WO2019024470A1

WO2019024470A1 - Sounder module

Info

Publication number: WO2019024470A1
Application number: PCT/CN2018/074234
Authority: WO
Inventors: 马宏达; 刘广福; 王景伟; 陈国强
Original assignee: 歌尔股份有限公司
Priority date: 2017-07-31
Filing date: 2018-01-26
Publication date: 2019-02-07
Also published as: CN107277720A; CN107277720B

Abstract

Disclosed is a sounder module, comprising a module casing and a sounder monomer accommodated in a cavity formed by the module casing. The sounder monomer divides the cavity into a front cavity and a back cavity; the module casing is provided with a sound outlet; the front cavity comprises an upstream cavity and an outlet channel used for communicating the upstream cavity and the sound outlet; the module upper casing comprises a main body part and a first retaining wall; the upstream cavity is formed by the first retaining wall in a surrounding manner; a section of the first retaining wall which is adjacent to the outlet channel is a cantilever section; an inlet of the outlet channel is formed between the cantilever section and the main body part; a second retaining wall forming the side wall of the outlet channel is also provided on the main body part; the module lower casing, the second retaining wall and the cantilever section form the outlet channel together, and seal the outlet channel. The present invention increases the height of the outlet channel and improves the sounding smoothness of the sounder module, so as to improve the sound quality and the sensitivity of the sounder module.

Description

Sounder module

Technical field

The invention relates to the field of acoustic and electrical conversion technology. More specifically, it relates to a sounder module.

Background technique

With the rapid development of science and technology, consumers are increasingly demanding electronic products. Based on consumer demand for electronic products, the design of electronic products such as mobile phones tends to be lighter and thinner. As an important acoustic component of portable electronic devices, the sounder module is used to complete the conversion between electrical signals and acoustic signals, and is an energy conversion device.

The sound generator module includes a module outer casing and a sound generator unit received in the module outer casing, and the sound generator unit separates the cavity enclosed by the module outer casing into a front cavity and a rear cavity. The module housing includes a corresponding module upper shell and a lower module shell, and the upper shell of the module forms a side wall supporting the sounder unit. The front cavity comprises a module sound outlet provided on the module casing, an upstream cavity supported by the side wall supporting the sounder unit, and an sound passage connecting the upstream cavity and the module sound outlet. The sound generated by the sounding unit's single vibration system propagates through the upstream cavity of the front cavity, the sounding channel and the module sounding port to the outside of the sounder module.

The front cavity of the conventional sounder module is provided by the upper casing of the module, and the sounder module is also getting thinner due to the light and thin setting requirements of the electronic product. Under the limitation of the thickness of the sounder module, the occupied space of the upper shell of the module becomes smaller, and the sound channel of the front cavity provided by the upper shell of the module becomes narrow, and the sound of the sounder module is not smooth, which seriously affects the sound generation. The acoustic performance of the module reduces the sound quality and sensitivity of the sounder module.

Therefore, it is desirable to provide a sounder module that can improve sound smoothness and improve the sound quality and sensitivity of the sounder module.

Summary of the invention

An object of the present invention is to provide a sounder module that increases the height of the sound channel of the sounder module, improves the sound smoothness of the sounder module, and improves the sound quality and sensitivity of the sounder module.

In order to solve the above technical problems, the present invention adopts the following technical solutions:

The present invention discloses a sounder module comprising a module housing and a sound generator unit housed in a cavity formed by the module housing, the sounder unit dividing the cavity into a front cavity and a rear cavity, the module housing is provided with an sound outlet, the front cavity includes an upstream cavity facing the sounder unit and an sound passage for connecting the upstream cavity and the sound outlet, The module housing includes a module upper shell and a module lower shell that are ultrasonically welded together.

