CN210093435U

CN210093435U - Loudspeaker box

Info

Publication number: CN210093435U
Application number: CN201921031355.1U
Authority: CN
Inventors: 任莉; 吴军
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2019-06-29
Filing date: 2019-07-02
Publication date: 2020-02-18
Anticipated expiration: 2029-07-02
Also published as: WO2021000105A1

Abstract

The utility model provides a loudspeaker box. Loudspeaker box, including the epitheca, with epitheca cooperation forms accommodating space's inferior valve and accept in sound production monomer in the accommodating space, sound production monomer will accommodating space separates into antetheca and back chamber, the epitheca includes the roof, certainly the roof court the support wall that inferior valve direction extends and run through the roof form with the through-hole of preceding sound chamber intercommunication, support the wall encircleing the through-hole sets up, the roof is kept away from the sunken depressed part that is formed with in free one side of sound production, the depressed part has the orientation the roof is kept away from the opening of sound production monomer one side, loudspeaker box still including sealed and lid is located the through-hole reaches open-ended metal insert, the depressed part with form the resonant cavity between the metal insert, the resonant cavity with antetheca intercommunication. Compared with the prior art, the utility model provides a speaker box can effectively reduce high frequency resonance peak value and sensitivity, improves the acoustic performance.

Description

Loudspeaker box

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electroacoustic conversion technology field especially relates to a loudspeaker box.

[ background of the invention ]

With the rapid development of mobile communication technology in recent years, consumers increasingly use mobile communication devices with voice functions, such as: portable telephones, handheld game devices, portable computers, and the like. The loudspeaker box is used as a voice playing device, and the design of the loudspeaker box directly influences the voice performance of a mobile communication equipment product. In order to meet the market demand for a thinner and higher sound quality, a higher demand is placed on the design of the speaker box.

In the related art, the loudspeaker box comprises an upper shell, a lower shell and a sound production unit, wherein the sound production unit comprises a vibrating diaphragm, the vibrating diaphragm and the upper shell form a front sound cavity at an interval, a sound guide channel is formed on the side wall of the upper shell, and the front sound cavity and the sound guide channel form a front cavity; with the popularization of the application of stereo sound at the mobile phone end, the loudspeaker does not pursue too high frequency response any more, and the too high frequency response (especially 4000Hz to 6000Hz) can cause the problems of sound quality poor such as harsh sound and sharp lip and tooth sound.

Therefore, there is a need to provide a new speaker box to solve the above-mentioned drawbacks.

[ Utility model ] content

The utility model aims at overcoming above-mentioned technical problem, provide a speaker box that can effectively reduce the high frequency resonance peak value and the sensitivity of speaker box.

In order to achieve the above object, the present invention provides a speaker box, comprising an upper shell, a lower shell forming a containing space in cooperation with the upper shell, and a sound generating unit contained in the containing space, wherein the sound generating unit separates the containing space into a front cavity and a rear cavity, the sound generating unit comprises a vibrating diaphragm for vibrating sound generation, the vibrating diaphragm and the upper shell are arranged at intervals to form a front sound cavity, the upper shell is formed with a sound guiding channel communicating the front sound cavity with the outside, the sound guiding channel and the front sound cavity jointly form the front cavity of the speaker box, the upper shell comprises a top wall right facing the vibrating diaphragm, a supporting wall extending from the top wall towards the lower shell direction, and a through hole penetrating the top wall to form a through hole communicating with the front sound cavity, the supporting wall surrounds the through hole, one side of the top wall far away from the sound generating unit is concavely formed with a concave part, the depressed part has the orientation the roof is kept away from the opening of sound production monomer one side, the speaker box is still including sealed and lid locate the through-hole reaches open-ended metal insert, the depressed part with form the resonant cavity between the metal insert, the resonant cavity with the ante-chamber intercommunication.

Preferably, the speaker box further comprises a leakage hole formed in the metal insert, and the resonant cavity is communicated with external sound pressure through the leakage hole.

Preferably, the speaker box comprises a breathable isolating piece which is fixed on the metal insert and covers the leakage hole, and one side of the metal insert, which is far away from the sounding monomer, is sunken to form a groove for accommodating the breathable isolating piece.

Preferably, the recess includes a first surrounding wall extending from the top wall to the lower shell and a second surrounding wall extending from the first surrounding wall to the support wall, and the support wall, the first surrounding wall and the second surrounding wall together form the recess.

Preferably, a notch is formed in the supporting wall corresponding to the recessed portion in a penetrating manner, and the notch communicates with the resonant cavity and the front acoustic cavity.

Preferably, the resonant cavity and the sound guide channel are respectively arranged on two opposite sides of the sound generating unit.

Preferably, the sound-emitting element and the supporting wall are adhesively fixed.

Preferably, the metal insert is a steel sheet and is fixedly arranged on the top wall through injection molding, and the orthographic projection of the metal insert towards the lower shell simultaneously falls into the sound guide channel and the front sound cavity.

Preferably, the top wall, the first enclosing wall, the second enclosing wall and the support wall are integrally formed.

Preferably, the upper shell and the lower shell are ultrasonically sealed.

