CN115633295A

CN115633295A - Housing, speaker system, and electronic apparatus

Info

Publication number: CN115633295A
Application number: CN202211261221.5A
Authority: CN
Inventors: 高莎; 程有宏; 金明昱; 周俊; 白琦凡
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2022-10-14
Filing date: 2022-10-14
Publication date: 2023-01-20

Abstract

The application provides a shell, a loudspeaker system and an electronic device, wherein the shell is provided with a sound cavity and a sound outlet hole; the sound cavity at least comprises a front cavity, the front cavity is provided with an opening used for installing a loudspeaker, the front cavity is located in the sound outlet direction of the loudspeaker, the front cavity at least comprises an original cavity part and a sound outlet channel, the original cavity part is right opposite to the loudspeaker, the sound outlet channel is communicated with the original cavity part and extends towards the side of the loudspeaker along a strip-shaped path, the sound outlet hole is communicated to the extending end, far away from the original cavity part, of the sound outlet channel, and the sound outlet channel is arranged in the sound outlet direction of the loudspeaker in a staggered mode. The shell reduces the resonance frequency of the loudspeaker system by improving the structure of the front cavity, thereby improving the frequency response sensitivity of the low-frequency band of the loudspeaker system and providing a new means for improving the low-frequency performance of the loudspeaker system. In practical application, the shells with different resonant frequencies can be arranged according to the new means so as to meet different requirements of users on bass performance.

Description

Housing, speaker system, and electronic apparatus

Technical Field

The application relates to the technical field of loudspeaker front cavity design, in particular to a shell, a loudspeaker system and electronic equipment.

Background

For electronic equipment such as a mobile phone, a notebook computer or a tablet computer, the quality of sound effect is a key index for people to select products, and the low-frequency performance of a loudspeaker system in the electronic equipment is an important consideration factor for judging the quality of the sound effect and is very important for the influence on user experience. However, the current means for improving the low-frequency performance is generally to improve the performance of the speaker itself or increase the back cavity space, but the two methods have very limited adjustment space and benefit for the low-frequency performance of the speaker.

Disclosure of Invention

The application provides a casing, speaker system and electronic equipment, has solved present electronic equipment to the adjustment space of low frequency performance and income all very limited problem.

In order to achieve the purpose, the technical scheme is as follows:

in a first aspect, a housing for mounting a speaker is provided, the housing having a sound cavity and a sound outlet; the sound cavity at least comprises a front cavity, the front cavity is provided with a first opening used for installing the loudspeaker, the front cavity at least comprises an original cavity part and a sound outlet channel, the original cavity part is over against the first opening and is positioned in the sound outlet direction of the loudspeaker, a second opening is formed in the side wall of the original cavity part, the sound outlet channel is communicated with the second opening and extends towards the side of the original cavity part, the sound outlet hole is communicated to the extending end, far away from the second opening, of the sound outlet channel, and the sound outlet channel is arranged in the sound outlet direction of the loudspeaker in a staggered mode. This casing has increased the sound quality of ante-chamber through addding out the sound passageway, because loudspeaker system resonant frequency f is the inverse ratio with the evolution of ante-chamber sound quality to reduced loudspeaker system's resonant frequency f, improved loudspeaker system at the frequency response sensitivity of low frequency channel, realized the promotion of loudspeaker system's low frequency income. In practical application, can set up the casing that has different resonant frequency according to this new means to satisfy the user to the different demands of bass performance, it is bigger to the adjustment space of low frequency performance, it is higher to set up the flexibility, the cost is lower, and low frequency performance income is higher.

As one embodiment of the first aspect, the sound cavity further includes a back cavity communicating with the first opening, and the front cavity and the back cavity are separated by a diaphragm of the speaker. Therefore, the shell is provided with the front cavity and the rear cavity to form a complete loudspeaker system, and a sound cavity is not required to be enclosed by other structural parts of the electronic equipment, so that the loudspeaker is convenient to assemble.

As one embodiment of the first aspect, a plane of the extending path of the sound outlet channel is perpendicular to the sound outlet direction of the loudspeaker, so as to facilitate processing.

As one embodiment of the first aspect, the opening direction of the sound outlet hole is perpendicular to the sound outlet direction of the speaker, so as to facilitate playing Kong Tongxiang with an electronic device.

As one of the embodiments of the first aspect, the sound outlet channel extends along a straight path to reduce acoustic resistance.

As one embodiment of the first aspect, an inner wall of the sound outlet channel is rounded to reduce the acoustic resistance.

As one embodiment of the first aspect, the sound outlet channel has at least a bent portion, and the bent portion extends along a bent path so as to adapt to a non-linear trend of a mounting gap in the electronic device.

As one embodiment of the first aspect, the sound outlet channel at least has a uniform section, and the size of the cross-sectional area of the uniform section is constant along the extending direction of the sound outlet channel, so that sound can be stably transmitted; and/or the presence of a gas in the gas,

the sound outlet channel is at least provided with a divergent section, and the sectional area of the divergent section is gradually increased along the extension direction of the sound outlet channel so as to enlarge the sound effect; and/or the presence of a gas in the gas,

the sound outlet channel at least has a tapered section, and the sectional area of the tapered section is gradually reduced along the extension direction of the sound outlet channel so as to increase the sound quality.

As one of the embodiments of the first aspect, the sound cavity further includes at least one cavity portion communicating to the sound outlet channel. The loudspeaker system can enable the frequency response curve to generate a resonance peak in the intermediate frequency band by arranging the resonance cavity part, and the existence of the resonance peak can enable the sound intensity of the frequency band between the resonance frequency of the loudspeaker system and the frequency of the wave peak of the resonance peak to be increased, so that the sound intensity of the intermediate frequency band of the loudspeaker system is improved.

As one example of the first aspect, the cavity portion is embedded in the sound outlet channel, and may correspond to a region where the cross-sectional area of the sound outlet channel is suddenly increased, and the cavity portion may increase the sound intensity of the mid-frequency band of the speaker system.

As one embodiment of the first aspect, the resonant cavity part is communicated to the inner wall of the sound outlet channel through a connecting channel, and the cross-sectional area of the connecting channel is smaller than that of the resonant cavity, so that the resonant cavity part can improve the sound intensity of the midrange frequency band of the loudspeaker system.

As one embodiment of the first aspect, the plurality of cavity portions are provided, and the plurality of cavity portions are arranged to be shifted in the extending direction of the sound outlet channel.

As one embodiment of the first aspect, a damping structure for increasing the acoustic resistance is provided on the housing to reduce the peak strength of the resonance peak.

In a second aspect, a speaker system is provided, which includes a speaker and the housing as described in the above embodiments, where the speaker is disposed at the first opening, and the first opening is sealed by a diaphragm, and the speaker is capable of emitting sound towards the original cavity. The loudspeaker system improves the frequency response sensitivity of the low-frequency band through the arrangement of the sound outlet channel in the shell, so that the low-frequency performance is improved.

As one embodiment of the second aspect, the housing includes an upper housing and a lower housing that are butted with each other, the upper housing has the sound cavity, the sound cavity has a mounting opening, the lower housing covers the mounting opening, and the mounting opening is convenient for the speaker to be mounted in the sound cavity.

