CN215773497U

CN215773497U - Active noise reduction Bluetooth headset

Info

Publication number: CN215773497U
Application number: CN202120857313.4U
Authority: CN
Inventors: 周文杰; 邓剑
Original assignee: Shenzhen Baifan Technology Co ltd
Current assignee: Shenzhen Baifan Technology Co ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2022-02-08
Anticipated expiration: 2031-04-23

Abstract

The invention relates to an active noise reduction Bluetooth headset, which comprises: the earphone middle shell comprises an accommodating space, and one side of the earphone middle shell is provided with an opening part; the loudspeaker bottom shell is arranged on one side of the earphone middle shell; the noise reduction module comprises an FPC (flexible printed circuit) board, a light-sensitive in-ear detector, a loudspeaker and a noise reduction microphone; the FPC circuit board is electrically connected with the light-sensing in-ear detector, the loudspeaker and the noise reduction microphone respectively; and one end of the FPC board is provided with an interface, and the interface penetrates through the opening part of the middle shell of the earphone and is connected with the main control PCB. The Bluetooth headset is simple and reliable to assemble, the production cost is greatly reduced, the noise reduction module is communicated with the main control PCB through the FPC golden finger or the socket, the noise reduction cavity is good in consistency and isolated from the main control PCB, and the technical problems of echo and noise reduction deterioration caused by the fact that loudspeaker vibration is received by the main control PCB calling microphone and the FF microphone are thoroughly solved.

Description

Active noise reduction Bluetooth headset

Technical Field

The invention relates to an earphone, in particular to an active noise reduction Bluetooth earphone.

Background

At present, the noise reduction effect experience of the TWS ANC Bluetooth headset is better by adopting FF and FB noise reduction microphones to mix ANC noise reduction. The uniformity that must manage and control the earphone cavity of good noise reduction effect will be reached, because FB falls the microphone of making an uproar and the light sense goes into ear detector near loudspeaker, traditional assembled mode passes through the flatiron with the battery, loudspeaker, the light sense goes into ear detector and FB and falls the circuit welding of the microphone of making an uproar to master control PCB board, the complicated production equipment of welding circuit is numerous, and the high yield of efficiency is low, earphone cavity and master control PCB board intercommunication, loudspeaker vibrations are received the conversation microphone and the FF microphone echo of master control PCB and can't thoroughly solve, loudspeaker vibrations are received by master control PCB's FF microphone and are made the noise reduction effect worsen, bluetooth headset inside soldering circuit blocks the air current and flows, the cavity uniformity can't be guaranteed, cause the cavity curve to worsen, it does not have the noise reduction even to fall the degree of depth of making an uproar. The problem that large-scale popularization cannot be carried out is not solved; how to reduce the production cost of the existing TWS ANC Bluetooth noise reduction earphone, so that the problem of large-scale popularization is urgently needed to be solved.

Disclosure of Invention

The invention mainly aims to provide an active noise reduction Bluetooth headset, and aims to solve the technical problems that a traditional TWS ANC Bluetooth headset is poor in noise reduction effect, cavity consistency cannot be guaranteed, cavity curves are poor, and noise reduction depth is not uniform.

In order to achieve the above object, the present invention provides an active noise reduction bluetooth headset, comprising:

the earphone middle shell comprises an accommodating space, and one side of the earphone middle shell is provided with an opening part;

the loudspeaker bottom shell is arranged on one side of the earphone middle shell; and the number of the first and second groups,

the noise reduction module comprises an FPC (flexible printed circuit) board, a light-sensitive in-ear detector, a loudspeaker and a noise reduction microphone;

the FPC circuit board is electrically connected with the light-sensing in-ear detector, the loudspeaker and the noise reduction microphone respectively;

and one end of the FPC board is provided with an interface, and the interface penetrates through the opening part of the middle shell of the earphone and is connected with the main control PCB.

Furthermore, the earphone shell is installed on the earphone middle shell, and the main control PCB board is located in the inner space of the earphone shell and the earphone middle shell.

Furthermore, the interface is a golden finger interface or a socket, and the FPC board is electrically connected with the main control PCB board through the golden finger interface or the socket.

Further, the noise reduction module further comprises a battery, wherein the battery is fixed on the FPC circuit board in a welding or socket mode, and the battery is configured to provide electric energy for the main control PCB and the noise reduction module.

