CN112260508B - Linear vibrator and electronic equipment - Google Patents

Abstract

The invention relates to the technical field of electronics, and discloses a linear vibrator and electronic equipment. The linear vibrator includes vibration subassembly and shell fragment subassembly, and vibration subassembly includes: the stator comprises a first permanent magnet and a second permanent magnet which are oppositely arranged at intervals, wherein a magnetic field N area and a magnetic field S area of the first permanent magnet and the second permanent magnet are respectively divided along a diagonal line, and the magnetic field N area and the magnetic field S area of the first permanent magnet and the second permanent magnet are oppositely arranged; the vibrator is powered and arranged between the two permanent magnets; the circuit board is arranged on the electromagnet and is connected with the electromagnet in a ferroelectric way; a dome assembly comprising: the base plate and two bending sheets with at least two bending parts are respectively connected to two opposite side edges of the base plate, and the base plate, the two bending sheets and the two bending sheets enclose to form a vibrator assembly space in which a vibrator is arranged. The invention avoids the situation that two permanent magnets are damaged due to collision, and ensures the vibration performance of the linear vibrator; the assembly difference and the individual difference of the elastic sheets are reduced to a greater extent, and the assembly simplicity can be improved while the vibration performance machining precision is effectively improved.

Description

Linear vibrator and electronic equipment

Technical Field

The present invention relates to the field of electronic technologies, and in particular, to a linear vibrator and an electronic device.

Background

The traditional miniature vibrator for tactile feedback is realized by adopting a direct current motor to drive the eccentric wheel to rotate to generate vibration, and the service life of the traditional miniature vibrator is limited by the electric brush and is difficult to break through for 200 hours because the direct current motor adopts the electric brush for reversing.

In the prior art, a miniature brushless motor vibrator replaces a mode that a direct current motor drives an eccentric wheel to rotate to generate vibration, so that the service life problem can be solved, but the application of the miniature brushless motor vibrator is limited due to the phenomena of longer starting time, slower response speed and feedback delay.

In addition, the linear vibrator developed by using the linear motor principle has only a single resonance point when vibrating, however, the haptic feedback mode generated by the single resonance point linear vibrator cannot meet the requirement of diversified haptic feedback, and a bi-directional vibrator with dual resonance points has been generated in this context.

Currently, dual-resonant-point bi-directional linear vibrators used in the industry comprise a vibrating assembly and a shrapnel assembly.

As shown in fig. 1 and 2, the vibration assembly includes a vibrator, a stator and a circuit board D, the stator includes two coils a with fixed positions, the vibrator includes a permanent magnet B and a balancing weight C disposed between the two coils a, the circuit board D is electrically connected with the two coils a, and the stator can drive the vibrator to reciprocate after being electrified.

In the vibration assembly with the structure, when the vibrator is excessively vibrated due to the overlarge current of the stator, the vibration amplitude of the vibrator is overlarge, so that the permanent magnet B serving as the vibrator is easy to collide with other adjacent components, the permanent magnet B is broken and damaged, and finally the vibration performance of the linear vibrator is deteriorated or even fails.

As shown in fig. 3, according to the three-dimensional coordinate system shown in the figure, the spring assembly includes at least one set of springs E disposed in the X direction of the permanent magnet B and at least one set of springs E disposed in the Y direction of the permanent magnet B, each set of springs E includes two springs E separately disposed on both sides of the permanent magnet B, and each spring E is independently mounted on the outer side of the permanent magnet B. The linear vibrator utilizes the elastic piece E in the X direction to realize the vibration in the X direction, and utilizes the elastic piece E in the Y direction to realize the vibration in the Y direction.

Because each elastic piece E of the elastic piece assembly needs to be independently processed and independently installed, individual differences and assembly differences often exist between different elastic pieces E, and deviation between actual vibration performance of the linear vibrator and theoretical design requirements is often caused, for example: the designed resonance point cannot be realized or the designed response bandwidth range cannot be realized.

Disclosure of Invention

The invention aims to provide a linear vibrator and electronic equipment, which solve the problems that in the prior art, a permanent magnet is easy to collide and damage during over-vibration, so that the vibration performance is deteriorated and even fails, and the actual vibration performance and theoretical design requirements are deviated due to the difference between elastic sheets.