In a third aspect, an electronic device is provided, which includes a speaker and the housing as described in the above embodiments, where the speaker is disposed at the first opening, and the first opening is sealed by a diaphragm, and the speaker can emit sound toward the original cavity. The electronic equipment forms a sound cavity through the shell, and a loudspeaker system is not arranged independently.

As one embodiment of the third aspect, the housing includes a screen assembly, a middle frame, a rear cover, and an internal structural member, which are connected in sequence, and the screen assembly, the middle frame, the rear cover, and the internal structural member together enclose the front cavity. Therefore, the mounting gap in the electronic equipment can be fully utilized, the mounting gap can be completely used for forming the front cavity, and the space for arranging the sound outlet channel is enlarged.

Drawings

FIG. 1 is a cross-sectional view of a current general speaker system;

fig. 2 is a schematic structural diagram of a speaker system according to an embodiment of the present application;

fig. 3 is a cross-sectional view in the thickness direction of the speaker system provided in fig. 2;

fig. 4 is a sectional view of a housing of the speaker system provided in fig. 2 in a thickness direction;

FIG. 5 is a cross-sectional view of a housing taken perpendicular to the thickness direction provided by one embodiment of the present application;

FIG. 6 is a cross-sectional view of a housing taken perpendicular to the thickness direction according to another embodiment of the present application

Fig. 7 is a perspective structural view of a speaker system according to an embodiment of the present application;

fig. 8 is an exploded view of the speaker system provided in fig. 7;

fig. 9 is a cross-sectional view of the speaker system provided in fig. 7;

fig. 10 is a cross-sectional view of the speaker system provided in fig. 7, taken perpendicular to the thickness direction;

FIG. 11 is a graph of the frequency response of the speaker system provided in FIG. 7 and a current general speaker system;

FIG. 12 is a cross-sectional view of a housing taken perpendicular to the thickness direction according to an embodiment of the present application, wherein the acoustic cavity includes a resonant cavity portion;

FIG. 13 is a frequency response graph of the speaker system provided in FIG. 12 and a current general speaker system;

fig. 14 is a perspective view of a speaker system according to an embodiment of the present application, wherein the housing includes only a front chamber;

figure 15 is an exploded view of the speaker system provided in figure 14;

fig. 16 is a cross-sectional view of the speaker system provided in fig. 14, taken perpendicular to the thickness direction;

FIG. 17 is a cross-sectional view of a housing taken perpendicular to the thickness direction according to another embodiment of the present application;

fig. 18 is a perspective view of an electronic device according to an embodiment of the present application;

FIG. 19 is an exploded view of the electronic device provided in FIG. 18;

fig. 20 is a cross-sectional view of the electronic device provided in fig. 18.

Description of reference numerals:

100', a housing; 101', a front cavity; 102', a rear cavity; 103', sound outlet holes; 900', a loudspeaker; 901', a vibrating diaphragm;

100. a housing; 101. a sound cavity; 1011. an installation port; 102. a sound outlet hole; 103. a front cavity; 1031. a lumen portion; 1031a, original cavity bottom wall; 1031b, side wall of original cavity; 1032. a sound outlet channel; 1032a, a sound outlet top wall; 1032b, a sound outlet bottom wall; 1032c, a sound outlet side wall; 111. a bending section; 10321. a uniform section; 10321a, a first uniform segment; 10321b, a second uniform segment; 10321c, a third uniform segment; 10322. a gradual expansion section; 10323. a tapered section; 104. a first opening; 105. a second opening; 106. a rear cavity; 107. a resonant cavity portion; 107a, a resonant bottom wall; 107b, a resonant sidewall; 108. a connecting channel; 109. seeding holes; 11. a sound outlet pipe; 12. a mounting structure; 13. an upper shell; 14. a lower case; 15. a reinforcement column; 16. a screen assembly; 17. a middle frame; 18. a rear cover; 19. a baffle plate; 900. a speaker; 901. vibrating diaphragm; 200. a speaker system.

Detailed Description

Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "inner", "outer", "top", "bottom", and the like, as used herein, refer to an orientation or positional relationship based on that shown in the drawings, which is for convenience and simplicity of description only, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present application.

In order to facilitate clear description of technical solutions of the embodiments of the present application, in the embodiments of the present application, terms such as "first", "second", "third", and the like are used to distinguish the same items or similar items having substantially the same functions and actions. For example, the first limiting part and the second limiting part are only used for distinguishing different limiting parts, and the sequence of the first limiting part and the second limiting part is not limited. Those skilled in the art will appreciate that the terms "first," "second," "third," and the like do not denote any order or quantity, nor do the terms "first," "second," "third," and the like denote any order or importance.

It is noted that the terms "in one embodiment," "for example," and the like are used herein to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "one embodiment" or "for example" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the phrases "as one embodiment" or "such as" is intended to present relevant concepts in a concrete fashion.

In this application, unless expressly stated or limited otherwise, the terms "connected" and "coupled" are to be construed broadly, as they may be, for example, fixedly coupled, detachably coupled, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

For the reader's understanding, the following explains the occurrence of terms in the present application:

acoustic mass: the sound field counteracts the co-vibrating mass, i.e. the acoustic mass, on the sound source.

Sound compliance: the air movement in the cavity causes the pressure change in the cavity, which reacts to the air in the cavity and acts as an "air spring", which is acoustically compliant, similar to a mechanical compliance.

Resonance frequency: the resonant frequency at which the loudspeaker system is designed.

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments.

For electronic equipment such as mobile phones, notebook computers or tablet computers, the quality of sound effect becomes a key index for people to select products, the sound effect of the electronic equipment is determined by a loudspeaker system in the electronic equipment, and the low-frequency performance of the loudspeaker system is a main consideration factor for judging the quality of the sound effect, and is of great importance for the influence on user experience.

Generally, frequencies below 1000Hz are called low-frequency bands, and in order to improve the low-frequency performance of a speaker system, there are two commonly used means, one is to improve the performance of the speaker itself, and the other is to enlarge the back cavity space of the speaker system. The former approach has higher requirements on the performance of the loudspeaker itself, is limited by materials and processes, has limited adjustment space and benefit for the low-frequency performance of the loudspeaker system, and has low cost performance, so the latter approach is often adopted, namely the low-frequency performance of the loudspeaker system is improved by enlarging the rear cavity space of the loudspeaker system.

Referring to fig. 1, a currently-used speaker system includes a housing 100' and a speaker 900', the housing 100' is formed with a sound cavity, the speaker 900' is disposed in the sound cavity, a diaphragm 901' of the speaker 900' divides the sound cavity into a front cavity 101' and a rear cavity 102', the front cavity 101' and the rear cavity 102' are arranged along a thickness direction of an electronic device, the front cavity 101' is located in a sound emitting direction of the speaker 900', the front cavity 101' is defined by a groove-shaped structure, the groove-shaped structure includes a groove bottom wall and a groove side wall defined in a circumferential direction of the groove bottom wall, the diaphragm 901' of the speaker 900' is defined by a groove side wall, the diaphragm 901' faces the groove bottom wall of the groove-shaped structure, the front cavity 101' is disposed opposite to the speaker 900' in the sound emitting direction of the speaker 900', the groove side wall is defined by a sound emitting hole 103', the speaker 900' emits sound towards the front cavity 101', and the sound is emitted through the sound emitting hole 103 '. To improve the low frequency performance of the loudspeaker system, the volume of the rear cavity 102 'may be increased or the rear cavity 102' may be filled with sound absorbing particles (Bass).

