WO2020133320A1

WO2020133320A1 - Speaker

Info

Publication number: WO2020133320A1
Application number: PCT/CN2018/125243
Authority: WO
Inventors: 王延隆
Original assignee: 瑞声声学科技(深圳)有限公司
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2020-07-02

Abstract

Disclosed is a speaker comprising: an upper housing; a lower housing that defines an accommodation space together with the upper housing; and a speaker unit accommodated within the accommodation space. The speaker unit comprises a diaphragm. The upper housing comprises a top wall, a side wall extending from the top wall in a direction towards the housing, and a blocking wall extending from the top wall in a direction away from the top wall and provided spaced apart from the side wall, wherein the blocking wall, the side wall and the top wall define an accommodation portion that accommodates the speaker unit. A ventilation separator is disposed on an end of the top wall. A first sound-absorbing cavity that accommodates a sound-absorbing material is separately formed between the lower housing and the ventilation separator. A side of the blocking wall away from the speaker unit, the side wall and the lower housing define a second sound-absorbing cavity that accommodates the sound-absorbing material. The first sound-absorbing cavity is in communication with the second sound-absorbing cavity. In the speaker of the invention, a powder filling space is enlarged, improving the acoustic effect of the speaker.

Description

speaker

【Technical field】

The invention relates to the field of sound and electricity, in particular to a speaker applied to portable electronic products.

【Background technique】

In the rapid development of mobile devices (such as mobile phones, tablets or laptops), people have increasingly higher requirements for product functions. In order to make entertainment more prominent, speakers are also increasingly using speakers in combination with cabinets Structure to get a better low-frequency experience.

In order to obtain better acoustic effect, the speakers of the prior art are often filled with sound-absorbing material in the internal cavity, and then the sound-absorbing material is encapsulated with a breathable gauze, but the capacity of the internal cavity is often limited by its own cover The material and thickness of the board and the too small capacity limit the amount of sound-absorbing material that can be accommodated, which results in the speaker being unable to obtain better acoustic effects. Further, components such as breathable gauze used to encapsulate the sound-absorbing material are easily The shell falls off, causing the sound-absorbing material to enter the internal space of the speaker, thereby seriously affecting the acoustic performance of the speaker.

Therefore, it is necessary to provide a new structure to solve the above technical problems.

[Invention content]

The object of the present invention is to provide a loudspeaker that can greatly increase the size of the internal cavity and effectively prevent sound-absorbing materials from entering the internal space of the loudspeaker.

To solve the above technical problems, the technical solution of the present invention is:

A loudspeaker includes an upper housing, a lower housing that is combined with the upper housing to form an accommodation space, and a speaker unit accommodated in the accommodation space. The speaker unit includes a diaphragm and the vibration The membrane is spaced from the upper casing to form a front cavity. The upper casing includes a top wall opposed to the diaphragm and spaced apart, a side wall extending from the top wall in the direction of the casing, and a free space. The top wall extends away from the top wall and is spaced apart from the side wall. The wall, the side wall, and the top wall enclose an accommodating portion for accommodating the speaker unit. An end of the accommodating part away from the top wall is provided with an air-permeable partition, the air-permeable isolator encapsulates the speaker unit in the accommodating part, and the lower housing is spaced apart from the air-permeable isolator A first sound-absorbing cavity of sound-absorbing material, a side of the retaining wall away from the speaker unit, the side wall and the lower housing form a second sound-absorbing cavity for accommodating the sound-absorbing material, and the first sound-absorbing cavity The cavity is in communication with the second sound-absorbing cavity.

Preferably, the lower casing is provided with a filling hole corresponding to the first sound-absorbing cavity, and the sound-absorbing material is loaded into the first sound-absorbing cavity and the second sound-absorbing cavity through the filling hole.

Preferably, the lower casing is provided with a sealing sheet covering the filling hole.

Preferably, the lower case includes a bottom wall opposite to the top wall, a side plate extending from the bottom wall in a direction corresponding to the top wall, and a side wall extending from the bottom wall into the receiving space A retaining wall, the retaining wall corresponds to and welds to the retaining wall, the side plate corresponds to and welds to the side wall, and the air-permeable isolator is fixed to the retaining wall by heat fusion.

Preferably, the lower housing further includes a pressing portion extending from the bottom wall toward the speaker unit, and the air-permeable partition is fixed to the pressing portion.

Preferably, the loudspeaker further includes a buffer, the breathable spacer is fixed to the peripheral edge of the pressing portion and a hollowed portion is provided corresponding to the pressing portion, and the buffering member is disposed below the hollowed portion and resists the In the speaker unit, the pressing part partially passes through the hollowed part and presses against the buffer.

Preferably, the blocking wall is provided with a communication port, and the communication port communicates with the first sound-absorbing cavity and the second sound-absorbing cavity.

Preferably, the retaining wall and the retaining wall, and the side wall and the side plate are fixed by ultrasonic welding or laser welding.

