CN110381426B

CN110381426B - Loudspeaker box

Info

Publication number: CN110381426B
Application number: CN201910627055.8A
Authority: CN
Inventors: 孟义明; 张古清; 庞威
Original assignee: AAC Optoelectronic Changzhou Co Ltd
Current assignee: Jiangsu Jicui Zhongyi Technology Industry Development Co ltd; AAC Microtech Changzhou Co Ltd
Priority date: 2019-07-11
Filing date: 2019-07-11
Publication date: 2021-08-31
Anticipated expiration: 2039-07-11
Also published as: CN110381426A; WO2021003754A1

Abstract

The invention provides a loudspeaker box which comprises an upper shell, a lower shell and a loudspeaker monomer, wherein the lower shell is matched with the upper shell to form an accommodating space, the loudspeaker monomer is accommodated in the accommodating space and comprises a vibrating diaphragm for vibrating and sounding and an upper cover arranged between the vibrating diaphragm and the upper shell, the upper cover and the vibrating diaphragm form a front sound cavity, the lower shell, the upper cover and the vibrating diaphragm are matched to form a rear cavity, the rear cavity comprises a first rear cavity arranged in the loudspeaker monomer and a second rear cavity positioned outside the loudspeaker monomer and communicated with the first rear cavity, and the upper cover is provided with a through hole for communicating the front sound cavity with the second rear cavity. Compared with the prior art, the loudspeaker box has the advantages that the air pressure in the front sound cavity and the air pressure in the rear cavity are balanced, and the acoustic performance is good.

Description

Loudspeaker box

[ technical field ] A method for producing a semiconductor device

The invention relates to the field of sound-electricity conversion, in particular to a loudspeaker box.

[ 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.

In the correlation technique, the speaker box includes upper cover, basin frame, vibration system and magnetic circuit, and vibration system includes the vibrating diaphragm, and upper cover and vibrating diaphragm interval form the antechamber, and vibrating diaphragm, basin frame and magnetic circuit cooperation form the back chamber, the back chamber seals, and in wearing class equipment or cell-phone, when speaker box circular telegram work, owing to generate heat the reason and make back chamber temperature rise, lead to the increase of back chamber cavity internal pressure to oppression speaker box vibrating diaphragm moves to the preceding vocal cavity, has weakened the vibration volume of vibrating diaphragm, makes speaker box sound diminish or noiseless.

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

[ summary of the invention ]

The invention aims to provide a loudspeaker box capable of balancing air pressure of a front cavity and a rear cavity.

The invention provides a loudspeaker box which comprises an upper shell, a lower shell and a loudspeaker monomer, wherein the lower shell is matched with the upper shell to form an accommodating space, the loudspeaker monomer is accommodated in the accommodating space and comprises a vibrating diaphragm for vibrating and sounding and an upper cover arranged between the vibrating diaphragm and the upper shell, the upper cover and the vibrating diaphragm form a front sound cavity, the lower shell, the upper cover and the vibrating diaphragm are matched to form a rear cavity, the rear cavity comprises a first rear cavity arranged in the loudspeaker monomer and a second rear cavity positioned outside the loudspeaker monomer and communicated with the first rear cavity, and the upper cover is provided with a through hole for communicating the front sound cavity with the second rear cavity.

Preferably, the speaker unit further includes a ventilation member fixedly connected to the upper cover, and the ventilation member completely covers the through hole.

Preferably, the air permeable member is an air permeable waterproof membrane.

Preferably, the loudspeaker unit further comprises a basin frame fixedly connected with the upper cover, a leakage hole is formed in the basin frame, and the leakage hole is communicated with the first rear cavity and the second rear cavity.

Preferably, the upper cover includes the roof that sets up with the parallel interval of vibrating diaphragm and certainly the edge of roof is to being close to the lateral wall that the basin frame direction extends, the lateral wall with basin frame fixed connection, the edge clamp of vibrating diaphragm is located the lateral wall with between the basin frame, the through hole set up in the lateral wall.

Preferably, the side wall includes an inner side surface close to the accommodating space and an outer side surface opposite to the inner side surface, the outer side surface is recessed towards the direction close to the inner side surface to form a groove, and the through hole is communicated with the groove.

Preferably, the ventilating piece is accommodated in the groove, and the thickness of the ventilating piece is smaller than or equal to the depth of the groove.

Preferably, the ventilative piece includes the fixed part that two parallel intervals set up and connects two the connecting portion of fixed part, the fixed part with connecting portion integrated into one piece, the fixed part with lateral wall fixed connection, connecting portion with the fixed part cooperation forms a breach, the breach with the through hole is just to setting up.

Preferably, the number of the through holes is plural, and the plural through holes are sequentially provided at intervals.

