WO2021196749A1

WO2021196749A1 - Miniature loudspeaker module array and audio-visual device

Info

Publication number: WO2021196749A1
Application number: PCT/CN2020/137012
Authority: WO
Inventors: 谢萍; 周莹; 王国福
Original assignee: 歌尔股份有限公司
Priority date: 2020-03-30
Filing date: 2020-12-17
Publication date: 2021-10-07
Also published as: CN211267081U

Abstract

Disclosed in the present utility model are a miniature loudspeaker module array and an audio-visual device. The miniature loudspeaker module array comprises a plurality of miniature loudspeaker modules; each miniature loudspeaker module comprises a housing and a miniature loudspeaker unit provided in the housing, the miniature loudspeaker unit divides an inner cavity of the housing into a rear sound cavity and a front sound cavity, and the housing is provided with a sound outlet hole in communication with the front sound cavity; and the plurality of miniature loudspeaker modules are arranged and connected in a row by means of the housings, and sound outlet holes of the miniature loudspeaker modules face the same side. By means of the technical solution of the present utility model, the audio-visual device having the miniature loudspeaker module array not only can obtain a relatively large loudness, but also facilitates lightening and thinning thereof.

Description

Micro speaker module array and audio-visual equipment

Technical field

The utility model relates to the technical field of sound generating devices, in particular to a miniature speaker module array and audio-visual equipment.

Background technique

For audio-visual equipment, such as TVs, and TV variants (such as conference systems dedicated to video conferencing, smart screens that add smart applications, etc.), in order to obtain greater loudness, they usually need to be assembled on the back of the display body of the audio-visual equipment A large-size speaker, in this way, is not conducive to the thinning of audio-visual equipment.

Utility model content

The main purpose of the present invention is to propose a miniature speaker module array, which aims to enable the audiovisual equipment with the miniature speaker module array to not only obtain greater loudness, but also facilitate the realization of its lightness and thinness.

In order to achieve the above objective, the micro speaker module array proposed by the present invention includes a plurality of micro speaker modules, the micro speaker module includes a housing and a micro speaker unit arranged in the housing, the micro speaker unit The inner cavity of the housing is separated from a rear acoustic cavity and a front acoustic cavity, and the housing is provided with a sound outlet communicating with the front acoustic cavity; a plurality of the micro speaker modules are arranged in a row through the housing, and each The sound holes of the micro speaker module face the same side.

Optionally, the housing is flat, and has two opposite wide housing walls and a narrow housing wall connecting the two wide housing walls, and the diaphragm of the micro speaker unit is parallel to the wide housing wall.

Optionally, the sound hole is opened on the wide shell wall.

Optionally, the shells of any two adjacent micro speaker modules are connected and fixed.

Optionally, the multiple housings of the multiple micro speaker modules are integrally formed; or, the housings of any two adjacent micro speaker modules are glued and fixed.

Optionally, the housing is provided with a detachable connection structure for connecting with the equipment to be assembled.

Optionally, the detachable connection structure is a mounting hole provided in the housing, and the mounting hole is used for a fastener to pass through and connect.

The present utility model also provides an audio-visual equipment, which includes a display screen body and the aforementioned micro speaker module array, and the micro speaker module array is installed on the display screen body.

Optionally, there are multiple micro speaker module arrays, at least one sound hole of the micro speaker module array is exposed on the front of the display screen, and at least one of the micro speaker module arrays The sound hole is exposed on the back of the display screen body.

Optionally, at least one micro speaker module array is provided on the left and right sides and/or the upper and lower sides of the front surface of the display screen body.

Optionally, there are multiple micro speaker module arrays, at least one sound hole of the micro speaker module array is exposed on the side of the display screen, and at least one of the micro speaker module arrays The sound hole is exposed on the back of the display screen body.

