WO2021000182A1

WO2021000182A1 - Loudspeaker module

Info

Publication number: WO2021000182A1
Application number: PCT/CN2019/094082
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: CN210168204U

Abstract

Provided is a loudspeaker module. The loudspeaker module comprises an upper cover plate with a receiving cavity, a lower cover plate, and a loudspeaker unit, wherein the upper cover plate is provided, in an area thereof where the loudspeaker unit is not placed, with a bottom wall of the upper cover plate and a rib which extends from the bottom wall of the upper cover plate toward the lower cover plate; the loudspeaker module further comprises an air-permeable spacer fixed to the rib, wherein the bottom wall of the upper cover plate, the rib, and the air-permeable spacer are jointly enclosed to form an airflow groove body, and the lower cover plate is provided with a baffle; and the loudspeaker module further comprises a reinforcing rib clamped between the baffle and the air-permeable spacer, wherein the baffle, the bottom wall of the lower cover plate and the air-permeable spacer jointly constitute a filling cavity accommodating a sound-absorbing material, and the projection of the baffle along the assembly direction of the upper cover plate and the lower cover plate is located in the range of the airflow groove body, such that the airflow groove body and the receiving cavity, and the airflow groove body and the filling cavity are both in airflow connection by means of the air-permeable spacer.

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 utility model is to provide a speaker module that can encapsulate more DBASS polymer nano powders to give full play to the performance of DBASS polymer nano powders.

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 an upper cover bottom wall and a rib extending from the upper cover bottom wall toward the lower cover in the area where the speaker unit is not placed, and the speaker module further includes The air-permeable spacer fixed to the ribs, the bottom wall of the upper cover plate, the ribs, 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 isolator are provided. The reinforcing ribs between the components, the baffle, the reinforcing ribs, the bottom wall of the upper cover plate, the bottom wall of the lower cover plate, and the air-permeable isolator together constitute a filling cavity containing sound-absorbing materials , The projections of the baffle and the reinforcing ribs along the assembly direction of the upper cover plate and the lower cover plate overlap and are located in the range of the airflow groove body so that the airflow groove body is between the airflow groove body and the receiving cavity And the air flow groove body and the filling cavity are in air flow communication through the air-permeable partition.

Preferably, the reinforcing rib plate is made of stainless steel, and the reinforcing rib plate and the baffle plate and the reinforcing rib plate and the air-permeable partition are all fixedly connected by double-sided tape.

Preferably, the ribs surround the side groove wall forming the air flow groove body, the ribs surround the side groove wall forming the air flow groove body, and the groove side wall is provided with a side wall facing the bottom wall of the lower cover plate. On the top wall of the groove, the air-permeable spacer is completely covered on the top wall of the groove.

Preferably, the upper cover plate includes two sets of oppositely opened long-axis side walls and two sets of short-axis side walls that are oppositely opened and connected to the two sets of long-axis side walls, the opening direction of the baffle and the complement The opening direction of the strong ribs is consistent with the opening direction of the short axis side walls, the two ends of the baffle are respectively against the inner surfaces of the two groups of the long axis side walls of the upper cover plate. The two ends of the reinforcing ribs also respectively abut against the inner surfaces of the two sets of long axis side walls 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 plate.

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

Preferably, the orthographic projection of the stop post on the inner surface of the upper cover is in the orthographic projection of the reinforcing rib on the inner surface of the upper cover, and the reinforcing rib is on the upper cover. The orthographic projection of the inner surface completely coincides with the orthographic projection of the baffle on the inner surface of the upper cover plate.

Preferably, the lower cover plate is provided with a powder filling hole for filling with sound-absorbing material, the powder filling hole is communicated with the filling cavity, and the speaker module further includes a powder filling hole fixed on the powder filling hole for sealing Seal the cover sheet.

Preferably, 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.

Preferably, the upper cover plate is provided with a sounding through hole for facilitating the sound of the speaker unit, and the sounding through hole is in communication with the receiving cavity.

