Lossless pulse starting circuit and sports earphone using the same

Abstract

The utility model discloses a kind of non-destructive impulse starting circuit and the motion earphone using the circuit, the non-destructive impulse starting circuit includes: Hall switch circuit, contain Hall switch U1 and capacitor C3, U1 connects battery VBAT and ground;RC charging-discharging delay circuit is composed of resistance R9, capacitor C2, resistance R6, receives U1 output and generates delay signal;MOS switch circuit contains N channel MOS tube Q3, P channel MOS tube Q4 and resistance R7, Q3 gate connects RC circuit, drain electrode connects Q4 gate, Q4 connects VBAT and chip ONOFF pin, generates starting pulse.The two earphone tail ends of motion earphone are magnetically attracted to connect, one is provided with Hall U1, and the other magnet outer end is N pole, and starting is triggered by magnetic attraction change;Control part has multifunctional key and volume ± key.The utility model has no mechanical wear, convenient operation, circuit is stable, element is conventional, and promote earphone life and experience.

Description

Technical Field

[0001] This utility model relates to a power-on circuit, specifically to a lossless pulse power-on circuit and a sports headphone using the circuit. Background Technology

[0002] As Bluetooth earphones become increasingly popular in people's lives, they come in two types: TWS and sports. Regular TWS earphones are prone to falling out and getting lost during exercise, so people often wear sports Bluetooth earphones when exercising. Figure 1 The image shows a Bluetooth sports headset. Sports headsets typically have three buttons: volume up, volume down, and a multi-function button (power on / off, answering / hanging up calls, etc.). In practical use, the multi-function button is used very frequently, handling functions such as powering on / off, answering / hanging up calls, pausing music, and playing music. Mechanical physical buttons have significant drawbacks; prolonged use can easily lead to mechanical damage, causing the headset to become unusable. If effective repair or replacement is not possible, the entire headset is essentially rendered unusable.

[0003] like Figure 2 This is a waveform diagram of the power-on process during testing. When the battery voltage is 3.9V, pressing the power button for more than 200ms can trigger the system to power on, and IO6 will have a high-level output after power-on.

[0004] In existing technology, a common method for powering on is to short-circuit the ON / OFF pin to BAT using a button, which generates a brief high-level trigger signal. For example... Figure 2 As shown, pressing the power button every time the device is turned on is cumbersome and also affects the physical lifespan of the power button.

[0005] Disadvantages of a physical power button: 1. Oxidation can easily occur over time, leading to poor contact and preventing the device from turning on; 2. With repeated use, the elasticity will weaken and it will lose its ability to rebound, resulting in the device failing to power on; 3. It is rather cumbersome to use, requiring physical pressing every time it is turned on.

[0006] Therefore, it is necessary to improve the existing power-on circuit. Utility Model Content

[0007] To address the shortcomings of existing technologies, the present invention aims to provide a lossless pulse power-on circuit and a sports headphone using this circuit.

[0008] To solve the above technical problems, this utility model provides the following solution: A lossless pulse power-on circuit of this utility model, comprising: A Hall switch circuit includes a Hall switch U1, with pin 1 (VS) of the Hall switch U1 connected to the battery VBAT circuit and pin 3 (GND) grounded. A capacitor C3 is also connected between pin 1 (VS) and pin 3 (GND) of the Hall switch U1. An RC charging and discharging delay circuit includes a resistor R9, a capacitor C2, and a resistor R6. The first end of the resistor R9 is connected to pin 2 (Q) of the Hall switch U1, and its second end is connected to the first end of the capacitor C2. The second end of the capacitor C2 is connected to the first end of the resistor R6, and the second end of the resistor R6 is grounded. A MOS switching circuit includes MOS transistors Q3 and Q4 and a resistor R7. The gate G of MOS transistor Q3 is connected to the second terminal of capacitor C2, and its source S is grounded. The drain D of MOS transistor Q3 is connected to the gate G of MOS transistor Q4. The source S of MOS transistor Q4 is connected to the VBAT circuit of a battery, and its drain D is connected to the ON / OFF pin of a chip. A resistor R7 is connected between the source S and the gate G of MOS transistor Q4, and a diode is connected between the source S and the drain D of MOS transistor Q3.

[0009] Furthermore, the capacitor C3 is a 105 capacitor.

[0010] Furthermore, the MOS transistor Q3 is an N-channel MOS transistor.

