WO2020073365A1

WO2020073365A1 - Loudspeaker module

Info

Publication number: WO2020073365A1
Application number: PCT/CN2018/112258
Authority: WO
Inventors: 张翠丽; 李晓龙; 杨圣虎; 李昌龙; 王建新
Original assignee: 歌尔股份有限公司
Priority date: 2018-10-12
Filing date: 2018-10-27
Publication date: 2020-04-16
Also published as: CN109151686A; CN109151686B

Abstract

Disclosed is a loudspeaker module, comprising a module housing where an accommodation space is formed, and a loudspeaker unit provided in the accommodation space. The loudspeaker unit divides the accommodation space into a front acoustic cavity and a rear acoustic cavity. The module housing is provided with a sound outlet hole communicated with the front acoustic cavity. The loudspeaker module further comprises an annular separating sound hole which is provided around the sound outlet hole, and is fixedly combined with the module housing. A seal ring is fixedly combined at one side of the separating sound hole distant from the module housing. According to the present invention, the module housing and the separating sound hole are independently produced and processed in two parts, and are made of different materials, thereby reducing the overall cost.

Description

Speaker module

Technical field

The invention relates to the technical field of electroacoustics. More specifically, it relates to a speaker module.

Background technique

The speaker module usually has a sound hole in the module shell, and the sound emitted by the diaphragm is transmitted to the outside through the sound hole. In order to ensure the sealability of the speaker module and the whole machine after assembly, generally a sealing ring is pasted around the sound hole, and the material of the sealing ring is mostly silicon rubber. However, in the process of pasting the sealing ring, it is not easy to locate the sealing ring, and the sealing ring is easy to deflect, which will block a part of the sound hole, resulting in poor consistency of the whole machine, affecting the acoustic effect of the whole machine and poor sealing. Therefore, at present, there is a speaker module that over-molds silicone rubber into the sound hole of the module shell to form a seal ring, but this method requires the plastic material of the module shell to be resistant to high temperatures. Generally, PEI materials will be selected. PEI materials are much higher than ordinary module housing materials, such as D151 and D251, which will increase the cost of the module housing. In addition, the speaker module shells are injection molded parts with complex structure. The second injection mold with double injection will also become complicated in structure, on the one hand, it will increase the overall production cost of the speaker module, on the other hand, the module after the second injection The overall size of the housing is not easy to guarantee.

Summary of the invention

The purpose of the present invention is to provide a speaker module with lower production cost and higher dimensional accuracy of the module housing.

According to an aspect of the present invention, there is provided a speaker module, including: a module case forming an accommodation space, and a speaker unit provided in the accommodation space, the speaker unit separating the accommodation space For the front sound cavity and the rear sound cavity, the module housing is provided with a sound hole communicating with the front sound cavity. The speaker module further includes a ring-shaped separation sound hole, the separation sound hole is disposed around the sound hole, and It is fixedly combined with the module shell, and a sealing ring is fixedly combined on the side of the separation sound hole away from the module shell.

Preferably, the module housing surrounding the sound hole is recessed inward to form an annular fixing groove, and one side of the separating sound hole is fixedly combined in the fixing groove.

Preferably, the separation sound hole is connected to the fixing groove by gluing.

Preferably, the width of the fixing groove is greater than the thickness of the side wall of the separation sound hole.

Preferably, the surface of the side wall of the fixing groove protrudes outward to form a positioning boss.

Preferably, the positioning boss is formed by the outward projection of the side wall surface of the fixing groove near the sound outlet hole.

Preferably, there are four positioning bosses, which are evenly distributed on the side wall surface of the fixing groove; or two positioning bosses, which are symmetrically distributed on the side wall surface of the fixing groove.

Preferably, the top surface of the side wall of the fixing groove close to the sound hole protrudes outward to form a vertical boss, and the separation sound hole is provided with a step corresponding to the vertical boss, and the step overlaps On the vertical boss, the gap between the separation sound hole and the side wall and bottom surface of the fixing groove forms a glue-receiving groove.

Preferably, the vertical boss is continuously arranged around the top surface of the side wall of the fixing groove close to the sound outlet.

