CN208386887U - A kind of bluetooth earplug - Google Patents

Abstract

The utility model relates to a kind of bluetooth earplugs, including outer housing, main Mike, secondary Mike, active noise reduction chip, Bluetooth chip, SPDT relay and the loudspeaker for being connected to Bluetooth chip output end；Main Mike is connected to the first input end of Bluetooth chip, the enable end of Bluetooth chip is connect with the coil of SPDT relay, for when bluetooth earplug is switched to and is listened to music enable end control SPDT relay obtain it is electric, and when switching to call enable end control SPDT relay electric-loss；The common pin of secondary Mike connection SPDT relay, second input terminal of the normally closed pin connection Bluetooth chip of SPDT relay, the input terminal of the normally opened pin connection active noise reduction chip of SPDT relay, the third input terminal of the output end connection Bluetooth chip of active noise reduction chip.For realizing the function of drop low wind noise and active noise reduction in bluetooth earplug small space, bluetooth earplug noise reduction effect is improved, and efficiently use bluetooth earplug inner space.

Description

A kind of bluetooth earplug

Technical field

The utility model belongs to earplug technical field, and in particular to a kind of bluetooth earplug.

Background technique

Bluetooth earplug (for example, built-in earplug and half built-in earplug etc.) due to its it is small and exquisite portable and by users Consistent favor, have the function of to listen song and call function, inside need to place various chips, sensor, battery and loudspeaker etc. Numerous elements, usually common bluetooth earplug generally use diamylose gram to carry out noise reduction, and a main Mike is used to converse, a secondary Mike For dropping low wind noise, environmental noise or echo, but the not function of active noise reduction, and it is more with active noise reduction function at present For high-end headphone, it is provided with active noise reduction Mike inside it, but is limited to small space inside common bluetooth earplug And cost limitation, it is difficult to increase an active noise reduction Mike realization active noise reduction function, causes noise reduction effect poor.

Utility model content

The utility model provides a kind of bluetooth earplug, for realizing drop low wind noise and active in bluetooth earplug small space The function of noise reduction improves bluetooth earplug noise reduction effect, and efficiently uses bluetooth earplug inner space.

In order to solve the above-mentioned technical problem, the following technical solutions are proposed is resolved for the utility model institute:

A kind of bluetooth earplug, which is characterized in that including outer housing and be arranged at the intracorporal main Mike of the shell, secondary wheat Gram, active noise reduction chip, Bluetooth chip, SPDT relay and the loudspeaker for being connected to the Bluetooth chip output end；The master Mike is connected to the first input end of the Bluetooth chip, the coil of the enable end of the Bluetooth chip and the SPDT relay Connection controls the SPDT relay for the enable end described when the bluetooth earplug is switched to and listened to music and obtains electric, and cutting It shifts to enable end when call and controls the SPDT relay electric-loss；The secondary Mike connects the public of the SPDT relay Pin, the normally closed pin of the SPDT relay connect the second input terminal of the Bluetooth chip, the SPDT relay it is normal The input terminal that pin connects the active noise reduction chip is opened, the output end of the active noise reduction chip connects the Bluetooth chip Third input terminal.

Further, the active noise reduction chip is AMS AS3415, AS3421 or AS3422.

Further, the Bluetooth chip is CSR8670 or CSR8645.

Further, the bluetooth earplug further includes the first filter circuit and the second filter circuit, first filtered electrical Road is arranged between the main Mike and the first input end of the Bluetooth chip, and second filter circuit is arranged described Between secondary Mike and the common pin of the SPDT relay.

Further, in order to improve design flexibility, space in bluetooth earplug is efficiently used, the bluetooth earplug further includes Flexible circuit board, the secondary Mike, SPDT relay and active noise reduction chip are arranged on the flexible circuit board.

Further, the main Mike is digital microphone or simulation Mike, and the secondary Mike is digital microphone or simulation Mike.

