CN113923288B

CN113923288B - Electronic equipment

Info

Publication number: CN113923288B
Application number: CN202111154593.3A
Authority: CN
Inventors: 吴志华; 李婷婷
Original assignee: Huizhou TCL Mobile Communication Co Ltd
Current assignee: Huizhou TCL Mobile Communication Co Ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2024-03-19
Anticipated expiration: 2041-09-29
Also published as: CN113923288A

Abstract

The embodiment of the application provides electronic equipment, which comprises: the surface of the body is provided with a sound outlet and a functional opening; the sound outlet and the functional opening are positioned at the two non-adjacent ends of the body; the loudspeaker module comprises a vibrating diaphragm; the vibrating diaphragm divides the inner space of the body into an independent open sound resonant cavity and a sound guide channel, the opening of the sound guide channel is a sound outlet, and the opening of the open sound resonant cavity is a functional opening. According to the design scheme of the rear cavity of the open loudspeaker, a special closed sound cavity is not required for the loudspeaker, only the layout space of the loudspeaker body is occupied, and the open sound cavity design scheme is adopted, so that compared with the traditional loudspeaker, a closed shell is required to be additionally designed, the loudspeaker is arranged inside to form a module, the occupied space of the loudspeaker is greatly reduced, meanwhile, the resonance characteristic of the cavity is formed by utilizing the internal structural space and the function opening of the electronic equipment body, and the low-frequency expressive force of a loudspeaker system is enhanced.

Description

Electronic equipment

Technical Field

The application relates to the field of mobile terminals, in particular to an electronic device.

Background

The loudspeaker is an indispensable component on the mobile phone. The loudspeaker emits sound, and relies on the fact that when the vibrating diaphragm vibrates, air is pushed to vibrate, so that sound wave signals are generated. In order to avoid sound short circuit, the conventional design in industry adopts a closed sound cavity to separate the sound of the front and back opposite phases of the loudspeaker, and the design mode needs to occupy a larger space volume (about four times the structural size of the loudspeaker), and is limited by the volume of the sound cavity, and the low-frequency resonance frequency of the sound is generally 800-950Hz, so that the whole sound system has great attenuation in a low-frequency area and cannot reproduce the low-frequency sound component of the sound well, and meanwhile, the low-frequency sound performance of the loudspeaker system is poor due to the limitation of the closed sound cavity.

Content of the application

The embodiment of the application provides mobile equipment to solve the technical problems that the occupied space is large and the low-frequency sound performance is poor when a current loudspeaker adopts a closed sound cavity.

The application provides an electronic device, comprising: the surface of the body is provided with a sound outlet and a functional opening; the sound outlet and the functional opening are positioned at the two non-adjacent ends of the body;

the loudspeaker module comprises a vibrating diaphragm;

the vibrating diaphragm divides the inner space of the body into an independent open sound resonance cavity and a sound guide channel, the opening of the sound guide channel is the sound outlet, and the opening of the open sound resonance cavity is the functional opening.

In one embodiment, the interior space of the body is a closed space.

In one embodiment, the body further comprises a rear housing, the rear housing being integrally formed.

In one specific embodiment, the body further comprises a middle frame, and the middle frame is integrally formed.

In a specific embodiment, the sound outlet is arranged at the bottom of the body, and the functional opening is arranged at the top of the body;

or, the sound outlet is arranged on the left side of the body, and the functional opening is arranged on the right side of the body.

In a specific embodiment, the functional opening is located at a distance k times the length of the body diagonal from the sound outlet, and k is greater than or equal to 0.5.

In a specific embodiment, the length of the sound guiding channel is s times the width of the body, and s is greater than 0.1.

In a specific embodiment, each of the functional aperture areas is m times the body area, m being less than 0.025.

In a specific embodiment, the electronic device further comprises a display screen, and the display screen and the middle frame are adhered through a dispensing process.

In a specific embodiment, the volume of the interior space is n times the volume of the body, n being greater than 0.1.

