CN214627307U

CN214627307U - Active noise reduction Bluetooth headset

Info

Publication number: CN214627307U
Application number: CN202120264493.5U
Authority: CN
Inventors: 米鑫杰
Original assignee: Guangzhou Fengku Technology Co ltd
Current assignee: Guangzhou Fengku Technology Co ltd
Priority date: 2021-01-30
Filing date: 2021-01-30
Publication date: 2021-11-05
Anticipated expiration: 2031-01-30

Abstract

The utility model provides an active noise reduction Bluetooth headset, which comprises a headset shell, a power supply, a loudspeaker, a control circuit board, a first microphone and a second microphone, wherein a first cavity for accommodating the loudspeaker and the power supply and a second cavity for fixing the control circuit board are arranged in the headset shell; the control circuit board comprises an ANC noise reduction unit, the first microphone comprises a pickup unit, a filtering unit and a coupling unit, the pickup unit is connected with the filtering unit through a circuit, the filtering unit is connected with the coupling unit through a circuit, and the coupling unit is connected with the ANC noise reduction unit through a circuit; the sound pickup unit filters high-frequency noise of picked sound through the filtering unit and then is coupled to the ANC noise reduction unit through the coupling unit, and the ANC noise reduction unit controls the loudspeaker to emit sound waves with opposite phases and same amplitude with the audio frequency according to the audio frequency processed by the first microphone so as to play a role in noise reduction. The utility model discloses can fall the noise to ambient noise effectively.

Description

Active noise reduction Bluetooth headset

Technical Field

The utility model relates to a bluetooth headset technical field, concretely relates to bluetooth headset of making an uproar falls in initiative.

Background

The existing Bluetooth headset is easily interfered by external environment noise when listening to contents in a noisy environment, not only the output tone quality is poor, but also great noise can appear, and the listening feeling and experience of a user are seriously influenced.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model provides an initiative bluetooth headset of making an uproar falls can fall the noise of making an uproar to ambient noise effectively.

In order to achieve the above object, the present invention provides an active noise reduction bluetooth headset, which includes a headset housing, a power supply, a speaker, a control circuit board, a first microphone for picking up environmental low-frequency noise and a second microphone for picking up speaker voice, wherein the first microphone, the second microphone, the speaker and the power supply are respectively connected to the control circuit board through a circuit; the earphone shell is internally provided with a first cavity for accommodating a loudspeaker and a power supply and a second cavity for fixing a control circuit board, the power supply and the loudspeaker are sequentially fixed in the first cavity, and the control circuit board is arranged in the second cavity and penetrates into a handheld part of the earphone shell; the control circuit board comprises an ANC noise reduction unit, the first microphone comprises a pickup unit, a filtering unit and a coupling unit, the pickup unit is connected with the filtering unit through a circuit, the filtering unit is connected with the coupling unit through a circuit, and the coupling unit is connected with the ANC noise reduction unit through a circuit; the sound pickup unit filters high-frequency noise of picked sound through the filtering unit and then is coupled to the ANC noise reduction unit through the coupling unit, and the ANC noise reduction unit controls the loudspeaker to emit sound waves with opposite phases and same amplitude with the audio frequency according to the audio frequency processed by the first microphone so as to play a role in noise reduction.

Further, the earphone shell comprises a front shell, a middle shell and a rear cover, the first cavity is formed between the front shell and the middle shell, and the second cavity is formed between the middle shell and the rear cover; the first microphone is located inside the rear cover, and the second microphone is located at the lower end of the hand-held portion.

Furthermore, a first fixing support for fixing the first microphone is arranged on the inner side of the rear cover, and a second fixing support for fixing the second microphone is arranged in the handheld part; the rear cover is provided with a first sound pickup hole communicated with the first microphone, and the middle shell is provided with a second sound pickup hole communicated with the second microphone.

Furthermore, a silicon microphone sleeve is wrapped outside the first microphone and the second microphone respectively.

Further, microphone sound insulation nets are respectively arranged between the silicon microphone sleeve and the first sound pickup hole and between the silicon microphone sleeve and the second sound pickup hole.

