WO2021000166A1

WO2021000166A1 - Speaker module

Info

Publication number: WO2021000166A1
Application number: PCT/CN2019/094066
Authority: WO
Inventors: 陈志臣
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2019-06-30
Filing date: 2019-06-30
Publication date: 2021-01-07
Also published as: CN210641054U

Abstract

Provided in the present utility model is a speaker module, comprising an upper cover plate having an accommodating cavity, a lower cover plate disposed opposite to the upper cover plate, and a speaker unit accommodated in the accommodating cavity and secured to the upper cover plate; an upper cover plate bottom wall and an annular sound-absorbing cotton extending from the upper cover plate bottom wall toward the lower cover plate are arranged in the area of the upper cover plate where the speaker unit is not placed; the speaker module also comprises a breathable isolation member secured to the annular sound-absorbing cotton, the upper cover plate bottom wall, the annular sound-absorbing cotton, and the breathable isolation member collectively enclosing an air flow groove, the position of the lower cover plate corresponding to the air flow groove being provided with a lower cover plate bottom wall and a baffle plate extending from the lower plate wall bottom wall to the upper cover plate and abutting the breathable isolation member, the baffle plate, the lower cover plate bottom wall, and the breathable isolation member collectively forming a filling cavity accommodating sound-absorbing material, and the projection of the baffle plate along the assembly direction of the upper cover plate and the lower cover plate being located within the range of the air flow groove, such that the air flow groove and the accommodating cavity and the air flow groove and the filling cavity are in air flow communication by means of the breathable isolation member.

Description

Speaker module

【 Technical Field 】

The utility model relates to the field of electro-acoustic conversion, in particular to a speaker module.

【 Background Technology 】

In a speaker device including a speaker, a housing, and a resonance space, a gas absorbing material, also known as a sound absorbing material, such as activated carbon or zeolite, can be placed therein to improve the sound production of the speaker device. The gas absorption material in the resonance space of the speaker causes a virtual enlargement of the resonance space (Virtual Enlargement) through gas absorption and release, so that the resonance frequency of the speaker device is reduced to a value that can be achieved with a larger resonance space. It is generally used for Enhance the low frequency effect of the speaker.

In general speakers, a special area is set up to place the sound-absorbing material. Research on the area where the speaker is used to place the sound-absorbing material is continuing. The usual research direction is to accommodate more sound-absorbing materials in a limited space and at the same time Taking into account the airflow compliance in the working process of the loudspeaker, how to set the space for the sound-absorbing material and how to make the airflow enter the area of the sound-absorbing material after a longer path has become a problem to be solved by the present invention.

[ Utility model content ]

The purpose of the present invention is to provide a loudspeaker module that can encapsulate more sound-absorbing materials to fully exert the performance of the sound-absorbing materials.

The technical scheme of the utility model is as follows:

The speaker module provided by this embodiment includes an upper cover plate having a receiving cavity, a lower cover plate opened opposite to the upper cover plate, and a speaker unit received in the receiving cavity and fixed to the upper cover plate. The upper cover is provided with a bottom wall of the upper cover and a ring-shaped sound-absorbing cotton fixed to the bottom wall of the upper cover in the area where the speaker unit is not placed. The speaker module further includes The air-permeable spacer of ring-shaped sound-absorbing cotton, the bottom wall of the upper cover plate, the ring-shaped sound-absorbing cotton, and the air-permeable spacer are jointly enclosed to form an airflow groove body, and the lower cover plate corresponds to the position of the airflow groove body A bottom wall of the lower cover plate and a baffle extending from the bottom wall of the lower cover plate toward the upper cover plate and abutting against the air-permeable spacer are provided, the baffle, the bottom wall of the lower cover plate and the air-permeable spacer are common A filling cavity for containing sound-absorbing material is formed, and the projection of the baffle along the assembly direction of the upper cover and the lower cover is located within the range of the airflow groove body, so that the airflow groove body and the receiving cavity are located between the airflow groove body and the receiving cavity. Both the air flow groove body and the filling cavity are in air flow communication through a gas-permeable partition.

Preferably, the ring-shaped sound-absorbing cotton is enclosed to form the groove side wall of the airflow groove body, and the air-permeable spacer is completely covered on the surface of the ring-shaped sound-absorbing cotton facing the bottom wall of the lower cover. The groove top wall of the air flow groove body.

Preferably, the upper cover plate further includes two sets of oppositely opened long-axis side walls and two sets of short-axis side walls oppositely opened and connected to the two sets of long-axis side walls. The baffle and the lower cover plate It is an integral structure, and the opening direction of the baffle is consistent with the opening direction of the side wall of the short axis, and the two ends of the baffle are respectively against the two groups of the long axis sides of the upper cover plate The inner surface of the wall.

