TWS earphone with sound box function

Abstract

The utility model discloses a TWS earphone with a sound box function, and relates to the technical field of earphones. The earphone comprises an earphone body and a charging box, the earphone body is provided with a Bluetooth chip, a first single-pole double-throw switch and an earphone charging terminal, and the Bluetooth chip comprises an audio interface, a first charging interface, a Bluetooth chip IO interface and a touch detection TOUCH port; and the touch detection TOUCH port controls the earphone to realize switching between an audio playing mode and a charging waiting mode. The charging box is provided with a charging bin, a charging circuit is arranged in the charging bin, and the charging circuit comprises a charging IC, a loudspeaker, a power amplifier IC, a second single-pole double-throw switch and a box charging terminal; the charging IC comprises a key switch, a second charging interface and a box IO interface, and the second single-pole double-throw switch is connected with a box charging terminal; the key switch is used for controlling the charging box to realize switching between a sound box mode and a charging mode; when the earphone is placed in the charging box, the earphone charging terminal is connected with the box charging terminal. The TWS earphone can be used as a sound box under the condition of meeting the functions of the existing TWS earphone, and is convenient to carry.

Description

Technical Field

[0001] The utility model of the present application relates to the technical field of earphones, and particularly relates to a TWS earphone with a speaker function. Background Art

[0002] As an accessory of terminal products such as mobile phones, tablets, and computers, TWS true wireless earphones have become one of the consumer electronic products commonly used in daily life at home and long-distance travel. Generally, the TWS earphones on the market at present include earphones and a charging case. The earphones are worn to connect to a mobile phone to play audio for listening, and the charging case is used to charge the earphones.

[0003] In real life, due to their small size, light weight, and portability, TWS earphones have become essential electronic products for people going out. Currently, TWS earphones only support users wearing the earphones to connect to a mobile phone to play audio and only meet personal use. Existing speakers generally have a large volume and are not easy to carry, and usually speakers are only limited to use at home. Thus, when people want to use a speaker during a gathering outside, it will be very inconvenient if there is only a TWS earphone but no speaker. Summary of the Utility Model

[0004] In view of this, the purpose of the embodiment of the utility model of the present application is to provide a TWS earphone with a speaker function, which can also be used as a speaker while satisfying the functions of existing TWS earphones, so as to achieve the scenario where both TWS earphones and speakers can be used outside, and it is also convenient to carry.

[0005] The technical solutions adopted by the present utility model to solve the above technical problems are as follows:

[0006] According to one aspect of the embodiment of the present utility model, a TWS earphone with a speaker function is provided, including an earphone and a charging case. The earphone is provided with a Bluetooth chip, a first single-pole double-throw switch, and an earphone charging terminal. The Bluetooth chip includes an audio interface, a first charging interface, a Bluetooth chip IO interface, and a touch detection TOUCH port. The first single-pole double-throw switch controls the output of the audio signal of the audio interface and the input of the charging signal of the first charging interface by receiving the signal output by the Bluetooth chip IO interface, thereby realizing the switching between two signals, namely the output of the audio signal and the input of the charging signal; the touch detection TOUCH port realizes the switching of two modes of the earphone, and the two modes are: the audio external playback mode and the waiting for charging mode;

[0007] The charging case has a charging bin, and a charging circuit is arranged in the charging bin. The charging circuit includes a charging IC, a speaker, a power amplifier IC, a second single-pole double-throw switch, and a box charging terminal. The charging IC includes a key switch, a second charging interface, and a box IO interface. The second single-pole double-throw switch receives the signal output by the box IO interface to control the output of the charging signal of the second charging interface of the charging IC and the input of the power amplifier IC signal. The power amplifier IC is connected to the speaker, and the second single-pole double-throw switch is connected to the box charging terminal. The key switch realizes the switching between two modes of the charging case, and the two modes are: speaker mode and charging mode.

[0008] When the earphone is placed in the charging case, the Bluetooth earphone charging terminal is connected to the box charging terminal.

