CN114362468B

CN114362468B - Vibration device and electronic apparatus

Info

Publication number: CN114362468B
Application number: CN202111479741.9A
Authority: CN
Inventors: 高俊平; 牟雷
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2024-01-26
Anticipated expiration: 2041-12-06
Also published as: CN114362468A

Abstract

The invention belongs to the technical field of vibration exciters, and particularly relates to electronic equipment of a vibration device. The vibrating device comprises a shell component, a vibrator component, a stator component and an elastic component, wherein a mounting cavity is formed in the shell component, the vibrator component is suspended in the mounting cavity, the stator component is arranged in the mounting cavity and connected with the shell component, one of the vibrator component and the stator component comprises a magnetic circuit unit, the other of the vibrator component and the stator component comprises a first coil, the elastic component is arranged in the mounting cavity and comprises a magnetic yoke and at least one elastic piece, the magnetic yoke is connected with the first coil, the elastic piece comprises a plurality of elastic arms arranged along the circumferential direction, one ends of the elastic arms are connected with the magnetic yoke, and the other ends of the elastic arms are connected with the magnetic circuit unit. According to the vibrating device of the application, the vibrator assembly can be driven to vibrate and sound in the installation cavity, noise generated when the vibrating device sounds is reduced, the elastic sheet is prevented from deforming when falling and being impacted, and the reliability of the elastic assembly is improved.

Description

Vibration device and electronic apparatus

Technical Field

The invention belongs to the technical field of vibration exciters, and particularly relates to electronic equipment of a vibration device.

Background

Currently, electronic devices such as mobile phones, tablet computers, and notebook computers tend to be lighter and thinner. The thickness dimension of the conventional micro-speaker is compressed, affecting the acoustic performance index. The sound production of the screen is focused as a solution for the light and thin design of the product.

The current screen sounding device takes the traditional micro-speaker structure as a frame, and most products are smaller in BL characteristic index value, narrower in frequency band and higher in power consumption. The rigidity of the elastic component in the non-vibration direction is smaller, so that the elastic component is insufficient to resist harmful vibration modes such as rotation and swing and is easy to produce noise. Meanwhile, the yield allowance of the elastic sheet is smaller, and the elastic sheet is easy to deform when falling and being impacted, so that the reliability of the elastic assembly in working is affected.

Disclosure of Invention

The invention aims to at least solve the problem that the vibration device is easy to generate noise due to the fact that the elastic component is low in rigidity in the non-vibration direction. The aim is achieved by the following technical scheme:

a first aspect of the present invention proposes a vibration device comprising:

a housing assembly having an installation cavity formed therein;

the vibrator assembly is suspended in the mounting cavity;

the stator assembly is arranged in the mounting cavity and connected with the shell assembly, one of the vibrator assembly and the stator assembly comprises a magnetic circuit unit, and the other one of the vibrator assembly and the stator assembly comprises a first coil;

elastic component, elastic component locates the installation cavity, including yoke and at least one shell fragment, the yoke with first coil links to each other, the shell fragment includes a plurality of elastic arms that set up along circumference direction, the one end of elastic arm with the yoke links to each other, the other end of elastic arm with the magnetic circuit unit links to each other.

According to the vibrating device of the application, through setting up oscillator subassembly and stator module in the installation cavity of casing subassembly, one of them includes the magnetic circuit unit of oscillator subassembly and stator module, wherein another includes first coil, be in under the energization state when vibrating device, first coil produces electromagnetic force under the interact of electric current and magnetic field, thereby drive oscillator subassembly is vibrating in the installation cavity, and then drive sound production, simultaneously because first coil links to each other with the yoke, and connect yoke and magnetic circuit unit through the elastic arm of shell fragment, can increase the rigidity of elastic component in non-vibration direction effectively through the setting of yoke, thereby noise when reducing vibrating device sound production is prevented simultaneously that the shell fragment from taking place to warp when falling and receiving the impact, thereby improve the reliability of elastic component during operation.

In addition, the vibration device according to the present invention may have the following additional technical features:

in some embodiments of the present invention, at least one side end surface of the magnetic yoke is provided with a housing connection part in a protruding manner, the housing connection part is connected with the housing assembly, and the first coil is looped on an outer side wall of the magnetic yoke.