Further, an aluminum foil paper used for playing a touch induction role is further arranged between the control circuit board and the rear cover, and the aluminum foil paper is in circuit connection with the control circuit board.

Further, the sound outlet device also comprises a sound outlet mouth, and the sound outlet mouth is connected with the front end of the front shell; a convex ring used for limiting the loudspeaker is arranged in the front shell and positioned in front of the sound outlet mouth, and the loudspeaker is fixed in the convex ring; a sealed front sound cavity is formed between the horn and the sound outlet nozzle, and the front sound cavity is communicated with the sound outlet nozzle.

Further, the curve transition from the left side of the front shell to the right side of the front shell enables the shape of the front shell to form a conical shape with the tail end biased to one side of the front shell; the sound outlet nozzle is connected to the conical tail end of the front shell.

Furthermore, the front sound cavity is provided with a sound adjusting hole.

Furthermore, the sound outlet nozzle is positioned at one end of the front sound cavity and forms an included angle larger than 100 degrees with the loudspeaker.

Compared with the prior art, the utility model has the advantages of it is following: the utility model discloses contain the first microphone that is used for picking up environment low frequency noise and the second microphone that is used for picking up speaker sound among the bluetooth headset of making an uproar falls in the initiative, contain ANC noise reduction unit among the control circuit board, including pickup unit in the first microphone, filtering unit and coupling unit, pickup unit picks up after the external environment noise, high frequency noise in the environment noise that will pick up through filtering unit strains the back, only remain low frequency noise, then pass through coupling unit coupling to ANC noise reduction unit with low frequency noise in, ANC noise reduction unit carries out real-time operation to received low frequency noise, then launch the opposite phase according to operation result real-time control loudspeaker, the sound wave that the amplitude is the same offsets with environment low frequency noise, thereby effectively fall the noise to environment noise.

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 of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic structural view of the active noise reduction bluetooth headset of the present invention;

fig. 2 is an exploded view of one view angle of the active noise reduction bluetooth headset of the present invention;

fig. 3 is an exploded view of the active noise reduction bluetooth headset according to another view angle of the present invention;

fig. 4 is a schematic view of a cross-sectional structure of the active noise reduction bluetooth headset of the present invention;

FIG. 5 is a schematic cross-sectional view of the front housing;

fig. 6 is a block diagram of a control circuit structure of the active noise reduction bluetooth headset of the present invention;

fig. 7 is a circuit configuration diagram of the first microphone.

The attached drawings are as follows: 1, earphone shell; 101 a front shell; 1011 a first cavity; 1012 convex rings; 10121 boss; 1013 front sound chamber; 1014 sound adjusting hole; 102 a middle shell; 1021 a second cavity; 1022 a second fixed bracket; 1023 a second pick-up hole; 103 a rear cover; 1031 a first fixing support; 1032 a first pick-up hole; 104 a hand-held part; 2, a power supply; 3, a loudspeaker; 4, a control circuit board; 5 a first microphone; 6 a second microphone; 7, ear caps; 8, coating silicon wheat; 9 aluminum foil paper; 10, a sound outlet mouth; 11 microphone sound insulation net.

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 efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

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 in specific cases to those skilled in the art.

