Horizontal linear vibration motor

Abstract

The utility model relates to the technical field of vibration motors, in particular to a horizontal linear vibration motor, which comprises a shell with an accommodating space, a vibrator assembly, an elastic piece, a stator assembly and a cover plate, and is characterized in that the vibrator assembly comprises a cuboid mass block, magnetic steel and a damping piece which are integrally formed, and is suspended in the shell through the elastic piece; the stator assembly comprises an annular coil and a flexible circuit board, the stator assembly is fixed to the cover plate, the shell is matched and buckled with the cover plate, bosses are horizontally and convexly arranged on the bottom edges of the long edges of the two sides, facing one side of the shell, of the two sides of the mass block, and metal anti-collision pieces are arranged at the positions, corresponding to the bosses, of the inner surface of the shell in a matched mode. According to the utility model, the anti-collision sheet is arranged at the position, corresponding to the boss of the mass block, on the inner surface of the shell, so that the risk that the shell is deformed due to impact of the boss of the mass block in the use process of the vibration motor, especially in mechanical tests such as a drop test of the vibration motor, is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration motors, in particular to a horizontal linear vibration motor. Background Art

[0002] Micro vibration motors are commonly found in smart electronic devices such as mobile phones and tablet computers, and are used to provide vibration feedback to consumers to alert them, such as incoming phone calls, game vibration alerts, etc. The horizontal linear vibration motors currently on the market are powered by the stator assembly, and the coils in the stator assembly form a magnetic field, which drives the vibrator assembly equipped with a mass block of magnetic steel to perform reciprocating cyclic motion. However, with the trend of increasingly thin electronic devices, in order to achieve a strong vibration sense in the limited accommodation space that such electronic devices can provide, a boss is usually provided in the vibration direction of the mass block to enhance the weight of the mass block. However, the boss is likely to cause the boss of the mass block to hit the outer shell during the reciprocating vibration of the vibrator assembly, causing the outer shell to deform, especially in mechanical tests such as drop tests to prevent the outer shell from being deformed by the impact of the mass block boss. Therefore, there is an urgent need for a horizontal linear vibration motor that is easy to assemble and can prevent the outer shell from being deformed due to the mass block boss to meet the needs of the market and consumers. Utility Model Content

[0003] The purpose of the utility model is to provide a new type of horizontal linear vibration motor, aiming to solve the problem of shell deformation caused by the mass block boss of the existing vibration motor. The specific technical solution is as follows:

[0004] A horizontal linear vibration motor comprises a shell with an accommodating space, a vibrator assembly, an elastic member, a stator assembly and a cover plate, wherein the vibrator assembly comprises an integrally formed rectangular parallelepiped mass block, a magnetic steel and a damping member, the vibrator assembly is suspended in the shell through the elastic member, the stator assembly comprises a ring coil and a flexible circuit board, the stator assembly is fixed on the cover plate, the shell and the cover plate are adapted to be buckled, bosses are horizontally protruded on both sides of the mass block toward the bottom edges of the long sides on both sides of one side of the shell, and a metal anti-collision sheet is adapted to be provided on the inner surface of the shell corresponding to the position of the boss.

[0005] Furthermore, the elastic member is configured to be in a "V" or "U" shape, including elastic arms inclined on both sides, the free ends of the elastic arms are respectively configured to be a mass block fixed end and a shell fixed end parallel to each other, an avoidance notch is provided on one side edge of the elastic arm corresponding to the boss, a first reinforcement plate and a second reinforcement plate are respectively provided on both side surfaces of the shell fixed end, a third reinforcement plate is provided on the outer side surface of the mass block fixed end, and the first reinforcement plate is located between the shell fixed end and the shell.

[0006] Furthermore, the anti-collision sheet and the first reinforcement sheet are integrally provided.

[0007] Furthermore, the anti-collision sheet and the first reinforcement sheet are arranged at intervals.

[0008] Furthermore, the thickness of the anti-collision sheet is smaller than the thickness of the first reinforcement sheet.

[0009] Furthermore, the vertical height of the anti-collision sheet is smaller than the height of the first reinforcement sheet.

