WO2020258229A1

WO2020258229A1 - Speaker case

Info

Publication number: WO2020258229A1
Application number: PCT/CN2019/093613
Authority: WO
Inventors: 陈志臣; 蔡斌
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-12-30
Also published as: CN210168216U

Abstract

The present invention relates to the technical field of sound generation components, and provided in the invention is a speaker case. The speaker case comprises a cover that circles to form an accommodating space, and a speaker unit and a sound absorbing block accommodated in the accommodating space. The sound absorbing block is formed from composite material layers stacked together. A plurality of protruding columns arranged at intervals are provided on the cover, extending towards the accommodating space and positioned between the speaker unit and the sound absorbing block, and the sound absorbing block is limited to within a sound absorption chamber formed by the protruding columns and the cover. In the present invention, the sound absorbing block can be limited to within the sound absorption chamber by means of the protruding columns, thus effectively achieving the acoustic effect of the speaker case and causing the acoustic performance thereof to be stable.

Description

Speaker box

Technical field

The invention relates to the technical field of sound emitting devices, in particular to a speaker box.

Background technique

The speaker box is an important acoustic component of portable electronic equipment to complete the conversion between electrical signals and sound signals. As the volume of the cavity of the speaker box becomes smaller and smaller, in order to enable the speaker to exert good performance, reduce the resonance frequency of the module, and improve the sound quality, technicians usually add sound-absorbing materials in the sound-absorbing cavity to absorb some Acoustic energy, so as to achieve the effect of reducing the resonance frequency of the module.

The sound-absorbing materials used in the prior art speaker boxes mainly include sound-absorbing cotton foamed block materials and powdered granular materials. A new type of sound-absorbing material has been developed subsequently. Its structure is soft and easily deformed, which makes it not sound-absorbing. The cotton itself is stable in shape. It only needs to be die-cut and mounted without packaging, and it cannot be like powder particles. The powder is filled into the sound-absorbing cavity by using the sound-absorbing cavity enclosed by the insert plate with a grid structure and the side wall of the cover plate. . Therefore, it is necessary to provide a speaker box with a new positioning structure to encapsulate such soft and easily deformable sound-absorbing materials, so as to achieve stable acoustic performance.

technical problem

The purpose of the present invention is to provide a loudspeaker box, which aims to solve the problem that a new type of soft and deformable sound-absorbing material cannot be well encapsulated in the prior art loudspeaker box, which affects the stability of acoustic performance.

Technical solutions

The present invention provides a loudspeaker box, which includes a cover enclosing a receiving space, and a speaker unit and a sound-absorbing block contained in the receiving space. The sound-absorbing block is formed by stacking a plurality of composite materials. The cover There are a number of protrusions extending toward the accommodating space and located at intervals between the speaker unit and the sound-absorbing block, and the sound-absorbing block is limited to the sound-absorbing formed by the protrusion and the cover. Cavity.

Further, each composite material layer is provided with a number of sub-micron holes.

Further, the composite material layer is made of Teflon material.

Further, the cover body includes an upper cover and a lower cover that are opposed to each other to form the accommodating space, the lower cover includes a base, and an edge of the base extends along a side close to the upper cover to enclose the accommodating space The side wall, the protruding column, the side wall and the base jointly enclose the sound-absorbing cavity.

Further, the protruding post is fixed on the base, and the protruding post extends toward the upper cover.

Further, the protruding post and the base are integrally formed.

Further, the protruding post includes a first wall portion that abuts against the sound-absorbing block together with the side wall, and a second wall portion disposed opposite to the first wall portion and spaced apart from the speaker unit.

Further, the width of the end of the first wall portion close to the base is greater than the width of the end of the first wall portion away from the base.

Further, a plurality of blocks extending from the base to contact the sound-absorbing block are arranged in the sound-absorbing cavity.

Further, the speaker unit divides the housing space into a front cavity and a back cavity opposite to the front cavity, a circulation channel is formed between adjacent protrusions, and the back cavity and the sound-absorbing cavity pass through the The circulation channel is connected.

Beneficial effect

The speaker box of the present invention is provided with spaced protrusions in the accommodating space. The protrusions and the cover confine the sound-absorbing block formed by stacking composite materials in the sound-absorbing cavity formed by the protrusions and the cover to utilize the protrusions. Together with the cover, it defines the position of the sound-absorbing block, which effectively exerts the acoustic effect of the speaker and stabilizes the acoustic performance.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of a speaker box according to an embodiment of the present invention;

2 is a schematic diagram of an exploded structure of a speaker box according to an embodiment of the present invention;

Fig. 3 is a schematic sectional view of the structure taken along the A-A direction in Fig. 1;

FIG. 4 is a schematic diagram of the enlarged structure of area B in FIG. 3;

Figure 5 is a schematic diagram of the lower cover structure in Figure 2;

FIG. 6 is a schematic diagram of the enlarged structure of the C area in FIG. 5.

Embodiments of the invention

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

Refer to Figures 1 to 4, which show a speaker box provided by an embodiment of the present invention. The speaker box includes a cover 1 enclosing a containing space 2 and a speaker unit 3 and a sound-absorbing block 4 contained in the containing space 2. The sound-absorbing block 4 is formed by stacking a number of composite materials, and each composite material layer is provided There are several sub-micron holes. The composite material layer is made of Teflon material. Teflon is biaxially stretched polytetrafluoroethylene, which is made of polytetrafluoroethylene microporous film laminated with ordinary fabric through a special process As a result, the sound-absorbing block 4 made of Teflon material has the characteristics of elasticity, softness and deformation, fragility, non-stickiness, and sliding properties. The cover 1 is provided with a number of protrusions 5 extending into the containing space 2 and located at intervals between the speaker unit 3 and the sound-absorbing block 4, and the sound-absorbing block 4 is limited to the sound-absorbing cavity formed by the protrusions 5 and the cover 1 In 6, the position of the sound-absorbing block 4 is defined by the abutment of the protrusion 5.

