Linear vibration exciter

Abstract

The invention relates to the technical field of vibration motors, and discloses a linear vibration exciter comprising a stator assembly comprising an iron core and a coil surrounding the periphery of the iron core; the vibrator assembly penetrates in the first direction to form a stator cavity, and the stator assembly is arranged in the stator cavity in a penetrating mode; the elastic piece is connected with the vibrator assembly, and the elastic piece is located on at least one side of the periphery of the vibrator assembly in the second direction; the elastic piece is suitable for driving the vibrator assembly to reciprocate relative to the stator assembly in the first direction. Wherein the second direction is not parallel to the first direction. According to the linear vibration exciter provided by the invention, the elastic piece is placed in the non-vibration direction, and the vibrator assembly does not need to avoid the elastic piece in the vibration direction, so that the space utilization rate of the vibrator assembly of the linear vibration exciter is large, and the quality of the vibrator assembly is superior to that of a linear vibration exciter with a spring arranged in the vibration direction; therefore, the vibrator assembly is large in mass and good in performance.

Description

Technical Field

[0001] The invention relates to the technical field of vibration motors, and in particular to a linear vibration exciter. Background Art

[0002] Haptic feedback devices are widely used in various consumer electronic products, such as mobile phones, tablets, etc., and are even used in automobiles and medical equipment. Devices with tactile feedback function generally use vibration motors as system feedback components, such as incoming call reminders on mobile phones, vibration feedback on game consoles, etc. Compared with rotor-type vibration exciters, linear vibration exciters have great advantages in vibration characteristics, response time, service life, noise control, etc.

[0003] In the related art, linear vibration exciters generally have two symmetrical springs arranged in the vibration direction. In this structural form, since the springs are designed in the vibration direction, the vibrator needs to avoid the spring structure, which greatly reduces the mass of the vibrator and thus affects the performance of the vibration exciter. Summary of the invention

[0004] In view of this, the present invention provides a linear vibration exciter to solve the problem that the spring design of the linear vibration exciter needs to avoid the spring structure in the vibration direction, thereby reducing the quality of the vibrator.

[0005] The present invention provides a linear vibration exciter, comprising:

[0006] A stator assembly, comprising an iron core and a coil surrounding the outer circumference of the iron core;

[0007] The vibrator assembly is penetrated along a first direction to form a stator cavity, and the stator assembly is arranged in the stator cavity;

[0008] An elastic member connected to the vibrator assembly, and the elastic member is located on at least one side of the outer periphery of the vibrator assembly along the second direction; the elastic member is suitable for driving the vibrator assembly to reciprocate relative to the stator assembly along the first direction;

[0009] The second direction is non-parallel to the first direction.

[0010] Beneficial effect: The linear vibration exciter provided by the embodiment of the present invention places the elastic part in the non-vibration direction, and the vibrator assembly does not need to avoid the elastic part in the vibration direction, so that the space utilization rate of the vibrator assembly of the linear vibration exciter is large, and the mass of the vibrator assembly will be better than that of the linear vibration exciter in which the spring is arranged in the vibration direction, so that the vibrator assembly has a large mass and good performance. At the same time, this embodiment adopts two annular magnetic steels for repulsive bonding, and the coil, iron core and yoke iron are located in the magnetic circuit area in the middle of the magnetic steel, which can make full use of the magnetic field and make the driving force of the linear vibration exciter large.

[0011] In an optional implementation, the second direction is perpendicular to the first direction.

[0012] In an optional embodiment, the vibrator assembly includes:

[0013] A mass block, wherein the mass block is penetrated along a first direction to form a mass block axial hole;

[0014] A magnetic steel is disposed in the axial hole of the mass block, and the magnetic steel surrounds the outer circumference of the stator assembly and is spaced apart from the stator assembly;

[0015] The pole piece is arranged in the axial hole of the mass block, surrounds the outer peripheral side of the stator assembly, and is spaced apart from the stator assembly.

[0016] In an optional embodiment, the magnetic steel includes a first magnetic steel and a second magnetic steel, the first magnetic steel and the second magnetic steel have opposite polarities, and the first magnetic steel and the second magnetic steel are respectively arranged on both sides of the pole piece along the first direction.

