CN113542472B

CN113542472B - Electronic device

Info

Publication number: CN113542472B
Application number: CN202010297141.XA
Authority: CN
Inventors: 许超; 朱统; 秦仁轩
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2022-09-16
Anticipated expiration: 2040-04-15
Also published as: CN113542472A; WO2021208772A1

Abstract

The application relates to the field of electronic equipment, and relates to electronic equipment. The electronic device comprises a first sound-emitting arrangement and a second sound-emitting arrangement, a portion of the cavity wall of the sound cavity of the second sound-emitting arrangement being common with a portion of the cavity wall of the sound cavity of the first sound-emitting arrangement and/or a portion of the channel wall of the sound conduction channel to constitute a common wall. The existence of sharing wall makes first sound generating mechanism and second sound generating mechanism combine together to form the electroacoustic device subassembly, when promoting the whole effect of playing outward of electronic equipment, has also saved electronic equipment's framework space.

Description

Electronic equipment

Technical Field

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

Background

The current market pursues higher and higher external playing effect for mobile terminals (such as mobile phones), and the architecture space of the mobile terminals is smaller and smaller, and the current mobile terminals are generally provided with a single electroacoustic device. A single electroacoustic device may be implemented using screen sound production in addition to a conventional moving coil speaker. However, the single play-out effect of a single electroacoustic device is not enough to meet the increasing demand of users for higher play-out effect.

Disclosure of Invention

The embodiment of the application provides an electronic equipment, can promote electronic equipment's external effect of putting, satisfies the user demand of the higher external effect of putting ever-increasing.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect, an embodiment of the present application provides an electronic device, including: a first sound-emitting device and a second sound-emitting device, a portion of a cavity wall of a cavity of the second sound-emitting device being shared with a portion of the first sound-emitting device to constitute a shared wall. Wherein the portion of the first sound emitting device comprises a portion of a sound cavity wall of the sound cavity of the first sound emitting device; or, a portion of a channel wall comprising an acoustic channel; alternatively, a portion of the sound cavity wall comprising the sound cavity and a portion of the channel wall of the sound conduction channel. The common wall forms part of the rear chamber wall of the sound chamber of the second sound-generating device and may also form part of other chamber walls of the sound chamber of the second sound-generating device.

According to the embodiment of the application, first sound generating mechanism and second sound generating mechanism are in the same place through sharing the wall, form new electroacoustic device system, because the existence of sharing the wall, in the first sound generating mechanism vibration sound production process, sharing the wall can vibrate, this part vibration can be transmitted for second sound generating mechanism, this part vibration that second sound generating mechanism can utilize sharing the wall, make first sound generating mechanism and second sound generating mechanism realize the linkage, electronic equipment's whole effect of playing outward has not only been promoted, electronic equipment's framework space has still been practiced thrift, user's ever-growing demand for higher effect of playing outward has been satisfied.

In a possible implementation manner of the first aspect, the first sound generating device is a point sound source sound generating device, the point sound source sound generating device generates sound through a sound outlet hole, and an external sound equivalent to the point sound source sound generating device is diffused from the sound outlet hole; the second sound generating device is a surface sound source sound generating device which generates sound through screen vibration, and equivalently, the external sound reproduction of the surface sound source sound generating device is diffused from the screen. It can also be understood that the region of the surface sound source generating device where the sound is reproduced outward is a surface, the region of the point sound source generating device where the sound is reproduced outward is a point, and the outer playing area of the surface sound source generating device is larger than that of the point sound source generating device; the external sound of the surface sound source sounding device is diffused outwards in a 'surface' form, and the external sound of the point sound source sounding device is diffused outwards in a 'point' form.

According to the embodiment of this application, the drive the signal source and the drive of point sound source sound generating mechanism sound production the signal source of face sound source sound generating mechanism sound production is same signal source, the same signal source of electronic equipment's audio digital signal processor output, and first sound generating mechanism and second sound generating mechanism can simultaneous working, and two way works can debug respectively, reach the better effect of playing outward of point sound source and face sound source sound production simultaneously.

In a possible implementation manner of the first aspect, the system further includes a frequency divider, and the same signal source drives the point sound source generating device and the surface sound source generating device to generate sound respectively in different frequency bands of the signal source through the frequency divider. Can send drive signal to first sound generating mechanism and second sound generating mechanism through electronic equipment's audio digital signal processor, the same signal source of audio digital signal processor output passes through the first sound generating mechanism of frequency divider drive and the sound production of second sound generating mechanism respectively at the different frequency channels of signal source, for example first sound generating mechanism is outstanding in, high band vibration sound production is put outward, second sound generating mechanism is outstanding at low band vibration sound production is put outward to electronic equipment can put the sound of different frequency channels outward, user experience is good.

In one possible implementation manner of the first aspect, the point sound source sound emission device includes: the loudspeaker comprises a loudspeaker or an earphone and a first sound cavity for the loudspeaker or the earphone to sound. The loudspeaker and the receiver are provided with sound outlet holes, and the external sound is diffused through the sound outlet holes. The electronic equipment can utilize the structure of the existing loudspeaker or earphone, so that the development cost is saved. The loudspeaker or the receiver is driven by the audio digital signal processor to sound, namely, the audio digital signal processor sends a driving signal to the loudspeaker or the receiver, and the loudspeaker or the receiver sounds through the sound outlet hole, so that the 'point sound' is realized.