[0009] Among them, the first single-pole double-throw switch is an analog switch U3. The NO1 / NO2 pins of the analog switch U3 are respectively connected to the audio signal output pins SPEAK_L+ / SPEAK_L- of the Bluetooth chip. The NC1 / NC2 pins of the analog switch U3 are respectively connected to 5V_L+ / 5V_L- of the Bluetooth chip. The IN1 / IN2 pins of the analog switch U3 are connected to the CONTROL_1 pin of the Bluetooth chip through a resistor R183.

[0010] Among them, a protection resistor R182 is connected in series between the VCC pin of the analog switch U3 and an external power supply, and is grounded through a connecting capacitor C116. The COM1 / COM2 interfaces of the analog switch U3 are respectively connected to the earphone charging terminals OUT5V_L+ / OUT5V_L through resistors.

[0011] Among them, IN1 and IN2 of the analog switch U3 are connected in parallel to form a CONTROL_1 network for control, and the CONTROL_1 network is connected to the Bluetooth chip IO port. When a specific action is recognized by the touch detection TOUCH port of the Bluetooth chip, the Bluetooth chip IO interface will output a high level greater than 1.3V to the analog switch U3 through the CONTROL_1 network, controlling the connection between SPEAK_L+ / SPEAK_L- of the analog switch U3 and OUT5V_L+ / OUT5V_L- of the earphone charging terminal, and the earphone is in the audio external playback mode.

[0012] Among them, when a specific action is not recognized by the touch detection TOUCH port of the Bluetooth chip, the Bluetooth chip IO port will default to output a voltage less than 0.5V to the analog switch U3 through the CONTROL_1 network, controlling the connection between 5V_L+ / 5V_L- of the analog switch U3 and OUT5V_L+ / OUT5V_L- of the earphone charging terminal, and the earphone is in the waiting charging mode.

[0013] Among them, the further second single-pole double-throw switch is analog switch U8, and the analog switch U8 has the same structure as analog switch U3.

[0014] Among them, the outputs VOUT_5V / 5V-_L of the charging IC are respectively connected to the NC1 / NC2 pins of the analog switch U8, the audio input pins LOUT_P / LOUT_N of the power amplifier IC are respectively connected to the NO1 / NO2 pins of the analog switch U8, and the IO1 port of the charging IC is connected to IN1 and IN2 of the analog switch U8. The network CONTROL_3 control pin is formed by combining the control of IN1 and IN2.

[0015] Among them, when the charging case receives a specific key operation of the switch key, the key port of the charging IC recognizes the specific operation. The IO1 port of the charging IC outputs a voltage greater than 1.3V to the analog switch U8 through the network CONTROL_3 control pin, controlling to connect the LOUT_P / LOUT_N pins to the OUT5V_L+ / OUT5V_L- of the headphone charging terminal, and the charging bin is in the speaker mode.

[0016] Among them, the specific key operation of the switch key can define the specific operation and operation time by itself.

[0017] Among them, when the network CONTROL_3 control pin outputs a voltage less than 0.5V to the analog switch U8, it controls to connect VOUT_5V / 5V-_L- of the analog switch U8 to the OUT5V_L+ / OUT5V_L- of the headphone charging terminal, and the charging bin is in the charging mode.

[0018] Regarding the problems of the existing TWS earphones with single functions and large speaker volumes that are inconvenient to carry, the TWS earphones with speaker functions in the embodiments of the present application receive the signal output from the IO interface of the Bluetooth chip through a first single-pole double-throw switch to control the output of the audio signal of the audio interface and the input of the charging signal of the first charging interface, and the TOUCH port of the touch detection realizes the switching between two modes of controlling the audio external playback mode and the waiting charging mode of the earphones; the second single-pole double-throw switch receives the signal output from the IO interface of the box to control the output of the charging signal of the second charging interface of the charging IC and the input of the power amplifier IC signal, and the power amplifier IC is connected to the speaker, and the second single-pole double-throw switch is connected to the charging terminal of the box; the key switch realizes the switching between two modes of controlling the speaker mode and the charging mode of the charging box. When the earphones are in the audio external playback mode and the charging bin is in the speaker mode, the audio output signal of the earphones can be output to the charging bin, and the sound is amplified by the power amplifier IC of the charging bin. In this way, the entire TWS earphones become a speaker. Thus, the TWS earphones with speaker functions in the embodiments of the present application can be used as a speaker while meeting the functions of the existing TWS earphones, so as to achieve the scenario where the TWS earphones and the speaker can be used outside, and they are small in size and convenient to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 is a schematic structural diagram of a TWS earphone with speaker functions according to an embodiment of the present invention;