Referring to fig. 1-7, an embodiment of the present invention discloses an active noise reduction bluetooth headset, which includes a headset housing 1, a power supply 2, a speaker 3, a control circuit board 4, a first microphone 5 for picking up environmental low-frequency noise and a second microphone 6 for picking up speaker voice, wherein the first microphone 5, the second microphone 6, the speaker 3, and the power supply 2 are respectively connected to the control circuit board 4 through circuits; a first cavity 1011 for accommodating the loudspeaker 3 and the power supply 2 and a second cavity 1021 for fixing the control circuit board 4 are arranged in the earphone shell 1, the power supply 2 and the loudspeaker 3 are sequentially fixed in the first cavity 1011, and the control circuit board 4 is arranged in the second cavity 1021 and penetrates into the handheld part 104 of the earphone shell 1; as shown in fig. 7, the control circuit board 4 includes an ANC noise reduction unit, the first microphone 5 includes a sound pickup unit, a filter unit and a coupling unit, the sound pickup unit is connected to the filter unit by a circuit, the filter unit is connected to the coupling unit by a circuit, and the coupling unit is connected to the ANC noise reduction unit by a circuit; the sound pickup unit filters high-frequency noise of picked sound through the filtering unit and then is coupled to the ANC noise reduction unit through the coupling unit, and the ANC noise reduction unit controls the loudspeaker 3 to emit sound waves with opposite phases and same amplitude with the audio frequency according to the audio frequency processed by the first microphone 5 so as to play a role in noise reduction.

In the present invention, the first microphone 5 is used to collect the sound of the surrounding environment, and the second microphone 6 is mainly used to collect the sound of the speaker; wherein second microphone 6 includes the pickup unit, filtering unit and coupling unit, the pickup unit is after gathering all ring edge borders sound, need filtering unit to get rid of the back with high frequency noise, again with noise coupling to ANC fall the unit of making an uproar in, ANC falls the unit of making an uproar and carries out real-time operation to received low frequency noise, then according to operation result real-time control loudspeaker 3 transmission phase opposition, the sound wave that the amplitude is the same offsets with environment low frequency noise, thereby fall the noise to environment noise effectively, and then improve tone quality effect when listening to the content.

As shown in fig. 2 and 3, in the present embodiment, the earphone shell 1 is disposed to include a first cavity 1011 for accommodating the speaker 3 and the power supply 2 and a second cavity 1021 for fixing the control circuit board 4, so that the control circuit board 4, the speaker 3 and the power supply 2 can be effectively fixed, and the structure design is reasonable.

Specifically, the earphone shell 1 comprises a front shell 101, a middle shell 102 and a rear cover 103, wherein a first cavity 1011 is formed between the front shell 101 and the middle shell 102 and used for fixing the power supply 2 and the loudspeaker 3; a second cavity 1021 is formed between the middle shell 102 and the rear cover 103 and used for fixing and limiting the control circuit board 4; the space in the earphone shell 1 is reasonably planned, so that the accommodating space is reduced; in addition, the earphone shell 1 is divided into a front shell 101, a middle shell 102 and a rear cover 103, so that the control circuit board 4, the power supply 2 and the loudspeaker 3 can be conveniently installed and maintained. In this embodiment, the first microphone 5 is located inside the rear cover 103, and the second microphone 6 is located at the lower end of the handheld portion 104, so that the first microphone 5 and the second microphone 6 have a certain distance, which is more beneficial for the first microphone 5 to pick up the ambient sound. Moreover, the first microphone 5 is located on the rear cover 103, and the sound outlet 10 of the bluetooth headset is located at the front end of the front shell 101, so that the sound outlet is conveniently far away from the microphone sound outlet, and the sound of the sound outlet is prevented from interfering with the first microphone 5.

Further, as shown in fig. 2 and 3, a first fixing bracket 1031 for fixing the first microphone 5 is disposed on the inner side of the rear cover 103, and a second fixing bracket 1022 for fixing the second microphone 6 is disposed in the handheld portion 104, so as to facilitate the limiting and fixing of the first microphone 5 and the second microphone 6; be equipped with the first pickup hole 1032 that is linked together with first microphone 5 on the back lid 103, be equipped with the second pickup hole 1023 that is linked together with second microphone 6 on the mesochite 102, make things convenient for first microphone 5 and second microphone 6 to pick up sound. First sound pickup hole 1032 and second sound pickup hole 1023 are preferably vertical sound guide holes.

Further, as shown in fig. 4, the first microphone 5 and the second microphone 6 are respectively provided with a silicon microphone sleeve 8, which is beneficial to improving the sound insulation effect of the microphones. Wherein, still be provided with microphone sound insulation net 11 between silicon microphone cover 8 and first pickup hole 1032, the second pickup hole 1023 respectively to avoid loudspeaker 3's vibrations to produce the influence to first pickup hole 1032, second pickup hole 1023.