In a possible implementation manner of the first aspect, when the point sound source generating device is placed in the electronic device, the point sound source generating device further includes a sound transmission channel associated with the first sound cavity, and the sound transmission channel is used for transmitting sound generated by the point sound source generating device to the outside of the electronic device. The sound transmission channel can be integrally formed with a sound output hole, or the sound output hole is arranged on other parts (such as a middle frame) on the equipment, the sound output hole is associated with the sound transmission channel, and the sound of the point sound source sounding device can be transmitted out of the electronic equipment through the sound transmission channel no matter how the arrangement form of the sound output hole is.

In one possible implementation manner of the first aspect, the planar sound source sound generation device includes: the surface sounder comprises a screen and a vibration component for driving the screen to sound, and the vibration component is located in the second sound cavity. The surface sound generator is driven by the audio digital signal processor to generate sound, the audio digital signal processor sends a driving signal to the vibration assembly, and the vibration assembly vibrates to drive the screen to generate sound, so that the surface sound generation is realized, the playing area of the external sound is enlarged, and the playing effect of the electronic equipment is improved.

In a possible implementation manner of the first aspect, the screen forms a front cavity wall of the second sound cavity, the common wall forms a part of a rear cavity wall of the second sound cavity, and the common wall is not limited to be a part of the rear cavity wall of the second sound cavity. The front cavity wall and the rear cavity wall of the electronic device are arranged oppositely and at intervals, and can be arranged oppositely and at intervals along the thickness direction of the electronic device. The method saves the framework space of the electronic equipment and is beneficial to the framework design during the design of the whole system.

In a possible implementation manner of the first aspect, the vibration component includes a piezoelectric ceramic plate, and the piezoelectric ceramic plate is connected to the back surface of the screen. The number of the piezoelectric ceramic plates is not limited, and the piezoelectric ceramic plates can be a plurality of piezoelectric ceramic plates which are arranged in a stacked mode. Compared with a single piezoelectric ceramic piece, the piezoelectric ceramic pieces receive the driving signals of the audio digital signal processor, so that the amplitude generated by vibration is large, and the loudness of the sound emitted by the screen is favorably improved. And piezoelectric materials are directly used as vibration sources to vibrate and sound, so that the occupied internal space of the electronic equipment is reduced. The piezoelectric ceramic piece has no conductivity, and cannot influence signals of the mobile phone, namely, cannot influence the performance of the antenna.

In a possible implementation manner of the first aspect, the piezoelectric ceramic plate and the common wall are connected through a damping member. Then, in the process that the piezoelectric ceramic piece vibrates to drive the screen to vibrate, the vibration generated by the piezoelectric ceramic piece is transmitted to the shared wall, so that the first sound generating device can also utilize the vibration of the second sound generating device, the first sound generating device and the second sound generating device realize vibration linkage, and the external playing effect of the first sound generating device can be improved. The specific type of the damping piece is not limited, and the vibration can be transmitted to the common wall in the vibration process of the piezoelectric ceramic piece so as to realize vibration linkage, such as soft glue, glue dispensing, foam and the like.

In one possible implementation manner of the first aspect, the vibration component includes: the magnet and the coil are oppositely arranged, the magnet is connected with the common wall, and the coil is connected with the back of the screen; alternatively, the coil is connected to the common wall, and the magnet is connected to the back surface of the screen. The magnet can be a permanent magnet or an electromagnet receiving constant current, and the magnet can generate a constant magnetic field with invariable size and direction. And the coil generates an alternating magnetic field when receiving a driving signal sent by the audio digital signal processor. The magnitude and direction of the magnetic field generated by the coil changes with the change of the driving signal. For example, in the case where the coil receives a driving signal transmitted from 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 direction of the current flow in the coil may control the direction of the magnetic field generated by the coil. Under the mutual action of the two magnetic fields, the coil can vibrate up and down along the thickness direction of the electronic equipment to cut the magnetic induction line, so that the screen is driven to vibrate and sound.

In one possible implementation of the first aspect, the magnet is connected to the common wall and embedded in the common wall. On one hand, the space requirement for installing the vibration component between the shared wall and the screen is reduced, and the assembly difficulty is weakened; on the other hand, the second magnetic device can improve the vibration amplitude of the common wall during vibration, and the external radiation effect of the first sound generating device is enhanced.

In one possible implementation of the first aspect, a portion of the magnet is embedded within the common wall, and another portion of the magnet is located outside the common wall. I.e. the magnets are not completely embedded in the common wall.

In one possible implementation of the first aspect, the magnet is located outside the common wall. I.e. the magnets are not embedded in the common wall.

In one possible implementation of the first aspect, the magnet extends into a closed region around which the wire of the coil is wound.

In one possible implementation manner of the first aspect, the magnet is disposed opposite to and spaced apart from the coil. I.e. the magnet is located outside the closed area around which the wire of the coil is wound.

In a possible implementation manner of the first aspect, the sound-emitting device further includes a middle frame, the first sound-emitting device is mounted on the middle frame, and a part of the middle frame forms a part of a sound cavity wall of the second sound-emitting device. A portion of the middle frame may be shared with a portion of the first sound emitting device to form a shared wall. The method comprises the following steps: a part of the middle frame is shared with a part of the sound cavity wall of the sound cavity of the first sound-emitting device to form a shared wall; or, a part of the center frame is shared with a part of the channel wall of the acoustic channel to constitute a shared wall; or a part of the middle frame is shared with a part of the cavity wall of the sound cavity and a part of the channel wall of the sound conduction channel to constitute a shared wall.

