CN210491202U

CN210491202U - Bluetooth headset goes into ear detection circuitry

Info

Publication number: CN210491202U
Application number: CN201921616679.1U
Authority: CN
Inventors: 丁丽; 吴金波
Original assignee: Shenzhen Aichuangli Technology Co Ltd
Current assignee: Shenzhen Aichuangli Technology Co Ltd
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2020-05-08
Anticipated expiration: 2029-09-26

Abstract

The utility model relates to an ear detection circuitry is gone into to bluetooth headset includes that the model is AB1536 bluetooth chip U1, still includes control circuit, control circuit includes second ESD device D2, touch piece, the H7 pin of bluetooth chip U1 passes through second ESD device D2 and ground, touch piece electric connection; the utility model discloses include control circuit, control circuit includes second ESD device D2, touch-sensitive strip, bluetooth chip U1's H7 pin passes through second ESD device D2 and ground, touch-sensitive strip electric connection, and this kind is through the contact touch-sensitive strip, makes bluetooth chip U1 drive work, has replaced the photoelectricity in the background art and has opened the mode, and simultaneously, the electronic device that this kind of design designed is small in quantity, makes its structure simplify greatly, and then makes manufacturing cost obtain reducing.

Description

Bluetooth headset goes into ear detection circuitry

Technical Field

The utility model relates to an electronic application technology field indicates especially an earphone that connects the use through the bluetooth.

Background

The Bluetooth earphone is added with a Bluetooth connection technology on the basis of a hand-free earphone, so that a user can further avoid annoying wire stumbling through the Bluetooth technology, and the earphone can be used more freely.

The existing Bluetooth headset is provided with an in-ear detection device in the headset for more intellectualization, and whether the Bluetooth headset is in a use state can be determined through the detection device so as to adjust the playing or pause of audio in the Bluetooth headset.

Bluetooth headset income ear detects, generally is used for wearing of Bluetooth headset to detect, when listening to the song with Bluetooth headset, generally needs when taking off one, realizes pause music instant music, after wearing the earphone, the music continues the broadcast.

As shown in fig. 1, fig. 1 is a diagram of a conventional bluetooth circuit, a bluetooth chip of which is AB1536, the bluetooth chip has a complete function, and the circuit performs in-ear detection by using light sensation.

However, the circuit design using the light sensing in-ear detection function requires multiple elements such as a light sensing device, an MCU control circuit, and a power management, which is costly, complex to assemble, and has poor stability.

Disclosure of Invention

In order to solve the above problem, the utility model discloses a first-order object provides a bluetooth headset goes into ear detection circuitry, and this bluetooth headset is equipped with into ear detection device, can also effectively reduce production cycle and reduction in production cost simultaneously.

In order to achieve the above object, the utility model adopts the following technical scheme:

an earphone circuit applying a Bluetooth earphone comprises a Bluetooth chip U1 with the model number AB1536 and is characterized by further comprising a control circuit, wherein the control circuit comprises a second ESD device D2 and a touch sheet, and an H7 pin of the Bluetooth chip U1 is electrically connected with the ground and the touch sheet through the second ESD device D2.

Furthermore, the control circuit further comprises a touch sheet resistor R3 and a touch sheet capacitor C34, the H7 pin of the Bluetooth chip U1 is connected with the second ESD device D2 and the touch sheet through the touch sheet resistor R3, the second ESD device D2 is connected with the touch sheet capacitor C34, and the H7 pin of the Bluetooth chip U1 is grounded through the touch sheet capacitor C34.

Furthermore, the charging circuit is also included, the charging circuit includes a first ESD device D1, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a fourteenth resistor R14, a fifteenth resistor R15, a third fet Q3, and a fourth fet Q4, the pin a5 of the bluetooth chip U1 is connected to the drain of the third fet Q3 through the first ESD device D1 of the third fet Q3, the source of the third fet Q3 is connected to the first ESD device D1, the ninth resistor R9, the eleventh resistor R9, and the tenth resistor R9, the tenth resistor R9 is connected to the gate of the third fet Q9, the eleventh resistor R9 is connected to the fifteenth resistor R9, the first ESD device D9, the ninth resistor R9, the fourteenth resistor R9, the fifteenth resistor R9, the fourth fet Q9, the drain of the fourth fet Q9 is connected to the ground, the drain of the fourth fet 9 and the drain of the third fet 9 is connected to the ground, the grid of the fourth field effect transistor is connected with an H11 pin of a Bluetooth chip U1 and a fifteenth resistor R15, and the fourteenth resistor R14 is also connected with an H6 pin of the Bluetooth chip U1.

Furthermore, the MIC circuit includes a microphone J1, a thirty-third capacitor C33, and a thirty-second capacitor C32 of a type 3722F, a pin C2 of the bluetooth chip U1 is connected to a pin 1 of the microphone J1 and a pin C32 of the thirty-second capacitor, a pin C32 of the thirty-second capacitor is further connected to ground, a pin 2 and a pin 3 of the microphone J1 are both connected to a pin E3 of the bluetooth chip U1, a pin 4 of the microphone J1 is connected to the pin C33 of the thirty-third capacitor and a pin E3 of the bluetooth chip U1, and the thirty-third capacitor C33 is connected to ground.

