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 shell, a cover body, a vibrator assembly, a stator assembly and a springback assembly, the shell and the cover body are buckled to form an accommodating space, the vibrator assembly and the stator assembly are arranged in the accommodating space at an interval up and down, and the vibrator assembly comprises a mass block. The mass block comprises a cuboid body, a receding groove which is formed in the lower surface of the body and penetrates through the width direction of the body, bosses which are formed at the two ends of the body in the length direction through the receding groove and are symmetrical, and first step parts which are formed at the diagonal positions of the bosses and face one side of the long edge of the body. The rebound assembly comprises an elastic piece, the elastic piece comprises a mass block fixing part, the mass block fixing part is connected to the outer surface of the long edge side of the body on one side of the first step part, and the mass block fixing part, the receding groove and the lower end face of the first step part are flush. The structure of the vibration motor solves the problem of limit collision of the coil, and the mechanical reliability of the vibration motor is high.

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

[0003] The existing linear vibration motor usually has a horizontal linear vibration motor (not shown), which includes a shell with an open end, a cover, a vibrator assembly, a stator assembly and an elastic member. One end of the elastic member is connected to the diagonal two sides of the vibrator assembly, and the other end is connected to the inner wall of the shell, so that the vibrator assembly is suspended in the shell, and the stator assembly is fixed to the inner surface of the cover. The shell and the cover are buckled to form an accommodating space. The vibrator assembly and the stator assembly are placed in the accommodating space with upper and lower intervals. The stator assembly includes a flexible circuit board and a coil. Specifically, the flexible circuit board is bonded and fixed to the inner surface of the cover, and the coil is bonded and fixed on the flexible circuit board to form an electrical connection; the vibrator assembly includes a square mass block and a magnet embedded in the mass block. Specifically, one end of the elastic member is welded and fixed to the diagonal two sides of the mass block. The coil and the magnet are corresponding and spaced apart. Using the principle of electromagnetic induction, the coil is energized through the flexible circuit board of the stator assembly to generate a magnetic field, which drives the vibrator assembly equipped with the magnet to perform reciprocating motion. Among them, the structure of the existing mass block (not shown) is as follows Figure 7 As shown, in order to save the vertical installation space of the linear vibration motor in the electronic product, a recessed groove 1000 is provided on the surface of the mass block facing the coil along the reciprocating direction of the vibrator assembly to avoid the coil. The recessed groove 1000 forms symmetrical bosses 1100 on both sides to ensure the weight of the mass block, thereby meeting a greater vibration intensity. At the same time, the area of welding and fixing of the elastic part and the mass block can also be increased to enhance the connection strength of the vibrator assembly and the elastic part. As a result, a step 1200 is usually formed between the lower end surface of the welding position of the mass block and the elastic part and the surface of the recessed groove. During the reciprocating motion of the vibrator assembly, especially when the vibrator assembly is in an extreme motion state, the step 1200 on both sides of the mass block is prone to collide with the coil, easily generating noise, affecting the service life of the vibration motor, reducing the vibration performance, and failing to meet the mechanical reliability test of the horizontal linear vibration motor. Utility Model Content

[0004] The purpose of this utility model is to provide a horizontal linear vibration motor with high mechanical experimental reliability and good vibration performance. The specific technical solution is as follows:

[0005] The cam is secured to the chassis and has a camming element which is adapted to engage the camming element and to engage with the chassis to engage with the camming element.

[0006] Preferably, the elastic member also includes a U-shaped or V-shaped connecting portion, elastic arms extending in a trumpet shape from the free ends on both sides of the connecting portion, and a shell fixing portion and a mass block fixing portion that are bent in the same direction and extended from the free ends of the elastic arms and are parallel to each other; the length of the elastic arm on one side of the mass block fixing portion is greater than the length of the elastic arm on one side of the shell fixing portion; the upper end surfaces of the mass block fixing portion and the shell fixing portion are flush; the lower end surface of the mass block fixing portion is lower than the lower end surface of the shell fixing portion; the elastic members on both sides of the vibrator assembly are arranged in opposite directions.

[0007] Preferably, the rebound assembly further includes a first reinforcement sheet and a second reinforcement sheet; the first reinforcement sheet is fixedly provided on one side surface of the mass block fixing portion facing the shell fixing portion, and the second reinforcement sheets are fixedly provided on both side surfaces of the shell fixing portion.

