CN111031422A

CN111031422A - Portable bluetooth headset

Info

Publication number: CN111031422A
Application number: CN201911073878.7A
Authority: CN
Inventors: 赵烈毅
Original assignee: Shanghai Kungfor Health Technology Co ltd
Current assignee: Suzhou Gongqian Health Technology Co.,Ltd.
Priority date: 2019-11-06
Filing date: 2019-11-06
Publication date: 2020-04-17
Anticipated expiration: 2039-11-06
Also published as: CN111031422B

Abstract

The invention discloses a portable Bluetooth headset, which relates to the field of headset equipment and comprises a first half shell, wherein a sound outlet connecting pipe is arranged at the joint of the lower ends of the first half shell and a second half shell, a front sound guide hole and a low-pass filter are arranged in the sound outlet connecting pipe, the low-pass filter is positioned at the lower side of the front sound guide hole, a rear sound guide hole is arranged at the upper side of the front sound guide hole and is communicated with the front sound guide hole, a sound generating unit and a rear cavity are arranged at the joint of the first half shell and the second half shell, the lower end of the sound generating unit extends into the rear sound guide hole, the upper end of the sound generating unit extends into the rear cavity, a wire pipe is arranged at the right end of the second half shell, the left end of the wire pipe extends into the rear cavity, an earphone wire is arranged at the upper end of the sound generating unit, the other end. The invention reduces noise and burr feeling, improves the sound listening effect, reduces the sound wave loss and has good use effect.

Description

Portable bluetooth headset

Technical Field

The invention relates to the field of earphone equipment, in particular to a portable Bluetooth earphone.

Background

A single moving iron unit of an earphone is provided with a rear-end air inlet hole to increase air inflow, thereby effectively exerting low-frequency acoustic performance of the earphone. However, when the single-action iron unit produces sound, a small amount of sound waves are generated outwards from the rear-end air inlet hole, but because the existing earphone sealed cavity structure has no spare rear cavity space, the sound waves generated by the rear-end air inlet hole are reflected by the rear cavity cover to cause the sound waves emitted by the rear-end air inlet hole to return to the interior of the single-action iron unit and be compounded with the sound waves emitted by the unit vibrating diaphragm, so that normal sound production is interfered to a certain extent, and the actually generated low-frequency sound pressure is lower than the designed sound pressure.

In addition, the front cavity of the existing earphone uses a straight-through sound guide tube structure and is not subjected to acoustic treatment, so comb filtering effect (repeated standing waves are generated in a conduit) to a certain degree can be caused, the condition that medium-high frequency has obvious unpleasant feeling is caused, and the sound transmission is interfered. Moreover, most of sound guide tubes used by the existing earphones are plastic guide tubes, the inner walls of the sound guide tubes are relatively rough, and meanwhile, the materials of the sound guide tubes are flexible to a certain degree, so that sound waves can be offset and absorbed to a certain extent, unnecessary reverberation can be generated, the listening quality is reduced, and therefore the portable Bluetooth earphone with a good sound effect is provided to solve the problems.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a portable Bluetooth headset.

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

the utility model provides a portable Bluetooth headset, includes half first shell and half second shell, half first shell and half second shell assembly are the casing, half first shell and half second shell lower extreme junction are provided with out the sound connecting pipe, it is provided with preceding vocal hole and low pass filter in the sound connecting pipe, low pass filter is located preceding vocal hole downside, preceding vocal hole upside is provided with back vocal hole and with preceding vocal hole intercommunication, half first shell and half second shell combination department is provided with sound producing unit and back cavity, the sound producing unit lower extreme extends to in the back vocal hole, the sound producing unit upper end extends to in the back cavity, half second shell right-hand member is provided with the spool, the spool left end extends to in the back cavity, the sound producing unit upper end is provided with the earphone cord, the earphone cord other end extends to in the spool, half first shell and half second shell upper end are provided with back cavity lid, at least partial area of the back cavity cover is provided with an absorption and diffraction structure.

Preferably, the absorbing and diffracting structure is a rough texture structure.

Preferably, the sound generating unit is arranged in the sound generating unit accommodating cavity, the sound generating unit is provided with a rear end air inlet hole, the rear cavity is configured to provide a propagation space between the rear cavity cover and the rear end air inlet hole of the sound generating unit, and the periphery of the rear cavity outwards exceeds the sound generating unit accommodating cavity.

Preferably, the sound-emitting connecting pipe is an earplug part extending in the front-back direction, a cavity is arranged in the earplug part and is provided with a front sound guide hole extending in the front-back direction, and the cavity comprises a rear sound guide hole extending in the extending direction of the sound generating unit accommodating cavity and a front sound guide hole communicated with the rear sound guide hole in an inclined mode.

Preferably, the sound-emitting connecting pipe is made of high-density hard materials, and the rear sound-guiding hole, the front sound-guiding hole and the cavity are integrally formed during the molding of the sound-emitting connecting pipe, the first half shell and the second half shell.

