CN221448566U - Audio module and terminal device - Google Patents

Abstract

The disclosure relates to an audio module and a terminal device. The audio module comprises an audio component and is used for being arranged opposite to a sound outlet of equipment to be installed of the audio module; a diaphragm support structure disposed between the sound outlet and the audio component, having a diaphragm assembly including a deformed first state and an undeformed second state; wherein the barrier capability of the diaphragm assembly to the audio sound volume in the first state is greater than the barrier capability of the diaphragm assembly to the audio sound volume in the second state. The diaphragm assembly is arranged in the audio module, and the acoustic impedance is increased when the diaphragm assembly is in the deformed first state, so that the audio volume output by the sound outlet of equipment to be installed in a conversation scene is reduced, and the leakage of conversation information is reduced.

Description

Audio module and terminal device

Technical Field

The present disclosure relates to the field of audio output, and in particular to an audio module and a terminal device.

Background technique

At present, with the continuous upgrading of terminal products, the requirements for the audio output effect of terminal devices are getting higher and higher; in order to improve the volume and stereo effect of external audio, the relevant technology provides a solution that integrates the earpiece mode and the speaker mode in the earpiece structure. The above solution makes a hole processing on the top of the terminal device, so that when the terminal device is in the audio external speaker scenario, the audio component in the earpiece structure can be used to produce sound to increase the external speaker volume.

However, for the above-mentioned two-in-one solution of earpiece mode and speaker mode, when the terminal device is in a call scenario, in order to ensure that the caller can hear the transmitted voice clearly, a certain sound signal amplitude output needs to be maintained. At this time, part of the top sound of the earpiece structure will leak to the vicinity of the caller, thereby causing call information leakage and bringing a bad experience to the user.

Utility Model Content

In order to overcome the above problems raised by the related art, the present disclosure provides an audio module and a terminal device. The audio module proposed in the present disclosure is provided with a diaphragm assembly, and the acoustic impedance is increased when the diaphragm assembly is in a first state of deformation, so as to reduce the audio volume output from the sound outlet of the device to be installed in a call scenario, thereby reducing the leakage of call information.

The present disclosure provides an audio module, which includes:

An audio component, used to be arranged opposite to the sound outlet of the device to be installed of the audio module;

A diaphragm support structure, disposed between the sound outlet and the audio component, having a diaphragm component, wherein the diaphragm component includes a first state of deformation and a second state of non-deformation;

Wherein, the blocking capability of the diaphragm assembly to the audio volume in the first state is greater than the blocking capability of the diaphragm assembly to the audio volume in the second state.

In some embodiments, the diaphragm support structure further comprises:

A conductive component, disposed on the diaphragm component;

Wherein, when the conductive component is in a power-on state, the diaphragm component is in the first state; when the conductive component is in a power-off state, the diaphragm component is in the second state.

In some embodiments, the conductive component is at least one group;

A group of the conductive components includes two conductive sheets, and the two conductive sheets are respectively arranged on the surface of the diaphragm component facing the sound outlet and the surface of the diaphragm component facing the audio component.

In some embodiments, the conductive component includes two groups;

The two groups of conductive components are respectively distributed at two opposite ends of the diaphragm component along the setting direction of the diaphragm component.

In some embodiments, the diaphragm support structure further comprises:

A supporting layer, disposed between the audio component and the diaphragm component, connecting and supporting the diaphragm component;

The supporting layer has a first opening, and the first opening is aligned with the sound outlet;

Wherein, the projection of the diaphragm assembly toward the supporting layer covers the first opening.

In some embodiments, the diaphragm support structure further comprises:

A first fixing layer, connected between the supporting layer and the diaphragm assembly, and fixing the diaphragm assembly to the supporting layer;

The first fixing layer has a second opening, and the second opening is aligned with the first opening.

In some embodiments, the diaphragm support structure further comprises:

A second fixing layer is disposed between the diaphragm assembly and the sound outlet, connects and supports the diaphragm assembly and fixes the diaphragm assembly to the housing of the device to be installed;

The second fixing layer has a third opening, and the third opening is aligned with the second opening.

In some embodiments, the first opening, the second opening, and the third opening are the same size.

In some embodiments, a surface of the first fixing layer and/or the second fixing layer is adhesive.

In some embodiments, the material of the diaphragm assembly is a piezoelectric material.

The present disclosure also provides a terminal device, including at least:

A housing having a sound outlet;

The audio module proposed in the above embodiment of the present disclosure is located in the housing; the audio component of the audio module is arranged opposite to the sound outlet;

Among them, when the terminal device is in a call scenario, the diaphragm assembly of the audio module is in a first state; when the terminal device is in an audio external speaker scenario, the diaphragm assembly is in a second state.

In some embodiments, the terminal device further includes:

An electric control module is located in the housing, spaced apart from the audio module, and electrically connected to a conductive component of the audio module;

Wherein, the electric control module supplies power to the conductive component when the terminal device is in the call scenario; and cuts off power to the conductive component when the terminal device is in the audio external speaker scenario.

In some embodiments, the housing includes a middle frame;

The middle frame has a mounting groove, and the bottom of the mounting groove is connected to the sound outlet;

The second fixing layer of the diaphragm support structure is connected between the bottom of the mounting groove and the diaphragm assembly;

The supporting layer of the diaphragm supporting structure is assembled in the mounting groove.