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 spacer, 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 spacer in the prior art, the filling area of the sound-absorbing material DBASS is determined. The volume of the filling cavity of the utility model is larger, and the filling area of the sound-absorbing material can be enlarged as much as possible. 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. Therefore, the utility model can be filled with more sound-absorbing materials, and the performance of the sound-absorbing materials can also be better utilized. Reinforcing ribs are arranged between the baffle and the air-permeable spacer to strengthen the hardness of the contact position of the air-permeable spacer and the baffle, which can compensate for the softer material of the air-permeable spacer, and improve the connection between the air-permeable spacer and the baffle. The sound-absorbing material packaging reliability reduces the risk of powder leakage.

【 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 protrusion extending from the upper cover bottom wall 17 toward the lower cover 2 in the area where the speaker unit 3 is not placed. The rib 11, the speaker module 3 also includes a breathable spacer 5 fixed to the rib 11, the bottom wall 17, the rib 11, and the breathable spacer 5 of the upper cover plate are collectively enclosed to form an airflow groove 111, and the lower cover 2 corresponds to the airflow The position of the tank 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 spacer 5, the baffle 21, the reinforcing rib 7, the upper The bottom wall 17 of the cover plate, the bottom wall 22 of the lower cover plate and the air-permeable spacer 5 jointly constitute a filling cavity 13 containing sound-absorbing materials. The projection of the baffle 21 and the reinforcing rib 7 along the assembly direction of the upper cover plate 1 and the lower cover plate 2 They overlap and are located within the airflow trough body 111 so that the airflow trough body 111 and the receiving cavity 12 and between the airflow trough body 111 and the filling cavity 13 are in air flow communication through the air-permeable partition 5; the speaker module also includes a clamp The reinforcing rib 7 between the plate 21 and the air-permeable spacer 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 speaker module of the present invention places the sound-absorbing material 4 on the lower cover 2 instead of sharing the space for placing the speaker unit 3, and a larger filling cavity 13 can be obtained to accommodate more sound absorption. Material 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. Reinforcing ribs 7 are arranged between the baffle 21 and the air-permeable spacer 5 to strengthen the hardness of the contact position of the air-permeable spacer 5 and the baffle 21, which can compensate for the softer material of the air-permeable spacer 5 and improve the air-permeable spacer 5 The sound-absorbing material 4 at the connection with the baffle 21 is reliable in packaging, which reduces the risk of powder leakage. The convex rib 11 and the upper cover plate 1 are an integral structure, which is easy to process and shape.

6-7, the rib 11 encloses the groove side wall 112 of the air flow groove body 111, the rib 11 surrounds the side groove wall 112 of the air flow groove body, and the groove side wall 112 is provided with a bottom facing the lower cover plate. The groove top wall 113 of the wall 22 and the air-permeable spacer 5 completely cover the groove top wall 113. One end of the air-permeable spacer 5 in the filling cavity needs to be completely physically separated from the rib 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 with the rib 11, in order to achieve a supporting effect. Of course, an opening can also be provided between the other end of the air-permeable spacer 5 and the rib 11, which is beneficial to the air circulation process in the air flow trough 111 and is beneficial to the sound being better absorbed. Material absorption improves the sound-absorbing effect of sound-absorbing materials.

In this embodiment, the reinforcing rib 7 is made of stainless steel, and both the reinforcing rib 7 and the baffle 21 and the reinforcing rib and the air-permeable spacer 5 are fixedly connected by double-sided adhesive. The two sides of the reinforcing ribs 7 are respectively seamlessly connected with the baffle 21 and the air-permeable spacer 5, so as to form a whole with the air-permeable spacer 5, and play a role in strengthening the compression resistance. Of course, the present invention is not limited to the use of double-sided tape, and other methods can also be used to achieve the fixation of the reinforcing rib 7.

Please further refer to Figures 4-5. The upper cover 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. The opening direction of the baffle 21 And the opening direction of the reinforcing ribs 7 is consistent with the opening direction of the short-axis side walls 15. The two ends of the baffle 21 respectively abut against the inner surfaces of the two groups of long-axis side walls 14 of the upper cover plate 1, and the reinforcing ribs The two ends of the plate 7 also abut against the inner surfaces of the two sets of long axis side walls 14 of the upper cover plate 1 respectively. The baffle 21 and the lower cover 2 are an integral structure, which is easy to process. The opening direction of the baffle 21 is consistent with the opening direction of the short axis side wall 15. Such a baffle 21 has the shortest use length and can fill the isolated space of the cavity 13 To maximize, the two ends of the baffle 21 are respectively held against the long axis side walls 14 of the upper cover plate 1 to achieve a better sealing effect and avoid powder leakage.

