WO2021208772A1

WO2021208772A1 - Electronic device

Info

Publication number: WO2021208772A1
Application number: PCT/CN2021/085614
Authority: WO
Inventors: 许超; 朱统; 秦仁轩
Original assignee: 华为技术有限公司
Priority date: 2020-04-15
Filing date: 2021-04-06
Publication date: 2021-10-21
Also published as: CN113542472A; CN113542472B

Abstract

The present application relates to the field of electronic devices and relates to an electronic device. The electronic device comprises a first sound generating apparatus and a second sound generating apparatus; and a part of the sound cavity wall of a sound cavity of the second sound generating apparatus is common with a part of the sound cavity wall of a sound cavity of the first sound generating apparatus and/or a part of the channel wall of a sound transmission channel so as to constitute a common wall. The existence of the common wall makes the first sound generating apparatus and the second sound generating apparatus be combined together to form an electroacoustic device assembly, thereby improving the overall loudspeaker effect of the electronic device and also saving the structure space of the electronic device.

Description

An electronic device

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 202010297141.X, and the application name is "an electronic device" on April 15, 2020, the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the technical field of sound production, and in particular to an electronic device.

Background technique

The current market is pursuing higher and higher external effects of mobile terminals (such as mobile phones), and the architectural space of mobile terminals is getting smaller and smaller, and current mobile terminals are generally equipped with a single electro-acoustic device. In addition to the traditional moving coil speaker, a single electroacoustic device can also be realized by using screen sound. However, the single loudspeaker effect of a single electro-acoustic device is not enough to meet the increasing demands of users for higher loudspeaker effects.

Summary of the invention

The embodiments of the present application provide an electronic device, which can improve the external effect of the electronic device and meet the increasing demand of users for higher external effect.

In order to achieve the foregoing objectives, the following technical solutions are adopted in the embodiments of the present application:

In a first aspect, an embodiment of the present application provides an electronic device that includes: a first sounding device and a second sounding device, a part of the sound cavity wall of the sound cavity of the second sounding device and a part of the first sounding device Shared to form a shared wall. Wherein, a part of the first sounding device includes a part of the sound cavity wall of the sound cavity of the first sounding device; or, includes a part of the channel wall of the sound channel; or, includes a part of the sound cavity wall of the sound cavity and the sound channel Part of the channel wall. The common wall constitutes a part of the back cavity wall of the sound cavity of the second sounding device, and may also constitute a part of other cavity walls of the sound cavity of the second sounding device.

According to the embodiment of the present application, the first sounding device and the second sounding device are combined through a common wall to form a new electroacoustic device system. Due to the existence of the common wall, the common wall will vibrate during the vibration and sound generation of the first sounding device. , This part of the vibration will be transmitted to the second sounding device, and the second sounding device will use this part of the vibration of the common wall to make the first sounding device and the second sounding device realize linkage, which not only improves the overall external effect of the electronic equipment, but also It saves the structural space of electronic equipment and meets the increasing demand of users for higher external amplifier effects.

In a possible implementation of the above first aspect, the first sounding device is a point sound source sounding device, and the point sound source sounding device emits sound through a sound hole, which is equivalent to the external part of the point sound source sounding device. The sound is emitted from the sound hole; the second sound device is a surface sound source sound device, the surface sound source sound device produces sound through screen vibration, which is equivalent to that the external sound of the surface sound source sound device diffuses from the screen . It can also be understood that the area where the external sound emission of the surface sound source sound device diffuses is a surface, the area where the external sound emission diffuses of the point sound source sound device is a point, and the external sound emission area of the surface sound source sound device is larger than that of the point sound source. The output area of the sound device; the external sound of the surface sound source sound device is diffused outward in the form of "surface", and the external sound of the point sound source sound device is diffused outward in the form of "points".

According to the embodiment of the present application, the signal source that drives the point sound source sound device to sound and the signal source that drives the surface sound source sound device to sound are the same signal source, and the audio digital signal processor of the electronic device outputs the same signal source. The signal source, the first sounding device and the second sounding device can work at the same time, and the two work can be debugged separately to achieve a better output effect of simultaneous sound from a point sound source and a surface sound source.

In a possible implementation of the above-mentioned first aspect, it further includes a frequency divider, and the same signal source drives the point sound source sound device and the surface sound source sound device to the signal source through the frequency divider. Sound in different frequency bands. The audio digital signal processor of the electronic device can send driving signals to the first sounding device and the second sounding device, and the same signal source output by the audio digital signal processor drives the first sounding device and the second sounding device through a frequency divider. Sound in different frequency bands of the signal source. For example, the first sound device highlights the vibration and sound output in the middle and high frequency bands, and the second sound device highlights the vibration and sound output in the low frequency band, so that the electronic equipment can externally emit sounds in different frequency bands, and the user experience good.

In a possible implementation of the foregoing first aspect, the point sound source sound generating device includes: a speaker or an earpiece, and a first sound cavity for the speaker or the earpiece to emit sound. The loudspeaker and the earpiece have sound holes through which the external sound is diffused. The electronic device can utilize the structure of the existing loudspeaker or earpiece, saving development costs. The speaker or earpiece is driven by the audio digital signal processor to produce sound, that is, the audio digital signal processor sends a driving signal to the speaker or earpiece, and the speaker or earpiece emits sound through the sound hole, thereby realizing "point sound".

In a possible implementation manner of the above-mentioned first aspect, when the point sound source sound generating device is built in the electronic device, the point sound source sound generating device further includes a sound transmission associated with the first sound cavity Channel, the sound transmission channel is used to transmit the sound of the point sound source sound device to the outside of the electronic device. The sound transmission channel can be integrally formed with a sound hole, or a sound hole is provided on other parts of the device (such as the middle frame). The sound hole is associated with the sound channel, regardless of the setting of the sound hole. It can transmit the sound of the point sound source sound device out of the electronic equipment through the sound transmission channel.

