WO2021129185A1

WO2021129185A1 - Sound generating device module and electronic product

Info

Publication number: WO2021129185A1
Application number: PCT/CN2020/126932
Authority: WO
Inventors: 李洪杰; 刘影男; 鲁路路
Original assignee: 歌尔股份有限公司
Priority date: 2019-12-27
Filing date: 2020-11-06
Publication date: 2021-07-01
Also published as: CN110958509A

Abstract

Disclosed are a sound generating device module and an electronic product. The sound generating device module comprises: a module housing, a sound discharge hole being formed on the module housing, and the sound discharge hole being in communication with the interior of the module housing; a mesh cloth assembly, the mesh cloth assembly comprising a cover plate, a mesh cloth and an adhesive layer; the cover plate has an adhesive surface, an air guide passage is formed on the cover plate, an inner opening of the air guide passage is located on the adhesive surface, an outer opening of the air guide passage is configured to communicate with the outside, and the mesh cloth is provided at the inner opening; and the mesh cloth assembly is bonded and secured onto the module housing by means of the adhesive layer, and the inner opening is in communication with the sound discharge hole.

Description

Sound device module and electronic product

Technical field

The present invention belongs to the technical field of electro-acoustic conversion. Specifically, the present invention relates to a sound-generating device module and an electronic product.

Background technique

In recent years, consumer electronic products have developed rapidly, and electronic devices such as mobile phones and tablet computers have been widely used by consumers. Among them, the speaker is an important acoustic component in electronic products, which is used to convert electrical signals into sound for consumers to listen to. With the rapid development of related technologies of electronic products, consumers have put forward higher performance requirements for the acoustic performance of electronic products. In this case, those skilled in the art need to make corresponding improvements to the acoustic device.

The speakers used in consumer electronic products are small in size. The acoustic performance such as the resonant frequency and bass performance of the speaker is affected by the volume of the speaker. In practical applications, a relatively large speaker back cavity can better improve the acoustic performance of the speaker. In addition, the space inside the loudspeaker needs to allow sound and air flow to pass, and the loudspeaker needs to be provided with structures such as pressure relief holes communicating with the outside. If the overall size of the speaker is small, the air flow space will be complicated, which does not meet the air circulation requirements of the acoustic performance, which will adversely affect the resonance frequency of the speaker and the sensitivity of the speaker diaphragm.

Summary of the invention

An object of the present invention is to provide an improved sound generating device module.

According to the first aspect of the present invention, a sound device module is provided, including:

A module housing, a sound leakage hole is formed on the module housing, and the sound leakage hole communicates with the inside of the module housing;

Mesh assembly, the mesh assembly includes a cover plate, mesh and adhesive layer;

The cover plate has an adhesive surface, an air channel is formed on the cover plate, the inner opening of the air channel is located on the adhesive surface, and the outer opening of the air channel is configured to communicate with the outside , The mesh cloth is set at the inner opening;

The mesh cloth component is adhesively fixed on the module housing through the glue layer, and the inner through opening is in communication with the sound leakage hole.

Optionally, a strip groove is provided on the sticking surface, the strip groove extends to the edge of the cover plate, the glue layer covers the sticking surface, and the glue layer and the strip The groove combination constitutes the air guiding channel, and one end of the strip groove extending to the edge of the cover plate serves as the outer through opening.

Optionally, the strip-shaped groove forms a pattern depression at one end located in the sticking surface, the size of the pattern depression is greater than the width of the strip-shaped groove, and the pattern depression serves as the inner through opening.

Optionally, the graphic depression is rectangular, circular or triangular.

Optionally, the size of the pattern depression is larger than the size of the sound leakage hole.

Optionally, the adhesive layer includes a first adhesive layer, the first adhesive layer covers the adhesive surface, and the first adhesive layer is formed with a first through hole at a position corresponding to the inner through hole , The mesh cloth is attached to the side of the first adhesive layer away from the adhesive surface.

Optionally, the adhesive layer includes a second adhesive layer, the second adhesive layer is pasted on a side of the first adhesive layer away from the adhesive surface, and a second adhesive layer is provided on the second adhesive layer. The size of the second through hole and the mesh cloth is larger than the size of the first through hole, and the mesh cloth is located at the second through hole.

Optionally, the size of the mesh cloth is larger than the size of the first through hole.

Optionally, the size of the mesh cloth is larger than the size of the sound leakage hole.