Preferably, both sides of the ring-shaped sound-absorbing cotton are further provided with stop posts that cooperate with the baffle to separate the receiving cavity and the filling cavity, and one end of the stop column is fixed on the outer surface of the ring-shaped sound-absorbing cotton. The other end of the stop post extends to the inner surface of the long axis side wall of the upper cover plate.

Preferably, the speaker module further includes a flexible circuit board FPC board with one end electrically connected to the speaker unit and the other end protruding from the short axis side wall of the upper cover.

Preferably, the bottom wall of the lower cover plate is provided with a powder filling hole that is convenient for filling with sound-absorbing material, the powder filling hole is communicated with the filling cavity, and the speaker module further includes being fixed on the powder filling hole. Sealed sealing cover sheet.

Preferably, a leak hole communicating with the filling cavity is further provided on the bottom wall of the lower cover plate, and the hole diameter of the leak hole is smaller than the hole diameter of the powder filling hole.

The beneficial effects of the utility model are:

The speaker module of the present invention puts the sound-absorbing material on the lower cover instead of sharing the space for placing the speaker unit, and can obtain a larger filling cavity to accommodate more sound-absorbing materials. The airflow in the receiving cavity needs to pass through the air-permeable partition and the airflow trough before entering the sound-absorbing material area, which increases the airflow path, improves the airflow compliance, and further improves the sound effect. The size of the filling cavity is not affected by the size of the air-permeable partition, and is determined by the relative position of the baffle and the accommodation space of the upper cover. Compared with the size of the air-permeable partition in the prior art, the filling area of the sound-absorbing material is determined by the utility model. The new type of filling cavity has a larger volume and can maximize the filling area of the sound-absorbing material. The arrangement of the air flow groove body enlarges the contact area between the sound-absorbing material and the sound wave emitted by the speaker unit, and can better exert the function of the sound-absorbing material. The utility model adopts the ring-shaped sound-absorbing cotton as the supporting structure. Under the premise of meeting the hardness requirement, the cost of consumables is low, the processing is easy, and the permeability is good. It cooperates with the air-permeable spacer, and the airflow channel is more smooth, which is beneficial to the airflow transmission.

【 Explanation of drawings 】

Figure 1 is a schematic structural diagram of a speaker module in an embodiment of the utility model;

2 is a schematic diagram of a three-dimensional exploded structure of the speaker module in the embodiment of the utility model;

Figure 3 is a schematic diagram of a partial structure of a speaker module in an embodiment of the utility model;

Figure 4 is a schematic diagram of the structure of the upper cover in the embodiment of the utility model;

Figure 5 is a schematic diagram of the structure of the lower cover in the embodiment of the utility model;

Figure 6 is a cross-sectional view of the speaker module in the embodiment of the utility model along the direction A-A in Figure 1;

FIG. 7 is a partial enlarged view of the components in the area B along the circle B in FIG. 6 of the speaker module in the embodiment of the present invention.

[ Specific embodiments ]

The present utility model will be further explained below in conjunction with the drawings and the embodiments.

Please refer to Figures 1-3. This utility model discloses a speaker module, which includes an upper cover 1 with a receiving cavity 12, a lower cover 2 opened opposite to the upper cover 1, and a The speaker unit 3 is fixed to the upper cover 1. The upper cover 1 is provided with an upper cover bottom wall 17 and a ring-shaped sound-absorbing cotton 11 fixed to the upper cover bottom wall 17 in the area where the speaker unit 3 is not placed. The speaker module 3 also includes a breathable spacer 5 fixed to the ring-shaped sound-absorbing cotton 11. The bottom wall 17, the ring-shaped sound-absorbing cotton 11, and the breathable spacer 5 collectively enclose an airflow groove 111, and the lower cover 2 corresponds to The position of the airflow trough 111 is provided with a lower cover bottom wall 22 and a baffle 21 extending from the lower cover bottom wall 22 toward the upper cover 1 and abutting the breathable partition 5, the baffle 21, the lower cover bottom wall 22 And the air-permeable spacer 5 together constitute a filling cavity 13 containing sound-absorbing materials, and the projection of the baffle 21 along the assembly direction of the upper cover plate 1 and the lower cover plate 2 is located within the range of the airflow groove body 111 so that the airflow groove body 111 and the receiving cavity 12 Both the airflow groove body 111 and the filling cavity 13 are in airflow communication through the air-permeable partition 5.