[0021] Figure 2 is a schematic circuit diagram of the earphone part of a TWS earphone with speaker functions according to an embodiment of the present invention;

[0022] Figure 3 is a schematic circuit diagram of the charging box part of a TWS earphone with speaker functions according to an embodiment of the present invention;

[0023] Figure 4 is a schematic circuit diagram of the power amplifier IC of a TWS earphone with speaker functions according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the following further details the present utility model in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not used to limit the present utility model.

[0025] Please refer to Figures 1 to 3 , which is a schematic structural diagram of a TWS earphone with a speaker function provided by an embodiment of the present utility model. For the sake of convenience of description, only the parts related to this embodiment are shown.

[0026] Embodiment 1

[0027] Please see Figures 1 to 4 As shown, an embodiment of the present application provides a TWS earphone with a speaker function, including an earphone 10 and a charging case 20. The earphone 10 is divided into a left earphone and a right earphone, and the left earphone and the right earphone have the same circuit structure. Each earphone 10 is provided with a Bluetooth chip 11, a first single-pole double-throw switch 12 and an earphone charging terminal 13. The Bluetooth chip 11 includes an audio interface 111, a first charging interface 112, a Bluetooth chip IO interface 113 and a touch detection TOUCH port 114. The first single-pole double-throw switch 12 controls the output of the audio signal of the audio interface 111 and the input of the charging signal of the first charging interface 112 by receiving the signal output by the Bluetooth chip IO interface 113, so as to realize the switching between two signals, namely the output of the audio signal and the input of the charging signal; the touch detection TOUCH port 114 realizes the control of the switching between two modes of the earphone, and the two modes are: the audio external playback mode and the waiting charging mode.

[0028] The charging case is divided into a left ear charging case and a right ear charging case, and the charging circuits of the left and right ear charging cases are the same. The charging case 20 has a charging chamber, and a charging circuit is arranged in the charging chamber. The charging circuit includes a charging IC 21, a speaker 22, a power amplifier IC 23, a second single-pole double-throw switch 24 and a box charging terminal 25; the charging IC 21 includes a key switch 211, a second charging interface 212 and a box IO interface 213. The second single-pole double-throw switch 24 receives the signal output by the box IO interface 213 to control the output of the charging signal of the second charging interface 212 of the charging IC 21 and the input of the signal of the power amplifier IC 23. The power amplifier IC 23 is connected to the speaker 22, and the second single-pole double-throw switch 24 is connected to the box charging terminal 25; the key switch 211 realizes the control of the switching between two modes of the charging case, and the two modes are: the speaker mode and the charging mode;

[0029] When the earphone is placed in the charging case, the charging terminal of the Bluetooth earphone is connected to the charging terminal of the case. In the embodiment of the present application, the earphone charging terminal is the Pogopin thimble of the earphone. The charging terminal of the case is the Pogopin thimble of the charging case.

[0030] In this embodiment, before the earphone is placed in the charging bin of the charging case, the touch detection TOUCH port 114 can be used to control the earphone to switch between two modes: the audio external playback mode and the waiting for charging mode; after the earphone is put into the bin, the Pogopin thimble of the earphone is connected to the Pogopin thimble of the charging bin. At this time, the charging case can be in two states: the speaker mode and the charging mode. The switching between these two states can be achieved through the key switch of the charging case.