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.

In this embodiment, both sides of the rib 11 are also provided with stop posts 16 that cooperate 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 rib 11, and the other end of the stop post 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 rib 11, and the rib 11 is not in contact with the long axis side wall 14 of the upper cover plate 1. The arrangement of the stop post can fill the gap between the rib 11 and the long axis side wall 14 At the same time, it 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 orthographic projection of the stop post 16 on the inner surface of the upper cover 1 is in the orthographic projection of the reinforcing rib 7 on the inner surface of the upper cover 1, and the reinforcing rib 7 is on the inner surface of the upper cover 1. The orthographic projection and the orthographic projection of the baffle 21 on the inner surface of the upper cover plate 1 completely coincide. The transverse cross-sectional area of the reinforcing rib 7 and the baffle 21 are equal, which can minimize the use of consumables. The lateral cross-sectional area of the stop post 16 coincides with the reinforcing rib 7, which can ensure the support strength requirement and minimize the floor space of the stop post 16.

In this embodiment, the bottom wall 22 of the lower cover plate is provided with a powder filling hole 221 that is convenient for filling the sound-absorbing material 4, the powder filling hole 221 communicates with the filling cavity 13, and the speaker module also includes a speaker module fixed on the powder filling hole 221 for sealing The sealing cover piece 8. The lower cover plate 2 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 powder filling hole 221 is mainly used to fill the sound-absorbing material 4. 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.

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 net is fixed on the rib 11 in the X direction Then, fix the reinforcing rib 7 on the mesh cloth, 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.

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 rib extending from the bottom wall of the upper cover toward the lower cover in the area where the speaker unit is not placed, and the speaker module further includes a fixing In the air-permeable spacer of the ribs, the bottom wall of the upper cover plate, the ribs, and the air-permeable spacer are jointly surrounded to form an air flow groove body, and the lower cover plate is provided at a position corresponding to 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 speaker module further includes a baffle clamped on the baffle and the air-permeable spacer The baffle plate, the reinforcing rib plate, the bottom wall of the upper cover plate, the bottom wall of the lower cover plate, and the air-permeable spacer jointly constitute a filling cavity containing sound-absorbing materials, The projections of the baffle and the reinforcing ribs along the assembly direction of the upper cover and the lower cover overlap and are located in the range of the airflow groove body so that the airflow groove body and the receiving cavity are between and 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 reinforcing rib is made of stainless steel, and between the reinforcing rib and the baffle, and the reinforcing rib and the air-permeable isolation The parts are fixedly connected by double-sided tape.
The speaker module according to claim 2, wherein the ribs surround the side groove wall forming the air flow groove body, and the groove side wall is provided with a groove top wall facing the bottom wall of the lower cover plate , The air-permeable spacer completely covers the top wall of the groove.
The speaker module according to claim 2, wherein the upper cover plate comprises two sets of long axis side walls that are oppositely opened and two sets of short axis sidewalls that are oppositely opened and connect the two sets of long axis side walls. , The opening direction of the baffle plate and the opening direction of the reinforcing rib plate are consistent with the opening direction of the side wall of the short axis, and the two ends of the baffle plate respectively abut against the two groups of the upper cover plate On the inner surface of the long axis side wall, the two ends of the reinforcing rib plate also respectively abut against the inner surfaces of the two groups of the long axis side walls of the upper cover plate.
The speaker module according to claim 4, 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 4, characterized in that, on both sides of the ribs are further provided with a stop post that cooperates with the baffle to separate the receiving cavity and the filling cavity, and one end of the stop post is fixed On the outer surface of the rib, 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 6, wherein the orthographic projection of the stop post on the inner surface of the upper cover is in the orthographic projection of the reinforcing rib on the inner surface of the upper cover, The orthographic projection of the reinforcing rib on the inner surface of the upper cover completely coincides with the orthographic projection of the baffle on the inner surface of the upper cover.
The speaker module according to claim 1, wherein the lower cover plate is provided with a powder filling hole for filling with sound-absorbing material, the powder filling hole communicates with the filling cavity, and the speaker module is also It includes a sealing cover sheet fixed on the powder filling hole for sealing.
8. The speaker module according to claim 8, wherein 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.