Furthermore, still include loudspeaker front chamber tuning net and loudspeaker back chamber tuning net, loudspeaker front chamber tuning net, loudspeaker back chamber tuning net are all inlayed the inside of loudspeaker drain pan.

The light-sensitive in-ear detector is attached to the FPC circuit board, and the light filter is fixed on the inner wall of the loudspeaker bottom shell.

Further, the loudspeaker are embedded on the loudspeaker bottom shell and sealed, a first cavity is formed at the first end of the loudspeaker, and the loudspeaker front cavity tuning net is configured to adjust the first cavity and the external airflow of the earphone.

Further, the second end of the speaker and the earphone middle shell form a second cavity, and the speaker rear cavity tuning net is configured to adjust the second cavity and air flow outside the earphone.

Further, the active noise reduction Bluetooth headset further comprises an earcap and a dustproof net, wherein the earcap is located on one side of the loudspeaker bottom shell, and the dustproof net is installed between the earcap and the loudspeaker bottom shell.

Compared with the prior art, the invention has the beneficial technical effects that: 1. according to the invention, the noise reduction module is designed in an integrated manner, the light sensing in-ear detector, the loudspeaker and the noise reduction microphone are integrated on the FPC circuit board, and the noise reduction module is connected with the main control PCB in a modularized manner, so that the Bluetooth headset is simple and reliable to assemble, and the production cost is greatly reduced; 2. the noise reduction module is assembled with the earphone middle shell and the loudspeaker bottom shell to form a closed cavity module, the opening part of the FPC board in the earphone middle shell is sealed by sealant, the noise reduction module is communicated with the main control PCB board through an FPC golden finger or a socket, the noise reduction cavity is good in consistency and isolated from the main control PCB board, and the technical problems of echo and noise reduction deterioration caused by the fact that loudspeaker vibration is received by a main control PCB board calling microphone and an FF microphone are thoroughly solved; 3. according to the invention, the first end of the loudspeaker forms the first cavity, the sound-adjusting net in the front cavity of the loudspeaker adjusts the first cavity and the external air flow of the earphone, the second end of the loudspeaker and the middle shell of the earphone form the second cavity, and the second cavity and the external air flow of the earphone are adjusted through the sound-adjusting net in the rear cavity of the loudspeaker, so that the situations that the traditional TWS ANC Bluetooth earphone blocks the air flow due to the internal welding circuit, the cavity curve is poor, the noise reduction depth is uneven, and even the noise reduction effect is not generated are avoided, and the experience of a user is greatly improved.

Drawings

Fig. 1 is an exploded view of an active noise reduction bluetooth headset in accordance with an embodiment of the present invention;

FIG. 2 is a rear view of an active noise reduction Bluetooth headset according to an embodiment of the present invention;

FIG. 3 is a front view of an active noise reduction Bluetooth headset according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view of an active noise reduction Bluetooth headset in accordance with an embodiment of the present invention;

the reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Noise reduction module	11	Earphone panel
12	Master control PCB board	13	FPC circuit board assembly
				14	Dust-proof net	15	Ear cap
101	Earphone middle shell	102	Loudspeaker bottom shell
				103	Optical filter	104	Tuning net for front cavity of horn
105	Rear cavity tuning net of loudspeaker	131	Interface
				132	Battery with a battery cell	133	Light-sensing ear-entering detector
134	Noise reduction microphone	135	Horn type loudspeaker
				136	FPC circuit board

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are 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" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

As shown in fig. 1 to 4, the present embodiment provides an active noise reduction bluetooth headset, including: a middle earphone case 101, the middle earphone case 101 including a receiving space, the middle earphone case 101 having an opening (not shown) at one side thereof; a speaker bottom case 102 installed at one side of the earphone middle case 101; the noise reduction module 10 specifically comprises an FPC circuit board 136, a light-sensitive ear detector 133, a speaker 135 and a noise reduction microphone 134; the FPC board 136 is electrically connected to the photo-sensing ear detector 133, the speaker 135, and the noise reduction microphone 134, respectively; one end of the FPC board 136 has an interface which is connected to the main control PCB 12 after passing through the opening of the earphone middle case 101.