[0031] The first single-pole double-throw switch is the analog switch U3. The NO1 / NO2 pins of the analog switch U3 are respectively connected to the audio signal output pins SPEAK_L+ / SPEAK_L- of the Bluetooth chip. The NC1 / NC2 pins of the analog switch U3 are respectively connected to 5V_L+ / 5V_L- of the Bluetooth chip. The IN1 / IN2 pins of the analog switch U3 are connected to the CONTROL_1 pin of the Bluetooth chip through the resistor R183.

[0032] A protection resistor R182 is connected in series between the VCC pin of the analog switch U3 and the external power supply, and is grounded through the connecting capacitor C116 for filtering protection. The COM1 / COM2 interfaces of the analog switch U3 are respectively connected to the earphone charging terminals OUT5V_L+ / OUT5V_L through resistors.

[0033] The IN1 and IN2 of the analog switch U3 are connected in parallel to form a CONTROL_1 network for control. The CONTROL_1 network will be connected to the IO port of the Bluetooth chip; when the touch detection TOUCH port of the Bluetooth chip recognizes a specific action, for example, after continuous touching 3 times, the Bluetooth chip IO interface will output a high level greater than 1.3V to the analog switch U3 through the CONTROL_1 network, controlling the SPEAK_L+ / SPEAK_L- of the analog switch U3 to be connected to the OUT5V_L+ / OUT5V_L- of the earphone charging terminal, indicating that the earphone is in the audio external playback mode.

[0034] When the touch detection TOUCH port of the Bluetooth chip does not recognize a specific action, the Bluetooth chip IO port will default to output a voltage less than 0.5V to the analog switch U3 through the CONTROL_1 network, controlling the 5V_L+ / 5V_L- of the analog switch U3 to be connected to the OUT5V_L+ / OUT5V_L- of the earphone charging terminal, indicating that the earphone is in the waiting for charging mode.

[0035] The second single-pole double-throw switch is analog switch U8, which has the same structure as analog switch U3, and also includes NC1 / NC2 pins, NO1 / NO2 pins, COM1 / COM2 pins, VCC, and GND pins.

[0036] The outputs VOUT_5V / 5V-_L of the charging IC are respectively connected to the NC1 / NC2 pins of the analog switch U8, the audio input pins LOUT_P / LOUT_N of the power amplifier IC are respectively connected to the NO1 / NO2 pins of the analog switch U8, and the IO1 port of the charging IC is connected to IN1 and IN2 of the analog switch U8. IN1 and IN2 are combined to control a network CONTROL_3 control pin.

[0037] When the charging case receives a specific key operation of the switch key, the key port of the charging IC recognizes the specific operation and the operation time. For example, when long-pressing for 2 seconds, the IO1 port of the charging IC outputs a voltage greater than 1.3V to the analog switch U8 through the network CONTROL_3 control pin, controlling to connect the LOUT_P / LOUT_N pins to the OUT5V_L+ / OUT5V_L- of the headphone charging terminal, and the charging case is in the speaker mode.

[0038] The specific key operation of the switch key can define the specific operation time by itself. For example, other times can also be set, such as long-pressing for 4 seconds, etc.

[0039] When the network CONTROL_3 control pin outputs a voltage less than 0.5V to the analog switch U8, it controls to connect the VOUT_5V / 5V-_L- of the analog switch U8 to the OUT5V_L+ / OUT5V_L- of the headphone charging terminal, and the charging case is in the charging mode.

[0040] The working process of the TWS earphone with a speaker function described in the embodiment of the present application is as follows:

