CN109788395B

CN109788395B - Loudspeaker box

Info

Publication number: CN109788395B
Application number: CN201811650381.2A
Authority: CN
Inventors: 吴军
Original assignee: AAC Acoustic Technologies Shenzhen Co Ltd
Current assignee: AAC Technologies Holdings Shenzhen Co Ltd
Priority date: 2018-12-31
Filing date: 2018-12-31
Publication date: 2021-05-04
Anticipated expiration: 2038-12-31
Also published as: CN109788395A

Abstract

The invention provides a loudspeaker box, which comprises a first shell, a second shell and a loudspeaker monomer, wherein the first shell and the loudspeaker monomer enclose to form a front cavity, the first shell, the second shell and the loudspeaker monomer enclose to form a rear cavity, sound absorption particles are filled in the rear cavity, a leakage channel is arranged on the loudspeaker monomer, the leakage channel leaks from the side surface, the first shell comprises a bottom wall, the loudspeaker monomer also comprises a magnetic yoke, the bottom wall extends into the rear cavity to form a baffle wall, a cover plate and the bottom wall are fixedly arranged on the baffle wall, the blocking wall and the cover plate are enclosed to form an auxiliary leakage part, the auxiliary leakage part completely covers the leakage channel and enables the ventilation space to be communicated with the leakage channel, the cover plate comprises a first plate body, a second plate body and a ventilation isolating piece, the first plate body is provided with ventilation holes, and the ventilation isolating piece is fixedly arranged on the first plate body and covers the ventilation holes so that the ventilation space is communicated with the air in the rear cavity; the second shell is provided with a through hole, and the second plate body and the magnetic yoke are accommodated in the through hole. The loudspeaker box has better acoustic performance.

Description

Loudspeaker box

[ technical field ] A method for producing a semiconductor device

The invention relates to the field of acoustoelectric, in particular to a loudspeaker box applied to portable electronic products.

[ background of the invention ]

With the advent of the mobile internet age, the number of smart mobile devices is increasing. Among the mobile devices, the mobile phone is undoubtedly the most common and portable mobile terminal device. At present, the functions of a mobile phone are very diverse, one of which is a high-quality music function, and thus, a speaker box for playing sound is widely applied to the current smart mobile devices.

The speaker including have accommodating space the casing and accept in speaker monomer in the accommodating space, speaker monomer will accommodating space separates into back chamber and antechamber, in order to obtain better audio effect, often needs set up virtual sound chamber in accommodating space (especially back intracavity) to at virtual sound intracavity filling inhale the sound granule. The following are mainly adopted for the design of the virtual sound cavity in the related art:

firstly, a hot melting scheme: fixing the separation net on the retaining wall by hot melting;

secondly, a full filling scheme: the single body is ventilated through the mesh cloth, the whole volume of the rear cavity is used as the volume of the virtual sound cavity, and the mesh cloth blocks the powder particles from entering the single body to cause noise;

thirdly, board inserting scheme: and the virtual sound cavity independent area is formed by the partition of the plug board.

The hot melting scheme cannot effectively utilize the BOX cavity to maximize the volume of the virtual sound cavity, and the hot melting retaining wall occupies much BOX cavity space; the full-filling scheme can cause the problem of audio performance loss caused by unsmooth air outlet of a monomer leakage channel; although the volume occupied by the hot-melting virtual acoustic cavity retaining wall is reduced and the volume of the virtual acoustic cavity is greatly improved by the inserting plate scheme, the volume of the rear cavity cannot be fully and effectively utilized. That is, the above three schemes cannot simultaneously consider leakage maximization and virtual acoustic cavity volume maximization.

Therefore, there is a need to provide a new speaker box to solve the above technical problems.

[ summary of the invention ]

The invention aims to provide a loudspeaker box which can simultaneously give consideration to leakage maximization and virtual sound cavity volume maximization.