In some embodiments of the present invention, at least one side end surface of the magnetic yoke is convexly provided with a spring plate connecting portion, the spring plate is provided with a first mounting hole, the first mounting hole is sleeved outside the housing connecting portion, and the spring plate connecting portion is connected with the first side surface of the elastic arm.

In some embodiments of the present invention, the vibration device further includes a damping fin, a second mounting hole is provided on the damping fin, the second mounting hole is sleeved outside the housing connection portion, and the damping fin is connected to the second side surface of the elastic sheet.

In some embodiments of the present invention, the elastic piece further includes a main body portion, the one end of the elastic arm is connected to the main body portion and is provided with an inner connection portion, the inner connection portion is connected to the yoke, the other end of the elastic arm, which is far away from the main body portion, is provided with an outer connection portion, the outer connection portion is connected to the magnetic circuit unit, the plurality of elastic arms are circumferentially arranged outside the main body portion, and an included angle between extension directions of any adjacent two of the plurality of elastic arms is equal.

In some embodiments of the present invention, the number of the elastic pieces is two, the two elastic pieces are respectively disposed at two sides of the magnetic yoke, and the extending directions of the elastic arms on the two elastic pieces are opposite or the same.

In some embodiments of the present invention, the number of the elastic arms is four, and any adjacent two of the four elastic arms are disposed at a distance of 90 °.

In some embodiments of the present invention, the vibrator assembly includes at least one magnetic circuit unit, the magnetic circuit unit is provided with a magnet, an upper magnetic conductive plate and a lower magnetic conductive plate, and the upper magnetic conductive plate and the lower magnetic conductive plate are respectively disposed at two sides of the magnet.

In some embodiments of the present invention, the vibrator assembly includes a plurality of magnetic circuit units, the plurality of magnetic circuit units are connected end to end in sequence, a mass block is disposed between any two magnetic circuit units, and the other end of the elastic arm is connected with the mass block.

In some embodiments of the invention, the housing assembly comprises an upper shell and a lower shell that cooperate with each other, the inner side walls of the upper shell and/or the lower shell being provided with a second coil.

Another aspect of the present invention also proposes an electronic apparatus having the vibration device described in any one of the above.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. Wherein:

fig. 1 is a schematic view showing the overall structure of a vibration device according to the present embodiment;

FIG. 2 is an exploded view of the vibration device of FIG. 1;

FIG. 3 is a schematic view of the vibration device of FIG. 1 with the upper shell removed;

FIG. 4 is a schematic view of the vibration device of FIG. 3 with the spring and the printed circuit board removed;

FIG. 5 is a schematic diagram of the magnetic circuit unit of FIG. 4;

FIG. 6 is a schematic diagram of a split structure of the magnetic circuit unit in FIG. 5;

FIG. 7 is a schematic view of the vibration device of FIG. 3 with the magnetic circuit unit removed;

FIG. 8 is a schematic diagram illustrating a connection structure between the yoke and the first coil in FIG. 7;

FIG. 9 is a schematic structural view of the spring in FIG. 7;

FIG. 10 is a schematic view of the damping shim of FIG. 7;

fig. 11 is a schematic diagram of a connection structure between the lower case and the second coil in fig. 2.

The various references in the drawings are as follows:

100: a vibration device;

10: housing assembly, 11: upper shell, 12: lower shell, 121: a mounting groove;

20: magnetic circuit unit, 21: magnet, 22: upper magnetically permeable plate, 23: lower magnetically permeable plate, 24: a mass block;

31: first coil, 32: a second coil;

41: yoke, 411: housing connection portion, 412: spring piece connecting part, 42: spring piece, 421: main body, 4211: first mounting hole, 422: spring arm, 4221: inner connection portion, 4222: an outer link;

50: damping fin, 51: second mounting hole, 52: a fixing part;

60: a printed circuit board;

70: a gasket.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For ease of description, spatially relative terms, such as "inner," "outer," "lower," "below," "upper," "above," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

The invention provides electronic equipment, such as a smart phone, a plane computer or an ultrathin notebook. The electronic equipment is internally provided with the vibration device 100, and the screen of the electronic equipment is driven to vibrate and sound through the vibration generated by the operation of the vibration device 100. Specifically, as shown in fig. 1 and 2, the vibration device 100 of the present embodiment includes a housing assembly 10, a vibrator assembly, a stator assembly, and an elastic assembly. Wherein, the casing assembly 10 includes the upper shell 11 and the inferior valve 12 that mutually support, and the structure of upper shell 11 and inferior valve 12 is similar, all is provided with the flange lateral wall, and the lateral wall cover of upper shell 11 is located the lateral wall outside of inferior valve 12 to form the installation cavity between upper shell 11 and inferior valve 12, oscillator subassembly, stator module and elastic component all locate this installation cavity. Specifically, the upper case 11 and the lower case 12 are connected by gluing or welding at the overlapping portion of the flange side walls.