In a possible implementation of the foregoing first aspect, the surface sound source sound emitting device includes: a surface sound generator and a second sound cavity for the surface sound generator to emit sound, and the surface sound generator includes a screen and a driver. The vibration component for the screen to emit sound, the vibration component is located in the second sound cavity. The surface sound generator is driven by the audio digital signal processor to produce sound. The audio digital signal processor sends a driving signal to the vibrating component. The vibrating component vibrates to drive the screen to produce sound, thereby realizing "surface sound", which expands the external sound reproduction area , Improve the external effect of electronic equipment.

In a possible implementation of the above-mentioned first aspect, the screen constitutes the front cavity wall of the second sound cavity, the common wall constitutes a part of the rear cavity wall of the second sound cavity, and the common wall does not It is limited to being a part of the back cavity wall of the second sound cavity. The front cavity wall and the rear cavity wall of the electronic device are opposite and spaced apart, and may be opposite and spaced apart along the thickness direction of the electronic device. This saves the architectural space of the electronic device, which is conducive to the architectural design of the complete system design.

In a possible implementation manner of the above-mentioned first aspect, the vibration component includes a piezoelectric ceramic sheet, and the piezoelectric ceramic sheet is connected to the back of the screen. The number of piezoelectric ceramic sheets is not limited, and can be multiple and stacked. Piezoelectric ceramic sheets are driven by the audio digital signal processor to vibrate. Compared with a single piezoelectric ceramic sheet, multiple piezoelectric ceramic sheets receive the driving signal of the audio digital signal processor and generate a larger amplitude of vibration, which is beneficial to Increase the loudness of the sound from the screen. Moreover, piezoelectric materials are used directly as the vibration source to produce vibration and sound, which reduces the internal space occupied by the electronic device. Piezoelectric ceramic sheets are not conductive and will not affect the signal of the mobile phone, that is, it will not affect the performance of the antenna.

In a possible implementation manner of the above-mentioned first aspect, the piezoelectric ceramic sheet and the common wall are connected by a damping member. Then, when the piezoelectric ceramic sheet vibrates to drive the screen to vibrate, the vibration generated by the piezoelectric ceramic sheet will also be transmitted to the common wall. Therefore, the first sounding device can also use the vibration of the second sounding device, and the first sounding The device and the second sounding device realize the vibration linkage, which can improve the external effect of the first sounding device. The specific type of the damping element is not limited, and it can transmit vibration to the common wall during the vibration of the piezoelectric ceramic sheet to realize the vibration linkage, such as soft glue, glue, foam, etc.

In a possible implementation manner of the above-mentioned first aspect, the vibrating component includes: a magnet and a coil that are arranged oppositely, the magnet is connected to the common wall, and the coil is connected to the back of the screen; or, The coil is connected to the common wall, and the magnet is connected to the back of the screen. Among them, the magnet can be a permanent magnet, or an electromagnet receiving a constant current, and the magnet will generate a constant magnetic field with the same size and direction. The coil generates an alternating magnetic field when it receives the driving signal sent by the audio digital signal processor. The size and direction of the magnetic field generated by the coil changes with the change of the drive signal. For example, when the coil receives the drive signal sent by the audio digital signal processor, when the current in the coil is large, the magnetic field intensity generated by the coil is large, and vice versa. In addition, the transmission direction of the current in the coil can control the direction of the magnetic field generated by the coil. Under the interaction of the above-mentioned two magnetic fields, the coil can cut the magnetic induction line and vibrate up and down along the thickness direction of the electronic device, thereby driving the screen to vibrate and produce sound.

In a possible implementation of the above-mentioned first aspect, the magnet is connected to the common wall and is embedded in the common wall. On the one hand, the space requirement for installing the vibration component between the common wall and the screen is reduced, and the assembly difficulty is weakened; on the other hand, the second magnetic device can increase the vibration amplitude of the common wall when vibrating, and enhance the external effect of the first sound generating device.

In a possible implementation of the foregoing first aspect, a part of the magnet is embedded in the common wall, and another part of the magnet is located outside the common wall. That is, the magnet is not completely embedded in the common wall.

In a possible implementation manner of the foregoing first aspect, the magnet is located outside the common wall. That is, the magnet is not embedded in the common wall.

In a possible implementation manner of the above-mentioned first aspect, the magnet extends into a closed area formed by the wire of the coil.

In a possible implementation manner of the above-mentioned first aspect, the magnet and the coil are relatively spaced apart. That is, the magnet is located outside the closed area where the wire of the coil is wound.

In a possible implementation of the above first aspect, it further includes a middle frame, the first sounding device is installed on the middle frame, and a part of the middle frame constitutes the sound cavity wall of the second sounding device. Part. A part of the middle frame may be shared with a part of the first sounding device to form a common wall. Including: a part of the middle frame is shared with a part of the sound cavity wall of the sound cavity of the first sounding device to form a common wall; or a part of the middle frame is shared with a part of the channel wall of the sound transmission channel to form a common wall; or the middle frame A part of is shared with a part of the sound cavity wall of the sound cavity and a part of the channel wall of the sound transmission channel to form a common wall.

In a possible implementation of the foregoing first aspect, an opening is provided on the middle frame, and the common wall corresponds to the opening. A part of the middle frame is shared with a part of the first sounding device to form a common wall, and a part of the first sounding device has no openings, and a hole is opened on the middle frame. The arrangement of the opening, on the one hand, makes the first sounding device and the second sounding device have a common part at the opening to form a common wall; on the other hand, it facilitates the vibration of the common wall to promote the air vibration in the second sound cavity, In this embodiment, the vibration of the channel wall of the sound transmission channel drives the air in the second sound cavity to vibrate; on the other hand, while improving the external effect of the electronic device, it also saves the raw materials of the electronic device; on the other hand, After the opening is provided, the space between the screen and the common wall in the thickness direction is increased, which provides convenient installation space for subsequent assembly of the vibration component in the second sound cavity, and reduces the difficulty of assembling the whole electronic device.