Compared with the prior art, the utility model provides a loudspeaker box, at first, through setting up the resonant cavity that communicates with front chamber, increase an extra cavity space on the basis of former front chamber equivalently, can obtain the effect of different frequency response curves through changing the size of breach, improve the high-frequency sense of hearing; secondly, the supporting wall, the first surrounding wall and the second surrounding wall which surround the resonant cavity are all contained in the containing space of the loudspeaker box, the height space of the loudspeaker box is not occupied, and the light and thin design requirement of the loudspeaker box can be met; finally, the effect of different frequency response curves can be obtained by adjusting the mesh number of the ventilating partition, the Q value (quality factor value) and the sensitivity of the high-frequency formant of the loudspeaker box are effectively reduced, and the high-frequency hearing sense is improved.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:

fig. 1 is a schematic perspective view of a speaker box according to the present invention;

FIG. 2 is an exploded view of the speaker cabinet of FIG. 1;

FIG. 3 is another schematic structural view of the upper shell shown in FIG. 2;

fig. 4 is a cross-sectional view of the loudspeaker enclosure shown in fig. 1, taken along the line IV-IV.

[ detailed description ] embodiments

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 to 4, fig. 1 is a schematic perspective view of a speaker box according to the present invention; FIG. 2 is an exploded view of the speaker cabinet of FIG. 1; FIG. 3 is another schematic structural view of the upper shell shown in FIG. 2; fig. 4 is a cross-sectional view of the loudspeaker enclosure shown in fig. 1, taken along the line IV-IV. The utility model provides a loudspeaker box 100, loudspeaker box 100 includes epitheca 1, inferior valve 2, has the sound production monomer 3 of vibrating diaphragm 31, reveals structure 4, resonant cavity 10, preceding acoustic cavity 20, sound conduction passageway 30, front chamber 40 and back chamber 50.

The upper case 1 and the lower case 2 are ultrasonically sealed. The upper shell 1 is used for bearing and protecting the sounding monomer 3, the lower shell 2 is covered on the upper shell 1 and matched with the upper shell 1 to form an accommodating space, the sounding monomer 3 is accommodated in the accommodating space, and the sounding monomer 3 separates the accommodating space into the front cavity 40 and the rear cavity 50. The vibrating diaphragm 31 is used for vibrating and sounding, the upper casing 1 and the vibrating diaphragm 31 are arranged at intervals to form the front sound cavity 20, the sound guide channel 30 is formed in the upper casing 1 and communicated with the front sound cavity 20 and the outside, and the front sound cavity 20 and the sound guide channel 30 jointly form the front cavity 40 and are used for conducting sound to the outside. The upper shell 1, the lower shell 2 and the diaphragm 31 cooperate to form the back cavity 50.

The upper shell 1 comprises a top wall 11 arranged opposite to the diaphragm 31, a through hole 111 penetrating through the top wall 11 and communicated with the front sound cavity 20, a support wall 12 extending from the top wall 11 to the lower shell 2, a concave part 13 formed by sinking one side of the top wall 11 far away from the sound generating unit 3, and a metal insert 14. The depressed part 13 has an opening 133 facing the top wall 11 and far away from the sounding unit 3, the metal insert 14 is sealed and disposed in the through hole 111 and the opening 133, the resonant cavity 10 is formed between the depressed part 13 and the metal insert 14, and the resonant cavity 10 is communicated with the front cavity 40

Specifically, the recessed portion 13 includes a first surrounding wall 131 formed by extending from the top wall 11 to the lower case 2 and a second surrounding wall 132 formed by extending from the first surrounding wall 131 to the supporting wall 12, the first surrounding wall 131 and the second surrounding wall 132 are connected to the outside of the supporting wall 11, and the supporting wall 12, the first surrounding wall 131 and the second surrounding wall 132 surround the recessed portion 13. Preferably, the top wall 11, the supporting wall 12, the first surrounding wall 131 and the second surrounding wall 132 are integrally formed, so that the supporting wall 12, the first surrounding wall 131 and the second surrounding wall 132 are all accommodated in the accommodating space of the speaker box 100, the height space of the speaker box 100 is not occupied, and the design requirement of thinning the speaker box can be met.

The support wall 12 is disposed around the through hole 111. The supporting wall 12 is used for fixedly connecting the sounding single body 3 and the supporting wall 12 are fixed in an adhesive manner, so that the sounding single body 3 and the supporting wall 12 form a firm connecting structure.

A notch 121 is formed through the support wall 12 at a position corresponding to the recessed portion 13, and the resonant cavity 10 is communicated with the front cavity 40 through the notch 121. Specifically, the resonant cavity 10 is communicated with the front sound cavity 20 through the notch 121, and the resonant cavity 10 and the sound guide channel 30 are respectively disposed on two opposite sides of the sound generating unit 3.

