Linear vibration motor and electronic device

Abstract

This invention relates to a linear vibration motor and an electronic device. The linear vibration motor includes a cuboid housing, a mover assembly, a stator assembly, and an elastic element. The mover assembly and stator assembly are located vertically spaced within the housing. The housing includes an upper shell with an open end and an accommodating space, and a lower shell with a mounting groove. The upper shell includes a bottom wall and two pairs of long and short side walls integrally bent vertically from the periphery of the bottom wall. A third mounting groove is recessed at the center of one long side wall of the upper shell. The mover assembly is connected and fixed within the accommodating space of the upper shell, and the stator assembly is fixed within the mounting groove of the lower shell. A notch is formed on the side wall of the mounting groove corresponding to the position of the third mounting groove, and the free end of the side wall of the mounting groove is integrally bent vertically outward to form a flange. This invention provides a compact linear vibration motor with higher adaptability to the structure of electronic devices, improving the space utilization of the linear vibration motor within electronic devices.

Description

Technical Field

[0001] This utility model relates to the field of intelligent terminal electronic equipment technology, and in particular to a linear vibration motor and electronic equipment. Background Technology

[0002] With the development of electronic technology, portable consumer electronics products have gradually occupied the global consumer market, such as smartphones and smart wearable devices. These electronic products generally use linear vibration motors for haptic feedback, such as incoming call notifications on mobile phones and vibration feedback in game consoles. To meet such a wide range of applications, the miniaturization requirements for linear vibration motors are becoming increasingly stringent.

[0003] Existing linear vibration motors typically include a housing with a accommodating space, an oscillator, a stator, and springs. The housing includes a shell and cover that fit and snap together. The oscillator, stator, and springs are housed within the accommodating space. The oscillator includes a mass block and a magnet. The stator assembly includes a circuit board containing coils and a power supply coil. Existing linear vibration motors convert electrical energy into linear motion mechanical energy. The oscillator vibrates by causing the magnet to move through the repulsion or attraction of the coils. However, when existing linear vibration motors are installed in specific locations within circular electronic products, especially at the edges, the housing's fit with the internal space of the electronic product is poor, resulting in low space utilization. Therefore, there is an urgent need for a compact linear vibration motor to solve the technical problem of low space utilization when installed within electronic products. Summary of the Invention

[0004] The purpose of this utility model is to provide a linear vibration motor with a compact structure and high compatibility with electronic devices. The specific technical solution is as follows:

[0005] A linear vibration motor includes a cuboid housing, a mover assembly, a stator assembly, and an elastic element. The mover assembly and the stator assembly are located vertically spaced within the housing. The housing includes an upper shell with an open end and an accommodating space, and a lower shell with a mounting groove. The upper shell includes a bottom wall and two pairs of long side walls and short side walls integrally bent vertically from the periphery of the bottom wall. A third mounting groove is recessed at the center of one long side wall of the upper shell. The mover assembly is connected and fixed within the accommodating space of the upper shell, and the stator assembly is fixed within the mounting groove of the lower shell. A notch is formed on the side wall of the mounting groove corresponding to the position of the third mounting groove, and the free end of the side wall of the mounting groove is integrally bent vertically outward to form a flange.

[0006] Preferably, the height of the notch is consistent with the depth of the mounting groove; the shape of the flange is adapted to the upper shell.

[0007] Preferably, the mounting groove protrudes outward from the lower shell and includes a first mounting groove and a second mounting groove.

[0008] Preferably, the area of ​​the second mounting groove is smaller than the area of ​​the first mounting groove, and the second mounting groove is located in the center of the first mounting groove and protrudes outward from the lower shell.

[0009] Preferably, the stator assembly includes a coil and a flexible circuit board, the flexible circuit board including an internal power terminal and an external power terminal integrally formed with the internal power terminal; the coil is fixed in the first mounting groove, the internal power terminal is fixed in the second mounting groove, and the external power terminal extends from the notch to accommodate space and is bent and attached to the third mounting groove.

[0010] Preferably, the moving part assembly is connected and fixed to the long side wall by the elastic elements on both sides thereon and is elastically supported within the accommodating space.

[0011] Preferably, the mover assembly includes a mass block, a permanent magnet, and a yoke; the mass block has a first groove recessed on the side facing the stator assembly and second grooves recessed on both sides facing the elastic element; the permanent magnet is embedded in the first groove; the yoke is L-shaped, including a long side and a short side, the long side is fixed in the second groove, and the short side holds the permanent magnet.

[0012] Preferably, the diagonal position of the long side wall is recessed towards the accommodating space for positioning, one end of the elastic member is connected to both sides of the mass block, and the other end is connected to the positioning part.

[0013] An electronic device includes a cylindrical housing with an internal mounting space, and further includes a linear vibration motor fixed to the edge of the housing, a lower housing adjacent to the arcuate inner wall of the housing, and a first mounting groove of the lower housing protruding toward the arcuate inner wall of the housing.

