CN212305646U

CN212305646U - High tone quality sound membrane

Info

Publication number: CN212305646U
Application number: CN202021132162.8U
Authority: CN
Inventors: 吕乙清
Original assignee: Xiamen Ouying Electronic Co ltd
Current assignee: Xiamen Ouying Electronic Co ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-01-05
Anticipated expiration: 2030-06-18

Abstract

The utility model relates to a high tone quality sound membrane, including inner circle ball top plate, middle ring vibration strengthening band and outer lane fixed band, wherein, inner circle ball top plate, middle ring vibration strengthening band and outer lane fixed band are made by PET graphite alkene combined material, and inner circle ball top plate reaches and is close to the upper surface facing of the middle ring vibration strengthening band portion of inner circle ball top plate has the one deck aluminium foil. Through attached aluminium foil, sound membrane rigidity improves, can the spread width for earphone sound is fuller, and the tone quality is abundanter, and tone quality is better.

Description

High tone quality sound membrane

Technical Field

The utility model relates to an earphone field specifically relates to a high tone quality sound membrane.

Background

The sound film of the existing earphone is made of a PET substrate and a graphene coating. Although the sound film is good in low frequency, the bandwidth of the sound film is not long enough, bass, middle and treble cannot be covered, and particularly, the sound film is poor in high frequency response, so that the high frequency distortion rate of sound is high, the overall tone quality and tone color of the earphone are affected, and the sound is not full enough.

Disclosure of Invention

The utility model aims at providing a high tone quality sound membrane to solve above-mentioned problem. Therefore, the utility model discloses a specific technical scheme as follows:

the high-sound-quality sound film comprises an inner ring ball top plate, a middle ring vibration reinforcing band and an outer ring fixing band, wherein the inner ring ball top plate, the middle ring vibration reinforcing band and the outer ring fixing band are all made of a PET graphene composite material, and a layer of aluminum foil is attached to the upper surfaces of the inner ring ball top plate and the middle ring vibration reinforcing band close to the inner ring ball top plate.

Further, the aluminum foil is between 10 and 50 microns thick.

Further, the aluminum foil is attached to the upper surfaces of the inner ring ball top plate and the middle ring vibration reinforcing band part close to the inner ring ball top plate through glue.

Further, the PET graphene composite material of the central portion of the top sheet of the inner hoop bead is dug away.

Still further, the central portion is sized from 2/3 to 3/4 of the inner loop ball topsheet.

Furthermore, the inner ring spherical top plate and the aluminum foil are provided with center holes, a layer of PMI film covers the center holes, and the shape of the PMI film is consistent with that of the inner ring spherical top plate.

Further, the PMI film is attached to the aluminum foil by glue.

Still further, the PMI film thickness is between 50 to 100 microns.

Still further, the central aperture is sized from 2/3 to 3/4 of the inner loop ball topsheet.

Further, the middle ring vibration reinforcing belt is provided with sun stripes.

The utility model adopts the above technical scheme, the beneficial effect who has is: through attached aluminium foil, sound membrane rigidity improves, can the spread width for earphone sound is fuller, and the tone quality is abundanter, and tone quality is better.

Drawings

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

Fig. 1 is a front view of a high-quality sound film of the present invention;

fig. 2 is a cross-sectional view taken in a diametrical direction of a high-quality sound membrane according to a first embodiment of the present invention;

fig. 3 is a cross-sectional view taken diametrically of a high-quality sound membrane according to a second embodiment of the present invention;

fig. 4 is a graph showing a comparison of the frequency response of the high-quality sound film of the first and second embodiments of the present invention and the conventional sound film.

Detailed Description

The present invention will now be further described with reference to the accompanying drawings and detailed description.

