阅读说明：本技术 一种扬声器外壳及扬声器 (Loudspeaker shell and loudspeaker ) 是由 陈敦汉 彭浩 于 2020-05-11 设计创作，主要内容包括：本发明提供了一种扬声器外壳及扬声器,所述的外壳用于所述的外壳的内壁上还设置有多个用于支撑所述的吸音材料块的支撑块。本发明的一种扬声器外壳及扬声器,支撑块从上方将吸音材料块固定在外壳的谐振腔内,使扬声器的结构更加稳定。(The invention provides a loudspeaker shell and a loudspeaker, wherein the inner wall of the shell used for the shell is also provided with a plurality of supporting blocks used for supporting sound-absorbing material blocks. According to the loudspeaker shell and the loudspeaker, the sound-absorbing material block is fixed in the resonant cavity of the shell from the upper part by the supporting block, so that the structure of the loudspeaker is more stable.)

1. The utility model provides a loudspeaker shell, the shell be used for installing the speaker body, the shell inside be the resonant cavity, the mountable sound material piece that inhales of resonant cavity, its characterized in that, the inner wall of shell on still be provided with a plurality of supporting shoes that are used for supporting sound material piece that inhales.

2. A loudspeaker enclosure according to claim 1 wherein the support block is part of the enclosure and is formed integrally with the enclosure.

3. A loudspeaker enclosure according to claim 1 wherein the enclosure is formed from a plastics material.

4. A loudspeaker comprising a housing as claimed in any one of claims 1 to 3.

5. The loudspeaker of claim 4 further comprising a speaker body mounted at the mounting opening of said enclosure, a block of sound absorbing material mounted between said backing block and said lower shell.

6. The speaker of claim 5, wherein said block of sound absorbing material is adhered to the upper surface of the lower case by a double-sided adhesive tape.

7. The loudspeaker in accordance with claim 6 wherein said block of sound absorbing material is a block structure, said block of sound absorbing material further comprising fibers, said fibers being arranged in a criss-cross pattern.

8. The loudspeaker of claim 7, wherein the block structure has a plurality of holes in the longitudinal direction, and sound absorbing material is filled between the holes.

9. The loudspeaker in accordance with claim 8 wherein at least a portion of the open ends of the plurality of openings in the block of sound absorbing material are exposed to the resonant cavity.

Technical Field

The invention relates to the technical field of electroacoustic, in particular to a loudspeaker shell and a loudspeaker.

Background

In utility model patent with publication number CN20190827, sound-absorbing cotton is filled between the inner wall of sound-absorbing material block and speaker container to play a supporting role, but the existence of sound-absorbing cotton can influence the air in the resonant cavity to smoothly enter into the pore of sound-absorbing material block.

Disclosure of Invention

The invention aims to provide a loudspeaker shell and a loudspeaker.

In order to solve the technical problem, the invention provides a loudspeaker shell, wherein a plurality of supporting blocks for supporting the sound-absorbing material blocks are further arranged on the inner wall of the shell.

Preferably, the support block is a part of the housing and is integrally formed with the housing.

Preferably, the material of the shell is made of plastic material.

The application also provides a loudspeaker, which comprises the shell.

Preferably, the loudspeaker further comprises a loudspeaker body mounted at the mounting opening of the housing, and a sound-absorbing material block mounted between the supporting block and the lower shell.

Preferably, the sound-absorbing material block is adhered to the upper surface of the lower case by a double-sided tape.

Preferably, the sound-absorbing material block is of a block structure, and the sound-absorbing material block further comprises fibers, and the fibers are arranged in a criss-cross manner.

Preferably, a plurality of pore channels are arranged in the longitudinal direction of the block structure, and sound absorption materials are filled between the pore channels.

Preferably, at least a portion of the open ends of the plurality of cells of the block of sound absorbing material are exposed to the resonant cavity.

According to the loudspeaker shell and the loudspeaker, the sound-absorbing material block is fixed in the resonant cavity of the shell from the upper part by the supporting block, so that the structure of the loudspeaker is more stable.

Drawings

Fig. 1 is a schematic structural view of a speaker of the present application;

FIG. 2 is a graph of frequency F0 corresponding to a peak in the impedance of the loudspeaker as a function of gap h for a loudspeaker of the present application having a housing interior height of 4 mm;

FIG. 3 is a graph of frequency F0 corresponding to a peak in the impedance of the loudspeaker as a function of gap h for a loudspeaker of the present application having a housing interior height of 5 mm;

fig. 4 is a top view of the block of sound absorbing material of the present application;

fig. 5 is a cross-sectional view of the sound-absorbing material block of the present application.