[0014] Compared with the prior art, this utility model provides a linear vibration motor with a simple structure. The mounting groove recessed on the long side wall of the upper shell is used to install the external power terminal of the flexible circuit board, which helps to promote the miniaturization of the linear vibration motor. The mounting groove protruding from the lower shell is used to accommodate the stator assembly, thereby optimizing the internal space of the linear vibration motor and making the structure of the linear vibration motor more compact. This linear vibration motor is installed at the edge of the electronic device. By adapting the structure of the mounting groove protruding from the lower shell to the arc-shaped inner wall of the electronic device's casing, the space utilization rate of the linear vibration motor within the electronic device is improved. Attached Figure Description

[0015] Figure 1 This is a perspective view of the linear vibration motor of this utility model.

[0016] Figure 2This is an exploded view of the structure of the linear vibration motor of this utility model.

[0017] Figure 3 This is a perspective view of the upper shell of this utility model.

[0018] Figure 4 This is an exploded view of the stator assembly and lower shell of this utility model.

[0019] Figure 5 This is an exploded view of the structure of the moving part of this utility model.

[0020] Figure 6 This is a cross-sectional view of the linear vibration motor of this utility model.

[0021] Figure 7 This is a schematic diagram of the assembly of the linear vibration motor and electronic equipment of this utility model.

[0022] in:

[0023] 1000 - Linear vibration motor; 1 - Upper shell; 10 - Long side wall; 101 - Third mounting slot; 102 - Positioning part; 2 - Lower shell; 20 - Mounting slot; 21 - Flange; 22 - Notch; 200 - First mounting slot; 201 - Second mounting slot; 3 - Mover assembly; 30 - Mass block; 301 - First groove; 302 - Second groove; 31 - Permanent magnet; 32 - Magnetic yoke; 4 - Stator assembly; 40 - Coil; 41 - Flexible circuit board; 410 - Internal power terminal; 411 - External power terminal; 5 - Elastic element; 2000 - Electronic equipment. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] The structure of a linear vibration motor according to this utility model is as follows: Figures 1 to 6As shown, the device includes a cuboid shell (not shown), a mover assembly 3, a stator assembly 4, and elastic elements 5. The shell includes an upper shell 1 with an opening at one end and an accommodating space (not shown) and a lower shell 2 with a mounting groove 20. The upper shell 1 includes a bottom wall and two pairs of long side walls 10 and short side walls (not shown) formed by integrally bending vertically from the periphery of the bottom wall (not shown). A third mounting groove 101 is recessed in the center of one side of the long side wall 10 of the upper shell 1. The length of the third mounting groove 101 is the same as the height of the long side wall 10. A positioning part 102 is recessed at the diagonal position of the long side wall 10 towards the accommodating space. The mover assembly 3 is connected and fixed to the long side wall 10 through the elastic elements 5 on both sides and is elastically supported in the accommodating space. The stator assembly 4 is fixed to the mounting groove 20 of the lower shell 2. The mover assembly 3 and the stator assembly 4 are located in the shell with a vertical gap between them.

[0026] The side wall of the mounting groove 20 of the lower shell 2 is integrally bent vertically outward to form a flange 21, and a notch 22 is opened on the side wall of the mounting groove 20 corresponding to the third mounting groove 101. The height of the notch 22 is consistent with the depth of the mounting groove 20. The shape of the flange 21 is adapted to the upper shell 1. The mounting groove 20 protrudes outward from the lower shell 1 and includes a first mounting groove 200 and a second mounting groove 201. The first mounting groove 200 and the second mounting groove 201 are connected vertically. The area of ​​the first mounting groove 200 is smaller than the area of ​​the second mounting groove 201. The first mounting groove 200 is located in the center of the second mounting groove 201 and protrudes outward from the lower shell 1.

[0027] The stator assembly 4 includes a coil 41 and a flexible circuit board 40. The flexible circuit board 40 includes an internal power terminal 401 and an external power terminal 402 integrally formed with the internal power terminal 401. The internal power terminal 401 is fixed in the second mounting groove 201. The external power terminal 402 extends from the notch 22 to accommodate space and is bent and attached to the third mounting groove 101. The thickness of the external power terminal 402 is less than or equal to the depth of the third mounting groove 101. The coil 41 is fixed in the first mounting groove 200, making the structure of the linear vibration motor more compact and saving the space of the stator assembly 4 in the housing. It also saves the space on both sides of the upper housing 1, thereby effectively saving the installation space of the linear vibration motor in the electronic device.

