CN220798534U - Acoustic enhancement structure, speaker and electronic device - Google Patents

Abstract

The utility model discloses an acoustic enhancement structure, a loudspeaker and electronic equipment, wherein the acoustic enhancement structure comprises an acoustic enhancement piece and an air diffusion piece, the acoustic enhancement piece is connected with the air diffusion piece, the air diffusion rate of the acoustic enhancement piece is lower than that of the air diffusion piece, the air diffusion piece forms an air diffusion channel, the acoustic enhancement piece comprises a plurality of sound absorption particles, and at least two sides of the air diffusion channel are provided with a plurality of sound absorption particles. The acoustic enhancement structure provided by the utility model has the advantages of high adsorption efficiency on air molecules and good expansion effect on the rear acoustic cavity.

Description

Acoustic enhancement structure, speaker and electronic device

Technical Field

The utility model relates to the technical field of speakers, in particular to an acoustic enhancement structure, a speaker and electronic equipment.

Background

In the field of mobile phone audio, a micro speaker is a main sound unit. The sound pressure level sensitivity low frequency cut-off frequency of the micro-speaker is also determined by the volume of the sound cavity after the device itself. The larger the rear acoustic cavity volume, the lower its low frequency cut-off frequency. However, limited by the cell phone space limitations, the volume of the acoustic cavity is often insufficient thereafter, and thus the cell phone audio low frequency cut-off frequency is high. The acoustic enhancement material (Nbass) is an acoustic porous material, which can enhance the adsorption and desorption of air molecules through unique materials and structural designs, and can achieve the effect of increasing the size of the virtual rear acoustic cavity space and reducing the low-frequency cut-off frequency by filling the rear acoustic cavity with an acoustic enhancement structure containing the acoustic enhancement material.

However, the air diffusion efficiency of the acoustic enhancement material in the related art is low, and the situation that air cannot diffuse to one end of the acoustic enhancement structure far away from the generating unit easily occurs, so that the defect that the absorption efficiency of the acoustic enhancement structure is low and the capacity expansion effect of the rear acoustic cavity is poor exists.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent.

Therefore, the embodiment of the utility model provides an acoustic enhancement structure, which has the advantages of high adsorption efficiency on air molecules and good expansion effect on a rear acoustic cavity.

The embodiment of the utility model also provides a loudspeaker.

The embodiment of the utility model further provides electronic equipment.

The acoustic enhancement structure comprises an acoustic enhancement piece and an air diffusion piece, wherein the acoustic enhancement piece is connected with the air diffusion piece, the air diffusion rate of the acoustic enhancement piece is lower than that of the air diffusion piece, the air diffusion piece forms an air diffusion channel, the acoustic enhancement piece comprises a plurality of sound absorption particles, and at least two sides of the air diffusion channel are provided with the plurality of sound absorption particles.

According to the acoustic enhancement structure of the embodiment of the utility model, the acoustic enhancement piece and the air diffusion piece are arranged in the rear acoustic cavity of the loudspeaker, air is vibrated when the sound production unit of the loudspeaker works, and the air diffuses towards the rear acoustic cavity. Wherein, the air passes through the one end that sound production unit was kept away from to the acoustical enhancement piece to the air diffusion passageway, and a plurality of sound absorption particles of one end that sound production unit was kept away from in the acoustical enhancement piece divide to locate the at least both sides of air diffusion passageway, so that a plurality of sound absorption particles of one end that sound production unit was kept away from in the acoustical enhancement piece are higher to the adsorption efficiency of air molecule, and the dilatation effect to the back sound cavity is better, and the low frequency cut-off frequency of speaker is lower.

In some embodiments, the air diffusion channel extends through the acoustic reinforcement.

In some embodiments, the air diffuser comprises a cylindrical structure, an inner cavity of the cylindrical structure constituting the air diffusion channel.

In some embodiments, the tubular structure comprises a scrim or gauze.

In some embodiments, the air diffuser comprises a porous structure, with built-in cells in at least a portion of the porous structure constituting the air diffusion channel.

In some embodiments, a plurality of the sound-absorbing particles are uniformly disposed on the porous structure, any adjacent two of the sound-absorbing particles being spaced apart.

In some embodiments, the porous structure comprises foam.

In some embodiments, the sound absorbing particles comprise zeolite raw powder.

In some embodiments, the sound absorbing particles include a binder and a plurality of zeolite raw powders, the binder being bonded to the plurality of zeolite raw powders.

In some embodiments, the binder is an inorganic binder or an organic polymer binder, the inorganic binder comprises an aluminum sol or a silica sol, and the organic polymer binder is polyacrylate, polyurethane, epoxy, neoprene, silicone rubber, or polyvinyl acetate.