Preferably, the bottom wall includes a plastic body and a metal plate embedded in the plastic body, and the metal plate and the plastic body are integrally formed by injection molding.

Preferably, the upper housing correspondingly opens a sound outlet communicating with the front cavity.

The beneficial effects of the speaker of the present invention: the speaker of the present invention can greatly increase the size of the internal cavity and effectively prevent the sound absorbing material from entering the internal space of the speaker, which effectively solves the problem of the existing speaker The volume of the cavity is too small, which limits the amount of sound-absorbing material it can contain, resulting in a technical problem that the speaker cannot obtain better acoustic effects.

[Description of the drawings]

1 is an exploded schematic diagram of the speaker provided by the present invention;

2 is a schematic structural diagram of an upper casing of a speaker provided by the present invention;

3 is a schematic structural diagram of a lower housing of a speaker provided by the present invention;

4 is a schematic diagram of the assembly of the speaker provided by the present invention;

5 is a cross-sectional view taken along line A-A of the speaker provided by the present invention;

6 is a cross-sectional view taken along line B-B of the speaker provided by the present invention.

Reference signs: 100, speaker; 11, upper case; 110, receiving part; 111, top wall; 112, side wall; 113, retaining wall; 114, second sound-absorbing cavity; 115, sound outlet; 116, front Cavity; 12, lower housing; 121, bottom wall; 1211, plastic body; 1212, metal plate; 122, side plate; 123, retaining wall; 124, first sound-absorbing cavity; 125, communication port; 126, mortgage; 127, filling hole; 128, sealing sheet; 13, speaker unit; 131, diaphragm; 14, breathable spacer; 15, buffer

【detailed description】

To further illustrate the various embodiments, the invention is provided with drawings. These drawings are part of the disclosure content of the present invention, which are mainly used to explain the embodiments, and can explain the operation principles of the embodiments in conjunction with the relevant description of the specification. With reference to these contents, those of ordinary skill in the art should be able to understand other possible embodiments and advantages of the present invention. The components in the figure are not drawn to scale, and similar component symbols are usually used to indicate similar components.

The present invention will be further described below with reference to the drawings and embodiments.

Referring to FIG. 1, a speaker 100 according to an embodiment of the present invention includes an upper housing 11, a lower housing 12 that is grouped with the upper housing 11 to form a receiving space, a speaker unit 13, and a ventilation spacer 14.

2, the upper housing 11 includes a top wall 111 and a side wall 112 extending from the top wall 111 toward the lower housing, and away from the top wall 111 from the top wall 111 A retaining wall 113 extending and spaced apart from the side wall 112, the top wall 111, the side wall 112, and the retaining wall 113 enclose an accommodating portion 110 for accommodating the speaker unit 13, and the retaining wall 113 is away from the A side of the speaker unit 13 surrounds the side wall 112 and the lower casing 12 to form a second sound absorbing cavity 114 for accommodating sound absorbing material. The top wall 111 of the upper casing 11 is correspondingly provided with a sound outlet 115.

Please refer to FIG. 5 together. The speaker unit 13 is accommodated in the accommodating portion 110. The speaker unit 13 includes a diaphragm 131 which is opposed to the top wall 111 of the upper housing 11 and spaced apart Cavity 116.

Referring to FIGS. 3 and 5, the lower housing 12 includes a bottom wall 121 opposite to the top wall 111 of the upper housing 11, and a side plate 122 extending from the bottom wall 121 toward the top wall 111. And a stop wall 123 extending from the bottom wall 121 to the receiving space, the stop wall 123 corresponds to the stop wall 113 and is welded, the side plate 122 corresponds to the side wall 112 and is welded, so The air-permeable partition 14 and the blocking wall 123 are hot-melted and fixed. The air-permeable partition 14 is spaced apart from the lower housing 12 to form a first sound-absorbing cavity 124 for accommodating sound-absorbing materials. The blocking wall 123 is provided with a communication port 125 The communication port 125 communicates with the first sound-absorbing cavity 124 and the second sound-absorbing cavity 114.

The lower housing 12 further includes a pressing portion 126 extending from the bottom wall 121 toward the speaker unit 13, and the air-permeable separator 14 is fixed to the pressing portion 126. Preferably, the bottom wall 121 includes a plastic body 1211 and a metal plate 1212 embedded in the plastic body 1211. The metal plate 1212 and the plastic body 1211 are integrally injection molded by insert molding technology. , The lower casing 12 is provided with a filling hole 127 corresponding to the first sound-absorbing cavity 124, and the sound-absorbing material is loaded into the first sound-absorbing cavity 124 and the second sound-absorbing through the filling hole 127 In the cavity 114, a sealing sheet 128 covering the filling hole 127 is further provided on the lower housing 12.

