CN101222784B - Loudspeaker box structure and mobile electronic equipments adopting the same - Google Patents

Loudspeaker box structure and mobile electronic equipments adopting the same Download PDF

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Publication number
CN101222784B
CN101222784B CN2007100729473A CN200710072947A CN101222784B CN 101222784 B CN101222784 B CN 101222784B CN 2007100729473 A CN2007100729473 A CN 2007100729473A CN 200710072947 A CN200710072947 A CN 200710072947A CN 101222784 B CN101222784 B CN 101222784B
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CN
China
Prior art keywords
cavity
tone chamber
ringwall
plate
box casing
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2007100729473A
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Chinese (zh)
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CN101222784A (en
Inventor
杨宗龙
白先声
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Hong Jun Precision Industry Co ltd
Fuzhun Precision Industry Shenzhen Co Ltd
Original Assignee
Hong Jun Precision Industry Co ltd
Fuzhun Precision Industry Shenzhen Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Hong Jun Precision Industry Co ltd, Fuzhun Precision Industry Shenzhen Co Ltd filed Critical Hong Jun Precision Industry Co ltd
Priority to CN2007100729473A priority Critical patent/CN101222784B/en
Publication of CN101222784A publication Critical patent/CN101222784A/en
Application granted granted Critical
Publication of CN101222784B publication Critical patent/CN101222784B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The present invention discloses a sound box structure, comprising a sound box housing and a loudspeaker arranged inside the sound box housing, which is characterized in that a front sound chamber and a rear sound chamber are formed inside the sound box housing; a sound outlet bore arranged on the front sound chamber is communicated with the outside; at least one clapboard is arranged between the front sound chamber and the rear sound chamber; the loudspeaker is arranged between the front sound chamber and the rear sound chamber; the front sound chamber is communicated with the rear sound chamber through a sound guiding bore arranged on the clapboard; a receiving space is formed in the sound box housing, a ring wall is arranged in the receiving space, a first cavity and a second cavity are formed through the separation of the loudspeaker in the ring wall by the loudspeaker, a third cavity and a fourth cavity is formed between the ring wall and a side plate by the clapboard; the first cavity is communicated with the third cavity to form the front sound chamber, the second cavity is communicated with the fourth cavity to form the rear sound chamber. The sound box structure is capable of enhancing the sound quality of loudspeakers. The invention further relates to a mobile electronic device having the sound box structure.

