CN107948884B

CN107948884B - Loudspeaker module

Info

Publication number: CN107948884B
Application number: CN201711175913.7A
Authority: CN
Inventors: 冯国袖; 陈玉海
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2017-11-22
Filing date: 2017-11-22
Publication date: 2021-02-26
Anticipated expiration: 2037-11-22
Also published as: CN107948884A

Abstract

The loudspeaker module comprises a shell and a loudspeaker monomer, wherein the shell comprises a lower shell with a bottom wall and an upper shell with a top wall, an upper shell cover is connected to the lower shell and surrounds an accommodating space with the lower shell, the upper shell comprises a first side wall which is bent and extends from the top wall to the bottom wall, a second side wall which is bent and extends from the bottom wall to the top wall is arranged on the lower shell, at least part of projections of the first side wall and the second side wall on the loudspeaker monomer are overlapped and mutually welded and fixed through ultrasonic waves, an assembly gap is formed between the first side wall and the second side wall, a protruding positioning block is arranged on any one of the first side wall and the second side wall, and the positioning block is located in the assembly gap and abutted to the other one of the first side wall and the second side wall. The loudspeaker module can ensure the positioning precision between the upper shell and the lower shell, avoid the phenomenon that glue or soldering tin liquid permeates into the interior due to overlarge assembly clearance caused by the offset generated between the upper shell and the lower shell, and improve the performance and reliability of products.

Description

Loudspeaker module

Technical Field

The invention relates to the field of electroacoustic conversion, in particular to a loudspeaker module.

Background

With the advent of the mobile internet era, the electronic products are updated more and more rapidly, and people have higher and higher requirements on various aspects of performances of the electronic products, one of which is a high-quality music function.

A speaker module generally includes a housing including upper and lower cases and a lower case, and a speaker unit accommodated in the housing. During assembly, after the loudspeaker single body is installed, the upper shell, the lower shell and the lower shell are sealed through glue or soldering tin liquid, and the assembly is completed. In the prior art, when the upper shell and the lower shell are sealed, the upper shell and the lower shell are easy to deviate in opposite directions to cause overlarge gaps, so that glue or soldering tin liquid permeates into the interior or interferes with a loudspeaker monomer to influence the reliability of a product.

Therefore, there is a need to provide a new speaker module to solve the above problems.

Disclosure of Invention

The invention provides a novel loudspeaker module for solving the technical problems, and solves the problem that in the prior art, glue or soldering tin liquid permeates into the interior of the upper shell and the lower shell due to overlarge gaps, so that the reliability is low, and the specific scheme is as follows:

a speaker module is provided, which comprises a housing having a receiving space and a speaker unit received in the receiving space, the shell comprises a lower shell with a bottom wall and an upper shell with a top wall, the upper shell is covered on the lower shell and forms the containing space with the lower shell, the upper shell comprises a first side wall which is bent and extended from the top wall to the bottom wall, the lower shell is provided with a second side wall which is bent and extended from the bottom wall to the top wall, the projections of the first side wall and the second side wall on the loudspeaker monomer are at least partially overlapped and are mutually fixed by ultrasonic welding, a mounting gap is formed between the first side wall and the second side wall, a protruding positioning block is arranged on any one of the first side wall and the second side wall, the positioning block is positioned in the assembly gap and is abutted against the other one of the first side wall and the second side wall.

Preferably, at least one of the first side wall and the second side wall is provided with a blocking wall extending towards the other side wall, and the blocking wall is used for limiting the displacement of the first side wall and/or the second side wall along the direction perpendicular to the first side wall.

Preferably, the blocking walls include a first blocking wall located on the upper housing and a second blocking wall located on the lower housing, and an assembly gap is formed between an outer surface of the first blocking wall far away from the accommodating space and an inner surface of the second blocking wall close to the accommodating space.

Preferably, the first blocking wall is formed by extending from one end part of the first side wall close to the second side wall; the second blocking wall is formed by extending from one end part of the second side wall close to the first side wall; the first blocking wall is arranged on one side, close to the accommodating space, of the second blocking wall.

Preferably, the top of the first blocking wall abuts against the second side wall.

Preferably, the top wall of the second blocking wall abuts against the first side wall.

Preferably, the top of the first blocking wall and the second side wall are fixed through ultrasonic welding.

Preferably, the positioning block is located on the lower shell.

Preferably, the positioning block is formed by protruding from the outer surface of the second retaining wall far away from the accommodating space to the direction of the first retaining wall.

Preferably, the plurality of positioning blocks are distributed around the outer periphery of the lower housing respectively.