Preferably, the material of the module housing is D151 or D251 plastic, the material of the separation sound hole is PEI, the material of the sealing ring is silicone rubber, and the separation sound hole and the sealing ring are integrated by double injection form.

The beneficial effects of the present invention are as follows:

According to the invention, the separation sound hole is fixedly connected to the sealing ring and the separation sound hole, so that the module shell and the separation sound hole are separately produced and processed in two parts. The two parts can use different materials, thereby reducing the overall cost. In addition, since there is no need to over-mold the module housing with a complicated structure, the complexity of the module housing mold is reduced, and the dimensional accuracy of the module housing is improved. At the same time, the secondary injection molding process is used for the separation of the sound hole and the sealing ring with a simple structure, which also reduces the complexity of the second shot mold and reduces the overall cost.

BRIEF DESCRIPTION

The specific embodiments of the present invention will be further described in detail below with reference to the drawings.

FIG. 1 shows a schematic diagram of an exploded structure of the present invention.

Figure 2 shows a schematic diagram of the present invention.

Fig. 3 shows a cross-sectional view of the A-A plane of the present invention.

FIG. 4 shows a partially enlarged view of the present invention.

detailed description

In order to explain the present invention more clearly, the present invention will be further described below with reference to preferred embodiments and drawings. Similar parts in the drawings are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not be used to limit the protection scope of the present invention.

The invention provides a speaker module. The module includes a module housing and a speaker unit. A housing space is formed in the module housing. The speaker unit is accommodated in the housing space and divides the housing space into Front and rear acoustic cavity. The speaker unit is a moving coil unit or a moving iron unit. For ease of explanation, in this embodiment, a moving coil type monomer is used as an example. As shown in FIG. 1, the moving coil type unit includes a vibration component and a magnetic circuit component. The vibration assembly includes a diaphragm 1 and a voice coil 2, and the diaphragm 1 is connected to the voice coil 2. The magnetic circuit system includes a yoke 3 and a center magnet 4 and a side magnet 5 provided on one side surface of the yoke 3, a magnetic gap is formed between the center magnet 4 and the side magnet 5, and one end of the voice coil 2 is inserted into the magnetic In the gap. When the voice coil 2 is energized, the voice coil 2 will vibrate under the action of the magnetic circuit system. At the same time, the voice coil 2 drives the diaphragm 1 to vibrate together to realize the sound of the diaphragm 1. The module shell includes an upper shell 6 and a middle shell 7 that cooperate with each other. The middle shell 7 is provided with a sound hole 8 that communicates with the front sound cavity. The sound emitted by the diaphragm 1 is transmitted to the outside through the sound hole 8. This is common knowledge of those skilled in the art and will not be described in detail here.

As shown in FIGS. 1-3, the speaker module of the present invention further includes a separation sound hole 9, which is arranged in a ring shape, and is fixedly connected around the middle shell 7 around the sound hole 8, and the separation sound hole 9 is far away from the center A sealing ring 10 is fixedly connected to one side of the housing 7, and the sealing ring 10 can improve the sealing performance of the speaker module and the whole machine after assembly. In this embodiment, the shell 7 can be injection molded using a relatively inexpensive D151 or D251 plastic material, the separation sound hole 9 can be injection molded using a relatively expensive PEI resin material, the material of the sealing ring 10 is silicone rubber, and the second injection is used The method is integrated with the separation sound hole 9. In the speaker module of this structure, since the middle shell 7 and the separation sound hole 9 are separately produced and processed, the two parts can use different materials, thereby reducing the overall cost. In addition, since there is no need to over-inject the middle shell with a complicated structure, the complexity of the middle shell 7 mold is reduced, and the dimensional accuracy of the middle shell is improved. At the same time, the simple structure of the separation sound hole 9 and the sealing ring 10 is processed by double injection molding, which also reduces the complexity of the second shot mold and reduces the overall cost.

Further as shown in FIG. 1, FIG. 3 and FIG. 4 together, the middle shell 7 surrounding the sound hole 8 is recessed inward to form an annular fixing groove 11, and the side separating the sound hole 9 is fixedly connected in the fixing groove 11. Specifically, the separation sound hole 9 is fixedly connected in the fixing groove 11 by means of glue, thereby improving the positioning accuracy of the separation sound hole 9 and the middle shell 7, and also improving the positioning accuracy of the seal ring 10 and the sound hole 8 , To avoid blocking the sound hole 8 and affect the acoustic effect of the whole machine.