In the above-mentioned embodiment, the cover 1 includes an upper cover 11 and a lower cover 12 that are disposed opposite to each other to form a receiving space 2. The lower cover 12 includes a base 121 and an edge of the base 121 that extends along the side close to the upper cover 11 to form the receiving space 2. The side wall 122, the protruding column 5, the side wall 122 and the base 121 collectively enclose the aforementioned sound-absorbing cavity 6. The sound-absorbing block 4 is located between the side wall 122 and the protruding column 5, and defines the sound-absorbing block 4 in the sound-absorbing cavity 6, using the upper cover 11 and the lower cover 12 are mutually covered, and the sound-absorbing block 4 is stably enclosed in the sound-absorbing cavity 6.

Please refer to FIGS. 4 to 6 together. In this embodiment, the limiting block 5 is fixed on the base 121. The 5 protruding pillars are formed by extending toward the upper cover 11 and perpendicular to the base 121. The protruding pillars 5 and The base 121 is integrally formed to ensure the stability of the protrusion 5. Specifically, the stud 5 includes a first wall portion 51 that abuts against the sound-absorbing block 4 together with the side wall 122 and a second wall portion 52 that is disposed opposite to the first wall portion 51 and spaced apart from the speaker unit 3. The first wall 51 and the sound absorbing block 4 are closely matched to limit the position of the sound absorbing block 4, and the second wall 52 and the speaker unit 3 are spaced apart from each other to ensure good ventilation. In this embodiment, the width of the end of the first wall 51 close to the base 121 is greater than the width of the end of the first wall 51 away from the base 121, and the protrusion 5 is trapezoidal to increase the contact area between the lower end of the protrusion 5 and the sound-absorbing block 4 In addition, a number of blocks 1211 extending from the base 121 to contact the sound-absorbing block 4 are provided in the sound-absorbing cavity 6 containing the sound-absorbing block 4 to increase the contact area between the base 121 and the sound-absorbing block 4 and enhance the limitation effect. In other embodiments, the protrusion 5 may also be fixed on the side of the side wall 122 close to the storage space 2 and be integrally formed with the side wall 122 as long as it can be used to limit the sound-absorbing block 4.

In the above embodiment, the speaker unit 3 divides the accommodating space 2 into a front cavity 21 and a rear cavity 22 opposite to the front cavity 21. Among the several spaced protrusions 5, a circulation channel 50 is formed between adjacent protrusions 5, The rear cavity 22 and the sound-absorbing cavity 6 are communicated through a circulation channel 50, and the several spaced protrusions 5 are arranged in a line to form a fence-like structure, which facilitates the passage of airflow through the circulation channel 50 between the protrusions 5, and has good ventilation. At the same time, the space occupied by the containing space 10 can be reduced.

In summary, the speaker box of the present invention is provided with a protrusion 5 in the containing space 2 enclosed by the upper cover 11 and the lower cover 12, so that the protrusion 5, the base 121 and the side wall 122 of the lower cover 12 together form a sound absorption Cavity 6, the sound-absorbing block 4 is placed in the sound-absorbing cavity 6, the position of the sound-absorbing block 4 is defined by the protrusion 5 and the side wall 122 together, and the sound-absorbing block 4 is confined and sealed in the sound-absorbing cavity 6 by assembling the upper cover 11 and the lower cover 12 , Can effectively play the acoustic effect of the speaker box, so that the acoustic performance is stable.

The above are only the embodiments of the present invention. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these all belong to the present invention. The scope of protection.

Claims

A speaker box comprising a cover enclosing a containing space, a speaker unit and a sound-absorbing block contained in the containing space, wherein the sound-absorbing block is formed by stacking a plurality of composite materials, and the cover The body is provided with a number of protrusions extending toward the receiving space and located at intervals between the speaker unit and the sound-absorbing block, and the sound-absorbing block is limited to the protrusion formed by the protrusion and the cover. In the sound-absorbing cavity.
The speaker box according to claim 1, wherein each composite material layer is provided with a plurality of sub-micron holes.
The speaker box according to claim 1, wherein the composite material layer is made of Teflon material.
The speaker box according to claim 1, wherein the cover includes an upper cover and a lower cover that are opposed to each other to form the accommodating space, the lower cover includes a base and an edge of the base close to the upper A side wall enclosing the containing space extends from one side of the cover, and the protruding column, the side wall and the base jointly enclose the sound-absorbing cavity.
The speaker box according to claim 4, wherein the protrusion is fixed on the base, and the protrusion is formed by extending in a direction close to the upper cover.
The speaker box according to claim 5, wherein the protrusion and the base are integrally formed.
The loudspeaker box according to claim 4, wherein the protruding post comprises a first wall portion that abuts against the sound-absorbing block together with the side wall, and is arranged opposite to the first wall portion and is connected to the The second wall part of the speaker unit spaced apart.
The speaker box according to claim 7, wherein the width of an end of the first wall portion close to the base is greater than a width of an end of the first wall portion away from the base.
The loudspeaker box according to claim 4, wherein a plurality of blocks extending from the base to contact the sound-absorbing block are arranged in the sound-absorbing cavity.
The speaker box according to claim 1, wherein the speaker unit divides the receiving space into a front cavity and a rear cavity opposite to the front cavity, and a circulation channel is formed between adjacent protrusions , The rear cavity and the sound absorption cavity are communicated through the circulation channel.