CN210093483U

CN210093483U - Loudspeaker box

Info

Publication number: CN210093483U
Application number: CN201921031353.2U
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: WO2021000106A1

Abstract

The utility model provides a loudspeaker box, its include the epitheca, with the 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 include with relative roof that sets up of vibrating diaphragm, run through the through-hole and the complete lid that the roof set up are located the steel sheet of through-hole, loudspeaker box still include certainly the steel sheet to the sunken depressed part and the apron that form of accommodating space direction, the apron cooperation the depressed part forms the resonant cavity, the resonant cavity with the antetheca intercommunication. Compared with the prior art, the utility model provides a speaker box acoustic performance is better. Compared with the prior art, the utility model provides a speaker box acoustic performance is better.

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 an accommodating space in cooperation with the upper shell, and a sound generating unit accommodated in the accommodating space, wherein the sound generating unit separates the accommodating space into a front cavity and a rear cavity, the sound generating unit comprises a vibrating diaphragm for generating sound by vibration, 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 guide channel communicating the front sound cavity with the outside, the sound guide channel and the front sound cavity jointly form the front cavity, the upper shell comprises a top wall arranged opposite to the vibrating diaphragm, a through hole penetrating the top wall, and a steel sheet covering the through hole, the speaker box further comprises a depressed part formed by depression of the steel sheet in the direction of the accommodating space, and a cover plate covering the depressed part, the cover plate cooperates with the depressed part to form a resonant cavity, the resonant cavity is communicated with the front cavity.

Preferably, the through hole and the resonant cavity are respectively communicated with the front sound cavity, the recessed part is provided with a first through hole communicated with the front cavity in a penetrating manner, one side of the recessed part, which is far away from the sound production monomer, is surrounded into a second through hole communicated with the outside, and the cover plate is arranged on the second through hole and fixed with the recessed part.

Preferably, the epitheca still includes certainly the roof is close to one side of sound production monomer to the inferior valve direction extends and forms and encircles the support wall that the through-hole set up and certainly the roof is close to one side of sound production monomer to the wall is acceptd that the inferior valve extends the formation, the support wall is used for fixing the sound production monomer, it is located to accept the wall the support wall is kept away from one side of sound production monomer and is encircleed the resonant cavity setting.

Preferably, a notch is formed in the supporting wall corresponding to the first through opening, and the notch is communicated with the first through opening.

Preferably, the resonant cavity is communicated with the front sound cavity through the first through hole and the notch.

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

Preferably, the top wall, the accommodating wall and the supporting wall are integrally formed, and the steel sheet is fixed on the outer side surface of the top wall through injection molding.

Preferably, the orthographic projection of the steel sheet to the lower shell direction falls into the sound guide channel and the front sound cavity simultaneously.

Preferably, the upper shell and the lower shell are fixed by ultrasonic sealing.

Preferably, the cover plate is a PET film.

Compared with the prior art, the utility model provides a loudspeaker box through set up on the steel sheet with the resonant cavity of preceding sound chamber intercommunication, the diversion increases the cavity volume of preceding chamber on the one hand, improves high frequency acoustic performance, and on the other hand is through changing the breach with the trompil size of first opening can obtain the curved effect of different frequency response, effectively reduces the Q value (quality factor value) and the sensitivity of the high frequency formant of loudspeaker box improve high frequency hearing, make loudspeaker box's acoustic performance is more excellent.

[ 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 perspective view of a certain viewing angle of the speaker box provided by the present invention;

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

FIG. 3 is an enlarged view of the steel sheet of FIG. 3;

fig. 4 is a perspective view of another perspective view of the speaker box provided by the present invention;

fig. 5 is a cross-sectional view taken along line V-V of fig. 4.

[ 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. 1-5, fig. 1 is a perspective view of a certain viewing angle of the speaker box according to the present invention; FIG. 2 is an exploded view of the speaker cabinet of FIG. 1; FIG. 3 is an enlarged view of the steel sheet of FIG. 3; fig. 4 is a perspective view of another perspective view of the speaker box provided by the present invention; fig. 5 is a cross-sectional view taken along line V-V of fig. 4. The utility model provides a loudspeaker box 100, including epitheca 1, inferior valve 2, the sound production monomer 3 that has vibrating diaphragm 31, apron 4, resonant cavity 10, preceding sound chamber 20, leading sound passageway 30, preceding chamber 40 and back chamber 50.

The upper shell 1 and the lower shell 2 are fixed through ultrasonic sealing. The upper shell 1 is used for bearing and protecting the sound-generating monomer 3, the lower shell 2 is arranged on the upper shell 1 in a covering mode and matched with the upper shell 1 to form an accommodating space, and the sound-generating monomer 3 is accommodated in the accommodating space and divides the accommodating space into the front cavity 40 and the rear cavity 50. Diaphragm 31 is used for the vibration sound production, epitheca 1 with diaphragm 31 interval sets up the formation preceding sound chamber 20, sound guide channel 30 shaping in epitheca 1, and communicate preceding sound chamber 20 and external world, preceding sound chamber 20 with sound guide channel 30 constitutes jointly preceding chamber 40 for conduct sound to external world, epitheca 1 inferior valve 2 reaches the cooperation of diaphragm 31 forms back chamber 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 steel sheet 12 completely covering the through hole 111, a supporting wall 13 extending from the top wall 11 to the sound-generating unit 3 in the direction of the lower shell 2 and surrounding the through hole 111, and an accommodating wall 14 extending from the inner side of the top wall 11 to the lower shell 2, wherein the top wall 11, the accommodating wall 14 and the supporting wall 13 are integrally formed, the steel sheet 12 is fixed on the outer side surface of the top wall 11 through injection molding, and the steel sheet 12 is flush with the top wall 11, so that the structure does not occupy the height space of the loudspeaker box 100, and the light and thin design requirement of the loudspeaker box 100 is favorably met.

