WO2021243748A1

WO2021243748A1 - Loudspeaker box

Info

Publication number: WO2021243748A1
Application number: PCT/CN2020/095884
Authority: WO
Inventors: 刘庆
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声精密制造科技(常州)有限公司
Priority date: 2020-06-03
Filing date: 2020-06-12
Publication date: 2021-12-09
Also published as: CN212278401U

Abstract

The utility model provides a loudspeaker box, comprising an upper cover plate, a lower cover plate which is fitted to the upper cover plate and encloses an accommodating space together with the upper cover plate, a sound generation unit accommodated in the accommodating space, and an antenna flexible circuit board fixed on the upper cover plate. The upper cover plate comprises first through holes penetrating through the upper cover plate; the antenna flexible circuit board comprises a first section attached to the side of the upper cover plate away from the sound generation unit and a second section reversely bent and extending from the first section, and the second section passes through the first through holes and is attached to the side of the upper cover plate close to the sound generation unit; the lower cover plate comprises a lower cover plate body portion which is fitted to the upper cover plate and encloses the accommodating space together with the upper cover plate, and a pressing wall extending outward from the periphery of the lower cover plate body portion; and the pressing wall is pressed on the second section to fix the second section onto the upper cover plate. Compared with the related art, the loudspeaker box in the utility model reduces the processing cost while simplifying the assembling process of the antenna flexible circuit board.

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 an accommodating space, a sounding unit accommodated in the accommodating space, and an antenna flexible circuit board fixedly connected to the upper cover.

technical problem

However, the antenna flexible circuit board in the speaker box of the related art is fixed to the upper cover by adhesive bonding. In order to prevent the antenna flexible circuit board from warping due to the failure of the adhesive for a long time, the existing solution is to install the upper cover The hot spot post further fixes the antenna flexible circuit board. However, using this method to solve the problem of the antenna flexible circuit board warping requires an additional hot spot process, which in turn increases the processing cost of the speaker box.

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 speaker box with low processing cost and high assembly efficiency.

In order to achieve the above objective, the present invention provides a speaker box, which includes an upper cover plate, a lower cover plate covering the upper cover plate and jointly enclosing a receiving space, and a sounding unit housed in the receiving space Body and an antenna flexible circuit board fixed to the upper cover plate, the upper cover plate includes a first through hole penetrating therethrough; the antenna flexible circuit board includes a The first section on one side of the body and the second section extending in the opposite direction from the first section, the second section passes through the first through hole and is attached to the upper cover plate close to the sound One side of the single body; the lower cover includes a lower cover body that covers the upper cover and which collectively encloses the accommodating space, and a pressure extending outward from the periphery of the lower cover body The wall is pressed on the second section to fix the second section on the upper cover plate.

Preferably, the upper cover plate includes an upper cover body portion provided with the first through hole and a fixing step protruding and extending from a side of the upper cover body portion close to the sound emitting unit, the The second section is attached and fixed to the fixed step.

Preferably, the upper cover plate further includes an upper cover plate side wall bent and extended from the upper cover plate body to the lower cover plate, and the lower cover plate body is provided on the side of the upper cover plate. Wall, and the lower cover main body, the upper cover side wall, and the upper cover main body jointly enclose the receiving space, and the pressing wall is away from the lower cover main body from the lower cover main body. The direction of the containment space extends.

Preferably, the first through holes include two and are arranged opposite to each other at intervals, the fixed steps include two, the two fixed steps are located between the two first through holes, and the two first through holes A through hole is respectively connected to the two fixed steps; the second section includes two, and the two second sections extend from opposite ends of the first section and respectively pass through the two first sections. A through hole is attached to the two fixed steps.

Preferably, the second section includes an extension wall sandwiched and fixed between the fixing step and the pressing wall, and a connection that passes through the first through hole and connects the first section and the extension wall The antenna flexible circuit board further includes a pad arranged on the extension wall.

Preferably, the upper cover plate further includes a receiving groove formed by a recessed side of the upper cover body portion away from the sound emitting unit, the first through hole is provided through the receiving groove, and the first The section is arranged in the containing groove.

Preferably, the upper cover plate further includes a ring-shaped support wall protrudingly extended from the upper cover body portion in the direction of the lower cover plate, and the sound-producing monomer is supported and fixed to the support wall.

Preferably, the lower cover plate further includes a second through hole penetrating the body portion of the lower cover plate, and the sound emitting monomer is partially exposed to the receiving space through the second through hole.

Preferably, the lower cover plate and the upper cover plate are fixed by ultrasonic welding.

Preferably, the lower cover plate is made of plastic material.

