CN108235219B

CN108235219B - Loudspeaker enclosure and method of assembling the same

Info

Publication number: CN108235219B
Application number: CN201810006484.9A
Authority: CN
Inventors: 陈致远
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2018-01-04
Filing date: 2018-01-04
Publication date: 2020-06-16
Anticipated expiration: 2038-01-04
Also published as: CN108235219A

Abstract

The invention provides a loudspeaker box, which comprises a lower cover, an upper cover, a sound production monomer, a sound guide channel and a flexible material layer, wherein the upper cover and the lower cover jointly enclose an accommodating space; the metal sheet comprises a through hole penetrating through the metal sheet, the flexible material layer is completely covered on the through hole and fixed on the metal sheet, and the flexible material layer is used for absorbing the higher harmonic energy of the front cavity. The invention also provides an assembling method of the loudspeaker box. Compared with the related art, the loudspeaker box and the assembling method thereof have the advantages that the loudspeaker box is small in distortion and good in acoustic performance.

Description

Loudspeaker enclosure and method of assembling the same

Technical Field

The invention relates to the field of acoustoelectric, in particular to a loudspeaker box applied to a portable electronic product and an assembling method thereof.

Background

With the advent of the mobile internet age, the number of smart mobile devices is increasing. Among the mobile devices, the mobile phone is undoubtedly the most common and portable mobile terminal device. At present, the functions of a mobile phone are very diverse, one of which is a high-quality music function, and thus, a speaker box for playing sound is widely applied to the current smart mobile devices.

Related art speaker box include the casing with accept in sound production monomer in the casing, sound production monomer is including the vibrating diaphragm that is used for the vibration sound production, the vibrating diaphragm with the casing interval sets up the sound chamber before forming, speaker box still includes with the sound channel of leading of preceding sound chamber and external intercommunication, preceding sound chamber with lead the sound channel and constitute jointly speaker box's antechamber.

However, in the speaker box of the related art, the front cavity cover plate of the casing is a rigid wall formed by a rigid plastic material or a metal material, and the casing is an integral sealing structure. And because of the resonance effect of the front cavity, the loudspeaker box can generate 2-time distortion spikes, 3-time distortion spikes and the like, so that the distortion is bad when the front cavity makes a sound, and the acoustic performance of the loudspeaker box is influenced.

Therefore, it is necessary to provide a new speaker box and a method for assembling the same to solve the above-mentioned technical problems.

Disclosure of Invention

The invention aims to provide a loudspeaker box with small distortion and good acoustic performance and an assembling method thereof.

In order to achieve the above object, the present invention provides a speaker box, including a lower cover, an upper cover assembled with the lower cover and enclosing together an accommodation space, a sound generating unit accommodated in the accommodation space, a sound guiding channel formed in the accommodation space, and a flexible material layer, wherein the sound generating unit and the upper cover enclose together a front sound cavity, the sound guiding channel connects the front sound cavity with the outside, the front sound cavity and the sound guiding channel together form a front cavity, the upper cover includes a body portion, a through hole penetrating through the body portion and communicating with the front cavity, and a metal sheet completely covering the through hole and fixed to the body portion; the metal sheet comprises a through hole penetrating through the metal sheet, the flexible material layer is completely covered on the through hole and fixed on the metal sheet, and the flexible material layer is used for absorbing vibration energy, particularly higher harmonic energy, of the front cavity.

Preferably, the through hole is arranged opposite to the sounding monomer.

Preferably, the flexible material layer is made of a glue material.

Preferably, the flexible material layer is made of liquid silicone.

Preferably, the flexible material layer comprises a main wall and a fixing wall extending outwards from the periphery of the main wall, the main wall is opposite to the through hole, and the fixing wall is of a double-layer structure and is respectively clamped and fixed on two sides of the metal sheet.

Preferably, the thickness of the metal sheet is 0.2mm, the thickness of the main body wall is 0.2mm, and the thickness of each layer of the fixing wall is 0.1 mm.

Preferably, the flexible material layer is formed by extrusion molding on the metal sheet and is formed integrally with the metal sheet.

Preferably, the metal sheet is a steel sheet.

The invention also provides an assembling method of the loudspeaker box, which comprises the following steps:

sheet metal extrusion molding flexible material layer shaping: spraying glue on the position, to be extruded, of the metal sheet, and extruding the flexible material layer on the metal sheet for forming;

and (3) injection molding of metal sheets: injection molding the metal sheet and the upper cover after the flexible material layer is extruded;

and assembling other parts.

The invention also provides an assembly method of the loudspeaker box, which comprises the following steps:

and (3) injection molding of metal sheets: injection molding the metal sheet and the upper cover;

sheet metal extrusion molding flexible material layer shaping: performing extrusion molding treatment on the upper cover subjected to injection molding with the metal sheet to enable the flexible material layer to be extruded and molded on the metal sheet;

and assembling other parts.

