CN107426365B - Sound cavity structure and mobile phone with same - Google Patents
Sound cavity structure and mobile phone with same Download PDFInfo
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- CN107426365B CN107426365B CN201710749024.0A CN201710749024A CN107426365B CN 107426365 B CN107426365 B CN 107426365B CN 201710749024 A CN201710749024 A CN 201710749024A CN 107426365 B CN107426365 B CN 107426365B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
- H04M1/035—Improving the acoustic characteristics by means of constructional features of the housing, e.g. ribs, walls, resonating chambers or cavities
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Telephone Set Structure (AREA)
Abstract
The invention provides a sound cavity structure and a mobile phone with the same, the mobile phone comprises a first shell, a second shell and a PCB board, wherein the PCB board is arranged in a space formed by surrounding the first shell and the second shell, a first through hole for a loudspeaker to pass through is formed in the PCB board, the sound cavity structure comprises a front sound cavity and a rear sound cavity, the rear sound cavity comprises a first rear sound cavity and a second rear sound cavity, a first concave cavity and a second concave cavity are formed in the inner wall of the first shell, the first concave cavity is arranged opposite to the first through hole, the area of the first through hole is larger than the area of the front end face of the loudspeaker, the second concave cavity is arranged opposite to a blank PCB board around the loudspeaker, a third concave cavity is formed in the inner wall of the second shell, and a second through hole for communicating the first rear sound cavity and the second rear sound cavity is formed in the blank PCB board. The sound cavity structure fully utilizes the space around the loudspeaker on the mobile phone to increase the volume of the sound cavity, and improves the tone quality of the mobile phone.
Description
Technical Field
The invention relates to the technical field of mobile phone sound cavities, in particular to a sound cavity structure and a mobile phone with the same.
Background
The main function of the mobile phone is to connect and make a call, the loudspeaker sound cavity of the mobile phone is one of important factors affecting the call quality, and the tone quality of the same sound source and the playing effect of the same loudspeaker in different sound cavities may be greatly different, and the mobile phone is more pleasant and monotonous. Fig. 1 is a schematic diagram of a conventional sound cavity structure, referring to fig. 1, a mobile phone speaker sound cavity device in the prior market includes a speaker 1 ', a mobile phone shell and a printed circuit board 4' (Printed Circuit Board, PCB), a first housing 2 'and a front end face of the speaker are sealed to form a front sound cavity 5', and a second housing 3 ', and a rear end face of the speaker 1' and the PCB are sealed to form a rear sound cavity. The back sound cavity mainly affects the low frequency part of the mobile phone bell and the earphone sound, the front sound cavity mainly affects the low frequency part of the mobile phone bell and the earphone sound, and the low frequency part of the mobile phone bell and the earphone sound has larger influence on sound quality.
Along with the progress of technology, the current intelligent mobile phone shows a trend of becoming thinner and thinner, but users pursue high configuration, large batteries and high sound quality on the mobile phone, however, on the premise of meeting the requirements of the high configuration and the large batteries of the mobile phone, the volume of a reserved sound cavity is limited, if a conventional sound cavity mode is adopted, the volume of the sound cavity required by a mobile phone loudspeaker cannot be achieved at all, and however, in order to ensure the high sound quality of the mobile phone, a certain volume of the sound cavity space must be ensured.
The invention takes the sound cavity structure as a starting point and provides a sound cavity structure and a mobile phone with the sound cavity structure.
Disclosure of Invention
The invention provides a sound cavity structure and a mobile phone with the sound cavity structure.
