CN108924718B

CN108924718B - Loudspeaker module

Info

Publication number: CN108924718B
Application number: CN201811190991.9A
Authority: CN
Inventors: 李晓龙; 杨圣虎; 张翠丽; 李昌龙; 王建新
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2018-10-12
Filing date: 2018-10-12
Publication date: 2020-06-02
Anticipated expiration: 2038-10-12
Also published as: CN108924718A; WO2020073535A1

Abstract

The invention discloses a loudspeaker module, comprising: the loudspeaker module comprises a module shell and a loudspeaker monomer, wherein the module shell forms an accommodating space, the loudspeaker monomer is arranged in the accommodating space and is divided into a front sound cavity and a rear sound cavity, the module shell is provided with a sound outlet communicated with the front sound cavity, the loudspeaker module further comprises an annular separating sound hole, the separating sound hole is provided with a first connecting sheet, one end of the first connecting sheet is connected with the separating sound hole, the other end of the first connecting sheet is located outside the separating sound hole, the module shell is provided with a second connecting sheet which is connected with the first connecting sheet in a welded mode, the separating sound hole surrounds the sound outlet, the sound outlet is fixedly combined with the module shell, and a sealing ring is fixedly combined on one side, away from the module shell, of the separating sound hole. According to the invention, the first connecting sheet and the second connecting sheet are fixedly connected, so that the connection strength between the separation sound hole and the module shell is improved, and the reliability of the product is improved.

Description

Loudspeaker module

Technical Field

The invention relates to the technical field of electroacoustic. And more particularly, to a speaker module.

Background

The speaker module usually has a sound hole formed in the module housing, so that sound emitted from the diaphragm can be transmitted to the outside through the sound hole. In order to ensure the sealing performance of the loudspeaker module after being assembled with the whole loudspeaker, sealing rings are generally adhered to the periphery of the sound outlet hole, and the sealing rings are mostly made of silicon rubber. However, in the process of adhering the sealing ring, the sealing ring is not easy to position, the sealing ring is easy to adhere to the side, and a part of sound outlet holes can be shielded, so that the consistency of the whole machine is poor, the acoustic effect of the whole machine is influenced, and the sealing is poor.

At present, a loudspeaker module is formed by injecting silicon rubber to a sound outlet hole of a module shell in a secondary forming mode to form a sealing ring, but the method needs to ensure that a plastic material of the module shell is high-temperature resistant, a PEI (polyetherimide) material is generally selected, and the PEI material is much higher than the materials of a common module shell, such as D151, D251 and the like, so that the cost of the module shell can be increased. And the speaker module shell is the injection molding that the structure is complicated, and the two-shot mould that adopts the secondary to mould plastics also will become the structure complicacy, can wholly improve the cost of manufacture of speaker module on the one hand, and the whole size of the module shell after on the other hand two-shot is difficult for guaranteeing yet. Therefore, the inventor provides a technical scheme, an annular separating sound hole is added in the loudspeaker module, the sealing ring is integrally formed with the separating sound hole in a secondary injection molding mode, and the separating sound hole is arranged around the sound hole and is fixedly bonded with the module shell through glue.

However, the inventor finds that the loudspeaker module is fixedly connected with the separated sound hole and the module shell in an adhesive mode, the bonding strength is low, and the risk that the separated sound hole is separated from the module shell is caused in the product falling process, so that the reliability of the product is influenced.

Disclosure of Invention

The invention aims to provide a loudspeaker module with high reliability, wherein a separation sound hole is difficult to fall off from a module shell.

According to an aspect of the present invention, there is provided a speaker module including: the loudspeaker module comprises a module shell and a loudspeaker monomer, wherein the module shell forms an accommodating space, the loudspeaker monomer is arranged in the accommodating space and is divided into a front sound cavity and a rear sound cavity, the module shell is provided with a sound outlet communicated with the front sound cavity, the loudspeaker module further comprises an annular separating sound hole, the separating sound hole is provided with a first connecting sheet, one end of the first connecting sheet is connected with the separating sound hole, the other end of the first connecting sheet is located outside the separating sound hole, the module shell is provided with a second connecting sheet which is connected with the first connecting sheet in a welded mode, the separating sound hole surrounds the sound outlet, the sound outlet is fixedly combined with the module shell, and a sealing ring is fixedly combined on one side, away from the module shell, of the separating sound hole.

Preferably, the upper surface of one end of the second connecting piece is positioned at the outer side of the module shell, and the first connecting piece and the second connecting piece are welded in an overlapping mode.

Preferably, the first connecting piece and the separating sound hole are integrally formed in an injection molding mode, and the second connecting piece and the module shell are integrally formed in an injection molding mode.

Preferably, the first connecting piece is provided with one or more glue grabbing holes capable of improving the connecting strength of the first connecting piece and the separating sound hole.