The present invention also provides an electronic product, including:

A product body, where a sound hole is formed on the product body;

In the above-mentioned sounding device module, the sounding device module is arranged in the product body, the sounding device module is configured to work to produce sound, and the sound hole is for sound to be transmitted.

A technical effect of the present invention is to improve the sound venting structure of the sound device module, thereby improving the acoustic performance of the sound device module.

Through the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings, other features and advantages of the present invention will become clear.

Description of the drawings

The drawings incorporated in the specification and constituting a part of the specification illustrate the embodiments of the present invention, and together with the description are used to explain the principle of the present invention.

Figure 1 is an exploded schematic diagram of the mesh assembly of the sound device module provided by the present invention;

Figure 2 is a schematic diagram of the overall structure of the mesh assembly provided by the present invention;

3 is a schematic diagram of the structure of the sticking surface of the mesh cloth component provided by the present invention;

Fig. 4 is a schematic side sectional view of the mesh cloth assembly provided by the present invention.

Detailed ways

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless specifically stated otherwise, the relative arrangement of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention.

The following description of at least one exemplary embodiment is actually only illustrative, and in no way serves as any limitation to the present invention and its application or use.

The technologies, methods, and equipment known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be regarded as part of the specification.

In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiment may have different values.

It should be noted that similar reference numerals and letters indicate similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in the subsequent drawings.

The present invention provides a sound generating device module. The sound generating device module includes a module housing and a mesh assembly. The module housing is used for accommodating components in the sound device module. For example, a sound generating device assembly including a diaphragm and a magnetic circuit system can be arranged in the module housing, and the sound generating device assembly can vibrate to generate sound after being connected to a sound signal, and the sound generated can be transmitted from the module housing . The sound device module can usually be used as a speaker or earpiece in electronic products such as mobile phones and tablet computers.

A sound leakage hole may be formed on the module housing, and the sound leakage hole is in communication with the internal structure of the module housing. When the sound device module is actually working, the diaphragm will vibrate to produce sound. Due to the vibration of the diaphragm, the air on both sides of the diaphragm will produce air pressure changes. Wherein, the air connecting the diaphragm to the side of the sound outlet can communicate with the outside through the sound outlet, thereby releasing the pressure generated by the air pressure change. However, the air connected to the inner side of the module housing by the diaphragm is often difficult to directly communicate with the outside, and the pressure generated by the air pressure change is difficult to release. The sound vent holes on the module housing can lead out the airflow inside the module housing, thereby releasing the pressure formed inside the module housing. Furthermore, it avoids problems such as a decrease in the vibration sensitivity of the diaphragm and limited amplitude due to the difference in air pressure on both sides of the diaphragm.

As shown in Fig. 1, the mesh cloth assembly includes a cover plate 1, a mesh cloth 3 and a glue layer. An air guide channel is formed in the mesh cloth assembly. The mesh assembly is used for mounting on the module housing, one end of the air guiding channel is connected with the sound leakage hole, and the other end of the air guiding channel is connected with the outside. Through the cooperation of the air guide channel and the sound vent hole, the buffer pressure of the sound vent hole and the effect of absorbing sound vibration can be improved, thereby improving the acoustic performance of the sound device module. Figure 2 shows the state of the mesh assembly when assembled, the lower surface of the mesh assembly shown in Figure 2 can be directly fixed on the outer surface of the module housing, so that the air guide channel and The sound leakage holes are in butt connection and communication.

As shown in FIGS. 1 and 3, the cover plate 1 has an adhesive surface 11. In this embodiment, the air guide channel is formed on the cover plate 1. The inner through opening 102 (one end) of the air guiding channel is located on the sticking surface 11. The outer port 101 (the other end) of the air guide channel communicates with the outside. Through this design, the air guide channel constitutes a complete passage in the cover plate 1 so that air can circulate and the pressure generated by the vibration of the diaphragm is relieved. The mesh cloth 3 is arranged at the inner opening 102, and the mesh cloth 3 is used to provide a damping effect. On the one hand, it can absorb vibration, and on the other hand, it can let air pass through, thereby achieving a pressure relief effect.

The mesh cloth component is pasted and fixed on the module housing through the glue layer, and the inner through port is connected with the sound leakage hole. In this way, when the diaphragm vibrates, the air inside the module housing can transmit vibration and air pressure to the sound vent. The mesh cloth plays a role of absorbing, isolating and buffering vibration, and the air can pass through the mesh cloth to form convection with the air guide channel and the external environment to release air pressure. The technical scheme of the present invention effectively plays the role of balancing airflow and improving sound compliance. The air guide channel further plays a role of guiding the air, increases the acoustic resistance, reduces the resonance frequency of the sound device module, and effectively improves the acoustic performance.

