CN113923288A

CN113923288A - Electronic device

Info

Publication number: CN113923288A
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: 2022-01-11
Anticipated expiration: 2041-09-29
Also published as: CN113923288B

Abstract

An embodiment of the present application provides an electronic device, including: 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 two ends of the body which are not adjacent; 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 hole. This application is through the design of open speaker rear chamber, need not be for the special airtight sound chamber of speaker design, only occupy the overall arrangement space of speaker body, and adopt open sound chamber design, compare in traditional speaker need additionally design an inclosed casing, make a module the speaker dress inside, the space that the speaker occupy has significantly reduced, utilize the inner structure space of electronic equipment body and the resonance characteristic of function trompil formation cavity simultaneously, the low frequency expression of speaker system has been strengthened.

Description

Electronic device

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. Loudspeakers produce sound, relying on the vibration of their diaphragms, which push air into vibration, thereby producing a sound wave signal. In order to avoid the short circuit of sound, the conventional design in the industry adopts a closed sound cavity to separate front and back opposite-phase sound of the loudspeaker, and this design method needs to occupy a large space volume (about four times the structural size of the loudspeaker itself) and is limited by the volume of the sound cavity, and the low-frequency resonance frequency of sound is generally 800 and 950Hz, so that the whole sound system has great attenuation in the low-frequency region, and cannot reproduce the low-frequency sound component of sound well, and meanwhile, due to the limitation of the closed sound cavity, the low-frequency sound performance of the loudspeaker system is poor.

Content of application

The embodiment of the application provides a mobile device to solve the technical problems that a closed sound cavity adopted by a current loudspeaker needs to occupy large space and volume and the low-frequency sound performance is poor.

The application provides an electronic device, including: 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 two ends of the body which are not adjacent;

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 the sound outlet, and the opening of the open sound resonant cavity is the functional hole.

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

In a specific embodiment, the body further comprises a rear shell, and the rear shell is integrally formed.

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

In one 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 one specific embodiment, the position of the functional opening is k times the length of the diagonal line of the body away from the sound outlet, and k is greater than or equal to 0.5.

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

In one embodiment, each of said functional openings has an area m times the area of said body, m being less than 0.025.

In a specific implementation mode, the electronic device further comprises a display screen, and the display screen is adhered to the middle frame through a dispensing process.

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

An embodiment of the present application provides an electronic device, including: 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 two ends of the body which are not adjacent; 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 the sound outlet, and the opening of the open sound resonant cavity is the functional hole. This application is through the design of open speaker rear chamber, need not be for the special airtight sound chamber of speaker design, only occupy the overall arrangement space of speaker body, and adopt open sound chamber design, compare in traditional speaker need additionally design an inclosed casing, make a module the speaker dress inside, the space that the speaker occupy has significantly reduced, utilize the inner structure space of electronic equipment body and the resonance characteristic of function trompil formation cavity simultaneously, the low frequency expression of speaker system has been strengthened.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

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 diagram illustrating a diaphragm of a speaker module vibrating to generate a sound wave signal according to an embodiment;

FIG. 4 is a schematic diagram of a sound wave signal generated by vibration of a diaphragm of a speaker module according to another embodiment;

fig. 5 is a schematic diagram illustrating an internal structure of an electronic device according to an embodiment.

Reference numerals

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

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The electronic device provided by the embodiment 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 surface of the body 11 is provided with a sound outlet and a functional opening; the sound outlet and the functional opening are positioned at two ends of the body 11 which are not adjacent;

a speaker module 12 including a diaphragm 121;