Beneficial effect

Compared with the related art, in the speaker box of the present invention, the lower cover plate includes a lower cover body part that is arranged on the upper cover plate and jointly encloses an accommodating space, and is formed by the lower cover body part. A pressing wall extending outward from the periphery; the lower cover body portion and the upper cover body portion are fixed by ultrasonic welding, and the pressing wall is pressed on the second section to fix the second section For the upper cover plate, the arrangement of this structure strengthens the fixing fastness of the antenna flexible circuit board and the upper cover plate, prevents the antenna flexible circuit board from warping, and further improves the The stability of the speaker box. On the other hand, with this structure, there is no need to install a hot spot on the upper cover plate to further fix the antenna flexible circuit board, which reduces a hot spot process, thereby reducing the processing cost.

Description of the drawings

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

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

Figure 2 is an enlarged view of part B shown in Figure 1;

Figure 3 is an exploded schematic diagram of a part of the three-dimensional structure of the speaker box of the present invention;

Figure 4 is an exploded schematic view of a part of the three-dimensional structure of the speaker box from another perspective of the present invention;

Figure 5 is a cross-sectional view taken along the line A-A in Figure 1;

Fig. 6 is an enlarged view of the part C shown in Fig. 5.

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. 1-6 at the same time. The present invention provides a speaker box 100, which includes an upper cover plate 1, a lower cover plate 2 which is covered on the upper cover plate 1 and which jointly encloses the accommodating space 10; The sound emitting unit 3 in the receiving space 10 and the antenna flexible circuit board 4 fixed to the upper cover 1.

The upper cover plate 1 includes a first through hole 11 passing through it.

The lower cover plate 2 includes a lower cover plate body portion 21 that covers the upper cover plate 1 and collectively encloses the receiving space 10, and a pressing wall extending outward from the periphery of the lower cover plate body portion 21 twenty two.

The antenna flexible circuit board 4 includes a first section 41 attached to a side of the upper cover 1 away from the sound emitting unit 3, and a second section 42 extending in the opposite direction from the first section 41, The second section 42 passes through the first through hole 11 and is attached to the side of the upper cover plate 1 close to the sound emitting monomer 3.

In the above structure, the lower cover plate 2 and the upper cover plate 1 are fixed by ultrasonic welding, and the pressing wall 22 is pressed on the second section 42 to fix the second section 42 to the上盖板1. The arrangement of this structure strengthens the fixing fastness of the antenna flexible circuit 4 and the upper cover 1 and prevents the antenna flexible circuit board 4 from warping, thereby improving the stability of the speaker box. . On the other hand, with this structure, there is no need to install a hot spot on the upper cover 1 to further fix the antenna flexible circuit board 4, which reduces a hot spot process, thereby reducing the processing cost.

Specifically, the upper cover 1 includes an upper cover body portion 12 provided with the first through hole 11, and a side protruding and extending from the upper cover body portion 12 close to the sound emitting unit 3 The step 13 is fixed, and the second section 42 is attached and fixed to the step 13.

The upper cover plate 1 further includes an upper cover plate side wall 14 bent and extended from the upper cover plate body portion 12 toward the lower cover plate 2, and the lower cover plate body portion 21 is disposed on the upper cover Plate side wall 14, and the lower cover main body portion 21, the upper cover side wall 14 and the upper cover main body portion 12 jointly enclose the receiving space 10, and the pressing wall 22 extends from the lower The cover body 12 extends in a direction away from the receiving space 10.

In this embodiment, in order to avoid occupying the external space of the speaker box 100, the upper cover plate 1 further includes a receiving groove 15 formed by a recessed side of the upper cover body portion 12 away from the sound emitting unit 3, The first through hole 11 is formed through the receiving groove 15, and the first section 41 is provided in the receiving groove 15.

Further, the first through holes 11 include two and are arranged opposite to each other at intervals, the fixed steps 13 include two, and the two fixed steps 13 are located between the two first through holes 11, and the two Each of the first through holes 11 is connected to the two fixed steps 13; the second section 42 includes two, and the two second sections 42 extend from opposite ends of the first section 41, It passes through the two first through holes 11 and is attached to the two fixing steps 13 respectively.

Furthermore, the second section 42 includes an extension wall 421 sandwiched and fixed between the fixing step 13 and the pressing wall 22, and an extension wall 421 that passes through the first through hole 11 and is connected to the first section 41 The connecting wall 422 with the extension wall 421, the antenna flexible circuit board 4 further includes a pad 43 disposed on the extension wall 421.

In this embodiment, the lower cover 1 is made of plastic material. Of course, it is not limited to this.

In this embodiment, the speaker box further includes the flexible circuit board 5, and the flexible circuit board 5 includes a lead connection portion 51 located in the receiving space 10 and fixed to form an electrical connection with the sound emitting unit 3 , The bending portion 52 bent and extended from the lead connection portion 51 toward the upper cover 1 and the lead connection for connecting an external power source that is bent and extended from the bending portion 52 to the outside of the receiving space 10 The portion 53, the bending portion 52 and the guiding portion 53 are all attached to the upper cover 1. The structure design of the flexible circuit board 5 makes the lower cover plate 2 and the upper cover plate 1 have no influence on the bending portion 52 and the guiding portion 53 when they are fixed by ultrasonic welding, thus avoiding all problems. The fracture of the flexible circuit board 5 improves the yield of the speaker box.