In a possible implementation manner of the above-mentioned first aspect, a part of the middle frame constitutes the common wall, and the sound cavity wall of the sound cavity and/or the channel wall of the sound transmission channel of the first sound emitting device is connected with The corresponding part of the common wall is provided with an opening. A part of the middle frame is shared with a part of the sound cavity wall of the sound cavity of the first sounding device to form a common wall. The sound cavity wall of the sound cavity of the first sounding device is provided with an opening corresponding to the common wall. There is no opening on the frame; or, a part of the middle frame is shared with a part of the channel wall of the sound channel of the first sounding device to form a common wall, and the channel wall of the sound channel of the first sounding device corresponds to the common wall Is partially provided with openings, and there is no opening on the middle frame; or, a part of the middle frame is shared with a part of the sound cavity wall of the sound cavity of the first sounding device and a part of the channel wall of the sound transmission channel to form a common wall. An opening is provided on the part of the sound cavity wall of the sound cavity corresponding to the common wall of a sound generating device, and the part of the channel wall of the sound transmission channel corresponding to the common wall is provided with openings, and there is no opening on the middle frame .

Description of the drawings

FIG. 1 is a first perspective view of an electronic device according to an embodiment of the application;

FIG. 2 is a side view 1 of an electronic device according to an embodiment of the application;

FIG. 3 is a second side view of the electronic device according to the embodiment of the application;

FIG. 4 is a top view of an electronic device according to an embodiment of the application;

FIG. 5 is a second three-dimensional view of the electronic device according to the embodiment of the application;

Figure 6 is an enlarged view of part A in Figure 2;

FIG. 7 is a partial enlarged view 1 of an electronic device according to an embodiment of the application;

FIG. 8 is a partial enlarged view 2 of the electronic device according to the embodiment of the application;

FIG. 9 is a partial enlarged view 3 of the electronic device according to the embodiment of the application;

FIG. 10 is a simulation curve diagram of an external release effect of an electronic device according to an embodiment of the application;

FIG. 11 is a schematic diagram of signal transmission for the electronic device to realize sound generation according to an embodiment of the application; FIG.

FIG. 12 is a third side view of the electronic device according to the embodiment of the application;

Figure 13 is an enlarged view of part B in Figure 12;

14 is a partial enlarged view 4 of the electronic device according to the embodiment of the application;

15 is a partial enlarged view 5 of the electronic device according to the embodiment of the application;

16 is a partial enlarged view 6 of the electronic device according to the embodiment of the application;

FIG. 17 is a partial enlarged view 7 of the electronic device according to the embodiment of the application;

18 is a partial enlarged view 8 of the electronic device according to the embodiment of the application;

FIG. 19 is a partial enlarged view 9 of the electronic device according to the embodiment of the application.

Detailed ways

The technical solution in this application will be described below in conjunction with the accompanying drawings.

The embodiment of the application provides an electronic device 1 as shown in FIG. 1. The electronic device 1 includes, for example, a mobile phone, a tablet computer, a personal digital assistant (PDA), a notebook computer, a wearable device (such as a smart watch), and a vehicle. Computers, portable multimedia players, navigation equipment, desktop computers, TVs and other devices with screen and external playback functions. The embodiments of the present application do not impose special restrictions on the specific form of the above-mentioned electronic device 1. For the convenience of description, the following uses the electronic device 1 as a mobile phone as an example. The following uses specific embodiments to introduce the electronic device 1 of this application.

1 and 2, the electronic device 1 includes a screen 20, a middle frame 10, and a battery cover 30. Along the thickness direction of the electronic device 1 (shown in the Z direction in FIGS. 1 and 2), the screen 20 and the battery cover 30 are respectively Installed on opposite sides of the middle frame 10, the screen 20 can be a flexible screen or a rigid screen, and there is no limitation here. In the embodiment of the present application, a viscous substance (such as foam glue) can be used to attach the middle frame 10 to the screen 20 and the battery cover 30, but the connection method of the middle frame 10 to the screen 20 and the battery cover 30 is not limited to Through the viscous substance, as long as the assembly can be achieved.

Please refer to Figures 1 to 4. In an example of the present application, along the length direction of the electronic device 1 (shown in the X direction in Figures 1, 2 and 4), the middle frame 10 includes a first part 11 and a second part arranged at intervals. The second part 12, the first part 11 and the second part 12 are connected by the third part 13; along the width direction of the electronic device 1 (shown in the Y direction in Figure 1, Figure 3 and Figure 4), the middle frame 10 includes the first part arranged at intervals The fourth part 14 and the fifth part 15, the fourth part 14 and the fifth part 15 respectively extend along the length direction of the electronic device 1, and the first part 11, the fourth part 14, the second part 12 and the fifth part 15 are connected to form The outer peripheral frame, the outer peripheral frame surrounds the third part 13; wherein the length direction, the width direction and the thickness direction of the electronic device 1 are perpendicular to each other. As shown in FIG. 1, the second part 12 of the middle frame 10 is provided with five sound holes 44, but the number of sound holes 44 is not limited to this, for example, one, two, six, etc.

