WO2022041440A1

WO2022041440A1 - Loudspeaker box

Info

Publication number: WO2022041440A1
Application number: PCT/CN2020/123576
Authority: WO
Inventors: 吴军; 印兆宇; 魏威; 刘忠原
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声光电科技(常州)有限公司
Priority date: 2020-08-27
Filing date: 2020-10-26
Publication date: 2022-03-03
Also published as: CN112073850B; CN112073850A

Abstract

The present invention provides a loudspeaker box, comprising a shell and a sound production unit which are made of a metal material, and an annular support which is made of a plastic material. The shell comprises a front cover and a rear cover; the support comprises a support body part and a support sound guide part extending from the support body part; the sound production unit is supported on the support and spaced from the front cover; the support surrounds the periphery of the sound production unit and is hermetically fixed with the sound production unit; the support sound guide part penetrates through the shell and is at least partially exposed out of the shell; the support sound guide part is provided with a sound guide channel; the sound production unit, the support and the front cover jointly define a front acoustic cavity; the sound production unit, the support, the front cover and the rear cover jointly define a rear acoustic cavity; the front acoustic cavity is communicated with the outside by means of the sound guide channel. Compared with the prior art, the loudspeaker box of the present invention is large in cavity size and good in acoustic performance.

Description

speaker box

technical field

The invention relates to the field of electro-acoustic conversion, in particular to a speaker box used in portable mobile electronic products.

Background technique

Speaker boxes are widely used in portable mobile electronic products, such as mobile phones, to realize the conversion of audio signals into sound playback. The speaker box has high loudness and good low-frequency sound effect.

The speaker box of the related art includes a front cover, a rear cover that is covered on the front cover and jointly encloses a receiving space, and a sound-emitting unit received in the receiving space, and the sound-emitting unit divides the receiving space into Anterior and posterior chambers.

technical problem

However, the front cover and the rear cover of the speaker box of the related art are injection-molded, and the sound-emitting unit is sealed by ultrasonic welding. Ultrasonic welding requires more volume, thus limiting the volume design of the front cavity and the rear cavity. , which in turn limits the acoustic performance.

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

technical solutions

The purpose of the present invention is to provide a loudspeaker box with large cavity volume and good acoustic performance.

In order to achieve the above object, the present invention provides a speaker box, which includes a housing, a sound-generating unit fixedly accommodated in the housing, and a ring-shaped bracket made of a plastic material, the sound-generating unit comprising a For the vibrating diaphragm that vibrates and emits sound, the casing is made of metal material, and the casing includes a front cover and a rear cover that are respectively covered on opposite sides of the sound-emitting unit along the vibration direction of the diaphragm. The bracket includes a bracket main body part located in the casing and fixed to the front cover, and a bracket sound guide part extending from the bracket main body part; the side of the sound generating unit with the diaphragm is supported on the The bracket is arranged at intervals from the front cover, the bracket surrounds the peripheral side of the sound-generating unit and is sealed and fixed with the sound-generating unit, and the sound guiding part of the bracket is along the vibration direction perpendicular to the diaphragm. The sound-guiding part of the bracket is provided with a sound-guiding channel passing through the shell and is at least partially exposed to the shell; the sound-generating unit, the bracket and the front cover together form a front sound cavity , the sound producing unit, the bracket, the front cover and the rear cover together form a rear sound cavity, and the sound guide channel communicates the front sound cavity with the outside world.

Preferably, the main body portion of the bracket includes a bracket fixing portion fixed to the front cover and a bracket support portion bent and extended from the outer periphery of the bracket fixing portion toward the rear cover.

Preferably, the rear cover includes a rear cover plate opposite to the front cover, and a rear cover bent and extended from the outer periphery of the rear cover in the direction of the front cover and fixedly connected to the front cover The sound guiding part of the bracket is disposed through the side wall of the rear cover, and the joint between the sound guiding part of the bracket and the side wall of the rear cover and the front cover is sealed and fixed.

Preferably, the front cover and the bracket are integrally injection-molded.

Preferably, the bracket support portion includes a support portion body that is bent and extended from the bracket fixing portion and is annular, and an outer peripheral edge of the support portion body is directed to the rear cover plate along the peripheral side of the sounding unit. Bending and extending in the direction of the ring-shaped support portion extension wall, the bracket sound guide portion is connected with the support portion extension wall, and the support portion extension wall forms a seal with the peripheral side of the sound producing unit.