As shown in fig. 2 to 4, the vibrator assembly of the present embodiment includes a magnetic circuit unit 20, the stator assembly includes a first coil 31, the elastic assembly includes a yoke 41 and two elastic pieces 42, and the two elastic pieces 42 are respectively disposed on two sides of the yoke 41. The elastic piece 42 includes a plurality of elastic arms 422 disposed in the circumferential direction, one ends of the elastic arms 422 are connected to the yoke 41, and the other ends of the elastic arms 422 are connected to the magnetic circuit unit 20. In the present embodiment, the first coil 31 is disposed around the outer peripheral surface of the yoke 41, and the yoke 41 is connected to the housing assembly 10, so that the first coil 31 is fixed inside the mounting chamber to form the stator assembly of the vibration device 100. The magnetic circuit unit 20 is suspended in the mounting cavity by the elastic arms 422 and reciprocates in the axial direction in the energized state of the vibration device 100, thereby forming a vibrator assembly of the vibration device 100.

According to the vibration device 100 of the application, through setting up vibrator subassembly and stator module in the installation cavity of casing subassembly 10, vibrator subassembly includes magnetic circuit unit 20, the stator module includes first coil 31, when vibration device 100 is in the circular telegram state, first coil 31 produces electromagnetic force under the interact of electric current and magnetic field, thereby drive magnetic circuit unit 20 vibrates in the installation cavity, and then drive sound production, simultaneously because first coil 31 links to each other with yoke 41, and connect yoke 41 and magnetic circuit unit 20 through the elastic arm 422 of shell fragment 42, can increase the rigidity of elastic component in non-vibration direction effectively through the setting of yoke 41, thereby noise when reducing vibration device 100 sound production, prevent simultaneously that shell fragment 42 from taking place to warp when falling and receiving the impact, thereby improve the reliability of elastic component during operation.

In other embodiments of the present application, the magnetic circuit unit 20 may also be connected with the housing assembly 10, thereby forming a stator assembly of the vibration device 100. The magnetic yoke 41 is connected to the magnetic circuit unit 20 through the elastic sheet 42, and can drive the first coil 31 to reciprocate along the axial direction under the action of electromagnetic force, so that the first coil 31 becomes a vibrator assembly of the vibration device 100, and further drives and sounds.

As shown in fig. 4 to 6, the vibrator assembly of the present embodiment includes a plurality of magnetic circuit units 20, specifically four magnetic circuit units 20, which are connected end to end in sequence, and a mass block 24 is disposed between any two magnetic circuit units 20, so that the vibrator assembly is in a rectangular annular structure as a whole. The mass block 24 is preferably made of a metal material which is easy to weld and is welded with the magnetic circuit units 20, so that the mass block is used for connecting the magnetic circuit units 20, effectively increasing the vibration amplitude of the magnetic circuit units 20 and improving the sounding effect.

Specifically, each of the magnetic circuit units 20 in the present embodiment includes a magnet 21, an upper magnetic conductive plate 22, and a lower magnetic conductive plate 23, and the upper magnetic conductive plate 22 and the lower magnetic conductive plate 23 are provided on both sides of the magnet 21, respectively. Wherein, the upper magnetic conductive plate 22 and the lower magnetic conductive plate 23 can be made of soft iron or other magnetic conductive materials.

In other embodiments of the present application, the magnet 21 may be a rectangular ring magnet connected end to end, and at the same time, the upper magnetic conductive plate 22 and the lower magnetic conductive plate 23 may also be rectangular ring magnetic conductive plates connected end to end, and the structure of the mass block 24 is eliminated correspondingly, so that the vibrator assembly can effectively vibrate and sound.