A first aspect of the present invention provides a sound cavity structure, applied to a mobile phone, where the mobile phone includes: the loudspeaker comprises a loudspeaker body, a first shell, a second shell and a printed circuit board, wherein the printed circuit board is arranged in a space formed by the first shell and the second shell in a surrounding mode, and a first through hole for the loudspeaker to pass through is formed in the printed circuit board;
the sound cavity structure comprises a front sound cavity and a rear sound cavity, the first shell is provided with a sound outlet hole of the loudspeaker, the front end face of the loudspeaker is arranged opposite to the sound outlet hole, and a sealing space between the inner wall of the first shell and the front end face of the loudspeaker forms the front sound cavity;
the back sound cavity comprises a first back sound cavity and a second back sound cavity, a first concave cavity and a second concave cavity are formed in the inner wall of the first shell, the first concave cavity is arranged opposite to the first through hole, the area of the first through hole is larger than that of the front end face of the loudspeaker, the second concave cavity is arranged opposite to a blank printed circuit board around the loudspeaker, a third concave cavity is formed in the inner wall of the second shell, the back end face of the loudspeaker, the first concave cavity, the third concave cavity and the printed circuit board are surrounded to form the first back sound cavity, the second concave cavity, the printed circuit board is surrounded to form the second back sound cavity, and a second through hole used for communicating the first back sound cavity and the second back sound cavity is formed in the blank printed circuit board.
As a further improvement of the sound cavity structure, the first concave cavity is arranged opposite to the loudspeaker, and the bottom area of the first concave cavity is larger than the area of the first through hole.
As a further improvement of the above-mentioned sound cavity structure, the number of the second through holes is one or more.
As a further improvement of the above-mentioned sound cavity structure, the upper end surface of the first cavity is sealed with the printed circuit board by a first foam seal.
As a further improvement of the sound cavity structure, the upper end face of the second concave cavity is sealed with the printed circuit board through a second foam pad.
As a further improvement of the sound cavity structure, a loudspeaker support is further arranged on the first shell, and the loudspeaker is arranged on the loudspeaker support.
As a further improvement of the above-mentioned sound cavity structure, the horn support is sealed with the first housing by a third foam.
As a further improvement of the sound cavity structure, a dustproof net is arranged on the front end face of the loudspeaker.
The invention further provides a mobile phone, which comprises a first shell, a second shell, a printed circuit board and a loudspeaker, wherein the printed circuit board and the loudspeaker are arranged in a shell space formed by the first shell and the second shell, the printed circuit board is provided with a first through hole for the loudspeaker to pass through, and the sound cavity structure is further arranged in the shell space.
As a further improvement of the mobile phone, the first shell is a front mobile phone shell, the second shell is a rear mobile phone shell, or the first shell is a rear mobile phone shell, and the second shell is a front mobile phone shell.
According to the sound cavity structure provided by the invention, the area of the first through hole is larger than that of the front end face of the loudspeaker, the volume of the first back sound cavity is increased, the total volume of the back sound cavity is increased through arranging the second back sound cavity and the second through hole communicated with the first back sound cavity and the second back sound cavity, and the back sound cavity influences the sound quality of the ringtone and the low-frequency part of the earphone sound production.
The mobile phone provided by the invention comprises a first shell, a second shell, a printed circuit board and a loudspeaker, wherein the printed circuit board and the loudspeaker are arranged in a shell space formed by the first shell and the second shell, a first through hole for the loudspeaker to pass through are formed in the printed circuit board, and the sound cavity structure is further arranged in the shell space.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of a conventional acoustic cavity structure;
fig. 2 is a schematic diagram of a cross-sectional structure of a sound cavity according to an embodiment of the present invention;
fig. 3 is a schematic top view of an internal structure of a sound cavity according to an embodiment of the present invention;
fig. 4 is an enlarged partial schematic view of a first housing structure of a sound cavity structure according to an embodiment of the present invention.
Reference numerals illustrate:
1. horn with horn body
2. First shell body
3. Second shell
4. Printed circuit board
5. Sound outlet
6. Front sound cavity
7. First concave cavity
8. Second concave cavity
9. Third concave cavity
10. Second through hole
11. First foam pad
12. Second foam pad
13. Horn bracket
14. Third foam
15. Fourth foam
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise specifically defined.
The main function of the mobile phone is to connect and make a call, the loudspeaker sound cavity of the mobile phone is one of important factors affecting the call quality, the same sound source and the same loudspeaker have larger tone color difference of playing effects in different sound cavities, are more pleasant, are more monotonous, the loudspeaker sound cavity device of the mobile phone on the market at present comprises a loudspeaker, a mobile phone shell and a PCB (printed circuit board), a front sound cavity is formed by sealing the front end surface of the first shell and the front end surface of the loudspeaker, a rear sound cavity is formed by sealing the rear end surface of the second shell and the rear end surface of the loudspeaker and the PCB, and the front sound cavity and the rear sound cavity are reasonably designed, so that the mobile phone bell and a receiver are more pleasant, the volume of the rear sound cavity is increased, the low-frequency characteristic of sound can be improved, and the influence of the low-frequency parts of bell sound and the receiver on the tone quality is larger.
