CN215268723U

CN215268723U - Circuit for Bluetooth headset production test

Info

Publication number: CN215268723U
Application number: CN202121145342.4U
Authority: CN
Inventors: 简泽钦; 谢军
Original assignee: Shenzhen Lanfeng Shidai Industrial Co ltd
Current assignee: Shenzhen Lanfeng Shidai Industrial Co ltd
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2021-12-21
Anticipated expiration: 2031-05-26

Abstract

The utility model discloses a circuit for bluetooth headset production test, this circuit include central control module, on-off control module, button module, earphone interface and power module, and on-off control module's control end is connected with central control module, and button module is connected with central control module, with earphone interface connection on-off control module, power module is used for the power supply. The utility model discloses a simple button of special design's control switch module cooperation and LED show, have simplified the test operation process greatly, improve efficiency of software testing, and simple and easy operation more simultaneously, the suitability is stronger.

Description

Circuit for Bluetooth headset production test

Technical Field

The utility model discloses a circuit for bluetooth headset production test belongs to consumer electronics production facility technical field.

Background

The Bluetooth earphone applies the Bluetooth technology to the hands-free earphone, so that users can avoid annoying wiring stumbling and can easily talk in various ways. Since the advent of bluetooth headsets, it has been a good tool for the mobile commerce industry to increase efficiency. With the continuous development and progress of bluetooth headsets, the conventional bluetooth headset is gradually replaced by a true wireless bluetooth headset (i.e., TWS).

Bluetooth headset before dispatching from the factory, all need test, if: clearing pairing for the earphone, enabling the earphone to enter TWS pairing, resetting earphone records and the like. The Bluetooth headset production testing device in the prior art is complex in structure and inconvenient to operate, and operation and identification are inconvenient for operators with less experience.

Disclosure of Invention

To the bluetooth headset testing arrangement among the above-mentioned prior art complicated structure, the inconvenient shortcoming of operation, the utility model provides a circuit for bluetooth headset production test, it shows through simple button of special design's control switch module cooperation and LED, has simplified test operation process greatly.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a circuit for bluetooth headset production test, this circuit includes central control module, on-off control module, button module, earphone interface and power module, and on-off control module's control end is connected with central control module, and button module is connected with central control module, with earphone interface connection on-off control module, power module is used for the power supply.

The utility model provides a technical scheme that its technical problem adopted further still includes:

the switch control module comprises a first switch module, a second switch module, an auxiliary switch module and a channel switch, wherein the first switch module is connected between the control ends of the auxiliary switch module and the channel switch and the ground, the control end of the first switch module is connected with a first enabling switch signal input end, the channel switch is connected between a power supply module and an earphone interface, the control end of the channel switch is connected with the first switch module, the channel switch is connected with a divider resistor in parallel connection with the channel switch, the auxiliary switch module is connected between the earphone interface and the ground, the control end of the auxiliary switch module is connected with the first switch module, the second switch module is connected between the earphone interface and the ground, and the control end of the second switch module is connected with a second enabling switch signal input end.

The first switch module adopts an NMOS tube Q2, the G pole of an NMOS tube Q2 is connected with a signal input end of a first enabling switch through a current-limiting resistor R7, the S pole of the NMOS tube Q2 is grounded, the D pole of an NMOS tube Q2 is connected with an auxiliary switch module and a control end of a channel switch, the channel switch adopts a PMOS tube Q1, the G pole of a PMOS tube Q1 is connected with the D pole of an NMOS tube Q2, the S pole of a PMOS tube Q1 is connected with an output end of a power supply module, the D pole of a PMOS tube Q VO 1 is connected with an earphone interface TP3, a first voltage-dividing resistor R20 is connected with the PMOS tube Q1 in parallel, the auxiliary switch module adopts an NMOS tube Q3, the G pole of the NMOS tube Q3 is connected with the D pole of an NMOS tube Q2, the S pole of an NMOS tube Q3 is grounded, the D pole of an NMOS tube Q3 is connected with the earphone interface TP3 through a second voltage-dividing resistor R21 in series connection, the second switch module adopts an NMOS tube Q4, the G pole of the NMOS tube Q4 is connected with the second enabling switch signal input end EN3 through a current-limiting resistor R10, the S pole of the NMOS tube Q4 is grounded, and the D pole of the NMOS tube Q4 is connected with the earphone interface through a current-limiting resistor R5.