In a possible implementation manner of the first aspect, the middle frame is provided with an opening, and the common wall corresponds to the opening. A portion of the center frame is shared with a portion of the first sound emitting device to form a shared wall, and a portion of the first sound emitting device is provided with no opening, and an opening is formed in the center frame. The opening is arranged, on one hand, so that the first sound generating device and the second sound generating device have a common part at the opening to form a common wall; on the other hand, the vibration of the common wall is facilitated to push the air in the second sound cavity to vibrate, in this embodiment, the vibration of the channel wall of the sound transmission channel pushes the air in the second sound cavity to vibrate; on the other hand, the external release effect of the electronic equipment is improved, and meanwhile, raw materials of the electronic equipment are saved; on the other hand, after the opening is formed, the space between the screen and the shared wall in the thickness direction is increased, so that a convenient installation space is provided for the subsequent assembly of the vibration component in the second sound cavity, and the difficulty in the whole assembly of the electronic equipment is reduced.

In one possible implementation manner of the first aspect, a part of the middle frame forms the common wall, and the sound cavity wall of the sound cavity of the first sound generating device and/or the channel wall of the sound transmission channel is provided with an opening at a part corresponding to the common wall. A part of the middle frame is shared with a part of the sound cavity wall of the sound cavity of the first sound-emitting device to form a shared wall, the part of the sound cavity wall of the sound cavity of the first sound-emitting device corresponding to the shared wall is provided with an opening, and the middle frame is not provided with the opening; or, a part of the middle frame and a part of the channel wall of the sound transmission channel of the first sound-producing device are shared to form a shared wall, the part of the channel wall of the sound transmission channel of the first sound-producing device corresponding to the shared wall is provided with an opening, and the middle frame is not provided with the opening; or, a part of the middle frame is shared with a part of the sound cavity wall of the sound cavity of the first sound producing device and a part of the channel wall of the sound transmission channel to form a shared wall, the part of the sound cavity wall of the sound cavity of the first sound producing device corresponding to the shared wall is provided with an opening, the part of the channel wall of the sound transmission channel corresponding to the shared wall is provided with an opening, and the middle frame is not provided with an opening.

Drawings

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

FIG. 2 is a first side view of an electronic device according to an embodiment of the present disclosure;

FIG. 3 is a second side view of the electronic device of the present application;

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

fig. 5 is a second perspective view of an electronic device according to an embodiment of the present application;

FIG. 6 is an enlarged view of portion A of FIG. 2;

FIG. 7 is a first enlarged view of a portion of an electronic device according to an embodiment of the disclosure;

FIG. 8 is a second enlarged view of a portion of an electronic device according to an embodiment of the disclosure;

FIG. 9 is a third enlarged view of a portion of an electronic device according to an embodiment of the present application;

FIG. 10 is a simulation graph of the play-out effect of the electronic device according to the embodiment of the present application;

FIG. 11 is a schematic diagram of signal transmission for implementing sound production by an electronic device according to an embodiment of the present application;

FIG. 12 is a third side view of an electronic device in accordance with an embodiment of the present application;

FIG. 13 is an enlarged view of portion B of FIG. 12;

FIG. 14 is a fourth enlarged view of a portion of an electronic device according to an embodiment of the present application;

FIG. 15 is a fifth enlarged view of a portion of an electronic device according to an embodiment of the disclosure;

FIG. 16 is a sixth enlarged view of a portion of an electronic device according to an embodiment of the present application;

fig. 17 is a seventh enlarged view of a part of an electronic apparatus according to an embodiment of the present application;

fig. 18 is an enlarged view eight of a part of an electronic apparatus according to an embodiment of the present application;

fig. 19 is a partially enlarged view nine of an electronic apparatus according to an embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The embodiment of the present application provides an electronic device 1 as shown in fig. 1, where the electronic device 1 includes any device having a screen and a play-out function, such as a mobile phone, a tablet computer, a Personal Digital Assistant (PDA), a notebook computer, a wearable device (e.g., a smart watch), an in-vehicle computer, a portable multimedia player, a navigation device, a desktop computer, and a television. In the embodiment of the present application, the specific form of the electronic device 1 is not particularly limited, and for convenience of description, the electronic device 1 is taken as a mobile phone as an example, and the electronic device 1 of the present application is described below with a specific embodiment.

Referring to fig. 1 and 2, the electronic device 1 includes a screen 20, a middle frame 10 and a battery cover 30, the screen 20 and the battery cover 30 are respectively installed on two opposite sides of the middle frame 10 along a thickness direction (shown in a Z direction in fig. 1 and 2) of the electronic device 1, and the screen 20 may be a flexible screen or a rigid screen, which is not limited herein. In the present embodiment, the middle frame 10 and the screen 20 and the battery cover 30 may be attached together using an adhesive material (e.g., foam), but the manner of attaching the middle frame 10 and the screen 20 and the battery cover 30 is not limited to an adhesive material as long as assembly can be achieved.

Referring to fig. 1 to 4, in an example of the present application, along a length direction (shown in an X direction in fig. 1, 2, and 4) of the electronic device 1, the middle frame 10 includes a first portion 11 and a second portion 12 that are disposed at an interval, and the first portion 11 and the second portion 12 are connected by a third portion 13; along the width direction (shown in the Y direction in fig. 1, 3 and 4) of the electronic device 1, the middle frame 10 includes a fourth portion 14 and a fifth portion 15 that are arranged at intervals, the fourth portion 14 and the fifth portion 15 respectively extend along the length direction of the electronic device 1, the first portion 11, the fourth portion 14, the second portion 12 and the fifth portion 15 are connected to form an outer peripheral frame, and the outer peripheral frame surrounds the third portion 13; 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, five sound emitting holes 44 are provided in the second portion 12 of the middle frame 10, but the number of sound emitting holes 44 is not limited thereto, and is, for example, one, two, six, or the like.