Compared with prior art, the advantages of the bluetooth earplug of the utility model and beneficial effect is: in call, main Mike Output signal be input to Bluetooth chip, the enable end of Bluetooth chip exports low level, and the normally closed pin of SPDT relay makes pair The output signal of Mike is input to Bluetooth chip, for the noise reduction in call；When listening to music, the enable end of Bluetooth chip is exported High level, the normally opened pin closure of SPDT relay keep the output signal of secondary Mike blue by inputting after active noise reduction chip processing Tooth chip realizes that secondary Mike makes an uproar or both echo noise reduction and active noise reduction for reducing wind for the active noise reduction when listening to music Multiplexing, efficiently use bluetooth earplug in space.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be practical to this New embodiment or attached drawing needed to be used in the description of the prior art are made one and are briefly introduced, it should be apparent that, it is described below Attached drawing is some embodiments of the utility model, for those of ordinary skill in the art, is not being made the creative labor Under the premise of, it can also be obtained according to these attached drawings other accompanying drawings.

Fig. 1 is the working principle block diagram of the bluetooth earplug of the utility model.

Specific embodiment

It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to The range of the utility model protection.

Since the bluetooth earplug inner space of such as built-in earplug and half built-in earplug is narrow, it is difficult with main wheat Gram 1 and secondary Mike 2 on the basis of be further added by the Mike for active noise reduction, this is based on, in order in effective use bluetooth ear Bluetooth earplug noise reduction effect is improved in filling in while the confined space, the present embodiment is related to a kind of bluetooth earplug comprising outer housing (not shown) and it is arranged at the intracorporal main Mike 1 of shell, secondary Mike 2, SPDT relay 3, active noise reduction chip 4, bluetooth core Piece 5 and the loudspeaker SPK 6 for being connected to 5 output end of Bluetooth chip, main Mike 1 are connected to the first input end of Bluetooth chip 5, blue The enable end OE of tooth chip 5 is connect with the coil of SPDT relay 3, for the enable end OE when bluetooth earplug is switched to and listened to music Controlling SPDT relay 3 must be electric, and the enable end controls the SPDT relay electric-loss when switching to call；Secondary Mike 2 Connect the common pin of SPDT relay 3, the second input terminal of the normally closed pin connection Bluetooth chip 5 of SPDT relay 3, SPDT The input terminal of the normally opened pin connection active noise reduction chip 4 of relay 3, the output end of active noise reduction chip 4 connect Bluetooth chip 5 Third input terminal.Secondary Mike 2 is multiplexed with the function of drop low wind noise and active noise reduction by the present embodiment, that is, pair is utilized when call Mike 2, which drops when wind is made an uproar and listened to music, utilizes 2 active noise reduction of secondary Mike.

Specifically, as shown in Figure 1, in the present embodiment, active noise reduction chip 4 can for AMS AS3415, AS3421 or AS3422, naturally it is also possible to be the other kinds of chip for realizing active noise reduction function, herein with no restrictions；Bluetooth chip 5 can Think CSR8670 or CSR8645 or other kinds of chip, herein with no restrictions.When bluetooth earplug is conversed and listens to music different Carry out, therefore, in the present embodiment, for different situations by single-pole double-throw switch (SPDT) (Single Pole Double Throw, Abbreviation SPDT) relay 3 switches over noise reduction, in call, main Mike 1 by person of modern times mouth for conversing, the letter of output The first input end of Bluetooth chip 5 number is directly inputted, the enable end OE of Bluetooth chip 5 exports low level, SPDT relay 3 at this time Must not be electric, so that the signal that secondary Mike 2 exports directly inputs the second input terminal of Bluetooth chip 5, realize drop low wind noise；In audition When happy, the enable end OE of Bluetooth chip 5 exports high level, and SPDT relay 3 must be electric, so that the signal that secondary Mike 2 exports passes through The third input terminal of Bluetooth chip 5 is inputted after the processing of active noise reduction chip 4 again, and then SPK 6 is pushed to realize active noise reduction to shield Environmental noise is covered, does not need to converse when listening to music, therefore main Mike 1 can be closed at this time.