However, the current intelligent mobile phone shows a trend of becoming thinner and thinner, but users pursue high configuration, large batteries and high sound quality for the mobile phone, the volume of a reserved sound cavity is limited on the premise of meeting the requirements of the high configuration and the large batteries of the mobile phone, if a conventional sound cavity mode is adopted, the volume of the sound cavity required by a mobile phone loudspeaker cannot be achieved at all, and a sound cavity space with a certain size must be ensured in order to ensure the high sound quality of the mobile phone. In the prior art, the surface area of the PCB inside the mobile phone generally exceeds the requirement of mounting elements, and a part of blank PCB can be remained.
The sound cavity structure and the mobile phone with the sound cavity structure provided by the invention are described in detail below with reference to specific embodiments.
Example 1
Fig. 2 is a schematic diagram of a cross-sectional structure of a sound cavity structure provided by an embodiment of the present invention, fig. 3 is a top view of an internal structure schematic diagram of a sound cavity structure provided by an embodiment of the present invention, and fig. 4 is a partially enlarged schematic diagram of a first housing structure of a sound cavity structure provided by an embodiment of the present invention. Referring to fig. 2-4, the sound cavity structure of the present embodiment is applied to a mobile phone, where the mobile phone includes a speaker 1, a first housing 2, a second housing 3, and a PCB board 4, where the PCB board 4 is disposed in a space formed by surrounding the first housing 2 and the second housing 3, a first through hole through which the speaker 1 passes is formed on the PCB board 4, the sound cavity structure includes a front sound cavity and a rear sound cavity, a sound outlet 5 of the speaker is formed on the first housing 2, a front end surface of the speaker 1 is disposed opposite to the sound outlet 5, and a sealed space between an inner wall of the first housing 2 and the front end surface of the speaker forms the front sound cavity 6; the back sound cavity comprises a first back sound cavity and a second back sound cavity, a first concave cavity 7 and a second concave cavity 8 are formed in the inner wall of the first shell 2, the first concave cavity 7 is opposite to the first through hole, the area of the first through hole is larger than that of the front end face of the loudspeaker 1, the second concave cavity 8 is opposite to a blank PCB (printed circuit board) around the loudspeaker 1, a third concave cavity 9 is formed in the inner wall of the second shell 3, the back end face of the loudspeaker 1, the first concave cavity 7, the third concave cavity 9 and the PCB are surrounded to form the first back sound cavity, the second concave cavity 8, the PCB 4 are surrounded to form the second back sound cavity, and a second through hole 10 used for communicating the first back sound cavity with the second back sound cavity is formed in the blank PCB.
The area of the sound outlet 5 has a certain influence on sound production of the sound cavity structure, the position and the area of the opening of the sound outlet 5 have a certain relation with the front sound cavity 6, the larger the front sound cavity 6 is, the smaller the influence degree of the position of the sound outlet 5 and the area of the sound outlet 5 on sound is, the position of the sound outlet 5 and the area of the sound outlet 5 need to be specifically set in combination with the front sound cavity 6, the number of the sound outlet 5 is multiple, and the position of the sound outlet 5 and the number of the area of the sound outlet 5 are not particularly limited.
In the embodiment of the present invention, the rear end surface of the speaker 1, the first cavity 7, the third cavity 9, and the PCB 4 are enclosed to form the first back sound cavity, and in order to ensure the tightness of the first back sound cavity, the position on the PCB 4 where the hole needs to be opened due to the structural requirement needs to be sealed by adding a corresponding cavity on the first casing 2 or the second casing 3.