In the present invention, the noise reduction module 10 is an integrated design, specifically, the light-sensing ear detector 133, the speaker 135 and the noise reduction microphone 134 are respectively integrated on the FPC board 136 in a module form, for example, the light-sensing ear detector 133 is attached to the FPC board by surface mounting, the speaker 135 may be soldered on the substrate of the FPC board 136 by a lead, and the noise reduction microphone 134 is attached to the FPC board 136 by surface mounting, but may also be integrated on the FPC board 136 by other means, which is not limited herein. The noise reduction module 10 is connected to the main control PCB 12 in a modular manner, for example, the noise reduction module 10 passes through an interface at one end of the FPC board 136, and after the interface passes through an opening of the middle shell 101 of the earphone, the interface is connected to the main control PCB 12 in a contact manner, for example, by means of a gold finger of FPC or a socket. In this embodiment, the light-sensing ear detector 133, the speaker 135 and the noise reduction microphone 134 are integrated on the FPC board 136, and the noise reduction module 10 is connected to the main control PCB 12 in a modular manner.

Preferably, the bluetooth headset of the present invention further includes a headset housing 11, the headset housing 11 is mounted on the headset middle housing 101, the headset housing 11 and the headset middle housing 101 enclose an internal space, and the main control PCB 12 is located in the internal space formed by the headset housing 11 and the headset middle housing 101, and is used for fixing and limiting the main control PCB 12.

In some embodiments, the bluetooth headset further includes a battery 132, the battery 132 may be fixed on the FPC board 136 by welding or a socket, the battery 132 is configured to provide power to the main control PCB 12 and the noise reduction module 10, the battery 132 may be a storage battery or a rechargeable battery, and in this embodiment, the battery 132 is a rechargeable lithium ion battery.

In some embodiments, the bluetooth headset further includes a front speaker cavity tuning net 104 and a rear speaker cavity tuning net 105, the front speaker cavity tuning net 104 and the rear speaker cavity tuning net 105 are all embedded inside the bottom speaker shell 102, the embedding includes gluing, fixing a double-faced adhesive tape, fixing a double-color mold, and the like, the front speaker cavity tuning net 104 can adjust the sound effect according to the surrounding environment of the bluetooth headset, the rear speaker cavity tuning net 105 can be used for adjusting the external airflow of the bluetooth headset, and the sound quality effect with higher quality can be obtained through the joint adjustment of the front speaker cavity tuning net 104 and the rear speaker cavity tuning net 105.

Preferably, the bluetooth headset further includes an optical filter 103, the optical filter 103 is used for filtering light passing through the light-in-ear detector 133 to improve the detection efficiency and accuracy of the light-in-ear detector 133, in some embodiments, the light-in-ear detector 133 is attached to the FPC board 136, and the optical filter 103 is fixed on the inner wall of the speaker bottom case 102.

In some embodiments, the speaker 135 is embedded in the speaker bottom case 102 and sealed, a first end (also referred to as a speaker front end) of the speaker 135 forms a first cavity, the first cavity can be matched with the speaker front cavity tuning net 104, sound of an external environment of the bluetooth headset is buffered after passing through the first cavity, and a better sound quality effect is obtained after adjustment of the speaker front cavity tuning net 104.

In some embodiments, a second end of the horn 135 (which may also be referred to as a horn rear end) forms a second cavity with the headset middle housing 101, and the horn rear cavity tuning mesh 105 is configured to regulate the second cavity and airflow outside the headset.

In the present invention, the noise reduction microphone 134 may also be attached to the FPC board 136 by surface mounting and embedded on the shell of the diaphragm surface of the speaker 135, and the noise reduction microphone 134 is an FB noise reduction microphone, so as to obtain a better light sensing detection effect, the light sensing ear detector 133 and the optical filter 103 may adjust the intensity of the detected light according to the requirement, for example, the detection sensitivity of the light sensing ear detector 133 may be improved, and the filtering efficiency of the optical filter 103 may be enhanced to complete the adjustment.

Because the existing assembly mode of the active noise reduction earphone is to connect all parts by welding, the noise reduction cavity and the main control PCB are connected into a whole to interfere with each other, the welding lines are numerous, the production and the assembly are complex, the efficiency is not high, the yield is low, the production cost of the noise reduction earphone is increased, and the large-scale popularization cannot be realized; the noise reduction module 10 forms a core noise reduction unit of the Bluetooth headset, the independent noise reduction parameters of the cavity in the noise reduction unit 10 are stable, and the noise reduction module 10 is independent of the main control PCB 12, so that the technical problems of echo and noise reduction deterioration caused by the fact that the vibration of a loudspeaker 135 is received by a call microphone and an FF microphone of the main control PCB 12 are thoroughly solved.