Preferably, the hole walls of the front sound-guiding hole and the rear sound-guiding hole are formed of anti-sagging resin.

Preferably, the length of the cavity, the front sound leading hole and the rear sound leading hole is 1/4 of the length of 1KHz wavelength in the free sound field.

The invention has the beneficial effects that: according to the earphone cavity structure, the rear cavity is arranged at the rear end of the containing cavity of the sound generating unit, the absorption and diffraction structure is arranged on at least part of the rear cavity cover, and the absorption and diffraction structure can absorb part of sound waves generated outwards by the rear end air inlet hole of the sound generating unit and diffract the part of sound waves which are not absorbed to the rear cavity, so that the sound waves emitted by the rear end air inlet hole of the sound generating unit can not return to the interior of the sound generating unit when the sound generating unit is used for air intake, and the interference on the sound generation of the vibrating diaphragm is avoided. In addition, the sound guide hole and the cavity are formed when the shell made of high-density hard materials is molded, so that the sound guide hole and the cavity are basically not deformed by external force, and the influence on sound wave propagation caused by the deformation is avoided; and because the hole wall of the sound guide hole is formed with the anti-sagging resin, the hole wall of the sound guide hole has the smoothness of a mirror surface level, the loss in the sound wave transmission process is effectively reduced, and the generation of harmful harmonics is reduced to a great extent, so that the influence on sound transmission is greatly reduced, and the listening quality is ensured. In addition, the earphone of the invention can effectively reduce the burr sense of medium and high frequency by arranging the low-pass filter in the sound guide hole, thereby further improving the listening quality.

The invention reduces noise and burr feeling, improves the sound listening effect, reduces the sound wave loss and has good use effect.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a front view of the present invention.

Fig. 3 is a graph of the frequency response of a headphone employing a rear cavity cover having a smooth texture.

Fig. 4 is a graph of the frequency response of a headphone employing a rear cavity cover having a rough texture.

Reference numbers in the figures: the sound-emitting device comprises a rear cavity cover 1, an absorption and diffraction structure 2, a wire tube 3, a rear end air inlet hole 4, a headphone wire 5, a sound-emitting unit accommodating cavity 6, a sound-emitting unit 7, a rear sound-emitting hole 8, a front sound-emitting hole 9, a low-pass filter 10, a first half shell 11, a rear cavity 12, a sound-emitting connecting pipe 13 and a second half shell 14.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-4, a portable bluetooth headset comprises a first half shell 11 and a second half shell 14, the first half shell 11 and the second half shell 14 are assembled into a shell, a sound outlet connecting pipe 13 is arranged at the joint of the lower ends of the first half shell 11 and the second half shell 14, a front sound guide hole 9 and a low pass filter 10 are arranged in the sound outlet connecting pipe 13, the low pass filter 10 is positioned at the lower side of the front sound guide hole 9, a rear sound guide hole 8 is arranged at the upper side of the front sound guide hole 9 and is communicated with the front sound guide hole 9, a sound generating unit 7 and a rear chamber 12 are arranged at the joint of the first half shell 11 and the second half shell 14, the lower end of the sound generating unit 7 extends into the rear sound guide hole 8, the upper end of the sound generating unit 7 extends into the rear chamber 12, a conduit 3 is arranged at the right end of the second half shell 14, the left end of the conduit 3 extends into the rear chamber 12, the upper ends of the first half-shell 11 and the second half-shell 14 are provided with a rear cavity cover 1, and at least partial areas of the rear cavity cover 1 are provided with absorption and diffraction structures 2.

The absorption and diffraction structure 2 is a rough texture structure, and can realize absorption and diffraction functions.

Sound generating unit 7 locates sound generating unit holding chamber 6, and sound generating unit 7 is equipped with rear end inlet port 4, and back cavity 12 is configured to provide the propagation space between back cavity lid 1 and sound generating unit 7's rear end inlet port 4, and the periphery of back cavity 12 outwards surpasss sound generating unit holding chamber 6, can provide sufficient sound wave diffraction space, has further reduced the influence to normal sound production.

The sound-emitting connecting pipe 13 is an earplug part extending in the front-back direction, a cavity is arranged in the earplug part, a front sound guide hole 9 extending in the front-back direction is arranged, the cavity comprises a rear sound guide hole 8 extending in the extending direction of the sound-emitting unit accommodating cavity 6 and a front sound guide hole 9 obliquely communicated with the rear sound guide hole 8, and therefore the influence on the sound production of the vibrating diaphragm caused by the fact that sound waves return to the inside of the sound-emitting unit 7 can be further avoided.

The sound outlet connecting pipe 13 is made of high-density hard materials, and the rear sound outlet hole 8, the front sound outlet hole 9 and the cavity are integrally formed when the sound outlet connecting pipe 13, the first half shell 11 and the second half shell 14 are molded, so that the rear sound outlet hole 8, the front sound outlet hole 9 and the cavity are not deformed by external force, and the influence on sound wave propagation caused by the external force is avoided.