To achieve the purpose, the invention adopts the following technical scheme:

a linear vibrator, comprising: a vibration assembly and a spring assembly;

The vibration assembly includes:

The stator comprises a first permanent magnet and a second permanent magnet which are oppositely arranged at intervals; the magnetic field N area and the magnetic field S area of the first permanent magnet and the magnetic field S area of the second permanent magnet are divided along diagonal lines, the magnetic field N area of the first permanent magnet and the magnetic field S area of the second permanent magnet are arranged in a positive opposite mode, and the magnetic field S area of the first permanent magnet and the magnetic field N area of the second permanent magnet are arranged in a positive opposite mode;

the vibrator is an electromagnet; the electromagnet is arranged between the first permanent magnet and the second permanent magnet and comprises two opposite ends, one end of the electromagnet is arranged at an opposite interval with the first permanent magnet, and the other end of the electromagnet is arranged at an opposite interval with the second permanent magnet;

The circuit board is arranged on the electromagnet and is in ferroelectric connection with the electromagnet;

The shell fragment subassembly includes:

a base plate including opposed first and second sides;

the first bending piece is fixedly connected with the first side edge and is provided with at least two bending parts;

The second bending piece is fixedly connected with the second side edge and is provided with at least two bending parts;

the first bending piece, the bottom plate and the second bending piece are surrounded to form a vibrator assembly space matched with the vibrator;

the vibrator is arranged in the vibrator assembly space.

Optionally, the whole circuit board is in an S-shaped structure.

Optionally, the electromagnet comprises an iron core and a coil wound on the periphery of the iron core, and an insulating layer is further arranged between the coil and the iron core;

The axial length of the coil is smaller than the length of the iron core in the axial direction of the coil, so that both ends of the iron core in the length direction are exposed outside the coil.

Optionally, at least one end in the length direction of the iron core is connected with a mounting piece, and the flexible circuit board is fixedly mounted on the electromagnet through the mounting piece.

Optionally, the mount comprises a body;

the body is provided with a through groove matched with the exposed end part of the iron core, and the exposed end part of the iron core is arranged in the through groove in a penetrating way;

the connecting end of the coil is electrically connected with the circuit board after being wound around the body;

The body is provided with at least one positioning column, and the circuit board is provided with a positioning hole; the circuit board realizes the relative position fixation with the electromagnet through the cooperation of the positioning hole and the positioning column.

Optionally, the first bending piece and the second bending piece are designed to be symmetrical with respect to the bottom plate;

The first bending piece and the second bending piece comprise four split pieces and three bending parts; each of the segments includes opposed first and second edges;

The first edge of the first piece is fixedly connected with the first side edge or the second side edge of the bottom plate, the second edge of the ith piece is fixedly connected with the first edge of the (i+1) th piece through the (i+1) th bending part, and the second edge of the (i+1) th piece is fixedly connected with the first edge of the (i+2) th piece through the (i+1) th bending part, so that two adjacent pieces form a preset included angle smaller than 90 degrees, and i is more than or equal to 1 and less than or equal to 2.

Optionally, the bending angle of the 1 st bending part and the 3 rd bending part is 6 degrees, the bending angle of the 2 nd bending part is 12 degrees, the thickness of the first bending piece and the second bending piece is 0.1mm, and at least one of the split pieces is provided with a hollowed-out part.

Optionally, the bottom plate further includes a third side and a fourth side opposite to each other;

the elastic piece assembly further comprises two baffle plates which are perpendicular to the bottom plate, wherein one baffle plate is fixedly connected with the third side edge, and the other baffle plate is fixedly connected with the fourth side edge.

Optionally, the first bending piece and the second bending piece are far away from the outer side of the vibrator assembly space, and are respectively provided with a connecting part for connecting with the housing of the linear vibrator;

And the first permanent magnet and the second permanent magnet are respectively connected with a positioning plate on the outer sides of the vibrators facing away from the vibrator.

An electronic device comprising a linear vibrator as claimed in any one of the above.