Preferably, the speaker unit includes a magnetic bowl disposed opposite to the bottom wall, a through hole is disposed in a position of the bottom wall corresponding to the magnetic bowl, and at least a portion of the magnetic bowl is exposed outside the housing through the through hole.

The projection of the first side wall of the upper shell and the projection of the second side wall of the lower shell on the loudspeaker single body are at least partially overlapped, an assembly gap is formed between the first side wall and the second side wall, a protruding positioning block is arranged on any one of the first side wall and the second side wall, and the positioning block is positioned in the assembly gap and abutted against the other one of the first side wall and the second side wall. Can guarantee the positioning accuracy between last casing and the lower casing, avoid producing the skew between last casing and the lower casing and produce inside the too big glue or the infiltration of soldering tin liquid that leads to in fit clearance, improve the performance and the reliability of product.

Drawings

FIG. 1 is an exploded view of a speaker module according to the present invention;

FIG. 2 is an enlarged schematic view of a portion P of the speaker module shown in FIG. 1;

FIG. 3 is a schematic view of an assembly structure of the speaker module according to the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is an enlarged view of portion B of FIG. 4;

fig. 6 is a schematic structural diagram of an upper housing of the speaker module according to the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1 to 3, the present invention provides a speaker module 100, which includes a housing having an accommodating space, the housing includes an upper housing 1 and a lower housing 3 enclosing an accommodating space with the upper housing 1, and a speaker unit 2 is accommodated in the accommodating space.

The upper shell 1 comprises a top wall 11 and a first side wall 12 which is bent and extended from the top wall 11 to the lower shell 3; the lower case 3 includes a bottom wall 31 and a second side wall 32 bent and extended from the bottom wall 31 toward the upper case 1. The first side wall 12 and the second side wall 32 are connected end to end and arranged around the accommodating space. And the projections of the first side wall 12 and the second side wall 32 in the direction of the speaker unit 2 at least partially coincide and are fixed by ultrasonic welding. The top wall 11, the bottom wall 31, the first side wall 12 and the second side wall 32 enclose a receiving space therebetween. Preferably, the upper case 1 is further provided with a single body fixing groove 10 recessed from the bottom wall 11 in a direction away from the lower case 3 for fixing the speaker single body 2, and the speaker single body 2 is fixed in the single body accommodating groove 10 and divides the accommodating space into a front cavity and a rear cavity. Specifically, a front cavity is formed between the speaker monomer 2 and the top wall 11 and is used for sounding of the speaker module; a rear cavity is formed between the speaker unit 2 and the bottom wall 31 for improving the low frequency response of the speaker module. Furthermore, a sound outlet channel 13 communicated with the front cavity is further arranged on the first side wall 12 of the upper shell 1, and is used for realizing sound production of the speaker module. The speaker unit 2 includes a magnetic bowl 20 disposed opposite to the bottom wall 31, a through hole 30 is disposed at a position of the bottom wall 31 corresponding to the magnetic bowl 20, and at least a portion of the magnetic bowl 20 is exposed outside the housing through the through hole 30.

As shown in fig. 3 to 5, the first sidewall 12 is provided with a first blocking wall 121 extending toward the lower housing 3; the second side wall 32 is provided with a second blocking wall 321 extending towards the upper housing 1. The outer surface of the first blocking wall 121 far away from the accommodating space is opposite to the inner surface of the second blocking wall 321 near the accommodating space, and an assembly gap d is formed between the first blocking wall 121 and the second blocking wall 321 to avoid the glue overflow problem, preferably, the assembly gap d is between 0.04mm and 0.12mm, and preferably, the assembly gap is 0.05 mm.

The first blocking wall 121 is formed by extending from an end portion of the first sidewall 12 close to the second sidewall 32; the second blocking wall 321 is formed by extending from an end portion of the second sidewall 32 close to the first sidewall 12. Step-shaped structures which can be matched with each other are formed between the top of the first side wall 12 and the first blocking wall 121 and between the top of the second side wall 32 and the second blocking wall 321; the top of the first blocking wall 121 abuts on the second sidewall 32; the top wall of the second stopper wall 32 abuts on the first side wall 12. Further, the top of the first blocking wall 121 and the second side wall 32 are fixed by ultrasonic welding. With the structure, the upper shell 1 and the lower shell 3 are mutually clamped and assembled together, and displacement between the first side wall 12 and/or the second side wall 32 along a direction perpendicular to the first side wall 12 and the second side wall 32 is avoided. The first blocking wall 121 can limit the dislocation of the second side wall 32 of the lower shell 3 caused by the deviation towards the direction of the containing space; the second blocking wall 321 can limit the dislocation of the first sidewall 12 of the upper housing 1 caused by the deviation in the direction away from the receiving space, that is, the problem that the assembly gap between the upper cover and the lower cover is not uniform and is enlarged on one side and reduced on the other side, thereby affecting the reliability of the product is avoided. Of course, this is only a preferred embodiment, and in alternative embodiments, only the first blocking wall 121 or only the second blocking wall 321 may be provided, and the outer surface or the inner surface of the first sidewall 12 or the second sidewall 32 may be welded to the blocking wall, that is, only one side of the upper casing or the lower casing may play a role in limiting.