The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

A diaphragm assembly is provided in the audio module proposed in the embodiment of the present disclosure. The diaphragm assembly is provided between the audio assembly and the sound outlet of the terminal device, and has a first deformed state and a second undeformed state; and the diaphragm assembly has different blocking capabilities for audio volume when in different states. In this way, the audio module can change the audio volume output from the sound outlet of the device to be installed based on the morphological change of the diaphragm assembly; in this way, when the device to be installed is in a call scene, the diaphragm assembly can reduce the audio volume output from the sound outlet, thereby reducing the leakage of call information; when the device to be installed is in an audio external speaker scene, the diaphragm assembly can prompt the sound outlet to output audio with normal volume, thereby stabilizing the audio external speaker effect; and the structural complexity and preparation cost of the diaphragm assembly are low, thereby further improving the practicality of the audio module.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

FIG1 is a schematic cross-sectional view showing the structure of an audio module according to an exemplary embodiment;

FIG2 is a schematic diagram showing the connection between a diaphragm assembly and a conductive sheet according to an exemplary embodiment;

FIG3 is a structural schematic diagram 1 of a diaphragm support structure according to an exemplary embodiment;

FIG4 is a second structural schematic diagram of a diaphragm support structure according to an exemplary embodiment;

FIG5 is a schematic diagram showing the working principle of an electric control module according to an exemplary embodiment;

Fig. 6 is a structural block diagram of a terminal device according to an exemplary embodiment.

The reference numerals in Figures 1 to 4 are as follows:

1. Sound outlet; 2. Audio component; 3. Diaphragm support structure; 31. Diaphragm component; 32. Conductive component; 321. Conductive sheet; 33. Signal transmission component; 34. Support layer; 35. First fixed layer; 36. Second fixed layer; 361. Third opening; 4. Middle frame; a. Setting direction.

Detailed ways

Here, exemplary embodiments will be described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the utility model. Instead, they are only examples of devices and methods consistent with some aspects of the utility model.

For the earpiece structure design of the two-in-one earpiece mode and speaker mode, the audio component in the earpiece structure is used as the sound-emitting unit; the audio component and the front shell of the earpiece structure form a speaker component. In some examples, the speaker component forms a front cavity with the middle frame of the terminal device, and forms a rear cavity with the rear shell of the terminal device; in other examples, the speaker component forms a front cavity with the middle frame of the terminal device, and a rear shell is separately provided on the earpiece structure as a rear cavity; the speaker component realizes the speaker mode of the earpiece structure by cooperating with the front cavity and the rear cavity. It should be noted that the frequency, volume and loudness of the audio output by the audio component are different when the earpiece structure is in speaker mode and in earpiece mode.

At present, the above-mentioned earpiece structure design is usually set on the top of the terminal device; the earpiece structure can be used to make sound in the audio playback scenario; when the terminal device structure stacking space is insufficient, by integrating the speaker and the earpiece, the structure occupancy of the opening at the bottom of the terminal device for placing the speaker is reduced, thereby increasing the space utilization rate of the terminal device; when the terminal device structure stacking space is considerable, it can work together with the speaker at the bottom of the terminal device to achieve the effect of dual speakers, thereby improving the stereo effect of the terminal device in the audio playback scenario.

However, for the above-mentioned earpiece structure design, in a call scenario, the audio component will produce sound leakage, thus affecting the privacy of the call. At present, the following example solutions can be used to improve the problem of sound leakage; in some examples, the top hole design of the terminal device is abandoned to solve the sound leakage problem in the call scenario; however, the loudness of this solution in the audio external speaker scenario is poor; in other examples, by utilizing the screen sound of the terminal device and cooperating with the top hole solution of the terminal device, the screen sound is used when the terminal device is in a call scenario to solve the problem of call sound leakage; and in the audio external speaker scenario, the audio component in the top earpiece structure is used to generate sound to ensure the external speaker volume; however, the call experience of this solution is poor, and the playback voice quality of the screen sound is limited by the principle of excited sound generation, which affects the volume and sound quality of the call, and the structure is complex and the computational cost of audio adjustment is high; in some other examples, it is achieved by redesigning the sound device. For example, a dual voice coil dipole speaker plus a designated whole-machine sound transmission channel is used to ensure the external speaker experience while solving the sound leakage problem; in this solution, the dual voice coil dipole speaker ensures that the two sound signals are output from the narrow slit and the top, respectively. When the terminal device is in a call scenario, the two sound signals are output in reverse phase to offset the sound signal leaked from the top opening. When the terminal device is in the audio external speaker scenario, the two sound signals are output in phase to improve the sound external speaker experience. However, the structure of this solution is relatively complex and the preparation cost is high.

In order to overcome the above problems, the present disclosure proposes an audio module. Referring to FIG. 1 , FIG. 1 is a cross-sectional schematic diagram of the structure of an audio module according to an exemplary embodiment; as shown in FIG. 1 , the audio module proposed in the embodiment of the present disclosure includes:

An audio component 2 is arranged opposite to a sound outlet 1 of a device to be installed in the audio module;

The diaphragm support structure 3 is arranged between the sound outlet 1 and the audio component 2, and has a diaphragm component (not shown in FIG. 1 ), and the diaphragm component includes a first state of deformation and a second state of non-deformation;

The blocking capability of the diaphragm assembly to the audio volume in the first state is greater than the blocking capability of the diaphragm assembly to the audio volume in the second state.