Compared with the prior art, the embodiment of the invention has the following beneficial effects:

1) In the embodiment of the invention, the electromagnet is used as the vibrator, the two permanent magnets are used as the stators, and the two permanent magnets which are not in the vibrating direction of the vibrator and are fixed in position during over vibration can not collide with the vibrator or any other part, so that the two permanent magnets are prevented from being damaged due to collision, the quality of the two permanent magnets is effectively ensured, and the vibrating performance of the linear vibrator is ensured.

2) The embodiment of the invention adopts the unconventional spring plate assembly, and the spring plate assembly is formed by fixedly connecting two bending sheets, not only has elastic performance in the two-dimensional direction, but also can assist the vibrator to realize reciprocating motion in the two-dimensional direction, and is integrally of a fixed combination structure and provided with vibrator assembly space, thus being different from a plurality of traditional V-shaped spring plates which are mutually separated, reducing the spring plate assembly difference and individual difference to a greater extent, and improving the assembly simplicity while effectively improving the vibration performance processing precision.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is an exploded view of a vibrating assembly of a conventional dual-resonant-point bi-directional linear vibrator;

FIG. 2 is a schematic diagram showing the connection between a stator and a circuit board of a conventional dual-resonant-point bi-directional linear vibrator;

FIG. 3 is an exploded view of a spring assembly of a conventional dual-resonant-point bi-directional linear vibrator;

fig. 4 is an assembled perspective view of a linear vibrator according to an embodiment of the present invention;

fig. 5 is an assembled perspective view of a linear vibrator provided in an embodiment of the present invention after a housing is removed;

fig. 6 is an assembled perspective view of a vibration assembly of a linear vibrator according to an embodiment of the present invention;

FIG. 7 is an exploded view of a vibration assembly of a linear vibrator according to an embodiment of the present invention;

Fig. 8 is a perspective view of a circuit board of a linear vibrator according to an embodiment of the present invention;

FIG. 9 is a perspective view of a spring assembly of a linear vibrator according to an embodiment of the present invention;

Fig. 10 is an exploded view of a housing of a linear vibrator according to an embodiment of the present invention.

[ Illustrated ]

Coil a, permanent magnet B, balancing weight C, circuit board D, elastic sheet E, vibration assembly 1, elastic sheet assembly 2, housing 3, first permanent magnet 11, second permanent magnet 12, electromagnet 13, circuit board 14, mount 15, positioning plate 16, iron core 131, coil 132, insulating layer 133, body 151, through groove 152, positioning column 153, bottom plate 21, first bending piece 22, second bending piece 23, vibrator assembly space 24, baffle 25, partition 221, bending portion 222, connecting portion 223, housing 3: upper case 31, bottom case 32.

Detailed Description

In order to make the embodiments of the present application better understood by those skilled in the art, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are intended to be within the scope of the embodiments of the present application.

In embodiments of the invention, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

For ease of understanding, the present invention provides an explanation of the relevant terms:

resonance point: refers to the situation that a physical system vibrates with larger amplitude than other frequencies under a specific frequency; these specific frequencies are called resonance (frequency) points. The dual resonance point is defined by two such specific resonance frequency points within the range of the frequency distribution.

Bi-directional vibration: the vibration occurs in two dimensions (one dimension of a straight line relative to the vibration of a normal linear vibrator), and this two-dimensional vibration can be decomposed into vibrations in two directions of XY of a planar system, and is called a bi-directional vibration.

And (3) a stator: one of the core components of the vibrator is fixed during vibration and does not generate relative displacement.

Vibrator: one of the core components of the vibrator operates, and a relative displacement (vibration) occurs when the vibrator vibrates, and the vibration causes the vibrator to exhibit a vibrating effect.

Flexible circuit board: a flexible circuit board (FPC, flexible Printed Circuit) that is bendable, referred to as a rigid circuit board.

Referring to fig. 4 to 9, an embodiment of the present invention provides a linear vibrator, which mainly includes a vibration assembly 1 and a spring assembly 2.

As shown in fig. 6 and 7, the vibrator assembly specifically includes a stator, a vibrator, and a circuit board 14.