[0017] In an optional embodiment, the vibrator assembly further includes: a first gasket and a second gasket, which are respectively arranged on both sides of the mass block along the first direction to limit the movement of the first magnetic steel, the pole piece and the second magnetic steel relative to the mass block along the first direction.

[0018] Beneficial effect: One of the two gaskets is fixed to one side plane of the mass block along the first direction by laser welding, providing a support table and a glue storage table for the bonding of the magnetic steel assembly and the mass block. The other of the two gaskets can also be fixed to the other side plane of the mass block along the first direction by laser welding, and the magnetic steel assembly is framed by the upper and lower gaskets to ensure that the magnetic steel assembly is firmly bonded.

[0019] In an optional embodiment, the stator assembly includes: a mounting shaft, the iron core is sleeved on the outer peripheral side of the mounting shaft;

[0020] The yoke is disposed around the outer periphery of the iron core and is located on at least one side of the coil along the first direction.

[0021] In an optional embodiment, the yoke includes a first yoke and a second yoke, and the first yoke and the second yoke are respectively arranged on both sides of the coil along the first direction.

[0022] Beneficial effect: The linear vibration exciter of this embodiment adopts a magnetic circuit mode in which two annular magnetic steels are bonded together in a repulsive manner, and the coil, the iron core and the yoke are located in the middle position of the magnetic steel assembly along the first direction, which can make full use of the magnetic field so that the force of the vibrator assembly is balanced in all directions. The use of this magnetic circuit structure can make the driving force of the linear vibration exciter large and the vibration stable. In addition, the use of this magnetic circuit structure can make the linear vibration exciter of this embodiment start and stop quickly.

[0023] In an optional embodiment, the first yoke is recessed in at least a portion of the area perpendicular to the first direction to form an incoming line avoidance groove and an outgoing line avoidance groove, one of the incoming line avoidance groove and the outgoing line avoidance groove is arranged on a side of the first yoke close to the iron core, and the other is arranged on a side of the first yoke away from the iron core;

[0024] And / or, the second yoke is recessed in at least a portion of the area perpendicular to the first direction to form an incoming line avoidance groove and an outgoing line avoidance groove, one of the incoming line avoidance groove and the outgoing line avoidance groove is arranged on a side of the second yoke close to the iron core, and the other is arranged on a side of the second yoke away from the iron core;

[0025] The incoming wire avoidance groove is suitable for accommodating the incoming wire of the coil, and the outgoing wire avoidance groove is suitable for accommodating the outgoing wire of the coil.

[0026] Beneficial effect: Since the coil needs to be electrically connected to the circuit board, the inlet and outlet wires of the coil can be led out through the avoidance groove on the yoke iron to connect with the FPC. The coil and FPC circuit are connected by electronic spot welding to facilitate the power supply of subsequent products.

[0027] In an optional embodiment, the linear vibration exciter further includes:

[0028] The shell and the bottom bracket are enclosed together to form a receiving cavity, and the stator assembly, the vibrator assembly and the elastic member are at least partially located in the receiving cavity;

[0029] The circuit board is arranged in the accommodating cavity, and the circuit board is electrically connected to the coil.

[0030] In an optional embodiment, the vibrator assembly includes a mass block, and support ears are formed on both sides of the mass block extending along the second direction;

[0031] The elastic member comprises a first fixing portion, a second fixing portion and an elastic portion located between the first fixing portion and the second fixing portion; the first fixing portion is fixedly connected to the support ear, and the second fixing portion is fixedly connected to at least one of the shell and / or the bottom bracket.