When the speaker system is installed in the electronic device, the front cavity 101 'is adjacent to the playing hole of the electronic device, so that the sound emitted from the sound emitting hole 103' is emitted toward the playing hole. The volume of the front chamber is limited by the amplitude and size of the loudspeaker, and the volume of the front chamber is generally set to be small as long as the reliability requirement is met. The rear cavity 102 'is closer to the middle region of the electronic device than the front cavity 101', and the volume of the rear cavity 102 'is more limited by the overall structure and internal structural members of the electronic device, and in practical applications, the volume of the rear cavity 102' cannot be increased as required. The filling of the sound-absorbing particles not only increases the processing cost, but also may pollute the speaker 900', so that a protective cover needs to be arranged on the speaker 900', the process difficulty is increased, and the capacity expansion effect of the sound-absorbing particles is limited. It can be seen that the means of enlarging the back volume 102 'space is superior to the means of boosting the performance of the loudspeaker 900' itself, but the tuning space and performance gains for the low frequency performance of the loudspeaker system are also very limited.

Referring to fig. 2 and 3, the present application provides a housing 100, a speaker system 200 and an electronic device, wherein the speaker system 200 includes a speaker 900 and the housing 100, and the electronic device is an electronic device provided with the speaker system 200 or an electronic device provided with the speaker 900 and the housing 100 formed by a structural member of the electronic device. The present enclosure 100 reduces the resonant frequency of the speaker system 200 by improving the structure of the front cavity 103, thereby improving the low frequency response sensitivity of the speaker system 200 and providing a new means for improving the low frequency performance of the speaker system 200. In practical application, the casing 100 with different resonant frequencies can be set according to the new means to meet different requirements of users on bass performance, the adjustment space for low-frequency performance is larger, the setting flexibility is higher, the cost is lower, and the low-frequency performance benefit is higher.

The following embodiment describes an electronic apparatus provided with the speaker system 200 as an electronic apparatus that plays audio through the speaker system 200. The electronic device includes, but is not limited to, a tablet phone, a foldable phone, an e-reader, a notebook computer, a desktop computer, a tablet computer, a Personal Digital Assistant (PDA), a smart watch, a calculator, or a game pad.

Take electronic equipment as the panel computer for example, this electronic equipment is including the screen subassembly that links to each other in proper order, the center, back lid and control module, the both sides of center are located respectively to screen subassembly and back lid, the screen subassembly, center and back lid enclose jointly and establish the formation lumen, speaker system 200 and control module all locate the lumen, and all connect in the center, control module is used for controlling screen subassembly display image, and control speaker system 200 broadcast audio frequency, control module includes but not limited to the mainboard, locate device and structure etc. on the mainboard, set up the broadcast hole with the lumen intercommunication on the center, speaker system 200 can play audio frequency towards the broadcast hole, the audio frequency spreads electronic equipment through the broadcast hole.

Referring to fig. 3, the speaker system 200 includes a speaker 900 and a housing 100, the speaker 900 is mounted on the housing 100, the speaker 900 is used for emitting sound, and the housing 100 is used for improving the frequency response sensitivity of the low frequency band and providing the resonant frequency of the speaker system 200 meeting the user requirement.

Loudspeaker 900 includes the framework, magnetic circuit assembly, vibrating diaphragm 901 and voice coil loudspeaker voice coil, magnetic circuit assembly and vibrating diaphragm 901 connect respectively in the both sides of framework, magnetic circuit assembly, vibrating diaphragm 901 and framework enclose jointly and establish and form the drive chamber, the voice coil loudspeaker voice coil is connected in one side of vibrating diaphragm 901 towards magnetic circuit assembly, and be located the drive intracavity, the voice coil loudspeaker voice coil can produce magnetic field through electromagnetic induction after the circular telegram, and reciprocating motion under magnetic force effect at magnetic circuit assembly, in order to drive vibrating diaphragm 901 vibration, vibrating diaphragm 901 sends sound through the vibration. The diaphragm 901 of the loudspeaker 900 is oriented in the sound emitting direction of the loudspeaker 900.

Referring to fig. 3 and 4, the casing 100 has a sound cavity 101 and a sound outlet hole 102 connected to the sound cavity 101.

Wherein the sound cavity 101 comprises at least a front cavity 103, the front cavity 103 has a first opening 104, and the first opening 104 is used for mounting the speaker 900. When the loudspeaker 900 is assembled with the housing 100, the loudspeaker 900 may be mounted at the first opening 104, and the loudspeaker 900 seals the first opening 104 by the diaphragm 901.

The front cavity 103 at least comprises a primary cavity portion 1031 and a sound outlet passage 1032, the primary cavity portion 1031 faces the first opening 104 and is located in the sound outlet direction of the loudspeaker 900, the inner wall of the primary cavity portion 1031 has a primary cavity bottom wall 1031a and a primary cavity side wall 1031b annularly arranged on the primary cavity bottom wall 1031a, the primary cavity side wall 1031b is a side wall of the primary cavity portion 1031, the primary cavity side wall 1031b can surround to form the first opening 104, that is, the primary cavity portion 1031 is in a groove-shaped structure, and the first opening 104 is a notch of the groove-shaped structure. The primary chamber part 1031 has a secondary opening 105 formed in the primary chamber side wall 1031b, and the sound outlet passage 1032 communicates with the secondary opening 105 and extends laterally of the primary chamber part 1031. The side of the original chamber section 1031 is the direction of the original chamber side wall 1031b of the original chamber section 1031. The sound outlet hole 102 communicates with an extended end of the sound outlet channel 1032 away from the second opening 105, and the sound outlet channel 1032 is disposed offset from the speaker 900 in the sound outlet direction of the speaker 900.

It is understood that the sound outlet channel 1032 has a first extending end and a second extending end, the sound outlet channel 1032 extends from the first extending end to the second extending end, and an extending path of the sound outlet channel 1032 from the first extending end to the second extending end is in a shape of a bar. The first extending end of the sound outlet channel 1032 is connected to the second opening 105, the second extending end is the extending end of the sound outlet channel 1032 far away from the second opening 105, the second extending end is located at the side of the original cavity portion 1031, and the sound outlet hole 102 is connected to the second extending end. After the loudspeaker 900 is mounted in the first opening 104, the original cavity bottom wall 1031a of the original cavity part 1031 faces the diaphragm 901 of the loudspeaker 900, i.e. the original cavity part 1031 overlaps the loudspeaker 900 in the sound emitting direction of the loudspeaker 900, and the sound emitting channels 1032 are offset from the loudspeaker 900 in the sound emitting direction of the loudspeaker 900. The speaker 900 emits sound toward the primary chamber portion 1031, and the sound outlet passage 1032 can guide the sound in the primary chamber portion 1031 to propagate from the first extended end to the second extended end and finally to be emitted from the sound outlet hole 102. The wall surface of the original cavity bottom wall 1031a of the original cavity 1031 may be a plane and substantially parallel to the diaphragm 901 of the speaker 900, or may be a curved surface, a folded surface or have a step structure, which is not limited herein, and the cross-sectional shape of the original cavity side wall 1031b includes, but is not limited to, a circle, a square or an irregular figure.