In order to improve the positioning accuracy of the separation sound hole 9 and at the same time reduce the difficulty of assembling the separation sound hole 9 and the middle shell 7, the width of the fixing groove 11 is further set to be greater than the thickness of the side wall of the separation sound hole 9 to facilitate separation One side of the sound hole 9 is put into the fixing groove 11. At the same time, the side wall surface of the fixing groove 11 protrudes outward to form a plurality of positioning bosses 12, which can improve the accuracy of separating the sound holes 9. Preferably, four positioning bosses 12 are provided on the side walls of the fixing groove 11 close to the sound hole 8 respectively; or two positioning bosses are provided, which are symmetrically distributed on the side wall surface of the fixing groove.

Since the separation sound hole 9 is fixed in the fixing groove 11 by glue, in order to prevent the overflow of glue from affecting the appearance of the product. As shown in FIG. 4, the top surface of the side wall of the fixing groove 11 close to the sound hole 8 protrudes outward to form a vertical boss 13. Specifically, the vertical boss 13 is continuously arranged around the top surface of the side wall of the fixing groove 11 near the sound hole, and the separation sound hole 9 is provided with a step 14 corresponding to the vertical boss 13, through which the step 14 is overlapped in the vertical direction The boss 13 has a gap between the bottom surface of the side wall separating the sound hole 9 and the bottom surface of the fixing groove 11. Since the width of the fixing groove 11 is greater than the thickness of the side wall of the separation sound hole 9, there is also a gap between the two sides and the bottom surface of the side wall of the separation sound hole 9 and the fixing groove 11, and the gap communicates together to form a glue containing groove 15 15 is used to contain excess glue to prevent glue overflow.

Obviously, the above examples of the present invention are only examples for clearly illustrating the present invention, rather than limiting the embodiments of the present invention. For those of ordinary skill in the art, based on the above description, they can also do There are other different forms of changes or changes that cannot be exhaustively listed here. Any obvious changes or changes derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

A speaker module includes a module housing forming an accommodation space, and a speaker monomer provided in the accommodation space. The speaker monomer divides the accommodation space into a front acoustic cavity and a rear acoustic cavity. The group casing is provided with a sound hole communicating with the front sound cavity, and is characterized in that the speaker module further includes a ring-shaped separation sound hole, the separation sound hole is arranged around the sound hole, and is connected with the module shell The body is fixedly combined, and the separation sound hole is fixedly combined with a sealing ring on the side away from the module housing.
The speaker module according to claim 1, wherein the module housing surrounding the sound hole is recessed inward to form an annular fixing groove, and one side of the separation sound hole is fixedly combined with the fixing groove Inside.
The speaker module according to claim 2, wherein the separation sound hole is connected to the fixing groove by glue.
The speaker module according to claim 2, wherein the width of the fixing groove is greater than the thickness of the side wall of the separation sound hole.
The speaker module according to claim 4, wherein the surface of the side wall of the fixing groove protrudes outward to form a positioning boss.
The speaker module according to claim 5, wherein the positioning boss is formed by projecting outwards from a side wall surface of the fixing groove near the sound outlet.
The speaker module according to claim 6, characterized in that there are four positioning bosses, which are evenly distributed on the side wall surface of the fixing groove; or two positioning bosses, which are symmetrically distributed on all Describe the side wall surface of the fixing groove.
The speaker module according to claim 4, wherein the top surface of the side wall of the fixing groove close to the sound hole protrudes outward to form a vertical boss, and the separate sound hole is provided with the vertical protrusion A step corresponding to the platform, the step overlaps the vertical convex platform, and the gap between the separation sound hole and the side wall and the bottom surface of the fixing groove forms a glue-receiving groove.
The speaker module according to claim 8, wherein the vertical boss is continuously arranged around the top surface of the side wall of the fixing groove close to the sound outlet.
The speaker module according to claim 1, wherein the material of the module housing is D151 or D251 plastic, the material of the separation sound hole is PEI, and the material of the sealing ring is silicone rubber. The separation sound hole and the sealing ring are integrally formed by double injection molding.