WO2021253535A1

WO2021253535A1 - Loudspeaker box

Info

Publication number: WO2021253535A1
Application number: PCT/CN2020/101273
Authority: WO
Inventors: 丁健华; 吴树文
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: 2020-06-15
Filing date: 2020-07-10
Publication date: 2021-12-23
Also published as: CN212628255U

Abstract

Provided by the present utility model is a loudspeaker box, which comprises a lower cover, an upper cover, a sound generating unit, and an air permeable spacer; the sound generating unit comprises a magnetic circuit system; the upper cover comprises an upper cover body, which covers on the lower cover, and a support wall, which protrudes and extends from the upper cover body to the lower cover, and the sound generating unit is supported and fixed on the support wall; the air permeable spacer is located between the sound generating unit and the lower cover; the air permeable spacer is made of a metal material, and the air permeable spacer comprises a main body part, which covers the sound generating unit and is arranged at interval an with the lower cover, and an extending wall, which bendingly extends from the periphery of the main body part to the support wall; the extending wall is disposed around the peripheral side of the sound generating unit, and the air permeable spacer is fixed by means of the magnetic attraction with the magnetic circuit system so that the air permeable spacer separates the receiving space into a front cavity and a rear cavity; and the rear cavity is filled with sound-absorbing particles, and the air permeable spacer encapsulates the sound-absorbing particles in the rear cavity. Compared with related technologies, the loudspeaker box of the present utility model has excellent low-frequency acoustic performance and high assembly efficiency.

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, mobile phones have extremely diverse functions, one of which is high-quality music functions. Therefore, speaker boxes for playing sound are widely used in current smart mobile devices.

The speaker box in the related art includes an upper cover, a lower cover assembled with the upper cover to form a containing space, a sound emitting unit separately contained in the containing space, a ring-shaped bracket, and a ventilating isolation component; The isolation assembly includes a bracket that fixes the upper cover and surrounds the sound-producing unit, and a breathable spacer between the sound-producing unit and the lower cover. The periphery of the breathable spacer is fixed to the bracket, so The sound-producing monomer and the air-permeable isolation component jointly divide the containing space into a front cavity and a rear cavity, so as to realize a fully tankable structure in the rear cavity.

technical problem

However, in the speaker box of the related art, the bracket and the upper cover need to be assembled and glued first, and then the air-permeable spacer is assembled and glued to the bracket to realize the above-mentioned full-filled sound-emitting monomer isolation solution. The structure has many assembly and gluing steps, which seriously affects the assembly production efficiency.

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 excellent low-frequency acoustic performance and high assembly efficiency.

In order to achieve the above objective, the present invention provides a loudspeaker box, including a lower cover, an upper cover covering the lower cover and jointly enclosing a containing space, a sounding monomer contained in the containing space, and a breathable isolation The vocal unit includes a magnetic circuit system, the upper cover includes an upper cover body covering the lower cover and a support wall protruding from the upper cover body to the lower cover, the The sound-producing monomer is supported and fixed to the supporting wall; the air-permeable isolator is located between the sound-producing monomer and the lower cover; the air-permeable isolator is made of metal material, and the air-permeable isolator includes a cover arranged at The main body part of the sound-emitting unit and spaced apart from the lower cover and an extension wall bent and extended from the periphery of the main body part to the support wall, the extension wall is arranged around the peripheral side of the sound-emitting unit , And the air-permeable spacer is fixed by magnetic attraction between the magnetic circuit system and the air-permeable spacer separates the containing space into a front cavity and a back cavity; the back cavity is filled with sound-absorbing particles, The air-permeable spacer encapsulates the sound-absorbing particles in the rear cavity.

Preferably, the extension wall abuts against the support wall.

Preferably, the speaker box further includes a circuit board, one end of the circuit board is fixed and electrically connected with the sound emitting unit, the other end of the circuit board extends to the outside of the receiving space through the rear cavity, and the extension wall is provided with A relief groove is formed at one end of the support wall that is recessed toward the lower cover, and the circuit board extends through the relief groove; the location of the relief groove and the circuit board are sealed by gluing.

