WO2022041432A1

WO2022041432A1 - Loudspeaker box

Info

Publication number: WO2022041432A1
Application number: PCT/CN2020/123383
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: 2020-10-23
Publication date: 2022-03-03
Also published as: CN112004169B; CN112004169A

Abstract

The present invention provides a loudspeaker box, comprising a shell and a sound production unit fixedly accommodated in the shell. The sound production unit comprises a vibrating diaphragm for vibrating to generate a sound; the shell is made of a metal material; the shell comprises a first support, and a front cover and a rear cover which respectively cover two opposite sides of the first support in a vibration direction of the vibrating diaphragm; the first support is provided with a through hole penetrating through the first support; the side, provided with the vibrating diaphragm, of the sound production unit faces the through hole and is supported and fixed on the first support; the front cover comprises a front cover plate which is arranged opposite to and spaced apart from the sound production unit, and a front cover side wall which bends and extends from the periphery of the front cover plate to the first support and is fixed on the first support; the front cover side wall is provided with a sound outlet which penetrates through the front cover side wall; the front cover, the sound production unit and the first support jointly define a front acoustic cavity, and the front acoustic cavity is communicated with the outside by means of the sound outlet. The sound production unit, the first support and the rear cover jointly define a rear acoustic cavity. 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-generating unit is sealed by ultrasonic welding. Ultrasonic welding requires more volume, thus limiting the volume design of the front cavity and the rear cavity. This 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 and a sound-generating unit fixedly accommodated in the housing, the sound-generating unit includes a diaphragm for vibrating and producing sound; the housing is Made of metal material, the housing includes a first bracket and a front cover and a rear cover that are respectively covered on opposite sides of the first bracket along the vibration direction of the vibrating membrane, and the first bracket is provided with a pass through the first bracket. the through hole on the sound-generating unit; the side of the sound-generating unit with the vibrating membrane faces the through-hole and is supported and fixed on the first bracket; the front cover includes a front cover arranged opposite to the sound-generating unit a cover plate and a front cover side wall extending from the periphery of the front cover plate to the first bracket and fixed to the first bracket, and the front cover side wall is provided with a sound outlet passing through it; The front cover, the sounding unit and the first bracket together form a front sound cavity, and the sound outlet communicates the front sound cavity with the outside world; the sounding unit, the first branch and the The rear cover together forms the rear acoustic cavity.

Preferably, the back cover includes a back cover plate opposite to the sounding unit at intervals, and a back cover side wall bent and extended from a peripheral edge of the back cover plate, the back cover side wall abuts against the first a bracket and form a fixed seal.

Preferably, the first bracket includes an annular bracket body, an annular bracket side wall bent and extended from the outer peripheral edge of the bracket body toward the rear cover, and an inner peripheral edge of the bracket body The bracket fixing part, which is bent and extended in the direction of the front cover and surrounds the through hole, and the end of the side wall of the bracket facing the sound outlet and close to the rear cover is far from the sound The bracket extension part of the single body is bent and extended, the sounding monomer is supported on the bracket fixing part and forms a fixed seal, the front cover side wall is supported and fixed on the bracket body, and the front cover side wall is provided with a fixed seal. One side of the sound outlet is supported and fixed on the extension part of the bracket; the side wall of the rear cover is supported and fixed on the side wall of the bracket, and the side wall of the rear cover is opposite to the side wall of the front cover and is provided with the outlet. A part of one side of the sound port is supported and fixed to the bracket extension part; the front cover side wall and the rear cover are fixed to the bracket side wall and the bracket extension part respectively to form a sealing structure.

Preferably, the speaker box further includes a second bracket and a ventilating spacer located in the rear acoustic cavity, the second bracket is disposed around the periphery of the sound-generating unit, and the second bracket includes a second bracket located in the sound-generating unit. The first section of the unit away from the sound outlet, and the second section and the third section that are bent and extended from the opposite ends of the first section along the sounding unit toward the sound outlet respectively. , the first section is arranged opposite to the bracket extension; the second bracket is fixed to the bracket body, and the second section and the third section are respectively abutted and fixed to the bracket side wall; The air-permeable spacer is fixed to the bracket body and the bracket extension and separates the sound-generating unit from the rear acoustic cavity.

Preferably, the first bracket and the second bracket are integrally injection-molded.