[0032] Beneficial effect: Support ears are extended on both sides of the mass block along the second direction, and the first fixing part can be a plate-like structure that matches the shape of the supporting ears. Therefore, after the first fixing part is fixedly connected to the supporting ears, the first fixing part can occupy as little space in the first direction as possible, thereby ensuring the size of the mass block. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is an exploded schematic diagram of the linear vibration exciter of the present invention;

[0035] Figure 2 is a cross-sectional view of a linear vibration exciter of the present invention;

[0036] Figure 3 It is a schematic diagram of the assembly of the stator assembly, the bottom bracket and the circuit board of the present invention;

[0037] Figure 4 It is a schematic diagram of assembling the vibrator assembly and the elastic member of the present invention;

[0038] Figure 5 A schematic diagram of the linear vibration exciter of the present invention with the housing removed;

[0039] Figure 6 Schematic diagram of the elastic member of the present invention Figure 1 ;

[0040] Figure 7 Schematic diagram of the elastic member of the present invention Figure 2 ;

[0041] Figure 8 A schematic diagram of the shaft installation of the present invention;

[0042] Fig. 9 It is a schematic diagram of the yoke of the present invention.

[0043] Description of reference numerals:

[0044] 1. Shell; 2. Bottom bracket; 3. Circuit board;

[0045] 4. stator assembly; 41. mounting shaft; 411. first shaft shoulder positioning portion; 412. second shaft shoulder positioning portion; 42. iron core; 43. coil; 44. yoke; 441. first yoke; 442. second yoke; 443. inlet avoidance groove; 444. outlet avoidance groove;

[0046] 5. vibrator assembly; 501. stator cavity; 51. mass block; 511. support ear; 512. mass block shaft hole; 53. magnetic steel; 531. first magnetic steel; 532. second magnetic steel; 54. pole piece; 55. gasket; 551. first gasket; 552. second gasket;

[0047] 6. elastic member; 61. first fixing portion; 62. second fixing portion; 63. elastic portion; DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0049] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0050] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0052] Haptic feedback devices are widely used in various consumer electronic products. Devices with haptic feedback function generally use vibration motors as system feedback components, such as incoming call reminders on mobile phones, vibration feedback on game consoles, etc. Compared with rotor-type vibration exciters, linear vibration exciters have great advantages in vibration characteristics, response time, service life, noise control, etc.

[0053] When linear vibration exciters are used in electronic products such as mobile phones, the space is often relatively small, and there is not much overall space left for the linear vibration exciter. However, in related technologies, linear vibration exciters generally have two symmetrical springs arranged in the vibration direction. In this structural form, since the springs are designed in the vibration direction, the vibrator needs to avoid the spring structure, which further limits the mass of the vibrator, resulting in low performance of the linear vibration exciter.

[0054] The linear vibration exciter provided by an embodiment of the present invention places the elastic part 6 in the non-vibration direction, and the vibrator does not need to avoid the elastic part 6 in the vibration direction, so that the space utilization rate of the vibrator component 5 of the linear vibration exciter is large, and the mass of the vibrator component 5 will be better than that of the linear vibration exciter in which the spring is arranged in the vibration direction, so that the vibrator component 5 has a large mass and good performance. At the same time, this embodiment adopts two annular magnetic steels 53 that are repelled and bonded, and the coil 43, the iron core 42 and the yoke iron 44 are located in the magnetic circuit area in the middle of the magnetic steel 53, which can make full use of the magnetic field and make the driving force of the linear vibration exciter large.

[0055] Combine the following Figures 1 to 9 , describing an embodiment of the present invention.

[0056] According to an embodiment of the present invention, there is provided a linear vibration actuator, comprising:

[0057] The stator assembly 4 includes an iron core 42 and a coil 43 surrounding the outer circumference of the iron core 42;

[0058] The vibrator assembly 5 is penetrated along the first direction to form a stator cavity 501, and the stator assembly 4 is arranged in the stator cavity 501;

[0059] The elastic member 6 is connected to the vibrator assembly 5, and the elastic member 6 is located on at least one side of the outer periphery of the vibrator assembly 5 along the second direction; the elastic member 6 is suitable for driving the vibrator assembly 5 to reciprocate relative to the stator assembly 4 along the first direction;

[0060] The second direction is non-parallel to the first direction.

[0061] In some embodiments, the second direction is perpendicular to the first direction.

[0062] In this embodiment, in order to ensure balanced force, elastic members 6 are provided on both sides of the vibrator assembly 5 along the second direction. The stator cavity 501 is located at the center of the vibrator assembly 5 along the second direction, so that after the stator assembly 4 is inserted into the stator cavity 501, the force is more balanced.