Preferably, the speaker box further includes a ventilating spacer located in the rear acoustic cavity, the ventilating spacer is attached to the sound-generating unit and separates the sound-generating unit from the rear acoustic cavity.

Preferably, the ventilating spacer includes a spacer body that is spaced apart from the rear cover and is attached to the sound-generating unit, and a spacer that is bent and extended from the periphery of the spacer body toward the bracket. an extension part; the spacer extension part and the side wall of the back cover are spaced apart and fixed to the bracket support part; the breathable spacer, the bracket, the front cover and the back cover together form a pot The powder space, the powder filling space is used to fill the sound-absorbing material.

Preferably, the shell is provided with a powder filling hole passing through it, and the powder filling hole communicates the rear acoustic cavity with the outside world; the speaker box further includes a sealing cover attached to the shell, the The sealing cap completely covers the filling hole.

Preferably, the powder filling hole is arranged on the side wall of the rear cover.

Preferably, the speaker box further comprises a conductive terminal for connecting the sound generating unit with an external electrical signal, the conductive terminal penetrates through the casing and is partially exposed to the casing.

Preferably, the side wall of the rear cover is provided with a receiving groove formed by an end close to the front cover which is recessed toward the rear cover plate, and the conductive terminal extends through the receiving groove to the outside of the casing, The front cover is simultaneously press-fitted on the conductive terminals and the sidewall of the rear cover to form a sealing and fixing.

beneficial effect

Compared with the related art, in the speaker box of the present invention, the front cover and the rear cover of the casing are made of metal materials, and are fixed to the front cover by brackets made of plastic materials to support and fix the sound-producing unit. In the structure, the plastic bracket is combined with the metal front cover, and the metal front cover is combined with the metal rear cover. On the premise of ensuring the structural strength of the shell, it can be designed to be thinner than the all-plastic shell structure, so that The volume of the cavity in the casing is greatly increased, and the volume of the rear acoustic cavity enclosed by the sound generating unit and the casing is effectively increased, thereby improving the acoustic performance of the speaker box, especially the low-frequency acoustic performance. In addition, in the speaker box of the present invention, the bracket is arranged into a bracket main body part and a bracket sound guiding part, wherein, on the one hand, the sound generating unit can be better fixed to the front cover by setting the bracket main body part, and another aspect of the structure is It can also be used to set the volume size of the front acoustic cavity and the rear acoustic cavity, thereby improving the acoustic performance of the speaker box; At least part of it is exposed to the casing, and this structure makes the shape of the speaker box of the present invention match the shape of the whole machine, thereby making the speaker box easy to use.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, under the premise of no creative work, other drawings can also be obtained from these drawings, wherein:

Fig. 1 is the three-dimensional structure schematic diagram of the speaker box of the present invention;

Fig. 2 is the partial three-dimensional structure exploded schematic diagram of the speaker box of the present invention;

Fig. 3 is a sectional view along line A-A in Fig. 1;

FIG. 4 is a schematic exploded schematic diagram of another part of the three-dimensional structure of the speaker box of the present invention;

FIG. 5 is a schematic exploded schematic diagram of a partial three-dimensional structure of another speaker box of the present invention;

FIG. 6 is a schematic three-dimensional structure diagram of the bracket of the speaker box of the present invention;

FIG. 7 is a schematic three-dimensional structural diagram of another angle of the bracket of the speaker box of the present invention.

Embodiments of the present invention

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to FIGS. 1-7 at the same time, the present invention provides a speaker box 100, which includes a housing 1, a sound-generating unit 2 fixedly accommodated in the housing 1, and a bracket 3 located in the housing 1,

The casing 1 is made of a metal material, and includes a front cover 11 and a rear cover 12 that are respectively covered on opposite sides of the sounding unit 2 along the vibration direction of the diaphragm 21 .

The bracket 3 is made of plastic material and has an annular structure. The bracket 3 is fixed to the front cover 11 .

The sounding unit 2 is supported on the bracket 3 . The bracket 3 surrounds the peripheral side of the sound-generating unit 2 and is sealed and fixed with the sound-generating unit 2 . The sounding unit 2 , the bracket 3 and the front cover 11 together form a front sound cavity 101 .