The module upper case includes a body portion and an annular first retaining wall disposed on the body portion for supporting and fixing the sounder unit, and the sound generator unit and the first retaining wall are coated a first sealing wall surrounds the upstream cavity, and a section of the first retaining wall adjacent to the sounding channel is a cantilever beam segment, and an entrance of the sound channel is formed between the cantilever beam segment and the body portion ;

a second retaining wall connected to the cantilever beam segment and surrounding the sidewall of the sound channel is formed on the body portion, and the second retaining wall is ultrasonically welded to the lower shell of the module;

a portion of the lower shell of the module corresponding to the cantilever segment is provided with a hollow portion, a glue seal is sealed between the hollow portion and the cantilever portion, and the ultrasonic welding region corresponding to the second retaining wall is sealed The connection achieves a sealed sound path.

Preferably, the cantilever section comprises an engagement portion on the side of the sounder unit, the engagement portion being glued to the side wall of the sounder unit.

Preferably, the cantilever beam segment further includes a support portion connected to the engaging portion for supporting the sounder unit.

Preferably, the hollow portion is openly disposed toward one side of the sounder unit and abuts with the sound generator unit, both ends of the hollow portion, a side of the hollow portion remote from the sound generator unit, and Glue seal between the cantilever sections.

Preferably, the hollow portion is a through hole having an annular side wall, and both ends of the hollow portion, a side of the hollow portion remote from the sound generator unit and a cantilever beam portion are glue-sealed.

Preferably, the through hole is of an elongated shape, and the entire area of the through hole is coated with glue.

Preferably, at least one support rib is disposed between the cantilever beam segment and the body portion.

Preferably, a third retaining wall corresponding to the second retaining wall is formed on the lower casing of the module, and the third retaining wall is ultrasonically welded to a corresponding surface of the second retaining wall.

Preferably, the sound outlet is formed on a lower case of the module corresponding to the end of the sound exit channel.

Preferably, the module upper case is ultrasonically welded to the periphery of the lower case of the module to form a module outer casing.

The module upper casing of the sounder module of the present invention comprises a body portion and an annular first retaining wall disposed on the body portion for supporting and fixing the sounder unit. The front cavity of the sounder module includes an upstream cavity surrounded by the first retaining wall and an sounding channel connecting the sounding port and the upstream cavity on the module housing. The position of the first retaining wall near the sound exiting channel is a cantilever beam segment, and the cantilever beam segment forms an entrance with an acoustic channel with the body portion. Further forming a second retaining wall connected to the cantilever segment and surrounding the inlet for forming a sidewall of the sound passage, the top surface of the second retaining wall is ultrasonically welded to the lower shell of the module, Form an acoustic channel. The sounder module of the invention forms an acoustic channel through the lower shell of the module and the upper shell of the module, which increases the height of the sound channel of the front cavity, and solves the problem that the traditional sounder module is simply enclosed by the upper shell of the module. The cavity causes a problem of narrowing of the sound path, thereby improving the smoothness of the sound.

Ultrasonic welding between the second retaining wall and the lower casing of the module, in order to achieve sealing of the sounding passage, a hollow portion is disposed at a portion corresponding to the lower beam of the module and the cantilever beam, the hollow portion and the hollow portion The cantilever sections are glued and sealed, and the glued sealing area is connected with the ultrasonic welding area to achieve the sealing of the sound path. In addition, the sealing of the hollow portion and the cantilever beam in the form of glue coating can avoid the collapse of the cantilever beam by the sealing method such as ultrasonic welding, and the sealing of the sound channel is simple and easy. The cantilever beam segment and the body portion form an elongated sounding channel inlet, and at least one supporting rib may be disposed between the cantilever beam segment and the body portion to increase the stability of the cantilever beam segment.