First embodiment

As shown in fig. 1 and 2, a high sound quality membrane includes an inner ring dome top sheet 1, a middle ring vibration reinforcement band 2, and an outer ring fixing band 3. Wherein, the middle ring vibration reinforcing belt 2 is provided with a sun stripe 21. The inner ring ball top plate 1, the middle ring vibration reinforcing band 2 and the outer ring fixing band 3 are all made of PET graphene composite materials, and a layer of aluminum foil 4 is attached to the upper surfaces of the inner ring ball top plate 1 and the middle ring vibration reinforcing band 2 close to the inner ring ball top plate 1. Specifically, the aluminum foil 4 is coated with glue, and then the aluminum foil 4 is attached to the upper surface of the inner panel dome top sheet 1 and the upper surface of the portion of the middle panel vibration reinforcement tape 2 adjacent to the inner panel dome top sheet 1 by thermocompression bonding. Preferably, the aluminum foil is between 10 and 50 microns thick. Through attached aluminium foil, sound membrane rigidity improves, can the spread width for earphone sound is fuller, and the tone quality is abundanter, and tone quality is better.

In order to reduce the weight of the sound diaphragm, the PET graphene composite material of the central portion of the top sheet 1 of the inner orb is dug away. This can further extend the bandwidth. Preferably, the size of the central portion is 2/3 to 3/4 of the inner loop ball topsheet 1.

Second embodiment

This embodiment is different from the first embodiment in that the aluminum foil of the central portion of the inner orbicular top sheet 1 is removed to form a central hole 11, and then a PMI film (polymethacrylimide) 5 is coated on the central hole 11, and the shape of the PMI film 5 is identical to the shape of the inner orbicular top sheet 1. By replacing part of the aluminum foil 4 with the PMI film 5, the bandwidth can be further extended.

The PMI film 5 may be attached to the aluminum foil 5 by glue. The PMI film 5 cannot be too thick or too thin, too thick giving high weight and too thin giving insufficient stiffness. Preferably, the PMI film thickness is between 50 to 100 microns.

Preferably, the central aperture 11 is sized from 2/3 to 3/4 of the inner loop ball topsheet 1.

Fig. 4 shows a frequency response comparison of the first embodiment, the second embodiment and the existing sound diaphragm. As can be seen from fig. 4, the bandwidth of the second embodiment and the bandwidth of the first embodiment are both greater than the bandwidth of the conventional sound film, and the second embodiment has the best effect.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The high-sound-quality sound film comprises an inner ring ball top plate, a middle ring vibration reinforcing band and an outer ring fixing band, and is characterized in that the inner ring ball top plate, the middle ring vibration reinforcing band and the outer ring fixing band are all made of a PET graphene composite material, and a layer of aluminum foil is attached to the upper surfaces of the inner ring ball top plate and the middle ring vibration reinforcing band portion close to the inner ring ball top plate.

2. The high quality sound film of claim 1, wherein the aluminum foil is between 10 and 50 microns thick.

3. The high-quality sound film according to claim 1, wherein said aluminum foil is adhered to said inner panel dome top sheet and an upper surface of said middle panel vibration-reinforcing band portion adjacent to said inner panel dome top sheet by means of glue.

4. The high quality sound film of claim 1, wherein the PET graphene composite material of the center portion of the inner ring bead top sheet is dug away.

5. The high quality sound film of claim 4, wherein the central portion is sized from 2/3 to 3/4 of the inner loop dome top sheet.

6. The high quality sound film according to claim 1, wherein said inner dome and aluminum foil have a center hole, said center hole being covered with a PMI film having a shape corresponding to the shape of said inner dome.

7. The high quality sound film according to claim 6, wherein said PMI film is attached to said aluminum foil by glue.

8. The high quality sound film according to claim 6, wherein said PMI film thickness is between 50 and 100 microns.

9. The high quality sound film of claim 6 wherein said central aperture is sized from 2/3 to 3/4 of said inner ring dome top piece.

10. The high-quality sound film as claimed in claim 1, wherein said middle ring vibration-reinforcing band is provided with solar stripes.