Compared with the prior art, the loudspeaker box and the assembling method thereof have the advantages that the upper cover is provided with the through hole communicated with the front cavity, and the metal sheet is covered on the through hole to form fixation so as to improve the audio performance; simultaneously be in set up the perforation that runs through on it on the sheetmetal to set up flexible material layer through extrusion molding technology shaping in the sheetmetal makes flexible material layer lid is located it is fixed to perforate formation, through flexible material layer absorbs higher harmonic in the front cavity to reduce front cavity resonance peak and distortion, and then improved loudspeaker box's acoustic performance.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

FIG. 1 is a schematic perspective view of a speaker box according to the present invention;

FIG. 2 is an exploded perspective view of a portion of the speaker cabinet of the present invention;

FIG. 3 is a sectional view taken along line A-A of FIG. 1;

FIG. 4 is a block flow diagram of a loudspeaker enclosure assembly method of the present invention;

fig. 5 is a block flow diagram of another method of assembling a loudspeaker enclosure of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a speaker box 100, which includes a lower cover 1, an upper cover 2 covering the lower cover 1, a sound generating unit 3, a sound guiding channel 4 and a flexible material layer 5.

The upper cover 2 and the lower cover 1 together enclose a containing space 10. The upper cover 2 and the lower cover 1 may be an integrated structure.

The sounding single body 3 is fixedly accommodated in the accommodating space 10. The sounding single body 3 and the upper cover 2 are arranged at intervals and jointly enclose to form a front sounding cavity 6; the sounding unit 3, the upper cover 2 and the lower cover 1 together enclose a rear cavity 102.

The sound guide channel 4 is formed in the accommodating space 10, and specifically, the sound guide channel 4 is formed in the upper cover 2. The sound guide channel 4 and the upper cover 2 can also be of an integrally formed structure. The sound guide channel 4 is used for communicating the front sound cavity 6 with the outside and forming a side sound production structure.

That is, in the present embodiment, the sound generating unit 3 divides the accommodating space 10 into a front cavity 101 and the rear cavity 102, wherein the front cavity 101 includes the front sound cavity 6 and the sound guiding channel 4 for outputting sound; the back volume 102 is used to improve the low frequency acoustic performance of the loudspeaker enclosure 100.

In the present embodiment, the upper cover 2 includes a main body 21, a through hole 22 provided through the main body 21, and a metal piece 23.

The through hole 22 is in communication with the front cavity 101, and the through hole 22 may be in direct communication with the front sound cavity 6 or in direct communication with the sound guide channel 4. In the present embodiment, the through hole 22 is disposed through the upper cover 2, and the shape thereof is not limited, and may be rectangular, circular, or other shapes. Preferably, the through hole 22 is opposite to the sounding monomer 3.

The metal sheet 23 completely covers the through hole 22 and is fixed to the body 21 for improving audio performance, and the metal sheet 23 includes a through hole 231 penetrating therethrough. As above, the shape of the through hole 231 is not limited, and may be rectangular, circular or other shapes. The through hole 231 is opposite to the sounding unit 3.

In the present embodiment, the metal sheet 23 is preferably a steel sheet having a thickness of 0.2 mm.

The flexible material layer 5 completely covers the through hole 231 and is fixed to the metal sheet 23 for absorbing vibration energy, especially higher harmonic energy, of the front cavity 101. Therefore, 2 times, 3 times and other distortion peaks generated by the loudspeaker box 100 in distortion are avoided, and the hearing sense of the sound production performance is improved.

Specifically, the flexible material layer 5 is made of a rubber material, such as solid high-temperature vulcanized silicone rubber. Of course, the present invention is not limited thereto, and may be made of other sound absorbing materials. Preferably, the flexible material layer 5 is made of liquid silicone. The liquid silicone rubber has better elasticity, tear strength, fluidity and other properties than solid high-temperature vulcanized silicone rubber.

In the present embodiment, the flexible material layer 5 is formed on the metal sheet 23 by extrusion molding. The extrusion molding mode can be with flexible material layer 5 is made thin, and is littleer in thickness direction space demand, and very big degree guarantees the cavity volume of antechamber 101.

Specifically, the flexible material layer 5 includes a main body wall 51 and a fixing wall 52 extending outward from the periphery of the main body wall 51. The main body wall 51 is opposite to the through hole 231, and the fixing walls 52 are of a double-layer structure and are respectively clamped and fixed on two sides of the metal sheet 23. The double-layered structure of the fixing wall 52 enhances the fixing strength, and improves the reliability of the speaker box 100.

Preferably, the thickness of the main body wall 51 is 0.2mm, and the thickness of each fixing wall 52 is 0.1mm, so as to form an encapsulation structure and enhance the reliability. Therefore, when the loudspeaker box 100 is used, only 0.1mm of avoidance needs to be made additionally.

Through the design that the flexible material layer 5 is covered on the through hole 231 communicated with the front cavity 101, and the flexible material layer 5 has a resonant frequency, when the resonant frequency of the flexible material layer 5 is adjusted to a certain frequency, in the vicinity of the resonant frequency, when the loudspeaker box 100 produces sound, the energy in the front cavity 101 and in the vicinity of the resonant frequency of the flexible material layer 5 is transmitted to the outside, so that the purpose of absorbing the energy in the vicinity of the resonant frequency is achieved, and the generation of distortion spikes and the bad distortion phenomenon are avoided.

