WO2021128012A1

WO2021128012A1 - Loudspeaker box

Info

Publication number: WO2021128012A1
Application number: PCT/CN2019/128012
Authority: WO
Inventors: 印兆宇
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: 2019-12-24
Filing date: 2019-12-24
Publication date: 2021-07-01

Abstract

Provided is a loudspeaker box. The loudspeaker box comprises a lower cover, an upper cover, a sound production unit and a breathable isolation assembly, wherein the sound production unit and the upper cover are spaced such that same enclose to form a front cavity, and the sound production unit, the upper cover and the lower cover together enclose to form a rear cavity; the breathable isolation assembly partitions the rear cavity into a first rear cavity and a second rear cavity which are in air communication with each other, and at least part of the sound production unit is located in the first rear cavity; the breathable isolation assembly and the lower cover are spaced such that same enclose to form the second rear cavity, the second rear cavity is filled with sound absorption particles, and the breathable isolation assembly packages the sound absorption particles in the second rear cavity; the breathable isolation assembly comprises a breathable isolation member, a first reinforcing ring and a second reinforcing ring; and the first reinforcing ring is connected to the lower cover, the breathable isolation member is provided with a filling hole which penetrates same, and the second reinforcing ring is provided to surround the filling hole. The loudspeaker box further comprises a sealing cover for sealing the filling hole. Compared with related technology, the loudspeaker box in the present utility model is high in terms of assembly efficiency and good in terms of low-frequency acoustic performance.

Description

Speaker box

Technical field

The utility model relates to the technical field of an electro-acoustic conversion device, in particular to a speaker box.

Background technique

With the advent of the mobile Internet era, the number of smart mobile devices continues to rise. Among many mobile devices, mobile phones are undoubtedly the most common and most portable mobile terminal devices. At present, the functions of mobile phones are extremely diverse, one of which is high-quality music functions. Therefore, speaker boxes for playing sound are widely used in today's smart mobile devices.

The speaker box of the related art includes an upper cover, a lower cover assembled with the upper cover to form an accommodating space, a sounding monomer and a ventilating partition accommodated in the accommodating space; the sounding monomer and the upper cover The sounding monomer, the upper cover, and the lower cover jointly enclose a rear cavity; the air-permeable spacer is located on the side of the sounding monomer away from the front cavity, and connects the rear cavity Separate into a first back cavity and a second back cavity that are in air communication with each other, the sound-producing monomer is at least partially located in the first back cavity, and the air-permeable spacer is fixed to the lower cover and formed spaced apart from the lower cover In the second rear cavity, a sinking platform is formed and a through hole penetrating the sinking platform is formed by recessing the position of the lower cover facing the sound-producing monomer, and then filling the second rear cavity with sound-absorbing particles through the through hole, The air-permeable spacer encapsulates the sound-absorbing particles in the second rear cavity, thereby improving the low-frequency acoustic performance of the speaker box.

technical problem

However, in the speaker box of the related art, the depth of the sinking platform is generally 0.25mm, which is used to accommodate the cover plate that seals the through hole, and the position of the lower cover corresponding to the through hole forms a powder filling channel between the air-permeable spacer. The height of the powder filling channel is reduced due to the setting of the sinker, so that the powder filling efficiency is low, and even powder filling is impossible.

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

Technical solutions

The purpose of the utility model is to provide a loudspeaker box with high assembly efficiency and good acoustic performance.

In order to achieve the above object, the present invention provides a speaker box, which includes a lower cover, an upper cover that is arranged on the lower cover and jointly encloses an accommodating space, and is accommodated in the accommodating space and supported on the upper cover. The sound-producing monomer and the air-permeable isolation component of the cover; the sound-producing monomer and the upper cover are separated to form a front cavity; the sound-producing monomer, the upper cover and the lower cover jointly enclose a rear cavity, and the air-permeable The isolation component divides the rear cavity into a first rear cavity and a second rear cavity that are in air communication with each other, the sound-producing monomer is at least partially located in the first rear cavity, and the air-permeable isolation component is fixed to the lower cover and The second back cavity is enclosed with the lower cover at intervals, the second back cavity is filled with sound-absorbing particles, and the air-permeable isolation component encapsulates the sound-absorbing particles in the second back cavity; the air-permeable isolation The assembly includes a gas-permeable spacer, a first reinforcement ring attached to the side of the gas-permeable spacer close to the lower cover and extending along the periphery of the gas-permeable spacer, and a first reinforcement ring attached to the gas-permeable spacer away from the lower cover A second reinforcement ring on one side; the first reinforcement ring is supported and connected to the lower cover, the air-permeable spacer is provided with a powder filling port passing through it, and the second reinforcement ring is arranged around the powder filling hole The speaker box also includes a sealing cover arranged on the side of the second reinforcement ring away from the second rear cavity and sealing the powder filling hole.