Here, the audio module proposed in the present disclosure is set in a device to be installed with an audio output function; the device to be installed includes a terminal device, such as a mobile phone or a tablet computer. The audio module is set on the top of the terminal device. When the terminal device is in a call scene, the audio module works in the handset mode, the diaphragm assembly is in a first state of deformation, and the acoustic impedance increases, thereby reducing the audio volume output from the sound outlet and reducing the leakage of call information; when the terminal device is in an audio external speaker scene, the audio module works in the speaker mode, the diaphragm assembly is in a second state of non-deformation, and the acoustic impedance is reduced, thereby reducing the obstruction to the audio output and ensuring the effect of the audio external speaker.

In the present disclosure, when the audio module works in speaker mode, the audio component outputs external audio; when the audio module works in receiver mode, the audio component outputs call audio; here, the frequency, volume and loudness of the external audio are greater than the frequency, volume and loudness of the call audio.

In conjunction with Figure 1, the audio component 2 and the sound outlet 1 of the terminal device are arranged relative to each other, and the audio output by the audio component 2 is output to the sound outlet 1 through the sound outlet channel between the audio component 2 and the sound outlet 1, and is output to the outside of the terminal device through the sound outlet 1. In the present disclosure, the audio module can be used as a handset structure of a terminal device, having a shell, and the shell is installed in the shell of the terminal device, for example, installed on the middle frame of the terminal device. Among them, the audio component is installed in the shell, and the diaphragm assembly is installed on the shell. Here, the shell includes a front shell and a rear shell, and the audio component is arranged in the front shell, and forms a speaker assembly with the front shell. The sound outlet channel is surrounded by the rear shell of the audio module and the audio component, and the diaphragm support structure is connected to the rear shell and is located at one end of the sound outlet channel facing the sound outlet; here, the fixedly connected diaphragm support structure and the part of the rear shell are assembled together in the mounting groove formed by the middle frame of the terminal device.

In the present disclosure, the diaphragm support structure includes a diaphragm assembly and a fixing member for fixing the diaphragm assembly. In some examples, the fixing member may be a mounting box or a mounting frame, on which the diaphragm assembly is placed; in other examples, the fixing member may also be a sticky fixing member such as a fixing foam glue, a sticky film, etc.; in the present disclosure, the fixing member is arranged at the end of the sound outlet channel facing the sound outlet, and is fixedly connected to the end and then installed on the middle frame of the terminal device.

Here, the diaphragm assembly has the functions of sound transmission and air permeability; the external audio or call audio output by the audio module will be transmitted from the diaphragm assembly to the sound outlet.

In the embodiment of the present disclosure, the diaphragm support structure is disposed in the sound outlet channel between the sound outlet and the audio component. The diaphragm support structure can be disposed close to the sound outlet, or close to the audio component, and the present disclosure does not limit this. Optionally, the diaphragm support structure is disposed close to the sound outlet and surrounds the sound outlet. Since the diaphragm component has the functions of sound transmission and air permeability, it can be used as a dust-proof and breathable structure of the audio module, which can not only reduce the structural occupancy and cost of setting a dustproof net in the audio module alone, but also can flexibly adjust the volume of the audio output in different modes.

In the present disclosure, when the diaphragm assembly is stimulated, the diaphragm assembly is deformed to form the first state, for example, the diaphragm assembly is stretched and hardened, and the diaphragm assembly has a greater ability to block audio; thus, when the audio module works in the handset mode, the diaphragm assembly can be stretched to reduce the volume of the call audio output from the sound outlet without affecting the sound quality of the call audio, thereby ensuring the effectiveness of the call; when the audio module works in the speaker mode, the stimulation applied to the diaphragm assembly disappears, the diaphragm assembly naturally shrinks and softens to form the second state, and the diaphragm assembly has a smaller ability to block audio, thereby ensuring the normal volume of the external audio output from the sound outlet, and stabilizing the effect of external audio.

Here, the excitation effect on the diaphragm assembly may be generated by a driving module. Exemplarily, the driving module is respectively connected to the two opposite ends of the diaphragm assembly away from the sound outlet; the driving module generates an excitation effect on the diaphragm assembly when powered on, and pulls the diaphragm assembly toward the driving module to stretch the diaphragm assembly. Here, the driving assembly may be a linear motor, a voice coil motor, or a piezoelectric motor, etc., and the present disclosure does not limit this.

In the present disclosure, the material of the diaphragm assembly may be plastic, plastic, etc., and the present disclosure does not impose any limitation on this.

In some embodiments, the material of the diaphragm assembly is a piezoelectric material.

Here, the diaphragm assembly is a piezoelectric film, and when an electrical excitation signal is applied to the piezoelectric film, the inverse piezoelectric effect of the piezoelectric film is stimulated. The inverse piezoelectric effect is: when an electrical excitation signal is applied in the polarization direction of the dielectric of the piezoelectric film to form an electric field, these dielectrics will produce mechanical deformation or mechanical stress in the specified direction, so that the piezoelectric film will be strained, so that the piezoelectric film changes shape due to the strain. Here, the piezoelectric film gradually hardens when stretched to form a first state, and the acoustic impedance gradually increases, thereby increasing the ability to block audio sound. When the electrical excitation signal is withdrawn, the piezoelectric film recovers its deformation and shrinks and softens to form a second state. At this time, the acoustic impedance of the piezoelectric film is reduced to a low level, so that the ability to block audio sound is gradually weakened, ensuring that the output audio is smoothly output from the sound output channel.