Further, the first portion 11 and the second portion 12 extend in the width direction of the electronic apparatus 1, respectively, and the third portion 13 extends in the length direction of the electronic apparatus 1, and the third portion 13 is closer to the screen 20 than the battery cover 30 in the thickness direction of the electronic apparatus 1. In some possible embodiments, the first portion 11 serves as a top end of the electronic device 1, and electrical components such as a noise reduction MIC may be disposed on the first portion 11; the second portion 12 serves as a bottom end of the electronic device 1, and electric components such as a USB charging interface and a sound output hole 44 described later can be provided in the second portion 12. It will be understood by those skilled in the art that the structure of the middle frame 10 is not limited thereto, and other structures may be adopted according to the architectural design, and the scope of protection of the present application is not limited thereto.

Referring to fig. 2 to 4, in the present embodiment, the peripheral area of the back surface of the screen 20 is respectively attached to the first surface of the first portion 11, the second portion 12, the fourth portion 14, and the fifth portion 15 of the middle frame 10, which are located on the same side, through an adhesive layer (not shown), and is opposite to and spaced from the third portion 13 of the middle frame 10 along the thickness direction. As shown in fig. 1 and 2, the peripheral region of the back surface of the battery cover 30 is attached to the second surface of the first portion 11, the second portion 12, the fourth portion 14, and the fifth portion 15 of the middle frame 10 on the same side, respectively, through an adhesive layer (not shown), and is opposite to and spaced apart from the third portion 13 of the middle frame 10 in the thickness direction.

In 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, 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 surface of the screen 20, and the surface of the battery cover 30 facing away from the user is the back surface of the battery cover 30.

In addition, the middle frame 10 is also used for supporting other internal components of the electronic device 1, such as a control circuit board, a camera module flash, a fingerprint module, and other functional components, and the middle frame 10 can also increase the rigidity of the electronic device 1.

Referring to fig. 6, the electronic device 1 of the present application further includes two electroacoustic devices, namely a first sound generating device 40 and a second sound generating device 50. In the prior art, only the first sound emitting device 40 is generally provided. First, the first sound generating device 40 will be specifically described, in this embodiment, the first sound generating device 40 is built in the electronic apparatus 1, and the first sound generating device 40 includes a speaker 43, a first sound cavity 41 for the speaker 43 to generate sound, a sound transmission channel 42 associated with the first sound cavity 41, and a sound outlet 44 associated with the sound transmission channel 42.

The speaker 43 may be of any type, as long as it can generate sound by vibration based on the principle of electroacoustic transduction, and may be classified into an electrodynamic type (i.e., moving coil type), an electrostatic type (i.e., capacitive type), an electromagnetic type (i.e., tongue type), a piezoelectric type (i.e., crystal type), and the like according to the principle of transduction.

Referring to fig. 6, in the present embodiment, the first sound generating device 40 is mounted on the middle frame 10, specifically, a portion of the cavity wall 411 of the first sound cavity 41 and a portion of the channel wall 421 of the sound transmission channel 42 are mounted on a side of the third portion 13 of the middle frame 10 facing away from the screen 20, and a portion of the cavity wall of the first sound cavity 41 and a portion of the channel wall of the sound transmission channel 42 are also mounted on a side of the second portion 12 of the middle frame 10 facing the first portion 11.

It will be understood by those skilled in the art that the installation form of the first sound generating device 40 and the middle frame 10 is not limited thereto, and other installation forms can be adopted according to the architecture design, for example, only a part of the sound cavity wall 411 of the first sound cavity 41 is installed on the third portion 13 of the middle frame 10; alternatively, the third portion 13 of the middle frame 10 is only provided with a part of the channel wall 421 of the sound transmission channel 42, and this does not limit the scope of the present application.

The first sound generating device 40 generates sound as follows: the speaker 43 is used as a sound generating unit, and vibrates and generates sound by using the principle of electroacoustic transduction, and the sound passes through the sound transmission channel 42 and is transmitted out of the electronic device 1 through the sound output hole 44, and the external sound is diffused from the sound output hole 44, which is equivalent to that the first sound generating device 40 constitutes a point sound source of the electronic device 1. That is, the first sound emitting device 40 forms a first external radiation source of the electronic apparatus 1 as a point sound source sound emitting device of the electronic apparatus 1.

It should be noted that the specific structure of the first sound-generating device 40 is not limited thereto, and in some alternative embodiments, the speaker 43 may be replaced by other electroacoustic transducer devices, such as an earpiece. Also, the first sound-emitting device 40 is not limited to be 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 external to the electronic device 1.

Referring to fig. 2, 5 and 6, in the present embodiment, the second sound generating device 50 includes a screen 20, a second sound cavity 51 and a vibration element 52 for driving the screen 20 to generate sound, and the vibration element 52 is located in the second sound cavity 51 and connected to the back of the screen 20. Referring to fig. 1 to 6, a portion of the first portion 11 of the middle frame 10 located between the screen 20 and the third portion 13 is a first sub-portion 111, a portion of the second portion 12 of the middle frame 10 located between the screen 20 and the third portion 13 is a second sub-portion 121, a portion of the fourth portion 14 of the middle frame 10 located between the screen 20 and the third portion 13 is a fourth sub-portion 141, a portion of the fifth portion 15 of the middle frame 10 located between the screen 20 and the third portion 13 is a fifth sub-portion 151, and the six portions of the first sub-portion 111, the second sub-portion 121, the fourth sub-portion 141, the fifth sub-portion 151, the third portion 13 and the screen 20 constitute a portion of the sound cavity wall of the second sound cavity 51. Equivalently, the screen 20 forms a front wall of the second acoustic chamber 51, and the third portion 13 of the middle frame 10 forms a part of a rear wall of the second acoustic chamber 51, the front wall and the rear wall being disposed opposite and spaced apart in the thickness direction of the electronic device 1. Those skilled in the art will appreciate that the structure of the second cavity 51 is not limited thereto, and other forms may be adopted according to the architecture design.