Preferably, the air-permeable isolator includes a body portion that is arranged directly opposite to the sound-emitting monomer, and an extension body that extends from one end of the body portion and is staggered from the sound-emitting monomer, and the powder filling hole is opened in The extension.

Preferably, the inner side of the lower cover protrudes to form a support wall corresponding to the position of the first reinforcement ring, and the first reinforcement ring is supported and fixed to the support wall.

Preferably, the first reinforcement ring and the second reinforcement ring are both made of metal materials.

Preferably, the lower cover is provided with a through hole penetrating therethrough and communicating the second rear cavity with the outside, and a steel sheet covering the through hole, and the steel sheet is parallel to the air-permeable spacer. Pair set.

Preferably, the sealing cover is made of PET material.

Beneficial effect

Compared with the related art, the speaker box of the present invention is provided with a breathable isolation component between the sound emitting monomer and the lower cover, and the first reinforcement ring is supported and connected to the lower cover and is connected to the elastic The spacer and the lower cover jointly enclose the second rear cavity. By opening a powder filling hole in the extension of the air-permeable spacer, the sound-absorbing particles are filled to the second cavity through the powder filling hole. In the rear cavity, the rear side of the vocal unit forms an integral DBASS virtual sound cavity, which effectively improves the low-frequency acoustic performance; at the same time, because the powder filling hole is opened in the air-permeable partition, it avoids the lower cover when the powder filling hole is opened in the lower cover A sinking platform is needed to occupy the height space of the powder filling channel, and the powder filling hole is opened in the air-permeable partition so that the powder filling channel has the same height as the DBASS virtual sound cavity, which effectively improves the filling efficiency and reliability of the sound-absorbing particles.

Description of the drawings

In order to more clearly explain the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present utility model. For example, for those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings, among which:

Figure 1 is a schematic diagram of the three-dimensional structure of the speaker box of the present invention;

Figure 2 is an exploded schematic diagram of a part of the three-dimensional structure of the speaker box of the present invention;

Figure 3 is an exploded schematic view of a partial three-dimensional structure of the speaker box of the present invention from another perspective;

Figure 4 is a cross-sectional view taken along line A-A in Figure 1;

Fig. 5 is an enlarged view of the part B shown in Fig. 4.

Embodiments of the present invention

The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, not all of them. Examples. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present utility model.

Please refer to FIGS. 1-5 at the same time. The present invention provides a speaker box 100, which includes a lower cover 1, an upper cover 2, a sound emitting monomer 3, a ventilating isolation component 4, and a sealing cover 5. The upper cover 2 covers the lower cover 1 and forms a receiving space 10 together.

The sound emitting unit 3 is received in the receiving space 10 and supported by the upper cover 2. The sounding monomer 3 and the upper cover 2 are spaced to form a front cavity 101.

Specifically, the upper cover 2 is formed with a sound guide channel 21, the sound emitting unit 3 includes a diaphragm 31, and the diaphragm 31 is spaced from the upper cover 2 to form a front acoustic cavity 6, and the sound guide channel 21 connects The front acoustic cavity 6 communicates with the outside and forms the front cavity 101 together for forming a side sounding structure. The sound emitting monomer 3, the upper cover 2 and the lower cover 1 jointly enclose a rear cavity 102 for improving low-frequency acoustic performance.