The embodiment of the application provides electronic equipment, which comprises: the surface of the body is provided with a sound outlet and a functional opening; the sound outlet and the functional opening are positioned at the two non-adjacent ends of the body; the loudspeaker module comprises a vibrating diaphragm; the vibrating diaphragm divides the inner space of the body into an independent open sound resonance cavity and a sound guide channel, the opening of the sound guide channel is the sound outlet, and the opening of the open sound resonance cavity is the functional opening. According to the design scheme of the rear cavity of the open loudspeaker, a special closed sound cavity is not required for the loudspeaker, only the layout space of the loudspeaker body is occupied, and the open sound cavity design scheme is adopted, so that compared with the traditional loudspeaker, a closed shell is required to be additionally designed, the loudspeaker is arranged inside to form a module, the occupied space of the loudspeaker is greatly reduced, meanwhile, the resonance characteristic of the cavity is formed by utilizing the internal structural space and the function opening of the electronic equipment body, and the low-frequency expressive force of a loudspeaker system is enhanced.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Wherein:

FIG. 1 is a front view of an electronic device in one embodiment;

FIG. 2 is a side view of an electronic device in one embodiment;

FIG. 3 is a schematic diagram illustrating a vibration of a diaphragm of a speaker module to generate an acoustic signal according to an embodiment;

FIG. 4 is a schematic diagram illustrating a vibration of a diaphragm of a speaker module to generate an acoustic signal according to another embodiment;

fig. 5 is a schematic diagram of an internal structure of an electronic device in one embodiment.

Reference numerals

A body 11; a speaker module 12; a diaphragm 121; sound outlet 111; functional openings 112.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

The electronic device provided in the embodiments of the present application is described in detail below with reference to fig. 1 to 5 through a specific embodiment and an application scenario thereof, that is, the electronic device is a mobile phone.

As shown in fig. 1 and fig. 2, an embodiment of the present application provides an electronic device, including a body 11, where a sound hole and a functional opening are provided on a surface of the body 11; the sound outlet and the functional opening are positioned at two non-adjacent ends of the body 11;

a speaker module 12 including a diaphragm 121;

the diaphragm 121 divides the internal space of the body 11 into an independent open sound resonance cavity and a sound guide channel, the opening of the sound guide channel is the sound outlet 111, and the opening of the open sound resonance cavity is the functional opening 112.

The body 11 provided in the embodiment of the present application is a basic installation component of an electronic device, and may provide an installation base for the speaker module 12. The speaker module 12 is a sounding member of the electronic device, and the speaker module 12 can make the electronic device release sound, such as playing music, playing video, etc. The diaphragm 121 divides the internal space of the body 11 into an independent open sound resonant cavity and a sound guide channel, and the opening of the open sound resonant cavity is the functional opening 112, so that excessive reflection and attenuation of the sound wave signal are reduced, which is beneficial to improving the sound effect of the speaker. The opening of the sound guiding channel is the sound outlet 111, so that the sound can be normally released, and the sound volume is improved. The surface of the body 11 is provided with a sound outlet 111 and a functional opening 112, the sound outlet 111 and the functional opening 112 are positioned at two non-adjacent ends of the body 11, the sound outlet 111 is a hole site for the sound outlet of the speaker module 12, and the functional opening 112 refers to a hole site of an electronic device for realizing each functional module, such as a headset hole site, a USB hole site, a signal input hole site, and the like. By providing the functional opening 112 on the body 11, the resonance effect can be utilized to enhance the low frequency performance of the speaker module 12. And the sound outlet 111 and the function opening 112 are located at two non-adjacent ends of the body 11, so that the distance between the function opening 112 and the sound outlet 111 is as far as possible, and the internal open space is increased, for example, the function opening 112 is located at the top of the body 11 or the sound outlet 111 is located at the left side of the body 11, the function opening 112 is located at the right side of the body 11, so that the internal open space of the electronic device is equivalent to a resonant cavity, and due to the frequency of resonance, the diaphragm 121 of the speaker module 12 and the surrounding space thereof are determined, the larger the space is, the smaller the resistance applied to the diaphragm 121 of the speaker module 12 in the vibration process is, the lower the resonance frequency is, and the better the low-frequency performance is. And because the loudspeaker module is assembled inside without specially designing the sealed shell module, the volume occupied by the loudspeaker module 12 is reduced, the design requirement of increasingly more and more functional modules of the electronic equipment for increasingly more and more compact space sizes is met, and the realization of the light and thin design of the electronic equipment is facilitated.