Further, an aluminum foil paper 9 for performing a touch sensing function is further arranged between the control circuit board 4 and the rear cover 103, and the aluminum foil paper 9 is in circuit connection with the control circuit board 4, so that touch control can be conveniently realized on the earphone shell 1 of the bluetooth earphone, for example, the operation of switching the working modes (such as answering a call, playing music, and the like) of the bluetooth earphone or switching songs, adjusting the volume, and the like can be performed. However, how to implement the touch control for switching the working modes belongs to the prior art, and redundant description is omitted here.

Further, as shown in fig. 1 and fig. 5, the active noise reduction bluetooth headset of this embodiment further includes a sound outlet 10, the sound outlet 10 is connected to the front end of the front shell 101, and an ear cap 7 is sleeved outside the sound outlet 10 for protecting the sound outlet 10, and meanwhile, the sound insulation effect can be achieved, so as to achieve a better noise reduction effect; a convex ring 1012 used for limiting the loudspeaker 3 is arranged in the front shell 101 in front of the outlet of the sound outlet 10, and the loudspeaker 3 is fixed in the convex ring 1012; a sealed front sound cavity 1013 is formed between the speaker 3 and the sound outlet 10, and the front sound cavity 1013 is communicated with the sound outlet 10. In this embodiment, under the condition of satisfying the ergonomics, the front sound cavity 1013 is additionally provided, so that the speaker 3 is spaced from the sound outlet 10 by a certain distance; when the consumer took this embodiment bluetooth headset, because loudspeaker 3 has a certain distance apart from a sound mouth 10 when, consequently loudspeaker 3 among this embodiment bluetooth headset is farther apart from the ear than loudspeaker 3 among current bluetooth headset, and loudspeaker 3's size just no longer too much receives the restriction of external auditory canal size this moment, just so can install loudspeaker 3 of bigger diameter in first cavity 1011 to bluetooth headset's tone quality effect can be improved.

Wherein, be equipped with a boss 10121 that is used for spacing loudspeaker 3 in the bulge loop 1012, carry on spacing and fixed loudspeaker 3 through boss 10121.

Further, the curve transition from the left side of the front shell 101 to the right side of the front shell 101 causes the outer shape of the front shell 101 to form a conical shape with the end biased to one side of the front shell 101; the mouthpiece 10 is attached to the tapered end of the front case 101. If the horn 3 is too far away from the sound outlet 10, the sound emitted from the sound outlet 10 is small, so that the user experience is affected; therefore, the present embodiment designs the front shell 101 in a tapered shape in profile, so that the front sound chamber 1013 is tapered; in addition, the front shell 101 is conical and is biased to one side of the front shell 101, which is also based on the requirement of human engineering, so as to ensure that the user does not feel uncomfortable when wearing the bluetooth headset of this embodiment.

In this embodiment, the sound outlet 10 is disposed at one end of the front sound cavity 1013, and the sound outlet 10 forms an included angle greater than 100 ° with the horn 3, so that the sound outlet 10 is close to the horn 3, so as to avoid that the sound emitted by the sound outlet 103 is small due to the presence of the front sound cavity 1013.

Further, a tuning hole 1014 is provided in the front chamber 1013. In this embodiment, while the size of the speaker 3 is increased, the front sound cavity 1013 can generate an echo effect on the vibration of the speaker 3, and the sound quality effect of the bluetooth headset can be further improved; and in the process of loudspeaker 3 vibration, atmospheric pressure can form in the front sound chamber 1013, and the tone quality effect of bluetooth headset can be more ideal through the regulation of tuning hole 1014 to atmospheric pressure this moment.