In addition, the first portion 11 and the second portion 12 respectively extend along the width direction of the electronic device 1, and the third portion 13 extends along the length direction of the electronic device 1, and along the thickness direction of the electronic device 1. The part 13 is closer to the screen 20. In some possible implementation manners, the first part 11 is used as the top end of the electronic device 1, and electrical devices such as noise reduction MIC can be arranged on the first part 11; the second part 12 is used as the bottom end of the electronic device 1, on the second part 12 Electrical devices such as a USB charging port and a sound hole 44 described later can be provided. Those skilled in the art can understand that the structure of the middle frame 10 is not limited to this, and other structures can also be adopted according to the architecture design, which does not limit the scope of protection of the present application.

2 to 4, in this embodiment, the peripheral area on the back of the screen 20 is located on the same side of the first part 11, the second part 12, the fourth part 14 and the fifth part 15 of the middle frame 10, respectively. The surface is adhered by an adhesive layer (not shown in the figure), and is opposed to and spaced apart from the third portion 13 of the middle frame 10 in the thickness direction. 1 and 2, the peripheral area of the back of the battery cover 30 is located on the same side as the first part 11, the second part 12, the fourth part 14 and the fifth part 15 of the middle frame 10. The layers (not shown in the figure) are attached to each other, and are arranged opposite to and spaced apart from the third portion 13 of the middle frame 10 along the thickness direction.

Along the thickness direction of the electronic device 1, the first surface and the second surface of the first portion 11 are located on opposite sides of the first portion 11, and the first surface and the second surface of the second portion 12 are located on opposite sides of the second portion 12. The first surface and the second surface of the fourth portion 14 are located on opposite sides of the fourth portion 14, and the first surface and the second surface of the fifth portion 15 are located on opposite sides of the fifth portion 15. When the user uses the electronic device 1, the surface of the screen 20 facing away from the user is the back of the screen 20, and the surface of the battery cover 30 facing away from the user is the back of the battery cover 30.

In addition, the middle frame 10 is also used to support other internal components of the electronic device 1, for example, control circuit boards, camera module flashes, fingerprint modules, etc. and other functional components. The middle frame 10 can also increase the electronic device 1 Stiffness.

Please refer to FIG. 6, the electronic device 1 of the present application further includes two electro-acoustic devices, namely a first sounding device 40 and a second sounding device 50. In the prior art, generally only the first sounding device 40 is provided. The first sound emitting device 40 will be described in detail below. In this embodiment, the first sound emitting device 40 is built in the electronic device 1. The first sound emitting device 40 includes a speaker 43 and a first sound cavity for the speaker 43 to emit sound. 41. A sound channel 42 associated with the first sound cavity 41 and a sound hole 44 associated with the sound channel 42.

In addition, the specific type of the loudspeaker 43 is not limited. It can use the principle of electro-acoustic transducer to vibrate and produce sound. Type (ie reed type), piezoelectric type (ie crystal type), etc.

Referring to FIG. 6, in this embodiment, the first sound generating device 40 is installed on the middle frame 10. Specifically, a part of the sound cavity wall 411 of the first sound cavity 41 and a part of the channel wall 421 of the sound transmission channel 42 are installed on The third part 13 of the middle frame 10 faces the side of the screen 20, and the second part 12 of the middle frame 10 faces the first part 11, and a part of the sound cavity wall of the first sound cavity 41 and the sound transmission channel 42 are also installed. Part of the channel wall.

Those skilled in the art can understand that the installation form of the first sounding device 40 and the middle frame 10 is not limited to this, and other installation forms can also be adopted according to the architectural design. For example, the third part 13 of the middle frame 10 is only installed with the first Part of the sound cavity wall 411 of the sound cavity 41; or, only a part of the channel wall 421 of the sound transmission channel 42 is installed on the third part 13 of the middle frame 10, which does not limit the protection scope of the present application here.

The sounding process of the first sounding device 40 is as follows: the speaker 43 as a sounding unit uses the principle of electro-acoustic transduction to vibrate and sound, and after passing through the sound transmission channel 42 through the sound hole 44, it is transmitted to the outside of the electronic device 1. The sound outlet 44 is diffused, which is equivalent to the point sound source of the first sounding device 40 constituting the electronic device 1. That is, the first sound emitting device 40 serves as the point sound source sounding device of the electronic device 1 and forms the first external emitting source of the electronic device 1.

It should be noted that the specific structure of the first sound emitting device 40 is not limited to this. In some alternative implementations, the speaker 43 can be replaced with other electroacoustic transducers, such as earpieces. Moreover, the first sound emitting device 40 is not limited to being completely built in the electronic device 1. For example, in some embodiments, the first sound emitting device 40 is partially built in the electronic device 1 and partially externally located outside the electronic device 1.

The second sound generating device 50 will be described in detail below. Please continue to refer to FIGS. 2, 5 and 6. In this embodiment, the second sound generating device 50 includes a screen 20, a second sound cavity 51, and a driving screen 20 to emit sound. The vibration component 52 is located in the second sound cavity 51 and connected to the back of the screen 20. 1 to 6, the first part 11 of the middle frame 10 between the screen 20 and the third part 13 is the first sub-part 111, and the second part 12 of the middle frame 10 is located on the screen 20 and the third part 13 The part in between is the second sub-part 121, the fourth part 14 of the middle frame 10 between the screen 20 and the third part 13 is the fourth sub-part 141, and the fifth part 15 of the middle frame 10 is located between the screen 20 and The part between the third part 13 is the fifth sub-part 151, the first sub-part 111, the second sub-part 121, the fourth sub-part 141, the fifth sub-part 151, the third part 13 and the screen 20 are composed of six parts A part of the sound cavity wall of the second sound cavity 51 is formed. Equivalently, the screen 20 constitutes the front cavity wall of the second sound cavity 51, and the third part 13 of the middle frame 10 constitutes a part of the rear cavity wall of the second sound cavity 51. The directions are opposite and set at intervals. Those skilled in the art can understand that the structure of the second sound cavity 51 is not limited to this, and other forms may also be adopted according to the architectural design.