Wherein, the sound generating unit 2 includes a diaphragm 21 for vibrating and sounding. The diaphragm 21 is accommodated in the front acoustic cavity 101 . The side of the sound generating unit 2 with the diaphragm 21 is supported by the bracket 3 and is spaced from the front cover 11 . The bracket 3 surrounds the peripheral side of the sound-generating unit 2 and is sealed and fixed with the sound-generating unit 2 . The sound generating unit 2 , the bracket 3 , the front cover 11 and the rear cover 12 together form a rear sound cavity 102 .

In the above structure, the combined structure of the front cover 11 , the rear cover 12 and the bracket 3 , because the front cover 11 and the rear cover 12 are made of metal materials, the bracket 3 and the front cover 11 made of plastic materials are used. Fixed, used to support and fix the sounding unit 2, on the premise of ensuring the structural strength of the casing 1, it can be designed to be thinner than the all-plastic casing structure, and the front cover 11 and the rear cover 12 of metal materials can be By metal welding, there is no need to reserve more space for ultrasonic welding. While assembling the sounding unit 2 effectively, the volume of the cavity in the shell 1 is greatly increased, and the sounding unit is effectively increased. The volume of the rear acoustic cavity 102 enclosed by the body 2 and the housing 1 further improves the acoustic performance of the speaker box 100, especially the low-frequency acoustic performance.

Specifically, the rear cover 12 includes a rear cover plate 121 disposed opposite to the front cover 11 , and is bent and extended toward the front cover from the outer periphery of the rear cover plate 121 and is connected to the front cover 11 . The side wall 122 of the rear cover is fixedly connected. The side wall 122 of the rear cover abuts against the front cover 11 to form a sealing and fixing.

In this embodiment, the front cover 11 and the rear cover sidewall 122 of the rear cover 12 are welded to form a fixed shape. Compared with the plastic structure in the prior art, the front cover 11 and the rear cover 12 can be designed to be thinner, and The fixing strength is more reliable.

The bracket 3 is annular. The bracket 3 includes a bracket body portion 31 located in the housing 1 and fixed to the front cover 11 , and a bracket sound guide portion 32 extending from the bracket body portion 31 .

The bracket body portion 31 includes a bracket fixing portion 311 fixed to the front cover 11 and a bracket support portion 312 bent and extended from the outer periphery of the bracket fixing portion 311 toward the rear cover 12 .

The bracket fixing portion 311 is annular. The side of the sound generating unit 2 with the diaphragm 21 is supported by the bracket fixing portion 311 . The bracket fixing portion 311 is fixed to the front cover 11 . In this embodiment, the front cover 11 and the bracket 3 are integrally injection-molded. In other optional embodiments, the front cover 11 may also be fixed and sealed with the bracket 3 by gluing.

The bracket support portion 312 is bent and extended toward the rear cover 12 from the outer peripheral edge of the bracket fixing portion 311 . Specifically, the bracket support portion 312 surrounds the peripheral side of the sound-generating unit 2 and is sealed and fixed with the sound-generating unit 2 , so that the rear acoustic cavity 102 forms a closed space, so as to improve the low-frequency acoustics of the speaker box 100 performance.

Specifically, the bracket support portion 312 includes a support portion body 3121 that is bent and extended from the bracket fixing portion 311 and is annular, and a peripheral edge of the support portion body 3121 along the circumference of the sounding unit 2 laterally A support portion extending wall 3122 is bent and extended in the direction of the rear cover plate 121 and is annular, and the support portion extending wall 3122 forms a seal with the peripheral side of the sounding unit 2 . This structure makes the sealing between the sounding unit 2 and the bracket supporting part 312 more firm and reliable.

More preferably, the arrangement of the interconnected bracket fixing portion 311 and the bracket supporting portion 312 can better fix the sounding unit 2 to the front cover 11 on the one hand, and can also be used to set the front sound cavity 101 and the rear sound cavity 101 on the other hand. The size of the acoustic cavity 102 further improves the acoustic performance of the speaker box 100 .

