Horizontal linear vibration motor

Abstract

The utility model relates to the technical field of vibration motors, and discloses a horizontal linear vibration motor, which comprises a square shell with an opening at one end, a plate-shaped cover body, a vibrator assembly, a pole piece, a stator assembly, a V-shaped elastic piece and a damping piece, the vibrator assembly is connected with two sides of the vibrator assembly through the elastic piece and is suspended in the shell, the stator assembly is fixed on the inner surface of the cover body, and the V-shaped elastic piece is fixed on the inner surface of the cover body. The shell and the cover body are buckled to form a containing space, the vibrator assembly and the stator assembly are vertically arranged in the containing space in a spaced mode, the vibrator assembly comprises a mass block and a magnetic assembly which are integrally cuboid, a mounting groove is formed in the center of the mass block in a penetrating mode to embed the magnetic assembly, and a first receding groove is concavely formed in the surface of the side, facing the shell, of the mass block to be matched with a pole piece; the surface of one side, facing the cover body, of the mass block is concavely provided with a second abdicating groove to abdicate the stator assembly, opposite angle side walls on the two sides of the short edge of the mass block are symmetrically connected with elastic pieces, and the other opposite angle extends along the two sides of the long edge of the mass block to form a first boss. The vibration motor is strong in vibration sense and high in reliability.

Description

Technical Field

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

[0002] With the development of electronic technology, portable consumer electronics products have gradually occupied the global consumer market and are becoming increasingly thinner, such as mobile phones, handheld game consoles, and multimedia entertainment devices. Linear motors are gradually becoming more common in electronic devices, replacing traditional rotor motors to provide tactile feedback, such as call notifications on mobile phones and vibration feedback in game consoles. Linear motors generate vibration by electromagnetically driving an oscillator with a mass to reciprocate. However, in traditional linear motors, to meet the requirements of thinness, the thickness of the mass needs to be reduced, which correspondingly reduces the weight of the oscillator, resulting in a weakened vibration. Therefore, it is necessary to design a new type of linear vibration motor to change this situation. Utility Model Content

[0003] The purpose of this utility model is to provide a horizontal linear vibration motor with strong vibration sensing and high reliability. The specific technical solution is as follows:

[0004] A horizontal linear vibration motor includes a square housing with one open end, a plate-shaped cover, an oscillator assembly, pole pieces, a stator assembly, a V-shaped elastic element, and a damping element. The oscillator assembly is connected to both sides of the elastic element and suspended inside the housing. The stator assembly is fixed to the inner surface of the cover. The housing and the cover are fastened together to form an accommodating space. The oscillator assembly and the stator assembly are spaced vertically apart within the accommodating space. The oscillator assembly includes a rectangular mass block and a magnetic component. A mounting groove is provided through the center of the mass block to embed the magnetic component. A first clearance groove is recessed on one side of the mass block facing the housing to accommodate the pole pieces. A second clearance groove is recessed on one side of the mass block facing the cover to accommodate the stator assembly. The elastic element is symmetrically connected to one pair of corner sidewalls on both sides of the short side of the mass block, and the other pair of corners extends along both sides of the long side of the mass block to form a first boss.

[0005] Preferably, the vertical projected area of ​​the first clearance groove and the second clearance groove is greater than the area of ​​the mounting groove.

[0006] Preferably, the magnetic component includes a cuboid main magnet and an auxiliary magnet, wherein the main magnet is magnetized in the vertical direction and the auxiliary magnet is magnetized in the horizontal direction.

[0007] Preferably, the main magnet includes a central magnet and side magnets spaced apart on both sides of the central magnet, and there are two auxiliary magnets with opposite magnetization directions. The magnetization direction of the central magnet is opposite to that of the side magnets. The auxiliary magnets are respectively sandwiched between the central magnet and the side magnets.

[0008] Preferably, the length of the main magnet is greater than the length of the auxiliary magnet.

[0009] Preferably, the mounting groove is provided with a second protrusion corresponding to the two side walls of the auxiliary magnet.

[0010] Preferably, the upper and lower surfaces of the connection position between the mass block and the elastic element are recessed with welding portions.

[0011] Preferably, the short side walls of the mass block are provided with grooves to adapt to the damping element, and the damping element is located between the mass block and the elastic element.

[0012] Preferably, the stator assembly includes a flexible circuit board and coils.

[0013] Preferably, there are two coils with current flowing in opposite directions.

[0014] Compared with the prior art, the mass block structure of the horizontal linear vibration motor of this utility model increases the weight of the oscillator assembly while achieving a thinner profile. Under the same vibration sensation, the displacement of the oscillator assembly is reduced, resulting in smaller amplitude of stretching and compression of the elastic element, correspondingly lower stress during vibration, and longer lifespan, thereby helping to improve the reliability of the vibration motor. Attached Figure Description

[0015] Figure 1 This is an exploded view of the structure of a horizontal linear vibration motor.