In order to achieve the above object, the present invention provides a speaker box, including a first housing, a second housing assembled with the first housing to form an accommodating space, and a speaker unit accommodated in the accommodating space, wherein the first housing and the speaker unit enclose a front cavity, the first housing, the second housing and the speaker unit enclose a rear cavity, the rear cavity is filled with sound absorbing particles, the speaker unit is provided with a leakage channel for communicating an inner space thereof with the rear cavity, the speaker unit has a side surface, the leakage channel leaks from the side surface, the first housing includes a bottom wall, the speaker unit is fixedly disposed on the bottom wall, the speaker unit further has a magnetic yoke, the bottom wall extends into the rear cavity to form a blocking wall, the blocking wall is fixedly disposed on the blocking wall, the bottom wall is fixedly disposed on the cover plate, and the bottom wall, The baffle wall and the cover plate are enclosed to form an auxiliary leakage part with a ventilation space, the auxiliary leakage part completely covers the leakage channel and enables the ventilation space to be communicated with the leakage channel, the cover plate comprises a first plate body positioned in the rear cavity, a second plate body extending from the first plate body to the loudspeaker single body and a ventilation isolating piece, the first plate body is provided with a ventilation hole, the ventilation isolating piece is fixedly arranged on the first plate body and covers the ventilation hole, and the ventilation space is communicated with the rear cavity through the ventilation isolating piece; the second shell is provided with a through hole, and the second plate body and the magnetic yoke are contained in the through hole.

Preferably, the air-permeable isolating piece and the first plate body are subjected to injection molding, or the air-permeable isolating piece and the first plate body are fixed in a hot melting or dispensing or gum-applying mode.

Preferably, a mounting step is formed on one side of the blocking wall far away from the bottom wall, and the cover plate is fixed on the mounting step.

Preferably, the two opposite sides of the speaker unit are respectively provided with the leakage channel, and the auxiliary leakage portions are two and respectively communicated with the two leakage channels.

Preferably, the speaker unit is rectangular, and the two leakage channels are respectively located on two opposite sides of a short axis of the speaker unit.

Preferably, the speaker unit includes a frame supported by the bottom wall and surrounded by frame side walls, and a magnetic yoke at least partially fixed to the frame side walls, the magnetic yoke at least partially spaced from the frame side walls along a vibration direction to form the leakage channel.

Preferably, the speaker box still includes run through irritate the powder hole that first casing set up with be fixed in first casing just covers and establishes irritate the sealed lid in powder hole, irritate the powder hole with the back chamber intercommunication, inhale the sound granule by irritate the powder hole and irritate the back chamber.

Preferably, the blocking wall includes a first blocking wall spaced apart from the speaker unit, and a second blocking wall and a third blocking wall bent and extended from two ends of the first blocking wall toward the speaker unit, and the second blocking wall, the third blocking wall and the cover plate are abutted to the speaker unit so that the auxiliary leakage portion completely covers the leakage channel.

Preferably, one end of the second blocking wall and the third blocking wall, which abut against the speaker unit, is higher than one end of the second blocking wall and the third blocking wall, which are connected to the first blocking wall.

Compared with the prior art, the loudspeaker box disclosed by the invention has the advantages that the sound-absorbing particles encapsulated in the rear cavity are isolated from the leakage channel through the auxiliary leakage part formed by enclosing the bottom wall, the baffle wall and the cover plate, so that the problem of unsmooth air pressure leakage caused by blockage of the leakage channel of the loudspeaker monomer by the sound-absorbing particles is avoided, meanwhile, the leakage space of the leakage channel is increased, and the sound production reliability is improved; simultaneously because the diapire the wall that keeps off reaches the outside that the apron encloses the supplementary leakage portion that closes the formation all is used for the encapsulation to inhale the sound granule and forms virtual sound chamber, is used for improving the low frequency acoustic performance of speaker box makes back chamber maximization utilization has effectively improved low frequency acoustic performance, and then reaches the purpose of compromise simultaneously and reveal maximize and virtual sound chamber volume maximize. In addition, the second shell is provided with a through hole, and the second plate body and the magnetic yoke are accommodated in the through hole, so that the magnetic yoke leaks outwards, and the size of the loudspeaker box in the vibration direction of the loudspeaker single body is reduced.

