CN112260508A

CN112260508A - Linear vibrator and electronic equipment

Info

Publication number: CN112260508A
Application number: CN202011183976.9A
Authority: CN
Inventors: 阳政
Original assignee: Dongguan Hantes Electronic Technology Co ltd
Current assignee: Dongguan Hantes Electronic Technology Co ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-01-22
Anticipated expiration: 2040-10-29
Also published as: CN112260508B

Abstract

The invention relates to the technical field of electronics, and discloses a linear vibrator and electronic equipment. Linear vibrator includes vibration subassembly and shell fragment subassembly, and the vibration subassembly includes: the stator comprises a first permanent magnet and a second permanent magnet which are oppositely arranged at intervals, a magnetic field N area and a magnetic field S area of the first permanent magnet and the second permanent magnet are both 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 electrified and is arranged between the two permanent magnets; the circuit board is arranged on the electromagnet and is electrically connected with the electromagnet; the shell fragment subassembly includes: the bottom plate and have two bending pieces of two at least kink, two bending pieces are connected to the relative both sides limit of bottom plate respectively, and the three encloses and establishes and form a oscillator assembly space, and the oscillator is installed wherein. The invention prevents the two permanent magnets from being damaged due to collision, and ensures the vibration performance of the linear vibrator; the elastic sheet assembling difference and the individual difference are reduced to a greater extent, and the assembling 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 micro vibrator for tactile feedback is realized by mainly adopting a direct current motor to drive an eccentric wheel to rotate to generate vibration, and the service life of the traditional micro vibrator is limited by an electric brush because the direct current motor adopts electric brush for reversing, so that the traditional micro vibrator is difficult to break through 200 hours.

The prior micro brushless motor vibrator replaces a mode that a direct current motor drives an eccentric wheel to rotate to generate vibration, can solve the problem of service life, but is limited in application due to the phenomena of long starting time, slow 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 tactile feedback mode generated by the linear vibrator with the single resonance point cannot meet the requirement of diversified tactile feedback, and the vibrator with the double resonance points and the double directions has been generated in this context.

At present, the dual-resonance point and dual-direction linear vibrator used in the industry comprises a vibration component and a spring component.

As shown in fig. 1 and 2, the vibration assembly comprises a vibrator, a stator and a circuit board D, the stator is two fixed coils a, the vibrator is a permanent magnet B and a counterweight block C arranged between the two coils a, the circuit board D is electrically connected with the two coils a respectively, and the stator can drive the vibrator to perform reciprocating motion after being electrified.

When the vibrator generates over-vibration due to overlarge electrifying current of the stator, the vibration amplitude of the vibrator is overlarge, the permanent magnet B serving as the vibrator is easy to collide with other adjacent components, so that the permanent magnet B is broken and damaged, and finally the vibration performance of the linear vibrator is deteriorated or even loses efficacy.

As shown in fig. 3, according to the three-dimensional coordinate system shown in the figure, the elastic sheet assembly includes at least one set of elastic sheets E arranged in the X direction of the permanent magnet B and at least one set of elastic sheets E arranged in the Y direction of the permanent magnet B, each set of elastic sheets E includes two elastic sheets E respectively arranged on two sides of the permanent magnet B, and each elastic sheet E is independently installed on the outer side of the permanent magnet B. The linear vibrator realizes vibration in the X direction by utilizing the elastic sheet E in the X direction, and realizes vibration in the Y direction by utilizing the elastic sheet E in the Y direction.

The shrapnel component of this structure, because its each shrapnel E need independently process and independently install for often there are individual difference and equipment difference between the different shrapnel E, often can lead to linear vibrator's actual vibration performance and theoretical design requirement to appear the deviation from this, for example: designed resonance points or designed response bandwidth ranges cannot be achieved.

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 to cause the deterioration and even failure of vibration performance, and the deviation of actual vibration performance and theoretical design requirements is caused due to the difference among elastic sheets.

In order to achieve the purpose, the invention adopts the following technical scheme:

a linear vibrator, comprising: the vibration assembly and the elastic sheet 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 second permanent magnet are both divided along a diagonal line, 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 phase opposition manner, 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 phase opposition manner;

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 opposite to the first permanent magnet at an interval, and the other end of the electromagnet is arranged opposite to the second permanent magnet at an interval;

the circuit board is arranged on the electromagnet and is electrically connected with the electromagnet;

the shell fragment subassembly includes:

a base plate including opposing 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 arranged in an enclosing mode to form a vibrator assembling space matched with the vibrator;

the vibrator is arranged in the vibrator assembly space.