A stator including a first permanent magnet 11 and a second permanent magnet 12 arranged at opposite intervals; the magnetic field N area and the magnetic field S area of the first permanent magnet 11 and the second permanent magnet 12 are divided along diagonal lines, the magnetic field N area of the first permanent magnet 11 and the magnetic field S area of the second permanent magnet 12 are arranged in a positive opposite mode, and the magnetic field S area of the first permanent magnet 11 and the magnetic field N area of the second permanent magnet 12 are arranged in a positive opposite mode, so that a magnetic field is formed between the two permanent magnets.

Vibrator, specifically electromagnet 13; the electromagnet 13 is arranged between the first permanent magnet 11 and the second permanent magnet 12, and comprises two opposite ends, one end of the electromagnet is arranged at an opposite interval with the first permanent magnet 11, and the other end of the electromagnet is arranged at an opposite interval with the second permanent magnet 12;

As shown in fig. 8, a circuit board 14, specifically, an FPC, is mounted on the vibrator and electrically connected to the vibrator for supplying a driving current to the vibrator. Under the action of current drive, the vibrator can generate reciprocating motion in the X direction and the Y direction in the magnetic field.

As shown in fig. 9, the spring assembly 2 includes: a bottom plate 21, a first bending piece 22 and a second bending piece 23. Wherein the bottom plate 21 has a rectangular structure and comprises a first side and a second side which are opposite; the first bending piece 22 is fixedly connected with the first side edge and is provided with at least two bending parts 222; the second bending piece 23 is fixedly connected with the second side edge and is provided with at least two bending parts 222; the first bending piece 22, the bottom plate 21 and the second bending piece 23 are surrounded to form a vibrator assembling space 24 matched with the vibrator; the vibrator of the vibrator assembly is arranged in the vibrator assembly space 24 provided by the elastic sheet assembly 2.

On one hand, in the embodiment of the invention, the electromagnet 13 is used as a vibrator, the permanent magnet is used as a stator, and the first permanent magnet 11 and the second permanent magnet 12 which are fixed in the Z direction of the vibrator are positioned in the linear vibrator during over vibration, so that the vibrator can not collide with the vibrator vibrating in the XY directions or collide with any other part, the situation that the first permanent magnet 11 and the second permanent magnet 12 are damaged due to collision is avoided, the quality of the first permanent magnet 11 and the second permanent magnet 12 is effectively ensured, and the vibration performance of the linear vibrator is ensured.

On the other hand, the embodiment of the invention adopts the unconventional spring piece assembly 2, and the spring piece assembly 2 is formed by fixedly connecting two bending pieces, so that the spring piece assembly not only has elastic performance in XY two directions, but also can assist the vibrator to realize reciprocating motion in XY two directions, and is of a fixed combination structure and provided with a vibrator assembly space 24, which is different from the traditional V-shaped spring pieces separated from each other shown in fig. 3, so that the spring piece assembly difference and individual difference are reduced to a greater extent, and the assembly simplicity is improved while the vibration performance processing precision is effectively improved.

For example, referring to fig. 7, in the vibration assembly 1, the electromagnet 13 as a vibrator includes an iron core 131 and a coil 132 wound around the outer periphery of the iron core 131, and an insulating layer 133 is further provided between the coil 132 and the iron core 131. The coil 132 is electrically connected to the circuit board 14, and the magnitude and direction of the driving current can be adjusted by an external pulse circuit on the circuit board 14, so that the larger the current is, the larger the vibration amplitude of the vibrator is, and the vibration direction of the vibrator is correspondingly changed when the current direction is changed. The iron core 131 serves as a weight to increase the weight of the vibrator and enhance vibration performance. And an insulating layer 133 for isolating the coil 132 from the core 131, and preventing failure of vibration performance due to conduction between the coil and the core.

The axial length of the coil 132 is smaller than the length of the core 131 in the axial direction of the coil 132, so that both ends of the core 131 in this length direction are exposed to the outside because they are not covered by the coil 132. The two ends of the iron core 131 exposed to the outside can be used for realizing the assembly connection of the vibrator and other components.

