CN208940233U

CN208940233U - Loudspeaker mould group

Info

Publication number: CN208940233U
Application number: CN201821861109.4U
Authority: CN
Inventors: 张军; 苏涛
Original assignee: Goertek Techology Co Ltd
Current assignee: Goertek Techology Co Ltd
Priority date: 2018-11-12
Filing date: 2018-11-12
Publication date: 2019-06-04
Anticipated expiration: 2028-11-12

Abstract

The utility model relates to a kind of loudspeaker mould groups.The loudspeaker mould group includes: module casing and loudspeaker monomer, and the inner space of the module casing is divided into the preceding operatic tunes and the rear operatic tunes by the loudspeaker monomer；It is provided at least one sound-absorbing part in the operatic tunes after described, each sound-absorbing part is arranged on the inner wall of the module casing；Wherein, at least one surface of the sound-absorbing part is the out-of-flatness surface that height rises and falls, and the surface area of the sound-absorbing part is configured as being greater than the surface area of square or cuboid with same volume.One of the utility model, which has the technical effect that, improves the acoustical behavior of loudspeaker.

Description

Loudspeaker module

Technical Field

The utility model relates to an acoustics technical field, more specifically, the utility model relates to a speaker module.

Background

The loudspeaker module is an important acoustic component of the portable electronic equipment, is used for completing the conversion between an electric signal and an acoustic signal, and is an energy conversion device. The existing loudspeaker module generally comprises a shell, a loudspeaker monomer is accommodated in the shell, and a diaphragm of the loudspeaker monomer separates the whole module cavity into a front sound cavity and a rear sound cavity.

At present, the rear sound cavity of the loudspeaker is generally small, and in order to better adjust the acoustic performance of the loudspeaker, FO (minimum resonant frequency) of a loudspeaker module is reduced, and the bandwidth is expanded. Those skilled in the art typically place sound absorbing materials or particles within the rear sound cavity to increase the virtual space of the rear sound cavity.

But traditional acoustic material is mostly planar design, and acoustic material's surface area is less relatively, and is limited to the promotion effect in back sound chamber virtual space, can't satisfy the harsh requirement of people to speaker module acoustics.

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

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a speaker module.

According to an aspect of the present invention, a speaker module is provided. The module includes: the loudspeaker single body divides the inner space of the module shell into a front sound cavity and a rear sound cavity;

at least one sound absorbing piece is arranged in the rear sound cavity, and each sound absorbing piece is arranged on the inner wall of the module shell;

wherein at least one surface of the sound-absorbing member is an uneven surface having undulations, and the surface area of the sound-absorbing member is configured to be larger than the surface area of a cube or a rectangular parallelepiped having the same volume.

Optionally, the sound absorbing member has a plurality of protrusions on at least one surface thereof to form the uneven surface.

Optionally, at least a part of the convex part is in a bump structure; or,

at least one part of the bulge part is of a linear structure.

Optionally, the cross-section of the boss is wedge-shaped.

Optionally, the cross section of the convex part is rectangular, arc-shaped or irregular.

Optionally, the uneven surface is wavy in cross-section.

Optionally, a peak angle of the wedge shape is less than or equal to 150 °.

Optionally, the sound absorbing member further comprises at least one flat surface, and the flat surface is fixedly connected with the inner wall of the module housing.

Optionally, the module housing includes an upper module housing and a lower module housing, the lower module housing is fastened to the upper module housing, and the speaker unit is fixed to the upper module housing;

the module epitheca has diapire and lateral wall, inhale the sound piece and fix on the diapire of module epitheca.

Optionally, the sound absorbing member has a height less than a height of the rear acoustic cavity.

