CN112261554A

CN112261554A - Speaker device and mobile terminal having the same

Info

Publication number: CN112261554A
Application number: CN201910662650.5A
Authority: CN
Inventors: 黄兴志; 柳林; 童迪江; 张哲�; 吴军; 陈志臣; 印兆宇
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2021-01-22
Also published as: WO2021012230A1

Abstract

The invention provides a loudspeaker device and a mobile terminal thereof. The speaker apparatus includes a speaker box, a heat generating element, and a heat conductive member. The loudspeaker box comprises a shell with an accommodating space and a sound production monomer with a vibrating diaphragm, wherein the sound production monomer is accommodated in the accommodating space of the shell, the vibrating diaphragm and the shell are arranged at intervals to form a front sound cavity, the loudspeaker box further comprises a sound outlet channel which is communicated with the front sound cavity and the outside, and the front sound cavity and the sound outlet channel jointly form a front cavity. The heat conducting member includes a first end portion connected to the heat generating element, a second end portion, and a connecting portion connecting the first end portion and the second end portion; the second end portion is integrally injection-molded with the housing and partially extends into the front cavity. According to the invention, the heating element at one end of the heat conducting piece is connected, and the other end of the heat conducting piece and the shell are integrally injection-molded and partially inserted into the front cavity, so that the heat dissipation of the heating element is realized through the air cooling effect formed by air flow in the front cavity.

Description

Speaker device and mobile terminal having the same

[ technical field ] A method for producing a semiconductor device

The invention relates to a heat dissipation technology of a mobile terminal, in particular to a loudspeaker device with a heat dissipation function and a mobile terminal with the loudspeaker device.

[ background of the invention ]

With the development of mobile terminals, the number of components included therein is increasing, and the problem of heat dissipation is becoming more and more severe.

In the related art, the heat dissipation of the mobile terminal is realized by closely attaching the input end of the heat pipe to the heating element and embedding the condensation end in the aluminum alloy middle frame of the mobile terminal. The hollow heat pipe is filled with liquid, heat enters from the input end, the liquid at the input end is heated and evaporated, and the liquid passes through the condensing end with lower temperature from the hollow heat pipe to be gradually cooled, and is changed into liquid again from steam. This process is repeated constantly, gives the large tracts of land aluminum alloy center radiator with the heat that heating element produced fast transfer to carry out quick effectual heat dissipation. However, the structure for dissipating heat in this way is complicated and the heat dissipation efficiency is low.

Therefore, a new speaker device must be provided to solve the above technical problems.

[ summary of the invention ]

The invention aims to provide a speaker device capable of dissipating heat and a mobile terminal with the speaker device.

In order to achieve the above object, the present invention provides a speaker device, which includes a speaker box, a heating element, and a heat conducting member connecting the speaker box and the heating element, wherein the speaker box includes a housing having an accommodating space and a sound generating unit accommodated in the accommodating space of the housing, the sound generating unit includes a vibrating diaphragm for generating sound by vibration, the vibrating diaphragm and the housing are arranged at an interval to form a front sound cavity, the speaker box further includes a sound emitting channel communicating the front sound cavity with the outside, the front sound cavity and the sound emitting channel together form the front cavity, wherein the heat conducting member includes a first end connected to the heating element, a second end connected to the housing, and a connecting portion connecting the first end and the second end; the second end is injection molded integrally with the housing, the second end portion extending into the front cavity.

Preferably, the second end portion includes a heat dissipation portion, and a first positioning portion and a second positioning portion respectively located on two opposite sides of the heat dissipation portion, and the heat dissipation portion is disposed opposite to the diaphragm.

Preferably, the first positioning portion and the second positioning portion are provided with positioning holes, and the positioning holes are located in the rear cavity.

Preferably, the housing includes an upper cover and a lower cover assembled with the upper cover to form the accommodating space, the upper cover includes a top wall facing the diaphragm and a side wall extending along the top wall in a bending manner, and the heat dissipation portion is disposed on one side of the top wall close to the diaphragm.

Preferably, the housing further includes an annular step portion formed to extend from the top wall toward the lower cover, the speaker unit being supported by the annular step portion, the annular step portion dividing the top wall into a first region and a second region surrounding the first region, the positioning hole being located in the second region, and the heat dissipation portion being located in the first region.

Preferably, the heat conducting member is a hollow tube.

The invention also provides a mobile terminal which comprises a shell, wherein the shell is provided with a sound outlet communicated with the outside, the mobile terminal also comprises the loudspeaker device, the loudspeaker box and the heating element are arranged on the shell at intervals, and the sound outlet channel is communicated with the outside through the sound outlet.