[0063] In this embodiment, the first direction is the vibration direction of the vibrator assembly 5 .

[0064] The linear vibration exciter provided by an embodiment of the present invention places the elastic part 6 in the non-vibration direction, and the vibrator assembly 5 does not need to avoid the elastic part 6 in the vibration direction, so that the space utilization rate of the vibrator assembly 5 of the linear vibration exciter is large, and the mass of the vibrator assembly 5 will be better than that of the linear vibration exciter in which the spring is arranged in the vibration direction, so that the vibrator assembly 5 has a large mass and good performance. At the same time, this embodiment adopts two annular magnetic steels 53 that are repelled and bonded, and the coil 43, the iron core 42 and the yoke iron 44 are located in the magnetic circuit area in the middle of the magnetic steel 53, which can make full use of the magnetic field and make the driving force of the linear vibration exciter large.

[0065] In this embodiment, the elastic member 6 is symmetrically placed in the non-vibration direction.

[0066] In some embodiments, the linear vibration actuator further comprises:

[0067] The shell 1 and the bottom bracket 2 are enclosed together to form a receiving cavity, and the stator assembly 4, the vibrator assembly 5 and the elastic member 6 are at least partially located in the receiving cavity;

[0068] The circuit board 3 is disposed in the accommodating cavity, and the circuit board 3 is electrically connected to the coil 43 .

[0069] In this embodiment, the shell 1 and the bottom bracket 2 are fixed together by laser welding to form a shell structure, and the stator assembly 4, the vibrator assembly 5 and the elastic member 6 are all accommodated in a receiving cavity enclosed by the shell 1 and the bottom bracket 2.

[0070] The circuit board 3 may specifically be an FPC. In this embodiment, the circuit board 3 is disposed on a side of the bottom bracket 2 facing the accommodating cavity. The circuit board 3 may specifically be bonded to the bottom bracket 2 by adhesive.

[0071] In some embodiments, the vibrator assembly 5 includes:

[0072] A mass block 51, wherein the mass block 51 has a mass block axial hole 512 formed therethrough along a first direction;

[0073] The magnetic steel 53 is disposed in the mass block shaft hole 512, and the magnetic steel 53 surrounds the outer peripheral side of the stator assembly 4 and is spaced apart from the stator assembly 4;

[0074] The pole piece 54 is disposed in the mass block axial hole 512 , and the pole piece 54 surrounds the outer circumference of the stator assembly 4 and is spaced apart from the stator assembly 4 .

[0075] In this embodiment, the whole structure formed by the vibrator assembly 5 can be driven by the elastic member 6 to reciprocate relative to the stator assembly 4 along the first direction.

[0076] The magnetic steel 53 and the pole piece 54 are both surrounded by the outer circumference of the stator assembly 4 and are spaced apart from the stator assembly 4 , that is, the magnetic steel 53 and the pole piece 54 are both formed with through holes.

[0077] In this embodiment, the mass block axial hole 512 formed by penetrating the mass block 51 along the first direction is coaxially arranged with the stator cavity 501. By arranging the magnetic steel 53 and the pole piece 54 in the mass block axial hole 512, the through holes of the magnetic steel 53 and the pole piece 54 are jointly enclosed to form the stator cavity 501, so that the stator assembly 4 can be inserted into the stator cavity 501.

[0078] In some embodiments, the magnetic steel 53 includes a first magnetic steel 531 and a second magnetic steel 532 . The first magnetic steel 531 and the second magnetic steel 532 have opposite polarities and are disposed on both sides of the pole piece 54 along the first direction.

[0079] The first magnet 531, the pole piece 54 and the second magnet 532 are stacked in sequence along the first direction and bonded together by glue. Since the first magnet 531 and the second magnet 532 have opposite polarities, after the first magnet 531 and the second magnet 532 are respectively bonded to the two sides of the pole piece 54, the first magnet 531, the pole piece 54 and the second magnet 532 are combined together to form a magnet assembly to provide a driving magnetic field for the vibration motor.