[ description of the drawings ]

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

FIG. 1 is an exploded view of a loudspeaker enclosure of the present invention;

fig. 2 is a schematic structural view of a first housing in the loudspeaker enclosure of fig. 1;

FIG. 3 is a perspective view of the speaker box of FIG. 1 partially assembled

FIG. 4 is a perspective view of the speaker cabinet of FIG. 1 fully assembled;

FIG. 5 is a cross-sectional view in the direction of A-A of the loudspeaker enclosure of FIG. 4;

fig. 6 is an enlarged view of a portion a in the speaker box shown in fig. 5.

[ detailed description ] embodiments

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 6, the speaker box 100 includes a first housing 1, a second housing 2 assembled with the first housing 1 to form an accommodating space, and a speaker unit 3 accommodated in the accommodating space, wherein the first housing 1 and the speaker unit 3 enclose a front cavity a, the first housing 1, the second housing 2, and the speaker unit 3 enclose a rear cavity B, and the rear cavity B is filled with sound-absorbing particles (not shown). Wherein the front cavity a is used for sound production and the back cavity B is used for improving the low frequency acoustic performance of the loudspeaker enclosure 100.

The first shell 1 comprises a bottom wall 11, and the loudspeaker single body 3 is fixedly arranged on the bottom wall 11.

The loudspeaker single body 3 is provided with a leakage channel 3A which communicates the inner space of the loudspeaker single body with the rear cavity B, and the leakage channel 3A is used for transmitting sound pressure to the rear cavity B so as to increase the low-frequency acoustic performance of the loudspeaker box.

Wherein the speaker unit 3 has a side surface from which the leak path 3A leaks. Specifically, the speaker unit 3 includes a frame 31 supported by the bottom wall 11 and surrounded by frame side walls 311, and a yoke 33 at least partially fixed to the frame side walls 311, where the yoke 33 is at least partially spaced from the frame side walls 311 in a vibration direction to form the leakage path 3A, so that the leakage path 3A leaks from the side surface. As shown in fig. 3 and 5, the vibration direction is the Z-axis direction, and the leakage direction of the leakage path 3A is the X-axis direction. Of course, in other embodiments, the leakage direction of the leakage channel 3A may also be the Y-axis direction. Of course, in other embodiments, the leakage channel may also be provided on the side wall of the tub stand.

The bottom wall 11 extends into the rear cavity B to form a blocking wall 12, a cover plate 13 is fixedly arranged on the blocking wall 12, the bottom wall 11, the blocking wall 12 and the cover plate 13 enclose an auxiliary leakage part with a ventilation space 15, the auxiliary leakage part completely covers the leakage channel 3A and enables the ventilation space 15 to be communicated with the leakage channel 3A, wherein the cover plate 13 comprises a first plate body 131 positioned in the rear cavity B, a second plate body 133 extending from the first plate body 131 to the speaker unit 3 and a ventilation isolating piece 135, the first plate body 131 is provided with ventilation holes 137, the ventilation isolating piece 135 is fixedly arranged on the first plate body 131 and covers the ventilation holes 137, and the ventilation space 15 is in air communication with the rear cavity B through the ventilation isolating piece 135; the second housing 2 has a through hole 21, and the second plate 133 and the yoke 33 are accommodated in the through hole 21. When the speaker unit 3 vibrates, the air flow inside the speaker unit flows into the air-permeable space 15 from the leakage path 3A, and then flows from the air-permeable space 15 to the rear cavity B through the air-permeable spacer 135, and the direction of the air flow is shown by an arrow in fig. 6. The auxiliary leakage part formed by enclosing the bottom wall 11, the baffle wall 12 and the cover plate 13 isolates the sound-absorbing particles encapsulated in the rear cavity B from the leakage channel 3A, so that the problem that the leakage channel 3A of the loudspeaker single body 3 is blocked by the sound-absorbing particles to cause unsmooth air pressure leakage is avoided, meanwhile, the leakage space of the leakage channel 3A is increased, and the sound production reliability is improved; simultaneously because the diapire 11, keep off wall 12 and the apron 13 encloses the outside of closing the supplementary leakage portion that forms and all is used for the encapsulation to inhale the sound granule and forms virtual sound chamber, is used for improving loudspeaker box 100's low frequency acoustic performance, thereby make back chamber B maximize utilization, effectively improved low frequency acoustic performance. In addition, since the second housing 2 is provided with the through hole 21, and the second plate 133 and the yoke 33 are accommodated in the through hole 21, the yoke 33 can be made to leak, which is beneficial to reducing the size of the speaker box in the vibration direction of the speaker unit.