DRAWINGS

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

1 is an exploded perspective view showing a first embodiment of a sound generator module according to the present invention;

2 is a cross-sectional view showing a first embodiment of a sound generator module according to the present invention;

Figure 3 is an enlarged schematic view showing a region A in Figure 2;

4 is an exploded perspective view showing a second embodiment of a sound generator module according to the present invention;

Figure 5 is a cross-sectional view showing a second embodiment of a sound generator module according to the present invention;

Figure 6 is an enlarged schematic view showing a region B in Figure 5;

Reference mark:

11, module upper shell, 12, module lower shell, 13, sounder unit, 14, upstream cavity, 15, sound channel, 16, welding line area, 111, first retaining wall, 112, cantilever beam Section, 113, sound channel entrance, 114, second retaining wall, 121, sound outlet, 122, hollow;

21, module upper shell, 22, module lower shell, 23, sounder unit, 26, welding line area, 212, cantilever section, 222, hollow.

Detailed ways

In order to explain the present invention more clearly, the present invention will be further described in conjunction with the preferred embodiments and the accompanying drawings. Similar components in the drawings are denoted by the same reference numerals. It should be understood by those skilled in the art that the following detailed description is intended to be illustrative and not restrictive.

Embodiment 1

1 is an exploded perspective view of a first embodiment of a sound generator module according to the present invention, FIG. 2 is a cross-sectional view showing a first embodiment of the sound generator module according to the present invention, and FIG. 3 is an enlarged schematic view showing a region A of FIG. In this embodiment, the sounder module includes a module housing and a sounder unit 13 received in the module housing, and the sounder unit 13 divides the cavity into a front cavity and a rear cavity.

The module housing includes a module upper case 11 and a module lower case 12 which are ultrasonically welded together, and the sound generator unit 13 is fixed on the module upper case 11. The module upper case 11 includes a body portion and an annular first retaining wall 111 disposed on the body portion for supporting and fixing the sounder unit 13 .

The front cavity includes an upstream cavity 14 facing the sounder unit 13 and an sound outlet 121 connecting the module housing and the sounding passage 15 of the upstream cavity 14. The upstream cavity 14 is enclosed by the first retaining wall 111 together with the sounder unit 13 and the body portion. The position of the first retaining wall 111 near the sounding passage 15 is a cantilever beam segment 112, and an entrance of the sound channel 15 is formed between the cantilever beam segment 112 and the body portion. The module upper casing 11 further includes a second retaining wall 114 formed on the body portion and connected to the cantilever segment 112 and surrounding the cantilever segment 112, the module lower casing 12 and the second retaining wall 114 ultrasonic welding forms a weld trace area 16. In this embodiment, the second retaining wall 114 is opposite sidewalls respectively connected to the two ends of the cantilever segment 112 and perpendicular to the body portion, and the shape of the module lower shell 12 is set to make the module lower shell 12 The inner surface can be attached to the top surfaces of the two side walls and then combined and fixed by ultrasonic welding, so that the lower module 12 can provide a partial top surface of the acoustic channel 15, and the top of the module lower shell 12 and the two side walls The area of the face weld is the weld trace area 16. The shape of the lower casing 12 of the module can be set such that the inner surface of the lower casing 12 of the module is directly welded to the top surface of the second retaining wall 114. When the height of the second retaining wall 114 is low, the module can also be used in the module. The inner surface of the lower casing 12 forms a third retaining wall corresponding to the second retaining wall 114, and the third retaining wall and the corresponding surface of the second retaining wall 114 are ultrasonically welded to form a sidewall of the acoustic passage.

The bottom surface and side walls of the sounding passage 15 are provided by the module upper casing 11, and the top surface of the sounding passage 15 is provided by the module lower casing 12 and the suspension beam section 112. In this embodiment, a hollow portion 122 corresponding to the cantilever beam portion 112 is defined in the lower casing 12 of the module. The side of the hollow portion 122 adjacent to the sound generator unit 13 is an open structure and is connected to the sound generator unit. The one side of the hollow portion 122 away from the sound generator unit 13 and the other opposite side surfaces are respectively sealed with the suspension beam section 112 to achieve the fixing of the module lower shell 12 and the suspension beam section 112.