The speaker module 100 further includes a positioning block 3210 disposed on any one of the first side wall 12 and the second side wall 32. The positioning block 3210 is located in the assembly gap and abuts the other of the first side wall 12 and the second side wall 32, so that the positioning accuracy can be further ensured. Specifically, in the present embodiment, the positioning block 3210 is provided on the second blocking wall 321 of the lower housing 3, and is formed to protrude from the outer surface of the second blocking wall 321 away from the accommodating space toward the first blocking wall 121, and abuts against the first blocking wall 121. Of course, in alternative embodiments, the positioning block 3210 may be disposed on the upper housing 1, and may be implemented as long as it can position the upper housing and the lower housing during installation to ensure an assembly gap. The positioning blocks 3210 are disposed around the outer periphery of the lower case, respectively. Therefore, the widths of the assembly gaps of the upper shell 1 and the lower shell 3 in all directions are uniform, and the positioning accuracy of the upper shell and the lower shell is ensured.

The projection of the first side wall of the upper shell and the projection of the second side wall of the lower shell on the loudspeaker single body are at least partially overlapped, an assembly gap is formed between the first side wall and the second side wall, a protruding positioning block is arranged on any one of the first side wall and the second side wall, and the positioning block is positioned in the assembly gap and abutted against the other one of the first side wall and the second side wall. The positioning accuracy between the upper shell and the lower shell can be ensured, the phenomenon that the welding is not completed and the glue permeates into the interior due to the fact that the assembly gap is too large because of the deviation between the upper shell and the lower shell is avoided, and the performance and the reliability of the product are improved.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are illustrative and not to be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A loudspeaker module comprises a housing with an accommodating space and a loudspeaker single body accommodated in the accommodating space, wherein the housing comprises a lower housing with a bottom wall and an upper housing with a top wall, the upper housing is covered on the lower housing and surrounds the lower housing to form the accommodating space, and the loudspeaker module is characterized in that the upper housing comprises a first side wall which is bent and extends from the top wall to the bottom wall, a second side wall which is bent and extends from the bottom wall to the top wall is arranged on the lower housing, at least partial projections of the first side wall and the second side wall on the loudspeaker single body are overlapped and mutually fixed in an ultrasonic welding mode, an assembly gap is formed between the first side wall and the second side wall, a protruding positioning block is arranged on any one of the first side wall and the second side wall, and the positioning block is located in the assembly gap and abuts against the other one of the first side wall and the second side wall And (6) connecting.

2. The speaker module as claimed in claim 1, wherein at least one of the first and second sidewalls is provided with a blocking wall extending towards the other sidewall, and the blocking wall is used to limit the displacement of the first and/or second sidewall in a direction perpendicular to the first sidewall.

3. The speaker module as claimed in claim 2, wherein the blocking walls comprise a first blocking wall located on the upper housing and a second blocking wall located on the lower housing, and an outer surface of the first blocking wall away from the receiving space is opposite to an inner surface of the second blocking wall close to the receiving space and forms the assembling gap.

4. The speaker module as claimed in claim 3, wherein the first blocking wall is formed extending from an end portion of the first sidewall close to the second sidewall; the second blocking wall is formed by extending from one end part of the second side wall close to the first side wall; the first blocking wall is arranged on one side, close to the accommodating space, of the second blocking wall.

5. The speaker module as claimed in claim 4, wherein the top of the first blocking wall abuts against the second sidewall.

6. The speaker module as claimed in claim 5, wherein the top wall of the second baffle wall abuts against the first sidewall.

7. The speaker module as claimed in claim 6, wherein the top of the first blocking wall and the second side wall are fixed by ultrasonic welding.

8. The speaker module as claimed in claim 3, wherein the positioning block is formed by protruding from an outer surface of the second wall away from the receiving space toward the first wall.

9. The speaker module as claimed in claim 8, wherein the positioning blocks are disposed around the receiving space and distributed around the outer periphery of the lower housing.

10. The speaker module as claimed in any one of claims 1-9, wherein the speaker unit includes a magnetic bowl disposed opposite to the bottom wall, the bottom wall has a through hole corresponding to the magnetic bowl, and the magnetic bowl is at least partially exposed out of the housing through the through hole.