In the technical scheme of the present invention, the micro speaker module array includes a plurality of micro speaker modules, the plurality of micro speaker modules are arranged and connected in a row by the housing, and the sound holes of each of the micro speaker modules face the same side, In this way, after the micro speaker module array is assembled to audio-visual equipment (such as but not limited to televisions, conference systems dedicated to video conferencing, smart screens added to smart applications, etc.), it can be used as a speaker as a whole, and compared to ordinary Large-size speakers, because the micro-speaker module array uses micro-speaker units, it has advantages in size, which is conducive to the realization of light and thin audio-visual equipment; in addition, because the micro-speaker module array has multiple micro-speaker units , can enhance the effective radiating area (S _D) and the force coefficient Bl, so that it can cause the micro-array module having a large loudspeaker loudness, and further such that the audiovisual apparatus can obtain a large loudness.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description These are just some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on the structure shown in these drawings.

Figure 1 is a schematic structural diagram of an embodiment of the audiovisual equipment of the present invention;

2 is a schematic diagram of the structure of the micro speaker module array of the audio-visual equipment in FIG. 1;

3 is a schematic diagram of the structure of the micro speaker module of the micro speaker module array in FIG. 2.

Attached icon number description:

标号Label	名称name	标号Label	名称name
11	微型扬声器模组阵列Micro speaker module array	1010	微型扬声器模组 Micro speaker module
1111	外壳 shell	101101	宽壳壁 Wide shell wall
102102	窄壳壁 Narrow wall	111111	前声腔Front vocal cavity
112112	后声腔 Back cavity	113113	出声孔 Sound hole
114114	安装孔 Mounting holes	1212	微型扬声器单体 Micro speaker unit
22	显示屏体Display body	To	To

The realization of the purpose, functional characteristics and advantages of the utility model will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. Examples. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present utility model.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present utility model, the directional indication is only used to explain that it is in a specific posture (as shown in the accompanying drawings). The relative positional relationship, movement conditions, etc. between the components shown below), if the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions related to "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and cannot be understood as instructions or Imply its relative importance or implicitly indicate the number of technical features indicated. Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and/or" in the full text includes three parallel schemes. Taking "A and/or B" as an example, it includes scheme A, scheme B, or schemes in which both A and B meet. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on what can be achieved by a person of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that such a combination of technical solutions does not exist. , Is not within the scope of protection required by the utility model.

The utility model proposes a miniature speaker module array.

Referring to FIGS. 1 to 3, in an embodiment of the present invention, the micro speaker module array 1 includes a plurality of micro speaker modules 10. The micro speaker module 10 includes a housing 1 and a micro speaker unit 12 arranged in the housing 1. The micro speaker unit 12 separates the inner cavity of the housing 1 from a rear sound cavity 112 and a front sound cavity 111, and the housing 1 is provided with a rear sound cavity 112 and a front sound cavity 111. A sound hole 113 communicated with the front sound cavity 111. A plurality of micro speaker modules 10 are arranged and connected in a row by the housing 1, and the sound holes 113 of each micro speaker module 10 face the same side.

It can be understood that in the micro speaker module array 1, each micro speaker unit 12 can be regarded as a point source radiation (when ka<<1), the sound pressure formula at the distance r satisfies:

Wherein: ρ ₀ is the air density, f is the vibration frequency, S _D is the effective area of the radiation, v _c is the speed of vibration of the voice coil;

It is an accurate solution of the vibration speed of the voice coil.

In the low frequency band: the mass and damping terms within the _{v c root sign are much smaller than}

so,

In the mid-frequency band: _{the damping and compliance terms in the root of v c} are much smaller than the mass term ω (M _MS + M _MR ), so,

From the above low-frequency and mid-frequency sound pressure formulas, it can be seen that the effective radiation area (S _D ) and Bl can be increased to increase the sound pressure of the speaker system, thereby increasing the radiation efficiency of the speaker system and making it higher Loudness.

In this embodiment, the micro speaker module array 1 includes a plurality of micro speaker modules 10, that is, includes a plurality of micro speaker units 12, so that the micro speaker module array 1 has multiple diaphragms and has a relatively high Large effective radiation area (S _D ), multiple coils and multiple magnetic circuits at the same time, and a larger force coefficient Bl, so that the micro speaker module array 1 can have a larger loudness.