Among them, a part of the sound cavity wall of the second sound cavity 51 of the second sounding device 50 is shared with a part of the first sounding device 40 to form a common wall 4211 (shown in the dashed frame in FIG. 6). In this embodiment, the common wall 4211 constitutes a part of the back cavity wall of the second sound cavity 51. That is, the first sound emitting device 40 and the second sound emitting device 50 are combined to form an electroacoustic device assembly, which saves the architectural space of the electronic device 1 and facilitates the architectural design of the entire system design. Those skilled in the art can understand that the common wall 4211 is not limited to being a part of the rear cavity wall of the second sound cavity 51, and may also be a part of other cavity walls of the second sound cavity 51 according to the architectural design.

It should be noted that the composition of the common wall 4211 between the first sounding device 40 and the second sounding device 50 is not specifically limited, including but not limited to the following situations:

Referring to FIG. 6, in this embodiment, a part of the third part 13 of the middle frame 10 is shared with a part of the channel wall 421 of the sound channel 42 of the first sounding device 40, that is, a part of the channel wall 421 of the sound channel 42 A common wall 4211 is formed (shown in a dashed frame in FIG. 6).

In this embodiment, referring to FIGS. 5 and 6, an opening 53 is also provided on the middle frame 10. Specifically, an opening 53 is provided on the third part 13 of the middle frame 10, and the common wall 4211 and the opening 53 are provided. Correspondingly constitute a part of the sound cavity wall of the second sound cavity 51. That is, the middle frame 10 has a hole in the part corresponding to the common wall 4211. The arrangement of the opening 53, on the one hand, makes the first sounding device 40 and the second sounding device 50 have a common part at the opening 53 to form a common wall 4211; on the other hand, it facilitates the vibration of the common wall 4211 to promote the second sound The air vibration in the cavity 51, in this embodiment, the vibration of the channel wall 421 of the sound transmission channel 42 drives the air vibration in the second sound cavity 51; on the other hand, while improving the external effect of the electronic device 1, it also saves On the other hand, after the opening 53 is provided, the space between the screen 20 and the common wall 4211 in the thickness direction is increased, which facilitates the subsequent assembly of the vibration component 52 in the second sound cavity 51 Ground installation space reduces the difficulty of assembling the electronic device 1 as a whole.

In some possible alternative implementations, please refer to FIG. 7, a part of the third part 13 of the middle frame 10 and a part of the sound cavity wall 411 of the first sound cavity 41 of the first sound emitting device 40 and the passage of the sound transmission channel 42 A part of the wall 421 is shared, and a part of the sound cavity wall 411 of the first sound cavity 41 and a part of the channel wall 421 of the sound transmission channel 42 constitute a common wall 4211 (shown in the dashed frame in FIG. 7). The common wall 4211 corresponds to the opening 53 on the middle frame 10, and the opening on the third part 13 of the middle frame 10 is shown in FIG. 7.

In some possible alternative implementations, the difference from the above-mentioned embodiments is that a part of the third part of the middle frame is shared with a part of the sound cavity wall of the first sound cavity of the first sound emitting device. A part of the sound cavity wall of the first sound cavity constitutes a common wall, and the common wall corresponds to the opening on the middle frame.

In some possible alternative implementations, the difference from the above-mentioned embodiments is that, referring to FIG. 8, a part of the third part 13 of the middle frame 10 is connected to the channel wall 421 of the sound channel 42 of the first sound emitting device 40. A part is shared, and a part of the third part 13 of the middle frame 10 is a shared wall 4211 (shown in a dashed frame in FIG. 8). The third part 13 of the middle frame 10 is not provided with an opening, and the channel wall 421 of the sound transmission channel 42 is provided with an opening 53 at the part corresponding to the common wall 4211.

In some possible alternative implementations, the difference from the above-mentioned embodiment is that, referring to FIG. 9, a part of the third part 13 of the middle frame 10 and the sound cavity wall of the first sound cavity 41 of the first sound emitting device 40 A part of 411 and a part of the channel wall 421 of the sound transmission channel 42 are shared, and a part of the third part 13 of the middle frame 10 is a shared wall 4211 (shown in a dashed frame in FIG. 9). The third part 13 of the middle frame 10 is not provided with openings, and the sound cavity wall 411 of the first sound cavity 41 and the channel wall 421 of the sound transmission channel 42 are provided with openings 53 at the portions corresponding to the common wall 4211 respectively.

In some possible alternative implementations, the difference from the above-mentioned embodiment is that a part of the third part of the middle frame is shared with a part of the sound cavity wall of the first sound cavity of the first sounding device, and the third part of the middle frame Part of the part is a shared wall. The third part of the middle frame is not provided with an opening, and the sound cavity wall of the first sound chamber is provided with an opening at this part corresponding to the common wall.

The sounding process of the second sounding device 50 is as follows: the vibration component 52 vibrates to push the screen 20 to vibrate (the Z direction in FIG. 6 shows the vibration direction of the screen 20), and the screen 20 pushes the air to generate sound during the vibration process, so that the entire screen 20 will sound. . Since the external sound is emitted from the entire screen 20, it is equivalent to the second sound emitting device 50 constituting the surface sound source of the electronic device 1, which enlarges the external reproduction area and can improve the volume and sound quality. That is, the second sound emitting device 50 serves as the surface sound source sound emitting device of the electronic device 1 and forms the second external emitting source of the electronic device 1. Therefore, the point sound source sound device and the surface sound source sound device of the electronic device 1 of the present application can work at the same time, and the combination of the first external amplifier source and the second external amplifier source can bring a better external amplifier effect to the user. That is, the combination of the first sound emitting device 40 and the second sound emitting device 50 solves the architectural problem at the same time on the premise of achieving a better speaker effect.