The key module adopts three key switches which are respectively connected with an I/O port of the central control module.

And the central control module is connected with an LED indicating module.

The central control module is connected with a temperature detection module.

The central control module is connected with a control access module, the control access module comprises a triode Q5, a third voltage-dividing resistor R25, a fourth voltage-dividing resistor R28 and a current-limiting resistor R19, the third voltage-dividing resistor R25 and the fourth voltage-dividing resistor R28 are connected between a +5V power supply and the ground in series, one end of the current-limiting resistor R19 is connected with the common end of the third voltage-dividing resistor R25 and the fourth voltage-dividing resistor R28, the other end of the current-limiting resistor R19 is connected with the control end of the power supply module, a collector and an emitter of the triode Q5 are connected with two ends of the third voltage-dividing resistor R25 in parallel, and the base of the triode Q5 is connected with an I/O port of the MCU chip U4.

The central control module is also connected with a Hall module, and the Hall module is connected to an I/O port of the central control module and is used for transmitting Hall detection information to the central control module.

The power module comprises a USB interface, an overcurrent and overvoltage protection module, a boosting module and a lithium battery, the USB interface is connected with the overcurrent and overvoltage protection module, the overcurrent and overvoltage protection module outputs power to the boosting module, and the power is boosted by the boosting module and then output to the lithium battery for power supply.

The utility model has the advantages that: the utility model discloses a simple button of special design's control switch module cooperation and LED show, have simplified the test operation process greatly, improve efficiency of software testing, and simple and easy operation more simultaneously, the suitability is stronger.

The present invention will be further described with reference to the accompanying drawings and the detailed description.

Drawings

Fig. 1 is a block diagram of the circuit of the present invention.

Fig. 2 is a circuit block diagram of the control switch module of the present invention.

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

Fig. 4 is a schematic diagram of a power input interface part according to the present invention.

Fig. 5 is a schematic circuit diagram of a part of the overvoltage and overcurrent protection module of the present invention.

Fig. 6 is a schematic circuit diagram of a part of the boost module of the present invention.

Fig. 7 is a schematic circuit diagram of a part of the switch control module of the present invention.

Fig. 8 is a schematic circuit diagram of a part of the temperature detection module of the present invention.

Fig. 9 is a schematic circuit diagram of a part of the access identification module of the present invention.

Fig. 10 is a schematic circuit diagram of a part of the central control module according to the present invention.

Fig. 11 is a schematic circuit diagram of a part of the LED indicating module of the present invention.

Fig. 12 is a schematic circuit diagram of a part of the hall module of the present invention.

Fig. 13 is a schematic circuit diagram of a part of the key module of the present invention.

Fig. 14 is a schematic circuit diagram of an interface part according to the present invention.

Detailed Description

The embodiment is a preferred embodiment of the present invention, and other principles and basic structures are the same as or similar to those of the embodiment, and are within the protection scope of the present invention.

Please refer to fig. 1 to 14 in combination, the novel earphone mainly comprises a central control module, a switch control module, a key module, an earphone interface and a power module, wherein a control end of the switch control module is connected with the central control module, the central control module outputs a control signal to the switch control module, the key module is connected with the central control module and used for inputting key information to the central control module, the earphone interface is connected to the switch control module and used for inputting information output by the switch control module into an earphone, and the power module is used for supplying power.