The speaker according to an embodiment of the present utility model includes a housing having a receiving cavity, a sound generating unit installed in the receiving cavity and dividing the receiving cavity into a rear sound cavity and a front sound cavity, and an acoustic enhancement structure installed in the rear sound cavity, the air diffusion channel extending in a direction approaching and separating from the sound generating unit.

The technical advantages of the speaker according to the embodiment of the present utility model are the same as those of the acoustic enhancement structure of the above embodiment, and will not be described here again.

In some embodiments, the speaker further comprises a cover plate, a filling port communicated with the rear acoustic cavity is formed in the shell, a plurality of sound absorbing particles in the acoustic enhancement piece are filled in the rear acoustic cavity through the filling port, and the cover plate is connected with the shell and seals the filling port.

In some embodiments, the air diffuser is coupled to the housing and separates the rear acoustic chamber to form at least two chambers, the chambers being in one-to-one correspondence with the fill ports.

An electronic device according to an embodiment of the utility model comprises an acoustic enhancement structure as described in any of the embodiments above or a loudspeaker as described in any of the embodiments above.

Technical advantages of the electronic device according to the embodiment of the present utility model are the same as those of the acoustic enhancement structure and the speaker of the above embodiment, and will not be described here again.

Drawings

Fig. 1 is a schematic diagram of an acoustic enhancement structure according to an embodiment of the present utility model.

Fig. 2 is another schematic view of an acoustic enhancement structure according to an embodiment of the present utility model.

Fig. 3 is yet another schematic diagram of an acoustic enhancement structure according to an embodiment of the present utility model.

Reference numerals:

100. an acoustic enhancement structure; 1. an acoustic enhancement; 11. sound absorbing particles; 2. an air diffuser; 3. an air diffusion channel.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

An acoustic enhancement structure 100 according to an embodiment of the present utility model is described below in conjunction with fig. 1-3.

The acoustic enhancement structure 100 according to an embodiment of the present utility model includes an acoustic enhancement member 1 and an air diffusion member 2. The acoustic reinforcement 1 is connected to the air diffuser 2, and the air diffusivity of the acoustic reinforcement 1 is lower than the air diffusivity of the air diffuser 2. Wherein the air diffuser 2 constitutes an air diffuser channel 3, the acoustic reinforcement 1 comprises a plurality of sound absorbing particles 11, and at least two sides of the air diffuser channel 3 are provided with a plurality of sound absorbing particles 11.

According to the acoustic enhancement structure 100 of the embodiment of the present utility model, the acoustic enhancement member 1 and the air dispersion member 2 are installed in the rear acoustic chamber of the speaker, vibrate air when the sound generating unit of the speaker is operated, and the air is dispersed toward the rear acoustic chamber. Wherein, the air diffuses to the end of the acoustic enhancement member 1 far away from the sound generating unit through the air diffusion channel 3, and a plurality of sound absorbing particles 11 of the end of the acoustic enhancement member 1 far away from the sound generating unit are respectively arranged on at least two sides of the air diffusion channel 3, so that the adsorption efficiency of the plurality of sound absorbing particles 11 of the end of the acoustic enhancement member 1 far away from the sound generating unit on air molecules is higher, the capacity expansion effect on a rear sound cavity is better, and the low-frequency cut-off frequency of the loudspeaker is lower.

In some embodiments, as shown in fig. 1-3, the air diffusion channel 3 extends through the acoustic reinforcement 1.

When the acoustic enhancement structure 100 is installed in the rear acoustic cavity of the speaker, the extending direction of the air diffusion channel 3 is generally consistent with the direction away from and close to the acoustic unit, and at this time, air diffusion is arranged to penetrate through the acoustic enhancement member 1, so that air is more smoothly diffused to the end, away from the acoustic unit, of the acoustic enhancement member 1, and the adsorption efficiency of the acoustic enhancement member 1 on air molecules is further ensured.

There may be one or a plurality of air diffusion channels 3. When there is one air diffusion channel 3, the projection of the air diffusion channel 3 along the extending direction thereof is located at the center of the projection of the acoustic reinforcement 1, and when there are a plurality of air diffusion channels 3, the plurality of air diffusion channels 3 are parallel to each other.

In some embodiments, as shown in fig. 1, the air diffuser 2 comprises a cylindrical structure, the inner cavity of which forms the air diffusion channel 3.

The air diffusion channel 3 is a through hole, and compared with the air diffusion member 2, the air diffusion rate is higher, the air is more easily diffused to one end of the air diffusion channel 3 far away from the sound generating unit, and then passes through the wall of the air diffusion member 2 and is adsorbed by the sound absorbing particles 11 on the periphery side of the air diffusion member 2.