[0080] In this embodiment, the first magnetic steel 531 , the pole piece 54 and the second magnetic steel 532 can be fixed by glue in the mass block axial hole 512 formed by penetrating the mass block 51 along the first direction.

[0081] In some embodiments, the vibrator assembly 5 also includes: a first gasket 551 and a second gasket 552, which are respectively arranged on both sides of the mass block 51 along the first direction to limit the movement of the first magnetic steel 531, the pole piece 54 and the second magnetic steel 532 relative to the mass block 51 along the first direction.

[0082] The first gasket 551 and the second gasket 552 may be collectively referred to as gaskets 55 .

[0083] One of the two gaskets 55 is fixed to one side plane of the mass block 51 along the first direction by laser welding, providing a support table and a glue storage table for the bonding of the magnetic steel assembly and the mass block 51. The other of the two gaskets 55 can also be fixed to the other side plane of the mass block 51 along the first direction by laser welding, and the magnetic steel assembly is framed by the upper and lower gaskets 55 to ensure that the magnetic steel assembly is firmly bonded.

[0084] In some embodiments, the stator assembly 4 includes: a mounting shaft 41, an iron core 42 sleeved on the outer circumference of the mounting shaft 41;

[0085] The yoke 44 is disposed around the outer circumference of the core 42 and is located on at least one side of the coil 43 along the first direction.

[0086] In this embodiment, the iron core 42 , the yoke 44 and the coil 43 may be bonded together by glue.

[0087] Combination Figure 8 As shown, a first shoulder positioning portion 411 is formed on one side of the mounting shaft 41 along the axial direction, and a second shoulder positioning portion 412 is formed on the other side.

[0088] Among them, a corresponding mounting hole is opened on the bottom bracket 2. The mounting shaft 41 is installed with the bottom bracket 2 by inserting the mounting shaft 41 into the mounting hole of the bottom bracket 2 and positioning it through the first shaft shoulder positioning portion 411. In order to ensure a secure fixation, the mounting shaft 41 and the bottom bracket 2 can be fixed together by laser welding.

[0089] In some embodiments, the yoke 44 includes a first yoke 441 and a second yoke 442 , and the first yoke 441 and the second yoke 442 are respectively disposed on two sides of the coil 43 along the first direction.

[0090] The iron core 42 is sleeved on the outer circumference of the mounting shaft 41 and abuts against the second shaft shoulder positioning portion 412 .

[0091] The second yoke 442 , the coil 43 and the first yoke 441 are all disposed around the outer periphery of the core 42 , and are sequentially installed on the core 42 along the first direction so that the second yoke 442 abuts against the second shoulder positioning portion 412 .

[0092] Through the positioning function of the second shoulder positioning portion 412, the height of the coil 43 is conveniently controlled in the middle of the magnetic steel assembly, that is, along the first direction, the pole piece 54 corresponds to the middle position of the coil 43. Thus, the force balance of the vibrator assembly 5 is ensured.

[0093] In the linear vibration exciter provided by the embodiment of the present invention, the position of the coil 43 is positioned by the shaft shoulder, ensuring that the coil 43 corresponds to the middle position of the magnetic steel assembly along the first direction. In addition, the mounting shaft 41 and the iron core 42 are positioned and fixed by the inner hole, and the mounting shaft 41 and the bottom bracket 2 are also positioned and fixed by the inner hole, which simplifies the assembly tooling, facilitates production and manufacturing, and ensures the accuracy of the position and size of the product.

[0094] In some embodiments, in combination Fig. 9As shown, the first yoke 441 is recessed in at least a portion of the area perpendicular to the first direction to form an incoming line avoidance groove 443 and an outgoing line avoidance groove 444, one of the incoming line avoidance groove 443 and the outgoing line avoidance groove 444 is arranged on a side of the first yoke 441 close to the iron core 42, and the other is arranged on a side of the first yoke 441 away from the iron core 42;

[0095] And / or, the second yoke 442 is recessed in at least a portion of the area perpendicular to the first direction to form an incoming line avoidance groove 443 and an outgoing line avoidance groove 444, one of the incoming line avoidance groove 443 and the outgoing line avoidance groove 444 is arranged on a side of the second yoke 442 close to the iron core 42, and the other is arranged on a side of the second yoke 442 away from the iron core 42;

[0096] The incoming wire avoidance groove 443 is suitable for accommodating the incoming wire of the coil 43 , and the outgoing wire avoidance groove 444 is suitable for accommodating the outgoing wire of the coil 43 .