Description

Loudspeaker box structure and adopt the mobile electronic device of this loudspeaker box structure
Technical field
The present invention relates to a kind of loudspeaker box structure, particularly relates to a kind of loudspeaker box structure of mobile electronic device.
Background technology
Along with the fast development of information industry, the demand of mobile electronic device such as mobile phone (Mobile telephone), personal digital assistant (PDA) heightens.Mobile phone is as people's communication tool, and its basic functions is the transmission voice signal, is the transmission voice signal, needs to adopt sound-electricity conversion device that voice signal is converted to electric signal, perhaps electric signal is converted to structure quake to produce sound.Wherein, the sound-electricity conversion device that electric signal is converted to sound of extensive use is loud speaker (Loudspeaker).
In recent years, because mobile phone constantly develops towards compact direction, the size of the loud speaker that uses in mobile phone also is restricted.For the sounding that makes loud speaker obtains good sympathetic response, directly in the inner space of mobile phone, voice box casing is set usually, in loud speaker is contained in audio amplifier as loud speaker, thereby improve the sounding quality of this mobile phone.
Yet mobile phone constantly develops towards compact direction, and the inner space of mobile phone also reduces thereupon, and this reduces with regard to the dischargeable capacity that makes loudspeaker acoustic enclosure, thereby improves the low-frequency resonance frequency of this loudspeaker acoustic enclosure.The raising of this loudspeaker acoustic enclosure low-frequency resonance frequency will reduce the bass expressive ability of this loud speaker, improve the distortion factor of loud speaker, thereby influence the sounding quality of this mobile phone.
Summary of the invention
In view of this, be necessary to provide a kind of have loudspeaker box structure that promotes the sounding quality and the mobile electronic device that adopts this loudspeaker box structure.
A kind of loudspeaker box structure, comprise voice box casing and place the interior loud speaker of this voice box casing, tone chamber and back tone chamber before being formed with in this voice box casing, this preceding tone chamber is provided with sender and is in communication with the outside, be provided with at least one dividing plate between tone chamber and the back tone chamber before being somebody's turn to do, this loud speaker is located between this preceding tone chamber and the back tone chamber, this dividing plate is provided with voice guide hole and should be communicated with the back tone chamber by preceding tone chamber, this voice box casing is surrounded by base plate and side plate and form and form a receiving space in this voice box casing, be provided with the ringwall that is connected with this base plate in this receiving space, this loud speaker is housed in this ringwall and passes through this speaker area every forming first cavity and second cavity in ringwall, this dividing plate is connected this ringwall with the side plate of voice box casing, between the side plate of the periphery of this ringwall and voice box casing, to form the 3rd cavity and the 4th cavity, this first cavity is connected with the 3rd cavity and forms described preceding tone chamber, and this second cavity is connected with the 4th cavity and forms described back tone chamber.
A kind of mobile electronic device, comprise a shell, this shell is provided with sender, be provided with loudspeaker box structure in this shell, this loudspeaker box structure comprises voice box casing, the circuit board that places the loud speaker in this voice box casing and be electrically connected with loud speaker, tone chamber and back tone chamber before being formed with in this voice box casing, this preceding tone chamber is provided with sender and is in communication with the outside, be provided with at least one dividing plate between tone chamber and the back tone chamber before being somebody's turn to do, this loud speaker is located between this preceding tone chamber and the back tone chamber, this dividing plate is provided with voice guide hole and should be communicated with the back tone chamber by preceding tone chamber, this voice box casing is surrounded by base plate and side plate and form and form a receiving space in this voice box casing, be provided with the ringwall that is connected with this base plate in this receiving space, this loud speaker is housed in this ringwall and passes through this speaker area every forming first cavity and second cavity in ringwall, this dividing plate is connected this ringwall with the side plate of voice box casing, between the side plate of the periphery of this ringwall and voice box casing, to form the 3rd cavity and the 4th cavity, this first cavity is connected with the 3rd cavity and forms described preceding tone chamber, and this second cavity is connected with the 4th cavity and forms described back tone chamber.
Compared with prior art, form forward and backward tone chamber structure in the above-mentioned loudspeaker box structure respectively, loud speaker reaches the sound wave that sends backward forward and enters this forward and backward tone chamber generation resonance respectively, and should be communicated with this back tone chamber by preceding tone chamber by this voice guide hole.Because the connection of this voice guide hole, the sound wave that this back tone chamber sends is passed to the external world with the sound wave stack of being somebody's turn to do preceding tone chamber and after resonating, thereby reduce the low-frequency resonance frequency of this loudspeaker box structure effectively, the width of extending bandwidth, improve the radiation efficiency of woofer unit, and then promote the sounding quality of loud speaker.
Description of drawings
Fig. 1 is the wherein structural representation of an embodiment of mobile electronic device of the present invention (is example with the mobile phone).
Fig. 2 is the three-dimensional exploded view of the interior loudspeaker box structure of mobile phone shown in Figure 1 along first visual angle.
Fig. 3 is the three-dimensional exploded view of loudspeaker box structure shown in Figure 2 along second visual angle.
Fig. 4 is the stereogram of the voice box casing in the loudspeaker box structure shown in Figure 2.
Fig. 5 is the vertical view of the voice box casing in the loudspeaker box structure shown in Figure 2.
Fig. 6 is the part assembly drawing of loudspeaker box structure shown in Figure 2.