As a preferred embodiment, the soldering wire region 16 of the module lower case 12 and the second retaining wall 114 is connected to both ends of the cantilever beam segment 112 and has an angle with the cantilever beam segment 112. Of course, in other embodiments , the two can also be set in a straight line.

The glue application area is connected to the welding trace area 16 welded by the module lower shell 12 and the second retaining wall 114, so that the module lower shell 12 and the second retaining wall 114 and the suspension beam section 112 are respectively sealed to realize the sound passage 15 Sealed to prevent leakage. In this embodiment, the module lower shell 12 and the cantilever beam section 112 forming the acoustic channel can be sealed by glue coating, which can avoid the collapse phenomenon of the cantilever beam by using the sealing method such as ultrasonic welding, so that the sealing process of the sound channel is simple and easy. appear.

The cantilever section 112 includes an engaging portion on the side of the sounder unit 13 , and the connecting portion is glued to the side wall of the sound generator unit 13 , and the suspension beam section 112 further includes a connection with the connecting portion. The support portion can provide support for the sounder unit 13 in the region of the cantilever beam 112 to prevent the sounder unit 13 from being largely unsupported in the cantilever beam segment 112 and causing large vibration.

The module lower casing 12 and the top surface of the second upper wall 114 of the module upper casing 11 are ultrasonically welded to form an acoustic channel 15, and the sound outlet 121 on the module casing can be disposed on the lower casing 12 according to the sounding position. Or the upper casing 11 of the module, as shown in FIG. 3, in the embodiment, the sound outlet 121 is disposed on the lower casing 12 of the module.

The lower edge of the module lower casing 12 adjacent to the sound passage inlet 113 does not exceed the lower edge of the suspension beam section 112, and does not block the airflow, thereby ensuring smooth sounding of the sounder module and improving the sounder module. Sound quality and sensitivity and overall performance of the sounder module.

In this embodiment, the module lower case 12 and the periphery of the module upper case 11 have a joint surface for sealing and fixing to form a module outer casing, and the joint surface of the lower module 12 and the module upper case 11 of the module is sealed by ultrasonic welding. Form the module housing.

The cantilever beam segment 112 and the body portion of the module upper casing 11 form an elongated sounding passage inlet, and at least one supporting rib may be disposed between the suspension beam segment 112 and the body portion to enhance the stability of the cantilever beam segment 112.

In this embodiment, a part of the top surface of the sounding passage 15 is provided by the cantilever segment 112 of the module upper casing 11, and the top surface of the other portion is provided by the lower casing 12 of the module, and the upper casing 11 and the lower casing 12 of the module are formed together. Sound channel 15. The sounder module having such a structure can significantly increase the height of the sounding passage 15 in the sounder module in the case of the same module size, thereby improving sound smoothness. On the other hand, the size of the module can be reduced while maintaining the same size of the sound path 15 .

Embodiment 2

4 is an exploded perspective view showing a second embodiment of the sound generator module according to the present invention, FIG. 5 is a cross-sectional view showing a second embodiment of the sound generator module according to the present invention, and FIG. 6 is an enlarged schematic view showing a region B in FIG. The difference between the embodiment and the first embodiment is that in the embodiment, a hollow portion 222 is formed at a position corresponding to the cantilever segment 212 of the module lower shell 22, and the hollow portion 222 is a through hole having an annular side wall, and is hollowed out. The two ends of the portion, the side of the hollow portion away from the sounder unit and the cantilever beam are sealed with glue, and the end of the welding trace region 26 is connected with the glue to seal the sound channel.

In this embodiment, the lower casing of the module corresponds to the position of the sounder unit to form a mounting hole having an annular hole wall, and the edge of the mounting hole and the edge of the sounder unit can be conveniently glued and sealed.

As a preferred embodiment, the hollow portion 222 is an elongated through hole, and the cantilever segment 212 and the module lower case 22 are connected by applying glue to the through hole.

