the accuracy of the assembly of the vibration motor and simplifies the assembly process, thereby improving assembly efficiency.

[0100] Furthermore, the middle shell can be made of a magnetically conductive material. Since the middle shell consists of two parts that are assembled sequentially, during assembly, the first positioning fixture 15 and the second positioning fixture 16 precisely position the center of the magnet 11, the first magnetically conductive yoke 7, the second magnetically conductive yoke 8, and the coil 12, ensuring their central axes coincide. This prevents uneven magnetic field forces from being generated on the magnetically conductive middle shell, ensuring dimensional accuracy during installation. Additionally, using a magnetically conductive middle shell can improve the performance of the vibration motor. In specific applications, the appropriate material for the middle shell can be selected based on the actual situation; that is, a middle shell with or without a magnetically conductive material can be used, without specific limitations.

[0101] In an embodiment of the present invention, the elastic element is two planar helical springs, which are respectively disposed at both ends of the oscillator assembly along the vibration direction of the oscillator assembly. Figures 10 to 14 In the illustrated embodiment, the spring includes a central fixing part, multiple spring arms spirally extending from the central fixing part, and a peripheral fixing part connecting the outer ends of the spring arms. The central fixing part is connected to the oscillator assembly, and the peripheral fixing part is fixedly connected to the housing. Specifically, the elastic element includes a first spring 5 and a second spring 6, wherein the first spring 5 is connected to the upper half of the middle shell 3 and the first magnetic yoke 7 located at the upper end of the magnet 11; the second spring 6 is connected to the lower half of the middle shell 4 and the first magnetic yoke 7 located at the lower end of the magnet 11.

[0102] In embodiments of the present invention, the spring plate provides restoring force and buffering for the vibration of the oscillator assembly, and also provides restoring force for the screen of the electronic product to reset after vibration, reducing the risk of screen damage or incorrect screen reset. The spring plate also provides damping and buffering, cushioning the impact force on the screen and preventing damage from frequently changing ampere forces. Furthermore, when the screen is made of a relatively soft material with good deformation capacity but relatively poor elastic recovery capacity, the spring plate can provide a return force to the screen, allowing it to return to its initial equilibrium position after each vibration. This improves both the screen's lifespan and the acoustic performance of the vibration motor.

[0103] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made under the concept of the present invention using the description and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A positioning component, characterized in that, It includes a first positioning fixture and a second positioning fixture, wherein the first positioning fixture is used to position the stator assembly and the lower half of the middle shell, wherein the stator assembly and the lower half of the middle shell are welded and assembled together to form a first semi-finished assembly; The second positioning fixture is used to position the first semi-finished product assembly, the oscillator assembly, and the upper middle shell.

2. The positioning component according to claim 1, characterized in that, The first positioning fixture includes: a first positioning fixture body, a first positioning groove and a first positioning block disposed on the first positioning fixture body, wherein, The first positioning groove is arranged around the first positioning block. The first positioning groove is used to position the lower half of the middle shell, and the first positioning block is used to position the stator assembly.

3. The positioning component according to claim 1, characterized in that, The second positioning fixture includes: a second positioning fixture body, a second positioning groove and a third positioning groove disposed on the second positioning fixture body, a second positioning block, and a clamping assembly, wherein the second positioning block is disposed around the second positioning groove and the third positioning groove, wherein... The second positioning groove is used to position the lower half of the middle shell in the first semi-finished product component; The second positioning block is used to position the stator component in the first semi-finished product assembly; The third positioning groove is used to position the magnet in the oscillator assembly; The clamping assembly is used to position the magnetic yoke in the oscillator assembly.

4. The positioning component according to claim 3, characterized in that, The clamping assembly includes a spring and a clamping block connected to the spring. The spring is connected to the second positioning fixture body, and the clamping block is used to clamp and position the magnetic yoke in the oscillator assembly.

