CN212992583U

CN212992583U - Vacuum passive noise insulation earphone

Info

Publication number: CN212992583U
Application number: CN202022010207.0U
Authority: CN
Inventors: 曹振雷; 马翼平; 韦靖宇
Original assignee: Avic East China Photoelectric Shanghai Co ltd
Current assignee: Avic East China Photoelectric Shanghai Co ltd
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2021-04-16
Anticipated expiration: 2030-09-15

Abstract

The utility model discloses a passive earphone that makes an uproar that separates in vacuum, earphone portion includes by outer shell body, interior casing, division board and earmuff that sets gradually to interior, form the ante-chamber that is used for holding the ear between earmuff and the division board, form the back chamber that is used for holding earphone electronic component between division board and the interior casing, form the vacuum chamber between interior casing and the shell body, the ante-chamber is partly covered to the back chamber, the back chamber is partly covered to the vacuum chamber, the vacuum of vacuum chamber is 0.005Pa, the wall thickness of shell body and/or interior casing is 3-4 mm. The utility model discloses an outer shell body and interior casing form the vacuum cavity, have surrounded the most radio reception radiation area of earphone, isolated most outside sound, kept out the invasion of external noise effectively, improve the passive noise insulation effect of making an uproar earphone to through the optimization setting to outer shell body and interior casing wall thickness and material, realized weight and structural strength's balance, ensure the reliability that the earphone used.

Description

Vacuum passive noise insulation earphone

Technical Field

The utility model relates to an earphone technical field of making an uproar falls especially relates to a vacuum is earphone of making an uproar passively separated.

Background

In the field of military aviation, strong noise is always a difficult problem which puzzles the military. Through a large number of tests, the noise of active helicopters, fighters, bombers, transporters and other machines during takeoff reaches 120-140 dB, far exceeds the tolerable level of people, and seriously harms the hearing and physical and psychological health of ground service workers. From the medical point of view, when a person is in a noise environment of more than 95dB, the functions of heart and kidney begin to be damaged, and symptoms such as insomnia, tinnitus, dreaminess, fatigue, hypodynamia, memory decline and the like can be caused; when the ambient noise reaches 115dB, the hearing function is irreparably impaired. Through investigation, the performance of the passive noise insulation earphones used by current ground service workers is uneven, and the noise reduction effect is only about 15-20 dB generally. Old-fashioned passive noise reduction earphone often adopts the mode of thickening ear muff, filling sponge to strengthen the physics and makes an uproar the performance of making an uproar, but still transmits the characteristic based on sound in the solid, hardly completely cuts off external noise effectively. Therefore, in view of the above problems, it is necessary to propose a further solution to solve the problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a passive earphone of making an uproar that separates in vacuum to overcome the not enough that exists among the prior art.

In order to solve the technical problem, the technical scheme of the utility model is that:

the utility model provides a vacuum earphone of making an uproar that separates passively, includes bow portion, and establishes separately two earphone portions at bow portion both ends, two earphone portions do not are used for the cover to establish on left and right ear, earphone portion includes shell body, interior casing, division board and earmuff by outer shell body, interior casing, division board and the earmuff that sets gradually in to, the earmuff with form the ante-chamber that is used for holding the ear between the division board, the division board with form the back chamber that is used for holding earphone electronic component between the interior casing, interior casing with form the vacuum cavity between the shell body, the half cladding of back chamber the ante-chamber, the vacuum cavity is half cladding the back chamber, the vacuum degree of vacuum cavity is 0.005Pa, the shell body and/or the wall thickness of interior casing is 3-4 mm.

In a preferred embodiment of the invention, the wall thickness of the outer shell and/or the inner shell is 3.5-4 mm.

In a preferred embodiment of the present invention, the outer housing and the inner housing are integrally injection molded.

In a preferred embodiment of the present invention, the material of the outer housing and the inner housing is a mixture of 80% ABS plastic and 20% PC plastic.

In a preferred embodiment of the present invention, the cross-section of the vacuum chamber is crescent-shaped.

In a preferred embodiment of the present invention, the earcap comprises a surface layer and a filling layer disposed in the surface layer, the surface layer is made of egg white or dermis, and the filling layer is made of inert sponge or silica gel.

In a preferred embodiment of the present invention, a plurality of through holes are uniformly formed on the partition plate.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses an outer shell body and interior casing form the vacuum cavity, the most radio reception radiation area of earphone has been enclosed, isolated most outside sound, the invasion of external noise has been kept out effectively, improve the noise insulation effect of the earphone of making an uproar passively, the passive index of making an uproar exceeds 30dB (1/1oct, 50 ~ 8000Hz), the noise reduction effect is than the conventional earphone of making an uproar more than 10dB, and through the optimization setting of outer casing and interior casing wall thickness and material, weight.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic sectional structure view of an earphone part of the present invention;

fig. 2 is a schematic cross-sectional view of an earphone portion according to another embodiment of the present invention.

