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 mass block, magnetic steel and a damping piece, and is suspended in the shell through the elastic piece; the mass block comprises an integrally-formed cuboid body, the surface of the side, facing the cover plate, of the body is concavely provided with a receding coil and a groove penetrating through the body in the width direction, the center of the groove is provided with a square blind groove for containing the magnetic steel, and the blind groove forms the four walls of the mass block. The long side wall of the mass block is vertically and concavely arranged from the free end face of the mass block and penetrates through the long side wall to be used for installing a through groove of the damping piece, a first boss is horizontally and convexly arranged on the edge of the bottom of the long side wall, facing one side of the shell, of the body, and the groove forms a second boss on the free end face of the short side wall of the mass block. The performance of the horizontal linear vibration motor is improved, and the vibration effect of the motor is enhanced.

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 with permanent magnet steel to perform reciprocating cyclic motion. However, as electronic devices are becoming increasingly thin, there is an urgent need for a horizontal linear vibration motor that is easy to assemble and can provide a strong vibration feeling in the limited vibration motor accommodation space that these electronic devices can provide to meet the needs of the market and consumers. Utility Model Content

[0003] In order to overcome the problems of complex assembly and weak vibration sense of horizontal linear vibration motors in the prior art, the utility model proposes a novel horizontal linear vibration motor, which makes the assembly of the vibrator assembly convenient and achieves a strong vibration sense by improving the structure of the mass block. 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 a mass block, a magnetic steel and a damping member, the vibrator assembly is suspended in the shell by 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 snap together, the mass block comprises an integrally formed and rectangular body, a groove is recessed on a surface of the body facing one side of the cover plate to allow for the coil and penetrates the body in the width direction, a square blind groove for accommodating the magnetic steel is provided in the center of the groove, the blind groove forms the four walls of the mass block, the long side wall of the mass block is vertically recessed from its free end face and penetrates the long side wall to be used for installing a through groove of the damping member, a first boss is horizontally protruded on the bottom edge of the long side wall of the body facing the side of the shell corresponding to the position of the through groove, and the groove forms a second boss on the free end face of the short side wall of the mass block.

[0005] Furthermore, the elastic member is a U-shaped or V-shaped sheet as a whole, including a U-shaped or V-shaped connecting portion, elastic arms extending in the same direction from both sides of the connecting portion, and a mass block connecting end and a shell connecting end located at the free end of the elastic arm, the length of the elastic arm on the mass block connecting end is greater than the length of the elastic arm on the shell connecting end, and the opening directions of the elastic member connected to the two side surfaces of the long side wall are opposite.

[0006] Furthermore, the damping member is arranged corresponding to the elastic arm, and the damping member is symmetrically arranged at an oblique angle on the long side walls on both sides.

[0007] Furthermore, the long side walls on both sides of the first boss are symmetrically arranged at an oblique angle.

[0008] Furthermore, a first notch is concavely provided on a side of the elastic arm corresponding to the first boss, and a second notch is concavely provided on a side of the elastic arm corresponding to the coil.

[0009] Furthermore, a first blocking piece is arranged on one side of the mass block connection end toward the shell connection end, and a second blocking piece and a third blocking piece are arranged on both sides of the shell connection end respectively.

[0010] Furthermore, the main body has third bosses horizontally protruding on the surface positions on both sides of the long side wall where the mass block connection end is welded and fixed, and the mass block connection end corresponding to the second boss position has first recessed vertically on the upper and lower sides of the diagonal positions where it is welded to the main body.

[0011] Furthermore, glue receiving grooves are concavely arranged on the inner walls of the four corners of the blind groove.

[0012] Furthermore, the flexible circuit board includes an internal power connection terminal and an external power connection terminal extending from the internal power connection terminal to the housing, and the internal power connection terminal is provided with a first through hole and a second through hole at inner and outer sides corresponding to the coil, respectively.

[0013] Furthermore, the second boss is vertically recessed with a second accommodating portion corresponding to the position where the external power terminal extends.

[0014] The beneficial effects of the utility model are: through the integrally formed mass block, the components of the vibrator assembly are reduced, the arrangement of the first boss, the second boss and the third boss increases the volume and weight of the vibrator assembly to enhance the vibration effect of the motor, and the mass block passes through the through groove of the long side wall, which is conducive to the automated assembly of the damping part, thereby improving the performance of the horizontal linear vibration motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an exploded diagram of the structure of the horizontal linear vibration motor of the utility model.

[0016] Figure 2 It is a schematic diagram of the assembly structure of the stator assembly and the cover plate of the utility model.

[0017] Figure 3 It is a schematic diagram of the assembly structure of the vibrator component and the elastic member of the utility model.

[0018] Figure 4 yes Figure 3 Exploded diagram of the structure.