[0097] In this embodiment, since the coil 43 needs to be electrically connected to the circuit board 3, the inlet and outlet wires of the coil 43 can be led out through the avoidance groove on the yoke iron so as to be connected to the FPC. The coil 43 and the FPC circuit are connected by electronic spot welding so as to power on the subsequent products.

[0098] In some embodiments, in combination Figure 4 , Figure 6 , Figure 7 As shown, the vibrator assembly 5 includes a mass block 51, and both sides of the mass block 51 along the second direction are extended to form support ears 511;

[0099] The elastic member 6 includes a first fixing portion 61, a second fixing portion 62 and an elastic portion 63 located between the first fixing portion 61 and the second fixing portion 62; the first fixing portion 61 is fixedly connected to the support ear 511, and the second fixing portion 62 is fixedly connected to at least one of the shell 1 and / or the bottom bracket 2.

[0100] Support ears 511 are extended on both sides of the mass block 51 along the second direction, and the first fixing portion 61 can be a plate-like structure that matches the shape of the support ears 511, so that after the first fixing portion 61 is fixedly connected to the support ears 511, the first fixing portion 61 can occupy as little space in the first direction as possible, thereby ensuring the size of the mass block 51.

[0101] The second fixing portion 62 may also be a plate-shaped structure, so as to be conveniently fixedly connected to the bottom bracket 2 , and the second fixing portion 62 may occupy as little space in the first direction as possible, thereby ensuring the size of the mass block 51 .

[0102] The first fixing portion 61 and the supporting ear 511 may be fixed by laser welding, and the second fixing portion 62 and at least one of the housing 1 and / or the bottom bracket 2 may be fixed by laser welding.

[0103] The elastic portion 63 located between the first fixing portion 61 and the second fixing portion 62 can be realized by simple bending.

[0104] In this embodiment, the pole piece 54 , the iron core 42 , and the yoke 44 are made of high magnetic permeability materials, such as SPCC, SUS430, etc.

[0105] The mounting shaft 41 may be made of a non-magnetic material, such as metal, or non-metal, such as plastic, aluminum, copper, etc.

[0106] In this embodiment, the material of the shell 1 can be magnetic or non-magnetic, preferably magnetic. The shell 1 can increase the electromagnetic driving force of the linear vibration exciter and also increase the electromagnetic damping of the linear vibration exciter by using magnetic material.

[0107] After the linear vibration exciter is powered on, it can be alternating current or pulsed current. Due to this specially designed electromagnetic structure, the vibrator component 5 is subjected to a driving force that changes periodically with the direction of the current. The elastic member 6 provides a restoring elastic force, supporting the vibrator component 5 to perform linear reciprocating motion under the action of the electromagnetic force.

[0108] The linear vibration exciter of this embodiment adopts a magnetic circuit mode in which two annular magnetic steels are bonded in a repulsive manner, and the coil 43, the iron core 42 and the yoke are located in the middle position of the magnetic steel assembly along the first direction, which can make full use of the magnetic field so that the force of the vibrator assembly 5 is balanced in all directions. The use of this magnetic circuit structure can make the driving force of the linear vibration exciter large and the vibration stable. In addition, the use of this magnetic circuit structure can make the linear vibration exciter of this embodiment start and stop quickly.

[0109] Obviously, the above embodiments are only examples for clear explanation, and are not intended to limit the implementation methods. Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the present invention.

Claims

1. A linear vibration exciter, characterized in that: include: A stator assembly (4) comprising an iron core (42) and a coil (43) surrounding the outer circumference of the iron core (42); The vibrator assembly (5) is penetrated along a first direction to form a stator cavity (501), and the stator assembly (4) is arranged in the stator cavity (501); an elastic member (6) connected to the vibrator assembly (5), and the elastic member (6) is located on at least one side of the outer periphery of the vibrator assembly (5) along the second direction; the elastic member (6) is suitable for driving the vibrator assembly (5) to reciprocate relative to the stator assembly (4) along the first direction; The second direction is non-parallel to the first direction.