Based on the above arrangement, the volume occupied by the speaker module 12 in the electronic device is reduced, the design requirement that more and more functional modules of the electronic device need more and more compact space size is met, and meanwhile, the resonance characteristic of the cavity is formed by utilizing the internal structural space and the functional holes of the electronic device body, so that the low-frequency expressive force of the speaker system is enhanced.

In some embodiments, the interior space of the body 11 is a closed space.

In the above embodiment, the internal space of the body 11 is a closed space, so that no additional closed cavity is needed, and the occupied structural space is the structural size of the speaker itself. No extra structural space is required to be occupied for the closed acoustic cavity. Continuing to take the mobile phone as an electronic device as an example, the size specification of a speaker of a commonly used mobile phone is 1115 speakers, the structural sizes of which are 11x15x2.5 (mm) and 1217 speakers, and the structural sizes of which are 12x17x2.35 (mm). The cavity is adopted to seal the loudspeaker module, so that the cancellation of acoustic signals is avoided, for 1115 loudspeakers, the space size 16x21x4.5 (mm) is required according to simulation evaluation, the size specification is close to 4 times that of the loudspeakers, and for 1217 loudspeakers, the space size 18x23x4.3 (mm) is required, and the size specification is close to 4 times that of the loudspeakers. Compared with the existing design, the compact environment inside the mobile phone is quite high in cost, the occupied volume of the loudspeaker module is greatly reduced, the sound wave signals emitted by the loudspeaker module 12 are transmitted outwards from the sound outlet through the sound guide channel by fully utilizing the electronic equipment, and the problem that the attenuation of the sound signals is reduced due to sound short circuit is solved in the internal open space of the electronic equipment.

In some embodiments, the body 11 further comprises a rear housing, which is integrally formed.

In the above embodiment, the mobile phone is taken as an example, and the mobile phone screen is required to be waterproof and antistatic in the current design, so that the front sealing performance of the mobile phone is good, and the rear shell of the mobile phone is integrally formed, for example, a whole circle of complete foam rubber is attached to the middle frame of the mobile phone, so that the back sealing performance is good. As shown in fig. 3, a schematic diagram of generating an acoustic signal by vibrating the diaphragm 121 of the speaker module 12 is shown, and when a current signal passes through the voice coil of the speaker module 12, the voice coil is vibrated up and down by the ampere force of the magnetic steel magnetic field, so as to drive the diaphragm 121 of the speaker module 12 to vibrate up and down. The diaphragm 121 vibrates upwards, compressing the air above the diaphragm, and the air below the diaphragm is stretched and diluted at this time; the diaphragm 121 vibrates downwards, stretching the air above the diluting diaphragm, where the air below the diaphragm is compressed. The acoustic wave signal is thus generated and propagated in the form of a longitudinal wave. From the physical process of acoustic signal generation, it can be seen that: the acoustic signal is a vector. Acoustic signals are simultaneously present above and below the diaphragm 121 and are in opposite relationship to each other. The diaphragm 121 vibrates upwards, compresses air above the diaphragm to generate positive sound waves, and at the moment, the air below the diaphragm is stretched and diluted to generate negative sound waves; the diaphragm vibrates downwards, and the air above the diluting diaphragm is stretched to generate opposite-phase sound waves, and at the moment, the air below the diaphragm is compressed to generate positive-phase sound waves. If the acoustic signals above and below the diaphragm are superimposed, they will cancel each other out, making the attenuation of the sound less. At this time, although the speaker module 12 is still continuously operated by the power signal, the diaphragm 121 is continuously vibrating up and down, but no effective sound wave signal is generated, which is called a sound short circuit, and the power is not effectively converted into sound waves. Therefore, in the application of the speaker module 12, it is necessary to prevent the acoustic wave signals above (front cavity) and below (rear cavity) the diaphragm from overlapping each other. Compared with the prior art that the loudspeaker module 12 is sealed in a small cavity, the sound wave signal above the diaphragm 121 of the loudspeaker module 12 propagates outwards, the signal below the diaphragm 121 is sealed in the cavity, as shown in fig. 4, the vibration of the diaphragm 121 of the loudspeaker module 12 of the electronic device in this embodiment generates the sound wave signal, and the opposite-phase sound wave signal oscillates and attenuates in the sealed cavity, so that the problem of sound short circuit caused by superposition with the positive-phase sound wave signal is avoided.