Compared with the prior art, the loudspeaker box provided by the invention has the advantages that the upper cover is provided with the through hole for communicating the front sound cavity with the second back cavity, the basin frame is provided with the leakage hole for communicating the first back cavity with the second back cavity, so that the front sound cavity, the second back cavity and the first back cavity are sequentially communicated, the air pressure in the front sound cavity and the air pressure in the back cavity can be kept in a balanced state, the vibration quantity of the vibration membrane is ensured, the acoustic performance of the loudspeaker box is improved, meanwhile, the through hole 13 is completely covered by the air permeable piece, and the waterproof performance of the loudspeaker box can be improved.

[ description of the drawings ]

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 an enlarged view of the area III shown in FIG. 2;

FIG. 4 is another perspective view of the upper cover of FIG. 2;

FIG. 5 is a cross-sectional view of the loudspeaker enclosure shown in FIG. 1 taken along line V-V;

fig. 6 is a cross-sectional view of the loudspeaker enclosure shown in fig. 1, taken along line VI-VI.

[ 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.

Referring to fig. 1 to 6, the present invention provides a speaker box 100, where the speaker box 100 includes an upper casing 10, a lower casing 20 cooperating with the upper casing 10 to form a receiving space, and a speaker unit 30 received in the receiving space.

The upper case 10 includes a top plate 101, a side plate 102 extending from an edge of the top plate 101 to be bent toward the lower case 20, and a support plate 103 extending from a middle area of the top plate 101 toward the speaker unit 30. The lower case 20 is correspondingly covered on the side plate 102, and the speaker unit 30 abuts on the support plate 103.

The top plate 101 is provided with a sound outlet 1010 communicated with the outside, the speaker unit 30 vibrates to produce sound, and the sound outlet 1010 is used for conducting sound to the outside.

The sounding monomer 30 comprises an upper cover 1, a basin frame 2 fixedly connected with the upper cover 1, and a vibrating diaphragm 3 clamped between the upper cover 1 and the basin frame 2. The upper cover 1 is clamped between the vibrating diaphragm 3 and the upper cover 10, the upper cover 1 and the vibrating diaphragm 3 form a front sound cavity 40, the lower cover 20, the upper cover 10, the upper cover 1 and the vibrating diaphragm 3 are matched to form a rear cavity 50, the upper cover 1 is further provided with a sound guide channel 60 communicating the front sound cavity 40 with the sound outlet 1010, and the front sound cavity 40 and the sound guide channel 60 jointly form a front cavity 70. Further, the rear cavity 50 includes a first rear cavity 51 disposed in the speaker unit 30 and a second rear cavity 52 located outside the speaker unit 30 and communicating with the first rear cavity 51.

The upper cover 1 and the upper shell 10 are fixedly connected through a glue layer 90, specifically, the glue layer 90 is rectangular and annular and is arranged between the top plate 101 and the upper cover 1.

The upper cover 1 comprises a top wall 11 parallel to the diaphragm 3 and a side wall 12 extending from the edge of the top wall 11 to the direction close to the basin frame 2, and further, the upper cover 1 is further provided with a through hole 13 communicating the front acoustic cavity 40 with the second rear cavity 52.

The side wall 12 is fixedly connected with the basin frame 2, and the edge of the vibrating diaphragm 3 is clamped between the side wall 12 and the basin frame 2, so that the vibrating diaphragm 3 is firmly connected and is not easy to fall off.

The side wall 12 includes an inner side surface 121 close to the accommodating space 10 and an outer side surface 122 opposite to the inner side surface 121, the outer side surface 122 is recessed toward the inner side surface 121 to form a groove 120, and the through hole 13 is communicated with the groove 120.

The number of the through-holes 13 may be one or plural, and when the number of the through-holes 13 is plural, the plural through-holes 13 are sequentially provided at intervals. The through hole 13 may be disposed on a long side of the sidewall 12, a short side of the sidewall 12, or both the long side and the short side of the sidewall 12, which is not limited in the present invention.

The longitudinal cross-sectional shape of the through hole 13 may be a circle, a square, a triangle, or other irregular shapes, which does not affect the conduction performance of the through hole 13, and the invention is not limited thereto.

Further, the basin frame 2 is provided with a leakage hole 21, the leakage hole 21 is communicated with the first rear cavity 51 and the second rear cavity 52, and is used for balancing the air pressure in the first rear cavity 51 and the second rear cavity 52 and reducing high-frequency noise.

The speaker unit 30 further includes a ventilation member 4 fixedly connected to the upper cover 1, and the ventilation member 4 completely covers the through hole 13. Specifically, the air permeable member 4 is fixedly connected to the side wall 12 and is completely accommodated in the groove 120, and the thickness of the air permeable member 4 is smaller than or equal to the depth of the groove 120, so that after the air permeable member 4 is installed, one surface of the air permeable member 4 away from the accommodating space does not protrude out of the outer side surface 122, and the assembly of the speaker box 100 and other devices is not affected. Preferably, the breathable piece is a breathable waterproof film, so that smooth circulation of gas can be ensured, and meanwhile, a waterproof effect can be achieved.