It should be noted that, in the embodiment of the present disclosure, the first state of deformation of the diaphragm assembly may include deformations of different degrees. The stronger the excitation applied to the diaphragm assembly, the greater the deformation degree of the diaphragm assembly, for example, the greater the stretching length, and accordingly, the greater the acoustic impedance of the diaphragm assembly, and thus the stronger the sound blocking ability.

A diaphragm assembly is provided in the audio module proposed in the embodiment of the present disclosure. The diaphragm assembly is provided between the audio assembly and the sound outlet of the terminal device, and has a first deformed state and a second undeformed state; and the diaphragm assembly has different blocking capabilities for audio volume when in different states. In this way, the audio module can change the audio volume output from the sound outlet of the terminal device based on the morphological change of the diaphragm assembly; in this way, when the device to be installed, such as the terminal device, is in a call scene, the diaphragm assembly can reduce the audio volume output from the sound outlet, thereby reducing the leakage of call information; when the terminal device is in an audio external speaker scene, the diaphragm assembly can prompt the sound outlet to output audio with normal volume, thereby stabilizing the audio external speaker effect; and the structural complexity and preparation cost of the diaphragm assembly are low, thereby further improving the practicality of the audio module.

In some embodiments, referring to FIG. 2 , FIG. 2 is a schematic diagram showing the connection between the diaphragm assembly and the conductive sheet according to an exemplary embodiment; as shown in FIG. 2 , the diaphragm support structure 3 further includes:

The conductive component 32 is arranged on the diaphragm component 31;

When the conductive component 32 is in the power-on state, the diaphragm component 31 is in the first state; when the conductive component 32 is in the power-off state, the diaphragm component 31 is in the second state.

Here, the diaphragm assembly may be the piezoelectric film proposed above in the present disclosure.

In the present disclosure, in conjunction with FIG3 , the audio module proposed in the present disclosure further includes a signal transmission member 33 connected to the conductive component 32. The signal transmission member 33 can transmit an electrical excitation signal to the conductive component 32 to energize the conductive component 32.

The conductive component is fixedly connected to the diaphragm component and can stimulate the diaphragm component when powered on; the conductive component may include a metal conductive sheet or a conductive circuit board, etc., which is not limited in the present disclosure.

The signal transmission component connects the conductive component and the electronic control module of the terminal device where the audio module is located; the signal transmission component can receive the electrical excitation signal generated by the electronic control module and transmit the electrical excitation signal to the conductive component. The above-mentioned signal transmission component can be a signal transmission wiring, or a signal transmission circuit board, such as a flexible printed circuit (FPC).

Here, when the electrical excitation signal is transmitted to the conductive component, an electric field is formed in the polarization direction of the dielectric of the piezoelectric film, thereby generating an excitation effect on these dielectrics. These dielectrics then generate mechanical deformation or mechanical stress in the specified direction, causing the piezoelectric film to generate strain. The piezoelectric film changes its shape due to the strain to form the first state, and increases its ability to block audio sound.

In the embodiment of the present disclosure, by providing a conductive component, the complexity of the structure and the preparation cost are reduced compared to the solution of providing a dual voice coil dipole speaker or a combined screen sound. In addition, the rate of applying electrical excitation to the diaphragm component is fast, further improving the audio output adjustment effect of the audio module in different scenarios.

In some embodiments, referring to FIG. 3 , FIG. 3 is a structural schematic diagram 1 of a diaphragm support structure according to an exemplary embodiment; as shown in FIG. 3 ; the conductive component 32 is at least one group;

A group of conductive components 32 includes two conductive sheets 321, which are respectively arranged on the surface of the diaphragm component 31 facing the sound outlet (not shown in the figure) and the surface of the diaphragm component 31 facing the audio component (not shown in the figure).

Here, the two conductive sheets can be respectively connected to the same signal transmission component, and can also be connected to the signal transmission component through one of the conductive sheets on the basis of electrical connection. It should be noted that the two conductive sheets can be electrically connected through an FPC cable provided in the diaphragm support structure. The two conductive sheets can be attached to the surface of the diaphragm assembly, or embedded in the surface of the diaphragm assembly, and the present disclosure does not limit this.

As shown in FIG. 3 , the signal transmission member 33 commonly connected to the two conductive sheets 321 of a group of conductive components 32 may be a signal transmission line.

In the present disclosure, two conductive sheets are aligned in a direction perpendicular to the diaphragm assembly, and are respectively located on the surface of the diaphragm assembly facing the sound outlet and the surface of the diaphragm assembly facing the audio component; in this way, the two conductive sheets can jointly form a more effective electric field when receiving an electrical excitation signal, thereby improving the effectiveness of exciting the diaphragm assembly to produce deformation.

In some embodiments, in conjunction with FIG. 2 and FIG. 3 , the conductive component 32 includes two groups;

The two groups of conductive components 32 are respectively distributed at two opposite ends of the diaphragm component 31 along the arrangement direction a of the diaphragm component 31 .

Here, the arrangement direction of the diaphragm assembly is perpendicular to the extension direction of the sound outlet channel; the two groups of conductive components are respectively arranged at the positions of the two opposite ends of the diaphragm assembly along the arrangement direction. In the present disclosure, the two groups of conductive components are respectively connected to a signal transmission member.