To sum up, the utility model discloses contain among the active noise reduction bluetooth headset and be used for picking up the first microphone 5 of environment low frequency noise and be used for picking up the second microphone 6 of speaker sound, contain among the control circuit board 4 ANC noise reduction unit, including pickup unit in the first microphone 5, filter unit and coupling unit, pickup unit picks up external environment noise after, high frequency noise in the environment noise that will pick up through filter unit filters the back, only remain low frequency noise, then pass through coupling unit coupling to ANC noise reduction unit with low frequency noise, ANC noise reduction unit carries out real-time operation to received low frequency noise, then according to operation result real-time control loudspeaker 3 transmission phase opposition, the same sound wave of amplitude offsets with environment low frequency noise, thereby effectively fall the noise reduction to environment noise.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An active noise reduction Bluetooth headset is characterized by comprising a headset shell, a power supply, a loudspeaker, a control circuit board, a first microphone for picking up low-frequency noise of the environment and a second microphone for picking up voice of a speaker, wherein the first microphone, the second microphone, the loudspeaker and the power supply are respectively in circuit connection with the control circuit board; the earphone shell is internally provided with a first cavity for accommodating a loudspeaker and a power supply and a second cavity for fixing a control circuit board, the power supply and the loudspeaker are sequentially fixed in the first cavity, and the control circuit board is arranged in the second cavity and penetrates into a handheld part of the earphone shell; the control circuit board comprises an ANC noise reduction unit, the first microphone comprises a pickup unit, a filtering unit and a coupling unit, the pickup unit is connected with the filtering unit through a circuit, the filtering unit is connected with the coupling unit through a circuit, and the coupling unit is connected with the ANC noise reduction unit through a circuit; the sound pickup unit filters high-frequency noise of picked sound through the filtering unit and then is coupled to the ANC noise reduction unit through the coupling unit, and the ANC noise reduction unit controls the loudspeaker to emit sound waves with opposite phases and same amplitude with the audio frequency according to the audio frequency processed by the first microphone so as to play a role in noise reduction.

2. The active noise reduction bluetooth headset of claim 1, wherein the headset housing comprises a front housing, a middle housing and a rear cover, the front housing and the middle housing form the first cavity therebetween, and the middle housing and the rear cover form the second cavity therebetween; the first microphone is located inside the rear cover, and the second microphone is located at the lower end of the hand-held portion.

3. The active noise reduction Bluetooth headset of claim 2, wherein a first fixing bracket for fixing the first microphone is disposed inside the rear cover, and a second fixing bracket for fixing the second microphone is disposed inside the handle; the rear cover is provided with a first sound pickup hole communicated with the first microphone, and the middle shell is provided with a second sound pickup hole communicated with the second microphone.

4. The active noise reduction Bluetooth headset of claim 3, wherein the first microphone and the second microphone are respectively wrapped with a silicon microphone sleeve.

5. The active noise reduction Bluetooth headset of claim 4, wherein a microphone sound insulation net is disposed between the silicon microphone sleeve and the first sound pickup hole, and a microphone sound insulation net is also disposed between the silicon microphone sleeve and the second sound pickup hole.

6. The active noise reduction Bluetooth headset of claim 2, wherein an aluminum foil for touch sensing is further disposed between the control circuit board and the rear cover, and the aluminum foil is electrically connected to the control circuit board.

7. The active noise reduction bluetooth headset of claim 2, further comprising a sound outlet nozzle connected to the front end of the front housing; a convex ring used for limiting the loudspeaker is arranged in the front shell and positioned in front of the sound outlet mouth, and the loudspeaker is fixed in the convex ring; a sealed front sound cavity is formed between the horn and the sound outlet nozzle, and the front sound cavity is communicated with the sound outlet nozzle.

8. The active noise reduction bluetooth headset of claim 7, wherein the curve transition from the left side of the front housing to the right side of the front housing forms a tapered shape with a distal end biased toward one side of the front housing; the sound outlet nozzle is connected to the conical tail end of the front shell.

9. The active noise reduction bluetooth headset of claim 7, wherein the front sound cavity is provided with a tuning hole.

10. The active noise reduction bluetooth headset of claim 7, wherein the sound outlet is located at one end of the front sound cavity and forms an angle greater than 100 ° with the speaker.