Fig. 7 is the stereogram of voice box casing second embodiment.
Fig. 8 is the stereogram of voice box casing the 3rd embodiment.
Embodiment
With reference to the accompanying drawings, be described further in conjunction with the embodiments.
Figure 1 shows that among the wherein embodiment of mobile electronic device of the present invention with mobile phone 100 to be the structural representation of example.This mobile phone 100 comprises a shell 10, and this shell 10 roughly is the cuboid structure, and the bottom section of this shell 10 forms a key zone 11, and middle section forms a viewing area 12, and the top then forms an articulating region 13.The sidewall of this articulating region 13 is provided with sender 132.
Please refer to Fig. 1 and Fig. 2, the inside of this shell 10 is provided with a loudspeaker box structure 20 in the position of the articulating region 13 of corresponding mobile phone 100, and this loudspeaker box structure 20 comprises a circuit board 30, a framework 40, a loud speaker 50 and a voice box casing 60.This loud speaker 50 places in this voice box casing 60, and folder is established this framework 40 between this voice box casing 60 and this circuit board 30, thereby forms this loudspeaker box structure 20.Certainly, this loudspeaker box structure 20 also can be applicable to other all kinds of mobile electronic devices such as Collapsible mobile telephone etc. except being applied to straight-plate-type mobile phone 100 shown in Figure 1.
Please refer to Fig. 2 to Fig. 4, this voice box casing 60 is a rectangle semi-closed structure, and it is surrounded by a base plate 61 and four side plates 62,63,64 and 65 and forms a receiving space.These side plates 62,63,64 and 65 end face all are positioned on the same plane, so that fit tightly with this framework 40.
Please refer to Fig. 4 and Fig. 5, the bearing of trend to four side plates 62,63,64 and 65 on the base plate 61 of this voice box casing 60 extends to form a tubular ringwall 66.This ringwall 66 inwardly protrudes out near an end of these base plates 61 and is provided with collar flange 661, and this flange 661 contacts with this base plate 61 and surrounds and form the first cavity 60a, and the top of ringwall 66 and this flange 661 is surrounded and formed the second cavity 60b.Also be provided with the dividing plate 67 that this ringwall 66 is connected with side plate 62 in this voice box casing 60, and the dividing plate 68 that this ringwall 66 is connected with side plate 65 middle parts.This base plate 61, ringwall 66, dividing plate 67,68 and side plate 62,65 surround and form the 3rd cavity 60c; This base plate 61, ringwall 66, dividing plate 67,68 and side plate 62,63,64,65 surround and form the 4th cavity 60d.The end face coplane of the end face of this dividing plate 67,68 and this side plate 62,65, this ringwall 66 and the 3rd cavity 60c the join end face partly and the end face coplane of this side plate 62,65, the join end face of low this side plate 62,65 of what of end face partly of this ringwall 66 and the 4th cavity 60d, difference in height and this second cavity 60b is connected with the 4th cavity 60d whereby.This ringwall 66 and the 4th cavity 60d upper end partly that joins is provided with a groove 662.The position of corresponding the 3rd cavity 60c is provided with a continuant orifice 663 on the flange 661 of this ringwall 66, and this continuant orifice 663 is connected this first cavity 60a with the 3rd cavity 60c.Certainly, this ringwall 66 also can amplexiform mutually with this side plate 62 and omit this dividing plate 67, can form the 3rd cavity 60c and the 4th cavity 60d equally.
The position of this side plate 65 corresponding the 3rd cavity 60c is provided with a sender 651, and the sender 132 that 651 pairs of this senders should shell 10 is provided with, and the 3rd cavity 60c is communicated with surrounding environment.
The bottom of this dividing plate 68 is provided with a voice guide hole 69 near these base plate 61 places.This voice guide hole 69 is a semicircular structure, and this voice guide hole 69 is communicated with the 3rd cavity 60c with the 4th cavity 60d, and the sound wave in the 4th cavity 60d can be passed in the 3rd cavity 60c via this voice guide hole 69.
Please refer to Fig. 2 and Fig. 3, this loud speaker 50 is a cylindrical-shaped structure, the front of this loud speaker 50 is provided with some preceding senders 52 (as shown in Figure 3), and the back side of this loud speaker 50 is provided with some backs sender 54 (as shown in Figure 2), and these loud speaker 50 sides are provided with a lug 56.This loud speaker 50 is electrically connected to circuit board 30, is used for the electric signal of circuit board 30 inputs is converted into sound wave, and spreads out of by preceding sender 52 and back sender 54.This loud speaker 50 can be assembled in the ringwall 66 of this voice box casing 60, during assembling, the preceding sender 52 of this loud speaker 50 is towards this first cavity 60a, and the end face butt of the front of this loud speaker 50 and this flange 661, to utilize this loud speaker 50 to be separated to form this first cavity 60a and the second cavity 60b, the lug 56 of this loud speaker 50 closely cooperates with the groove 662 of this ringwall 66, so that this loud speaker 50 is fixed in this ringwall 66.
Please refer to Fig. 2, Fig. 3 and Fig. 6, this framework 40 is to be made by damping materials such as rubber, glass fabric, sponges, this framework 40 be located at this sound equipment housing 60 side plate 62,63,64 and 65 and the end face of dividing plate 67,68 on (as shown in Figure 6), and be located between this voice box casing 60 and the circuit board 30.This framework 40 comprises a housing 41 and is located at a inside casing 42 in this housing 41.This housing 41 and this inside casing 42 are the thickness sheet body structure all identical with width.The shape that the side plate 62,63,64 of the shape of this housing 41 and this sound equipment housing 60 and 65 end face surround is roughly the same, but the width of this housing 41 is greater than the width of this side plate 62,63,64 and 65 end faces.The shape that the shape of this inside casing 42 and dividing plate 67, ringwall 66 and the 3rd cavity 60c join partly and the end face of dividing plate 68 surrounds is roughly the same.This framework 40 be located in this housing 60 side plate 62,63,64 and 65 and the end face and this circuit board 30 of this dividing plate 67,68 between, the contact position of this framework 40 and this circuit board 30 and voice box casing 60 utilizes adhesive (figure does not show) to fill bonding fully, filling up the space of 60 of this circuit board 30 and voice box casings, thereby reach damping and prevent the effect of the 3rd cavity 60c with the interior acoustical leakage of the 4th cavity 60d.