The two groups of conductive components of the embodiment of the present disclosure can receive the electrical excitation signal at the same time to stimulate the diaphragm component, or different groups of conductive components can receive the electrical excitation signal at different times. In some examples, the two groups of conductive components can receive the same-phase electrical excitation signal to enhance the electric field applied to the diaphragm component, or can receive the opposite-phase electrical excitation signal to weaken the electric field applied to the diaphragm component.

In this way, by providing two groups of conductive components, the degree of excitation applied to the diaphragm component can be adjusted in different scenarios, further increasing the flexibility of adjusting the degree of deformation of the diaphragm component.

In some embodiments, referring to FIG. 4 , FIG. 4 is a second structural schematic diagram of a diaphragm support structure according to an exemplary embodiment; in combination with FIG. 3 and FIG. 4 , the diaphragm support structure 3 further includes:

The support layer 34 is disposed between the audio component (not shown in the figure) and the diaphragm component 31, and is connected to and supports the diaphragm component 31;

The support layer 34 has a first opening (not shown in the figure), and the first opening is aligned with the sound outlet (not shown in the figure);

The projection of the diaphragm assembly 31 toward the supporting layer 34 covers the first opening.

Here, the supporting layer is fixedly connected to one end of the sound outlet channel facing the sound outlet, and is assembled on the middle frame of the terminal device together with the partial rear shell forming the above-mentioned end of the sound outlet channel; wherein the supporting layer is fixedly connected to the diaphragm assembly and supports the diaphragm assembly, conductive assembly, etc. in the diaphragm supporting structure, and is used to fix the position of the above-mentioned components in the terminal device.

In some examples, a support layer covers a surface of the diaphragm assembly facing the audio assembly.

In the present disclosure, the diaphragm assembly can be connected on the support layer by means of snap connection, thread connection or adhesive connection.

The material of the support layer may be plastic, inert metal material, etc. Exemplarily, the support layer may be a polyethylene terephthalate (PET) layer formed of a PET material.

In the present disclosure, the support layer is provided with a first opening, the first opening is opposite to the sound outlet, and the projection of the diaphragm assembly toward the support layer covers the first opening; here, the size of the first opening is greater than or equal to the size of the sound outlet, and the size of the diaphragm assembly is greater than the size of the first opening. In this way, the sound and air output by the audio module can pass through the first opening and the above-mentioned diaphragm assembly with air permeability in sequence, and be output outward along the sound outlet.

The embodiment of the present disclosure can fix the position of the diaphragm support structure in the terminal device and support the diaphragm assembly by setting a support layer; and, through the first opening opened in the support layer, the effectiveness of the sound and air permeability of the audio module is ensured.

In some embodiments, as shown in FIG. 3 , the diaphragm support structure 3 further includes:

A first fixing layer 35 is connected between the supporting layer 34 and the diaphragm assembly 31 and fixes the diaphragm assembly 31 to the supporting layer 34;

The first fixing layer 35 has a second opening (not shown in the figure), and the second opening is aligned with the first opening.

In the embodiments of the present disclosure, the diaphragm assembly can be fixed on the support layer through the first fixing layer. In some examples, the support layer can have an accommodation space, the first fixing layer and the diaphragm assembly are both arranged in the accommodation space, and the first fixing layer is fixed between the diaphragm assembly and the bottom of the accommodation space. In other examples, the diaphragm assembly, the first fixing layer and the support layer can be stacked layer by layer.

Here, the first fixing layer may be fixing foam or fixing foam glue.

In the present disclosure, the conductive sheet located on the surface of the diaphragm assembly facing the audio assembly can be attached between the first fixing layer and the diaphragm assembly, or can be embedded in the first fixing layer and fixed to the surface of the diaphragm assembly through the first fixing layer.

Here, the first fixed layer is provided with a second opening, the second opening is opposite to the first opening, and the projection of the diaphragm assembly toward the first fixed layer covers the second opening; here, the size of the second opening is also greater than or equal to the size of the sound outlet, and the size of the diaphragm assembly is greater than the size of the second opening. In this way, the sound and air output by the audio module can pass through the first opening, the second opening and the above-mentioned diaphragm assembly with air permeability in sequence, and be output outward along the sound outlet.

The embodiment of the present disclosure can fix the position of the diaphragm assembly by setting a first fixing layer, thereby ensuring the stability and tightness of the structural installation; and the second opening opened by the first fixing layer can ensure the effectiveness of the sound and air permeability of the audio module.

In some embodiments, in combination with FIG. 3 and FIG. 4 , the diaphragm support structure 3 further includes:

The second fixing layer 36 is disposed between the diaphragm assembly 31 and the sound outlet (not shown in the figure), and fixes the diaphragm assembly 31 to the housing of the device to be installed;

The second fixing layer 36 has a third opening 361 , and the third opening 361 is aligned with the second opening (not shown in the figure).

In the disclosed embodiment, the second fixing layer protects the surface of the diaphragm assembly by being fixedly connected to the diaphragm assembly, and fixes the diaphragm support structure on the housing of the device to be installed. Specifically, the second fixing layer can be fixedly connected to the bottom of the installation groove of the middle frame of the terminal device. Here, the second fixing layer can be a fixing foam or a fixing foam glue.