[0019] in:

[0020] 1- Shell;

[0021] 2-cover plate; 20-support part;

[0022] 3-stator assembly; 31-coil; 32-flexible circuit board;

[0023] 321 - internal power terminal; 322 - external power terminal; 323 - first through hole; 324 - second through hole;

[0024] 4-vibrator assembly; 40-mass block; 41-magnetic steel; 42-damping element; 401-body; 402-groove;

[0025] 403-blind groove; 404-long side wall; 405-short side wall; 406-first boss; 407-second boss;

[0026] 408 - third boss; 409 - through slot; 410 - first easing portion; 411 - second easing portion;

[0027] 412- glue containing groove;

[0028] 5-elastic member; 50-mass block connection end; 51-housing connection end; 52-connecting portion; 53-elastic arm;

[0029] 54-first notch; 55-second notch;

[0030] 6-first baffle; 7-second baffle; 8-third baffle. DETAILED DESCRIPTION

[0031] 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.

[0032] like Figures 1 to 4As shown, the utility model provides a horizontal linear vibration motor, including a square shell 1 with an accommodating space (not marked), a vibrator assembly 4, an elastic member 5, a stator assembly 3 and a cover plate 2, the vibrator assembly 4 includes an integrally formed mass block 40, a magnetic steel 41 and a damping member 42, the vibrator assembly 4 is suspended in the shell 1 through the elastic member 5, the stator assembly 3 includes a ring coil 31 and a flexible circuit board 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 be buckled 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 31 and the magnetic steel 41 are arranged at corresponding intervals, the coil 31 is energized through the flexible circuit board 32 to form a magnetic field, which drives the mass block 40 with the magnet 41 to realize the reciprocating motion of the vibrator assembly 4 under the action of the elastic member 5, thereby generating a vibration sense.

[0033] The structure of the mass block 40 is as follows: Figure 3 and 4 As shown, it includes a body 401 that is a rectangular parallelepiped as a whole. A groove 402 is recessed on the surface of the body 401 facing the cover plate 2 to allow the coil 31 to pass through the body 401 in the width direction. A square blind groove 403 is provided in the center of the groove 402 to accommodate the magnetic steel 41. The four corner inner walls of the blind groove 403 are recessed with glue accommodating grooves 412 to increase the glue capacity between the magnetic steel 41 and the inner wall of the blind groove 403 to ensure the bonding force between the magnetic steel 41 and the body 401. The blind groove 403 forms the four walls of the mass block 40. The long side wall 404 of the mass block 40 is vertically recessed from its free end surface and passes through the long side wall 404 for use A through slot 409 for installing the damping member 42, a first boss 406 is horizontally protruded from the bottom edge of the long side wall 404 of the main body 401 facing the side of the shell 1 corresponding to the position of the through slot 409, and the groove 402 forms a second boss 407 on the free end face of the short side wall 405; the one-piece molded mass block 40 can simplify the processing process, and the arrangement of the first boss 406 and the second boss 407 enables the vibrator assembly 4 to ensure the volume and weight of the mass block 40 within a limited installation space to enhance the vibration effect of the vibration motor, and the arrangement of the through slot 409 can realize the automatic mounting and fixing of the damping member 42, thereby improving production efficiency.

[0034] The structure of the elastic member 5 is as follows: Figure 3 and 4As shown, the whole is a U-shaped or V-shaped sheet arrangement, including a U-shaped or V-shaped connecting portion 52, elastic arms 53 extending in the same direction from both sides of the connecting portion 52, and a mass block connecting end 50 and a shell connecting end 51 located at the free end of the elastic arm 53; since the length of the shell 1 is greater than the length of the mass block 40, the length of the elastic arm 53 on one side of the mass block connecting end 50 in the utility model is greater than the length of the elastic arm 53 on one side of the shell connecting end; the opening directions of the elastic member 5 connected to the two side surfaces of the long side wall 404 are opposite, so that the elastic arms 53 of the mass block connecting end 50 and the shell connecting end 51 on both sides can be parallel to each other, thereby ensuring the balance of vibration; the damping member 42 is The elastic arm 53 should be set to prevent the elastic arm 53 from hitting the mass block 40 and deforming during the vibration process. Since the opening directions of the elastic member 5 are opposite, the damping member 42 is symmetrically arranged at an oblique angle on the long side walls 404 on both sides, and the first boss 406 is symmetrically arranged at an oblique angle on both sides of the long side walls 404, thereby ensuring the balance of vibration; the body 401 of the mass block 40 corresponds to the third boss 408 horizontally protruding from the surface position on both sides of the long side walls 404 welded and fixed to the mass block connection end 50. The raised third boss 408 is not only conducive to the pre-positioning of the third boss 408, but also convenient for the welding and fixing of the mass block connection end 50 and the mass block 40; the elastic arm 53 corresponds to the first A first notch 54 is concavely arranged on one side of the boss 406, and the first notch 54 plays a role of giving way to prevent the first boss 406 from hitting the elastic arm 53 during the reciprocating vibration of the vibrator assembly 4. A second notch 55 is concavely arranged on one side of the elastic arm 53 corresponding to the coil 31, and the second notch 55 also plays a role of giving way to prevent the coil 31 from hitting the elastic arm 53 during the reciprocating vibration of the vibrator assembly 4. At the same time, the first notch 54 and the second notch 55 on the upper and lower sides of the elastic arm 53 are both set to arc-shaped notches and are crescent-shaped, which can reduce the stress generated by the elastic member 5 during the deformation process, thereby increasing the service life of the elastic member 5. The mass block corresponding to the position of the second boss 407 is connected First easing portions 410 are vertically recessed on the upper and lower surfaces of the welding points where the end 50 is diagonally welded to the main body 401. The first easing portions 410 are located on the upper and lower surfaces of the third boss 408. The setting of the first easing portions 410 can make way for the welding points between the mass block connecting end 50 and the edge of the main body 401, thereby enhancing the binding force between the elastic member 5 and the mass block 4; a first baffle 6 is provided on the side of the mass block connecting end 50 facing the shell connecting end 51, and a second baffle 7 and a third baffle 8 are respectively provided on both sides of the shell connecting end 51. The setting of the first baffle 6, the second baffle 7 and the third baffle 8 is also to strengthen the binding force between the elastic member 5 and the mass block 4, thereby improving the stability of vibration.