The hole walls of the front sound guide hole 9 and the rear sound guide hole 8 are made of anti-sagging resin, so that the hole walls of the front sound guide hole 9 and the rear sound guide hole 8 have smoothness of a mirror surface level, and loss in a sound wave transmission process is effectively reduced.

The length of the cavity, the front sound guide hole 9 and the rear sound guide hole 8 is 1/4 of the length of 1KHz wavelength in a free sound field, and the design conforms to the acoustic principle and generates effective resonance.

The working principle is as follows: when the device is used, the rear cavity 12 is arranged at the rear end of the sound generating unit accommodating cavity 6, the absorption and diffraction structure 2 is arranged on at least part of the rear cavity cover 1, and the absorption and diffraction structure 2 can absorb part of sound waves generated outwards by the rear end air inlet hole 4 of the sound generating unit 7 and diffract the part of sound waves which are not absorbed to the rear cavity 12, so that the sound waves emitted by the rear end air inlet hole 4 of the sound generating unit 7 basically cannot return to the inside of the sound generating unit 7 when the sound generating unit 7 is used for air intake, and the interference on sound generation of a vibrating diaphragm is avoided. In addition, the front sound guide hole 9, the rear sound guide hole 8 and the cavity are formed by molding the first half shell 11 and the second half shell 14 which are made of high-density hard materials, so that the sound guide structure is basically not deformed by external force, and the influence on sound wave transmission caused by the deformation is avoided; and because the hole walls of the front sound guide hole 9 and the rear sound guide hole 8 are formed with the anti-sagging resin, the hole walls of the front sound guide hole 9 and the rear sound guide hole 8 have smoothness of mirror surface level, so that the loss in the sound wave transmission process is effectively reduced, and the generation of harmful harmonics is reduced to a great extent, thereby greatly reducing the influence on sound transmission and ensuring the listening quality. In addition, the low-pass filter 10 is arranged in the cavity, so that medium-high frequency burr feeling can be effectively reduced, the listening quality is further improved, the noise burr feeling is reduced, the listening effect is improved, the sound wave loss is reduced, and the using effect is good.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a portable bluetooth headset, includes half first shell (11) and half second shell (14), its characterized in that, half first shell (11) and half second shell (14) assembly are the casing, half first shell (11) and half second shell (14) lower extreme junction are provided with out sound connecting pipe (13), it is provided with preceding sound hole (9) and low pass filter (10) to go out sound connecting pipe (13), low pass filter (10) are located preceding sound hole (9) downside, preceding sound hole (9) upside is provided with back sound hole (8) and with preceding sound hole (9) intercommunication, half first shell (11) and half second shell (14) junction are provided with sound producing unit (7) and back cavity (12), sound producing unit (7) lower extreme extends to in back sound hole (8), sound producing unit (7) upper end extends to in back cavity (12), half shell (14) right-hand member of second is provided with spool (3), spool (3) left end extends to rear chamber (12) in, sound generating unit (7) upper end is provided with earphone cord (5), earphone cord (5) other end extends to in spool (3), half shell (11) of first and second are half shell (14) upper end and are provided with rear cavity lid (1), rear cavity lid (1) have at least partial region to have absorption and diffraction structure (2).

2. A portable bluetooth headset according to claim 1, characterized in that the absorbing and diffracting structure (2) is a rough texture.

3. A portable bluetooth headset according to claim 1, characterized in that the sound unit (7) is arranged in the sound unit receiving cavity (6), the sound unit (7) is provided with a rear air inlet (4), the rear chamber (12) is configured to provide a propagation space between the rear cover (1) and the rear air inlet (4) of the sound unit (7), and the outer circumference of the rear chamber (12) extends outwards beyond the sound unit receiving cavity (6).

4. The portable bluetooth headset as claimed in claim 1, wherein the sound outlet connection tube (13) is an earplug portion extending in a front-back direction, a cavity is formed in the earplug portion and a front sound guide hole (9) extending in the front-back direction is formed in the earplug portion, and the cavity includes a rear sound guide hole (8) extending in an extending direction of the sound generating unit accommodating chamber (6) and the front sound guide hole (9) obliquely communicating with the rear sound guide hole (8).

5. The portable bluetooth headset of claim 1, wherein the sound outlet connection tube (13) is made of a high-density hard material, and the rear sound guide hole (8), the front sound guide hole (9) and the cavity are integrally formed when the sound outlet connection tube (13), the first half shell (11) and the second half shell (14) are molded.

6. A portable bluetooth headset according to claim 1, characterized in that the walls of the front sound-guiding hole (9) and the rear sound-guiding hole (8) are formed of anti-sagging resin.

7. A portable bluetooth headset according to claim 1, characterized in that the length of the cavity, the front sound-guiding hole (9) and the rear sound-guiding hole (8) is 1/4 of the length of 1KHz wavelength in the free sound field.