Preferably, a side of the second bracket away from the front cover is flush with a side of the bracket extension portion away from the front cover.

Preferably, the air-permeable spacer includes a spacer body that is spaced apart from the back cover and is attached to the sound-generating unit, and an spacer extension that is bent and extended from the periphery of the spacer body toward the bracket. and a spacer fixing portion bent and extended from one end of the spacer extension portion away from the spacer body; the spacer extension portion is spaced from the side wall of the front cover, and the spacer fixing portion is attached to the spacer at the same time. is fixed on the side of the first bracket close to the rear cover and the side of the bracket extension part close to the rear cover; the ventilation spacer, the first bracket, the second bracket and the The back cover together forms a powder filling space, and the powder filling space is used for filling the sound-absorbing material.

Preferably, the speaker box further includes a conductive member for connecting the sound-emitting unit with an external electrical signal, the conductive member includes a conductive member body supported and fixed on one end of the second section close to the back cover, and the conductive member is The two ends of the conductive part body extend toward the sound-generating unit and are fixed and electrically connected to the connecting arm; the side wall of the cover and the extension arm of the side wall of the bracket; the side of the second segment close to the rear cover is recessed to form a receiving groove, and the conductive member body is arranged in the receiving groove and makes the conductive member body The second bracket is flush with the side of the second bracket close to the back cover, and the spacer extension portion is simultaneously press-fitted and fixed to the conductive member body and the second bracket.

Preferably, the extension arm penetrates through the side wall of the front cover and the side wall of the rear cover at the same time.

beneficial effect

Compared with the related art, in the speaker box of the present invention, the front cover, the rear cover and the first bracket of the casing are all made of metal materials, the first bracket is provided with a through hole, and the sound generating unit is provided with a diaphragm of the diaphragm. One side faces the through hole and is supported and fixed on the first bracket, the front cover and the rear cover are respectively covered on opposite sides of the first bracket, and the side wall of the front cover of the front cover is provided with a sound outlet to form a side sound structure, In the above structure, the metal first bracket is combined with the metal rear cover, and the metal rear cover is combined with the metal first bracket. On the premise of ensuring the structural strength of the shell, it can be designed to be as good as the all-plastic shell structure. Thinner, which greatly increases the volume of the cavity in the casing, effectively increases the volume of the rear acoustic cavity enclosed by the sounding unit and the casing, thereby improving the acoustic performance of the speaker box, especially Low frequency acoustic performance.

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 an enlarged view of the part shown in B in FIG. 3 .

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 accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, 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. 1-4 at the same time, the present invention provides a speaker box 100 , which includes a casing 1 and a sounding unit 2 having a diaphragm 21 fixedly accommodated in the casing 1 .

The casing 1 is made of metal material. The housing 1 includes a front cover 11 , a rear cover 12 and a first bracket 13 . The front cover 11 and the rear cover 12 are respectively covered on opposite sides of the first bracket 13 along the vibration direction of the diaphragm 21 .

Specifically, the front cover 11 includes a front cover plate 111 disposed opposite to the sounding unit 2 at a distance, and a front cover plate 111 is bent and extended in the direction of the first bracket 13 from the periphery of the front cover plate 111 and is fixed to the The side wall 112 of the front cover of the first bracket 13 is described.

The front cover plate 111 and the front cover side wall 112 can be separated into two parts, or can be made in one piece. In this embodiment, the front cover plate 111 and the front cover side wall 112 are integrally formed.

The sounding unit 2 , the first bracket 13 and the front cover 11 together form a front sound cavity 101 . The diaphragm 21 is accommodated in the front acoustic cavity 101 , and the front cover side wall 112 is provided with a sound outlet 10 extending therethrough, and the sound outlet 10 communicates the front acoustic cavity 101 with the outside world. This structure The side-emitting structure of the speaker box 100 is formed, in order to improve the air smoothness between the side-emitting sound and the outside world, the audio quality of the speaker box 100 is improved.

In this embodiment, the side of the front cover side wall 112 where the sound outlet 10 is provided is flush with the rear cover 12 connected thereto. This arrangement makes the speaker box 100 easy to assemble and has a beautiful appearance.

The back cover 12 includes a back cover plate 121 opposite to the sounding unit 2 at a distance and a back cover side wall 122 bent and extended from the periphery of the back cover plate 121 . The back cover side wall 122 abuts against the first bracket 13 and forms a fixed seal. The sound generating unit 2 , the first bracket 13 and the rear cover 12 together form a closed rear sound cavity 102 .