[0008] Preferably, at least two first grooves are provided on the free end surface of either the mass block fixing portion and / or the first reinforcement sheet; at least two second grooves are provided on the free end surface of either the shell fixing portion and / or the second reinforcement sheet.

[0009] Preferably, the lower end surfaces of the first reinforcing sheet, the mass block fixing portion, the clearance groove and the first step portion are flush.

[0010] Preferably, the vibrator assembly further includes a permanent magnet, which is embedded in the body and located at the center of the clearance groove, and the permanent magnet is flush with the lower end surface of the clearance groove.

[0011] Preferably, the stator assembly includes a flexible circuit board and a coil, the flexible circuit board is fixedly mounted on the inner surface of the cover, the coil is fixedly mounted on the flexible circuit board, and the coil corresponds to the permanent magnet and is spaced apart.

[0012] Preferably, a long side surface of the body is symmetrically provided with lugs inclined toward one side edge of the shell; and a second step portion is provided on the other side of the boss relative to the first step portion toward the long side of the body.

[0013] Preferably, a first clearance gap is provided on one side edge of the elastic arm corresponding to the coil; and a second clearance gap is provided on one side edge of the elastic arm corresponding to the lug.

[0014] Preferably, the flexible circuit board is provided with an external power supply terminal extending out of the accommodating space, and the external power supply terminal extends out of the accommodating space through the second step portion.

[0015] Compared with the prior art, the structure of the horizontal linear vibration motor of the utility model solves the problem of collision between the vibrator assembly and the coil under extreme motion state, meets the mechanical reliability test of the vibration motor, and improves the vibration performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an exploded diagram of the structure of a horizontal linear vibration motor.

[0017] Figure 2 This is an assembly plan view of the vibrator assembly, rebound assembly and housing.

[0018] Figure 3 It is the structural exploded diagram of the rebound component.

[0019] Figure 4 is a side view of the elastic member.

[0020] Figure 5 This is the assembly structure diagram of the vibrator component and the rebound component.

[0021] Figure 6 This is a diagram of the misalignment between the vibrator assembly and the coil under extreme motion conditions.

[0022] Figure 7 It is a three-dimensional structural diagram of the existing mass block.

[0023] in:

[0024] 1- shell;

[0025] 2-cover;

[0026] 3-vibrator assembly; 30-mass block; 31-permanent magnet;

[0027] 300-body; 301-lug; 302-gap groove; 303-protrusion; 304-first step; 305-second step; 4-stator assembly; 40-flexible circuit board; 41-coil;

[0028] 5-Rebound component;

[0029] 50-elastic member; 500-connecting portion; 501-elastic arm; 502-mass block fixing portion; 503-shell fixing portion; 5010-first clearance gap; 5011-second clearance gap; 51-first reinforcement plate; 52-second reinforcement plate; 510-first groove; 520-second groove. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] The structure of a horizontal linear vibration motor of the utility model is as follows Figures 1 to 6 As shown, it includes a square housing 1 with one end open, a plate-shaped cover 2, a vibrator assembly 3 that is generally rectangular, a stator assembly 4, and a rebound assembly 5. The vibrator assembly 3 is connected on both sides by the rebound assembly 5 and is suspended within the housing 1. The stator assembly 4 is fixed to the inner surface of the cover 2. The housing 1 and the cover 2 are fastened together to form a storage space. The vibrator assembly 3 and the stator assembly 4 are placed in the storage space with a spacing therebetween. In the vibration motor of the present invention, the side facing the cover 2 is set as the bottom, and the side facing the housing 1 is set as the top. The X direction is the long side direction of the vibrator assembly 3, the Y direction is the short side direction of the vibrator assembly 3, and the Z direction is the height direction of the vibration motor. The rebound assembly 5 is connected to both sides of the long side of the vibrator assembly 3, so that the vibrator assembly 3 reciprocates along the short side direction.