In order to improve the fixing strength of the flexible circuit board 5 and the upper cover 1 and further improve the stability of the speaker box, the bent portion 52 is provided with a positioning hole 521 passing through it, and the upper A side of the cover plate 1 close to the lower cover plate 2 is provided with a positioning post 16 that cooperates with the positioning hole 521, and the positioning post 16 is inserted into the positioning hole 521.

In this embodiment, the upper cover 1 further includes a ring-shaped support wall 17 protrudingly extended from the upper cover body 11 toward the lower cover 2, and the sound emitting monomer 3 supports It is fixed to the supporting wall 17.

More preferably, the lower cover plate 2 further includes a second through hole 23 penetrating through the lower cover body portion 21, and a part of the sound emitting monomer 3 leaks out of the receiving space through the second through hole 23 10. The arrangement of this structure reduces the overall height of the speaker box, effectively improves the internal space utilization rate, and facilitates the miniaturized design of the speaker box 100.

Compared with the related art, in the speaker box of the present invention, the lower cover plate includes a lower cover body part that is arranged on the upper cover plate and jointly encloses an accommodating space, and is formed by the lower cover body part. A pressure wall extending outward from the periphery; the lower cover plate and the upper cover plate are fixed by ultrasonic welding, and the pressure wall is pressed on the second section to fix the second section on the upper Cover plate. The arrangement of this structure strengthens the fixing fastness of the antenna flexible circuit board and the upper cover plate, prevents the antenna flexible circuit board from warping, and further improves the stability of the speaker box sex. On the other hand, with this structure, there is no need to install a hot spot on the upper cover plate to further fix the antenna flexible circuit board, which reduces a hot spot process, thereby reducing the processing cost.

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 loudspeaker box comprising an upper cover plate, a lower cover plate that is arranged on the upper cover plate and jointly encloses an accommodating space, a sounding unit accommodated in the accommodating space, and a speaker fixed to the upper cover plate The antenna flexible circuit board, the upper cover plate includes a first through hole penetrating therethrough; the antenna flexible circuit board includes a first section attached to the upper cover plate on the side away from the sounding unit The first section is a second section that is bent and extended in the opposite direction, the second section passes through the first through hole and is attached to the side of the upper cover plate close to the sound emitting unit; characterized in that, The lower cover includes a lower cover body that covers the upper cover and collectively encloses the accommodating space, and a pressing wall extending outward from the periphery of the lower cover body. It is pressed on the second section to fix the second section on the upper cover plate.
The speaker box according to claim 1, wherein the upper cover plate comprises an upper cover body portion provided with the first through hole, and an upper cover body portion close to the sound emitting unit by the upper cover body portion One side protrudes and extends a fixed step, and the second section is attached and fixed to the fixed step.
The speaker box according to claim 2, wherein the upper cover plate further comprises a side wall of the upper cover plate bent and extended from the body portion of the upper cover plate toward the lower cover plate, and the lower cover plate The body part is covered on the side wall of the upper cover plate, and the body part of the lower cover plate, the side wall of the upper cover plate and the body part of the upper cover plate jointly enclose the containing space, and the pressing wall is self-contained The main body of the lower cover extends in a direction away from the receiving space.
The speaker box according to claim 2, wherein the first through holes include two and are arranged opposite to each other at intervals, the fixed steps include two, and the two fixed steps are located on the first Between the through holes, and the two first through holes are respectively connected to the two fixed steps; the second section includes two, and the two second sections are formed by opposite ends of the first section Extend and respectively pass through the two first through holes and then are attached to the two fixed steps.
The speaker box according to claim 2, wherein the second section includes an extension wall sandwiched and fixed between the fixed step and the pressing wall, and an extension wall passing through the first through hole and connected to the As for the connecting wall between the first section and the extension wall, the antenna flexible circuit board further includes a pad provided on the extension wall.
The speaker box according to claim 2, wherein the upper cover plate further comprises a receiving groove formed by a side of the upper cover body part away from the sound emitting unit, and the first through hole It is arranged through the receiving groove, and the first section is arranged in the receiving groove.
The speaker box according to claim 1, wherein the upper cover plate further comprises a ring-shaped support wall protruding from the upper cover body portion toward the lower cover plate, and the sound emitting The single support is fixed to the support wall.
The loudspeaker box according to claim 7, wherein the lower cover plate further comprises a second through hole penetrating through the body of the lower cover plate, and the sound-emitting monomer is partially exposed through the second through hole The containment space.
The speaker box according to claim 1, wherein the lower cover plate and the upper cover plate are fixed by ultrasonic welding.
The speaker box according to claim 8, wherein the lower cover plate is made of plastic material.