A part of the cavity wall of the second sound cavity 51 of the second sound generating device 50 is shared with a part of the first sound generating device 40 to form a shared wall 4211 (shown by a dashed line box in fig. 6), and in the present embodiment, the shared wall 4211 forms a part of the rear cavity wall of the second sound cavity 51. That is, the first sound generating device 40 and the second sound generating device 50 are combined together to form an electroacoustic device assembly, so that the architectural space of the electronic device 1 is saved, and the architectural design during the design of the whole system is facilitated. It will be understood by those skilled in the art that the common wall 4211 is not limited to being a part of the rear cavity wall of the second acoustic cavity 51, and may be designed as a part of other cavity walls of the second acoustic cavity 51 according to the architecture.

It should be noted that the composition form of the common wall 4211 between the first sound generating device 40 and the second sound generating device 50 is not particularly limited, and includes but is not limited to the following cases:

referring to fig. 6, in the present embodiment, a portion of the third portion 13 of the middle frame 10 is shared with a portion of the channel wall 421 of the sound transmission channel 42 of the first sound generating device 40, that is, a portion of the channel wall 421 of the sound transmission channel 42 forms a shared wall 4211 (shown by a dashed box in fig. 6).

In this embodiment, referring to fig. 5 and fig. 6, an opening 53 is further formed on the middle frame 10, specifically, the opening 53 is formed on the third portion 13 of the middle frame 10, and the common wall 4211 corresponds to the opening 53 to form a part of the sound cavity wall of the second sound cavity 51. That is, the middle frame 10 is perforated at the portion corresponding to the common wall 4211. The arrangement of the aperture 53 is, on the one hand, such that the first and second

sound emitting devices

40, 50 present a common portion at the aperture 53 to form a common wall 4211; on the other hand, the vibration of the common wall 4211 is facilitated to push the air in the second sound chamber 51 to vibrate, and the vibration of the passage wall 421 of the sound conduction passage 42 in this embodiment pushes the air in the second sound chamber 51 to vibrate; on the other hand, the external release effect of the electronic equipment 1 is improved, and meanwhile, raw materials of the electronic equipment 1 are saved; on the other hand, after the opening 53 is formed, the space between the screen 20 and the common wall 4211 in the thickness direction is increased, so that a convenient installation space is provided for subsequently assembling the vibration component 52 in the second sound cavity 51, and the difficulty in assembling the electronic device 1 is reduced.

In some possible alternative embodiments, referring to fig. 7, a portion of the third portion 13 of the middle frame 10 is shared by a portion of the cavity wall 411 of the first cavity 41 of the first sound generating device 40 and a portion of the channel wall 421 of the sound conduction channel 42, and the portion of the cavity wall 411 of the first cavity 41 and the portion of the channel wall 421 of the sound conduction channel 42 constitute a shared wall 4211 (shown in fig. 7 by a dashed box). The common wall 4211 corresponds to the opening 53 in the middle frame 10, which is shown in fig. 7 as being formed in the third portion 13 of the middle frame 10.

In some possible alternative embodiments, the difference with the above-described embodiments is that a part of the third portion 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 of the first sound-emitting device constituting a shared wall, the shared wall corresponding to the opening in the middle frame.

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

In some possible alternative embodiments, the difference from the above-described embodiment is that, referring to fig. 9, a part of the third portion 13 of the middle frame 10 is shared with a part of the cavity wall 411 of the first sound cavity 41 of the first sound generating device 40 and a part of the channel wall 421 of the sound transmission channel 42, and a part of the third portion 13 of the middle frame 10 is a shared wall 4211 (shown by a dashed box in fig. 9). The third portion 13 of the middle frame 10 is not provided with the opening, and the cavity wall 411 of the first sound cavity 41 and the passage wall 421 of the sound conduction passage 42 are provided with the openings 53 at portions corresponding to the common wall 4211, respectively.

In some possible alternative embodiments, which differ from the above-described embodiments in that a part of the third portion 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 third portion of the middle frame being the shared wall. The third portion of the middle frame is not provided with the opening, and the sound cavity wall of the first sound cavity is provided with the opening at the portion corresponding to the common wall.

The sound production process of the second sound production device 50 is as follows: the vibration unit 52 vibrates to push the screen 20 to vibrate (the direction Z of fig. 6 shows the vibration direction of the screen 20), and the screen 20 pushes air to generate sound during vibration, so that the whole screen 20 can generate sound. Since the external sound is emitted from the whole screen 20, the second sound generating device 50 forms a plane sound source of the electronic device 1, thereby enlarging the external sound area and improving the volume and the sound quality. That is, the second sound emission device 50 serves as a planar sound source sound emission device of the electronic apparatus 1, and forms a second external sound emission source of the electronic apparatus 1. Therefore, the point sound source sounding device and the surface sound source sounding device of the electronic device 1 can work simultaneously, the first external source and the second external source are combined and put externally, and a better external effect is brought to a user. That is, the combination of the first sound generating device 40 and the second sound generating device 50 solves the problem of architecture while achieving better external playing effect.

In addition, due to the existence of the common wall 4211 between the first sound generating device 40 and the second sound generating device 50, when the first sound generating device 40 vibrates to generate sound, the common wall 4211 vibrates, the second sound cavity 51 of the second sound generating device 50 can utilize the vibration, and the vibration of the common wall 4211 with a certain amplitude can drive the air in the second sound cavity 51 to vibrate, so that the external playing effect of the second sound generating device 50 is further improved. Then, the overall external playing effect of the electronic device 1 is further improved.