Wherein, the second plate 133 and the second housing 2 may be sealed by gluing; the breathable partition member 135 is any one of a non-woven fabric, a nylon woven mesh, a wool woven mesh, a metal mesh and tone tuning paper.

In this embodiment, a mounting step 121 is formed on a side of the blocking wall 12 away from the bottom wall 11, and the cover plate 13 is fixed on the mounting step 121.

The blocking wall 12 and the cover plate 13 are fixed by ultrasonic welding, or by heat melting, gluing, or the like.

In this embodiment, the air-permeable partition 135 and the first plate 131 are injection molded, or the air-permeable partition 135 and the first plate 131 are fixed by hot melting, dispensing or gluing.

In this embodiment, the two opposite sides of the speaker unit 3 are respectively provided with the leakage passages 3A, and the auxiliary leakage portions are provided with two and respectively communicated with the two leakage passages 3A.

Further, the speaker unit 3 has a rectangular shape, and the two leakage paths 3A are respectively located on two opposite sides of the short axis of the speaker unit 3, i.e., in the X-axis direction as shown in fig. 3 and 5. Thus, the auxiliary leakage part can extend along the long axis direction, and the reliability is better.

In this embodiment, the speaker box 100 further includes a powder filling hole 5 penetrating through the first housing 1 and a sealing cover 7 fixed to the first housing 1 and covering the powder filling hole 5, the powder filling hole 5 is communicated with the rear cavity B, and the sound absorbing particles are filled into the rear cavity B through the powder filling hole 5. Of course, in other embodiments, the powder filling hole and the sealing cover may be disposed on the second housing 2.

In this embodiment, the blocking wall 12 includes a first blocking wall 12A disposed at an interval from the speaker unit 3, and a second blocking wall 12B and a third blocking wall 12C bent and extended from two ends of the first blocking wall 12A toward the speaker unit 3, and the second blocking wall 12B, the third blocking wall 12C and the cover plate 13 are abutted to the speaker unit 3 so that the auxiliary leakage portion completely covers the leakage channel 3A. As shown in fig. 2, the mounting step 121 is divided into three parts connected in sequence, and the three parts are respectively located on the first blocking wall 12A, the second blocking wall 12B and the third blocking wall 12C.

Further, one end of the second blocking wall 12B and the third blocking wall 12C, which abut against the speaker unit 3, is higher than one end of the first blocking wall 12A, which is connected to the second blocking wall 12B and the third blocking wall 12C. This allows the air-permeable partition 135 to be inclined, thereby increasing a leakage space for air flowing through the cover plate 13 from the air-permeable space 15 to the rear chamber B.