Optionally, the circuit board is of an S-shaped structure as a whole.

Optionally, the electromagnet includes an iron core and a coil wound around the iron core, and an insulating layer is further disposed 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 two ends of the iron core in the length direction are exposed to the outside relative to the coil.

Optionally, at least one end of the iron core in the length direction 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 wound on the body and then is electrically connected with the circuit board;

the body is provided with at least one positioning column, and the circuit board is provided with a positioning hole; the circuit board is matched with the positioning column through the positioning hole, so that the circuit board is fixed with the electromagnet in the relative position.

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 respectively comprise four sub-pieces and three bending parts; each of the panels includes opposing first and second side portions;

the first edge part of the first fragment is fixedly connected with the first side edge or the second side edge of the bottom plate, the second edge part of the ith fragment is fixedly connected with the first edge part of the (i + 1) th fragment through the (i + 1) th bending part, the second edge part of the (i + 1) th fragment is fixedly connected with the first edge part of the (i + 2) th fragment through the (i + 1) th bending part, so that two adjacent fragments form a preset included angle smaller than 90 degrees, and i is not less than 1 and not more than 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 hollow.

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

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

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

the first permanent magnet and the second permanent magnet are back to the outer sides of the vibrators and are respectively connected with a positioning plate.

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

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

1) according to the embodiment of the invention, the electromagnet is used as the vibrator, the two permanent magnets are used as the stator, and the two permanent magnets which are not in the vibration direction of the vibrator and are fixed in position during over-vibration do not collide with the vibrator or any other parts, so that the condition that the two permanent magnets are damaged due to collision is avoided, the quality of the two permanent magnets is effectively ensured, and the vibration performance of the linear vibrator is ensured.

2) The embodiment of the invention adopts the unconventional elastic sheet assembly which is formed by fixedly connecting two bending sheets, not only has elastic performance in two-dimensional direction and can assist the vibrator to realize reciprocating motion in two-dimensional direction, but also is integrally of a fixed combination structure and provides a vibrator assembly space, and is different from the traditional V-shaped elastic sheets which are separated from each other, so that the assembly difference and the individual difference of the elastic sheets are reduced to a greater extent, the vibration performance processing precision is effectively improved, and the assembly simplicity is also improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

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

fig. 2 is a schematic view illustrating connection between a stator and a circuit board of a conventional dual-resonance point dual-directional linear vibrator;

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

fig. 4 is an assembled perspective view of a linear vibrator provided in 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 with a casing removed;

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

fig. 7 is an exploded view of a vibration assembly of a linear vibrator provided in an embodiment of the present invention;

fig. 8 is a perspective view of a circuit board of a linear vibrator provided in an embodiment of the present invention;

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

fig. 10 is an exploded view of a casing of a linear vibrator provided in an embodiment of the present invention.

[ diagrammatic illustration ]

Coil A, permanent magnet B, balancing weight C, circuit board D, shell fragment E, vibration subassembly 1, shell fragment subassembly 2, shell 3, first permanent magnet 11, second permanent magnet 12, electro-magnet 13, circuit board 14, installed part 15, locating plate 16, iron core 131, coil 132, insulating layer 133, body 151, logical groove 152, reference column 153, bottom plate 21, first piece 22 of buckling, second piece 23 of buckling, oscillator assembly space 24, separation blade 25, burst 221, kink 222, connecting portion 223, shell 3: an upper shell 31 and a bottom shell 32.

Detailed Description

In order to make the embodiment of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without any creative efforts shall fall within the protection scope of the embodiments of the present invention.

In embodiments of the present 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 expressly listed, 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 the following explanations of related terms:

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

Bidirectional vibration: the vibration occurs in a two-dimensional direction (a one-dimensional direction of a straight line with respect to the vibration of a general linear vibrator), and the two-dimensional vibration can be decomposed into vibrations in two XY directions of a plane system, and is called bidirectional vibration.

A stator: one of the core components of the vibrator is fixed and does not generate relative displacement when vibrating.