Please refer to fig. 2 and 7, in this embodiment, the switch control module includes a first switch module, a second switch module, an auxiliary switch module and a channel switch, the first switch module is connected between the auxiliary switch module and the control end of the channel switch and the ground, the control end of the first switch module is connected to the signal input end of the first enable switch, the first switch module is controlled to operate by the first enable switch signal, the auxiliary switch module and the channel switch are controlled to operate by the first switch module, the channel switch is connected between the power module and the earphone interface, the control end of the channel switch is connected to the first switch module, a divider resistor is connected in parallel with the channel switch, the auxiliary switch module is connected between the earphone interface and the ground, the control end of the auxiliary switch module is connected to the first switch module, the second switch module is connected between the earphone interface and the ground, and the control end of the second switch module is connected with the signal input end of the second enabling switch. In this embodiment, the first enable switch signal input terminal (EN 2) and the second enable switch signal input terminal (EN 3) are respectively an I/O port of the central control module and are configured to output a control signal, the first switch module employs an NMOS transistor Q2, a G electrode of the NMOS transistor Q2 is connected to the first enable switch signal input terminal EN2 through a current-limiting resistor R7, an S electrode of the NMOS transistor Q2 is grounded, a D electrode of the NMOS transistor Q2 is connected to the auxiliary switch module and a control terminal of the channel switch, the channel switch employs a PMOS transistor Q1, a G electrode of the PMOS transistor Q1 is connected to the D electrode of the NMOS transistor Q2, an S electrode of the PMOS transistor Q1 is connected to an output terminal VO of the power module, a D electrode of the PMOS transistor Q1 is connected to an earphone interface TP3, and a first voltage divider resistor R20 is connected in parallel to the PMOS transistor Q1, that is one end of the first voltage divider resistor R20 is connected to the S electrode of the PMOS transistor Q1, the other end of the first voltage-dividing resistor R20 is connected to the D pole of the PMOS transistor Q1, the auxiliary switch module adopts an NMOS transistor Q3, the G pole of the NMOS transistor Q3 is connected to the D pole of the NMOS transistor Q2, the S pole of the NMOS transistor Q3 is grounded, the D pole of the NMOS transistor Q3 is connected to the earphone interface TP3 through a second voltage-dividing resistor R21 connected in series, in this embodiment, the resistance values of the first voltage-dividing resistor R20 and the second voltage-dividing resistor R21 are the same, in this embodiment, the second switch module adopts an NMOS transistor Q4, the G pole of the NMOS transistor Q4 is connected to the second enable switch signal input terminal EN3 through a current-limiting resistor R10, the S pole of the NMOS transistor Q4 is grounded, and the D pole of the NMOS transistor Q4 is connected to the earphone interface TP3 through a current-limiting resistor R5.

In this embodiment, central control module adopts small-size MCU chip U4, has conventional data processing and drive function, the utility model discloses in do not too much restriction to MCU chip U4's model, the common MCU that can satisfy drive and data processing ability on the market is all can.

In this embodiment, the KEY module employs three KEY switches, which are respectively connected to the I/O ports of the MCU chip U4, i.e., SID _ KEY2, and SID _ KEY3, and the KEY switches can be defined by connection pins.

In this embodiment, the central control module is further connected with an LED indication module, the LED indication module adopts four LED lamps, and the LED indication module is connected to an I/O port of the MCU chip U4.

In this embodiment, still be connected with temperature detection module on the central control module, temperature detection module adopts thermistor for detect battery temperature, prevent to cause the damage because of the high temperature to the battery.

IN this embodiment, the central control module is further connected with a control access module, which includes a transistor Q5, a third voltage dividing resistor R25, a fourth voltage dividing resistor R28 and a current limiting resistor R19, the third voltage dividing resistor R25 and the fourth voltage dividing resistor R28 are connected IN series between the +5V power supply and the ground, one end of the current limiting resistor R19 is connected to a common terminal of the third voltage dividing resistor R25 and the fourth voltage dividing resistor R28, the other end of the current limiting resistor R19 (i.e. the USB _ IN interface) is connected to a control terminal of the power supply module, a collector and an emitter of the transistor Q5 are connected IN parallel to two ends of the third voltage dividing resistor R25, a base of the transistor Q5 is connected to an I/O port of the MCU chip U4, the transistor Q5 is controlled to be turned on through the I/O port of the MCU chip U4, when the transistor Q5 is turned on, the third voltage dividing resistor R25 is short-circuited, so as to change the potential of the USB _ IN interface, and then the power module is controlled to work.

In this embodiment, the central control module is further connected with a hall module, and the hall module is connected to an I/O port of the central control module and is configured to transmit hall detection information to the central control module.

In this embodiment, the power adopts the lithium cell, during concrete implementation, also can adopt realization such as external power supply, and power module includes the USB interface, overflows excessive pressure protection module, step up module and lithium cell, and the USB interface is connected with overflowing excessive pressure protection module for input external power supply through the USB interface and give the utility model discloses the power supply, USB interface input power is through flowing through excessive pressure protection module protection, in order to prevent because excessive pressure or overflow right the utility model discloses cause the damage, overflow excessive pressure protection module output power gives the step up module, exports for the lithium cell power supply after the step up module steps up, can give the earphone power supply simultaneously. In this embodiment, when there is no external power supply, the lithium battery supplies power to the earphone through the overcurrent and overvoltage protection module and the voltage boosting module.