[0041] When the earphone is placed in the charging case, the Pogopin thimble of the charging case will be connected to the Pogopin thimble of the earphone when the earphone is inserted into the case. The SPEAK_L+ / SPEAK_L- or 5V_L+ / 5V_L- coming from the earphone Bluetooth chip are respectively connected to the 5V+_L+ / 5V-_L- of the analog switch U8. The 5V outputs VOUT_5V / 5V-_L- of the charging IC are respectively connected to the NC1 / NC2 pins of the analog switch U8. The audio input terminals LOUT_P / LOUT_N of the power amplifier IC are respectively connected to the NO1 / NO2 pins of the analog switch (U8). The IO1 port of the charging IC is connected to the IN1 and IN2 of the analog switch U8. IN1 and IN2 are combined to control and form a control pin of a network CONTROL_3. Operating the switch button of the charging case through a specific button operation, such as long pressing for 2s, after the charging IC button port recognizes the specific operation, it controls the IO1 port of the charging IC to output a voltage greater than 1.3V to the analog switch U8 through the network CONTROL_3. At this time, it controls the analog switch U8 to connect LOUT_P / LOUT_N to the earphone charging terminals 5V+_L+ / 5V-_L-, indicating that the charging case is in the speaker mode;

[0042] When CONTROL_3 outputs a voltage less than 0.5V to the analog switch U: At this time, it controls VOUT_5V / 5V-_L- to be connected to 5V+_L+ / 5V-_L-, indicating that the charging case is in the charging mode.

[0043] In this way, the embodiment of the present application can control the earphone to switch between the audio external playback mode and the charging case in the speaker mode. After the earphone is placed in the charging case, the audio output signal of the earphone can be output to the charging case, and the sound is amplified by the power amplifier IC of the charging case. In this way, the entire TWS earphone becomes a speaker. Thus, when the user carries the TWS earphone out, it is equivalent to carrying a speaker at the same time.

[0044] Regarding the problems of the existing TWS earphones with single functions and large speaker volumes that are inconvenient to carry, the TWS earphones with speaker functions described in the embodiments of the present application receive the signals output by the IO interface of the Bluetooth chip through a first single-pole double-throw switch to control the output of the audio signals of the audio interface and the input of the charging signals of the first charging interface, and the touch detection TOUCH port realizes the switching between two modes of controlling the audio external playback mode and the waiting charging mode of the earphones; receives the signals output by the IO interface of the box through a second single-pole double-throw switch to control the output of the charging signals of the second charging interface of the charging IC and the input of the power amplifier IC signals, and the power amplifier IC is connected to the speaker, and the second single-pole double-throw switch is connected to the charging terminal of the box; the key switch realizes the switching between two modes of controlling the speaker mode and the charging mode of the charging case. When the earphones are in the audio external playback mode and the charging case is in the speaker mode, the audio output signals of the earphones can be output to the charging case, and the sound is amplified through the power amplifier IC of the charging case. In this way, the entire TWS earphones become a speaker. Thus, the TWS earphones with speaker functions described in the embodiments of the present application can also be used as a speaker while meeting the functions of the existing TWS earphones, so as to achieve the scenario where the TWS earphones and the speaker can be used outside, and they are small in size and convenient to carry.

[0045] The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. However, the scope of the rights of the present invention is not limited thereby. Any modifications, equivalent replacements, and improvements made by those skilled in the art without departing from the scope and essence of the present invention shall fall within the scope of the rights of the present invention.

Claims

1. A pair of TWS earphones with a speaker function, comprising earphones and a charging case, characterized in that, The earphone is equipped with a Bluetooth chip, a first single-pole double-throw switch, and an earphone charging terminal. The Bluetooth chip includes an audio interface, a first charging interface, a Bluetooth chip IO interface, and a touch detection TOUCH port. The first single-pole double-throw switch controls the output of the audio signal of the audio interface and the input of the charging signal of the first charging interface by receiving the signal output by the Bluetooth chip IO interface, thereby realizing the switching between two signals: the output of the audio signal and the input of the charging signal; the touch detection TOUCH port controls the switching between two modes of the earphone, and the two modes are: the audio external playback mode and the waiting for charging mode; The charging case has a charging compartment, and a charging circuit is arranged in the charging compartment. The charging circuit includes a charging IC, a speaker, a power amplifier IC, a second single-pole double-throw switch, and a case charging terminal; the charging IC includes a key switch, a second charging interface, and a case IO interface. The second single-pole double-throw switch receives the signal output by the case IO interface to control the output of the charging signal of the second charging interface of the charging IC and the input of the power amplifier IC signal. The power amplifier IC is connected to the speaker, and the second single-pole double-throw switch is connected to the case charging terminal; the key switch realizes the control of the switching between two modes of the charging case, and the two modes are: the speaker mode and the charging mode; When the earphone is placed in the charging case, the earphone charging terminal is connected to the case charging terminal.