In the present disclosure, the conductive sheet located on the surface of the diaphragm assembly facing the sound outlet can be attached between the second fixing layer and the diaphragm assembly, or can be embedded in the second fixing layer and fixed to the surface of the diaphragm assembly through the second fixing layer.

Here, the second fixed layer is provided with a third opening, the third opening is opposite to the first opening, and the projection of the diaphragm assembly toward the third fixed layer covers the third opening; here, the size of the third opening is also greater than or equal to the size of the sound outlet, and the size of the diaphragm assembly is greater than the size of the third opening. In this way, the sound and air output by the audio module can pass through the first opening, the second opening, the above-mentioned diaphragm assembly with air permeability, and the third opening in sequence, and be output outward along the sound outlet.

The embodiment of the present disclosure can fix the position of the diaphragm assembly by setting a second fixing layer, thereby ensuring the stability and tightness of the structural installation; and the third opening opened by the second fixing layer can ensure the effectiveness of the sound and air permeability of the audio module.

It should be noted that, in combination with the above-mentioned embodiments of the present disclosure, the diaphragm support structure includes a diaphragm assembly and a fixing member; here, the above-mentioned support layer, the first fixing layer and the second fixing layer constitute the fixing member.

In some embodiments, the first opening, the second opening, and the third opening are the same size.

Here, the first opening, the second opening and the third opening have the same size, and the centers of the first opening, the second opening and the third opening are located on the same straight line as the center of the sound outlet. In this way, the supporting layer, the first fixed layer and the second fixed layer respectively achieve air permeability and sound permeability through the first opening, the second opening and the third opening, ensuring that the diaphragm supporting structure achieves the maximum air permeability and sound permeability effect.

Preferably, the first opening is located at the center of the supporting layer, the second opening is located at the center of the first fixing layer, and the third opening is located at the center of the second fixing layer.

Here, since the diaphragm assembly has a breathable function, the diaphragm supporting structure as a whole is breathable and dust-proof through the third opening, the diaphragm assembly, the second opening and the first opening; therefore, the diaphragm supporting structure can be used as a dustproof net in the audio module, which not only improves the structural utilization rate of the terminal equipment, but also reduces the structural occupancy and structural cost generated by the terminal equipment separately setting up a dustproof net.

In some examples, the shapes of the first opening, the second opening, and the third opening can all be regular or irregular; for example, they can all be circular, rectangular, or rounded rectangular, and the present disclosure does not limit this. As shown in FIG4 , the first opening (not shown in the figure), the second opening (not shown in the figure), and the third opening 361 proposed in the present disclosure are all irregular annular areas formed by a rectangular area and a semicircular area extending outward from two short sides of the rectangular area.

In some embodiments, the surface of the first fixing layer and/or the second fixing layer has adhesiveness.

Here, both sides of the first fixing layer and the second fixing layer are sticky. Exemplarily, both the first fixing layer and the second fixing layer are solid adhesive layers with sticky surfaces.

In the present disclosure, by setting the surface of the first fixing layer and/or the second fixing layer to be sticky, both sides of the diaphragm assembly in the diaphragm support structure can be effectively fixed, thereby improving the stability and tightness of the structural connection.

The present disclosure also provides a terminal device, which includes:

A housing having a sound outlet;

The audio module proposed in the above embodiment of the present disclosure is located in the housing; the audio component of the audio module is arranged opposite to the sound outlet;

Among them, when the terminal device is in a call scenario, the diaphragm component of the audio module is in a first state; when the terminal device is in an audio external speaker scenario, the diaphragm component is in a second state.

Here, the terminal device is an example of a device to be installed for the audio module proposed above in the present disclosure; the terminal device includes but is not limited to a mobile terminal and a portable electronic device, and the mobile terminal includes but is not limited to a mobile phone and a tablet computer; the portable electronic device includes but is not limited to a smart watch, a speaker or a headset, etc.

In the present disclosure, the audio module of the terminal device is used as a handset structure, which is arranged at the top of the terminal device and integrates a handset mode and a speaker mode. The audio module can output call audio in the handset mode and output external audio in the speaker mode. Here, the rear shell and the front shell of the audio module are both installed in the shell of the terminal device.

Here, the terminal device also has an excitation module, which is arranged in the shell, spaced apart from the audio module and the sound outlet, and is used to excite the diaphragm assembly in the diaphragm support structure to deform and form a first state. In the present disclosure, the excitation module can be arranged near the audio module, connecting the diaphragm assembly in the diaphragm support structure of the audio module; for example, the excitation module can be a driving module, and the driving module drives the diaphragm assembly to stretch and deform in a preset direction. The excitation module can also be arranged at a position of the terminal device away from the top audio module, and is used to excite the diaphragm assembly to deform into the first state through an electrical excitation signal.

It should be noted that the excitation module can excite the diaphragm assembly to produce different degrees of deformation in different scenarios, or cancel the excitation effect on the diaphragm assembly. Exemplarily, when it is detected that the terminal device is in a call scenario, the diaphragm assembly in the diaphragm support structure is excited to deform to form a first state, and the acoustic impedance of the diaphragm assembly increases, thereby reducing the audio volume output by the audio module and reducing sound leakage in private calls; when it is detected that the terminal device is in an audio external speaker scenario, the excitation effect on the diaphragm assembly is canceled to restore the diaphragm assembly to the second state, at which time the acoustic impedance is reduced, reducing the obstruction to the audio output and ensuring the effect of the audio external speaker.