The sound guiding portion 32 of the bracket is formed by extending from the extending wall 3122 of the support portion. The back cover side wall 122 abuts against the bracket sound guiding portion 32 to form a sealing and fixing. Specifically, the sound guiding portion 32 of the bracket is sealed and fixed at the joint between the side wall 122 of the rear cover and the front cover 11 . The sound guiding portion 32 of the bracket penetrates the casing 1 along a direction perpendicular to the vibration direction of the diaphragm 21 and is at least partially exposed to the casing 1 . This structure forms a side-emitting sound-emitting structure of the speaker box 100 , which is beneficial to the flexible assembly of the speaker box 100 in the whole machine, so that the sound-emitting effect of the speaker box 100 is good. Specifically, the sound guiding portion 32 of the bracket is disposed through the side wall 122 of the rear cover. The sound guide portion 32 of the bracket is provided with a sound guide channel 320 extending therethrough, and the sound guide channel 320 communicates the front sound cavity 101 with the outside world. This structure makes the shape of the speaker box 100 of the present invention match the shape of the whole machine, thereby making the speaker box 100 easy to use.

In order to further improve the low-frequency acoustic performance of the speaker device 100, the speaker box 100 further includes a ventilating spacer 4 located in the rear acoustic cavity 102, the ventilating spacer 4 is attached to the sound-emitting unit 2 and the The sound-generating unit 2 is separated from the rear sound cavity 102 , so that the rear sound cavity 102 can be filled with sound-absorbing materials.

Specifically, the ventilating spacer 4 includes a spacer body 41 that is spaced apart from the rear cover 121 and is attached to the sounding unit 2 , and a direction from the periphery of the spacer body 41 to the bracket 3 . Bend the extending spacer extension 42 . The spacer extension portion 42 is spaced apart from the back cover side wall 122 and fixed to the bracket support portion 312 . Specifically, the spacer extension portion 42 is fixed to a side of the support portion extension wall 3122 away from the front cover 11 . The breathable spacer 4 , the bracket 3 , the front cover 11 and the rear cover 12 together form a powder filling space, and the powder filling space is used for filling sound-absorbing materials, such as sound-absorbing particles, sound-absorbing cotton, and the like.

In order to further improve the air pressure balance between the rear acoustic cavity 102 and the outside, the housing 1 is provided with a powder filling hole 13 therethrough, and the powder filling hole 13 communicates with the rear acoustic cavity 102 . In this embodiment, the powder filling hole 13 is disposed on the side wall 122 of the rear cover. The speaker box 100 further includes a sealing cover 5 attached to the casing 1 , and the sealing cover 5 completely covers the powder filling hole 13 . The sealing cover 5 can seal the powder filling hole 13 after the sound-absorbing material is filled into the powder filling space through the powder filling hole 13 , thereby making the assembly of the speaker box 100 easier. Simple and reliable.

The speaker box 100 further includes a conductive terminal 6 for connecting the sound generating unit 2 with external electrical signals. The conductive terminals 6 penetrate through the casing 1 and are partially exposed to the casing 1 .

In this embodiment, the side wall 122 of the rear cover is provided with a receiving groove 120 formed by the end of the side wall 122 close to the front cover 11 which is recessed toward the rear cover plate 121 . The conductive terminals 6 pass through the receiving groove 120 . Extending from the inside to the outside of the casing 1 , the front cover 11 is simultaneously press-fitted on the conductive terminals 6 and the side wall 122 of the rear cover to form a sealing and fixing. The structure is convenient for assembly and improves assembly efficiency.

Compared with the related art, in the speaker box of the present invention, the front cover and the rear cover of the casing are made of metal materials, and are fixed to the front cover by brackets made of plastic materials to support and fix the sound-producing unit. In the structure, the plastic bracket is combined with the metal front cover, and the metal front cover is combined with the metal rear cover. On the premise of ensuring the structural strength of the shell, it can be designed to be thinner than the all-plastic shell structure, so that The volume of the cavity in the casing is greatly increased, and the volume of the rear acoustic cavity enclosed by the sound generating unit and the casing is effectively increased, thereby improving the acoustic performance of the speaker box, especially the low-frequency acoustic performance. In addition, in the speaker box of the present invention, the bracket is arranged into three parts: the main body part of the bracket and the sound guiding part of the bracket, wherein, on the one hand, the sound generating unit can be better fixed to the front cover through the arrangement of the main body part of the bracket. On the other hand, it can also be used to set the volume of the front acoustic cavity and the rear acoustic cavity, thereby improving the acoustic performance of the speaker box; The sound guide part is at least partially exposed on the casing, and this structure makes the shape of the speaker box of the present invention match the shape of the whole machine, thereby making the speaker box easy to use.