The utility model discloses a technological effect lies in, sets up the sound piece of inhaling of irregular three-dimensional shape in the back sound chamber through the speaker module, has increased the surface area of inhaling the sound piece, can show the virtual space who enlarges back sound chamber, reduces F0, improves the low frequency response to promote the acoustic performance of speaker, obtain more excellent low frequency loudness.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

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

FIG. 2 is a schematic structural view of a sound absorbing member at different viewing angles according to an embodiment of the present invention;

FIG. 3 is a schematic view of another sound absorbing member according to an embodiment of the present invention;

fig. 4 is a schematic view of the position where the sound absorbing member is disposed according to the embodiment of the present invention.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be considered a part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Fig. 1 shows an exploded view of a speaker module according to the present invention, in which a plurality of sound absorbing members with different shapes are shown, fig. 2 shows a schematic structural view of the sound absorbing member at different viewing angles, fig. 3 shows a schematic structural view of another sound absorbing member at different viewing angles, and fig. 4 shows a schematic structural view of a plurality of sound absorbing members at positions in a module housing. The structure, principle, etc. of the speaker module according to the present invention will now be described in detail with reference to fig. 1 to 4.

The utility model provides a pair of speaker module, this speaker module include module casing 20 and speaker monomer 10, speaker monomer 10 will module casing 20's inner space is cut apart into preceding vocal chamber and back vocal chamber. In the technical field of speakers, a front sound cavity and a rear sound cavity are used for dividing different areas in a speaker module from the aspect of influencing the low-frequency and high-frequency performance of sound. Because the module shell is provided with a plurality of components, the rear sound cavity formed between the module shell 20 and the speaker unit 10 can be a rear sound cavity formed by an independent area, or a plurality of areas are communicated together to form the rear sound cavity. The speaker module provided by the embodiment comprises the two possible rear sound cavity structures.

Specifically, at least one sound absorbing member 30 is disposed in the rear sound cavity, and each sound absorbing member 30 is disposed on an inner wall of the module case 20. For example, when the rear sound chamber is constituted by a separate area, a sound absorbing member is provided in the rear sound chamber; when the rear sound chamber is constituted by two areas communicating together, as shown in fig. 4, the sound-absorbing member 301 and the sound-absorbing member 302 are respectively provided on the two communicating areas of the rear sound chamber.

Wherein, at least one surface of the sound absorbing piece 30 is an uneven surface 31 with undulation. The surface area of the sound-absorbing member 30 is configured to be larger than that of a cube or a rectangular parallelepiped having the same volume. It is understood that both cubes and cuboids are composed of regular surfaces, with common area and volume calculations, while a cube shape composed of at least one uneven surface is a calculation for an area or volume that is not directly available. If a structure is formed on the surface of the cuboid, the surface is uneven.

Further, the surface area of the sound-absorbing member 30 is configured to be larger than that of a cube or a rectangular parallelepiped having the same volume. For example, a wedge structure is a structure in which a rectangular parallelepiped is cleaved from its surface downward to form a structure with a concave center and a triangular cross section. The volume of the wedge structure is smaller than that of the original cuboid, but the surface area of the wedge structure is larger than that of the original cuboid. Obviously, when the sound absorbing piece with the irregular three-dimensional shape is used in the loudspeaker module, the surface area of the sound absorbing piece can be obviously increased, the sound absorbing effect of the sound absorbing piece is improved, the FO is reduced, and the effect of low-frequency response is improved.

Optionally, the sound absorbing member 30 has a plurality of protrusions 32 on at least one surface thereof to form the uneven surface 31. In the present embodiment, the projection 32 is a concept opposite to a flat surface, that is, the projection 32 may be a structure formed in any direction on the surface of the sound absorbing member 30. The uneven surface 31 formed by the protrusions 32 can increase the surface area of the sound absorbing member compared to a flat surface.

In one possible embodiment, at least a portion of the protrusions 32 are bump structures. For example, any one surface of the sound absorbing member having an uneven surface formed by a plurality of protrusions is selected. The uneven surface is a circular salient point structure protruding outwards, and the surface area of the sound absorbing piece can be increased through the circular salient point structure. In this embodiment, the number, size, etc. of the bump structures are not limited.