5 and FIG. 6 together, the speaker 100 further includes a buffer member 15 that encapsulates the speaker unit 13 in the receiving portion 110, and the breathable spacer 14 corresponds to the The periphery of the pressing portion 126 is fixed and is provided with a hollow portion corresponding to the pressing portion 126, the buffer member 15 is disposed below the hollow portion and bears against the speaker unit 13, and the pressing portion 126 is partially After passing through the hollowed part, it is pressed against the buffer 15.

Understandably, there may not be a hollow part in the middle of the air-permeable separator 14, and the buffer member 15 is directly attached to the upper or lower side of the air-permeable separator 14 for elastically abutting the lower housing 12 and the The speaker unit 13 described above.

During installation, the air-permeable isolator 14 is fixed to the retaining wall 123 of the lower housing 12, the upper surface of the hollowed-out part of the air-permeable isolator 14 is fixed to the periphery of the pressing portion 126, and the buffer 15 is fixedly attached below the hollowed-out part of the air-permeable isolator 14, the speaker unit 13 is installed in the receiving space 110 of the upper housing 11, the retaining wall 113 of the upper housing 11 and the lower The baffle wall 123 of the casing 12 and the side wall 112 of the upper casing 11 and the side plate 122 of the lower casing 12 are fixed by ultrasonic welding or laser welding, thereby fixing the upper casing 11 and the lower壳12。 The housing 12. Through the filling hole 127 of the lower casing 12, a sound-absorbing powder material is injected to fill the first sound-absorbing cavity 124 and the second sound-absorbing cavity 114. After the powder filling is completed, the sealing sheet 128 seals the place述填装孔127.

Compared with the prior art, the loudspeaker 100 provided by the present invention has a space for filling sound-absorbing powder material including a first sound-absorbing cavity 124 enclosed by the air-permeable partition 14 and the lower housing 12 and provided in the upper housing 11 The second sound-absorbing cavity 114 on the top is in communication with the first sound-absorbing cavity 124, which effectively increases the powder filling space of the speaker and improves the acoustic effect of the speaker.

The above are only the embodiments of the present invention. It should be pointed out that those of ordinary skill in the art can make improvements without departing from the inventive concept of the present invention, but these belong to the present invention. protected range.

Claims

A loudspeaker includes an upper housing, a lower housing that is combined with the upper housing to form an accommodation space, and a speaker unit accommodated in the accommodation space, the speaker unit includes a diaphragm, the vibration The membrane is spaced from the upper casing to form a front cavity, characterized in that the upper casing includes a top wall opposed to the diaphragm and spaced apart, and a side extending from the top wall toward the lower casing A wall and a retaining wall extending away from the top wall and spaced apart from the side wall, the retaining wall, the side wall, and the top wall enclose the speaker unit The receiving part of the receiving part, which is away from the top wall, is provided with a breathable separator, the breathable separator encapsulates the speaker unit in the receiving part, the lower case and the breathable separator A first sound-absorbing cavity for accommodating sound-absorbing material is formed at intervals, and a side of the blocking wall away from the speaker unit, the side wall and the lower housing form a second sound-absorbing cavity for accommodating the sound-absorbing material, The first sound-absorbing cavity and the second sound-absorbing cavity are in communication.
The loudspeaker according to claim 1, wherein the lower casing is provided with a filling hole at a position corresponding to the first sound-absorbing cavity, and the sound-absorbing material is loaded into the first sound-absorbing through the filling hole Cavity and the second sound-absorbing cavity.
The speaker according to claim 2, wherein the lower casing is provided with a sealing sheet covering the filling hole.
The speaker according to claim 1, wherein the lower housing includes a bottom wall opposite to the top wall, a side plate extending from the bottom wall in a direction corresponding to the top wall, and from the The bottom wall extends to the retaining wall in the receiving space, the retaining wall corresponds to and welds to the retaining wall, the side plate corresponds to and welds to the side wall, and the air-permeable isolator and the retaining wall are hot Melt fixed.
The speaker according to claim 4, wherein the lower case further includes a pressing portion extending from the bottom wall toward the speaker unit, and the air-permeable spacer is fixed to the pressing portion.
The loudspeaker according to claim 5, wherein the loudspeaker further comprises a cushioning member, the breathable spacer is fixed to the periphery of the pressing portion and a hollowed portion is provided corresponding to the pressing portion, and the cushioning member is provided at The lower part of the hollow part is pressed against the loudspeaker monomer, and the pressing part partially passes through the hollow part and presses against the buffer.
The speaker according to claim 4, wherein the blocking wall is provided with a communication port, and the communication port communicates with the first sound-absorbing cavity and the second sound-absorbing cavity.
The speaker according to claim 4, wherein the blocking wall and the blocking wall, and the side wall and the side plate are fixed by ultrasonic welding or laser welding.
The speaker according to claim 4, wherein the bottom wall includes a plastic body and a metal plate embedded in the plastic body, and the metal plate and the plastic body are integrally formed by injection molding.
The loudspeaker according to claim 1, wherein the upper housing correspondingly defines a sound outlet communicating with the front cavity.