After the assembling, this first cavity 60a is connected by continuant orifice 663 with the 3rd cavity 60c and forms a preceding tone chamber 61a; This second cavity 60b and the 4th cavity 60d difference in height by these ringwall 66 end faces is connected and forms a back tone chamber 61b, and this back tone chamber 61b is by voice guide hole 69 and be communicated with this preceding tone chamber 61a.
The sound wave that loud speaker 50 is sent by preceding sender 52 and back sender 54, enter this preceding tone chamber 61a and back tone chamber 61b generation resonance respectively, and be radiated to the external world by sender 651 on the side plate 65 of voice box casing 60 and the sender 132 on the shell 10.Wherein, this loud speaker 50 is radiated to the external world through sender 651,132 then by preceding sender 52 sound wave that sends and the air generation resonance of being somebody's turn to do in the preceding tone chamber 61a; Loud speaker 50 is resonated by the back sound wave that sends of sender 54 and the air in the tone chamber 61b of this back, be passed in this preceding tone chamber 61a by this voice guide hole 69 then, resonate with the stack of sound wave in this preceding tone chamber 61a and with air in this preceding tone chamber 61a, be radiated to the external world through sender 651,132 then.The sound wave that gives off from the back sender 54 of this loud speaker 50 differs 180 degree with sound wave that preceding sender 52 from loud speaker 50 gives off in phase place on phase place, and this voice guide hole 69 will these back sender 54 radiation the phase place of sound wave fall turnback, so before being passed to via voice guide hole 69 from back tone chamber 61b the sound wave of tone chamber 61a and loud speaker 50 in the past the sound wave that gives off of sound hole 52 when this preceding tone chamber 61a of arrival with superimposed, wideer frequency band when so this loudspeaker box structure 20 can provide than this voice guide hole 69 not, the peak value of resonance frequency is moved to the low frequency place, have lower low-frequency resonance frequency, thereby improve the low-frequency resonance effect of sounding.
Simulation according to sound-vibration analysis software SYSNOISE draws, and when in this voice box casing 60 this voice guide hole 69 not being set, the low-frequency resonance frequency of this forward and backward tone chamber 61a, 61b is respectively 3000Hz, 6500Hz; And after this voice guide hole 69 was set, this forward and backward tone chamber 61a, 61b were interconnected, and its low-frequency resonance frequency is reduced to 1016Hz.This shows, adopt the mobile phone 100 of this loudspeaker box structure 20 can improve the low-frequency resonance effect of sounding, improve the radiation efficiency of loud speaker bass unit, the width of extending bandwidth, thereby promote the texture and abundant sense of sound, make sound intensity suitably and tend towards stability, avoid the generation of the tinkle of bells sharpening or unsweet sound phenomenon, and then obtain good sounding quality.
In addition, because folder has been established framework 40, can prevent that loudspeaker box structure 20 from spilling sound wave in the above-mentioned loudspeaker box structure 20, the frequency characteristic of sound is tended towards stability; Simultaneously, this framework 40 is made by the damping material, can reduce owing to the caused loud speaker 50 of sounding of loud speaker 50 and the transmission of 30 resonance of circuit board, thereby can avoid sound to be interfered, and promotes the sounding quality of mobile phone 100.
Please refer to Fig. 7, it is depicted as the schematic diagram of voice box casing second embodiment, the difference of itself and first embodiment is that the dividing plate 78 in this voice box casing 70 is a structure thicker, and promptly dividing plate 68 and the side plate 62,63,64,65 among this dividing plate 78 to the first embodiment is thick.The setting of the structure thicker by this dividing plate 78 can increase the length of voice guide hole 79, thereby regulate the low-frequency resonance frequency of this voice box casing 70, obtains required frequency response range.Simulation can draw according to sound-vibration analysis software SYSNOISE, and the low-frequency resonance frequency of this voice box casing 70 after connection is 704Hz, and is lower than the low-frequency resonance frequency 1016Hz of the voice box casing 60 of first embodiment, further promotes the sounding quality of loud speaker low frequency.
Please refer to Fig. 8, it is depicted as the schematic diagram of voice box casing the 3rd embodiment, the difference of itself and first embodiment is, this dividing plate 88 that is provided with voice guide hole 89 is connected the intersection of this ringwall 66 with this side plate 64,65, thereby increase the volume of the 3rd cavity 80c (preceding tone chamber 81a), relatively reduce the volume of the 4th cavity 80d (back tone chamber 81b) simultaneously.Because the variation of the volume of tone chamber 81a and back tone chamber 81b before being somebody's turn to do, the resonance frequency of this voice box casing 80 is also corresponding to change.Simulation according to sound-vibration analysis software SYSNOISE draws, and the low-frequency resonance frequency of this voice box casing 80 is 1427Hz, than the low-frequency resonance frequency 1016Hz height of the voice box casing 60 of first embodiment, thus can be suitable with the loud speaker of particular low frequency resonance frequency.
In sum, setting by these voice guide holes 69,79 and 89, should forward and backward tone chamber 61a (81a), 61b (81b) be connected, be passed to the external world after making this back tone chamber 61b, 81b sound wave that sends and the sound wave that is somebody's turn to do preceding tone chamber 61a, 81a superpose and resonate, thereby reduce the low-frequency resonance frequency of this loudspeaker box structure 20 effectively, the width of extending bandwidth improves the radiation efficiency of loud speaker bass unit, and then promotes the sounding quality of mobile phone 100.The setting of the thickness by this dividing plate 68,78,88 and should before tone chamber 61a, 81a and the setting of tone chamber 61b, 81b relative volume afterwards, can regulate the low-frequency resonance frequency of voice box casing 60,70,80, suitable with the low-frequency resonance frequency of loud speaker, the sounding quality of raising loud speaker.