In order to improve the quality for the signal that main Mike 1 and secondary Mike 2 export, first in main Mike 1 and Bluetooth chip 1 is defeated Entering can be set the first filter circuit between end, and can be set between secondary Mike 1 and the common pin of SPDT relay 3 There is the second filter circuit, first or second filter circuit is, for example, RC filter circuit or LC filter circuit, and the present embodiment first is filtered The RC filter circuit that wave circuit is constituted using resistance R1 and capacitor C1, and the second filter circuit is constituted using resistance R2 and capacitor C2 RC filter circuit.

In order to more intelligently design bluetooth earplug, secondary Mike 2, SPDT relay 3 and active noise reduction chip 4 are arranged at one On flexible circuit board (Flexible Printed Circuit, abbreviation FPC), it is not take up bluetooth earplug motherboard space, it can be certainly By adjusting position, the flexibility of design is greatly improved, the use space of bluetooth earplug is improved.Main Mike 1 can in the present embodiment Think digital microphone or simulation Mike, and secondary Mike 2 or digital microphone or simulation Mike.

The bluetooth earplug of the present embodiment, in call, the output signal of main Mike 1 is input to Bluetooth chip 5, Bluetooth chip 5 enable end OE exports low level, and the normally closed pin of SPDT relay 3 makes the output signal of secondary Mike 2 be input to Bluetooth chip 5, for the noise reduction in call；And when listening to music, the enable end OE of Bluetooth chip 5 exports high level, SPDT relay 3 it is normal Opening pin closure makes the output signal of secondary Mike 2 by inputting Bluetooth chip 5 after the processing of active noise reduction chip 4, in audition Active noise reduction when happy realizes the multiplexing that secondary Mike 2 makes an uproar for reducing wind with active noise reduction, efficiently uses space in bluetooth earplug.

Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations； Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out etc. With replacement；And these are modified or replaceed, various embodiments of the utility model technology that it does not separate the essence of the corresponding technical solution The spirit and scope of scheme.

Claims (5)

1. a kind of bluetooth earplug, which is characterized in that including outer housing and be arranged at the intracorporal main Mike of the shell, secondary wheat Gram, active noise reduction chip, Bluetooth chip, SPDT relay and the loudspeaker for being connected to the Bluetooth chip output end；The master Mike is connected to the first input end of the Bluetooth chip, the coil of the enable end of the Bluetooth chip and the SPDT relay Connection controls the SPDT relay for the enable end described when the bluetooth earplug is switched to and listened to music and obtains electric, and cutting It shifts to enable end when call and controls the SPDT relay electric-loss；The secondary Mike connects the public of the SPDT relay Pin, the normally closed pin of the SPDT relay connect the second input terminal of the Bluetooth chip, the SPDT relay it is normal The input terminal that pin connects the active noise reduction chip is opened, the output end of the active noise reduction chip connects the Bluetooth chip Third input terminal.

2. bluetooth earplug according to claim 1, which is characterized in that further include the first filter circuit and the second filtered electrical Road, first filter circuit are arranged between the main Mike and the first input end of the Bluetooth chip, and described second Filter circuit is arranged between the secondary Mike and the common pin of the SPDT relay.

3. bluetooth earplug according to claim 1 or 2, which is characterized in that it further include flexible circuit board, the secondary Mike, SPDT relay and active noise reduction chip are arranged on the flexible circuit board.

4. bluetooth earplug according to claim 1 or 2, which is characterized in that the main Mike is digital microphone or simulation wheat Gram, and the secondary Mike is digital microphone or simulation Mike.

5. bluetooth earplug according to claim 1 or 2, which is characterized in that when the SPDT relay obtains electric, the indigo plant Tooth chip controls close the main Mike.