Alternatively, at least a part of the protrusion 32 is a linear structure. For example, any one surface of a cuboid sound-absorbing piece is selected, a plurality of convex strips are arranged on the surface, the space occupied by the convex strips is small, and the surface area of the sound-absorbing piece can be increased; meanwhile, the raised lines also have a certain guiding function on the air flow.

Preferably, the cross section of the boss 32 is wedge-shaped. The boss 32 is formed of at least one wedge structure. As shown in fig. 1, two different sound absorbing members are shown, and each of the sound absorbing member 301 and the sound absorbing member 302 is formed by connecting a plurality of wedge structures in sequence. The sound absorbing piece with the wedge-shaped structure protruding parts is not easy to deform, has the advantages of being small in occupied size and large in surface area, can increase the virtual size of the rear sound cavity, and is more effective in absorbing low frequency. The present embodiment does not limit specific parameters of the wedge-shaped sound absorbing member, such as the peak splitting angle and the peak splitting height of the wedge. The sound absorbing member can be made in different parameters and specifications by those skilled in the art according to the needs. Fig. 2 and 3 show that the sections of the projections of two different specifications are wedge-shaped sound absorbing members.

Specifically, the peak splitting angle of the wedge shape is less than or equal to 150 °. It will be appreciated that the angle of the peak is related to the number of wedges. The larger the angle of a single peak, the fewer the number of wedges formed on the sound absorbing member. In the sound piece of inhaling with wedge structure that this embodiment provided, the angle less than or equal to 150 of splitting the peak, in unit area or volume, it is better to promote the effect of inhaling the sound surface area.

Optionally, the cross section of the convex part is rectangular, arc-shaped or irregular. In this embodiment, the cross section of the protrusion can be formed in various shapes by changing the structure of the protrusion on at least one surface of the sound absorbing member. For example, the hemispherical sound absorbing member can be obtained by arranging a plurality of surfaces of the sound absorbing member in an arc shape; alternatively, one or more surfaces of the sound absorbing member may be selected and recessed to form an arbitrary shape. Therefore, the surface area of the sound absorbing piece is increased, the volume of the sound absorbing piece is reduced, and the sound absorbing effect of the sound absorbing piece is improved.

In another possible embodiment, at least one surface of the sound absorbing member 30 is an uneven surface 31 having a wavy cross section, and the uneven surface having the wavy cross section has an arc-shaped recess.

The surface extends upwards to different heights at different positions, a plurality of convex and concave structures can be formed relative to the flat upper surface, and the structures enable the section of the uneven surface to be wavy. Obviously, the uneven surface increases the surface area of the sound absorbing member. On one hand, the sound-absorbing piece is convenient to process and can be directly processed by a grinding tool; on the other hand, even undulant irregular surface, the high space of reserving in the back sound intracavity is unanimous, can not produce the hindrance to the air current for the flow of air current is more unobstructed, helps promoting the acoustic performance of speaker module.

In particular, the above-described wedge-shaped cross-section of the projection and the wavy cross-section of the uneven surface are only two alternative embodiments. The technical personnel in this field can set up the sound absorbing piece of other irregular three-dimensional shapes in the back sound cavity of speaker module as required, and under the same volume, the sound absorbing piece that is greater than the surface area of square or cuboid all is in the scope that this application includes. The utility model provides a speaker module sets up the sound piece of inhaling of irregular three-dimensional shape in the back sound chamber through speaker module, has increased the surface area of inhaling the sound piece, can show the virtual space that enlarges back sound chamber, reduces F0, improves the low frequency response to promote the acoustic performance of speaker, obtain more excellent low frequency loudness.

Further, inhale the sound piece still include at least one smooth surface, smooth surface with the inner wall fixed connection of module casing. As shown in fig. 2-4, the flat surface of the sound absorbing member is fixedly connected to the inner wall of the module case. The regular configuration of the flattened portions facilitates the fixing of the sound absorbing member in the module housing, for example, by gluing or in a manner familiar to those skilled in the art. Thus, by changing the volume of the sound absorbing member, the surface area of the sound absorbing member can be effectively increased. Meanwhile, compared with the sound absorbing piece of a cuboid or a cube structure, the sound absorbing piece of the irregular shape has smaller obstruction to the airflow and cannot influence the flowing of the airflow to cause interference.