2. The TWS earphone with a speaker function according to claim 1, characterized in that, The first single-pole double-throw switch is an analog switch U3. The NO1 / NO2 pins of the analog switch U3 are respectively connected to the audio signal output pins SPEAK_L+ / SPEAK_L- of the Bluetooth chip. The NC1 / NC 2 pins of the analog switch U3 are respectively connected to 5V_L+ / 5V_L- of the Bluetooth chip. The IN1 / IN2 pins of the analog switch U3 are connected to the CONTROL_1 pin of the Bluetooth chip through a resistor R183.

3. The TWS earphone with a speaker function according to claim 2, wherein A protection resistor R182 is connected in series between the VCC pin of the analog switch U3 and an external power supply, and is grounded through a connecting capacitor C116. The COM1 / COM2 interfaces of the analog switch U3 are respectively connected to the earphone charging terminals OUT5V_L+ / OUT5V_L through resistors.

4. The TWS earphone with a speaker function according to claim 3, characterized in that, IN1 and IN2 of the analog switch U3 are connected in parallel to form a CONTROL_1 network for control, and the CONTROL_1 network will be connected to the Bluetooth chip IO port; when a specific action is recognized by the touch detection TOUCH port of the Bluetooth chip, the Bluetooth chip IO interface will output a high level greater than 1.3V to the analog switch U3 through the CONTROL_1 network, controlling the connection between SPEAK_L+ / SPEAK_L- of the analog switch U3 and OUT5V_L+ / OUT5V_L- of the earphone charging terminal, and the earphone is in the audio external playback mode.

5. The TWS earphone with a speaker function according to claim 3, characterized in that, When the TOUCH port of the Bluetooth chip does not recognize a specific action, the IO port of the Bluetooth chip will default to output a voltage less than 0.5V to the analog switch U3 through the CONTROL_1 network, controlling the 5V_L+ / 5V_L- of the analog switch U3 to be connected to the OUT5V_L+ / OUT5V_L- of the headphone charging terminal, and the headphone is in the waiting charging mode.

6. The TWS earphone with a speaker function according to any one of claims 1-5, characterized in that, The second single-pole double-throw switch is the analog switch U8, and the analog switch U8 has the same structure as the analog switch U3.

7. The TWS earphone with a speaker function according to claim 6, characterized in that, The outputs VOUT_5V / 5V-_L of the charging IC are respectively connected to the NC1 / NC2 pins of the analog switch U8, the audio input pins LOUT_P / LOUT_N of the power amplifier IC are respectively connected to the NO1 / NO2 pins of the analog switch U8, and the IO1 port of the charging IC is connected to IN1 and IN2 of the analog switch U8. IN1 and IN2 are combined to control and form a network CONTROL_3 control pin.

8. The TWS earphone with a speaker function according to claim 7, wherein When the charging case receives a specific key operation of the switch key, the key port of the charging IC recognizes the specific operation. The IO1 port of the charging IC outputs a voltage greater than 1.3V to the analog switch U8 through the network CONTROL_3 control pin, controlling the LOUT_P / LOUT_N pins to be connected to the OUT5V_L+ / OUT5V_L- of the headphone charging terminal, and the charging case is in the speaker mode.

9. The TWS earphone with a speaker function according to claim 8, characterized in that, The specific key operation of the switch key can define the specific operation and the operation time by itself.

10. The TWS earphone with a speaker function as claimed in claim 8, wherein When the network CONTROL_3 control pin outputs a voltage less than 0.5V to the analog switch U8, it controls the VOUT_5V / 5V-_L- of the analog switch U8 to be connected to the OUT5V_L+ / OUT5V_L- of the headphone charging terminal, and the charging case is in the charging mode.

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