Compared with the first sound generating device 40 which is arranged in the electronic equipment 1 independently, after the first sound generating device 40 vibrates, the vibration of the common wall 4211 can be transmitted to the second sound generating device 40, and the second sound generating device 40 can utilize the vibration of the common wall 4211, so that the external playing effect of the electronic equipment 1 is improved, and the utilization rate of vibration energy is also improved. That is, the first sound generating device 40 and the second sound generating device 50 are linked to each other by the common wall 4211, so that not only energy can be saved, but also volume and sound effect can be ensured. That is, the combination of the first sound generating device 40 and the second sound generating device 50 achieves the effect of "1 +1 < 2" in the architectural space, and achieves the effect of "1 +1 > 2" in the external radiation performance.

Referring to fig. 10, fig. 10 is a simulation graph of the measured external playing effect when the electronic device 1 of the embodiment of the present application is provided with the first sound generating device 40 and the second sound generating device 50, and when the electronic device 1 is provided with only the first sound generating device 40, the simulation software used is Comsol, the simulation conditions are: and obtaining a simulation result through the power amplifier output of the electronic equipment 1 under the rated power (2.83V) of the electronic equipment 1. It can be seen that the present application, compared to the prior art, has an advantageous level of loudness of the present application electronic device 1 over prior art at each frequency.

In addition, because the electronic device 1 of the present application integrates the first sound generating device 40 (point sound source sound generating device) and the second sound generating device 50 (surface sound source sound generating device), the first sound generating device 40 and the second sound generating device 50 can work simultaneously, and two paths of work can be debugged respectively, so as to achieve a better external playing effect of simultaneous sound generation of the point sound source and the surface sound source. Specifically, referring to fig. 11, the electronic device 1 further includes an Audio digital signal processor (Audio DSP), the Audio digital signal processor may be directly disposed on a circuit board of the electronic device 1, the first sound generating device 40 is electrically connected to the Audio digital signal processor through a first power amplifier, and the second sound generating device 50 is electrically connected to the Audio digital signal processor through a second power amplifier.

The audio digital signal processor transmits a driving signal to the first sound generating device 40 and the second sound generating device 50 and controls the first sound generating device 40 and the second sound generating device 50 to work at different frequency bands respectively. The signal source driving the first sound-generating device 40 to generate sound and the signal source driving the second sound-generating device 50 to generate sound are the same signal source, and the same signal source output by the audio digital signal processor drives the first sound-generating device 40 and the second sound-generating device 50 to generate sound respectively in different frequency bands of the signal source through the frequency divider, so that the electronic device 1 can play sounds in different frequency bands, and user experience is good.

In some embodiments of the present application, the first sound generating device 40 generates sound in the mid and high frequency bands, for example, a signal source having a frequency higher than about 250Hz drives the first sound generating device 40 to project out of the mid and high frequency band vibratory sound generation. The second sound generating device 50 generates sound in a low frequency band, for example, a signal source with a frequency lower than about 250Hz drives the second sound generating device 50 to protrude out of the low frequency band vibration sound generation. Thus, the first sound emitting device 40 and the second sound emitting device 50 can be adjusted separately, giving the user a different play-out experience.

With reference to fig. 11, in some embodiments, the audio digital signal processor of the electronic device 1 further has a sound effect algorithm and a protection algorithm, where the sound effect algorithm is used to perform sound effect processing on the audio data, and the protection algorithm is used to monitor the power of the sound generating device, so as to protect the electronic device 1. Specifically, the first sound-emitting device 40 is configured with a first detection module, the first detection module feeds back a power detection result to the first protection algorithm for processing, if the power of the first sound-emitting device 40 is detected to be abnormal, the power of the first sound-emitting device 40 is adjusted, otherwise, the subsequent processing is not performed; the second sounding device 50 is configured with a second detection module, the second detection module feeds back a power detection result to the second protection algorithm for processing, if the power of the second sounding device 50 is detected to be abnormal, the power of the second sounding device 50 is adjusted, otherwise, the subsequent processing is not performed. With such an arrangement, the first sound generating device 40 and the second sound generating device 50 can be effectively protected, and the service life of the electronic device 1 can be prolonged.

To further improve the out-coupling of the electronic device 1, please refer to fig. 6 to 9, in some possible alternative embodiments, the vibration component 52 is connected not only to the back of the screen 20, but also to the common wall 4211. As described in the foregoing embodiment, due to the existence of the common wall 4211, the second sound cavity 51 can fully utilize the vibration of the first sound generating device 40, and the external playing effect of the electronic apparatus 1 is improved.

In the present embodiment, since the vibration member 52 is also connected to the common wall 4211, the common wall 4211 also serves as a part of the first sound-emitting device 40 (a part of the passage wall 421 of the sound-transmitting passage 42 of the first sound-emitting device 40 described in the foregoing embodiment, or a part of the chamber wall 411 of the first sound chamber 41, or a part of the passage wall 421 of the sound-transmitting passage 42 and a part of the chamber wall 411 of the first sound chamber 41). Then, in the process that the vibration assembly 52 vibrates to drive the screen 20 to vibrate, the vibration generated by the vibration assembly 52 is also transmitted to the common wall 4211, so that the first sound generating device 40 can also utilize the vibration of the second sound generating device 50 to improve the external radiation effect of the first sound generating device 40.