Referring to fig. 6, two exposed ends of the iron core 131 are respectively connected with a mounting member 15, and the circuit board 14 is fixedly mounted on the electromagnet 13 through any one of the mounting members 15.

The iron core 131 and the mounting member 15 may be connected by any means such as riveting, welding, fastening or bonding, so long as they can be fixed relatively, and the present invention is not limited thereto. Of course, in order to ensure the tightness of both, to avoid detachment of both during long-term use, riveting and welding are preferable.

For the riveting manner, this embodiment provides an example of the mounting member 15, as shown in fig. 7, including a body 151; the body 151 is provided with a through groove 152 matched with the exposed end part of the iron core 131, and the exposed end part of the iron core 131 is penetrated in the through groove 152 to realize riveting of the iron core 131 and the mounting piece 15.

The body 151 also has a wire arranging function, and the connecting end of the coil 132 is electrically connected with the circuit board 14 after being wound around the body 151, so that the wire inside the linear vibrator is prevented from being disordered, and the inside is ensured to be tidy and orderly.

At least one positioning column 153 is arranged on the body 151, and a positioning hole is formed in the circuit board 14; the circuit board 14 is matched with the positioning column 153 through the positioning hole, so that the relative position of the circuit board and the electromagnet 13 is fixed. Of course, the circuit board 14 may be further fixed by welding with the body 151 or the like in order to secure the fastening property.

Based on the mounting piece of the structure, reliable connection of the circuit board 14 and the vibrator can be realized, a foundation is laid for obtaining good vibration performance, wires can be placed orderly, and assembly and maintenance are convenient.

It will be appreciated that the particular configuration of the mounting member 15 is not limited to that shown in fig. 7, and that other conventional various configurations capable of interconnecting different objects may be employed. In another example, the mounting member 15 may be omitted, and the circuit board 14 may be directly fixed to the exposed end of the iron core 131 of the electromagnet 13 by adhesion or the like, so as to save cost.

In the conventional structure shown in fig. 1, the permanent magnet is used as a vibrator, and two coils a on two sides of the permanent magnet are separately provided as stators, and at this time, the circuit board D needs to be connected with two separately provided coils a at the same time, and often the circuit board is in a conventional planar design, and two ends of the circuit board are electrically connected with the connection ends of the coils a on the corresponding ends respectively.

In the present embodiment, however, since only one electromagnet 13 is used as the vibrator, the circuit board 14 is only required to be electrically connected to one connection end of the electromagnet 13, and therefore, the circuit board 14 can be fixedly mounted on either one of the two mounting pieces 15.

Meanwhile, when the vibrator vibrates, the circuit board 14 fixedly mounted on the vibrator vibrates along with the vibrator, and as the circuit board 14 has a certain length, the circuit board 14 can generate a drag force opposite to the vibration direction on the vibrator in the vibration process, so as shown in fig. 8, the whole circuit board 14 is of an S-shaped structural design and has a buffering effect, thus the drag force of the circuit board 14 on the vibrator can be effectively reduced, and the adverse influence degree of the drag force on the vibration performance is reduced.

In addition, a positioning plate 16 is connected to the outer sides of the first permanent magnet 11 and the second permanent magnet 12 facing away from the vibrator, and the positioning plate 16 is to be connected to the housing 3, thereby assembling the stator and the housing 3.

For example, referring to fig. 9, in the spring assembly 2, the first bending piece 22 and the second bending piece 23 are designed to be symmetrical with respect to the bottom plate 21, so that the same elastic performance in the positive and negative directions on the X axis can be ensured, and a good vibration feeling can be obtained. In fact, the two bending sheets can also adopt an asymmetric structural design so as to realize unconventional vibration sense meeting specific requirements; the bending angle of each bending portion 222 may be the same or different in the first bending piece 22 and the second bending piece 23. The invention is not limited in any way.