5. A method for assembling a vibration motor, characterized in that, The method of assembling a vibration motor using the positioning component as described in any one of claims 1-4 includes: S1: The stator assembly, which is formed by the integrated structure of the lower middle shell, coil and coil support, is positioned by the first positioning fixture; S2: Assemble the positioned lower half of the middle shell with the stator assembly to form the first semi-finished component; S3: Position the first semi-finished product assembly, the oscillator assembly formed by the magnet and the magnetic yoke, and the upper shell using the second positioning fixture; S4: Assemble the positioned first semi-finished component together with the oscillator component and the upper middle shell; S5: The installation gaps between the magnetic yoke and the upper and lower middle shells are detected by the monitoring system; wherein... If the detected installation gap is within the preset gap range, the elastic element is assembled with both ends of the magnetic yoke, the upper half of the middle shell, and the lower half of the middle shell respectively. If the detected installation gap is not within the preset gap range, the first semi-finished component and the oscillator component will be repositioned and reassembled. S6: Assemble the upper shell and lower shell with the upper middle shell and the lower middle shell respectively to form the vibration motor.

6. The assembly method of the vibration motor according to claim 5, characterized in that, In S4, it includes: The first semi-finished component after positioning is assembled with the oscillator component to form the second semi-finished component; The positioned upper shell is assembled with the second semi-finished component to form the third semi-finished component.

7. The assembly method of the vibration motor according to claim 6, characterized in that, The elastic element includes a first spring sheet and a second spring sheet, and in S5, it includes: If the installation gap between the magnetic yoke and the upper shell is within a preset gap range, then the first spring piece is assembled with one end of the magnetic yoke and the upper shell respectively. If the installation gap between the magnetic yoke and the lower half of the middle shell is within the preset gap range, then the second spring piece is assembled with one end of the magnetic yoke and the lower half of the middle shell respectively; If the installation gap between the magnetic yoke and the upper shell is not within the preset gap range, the first semi-finished product assembly, the oscillator assembly, and the upper shell are repositioned and reassembled using the second positioning fixture. If the installation gap between the magnetic yoke and the lower half of the shell is not within the preset gap range, the first semi-finished product assembly and the oscillator assembly are repositioned and reassembled using the second positioning fixture.

8. A vibration motor, characterized in that, A vibration motor assembled using the assembly method of any one of claims 5-7 includes a housing with a receiving space, an oscillator assembly, a stator assembly, and an elastic element. The housing includes a middle shell, which comprises an upper middle shell and a lower middle shell arranged along the vibration direction of the oscillator assembly. The oscillator assembly includes a magnet and a magnetically conductive yoke with a cavity. The magnet is located in the cavity of the magnetically conductive yoke. An installation gap is provided between the magnetically conductive yoke and the middle shell. The oscillator assembly is suspended in the shell by an elastic element. The elastic element is connected to the upper middle shell and the lower middle shell respectively. The stator assembly includes a coil support respectively disposed on the upper half of the middle shell and the lower half of the middle shell, and a coil disposed on the coil support. The stator assembly is fixed inside the shell, and the coil is energized to drive the oscillator assembly to vibrate.

9. The vibration motor according to claim 8, characterized in that, The magnetic yoke includes a first magnetic yoke disposed at both ends of the magnet along the vibration direction of the oscillator assembly and a second magnetic yoke disposed on the outer periphery of the magnet. The first magnetic yoke and the second magnetic yoke form the cavity. The magnet and the second magnetic yoke are spaced apart. The coil is located between the magnet and the second magnetic yoke.

10. The vibration motor according to claim 8, characterized in that, Notches are provided on adjacent sides of both the upper and lower middle shells, and two opposite notches together form an opening; The coil support includes a support body and a connecting part. The coil is fixed to the support body. The connecting part is located at the opening of the middle shell and fixed to the inner wall surface of the middle shell. The connecting part is fixed to the middle shell. The connecting parts are provided at both opposite ends of the support body, and two opposite openings are provided on the circumferential sidewall of the middle shell, with the two connecting parts corresponding to the two openings respectively.

11. The vibration motor according to claim 10, characterized in that, The connecting portion is formed by extending from the edge of the support body along the vibration direction of the oscillator assembly, and a groove is formed between the end of the connecting portion away from the support body and the opening on the middle shell.

12. The vibration motor according to claim 11, characterized in that, It also includes a circuit board, one end of which is fixed in the groove and has pads for soldering to the leads of the coil, and the other end of which is electrically connected to an external circuit.

Images