[0011] Furthermore, the MOS transistor Q4 is a P-channel MOS transistor.

[0012] This utility model discloses a sports earphone, which has a power supply unit, a control unit, and a neckband connecting the power supply unit and the control unit. A first wire is led out from the power supply unit to connect to a first earphone, and a second wire is led out from the control unit to connect to a second earphone. The tail ends of the first earphone and the second earphone are magnetically connected. The feature is that, in the first earphone and the second earphone, the magnetic end of one earphone is provided with a Hall effect sensor U1, and the magnetic pole direction of the outer end of the magnet of the other earphone is provided with an N pole.

[0013] Furthermore, the control unit has buttons, which include a multi-function button in the central area, a volume + button at one end of the button, and a volume - button at the other end of the button.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model's lossless pulse power-on circuit eliminates mechanical wear and extends device life: It eliminates the traditional physical power-on button and achieves non-contact triggering through "magnetic attraction + Hall switch," eliminating friction and wear of any mechanical parts, completely solving the problem of power-on failure caused by button oxidation and elastic decay, and significantly improving the service life of sports headphones.

[0015] 2. The lossless pulse power-on circuit of this utility model is easy to operate and suitable for sports scenarios: powering on only requires magnetically attaching the ends of the two earphones together to trigger the operation, without the need to manually press the button, which is especially suitable for one-handed operation during exercise.

[0016] 3. The lossless pulse power-on circuit of this utility model is stable and reliable in triggering: the power-on pulse duration is precisely controlled by the RC charging and discharging delay circuit to ensure that a valid power-on signal is generated every time the magnetic attraction is performed; at the same time, the filtering effect of capacitor C3 and the reverse diode protection of MOSFET Q3 improve the circuit's anti-interference capability and stability.

[0017] 4. The lossless pulse power-on circuit of this utility model has strong compatibility and is easy to mass-produce: the components used in the circuit are all conventional electronic components, which are low in cost and easy to purchase; moreover, the circuit structure is simple, does not require complex chips, and can be directly integrated into the power control board of existing sports headphones, which has strong compatibility and is suitable for mass production. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of sports headphones in the prior art.

[0019] Figure 2 A waveform diagram of the power-on of existing sports headphones.

[0020] Figure 3 This is the circuit diagram for the lossless pulse power-on of this utility model.

[0021] Figure 4 This is a graph showing the relationship between the output voltage (VQ) of the Hall switch of this invention and the applied magnetic field (B-Field).

[0022] Figure 5 This is a waveform diagram of the power-on of the sports headphones of this utility model.

[0023] Figure 6 This is a diagram showing the characteristic relationship between the DS and GS of the PMOS transistor of this invention.

[0024] Figure 7 This is a diagram showing the characteristic relationship between the DS and GS of the NMOS transistor of this invention.

[0025] The attached diagram is labeled as follows: Hall switch circuit 1, RC charging and discharging delay circuit 2, MOS switch circuit 3, tail magnetic connection 10, volume + button 20, multi-function button 30, and volume - button 40. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model. Obviously, the embodiments described in this utility model are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0028] Example 1: The specific structure of this utility model is as follows: Please refer to the appendix. Figure 3 A lossless pulse power-on circuit, characterized in that it comprises: Hall switch circuit 1, which includes Hall switch U1, whose pin 1 VS is connected to the battery VBAT circuit, and whose pin 3 GND is grounded. A capacitor C3 is also connected between pin 1 VS and pin 3 GND of Hall switch U1. An RC charging and discharging delay circuit 2 is provided, comprising a resistor R9, a capacitor C2, and a resistor R6. The first end of the resistor R9 is connected to pin 2 (Q) of the Hall switch U1, and its second end is connected to the first end of the capacitor C2. The second end of the capacitor C2 is connected to the first end of the resistor R6, and the second end of the resistor R6 is grounded. MOS switching circuit 3 includes MOS transistors Q3 and Q4 and resistor R7. The gate G of MOS transistor Q3 is connected to the second terminal of capacitor C2, and its source S is grounded. The drain D of MOS transistor Q3 is connected to the gate G of MOS transistor Q4. The source S of MOS transistor Q4 is connected to the battery VBAT circuit, and its drain D is connected to the ON / OFF pin of the chip. Resistor R7 is connected between the source S and gate G of MOS transistor Q4, and diode is connected between the source S and drain D of MOS transistor Q3.

[0029] The capacitor C3 is a 105 capacitor.