The above are only the embodiments of the present invention. It should be pointed out 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 belong to the present invention. scope of protection.

Claims

A loudspeaker box, comprising a shell and a sound-generating unit fixedly accommodated in the shell, the sound-generating unit comprising a diaphragm for vibrating and sounding, characterized in that the shell is made of a metal material, The housing includes a front cover and a rear cover respectively covered on opposite sides of the sound-generating unit along the vibration direction of the diaphragm, and the speaker box further includes a ring-shaped bracket made of plastic material, The bracket includes a bracket main body part located in the casing and fixed to the front cover, and a bracket sound guide part extending from the bracket main body part; the side of the sound generating unit with the diaphragm is supported on the The bracket is arranged at an interval from the front cover, the bracket surrounds the peripheral side of the sound-generating unit and is sealed and fixed with the sound-generating unit, and the sound-guiding part of the bracket vibrates perpendicular to the vibrating membrane. The direction penetrates through the casing and is at least partially exposed to the casing, and the sound guiding part of the bracket is provided with a sound guiding channel passing through it; the sound producing unit, the bracket and the front cover together form a front The sound cavity, the sound generating unit, the support, the front cover and the rear cover together form a rear sound cavity, and the sound guide channel communicates the front sound cavity with the outside world.
The speaker box according to claim 1, wherein the main body portion of the bracket comprises a bracket fixing portion fixed to the front cover, and a bracket fixing portion that is bent and extended from the outer periphery of the bracket fixing portion toward the rear cover. Bracket support.
The speaker box according to claim 1, wherein the rear cover comprises a rear cover plate opposite to the front cover, and a rear cover plate is bent and extended in the direction of the front cover from the outer peripheral edge of the rear cover plate The side wall of the rear cover is fixedly connected to the front cover. Sealed and fixed.
The speaker box according to claim 1, wherein the front cover and the bracket are integrally injection-molded.
The speaker box according to claim 2, wherein the bracket support part comprises a support part body that is bent and extended from the bracket fixing part and is annular, and a support part body formed by the outer periphery of the support part body along the The peripheral side of the sounding unit is bent and extended in the direction of the rear cover plate and is a ring-shaped support portion extension wall, the bracket sound guide portion is connected with the support portion extension wall, and the support portion extension wall is connected with the support portion extension wall. The peripheral side of the sound-emitting element forms a seal.
The speaker box according to claim 1, characterized in that, the speaker box further comprises a ventilating spacer located in the rear acoustic cavity, the ventilating spacer being attached to the sounding unit and making the sounding unit The body is separated from the rear acoustic cavity.
The loudspeaker box according to claim 5, wherein the ventilating insulator comprises an insulator body which is spaced apart from the rear cover and is attached to the sound-generating unit, and a peripheral edge formed by the insulator body. The spacer extension part bent and extended toward the bracket; the spacer extension part and the side wall of the back cover are spaced apart and fixed to the bracket support part; the breathable spacer, the bracket, the The front cover and the rear cover together form a powder filling space, and the powder filling space is used to fill the sound-absorbing material.
The speaker box according to claim 6, wherein the shell is provided with a powder filling hole therethrough, and the powder filling hole communicates the rear acoustic cavity with the outside world; the speaker box further comprises a For the sealing cover of the casing, the sealing cover completely covers the powder filling hole.
The speaker box according to claim 8, wherein the powder filling hole is arranged on the side wall of the rear cover.
The speaker box according to claim 3, characterized in that, the speaker box further comprises a conductive terminal for connecting the sound generating unit with an external electrical signal, the conductive terminal penetrates through the casing and is partially exposed to the case.
The speaker box according to claim 10, wherein the side wall of the back cover is provided with a receiving groove formed by the end of the back cover that is close to the front cover and is recessed toward the back cover plate, and the conductive terminals are passed through the The accommodating groove extends to the outside of the casing, and the front cover is simultaneously press-fitted on the conductive terminal and the side wall of the rear cover to form a sealing and fixing.