As shown in fig. 7 to 9, the yoke 41 of the present embodiment is provided with a case connecting portion 411 and a plurality of spring piece connecting portions 412 protruding from both side end surfaces thereof. Specifically, the housing connecting portion 411 is provided at the center of the end face of the yoke 41, and the plurality of spring piece connecting portions 412 are provided at the edge of the yoke 41 at equal angular intervals. Wherein the case connecting parts 411 at both ends are connected to the upper case 11 and the lower case 12 of the case assembly 10, respectively, thereby fixing the yoke 41 in the mounting cavity. The first coil ring 31 is provided on the outer side wall of the yoke 41, and forms a vibrator assembly of the vibration device 100. The elastic piece 42 is provided with a first mounting hole 4211, and the first mounting hole 4211 is sleeved outside the housing connection part 411, so that the elastic piece 42 is fixed at two end parts of the magnetic yoke 41, and is connected with the first side surface of the elastic arm 422 through the elastic piece connection part 412, and further connection and fixation between the elastic piece 42 and the magnetic yoke 41 are realized.

The elastic sheet 42 in the present embodiment includes a main body 421 and a plurality of elastic arms 422, the plurality of elastic arms 422 are circumferentially disposed outside the main body 421, and an angle between extending directions of any two adjacent elastic arms 422 in the plurality of elastic arms 422 is equal. Specifically, in the present embodiment, the number of the elastic arms 42 on any one of the elastic pieces 42 is four, and the extending directions of the four elastic arms 422 are annularly arranged at intervals of 90 ° in the circumferential direction of the main body 421. Wherein, one end of the elastic arm 422 connected with the main body 421 is provided with an inner connecting portion 4221, the inner connecting portion 4221 is connected with the spring piece connecting portion 412 of the yoke 41, the other end of the elastic arm 422 away from the main body 421 is provided with an outer connecting portion 4222, and the outer connecting portion 4222 is connected with the mass block 24 of the magnetic circuit unit 20, so that the relative movement between the magnetic circuit assembly 20 and the first coil 31 is realized through the spring piece 42.

Further, the extending directions of the elastic arms 422 on the two elastic pieces 42 at the two ends of the yoke 41 in the present embodiment are opposite. Specifically, after one of the elastic pieces 42 is mirrored along a plane perpendicular to the plate surface of the magnetic yoke 41, the placement angle of the other elastic piece 42 can be obtained, so that an antisymmetric arrangement is formed, and the rotational movement rigidity of the elastic component can be further improved, and the noise is reduced. Specifically, the elastic arm 422 in the present embodiment may employ any one of a circular arc-shaped elastic arm, a curved elastic arm, and a linear elastic arm.

In other embodiments of the present application, the extending directions of the elastic arms 422 on the two elastic pieces 42 at two ends of the yoke 41 are the same, that is, the two elastic pieces 42 are symmetrically arranged about the plate surface of the yoke 41, which can also increase the rotational rigidity of the elastic component and reduce the noise.

In other embodiments of the present application, the elastic piece 42 may be provided only on one end surface of the yoke 41, and the magnetic circuit unit 20 and the yoke 41 may be connected by one elastic piece 42, so that the vibration device 100 may be effectively driven to vibrate and sound, and the noise may be reduced.

Further, as shown in fig. 7 and 9, the vibration device 100 of the present embodiment further includes a damper 50. Specifically, the number of damper 50 in the present embodiment is also two, and the damper is provided on both sides of the yoke 41. The damping fin 50 is provided with a second mounting hole 51, and the second mounting hole 51 is sleeved outside the housing connecting portion 411, so that the housing connecting portion 411 passes through the damping fin 50 and is connected with the housing assembly 10. The outer edge of the damping sheet 50 is provided with a plurality of fixing portions 52 at equal angular intervals, and is connected to the second side of the elastic sheet 42 through the fixing portions 52, thereby improving mechanical damping of the elastic sheet 42, and specifically, the fixing portions 52 are connected to the inner connecting portion 4221. The shape of the fixing portion 52 may be the same as or similar to the shape of the inner connecting portion 4221. The damping sheet 50 of the present embodiment may be made of elastic materials such as rubber, foam, or the like, and specifically may be connected to the second side of the elastic sheet 42 at both ends by means of gluing, or the like, and the mechanical damping of the elastic assembly may be adjusted by providing the damping sheet 50 with different shapes and sizes. Further, the elastic piece 42 of the present embodiment is disposed between the damper 50 and the yoke 41, the side of the elastic piece 42 facing the yoke 41 is a first side, and the side of the elastic piece 42 facing the damper 50 is a second side.

