Linear vibration motor

Abstract

The utility model relates to the technical field of vibration motors, and discloses a linear vibration motor, which comprises a cuboid shell with an opening at one end, a cover body, a vibrator assembly, a stator assembly and an elastic piece, the shell and the cover body are buckled to form an accommodating space, the stator assembly comprises a coil and a flexible circuit board, the flexible circuit board comprises an internal power connection end and an external power connection end, and the elastic piece is arranged in the accommodating space. The internal power connection end is located in the containing space, the shell comprises a bottom wall, two side short side walls and two side long side walls, each long side wall comprises a body and a first step part lower than the body, a first notch is formed in the edge of the free end of the long side wall of the first step part, and the external power connection end extends out of the first notch and is fixed to the outer surface of the first step part; a second notch is formed in the position, corresponding to the position between the first notch and the short side wall, of the cover body, and the second notch is matched with part of the free end edge of the first step part. The vibration motor is high in structural stability and good in vibration performance.

Description

Technical Field

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

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

[0003] Existing linear vibration motors convert electrical energy into linear mechanical energy. They use the repulsion or attraction of a coil to a magnet to move the magnet, thus causing the mass block to vibrate. A typical linear vibration motor includes a housing, a cover, an oscillator, a stator, and springs. The housing and cover are welded together to form a housing space, within which the oscillator, stator, and springs are placed. The oscillator includes a mass block and a magnet, while the stator includes a coil and a flexible circuit board. Magnets are positioned on the mass block corresponding to the coil positions. Springs are positioned between the mass block and the housing sidewalls, elastically suspending the oscillator within the housing space. Simultaneously, the coil is electrically connected to the flexible circuit board, which is connected to an external power source, changing the direction of the current in the coil to achieve the vibration output of the mass block. However, with changing usage requirements and the diverse external power supply methods for the flexible circuit board, existing linear motors suffer from poor compatibility between the housing and cover, easily leading to incomplete welding and misalignment of the housing and cover after assembly, affecting vibration performance.

[0004] Therefore, there is an urgent need for a linear vibration motor with good vibration performance to solve the technical problems of existing vibration motors. Utility Model Content

[0005] The purpose of this utility model is to provide a linear vibration motor with a simple structure and good vibration performance. The specific technical solution is as follows:

[0006] A linear vibration motor includes a cuboid housing with one open end, a cover, an oscillator assembly, a stator assembly, and elastic elements. The housing and the cover are fastened together to form an accommodating space. The oscillator assembly is connected to the housing and suspended within the accommodating space by the elastic elements fixing its two sides. The stator assembly is fixed to the cover. 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. The internal power terminal is located within the accommodating space. The housing includes a bottom wall, two short side walls, and two long side walls. The long side walls include a main portion and a first stepped portion lower than the main portion. A first notch is provided at the free end edge of the long side wall of the first stepped portion. The external power terminal extends out of the accommodating space from the first notch and is fixed to the outer surface of the first stepped portion. The cover has a second notch corresponding to the position between the first notch and the short side wall. The second notch is adapted to a portion of the free end edge of the first stepped portion.

[0007] Preferably, the free end face of the second notch is flush with the outer surface of the first step portion.

[0008] Preferably, the height of the first step is greater than or equal to the thickness of the external electrical terminal.

[0009] Preferably, the two long side walls are provided with a second step and a third step for connecting the elastic element at opposite corners.

[0010] Preferably, the first step portion and the second step portion are at the same height, and the second step portion is higher than the third step portion.

[0011] Preferably, the second step portion and the third step portion have the same height, and the second step portion is higher than the first step portion.

[0012] Preferably, a gasket is provided between the elastic element and the second step portion, and the sum of the thicknesses of the second step portion and the gasket is equal to the height of the first step portion.

[0013] Preferably, the cover body has a third notch at the position corresponding to the second step, and the free end face of the third notch is flush with the surface of the second step.

[0014] Preferably, the internal power terminal is sandwiched between the coil and the cover plate.

[0015] Compared with the prior art, this utility model provides a linear vibration motor with a simple structure. This vibration motor adapts the edge of the cover to the shape of the shell, thereby ensuring the welding stability of the shell and the cover and ensuring the vibration performance of the vibration motor. Attached Figure Description

[0016] Figure 1 This is a perspective view of the linear vibration motor according to the first embodiment.

[0017] Figure 2 This is a perspective view of the housing according to the first embodiment.

[0018] Figure 3 This is an exploded view of the linear vibration motor structure according to the first embodiment.

[0019] Figure 4 This is a YZ-direction cross-sectional view of the linear vibration motor of the first embodiment.

[0020] Figure 5 This is a cross-sectional view of the linear vibration motor in the XZ direction according to the first embodiment.

[0021] Figure 6 This is a cross-sectional view of the linear vibration motor in the XZ direction according to the second embodiment.

[0022] in:

[0023] 1-Shell; 10-Main body; 11-First step; 12-Second step; 13-Third step;

[0024] 110 - First Gap;

[0025] 2-Cap; 20-Second notch; 21-Third notch;

[0026] 3-Stator assembly; 30-Flexible circuit board; 31-Coil; 301-Internal connection terminal; 302-External connection terminal;

[0027] 4-Oscillator assembly;

[0028] 5 - Elastic element; 50 - Gasket. Detailed Implementation

[0029] 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.

