WO2021134467A1

WO2021134467A1 - Loudspeaker box

Info

Publication number: WO2021134467A1
Application number: PCT/CN2019/130482
Authority: WO
Inventors: 印兆宇; 陈志臣; 柳林
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: 2019-12-31
Filing date: 2019-12-31
Publication date: 2021-07-08

Abstract

Provided is a loudspeaker box. The loudspeaker box comprises an upper cover, a lower cover forming an accommodating space with the upper cover, and a loudspeaker unit; the lower cover comprises a lower cover bottom wall, a side wall fixed on the upper cover, and a convex column; the loudspeaker box further comprises a sealing plate fixed on the convex column; the sealing plate comprises a ventilation isolation member and a fixed ring; the fixed ring and an inner wall of the side wall are fixed by means of glue dispensing; the lower cover bottom wall, the fixed ring, the side wall and the ventilation isolation member enclose to form a first filling cavity for accommodating a sound absorption material; the upper cover is provided with an upper cover bottom wall and a baffle; and the loudspeaker box further comprises a second filling cavity provided at a side of the baffle that is away from the loudspeaker unit. In the present utility model, a channel formed between the fixed ring of the sealing plate and the lower cover bottom wall can connect the first cavity and the second filling cavity, which accommodates the sound absorption material and is on the side of the baffle away from the loudspeaker unit, to form a whole, such that only one instance of powder filling is needed, the assembly efficiency is improved, and the cost is also reduced.

Description

A speaker box

Technical field

The utility model belongs to the technical field of electroacoustics, and particularly relates to a speaker box.

Background technique

With the rapid development of science and technology, audio equipment continues to develop rapidly, and people have higher and higher requirements for the functionality of audio equipment. For speaker boxes, more and more people have put forward higher requirements for their audio performance. In the related technology, if you want to fill the sound-absorbing material, it is usually filled with a sound-absorbing material on the back of the speaker unit separated by a hot melt or a horizontal plate, and then separated by a hot melt or an insert plate on the side of the speaker unit. For regional filling of sound-absorbing materials, the two filling areas are not connected, and two powder filling holes need to be opened for powder filling, or even in extreme cases, two powder fillings are required.

technical problem

The purpose of the utility model is to provide a loudspeaker box, which aims to improve the efficiency of filling sound-absorbing materials and assembly, and reduce the cost.

Technical solutions

The technical solution of the present invention is as follows: a speaker box comprising an upper cover, a lower cover forming a housing space with the upper cover, and a speaker unit accommodated in the housing space and fixed to the upper cover, so The lower cover includes a lower cover bottom wall, a side wall extending from the periphery of the lower cover bottom wall toward the upper cover and fixed on the upper cover, and a plurality of side walls extending from the lower cover bottom wall toward the upper cover The speaker box further includes a sealing plate fixed on the convex column, the sealing plate includes a gas-permeable spacer and a side of the gas-permeable spacer close to the lower cover along the A fixing ring surrounded by the periphery of the air-permeable spacer and fixed to the air-permeable spacer, the protruding column supports the fixing ring and the fixing ring and the inner wall of the side wall are fixed by dispensing glue, the bottom wall of the lower cover, The fixing ring, the side wall and the air-permeable spacer are enclosed to form a first filling cavity containing sound-absorbing material, and the upper cover is provided with an upper cover bottom wall and a bottom wall from the upper cover in the area where the speaker unit is not placed. The bottom wall of the cover extends toward the lower cover and abuts against the baffle of the air-permeable spacer. The speaker box further includes a second filling cavity provided on the side of the baffle away from the speaker unit, one of which is A channel connecting the first filling cavity and the second filling cavity is formed between the fixing ring facing the second filling cavity and the bottom wall of the lower cover.

Further, the side wall includes two oppositely arranged long axis side walls and a short axis side wall arranged oppositely and connecting the two long axis side walls, and the extension direction of the baffle is the same as that of the short axis side wall. The directions are the same, and the two ends of the baffle respectively abut against the inner wall surfaces of the two groups of the long axis side walls.