Further, as shown in fig. 2, 3 and 11, the vibration device 100 of the present embodiment further includes a second coil 32, and the second coil 32 is attached to the inner side wall of the lower case 12, is looped around the outside of the magnetic circuit unit 20, and is disposed at intervals in the magnetic circuit unit 20. The magnetic circuit unit 20 can simultaneously cut the magnetic induction lines of the first coil 31 and the second coil 32 in the reciprocating process, thereby increasing the vibration amplitude of the magnetic circuit unit 20 and further increasing the sound production effect.

Further, as shown in fig. 2, 3 and 11 again, the inner side surface of the lower case 12 of the present embodiment is further provided with a mounting groove 121, and the printed circuit board 60 may be disposed in the mounting groove 121 and electrically connected to the first coil 31 and the second coil 32 for supplying power to the first coil 31 and the second coil 32, thereby generating an electromagnetic field and driving the vibrator assembly to generate a sound.

Further, as shown in fig. 2, the vibration device 100 of the present embodiment further includes a spacer 70, specifically, the spacer 70 of the present embodiment may be made of a material such as double-sided adhesive tape or silicone rubber, and the vibration device 100 is connected to the screen of the electronic apparatus through the spacer 70, so as to generate sound through vibration of the screen.

The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims

1. A vibration device, comprising:

a housing assembly having an installation cavity formed therein;

the vibrator assembly is suspended in the mounting cavity;

the stator assembly is arranged in the mounting cavity and connected with the shell assembly, the vibrator assembly comprises a magnetic circuit unit, and the stator assembly comprises a first coil;

the elastic component is arranged in the installation cavity and comprises a magnetic yoke and at least one elastic piece, the magnetic yoke is connected with the first coil, the elastic piece comprises a plurality of elastic arms arranged along the circumferential direction, one ends of the elastic arms are connected with the magnetic yoke, and the other ends of the elastic arms are connected with the magnetic circuit unit;

the magnetic yoke comprises a magnetic yoke body, a first coil, a second coil, a spring plate and a spring plate connecting part, wherein the end face of at least one side of the magnetic yoke protrudes to be provided with the shell connecting part and the spring plate connecting part, the shell connecting part is connected with the shell assembly, the first coil is arranged on the outer side wall of the magnetic yoke in a surrounding mode, a first mounting hole is formed in the spring plate, the first mounting hole is sleeved outside the shell connecting part, and the spring plate connecting part is connected with the first side face of the elastic arm.

2. The vibration device of claim 1, further comprising a damper, wherein the damper is provided with a second mounting hole, the second mounting hole is sleeved on the outer periphery of the connecting portion of the housing, and the damper is connected to the second side of the elastic sheet.

3. The vibration apparatus according to claim 1, wherein the elastic piece further comprises a main body portion, the one end of the elastic arm is connected to the main body portion and is provided with an inner connecting portion, the inner connecting portion is connected to the yoke, the other end of the elastic arm away from the main body portion is provided with an outer connecting portion, the outer connecting portion is connected to the magnetic circuit unit, a plurality of elastic arms are circumferentially looped on the outside of the main body portion, and an angle between extending directions of any adjacent two of the plurality of elastic arms is equal.

4. A vibration apparatus according to claim 3, wherein the number of the elastic pieces is two, the two elastic pieces are respectively disposed on two sides of the yoke, and the extending directions of the elastic arms on the two elastic pieces are opposite or the same.

5. A vibration apparatus according to claim 3, wherein the number of said elastic arms is four, and any adjacent two of said four elastic arms are disposed at a 90 ° interval.

6. The vibration apparatus of claim 1, wherein the vibrator assembly includes at least one magnetic circuit unit provided with a magnet, an upper magnetic conductive plate, and a lower magnetic conductive plate, the upper magnetic conductive plate and the lower magnetic conductive plate being provided on both sides of the magnet, respectively.

7. The vibration apparatus according to claim 6, wherein the vibrator assembly includes a plurality of the magnetic circuit units, the plurality of the magnetic circuit units are connected end to end in sequence, a mass block is provided between any two of the magnetic circuit units, and the other end of the elastic arm is connected to the mass block.

8. The vibration apparatus according to claim 1, wherein the housing assembly comprises an upper shell and a lower shell which are mated with each other, and wherein the inner side walls of the upper shell and/or the lower shell are provided with a second coil.

9. An electronic apparatus characterized by having the vibration device according to any one of claims 1 to 8.