In addition, due to the existence of the common wall 4211 between the first sounding device 40 and the second sounding device 50, when the first sounding device 40 vibrates and emits sound, the common wall 4211 will vibrate, and the second sound cavity 51 of the second sounding device 50 can Utilizing this vibration, a certain amplitude of vibration of the common wall 4211 will drive the air in the second sound cavity 51 to vibrate, thereby further improving the external release effect of the second sound generating device 50. In turn, the overall external release effect of the electronic device 1 is further improved.

Compared with the separate first sounding device 40 in the electronic device 1, after the first sounding device 40 vibrates, the vibration of the common wall 4211 will be transmitted to the second sounding device 40, and the second sounding device 40 will use the vibration of the common wall 4211 This not only improves the external release effect of the electronic device 1, but also improves the utilization rate of vibration energy. That is, because of the existence of the common wall 4211, the first sound emitting device 40 and the second sound emitting device 50 realize linkage on the external display, which can not only save energy, but also ensure the volume and sound effect. That is, the combination of the first sounding device 40 and the second sounding device 50 achieves the effect of "1+1<2" in the architectural space and the effect of "1+1>2" in the external performance.

Please refer to FIG. 10, which shows the measured external value when the electronic device 1 is provided with the first sounding device 40 and the second sounding device 50 according to an embodiment of the application. The simulation curve of the amplifier effect, the simulation software used is Comsol, and the simulation condition: the simulation result is obtained through the power amplifier output of the electronic device 1 under the rated power of the electronic device 1 (2.83V). It can be seen that, compared with the prior art, the external loudness of the electronic device 1 of the present application is better than that of the prior art at each frequency.

In addition, since the electronic device 1 of the present application integrates the first sound emitting device 40 (point sound source sound device) and the second sound device 50 (surface sound source sound device), the first sound device 40 and the second sound device 50 can be simultaneously Work, the two work can be debugged separately, to achieve a better external amplifier effect that the point sound source and the surface sound source sound at the same time. Specifically, referring to FIG. 11, the electronic device 1 further includes an audio digital signal processor (Audio DSP). The audio digital signal processor can be directly installed on the circuit board of the electronic device 1. The digital signal processor is electrically connected, and the second sound generating device 50 is electrically connected to the audio digital signal processor through the second power amplifier.

The audio digital signal processor sends a driving signal to the first sound emitting device 40 and the second sound device 50 and controls the first sound device 40 and the second sound device 50 to work in different frequency bands, respectively. The signal source that drives the first sounding device 40 to sound and the signal source that drives the second sounding device 50 to sound are the same signal source. The same signal source output by the audio digital signal processor drives the first sounding device 40 and the second sounding device through a frequency divider. The second sound emitting device 50 respectively emits sounds in different frequency bands of the signal source, so that the electronic device 1 can externally emit sounds of different frequency bands, and the user experience is good.

In some embodiments of the present application, the first sounding device 40 emits sound in the middle and high frequency bands, for example, a signal source with a frequency higher than about 250 Hz drives the first sounding device 40 to vibrate and emit sound in the middle and high frequency bands. The second sounding device 50 emits sound in a low frequency band, for example, a signal source with a frequency lower than about 250 Hz drives the second sounding device 50 to vibrate and emit sound in the low frequency band. Therefore, the first sound emitting device 40 and the second sound emitting device 50 can be debugged separately to give the user a different external playback experience.

Please continue to refer to FIG. 11. In some embodiments, the audio digital signal processor of the electronic device 1 also has a sound effect algorithm and a protection algorithm. The sound effect algorithm is used to perform sound effect processing on audio data, and the protection algorithm is used to monitor the sound emitting device. The power plays a role in protecting the electronic device 1. Specifically, the first sounding device 40 is configured with a first detection module, and the first detection module feeds back the power detection result to the first protection algorithm for processing. If the power of the first sounding device 40 is detected to be abnormal, then The power of the first sounding device 40 is adjusted, otherwise no subsequent processing is performed; the second sounding device 50 is equipped with a second detection module, and the second detection module feeds back the power detection result to the second protection algorithm for processing, If it is detected that the power of the second sounding device 50 is abnormal, the power of the second sounding device 50 is adjusted, otherwise, no subsequent processing is performed. After this arrangement, the first sound emitting device 40 and the second sound emitting device 50 can be effectively protected, and the service life of the electronic device 1 can be prolonged.

In order to further improve the external linkage of the electronic device 1, please refer to FIGS. 6-9. In some possible alternative embodiments, the vibrating component 52 is not only connected to the back of the screen 20, but also connected to the common wall 4211. As described in the previous embodiment, due to the existence of the common wall 4211, the second sound cavity 51 can make full use of the vibration of the first sound generating device 40, which improves the external effect of the electronic device 1.

In this embodiment, since the vibration assembly 52 is also connected to the common wall 4211, and the common wall 4211 also serves as a part of the first sounding device 40 (the channel wall 421 of the sound channel 42 of the first sounding device 40 described in the previous embodiment) Part of the first sound cavity 41, or a part of the sound cavity wall 411 of the first sound cavity 41, or a part of the channel wall 421 of the sound transmission channel 42 and a part of the sound cavity wall 411 of the first sound cavity 41). Then, when the vibrating component 52 vibrates to drive the screen 20 to vibrate, the vibration generated by the vibrating component 52 will also be transmitted to the common wall 4211, so that the first sounding device 40 can also use the vibration of the second sounding device 50, In order to enhance the loudspeaker effect of the first sounding device 40.

Therefore, when the audio digital signal processor drives the first sound device 40 and the second sound device 50 to vibrate and produce sound at the same time, the two can mutually use each other's vibration to enhance their own loudness effect; and then, the first sound device 40 and the second sounding device 50 achieve better vibration linkage, achieve better external amplification linkage, and further improve the overall external amplification effect of the electronic device 1.