[0030] The MOSFET Q3 is an N-channel MOSFET.

[0031] The MOSFET Q4 is a P-channel MOSFET.

[0032] The following is a detailed description of the lossless pulse power-on circuit in this embodiment: This utility model's lossless pulse power-on circuit mainly consists of three parts (such as...). Figure 3 The circuit consists of three main components: Hall effect switch circuit 1, RC charge / discharge delay circuit 2, and MOS switch circuit 3. Hall effect switch circuit 1 is composed of a Hall effect switch U1 and a capacitor C3. The RC charge / discharge delay circuit 2 includes resistor R9, capacitor C2, and resistor R6. MOS switch circuit 3 mainly consists of MOSFETs Q3 and Q4 and resistor R7. The working principle of the lossless pulse power-on circuit is explained in detail below: In Hall switch circuit 1, capacitor C3 with a value of 105V ensures stable operation of U1. Under normal circumstances, when the voltage difference between pins 1 and 3 of Hall switch U1 is greater than 1.8-5.5V, pin 2 of Hall switch U1 outputs a high level (consistent with the voltage of pin 1). When Hall switch U1 is subjected to an external N-pole magnetic field, pin 2 of Hall switch U1 will output a low level (0V). Figure 4 ).

[0033] In RC charging and discharging delay circuit 2, when the output of Hall switch U1's 2-pin changes from low to high (AC), the charge is quickly transferred from capacitor C2-1-pin to capacitor C2-2-pin through resistor R9. Since Hall switch U1's 2-pin remains high (equivalent to DC, unable to pass through capacitor C2), the charge stored in capacitor C2-2-pin is slowly discharged to 0V through resistor R6. Figure 5 ).

[0034] MOS switching circuit 3: MOS transistor Q4 is a PMOS transistor. Based on the relationship between the DS and GS of a PMOS transistor (e.g....), Figure 6 Since there is a parallel resistor R7 between the Gpin and Spin of MOSFET Q4, when the Gpin of MOSFET Q4 is not pulled low, the Spin and Dpin of MOSFET Q4 are in a disconnected state.

[0035] MOSFET Q3 is an NMOS transistor. Based on the relationship between the current supply (DS) and gate (GS) of an NMOS transistor (e.g., ...), ... Figure 7 Since there is a parallel resistor R6 between the Gpin and GND of MOSFET Q3, when the Gpin of MOSFET Q3 is not pulled high, the Spin and Dpin of MOSFET Q3 are in a disconnected state.

[0036] This utility model relates to a lossless pulse power-on circuit, which, when combined, achieves the desired power-on pulse level effect. Magnets are placed on the two ear tips of the sports headphones, with a Hall switch U1 inserted at one end and the N-pole of the magnet at the other ear tip facing outwards. When the two ear tips suddenly open from their attracted state, pin 2 of Hall switch U1 outputs a high level (pin 2 = pin 1). This high level, after passing through resistor R9, is quickly charged by capacitor C2 and transmitted to pin G of MOSFET Q3. Upon receiving the high level, MOSFET Q3 immediately short-circuits pins D and S, causing pin D to become 0V (pin G of MOSFET Q4 in the same network also becomes 0V). Simultaneously, pins S and D of MOSFET Q4 are also short-circuited, resulting in a high level in the ON / OFF network (ONOFF = VBAT). Figure 5 The blue waveform will rise from 0V to 4V.

[0037] Due to the characteristics of capacitors (allowing AC but blocking DC), and because pin 2 of U1 continuously outputs a high level (DC) after changing from 0V to high, C2 cannot continuously transfer charge from pin 1 to pin 2. The charge previously stored on pin 2 of C2 will be slowly discharged to 0V by R6 (e.g., ...). Figure 5 (The yellow waveform); When the level of pin 2 of C2 drops to the GS drive voltage of Q3, the path between DS of Q3 will be closed. At this time, due to the effect of R7 in parallel between GS of Q4, pin G of Q4 will also go high. At this time, the path between DS of Q4 will also be closed, and pin D of Q4 will change from high to low (as shown in the yellow waveform). Figure 5 The blue waveform will rise from 0V to 4V and then return to a low level. Once the MCU receives a high-level signal greater than 200ms, it can trigger the internal power-on circuit to complete the power-on process. After power-on, the MCU's IO6 pin can be pulled high to 3.3V (e.g., ...). Figure 5 (The purple waveform).