Preferably, the circuit board includes a first section located between the extension wall and the sound emitting unit, and extends from opposite ends of the first section to the sound emitting unit and is connected to the sound emitting unit. A second section forming an electrical connection and a third section extending from the first section away from the sound emitting unit, the third section passing through the relief groove and extending through the upper cover to the receiving Outside the space, the location of the relief groove and the third section are sealed by gluing.

Preferably, the upper cover is further provided with a supporting wall protruding from the outside thereof, and the third section is attached to the supporting wall.

Preferably, the supporting wall is provided with a positioning post on one side close to the third section, and the third section is provided with a positioning hole penetrating therethrough, and the positioning post is inserted into the positioning hole.

Preferably, the loudspeaker box further includes a support member that is stacked and fixed on a side of the sound emitting unit close to the main body, and the main body abuts against the support.

Preferably, the support member is attached to a side of the magnetic circuit system close to the main body.

Preferably, the supporting member includes two first supporting parts arranged opposite to each other and a second supporting part connecting the two first supporting parts.

Preferably, the speaker box further includes a powder filling hole provided through the upper cover and/or the lower cover and a sealing cover covering the powder filling hole.

Beneficial effect

Compared with the related art, the speaker box of the present invention supports and fixes the sound-producing monomer to the supporting wall and positions the air-permeable isolator between the sound-producing monomer and the lower cover, and the air-permeable isolator is made of metal material. , The air-permeable isolator includes a main body part covering the sound-emitting monomer and spaced apart from the lower cover, and an extension wall bent and extended from the periphery of the main body part toward the supporting wall, the extension wall Arranged around the peripheral side of the sound emitting unit, the air-permeable spacer is fixed by the magnetic attraction between the magnetic circuit system and the air-permeable spacer separates the receiving space into a front cavity and a rear cavity, The above structure allows the rear cavity of the air-permeable spacer away from the sound-emitting monomer to be filled with sound-absorbing particles as a virtual sound cavity, which greatly improves the filling efficiency of the sound-absorbing particles in the rear cavity and effectively improves the low-frequency acoustic performance of the speaker box. At the same time, because the air-permeable spacer is fixed by the magnetic attraction of the magnetic circuit system, the procedure of glueing and fixing is omitted, and the production efficiency is effectively improved.

Description of the drawings

In order to explain the technical solutions in the embodiments of the present utility model more clearly, 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 a sectional view taken along the line A-A in Figure 1;

4 is a schematic structural diagram of another embodiment of the powder filling hole in the speaker box of the present invention;

Figure 5 is a schematic structural view of another embodiment of the powder filling hole in the speaker box of the present invention.

Embodiments of the present invention

The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to 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. 1-3 at the same time. The present invention provides a speaker box 100, which includes a lower cover 1, an upper cover 2, a sounding monomer 3, and a ventilating spacer 4. The lower cover 1 is disposed on the upper cover 2 and jointly encloses a receiving space 10.

Specifically, the upper cover 2 includes an upper cover body 21 covering the lower cover 1, a supporting wall 22 projecting and extending from the upper cover body 21 in the direction of the lower cover, and a support wall 22 formed on the upper cover The sound guide channel 23 of the body 21.

The sound emitting unit 3 is received in the receiving space 10 and supported by the upper cover 2. The sound emitting unit 3 includes a vibration system 31 and a magnetic circuit system 32 that drives the vibration system 31 to vibrate and produce sound.

The sound unit 3 is supported and fixed to the supporting wall 22. In this embodiment, the periphery of the sound-producing monomer 3 is fixed to the supporting wall 22 by glue.

The air-permeable spacer 4 is housed in the receiving space 10 and is located between the sound emitting monomer 3 and the lower cover 1. The air-permeable spacer 4 divides the receiving space 10 into a front cavity 101 and后室102。 After the cavity 102.

The front cavity 101 is used for sound production, and the sound guide channel 23 forms the front cavity 101 into a side sound emitting structure. The rear cavity 102 is filled with sound-absorbing particles 5, and the air-permeable spacer 4 encapsulates the sound-absorbing particles 5 in the rear cavity 102 to form a DBASS virtual acoustic cavity for further improving low-frequency acoustic performance.

The vibration system 31 is spaced from the upper cover body 21 to form a front acoustic cavity 6, and the sound guide channel 23 connects the front acoustic cavity 6 with the outside and forms the front cavity 101 together for forming a side sounding structure. The sound emitting monomer 3, the air-permeable isolator 4, the upper cover 2 and the lower cover 1 jointly enclose the rear cavity 102 for improving low-frequency acoustic performance.