The steel sheet 12 is fixedly arranged on the outer side surface of the top wall 11 through injection molding, the steel sheet 12 is provided with a recessed portion 121 formed by extending towards the direction of the lower shell 2 in a recessed manner, the recessed portion 121 penetrates through a first through opening 1211 communicated with the front cavity 40 and one side, away from the sound generating unit 3, of the recessed portion 121 to form a second through opening 1212 communicated with the outside, the cover plate 4 is arranged on the second through opening 1212 and is fixed to the recessed portion 121 in a sealing manner, the cover plate 4 and the recessed portion 121 are matched to form a resonant cavity 10 together, the resonant cavity 10 is arranged on the outer side of the supporting wall 13, and the resonant cavity 10 and the front cavity 40 are communicated with each other to form a resonant structure of the resonant cavity 10 and the front cavity 40. Specifically, a notch 131 penetrating through the support wall 13 is disposed on one side of the support wall 13 close to the recess 121, the first port 1211 is disposed corresponding to the position of the notch 131, the notch 131 is communicated with the first port 1211, and further, the resonant cavity 10 is communicated with the front sound cavity 20 through the first port 1211 and the notch 131. The resonant cavity 10 and the sound guide channel 30 are respectively arranged on two opposite sides of the sound generating unit 3.

In addition, since the thickness of the steel sheet 12 is much smaller than that of the top wall 11, a part of the top wall 11 is replaced with the steel sheet 12. The steel sheet 12 arranged right opposite to the joint of the sound guide channel 30 and the front sound cavity 20 greatly increases the sound outlet height of the sound guide channel 30, and the structure is beneficial to smooth sound airflow of the front cavity 40, so that the acoustic performance and the listening feeling of the loudspeaker box 100 are effectively improved.

The orthographic projection of the steel sheet 12 to the lower shell 2 direction falls into the sound guide channel 30 and the front sound cavity 20 simultaneously. I.e. the steel plate 12 is opposite to the joint of the sound guide channel 30 and the front sound cavity 20. The steel sheet 12 is harder than the top wall 11, i.e. the young's film amount of the steel sheet 12 is larger than that of the top wall 11, such a structure can be used to reduce harmonic spike distortion of the front cavity 40 of the speaker box 100 and improve its acoustic performance.

The supporting wall 13 is used for holding the sounding single body 3, and the supporting wall 13 and the sounding single body 3 are fixed through glue. This makes it possible to form a firm connection structure of the sound emitting unit 3 and the support wall 13.

The accommodating wall 14 is connected to one side of the supporting wall 13 far away from the sounding unit 3 and arranged around the resonant cavity 10, and the shape formed by the enclosing of the accommodating wall 14 and the supporting wall 13 is matched with the shape of the recess 121.

The cover plate 4 is a PET film made of PET material. The PET cover plate 4 is arranged opposite to the concave part 121 and sealed with the steel sheet 12. The PET material has high strength, light weight, excellent wear resistance, high size stability, high creep resistance, high fatigue resistance, low cost and high use performance-price ratio.

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 and 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, the loudspeaker box is characterized in that the upper shell comprises a top wall, a through hole and a steel sheet, the top wall is arranged opposite to the vibrating diaphragm, the through hole is arranged through the top wall, the steel sheet is covered on the through hole, the loudspeaker box further comprises a sunken part and a cover plate, the sunken part is formed from the steel sheet to the accommodating space, the cover plate is covered on the sunken part, and the, the resonant cavity is communicated with the front cavity.

2. The speaker box as claimed in claim 1, wherein the through hole and the resonant cavity are respectively connected to the front sound cavity, the recess is formed with a first opening connected to the front cavity, a side of the recess away from the sound-generating unit is surrounded by a second opening connected to the outside, and the cover plate is covered on the second opening and fixed to the recess.

3. The speaker box according to claim 2, wherein the upper housing further includes a supporting wall extending from a side of the top wall close to the sound generating unit to the lower housing and surrounding the through hole, and a receiving wall extending from a side of the top wall close to the sound generating unit to the lower housing and fixing the sound generating unit, the receiving wall being located on a side of the supporting wall away from the sound generating unit and surrounding the resonant cavity.

4. A loudspeaker enclosure according to claim 3, wherein the support wall is provided with a gap corresponding to the first port, the gap being in communication with the first port.

5. A loudspeaker enclosure according to claim 4, wherein the resonant cavity communicates with the front acoustic chamber through the first port and the gap.

6. A loudspeaker enclosure according to claim 1, 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 3, wherein the top wall, the receptacle wall and the support wall are integrally formed, and the steel sheet is fixed to an outer side surface of the top wall by injection molding.

8. A loudspeaker enclosure according to claim 1, wherein an orthographic projection of the steel sheet onto the lower shell falls into both the sound conduction channel and the front sound cavity.

9. A loudspeaker enclosure according to claim 1, wherein the upper and lower shells are secured by ultrasonic sealing.

10. A loudspeaker enclosure according to claim 1, wherein the cover sheet is a PET film.