Further, the protruding post includes two first protruding posts corresponding to the baffle, and the projection of the first protruding post along the assembling direction of the upper cover and the lower cover falls on the side of the baffle. Inside the projection of the assembling direction of the upper cover and the lower cover, the two first protruding pillars are respectively connected with two opposite sections of the long axis side walls.

Further, the protruding post further includes a second protruding post, the second protruding post is arranged at the connection between the long axis side wall and the short axis side wall and is connected to the long axis side wall and the short axis side wall respectively. The side walls of the minor axis are connected.

Further, the heights of a plurality of the protruding columns relative to the side wall are equal.

Further, the baffle and the air-permeable spacer are sealed by foam or glued.

Further, the fixed ring is made of metal material or FR-4 grade material.

Further, the speaker box further includes a flexible circuit board electrically connected to the speaker unit, one end of the flexible circuit board is connected to the speaker unit, and the other end of the flexible circuit board extends toward the baffle .

Further, the bottom wall of the upper cover is provided with a powder filling hole for filling the sound-absorbing material, and the powder filling hole is in communication with the second filling cavity.

Further, an area of the upper cover corresponding to the speaker unit is provided with a through hole that penetrates the upper cover and communicates with the accommodating space, and the upper cover further includes a cover provided with the through hole and fixed to the The upper cover of the steel sheet.

Beneficial effect

The beneficial effect of the utility model is that the speaker box of the utility model is provided with a protruding column supporting the sealing plate on the bottom wall of the lower cover, and the bottom wall of the lower cover cooperates with the side wall and the sealing plate to form a first filling cavity containing the sound-absorbing material. In addition, the channel formed between the fixing ring of the sealing plate and the bottom wall of the lower cover can connect the first cavity and the second filling cavity of the baffle away from the speaker unit side that contains the sound-absorbing material into a whole, so that only filling is required. Once powder is used, the efficiency of assembly is improved and the cost is also reduced.

Description of the drawings

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

Figure 2 is a schematic diagram of an exploded structure of a speaker box provided by an embodiment of the present invention;

Figure 3 is a schematic diagram of the structure of the upper cover provided by the embodiment of the present invention;

4 is a schematic diagram of the structure of the lower cover and the sealing plate provided by the embodiment of the present invention;

FIG. 5 is a schematic structural diagram from another perspective of FIG. 4;

Fig. 6 is a schematic cross-sectional view taken along the A-A direction of Fig. 1;

FIG. 7 is a schematic diagram of an enlarged structure of part B in FIG. 6.

Embodiments of the present invention

The present utility model will be further explained below in conjunction with the drawings and embodiments.

As shown in Figures 1 to 3, it is a speaker box provided by an embodiment of the present invention. Please refer to Figures 5 and 6 together. The speaker box includes an upper cover 1 and a lower cover forming a receiving space 6 with the upper cover 1. 2 and a speaker unit 3 housed in the accommodating space 6 and fixed to the upper cover 1. The lower cover 2 includes a lower cover bottom wall 22 that extends from the periphery of the lower cover bottom wall 22 toward the upper cover 1 and is fixed to the upper cover 1 on the side wall 21 and a plurality of protrusions 23 extending from the bottom wall 22 of the lower cover toward the upper cover 1. The speaker box also includes a sealing plate 4 fixed on the protrusions 23, and the sealing plate 4 includes a gas-permeable partition 41 and a fixing ring 42 that surrounds the air-permeable spacer 41 on the side close to the lower cover 2 and is fixed to the air-permeable spacer 41. The boss 23 supports the fixing ring 42 and the fixing ring 42 passes through the inner wall of the side wall 21 Dispensing and fixing, the bottom wall 22 of the lower cover, the fixing ring 42, the side wall 21 and the air-permeable partition 41 are enclosed to form a first filling cavity 61 containing the sound-absorbing material. The upper cover 1 is provided with an upper part in the area where the speaker unit 3 is not placed. The bottom wall 11 of the cover and the baffle 12 extending from the bottom wall 11 of the upper cover to the direction of the lower cover 2 and abutting the air-permeable spacer 41, the speaker box further includes a second filling cavity provided on the side of the baffle 12 away from the speaker unit 3 62. A passage 7 connecting the first filling cavity 61 and the second filling cavity 62 is formed between a section of the fixing ring 42 facing the second filling cavity 62 and the bottom wall 22 of the lower cover.