In this embodiment, the module casing includes module epitheca and module inferior valve. As shown in fig. 1, the module lower case 22 is fastened to the module upper case 21, and further includes a speaker unit 10, a sound absorbing member 30, an FPCB40, and the like. The module upper case 21 has a bottom wall 211 and a side wall 212 partitioning the rear acoustic chamber. The side walls 212 are configured to divide the rear acoustic cavity into a plurality of communicating cavities, i.e., the rear acoustic cavity has a plurality of areas within which sound absorbing members 30 may be disposed. As shown in fig. 4, a sound absorbing member 301 and a sound absorbing member 302 are provided in each of the cavities. Therefore, the limitation of the structural shape of the rear sound cavity is avoided, the area in the rear sound cavity is more effectively utilized, and the purpose of improving the acoustic performance of the loudspeaker is achieved.

Specifically, the module epitheca has diapire and lateral wall, inhale the sound piece and fix on the diapire of module epitheca, perhaps on the lateral wall. The utility model provides an inhale sound spare can be according to the inner structure of speaker module, and selective setting is on the diapire and/or the lateral wall of module epitheca, and this embodiment does not do the restriction to this.

In addition, the outline of the bottom surface of each sound absorbing member 30 is identical to the outline of the bottom wall of the cavity. As shown in fig. 2 to 4, the sound-absorbing members 301 and 302 each have a contour shape conforming to the contour of the bottom wall of the cavity in the module upper case 21. The sound absorbing member 301 and the sound absorbing member 302 may be directly fixed to the bottom wall of the cavity. That is to say, can adjust the profile of inhaling the sound piece bottom surface as required to the profile of the diapire of cavity in the adaptation speaker module casing, in order to inhale the comprehensive setting of sound piece in the cavity, make full use of the space of cavity.

Further, the sound absorbing member has a height smaller than that of the rear sound cavity. Inhale between sound spare and the back sound chamber because of the vacant space of difference in height, the circulation of the air current of being convenient for, when the air current from inhaling sound spare top circulation, inhale sound spare by bellied irregular three-dimensional shape can be more comprehensive contact with the air current, absorb unnecessary sound wave energy, promote the acoustic performance of speaker module.

In addition, the sound absorbing member is made of porous foam. Such as melamine, polyester, or any material commonly used in the art, and will not be described in detail herein.

Although some specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for purposes of illustration and is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A loudspeaker module is characterized by comprising a module shell and a loudspeaker single body, wherein the loudspeaker single body divides the inner space of the module shell into a front sound cavity and a rear sound cavity;

2. The speaker module as claimed in claim 1, wherein the sound-absorbing member has protrusions on at least one surface thereof to form the uneven surface.

3. The speaker module as recited in claim 2, wherein at least a portion of said protrusions are in a bump configuration; or,

at least one part of the bulge part is of a linear structure.

4. The speaker module as recited in claim 2, wherein the boss has a wedge-shaped cross-section.

5. The speaker module as claimed in claim 2, wherein the cross-section of the protrusion is rectangular, arc-shaped or irregular.

6. The speaker module as claimed in claim 1, wherein the uneven surface has a wave-shaped cross-section.

7. The speaker module as claimed in claim 4, wherein the peak angle of the wedge shape is 150 ° or less.

8. A speaker module as claimed in claim 2, wherein the sound absorbing member further comprises at least one flat surface fixedly attached to an inner wall of the module housing.

9. The speaker module as claimed in claim 2, wherein the module housing comprises a module upper case and a module lower case, the module lower case being fastened to the module upper case, the speaker unit being fixed to the module upper case;

10. A loudspeaker module according to any one of claims 1 to 9, wherein the sound absorbing member has a height less than the height of the rear acoustic cavity.