[0038] Example 2:

[0039] This utility model discloses a sports earphone, which has a power supply unit, a control unit, and a neckband connecting the power supply unit and the control unit. A first wire is led out from the power supply unit to connect to a first earphone, and a second wire is led out from the control unit to connect to a second earphone. The tail ends of the first earphone and the second earphone are magnetically connected by a 10. In the first earphone and the second earphone, a Hall effect sensor U1 is provided on the magnetic end of one earphone, and the magnetic pole direction of the outer end of the magnet of the other earphone is set to N pole.

[0040] The control unit has buttons, including a multi-function button 30 in the middle area, a volume + button 20 at one end of the button, and a volume - button 40 at the other end of the button.

[0041] In summary, the lossless pulse power-on circuit of this utility model has no mechanical wear and extends the life of the device: it eliminates the traditional physical power-on button and achieves non-contact triggering through "magnetic attraction + Hall switch", without any friction and wear of mechanical parts, completely solving the problem of power-on failure caused by button oxidation and elastic decay, and significantly improving the service life of sports headphones.

[0042] This utility model's lossless pulse power-on circuit is easy to operate and suitable for sports scenarios: powering on only requires magnetically attaching the ends of the two earphones together, without the need to manually press any buttons, making it especially suitable for one-handed operation during exercise.

[0043] This utility model's lossless pulse power-on circuit is stable and reliable in triggering: the power-on pulse duration is precisely controlled by an RC charging and discharging delay circuit to ensure that a valid power-on signal is generated every time the magnetic attraction occurs; at the same time, the filtering effect of capacitor C3 and the reverse diode protection of MOSFET Q3 enhance the circuit's anti-interference capability and stability.

[0044] This utility model's lossless pulse power-on circuit has strong compatibility and is easy to mass-produce: the components used in the circuit are all conventional electronic components, which are low in cost and easy to procure; moreover, the circuit structure is simple, requiring no complex chips, and can be directly integrated into the power control board of existing sports headphones, making it highly compatible and suitable for mass production.

[0045] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the contents of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A lossless power-on circuit, characterized by, include: Hall switch circuit (1), the Hall switch circuit (1) includes Hall switch U1, pin 1 VS of the Hall switch U1 is connected to the battery VBAT circuit, pin 3 GND is grounded, and capacitor C3 is connected between pin 1 VS and pin 3 GND of the Hall switch U1. RC charging and discharging delay circuit (2), the RC charging and discharging delay circuit (2) includes resistor R9, capacitor C2 and resistor R6. The first end of resistor R9 is connected to pin 2 Q of Hall switch U1, its second end is connected to the first end of capacitor C2, the second end of capacitor C2 is connected to the first end of resistor R6, and the second end of resistor R6 is grounded. The MOS switching circuit (3) includes MOS transistors Q3 and Q4 and resistor R7. The gate G of MOS transistor Q3 is connected to the second terminal of capacitor C2, and its source S is grounded. The drain D of MOS transistor Q3 is connected to the gate G of MOS transistor Q4. The source S of MOS transistor Q4 is connected to the battery VBAT circuit, and its drain D is connected to the ONOFF pin of the chip. Resistor R7 is connected between the source S and the gate G of MOS transistor Q4, and diode is connected between the source S and the drain D of MOS transistor Q3.

2. A non-invasive pulse-on circuit according to claim 1, wherein, The capacitor C3 is a 105 capacitor.

3. A non-invasive power-on circuit according to claim 1, wherein, The MOSFET Q3 is an N-channel MOSFET.

4. A non-invasive power-on circuit according to claim 1, wherein, The MOSFET Q4 is a P-channel MOSFET.

5. A sports earphone, characterized by Includes the lossless pulse power-on circuit as described in any one of claims 1-4.

6. A sports earphone according to claim 5, the sports earphone having a power supply unit, a control unit, and a neckband connecting the power supply unit and the control unit, a first wire leading from the power supply unit to connect to a first earphone, and a second wire leading from the control unit to connect to a second earphone, wherein the tail ends of the first earphone and the second earphone are magnetically connected (10); characterized in that, In the first and second earphones, one earphone has a Hall effect U1 on its magnetic end, and the other earphone has an N pole on the outer end of its magnet.

7. The sports earphone of claim 6, wherein, The control unit has buttons, which include a multi-function button (30) in the middle area, a volume + button (20) at one end of the button, and a volume - button (40) at the other end of the button.

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