[0016] Figure 2 This is a cross-sectional view of a horizontal linear vibration motor along its long side.

[0017] Figure 3 This is a structural diagram of the oscillator assembly.

[0018] in:

[0019] 1-Shell;

[0020] 2-Cap;

[0021] 3-Oscillator assembly; 30-Mass block; 31-Magnetic unit; 310-Main magnet; 311-Auxiliary magnet;

[0022] 3100 - Central magnet; 3101 - Edge magnet;

[0023] 300 - Mounting slot; 301 - First clearance slot; 302 - Second clearance slot; 303 - First boss;

[0024] 304 - Second protrusion; 305 - Groove; 306 - Welded part;

[0025] 4-Stator assembly; 40-Flexible circuit board; 41-Coil;

[0026] 5-Elastic element;

[0027] 6-Damping components;

[0028] 7-Electrode. 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 horizontal linear vibration motor according to this utility model is as follows: Figures 1 to 3 As shown, a horizontal linear vibration motor includes a square housing 1 with one open end, a plate-shaped cover 2, an oscillator assembly 3, a stator assembly 4, a V-shaped elastic element 5, a damping element 6, and pole pieces 7. The oscillator assembly 3 is connected to both sides by the elastic element 5 and suspended inside the housing 1. The stator assembly 4 is fixed to the inner surface of the cover 2. The damping element 6 is located between the oscillator assembly 3 and the elastic element 5. The pole pieces 7 are fixed to the oscillator assembly 3 and located between the housing 1 and the oscillator assembly. The housing 1 and the cover 2 are fastened together to form an accommodating space (not shown). The oscillator assembly 3 and the stator assembly 4 are placed vertically spaced within the accommodating space. The stator assembly 4 includes a flexible circuit board 40 and coils 41, wherein there are two coils 41 with opposite current directions.

[0031] The oscillator assembly 3 includes a rectangular mass block 30 and a magnetic component 31. A mounting groove 300 is provided through the center of the mass block 30 to embed the magnetic component 31. A first clearance groove 301 is recessed on the surface of the mass block 30 facing the housing 1 to accommodate the pole piece 7. A second clearance groove 302 is recessed on the surface of the mass block 30 facing the cover 2 to allow space for the stator assembly 4. The magnetic component 31 and the coil 41 are arranged vertically and alternately. The pole piece 7 is made of magnetically conductive material and fully covers the magnetic component 31 to increase the magnetic field strength of the magnetic component 31. At the same time, the magnetic component 31 can be fixed in the vertical direction. Therefore, the vertical projection area of ​​the first clearance groove 301 is larger than the area of ​​the mounting groove 300. The second clearance groove 302 is used to provide vibration space for the oscillator assembly 3 to avoid the oscillator assembly 3 from hitting the coil 41 during reciprocating vibration. Therefore, the vertical projection area of ​​the second clearance groove 302 is larger than the area of ​​the mounting groove 300. A pair of corner sidewalls (not shown) on both sides of the short side of the mass block 30 are symmetrically connected to elastic members 5. The other pair of corners extend along both sides of the long side of the mass block 30 to form first bosses 303. There is a gap between the first bosses 303 and the sidewalls (not shown) of the housing 1 to provide vibration space for the oscillator assembly 3. There is a gap between the elastic members 5 and the first bosses 303, and they partially overlap in the horizontal direction, thereby saving installation space for the oscillator assembly 3 in the vibration direction. Second protrusions 304 are provided on the inner walls of both sides of the mounting groove 300 to fix the magnetic assembly 31. Meanwhile, the first bosses 303 and the second... The protrusion 304 effectively increases the weight of the mass block 30. The short side walls (not shown) of the mass block 30 are symmetrically provided with grooves 305 to accommodate the damping element 6. The damping element 6 is located between the mass block 30 and the elastic element 5 to prevent the vibrator assembly 3 from impacting the elastic element 5 during reciprocating vibration, which would affect the service life of the vibration motor and generate noise. The upper and lower surfaces of the connection position between the mass block 30 and the elastic element 5 are recessed with welding parts 306 for pre-positioning before welding the mass block 30 and the elastic element 5, ensuring precise welding and thereby improving the mechanical reliability of the vibration motor.

