CN112260509A

CN112260509A - Be applied to linear vibrator's vibration subassembly and linear vibrator

Info

Publication number: CN112260509A
Application number: CN202011183990.9A
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

Abstract

The invention relates to the technical field of electronics, and discloses a vibration assembly applied to a linear vibrator and the linear vibrator. The vibration assembly includes: the stator comprises two permanent magnets which are oppositely arranged at intervals, magnetic field N areas and magnetic field S areas of the two permanent magnets are divided along a diagonal line, and the magnetic field N areas and the magnetic field S areas of the two permanent magnets are oppositely arranged; the oscillator is an electromagnet, is arranged between the two second permanent magnets and comprises two opposite ends, one end of the oscillator is arranged opposite to the first permanent magnet at intervals, and the other end of the oscillator is arranged opposite to the second permanent magnet at intervals; and the circuit board is arranged on the electromagnet and is electrically connected with the electromagnet. The two permanent magnets are used as the stators, so that the two permanent magnets which are not in the vibration direction of the vibrator and are fixed in position cannot collide with the vibrator or any other parts during over-vibration, the condition that the two permanent magnets are damaged due to collision is avoided, the quality of the two permanent magnets is effectively guaranteed, and the vibration performance of the linear vibrator is ensured.

Description

Be applied to linear vibrator's vibration subassembly and linear vibrator

Technical Field

The invention relates to the technical field of electronics, in particular to a vibration assembly applied to a linear vibrator and the linear vibrator.

Background

The traditional micro vibrator for tactile feedback is mostly realized by adopting a direct current motor to drive an eccentric wheel to rotate to generate vibration; because the direct current motor adopts the brush to commutate, the life of traditional miniature vibrator receives the restriction of brush, 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, a linear vibrator developed by using the principle of a linear motor has only a single resonance point when vibrating, but a tactile feedback mode generated by a vibrator with a single resonance point cannot meet the requirement of diversified tactile feedback, and a vibrator with two resonance points and two directions has been produced in the background.

At present, dual resonance point bi-directional linear vibrators are used in the industry, including vibrating components. As shown in fig. 1 and 2, the vibration assembly comprises a vibrator, a stator and a circuit board D, wherein the stator is two fixed coils a, the vibrator is a permanent magnet B and a balancing weight C which are arranged between the two coils a, the circuit board 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. ,

disclosure of Invention

The invention aims to provide a vibrating assembly applied to a linear vibrator and the linear vibrator, and solves the problem 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 the vibration performance.

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

a vibration assembly for a linear vibrator, comprising:

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;

under the driving action of current, the electromagnet can perform reciprocating bidirectional motion in a space between the first permanent magnet and the second permanent magnet.

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

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.

Optionally, the axial length of the coil is smaller than the axial length of the iron core along the coil, so that both 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 circuit board is fixedly mounted on the electromagnet through the mounting piece.

Optionally, the iron core is riveted, welded, clamped or bonded with the mounting piece.

Optionally, the mount comprises a body; the iron core comprises a body and is characterized in that a through groove matched with the exposed end part of the iron core is formed in the body, and the exposed end part of the iron core is arranged in the through groove in a penetrating mode.

Optionally, the connection end of the coil is electrically connected to the circuit board after being wound around the body.

Optionally, 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 permanent magnet and the second permanent magnet are connected to a positioning plate respectively on the outer sides facing away from the vibrator.

A linear vibrator comprising a vibration assembly as claimed in any one of the preceding claims.

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

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.

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 assembled perspective view of a vibration assembly of the linear vibrator provided in the embodiment of the present invention;

fig. 4 is an exploded view of a vibration assembly of a linear vibrator provided in an embodiment of the present invention;

fig. 5 is a perspective view of a circuit board of a linear vibrator provided in an embodiment of the present invention;

fig. 6 is an assembled perspective view of the linear vibrator provided in the embodiment of the present invention after removing a casing.

[ diagrammatic illustration ]

Coil A, permanent magnet B, balancing weight C, circuit board D, vibration subassembly 1, shell fragment subassembly 2, 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.

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. 3 and 4, an embodiment of the invention provides a vibration assembly 1 applied to a linear vibrator, specifically including 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;

the circuit board 14, specifically an FPC, is mounted on the vibrator, and is 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.

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 or any other parts, so that the condition 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 and the second permanent magnet is effectively ensured, and the vibration performance of the linear vibrator is ensured.

For example, referring to fig. 4, 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 is changed, so that the vibration direction of the vibrator is correspondingly changed. 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. 4, 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. 4, 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 arranged in the through groove 152 in a penetrating manner, so that the iron core 131 is riveted with the mounting part 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 15 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. 4, 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 B is used as a vibrator, and the two coils a on the two sides of the permanent magnet B are separately used as stators, at this time, the circuit board D needs to be simultaneously connected with the two separately arranged coils a, and often, the circuit board D is in a conventional planar design, and the two ends of the circuit board D are respectively electrically connected with the connecting 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. 5, 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 to realize the assembly of the stator and the shell.

The invention also provides a linear vibrator which comprises the vibration component 1, a spring plate component 2 and a shell. The specific structure of the elastic sheet assembly 2 and the housing, the invention is not limited. In this case, the method of assembling 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 and the shrapnel component 2 which are assembled with the circuit board 14 are assembled into a whole, as shown in fig. 6; finally, the assembly is loaded into the housing.

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.

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 vibratory assembly for use with a linear vibrator, comprising:

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);

under the driving action of current, the electromagnet (13) can perform reciprocating bidirectional motion in a space between the first permanent magnet (11) and the second permanent magnet (12).

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

3. The vibration assembly applied to the linear vibrator of claim 1, wherein the electromagnet (13) comprises a core (131) and a coil (132) wound around the periphery of the core (131), and an insulating layer (133) is further disposed between the coil (132) and the core (131).

4. The vibration assembly applied to a linear vibrator according to claim 3, wherein an axial length of the coil (132) is smaller than a length of the ferrite core (131) in an axial direction of the coil (132) such that both ends of the ferrite core (131) in a length direction are exposed to the outside with respect to the coil (132).

5. The vibration assembly applied to the linear vibrator of claim 4, wherein at least one end of the iron core (131) in a length direction is connected with a mounting member (15), and the circuit board (14) is fixedly mounted on the electromagnet (13) through the mounting member (15).

6. The vibration assembly applied to the linear vibrator of claim 5, wherein the iron core (131) is riveted, welded, snapped or bonded to the mounting member (15).

7. A vibration assembly for a linear vibrator according to claim 5, wherein 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).

8. The vibrating assembly applied to the linear vibrator of claim 7, wherein 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).

9. The vibrating assembly applied to a linear vibrator according to claim 1, wherein a positioning plate (16) is attached to the outer sides of the first permanent magnet (11) and the second permanent magnet (12) facing away from the vibrator, respectively.

10. A linear vibrator, comprising a vibration assembly as claimed in any one of claims 1 to 9.