Claims (14)

1. loudspeaker box structure, comprise voice box casing and place the interior loud speaker of this voice box casing, it is characterized in that: tone chamber and back tone chamber before being formed with in this voice box casing, this preceding tone chamber is provided with sender and is in communication with the outside, be provided with at least one dividing plate between tone chamber and the back tone chamber before being somebody's turn to do, this loud speaker is located between this preceding tone chamber and the back tone chamber, this dividing plate is provided with voice guide hole and should be communicated with the back tone chamber by preceding tone chamber, this voice box casing is surrounded by base plate and side plate and form and form a receiving space in this voice box casing, be provided with the ringwall that is connected with this base plate in this receiving space, this loud speaker is housed in this ringwall and passes through this speaker area every forming first cavity and second cavity in ringwall, this dividing plate is connected this ringwall with the side plate of voice box casing, between the side plate of the periphery of this ringwall and voice box casing, to form the 3rd cavity and the 4th cavity, this first cavity is connected with the 3rd cavity and forms described preceding tone chamber, and this second cavity is connected with the 4th cavity and forms described back tone chamber.
2. loudspeaker box structure according to claim 1 is characterized in that: this loud speaker to should before tone chamber and the back tone chamber be respectively equipped with before sender and the back sender.
3. loudspeaker box structure according to claim 1 is characterized in that: this dividing plate is a structure thicker with respect to the side plate of voice box casing.
4. loudspeaker box structure according to claim 1 is characterized in that: the bottom of this ringwall inwardly protrudes out the formation flange, and this loud speaker is carried on this flange, and this flange is provided with the continuant orifice that this first cavity is connected with the 3rd cavity.
5. loudspeaker box structure according to claim 1 is characterized in that: join partly end face of this ringwall and the 4th cavity is lower than the side plate that surrounds the 4th cavity and the end face of dividing plate, and this difference in height is connected this second cavity with the 4th cavity.
6. loudspeaker box structure according to claim 1 is characterized in that: this dividing plate connects this ringwall and the medium position of side plate wherein.
7. loudspeaker box structure according to claim 1 is characterized in that: this dividing plate connects this ringwall and the intersection location of two side plates wherein.
8. loudspeaker box structure according to claim 1, it is characterized in that: also comprise the circuit board that is electrically connected with this loud speaker and be located in framework between this voice box casing and the circuit board, this voice box casing is a semiclosed housing, this circuit board is located at the open side of this voice box casing, and this framework is made by the damping material.
9. mobile electronic device, comprise a shell, this shell is provided with sender, be provided with loudspeaker box structure in this shell, this loudspeaker box structure comprises voice box casing, the circuit board that places the loud speaker in this voice box casing and be electrically connected with loud speaker, it is characterized in that: tone chamber and back tone chamber before being formed with in this voice box casing, this preceding tone chamber is provided with sender and is in communication with the outside, be provided with at least one dividing plate between tone chamber and the back tone chamber before being somebody's turn to do, this loud speaker is located between this preceding tone chamber and the back tone chamber, this dividing plate is provided with voice guide hole and should be communicated with the back tone chamber by preceding tone chamber, this voice box casing is surrounded by base plate and side plate and form and form a receiving space in this voice box casing, be provided with the ringwall that is connected with this base plate in this receiving space, this loud speaker is housed in this ringwall and passes through this speaker area every forming first cavity and second cavity in ringwall, this dividing plate is connected this ringwall with the side plate of voice box casing, between the side plate of the periphery of this ringwall and voice box casing, to form the 3rd cavity and the 4th cavity, this first cavity is connected with the 3rd cavity and forms described preceding tone chamber, and this second cavity is connected with the 4th cavity and forms described back tone chamber.
10. mobile electronic device according to claim 9 is characterized in that: also comprise the framework that is located between this voice box casing and the circuit board, this framework is made by the damping material.
11. mobile electronic device according to claim 9 is characterized in that: this dividing plate is a structure thicker with respect to the side plate of voice box casing.
12. mobile electronic device according to claim 9 is characterized in that: the bottom of this ringwall inwardly protrudes out the formation flange, and this loud speaker is carried on this flange, and this flange is provided with the continuant orifice that this first cavity is connected with the 3rd cavity.
13. mobile electronic device according to claim 9 is characterized in that: join partly end face of this ringwall and the 4th cavity is lower than the side plate that surrounds the 4th cavity and the end face of dividing plate, and this difference in height is connected this second cavity with the 4th cavity.
14. according to each described mobile electronic device in the claim 9 to 13, it is characterized in that: this mobile electronic device is mobile phone or personal digital assistant.
CN2007100729473A 2007-01-12 2007-01-12 Loudspeaker box structure and mobile electronic equipments adopting the same Expired - Fee Related CN101222784B (en)