Further, ventilative piece 4 includes the fixed part 41 that two parallel intervals set up and connects two the connecting portion 42 of fixed part 41, fixed part 41 with connecting portion 42 integrated into one piece, fixed part 41 with lateral wall 12 fixed connection, connecting portion 42 with fixed part 41 cooperation forms a breach 43, breach 43 with through hole 13 is just to setting up, through hole 13 to the projection of ventilative piece 4 direction falls into completely in the within range of connecting portion 42. It will be appreciated that the provision of the notches 43 such that the thickness of the connecting portion 42 is less than the thickness of the fixing portion 41 increases the air permeability of the air permeable member 4.

In the use process of the loudspeaker box 100, due to temperature rise, the temperature in the second rear cavity 52 rises, and air is heated to expand, so that the pressure in the second rear cavity 52 and the first rear cavity 51 is increased, the through hole 13 is communicated with the second rear cavity 52 and the front sound cavity 40, the leakage hole 21 is communicated with the first rear cavity 51 and the second rear cavity 52, so that the pressure difference between the front sound cavity 40 and the rear cavity 50 can be balanced, the vibrating diaphragm 3 is prevented from moving under the pressure of gas in the second rear cavity 52, the vibration quantity of the vibrating diaphragm 3 is ensured, and the acoustic performance of the loudspeaker box 100 is improved.

Compared with the prior art, in the speaker box 100 provided by the invention, the through hole 13 for communicating the front acoustic cavity 40 with the second rear cavity 52 is arranged on the upper cover 1, and the basin frame 2 is provided with the leakage hole 21 for communicating the first rear cavity 51 with the second rear cavity 52, so that the front acoustic cavity 40, the second rear cavity 52 and the first rear cavity 51 are sequentially communicated, the air pressure in the front acoustic cavity 40 and the rear cavity 50 can be kept in a balanced state, the gas in the rear cavity 50 is prevented from expanding and extruding the diaphragm 3 to move, the vibration quantity of the diaphragm 3 is ensured, the acoustic performance of the speaker box 100 is improved, and meanwhile, the through hole 13 is completely covered by the air permeable member 4, so that the waterproof performance of the speaker box 100 can be improved.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A loudspeaker box comprises an upper shell, a lower shell and a loudspeaker monomer, wherein the lower shell is matched with the upper shell to form an accommodating space, the loudspeaker monomer is accommodated in the accommodating space and comprises a vibrating diaphragm used for vibrating and sounding and an upper cover arranged between the vibrating diaphragm and the upper shell, the upper cover and the vibrating diaphragm form a front sound cavity, the lower shell, the upper cover and the vibrating diaphragm are matched to form a rear cavity, the rear cavity comprises a first rear cavity arranged in the loudspeaker monomer and a second rear cavity which is positioned outside the loudspeaker monomer and communicated with the first rear cavity, the loudspeaker box is characterized in that a through hole for communicating the front sound cavity with the second rear cavity is arranged on the upper cover, the loudspeaker monomer further comprises a basin frame fixedly connected with the upper cover, the upper cover comprises a top wall arranged at an interval parallel to the vibrating diaphragm and a side wall extending from the edge of the top wall to the direction close to the basin frame, the side wall with basin frame fixed connection, the edge clamp of vibrating diaphragm is located the side wall with between the basin frame, the through hole set up in the side wall.

2. The speaker box as claimed in claim 1, wherein the speaker unit further includes an air permeable member fixedly connected to the upper cover, the air permeable member completely covering the through hole.

3. A loudspeaker enclosure according to claim 2, wherein the air permeable member is an air permeable waterproof membrane.

4. The loudspeaker box of claim 2, wherein the frame defines a leak hole, the leak hole communicating the first back chamber with the second back chamber.

5. The speaker box of claim 2, wherein the sidewall includes an inner surface adjacent to the receiving space and an outer surface opposite to the inner surface, the outer surface is recessed toward the inner surface to form a groove, and the through hole is communicated with the groove.

6. A loudspeaker enclosure according to claim 5, wherein the air permeable member is received in the recess and the thickness of the air permeable member is less than or equal to the depth of the recess.

7. The speaker box as claimed in claim 6, wherein the air permeable member includes two parallel fixing portions spaced apart from each other and a connecting portion connecting the two fixing portions, the fixing portions and the connecting portion are integrally formed, the fixing portions are fixedly connected to the side walls, the connecting portion and the fixing portions cooperate to form a gap, and the gap is opposite to the through hole.

8. The speaker box according to claim 1, wherein the number of the through-holes is plural, and the plural through-holes are sequentially provided at intervals.