Vibrator: one of the core components in which the vibrator operates is relatively displaced (vibrated) when vibrated, and the vibration causes the vibrator to exhibit a vibrating effect.

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

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

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

The stator comprises a first permanent magnet 11 and a second permanent magnet 12 which are oppositely arranged at 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 both divided along the diagonal line, 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 phase opposition manner, 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 phase opposition manner, so that a magnetic field is formed between the two permanent magnets.

A vibrator, specifically an 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 opposite to the first permanent magnet 11 at an interval, and the other end of the electromagnet is arranged opposite to the second permanent magnet 12 at an interval;

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 a 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. The bottom plate 21 is of a rectangular structure and comprises a first side edge and a second side edge which are opposite; a first bending piece 22 fixedly connected to the first side edge and having at least two bending portions 222; a second bending piece 23 fixedly connected to the second side edge and having at least two bending portions 222; the first bending piece 22, the bottom plate 21 and the second bending piece 23 are arranged in an enclosing manner 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 piece 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 at the inner position of the linear vibrator during over-vibration do not collide with the vibrator vibrating in the XY directions, and do not collide with any other parts, so that 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 elastic sheet assembly 2, the elastic sheet assembly 2 is formed by fixedly connecting two bending sheets, the elastic sheet assembly has elastic performance in two XY directions simultaneously, can assist the vibrator to realize reciprocating motion in the two XY directions, is a fixed combination structure and is provided with the vibrator assembly space 24, different from the traditional V-shaped elastic sheets which are separated from each other and shown in figure 3, the elastic sheet assembly difference and the individual difference are greatly reduced, and the assembly simplicity can be improved while the vibration performance processing precision is effectively improved.

For example, referring to fig. 7, in the vibration assembly 1, the electromagnet 13 serving as the vibrator includes an iron core 131 and a coil 132 wound around an outer periphery of the iron core 131, and an insulating layer 133 is further disposed 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, the larger the current is, the larger the vibration amplitude of the vibrator is, and the direction of the current changes, so that the vibration direction of the vibrator changes accordingly. The iron core 131 is used as a weight block to increase the weight of the vibrator and improve the vibration performance. And the insulating layer 133 is used for isolating the coil 132 from the iron core 131, so that the failure of vibration performance caused by the conduction of the coil 132 and the iron core 131 is avoided.

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 the length direction are exposed to the outside without being covered by the coil 132. The two ends of the iron core 131 exposed outside can be used for assembling and connecting the vibrator with other components.

Referring to fig. 6, the two exposed ends of the iron core 131 are respectively connected to 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 method such as riveting, welding, clamping, or bonding, as long as the two can be relatively fixed, which is not limited in the present invention. Of course, riveting and welding are preferred to ensure the tightness of the two and avoid the two from separating during long-term use.

Regarding the riveting manner, the present 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 of the iron core 131, and the exposed end of the iron core 131 is penetrated through the through groove 152 to rivet the iron core 131 with the mounting member 15.

This body 151 still has the reason line function simultaneously, and the link of coil 132 is connected with circuit board 14 electricity after winding body 151, can avoid the inside wire rod of linear vibrator to be mixed and disorderly like this, guarantees that inside is neat and orderly.

The body 151 is provided with at least one positioning column 153, and the circuit board 14 is provided with a positioning hole; the circuit board 14 is matched with the positioning hole and the positioning column 153 to realize the relative position fixing with the electromagnet 13. Of course, in order to ensure the fastening property, the circuit board 14 may be further fixed by soldering or the like with the body 151.

Based on the installed part of above-mentioned structure, not only can realize the reliable connection of circuit board 14 and oscillator, establish the basis for obtaining good vibration performance, can make putting of wire rod moreover well-arranged, be convenient for assembly and maintenance.

It will be appreciated that the specific configuration of the mounting member 15 is not limited to that shown in fig. 7, and that various other conventional configurations may be used to interconnect different objects. In another example, the use of the mounting member 15 can be omitted, and the circuit board 14 can be directly fixed and assembled on the exposed end of the iron core 131 of the electromagnet 13 by means of gluing or the like, so as to save cost.

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

In this embodiment, however, the number of electromagnets 13 as the vibrator is only one, and the circuit board 14 only needs to be electrically connected to one connection end of the electromagnet 13, so that the circuit board 14 can be fixedly mounted on any one of the two mounting members 15.