The above object is achieved by designing the material, area, shape and thickness of the flexible material layer 5. In this embodiment, the flexible material layer 5 forms a partial structure of the front cavity 101, and absorbs energy near a resonance peak of the front cavity 101 of the speaker box 100, so as to weaken a distortion spike of the front cavity 101, thereby improving the acoustic performance of the speaker box 100.

Referring to fig. 4, the present invention further provides an assembling method of the speaker box, including the following steps:

step S41, forming the metal sheet extrusion molding flexible material layer: and spraying glue on the position to be extruded of the metal sheet 23, and extruding the flexible material layer 5 on the metal sheet 23 for forming.

In this step, the purpose of spraying the glue is to prevent the metal sheet 23 from separating from the flexible material layer 5, thereby improving the reliability.

The flexible material layer 5 is made of a rubber material, such as solid high-temperature vulcanized silicone rubber. Of course, the present invention is not limited thereto, and may be made of other sound absorbing materials. Preferably, the flexible material layer 5 is made of liquid silicone. The liquid silicone rubber has better elasticity, tear strength, fluidity and other properties than solid high-temperature vulcanized silicone rubber.

Step S42, injection molding of metal sheets: and injection molding the metal sheet 23 and the upper cover 2 after extruding the flexible material layer 5.

And step S43, assembling other components. This step includes fixing the sounding unit 3 and assembling the lower cover 1 and other parts, for example, fixing the lower cover 1 and the upper cover 2 by ultrasonic welding. It should be noted that the assembly of other components in this step is a conventional assembly method, and is not described herein again.

In the assembling method, the mould for extruding the flexible material layer 5 is smaller, more mould cavities can be formed on the mould with the same volume, and the cost is relatively lower.

Referring to fig. 5, the present invention further provides an assembling method of the speaker box, which is substantially the same as the assembling method described above, except that the assembling method is performed in a sequence corresponding to the first two steps, and the assembling method includes the following steps:

step S51, injection molding of metal sheets: the metal sheet 23 and the upper cover 2 are injection molded.

Step S52, forming the metal sheet extrusion molding flexible material layer: performing extrusion molding on the upper cover 2 after injection molding with the metal sheet 23 to extrude the flexible material layer 5 on the metal sheet 23 for molding;

and step S53, assembling other components.

In the method, the flexible material layer 5 does not need to be subjected to a high-temperature environment of injection molding, so that the manufacturing process is safer, the risk is lower, and the reliability is higher.

While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.

Claims

1. A loudspeaker box comprises a lower cover, an upper cover assembled with the lower cover and jointly enclosing an accommodating space, a sound generating monomer accommodated in the accommodating space and a sound guide channel formed in the accommodating space, wherein the sound generating monomer and the upper cover jointly enclose a front sound cavity, the sound guide channel enables the front sound cavity to be communicated with the outside, the front sound cavity and the sound guide channel jointly form a front cavity, the upper cover comprises a body part, a through hole penetrating through the body part and communicated with the front cavity, and a metal sheet completely covering the through hole and fixed on the body part, the metal sheet comprises a through hole penetrating through the metal sheet, the loudspeaker box further comprises a flexible material layer completely covering the through hole and fixed on the metal sheet, and the flexible material layer absorbs the vibration energy of the front cavity and is characterized in that the flexible material layer comprises a main body wall and a fixed wall extending outwards from the periphery of the main body wall, the main part wall with the perforation is just to setting up, the fixed wall is bilayer structure and presss from both sides respectively to establish and be fixed in the both sides of sheetmetal, flexible material layer through extrusion molding in the sheetmetal and with the sheetmetal shaping is as an organic whole.

2. A loudspeaker enclosure according to claim 1, wherein the perforations are located directly opposite the sound generating cells.

3. A loudspeaker enclosure according to claim 1, wherein the layer of flexible material is of glue.

4. A loudspeaker enclosure according to claim 3, wherein the layer of flexible material is made of liquid silicone.

5. A loudspeaker enclosure according to claim 1, wherein the sheet metal thickness is 0.2mm, the body wall thickness is 0.2mm and each layer thickness of the fixing wall is 0.1 mm.

6. A loudspeaker enclosure according to claim 1, wherein the metal sheet is a steel sheet.

7. A method of assembling a loudspeaker enclosure according to any one of claims 1 to 6, comprising the steps of:

and (3) injection molding of metal sheets: and injection molding the metal sheet and the upper cover after extruding the flexible material layer.

8. A method of assembling a loudspeaker enclosure according to any one of claims 1 to 6, comprising the steps of:

sheet metal extrusion molding flexible material layer shaping: will with behind the sheetmetal injection moulding the upper cover carries out the extrusion molding and handles, makes flexible material layer extrusion molding in the sheetmetal shaping.