Specifically, 10, an outer shell; 20. an inner housing; 30. a partition plate; 40. ear cap; 100. a front cavity; 200. a rear cavity; 300. a vacuum chamber.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the scope of the invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, unless otherwise specified, "a plurality" means two or more.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

As shown in fig. 1, a vacuum passive noise isolation earphone comprises a head bow part and two earphone parts respectively arranged at two ends of the head bow part, wherein the two earphone parts are respectively sleeved on a left ear and a right ear to realize the stability and tightness of the head.

Specifically, the earphone unit includes an outer case 10, an inner case 20, a partition plate 30, and an ear cap 40, which are sequentially disposed from the outside to the inside. The ear loops 40 and the divider plate 30 form therebetween a front cavity 100 for receiving an ear. A back volume 200 for housing the headset electronics, such as the microphone and other active circuit modules, is formed between the divider 30 and the inner housing 20. A vacuum chamber 300 is formed between the inner case 20 and the outer case 10 to insulate most of external sounds, thereby enhancing a noise insulation effect. The rear cavity 200 is half-wrapped on the front cavity 100, and the vacuum cavity 300 is half-wrapped on the rear cavity 200, so that most of the sound receiving radiation area surrounding the earphone is realized, and the invasion of external noise is effectively resisted. Preferably, the vacuum degree of the vacuum chamber 300 is 0.005 Pa. Since the outer case 10 and the inner case 20 of the earphone part will be subjected to a large pressure due to the vacuum chamber 300, the outer case 10 and the inner case 20 need to be optimally disposed in order to ensure the reliability of the use of the earphone. Specifically, in terms of structure, the wall thickness of either or both of the outer shell 10, the inner shell 20, or both, is 3-4 mm. Further, the wall thickness of the outer shell 10 and/or the inner shell 20 is 3.5-4 mm. Preferably, the wall thickness of the outer shell 10 and the wall thickness of the inner shell 20 are both 3.5-4 mm. The cross-sections of the outer case 10 and the inner case 20 are preferably approximately racetrack type to obtain excellent structural support. The outer housing 10 and the inner housing 20 are preferably integrally injection molded. In terms of material, the outer housing 10 and the inner housing 20 are made of a mixture of 80% ABS plastic and 20% PC plastic to ensure structural strength and process meltability, so as to achieve close attachment of the outer housing 10 and the inner housing 20, and form the vacuum chamber 300. The ABS plastic is a terpolymer of three monomers of acrylonitrile (A), butadiene (B) and styrene (S). PC plastic refers to polycarbonate, and is a high molecular polymer containing carbonate groups in the molecular chain.

As shown in fig. 2, the cross-section of the vacuum chamber 300 is preferably crescent-shaped to form a preferable noise insulation space.

The ear loops 40 include a skin layer and a filling layer disposed within the skin layer. The epidermis layer is made of protein skin or dermis to improve the use comfort. The material of filling layer is inertia sponge or silica gel to further improve the earphone and separate the effect of making an uproar.

The partition plate 30 is uniformly provided with a plurality of through holes to realize good answering of the telephone receiver in the rear cavity 200 and to ensure that electronic components in the rear cavity 200 are radiated to a certain extent.

To sum up, the utility model discloses an outer shell body and interior casing formation vacuum cavity, the most radio reception radiation area of earphone has been enclosed, isolated most outside sound, the invasion of external noise has been kept out effectively, improve the noise insulation effect of passive noise insulation earphone, the passive index of making an uproar exceeds 30dB (1/1oct, 50 ~ 8000Hz), noise reduction effect is more than the conventional earphone of making an uproar passively, and through the optimization setting to outer shell body and interior casing wall thickness and material, weight and structural.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a vacuum earphone of making an uproar that separates passively, includes bow portion, and establishes separately two earphone portions at bow portion both ends, two earphone portions do not are used for the cover to establish on left and right ear, its characterized in that, earphone portion includes shell body, interior casing, division board and earmuff by outer shell body, interior casing, division board and the earmuff that sets gradually in to, the earmuff with form the ante chamber that is used for holding the ear between the division board, the division board with form the back chamber that is used for holding earphone electronic component between the interior casing, interior casing with form the vacuum chamber between the shell body, the half cladding in back chamber the ante chamber, the vacuum chamber is half cladding in the back chamber, the vacuum degree of vacuum chamber is 0.005Pa, the shell body and/or the wall thickness of interior casing is 3-4 mm.

2. The vacuum passive noise-insulating earphone according to claim 1, wherein the wall thickness of the outer housing and/or the inner housing is 3.5-4 mm.

3. The vacuum passive noise-insulating earphone according to claim 1, wherein the outer housing and the inner housing are integrally injection-molded.

4. The vacuum passive noise-insulation earphone according to claim 1, wherein the cross-section of the vacuum chamber is crescent-shaped.

5. The vacuum passive noise insulation earphone according to claim 1, wherein the earmuff comprises an epidermis layer and a filling layer arranged in the epidermis layer, the epidermis layer is made of egg white or dermis, and the filling layer is made of inert sponge or silica gel.

6. The vacuum passive noise insulation earphone according to claim 1, wherein the partition plate is uniformly provided with a plurality of through holes.