It should be noted that the shape of the extending path of the sound outlet channel 1032 includes, but is not limited to, a straight line shape, a curved line shape, a broken line shape, etc., and the extending path may extend in the same plane, and may also not be limited to the same plane, as long as it is located in the housing 100, and is not limited herein.

The primary chamber part 1031 corresponds to the front chamber 103 of the conventional general speaker system 200, and in this embodiment, the sound outlet passage 1032 is added to the front chamber 103 of the housing 100 in comparison with the front chamber 103 of the housing 100 of the conventional general speaker system 200, so that the sound emitted from the speaker 900 toward the primary chamber part 1031 is transmitted through the sound outlet passage 1032 and then is transmitted through the sound outlet hole 102.

And the acoustic mass m in the loudspeaker system front volume 103 is obtained according to the following equation:

where ρ is an air density, l is an extension length of the front cavity 103, s is a sectional area of the front cavity 103, the extension length of the front cavity 103 is an extension length in a sound propagation direction in the front cavity 103, and the sectional area of the front cavity 103 is a sectional area perpendicular to the extension direction of the front cavity 103.

In this embodiment, the extension length of the front chamber 103 is extended, i.e., the value of l is increased, by the provision of the sound outlet passage 1032, so that the sound mass m of the front chamber 103 of the housing 100 is increased.

The resonance frequency f of the loudspeaker system is obtained according to the following formula:

where c is the acoustic compliance and m is the system equivalent mass including the air load acoustic mass.

According to the above formula, it can be seen that the resonant frequency f of the speaker system 200 is inversely proportional to the evolution of the acoustic mass m of the front cavity 103, and when the acoustic mass m of the front cavity 103 increases, the resonant frequency f of the speaker system 200 becomes smaller, that is, the housing 100 reduces the resonant frequency f of the speaker system 200 by additionally providing the sound channel 1032, so that the frequency response sensitivity of the speaker system 200 in the low frequency band is improved, and the improvement of the low frequency gain of the speaker system 200 is realized. Thus, the present embodiment achieves tuning of the low frequency performance of the loudspeaker system 200 by varying the extension of the front cavity 103 of the housing 100.

Specifically, the formula associated with the resonant frequency f of the speaker system 200 may be varied as:

wherein. f. of ₀ Is the resonance frequency of the speaker system 200 without the sound channel 1032 being set, Δ f is the frequency change value of the resonance frequency of the speaker system 200, m ₀ Δ m is the acoustic mass of the sound outlet channel 1032, which is the system equivalent mass including the acoustic mass of the primary chamber part 1031.

In the above formula, f ₀ And m ₀ For constant values, the frequency variation Δ f of the resonant frequency of the speaker system 200 is only associated with the sound output channelThe acoustic mass Δ m of lane 1032 is correlated, where Δ f is negative when f decreases. The larger Δ m, the smaller f, the larger the absolute value of Δ f, i.e., the larger the amplitude of the drop in the resonant frequency f of the speaker system 200, and thus the resonant frequency f of the speaker system 200 can be adjusted by adjusting the magnitude of Δ m. Where Δ m can be obtained according to the following formula:

where ρ is the air density, l is the extended length of the sound outlet channel 1032, and s is the cross-sectional area of the sound outlet channel 1032.

As can be seen from this equation, the acoustic mass Δ m of sound outlet channel 1032 is proportional to the length l of sound outlet channel 1032 and inversely proportional to the cross-sectional area s of sound outlet channel 1032. In order to increase the acoustic mass am of the sound outlet channel 1032, this can be achieved either by reducing the cross-sectional area s of the sound outlet channel 1032 or by increasing the length l of the sound outlet channel 1032.

However, if the cross-sectional area s of the sound outlet channel 1032 is reduced, the acoustic boundaries on opposite sides of the inner wall of the sound outlet channel 1032 may be brought closer together, increasing the acoustic resistance of the sound as it passes through the sound outlet channel 1032, resulting in a reduction in the performance gain of the speaker system 200. Therefore, in practical applications, the cross-sectional area s of the sound outlet channel 1032 is not generally adjusted, but the sound quality Δ m of the sound outlet channel 1032 is adjusted by adjusting the length l of the sound outlet channel 1032, so as to adjust the resonant frequency of the speaker system 200.

In production practice, the problem of how to improve the low frequency performance of the loudspeaker system 200 can be transformed into the problem of how to lower the resonance frequency of the loudspeaker system 200. After determining the resonant frequency f or the frequency variation Δ f of the speaker system 200 required to meet the low-frequency performance requirement of the user, the resonant frequency of the speaker system 200 required to meet the low-frequency performance requirement of the user may be calculated, and then the required sound quality Δ m of the sound output channel 1032 may be calculated, and the required set length l of the sound output channel 1032 may be calculated according to the required sound quality Δ m of the sound output channel 1032. Thus, the resonant frequency of the speaker system 200 can be reduced to a desired resonant frequency by adding the sound outlet channel 1032 with a corresponding extension length, thereby meeting different requirements of users on the low-frequency performance of the speaker system 200.

In summary, the housing 100 improves the structure of the front cavity 103 by adding the sound outlet channel 1032, so as to improve the low-frequency performance of the speaker system 200, and provide a new means for improving the low-frequency performance. The adjustment of the resonant frequency of the speaker system 200 can be achieved by setting the sound outlet channels 1032 of different lengths, the adjustment space is increased, and the controllability of the low-frequency performance adjustment is improved. Because the front cavity 103 is closer to the edge of the electronic device than the rear cavity, and is further away from the middle area of the electronic device, more internal structural members can be avoided, so that the available space of the sound outlet channel 1032 is more than that of the rear cavity, the trend of the extension path of the sound outlet channel 1032 can be arranged according to the distribution of the available space in the electronic device, the setting flexibility and the practicability of the sound outlet channel 1032 are improved, and the cost is low.

It should be noted that after the other components and structures of the electronic device are assembled, the area near the broadcast aperture is the installation area of the conventional speaker system 200, and since the installation area is close to the broadcast aperture, the installation space is larger than the space available in the rear cavity, but the space available for the sound outlet channel 1032 is still very limited. To solve this problem, the mounting region of the speaker system 200 may be extended toward the inside of the electronic device, and the extended path of the sound outlet channel 1032 may be set by making full use of the mounting gap between the components and the structural members inside the electronic device. It can be understood that, there is generally a mounting gap communicating with the playing hole between the devices and the structural members inside the electronic device, the mounting gap is a configurable space for configuring the sound outlet channel 1032, and the sound outlet hole 102 of the casing 100 can be close to and directly opposite to the playing hole of the electronic device. To increase the extension length of the sound outlet channel 1032, the sound outlet channel 1032 of the housing 100 may be adapted to the mounting gap and extend along the extension path of the mounting gap, the loudspeaker 900 being arranged at the inner end of the mounting gap, or the sound outlet channel 1032 extending in the mounting gap in a winding or bending manner. The sound emitted from the speaker 900 toward the original chamber portion 1031 propagates through the sound outlet passage 1032 extending along the extending path of the mounting gap, and finally is emitted from the sound hole 102 through the sound outlet hole. Thus, the housing 100 makes full use of the remaining space inside the electronic device to extend the length of the sound channel 1032, thereby saving more cost.