The air-permeable isolation assembly 4 divides the rear cavity 102 into a first rear cavity 1021 and a second rear cavity 1022 that are in air communication with each other. The sounding monomer 3 is at least partially located in the first rear cavity 1021. The air-permeable isolation assembly 4 is fixed to the lower cover 1 and is spaced from the lower cover 1 to form the second rear cavity 1022; the second rear cavity 1022 is filled with sound-absorbing particles 7 to form a DBASS virtual sound cavity, with To further improve the low-frequency acoustic performance.

Specifically, the air-permeable isolation component 4 encapsulates the sound-absorbing particles 7 in the second rear cavity 1022; the air-permeable isolation component 4 includes an air-permeable spacer 41, which is attached to the air-permeable spacer 41 close to the A first reinforcement ring 42 on one side of the lower cover 1 and extending along the periphery of the air-permeable spacer 41 and a second reinforcement ring 43 attached to the side of the air-permeable spacer 41 away from the lower cover 1.

The air-permeable isolator 41 includes a main body portion 411 that is directly opposite to the sound-emitting monomer 3 and an extension body 412 that extends from one end of the main body portion 411 and is staggered from the sound-emitting monomer.

In order to improve the reliability and strength of the powder filling hole, in this embodiment, the first reinforcing ring 42 is supported and connected to the lower cover 1, and the air-permeable spacer 41 is provided with a powder filling port 413 passing through it. The second reinforcement ring 43 is arranged around the powder filling hole 413.

In this embodiment, the powder filling hole 413 is opened in the extension 412, that is, the powder filling hole 413 is staggered from the sound emitting monomer 3.

The sound-absorbing particles 7 are filled into the second rear cavity 1022 through the powder filling hole 413, and the air-permeable isolation component 4 encapsulates the sound-absorbing particles 7 in the second rear cavity 1022.

In this embodiment, it is more preferable that the air-permeable isolation assembly 4 is arranged perpendicular to the vibration direction, that is, the air-permeable isolation assembly 4 and the sound emitting monomer 3 are arranged in parallel, so that the volume of the second rear cavity 1022 is maximized.

The area in the second back cavity 1022 facing the powder filling hole 413 is a powder filling channel. In the above structure, since the powder filling hole 413 is opened in the extension 412 of the air-permeable partition 41, it is avoided that when the powder filling hole 413 is opened on the lower cover 1, the lower cover needs to be provided with a sinker on the lower cover 1 and occupying the height space of the powder filling channel , And the powder filling hole 413 is opened in the air-permeable partition 41 so that the powder filling channel is consistent with the height of the second rear cavity 1022 of the light-filled DBASS virtual acoustic cavity, which effectively improves the filling efficiency and filling reliability of the sound-absorbing particles 7.

The sealing cover 5 is arranged on the side of the second reinforcement ring 43 away from the second rear cavity 1022, and the sealing cover 5 is used to seal the powder filling hole 413. Because the sealing cover 5 is located on the side of the air-permeable isolation assembly 4 away from the second rear cavity 1022, on the one hand, it is convenient to seal the powder filling hole 413, and on the other hand, it does not occupy the volume of the second rear cavity 1022, so that the second rear cavity The cavity 1022 is filled with more sound-absorbing particles.

When assembling, first assemble the lower cover 1 and the air-permeable isolation assembly 4 to form the second rear cavity 1022, pour the sound-absorbing particles 7 into the second rear cavity 1022 through the powder filling hole 413, and then seal the powder filling hole 413 with the sealing cover 5. Finally, the lower cover 1 is placed on the upper cover 2 and connected by ultrasonic.

More preferably, the sealing cover 5 is made of PET material.

In this embodiment, in order to greatly increase the height of the second rear cavity 1022 along the vibration direction, it is necessary to prevent the sealing cover 5 and the sounding monomer 3 from interfering with each other. Therefore, the extension 412 and the sounding single The body 3 is staggered, and the powder filling hole 413 is opened in the extension body 412, that is, the sealing cover 5 and the sounding monomer 3 are staggered to each other.

More preferably, both the first reinforcement ring 42 and the second reinforcement ring 43 are made of metal materials, such as steel rings. While meeting the strength, the metal material can be made thinner and occupy the body cavity of the rear cavity 102 as little as possible.