Meanwhile, when the vibrator vibrates, the circuit board 14 fixedly mounted on the vibrator can vibrate along with the vibrator, and because the circuit board 14 often has a certain length, the circuit board 14 can generate a restraining force opposite to the vibration direction on the vibrator in the vibration process, therefore, as shown in fig. 8, the circuit board 14 in the embodiment is integrally designed in an S-shaped structure and has a buffering effect, so that the restraining force generated by the circuit board 14 on the vibrator can be effectively reduced, and the adverse influence degree of the restraining force on the vibration performance is reduced.

In addition, the first permanent magnet 11 and the second permanent magnet 12 are respectively connected with a positioning plate 16 on the outer side facing away from the vibrator, and the positioning plates 16 are used for being connected with the shell 3 to realize the assembly of the stator and the shell 3.

For example, referring to fig. 9, in the elastic sheet 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 as to ensure that the elastic properties in the positive and negative directions on the X axis are the same, and obtain a good vibration sense. In fact, the two bending pieces can also adopt an asymmetric structural design to realize unconventional vibration induction meeting specific requirements; in the first bending piece 22 and the second bending piece 23, the bending angle of each bending portion 222 may be the same or different. The present invention is not limited thereto.

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

It should be noted that, the greater the number of the segments 221 and the bent portions 222 in the elastic sheet assembly 2, the more difficult it is to grasp the vibration performance of the linear vibrator, and the more easily the actual effect deviates from the theoretical design requirement; when the number of the segments 221 and the bent portions 222 in the elastic piece assembly 2 is too small, it is difficult to realize vibration in two dimensions, and a sufficient vibration effect cannot be obtained. Therefore, the present embodiment provides an example of a preferred design of two bending sheets with a symmetrical structure:

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

In short, the first bending piece 22 and the second bending piece 23 in this example are symmetrical M-shaped structures. On this basis, the present embodiment also provides the following reference design values for other numerical 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 piece 22 and the second bending piece 23 is 0.1mm, and two sub-pieces 221 in the middle of each bending piece are processed with rectangular hollow structures. Based on the elastic sheet component 2 designed by the above structure design and various parameters, the linear vibrator of the embodiment can realize the low-frequency resonance point 160HZ and the high-frequency resonance point 320 HZ.

In addition, the bottom plate 21 further includes a third side and a fourth side opposite to each other; the elastic piece 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, the two blocking pieces 25 disposed at an interval are formed at the front and rear ends of the vibrator assembling space 24, and are used for limiting the electromagnet 13 disposed in the vibrator assembling space 24 in the Z direction, so as to prevent the electromagnet 13 from coming out of the opening in the Z direction during the use of the linear vibrator.

Each blocking piece 25 is further provided with a rectangular hollow structure, when the electromagnet 13 is installed in the vibrator assembling space 24, the exposed two ends of the iron core 131 in the electromagnet 13 can penetrate through the hollow structures, riveting of the electromagnet 13 and the blocking pieces 25 is achieved, and assembling reliability is improved.

In order to facilitate the production of the elastic sheet component 2 and the assembly of the elastic sheet component 2 and the vibration component 1, the whole elastic sheet component 2 can be integrally formed by a metal sheet in a multi-stamping mode, and the elastic sheet component 2 manufactured in the way is of an integral structure and can be rapidly assembled with the vibration component 1, so that the assembly speed is greatly improved, and the assembly difference is reduced.

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

In summary, the assembly method of the linear vibrator includes: riveting two mounting pieces 15 at two ends of the vibrator, mounting a circuit board 14 on one mounting piece 15, and electrically connecting the connecting end of the vibrator with the circuit board 14; then, the vibrator assembled with the circuit board 14 is placed in a vibrator accommodating space provided by the elastic sheet component 2, and the vibrator is riveted with the elastic sheet component 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 sheet assembly 2 is assembled with the bottom shell 32 of the shell 3, and finally the assembly of the upper shell 31 and the shell 3 is completed.