[0010] Furthermore, a horizontal projection of the damping member on the housing does not overlap with the anti-collision sheet.

[0011] Furthermore, the anti-collision plate and the first reinforcement plate are both made of stainless steel.

[0012] The beneficial effect of the utility model is that by arranging a stainless steel anti-collision plate at a position corresponding to the mass block boss on the inner surface of the shell, the risk of the shell being deformed by the impact of the mass block boss during use of the vibration motor, especially in mechanical tests such as vibration motor drop tests, is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an exploded view of the vibration motor structure of the first embodiment of the present utility model.

[0014] Figure 2 It is a cross-sectional view of the vibration motor structure of the first embodiment of the utility model taken along the Z direction.

[0015] Figure 3 It is a cross-sectional view of the vibration motor structure along the Y direction according to the first embodiment of the present utility model.

[0016] Figure 4 It is the anti-collision sheet and the first reinforcement sheet which are integrally arranged in the first embodiment of the utility model.

[0017] Figure 5 It is a cross-sectional view of the vibration motor structure of the second embodiment of the present utility model taken along the Z direction.

[0018] in:

[0019] 1- Shell;

[0020] 2-cover plate;

[0021] 3-stator assembly; 31-flexible circuit board; 32-coil;

[0022] 4-vibrator assembly; 41-mass block; 42-magnetic steel; 43-boss; 44-damping element;

[0023] 5-elastic member; 50-mass block fixed end; 51-housing fixed end; 52-elastic arm; 53-notch; 6-first baffle; 6'-anti-collision plate; 7-second baffle; 8-third baffle. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] A horizontal linear vibration motor according to the first embodiment of the utility model is as follows Figures 1 to 4 As shown, it includes a square shell 1 with an accommodating space (not marked), a stator assembly 3, a vibrator assembly 4, an elastic member 5 and a cover plate 2, the vibrator assembly 4 includes an integrally formed mass block 41, a magnetic steel 42 and a damping member 44, the vibrator assembly 4 is suspended in the shell 1 through the elastic member 5, the stator assembly 3 includes a flexible circuit board 31 and a ring coil 32, the stator assembly 3 is fixed on the inner surface of the cover plate 2, the shell 1 and the cover plate 2 are adapted to form a horizontal linear vibration motor, the stator assembly 3 and the vibrator assembly 4 are arranged at intervals in the accommodating space, the coil 32 and the magnetic steel 42 are arranged at corresponding intervals, the coil 32 is energized by the flexible circuit board 31 to form a magnetic field, and the mass block 41 with the magnet 41 is driven to realize the reciprocating cyclic motion of the vibrator assembly 4 under the action of the elastic member 5, thereby generating a vibration sense, wherein X refers to the horizontal length direction, Y refers to the horizontal width direction, and Z refers to the vertical direction. The vibration direction of the vibration motor is the Y direction.

[0026] The mass block 41 is formed by integrally sintering alloy powder and is in the shape of a rectangular parallelepiped. A magnetic steel 42 is embedded in the center of the surface of the mass block 41 facing the coil 32. Bosses 43 are horizontally protruded from the bottom edges of the long sides of the mass block 41 facing the shell 1 to increase the weight of the mass block 41 so as to achieve a strong vibration sense. A damping member 44 is arranged below the boss 43 in the vertical direction. Preferably, the damping member 44 is made of elastic buffering material such as foam.