Referring to fig. 4, in order to save materials and save the space occupied by the casing 100, the casing 100 has a tubular sound outlet pipe 11, and the sound outlet pipe 11 is formed by bending a plate material and enclosing to form a sound outlet channel 1032. For the convenience of processing, the sound outlet pipes 11 are located on the same plane, that is, the extending paths of the sound outlet channels 1032 are located on the same plane.

Since the structural members of the electronic device are generally stacked in the thickness direction, the extension paths of the mounting gaps formed between the structural members and the components are located on the same plane, and the plane of the mounting gaps is perpendicular to the thickness direction of the electronic device, and in order to adapt to the mounting gaps, the plane of the sound outlet tube 11 is also perpendicular to the thickness direction of the electronic device, that is, the plane of the extension path of the sound outlet channel 1032 is perpendicular to the thickness direction of the speaker 900.

For example, referring to fig. 5, the sound channel 1032 has at least one bending portion 111, and the bending portion 111 extends along the bending path. The bend 111 may be used to avoid other devices or structures in the electronic device or simply to extend the length of the sound channel 1032. In practical applications, the bending portions 111 with different numbers and bending degrees can be set according to the extending path and the space size of the installation gap in the electronic device. It should be noted that the other portions of the sound outlet channel 1032 except the bent portion 111 may extend along a straight line, and the sound outlet channel 1032 may be formed by only connecting a plurality of bent portions 111 in sequence.

When the wall surface of the inner wall of the sound outlet channel 1032 has an included angle, the two wall surfaces forming the included angle are too close to each other, which may result in an increase in acoustic resistance. To solve this problem, please refer to fig. 5, the corners of the inner wall of the sound channel 1032 can be set to be smooth. Accordingly, the corner formed by the corner of each bending portion 111 may also be configured as a smooth transition to minimize the acoustic resistance of the bending portion 111.

However, if the bending part 111 of the sound channel 1032 is too much, the friction and reaction of the wall surface of the sound channel 1032 to the sound will be increased, the energy of the sound wave will be consumed, the acoustic resistance in the sound transmission process will be increased, and even noise will be generated, and the performance benefit of the sound will be reduced. Therefore, the sound outlet channel 1032 may be arranged to extend along a straight line as much as possible, that is, the bent portion 111 may not be provided or may be provided less, and for this reason, when other devices or structural members in the electronic apparatus are arranged, the arrangement positions of the other devices or structural members may be adjusted to reserve the mounting gap extending along a straight line for the housing 100.

Illustratively, referring to fig. 6, the sound outlet channel 1032 has a uniform section 10321, and the cross-sectional area of the uniform section 10321 is constant along the sound propagation direction, and correspondingly, the cross-sectional area of the portion of the sound outlet pipe 11 corresponding to the uniform section 10321 is also constant, so as to facilitate processing. The uniform section 10321 can achieve stable propagation of sound.

Illustratively, referring to fig. 6, the sound outlet channel 1032 has a diverging section 10322, and the cross-sectional area of the diverging section 10322 gradually increases in size along the propagation direction of the sound. The gradually increasing cross-sectional area of the sound outlet channel 1032 can reduce the acoustic resistance and achieve the sound amplification effect.

Illustratively, referring to fig. 6, the sound outlet channel 1032 has a tapered section 10323, and the size of the cross-sectional area of the tapered section 10323 is gradually reduced along the sound propagation direction. The gradual reduction in cross-sectional area of the sound outlet channel 1032 can increase the acoustic mass, but also increase the acoustic resistance to some extent.

It should be noted that the sound propagation direction is an extending direction of the sound outlet channel 1032 from the first extending end to the second extending end. The diverging section 10322 reduces the acoustic resistance but reduces the acoustic mass, and the converging section 10323 increases the acoustic mass but increases the acoustic resistance to some extent, and the two functions are opposite. In practical applications, the sound outlet pipe 11 can be adapted to the installation gap, and the number, position and extension length of the uniform section 10321, the divergent section 10322 and the convergent section 10323 in the sound outlet channel 1032 can be adjusted according to the size of the installation gap in the electronic device and the requirement for low frequency performance. The uniform section 10321, the gradually expanding section 10322 and the gradually contracting section 10323 may extend along a straight line or along a curved path, that is, the uniform section 10321, the gradually expanding section 10322 and the gradually contracting section 10323 may be provided with the bending portion 111.

Referring to fig. 7 and 8, as one embodiment, the sound cavity 101 includes a front cavity 103 and a rear cavity 106 communicating with the first opening 104, the housing 100 may have a mounting structure 12 in the sound cavity 101, the mounting structure 12 is used for mounting the speaker 900, and the speaker 900 is connected to the housing 100 through the mounting structure 12 and seals the first opening 104. It is understood that the mounting structure 12 includes, but is not limited to, a mounting step for abutting against the speaker 900, a mounting frame for receiving the speaker 900, or a mounting groove for receiving the speaker 900, and is not limited thereto, as long as the speaker 900 can be positioned. The front chamber 103 is separated from the back chamber 106 by a diaphragm 901 of the loudspeaker 900, i.e. after mounting the loudspeaker 900, the diaphragm 901 isolates the front chamber 103 from the back chamber 106 to avoid air venting between the front chamber 103 and the back chamber 106. Wherein the drive chamber is located within the rear chamber 106. The speaker 900 emits sound toward the front chamber 103, and the sound is emitted out of the casing 100 through the sound emission hole 102.

As the electronic device is gradually thinned, the housing 100 is also thinner and thinner to form a flat structure, in this embodiment, referring to fig. 8 and 9, the housing 100 includes an upper shell 13 and a lower shell 14, the upper shell 13 has a sound cavity 101, the mounting structure 12 is disposed in the upper shell 13, the rear cavity 106 has a mounting opening 1011, the speaker 900 can be placed in the sound cavity 101 through the mounting opening 1011 and connected to the mounting structure 12, and the lower shell 14 covers the mounting opening 1011, so that the rear cavity 106 is sealed. The housing 100 has a thickness direction in which the housing 100 needs to be thinned, and the front cavity 103 and the rear cavity 106 are arranged in the thickness direction of the housing 100. To accommodate the configuration of the enclosure 100, the speaker 900 within the enclosure 100 is also generally flat. In order to save space, the thickness direction of the speaker 900 is the same as the thickness direction of the housing 100, the magnetic circuit assembly, the frame body, and the diaphragm 901 are sequentially arranged along the thickness direction of the speaker 900, the original cavity portion 1031 and the back cavity 106 are arranged along the thickness direction of the speaker 900, and the sound emitting direction of the speaker 900 is also the thickness direction.

In other embodiments, the sound cavity 101 may include only the front cavity 103, and the speaker 900 may be mounted to the housing 100 directly or via other structural members, as long as the diaphragm 901 of the speaker 900 can seal the first opening 104, and the rear cavity 106 of the speaker system 200 is enclosed by other structural members of the electronic device and is not disposed in the housing 100.

In the embodiment shown in the figures, referring to fig. 9 and 10, the original chamber side wall 1031b of the original chamber portion 1031 includes four original chamber partial walls connected end to end, each original chamber partial wall is rectangular, and the original chamber bottom wall 1031a is also rectangular, i.e. the two original chamber side walls 1031b are equal in size and parallel. The second opening 105 is opened on one of the original cavity walls, and the second opening 105 is rectangular.