[0032] The vibrator assembly 3 includes a rectangular mass block 30 and a permanent magnet 31 embedded in the mass block; the mass block 30 includes a rectangular body 300, a lug 301 arranged on the long side surface of the body 300 and tilted symmetrically toward the edge of one side of the shell 1, a clearance groove 302 arranged on the lower surface of the body 300 and running through its width direction, a boss 303 formed by the clearance groove 302 at both ends of the short side of the body 300 and symmetrical, and a first step portion 304 formed at the diagonal position of the boss 303 and facing one side of the long side of the body 300, and the boss 303 is provided with a second step portion 305 on the other side of the first step portion 304 toward the long side of the body, wherein the arrangement of the lug 301 and the boss 303 is to increase the weight of the mass block 30 and achieve a better vibration experience for consumers; the permanent magnet 31 is embedded in The main body 300 is located in the central position of the give way groove 302 to achieve the overall balance of the vibrator assembly 3 and ensure the vibration performance; the stator assembly 4 includes a flexible circuit board 40 and a coil 41. The flexible circuit board 40 is fixedly mounted on the inner surface of the cover body 2, and the coil 41 is fixedly mounted on the flexible circuit board 40. The flexible circuit board 40 is provided with an external power supply terminal (not marked) with an expenditure accommodating space. The external power supply terminal (not marked) extends the accommodating space through the second step portion 305 to connect to an external power supply to supply power to the coil 41; the coil 41 corresponds to the permanent magnet 31 and is arranged at intervals. Using the principle of electromagnetic induction, the flexible circuit board 40 of the stator assembly 40 is energized to the coil 41 to generate a magnetic field, which drives the vibrator assembly 3 equipped with the permanent magnet 31 to perform reciprocating motion, thereby generating vibration.

[0033] The structure of the rebound component 5 is as follows Figure 3 and Figure 4As shown, it includes an elastic member 50, a first reinforcement sheet 51 and a second reinforcement sheet 52; the elastic member 50 also includes a U-shaped or V-shaped connecting portion 500, elastic arms 501 extending in a trumpet shape from the free ends on both sides of the connecting portion 500, and a mass fixing portion 502 and a shell fixing portion 503 extending in the same direction and parallel to each other from the free ends of the elastic arms 501; the mass fixing portion 502 is connected to the outer surface of the long side of the body 300 on the side of the first step portion 304, and the shell fixing portion 503 is connected to the inner wall (not shown) of the shell 1; the mass fixing portion 502 is fixedly provided with a first reinforcement sheet 51 on one side surface of the shell fixing portion 503, and the two sides of the shell fixing portion 503 are fixed A second reinforcing sheet 52 is provided, and the first reinforcing sheet 51 and the second reinforcing sheet 52 are provided to strengthen the connection strength between the elastic member 50 and the mass block 30 and the shell 1 respectively; a first clearance notch 5010 is provided on one side edge of the elastic arm 501 corresponding to the coil 41; a second clearance notch 5011 is provided on one side edge of the elastic arm 501 corresponding to the lug 301, so as to prevent the elastic member 50 from colliding with the mass block 30 and the coil 41 during the reciprocating vibration of the vibrator assembly 3; wherein, the lower end surfaces of the mass block fixing portion 502, the first reinforcing sheet 51, the clearance groove 302, the permanent magnet 31 and the first step portion 304 are flush, so as to achieve the reciprocating vibration of the vibrator assembly 3, especially as Figure 6The vibrator assembly 3 and the coil 41 shown are in an extreme misalignment state, which can prevent the main body 300 of the mass block 30, the mass block fixing part 502 of the elastic member 50 and the first reinforcing plate 51 from colliding with the coil 41. As the internal space of electronic equipment becomes increasingly miniaturized, the structural optimization of the horizontal linear vibration motor of the present invention completely solves the problem of the vibrator assembly 3 colliding with the coil 41 in an extreme motion state, thereby ensuring the service life of the vibration motor, meeting the mechanical reliability test of the vibration motor, and improving the vibration performance; the elastic members 50 on both sides of the vibrator assembly 3 are arranged in opposite directions to ensure the balance of the vibrator assembly 3 during the reciprocating vibration process and ensure the vibration performance. Preferably, the length of the elastic arm 501 on the side of the mass block fixing part 502 is greater than the length of the elastic arm 501 on the side of the shell fixing part 503. The length of the elastic arm 501 on the side of the mass block fixing part 502 can ensure the rebound force of the elastic member 50, and the short elastic arm 501 on the side of the shell fixing part 503 allows the shell fixing part 503 to avoid the corner of the inner wall (not standard) of the shell 1; the upper end surfaces of the mass block fixing part 502 and the shell fixing part 503 are flush, and the lower end surface of the mass block fixing part 502 is lower than the lower end surface of the shell fixing part 503. The structural optimization of the elastic member 50 can not only ensure the elastic member 5 0 increases the contact area with the mass block 30 and the shell 1 respectively, ensures the connection strength, and can also solve the problem of collision between the elastic member 50 and the coil 41 in the extreme motion state of the vibrator assembly 3; at least two first grooves 510 are provided on the free end surface of either side of the mass block fixing part 502 and / or the first reinforcement plate 51, and at least two second grooves 520 are provided on the free end surface of either side of the shell fixing part 503 and / or the second reinforcement plate 52, which can increase the contact area between the elastic member 50 and the mass block 30 and the shell 1 respectively, ensure the connection strength, optimize the vibration performance, and let the user feel a high-quality vibration experience.