The breathable spacer 5 is a component that can breathe and play a role in isolation, specifically, it can be a dust-proof mesh, which is a dustproof and acoustic auxiliary used in mobile phones, speakers and other electronic components The material is woven by high-precision looms using polyester and polyester as raw materials. It has the characteristics of variable density, light weight, rigidity, compliance and acoustic resistance. The specific woven material can be one or more of polyethylene terephthalate PET and polyether ether ketone PEEK.

Compared with the prior art, the sound-absorbing material 4 is placed on the lower cover 2 instead of sharing the space where the speaker unit 3 is placed, and a larger filling cavity 13 can be obtained to accommodate more sound-absorbing materials 4. The air flow in the accommodating cavity 12 needs to pass through the air-permeable partition 5 and the air flow trough 111 before entering the area of the sound absorbing material 4, which increases the air flow path, improves the air flow compliance, and further improves the sound effect. The size of the filling cavity 13 is not affected by the size of the air-permeable spacer 5, and is determined by the relative position of the baffle 21 and the accommodation space of the upper cover plate 1. Compared with the size of the air-permeable spacer 5 in the prior art, the size of the sound-absorbing material 4 is determined For the filling area, the volume of the filling cavity 13 of the present invention is larger, and the filling area of the sound-absorbing material 4 can be enlarged as much as possible. The arrangement of the air flow groove 111 enlarges the contact area between the sound-absorbing material 4 and the sound waves emitted by the speaker unit 3, and can better perform the function of the sound-absorbing material 4. Therefore, the present invention can be filled with more sound-absorbing materials 4, and the performance of the sound-absorbing materials 4 can also be better utilized. The ring-shaped sound-absorbing cotton 11 is fixed to the upper cover 1 by double-sided tape, which is easy to process and shape.

6-7, the ring-shaped sound-absorbing cotton 11 encloses the groove side wall 112 of the air flow groove body 111, and the air-permeable spacer 5 is completely covered on the surface of the ring-shaped sound-absorbing cotton 11 facing the bottom wall 22 of the lower cover. The groove top wall 113 of the air flow groove body 111 is formed. One end of the air-permeable spacer 5 in the filling cavity needs to be completely physically separated from the ring-shaped sound-absorbing cotton 11 to prevent the sound-absorbing material from leaking into the airflow trough 111. The other end of the air-permeable spacer 5 separated by the baffle 21 is also covered The ring-shaped sound-absorbing cotton 11 has a supporting effect. Of course, an opening may also be provided between the other end of the breathable spacer 5 and the ring-shaped sound-absorbing cotton 11, which facilitates the air circulation process in the airflow trough 111 and facilitates The sound is better absorbed by the sound-absorbing material, which improves the sound-absorbing effect of the sound-absorbing material.

Please further refer to FIG. 4, the upper cover plate 1 includes two sets of oppositely opened long axis side walls 14 and two sets of short axis side walls 15 oppositely opened and connected to the two sets of long axis side walls 14, a baffle 21 and a lower cover plate 2. It is an integral structure, and the opening direction of the baffle 21 is consistent with the opening direction of the short axis side wall 15, and the two ends of the baffle 21 respectively abut against the inner surfaces of the two sets of long axis side walls 14 of the upper cover 1. The baffle 21 and the lower cover 2 are an integral structure, which is easy to process. The two ends of the baffle 21 are respectively against the long axis side walls 14 of the upper cover 1 to achieve a better sealing effect and avoid powder leakage.

In this embodiment, both sides of the ring-shaped sound-absorbing cotton 11 are also provided with a stop post 16 that cooperates with the baffle 21 to separate the receiving cavity 12 and the filling cavity 13. One end of the stop post 16 is fixed on the outer surface of the ring-shaped sound-absorbing cotton 11. The other end of 16 extends to the inner surface of the long axis side wall 14 of the upper cover plate 1. The height of the stop post 16 is the same as the height of the ring-shaped sound-absorbing cotton 11, and the ring-shaped sound-absorbing cotton 11 is not in contact with the long axis side wall 14 of the upper cover 1. The setting of the stop post can fill the ring-shaped sound-absorbing cotton 11 and the long axis. The gap formed between the side walls 14 can also bear the pressure of the baffle 21 at both ends, reducing the force of the air-permeable spacer 5, and achieve the role of assisting the air-permeable spacer 5 to support the baffle 21.

In this embodiment, the speaker module further includes a flexible circuit board FPC board 6 with one end electrically connected to the speaker unit 3 and the other end protruding from the short axis side wall 15 of the upper cover 1. The FPC board 6 is mainly electrically connected to the speaker unit 3, and realizes the sound production process of the speaker unit 3 through electric signals.