The cross-sectional outer contour of the air diffusion passage 3 is any one of a circle, a regular polygon, and an irregular pattern.

In some embodiments, the tubular structure comprises a scrim or gauze. The mesh openings on the mesh cloth and gauze allow the air to have a higher diffusivity in the wall of the tubular structure, and the sound absorbing particles 11 in the acoustic reinforcement 1 have a better effect of absorbing air molecules.

Taking the sound-absorbing particles 11 as spheres as an example, the mesh openings in the mesh cloth or gauze are smaller than the diameters of the sound-absorbing particles 11 so that the sound-absorbing particles 11 enter the air diffusion channel 3 through the mesh openings.

In some embodiments, as shown in fig. 2 and 3, the air diffuser 2 comprises a porous structure, with built-in cells in at least part of the porous structure constituting the air diffusion channels 3.

That is, the air diffusion channel 3 is a part of the air diffusion member 2, and the air diffusion rate of the air diffusion channel 3 formed by the porous structure is still higher than that of the acoustic reinforcement member 1, so that the diffusion efficiency of air in the rear acoustic cavity can be improved as well, and the expansion effect of the rear acoustic cavity of the loudspeaker can be further improved.

In some embodiments, as shown in fig. 3, a plurality of sound-absorbing particles 11 are uniformly arranged on the porous structure, with any adjacent two sound-absorbing particles 11 being spaced apart.

At this time, the gaps between any two adjacent sound-absorbing particles 11 in the air diffuser 2 may form a part of the air diffusion channels 3, in other words, the air diffuser 2 may form countless air diffusion channels 3, and each sound-absorbing particle 11 is always adjacent to at least one air diffusion channel 3, thereby further ensuring the adsorption efficiency of each sound-absorbing particle 11 to air molecules and further improving the expansion effect of the rear acoustic cavity of the speaker.

In this embodiment, the sound absorbing particles 11 are adhered to the porous structure by the adhesive, and the acoustic enhancement structure 100 can be matched with the rear sound cavity of any shape by cutting, so that the installation difficulty of the acoustic enhancement structure 100 on the speaker is lower.

In some embodiments, the porous structure is foam, the foam is cheap and has high air diffusivity, and air can be rapidly diffused to the rear end position of the rear acoustic cavity through the foam, so as to ensure the adsorption efficiency of each sound absorbing particle 11 to air molecules.

In some embodiments, as shown in fig. 3, the sound absorbing particles 11 comprise zeolite raw powder. At this time, the micropores of the sound-absorbing particles 11 can realize strong adsorption of air molecules. The built-in pore canal of the air diffusion member 2 can form mesopores and macropores so as to ensure the rapid exchange of air molecules and zeolite raw powder, thereby solving the problem of low adsorption efficiency of the zeolite raw powder with a longer distance to the air molecules.

In some embodiments, as shown in fig. 1 and 2, the sound-absorbing particles 11 include a binder and a plurality of zeolite raw powders, and the binder is bonded to the plurality of zeolite raw powders. This arrangement allows the sound-absorbing particles 11 to have a sufficient volume while ensuring a high adsorption efficiency, thereby facilitating reliable connection of the sound-absorbing particles 11 to the air diffuser 2.

The pore diameter is smaller than 2nm and is called micropores, the pore diameter is larger than 50nm and is called macropores, and the pore diameter is between 2nm and 50nm and is called mesopores. In this embodiment, the mesoporous structure is formed between two adjacent zeolite raw powders in the sound-absorbing particles 11, and the macroporous structure is formed between two adjacent sound-absorbing particles 11. In this embodiment, the sound-absorbing particles 11 have a spherical, ellipsoidal, or irregularly spherical structure. The local peak range of the aperture of the sound-absorbing particles 11 is between 0.05mm and 1mm, and the space utilization rate of the rear acoustic cavity is higher when the rear acoustic cavity is filled with the sound-absorbing particles 11.

In some embodiments, the binder is an inorganic-based binder including an aluminum sol or a silica sol or an organic-based binder that is polyacrylate, polyurethane, epoxy, neoprene, silicone rubber, or polyvinyl acetate.

In this embodiment, the binder is an organic polymer binder, namely, polyacrylate. The mass proportion of the binder in the sound-absorbing particles 11 is in the range of 5%.

A speaker according to an embodiment of the present utility model includes a housing, a sound generating unit, and an acoustic enhancement structure 100 as in any of the embodiments described above. The housing has a receiving chamber, the sound generating unit is installed in the receiving chamber and divides the receiving chamber into a rear sound chamber and a front sound outlet chamber, the acoustic reinforcing structure 100 is installed in the rear sound chamber, and the air diffusion channel 3 extends in a direction approaching and departing from the sound generating unit.