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

The body 11 that this application embodiment provided is the basic installation component of electronic equipment, and it can provide the installation basis for speaker module 12. The speaker module 12 is a sound generating component of the electronic device, and the speaker module 12 can enable the electronic device to release sound, such as playing music, playing video, and the like. The vibrating diaphragm 121 divides the inner space of the body 11 into an independent open sound cavity and a sound guiding channel, and the opening of the open sound cavity is the functional opening 112, so that excessive reflection and attenuation of sound wave signals are reduced, and the sound effect of the speaker is improved. The opening of the sound guide channel is the sound outlet hole 111, so that 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 located at two ends of the body 11, which are not adjacent to each other, the sound outlet 111 is a hole site for outputting sound from the speaker module 12, and the functional opening 112 refers to a hole site of the electronic device for implementing each functional module, such as an earphone hole site, a USB hole site, and a signal input hole site. By providing the functional opening 112 on the body 11, the resonance effect can be utilized to improve the low frequency performance of the speaker module 12. The sound outlet holes 111 and the functional openings 112 are located at two ends of the body 11, which are not adjacent to each other, so that the distance between the functional openings 112 and the sound outlet holes 111 is as far as possible, and the internal open space is increased, for example, the functional openings 112 are located at the top of the body 11 or the sound outlet holes 111 are located at the left side of the body 11, and the functional openings 112 are 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 because of the resonant frequency, the larger the space is determined by the vibrating diaphragm 121 of the speaker module 12 and the space around the vibrating diaphragm 121, the smaller the resistance applied during the vibration process of the vibrating diaphragm 121 of the speaker module 12 is, the lower the resonant frequency is, and the better the low-frequency performance is achieved. And because the loudspeaker module is assembled in the loudspeaker module without specially designing a sealed shell module, the volume occupied by the loudspeaker module 12 is reduced, the design requirement that more and more functional modules of the electronic equipment need more and more compact space dimensions is met, and the light and thin design of the electronic equipment is favorably realized.

Based on the above setting, reduced the volume that speaker module 12 occupy in electronic equipment, satisfied the more and more functional module to electronic equipment and needed the more and more compact space dimension's design requirement, utilize the internal structure space of electronic equipment body and function open pore to form the resonance characteristic of cavity simultaneously, strengthened the low frequency expression of speaker system.

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

In the above embodiment, the inner 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 additional structural space is occupied for the closed sound cavity. Taking a mobile phone as an electronic device as an example, the speaker size specification of a commonly used mobile phone is 1115 speakers, the structural size of which is 11 × 15 × 2.5(mm), 1217 speakers, and the structural size of which is 12 × 17 × 2.35 (mm). The loudspeaker module is sealed by adopting the cavity, so that acoustic wave signal cancellation is avoided, for the 1115 loudspeaker, the required space size is 16x21x4.5(mm) and is close to the size specification of 4 times of the loudspeaker according to simulation evaluation, and for the 1217 loudspeaker, the required space size is 18x23x4.3(mm) and is close to the size specification of 4 times of the loudspeaker. For the dense and compact environment inside the mobile phone, the cost is very large, compared with the existing design, the volume occupied by the loudspeaker module is greatly reduced, the electronic equipment is a good closed space by fully utilizing the electronic equipment, and the sound wave signal sent by the loudspeaker module 12 is transmitted from the sound outlet through the sound guide channel, so that the reversed sound wave signal is transmitted in the internal open space of the electronic equipment, and the problem that the sound signal is attenuated and reduced due to sound short circuit is solved.