In some embodiments, the terminal device further includes:

The electric control module is located in the housing, spaced apart from the audio module, and electrically connected to the conductive components of the audio module;

Wherein, the electric control module supplies power to the conductive component when the terminal device is in the call scenario; and cuts off power to the conductive component when the terminal device is in the audio external speaker scenario.

Here, the excitation module includes the electronic control module. The terminal device is also provided with a mainboard, which is arranged in the housing and spaced apart from the audio module, and the electronic control module is arranged on the mainboard; here, the electronic control module includes a central processing unit (CPU) or a system-on-a-chip (SoC), etc.

The electric control module can detect the audio scene of the current terminal device. Refer to Figure 5, which is a schematic diagram of the working principle of the electric control module according to an exemplary embodiment. As shown in Figure 5, when the electric control module detects that the audio scene is a call scene, it transmits an electric excitation signal to the diaphragm component; when the electric control module detects that the audio scene is an audio external speaker scene, it cancels the electric excitation signal. Here, taking the conductive component of the diaphragm support structure including a conductive sheet and a signal transmission member as a signal transmission line as an example, the electric control module transmits an electric excitation signal to the signal transmission line according to the detection result of the current audio scene, or cancels the electric excitation signal transmitted to the signal transmission line. Here, applying an electric excitation signal can be applying a DC voltage to the conductive sheet so that the conductive sheet forms an electric field, thereby stimulating the piezoelectric film to stretch to form a first state.

In some examples, the audio scene can be detected by detecting the touch action of the user on the terminal device to determine the audio scene; for example, if the user detects the continuous touch action of the user on the volume increase button of the terminal device, it is determined that the current audio scene is an audio external speaker scene; if the user detects the continuous touch action of the user on the volume reduction button of the terminal device, it is determined that the current audio scene is a call scene. For another example, based on the detected switching event of the user on the speaker mode and the earpiece mode on the touch screen, the audio scene state is determined. In other examples, the electronic control module can obtain the foreground process state of the terminal device, and determine whether the audio scene of the terminal device is an audio external speaker scene or a call scene through the state of the process running in the foreground.

In the embodiment of the present disclosure, the electronic control module is electrically connected to the conductive components of the diaphragm support structure, which saves structural costs compared to setting up a drive module or a dual voice coil dipole speaker, and the rate at which the excitation effect is applied to the diaphragm component is faster, further improving the use effect of the audio module in different scenarios.

In some embodiments, the housing includes a middle frame;

The middle frame has a mounting groove, and the bottom of the mounting groove is connected to the sound outlet;

The second fixing layer of the diaphragm supporting structure is fixedly installed between the bottom of the installation groove and the diaphragm assembly;

The supporting layer of the diaphragm supporting structure is assembled in the mounting groove.

Here, referring to Fig. 1, Fig. 1 shows a middle frame 4. The sound outlet 1 and the diaphragm support structure 3 are both mounted on the middle frame.

In the present disclosure, the mounting slot is arranged on the middle frame and is located at the top of the terminal device. The sound outlet is located on the middle frame and is exposed on the surface of the terminal device; and the bottom of the mounting slot is connected to the sound outlet.

It should be noted that part of the rear shell of the audio module and the diaphragm support structure are installed in the installation groove; specifically, the rear shell and the audio components of the audio module surround a sound outlet channel; the diaphragm support structure is fixedly connected to the end of the sound outlet channel facing the sound outlet; the above-mentioned end of the sound outlet channel and the diaphragm component are jointly assembled in the installation groove formed by the middle frame of the terminal device. Among them, both sides of the second fixing layer of the diaphragm support structure are sticky, so that it is adhered between the bottom of the installation groove and the diaphragm component.

Here, the first opening in the supporting layer of the diaphragm supporting structure, the second opening in the first fixed layer and the third opening in the second fixed layer can play a role of sound transmission and air permeability in the sound outlet channel; the diaphragm assembly also has a sound transmission and air permeability function, so that the sound and air output by the audio module can pass through the first opening, the second opening, the above-mentioned air-permeable diaphragm assembly and the third opening in sequence, and be output outward along the sound outlet.

It should be noted that the above-mentioned main board of the present disclosure is also installed on the middle frame, and is arranged at different positions of the terminal device with intervals from the audio module; the electronic control module is arranged on the main board.

The diaphragm support structure in the present disclosure can be arranged in the installation groove of the middle frame to improve the installation stability of the structure.

Referring to Fig. 6, Fig. 6 is a block diagram of a terminal device according to an exemplary embodiment. As shown in Fig. 6, the terminal device 800 may include one or more of the following components: a processing component 802, a memory 804, a power component 806, a multimedia component 808, an audio module 810, an input/output (I/O) interface 812, a sensor component 814, and a communication component 816.

The processing component 802 generally controls the overall operation of the terminal device 800, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the above-mentioned method. In addition, the processing component 802 may include one or more modules to facilitate the interaction between the processing component 802 and other components. For example, the processing component 802 may include a multimedia module to facilitate the interaction between the multimedia component 808 and the processing component 802. Here, the processing component includes the electronic control module proposed above in the present disclosure.