Preferably, the first connecting sheet and the second connecting sheet are both metal connecting sheets.

Preferably, the module case surrounding the sound outlet is recessed inward to form an annular fixing groove, and one end of the separation 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 sidewall of the separation sound hole.

Preferably, the separation sound hole is provided with a step corresponding to the top surface of the side wall of the fixing groove, the step is lapped on the top surface of the side wall of the fixing groove, and a glue accommodating groove is formed by gaps between the two sides and the bottom surface of the side wall of the separation sound hole and the fixing groove.

Preferably, the module shell is made of D151 or D251 plastic, the separating sound hole is made of PEI, the sealing ring is made of silicon rubber, and the separating sound hole and the sealing ring are integrally formed by secondary injection molding.

The invention has the following beneficial effects:

according to the invention, the separating sound hole is arranged, and the sealing ring is fixedly connected with the separating sound hole, so that the module shell and the separating sound hole are separately and independently produced and processed, and the two parts can be made of different materials, thereby reducing the overall cost. Through the fixed connection to first connection piece and second connection piece, improved the joint strength between separation sound hole and the module casing to improve the reliability of product.

Drawings

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Fig. 1 shows an exploded view of the present invention.

Fig. 2 shows a schematic of the structure of the present invention.

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

Fig. 4 shows a partial enlarged view of the present invention.

Detailed Description

In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.

The invention provides a loudspeaker module, which comprises a module shell and a loudspeaker single body, wherein an accommodating space is formed in the module shell, and the loudspeaker single body is accommodated in the accommodating space and divides the accommodating space into a front sound cavity and a rear sound cavity. The loudspeaker monomer is a moving-coil monomer or a moving-iron monomer. For convenience of explanation, the moving-coil type single body is taken as an example in this embodiment. As shown in fig. 1, the moving coil unit includes a vibration assembly and a magnetic circuit assembly. The vibration component comprises a vibrating diaphragm 1 and a voice coil 2, and the vibrating diaphragm 1 is connected with the voice coil 2. The magnetic circuit system includes a yoke 3, and a center magnet 4 and a side magnet 5 disposed on one side surface of the yoke 3, a magnetic gap being formed between the center magnet 4 and the side magnet 5, and one end of the voice coil 2 being inserted into the magnetic gap. After voice coil 2 circular telegram, voice coil 2 can vibrate under magnetic circuit's effect, and meanwhile, voice coil 2 drive vibrating diaphragm 1 together vibrate, realize vibrating diaphragm 1's sound production. The module casing has seted up out phonate hole 8 including epitheca 6 and mesochite 7 mutually supporting, mesochite 7, phonate hole 8 and preceding sound chamber intercommunication, and the sound that vibrating diaphragm 1 sent propagates to the external world through phonate hole 8. This is common knowledge of a person skilled in the art and will not be described in detail here.

As shown in fig. 1-3, the speaker module of the present invention further includes a separating sound hole 9, the separating sound hole 9 is configured in a ring shape, and is fixed on the middle shell 7 around the sound outlet hole 8 by being surrounded by glue, one side of the separating sound hole 9 away from the middle shell 7 is fixedly connected with a sealing ring 16, and the sealing ring 16 can improve the sealing performance of the speaker module after being assembled with the whole speaker module. In this embodiment, the casing 7 may be injection molded by using a D151 or D251 plastic material with a low price, the separating sound hole 9 may be injection molded by using a PEI resin material with a high price, and the sealing ring 10 is made of silicone rubber and is integrally formed with the separating sound hole 9 by using a secondary injection molding method. The loudspeaker module with the structure has the advantages that the middle shell 7 and the separated sound hole 9 are separately and independently produced and processed, and the two parts can be made of different materials, so that the overall cost is reduced. In addition, because the secondary injection molding is not needed to be carried out on the middle shell with a complex structure, the complexity of the middle shell 7 mold is reduced, and the dimensional accuracy of the middle shell is also improved. Meanwhile, the separating sound hole 9 and the sealing ring 16 which have simpler structures are processed by adopting a secondary injection molding process, so that the complexity of a secondary injection mold is reduced, and the overall cost is reduced.

In order to improve the connection strength between the separation sound hole 9 and the middle case 7, as shown in fig. 2 to 4, the separation sound hole 9 of the present invention is provided with a first connection piece 10, the middle case 7 is provided with a second connection piece 11, and one end of the first connection piece 10 and one end of the second connection piece 11 are lap-welded, thereby improving the connection strength between the separation sound hole 9 and the middle case 7. Specifically, first connecting piece 10 and second connecting piece 11 are the metal material, and the one end and the separation phonic hole 9 fixed connection of first connecting piece 10, the other end is located the outside of separation phonic hole 9, and first connecting piece 10 can be through the mode of moulding plastics and separation phonic hole 9 integrated into one piece. Furthermore, the first connecting sheet 10 is provided with one or more glue catching holes 12, and due to the small volume of the separating sound hole 7, the overlapping part of the first connecting sheet 10 and the separating sound hole 9 in injection molding is also small, and the connecting strength is low. The first connecting piece 10 is provided with the glue grabbing hole 12, so that the connecting strength of the first connecting piece 10 and the separating sound hole 9 can be increased, and the reliability of the product is improved. Second connection piece 11 and mesochite 7 are through the mode integrated into one piece that moulds plastics, and mesochite 7 is provided with the disappearance, makes the one end surface of second connection piece 11 expose in the outside of mesochite 7, and first connection piece 10 laps on the surface of second connection piece 11 to can carry out laser welding to the two and connect.