As a preferred embodiment, the end of the soldering trace region 26 of the module lower case 22 and the second retaining wall includes a portion disposed in line with the cantilever beam segment. Of course, in other embodiments, both may also It is set at an angle, as in the design of the first embodiment.

In this embodiment, the height of the sounding channel in the sounder module can be significantly increased in the case of the same module size, thereby improving the sound smoothness. Or, the size of the module can be effectively reduced while maintaining the same size of the sound channel. Different from the first embodiment, the hollow portion is a through hole having an annular side wall, so that the lower shell of the module can form a mounting hole having an annular hole wall corresponding to the position of the sound generator unit, which can facilitate the coating of the periphery of the sounder unit. Glue sealed. On the other hand, in the embodiment, by sealing the sound outlet channel by applying glue to the hollow portion 222 in the form of a through hole, the area of the glue seal can be reduced, the glue application process is relatively simple, and the partial area is not easily coated. Leakage situation. Other parts in this embodiment are similar to those in the first embodiment, and are not described herein again.

It is apparent that the above-described embodiments of the present invention are merely illustrative of the present invention and are not intended to limit the embodiments of the present invention, and those skilled in the art can also make the above description. It is to be understood that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

A sounder module includes a module housing and a sound generator unit housed in a cavity formed by the module housing, the sounder unit dividing the cavity into a front cavity and a rear cavity, The module housing is provided with an sound outlet, the front chamber includes an upstream cavity facing the sounder unit and an sound passage for connecting the upstream cavity and the sound outlet, the module housing The module upper case and the module lower case including ultrasonic welding together, wherein

The module upper case includes a body portion and an annular first retaining wall disposed on the body portion for supporting and fixing the sounder unit, and the sound generator unit and the first retaining wall are coated a first sealing wall surrounds the upstream cavity, and a section of the first retaining wall adjacent to the sounding channel is a cantilever beam segment, and an entrance of the sound channel is formed between the cantilever beam segment and the body portion ;

a second retaining wall connected to the cantilever beam segment and surrounding the sidewall of the sound channel is formed on the body portion, and the second retaining wall is ultrasonically welded to the lower shell of the module;

a portion of the lower shell of the module corresponding to the cantilever segment is provided with a hollow portion, a glue seal is sealed between the hollow portion and the cantilever portion, and the ultrasonic welding region corresponding to the second retaining wall is sealed The connection achieves a sealed sound path.
The sounder module of claim 1 wherein said cantilever section includes an engagement portion on a side of the sounder unit, said engagement portion being glued to the side wall of the sounder unit.
The sounder module of claim 2, wherein the cantilever beam segment further comprises a support portion coupled to the engagement portion for supporting the sounder unit.
The sound generator module according to claim 1, wherein the hollow portion is open to one side of the sounder unit and is butted to the sound generator unit, and both ends of the hollow portion are A glue seal is provided between the side of the hollow portion remote from the sounder unit and the cantilever beam.
The sound generator module according to claim 1, wherein the hollow portion is a through hole having an annular side wall, both ends of the hollow portion, and a side of the hollow portion remote from the sound generator unit Apply glue seal to the suspension beam section.
The sounder module according to claim 5, wherein the through hole is of an elongated shape, and the entire area of the through hole is coated with glue.
The sounder module of claim 1 wherein at least one support rib is disposed between the cantilever section and the body portion.
The sound generator module according to claim 1, wherein a third retaining wall corresponding to the second retaining wall is formed on the lower casing of the module, the third retaining wall and the second retaining wall The corresponding surface of the wall is ultrasonically welded.
The sound generator module according to claim 1, wherein the sound output port is formed on a lower case of the module corresponding to the end of the sound output channel.
The sound generator module according to claim 1, wherein the module upper case and the periphery of the lower case of the module are ultrasonically welded to form a module case.