Compared with the related art, the speaker box of the present invention is provided with a boss 23 supporting the sealing plate 4 on the bottom wall 22 of the lower cover, and the bottom wall 22 of the lower cover cooperates with the side wall 21 and the sealing plate 4 to form a second sound-absorbing material. A filling cavity 61, and because the protrusion 23 has a height, there is a gap between the fixing ring 42 of the sealing plate 4 and the bottom wall 22 of the lower cover, and the gap is the distance connecting the first filling cavity 61 and the second filling cavity 62 Channel 7, so that the powder filling only needs to be filled once, which improves the efficiency of assembly and reduces the cost.

Due to the small thickness of the air-permeable spacer 41, it is difficult to ensure that the air-permeable spacer 41 is firmly fixed only by the support of the boss 23. Therefore, the sealing plate 4 of this embodiment further includes a fixing ring 42 fixed to the air-permeable spacer 41. The shape of 42 is adapted to the shape of the side wall 21. The fixing ring 42 and the inner surface of the side wall 21 are glued to ensure that there is no gap between the sealing plate 4 and the side wall 21, which enhances the sealing effect and prevents powder leakage. In addition, one end of the sealing plate 4 does not need to extend into the second filling cavity 62, which can save material and cost.

Please further refer to FIG. 4, the side wall 21 includes two oppositely arranged long-axis side walls 211 and a short-axis side wall 212 oppositely arranged and connected to the two long-axis side walls 211. The extension direction of the baffle 12 and the short-axis side walls The extension direction of 212 is the same, and both ends of the baffle 12 abut against the inner wall surfaces of the two sets of long-axis side walls 211 respectively. The extension direction of the baffle 12 is the same as the extension direction of the short-axis side wall 212, so that the length of the baffle 12 is minimized, the baffle 12 is prevented from occupying too much space, and the space of the second filling cavity 62 is larger. The two ends of the baffle 12 respectively abut the inner wall surfaces of the two sets of long-axis side walls 211, which can further enhance the sealing effect and prevent powder leakage. The baffle 12 and the upper cover 1 are an integral structure, which is easy to process. In this embodiment, the baffle 12 and the air-permeable spacer 41 are sealed by foam, or they can be sealed with glue to avoid powder leakage.

Please further refer to FIGS. 5 to 7, the convex post 23 includes two first convex posts 231 corresponding to the baffle 12, and the projection of the first convex post 231 along the assembly direction of the upper cover 1 and the lower cover 2 falls along the baffle 12 Inside the projection of the assembly direction of the upper cover 1 and the lower cover 2, two first protruding posts 231 are respectively connected to two opposite long-axis side walls 211, so that the first protruding posts 231 are connected to the sealing plate 4 and the sealing plate 4 The baffle 12 achieves a better sealing effect. The protruding pillar 23 further includes a second protruding pillar 232 which is disposed at the connection between the long axis side wall 211 and the short axis side wall 212 and connected to the long axis side wall 211 and the short axis side wall 212 respectively. Of course, the protruding post 23 of this embodiment is not limited to the first protruding post 231 and the second protruding post 232, nor the position of the protruding post 23, but the number of the protruding post 23 should not be too large to prevent occupying too much filling space. Preferably, the heights of the plurality of protruding posts 23 relative to the side wall 21 are equal, so that the sealing plate 4 is parallel to the bottom wall 22 of the lower cover and the bottom wall 11 of the upper cover, and also makes the fixing ring 42 fit the inner surface of the side wall 21 more closely. It is tight to improve the stability of the sealing plate 4. The fixing ring 42 is made of a metal material or FR-4 grade material. FR-4 is a code for a flame-resistant material grade. It represents a material specification that the resin material must be able to extinguish itself after being burned. FR-4 grade material It has the advantages of stable electrical insulation performance, good flatness, smooth surface and no pits. It is suitable for products requiring high-performance electronic insulation.

In this embodiment, the speaker box further includes a flexible circuit board 5 electrically connected to the speaker unit 3. One end of the flexible circuit board 5 is connected to the speaker unit 3, and the other end of the flexible circuit board 5 extends toward the baffle 12. 3 is electrically connected to the flexible circuit board 5 so that the speaker unit 3 is energized and works normally.