According to the invention, the blank PCB around the loudspeaker 1 is fully utilized, the second through holes 10 are arranged on the blank PCB and communicated with the second concave cavity 8, so that the volume of the second back sound cavity is increased, the sound quality of the low-frequency part emitted by the loudspeaker is further improved, the whole sound quality of the loudspeaker 1 is more pleasant, and the number of the second through holes 10 can be formed according to the actual situation of the blank PCB around the loudspeaker 1 in a specific embodiment because the PCB around the loudspeaker 1 can be scattered. The number of the second through holes 10 is not particularly limited in this embodiment, and the number of the second through holes 10 may be one or more according to practical situations. The volume of the second cavity 8 and the area of the second through hole 10 in the present invention can be appropriately adjusted according to the need, and when the volume of the second cavity 8 is relatively large, the area of the second through hole 10 can be relatively reduced, and when the volume of the second cavity 8 is relatively small, the area of the second through hole 10 can be relatively increased. The volume of the second cavity 8 and the area of the second through hole 10 are not particularly limited in the present invention.
In the invention, the sealing of the front sound cavity and the rear sound cavity can be realized by foam, adhesive and other materials, and the sealing materials of the front sound cavity and the rear sound cavity are not particularly limited in the embodiment.
According to the sound cavity structure provided by the invention, the area of the first through hole is larger than that of the front end face of the loudspeaker, the volume of the first back sound cavity is increased, the total volume of the back sound cavity is increased through arranging the second back sound cavity and the second through hole communicated with the first back sound cavity and the second back sound cavity, the back sound cavity influences the sound quality of the ringtone and the low-frequency part of the earphone sound production, and the sound cavity structure provided by the invention ensures that the sound quality of the low-frequency part of the loudspeaker is better improved, and a user can feel more pleasant in the subjective sense of the loudspeaker sound production.
Example two
Referring to fig. 2-4, the sound cavity structure of the present embodiment is applied to a mobile phone, where the mobile phone includes a speaker 1, a first housing 2, a second housing 3, and a PCB board 4, where the PCB board 4 is disposed in a space formed by surrounding the first housing 2 and the second housing 3, a first through hole through which the speaker passes is formed on the PCB board 4, the sound cavity structure includes a front sound cavity and a rear sound cavity, a sound outlet 5 of the speaker is formed on the first housing 2, a front end surface of the speaker 1 is disposed opposite to the sound outlet 5, and a sealed space between an inner wall of the first housing 2 and a front end surface of the speaker 1 forms the front sound cavity 6; the back sound cavity comprises a first back sound cavity and a second back sound cavity, a first concave cavity 7 and a second concave cavity 8 are formed in the inner wall of the first shell 2, the first concave cavity 7 is opposite to the first through hole, the area of the first through hole is larger than that of the front end face of the loudspeaker 1, the second concave cavity 8 is opposite to the blank PCB around the loudspeaker 1, a third concave cavity 9 is formed in the inner wall of the second shell 3, the back end face of the loudspeaker 1, the first concave cavity 7, the third concave cavity 9 and the PCB 4 are surrounded to form the first back sound cavity, the second concave cavity 8, the PCB 4 are surrounded to form the second back sound cavity, and a second through hole 10 used for communicating the first back sound cavity with the second back sound cavity is formed in the blank PCB.
The area of the sound outlet 5 has a certain influence on sound production of the sound cavity structure, the position and the area of the opening of the sound outlet 5 have a certain relation with the front sound cavity 6, the larger the front sound cavity 6 is, the smaller the influence degree of the position of the sound outlet 5 and the area of the sound outlet 5 on sound is, the position of the sound outlet 5 and the area of the sound outlet 5 need to be specifically set in combination with the front sound cavity 6, the number of the sound outlet 5 is multiple, and the position of the sound outlet 5, the area of the sound outlet 5 and the number of the sound outlet 5 are not particularly limited in this embodiment.
In this embodiment, the first cavity 7 on the first housing 2 is disposed opposite to the horn 1, and the bottom area of the first cavity 7 is larger than the area of the first through hole. According to the embodiment, the bottom area of the first concave cavity 7 is enlarged, the volume of the back sound cavity is relatively enlarged, the volume reserved for the back sound cavity is correspondingly reduced under the trend that the intelligent mobile phone shows thinner and thinner, the back sound cavity mainly affects the low-frequency part of the mobile phone bell, the low-frequency part of the bell has a great influence on sound quality, the volume of the first back sound cavity is further enlarged by enlarging the bottom area of the first concave cavity 7, and the sound quality of the low-frequency part of the loudspeaker 1 can be effectively improved.