2. The linear vibration exciter according to claim 1, characterized in that: The second direction is perpendicular to the first direction.

3. The linear vibration exciter according to claim 1, characterized in that: The vibrator assembly (5) comprises: A mass block (51), wherein the mass block (51) is penetrated along a first direction to form a mass block axial hole (512); A magnetic steel (53) is arranged in the axial hole (512) of the mass block, and the magnetic steel (53) surrounds the outer peripheral side of the stator assembly (4) and is arranged at a distance from the stator assembly (4); A pole piece (54) is arranged in the mass block axial hole (512), and the pole piece (54) surrounds the outer peripheral side of the stator assembly (4) and is arranged at a distance from the stator assembly (4).

4. The linear vibration exciter according to claim 3, characterized in that: The magnetic steel (53) comprises a first magnetic steel (531) and a second magnetic steel (532), wherein the first magnetic steel (531) and the second magnetic steel (532) have opposite polarities and are respectively arranged on two sides of the pole piece (54) along a first direction.

5. The linear vibration exciter according to claim 4, characterized in that: The vibrator assembly (5) further comprises: a first gasket (551) and a second gasket (552), wherein the first gasket (551) and the second gasket (552) are respectively arranged on both sides of the mass block (51) along a first direction to limit the movement of the first magnetic steel (531), the pole piece (54) and the second magnetic steel (532) relative to the mass block (51) along the first direction.

6. The linear vibration exciter according to claim 1, characterized in that: The stator assembly (4) comprises: a mounting shaft (41), the iron core (42) being sleeved on the outer circumference of the mounting shaft (41); The yoke (44) is disposed around the outer periphery of the iron core (42) and is located on at least one side of the coil (43) along a first direction.

7. The linear vibration exciter according to claim 6, characterized in that: The yoke (44) comprises a first yoke (441) and a second yoke (442), and the first yoke (441) and the second yoke (442) are respectively arranged on both sides of the coil (43) along a first direction.

8. The linear vibration exciter according to claim 7, characterized in that: The first yoke (441) is recessed in at least a portion of a region perpendicular to the first direction to form an incoming line avoidance groove (443) and an outgoing line avoidance groove (444); one of the incoming line avoidance groove (443) and the outgoing line avoidance groove (444) is arranged on a side of the first yoke (441) close to the iron core (42), and the other is arranged on a side of the first yoke (441) away from the iron core (42); And / or, the second yoke (442) is recessed in at least a portion of a region perpendicular to the first direction to form an incoming line avoidance groove (443) and an outgoing line avoidance groove (444), one of the incoming line avoidance groove (443) and the outgoing line avoidance groove (444) being arranged on a side of the second yoke (442) close to the iron core (42), and the other being arranged on a side of the second yoke (442) away from the iron core (42); The incoming wire avoidance groove (443) is suitable for accommodating an incoming wire of the coil (43), and the outgoing wire avoidance groove (444) is suitable for accommodating an outgoing wire of the coil (43).

9. The linear vibration exciter according to any one of claims 1 to 8, characterized in that: The linear vibration exciter also includes: A shell (1) and a bottom bracket (2), wherein the shell (1) and the bottom bracket (2) together enclose a receiving cavity, and the stator assembly (4), the vibrator assembly (5) and the elastic member (6) are at least partially located in the receiving cavity; A circuit board (3) is disposed in the accommodating cavity, and the circuit board (3) is electrically connected to the coil (43).

10. The linear vibration exciter according to claim 9, characterized in that: The vibrator assembly (5) comprises a mass block (51), and support ears (511) are formed by extending on both sides of the mass block (51) along the second direction; The elastic member (6) comprises a first fixing portion (61), a second fixing portion (62), and an elastic portion (63) located between the first fixing portion (61) and the second fixing portion (62); the first fixing portion (61) is fixedly connected to the supporting ear (511), and the second fixing portion (62) is fixedly connected to at least one of the shell (1) and / or the bottom bracket (2).

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