[0027] The elastic member 5 is in the form of a U-shaped or V-shaped sheet, including two inclined elastic arms 52, the free ends of which are respectively arranged as the mass block fixed end 50 and the shell fixed end 51 which are parallel to each other, and a relief notch 53 is arranged on one side edge of the elastic arm 52 corresponding to the boss 43, and the two side surfaces of the shell fixed end 51 are respectively arranged with a first reinforcing sheet 6 and a second reinforcing sheet 7, and the outer surface of the mass block fixed end 50 is arranged with a third reinforcing sheet 8, and the first reinforcing sheet 6 is located between the shell fixed end 51 and the shell 1, and the shapes of the first baffle 6, the second baffle 7 and the third baffle 8 are respectively adapted to the shell fixed end 51 and the mass block fixed end 50, and all of them are used to strengthen the welding bonding force between the elastic member 5 and the shell 1 and the mass block 4, respectively. The double reinforcement of the first baffle 6 and the second baffle 7 can prevent the shell 1 from being twisted and deformed due to welding stress. The thickness of the first baffle 6 is greater than the thickness of the second baffle 7 and the third baffle 8 to provide sufficient rebound space for the elastic arm 52 of the elastic member 5 close to the shell 1. The damping member 42 of the vibrator assembly 4 is arranged to correspond to the position of the elastic arm 52, so as to prevent the elastic arm 52 from directly colliding with the mass block 41, generating noise and causing the elastic member 5 to deform or break, thereby affecting the vibration performance.

[0028] An anti-collision piece 6' is adapted to be provided at the position corresponding to the boss 43 on the inner surface of the shell 1 to reduce the risk of deformation of the shell due to the impact of the mass block boss during the use of the vibration motor, especially in mechanical tests such as the vibration motor drop test, thereby improving the vibration performance; the anti-collision piece 6' is integrally arranged with the first reinforcement piece 6 and both are stamped from stainless steel to facilitate assembly. The thickness of the anti-collision piece 6' is less than that of the first reinforcement piece 6, and the horizontal projection of the damping member 44 on the shell 1 does not overlap with the anti-collision piece 6', thereby not affecting the Y-direction vibration space of the vibrator assembly 4; the anti-collision piece 6' is only used to prevent the boss 43 from hitting the shell 1, so the vertical height of the anti-collision piece 6' is less than the height of the first reinforcement piece 6 to save material.

[0029] A horizontal linear vibration motor according to the second embodiment of the utility model is as follows Figure 5 As shown, on the basis of the first embodiment, the anti-collision sheet 6 ′ and the first reinforcement sheet 6 are separately arranged at intervals, which saves more materials and thus saves costs.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A horizontal linear vibration motor, comprising a housing with an accommodating space, a vibrator assembly, an elastic member, a stator assembly and a cover plate, wherein the vibrator assembly comprises an integrally formed rectangular parallelepiped mass block, a magnetic steel and a damping member, the vibrator assembly is suspended in the housing through the elastic member, the stator assembly comprises a ring coil and a flexible circuit board, the stator assembly is fixed on the cover plate, the housing is adapted to be buckled with the cover plate, and is characterized in that: Bosses are horizontally protruded from the bottom edges of the long sides of both sides of the mass block facing one side of the shell, and metal anti-collision sheets are adapted to be arranged at positions corresponding to the bosses on the inner surface of the shell.

2. A horizontal linear vibration motor according to claim 1, characterized in that: The elastic member is configured to be in a "V" or "U" shape, including elastic arms inclined on both sides, the free ends of the elastic arms are respectively configured to be a mass block fixed end and a shell fixed end which are parallel to each other, an avoidance notch is provided on one side edge of the elastic arm corresponding to the boss, a first reinforcement sheet and a second reinforcement sheet are respectively provided on both side surfaces of the shell fixed end, a third reinforcement sheet is provided on the outer side surface of the mass block fixed end, and the first reinforcement sheet is located between the shell fixed end and the shell.

3. A horizontal linear vibration motor according to claim 2, characterized in that: The anti-collision sheet and the first reinforcement sheet are integrally provided.

4. A horizontal linear vibration motor according to claim 2, characterized in that: The anti-collision sheet and the first reinforcement sheet are spaced apart from each other.

5. A horizontal linear vibration motor according to claim 2, characterized in that: The thickness of the anti-collision sheet is smaller than the thickness of the first reinforcement sheet.

6. A horizontal linear vibration motor according to claim 5, characterized in that: The vertical height of the anti-collision sheet is smaller than the height of the first reinforcement sheet.

7. A horizontal linear vibration motor according to claim 6, characterized in that: The horizontal projection of the damping member on the housing does not overlap with the anti-collision sheet.

8. A horizontal linear vibration motor according to claim 7, characterized in that: The anti-collision sheet and the first reinforcement sheet are both made of stainless steel.

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