In this embodiment, the rear cover 12 is fixed by welding with the first bracket 13 , the side wall 11 of the front cover is fixed by welding with the first bracket 13 , and the front cover 11 and the rear cover 12 are relatively The plastic structure in the technology can be designed to be thinner, and the fixing strength is more reliable.

In the above structure, the combined structure of the front cover 11 , the rear cover 12 and the first bracket 13 , because the front cover 11 and the rear cover 12 are made of metal materials, the first bracket 13 made of metal materials is used. It is fixed with the rear cover 11 to support and fix the sounding unit 2 and form the rear sound cavity 102 , and then the first bracket 13 made of metal material is fixed with the front cover 11 to form the front sound cavity 101 , in order to ensure the structural strength of the casing 1 On the premise, compared with the all-plastic shell structure, it can not only be designed to be thinner, but also effectively assemble the sound-emitting unit 2, thereby greatly increasing the volume of the cavity in the shell 1 and effectively increasing the sound output. The volume of the rear acoustic cavity 10 enclosed by the single unit 2 and the housing 1 further improves the acoustic performance of the speaker box 100 , especially the low-frequency acoustic performance.

Specifically, the first bracket 13 includes a through hole 130 extending therethrough, an annular bracket body 131 , and an annular bracket body 131 bent and extended from the outer periphery of the bracket body 131 toward the rear cover 12 . The bracket side wall 132 , the bracket fixing portion 133 that is bent and extended from the inner periphery of the bracket body 131 toward the front cover 11 and surrounds the through hole 130 , and the bracket side wall 132 is facing the outlet. One side of the sound port 10 is away from the bracket extension portion 134 that is bent and extended from the sound generating unit 2 .

The side of the sound generating unit 2 with the diaphragm 21 faces the through hole 130 and is supported and fixed to the first bracket 130 . That is to say, the first bracket 13 is sealed and fixed with the sounding unit 2 .

The front cover side wall 112 is supported and fixed to the bracket body 131 , and the side of the front cover side wall 112 with the sound outlet 10 is supported and fixed to the bracket extension 134 ; the rear cover side wall 122 is supported and fixed to the bracket side wall 132 , and the portion of the rear cover side wall 122 facing the front cover side wall 112 where the sound outlet 10 is provided is supported and fixed to the bracket extension portion 134 . This structure makes a partial dislocation bridge formed when the front cover 11 and the rear cover 12 are connected by the first bracket 13 , so that the volume of the rear acoustic cavity 102 is increased and the design of the rear acoustic cavity 102 is more flexible.

In this embodiment, the side of the front cover side wall 112 close to the rear cover 12 is provided with an escape groove 1120 recessed in a direction away from the bracket body 131 . The bracket body 131 and the bracket side wall 132 are accommodated and fixed in the escape groove 1120 . The side wall of the front cover 112 with the sound outlet 10 is covered and fixed to the bracket extension 134 . This structure utilizes the height difference between the bracket extension portion 134 and the bracket body 131, and sets the avoidance groove 1120 through the front cover side wall 112 for assembly, which is beneficial to reduce the thickness of the speaker box 100 and improve the miniaturization design. Okay.

The diaphragm 21 of the sound-generating unit 2 is used for vibrating and sounding. Specifically, the vibrating membrane 21 includes a vibrating portion 211 , a ring portion 212 that is bent and extended from the periphery of the vibrating portion 211 , and a ring portion 212 that is bent and extended in a direction away from the vibrating portion 211 . Diaphragm fixing part 213 . The sounding unit 2 is supported on the bracket fixing part 133 and forms a fixed seal. Specifically, the bracket fixing part 133 is fixed on the diaphragm fixing part 213, so that the first bracket 13, the The membrane 21 , the first bracket 13 and the front cover 11 together form the front acoustic cavity 101 , which makes the speaker box 100 easy to assemble and has high reliability.

The speaker box 100 further includes a second bracket 3 located in the rear acoustic cavity 102 . The second bracket 3 is made of plastic material. The first bracket 13 and the second bracket 3 can be separately manufactured and fixed together. Of course, it is not limited to this. In this embodiment, the first bracket 13 and the second bracket 3 are integrally injection-molded. This structure makes the speaker enclosure 100 simpler to manufacture and easier to assemble.