Optionally, the cover plate is formed by injection molding of a plastic material, which can reduce the difficulty of forming the air guide channel in the cover plate from a technological perspective, and it is easier to form the air guide channel with a predetermined shape according to the requirements of acoustic performance.

Optionally, as shown in FIGS. 3 and 4, the sticking surface 11 is provided with a strip groove 111, and the strip groove 111 extends from the central area of the cover plate 1 to the edge of the cover plate 1. The adhesive layer covers the adhesive surface 11. In this embodiment, the glue layer is covered on the strip groove 111, which together with the strip groove 111 forms the air guide channel. One end of the strip groove 111 that extends to the edge of the cover plate 1 serves as the outer through opening 101. One end of the strip-shaped groove 111 located on the central area of the cover plate 1 serves as the inner through opening 102. The advantage of this embodiment is that the formation of the air guide channel is less difficult, and it is easier to form a predetermined curved shape according to the requirements of acoustic performance.

In other embodiments, the air guide channel may also be directly opened inside the cover plate. For example, one end of the air guide channel is located on the adhesive surface, and the air guide channel is curved and extends in the thickness direction of the cover plate, and then extends from the upper surface of the cover plate opposite to the adhesive surface. The external port is formed to form a communication relationship with the outside world.

Optionally, as shown in FIG. 3, the strip-shaped groove 111 forms a pattern depression at one end located in the central area of the sticking surface 11. The size of the pattern depression is greater than the width of the strip groove 111. The graphic depression serves as the inner opening 102 of the air guide channel. By forming a large-sized graphic recess, the inner through opening 102 of the air guide channel can be more easily formed abutting relationship with the sound bleed hole, and the internal error caused by the assembly error between the mesh component and the module housing can be reduced. The problem that the port cannot be accurately connected to the sound vent. On the other hand, the inner port is designed to have a wider size, which can better guide air and relieve pressure.

Optionally, in the embodiment shown in FIG. 3, the graphic depression is circular. In other embodiments, the pattern depression may also be rectangular or triangular. The specific shape of the graphic recess can be changed depending on factors such as the docking manner of the sound leakage hole and the graphic recess, the internal port 102 required by the acoustic performance, and the shape of the air guide channel. Different shapes of graphic depressions produce different acoustic properties.

Optionally, in the embodiment where the graphic depression is circular, the diameter of the graphic depression may be in the range of 0.6-0.8 mm, and correspondingly, the diameter of the pressure relief hole may be in the range of 0.3 mm-0.4 mm. This design method can ensure the docking relationship between the pressure relief hole and the inner through opening 102, and can also better play the role of air diversion. Optionally, the size of the pattern depression is larger than the size of the sound leakage hole.

As shown in FIGS. 1 and 4, the adhesive layer may include a first adhesive layer 21. The first adhesive layer 21 covers the adhesive surface 11, and the first adhesive layer 21 has a first through hole 211 formed at a position corresponding to the inner through opening 102. The mesh cloth 3 can be attached to the side of the first adhesive layer 21 away from the adhesive surface 11. In this embodiment, the first adhesive layer directly functions to fix the mesh cloth 3 on the side of the sticking surface 11. On the other hand, the cover plate with the first adhesive layer can be directly attached to the module housing. The first through hole 211 is used to allow air to pass through.

Optionally, the adhesive layer may further include a second adhesive layer 22. The second adhesive layer 22 is pasted on the side of the first adhesive layer 21 away from the pasting surface 11. Since the mesh cloth 3 is pasted on the first adhesive layer 21, when the first adhesive layer 21 is directly used for bonding to the module housing, the thickness of the mesh cloth 3 will cause a certain obstacle to the adhesion. . In a preferred embodiment, as shown in FIG. 4, by providing the second adhesive layer 22, the adhesion interference caused by the mesh cloth 3 can be reduced or eliminated. The second adhesive layer 22 is provided with a second through hole 221, and the size of the second through hole 221 can match the size of the mesh 3. The size of the second through hole 221 and the mesh cloth 3 is optionally larger than the size of the first through hole 211. In this way, the mesh cloth can potentially be located at the second through hole, that is, the second through hole plays a role of accommodating the mesh cloth, thereby reducing the effect of the mesh cloth on sticking the cover plate to the module housing. Hinder interference.