The vibration performance parameters of the linear vibrator include a resonance point, a width of a responsive frequency, and the like, and the influencing factors thereof include: the thickness of the first bending piece 22/second bending piece 23, the bending angle of each bending portion 222, the specific structure and size of the first bending piece 22/second bending piece 23, and the like. Therefore, to obtain the required vibration performance, the values of the respective influencing factors need to be flexibly adjusted in cooperation according to the parameters thereof, so that the required effect can be finally exhibited. Of course, under different requirements, different vibration sensations can be obtained by adjusting the values of the influence factors.

It should be noted that, the more the number of the segments 221 and the bending portions 222 in the spring assembly 2 is designed, the more difficult it is to grasp the vibration performance of the linear vibrator, and the more the actual effect is likely to deviate from the theoretical design requirement; too few designs of the segments 221 and the bending parts 222 in the spring plate assembly 2 can hardly realize vibration in two-dimensional directions, and cannot obtain rich vibration effects. Therefore, this embodiment provides an example in which two bending sheets are designed in a symmetrical structure:

As shown in fig. 9, taking the first bending piece 22 as an example, it includes four divided pieces 221 and three bending portions 222; each segment 221 includes opposing first and second edges; wherein, the first edge of the first segment 221 is fixedly connected with the first side or the second side of the bottom plate 21, the second edge of the i-th segment 221 is fixedly connected with the first edge of the i+1th segment 221 through the i-th bending part 222, and the second edge of the i+1th segment 221 is fixedly connected with the first edge of the i+2th segment 221 through the i+1th bending part 222, so that two adjacent segments 221 form a preset included angle smaller than 90 degrees, i is greater than or equal to 1 and less than 2.

Briefly, the first bending piece 22 and the second bending piece 23 in this example are of symmetrical M-shaped configuration. On the basis, the embodiment also provides the following reference design values for other values: the bending angle of the 1 st bending part and the 3 rd bending part is 6 degrees, the bending angle of the 2 nd bending part is 12 degrees, the thickness of the first bending sheet 22 and the second bending sheet 23 is 0.1mm, and a rectangular hollow structure is processed on two middle fragments 221 of each bending sheet. Based on the above structural design and the spring plate assembly 2 designed by various parameters, the linear vibrator of the present embodiment can realize the low-frequency resonance point 160HZ and the high-frequency resonance point 320HZ.

In addition, the bottom panel 21 further includes opposite third and fourth sides; the spring assembly 2 further comprises two blocking pieces 25 perpendicular to the bottom plate 21, wherein one blocking piece 25 is fixedly connected with the third side edge of the bottom plate 21, and the other blocking piece 25 is fixedly connected with the fourth side edge of the bottom plate 21. In other words, two blocking pieces 25 are formed at the front and rear ends of the vibrator assembly space 24 and are used for limiting the electromagnet 13 in the vibrator assembly space 24 in the Z direction, so as to prevent the electromagnet 13 from falling out from the opening in the Z direction during the use of the linear vibrator.

Each baffle 25 is further provided with a rectangular hollow structure, when the electromagnet 13 is installed in the vibrator assembly space 24, the exposed two ends of the iron core 131 in the electromagnet 13 can be arranged in the hollow structure in a penetrating mode, riveting of the electromagnet 13 and the baffle 25 is achieved, and reliability of assembly is improved.

For the production of being convenient for shell fragment subassembly 2 and the equipment of shell fragment subassembly 2 and vibration subassembly 1, whole shell fragment subassembly 2 can adopt many times punching press mode integrated into one piece by a slice sheetmetal, and the shell fragment subassembly 2 of making like this is an organic whole structure, can assemble fast with vibration subassembly 1, has improved the equipment rate greatly, has reduced the equipment difference.

Referring to fig. 10, the linear vibrator of the present embodiment further includes a housing 3, and the housing 3 may be further divided into two parts, namely an upper case 31 and a bottom case 32, which are detachably connected. In order to facilitate the connection between the vibration assembly 1 and the elastic sheet assembly 2 and the housing 3, the outer sides of the first bending piece 22 and the second bending piece 23, which are far away from the vibrator assembly space 24, are respectively provided with a connection part 223 for connecting with the housing 3; a positioning plate 16 is connected to the outer sides of the first permanent magnet 11 and the second permanent magnet 12 facing away from the vibrator. The vibration assembly 1 and the elastic piece assembly 2 are accommodated in the accommodating space of the shell 3, the connecting parts 223 on the first bending piece 22 and the second bending piece 23 are respectively detachably connected with the bottom shell 32, and the positioning plate 16 connected with the first permanent magnet 11 and the second permanent magnet 12 is respectively detachably connected with the upper shell 31.