The sound outlet channel 1032 extends along a straight line, the cross section of the sound outlet channel 1032 in the direction perpendicular to the extending direction of the sound outlet channel 1032 is rectangular, the inner wall of the sound outlet channel 1032 has a sound outlet top wall 1032a, a sound outlet bottom wall 1032b and two sound outlet side walls 1032c, the sound outlet bottom wall 1032b and the sound outlet top wall 1032a are arranged opposite to each other in the thickness direction of the casing 100, and the distance between the sound outlet top wall 1032a and the sound outlet bottom wall 1032b is the height of the sound outlet channel 1032. The two sound emitting side walls 1032c are connected with the top wall and the bottom wall of the sound emitting channel 1032, the two sound emitting side walls 1032c are arranged oppositely, and the distance between the two sound emitting side walls 1032c is the width of the sound emitting channel 1032. The port of the sound outlet channel 1032 is directly connected to the second opening 105, the port of the sound outlet channel 1032 is located at the first extending end of the sound outlet channel 1032 and is formed by enclosing a sound outlet top wall 1032a, a sound outlet bottom wall 1032b and two sound outlet side walls 1032c together, and the port of the sound outlet channel 1032 is adapted to the second opening 105. In other embodiments, the second opening 105 may also communicate with the sound outlet sidewall 1032c of the sound outlet channel 1032, which is not limited herein.

Referring to fig. 10, the size of the second opening 105 can be smaller than the size of the wall of the original cavity, so as to reduce the space occupied by the sound outlet channel 1032.

However, at this time, the remaining wall surface of the original cavity partition where the second opening 105 is located may block sound from propagating toward the sound outlet channel 1032, so the size of the second opening 105 may be set to be the same as the size of the original cavity partition where the second opening 105 is located, that is, the height of the second opening 105 in the height direction of the sound outlet channel 1032 is equal to the distance between the diaphragm 901 of the speaker 900 and the original cavity bottom wall 1031a, and the width of the second opening 105 in the width direction of the sound outlet channel 1032 is equal to the distance between the original cavity partitions on both sides thereof, so as to ensure that sound is outputted smoothly at the second opening 105, and reduce the acoustic resistance of sound at the second opening 105. At this time, the original chamber side wall 1031b of the original chamber portion 1031 is equivalent to having only three original chamber walls, the two sound outlet side walls 1032c are respectively connected to the original chamber side walls 1031b on both sides of the second opening 105, the sound outlet bottom wall 1032b is connected to the original chamber bottom wall 1031a, the sound outlet top wall 1032a is approximately flush with the diaphragm 901 of the speaker 900, and the height of the sound outlet passage 1032 is approximately equal to the height of the original chamber portion 1031, so that the sound resistance is reduced and the sound volume is increased.

In the illustrated embodiment, with continued reference to fig. 9, the thickness of the sound outlet pipe 11 is substantially the same as the total thickness of the casing 100, so as to facilitate the machining of the casing 100, the sound outlet channel 1032 includes a uniform section 10321 and a divergent section 10322 connected to each other, the divergent section 10322 is located between the original cavity part 1031 and the uniform section 10321, and the height of the divergent section 10322 increases gradually along the sound propagation direction. The size of the port of the divergent section 10322, which is connected to the first opening 104, is the same as the size of the first opening 104, and since the loudspeaker 900 occupies a certain thickness of the casing 100, the height of the first opening 104 is smaller, and the divergent section 10322 can fully utilize the height of the sound outlet pipe 11 to increase the cross-sectional area of the sound outlet channel 1032, so that the propagation surface of sound is increased, more sound energy is transmitted to the outside by the sound source, and a certain sound amplification effect is achieved.

Since the sound outlet is generally disposed at a side of the electronic device, the opening direction of the sound outlet 102 is generally perpendicular to the sound outlet direction of the speaker 900, so that the sound is emitted from the sound outlet. Referring to fig. 10, in the illustrated embodiment, the sound outlet hole 102 is opened on the sound outlet side wall 1032c of the second extending end of the sound outlet channel 1032, and the extending direction of the sound outlet channel 1032 is perpendicular to the opening direction of the sound outlet hole 102.

When the sound outlet channel 1032 is formed by enclosing the sound outlet pipe 11, the sound outlet pipe 11 can be close to the edge of the electronic device and extend along the edge of the electronic device, so that the occupation of the middle space of the electronic device is reduced. The sound outlet hole 102 may be arranged in a diverging shape along the sound propagation direction to achieve a certain sound amplification effect.

In other embodiments, the sound outlet hole 102 may also be opened on the end wall of the sound channel 1032 at the second extending end, in this case, the sound outlet hole 102 may be formed by the port of the sound outlet pipe 11 to reduce the acoustic resistance of the sound at the sound outlet hole 102. In practical applications, the sound outlet 102 may be substantially facing the play hole of the electronic device, and the specific opening direction is not limited.

Fig. 11 is a frequency response graph of a speaker system 200, in which a dotted line is a frequency response curve of the speaker system provided in the embodiment of the present application, and a solid line is a frequency response curve of a current general speaker system. As can be seen from this fig. 11, as the low-frequency performance of the speaker system 200 is gradually enhanced, the resonance frequency of the speaker system 200 is decreased, but the intensity of the frequency region thereof is also gradually decreased as the resonance frequency of the speaker system 200 is decreased, resulting in a decrease in the frequency response sensitivity of the mid-frequency band.

To solve this problem, referring to fig. 12, the front chamber 103 further includes at least one cavity portion 107, and the cavity portion 107 communicates with the sound outlet channel 1032. The cavity part 107 is a cavity with certain acoustic compliance and acoustic mass, when the frequency of the acoustic wave is the same as the natural frequency of the cavity part 107, the two parts resonate, and the frequency response curve has a resonance peak at the resonance frequency. Fig. 13 is a frequency response graph of a speaker system provided with a cavity portion, in which a dotted line is a frequency response curve of the speaker system provided with the cavity portion according to the embodiment of the present application, and a solid line is a frequency response curve of a current general speaker system. As can be seen from fig. 13, the speaker system 200 may have a resonant cavity 107, such that the frequency response curve generates a resonant peak in the mid-frequency band, and the existence of the resonant peak may increase the sound intensity of the frequency band between the resonant frequency of the speaker system 200 and the frequency of the peak of the resonant peak, thereby increasing the sound intensity of the mid-frequency band of the speaker system 200. The intermediate frequency band is generally a 1k-8kHz band.

Frequency f at which the peak of the resonance peak is located _h Can be obtained according to the following formula:

where m is the acoustic mass of the sound outlet channel 1032 and c is the compliance.

The compliance c can be obtained according to the following formula:

wherein, c ₀ At the speed of sound, ρ is the air density and V is the volume of the cavity part 107.

c ₀ Under the condition of constant rho, the larger the volume V of the resonant cavity part 107 is, the larger the acoustic compliance c is, and the smaller the frequency of the peak of the resonant peak is, and in practical application, the volume of the resonant cavity part 107 can be set according to the requirement on the position of the peak in the frequency response curve.