Preferably, the heat generating element is one or both of a processor and a battery of the mobile terminal.

Compared with the prior art, the heat conducting part is arranged, one end of the heat conducting part is connected with the heating element of the mobile terminal, the other end of the heat conducting part and the shell of the loudspeaker box are integrally molded in an injection mode and partially inserted into the front cavity of the loudspeaker box, and therefore heat conducted out by the heat conducting part is discharged through the air cooling effect formed by vibration of the vibrating diaphragm in the loudspeaker box, particularly vibration of the vibrating diaphragm at low frequency and pushing air flow in the front cavity. By adopting the mode, the heat dissipation of the mobile terminal can be realized by adopting a simple structure, and the heat dissipation efficiency is high.

[ 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 a schematic perspective view of a mobile terminal according to the present invention;

fig. 2 is a schematic perspective view of the speaker device (not including a heat generating element) shown in fig. 1;

fig. 3 is an exploded perspective view of the speaker device shown in fig. 2;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 5 is a perspective view of the combination of the upper cover and the heat-conducting member shown in FIG. 2;

fig. 6 is a sectional view taken along line B-B in fig. 2.

[ 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, a mobile terminal 100 according to the present invention includes a housing 10, a heating element 20 and a speaker box 30 mounted on the housing 10, and a heat conducting member 40 connecting the speaker box 30 and the heating element 20. The heat-conducting member 40 is used to conduct the heat generated by the heating element 20 to the speaker box 30, and to the outside air through the speaker box 30. The housing 10 may be a rear cover of the mobile terminal 100, and the housing 10 is provided with a sound outlet 101 for outputting sound emitted from the speaker box 30 to the outside. The heat generating element 20 may be an element that generates heat from a processor, a battery, etc. of the mobile terminal 100. In the present embodiment, the heating element 20, the speaker box 30, and the heat conductive member 40 together constitute the speaker device 200.

The speaker box 30 includes a housing 3, and the housing 3 includes an upper cover 31, a lower cover 32 assembled with the upper cover 31 to form a receiving space 300, and a sound generating unit 33 received in the receiving space 300. The upper cover 31 and the lower cover 32 may be an integral structure or a separate structure.

The sounding monomer 33 and the upper cover 31 are arranged at intervals and jointly enclose to form a front sounding cavity 34; the sound generating unit 33, the upper cover 31 and the lower cover 32 jointly enclose a rear cavity 35.

The speaker box 30 further includes a sound outlet channel 36 communicating with the outside, the sound outlet channel 36 communicating with the front sound chamber 34 to form a front chamber 37. In the present embodiment, the sound emitting passage 36 is formed in the upper cover 31. The sound outlet passage 36 communicates with the outside through the sound outlet 101.

That is, in the present embodiment, the sound generating unit 33 divides the accommodating space 300 into a front cavity 37 and the rear cavity 35, wherein the front cavity 37 includes the front sound cavity 34 and the sound outlet channel 36 for outputting sound; the back volume 35 is used to improve the low frequency acoustic performance of the loudspeaker enclosure 30.

Specifically, the sound generating unit 33 further includes a diaphragm 331, and the diaphragm 331 is spaced apart from the upper cover 31 to form the front sound cavity 34. The diaphragm 331 inputs a low-frequency (lower than 1000Hz) pulse signal to drive the loudspeaker diaphragm to vibrate, and the air in the front cavity is pushed to flow to form an air cooling effect. The pulse signal can be played independently when the loudspeaker does not execute the music playing task; the pulse signal may be superimposed into the music signal while performing a music play task. Because the signal is an ultra-low frequency pulse signal, the signal can not be heard by human ears and the normal listening effect is not influenced.

The upper cover 31 includes a top wall 311 having a substantially flat plate shape and a side wall 312 formed by bending and extending along an edge of the top wall 311. The side wall 312 is disposed around the top wall 311. The sound outlet channel 36 is formed on the side wall 312.

The upper cover 31 further includes an annular step portion 313 formed extending from the top wall 311 toward the lower cover. The annular step portion 313 divides the top wall 311 into a first region 311a and a second region 311b surrounding the first region 311 a. The sounding unit 33 is fixed on the annular step portion 313, and specifically, the diaphragm 331, the annular step portion 313 and the first region 311a enclosed by the annular step portion 313 together enclose the front sound cavity 34. The annular step portion 313, the second region 311b, the side wall 312, and the lower cover 32 together enclose the rear cavity 35.