[0028] The mover assembly 3 includes a mass block 30, a permanent magnet 31, and a yoke 32. The mass block 30 has a first groove 301 recessed on the side facing the stator assembly, and second grooves 302 recessed on both sides facing the elastic member 5. The permanent magnet 31 is embedded in the first groove 301, and the thickness of the permanent magnet 31 is equal to the thickness between the second grooves 302 on both sides of the mass block 30. The thickness of the yoke 32 is less than or equal to the depth of the second grooves 302. The yoke 32 is L-shaped, including a long side (not shown) and a short side (not shown) integrally bent vertically. The long side is fixed in the second groove 302 and covers both sides of the mass block 30 and the permanent magnet 31. The short side holds the permanent magnet 31 towards the coil 41. One side surface can not only fix the permanent magnet 31 more stably on the mass block 30, but also effectively shield the magnetic field, making the magnetic lines of force of the entire mover assembly 3 more concentrated along the vibration direction, which is conducive to improving the stability and reliability of the linear vibration motor during vibration; one end of the elastic member 5 is connected to both sides of the mass block 30, and the other end is connected to the positioning part 102, thereby elastically supporting the mover assembly 3 in the accommodating space of the upper shell 1. The horizontal projection of the first groove 301 and the second groove 302 is within the horizontal projection of the positioning parts 102 on both sides of the upper shell 1, so as to ensure that the length of the elastic member 5 is sufficient to generate deformation and rebound force, thereby improving the vibration of the linear vibration motor.

[0029] A schematic diagram of the mounting structure of a linear vibration motor and electronic equipment is shown below. Figure 7 The electronic device 2000 includes a cylindrical housing (not shown) with an internal mounting space (not shown). A linear vibration motor 1000 is fixed to the edge of the housing. The lower shell 2 of the linear vibration motor 1000 is adjacent to the arc-shaped inner wall of the housing. The mounting groove of the lower shell 2 protrudes towards the arc-shaped inner wall of the housing, making the protruding mounting groove structure of the lower shell 2 more compatible with the arc-shaped inner wall of the housing of the electronic device 2000, and further improving the space utilization rate of the linear vibration motor 1000 within the electronic device 2000.

[0030] It should be noted that in the description of this utility model, the terms "upper", "lower", "front", "rear", "left", "horizontal direction", "vertical direction", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component 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 utility model.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A linear vibration motor, comprising a cuboid housing, a mover assembly, a stator assembly, and an elastic element, wherein the mover assembly and the stator assembly are vertically spaced within the housing, characterized in that, The housing includes an upper shell with an opening at one end and an accommodating space, and a lower shell with a mounting groove; the upper shell includes a bottom wall and two pairs of long side walls and short side walls integrally bent vertically from the periphery of the bottom wall, and a third mounting groove is recessed at the center of one long side wall of the upper shell; the moving part assembly is connected and fixed in the accommodating space of the upper shell, and the stator assembly is fixed in the mounting groove of the lower shell; the side wall of the mounting groove has a notch corresponding to the position of the third mounting groove, and the free end of the side wall of the mounting groove is integrally bent vertically outward to form a flange.

2. The linear vibration motor according to claim 1, characterized in that, The height of the notch is consistent with the depth of the mounting groove; the shape of the flange is adapted to the upper shell.

3. The linear vibration motor according to claim 1, characterized in that, The mounting groove protrudes outward from the lower shell and includes a first mounting groove and a second mounting groove.

4. The linear vibration motor according to claim 3, characterized in that, The area of ​​the second mounting groove is smaller than that of the first mounting groove, and the second mounting groove is located in the center of the first mounting groove and protrudes outward from the lower shell.

5. The linear vibration motor according to claim 4, characterized in that, The stator assembly includes a coil and a flexible circuit board. The flexible circuit board includes an internal power terminal and an external power terminal integrally formed with the internal power terminal. The coil is fixed in the first mounting slot, the internal power terminal is fixed in the second mounting slot, and the external power terminal extends from the notch to accommodate space and is bent and attached to the third mounting slot.

6. The linear vibration motor according to claim 1, characterized in that, The moving part assembly is connected and fixed to the long sidewall via the elastic members on both sides and is elastically supported within the accommodating space.

7. The linear vibration motor according to claim 6, characterized in that, The moving part assembly includes a mass block, a permanent magnet, and a yoke; the mass block has a first groove recessed on the side facing the stator assembly and second grooves recessed on both sides facing the elastic element; the permanent magnet is embedded in the first groove; the yoke is L-shaped, including a long side and a short side, the long side is fixed in the second groove, and the short side holds the permanent magnet.

8. The linear vibration motor according to claim 7, characterized in that, The diagonal position of the long side wall is recessed towards the accommodating space for positioning. One end of the elastic member is connected to both sides of the mass block, and the other end is connected to the positioning part.

9. An electronic device comprising a cylindrical housing having an internal mounting space, characterized in that, It also includes the linear vibration motor according to any one of claims 1-8, wherein the linear vibration motor is fixed to the edge of the housing, the lower housing is adjacent to the arc-shaped inner wall of the housing, and the first mounting groove of the lower housing protrudes toward the arc-shaped inner wall of the housing.

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