CN215871775U

CN215871775U - Front cavity module acoustic system of earphone speaker

Info

Publication number: CN215871775U
Application number: CN202121358723.0U
Authority: CN
Inventors: 沈庆凯; 戴文杰; 杨冉
Original assignee: Risuntek Inc
Current assignee: Risuntek Inc
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2022-02-18
Anticipated expiration: 2031-06-18

Abstract

The utility model discloses an acoustic system of a front cavity module of an earphone loudspeaker, which comprises an earphone front shell, the loudspeaker and a double-sided adhesive-backed EVA pad, wherein: the front end of the front shell of the earphone is provided with a sound outlet mouth, the inner side of the front shell of the earphone is provided with a mounting cavity for assembling a horn, and the front end in the mounting cavity is provided with an assembling position at the rear side of the sound outlet mouth; the front end of the horn is provided with a horn protective cover, and the front end surface of the horn protective cover is of a plane mesopore structure; the loudspeaker is arranged in the mounting cavity, and the double-sided adhesive-backed EVA pad is adhesively fixed between the front end face and the assembly position of the loudspeaker protective cover; the double-sided adhesive-backed EVA pad is annular, and the inner hole of the double-sided adhesive-backed EVA pad is avoided from the area where the middle hole of the front end face of the loudspeaker protection cover is located; and the loudspeaker rear end sets up sealed glue, has solved the sealed gas leakage of earphone loudspeaker front cavity module, avoids appearing the low frequency curve poor, loudspeaker front cavity sound capacity, high frequency curve uniformity scheduling problem, has improved the uniformity of curve, satisfies the requirement of high-end product left and right ear equilibrium degree more easily.

Description

Front cavity module acoustic system of earphone speaker

Technical Field

The utility model relates to the technical field of assembly design of a front cavity module of an earphone loudspeaker, in particular to an acoustic system of the front cavity module of the earphone loudspeaker.

Background

At present, with the rapid development of the earphone industry, the requirement of consumers on the sound quality of earphones is higher and higher, the requirement on the balance degree of left and right ears is stricter and tighter, and the balance degree of a frequency point (1 kHz) is controlled from the previous control, so that the balance degree control of a frequency range is developed. Therefore, the requirement on the frequency response consistency of the earphone is higher and higher, and the traditional manufacturing process of gluing, sealing and fixing the earphone horn module is adopted, so that a plurality of bad phenomena (low-frequency and high-frequency changes are remarkably) of abnormal horn frequency response changes are easily generated.

Therefore, a new technical solution is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to the defects in the prior art, and a primary object of the present invention is to provide an acoustic system for a front cavity module of an earphone speaker, which solves the problems of poor low-frequency curve, inconsistent sound capacity of the front cavity of the speaker, inconsistent high-frequency curve, etc. due to the air leakage of the front cavity module of the earphone speaker.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a cavity module acoustic system before earphone loudspeaker, shell, loudspeaker and two-sided gum EVA pad before earphone, wherein:

the front end of the earphone front shell is provided with a sound outlet mouth, the inner side of the earphone front shell is provided with a mounting cavity for assembling a loudspeaker, and the front end in the mounting cavity is provided with an assembling position which is positioned at the rear side of the sound outlet mouth;

the front end of the horn is provided with a horn protective cover, and the front end surface of the horn protective cover is of a plane mesopore structure;

the loudspeaker is arranged in the mounting cavity, and the double-sided adhesive-backed EVA pad is adhesively fixed between the front end face and the assembly position of the loudspeaker protective cover; the double-sided adhesive-backed EVA pad is annular, and the inner hole of the double-sided adhesive-backed EVA pad is avoided from the area of the middle hole on the front end face of the loudspeaker protection cover;

and, the loudspeaker rear end sets up sealed glue, sealed glue covers fixedly the rear end of loudspeaker visor makes: the rear end of the loudspeaker protective cover is completely buried in the sealant, and the front shell of the earphone is connected with the loudspeaker protective cover in a sealing manner.