Wherein: 1. a sound absorbing material block; 2. a duct; 3. zeolite raw powder particles; 4. fibers; 5. double-sided adhesive tape; 6. A housing; 7. a speaker body; 8. a gap; 9. and (7) a supporting block.

Detailed Description

The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

As shown in fig. 1, the speaker comprises a speaker body 7, a housing 6 for mounting the speaker body 7, and a sound-absorbing material block 1 fixed in a resonant cavity of the housing 6, wherein the sound-absorbing material block 1 is bonded to the bottom of the housing 6 by a double-sided adhesive tape 5, and a gap 8 is formed between the sound-absorbing material block 1 and the top of the inner wall of the housing 6. The height h of the gap 8 is 0.1mm to 0.6 mm.

One or more supporting blocks 9 are arranged at the top of the inner wall of the shell 6, the supporting blocks 9 are part of the shell 6 and are integrally formed with the shell 6, and the lower ends of the supporting blocks 9 are supported on the upper surface of the sound-absorbing material block 1. The block of sound absorbing material 1 is fixed in the resonant cavity of the housing 6 from above by the support block 9, making the structure of the speaker more stable. In a preferred embodiment, the material of the housing 6 is a plastic material.

As shown in fig. 4 and 5, for the sound-absorbing material block 1 of the present application, the sound-absorbing material block 1 is a block structure, a plurality of pores 2 are formed in the longitudinal direction of the block structure, sound-absorbing materials are filled between the pores 2, the sound-absorbing materials include zeolite raw powder particles 3, fibers 4, and a binder for binding the zeolite raw powder particles 3 and the fibers 4 together, and the fibers 4 are arranged in a criss-cross manner; the mass ratio of the fibers 4 in the sound absorbing material is not more than 50%, at least one part of the zeolite raw powder particles 3 is MFI zeolite raw powder particles 3, and the mass ratio of silicon to aluminum in the MFI zeolite raw powder particles 3 is not less than 150. The raw zeolite powder particles 3 of the MFI structure have an average particle size of 100 nm to 10 μm. The binder is one of aluminum sol, silica sol, polyacrylate, polyurethane, epoxy resin, chloroprene rubber, silicon rubber and polyvinyl acetate. The mass proportion range of the binder in the sound-absorbing material is 1-20%. The addition of the fiber 4 in the sound absorption material block 11 enables the block to have better strength and toughness, the fiber 4 can be one or 2 of glass fibers or chemical fibers, after the fiber 4 is added, the sound absorption block can achieve larger strength by using less amount of binder, is not easy to deform and break, plays a role in reinforcement, and does not sacrifice sound absorption effect.

In the prior art, the sound absorbing material block 1 is usually formed by bonding zeolite powder particles by a bonding agent, and the structure is easy to fall off if bonded by a double-sided tape 5. In the present application, the fibers are added to the raw zeolite powder particles, and the double-sided tape 5 can fix the whole sound-absorbing material block 1 through the fibers. Therefore, in the present embodiment, the fibers not only enable the sound-absorbing material block 1 to achieve greater strength with a smaller amount of the binder, and to be less prone to deformation and breakage, thereby serving as a reinforcement, but also enable the whole sound-absorbing material block 1 to be bonded inside the housing 6 in cooperation with the double-sided tape 5.

The following table shows a comparison of the bonding strength between the prior art sound-absorbing material block and the fiber-containing sound-absorbing material block of the present application, and it can be seen from the following table that the bonding strength of the fiber-containing sound-absorbing material block of the present application is significantly improved.

As shown in fig. 2, the frequency F0 corresponding to the impedance peak of the speaker varies with the gap h when the internal height of the housing 6 of the speaker is 4mm, and as shown in fig. 4, the frequency F0 corresponding to the impedance peak of the speaker varies with the gap h when the internal height of the housing 6 of the speaker of the second embodiment is 5 mm. In a speaker system, the impedance curve is one of the important characteristics reflecting the performance of the speaker, and F0 corresponding to the impedance peak is generally regarded as the low-frequency resonance point F0 of the speaker system. In a loudspeaker system with a gas absorbing material added, the lower the frequency corresponding to the impedance peak, the better the absorption by the absorber. As can be seen from fig. 2 and 3, when the gap h is 0.1mm to 0.6mm, the low-frequency resonance point F0 is at a low value, and when h is 0.3mm, the low-frequency resonance point F0 is near the lowest point. Due to the existence of the gap 8, air molecules in the resonant cavity can smoothly enter the sound absorption block, so that the sound absorption effect of the sound absorption block is not sacrificed.

The above-mentioned embodiments are merely preferred embodiments for fully explaining the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.