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CN2007100729473A CN101222784B (en) 2007-01-12 2007-01-12 Loudspeaker box structure and mobile electronic equipments adopting the same

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Application Number Priority Date Filing Date Title
CN2007100729473A CN101222784B (en) 2007-01-12 2007-01-12 Loudspeaker box structure and mobile electronic equipments adopting the same

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CN101222784A CN101222784A (en) 2008-07-16
CN101222784B true CN101222784B (en) 2011-08-24

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102769808A (en) * 2012-05-24 2012-11-07 四川华立德科技有限公司 Loudspeaker for portable equipment
CN104066031B (en) * 2013-03-22 2018-12-21 南京中兴新软件有限责任公司 The application method of sound chamber, the device including sound chamber, mobile terminal and sound chamber
CN103945299A (en) * 2014-03-21 2014-07-23 山东共达电声股份有限公司 Miniature loudspeaker system and electronic equipment
DE102014112784A1 (en) * 2014-09-04 2016-03-10 USound GmbH Speaker layout
US10516948B2 (en) 2017-02-28 2019-12-24 USound GmbH Loudspeaker arrangement
CN108462927B (en) * 2018-03-22 2020-12-25 Oppo广东移动通信有限公司 Sound cavity shell, mobile terminal shell and mobile terminal
CN108769879B (en) * 2018-06-15 2021-10-15 Oppo广东移动通信有限公司 Back sound cavity subassembly and electronic equipment

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CN2662556Y (en) * 2003-12-18 2004-12-08 马刚 A minitype sound box used on handset

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CN2662556Y (en) * 2003-12-18 2004-12-08 马刚 A minitype sound box used on handset

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