It should be noted that the vibration component 52 of the present application is an exciter for the screen 20 to emit sound, and the vibration of the screen 20 can be realized through the vibration of the vibration component 52. The vibrating component 52 can be any form of vibrator, and the embodiment of the present application does not make any limitation. The structure and arrangement of the vibrating component 52 will be illustrated below with examples.

Example one

5-9, in this embodiment, the vibrating component 52 includes a piezoelectric ceramic sheet 521, which is connected to the back of the screen 20, and is connected to the common wall 4211 through a damping member 522, FIG. 6 9 shows that a part of the channel wall 421 of the sound transmission channel 42 and the piezoelectric ceramic sheet 521 are connected by a damper 522; but not limited to this, in some alternative embodiments, the piezoelectric ceramic sheet 521 is connected to the common wall The other parts of 4211 are connected by a damping member 522. In addition, the specific type of the damping member 522 is not limited, and it can transmit vibration to the common wall 4211 during the vibration of the piezoelectric ceramic sheet 521 to realize the vibration linkage, such as soft glue, glue dispensing, foam and so on. Among them, the piezoelectric ceramic sheet 521 directly receives the audio signal as a vibration source and vibrates, thereby driving the screen 20 to vibrate to generate sound. In some possible alternatives, the damping member 522 may not be provided, that is, the piezoelectric ceramic sheet 521 is only connected to the screen 20.

In addition, the number of piezoelectric ceramic sheets 521 is not limited, and one piezoelectric ceramic sheet 521 is shown in FIGS. 6 to 9; in other embodiments, there are multiple piezoelectric ceramic sheets 521, and multiple piezoelectric ceramic sheets 521 In a stacked arrangement, compared to a single piezoelectric ceramic sheet 521, the multiple piezoelectric ceramic sheets 521 receive a driving signal and vibrate to generate a larger amplitude, which is beneficial to increase the loudness of the sound emitted by the screen 20. In addition, the piezoelectric material is directly used as the vibration source to produce vibration and sound, which reduces the occupation of the internal space of the electronic device 1. The piezoelectric ceramic sheet 521 has no conductivity and will not affect the signal of the mobile phone, that is, it will not affect the performance of the antenna.

Example two

Please refer to Figures 12 to 19. In this embodiment, the vibrating component 52 includes oppositely arranged magnetic devices. The magnetic devices can be magnets or circuits with magnetic properties. Magnetic devices can be called magnetic devices.

In this embodiment, the magnetic device includes a first magnetic device 523 and a second magnetic device 524 arranged opposite to each other along the thickness direction of the electronic device 1 (shown in the Z direction in FIG. 13), which helps reduce the alignment accuracy of the magnet and the coil. , Weakened the difficulty of assembling the whole electronic device 1. Among them, the first magnetic device 523 is connected to the back of the screen 20, the second magnetic device 524 is connected to the common wall 4211 (shown in the dashed box in FIGS. 13 to 19), and FIGS. 13 to 19 show the second magnetic device 524 and Part of the channel wall 421 of the sound transmission channel 42 is connected; but not limited to this. In some alternative embodiments, the second magnetic device 524 is connected to other parts of the common wall 4211, for example, to the sound cavity wall of the first sound cavity 41 Part of 411 is connected.

In this embodiment, referring to FIGS. 13 and 14, the second magnetic device 524 is completely embedded in the common wall 4211. On the one hand, the space requirement for installing the vibration component 52 between the common wall 4211 and the screen 20 is reduced, and the assembly difficulty is weakened; On the one hand, the second magnetic device 524 can increase the vibration amplitude of the common wall 4211 when vibrating, and enhance the external effect of the first sound generating device 40.

In some possible alternative implementations, please refer to FIGS. 15 to 18, the second magnetic device 524 is connected to the surface of the common wall 4211 facing the screen 20 and is completely located outside the common wall 4211.

In some possible alternative embodiments, please refer to FIG. 19, a part of the second magnetic device 524 is embedded in the common wall 4211, and the remaining part is located outside the common wall 4211.

After arranging the first magnetic device 523 and the second magnetic device 524, by changing the polarity of the first magnetic device 523 or the second magnetic device 524, the first magnetic device 523 and the second magnetic device 524 are attracted to the same sex and the opposite sex is generated. The effect of repelling. For example, keeping the polarity of the first magnetic device 523 unchanged, and continuously changing the polarity of the second magnetic device 524, or keeping the polarity of the second magnetic device 524 unchanged, and continuously changing the polarity of the first magnetic device 523.

Utilizing the principle of same-sex attraction and opposite-sex repulsion between magnetic devices, when the first magnetic device 523 and the second magnetic device 524 have the same polarity, the first magnetic device 523 moves in the direction toward the screen 20 to lift the screen 20 up. When the polarities of the first magnetic device 523 and the second magnetic device 524 are opposite, the first magnetic device 523 moves in the direction toward the common wall 4211 to restore the position of the screen 20. In this way, the first magnetic device 523 is in the electronic The thickness direction of the device 1 continuously reciprocates up and down, thereby driving the screen 20 to move up and down, so as to realize the vibration and sound of the screen 20.

The specific types of magnetic devices are illustrated below by examples, and those skilled in the art can understand that the specific types of magnetic devices are not limited to the following situations.

Please refer to FIG. 15, the first magnetic device 523 is a magnet, and the second magnetic device 524 is a coil. Or, referring to FIG. 16, the first magnetic device 523 is a coil, and the second magnetic device 524 is a magnet. As shown in FIG. 15 and FIG. 16, the magnet is located outside the closed area formed by the wire of the coil, that is, the magnet and the coil are relatively spaced apart.