The technical advantages of the speaker according to the embodiment of the present utility model are the same as those of the acoustic enhancement structure 100 of the above embodiment, and will not be described here again.

In some embodiments, the speaker further comprises a cover plate, the shell is provided with a filling port communicated with the rear acoustic cavity, the plurality of sound absorbing particles 11 in the acoustic enhancement member 1 are filled in the rear acoustic cavity through the filling port, and the cover plate is connected with the shell and seals the filling port.

That is, the plurality of sound-absorbing particles 11 of the acoustic reinforcement 1 are filled in the rear acoustic cavity through the filling port, and the adjacent two sound-absorbing particles 11 are abutted and relatively slidable, and the outer contour of the acoustic reinforcement 1 is mainly defined by the inner wall of the rear acoustic cavity, which does not have the capability of maintaining the shape itself.

In some embodiments, the air diffuser 2 is connected to the housing and separates the rear acoustic chamber into at least two chambers, the chambers being in one-to-one correspondence with the fill ports.

Firstly, the air diffusion piece 2 is arranged in the rear acoustic cavity, so that the relative fixation of the air diffusion piece 2 and the shell is ensured, and at the moment, the air diffusion channel 3 is preformed in the rear acoustic cavity. The sound absorbing particles 11 are then filled into the respective chambers through the filling openings, and after filling, the cover plate closes all filling openings to effect the mounting of the acoustic enhancement structure 100 on the loudspeaker.

An electronic device according to an embodiment of the utility model comprises an acoustic enhancement structure 100 as in any of the embodiments described above or a loudspeaker as in any of the embodiments described above.

Technical advantages of the electronic device according to the embodiment of the present utility model are the same as those of the acoustic enhancement structure 100 and the speaker of the above embodiment, and will not be described here again.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the utility model.

Claims (14)

1. An acoustic enhancement structure comprising an acoustic enhancement member and an air diffuser, said acoustic enhancement member being associated with said air diffuser, said acoustic enhancement member having a lower air diffusivity than said air diffuser, wherein,

the air diffusion piece forms an air diffusion channel, the acoustic reinforcement piece comprises a plurality of sound absorption particles, and at least two sides of the air diffusion channel are provided with a plurality of sound absorption particles.

2. The acoustic enhancement structure of claim 1, wherein the air diffusion channel extends through the acoustic enhancement member.

3. The acoustic enhancement structure of claim 1, wherein the air diffuser comprises a cylindrical structure, an interior cavity of the cylindrical structure constituting the air diffusion channel.

4. An acoustic enhancement structure according to claim 3 wherein said tubular structure comprises a scrim or gauze.

5. The acoustic enhancement structure of claim 1, wherein the air diffuser comprises a porous structure, and wherein built-in cells in at least a portion of the porous structure constitute the air diffusion channel.

6. The acoustic enhancement structure of claim 5 wherein a plurality of said sound absorbing particles are uniformly disposed on said porous structure, any adjacent two of said sound absorbing particles being spaced apart.

7. The acoustic enhancement structure of claim 5, wherein the porous structure comprises foam.

8. The acoustical enhancement structure of any of claims 1, 2, and 5-7, wherein the sound absorbing particles comprise zeolite raw powder.

9. The acoustical enhancement structure of any of claims 1-7, wherein said sound absorbing particles comprise a binder and a plurality of zeolite powders, said binder being bonded to a plurality of said zeolite powders.

10. The acoustic enhancement structure of claim 9, wherein the binder is an inorganic binder or an organic polymer binder, the inorganic binder comprising an aluminum sol or a silica sol, the organic polymer binder being polyacrylate, polyurethane, epoxy, neoprene, silicone rubber or polyvinyl acetate.

11. A loudspeaker comprising a housing having a receiving cavity, a sound generating unit mounted in the receiving cavity and dividing the receiving cavity into a rear sound cavity and a front sound cavity, and an acoustic enhancement structure mounted in the rear sound cavity, the air diffusion channel extending in a direction toward and away from the sound generating unit.

12. The loudspeaker of claim 11, further comprising a cover plate, wherein the housing is provided with a filling port in communication with the rear acoustic cavity, wherein the plurality of sound absorbing particles in the acoustic reinforcement are filled in the rear acoustic cavity through the filling port, and wherein the cover plate is connected to the housing and closes the filling port.

13. The loudspeaker of claim 12, wherein the air diffuser is coupled to the housing and separates the rear acoustic chamber to form at least two chambers, the chambers being in one-to-one correspondence with the fill ports.

14. An electronic device comprising an acoustic enhancement structure according to any of claims 1-10 or a loudspeaker according to any of claims 11-13.