The memory 804 is configured to store various types of data to support operations on the device 800. Examples of such data include instructions for any application or method operating on the terminal device 800, contact data, phone book data, messages, pictures, videos, etc. The memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

The power component 806 provides power to various components of the terminal device 800. The power component 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the terminal device 800.

The multimedia component 808 includes a screen that provides an output interface between the terminal device 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front camera and/or a rear camera. When the device 800 is in an operating mode, such as a shooting mode or a video mode, the front camera and/or the rear camera may receive external multimedia data. Each front camera and the rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio module 810 is configured to output and/or input audio signals. For example, the audio module 810 includes a microphone (MIC), and when the terminal device 800 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 804 or sent via the communication component 816. In some embodiments, the audio module 810 includes an audio component for outputting an audio signal.

I/O interface 812 provides an interface between processing component 802 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: home button, volume button, start button, and lock button.

The sensor assembly 814 includes one or more sensors for providing various aspects of status assessment for the terminal device 800. For example, the sensor assembly 814 can detect the open/closed state of the device 800, the relative positioning of the components, such as the display and keypad of the terminal device 800, and the sensor assembly 814 can also detect the position change of the terminal device 800 or a component of the terminal device 800, the presence or absence of contact between the user and the terminal device 800, the orientation or acceleration/deceleration of the terminal device 800, and the temperature change of the terminal device 800. The sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 814 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 816 is configured to facilitate the communication between the terminal device 800 and other devices in a wired or wireless manner. The terminal device 800 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

In an exemplary embodiment, the terminal device 800 can be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above method.

In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 804 including instructions, which can be executed by a processor 820 of a terminal device 800. For example, the processor can detect an audio scene of the terminal device. The non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

Those skilled in the art will readily come up with other embodiments of the utility model after considering the specification and practicing the utility model disclosed herein. This application is intended to cover any variation, use or adaptation of the utility model, which follows the general principles of the utility model and includes common knowledge or customary technical means in the art that are not disclosed in this disclosure. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the utility model are indicated by the following claims.

It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims (13)

1. An audio module, comprising:

The audio component is used for being arranged opposite to a sound outlet of equipment to be installed of the audio module;

A diaphragm support structure disposed between the sound outlet and the audio component, having a diaphragm assembly including a deformed first state and an undeformed second state;

Wherein the barrier capability of the diaphragm assembly to the audio sound volume in the first state is greater than the barrier capability of the diaphragm assembly to the audio sound volume in the second state.

2. The audio module of claim 1, wherein the membrane support structure further comprises:

A conductive assembly disposed on the diaphragm assembly;

Wherein the diaphragm assembly is in the first state when the conductive assembly is in an energized state; the diaphragm assembly is in the second state when the conductive assembly is in the de-energized state.

3. The audio module of claim 2, wherein the conductive elements are at least one group;

the group of conductive components comprises two conductive sheets, and the two conductive sheets are respectively arranged on the surface of the diaphragm component facing the sound outlet and the surface of the diaphragm component facing the audio component.

4. The audio module of claim 3, wherein the conductive assembly comprises two sets;

the two groups of conductive assemblies are respectively distributed at two opposite ends of the diaphragm assembly along the arrangement direction of the diaphragm assembly.

5. The audio module of any one of claims 1 to 4, wherein the membrane support structure further comprises:

The support layer is arranged between the audio component and the diaphragm component, and is connected with and supports the diaphragm component;

The support layer has a first opening aligned with the sound outlet;

Wherein a projection of the diaphragm assembly toward the support layer covers the first opening.

6. The audio module of claim 5, wherein the membrane support structure further comprises:

The first fixing layer is connected between the supporting layer and the diaphragm assembly and is used for fixing the diaphragm assembly to the supporting layer;

The first securing layer has a second opening aligned with the first opening.

7. The audio module of claim 6, wherein the membrane support structure further comprises:

The second fixing layer is arranged between the diaphragm assembly and the sound outlet, is connected with the diaphragm assembly and is used for fixing the diaphragm assembly to the shell of the equipment to be installed;

Wherein the second securing layer has a third opening aligned with the second opening.

8. The audio module of claim 7, wherein the first opening, the second opening, and the third opening are the same size.

9. The audio module of claim 7, wherein a surface of the first and/or second anchor layer has an adhesive property.

10. The audio module of any one of claims 1 to 4, wherein the material of the diaphragm assembly is a piezoelectric material.

11. A terminal device, comprising:

the shell is provided with a sound outlet;

An audio module as claimed in any one of claims 1 to 10, located within the housing; the audio component of the audio module is arranged opposite to the sound outlet;

When the terminal equipment is in a call scene, the diaphragm assembly of the audio module is in a first state; and when the terminal equipment is in an audio play-out scene, the diaphragm assembly is in a second state.

12. The terminal device according to claim 11, characterized in that the terminal device further comprises:

The electric control module is positioned in the shell, is arranged at intervals with the audio module and is electrically connected with the conductive component of the audio module;

The electronic control module is used for electrifying the conductive component when the terminal equipment is in the conversation scene; and powering off the conductive component when the terminal device is in the audio play-out scene.

13. The terminal device of claim 11, wherein the housing comprises a center;

The middle frame is provided with an installation groove, and the bottom of the installation groove is communicated with the sound outlet;

the second fixing layer of the membrane supporting structure is fixedly connected between the bottom of the mounting groove and the membrane component;

The support layer of the membrane support structure is assembled in the mounting groove.