The second bracket 3 is located in the rear acoustic cavity 102 . The second bracket 3 is fixed to the first bracket 13 . The second bracket 3 surrounds the peripheral side of the sounding unit 2 . The second bracket 3 includes a first section 31 located on the side of the sound-generating unit 2 away from the sound outlet 10 , and opposite ends of the first section 31 are respectively located along the sound-generating unit 2 toward each other. Describe the second section 32 and the third section 33 that are bent and extended in the direction of the sound port 10 .

The second bracket 3 is fixed to the bracket body 131 and the second section 32 and the third section 33 are respectively abutted and fixed to the bracket side wall 132 . The first segment 31 is disposed opposite to the bracket extension portion 134 . The front cover side wall 112 and the rear cover 12 are respectively fixed to the bracket side wall 132 and the bracket extension portion 134 to form a sealing structure.

In order to further improve the low-frequency acoustic performance of the speaker box 100 , the speaker box 100 further includes a ventilating spacer 4 located in the rear acoustic cavity 102 . The air-permeable spacer 4 is fixed to the bracket body 131 and the bracket extension portion 134 and separates the sound-generating unit 2 from the rear acoustic cavity 102 , so that the rear acoustic cavity 102 can be filled with sound-absorbing materials.

In this embodiment, the side of the second bracket 3 away from the front cover 11 is flush with the side of the bracket extension 134 away from the front cover 11 . That is to say, the side of the first segment 31 away from the front cover 11 , the side of the second segment 32 away from the front cover 11 , and the side of the third segment 33 away from the front cover 11 . Both sides are flush with the side of the bracket extension portion 134 away from the front cover 11 . This structure makes the air-permeable spacer 4 adhere to the first bracket 13 and the second bracket 3 with higher sealing reliability and is easy to assemble.

Specifically, the ventilating spacer 4 includes a spacer body 41 that is spaced apart from the back cover 12 and is attached to the sound-generating unit 2 , and a spacer body 41 that is bent toward the bracket 3 from the periphery of the spacer body 41 . The spacer extension portion 42 that is folded and extended and the spacer fixing portion 43 that is bent and extended from one end of the spacer extension portion 42 away from the spacer body 41 . The spacer extension portion 42 is spaced apart from the side wall 112 of the front cover. The spacer fixing portion 43 is attached and fixed to the side of the first bracket 13 close to the rear cover 12 and the side of the bracket extension portion 134 close to the rear cover 12 at the same time. The breathable spacer 4 , the first bracket 13 , the second bracket 3 and the back 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.

The speaker box 100 further includes a conductive member 5 that connects the sound generating unit 2 with external electrical signals.

In this embodiment, the conductive member 5 includes a conductive member body 51 supported and fixed on one end of the second section 32 close to the back cover 12 . The connecting arm 52 that extends in the direction and is fixed and electrically connected to the sound-generating unit 2 and extends away from the sound-generating unit 2 from the conductor body 51 and simultaneously penetrates the back cover side wall 122 and the bracket side Extension arm 53 of wall 132 . The rear cover 12 includes a rear cover body 121 disposed opposite to the spacer body 41 , and a peripheral edge of the rear cover body 121 is bent and extended toward the front cover 11 and is connected to the front cover side wall 112 . Abutting against the fixed rear cover side wall 122 .

In this embodiment, the extension arm 53 penetrates through the front cover side wall 112 and the rear cover side wall 122 at the same time. The structure is convenient to assemble, and the position penetrating the outer side wall 112 of the front cover and the position penetrating the side wall 122 of the rear cover can be used as assembling positions in advance, so as to improve the assembling efficiency.

In order to form an effective seal when the air-permeable spacer 4 is fixed with the bracket 3 and ensure that the sound-absorbing material in the powder filling space does not enter the sound-emitting unit 2 and affect its performance, in this embodiment, the second bracket 3 One side of the second segment 32 close to the rear cover 12 is recessed to form a receiving groove 320 . The conductive member body 51 is disposed in the receiving slot 320 so that the conductive member body 51 is flush with the side of the second bracket 3 close to the rear cover 12 . The spacer extension portion 42 is simultaneously press-fitted and fixed to the conductive element body 51 and the second bracket 3 .