In some embodiments, the noise reduction module 10 can be implemented by combining a noise reduction microphone 134 therein, such as an FB noise reduction microphone, with an FF microphone on the external master PCB board 12 to achieve mixed depth noise reduction for some interfering and confusing sounds.

In the invention, the FPC board 136 can also adopt a rigid-flex board, and the arrangement of the FPC board or the rigid-flex board can reduce the space occupied by the whole active noise reduction Bluetooth headset, thereby reducing the production and processing cost of the active noise reduction Bluetooth headset.

In some embodiments, the FPC board 136 seals an interface (e.g., an outlet) of the middle shell 101 of the earphone with a sealant to form a stable sealed cavity to ensure the consistency of noise reduction, and only provides a noise reduction module golden finger interface (or socket) to the outside, and after connecting the noise reduction module golden finger interface (or socket) with the main control PCB 12, the earphone face shell 11 is covered, and then the dust screen 14 is attached to one side of the speaker bottom shell 102, and finally the earcap 15 is installed, where the earcap 15 may be, for example, a silica gel earcap, so that the assembly of the bluetooth earphone is completed.

In the invention, the noise reduction module is designed in an integrated manner, the light sensing in-ear detector, the loudspeaker and the noise reduction microphone are integrated on the FPC circuit board, and the noise reduction module is connected with the main control PCB in a modularized manner, so that the Bluetooth headset is simple and reliable to assemble, and the production cost is greatly reduced; the noise reduction module is assembled with the earphone middle shell and the loudspeaker bottom shell to form a closed cavity module, the opening part of the FPC board in the earphone middle shell is sealed by sealant, the noise reduction module is communicated with the main control PCB through an FPC golden finger or a socket, the noise reduction cavity is good in consistency and isolated from the main control PCB, and the technical problems of echo and noise reduction deterioration caused by the fact that loudspeaker vibration is received by a main control PCB call microphone and an FF microphone are thoroughly solved; according to the invention, the first end of the loudspeaker forms the first cavity, the second end of the loudspeaker and the middle shell of the earphone form the second cavity, and the second cavity and the external airflow of the earphone are adjusted through the rear cavity tuning net of the loudspeaker, so that the situations that the cavity curve is poor, the noise reduction depth is uneven and even the noise reduction effect is not generated due to the fact that the airflow is blocked by an internal welding circuit of the traditional TWS ANC Bluetooth earphone are avoided, and the experience of a user is greatly improved.

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 changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An active noise reduction Bluetooth headset, comprising:

2. The active noise reduction Bluetooth headset of claim 1, further comprising a headset face housing mounted on the headset middle housing, wherein the master PCB is located in an inner space between the headset face housing and the headset middle housing.

3. The active noise reduction Bluetooth headset of claim 1, wherein the interface is a gold finger interface or a socket, and the FPC board is electrically connected to the main control PCB board through the gold finger interface or the socket.

4. The active noise reduction bluetooth headset of claim 1, wherein the noise reduction module further comprises a battery, the battery is fixed on the FPC board by means of soldering or a socket, and the battery is configured to supply power to the main control PCB board and the noise reduction module.

5. The active noise reduction Bluetooth headset of claim 1, further comprising a front cavity tuning mesh and a rear cavity tuning mesh, wherein the front cavity tuning mesh and the rear cavity tuning mesh are embedded inside the bottom shell of the speaker.

6. The active noise reduction Bluetooth headset of claim 1, further comprising an optical filter for filtering light passing through the light incoming ear detector, wherein the light incoming ear detector is attached to the FPC board, and the optical filter is fixed to an inner wall of the speaker bottom case.

7. The active noise reduction bluetooth headset of claim 1, wherein the speaker is embedded in the speaker bottom case and sealed, and a first end of the speaker forms a first cavity.

8. The active noise reduction Bluetooth headset of claim 1, wherein the second end of the speaker and the headset center housing form a second cavity, and a speaker back cavity tuning mesh is configured to regulate the second cavity and airflow outside the headset.

9. The active noise reduction Bluetooth headset of any one of claims 1-8, further comprising an ear cap and a dust screen, wherein the ear cap is located at one side of the speaker bottom case, and the dust screen is installed between the ear cap and the speaker bottom case.