The heat-conducting member 40 is substantially in the form of a hollow pipe made of a heat-conducting material such as copper. In an alternative embodiment, the thermally conductive member is a solid member. The heat conductive member 40 includes a first end portion 401 connected to the heat generating element 20 for collecting heat generated from the heat generating element 20, a second end portion 402 connected to the case 3 of the speaker box 30, and a connection portion 403 connecting the first end portion 401 and the second end portion 402. The connection 403 is used to transfer the heat collected by the first end 401 to the second end 402, and the second end 402 is used to transfer the heat to the outside air. The second end 402 is injection molded integrally with the housing 3. Specifically, in the present embodiment, the second end 402 is integrally injection-molded with the upper cover 31. And the second end portion 402 partially extends into the front cavity 37, so that the vibration of the diaphragm pushes the air flow in the front cavity to form an air cooling effect, and the heat transmitted by the second end portion 402 is dissipated through the sound outlet 101.

Preferably, in the present embodiment, the second end portion 402 includes a heat dissipation portion 402a and a first positioning portion 402b and a second positioning portion 402c respectively located at both sides of the heat dissipation portion 402 a. The first positioning portion 402b is connected between the heat dissipation portion 402a and the connection portion 403, and the second positioning portion 402c extends outward from the heat dissipation portion 402 a. Preferably, the heat dissipation part 402a is disposed in the first region 311a of the top wall 311, near one side of the diaphragm 331, and is disposed opposite to the diaphragm 331. It is understood that the heat dissipation portion 402a may also be disposed on the sidewall of the sound emitting channel 36 and located in the sound emitting channel 36.

The first positioning portion 402b and the second positioning portion 402c are respectively provided with a positioning hole 4020, and the positioning hole 4020 is used for positioning in the injection molding process so as to be better connected with the upper cover 31. The first positioning portion 402b and the second positioning portion 402c are both located in the second region 311b, i.e., in the rear cavity 35.

Compared with the prior art, the heat conducting part is arranged, one end of the heat conducting part is connected with the heating element of the mobile terminal, the other end of the heat conducting part and the shell of the loudspeaker box are integrally molded in an injection mode and partially inserted into the front cavity of the loudspeaker box, and therefore heat conducted out of the heat conducting part is discharged through the sound outlet through the vibrating diaphragm in the loudspeaker box, particularly the air cooling effect formed by air flowing in the front cavity under the low-frequency vibration pushing effect. By adopting the mode, the heat dissipation of the mobile terminal can be realized by adopting a simple structure, and the heat dissipation efficiency is high.

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 device comprises a loudspeaker box, a heating element and a heat conducting piece for connecting the loudspeaker box and the heating element, wherein the loudspeaker box comprises a shell with an accommodating space and a sound generating single body accommodated in the accommodating space of the shell, the sound generating single body comprises a vibrating diaphragm for vibrating and generating sound, the vibrating diaphragm and the shell are arranged at intervals to form a front sound cavity, the loudspeaker box further comprises a sound emitting channel for communicating the front sound cavity with the outside, and the front sound cavity and the sound emitting channel jointly form the front cavity; the second end is injection molded integrally with the housing, the second end portion extending into the front cavity.

2. The speaker device of claim 1, wherein the second end portion includes a heat dissipating portion and a first positioning portion and a second positioning portion respectively located on opposite sides of the heat dissipating portion, and the heat dissipating portion is disposed opposite to the diaphragm.

3. The speaker device according to claim 2, wherein positioning holes are formed in the first positioning portion and the second positioning portion, and the positioning holes are located in the rear cavity.

4. The speaker device according to claim 3, wherein the housing includes an upper cover and a lower cover assembled with the upper cover to form the receiving space, the upper cover includes a top wall disposed opposite to the diaphragm and a side wall extending along the top wall, and the heat dissipation portion is disposed on a side of the top wall close to the diaphragm.

5. The speaker device according to claim 4, wherein the housing further includes an annular step portion formed extending from the top wall toward the lower cover, the speaker unit being supported by the annular step portion, the annular step portion dividing the top wall into a first region and a second region surrounding the first region, the positioning hole being located in the second region, and the heat dissipation portion being located in the first region.

6. The speaker device of claim 1 wherein the thermally conductive member is a hollow tube.

7. A mobile terminal comprising a housing, wherein the housing is provided with a sound outlet communicated with the outside, the mobile terminal further comprising a speaker device according to any one of claims 1 to 6, wherein the speaker box and the heating element are mounted on the housing at intervals, and the sound outlet channel is communicated with the outside through the sound outlet.

8. The mobile terminal of claim 7, wherein the heat generating component is one or both of a processor and a battery of the mobile terminal.