Therefore, in the process that the audio digital signal processor drives the first sound generating device 40 and the second sound generating device 50 to vibrate and generate sound at the same time, the two devices can mutually utilize the opposite vibration to improve the self-releasing effect; then, the first sound generating device 40 and the second sound generating device 50 realize better vibration linkage, realize better external playing linkage, and further improve the overall external playing effect of the electronic device 1.

The vibration unit 52 of the present application is an actuator for generating sound from the screen 20, and the vibration of the screen 20 can be realized by the vibration of the vibration unit 52. The vibration assembly 52 may be any type of vibrator, and the embodiment of the present application is not limited thereto, and the structure and arrangement of the vibration assembly 52 will be described below.

Example 1

Referring to fig. 5 to 9, in the present embodiment, the vibration component 52 includes a piezoelectric ceramic plate 521, the piezoelectric ceramic plate 521 is connected to the back surface of the screen 20 and connected to the common wall 4211 through a damping member 522, and fig. 6 to 9 show that a portion of the channel wall 421 of the sound transmission channel 42 is connected to the piezoelectric ceramic plate 521 through the damping member 522; without limitation, in some alternative embodiments, the piezoceramic wafers 521 and other portions of the common wall 4211 are connected by a damping member 522. In addition, the specific type of the damping member 522 is not limited, and the vibration can be transmitted to the common wall 4211 in the vibration process of the piezoelectric ceramic piece 521 to realize vibration linkage, such as soft glue, glue dispensing, foam and the like. The piezoelectric ceramic plate 521 is used as a vibration source to directly receive the audio signal and vibrate, so as to drive the screen 20 to vibrate to generate sound. In some possible alternatives, the damping member 522 may not be provided, i.e. the piezoceramic sheet 521 is only connected to the screen 20.

In addition, the number of the piezoelectric ceramic pieces 521 is not limited, and one piezoelectric ceramic piece 521 is shown in fig. 6 to 9; in other embodiments, the number of the piezoelectric ceramic pieces 521 is multiple, the piezoelectric ceramic pieces 521 are stacked, and compared with a single piezoelectric ceramic piece 521, the amplitude generated by the vibration generated when the piezoelectric ceramic pieces 521 receive the driving signal is larger, which is beneficial to increasing the loudness of the sound emitted by the screen 20. And piezoelectric materials are directly used as vibration sources to vibrate and sound, so that the occupied internal space of the electronic equipment 1 is reduced. The piezoelectric ceramic plate 521 has no conductivity, and does not affect the signal of the mobile phone, i.e., does not affect the performance of the antenna.

Example two

Referring to fig. 12 to 19, in the present embodiment, the vibration component 52 includes magnetic devices disposed oppositely, the magnetic devices may be magnets or circuits with magnetism, and all the devices capable of generating magnetic fields or having magnetism may be referred to as magnetic devices without limitation.

In this embodiment, the magnetic device includes a first magnetic device 523 and a second magnetic device 524 that are oppositely disposed along a thickness direction (shown in a Z direction in fig. 13) of the electronic device 1, which is beneficial to reducing the alignment precision of the magnet and the coil, and weakening the difficulty in assembling the electronic device 1 as a whole. Wherein the first magnetic device 523 is connected to the back surface of the screen 20, the second magnetic device 524 is connected to the common wall 4211 (indicated by a dashed box in fig. 13 to 19), and fig. 13 to 19 show that the second magnetic device 524 is connected to a portion of the channel wall 421 of the sound transmission channel 42; without limitation, in some alternative embodiments, second magnetic means 524 is connected to other portions of common wall 4211, such as to a portion of cavity wall 411 of first cavity 41.

In this embodiment, referring to fig. 13 and 14, the second magnetic device 524 is completely embedded in the common wall 4211, so that on 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 other hand, the second magnetic device 524 can increase the vibration amplitude of the common wall 4211 when vibrating, and enhance the external radiation effect of the first sound-emitting device 40.

In some possible alternative embodiments, referring to fig. 15-18, the second magnetic device 524 is connected to the surface of the common wall 4211 facing the screen 20 and is located completely outside the common wall 4211.

In some possible alternative embodiments, referring to fig. 19, the second magnetic device 524 is partially embedded in the common wall 4211, and the rest is located outside the common wall 4211.

After the first magnetic device 523 and the second magnetic device 524 are arranged, the first magnetic device 523 and the second magnetic device 524 generate the effect of attracting each other in the same polarity and repelling each other in the opposite polarity by changing the polarity of the first magnetic device 523 or the second magnetic device 524. For example, the polarity of the first magnetic device 523 is kept constant, and the polarity of the second magnetic device 524 is continuously changed, or the polarity of the first magnetic device 523 is continuously changed, while the polarity of the second magnetic device 524 is kept constant.

By utilizing the principle that like poles attract and opposite poles repel among the magnetic devices, the first magnetic device 523 moves in the direction towards the screen 20 to jack up the screen 20 when the polarities of the first magnetic device 523 and the second magnetic device 524 are the same, and the first magnetic device 523 moves in the direction towards the common wall 4211 to restore the position of the screen 20 when the polarities of the first magnetic device 523 and the second magnetic device 524 are opposite, so that the first magnetic device 523 continuously reciprocates up and down in the thickness direction of the electronic device 1 to drive the screen 20 to move up and down, and the screen 20 is vibrated to generate sound.

Specific types of magnetic devices are illustrated below, and those skilled in the art will appreciate that the specific types of magnetic devices are not limited to the following cases.

Referring to fig. 15, the first magnetic device 523 is a magnet, and the second magnetic device 524 is a coil. Alternatively, 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 16, the magnet is located outside the enclosed region around which the wire of the coil is wound, i.e., the magnet is spaced opposite the coil.