Compared with the prior art, the loudspeaker box disclosed by the invention has the advantages that the sound-absorbing particles encapsulated in the rear cavity B are isolated from the leakage channel 3A through the auxiliary leakage part formed by enclosing the bottom wall 11, the baffle wall 12 and the cover plate 13, so that the problem of unsmooth air pressure leakage caused by blockage of the leakage channel 3A of the loudspeaker single body 3 by the sound-absorbing particles is avoided, meanwhile, the leakage space of the leakage channel 3A is increased, and the sound production reliability is improved; simultaneously because the diapire 11 the wall 12 reaches the apron 13 encloses the outside of closing the supplementary leakage portion that forms and all is used for the encapsulation to inhale the sound granule and forms virtual sound chamber, is used for improving loudspeaker box 100's low frequency acoustic performance makes back chamber B maximization utilizes, has effectively improved low frequency acoustic performance, and then reaches the mesh of compromise simultaneously and reveal maximize and virtual sound chamber volume maximize. In addition, since the second housing 2 is provided with the through hole 21, and the second plate 133 and the yoke 33 are accommodated in the through hole 21, the yoke 33 can be made to leak, which is beneficial to reducing the size of the speaker box in the vibration direction of the speaker unit.

While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.

Claims

1. A loudspeaker box comprises a first shell, a second shell matched with the first shell to form an accommodating space, and a loudspeaker monomer accommodated in the accommodating space, wherein the first shell and the loudspeaker monomer enclose a front cavity, the first shell, the second shell and the loudspeaker monomer enclose a rear cavity, sound absorption particles are filled in the rear cavity, a leakage channel for communicating the inner space of the loudspeaker monomer with the rear cavity is arranged on the loudspeaker monomer, the loudspeaker monomer is provided with a side surface, the leakage channel is leaked from the side surface, the first shell comprises a bottom wall, the loudspeaker monomer is fixedly arranged on the bottom wall, and a magnetic yoke is further arranged on the loudspeaker monomer. The auxiliary leakage part completely covers the leakage channel and enables the ventilation space to be communicated with the leakage channel, wherein the cover plate comprises a first plate body positioned in the rear cavity, a second plate body extending from the first plate body to the loudspeaker single body and a ventilation isolating piece, the first plate body is provided with a ventilation hole, the ventilation isolating piece is fixedly arranged on the first plate body and covers the ventilation hole, and the ventilation space is communicated with the rear cavity through the ventilation isolating piece; the second shell is provided with a through hole, and the second plate body and the magnetic yoke are accommodated in the through hole and abutted against the magnetic yoke; the baffle wall comprises a first baffle wall arranged at intervals with the loudspeaker monomer, and a second baffle wall and a third baffle wall which are bent and extended from two ends of the first baffle wall to the loudspeaker monomer, and the second baffle wall, the third baffle wall and the cover plate are abutted with the loudspeaker monomer so that the auxiliary leakage part completely covers the leakage channel;

the second blocking wall and the third blocking wall are connected to one end of the first blocking wall, and one end, abutted to the loudspeaker single body, of the second blocking wall and one end, abutted to the loudspeaker single body are higher than those of the second blocking wall and one end, connected to the first blocking wall, of the third blocking wall.

2. The speaker box of claim 1, wherein the air-permeable partition is injection molded with the first plate, or the air-permeable partition is fixed with the first plate by hot melting or dispensing or gluing.

3. A loudspeaker enclosure as claimed in claim 1, characterized in that the side of the retaining wall remote from the bottom wall is formed with a mounting step on which the cover plate is fixed.

4. The speaker box as claimed in claim 1, wherein the leakage paths are respectively provided at two opposite sides of the speaker unit, and the auxiliary leakage portions are provided in two and respectively communicate with the two leakage paths.

5. A loudspeaker enclosure according to claim 4, wherein the speaker unit is rectangular and the two leakage paths are located on opposite sides of a minor axis of the speaker unit.

6. A loudspeaker cabinet according to claim 1, wherein the loudspeaker unit comprises a frame supported by the bottom wall and bounded by frame side walls, and a yoke secured at least in part to the frame side walls, the yoke being spaced at least in part from the frame side walls in the direction of vibration to form the leakage path.

7. The speaker box of claim 1, further comprising a powder filling hole formed through the first housing and a sealing cover fixed to the first housing and covering the powder filling hole, wherein the powder filling hole is communicated with the rear cavity, and the sound-absorbing particles are filled into the rear cavity through the powder filling hole.