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

In the above embodiments, continuing to take the mobile phone as an example, the mobile phone screen is required to be waterproof and antistatic in the current design, so the front sealing performance of the mobile phone is good, and the mobile phone back shell 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, which is a schematic diagram of the diaphragm 121 of the speaker module 12 vibrating to generate a sound wave signal, when a current signal passes through the voice coil of the speaker module 12, the voice coil will be vibrated up and down by the ampere force of the magnetic steel field of the voice coil, so as to drive the diaphragm 121 of the speaker module 12 to vibrate up and down. The diaphragm 121 vibrates upwards to compress the air above the diaphragm, and the air below the diaphragm is stretched and diluted; the diaphragm 121 vibrates downward, stretching the air above the diluting membrane, while the air below the membrane is compressed. The acoustic signal is thus generated and propagated in the form of longitudinal waves. From the physical process of acoustic signal generation, it can be seen that: the acoustic signal is a vector. The upper and lower sides of the diaphragm 121 have acoustic signals simultaneously and are in opposite relationship to each other. The diaphragm 121 vibrates upwards to compress the air above the diaphragm to generate positive-phase sound waves, and the air below the diaphragm is stretched and diluted to generate opposite-phase sound waves; the diaphragm vibrates downwards, stretching the air above the diluting diaphragm to generate reverse-phase sound waves, and compressing the air below the diaphragm to generate positive-phase sound waves. If the acoustic signals above and below the diaphragm are added together, they will cancel each other out, making the sound less attenuated. Although the speaker module 12 is still continuously operated by applying the power signal, the diaphragm 121 is continuously vibrated up and down, but no effective sound wave signal is generated, which is called as 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 sound wave signals above (front cavity) and below (rear cavity) the diaphragm from being superimposed on each other. Compared with the prior art that the speaker module 12 is sealed in a small cavity, the sound wave signal above the diaphragm 121 of the speaker module 12 is spread outwards, and the signal below the diaphragm 121 is sealed in the cavity, as shown in fig. 4, the sound wave signal is generated by the vibration of the diaphragm 121 of the speaker module 12 of the electronic device in the embodiment, and the sound wave signal in the opposite phase oscillates and attenuates in the sealed cavity, so that the problem of sound short circuit caused by the superposition of the sound wave signal in the positive phase 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 middle frames on the four sides of the electronic device are integrally formed, and except for the functional opening 112, such as a USB hole, an earphone hole, a signal input hole, and the like, there is no place with poor sealing, that is, the internal spaces of other bodies all have good sealing performance, so that the problem that the attenuation of the sound signal 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; or, the sound outlet 111 is disposed on the left side of the body 11, and the functional opening 112 is disposed on the right side of the body 11.

In the above embodiment, the sound outlet holes 111 are far from the respective functional openings 112, for example, the sound outlet holes 111 are provided at the bottom of the body 11, and the functional openings 112 are provided at the top of the body 11; or, the sound outlet 111 is disposed on the left side of the body 11, and the functional opening 112 is disposed on the right side of the body 11. The speaker module 12 is far away from the functional opening 112, so that a sound short circuit caused by superposition of positive and negative sound waves due to close-distance sound leakage is avoided, and the low-frequency resonant frequency of the sound system is developed by using the resonant cavity formed by the internal space of the electronic equipment and the functional opening 112, so that the expressive force of the speaker module in a low-frequency region is enhanced.

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

On the basis of the above embodiment, the distance between the position of the functional opening 112 and the sound outlet 111 is k times the length of the diagonal line of the body 11, and taking a mobile phone with a length of 12cm and a width of 8cm as an example, the length of the diagonal line is 15cm, when the sound outlet 111 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 disposed on the left side of the body 11, the functional opening 112 is disposed on the right side of the body 11, and the value of k is 053. The larger the value of K is, the farther the position of the functional opening 112 is from the position of the sound outlet 111 is, so that when K is greater than or equal to 0.5, the position of the functional opening 112 is ensured to be as far as possible from the position of the sound outlet 111, and sound short circuit caused by superposition of positive and negative sound waves due to close-distance 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 embodiments, the length of the sound guide channel refers to the length of the sound guide channel of the functional opening 112 and the sound outlet hole 111. The length of the sound guide channel is s times of the width of the body 11, s is larger than 0.1, and understandably, the larger s is, the longer the length of the sound guide channel is, so that the farther the position of the functional opening 112 is from the position of the sound outlet hole 111 is, and the sound short circuit caused by the superposition of positive and negative sound waves due to close-distance 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, and m is less than 0.025.

On the basis of the above embodiment, the area of each functional opening 112 is m times of the area of the body 11, and m is less than 0.025. It can be understood that the smaller m indicates the smaller area of the functional opening 112, and it can be known from the helmholtz resonator theory that the area of the functional opening 112 is positively correlated with the resonance frequency, so that the smaller area of the functional opening 112 makes the resonance frequency smaller, and therefore, by using the functional opening, the improvement of the low-frequency performance of the sound box by using the resonance effect is realized.