In summary, the assembly method of the linear vibrator comprises the following steps: two mounting pieces 15 are riveted at two ends of the vibrator, a circuit board 14 is assembled on one of the mounting pieces 15, and then the connecting end of the vibrator is electrically connected with the circuit board 14; placing the vibrator assembled with the circuit board 14 into a vibrator accommodating space provided by the spring piece assembly 2, and riveting the vibrator with the spring piece assembly 2, as shown in fig. 4 and 5; then, the outer sides of the first permanent magnet 11 and the second permanent magnet 12 are respectively connected with a positioning plate 16, the positioning plate 16 is assembled with the upper shell 31 of the shell 3, the elastic piece assembly 2 is assembled with the bottom shell 32 of the shell 3, and finally the upper shell 31 and the shell 3 are assembled.

Correspondingly, the vibration process of the linear vibrator is as follows:

the two stators of the vibrator assembly are oppositely arranged at intervals to form a magnetic field which is divided into N stages and S stages along diagonal directions. Since the vibrator is in the magnetic field formed by the stators at both sides, the vibrator receives an electromagnetic force F perpendicular to the magnetic field dividing line when energized. Referring to a three-dimensional coordinate system shown in the figure, electromagnetic force F generates two components Fx and Fy in the X direction and the Y direction respectively, and the component Fx drives a vibrator to generate movement in the X direction (horizontal direction in the figure); the component Fy drives the vibrator to move in the Y direction (shown as the horizontal direction in the figure).

When the low-frequency pulse current (160 HZ for example) is adopted for driving, under the action of the component Fx, the elastic sheet component 2 resonates in the X direction, synchronous conversion of kinetic energy and elastic potential energy is realized, and further, alternate reciprocating motion in the horizontal direction is realized, and the vibration feeling of the elastic sheet component is dull. At this time, the component Fy does not appear as a noticeable vibration feeling to the outside because it is not at the resonance point in the Y direction of the dome assembly 2.

When the high-frequency pulse current (such as 320 HZ) is adopted for driving, under the action of the component Fy, the elastic sheet component 2 resonates in the Y direction, synchronous conversion of kinetic energy and elastic potential energy is realized, and further alternate reciprocating motion in the vertical direction is realized, and the vibration feeling of sharp and crisp appearance is realized. At this time, the component Fx does not appear as a distinct vibration feeling to the outside because it is not at the resonance point in the X-axis direction of the spring assembly 2.

When the low-frequency and high-frequency pulse current mixed driving is adopted, the component Fx generated by the low-frequency pulse drives the vibrator to generate resonance in the X direction, the component Fy generated by the high-frequency pulse drives the vibrator to generate resonance in the Y direction, and the vibration sense displayed on the surface is between the high frequency and the low frequency. By varying the mixing ratio of the low-frequency and high-frequency drive, a variety of different vibration sensations can be obtained.

The embodiment of the invention also provides electronic equipment, which comprises the linear vibrator. It will be appreciated that the electronic device may be any device that requires a vibration sense provided by a linear vibrator, and is not limited to a cell phone, a television, a computer, a personal digital assistant, a multimedia player, a navigation system, a smart watch, a game pad, etc.