[0035] The structure of the stator assembly 3 is as follows: Figure 2As shown, the flexible circuit board 32 is bonded and fixed on the inner surface of the cover plate 2, and the coil 31 is bonded and fixed on the flexible circuit board 32. The flexible circuit board 32 includes an internal power terminal 321 and an external power terminal 322 extending from the shell 1 from the internal power terminal 321. The internal power terminal 321 is electrically connected to the coil 31, and the external power terminal 322 extends from the motor shell 1 to connect to an external power source; the internal power terminal 321 is provided with a first through hole 323 and a second through hole 324 at the inner and outer sides corresponding to the coil 31, respectively. The setting of the first through hole 323 and the second through hole 324 can realize the integral glue bonding of the coil 31, the flexible circuit board 32 and the cover plate 2, and enhance the fixed bonding force between the stator assembly 3 and the cover plate 2; the second boss 407 is vertically recessed with a second accommodating portion 411 corresponding to the position where the flexible circuit board 32 is extended, so that the external power terminal 322 can smoothly extend from the shell in the limited vertical space of the vibration motor, and the cover plate 2 is parallelly extended with a support portion 20 to support the external power terminal 322 to achieve electrical connection with an external power source.

[0036] 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 a 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: The mass block includes an integrally formed rectangular body, a groove is recessed on the surface of the body facing the cover plate to allow for the coil and penetrates the body in the width direction, a square blind groove is provided in the center of the groove to accommodate the magnetic steel, the blind groove forms the four walls of the mass block, the long side wall of the mass block is vertically recessed from its free end face and penetrates the long side wall to be used for installing a through groove of the damping member, a first boss is horizontally protruded from the bottom edge of the long side wall of the body facing the shell side corresponding to the position of the through groove, and the groove forms a second boss on the free end face of the short side wall of the mass block.

2. A horizontal linear vibration motor according to claim 1, characterized in that: The elastic member is a U-shaped or V-shaped sheet as a whole, including a U-shaped or V-shaped connecting portion, elastic arms extending in the same direction from both sides of the connecting portion, and a mass block connecting end and a shell connecting end located at the free ends of the elastic arm. The length of the elastic arm on the mass block connecting end is greater than the length of the elastic arm on the shell connecting end, and the opening directions of the elastic member connected to the two side surfaces of the long side wall are opposite.

3. A horizontal linear vibration motor according to claim 2, characterized in that: The damping member is arranged corresponding to the elastic arm, and the damping member is symmetrically arranged at an oblique angle to the long side walls on both sides.

4. A horizontal linear vibration motor according to claim 3, characterized in that: The first boss is symmetrically arranged at an oblique angle on the long side walls on both sides.

5. A horizontal linear vibration motor according to claim 4, characterized in that: The elastic arm is provided with a first notch on one side corresponding to the first boss, and the elastic arm is provided with a second notch on one side corresponding to the coil.

6. A horizontal linear vibration motor according to claim 5, characterized in that: A first blocking piece is arranged on one side of the mass block connection end toward the shell connection end, and a second blocking piece and a third blocking piece are arranged on both sides of the shell connection end respectively.

7. A horizontal linear vibration motor according to claim 6, characterized in that: The main body is provided with third bosses horizontally on both sides of the long side wall surface where the mass block connection end is welded and fixed, and the mass block connection end is provided with first relief portions vertically on the upper and lower sides of the diagonal welding points where the mass block connection end is welded to the main body corresponding to the second boss position.

8. A horizontal linear vibration motor according to claim 7, characterized in that: The inner walls at the four corners of the blind groove are concavely provided with glue containing grooves.

9. A horizontal linear vibration motor according to claim 8, characterized in that: The flexible circuit board comprises an internal power connection terminal and an external power connection terminal extending from the internal power connection terminal to the housing, and the internal power connection terminal is provided with a first through hole and a second through hole at inner and outer sides corresponding to the coil, respectively.

10. A horizontal linear vibration motor according to claim 9, characterized in that: The second boss is vertically recessed with a second accommodating portion corresponding to the position where the external power terminal extends.

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