According to the invention, the number of the second through holes 10 is one or more, the blank PCB 4 around the loudspeaker 1 is fully utilized, the second through holes 10 are arranged on the blank PCB 4 to be communicated with the second concave cavity 8, so that the volume of the second rear sound cavity is increased, the tone quality of a low-frequency part emitted by the loudspeaker 1 is further improved, and the second through holes 10 can be arranged in a dispersed manner according to the actual situation because the PCB 4 around the loudspeaker 1 is likely to be dispersed, and when the PCB 4 around the loudspeaker 1 is arranged in a dispersed manner, the second through holes 10 are arranged in a plurality according to the dispersion degree of the PCB 4 around the blank part, and the plurality comprises two or more than two. When the PCB 4 in the blank area around the speaker 1 is a concentrated blank area, one second through hole 10 is provided. The volume of the second cavity 8 and the area of the second through hole 10 in the present invention can be appropriately adjusted according to the need, and when the volume of the second cavity 8 is relatively large, the area of the second through hole 10 can be relatively reduced, and when the volume of the second cavity 8 is relatively small, the area of the second through hole 10 can be relatively increased. The volume of the second cavity 8 and the area of the second through hole 10 are not particularly limited in the present invention.
In the embodiment of the present invention, the rear end surface of the speaker 1, the first cavity 7, the third cavity 9, and the PCB 4 are enclosed to form the first back sound cavity, and in order to ensure the tightness of the first back sound cavity, the position on the PCB 4 where the hole needs to be opened due to the structural requirement needs to be sealed by adding a corresponding cavity on the first casing 2 or the second casing 3.
In this embodiment, the upper end surface of the first cavity 7 is sealed with the PCB 4 by a first foam seal 11. The upper end face of the second concave cavity 8 is sealed with the PCB 4 through a second foam pad 12, and the embodiment seals the sound cavity by foam pad, so that the cost is reduced. In other embodiments, the sealing between the upper end surface of the first cavity 7 and the PCB 4 may be made of other materials that can achieve the sealing effect, and similarly, the sealing between the upper end surface of the second cavity 8 and the PCB 4 may be made of other materials that can achieve the sealing effect, which is not particularly limited in this embodiment.
Further, in this embodiment, a speaker bracket 13 is further disposed on the first housing 2, the speaker 1 is disposed on the speaker bracket 13, and in this embodiment, the speaker 1 is disposed in a cavity of the speaker bracket 13. The horn support 13 is sealed with the first housing 2 by a third foam 14. In other embodiments, the sealing between the horn support 13 and the first housing 2 may be made of other materials that can perform a sealing effect, and the embodiment is not particularly limited. In this embodiment, a fourth foam 15 is used to seal the third cavity 9 and the PCB 4.
In this embodiment, a dust screen (not visible in the figure) is disposed on the front end face of the horn 1, and the dust screen can effectively prevent dust from invading into the horn 1, so as to improve the service life of the horn 1.
According to the sound cavity structure provided by the invention, the area of the first through hole is larger than that of the front end face of the loudspeaker, the volume of the first back sound cavity is increased, the total volume of the back sound cavity is increased through arranging the second back sound cavity and the second through hole communicated with the first back sound cavity and the second back sound cavity, the back sound cavity influences the sound quality of the ringtone and the low-frequency part of the earphone sound production, and the sound cavity structure provided by the invention ensures that the sound quality of the low-frequency part of the loudspeaker is better improved, and a user can feel more pleasant in the subjective sense of the loudspeaker sound production.
Example III
The embodiment provides a mobile phone, the mobile phone includes first casing, second casing and sets up PCB board and loudspeaker in the casing space that first casing and second casing formed, set up on the PCB board and supply the loudspeaker passes first through-hole, still be provided with in the casing space foretell sound cavity structure.