As a preferred embodiment: the front-side back glue of the double-sided back glue EVA pad is bonded to the assembly position, and the rear-side back glue of the double-sided back glue EVA pad is bonded to the front end face of the loudspeaker protective cover.

As a preferred embodiment: the unilateral distance of the mesopore internal diameter of the preceding terminal surface of loudspeaker visor is more than 1.5mm apart from the external diameter, the thickness that two-sided gum EVA filled up is below 0.6mm, and the unilateral gum width of the internal diameter of hole apart from the external diameter that two-sided gum EVA filled up is more than 0.8 mm.

As a preferred embodiment: the sealant is UV sealant.

Compared with the prior art, the utility model has obvious advantages and beneficial effects, and particularly, according to the technical scheme, the double-sided adhesive-backed EVA pad is bonded and fixed between the front end of the earphone front shell and/or the front end of the loudspeaker protection cover, so that the problems of poor low-frequency curve, inconsistent sound capacity of the loudspeaker front cavity, inconsistent high-frequency curve and the like due to the sealing air leakage of the earphone loudspeaker front cavity module are solved, the curve consistency is improved, and the requirement on the balance degree of the left ear and the right ear of a high-end product is more easily met; meanwhile, the space between the rear end of the loudspeaker and the front shell of the earphone is shaped, solidified and reinforced through sealant, the sealing stability is further improved, and the yield is high;

secondly, the sealant adopts UV sealant, so that the drying time of the traditional glue is saved, the UV sealant is quickly shaped and cured, advanced processing is not needed, the working hours in the operation process are greatly reduced, the operation efficiency is improved, and the production cost is also reduced.

To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Drawings

FIG. 1 is a cross-sectional view of an embodiment of the present invention;

FIG. 2 is a front view of the horn of the present invention;

FIG. 3 is a left side view of the horn of the present invention;

fig. 4 is a top view of a speaker according to an embodiment of the present invention.

The attached drawings indicate the following:

10. earphone front shell 11, sound outlet mouth

12. Mounting cavity 13 and mounting position

14. Sealant 30 and double-sided adhesive-backed EVA pad

20. Horn 21 and protective cover thereof

211. And (4) mesopores.

Detailed Description

Referring to fig. 1 to 4, specific structures of the embodiments of the present invention are shown.

The utility model provides a preceding chamber module acoustic system of earphone loudspeaker, shell 10, loudspeaker 20 and two-sided gum EVA pad 30 before the earphone, wherein:

the front end of the earphone front shell 10 is provided with a sound outlet 11, the inner side of the earphone front shell 10 is provided with a mounting cavity 12 for mounting a horn, and the front end in the mounting cavity 12 is provided with a mounting position 13 positioned at the rear side of the sound outlet 11;

the front end of the horn 20 is provided with a horn protection cover 21, and the front end surface of the horn protection cover 21 is of a plane central hole 211 structure;

the double-sided adhesive-backed EVA pad 30 is annular, and the aperture of an inner hole of the double-sided adhesive-backed EVA pad is larger than or equal to the inner diameter of a middle hole 211 of the front end face of the loudspeaker protection cover 21 so as to avoid the area where the middle hole 211 is located;

loudspeaker 20 installs in installation cavity 12, two-sided gum EVA pad 30 adhesive fixation is between preceding terminal surface, the assembly position 13 of loudspeaker visor 21, specifically indicates: the front side gum that two-sided gum EVA filled up 30 bonds in assembly position 13, and the rear side gum that two-sided gum EVA filled up 30 bonds in loudspeaker visor 21's preceding terminal surface, so, loudspeaker visor 21 and the bonding of preceding shell 10 through two-sided gum EVA pad 30 of earphone play effectual sealed effect, the sealed low frequency curve that leaks gas and lead to of earphone loudspeaker front chamber module is bad, the preceding chamber sound tolerance uniformity of loudspeaker, the problem of high frequency curve uniformity has been stopped.