Designing the size of the second through hole 221 and the mesh cloth 3 to be larger than the first through hole 211 helps to reduce the difficulty in assembling and positioning the second adhesive layer, the mesh cloth 3 and the first through hole 211.

By combining the first adhesive layer and the second adhesive layer to form the adhesive layer, the mesh cloth 3 can be effectively contained therein, and the cover plate is bonded and fixed to the module shell through the second adhesive layer Physically.

Optionally, the thickness of the mesh cloth 3 may be less than or equal to the thickness of the second adhesive layer, which can further eliminate the obstacle of the mesh cloth 3 from sticking the adhesive layer to the module housing.

Optionally, in other embodiments, the size of the mesh cloth may also be designed to be larger than the size of the first through hole. Optionally, the size of the mesh cloth may be designed to be larger than the size of the sound leakage hole. On the one hand, the damping effect is improved, and it plays a good role in absorbing vibration. On the other hand, the positioning difficulty between the mesh and the first through hole and the sound vent hole is reduced, and the functional reliability of the product is improved.

Optionally, in an embodiment in which a strip-shaped groove is combined with the adhesive layer to form the air guide channel, the adhesive layer may also be formed with a gap at the outer through opening 101, so that the outer through The opening 101 does not completely cover the strip groove. This implementation manner can make the outer opening present an open structural feature, improve the smoothness of the air guide channel communicating with the outside, and improve the pressure relief capability of the air guide channel.

The present invention also provides an electronic product, which includes a product main body and the above-mentioned sound device module. The product body is provided with a sound hole. The main body of the product may be a mobile phone, a tablet computer, a headset, and the like. The sound device module is arranged inside the product theme. The sound device module is configured to be able to pass in a sound signal and then work to produce sound, and the sound hole is for the sound generated by it to pass out.

The mesh assembly is fixed on the module housing of the sound device module, and is fixed inside the product body together with the sound device module. The external opening can be connected to the large internal cavity of the product body, and further communicate with the external space through the gaps and openings on the product body.

Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the invention is defined by the appended claims.

Claims

A sound device module, characterized in that it comprises:

A module housing, a sound leakage hole is formed on the module housing, and the sound leakage hole communicates with the inside of the module housing;

Mesh assembly, the mesh assembly includes a cover plate, mesh and adhesive layer;

The cover plate has an adhesive surface, an air channel is formed on the cover plate, the inner opening of the air channel is located on the adhesive surface, and the outer opening of the air channel is configured to communicate with the outside , The mesh cloth is set at the inner opening;

The mesh cloth component is adhesively fixed on the module housing through the glue layer, and the inner through opening is in communication with the sound leakage hole.
The sounding device module according to claim 1, wherein a strip groove is formed on the sticking surface, the strip groove extends to the edge of the cover plate, and the glue layer covers the sticking surface. On the surface, the adhesive layer and the strip-shaped groove are combined to form the air guiding channel, and one end of the strip-shaped groove extending to the edge of the cover plate serves as the outer opening.
The sound device module according to claim 2, wherein the strip-shaped groove forms a pattern depression at one end located in the sticking surface, and the size of the pattern depression is larger than the width of the strip-shaped groove. The pattern depression serves as the inner port.
4. The sound device module of claim 3, wherein the pattern depression is rectangular, circular or triangular.
4. The sound device module of claim 3, wherein the size of the pattern depression is larger than the size of the sound leakage hole.
The sound device module according to claim 1, wherein the adhesive layer comprises a first adhesive layer, the first adhesive layer covers the sticking surface, and the first adhesive layer corresponds to the A first through hole is formed at the position of the inner through opening, and the mesh cloth is pasted on the side of the first adhesive layer away from the pasting surface.
The sound device module according to claim 6, wherein the glue layer comprises a second glue layer, and the second glue layer is pasted on a side of the first glue layer away from the sticking surface, The second adhesive layer is provided with a second through hole, the size of the second through hole and the mesh is larger than the size of the first through hole, and the mesh is located at the second through hole.
The sound device module according to claim 1, wherein the size of the mesh cloth is larger than the size of the first through hole.
The sound device module according to claim 1, wherein the size of the mesh cloth is larger than the size of the sound leakage hole.
An electronic product, characterized in that it includes:

A product body, where a sound hole is formed on the product body;

The sounding device module according to any one of claims 1-9, the sounding device module is arranged in the product body, the sounding device module is configured to work to produce sound, and the sound hole is for sound Outgoing.