Please further refer to FIG. 5, the bottom wall 22 of the lower cover plate is provided with a powder filling hole 221 that is convenient for filling with the sound-absorbing material 4. The powder filling hole 221 communicates with the filling cavity 13, and the speaker module also includes a powder filling hole 221 fixed on the powder filling hole 221 for sealing The sealing cover sheet 7 is fixed in the powder filling hole 221 by double-sided tape. The bottom wall 22 of the lower cover plate is also provided with a leakage hole 222 communicating with the filling cavity 13, and the hole diameter of the leakage hole 222 is smaller than the hole diameter of the powder filling hole 221. The leakage hole 222 is provided with a cover sheet to avoid powder leakage and at the same time ensure the circulation of air flow. The powder filling hole 221 is mainly used to fill the sound-absorbing material 4.

Further referring to Fig. 6, the assembly direction of the speaker module of the present invention is pointed by the arrow X in Fig. 6, the upper cover 1 is fixed, the speaker unit 3 is first fixed in the X direction, and then the ring sound-absorbing cotton 11 is in the X direction Fix the mesh, and then cover the lower cover 2 in the X direction, and finally pour the sound-absorbing material 4 in the X direction through the powder filling hole 221.

In this embodiment, the upper cover 1 is provided with a sounding through hole 31 that is convenient for the speaker unit 3 to emit sound, and the sounding through hole 31 communicates with the receiving cavity 12. The sounding through hole 31 and the upper cover plate 1 are integrally formed, and mainly play a sound transmission process.

The above are only the embodiments of the present utility model. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present utility model, but these all belong to the present utility model. New scope of protection.

Claims

A speaker module includes an upper cover plate having a receiving cavity, a lower cover plate opened opposite to the upper cover plate, and a speaker unit accommodated in the receiving cavity and fixed to the upper cover plate, characterized in that The upper cover is provided with a bottom wall of the upper cover and a ring-shaped sound-absorbing cotton fixed to the bottom wall of the upper cover in the area where the speaker unit is not placed, and the speaker module further includes a ring fixed to the ring The air-permeable spacer of sound-absorbing cotton, the bottom wall of the upper cover plate, the annular sound-absorbing cotton and the air-permeable spacer are jointly enclosed to form an air flow groove body, and the lower cover plate is provided corresponding to the position of the air flow groove body There is a bottom wall of a lower cover plate and a baffle extending from the bottom wall of the lower cover plate toward the upper cover plate and abutting against the air-permeable spacer, the baffle, the bottom wall of the lower cover plate and the air-permeable spacer are formed together A filling cavity containing a sound-absorbing material, the projection of the baffle along the assembly direction of the upper cover and the lower cover is located within the range of the airflow trough body so that the airflow trough body and the receiving cavity and the Both the air flow groove body and the filling cavity are in air flow communication through a gas-permeable partition.
The speaker module according to claim 1, wherein the ring-shaped sound-absorbing cotton surrounds the groove side wall of the airflow groove body, and the air-permeable spacer is completely covered on the ring-shaped sound-absorbing cotton The groove top wall of the air flow groove body is formed on the surface facing the bottom wall of the lower cover plate.
The speaker module according to claim 1, wherein the upper cover plate further comprises two sets of long-axis side walls oppositely opened and two sets of short-axis side walls oppositely opened and connected to the two long-axis side walls Wall, the baffle and the lower cover are an integral structure, and the opening direction of the baffle is consistent with the opening direction of the side wall of the short axis, and the two ends of the baffle are respectively held against The inner surfaces of the two groups of the long axis side walls of the upper cover plate.
The loudspeaker module according to claim 3, wherein both sides of the ring-shaped sound-absorbing cotton are further provided with stop posts that cooperate with the baffle to separate the receiving cavity and the filling cavity, and the stop posts One end is fixed on the outer surface of the ring-shaped sound-absorbing cotton, and the other end of the stop post extends to the inner surface of the long axis side wall of the upper cover plate.
The speaker module according to claim 3, wherein the speaker module further comprises one end which is electrically connected to the speaker unit and the other end extends from the short axis side wall of the upper cover plate. Flexible circuit board FPC board.
The speaker module according to claim 1, wherein the bottom wall of the lower cover plate is provided with a powder filling hole for filling the sound-absorbing material, the powder filling hole communicates with the filling cavity, and the speaker mold The set also includes a sealing cover sheet fixed on the powder filling hole for sealing.
The speaker module according to claim 6, wherein the bottom wall of the lower cover plate is further provided with a leakage hole communicating with the filling cavity, and the hole diameter of the leakage hole is smaller than the hole diameter of the powder filling hole .