The sound cavity structure comprises a front sound cavity and a rear sound cavity, the first shell is provided with a sound outlet hole of the loudspeaker, the front end face of the loudspeaker is arranged opposite to the sound outlet hole, and a sealing space between the inner wall of the first shell and the front end face of the loudspeaker forms the front sound cavity; the back sound cavity comprises a first back sound cavity and a second back sound cavity, a first concave cavity and a second concave cavity are formed in the inner wall of the first shell, the first concave cavity is arranged opposite to the first through hole, the area of the first through hole is larger than that of the front end face of the loudspeaker, the second concave cavity is arranged opposite to a blank PCB around the loudspeaker, a third concave cavity is formed in the inner wall of the second shell, the back end face of the loudspeaker, the first concave cavity, the third concave cavity and the PCB enclose the first back sound cavity, the second concave cavity, the PCB enclose the second back sound cavity, and a second through hole used for communicating the first back sound cavity and the second back sound cavity is formed in the blank PCB.
The area of the sound outlet has a certain influence on sound production of the sound cavity structure, the position and the area of the sound outlet have a certain relation with the front sound cavity, the larger the front sound cavity is, the smaller the influence degree of the position and the area of the sound outlet on sound is, the position and the area of the sound outlet need to be specifically set in combination with the specific front sound cavity, the position, the area and the number of the sound outlet are not particularly limited in the embodiment,
in the embodiment of the invention, the number of the second through holes can be set according to the actual situation of the blank PCB around the loudspeaker, and the number of the second through holes is not particularly limited in the embodiment, and can be one or more according to the actual situation. In this embodiment, the volume of the second cavity and the area of the second through hole may be appropriately adjusted according to the need, when the volume of the second cavity is relatively large, the area of the second through hole may be relatively reduced, and when the volume of the second cavity is relatively small, the area of the second through hole may be relatively increased.
In the embodiment of the invention, the rear end face of the loudspeaker, the first concave cavity, the third concave cavity and the PCB are surrounded to form the first rear sound cavity, and in order to ensure the tightness of the first rear sound cavity, the position of the PCB, which needs to be provided with a hole due to the structural requirement, is required to be sealed by adding a corresponding concave cavity on the second shell.
In the invention, the sealing of the front sound cavity and the rear sound cavity can be realized by foam, adhesive and other materials, and the sealing materials of the front sound cavity and the rear sound cavity are not particularly limited in the embodiment.
The mobile phone provided by the invention comprises a first shell, a second shell, a PC board and a loudspeaker, wherein the PC board and the loudspeaker are arranged in a shell space formed by the first shell and the second shell, a first through hole for the loudspeaker to pass through is formed in the PC board, and the sound cavity structure is further arranged in the shell space.
Example IV
The embodiment provides a mobile phone, the mobile phone includes first casing, second casing and sets up PCB board and loudspeaker in the casing space that first casing and second casing formed, set up on the PCB board and supply the loudspeaker passes first through-hole, still be provided with in the casing space foretell sound cavity structure.
The sound cavity structure comprises a front sound cavity and a rear sound cavity, the first shell is provided with a sound outlet hole of the loudspeaker, the front end face of the loudspeaker is arranged opposite to the sound outlet hole, and a sealing space between the inner wall of the first shell and the front end face of the loudspeaker forms the front sound cavity; the back sound cavity comprises a first back sound cavity and a second back sound cavity, a first concave cavity and a second concave cavity are formed in the inner wall of the first shell, the first concave cavity is arranged opposite to the first through hole, the area of the first through hole is larger than that of the front end face of the loudspeaker, the second concave cavity is arranged opposite to a blank PCB around the loudspeaker, a third concave cavity is formed in the inner wall of the second shell, the back end face of the loudspeaker, the first concave cavity, the third concave cavity and the PCB enclose the first back sound cavity, the second concave cavity, the PCB enclose the second back sound cavity, and a second through hole used for communicating the first back sound cavity and the second back sound cavity is formed in the blank PCB.
Further, the first casing is a front casing of the mobile phone, the second casing is a rear casing of the mobile phone, in this embodiment, the first casing is a front casing of the mobile phone, the second casing is a rear casing of the mobile phone, and the first casing is provided with a sound outlet hole of the loudspeaker, that is, the sound outlet hole of the embodiment is arranged on the front casing of the mobile phone. In other embodiments, when the first housing is a rear housing of the mobile phone and the second housing is a front housing of the mobile phone, the sound outlet is disposed on the rear housing of the back of the mobile phone due to the sound outlet being disposed on the first housing.