In the technical solution of the present invention, the micro speaker module array 1 includes a plurality of micro speaker modules 10, and the plurality of micro speaker modules 10 are arranged and connected in a row through the housing 1, and each of the micro speaker modules 10 emits sound. The holes 113 face the same side, so that the miniature speaker module array 1 can be used as a speaker unit after being assembled to audio-visual equipment (such as but not limited to televisions, conference systems dedicated to video conferencing, smart screens added to smart applications, etc.) Compared with ordinary large-size speakers, the micro-speaker module array 1 uses the micro-speaker unit 12, which has advantages in size, which is beneficial to realize the thinner and lighter audio-visual equipment; in addition, because of the micro-speaker module The group array 1 has a plurality of micro speaker units 12, which can increase its effective radiation area (S _D ) and force coefficient Bl, so that the micro speaker module array 1 can have a greater loudness, thereby enabling the audiovisual equipment to be able to Get greater loudness.

It should be noted that the number of micro speaker modules 10 in the micro speaker module array 1 shown in FIG. 2 is 4, but this does not limit the number of micro speaker modules 10 in the micro speaker module array 1 of the present invention. The number of micro speaker modules 10 can be adjusted according to the size of the audio-visual equipment.

Further, the housing 1 is flat, and has two opposite wide housing walls 101 and a narrow housing wall 102 connecting the two wide housing walls 101. The diaphragm of the micro speaker unit 12 is parallel to the wide housing wall 101, that is, The miniature speaker module 10 is flat as a whole, so that the miniature speaker module array 1 can be made thinner as a whole, so that it can be fit into a thinner audiovisual equipment, thereby further improving the lightness and thinness of the audiovisual equipment.

Further, the sound hole 113 is opened on the wide shell wall 101, so that while facilitating the thinning of the audio-visual equipment, the audio-visual equipment can achieve front or rear sound. It can be understood that for this type of miniature speaker module 10, when it is assembled in such a way that the wide shell wall 101 is parallel to the display screen body 2 of the audio-visual equipment, it is beneficial to the thinning of the audio-visual equipment, and at this time, its sound hole 113 either faces the front of the display screen body 2 or the rear of the display screen body 2, so as to realize the front or rear sound of the audiovisual equipment. However, the present design is not limited to this. In other embodiments, the sound hole 113 can also be provided on the narrow shell wall 102. In this way, the audio-visual device can be lightened and thinned while realizing the side sound of the audio-visual device.

Further, the housings 1 of any two adjacent micro-speaker modules 10 are connected and fixed, that is, for the micro-speaker module array 1, the micro-speaker modules 10 are fixedly connected to form a whole; The entire micro speaker module array 1 can be taken and put in place, so that it can be easily assembled to audio-visual equipment as a whole, which can improve its assembly efficiency. In particular, the micro-speaker module array 1 can also be conveniently applied to the automation of audio-visual equipment. Assemble, improve the production automation of products, and reduce labor costs. However, the present design is not limited to this. In other embodiments, the housings 1 of two adjacent micro speaker modules 10 may not be connected and fixed to each other, but each micro speaker module 10 is attached to the display screen of the audio-visual equipment. The body 2 is installed and fixed. When assembling, a plurality of micro speaker modules 10 need to be assembled to the display body 2 one by one.

In this embodiment, optionally, the multiple housings 1 of the multiple micro speaker modules 10 are integrally formed. In particular, when the housing 1 is a plastic housing, the multiple housings 1 can be integrally formed by injection molding; The integral molding of the housing 1 is beneficial to save subsequent assembly procedures, thereby improving assembly efficiency.

However, the present design is not limited to this. In some other embodiments, the shells 1 of any two adjacent micro speaker modules 10 can be bonded and fixed; it can be understood that the bonding process is simple and easy to assemble.

In other embodiments, the housings 1 of any two adjacent micro speaker modules 10 can be detachably connected. In this way, when the micro speaker unit 12 of one of the micro speaker modules 10 fails, the It can be replaced separately to reduce maintenance costs; optionally, the detachable connection method used can be, but not limited to, screw-locked connection, snap connection, etc.