In this case, take the electronic device shown in Figure 16 as an example. When the coil is energized, the magnetic field generated by the coil can attract the magnetic field generated by the magnet. When the direction of the current in the coil changes, the coil generates The magnetic field generated by the magnet can generate repulsive force with the magnetic field generated by the magnet, thereby producing the effect of attracting the same sex and repulsing the opposite sex, and then drives the screen 20 to move up and down in the thickness direction (shown in the Z direction in Figure 16) to achieve the screen 20 Vibration sounds. It should be noted that the foregoing description is based on the structure shown in FIG. 16 as an example, and the process of implementing vibration and sound on the screen 20 shown in FIG. 15 is the same as that described above, and will not be repeated here.

Referring to FIG. 17, the first magnetic device 523 is a magnet, and the second magnetic device 524 is a coil. Or, referring to FIG. 18, the first magnetic device 523 is a coil, and the second magnetic device 524 is a magnet. The difference from the example illustrated in FIGS. 15 and 16 is that, as shown in FIGS. 17 and 18, the magnet extends into the closed area formed by the wire of the coil.

In this case, taking the electronic device shown in FIG. 18 as an example, when the coil receives the above-mentioned driving signal, an alternating magnetic field is generated. Among them, the size and direction of the magnetic field generated by the coil changes with the change of the drive signal. For example, when the coil receives the above-mentioned driving signal, when the current in the coil is large, the magnetic field intensity generated by the coil is large, and vice versa. In addition, the transmission direction of the current in the coil can control the direction of the magnetic field generated by the coil. The magnet can be a permanent magnet or an electromagnet that receives a constant current. The magnet generates a constant magnetic field with the same size and direction.

Under the interaction of the above-mentioned two magnetic fields, the coil can cut the magnetic induction line and vibrate up and down along the thickness direction of the electronic device (shown in the Z direction in FIG. 18), thereby driving the screen 20 to vibrate and produce sound. It should be noted that the foregoing description is based on the structure shown in FIG. 18 as an example, and the process of implementing sound on the screen 20 shown in FIG. 17 is the same as that described above, and will not be repeated here.

The above description is based on an example in which the electronic device is a mobile phone. The electronic device of the present application has two electro-acoustic devices to form a new electro-acoustic device system. The combination of the two electro-acoustic devices not only improves the overall external effect of the electronic device, but also saves the structural space of the electronic device. The user brings a different external broadcasting experience.

Claims

An electronic device, characterized in that it comprises:

First sounding device;

A second sounding device, a part of the sound cavity wall of the sound cavity of the second sounding device is shared with a part of the sound cavity wall of the sound cavity of the first sounding device and/or a part of the channel wall of the sound transmission channel to form Shared wall.
The electronic device according to claim 1, wherein the first sound emitting device is a point sound source sound device, the point sound source sound device emits sound through a sound hole, and the second sound device is a surface sound source A sound generating device, the surface sound source sound device produces sound through screen vibration, and the signal source that drives the point sound source sound device to sound and the signal source that drives the surface sound source sound device to sound are the same signal source.
The electronic device according to claim 2, further comprising a frequency divider, and the same signal source drives the point sound source sound device and the surface sound source sound device to the signal source through the frequency divider. Sound in different frequency bands.
5. The electronic device according to claim 2, wherein the point sound source sounding device comprises: a speaker or an earpiece, and a first sound cavity for the speaker or the earpiece to emit sound.
The electronic device according to claim 4, wherein when the point sound source sounding device is built in the electronic device, the point sound source sounding device further comprises a sound transmission associated with the first sound cavity Channel, the sound transmission channel is used to transmit the sound of the point sound source sound device to the outside of the electronic device.
The electronic device according to any one of claims 2 to 5, wherein the surface sound source sound generating device comprises: a surface sound generator and a second sound cavity for the surface sound generator to emit sound, and the surface sound source The device includes a screen and a vibrating component that drives the screen to emit sound, and the vibrating component is located in the second sound cavity.
7. The electronic device according to claim 6, wherein the screen constitutes a front cavity wall of the second sound cavity, and the common wall constitutes a part of a rear cavity wall of the second sound cavity.
7. The electronic device according to claim 6, wherein the vibration component comprises a piezoelectric ceramic sheet, and the piezoelectric ceramic sheet is connected to the back of the screen.
8. The electronic device according to claim 8, wherein the piezoelectric ceramic sheet and the common wall are connected by a damping member.
7. The electronic device according to claim 6, wherein the vibrating component comprises: a magnet and a coil arranged oppositely, the magnet is connected to the common wall, and the coil is connected to the back of the screen; or, The coil is connected to the common wall, and the magnet is connected to the back of the screen.
11. The electronic device of claim 10, wherein the magnet is connected to the common wall and is embedded in the common wall.
11. The electronic device of claim 11, wherein a part of the magnet is embedded in the common wall, and another part of the magnet is located outside the common wall.
The electronic device of claim 10, wherein the magnet is located outside the common wall.
9. The electronic device of claim 10, wherein the magnet extends into a closed area formed by the wire of the coil.
11. The electronic device according to claim 10, wherein the magnet and the coil are arranged opposite to each other.
The electronic device according to any one of claims 1 to 5 and 7 to 15, further comprising a middle frame, the first sound emitting device is installed in the middle frame, and a part of the middle frame constitutes the Part of the sound cavity wall of the second sound emitting device.
The electronic device according to claim 16, wherein an opening is provided on the middle frame, and the common wall corresponds to the opening.
The electronic device according to claim 16, wherein a part of the middle frame constitutes the common wall, and the sound cavity wall of the sound cavity of the first sounding device and/or the channel wall of the sound transmission channel are connected with each other. The corresponding part of the common wall is provided with an opening.