The area of the first through hole in the sound cavity structure of the mobile phone is larger than the area of the front end face of the loudspeaker, the volume of the first back sound cavity is increased, the total volume of the back sound cavity is increased by arranging the second back sound cavity and the second through hole communicated with the first back sound cavity and the second back sound cavity, the sound quality of the low-frequency part of the mobile phone bell and the sound of the receiver is well improved, and a user can feel more pleasant in subjective sound production of the mobile phone bell and the receiver.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. The utility model provides a sound chamber structure, is applied to the cell-phone, the cell-phone includes loudspeaker, first casing, second casing and printed circuit board, the printed circuit board sets up first casing with in the space that forms is enclosed to the second casing, set up on the printed circuit board and supply loudspeaker pass its characterized in that through-hole:
the sound cavity structure comprises a front sound cavity and a rear sound cavity, sound outlet holes of the loudspeaker are formed in the first shell, the number of the sound outlet holes is multiple, the front end face of the loudspeaker is arranged opposite to the sound outlet holes, and a sealing space between the inner wall of the first shell and the front end face of the loudspeaker forms the front sound cavity;
the back sound cavity comprises a first back sound cavity and a second back sound cavity, a first concave cavity and a second concave cavity are formed in the inner wall of the first shell, the first concave cavity is arranged opposite to the first through hole, the area of the first through hole is larger than that of the front end face of the loudspeaker, the second concave cavity is arranged opposite to a blank printed circuit board around the loudspeaker, a third concave cavity is formed in the inner wall of the second shell, the back end face of the loudspeaker, the first concave cavity, the third concave cavity and the printed circuit board are surrounded to form the first back sound cavity, the second concave cavity, the printed circuit board is surrounded to form the second back sound cavity, and a second through hole used for communicating the first back sound cavity and the second back sound cavity is formed in the blank printed circuit board.
2. The acoustic cavity structure of claim 1, wherein: the first concave cavity is opposite to the loudspeaker, and the bottom area of the first concave cavity is larger than the area of the first through hole.
3. The acoustic cavity structure according to claim 1 or 2, characterized in that: the number of the second through holes is one or more.
4. The acoustic cavity structure of claim 1, wherein: the upper end face of the first concave cavity is sealed with the printed circuit board through a first foam seal.
5. The acoustic cavity structure of claim 1, wherein: the upper end face of the second concave cavity is sealed with the printed circuit board through a second foam pad.
6. The acoustic cavity structure of claim 1, wherein: the first shell is also provided with a loudspeaker support, and the loudspeaker is arranged on the loudspeaker support.
7. The acoustic cavity structure of claim 6, wherein: the horn support is sealed with the first shell through a third foam.
8. The acoustic cavity structure of claim 6, wherein: a dustproof net is arranged on the front end face of the loudspeaker.
9. A mobile phone, characterized in that: the loudspeaker comprises a first shell, a second shell, a printed circuit board and a loudspeaker, wherein the printed circuit board and the loudspeaker are arranged in a shell space formed by the first shell and the second shell, a first through hole for the loudspeaker to pass through is formed in the printed circuit board, and the sound cavity structure as claimed in any one of claims 1-8 is further arranged in the shell space.
10. The mobile phone of claim 9, wherein: the first shell is a front shell of the mobile phone, the second shell is a rear shell of the mobile phone, or the first shell is a rear shell of the mobile phone, and the second shell is a front shell of the mobile phone.
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| CN108882124B (en) * | 2018-06-29 | 2021-02-19 | 维沃移动通信有限公司 | Electronic equipment |
| CN112165542A (en) * | 2020-09-07 | 2021-01-01 | Oppo广东移动通信有限公司 | Sound outputting assembly and electronic equipment thereof |
| CN112261187B (en) * | 2020-10-23 | 2022-04-12 | 维沃移动通信有限公司 | Electronic device |
| CN112615950B (en) * | 2020-12-18 | 2023-06-30 | 维沃移动通信有限公司 | Electronic equipment |
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| TWM435792U (en) * | 2012-03-09 | 2012-08-11 | Weis Design Co Ltd | Handheld Loudspeaker device |
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