Furthermore, the bluetooth module further comprises a reset circuit, wherein the reset circuit comprises a first triode Q1, a second triode Q2, a twenty-fifth capacitor C25, a twenty-sixth capacitor C26, a fifth resistor R5 and a seventh resistor R7, a pin a5 of the bluetooth chip U1 is connected with bases of a twenty-sixth capacitor C26, a fifth resistor R5 and a first triode Q1 through the twenty-fifth capacitor C25, a collector of the first triode Q1 is connected with a pin a4 of the bluetooth chip U1, an emitter of the first triode Q1 is connected with a collector of the second triode Q2, a pin B7 of the bluetooth chip U1 is connected with a base of the second triode Q2 through the seventh resistor R7, and an emitter of the second triode Q2 is grounded.

The utility model has the advantages that:

the utility model discloses include control circuit, control circuit includes second ESD device D2, touch-sensitive strip, bluetooth chip U1's H7 pin passes through second ESD device D2 and ground, touch-sensitive strip electric connection, and this kind is through the contact touch-sensitive strip, makes bluetooth chip U1 drive work, has replaced the photoelectricity in the background art and has opened the mode, and simultaneously, the electronic device that this kind of design designed is small in quantity, makes its structure simplify greatly, and then makes manufacturing cost obtain reducing.

Drawings

Fig. 1 is a circuit diagram of the prior art.

Fig. 2 is a circuit diagram of the bluetooth chip U1 of the present invention.

Fig. 3 is a circuit diagram of the control circuit of the present invention.

Fig. 4 is a circuit diagram of the charging circuit of the present invention.

Fig. 5 is a connection diagram of the battery and the chip U4 according to the present invention.

Fig. 6 is a circuit diagram of the MIC of the present invention.

Fig. 7 is a circuit diagram of the reset circuit of the present invention.

Detailed Description

In order to make the technical solution and the technical problems solved by the present application clearer and more clearly understood, the following description is made with reference to the accompanying drawings, and in this embodiment, a touch sheet is disposed on a surface of a housing contacting with an ear.

Please refer to fig. 2-3, the present invention relates to an earphone circuit using bluetooth earphone, which comprises a bluetooth chip U1 with model AB1536, and further comprises a control circuit, wherein the control circuit comprises a second ESD device D2 and a touch pad, and the H7 pin of the bluetooth chip U1 is electrically connected to ground and the touch pad through the second ESD device D2.

The utility model discloses a theory of use as follows:

when the Bluetooth headset is worn, the touch sheet can be in contact with epidermis tissues in the ear to form touch signals, the signals are transmitted to the Bluetooth chip U1 through the circuit, the audio data are played after the signals are analyzed through the Bluetooth chip U1, in addition, when the headset is taken down, the touch sheet is separated from the epidermis tissues in the ear, the touch signals disappear, at the moment, the Bluetooth chip U1 cannot receive the touch signals, and therefore the audio data are paused.

Furthermore, the control circuit further comprises a touch sheet resistor R3 and a touch sheet capacitor C34, wherein a pin H7 of the Bluetooth chip U1 is connected with a second ESD device D2 and a touch sheet through the touch sheet resistor R3, a second ESD device D2 is connected with the touch sheet capacitor C34, and a pin H7 of the Bluetooth chip U1 is grounded through the touch sheet capacitor C34; with the adoption of the scheme, the purposes of the touch sheet resistor R3 and the touch sheet capacitor C3 are to reduce the current entering the Bluetooth chip U1 and filter the current flowing into the Bluetooth chip U1.

Referring to fig. 4, further, a charging circuit is included, the charging circuit includes a first ESD device D1, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a fourteenth resistor R14, a fifteenth resistor R15, a third fet Q3, and a fourth fet Q4, the pin a5 of the bluetooth chip U1 is connected to the drain of the third fet Q3 through the first ESD device D1 of the third fet Q3, the source of the third fet Q3 is connected to the first ESD device D1, the ninth resistor R9, the eleventh resistor R9, and the tenth resistor R9, the tenth resistor R9 is connected to the gate of the third fet Q9, the eleventh resistor R9 is connected to the fifteenth resistor R9, the first ESD device D9, the ninth resistor R9, the fourteenth resistor R9, and the drain of the fourth fet Q9 are connected to the drain of the fourth fet Q9, the source of the fourth field effect transistor is grounded, the grid of the fourth field effect transistor is connected with an H11 pin of a Bluetooth chip U1 and a fifteenth resistor R15, and the fourteenth resistor R14 is also connected with an H6 pin of the Bluetooth chip U1;

as shown in fig. 5, in this embodiment, the BATTERY charger further includes a BATTERY charger and a chip U4, the chip U4 is XB609212, the chip U4 functions to protect the BATTERY charger, and the charging circuit is designed to output a stable current, so that the BATTERY charger is charged by the current, which is beneficial to prolonging the service life of the BATTERY charger.