Further, the housing 1 is provided with a detachable connection structure for connecting with the equipment to be assembled, so that the micro speaker module array 1 and the equipment to be assembled, such as audio-visual equipment, can be disassembled and assembled after assembly; in particular, The fault repair or damage replacement of the micro speaker module array 1 can be realized.

In this implementation, optionally, the detachable connection structure is a mounting hole 114 provided in the housing 1, and the mounting hole 114 is used to allow fasteners to pass through and connect; generally, the device to be assembled will correspond to the mounting hole 114 The hole 114 is provided with an assembly hole, and a fastener (such as a bolt) passes through the assembly hole 114 and the assembly hole in sequence to realize the stable and reliable installation of the micro speaker module array 1 on the equipment to be assembled. However, the present design is not limited to this. In other embodiments, the detachable connection structure may also include a buckle provided on the housing 1. Accordingly, the device to be assembled will be provided with a buckle corresponding to the buckle. The buckle adapter is used for buckling, so as to realize the installation of the micro speaker module array 1 on the equipment to be assembled.

1 to 3, the present invention also proposes an audio-visual equipment, the audio-visual equipment includes a display screen body 2 and a micro speaker module array 1, the specific structure of the micro speaker module array 1 refer to the above-mentioned embodiment, due to this The audio-visual equipment adopts all the technical solutions of all the foregoing embodiments, and therefore has at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments, which will not be repeated here. Among them, the micro speaker module array 1 is installed on the display screen 2. In the present invention, the audio-visual equipment can be, but is not limited to, a TV, and a transforming product of the TV (for example, a conference system dedicated to video conferences, a smart screen for adding smart applications, etc.).

Furthermore, the micro speaker module array 1 is provided with a plurality of sound holes 113 of the at least one micro speaker module array 1 exposed on the front of the display screen 2, and at least one sound hole 113 of the micro speaker module array 1 It is exposed on the back of the display screen 2. That is, in this embodiment, part of the sound of the audio-visual equipment can be radiated from the front. Compared with common audio-visual equipment that only has a large-size speaker on the back and can only emit sound from the back, the audio-visual equipment of this embodiment can obtain The sound radiated from the front is easy to radiate to the user, which can enable the user to get a better experience; at the same time, some of the audio-visual equipment can be radiated from the back, especially when the audio-visual equipment is installed against the wall, from the back The radiated sound can be reflected on the wall to enhance the overall sound effect of the audio-visual equipment. In addition, the back radiation can also reduce the low-frequency and high-frequency attenuation of the audio-visual equipment’s sound. This is more beneficial for the stereo expansion of the audio-visual equipment. It is also easier to widen the sound field. Optionally, in this embodiment, for the micro-speaker module array 1 that radiates sound from the front and the back radiates, the sound holes 113 are all selected to be opened in the wide shell wall 101 of the housing 1, so that it is beneficial for viewing and listening. Thinner and lighter equipment.

It should be noted that the micro speaker module array 1 shown in FIG. 1 is arranged on the front and back of the display screen body 2, so that the sound holes 113 of the micro speaker module array 1 are exposed on the display screen body 2. Front and back. However, the present design is not limited to this. In other embodiments, the micro speaker module array 1 can also be built into the display screen body 2, and at the same time, the display screen body 2 is provided to communicate with the sound holes 113 of the micro speaker module array 1 The sound hole 113 can be connected to the external space of the display screen body 2. In this case, the sound hole 113 is exposed on the front and back of the display screen body 2 through corresponding communicating holes.

In addition, in the present invention, the display screen body 2 usually includes a screen case and a display screen provided on the screen case. For the embodiment in which the micro speaker module array 1 is built into the display body 2, the communication hole corresponding to the sound hole 113 is usually opened on the screen shell; however, the design is not limited to this, and may also correspond to the sound hole 113 The communicating hole is opened on the display screen.