Referring to fig. 12, the number of the resonant cavities 107 may be multiple, the multiple resonant cavities 107 may be arranged in a staggered manner in sequence along the extending direction of the sound outlet channel 1032, the arrangement position is not limited, and two adjacent resonant cavities 107 may be spaced apart. The volumes of the cavity parts 107 are set to be different, and the cavity parts 107 with different volumes can generate wave peaks in different frequency bands of a frequency response curve, so that the same number of resonance peaks as the cavity parts 107 appear on the frequency response curve. In practical application, the number of the resonant cavity parts 107 can be adjusted according to the requirement of the number of the resonant peaks with different frequencies.

However, too high a peak value at the peak of the resonance peak in the frequency response curve may result in more complicated tuning of the audio frequency of the whole machine and poorer sound effect. In this regard, the peak at the peak of the resonance peak may be reduced by increasing the acoustic resistance of the cavity portion 107. However, this also causes a reduction in the overall sound intensity of the entire loudspeaker system 200, and in practical applications, the acoustic resistance of the cavity part 107 can be adjusted according to the actual situation and needs. There are various ways to increase the acoustic resistance of the resonant cavity 107, such as adjusting the structure of the resonant cavity 107, or providing a damping structure on the casing 100 to increase the acoustic resistance of the resonant cavity 107, wherein the damping structure can be provided on the wall of the resonant cavity, or in the sound propagation direction, such as in the sound outlet channel or at the sound outlet hole 102.

As one of the embodiments, with continued reference to fig. 12, the cavity portion 107 is embedded in the sound outlet channel 1032, and the sectional area of the cavity portion 107 in the direction perpendicular to the extending direction of the sound outlet channel 1032 is larger than that of the sound outlet channel 1032. It is understood that the cavity portion 107 may be provided between the sound outlet channel 1032 and the sound outlet hole 102, and the cavity portion 107 may be provided in the middle of the sound outlet channel 1032, that is, the sound outlet channel 1032 may be divided into two sub-channels in the extending direction thereof by the cavity portion 107, where the extending length of the sound outlet channel 1032 is the sum of the extending lengths of the two sub-channels. The position of the cavity portion 107 may be arranged according to the remaining space of the mounting gap of the electronic apparatus, and is not particularly limited.

Note that, in this embodiment, the cavity portion 107 can be regarded as a section in which the cross-sectional area of the sound passage 1032 is suddenly increased.

Wherein the sectional area of the cavity part 107 in the direction perpendicular to the extending direction of the sound outlet channel 1032 can be set to be constant along the extending direction of the sound outlet channel 1032, and the volume V of the cavity part 107 can be obtained according to the following formula:

V＝s·l

where s is a sectional area of the cavity part 107 in a direction perpendicular to the extending direction of the sound outlet channel 1032, and l is a length of the cavity part 107 in the extending direction of the sound outlet channel 1032.

In the case where the cavity section 107 has a constant volume, in order to increase the acoustic resistance of the cavity section 107, one way may be to set the cavity section 107 such that the sectional area s is reduced and the length l is increased to narrow the sound-emitting boundary of the sound, thereby increasing the acoustic resistance. Another way may be to provide a damping structure on the cavity wall of the cavity part 107 which may increase the roughness of the cavity wall of the cavity part 107 to increase the friction when sound passes through the cavity part 107 and thus increase the acoustic resistance. In another way, a damping structure may be additionally arranged in the front cavity 103 or at the sound outlet hole 102, and the damping structure can achieve a filtering effect to a certain extent, so as to increase the acoustic resistance, and the damping structure may be a mesh cloth packaged at the sound outlet hole 102.

Referring to fig. 12, in the illustrated embodiment, the inner wall of the resonant cavity portion 107 has a resonant top wall, a resonant bottom wall 107a and two resonant side walls 107b, each resonant side wall 107b is connected to the resonant top wall and the resonant bottom wall 107a, the two resonant side walls 107b are arranged oppositely and in parallel, a distance between the two resonant side walls 107b is a width of the resonant cavity portion 107, the resonant top wall and the resonant bottom wall 107a are arranged oppositely and in parallel, and a distance between the resonant top wall and the resonant bottom wall 107a is a height of the resonant cavity portion 107. In practical applications, the extension length of the installation gap left for the sound tube 11 is limited, and the thickness of the installation gap is substantially fixed, so that the bottom resonance wall 107a is flush with the sound outlet bottom wall 1032b, the top resonance wall is flush with the sound outlet top wall 1032a, the two side resonance walls 107b are respectively arranged corresponding to the positions of the two side walls of the sound outlet channel 1032, and the volume of the resonance cavity part 107 can be realized by controlling the width of the resonance cavity part 107. In the illustrated embodiment, at least one of the resonant sidewalls 107b of the resonant cavity portion 107 protrudes from the corresponding sound outlet sidewall 1032c of the sound outlet channel 1032, that is, one resonant sidewall 107b of the resonant cavity portion 107 is flush with the sound outlet sidewall 1032c of the corresponding sound outlet channel 1032, and the other resonant sidewall 107b protrudes from the sound outlet sidewall 1032c of the corresponding sound outlet channel 1032 toward the side of the width direction of the sound outlet channel 1032, or both resonant sidewalls 107b of the resonant cavity portion 107 protrude from the sound outlet sidewall 1032c of the corresponding sound outlet channel 1032 toward the side of the width direction of the sound outlet channel 1032.

For example, referring to fig. 14 and 15, the casing 100 is flat, the sound cavity 101 has only the front cavity 103, the speaker 900 is disposed at the first opening 104 and seals the first opening 104, the second opening 105 is communicated with the sound outlet sidewall 1032c of the sound outlet channel 1032, and the reinforcement pillar 15 may be disposed at the second opening 105 to reinforce the structural strength at the second opening 105.

Referring to fig. 16, the sound outlet channel 1032 has only a uniform section 10321, no divergent section 10322 and no convergent section 10323, that is, the width of the sound outlet channel 1032 along the extending direction is not changed. The uniform section 10321 has two bending portions 111, and is divided into a first uniform section 10321a, a second uniform section 10321b, and a third uniform section 10321c by the two bending portions 111, which are sequentially connected along the extending direction of the sound channel 1032, the first uniform section 10321a and the second uniform section 10321b are connected by the one bending portion 111, so that the second uniform section 10321b is bent relative to the first uniform section 10321a, the second uniform section 10321b and the third uniform section 10321c are connected by the other bending portion 111, so that the third uniform section 10321c is bent relative to the second uniform section 10321b, as shown in the figure, the extending direction of the third uniform section 10321c is parallel to the extending direction of the first uniform section 10321 a. Wherein, two resonant cavity parts 107 are arranged in the sound cavity 101, one resonant cavity part 107 is embedded in the second uniform section 10321b, the extension length of the resonant cavity part 107 can be the same as that of the second uniform section 10321b, and the other resonant cavity part 107 is embedded in the third uniform section 10321c. The heights of both cavity parts 107 are the same as the height of the sound outlet channel 1032, and the widths of both cavity parts 107 are larger than the width of the sound outlet channel 1032.