In some embodiments, the body 11 further comprises a middle frame, which is integrally formed.

On the basis of the above embodiment, the four middle frames of the electronic device are integrally formed, and besides the function openings 112, such as the USB holes, the earphone holes, the signal input holes, and the like, there is no poor sealing place, that is, the inner spaces of other bodies have good sealing performance, so that the problem that the attenuation of sound signals is reduced is avoided.

In some embodiments, the sound outlet 111 is disposed at the bottom of the body 11, and the functional opening 112 is disposed at the top of the body 11; alternatively, the sound outlet 111 is provided on the left side of the body 11, and the functional opening 112 is provided on the right side of the body 11.

In the above embodiment, the sound outlet 111 is located away from each functional opening 112, for example, the sound outlet 111 is located at the bottom of the body 11, and the functional openings 112 are located at the top of the body 11; alternatively, the sound outlet 111 is provided on the left side of the body 11, and the functional opening 112 is provided on the right side of the body 11. The speaker module 12 is far away from the functional opening 112, so that sound short circuit caused by superposition of normal and reverse phase sound waves due to close-range sound leakage is avoided, and the low-frequency resonance frequency of the sound system is developed and the expressive force of the sound system in a low-frequency area is enhanced by utilizing the resonance cavity formed by the internal space of the electronic equipment and the functional opening 112.

In some embodiments, the functional aperture 112 is positioned at a distance k times the length of the diagonal of the body 11 from the sound outlet 111, k being greater than or equal to 0.5.

On the basis of the above embodiment, the position of the functional opening 112 is k times the length of the diagonal line of the body 11, for example, a mobile phone with a length of 12cm and a width of 8cm, and the diagonal line is 15cm, and when the functional opening 112 is arranged at the bottom of the body 11 and the functional opening 112 is arranged at the top of the body 11, the value of k is 0.8; when the sound outlet 111 is provided on the left side of the body 11, the functional opening 112 is provided on the right side of the body 11, and k has a value of 053. The larger the value of K is, the further the position of the functional opening 112 is from the position of the sound outlet 111 is, so when K is greater than or equal to 0.5, the further the position of the functional opening 112 is from the position of the sound outlet 111 as far as possible, and the sound short circuit caused by the superposition of the forward and reverse sound waves due to the close-range sound leakage is avoided.

In some embodiments, the length of the sound guiding channel is s times the width of the body 11, s being greater than 0.1.

On the basis of the above embodiment, the length of the sound guiding channel refers to the lengths of the sound guiding channels of the functional opening 112 and the sound outlet 111. The length of the sound guide channel is s times of the width of the body 11, s is greater than 0.1, and it can be understood that the greater s is, the longer the length of the sound guide channel is, so that the further the distance between the position of the functional opening 112 and the position of the sound outlet 111 is ensured, and the sound short circuit caused by the superposition of forward and reverse phase sound waves due to close-range sound leakage is further avoided.

In some embodiments, each of the functional apertures 112 has an area m times the area of the body 11, m being less than 0.025.

On the basis of the above embodiment, the area of each functional opening 112 is m times the area of the body 11, m being less than 0.025. It will be appreciated that the smaller m indicates that the smaller the area of the functional opening 112, the function opening 112 is positively correlated with the resonance frequency according to helmholtz resonator theory, and thus the smaller the area of the functional opening 112, the smaller the resonance frequency, and thus, by utilizing the functional opening, i.e., the low frequency performance of the loudspeaker box is improved by utilizing the resonance effect.

In some embodiments, the electronic device further includes a display screen, and the display screen and the middle frame are adhered by a dispensing process.

On the basis of the above embodiment, as shown in fig. 5, an internal structure of the electronic device is schematically shown. For the display screen of the mobile phone, in the existing design, the waterproof and antistatic functions are required, the display screen and the middle frame are adhered together through a dispensing process, so that the front sealing performance of the mobile phone is good, and then the back sealing performance of the mobile phone is good through a whole circle of complete foam glue adhered to the middle frame of the mobile phone, so that the internal space of the mobile phone is a closed space, further the inverse sound wave signal is ensured to oscillate and attenuate in the closed cavity, and the problem of sound short circuit caused by superposition of the inverse sound wave signal is avoided.

In some embodiments, the volume of the interior space is n times the volume of the body 11, n being greater than 0.1.