In this embodiment, the bottom wall 11 of the upper cover is provided with a powder filling hole 13 for filling sound-absorbing material. The powder filling hole 13 communicates with the second filling cavity 62, and the sound absorbing material is filled into the second filling cavity 62 through the powder filling hole 13 . In this embodiment, the upper cover 1 corresponds to the speaker unit 3 with a through hole 14 that penetrates the upper cover 1 and communicates with the accommodating space 6. The upper cover 1 also includes a steel sheet that covers the through hole 14 and is fixed to the upper cover 1. 16. The steel sheet 16 can increase the strength of the upper cover 1. The bottom wall 22 of the lower cover in this embodiment is also a steel sheet structure.

The above are only the embodiments of the present utility model. 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 utility model, but these all belong to The scope of protection of the utility model.

Claims

A speaker box, comprising an upper cover, a lower cover forming an accommodation space with the upper cover, and a speaker unit accommodated in the accommodation space and fixed to the upper cover, wherein the lower cover includes a lower cover Cover bottom wall, side walls extending from the periphery of the lower cover bottom wall in the direction of the upper cover and fixed on the upper cover, and a plurality of convex posts extending from the bottom wall of the lower cover in the direction of the upper cover , The speaker box further includes a sealing plate fixed on the convex column, the sealing plate includes a gas-permeable spacer and surrounds the gas-permeable spacer on a side of the gas-permeable spacer close to the lower cover And a fixed ring fixed to the air-permeable spacer, the protruding column supports the fixed ring and the fixed ring and the inner wall of the side wall are fixed by dispensing glue, the bottom wall of the lower cover, the fixed ring, The side walls and the air-permeable spacers are enclosed to form a first filling cavity containing sound-absorbing materials, and the upper cover is provided with an upper cover bottom wall in the area where the speaker unit is not placed. The baffle extending in the direction of the lower cover and abutting the air-permeable isolator, the speaker box further includes a second filling cavity provided on the side of the baffle away from the speaker unit, one of which faces the second A channel connecting the first filling cavity and the second filling cavity is formed between the fixing ring of the filling cavity and the bottom wall of the lower cover.
The loudspeaker box according to claim 1, wherein the side wall comprises two groups of long axis side walls that are arranged oppositely and a short axis side wall that is arranged oppositely and connects the two groups of long axis side walls. The extension direction is the same as the extension direction of the short axis side wall, and both ends of the baffle respectively abut against the inner wall surfaces of the two groups of the long axis side walls.
The speaker box according to claim 2, wherein the convex post comprises two first convex posts corresponding to the baffle, and the first convex post is assembled with the lower cover along the upper cover The projection of the direction falls inside the projection of the baffle along the assembling direction of the upper cover and the lower cover, and the two first protrusions are respectively connected with two opposite sections of the long axis side walls.
The speaker box according to claim 2, wherein the protruding post further comprises a second protruding post, and the second protruding post is arranged at the connection between the side wall of the long axis and the side wall of the short axis. Are respectively connected with the long axis side wall and the short axis side wall.
The loudspeaker box according to claim 1, wherein the height of the plurality of protrusions relative to the side wall is equal.
The speaker box according to claim 1, wherein the baffle and the air-permeable spacer are sealed by foam or glued.
The speaker box according to claim 1, wherein the fixing ring is made of metal material or FR-4 grade material.
The speaker box according to claim 1, wherein the speaker box further comprises a flexible circuit board electrically connected to the speaker unit, one end of the flexible circuit board is connected to the speaker unit, and the flexible circuit board The other end of the circuit board extends toward the baffle.
The speaker box according to claim 1, wherein the bottom wall of the upper cover is provided with a powder filling hole for filling the sound-absorbing material, and the powder filling hole is in communication with the second filling cavity.
The speaker box according to claim 1, wherein the area of the upper cover corresponding to the speaker unit is provided with a through hole that penetrates the upper cover and communicates with the accommodating space, and the upper cover further comprises The through hole is covered and fixed to the steel sheet of the upper cover.