The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A linear vibrator, comprising: a vibration component (1) and a spring piece component (2);

The vibrating assembly (1) comprises:

A stator including a first permanent magnet (11) and a second permanent magnet (12) arranged at opposite intervals; the magnetic field N area and the magnetic field S area of the first permanent magnet (11) and the magnetic field S area of the second permanent magnet (12) are divided along diagonal lines, the magnetic field N area of the first permanent magnet (11) is arranged in positive opposition to the magnetic field S area of the second permanent magnet (12), and the magnetic field S area of the first permanent magnet (11) is arranged in positive opposition to the magnetic field N area of the second permanent magnet (12);

the vibrator is an electromagnet (13); the electromagnet (13) is arranged between the first permanent magnet (11) and the second permanent magnet (12) and comprises opposite two ends, one end of the electromagnet is arranged at an opposite interval with the first permanent magnet (11), and the other end of the electromagnet is arranged at an opposite interval with the second permanent magnet (12);

the circuit board (14) is arranged on the electromagnet (13) and is electrically connected with the electromagnet (13);

The shell fragment subassembly includes:

a base plate (21) comprising opposite first and second sides;

The first bending piece (22) is fixedly connected with the first side edge and is provided with at least two bending parts;

the second bending piece (23) is fixedly connected with the second side edge and is provided with at least two bending parts;

The first bending piece (22), the bottom plate (21) and the second bending piece (23) are surrounded to form a vibrator assembly space (24) matched with the vibrator;

The vibrator is installed in the vibrator assembly space (24).

2. Linear vibrator according to claim 1, characterized in that the circuit board (14) is of overall S-shaped construction.

3. The linear vibrator according to claim 1, wherein the electromagnet (13) comprises an iron core (131) and a coil (132) wound around the outer periphery of the iron core (131), and an insulating layer (133) is further provided between the coil (132) and the iron core (131);

the axial length of the coil (132) is smaller than the length of the iron core (131) along the axial direction of the coil (132), so that both ends of the iron core (131) in the length direction are exposed outside the coil (132).

4. A linear vibrator according to claim 3, characterized in that at least one end of the iron core (131) in the length direction is connected with a mounting member (15), and the circuit board (14) is fixedly mounted on the electromagnet (13) via the mounting member (15).

5. Linear vibrator according to claim 4, characterized in that the mounting (15) comprises a body (151);

The body (151) is provided with a through groove (152) matched with the exposed end part of the iron core (131), and the exposed end part of the iron core (131) is penetrated in the through groove (152);

the connecting end of the coil (132) is electrically connected with the circuit board (14) after being wound around the body (151);

At least one positioning column (153) is arranged on the body (151), and a positioning hole is formed in the circuit board (14); the circuit board (14) is matched with the positioning column (153) through the positioning hole, so that the relative position of the circuit board and the electromagnet (13) is fixed.

6. Linear vibrator according to claim 1, characterized in that the first bending piece (22) and the second bending piece (23) are of symmetrical design with respect to the base plate (21);

The first bending piece (22) and the second bending piece (23) comprise four pieces and three bending parts; each of the segments includes opposed first and second edges;

The first edge of the first segment is fixedly connected with the first side edge or the second side edge of the bottom plate (21), the second edge of the ith segment is fixedly connected with the first edge of the (i+1) th segment through the (i) th bending part, and the second edge of the (i+1) th segment is fixedly connected with the first edge of the (i+2) th segment through the (i+1) th bending part, so that two adjacent segments form a preset included angle smaller than 90 degrees, and i is more than or equal to 1 and less than 2.

7. The linear vibrator according to claim 6, wherein the bending angle of the 1 st bending portion and the 3 rd bending portion is 6 degrees, the bending angle of the 2 nd bending portion is 12 degrees, the thickness of the first bending piece (22) and the second bending piece (23) is 0.1mm, and at least one of the divided pieces is formed with a hollowed-out portion.

8. Linear vibrator according to claim 1, characterized in that the base plate (21) further comprises opposite third and fourth sides;

The elastic piece assembly (2) further comprises two baffle pieces (25) which are perpendicular to the bottom plate (21), one baffle piece (25) is fixedly connected with the third side edge, and the other baffle piece (25) is fixedly connected with the fourth side edge.

9. Linear vibrator according to claim 1, characterized in that the first bending piece (22) and the second bending piece (23), apart from the outside of the vibrator assembly space (24), are provided with connection parts for connection with the housing (3) of the linear vibrator, respectively;

a positioning plate (16) is respectively connected to the outer sides of the first permanent magnet (11) and the second permanent magnet (12) which are opposite to the vibrator.

10. An electronic device comprising a linear vibrator according to any one of claims 1 to 9.