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 comprises a first bracket, a front cover and a rear cover respectively covered on opposite sides of the first bracket along the vibration direction of the diaphragm, and the first bracket is provided with a through hole passing through it; The side of the sound-generating unit with the diaphragm facing the through hole is supported and fixed to the first bracket; the front cover includes a front cover plate arranged opposite to the sound-generating unit at an interval and a The peripheral edge of the front cover plate is bent and extended toward the first bracket and fixed on the side wall of the front cover of the first bracket, and the side wall of the front cover is provided with a sound outlet passing through it; the front cover, The sound-generating unit and the first bracket together form a front sound cavity, and the sound outlet communicates the front sound cavity with the outside world; the sound-generating unit, the first branch and the back cover together form a rear voice.
The loudspeaker box according to claim 1, wherein the rear cover comprises a rear cover plate opposite to the sound-generating unit and a rear cover side wall bent and extended from the periphery of the rear cover plate, so The side wall of the rear cover abuts against the first bracket and forms a fixed seal.
The speaker box according to claim 2, wherein the first bracket comprises an annular bracket body, an annular bracket bent and extended from the outer periphery of the bracket body toward the rear cover a side wall, a bracket fixing part that is bent and extended toward the front cover from the inner periphery of the bracket body and surrounds the through hole, and the side facing the sound outlet from the bracket side wall and is close to the One end of the back cover is bent and extended away from the sound-generating unit, the sound-generating unit is supported on the support fixing part and forms a fixed seal, and the front cover side wall is supported and fixed on the support The side wall of the main body and the side wall of the front cover with the sound outlet is supported and fixed to the extension part of the bracket; the side wall of the rear cover is supported and fixed to the side wall of the bracket and the side wall of the rear cover is facing The part of the side wall of the front cover provided with the sound outlet is supported and fixed to the bracket extension part; the side wall of the front cover and the rear cover are both fixed to the side wall of the bracket and the bracket respectively The extension forms a sealing structure.
The speaker box according to claim 3, wherein the speaker box further comprises a second bracket and a ventilating spacer located in the rear acoustic cavity, the second bracket is disposed around the periphery of the sound-generating unit , the second bracket includes a first section located on the side of the sound-emitting unit away from the sound outlet, and the opposite ends of the first section are respectively directed from the sound-emitting unit to the sound outlet The second and third sections are bent and extended, and the first section is arranged opposite to the bracket extension; the second bracket is fixed to the bracket body and makes the second section and the third section are respectively abutted and fixed on the side walls of the bracket; the air-permeable spacer is fixed on the bracket body and the bracket extension and separates the sound-generating unit from the rear acoustic cavity.
The speaker box according to claim 4, wherein the first bracket and the second bracket are integrally injection-molded.
The speaker box according to claim 4, wherein a side of the second bracket away from the front cover is flush with a side of the bracket extension away from the front cover.
The loudspeaker box according to claim 4, wherein the ventilating spacer comprises a spacer body opposite to the back cover and attached to the sound-generating unit, and a spacer body extending from a peripheral edge of the spacer body to the spacer body. a spacer extension part bent and extended in the bracket direction and a spacer fixing part bent and extended from one end of the spacer extension part away from the spacer body; the spacer extension part and the side wall of the front cover The spacers are arranged at intervals, and the spacer fixing part is attached and fixed to the side of the first bracket close to the back cover and the side of the support extension part close to the back cover at the same time; the breathable spacer, the The first bracket, the second bracket and the back 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 7, characterized in that, the speaker box further comprises a conductive member for connecting the sound generating unit with an external electrical signal, and the conductive member comprises a conductive member supported and fixed on the second section close to the The conductive member body at one end of the back cover, the connecting arm extending from the two ends of the conductive member body towards the sound-emitting unit and being fixed and electrically connected to the sound-emitting unit, and the conductive member body extending away from the The sounding unit extends in the direction and penetrates the extension arm of the side wall of the back cover and the side wall of the bracket at the same time; the side of the second section close to the back cover is recessed to form a receiving groove, and the main body of the conductive member is arranged on the side of the back cover. The conductive element body is flush with the side of the second bracket close to the rear cover in the receiving groove, and the spacer extension portion is pressed and fixed to the conductive element body and the second bracket at the same time. .
The speaker box according to claim 8, wherein the extension arm penetrates both the side wall of the front cover and the side wall of the rear cover.