As further shown in fig. 1, 3 and 4 together, the middle shell 7 surrounding the sound outlet 8 is recessed inwardly to form a fixing groove 13 having a ring shape, and one side of the sound outlet 9 is fixedly connected to the fixing groove 13. Specifically, separation sound hole 9 passes through sticky mode fixed connection in fixed slot 13 to improved the positioning accuracy of separation sound hole 9 and mesochite 7, also improved the positioning accuracy of sealing washer 10 with sound outlet 8 simultaneously, avoided sheltering from to sound outlet 8, influenced the acoustic effect of complete machine.

In order to reduce the difficulty of assembling the separation sound hole 9 and the middle case 7, the present embodiment further sets the width of the fixing groove 13 to be greater than the thickness of the sidewall of the separation sound hole 9, facilitating the placement of one side of the separation sound hole 9 into the fixing groove 13. Since the separating sound hole 9 is fixed in the fixing groove 13 by means of gluing, the appearance of the product is prevented from being affected by glue overflow. As shown in fig. 4, the separating sound hole 9 is provided with a step 14 corresponding to the top surface of the side wall of the holding groove 13, and the step 14 overlaps the top surface of the side wall of the holding groove 13 so that a gap is provided between the bottom surface of the side wall of the separating sound hole 9 and the bottom surface of the holding groove 13. Because the width of the fixing groove 13 is greater than the thickness of the side wall of the separation sound hole 9, gaps are also formed between the two sides and the bottom surface of the side wall of the separation sound hole 9 and the fixing groove 13, the gaps are communicated to form a glue containing groove 15, and the glue containing groove 15 is used for containing redundant glue to prevent glue overflow.

It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.

Claims

1. The utility model provides a loudspeaker module, is in including the module casing that forms accommodation space, and the setting loudspeaker monomer in the accommodation space, loudspeaker monomer will accommodation space separates for preceding vocal chamber and back vocal chamber, the module casing sets up the phonate hole with preceding vocal chamber intercommunication, a serial communication port, this loudspeaker module still includes annular separation phonate hole, the separation phonate hole is equipped with one end and is connected, the other end is located the first connection piece in the separation phonate hole outside, the module casing be equipped with first connection piece welded connection's second connection piece, the separation phonate hole encircles the phonate hole sets up, and with module casing fixed combination, one side that module casing was kept away from to the separation phonate hole has the sealing washer through the technology integrated into one piece of moulding plastics, module casing and separation phonate hole are made by different materials.

2. The speaker module as claimed in claim 1, wherein an upper surface of one end of the second connecting piece is located outside the module case, and the first connecting piece and the second connecting piece are lap-welded.

3. The speaker module as recited in claim 1, wherein the first connecting tab is integrally formed with the discrete acoustic aperture by injection molding and the second connecting tab is integrally formed with the module housing by injection molding.

4. The speaker module as claimed in claim 3, wherein the first connecting plate defines one or more glue-catching holes for improving the connection strength between the first connecting plate and the separating sound hole.

5. The speaker module as recited in claim 1, wherein the first and second connector tabs are both metal connector tabs.

6. The speaker module as claimed in claim 1, wherein the module housing surrounding the sound outlet is recessed inwardly to form a ring-shaped fixing groove, and one end of the separate sound outlet is fixedly coupled to the fixing groove.

7. The speaker module as claimed in claim 6, wherein the separation sound hole is connected to the fixing groove by gluing.

8. The speaker module as claimed in claim 6, wherein the width of the fixing groove is greater than the thickness of the sidewall of the separation sound hole.

9. The speaker module as claimed in claim 8, wherein the separating acoustic hole is provided with a step corresponding to the top surface of the sidewall of the fixing groove, the step is overlapped on the top surface of the sidewall of the fixing groove, and the gap between the bottom surface and both sides of the sidewall of the separating acoustic hole and the fixing groove forms a glue receiving groove.

10. The speaker module as claimed in claim 1, wherein the module housing is made of D151 or D251 plastic, the separating acoustic hole is made of PEI, the sealing ring is made of silicone rubber, and the separating acoustic hole and the sealing ring are integrally formed by two-shot molding.