[0032] Magnetic component 31 includes a cuboid main magnet 310 and auxiliary magnets 311. The main magnet 310 includes a central magnet 3100 and side magnets 3101 spaced apart on both sides of the central magnet 3100. Two auxiliary magnets 311 are respectively sandwiched between the central magnet 3100 and the side magnets 3101. The length of the main magnet 310 is greater than the length of the auxiliary magnets 311. The main magnet 310 strengthens the magnetic field, while the auxiliary magnets 311 assist in magnetic conduction. The second protrusions 304 on both sides of the inner wall of the mounting groove 300 correspond to and are adapted to the auxiliary magnets 311. The main magnet 310 is magnetized vertically, and the magnetization direction of the central magnet 3100 is opposite to that of the side magnets 3101. The lengths of the central magnet 3100 and the side magnets 3101 are the same. Because the central magnet 3100 and the side magnets 3101 form closed magnetic circuits, the volume of the central magnet 3100 is larger than that of the two side magnets 3101. The volumes of the two auxiliary magnets 310 and 3101 are the same. The auxiliary magnets 311 are magnetized in the horizontal direction, and the magnetization directions of the two auxiliary magnets 311 are opposite. The length of the auxiliary magnets 311 is less than that of the main magnets 310, so that the volume of the auxiliary magnets 311 is smaller than that of the main magnets 310. They are symmetrically arranged with respect to the center line of the length direction of the central magnet 3100 (not shown) and the center line of the width direction of the main magnet 310 (not shown). This allows the auxiliary magnets 311 to balance the upper and lower magnetic attraction forces of the vibration motor. The second protrusion 304 has the same width as the auxiliary magnets 311. The second protrusion 304 is positioned in the length direction of the auxiliary magnets 311. At the same time, the second protrusion 304 plays a role in spacing the central magnet 3100 and the side magnets 3101 in the width direction. The magnetization direction indicated by the arrow in the attached figure is the N pole. The magnetic component 31 is a Heilbeck array magnetic circuit structure to greatly improve the effective magnetic field utilization rate. Driven by the dual coils 41, the vibration motor generates a strong vibration. The mass block 30 structure of the horizontal linear vibration motor of this utility model, while meeting the requirements of thinness, increases the weight of the vibrator assembly 3 by setting the first boss 303 and the second protrusion 304. Under the same vibration, the displacement of the vibrator assembly 3 is reduced, which makes the elastic element 5 subject to smaller amplitude of stretching and compression, and the stress during vibration is correspondingly smaller, resulting in a longer lifespan and thus improving the reliability of the vibration motor.

[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 horizontal linear vibration motor, comprising a square housing with one open end, a plate-shaped cover, an oscillator assembly, pole pieces, a stator assembly, a V-shaped elastic element, and a damping element, wherein the oscillator assembly is connected to its two sides via the elastic element and suspended within the housing, the stator assembly is fixed to the inner surface of the cover, the housing and the cover are fastened together to form an accommodating space, and the oscillator assembly and the stator assembly are vertically spaced within the accommodating space, characterized in that... The oscillator assembly includes a rectangular mass block and a magnetic component. A mounting groove is provided through the center of the mass block to embed the magnetic component. A first clearance groove is recessed on the surface of the mass block facing the housing to accommodate the pole piece. A second clearance groove is recessed on the surface of the mass block facing the cover to accommodate the stator assembly. The elastic element is symmetrically connected to one pair of corner sidewalls on both sides of the short side of the mass block, and the other pair of corners extends along both sides of the long side of the mass block to form a first boss.

2. The horizontal linear vibration motor according to claim 1, characterized in that, The vertical projected area of ​​the first and second clearance grooves is greater than the area of ​​the mounting groove.

3. The horizontal linear vibration motor according to claim 1, characterized in that, The magnetic component includes a cuboid main magnet and an auxiliary magnet, wherein the main magnet is magnetized in the vertical direction and the auxiliary magnet is magnetized in the horizontal direction.

4. The horizontal linear vibration motor according to claim 3, characterized in that, The main magnet includes a central magnet and side magnets spaced apart on both sides of the central magnet. There are two auxiliary magnets with opposite magnetization directions. The magnetization direction of the central magnet is opposite to that of the side magnets. The auxiliary magnets are respectively sandwiched between the central magnet and the side magnets.

5. The horizontal linear vibration motor according to claim 3, characterized in that, The length of the main magnet is greater than the length of the auxiliary magnet.

6. The horizontal linear vibration motor according to claim 5, characterized in that, The mounting groove is fitted with a second protrusion corresponding to the two side walls of the auxiliary magnet.

7. The horizontal linear vibration motor according to claim 1, characterized in that, The upper and lower surfaces of the connection point between the mass block and the elastic element are recessed with welding portions.

8. The horizontal linear vibration motor according to claim 1, characterized in that, The short side walls of the mass block are provided with grooves to fit the damping element, and the damping element is located between the mass block and the elastic element.

9. The horizontal linear vibration motor according to claim 1, characterized in that, The stator assembly includes a flexible circuit board and coils.

10. The horizontal linear vibration motor according to claim 9, characterized in that, There are two coils, and the current flows in opposite directions.

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