Accordingly, 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 with N-level and S-level which are diagonally divided. Because the vibrator is positioned in the magnetic field formed by the stators on the two sides, the vibrator is subjected to an electromagnetic force F perpendicular to a magnetic field dividing line when the vibrator is electrified. Referring to the three-dimensional coordinate system shown in the figure, the electromagnetic force F generates two components Fx and Fy in the X direction and the Y direction, respectively, and the component Fx drives the vibrator to generate movement in the X direction (shown as the 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 (such as 160HZ) is adopted for driving, under the action of the component Fx, the elastic sheet component 2 generates resonance in the X direction, so that the synchronous conversion of kinetic energy and elastic potential energy is realized, further, the alternating reciprocating motion in the horizontal direction is realized, and the external appearance is dull vibration. At this time, the component Fy is not at the resonance point in the Y direction of the dome assembly 2, and thus does not exhibit a significant vibration.

When the high-frequency pulse current (such as 320HZ) is adopted for driving, under the action of the component Fy, the elastic sheet component 2 generates resonance in the Y direction, so that the synchronous conversion of kinetic energy and elastic potential energy is realized, further, the alternate reciprocating motion in the vertical direction is realized, and the vibration sense is sharp and crisp. At this time, the component Fx is not at the resonance point in the X-axis direction of the spring assembly 2, and thus does not exhibit a significant vibration.

When the low-frequency and high-frequency pulse current hybrid driving is adopted, a component Fx generated by the low-frequency pulse drives the vibrator to generate resonance in the X direction, a component Fy generated by the high-frequency pulse drives the vibrator to generate resonance in the Y direction, and the vibration inductance presented to the outside is between the high frequency and the low frequency. By changing the mixing ratio of the low-frequency and high-frequency drives, a variety of different vibration sensations can be obtained.

An embodiment of the present invention further provides an electronic device, including the linear vibrator as described above. It is understood that the electronic device may be any device that requires a vibratory sensation to be 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 gamepad, and the like.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A linear vibrator, characterized by comprising: the vibration component (1) and the elastic piece component (2);

the vibrating assembly (1) comprises:

the stator comprises a first permanent magnet (11) and a second permanent magnet (12) which are oppositely arranged at 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 a diagonal line, 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;

a vibrator which is an 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 opposite to the first permanent magnet (11) at an interval, and the other end of the electromagnet is arranged opposite to the second permanent magnet (12) at an interval;

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) including opposing 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 arranged in an enclosing manner to form a vibrator assembling space (24) matched with the vibrator;

the vibrator is arranged in the vibrator assembling space (24).

2. The linear vibrator according to claim 1, wherein the circuit board (14) has an S-shaped structure as a whole.

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

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

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

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

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

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

the body (151) is provided with at least one positioning column (153), and the circuit board (14) is provided with a positioning hole; the circuit board (14) is matched with the positioning hole and the positioning column (153) to realize the fixation of the relative position of the circuit board and the electromagnet (13).

6. The linear vibrator according to claim 1, wherein the first bending piece (22) and the second bending piece (23) are designed in a symmetrical structure with respect to the base plate (21);

the first bending sheet (22) and the second bending sheet (23) respectively comprise four separated sheets and three bending parts; each of the panels includes opposing first and second side portions;

the first edge part of the first fragment is fixedly connected with the first side edge or the second side edge of the bottom plate (21), the second edge part of the ith fragment is fixedly connected with the first edge part of the (i + 1) th fragment through the (i + 1) th bending part, and the second edge part of the (i + 1) th fragment is fixedly connected with the first edge part of the (i + 2) th fragment through the (i + 1) th bending part, so that two adjacent fragments form a preset included angle smaller than 90 degrees, and i is not less than 1 and not more than 2.

7. The linear vibrator according to claim 6, wherein 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 (22) and the second bending piece (23) is 0.1mm, and a hollow is formed on at least one of the pieces.

8. The linear vibrator according to claim 1, wherein the base plate (21) further comprises third and fourth opposing sides;

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

9. The linear vibrator according to claim 1, wherein the first bent piece (22) and the second bent piece (23), which are located at outer sides away from the vibrator-mounting space (24), are respectively provided with a connection portion for connecting with a casing (3) of the linear vibrator;

the first permanent magnet (11) and the second permanent magnet (12) are connected with a positioning plate (16) on the outer sides back to the vibrator respectively.

10. An electronic device characterized in that the electronic device comprises the linear vibrator according to any one of claims 1 to 9.