[0030] The structure of a linear vibration motor according to the first embodiment of this utility model is as follows: Figures 1 to 5As shown, the device includes a rectangular shell 1 with one open end, a cover 2, a stator assembly 3, an oscillator assembly 4, and an elastic element 5. The shell 1 and the cover 2 are fastened together to form an accommodating space (not shown). The shell 1 includes a bottom wall (not shown), two short side walls (not shown), and two long side walls (not shown). One long side wall includes a main part 10 and a first step part 11 lower than the main part 10. The free end edge of the long side wall of the first step part 11 is provided with a first notch 110. The cover 2 is plate-shaped. The stator assembly 3 is fixed on the cover 2. The stator assembly 3 includes a flexible circuit board 30 and a coil 31. The flexible circuit board 30 includes an internal power terminal 301 and an external power terminal 302. The internal power terminal 301 is located in the accommodating space and is sandwiched between the coil 31 and the cover 2 to insulate the coil 31 from the cover 2, thereby ensuring the vibration performance of the vibration motor. An external power terminal 302 extends from the first notch 110 into the accommodating space and is fixed to the outer surface of the first step portion 11. The height of the first step portion 11 is greater than or equal to the thickness of the external power terminal 302, ensuring that the flexible circuit board 30 does not protrude from the main body 10 and ensuring the space utilization of the vibration motor. The vibrator assembly 4 is connected to the housing 1 by fixing the elastic members 5 on both sides and is suspended in the accommodating space. The cover 2 is provided with a second notch 20 at the position between the first notch 110 and the short side wall. The second notch 20 is adapted to part of the free edge of the first step portion 11. Specifically, the free end face of the second notch 20 is flush with the outer surface of the first step portion 110 to facilitate the welding and fixing of the housing 1 and the cover 2. At the same time, the part of the cover 2 corresponding to the position from the first notch 110 to the main body 10 is at the same height as the main body 10, covering and protruding outside the first notch 110, thereby protecting the flexible circuit board 30.

[0031] The two long sidewalls of the housing 1 are also recessed at opposite corners, with a second step 12 and a third step 13 for connecting the elastic element 5. The second step 12 and the third step 13 serve as pre-positioning before the housing 1 is welded to the elastic element 5. The first step 11 and the second step 12 are located on both sides of the main body 10. The first step 11 and the second step 12 are at the same height to ensure that the vibration space on one side of the oscillator assembly 4 is consistent. The second step 12 is higher than the third step 13 to ensure that the other side of the oscillator assembly 4 has sufficient vibration space. The cover 2 is provided with a third notch 21 corresponding to the position of the second step 12. The third notch 21 is adapted to the free end edge of the second step 12. Specifically, the free end face of the third notch 21 is flush with the surface of the second step 12 to facilitate the welding and fixing of the housing 1 and the cover 2.

[0032] The structure of a linear vibration motor according to the second embodiment of this utility model is as follows: Figure 6As shown, as an alternative to the first embodiment, the second step 12 and the third step 13 are at the same height, which can prevent the housing 1 from deforming due to stamping and stretching. Therefore, in this embodiment, the second step 12 is higher than the first step 11. In order to ensure that the vibration space on one side of the oscillator assembly 4 is consistent, a shim 50 is provided between the elastic member 5 and the second step 12. The sum of the height of the second step 12 and the thickness of the shim 50 is equal to the height of the first step 11.

[0033] 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.

[0034] 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 with one open end, a cover, an oscillator assembly, a stator assembly, and elastic elements, wherein the housing and the cover are fastened together to form an accommodating space, the oscillator assembly is connected to the housing via the elastic elements fixing its two sides and suspended within the accommodating space, the stator assembly is fixed to the cover, 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, the internal power terminal being located within the accommodating space, characterized in that, The housing includes a bottom wall, two short side walls, and two long side walls. The long side wall includes a main part and a first stepped part lower than the main part. The free end edge of the long side wall of the first stepped part is provided with a first notch. The external power terminal extends out of the first notch into the accommodating space and is fixed to the outer surface of the first stepped part. The cover is provided with a second notch at the position between the first notch and the short side wall. The second notch is adapted to a portion of the free end edge of the first stepped part.

2. The linear vibration motor according to claim 1, characterized in that, The free end face of the second notch is flush with the outer surface of the first step.

3. The linear vibration motor according to claim 1, characterized in that, The height of the first step is greater than or equal to the thickness of the external electrical terminal.

4. The linear vibration motor according to claim 1, characterized in that, The two long sidewalls on both sides are recessed diagonally with a second step and a third step to connect the elastic element.

5. The linear vibration motor according to claim 4, characterized in that, The first step portion and the second step portion are at the same height, and the second step portion is higher than the third step portion.

6. The linear vibration motor according to claim 4, characterized in that, The second step portion has the same height as the third step portion, and the second step portion is higher than the first step portion.

7. The linear vibration motor according to claim 6, characterized in that, A gasket is provided between the elastic element and the second step portion, and the sum of the thicknesses of the second step portion and the gasket is equal to the height of the first step portion.

8. The linear vibration motor according to claim 5 or 6, characterized in that, The cover body has a third notch at the position corresponding to the second step, and the free end face of the third notch is flush with the surface of the second step.

9. The linear vibration motor according to claim 1, characterized in that, The internal electrical terminal is sandwiched between the coil and the cover plate.

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