As shown in fig. 6, the MIC circuit further includes a MIC circuit, where the MIC circuit includes a 3722F type microphone J1, a thirty-third capacitor C33, and a thirty-second capacitor C32, a pin C2 of the bluetooth chip U1 is connected to a pin 1 of the microphone J1 and a pin C32 of the thirty-second capacitor, the thirty-second capacitor C32 is further connected to ground, a pin 2 and a pin 3 of the microphone J1 are both connected to a pin E3 of the bluetooth chip U1, a pin 4 of the microphone J1 is connected to the thirty-third capacitor C33 and a pin E3 of the bluetooth chip U1, and the thirty-third capacitor C33 is connected to ground.

As shown in fig. 7, the bluetooth chip further includes a reset circuit, where the reset circuit includes a first triode Q1, a second triode Q2, a twenty-fifth capacitor C25, a twenty-sixth capacitor C26, a fifth resistor R5, and a seventh resistor R7, a pin a5 of the bluetooth chip U1 is connected to a base of a twenty-sixth capacitor C26, a fifth resistor R5, and a first triode Q1 through a twenty-fifth capacitor C25, a collector of the first triode Q1 is connected to a pin a4 of the bluetooth chip U1, an emitter of the first triode Q1 is connected to a collector of the second triode Q2, a pin B7 of the bluetooth chip U1 is connected to a base of the second triode Q2 through a seventh resistor R7, and an emitter of the second triode Q2 is grounded; specifically, the phenomenon that the Bluetooth chip U1 is crashed due to data confusion in the charging process can be avoided through the reset circuit.

In this embodiment, the speaker circuit is further included, and the speaker circuit is composed of a sixth inductor L6, a seventh inductor L7, a twenty-seventh capacitor C27, and a twenty-eighth capacitor C28.

The above circuits are all provided with specific models, and the chips are prior art, so the description of the circuits is not further explained.

Claims

1. The utility model provides an ear detection circuitry is gone into to bluetooth headset, includes that the model is AB 1536's bluetooth chip U1, its characterized in that still includes control circuit, control circuit includes second ESD device D2, touch-sensitive strip, bluetooth chip U1's H7 pin passes through second ESD device D2 and ground, touch-sensitive strip electric connection.

2. The circuit for detecting the entrance of the bluetooth headset into the ear of claim 1, wherein the control circuit further comprises a touch sheet resistor R3 and a touch sheet capacitor C34, the pin H7 of the bluetooth chip U1 is connected to the second ESD device D2 and the touch sheet through the touch sheet resistor R3, the second ESD device D2 is connected to the touch sheet capacitor C34, and the pin H7 of the bluetooth chip U1 is further grounded through the touch sheet capacitor C34.

3. The bluetooth headset ear-entering detection circuit according to claim 1, further comprising a charging circuit, wherein the charging circuit comprises a first ESD device D1, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a fourteenth resistor R14, a fifteenth resistor R15, a third fet Q3, and a fourth fet Q4, the pin a5 of the bluetooth chip U1 is connected to the drain of the third fet Q3 through the first ESD device D1 of the third fet Q3, the source of the third fet Q3 is connected to the first ESD device D1, the ninth resistor R9, the eleventh resistor R9, and the tenth resistor R9, the tenth resistor R9 is connected to the gate of the third fet Q9, the eleventh resistor R9 is connected to the fifteenth ESD R9, the first ESD device D9, the ninth resistor R9, the fourteenth resistor R9, and the fourth fet Q9 are further connected to the drain of the fourth fet 9, the source of the fourth field effect transistor is grounded, the grid of the fourth field effect transistor is connected with the H11 pin of the Bluetooth chip U1 and the fifteenth resistor R15, and the fourteenth resistor R14 is also connected with the H6 pin of the Bluetooth chip U1.

4. The circuit as claimed in claim 1, further comprising a MIC circuit, wherein the MIC circuit comprises a type 3722F microphone J1, a thirty-third capacitor C33, and a thirty-second capacitor C32, pin C2 of bluetooth chip U1 is connected to pin 1 of microphone J1 and pin C32 of thirty-second capacitor C32, pin 2 and pin 3 of microphone J1 are connected to pin E3 of bluetooth chip U1, pin 4 of microphone J1 is connected to pin C33 of thirty-third capacitor C33 and pin E3 of bluetooth chip U1, and pin C33 of thirty-third capacitor C33 is connected to ground.

5. The circuit of claim 1, further comprising a reset circuit, wherein the reset circuit comprises a first transistor Q1, a second transistor Q2, a twenty-fifth capacitor C25, a twenty-sixth capacitor C26, a fifth resistor R5, and a seventh resistor R7, a pin A5 of the bluetooth chip U1 is connected to the bases of the twenty-sixth capacitor C26, the fifth resistor R5, and the first transistor Q1 through the twenty-fifth capacitor C25, a collector of the first transistor Q1 is connected to a4 pin of the bluetooth chip U1, an emitter of the first transistor Q1 is connected to a collector of the second transistor Q2, a pin B7 of the bluetooth chip U1 is connected to a base of the second transistor Q2 through the seventh resistor R7, and an emitter of the second transistor Q2 is grounded.