The air-permeable spacer 4 is made of metal material. Specifically, the air-permeable isolator 4 includes a main body 41 covering the sound-producing monomer 3 and spaced apart from the lower cover 1, and extending from the periphery of the main body 41 toward the supporting wall 22. The extension wall 42 is arranged around the peripheral side of the sound-producing monomer 3, and the air-permeable spacer 4 is fixed by the magnetic attraction force between the magnetic circuit system 32 and the air-permeable isolation The piece 4 divides the receiving space 10 into the front cavity 101 and the rear cavity 102. So far, the air-permeable spacer 4 forms a three-dimensional structure, and separates the sound-emitting monomer 3 from the rear cavity 102 to prevent the sound-absorbing particles 5 from entering the sound-emitting monomer 3 from the rear cavity 102 to affect the sound production performance, thereby effectively improving The sound reliability of the speaker box 100 is improved.

The above structure enables the rear cavity 102 on the side of the air-permeable spacer 4 away from the sound-emitting monomer 3 to be fully filled with sound-absorbing particles 5 as the D-BASS virtual sound cavity, which greatly improves the filling efficiency of the sound-absorbing particles 5 of the rear cavity 102 , Which effectively improves the low-frequency acoustic performance of the speaker box 100. At the same time, since the air-permeable spacer 4 is fixed by the magnetic attraction force of the magnetic circuit system 32, the process of glueing and fixing is omitted, and the production efficiency is effectively improved.

In this embodiment, the extension wall 42 abuts against the support wall 22 and is fixed by magnetic attraction with the magnetic circuit system 22.

The speaker box 100 further includes a circuit board 7, one end of the circuit board 7 is fixedly electrically connected to the sound emitting unit 3, and the other end of the circuit board 7 extends outside the receiving space 10 through the rear cavity 102 for the sound generation The monomer 3 introduces an external electric signal.

In order to cooperate with the assembly of the circuit board 7, the extension wall 42 is provided with a relief groove 421 formed by its end close to the support wall 22 recessed in the direction of the lower cover 1, and the circuit board 7 passes through the relief groove 421. The groove 421 extends, for example, extends to the rear cavity 102 through the relief groove 421, and then further extends to the outside of the accommodating space 10. The location of the relief groove 421 and the circuit board 7 are sealed by gluing to prevent sound-absorbing particles 5 In this way, the inside of the sound emitting unit 3 is entered.

Specifically, the circuit board 7 includes a first section 71 located between the extension wall 42 and the sound emitting unit 3, and extends from opposite ends of the first section 71 to the sound emitting unit 3 and The second section 72 that is electrically connected to the sounding monomer 3 and the third section 73 that extends away from the sounding monomer 3 from the first section 71, the third section 73 is used to connect an external electric Signal.

The third section 73 passes through the relief groove 421 and penetrates the upper cover 2 to extend to the outside of the receiving space 10, and the position where the relief groove 421 is located and the third section 73 are sealed by gluing.

In this embodiment, the upper cover 2 is further provided with a supporting wall 24 protruding from the outside thereof, and the third section 73 is attached to the supporting wall 24 to support the third section 73, which is convenient for communication with External electrical signal source connection.

More preferably, the supporting wall 24 is provided with a positioning post 241 on one side close to the third section 73, and the third section 73 is provided with a positioning hole 731 passing through it, and the positioning post 241 is inserted into the third section 73. In the positioning hole 731, the positioning of the third section 73 is formed, which improves the assembly efficiency on the one hand, and prevents the movement of the third section 73 on the other hand, and improves the stability of the connection with the external power signal.

Furthermore, the speaker box 100 further includes a support 8 which is stacked and fixed on the side of the sound emitting unit 3 close to the main body 41, and the main body 41 abuts against the support 8. The support 8 forms a support for the main body 41, so that the structure of the air-permeable partition 4 is stable, the filling effect of the sound-absorbing particles 5 in the rear cavity 102 is improved, and the acoustic performance is further improved.

In this embodiment, the support 8 is attached to the side of the magnetic circuit system 32 close to the main body 41.