Further, referring to FIG. 1, at least one micro speaker module array 1 is provided on the left and right sides of the front of the display body 2, that is, the left and right sides of the front of the display body 2 can emit sound symmetrically, so, It is helpful to improve the stereo effect of audio-visual equipment. However, the present design is not limited to this. In some other embodiments, at least one micro speaker module array 1 may be provided only on the upper and lower sides of the front surface of the display screen 2. In still other embodiments, at least one micro speaker module array 1 can be provided on both the left and right sides and the upper and lower sides of the front surface of the display screen 2 at the same time. Of course, the arrangement of the micro-speaker module array 1 on the back of the display screen 2 can refer to that on the front of the display screen 2.

It should be noted that, in this embodiment, one micro speaker module array 1 or multiple micro speaker module arrays 1 may be provided on the same side (for example, the left side) of the front of the display body 2; When a plurality of micro speaker module arrays 1 are arranged at the same time, the plurality of micro speaker module arrays 1 are usually arranged at even intervals on the corresponding sides.

The audio-visual equipment shown in Fig. 1 has both front-out and back-out sounds. However, the present design is not limited to this. In other embodiments, a plurality of micro speaker arrays on the audio-visual equipment may also be configured such that at least one sound hole 113 of the micro speaker module array 1 is exposed on the side surface of the display body 2. And the sound hole 113 of the at least one micro speaker module array 1 is exposed on the back of the display screen 2; in this way, it can also be realized that the audio-visual equipment has side sound and back sound at the same time; optionally, in this embodiment, For the micro speaker module array 1 with side sound, the sound hole 113 is selected from the narrow shell wall 102 of the housing 1, and the micro speaker module array 1 for back sound is selected, and the sound hole 113 is selected from the housing 1 The wide shell wall 101 is conducive to the thinning of audio-visual equipment.

In the present invention, the sound output method of the audio-visual equipment is to assist the front sound or side sound through the back sound. In this way, it is more advantageous for the stereo extension application of the audio-visual equipment, and the sound field is also easier to broaden.

The above descriptions are only the preferred embodiments of the utility model, and do not limit the scope of the utility model's patents. Any equivalent structural transformation made by using the contents of the utility model description and drawings under the inventive concept of the utility model, or Direct/indirect applications in other related technical fields are included in the scope of patent protection of this utility model.

Claims

A micro speaker module array, characterized in that it includes a plurality of micro speaker modules, the micro speaker module includes a housing and a micro speaker unit arranged in the housing, and the micro speaker unit connects the A rear acoustic cavity and a front acoustic cavity are separated from the inner cavity of the housing, and the housing is provided with a sound outlet communicating with the front acoustic cavity; The sound holes of the group face the same side.
The micro speaker module array of claim 1, wherein the housing is flat, and has two opposite wide housing walls, and a narrow housing wall connecting the two wide housing walls, the micro speaker The single diaphragm is parallel to the wide shell wall.
3. The micro speaker module array of claim 2, wherein the sound outlet is opened on the wide shell wall.
The micro speaker module array of claim 1, wherein the housings of any two adjacent micro speaker modules are connected and fixed.
5. The micro speaker module array of claim 4, wherein the multiple housings of the multiple micro speaker modules are integrally formed; or, the housings of any two adjacent micro speaker modules are glued and fixed.
The micro speaker module array according to any one of claims 1 to 5, wherein the housing is provided with a detachable connection structure for connecting with the equipment to be assembled.
7. The micro speaker module array of claim 6, wherein the detachable connection structure is a mounting hole provided in the housing, and the mounting hole is used for a fastener to pass through and connect.
An audio-visual equipment, characterized by comprising a display screen body and the micro speaker module array according to any one of claims 1 to 7, wherein the micro speaker module array is mounted on the display screen body.
8. The audio-visual equipment according to claim 8, wherein the micro speaker module array is provided with multiple, and at least one sound hole of the micro speaker module array is exposed on the front of the display screen body, and At least one sound hole of the micro speaker module array is exposed on the back of the display screen body.
The audio-visual equipment according to claim 9, wherein at least one micro speaker module array is provided on the left and right sides and/or the upper and lower sides of the front surface of the display screen body.
The audio-visual equipment according to claim 8, wherein the micro speaker module array is provided with a plurality of, and at least one sound hole of the micro speaker module array is exposed on the side surface of the display screen body, and At least one sound hole of the micro speaker module array is exposed on the back of the display screen body.