As another embodiment, referring to fig. 17, the cavity portion 107 communicates with the inner wall of the sound outlet channel 1032 through a connecting channel 108. Here, the cavity portion 107 is located at a side of the sound outlet channel 1032, and the cavity portion 107 may be communicated to any inner wall position of the sound outlet channel 1032 through the connection channel 108, specifically, to any side wall position of the sound outlet channel 1032 through the connection channel 108. In the illustrated embodiment, the extending direction of the connection channel 108 is the direction from the sound outlet channel 1032 to the cavity part 107, the width direction of the connection channel 108 is the direction perpendicular to the extending direction thereof, and the width direction of the cavity part 107 is the same as the width direction of the connection channel 108. Wherein the connecting channel 108 is a channel having a width smaller than that of the cavity portion 107, so that the connecting channel 108 has a sectional area smaller than that of the cavity portion 107. It should be noted that the cavity portion 107 may be located in the direction of the sound outlet ceiling 1032a or the direction of the sound outlet bottom wall 1032b of the sound outlet channel 1032 as the installation gap space allows.

There are various ways of arranging the electronic device, and the electronic device may not be provided with the housing 100 of the speaker system 200 alone, but may be enclosed by the inherent structure of the electronic device to form the sound cavity 101.

Referring to fig. 18, as some embodiments, the electronic device includes a speaker 900 and a housing 100, the housing 100 has a front cavity 103 and a sound outlet 102, the speaker 900 is directly installed in the housing 100 and is disposed at a first opening 104 of the front cavity 103, the speaker 900 seals the first opening 104 through a diaphragm, and the speaker 900 can output sound towards the front cavity 103. That is, the electronic apparatus forms the front cavity 103 through its own mounting gap to further increase the available space of the front cavity 103, saving the mounting step.

Referring to fig. 19 and 20, taking an electronic device as a tablet pc as an example, the housing 100 may include a screen assembly 16, a middle frame 17, a rear cover 18, and an internal structure (not shown) connected in sequence, where the internal structure is mounted on the middle frame 17 and includes, but is not limited to, a control module and a bracket, where the control module includes, but is not limited to, a motherboard, and devices and structures disposed on the motherboard. The screen assembly 16, the middle frame 17, the rear cover 18 and the internal structural members are arranged together to form a front cavity 103.

Specifically, the screen assembly 16, the middle frame 17, the rear cover 18 and the internal structural member are commonly surrounded to form a mounting gap, the mounting gap is communicated to the sound outlet 102, and the sound outlet 102 of the casing 100 is a playing hole of the electronic device. The loudspeaker 900 is arranged in the installation gap, and the loudspeaker 900 seals a section of the installation gap through the diaphragm 901, the section forming the first opening 104 of the front cavity 103, and the front cavity 103 is formed between the diaphragm 901 and the sound outlet 102. The mounting gap forms an original cavity 1031 between the speaker 900 and the rear cover 18 and a sound outlet channel 1032 between the screen assembly 16 and the rear cover 18, wherein a reinforcing post 15 for reinforcing the structural strength of the front cavity 103 is provided at the second opening 105. It should be noted that the installation gap may be formed by an inherent structural member or device in the internal structural member to form an inner wall, but the inherent structural member or device in the internal structural member may be disposed at intervals, which may not ensure that the inner wall of the front cavity 103 is closed, for this reason, the internal structural member may further include a baffle 19, and the baffle 19 is used to form all or part of the inner wall of the front cavity 103, for example, the baffle 19 may be connected to the gap between the inherent structural member and device in the internal structural member in a sealing manner, so as to close the inner wall forming the installation gap of the front cavity 103, and may also directly form a sound outlet sidewall of the sound outlet channel 1032 and an original cavity sidewall of the original cavity 1031. The extended path of the front chamber 103 can be made smoother by the provision of the baffle plate 19 while reducing the acoustic resistance.

Finally, it should be noted that: the above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A shell is used for mounting a loudspeaker and is characterized in that the shell is provided with a sound cavity and a sound outlet hole;

the sound cavity at least comprises a front cavity, the front cavity is provided with a first opening used for mounting the loudspeaker, the front cavity at least comprises an original cavity part and a sound outlet channel, the original cavity part is over against the first opening and is positioned in the sound outlet direction of the loudspeaker, a second opening is formed in the side wall of the original cavity part, the sound outlet channel is communicated with the second opening and extends towards the side of the original cavity part, the sound outlet hole is communicated to the extending end, far away from the second opening, of the sound outlet channel, and the sound outlet channel is arranged in a staggered mode with the loudspeaker in the sound outlet direction of the loudspeaker.

2. The housing of claim 1 wherein the acoustic chamber further comprises a back chamber in communication with the first opening, the front chamber being separated from the back chamber by a diaphragm of the loudspeaker.

3. A housing as claimed in claim 1, characterized in that the plane of the extension path of the sound outlet channel is perpendicular to the sound outlet direction of the loudspeaker.

4. The housing of claim 3, wherein the opening direction of the sound outlet hole is perpendicular to the sound outlet direction of the speaker.

5. A housing according to claim 3, wherein the sound outlet channel extends along a rectilinear path.

6. The housing of claim 1, wherein the inner wall of the sound outlet channel is rounded.

7. The casing according to any one of claims 1 to 6, wherein the sound outlet channel has at least a bent portion, and the bent portion extends along a bent path.

8. The housing according to any one of claims 1 to 7, wherein the sound outlet channel has at least a uniform section, and the size of the cross-sectional area of the uniform section is constant along the extending direction of the sound outlet channel; and/or the presence of a gas in the atmosphere,

the sound outlet channel at least has a divergent section, and the sectional area of the divergent section is gradually increased along the extension direction of the sound outlet channel; and/or the presence of a gas in the gas,

the sound outlet channel at least has a tapered section, and the sectional area of the tapered section is gradually reduced along the extension direction of the sound outlet channel.

9. The housing according to any one of claims 1 to 8, wherein the sound cavity further comprises at least one cavity portion communicating to the sound outlet channel.

10. The housing according to claim 9, wherein the cavity portion is embedded in the sound outlet channel.

11. The housing according to claim 9, wherein the resonating chamber section communicates to an inner wall of the sound outlet passage through a connecting passage having a sectional area smaller than that of the resonating chamber section.

12. The housing according to any one of claims 9 to 11, wherein a plurality of the cavity portions are provided, and the plurality of cavity portions are arranged in a staggered manner in an extending direction of the sound outlet passage.

13. A casing as claimed in any one of claims 9 to 12, wherein the casing is provided with damping means for increasing acoustic resistance.

14. A loudspeaker system comprising a loudspeaker and a housing according to any one of claims 1 to 13, the loudspeaker being arranged at the first opening and being sealed by a diaphragm, the loudspeaker being able to emit sound towards the primary chamber portion.

15. The speaker system of claim 14 wherein the housing comprises an upper shell and a lower shell that are mated to each other, the upper shell having the acoustic chamber, the acoustic chamber having a mounting opening, the lower shell covering the mounting opening.

16. An electronic device comprising a speaker and a housing according to any one of claims 1 to 13, wherein the speaker is disposed at the first opening and the first opening is sealed by a diaphragm, and the speaker is capable of emitting sound toward the cavity portion.

17. The electronic device of claim 16, wherein the housing comprises a screen assembly, a middle frame, a back cover, and an internal structure, which are connected in sequence, and the screen assembly, the middle frame, the back cover, and the internal structure together enclose the front cavity.