The position that the support wall 12 corresponds to the sound conduction channel 30 is provided with sound conduction hole 122, sound conduction hole 122 intercommunication preceding sound chamber 20 with sound conduction channel 30, breach 121 with sound conduction hole 122 set up in the relative both sides of sound production monomer 3, and further, resonant cavity 10 with sound conduction channel 30 set up respectively in the relative both sides of sound production monomer 3. Such a structure is equivalent to adding an extra cavity space (the resonant cavity 10) on the basis of the front cavity 40, and the effect of different frequency response curves can be obtained by changing the size of the notch 121, so that the Q value (quality factor value) and the sensitivity of the high-frequency formant of the loudspeaker box 100 can be effectively reduced, and the high-frequency listening feeling can be improved.

The metal insert 14 is a steel sheet, the metal insert 14 is fixed to the top wall 11 through injection molding, and the orthographic projection of the metal insert 14 to the lower shell 2 direction falls into the sound guide channel 30 and the front sound cavity 20 simultaneously. I.e. the metal insert 14 is facing the junction of the sound guiding channel 30 and the front sound cavity 20. The metal insert 14 is harder than the top wall 11, i.e. the young's modulus of the metal insert 14 is greater than that of the top wall 11, which can be used to reduce harmonic spike distortion of the front cavity 40 of the loudspeaker enclosure 100 and improve its acoustic performance.

In addition, since the thickness of the metal insert 14 is much smaller than the thickness of the top wall 11, a part of the upper case 1 is replaced with the metal insert 14. The metal insert 14 disposed opposite to the connection between the sound guide channel 30 and the front sound cavity 20 (i.e., opposite to the sound guide hole 122) greatly increases the sound emitting height of the sound guide channel 30, and this structure is favorable for smooth sound airflow of the front cavity 40, thereby effectively improving the acoustic performance and listening feeling of the speaker box 100.

The leakage structure 4 is used for balancing the sound pressure of the resonant cavity 10 with the external sound pressure, and in this embodiment, the leakage structure 4 is disposed on the metal insert 14. Specifically, the leakage structure 4 includes a leakage hole 41 and a ventilation spacer 42, a groove 141 for accommodating the ventilation spacer 42 is formed in an outer surface of the metal insert 14, the leakage hole 41 is formed in a bottom of the groove 141 of the metal insert 14 and penetrates through the metal insert 14, and the leakage hole 41 communicates the resonant cavity 10 and the external sound pressure.

The above embodiments of the present invention are only described, and it should be noted that, for those skilled in the art, modifications can be made without departing from the inventive concept, but these all fall into the protection scope of the present invention.

Claims

1. A loudspeaker box comprises an upper shell, a lower shell and a sound production monomer, wherein the lower shell is matched with the upper shell to form an accommodating space, the sound production monomer is accommodated in the accommodating space, the sound production monomer divides the accommodating space into a front cavity and a rear cavity, the sound production monomer comprises a vibrating diaphragm used for vibration sound production, the vibrating diaphragm and the upper shell are arranged at intervals to form a front sound cavity, the upper shell is provided with a sound guide channel communicated with the front sound cavity and the outside, the sound guide channel and the front sound cavity jointly form the front cavity of the loudspeaker box, the loudspeaker box is characterized in that the upper shell comprises a top wall, a support wall and a through hole, the top wall is arranged right opposite to the vibrating diaphragm, the support wall extends towards the lower shell, the top wall penetrates through the through hole communicated with the front sound cavity, the support wall surrounds the through hole, one side of the sound production monomer is sunken to form a sunken part, and the sunken part has an opening facing towards one side of the top wall away from the, the loudspeaker box further comprises a metal insert which is sealed and covered on the through hole and the opening, a resonant cavity is formed between the concave part and the metal insert, and the resonant cavity is communicated with the front cavity.

2. The speaker cabinet of claim 1, further comprising a leak opening in the metal insert, the leak opening communicating the resonant cavity with ambient sound pressure.

3. The speaker box of claim 2, wherein the speaker box includes a breathable spacer fixed to the metal insert and covering the leakage hole, and a side of the metal insert away from the sound-generating unit is recessed to form a groove for accommodating the breathable spacer.

4. A loudspeaker enclosure according to claim 1, wherein the recess comprises a first wall extending from the top wall toward the lower enclosure and a second wall extending from the first wall toward the support wall, the first wall and the second wall together defining the recess.

5. The speaker box as claimed in claim 4, wherein the supporting wall has a gap corresponding to the recess, and the gap communicates the resonant cavity and the front acoustic cavity.

6. A loudspeaker enclosure according to claim 4, wherein the resonant cavity and the sound conduction channel are disposed on opposite sides of the sound generating unit.

7. A loudspeaker enclosure according to claim 1, wherein the sound-generating unit and the supporting wall are adhesively secured.

8. The loudspeaker enclosure of claim 1, wherein the metal insert is a steel sheet and is fixedly attached to the top wall by injection molding, and an orthographic projection of the metal insert in the direction of the lower enclosure falls into the sound guide channel and the front sound cavity simultaneously.

9. A loudspeaker enclosure according to claim 5, wherein the top wall, the first enclosure wall, the second enclosure wall and the support wall are integrally formed.

10. A loudspeaker enclosure according to claim 1, wherein the upper and lower shells are ultrasonically sealed.