The utility model discloses be fit for the equipment factory when the test of production bluetooth headset, clear away for the earphone pair, the earphone gets into TWS pairs, resets three kinds of functional requirements of earphone record. The utility model discloses when using, the following of basic function:

(1) when the SID _ KEY KEY is pressed, a pin II (an I/O port) of the MCU pulls up an EN2 potential to enable an NMOS tube Q2 to enter a conducting state, an NMOS tube Q2 pulls down a G electrode level of a PMOS tube Q1 in the conducting state to enable the PMOS tube Q1 to be in the conducting state, a +5V high-level signal passes through the PMOS tube Q1, when the pin II of the MCU outputs a low level, the PMOS tube Q1 is cut off, the NMOS tube Q3 is conducted, a resistor R20 and a resistor R21 are connected between a +5V power supply and the ground in series, the +5V high-level signal is changed into a +2.5V level signal, after a specific time of 1.4S, a high-level signal is output by a pin III of the MCU, the 5V high-level signal passing through the PMOS tube Q1 is completely pulled down to the low-level signal, and a signal waveform formed at the moment is transmitted to an earphone terminal for identification, and making corresponding judgment after the earphone terminal is identified. In order to enable production line workers in a factory to better identify the operation in the state, when the KEY 1 (namely the SID _ KEY KEY) is pressed, after the MCU identifies the operation, the MCU sends signals to the LED through the No. 5 pin (MCU general I/O port), the No. 6 pin (MCU general I/O port) and the No. 7 pin (MCU general I/O port), so that the LED1, the LED2 and the LED3 signal lamps are turned on, are turned on for 0.5s and are flickered for 3 times, and the pairing prompt is determined to be cleared for the earphone.

(2) When the SID _ KEY2 KEY is pressed, the MCU identifies the switch signal and outputs a high-level signal to light the LED1, the LED2 and the LED3, so that the production line worker identification signal of a factory is facilitated. Meanwhile, the pin II of the MCU outputs high level, the high level output by EN2 makes the NMOS transistor Q2 in a conducting state, the NMOS transistor Q2 conducts the level of the G pole of the pull-down PMOS transistor Q1, the PMOS tube Q1 is conducted, a +5V high-level signal passes through the end of a PMOS tube Q1, the MCU sends an instruction after a specific time of 0.4S, a third pin of the MCU outputs a high level, the high-level signal output by EN3 enables an NMOS tube Q4 to be conducted, the NMOS tube Q4 is conducted to pull down the +5V high-level signal passing through the PMOS tube Q1, the MCU completely outputs a high level after 2S enables the high-level +5V signal passing through the PMOS tube Q1 to be pulled down into a low level completely, a specific waveform signal is formed and transmitted to an earphone end, the earphone end identifies the specific waveform signal and then performs specific instruction operation, and the earphone enters TWS pairing.

(3) And when the KEY SID _ KEY3 is pressed, the MCU identifies a switch signal and outputs a high-level signal to light the LED1, the LED2 and the LED3, so that the production line worker identification signal of a factory is facilitated. Meanwhile, the pin II of the MCU outputs high level, the high level output by EN2 makes the NMOS transistor Q2 in a conducting state, the NMOS transistor Q2 conducts the level of the G pole of the pull-down PMOS transistor Q1, the PMOS tube Q1 is conducted, a +5V high-level signal passes through the end of a PMOS tube Q1, the MCU sends an instruction after a specific time is 0.4S, a pin III of the MCU outputs a high level, the high-level signal output by EN3 enables an NMOS tube Q4 to be conducted, the NMOS tube Q4 is conducted to pull down the +5V high-level signal passing through the PMOS tube Q1, the MCU completely outputs a high level after the signal passes through 1S, the high-level +5V signal passing through the PMOS tube Q1 is completely pulled down to a low level, a specific waveform signal is formed and transmitted to an earphone end, the earphone end identifies the specific waveform signal and then performs a specific instruction operation, and the earphone enters earphone resetting operation.