In this embodiment, the weight of the air-permeable isolation assembly increases due to the arrangement of the first reinforcement ring 42. Therefore, correspondingly, the inner side of the lower cover 1 protrudes to form a support wall 11 corresponding to the position of the first reinforcement ring 42. The first reinforcing ring 42 is supported and fixed to the supporting wall 11 to improve the stability of the air-permeable isolation assembly.

In order to further increase the volume of the second back cavity 1022, the lower cover 1 is provided with a through hole 12 penetrating through it and communicating the second back cavity 1022 with the outside, and a steel sheet 13 covering the through hole 12 . The steel sheet 13 can be designed to be thinner than the thickness of the lower cover 1 under the premise that the strength of the lower cover 1 is satisfied, thereby increasing the volume of the second rear cavity 1022. More preferably, the steel sheet 13 and the air-permeable spacer 41 are arranged in parallel and facing each other.

Compared with the related art, the speaker box of the present invention is provided with a breathable isolation component between the sound emitting monomer and the lower cover, and the first reinforcement ring is supported and connected to the lower cover and is connected to the elastic The spacer and the lower cover jointly enclose the second rear cavity. By opening a powder filling hole in the extension of the air-permeable spacer, the sound-absorbing particles are filled to the second cavity through the powder filling hole. In the rear cavity, the rear side of the vocal unit forms an integral DBASS virtual sound cavity, which effectively improves the low-frequency acoustic performance; at the same time, because the powder filling hole is opened in the air-permeable partition, it is avoided that the powder filling hole is opened in the lower cover when the lower cover A sinking platform is needed to occupy the height space of the powder filling channel, and the powder filling hole is opened in the ventilating partition to make the powder filling channel consistent with the height of the DBASS virtual sound cavity, which effectively improves the filling efficiency and reliability of the sound-absorbing particles.

The above are only the embodiments of the utility model, and do not limit the patent scope of the utility model. Any equivalent structure or equivalent process transformation made by using the description and drawings of the utility model, or directly or indirectly applied to other Related technical fields are included in the scope of patent protection of the utility model in the same way.

Claims

A loudspeaker box comprising a lower cover, an upper cover covered on the lower cover and jointly enclosing a receiving space, a sounding monomer received in the receiving space and supported by the upper cover, and a gas-permeable isolation component; The sounding monomer and the upper cover are spaced apart to form a front cavity, the sounding monomer, the upper cover and the lower cover are jointly enclosed to form a rear cavity, and the air-permeable isolation component separates the rear cavity from each other The first rear cavity and the second rear cavity are in air communication, the sound emitting monomer is at least partially located in the first rear cavity, and is characterized in that the air-permeable isolation component is fixed to the lower cover and is spaced apart from the lower cover The second back cavity is enclosed, and the second back cavity is filled with sound-absorbing particles, the air-permeable isolation component encapsulates the sound-absorbing particles in the second back cavity; the air-permeable isolation component includes a gas-permeable spacer, A first reinforcement ring attached to the side of the air-permeable spacer close to the lower cover and extending along the periphery of the air-permeable spacer, and a second reinforcement ring attached to the side of the air-permeable spacer away from the lower cover Ring; the first reinforcement ring is connected to the lower cover, the air-permeable spacer is provided with a powder filling port through it, the second reinforcement ring is arranged around the powder filling hole; the speaker box is also It includes a sealing cover arranged on the side of the second reinforcement ring away from the second back cavity and sealing the powder filling hole.
The speaker box according to claim 1, wherein the air-permeable isolator includes a body portion that is arranged directly opposite to the sound-emitting monomer, and a body portion extending from one end of the body portion is staggered from the sound-emitting monomer. The extension body, the powder filling hole is opened in the extension body.
The speaker box according to claim 1, wherein the inner side of the lower cover protrudes corresponding to the position of the first reinforcement ring to form a support wall, and the first reinforcement ring is supported and fixed to the support wall.
The speaker box according to claim 1, wherein the first reinforcement ring and the second reinforcement ring are both made of metal materials.
The speaker box according to claim 1, wherein the lower cover is provided with a through hole penetrating through it and communicating the second rear cavity with the outside, and a steel sheet covering the through hole, so The steel sheet and the air-permeable spacer are arranged in parallel and directly opposite to each other.
The speaker box according to claim 1, wherein the sealing cover is made of PET material.