In some embodiments, the electronic device further comprises a display screen, and the display screen and the middle frame are pasted through a dispensing process.

On the basis of the above embodiments, as shown in fig. 5, it is a schematic diagram of an internal structure of an electronic device. To the display screen of cell-phone, in present design, require waterproof, antistatic, the display screen with the center pastes together through the point gluing technology for the preceding leakproofness of cell-phone is fine, again because cell-phone backshell integrated into one piece, pastes together through a complete circle of complete bubble celloidin with the cell-phone center, makes the back leakproofness of cell-phone better, makes the inner space of cell-phone equipment be airtight space, and then guarantees that the acoustic wave signal of opposition oscillates in airtight cavity the decay, has avoided the problem with positive phase acoustic wave signal stack, the sound short circuit appears.

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, and n is greater than 0.1. It can be understood that the larger n indicates the larger volume of the internal space, and it can be known from the helmholtz resonator theory that the volume of the internal space is inversely related to the resonance frequency, so that the larger 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 further, the low-frequency performance of the sound box is improved.

More specifically, the antiphase acoustic signal resonates within the resonant cavity, changing the low frequency response characteristics of the overall speaker system. According to the helmholtz resonator theory, the resonance frequency f can be calculated by the following relation: f is Cx [ a/(VxL) ]1/2/(2x Π), 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 sound guide channel of the resonant cavity. With typical simulation values on the mobile phone, a is about 19mm2 of the area of the openings of the USB and the earphone seat, V is about 21600mm3 of the free space inside the mobile phone, and L is about 8mm of the length of the sound guide channel of the USB and the earphone seat, the resonance frequency f can be calculated to be close to 541 Hz. The low-frequency resonance frequency of the closed loudspeaker system on the mobile phone is generally about 800-950 Hz. The open cavity design is adopted, so that the problem of sound short circuit is avoided, the resonance of the open cavity is utilized, the low-frequency response characteristic of the loudspeaker system is effectively widened, and the electronic equipment can show better low-frequency performance.

It should be noted that the electronic device may be a mobile phone, and may also be a mobile or non-mobile terminal, such as a notebook computer, a tablet, and the like, 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 embodiments, and is not described herein again.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Reference throughout this specification to "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," or the like, 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, without limitation, a particular feature, component, or characteristic illustrated or described in connection with one embodiment may be combined, in whole or in part, with a feature, component, or characteristic of one or more other embodiments. Such modifications and variations are intended to be included within the scope of the present application.

Moreover, those skilled in the art will appreciate that aspects of the present application may be illustrated and described in terms of several patentable species or situations, including any new and useful combination of processes, machines, manufacture, or materials, or any new and useful improvement thereon. Accordingly, various aspects of the present application may be embodied entirely in hardware, entirely in software (including firmware, resident software, micro-code, etc.) or in a combination of hardware and software. The above hardware or software may be referred to as "data block," module, "" engine, "" terminal, "" component, "or" system. Furthermore, aspects of the present application may be represented as a computer product, including computer readable program code, embodied in one or more computer readable media.

It is to 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 an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present 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 examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An electronic device, characterized in that the electronic device 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 two ends of the body which are not adjacent;

the loudspeaker module comprises a vibrating diaphragm;

2. The electronic device according to claim 1, wherein the internal space of the body is a closed space.

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

4. The electronic device of claim 1, wherein the body further comprises a middle frame, the middle frame being integrally formed.

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

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

7. The electronic device of claim 1, wherein the sound conduction channel has a length s times a width of the body, s being greater than 0.1.

8. The electronic device of claim 1, wherein each of said functional openings has an area m times the area of said body, m being less than 0.025.

9. The electronic device of claim 4, further comprising a display screen, wherein the display screen is attached to the middle frame by a dispensing process.

10. The electronic device of claim 1, wherein a volume of the interior space is n times a volume of the body, n being greater than 0.1.