The utility model discloses a simple button of special design's control switch module cooperation and LED show, have simplified the test operation process greatly, improve efficiency of software testing, and simple and easy operation more simultaneously, the suitability is stronger.

Claims

1. The utility model provides a circuit for bluetooth headset production test which characterized by: the circuit comprises a central control module, a switch control module, a key module, an earphone interface and a power module, wherein the control end of the switch control module is connected with the central control module, the key module is connected with the central control module, the earphone interface is connected to the switch control module, the power module is used for supplying power, the switch control module comprises a first switch module, a second switch module, an auxiliary switch module and a channel switch, the first switch module is connected between the auxiliary switch module and the control end of the channel switch and the ground, the control end of the first switch module is connected with a first enabling switch signal input end, the channel switch is connected between the power module and the earphone interface, the control end of the channel switch is connected with the first switch module, a divider resistor is connected with the channel switch in parallel, and the auxiliary switch module is connected between the earphone interface and the ground, the control end of the auxiliary switch module is connected with the first switch module, the second switch module is connected between the earphone interface and the ground, and the control end of the second switch module is connected with the second enabling switch signal input end.

2. The circuit for bluetooth headset production testing of claim 1, wherein: the first switch module adopts an NMOS tube Q2, a G pole of an NMOS tube Q2 is connected with a signal input end of a first enabling switch through a current limiting resistor R7, an S pole of the NMOS tube Q2 is grounded, a D pole of an NMOS tube Q2 is connected with an auxiliary switch module and a control end of a channel switch, the channel switch adopts a PMOS tube Q1, the G pole of the PMOS tube Q1 is connected with a D pole of an NMOS tube Q2, the S pole of the PMOS tube Q1 is connected with an output end of a power supply module, the D pole of a PMOS tube Q1 is connected with an earphone interface TP3, the auxiliary switch module adopts an NMOS tube Q3, the G pole of the NMOS tube Q3 is connected with the D pole of the NMOS tube Q2, the S pole of the NMOS tube Q3 is grounded, the D pole of the NMOS tube Q3 is connected with the earphone interface TP3 through a second voltage dividing resistor R21 connected in series, the second switch module adopts an NMOS tube Q2, the G pole of the NMOS tube Q6356 is connected with an EN switch signal input end 8653 through a current limiting resistor R828653, the S pole of the NMOS tube Q4 is grounded, and the D pole of the NMOS tube Q4 is connected with the earphone interface through a current limiting resistor R5.

3. The circuit for bluetooth headset production testing of claim 1, wherein: the key module adopts three key switches which are respectively connected with an I/O port of the central control module.

4. The circuit for bluetooth headset production testing of claim 1, wherein: and the central control module is connected with an LED indicating module.

5. The circuit for bluetooth headset production testing of claim 1, wherein: the central control module is connected with a temperature detection module.

6. The circuit for bluetooth headset production testing of claim 1, wherein: the central control module is connected with a control access module, the control access module comprises a triode Q5, a third voltage-dividing resistor R25, a fourth voltage-dividing resistor R28 and a current-limiting resistor R19, the third voltage-dividing resistor R25 and the fourth voltage-dividing resistor R28 are connected between a +5V power supply and the ground in series, one end of the current-limiting resistor R19 is connected with the common end of the third voltage-dividing resistor R25 and the fourth voltage-dividing resistor R28, the other end of the current-limiting resistor R19 is connected with the control end of the power supply module, a collector and an emitter of the triode Q5 are connected with two ends of the third voltage-dividing resistor R25 in parallel, and the base of the triode Q5 is connected with an I/O port of the MCU chip U4.

7. The circuit for bluetooth headset production testing of claim 1, wherein: the central control module is also connected with a Hall module, and the Hall module is connected to an I/O port of the central control module and is used for transmitting Hall detection information to the central control module.

8. The circuit for bluetooth headset production testing of claim 1, wherein: the power module comprises a USB interface, an overcurrent and overvoltage protection module, a boosting module and a lithium battery, the USB interface is connected with the overcurrent and overvoltage protection module, the overcurrent and overvoltage protection module outputs power to the boosting module, and the power is boosted by the boosting module and then output to the lithium battery for power supply.