During assembly, the double-sided back EVA pad 30 can be attached to the assembly position 13 of the front earphone shell 10, and then the speaker 20 is installed, so that the front end face of the speaker protection cover 21 of the speaker 20 is bonded and fixed to the rear side of the double-sided back EVA pad 30; the double-sided adhesive-backed EVA pad 30 may be attached to the front end surface of the speaker protection cover 21, so that the front-side adhesive of the double-sided adhesive-backed EVA pad 30 is bonded and fixed to the assembly position 13 of the front earphone housing 10 when the speaker 20 is installed.

In this embodiment, the unilateral distance from the inner diameter to the outer diameter of the middle hole 211 of the front end surface of the horn protection cover 21 is more than 1.5mm, so as to ensure that a sufficient bonding plane is reserved; the thickness of two-sided gum EVA pad is below 0.6mm, and the unilateral gum width of the hole internal diameter of two-sided gum EVA pad apart from the external diameter is more than 0.8mm to make the sealed relation between shell 10 and the loudspeaker visor 21 before the earphone remain stable, thereby play effectual sealed effect.

In actual manufacturing, after the speaker 20 is installed in the front earphone shell 10, the rear end of the speaker 20 is coated with a sealant 14 (e.g., UV sealant) for rapid setting, curing and reinforcement. The sealant 14 covers and fixes the rear end of the horn protection cover 21, so that: the rear end of the loudspeaker protective cover 21 is completely buried in the sealant 14, so that the good sealing performance of the earphone front shell 10 and the loudspeaker protective cover 21 is ensured, the EVA pad is ensured to be tightly fixed between the earphone front shell 10 and the loudspeaker protective cover 21 through the double-sided back adhesive, and the EVA pad is prevented from shifting and falling off. Like this, fill up 30 sealed fixed through two-sided gum EVA between the front end of loudspeaker 20 and the earphone front shell 10, just, set up solidification through UV glue fast between the rear end of loudspeaker 20 and the earphone front shell 10 and consolidate, sealed steadiness is good, and easily the equipment, and the equipment man-hour is short, efficient, the yield is high.

The design of the utility model is characterized in that the double-sided adhesive-backed EVA pad is mainly bonded and fixed between the front end of the earphone front shell and/or the front end of the loudspeaker protective cover, so that the problems of poor low-frequency curve, inconsistent sound capacity of the loudspeaker front cavity, inconsistent high-frequency curve and the like of the earphone loudspeaker front cavity module are solved, the consistency of the curve is improved, and the requirement on the balance degree of the left ear and the right ear of a high-end product is more easily met; meanwhile, the space between the rear end of the loudspeaker and the front shell of the earphone is shaped, solidified and reinforced through sealant, the sealing stability is further improved, and the yield is high;

Claims

1. The utility model provides an earphone loudspeaker front cavity module acoustic system which characterized in that: shell, loudspeaker and two-sided gum EVA pad before earphone, wherein:

2. The earpiece speaker front cavity module acoustic system of claim 1, wherein: the front-side back glue of the double-sided back glue EVA pad is bonded to the assembly position, and the rear-side back glue of the double-sided back glue EVA pad is bonded to the front end face of the loudspeaker protective cover.

3. The earpiece speaker front cavity module acoustic system of claim 1, wherein: the unilateral distance of the mesopore internal diameter of the preceding terminal surface of loudspeaker visor is more than 1.5mm apart from the external diameter, the thickness that two-sided gum EVA filled up is below 0.6mm, and the unilateral gum width of the internal diameter of hole apart from the external diameter that two-sided gum EVA filled up is more than 0.8 mm.

4. The earpiece speaker front cavity module acoustic system of claim 1, wherein: the sealant is UV sealant.