On the basis of the above embodiment, the volume of the internal space is n times the volume of the body 11, n being greater than 0.1. It can be understood that the larger n indicates that the larger the volume of the internal space, the larger the volume of the internal space is inversely related to the resonance frequency according to the helmholtz resonator theory, so that the smaller the volume of the internal space is, the smaller the resonance frequency is, and therefore, by designing the open type sound cavity, the volume of the internal space is increased, and the low-frequency performance of the sound box is further improved.

More specifically, the inverted acoustic wave signal resonates inside the resonant cavity, changing the low frequency response characteristic of the entire speaker system. According to the helmholtz resonator theory, the resonance frequency f can be calculated by the following relation: f=cx [ a/(VxL) ] 1/2/(2xn), where C is the propagation speed of sound in air 340m/s, a is the open area of the resonant cavity, V is the volume of the resonant cavity, and L is the length of the acoustic path of the resonant cavity. With typical simulation values on the mobile phone, a is about 19mm2 of the open pore area of the USB and the earphone seat, V is about 21600mm3 of the free space in the mobile phone, L is about 8mm of the length of the sound guide channels of the USB and the earphone seat, and the resonance frequency f can be calculated to be close to 541Hz. The low frequency resonance frequency of the closed speaker system on the mobile phone is generally about 800-950 Hz. The design of the open cavity is adopted, so that the problem of sound short circuit is avoided, resonance of the open cavity is utilized, low-frequency response characteristics of the loudspeaker system are effectively widened, and better low-frequency performance of the electronic equipment can be achieved.

It should be noted that the electronic device may be a mobile phone, or may be a mobile or non-mobile terminal, such as a notebook computer, a tablet, etc., which is not limited in this application. The technical effect of the speaker module for the electronic device is the same as that of the speaker module of the mobile phone in the above embodiment, and will not be described herein.

The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.

Reference throughout this specification to "multiple embodiments," "some embodiments," "one embodiment," or "an embodiment," etc., means that a particular feature, component, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in various embodiments," "in some embodiments," "in at least one other embodiment," or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, components, or characteristics may be combined in any suitable manner in one or more embodiments. Thus, a particular feature, component, or characteristic shown or described in connection with one embodiment may be combined, in whole or in part, with features, components, or characteristics of one or more other embodiments, without limitation. Such modifications and variations are intended to be included within the scope of the present application.

Furthermore, those skilled in the art will appreciate that the various aspects of the invention are illustrated and described in the context of a number of patentable categories or circumstances, including any novel and useful procedures, machines, products, or materials, or any novel and useful modifications thereof. Accordingly, aspects of the present application may be performed entirely by hardware, entirely by software (including firmware, resident software, micro-code, etc.) or by a combination of hardware and software. The above hardware or software may be referred to as a "data block," module, "" engine, "" terminal, "" component, "or" system. Furthermore, aspects of the present application may take the form of a computer product, comprising computer-readable program code, embodied in one or more computer-readable media.

It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims

1. An electronic device, the electronic device comprising:

the surface of the body is provided with a sound outlet and a functional opening; the sound outlet and the functional opening are positioned at the two non-adjacent ends of the body, and the inner space of the body is a closed space;

the loudspeaker module comprises a vibrating diaphragm;

the vibrating diaphragm divides the internal space of the body into an independent open sound resonance cavity and a sound guide channel, the opening of the sound guide channel is the sound outlet, and the opening of the open sound resonance cavity is the functional opening;

the length of the sound guide channel is s times of the width of the body, and s is more than 0.1;

each of the functional aperture areas is m times the body area, m being less than 0.025;

the volume of the inner space is n times of the volume of the body, and n is more than 0.1.

2. The electronic device of claim 1, wherein the body further comprises a rear housing, the rear housing being integrally formed.

3. The electronic device of claim 1, wherein the body further comprises a center, the center being integrally formed.

4. The electronic device of claim 1, wherein the sound outlet is provided at a bottom of the body and the functional opening is provided at a top of the body;

5. The electronic device of claim 1, wherein the functional aperture is located at a distance k times the length of the body diagonal from the sound outlet aperture, k being equal to or greater than 0.5.

6. The electronic device of claim 3, further comprising a display screen, wherein the display screen is affixed to the center by a dispensing process.