[0034] It should be noted that, in the description of the present invention, the terms "up", "down", "front", "back", "left", "horizontal direction", "vertical direction", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as a limitation on the present invention.

[0035] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A horizontal linear vibration motor, comprising a square housing with one end open, a plate-shaped cover, a vibrator assembly, a stator assembly, and a rebound assembly, wherein the vibrator assembly is connected at both sides by the rebound assembly and is suspended in the housing, the stator assembly is fixed to the inner surface of the cover, the housing and the cover are buckled to form an accommodating space, and the vibrator assembly and the stator assembly are spaced apart from each other in the accommodating space, characterized in that: The vibrator assembly includes a mass block, which includes a rectangular body, a clearance groove provided on the lower surface of the body and extending through the width direction thereof, symmetrical bosses formed by the clearance groove at both ends of the short side of the body, and a first step portion formed at a diagonal position of the boss and facing one side of the long side of the body; the rebound assembly includes an elastic member, which includes a mass block fixing portion, the mass block fixing portion is connected to the outer surface of the long side of the body on the side of the first step portion, and the lower end surface of the mass block fixing portion, the clearance groove and the first step portion are flush.

2. The horizontal linear vibration motor according to claim 1, characterized in that: The elastic part also includes a U-shaped or V-shaped connecting portion, elastic arms extending in a trumpet shape from the free ends on both sides of the connecting portion, and a shell fixing portion and a mass fixing portion that are bent and extended in the same direction from the free ends of the elastic arms and are parallel to each other; the length of the elastic arm on one side of the mass fixing portion is greater than the length of the elastic arm on one side of the shell fixing portion; the upper end surfaces of the mass fixing portion and the shell fixing portion are flush; the lower end surface of the mass fixing portion is lower than the lower end surface of the shell fixing portion; the elastic parts on both sides of the vibrator assembly are arranged in opposite directions.

3. The horizontal linear vibration motor according to claim 2, characterized in that: The rebound assembly further includes a first reinforcement sheet and a second reinforcement sheet; the first reinforcement sheet is fixedly provided on a side surface of the mass block fixing portion facing the shell fixing portion, and the second reinforcement sheets are fixedly provided on both side surfaces of the shell fixing portion.

4. The horizontal linear vibration motor according to claim 3, characterized in that: At least two first grooves are provided on the free end surface of either the mass block fixing portion and / or the first reinforcing sheet; at least two second grooves are provided on the free end surface of either the shell fixing portion and / or the second reinforcing sheet.

5. The horizontal linear vibration motor according to claim 4, characterized in that: The first reinforcing piece, the mass block fixing portion, the clearance groove and lower end surfaces of the first step portion are flush with each other.

6. The horizontal linear vibration motor according to claim 5, characterized in that: The vibrator assembly further includes a permanent magnet, which is embedded in the body and located at the center of the clearance groove. The permanent magnet is flush with the lower end surface of the clearance groove.

7. The horizontal linear vibration motor according to claim 6, characterized in that: The stator assembly includes a flexible circuit board and a coil. The flexible circuit board is fixedly mounted on the inner surface of the cover. The coil is fixedly mounted on the flexible circuit board. The coil corresponds to the permanent magnet and is spaced apart.

8. The horizontal linear vibration motor according to claim 7, characterized in that: The long side surface of the body is symmetrically provided with lugs inclined toward one side edge of the shell; the other side of the boss relative to the first step portion is provided with a second step portion toward the long side of the body.

9. The horizontal linear vibration motor according to claim 8, characterized in that: A first clearance gap is provided on one side edge of the elastic arm corresponding to the coil; and a second clearance gap is provided on one side edge of the elastic arm corresponding to the lug.

10. The horizontal linear vibration motor according to claim 8, characterized in that: The flexible circuit board is provided with an external power supply terminal extending out of the accommodating space, and the external power supply terminal extends out of the accommodating space through the second step portion.

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