Specifically, the supporting member 8 includes two first supporting parts 81 and a second supporting part 82 connecting the two first supporting parts 81 arranged at intervals, so as to form an "I"-shaped structure with a better supporting effect. For example, the first supporting portion 81 is arranged parallel to the long axis of the sound emitting unit 3 and is arranged opposite to each other, and the second supporting portion 82 is arranged parallel to the short axis of the sound emitting unit 3.

The speaker box 100 is further provided with a powder filling hole 9 and a sealing cover 91 covering the powder filling hole 9. The powder filling hole 9 is in communication with the rear cavity 102 for filling the rear cavity 102 with sound-absorbing particles 5.

As shown in FIG. 2, the powder filling holes 9 include at least two, and they are provided on the upper cover 2 and the lower cover 1 respectively.

Of course, the setting of the powder filling hole 9 is not limited to the above method, and can also be set separately:

As shown in the speaker box 400 in FIG. 4, the powder filling hole 409 includes the upper cover 402 and the sealing cover 491 covers the powder filling hole 409.

As shown in the speaker box 500 in FIG. 5, the powder filling hole 509 includes the lower cover 501 and the sealing cover 591 covers the powder filling hole 509.

The above are only the embodiments of the present utility model, and do not limit the scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the utility model description and drawings, 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 speaker box comprising a lower cover, an upper cover arranged on the lower cover and jointly enclosing a containing space, a sound emitting monomer and a ventilated spacer contained in the containing space; the upper cover includes a cover arranged in The upper cover body of the lower cover and the supporting wall protruding and extending from the upper cover body in the direction of the lower cover, the sound generating unit includes a magnetic circuit system, and the sound generating unit is supported and fixed to the support wall , Characterized in that the air-permeable isolator is located between the sound-producing monomer and the lower cover; the air-permeable isolator is made of a metal material, and the air-permeable isolator includes a cover placed on the sound-producing monomer and A main body part spaced apart from the lower cover and an extension wall bent and extended from the periphery of the main body part to the support wall, the extension wall is arranged around the peripheral side of the sound-producing monomer, and the air-permeable isolation The air-permeable spacer separates the containing space into a front cavity and a rear cavity by the magnetic attraction force between the magnetic circuit system and the magnetic circuit system; the rear cavity is filled with sound-absorbing particles, and the air-permeable spacer The sound-absorbing particles are encapsulated in the rear cavity.
The speaker box according to claim 1, wherein the extension wall abuts against the support wall.
The speaker box according to claim 1, wherein the speaker box further comprises a circuit board, one end of the circuit board is fixedly electrically connected to the sound emitting unit, and the other end of the circuit board extends to the Outside the accommodating space, the extension wall is provided with a relief groove formed by its end close to the support wall recessed in the direction of the lower cover, and the circuit board extends through the relief groove; where the relief groove is located The location and the circuit board are sealed by gluing.
The speaker box according to claim 3, wherein the circuit board comprises a first section between the extension wall and the sound-producing unit, and the first section extends from opposite ends of the first section to the A second section extending from the sounding monomer and forming an electrical connection with the sounding monomer, and a third section extending away from the sounding monomer from the first section, the third section passing through the relief groove And extend through the upper cover to the outside of the containing space, and the position where the relief groove is located and the third section are sealed by gluing.
The speaker box according to claim 4, wherein the upper cover is further provided with a supporting wall protruding and extending from the outer side thereof, and the third section is attached to the supporting wall.
The speaker box according to claim 5, wherein the supporting wall is provided with a positioning column on one side close to the third section, and the third section is provided with a positioning hole passing through it, and the positioning column Inserted in the positioning hole.
The speaker box according to claim 1, wherein the speaker box further comprises a support member that is stacked and fixed on a side of the sound emitting unit close to the main body, and the main body abuts against the support Pieces.
The speaker box according to claim 7, wherein the support member is attached to a side of the magnetic circuit system close to the main body.
7. The speaker box according to claim 7, wherein the supporting member comprises two first supporting parts arranged opposite to each other and a second supporting part connecting the two first supporting parts.
The speaker box according to claim 1, wherein the speaker box further comprises a powder filling hole provided through the upper cover and/or the lower cover and a sealing cover covering the powder filling hole.