In this case, taking the electronic device shown in fig. 16 as an example, after the coil is powered on, the magnetic field generated by the coil and the magnetic field generated by the magnet generate attractive force, and after the direction of the current introduced into the coil is changed, the magnetic field generated by the coil and the magnetic field generated by the magnet generate repulsive force, so as to generate the effect of like-pole attraction and opposite-pole repulsion, and then drive the screen 20 to move up and down in the thickness direction (shown in the Z direction in fig. 16), so as to realize the vibration sound production of the screen 20. It should be noted that the above is explained by taking the structure shown in fig. 16 as an example, and the process of realizing the vibration sound production of the screen 20 shown in fig. 15 is the same as the above, and is not repeated here.

Referring to fig. 17, the first magnetic device 523 is a magnet, and the second magnetic device 524 is a coil. Alternatively, 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 set forth above in fig. 15 and 16 is that the magnet extends into the enclosed region where the wire of the coil is wound, as shown in fig. 17 and 18.

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. Wherein the magnitude and direction of the magnetic field generated by the coil are changed along with the change of the driving signal. For example, when the coil receives the above-described drive signal, the coil generates a larger magnetic field strength when the current in the coil is larger, and conversely, the magnetic field strength is smaller. In addition, the direction of the current flow in the coil may control the direction of the magnetic field generated by the coil. The magnet may be a permanent magnet or an electromagnet receiving a constant current, which produces a constant magnetic field of constant magnitude and direction.

Under the interaction of the two magnetic fields, the coil can vibrate up and down along the thickness direction (shown in the Z direction in fig. 18) of the electronic device, so that the screen 20 is driven to vibrate and sound. It should be noted that the above is described by taking the structure shown in fig. 18 as an example, and the process of implementing the sound generation of the screen 20 shown in fig. 17 is the same as the above, and is not described again here.

The above is an example description in which the electronic device is a mobile phone. The electronic equipment has the advantages that the two electroacoustic devices form a new electroacoustic device system, the two electroacoustic devices are combined together, the overall external playing effect of the electronic equipment is improved, the framework space of the electronic equipment is saved, and different external playing experience is brought to users.

Claims

1. An electronic device, comprising:

a first sound-emitting device;

a second sound-emitting device, a portion of the cavity wall of the sound cavity of the second sound-emitting device being common with a portion of the cavity wall of the sound cavity of the first sound-emitting device and/or a portion of the channel wall of the sound transmission channel to constitute a common wall; wherein the content of the first and second substances,

the common wall separates the sound cavity of the second sound generating device from the sound cavity and/or sound conducting channel of the first sound generating device;

the first sound generating device is a point sound source sound generating device, the point sound source sound generating device generates sound through a sound outlet hole, the second sound generating device is a surface sound source sound generating device, the surface sound source sound generating device generates sound through screen vibration and drives a signal source and a driving source of the point sound source sound generating device, and the signal source of the surface sound source sound generating device generates sound is the same signal source.

2. The electronic device of claim 1, further comprising a frequency divider, wherein the same signal source drives the point sound source generating device and the area sound source generating device to generate sound respectively in different frequency bands of the signal source through the frequency divider.

3. The electronic device according to claim 1, wherein the point sound source sound emission device includes: the loudspeaker comprises a loudspeaker or an earphone and a first sound cavity for the loudspeaker or the earphone to sound.

4. The electronic device according to claim 3, wherein when the point sound source generating device is built in the electronic device, the point sound source generating device further comprises a sound transmission channel associated with the first sound cavity, the sound transmission channel being configured to transmit sound generated by the point sound source generating device out of the electronic device.

5. The electronic device according to any one of claims 1 to 4, wherein the planar sound source sound emission device includes: the surface sounder comprises a screen and a vibration component for driving the screen to sound, and the vibration component is located in the second sound cavity.

6. An electronic device as claimed in claim 5, characterized in that the screen forms a front cavity wall of the second acoustic cavity and the common wall forms part of a rear cavity wall of the second acoustic cavity.

7. The electronic device of claim 5, wherein the vibrating component comprises a piezoceramic wafer coupled to the back side of the screen.

8. The electronic device of claim 7, wherein the piezoceramic wafer and the common wall are connected by a damping member.

9. The electronic device of claim 5, wherein the vibration component comprises: the magnet and the coil are oppositely arranged, the magnet is connected with the common wall, and the coil is connected with the back of the screen; alternatively, the coil is connected to the common wall, and the magnet is connected to the back surface of the screen.

10. The electronic device of claim 9, wherein the magnet is coupled to and embedded within the common wall.

11. The electronic device of claim 10, wherein a portion of the magnet is embedded within the common wall and another portion of the magnet is located outside the common wall.

12. The electronic device of claim 9, wherein the magnet is located outside the common wall.

13. The electronic device of claim 9, wherein the magnet extends into a closed region around which a wire of the coil is wound.

14. The electronic device of claim 9, wherein the magnet is spaced opposite the coil.

15. The electronic device according to any one of claims 1 to 4 and 6 to 14, further comprising a middle frame, wherein the first sound-emitting device is mounted to the middle frame, and a part of the middle frame constitutes a part of a sound cavity wall of the second sound-emitting device.

16. The electronic device of claim 15, wherein the middle frame is provided with an opening, and the common wall corresponds to the opening.

17. The electronic apparatus according to claim 15, wherein a part of the middle frame constitutes the common wall, and the cavity wall of the sound cavity of the first sound-emitting device and/or a part of the channel wall of the sound transmission channel corresponding to the common wall is provided with an opening.