Startup and shutdown logic circuit and electronic equipment

Abstract

The utility model provides an on-off logic circuit and electronic equipment. The on-off logic circuit comprises an analog switch module I, an analog switch module II, a key switch module, a switch control module and a reset switch module, the first I / O port end of the switch control module is connected with one end of the key switch module, the other end of the key switch module is connected with the first analog switch module, the first analog switch module is further connected with the second I / O port end of the switch control module, and the first analog switch module is further connected with the reset switch module and the power transmission end. The analog switch module I is also connected with a first end of an analog switch module II, a second end of the analog switch module II is connected with a battery power supply, and a third end of the analog switch module II is connected with a power supply control end of the switch control module; and the reset switch module is connected with a pressing button in the external socket hole. According to the utility model, the machine power supply can be thoroughly cut off after the machine with the battery is shut down, the battery power consumption is reduced, and the storage period of the machine is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of switch circuits, and in particular to a switch logic circuit and electronic equipment. Background Art

[0002] Currently, there are many electronic products on the market that are powered by batteries. However, when these electronic products are turned off by pressing the button, the system is often not really turned off, but the power supply still consumes the battery power, which shortens the storage period of the electronic products and causes unnecessary energy waste. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a power on / off logic circuit and electronic equipment, which can completely shut down the power supply of a machine with a battery after shutting down, reduce battery power consumption, and increase the storage period of the machine.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A power on / off logic circuit, the circuit comprising:

[0006] Analog switch module 1, analog switch module 2, key switch module, switch control module and reset switch module.

[0007] Among them, the I / O port terminal 1 of the switch control module is connected to one end of the key switch module, the other end of the key switch module is connected to the first end of the analog switch module 1, the second end of the analog switch module 1 is connected to the I / O port terminal 2 of the switch control module, the second end of the analog switch module 1 is also connected to one end of the reset switch module and the power transmission end respectively, the first end of the analog switch module 1 is also connected to the first end of the analog switch module 2, the second end of the analog switch module 2 is connected to the battery power supply, and the third end of the analog switch module 2 is connected to the power control end of the switch control module; the other end of the reset switch module is connected to the push button inside the external socket hole.

[0008] In the present invention, the analog switch module 1 at least includes: a transistor Q1, a capacitor C1 and a resistor R1; the key switch module at least includes: a switch key, a resistor R2, a capacitor C2, a diode D1 and a diode D2.

[0009] Furthermore, one end of the switch button is grounded, the other end of the switch button is connected to one end of the resistor R2, the other end of the resistor R2 is connected to one end of the capacitor C2, and the other end of the capacitor C2 is grounded; the other end of the resistor R2 is also connected to the cathode of the diode D1 and the cathode of the diode D2, respectively, and the anode of the diode D2 is connected to the I / O port terminal 1 of the switch control module; the I / O port terminal 1 of the switch control module is used for button detection.

[0010] In the utility model, at least a resistor R3 and a diode D3 are included between the transistor Q1 and the second I / O port of the switch control module, at least a resistor R4 is included between the transistor Q1 and one end of the reset switch module, and at least a diode D4 is included between the transistor Q1 and the power transmission end.

[0011] In the utility model, the anode of the diode D1 is connected to the collector of the transistor Q1, the base of the transistor Q1 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to the cathode of the diode D3, and the anode of the diode D3 is connected to the I / O port terminal 2 of the switch control module; the base of the transistor Q1 is also connected to one end of the resistor R4, and the other end of the resistor R4 is connected to one end of the reset switch module; the other end of the resistor R3 is also connected to the cathode of the diode D4, and the anode of the diode D4 is connected to the power transmission end.

[0012] The emitter of the transistor Q1 is respectively connected to the capacitor C1 and the resistor R1, and then connected to the base of the transistor Q1; wherein the capacitor C1 and the resistor R1 are connected in parallel; the emitter of the transistor Q1 is also grounded.

[0013] In the present invention, the analog switch module 2 at least includes a field effect MOS tube Q2, a resistor R5, a capacitor C3, a capacitor C4 and a capacitor C5; and further includes a resistor R6 between the transistor Q1 and the field effect MOS tube Q2.

[0014] In the utility model, the collector of the transistor Q1 is also connected to one end of the resistor R6, the other end of the resistor R6 is connected to the gate of the field effect MOS tube Q2, the source of the field effect MOS tube Q2 is connected to the battery power supply, the source of the field effect MOS tube Q2 is also connected to the resistor R5 and the capacitor C3, and then connected to the gate of the field effect MOS tube Q2; wherein the resistor R5 and the capacitor C3 are connected in parallel; the drain of the field effect MOS tube Q2 is connected to one end of the capacitor C4, the other end of the capacitor C4 is connected to one end of the capacitor C5, the other end of the capacitor C5 is connected to the power control end of the switch control module, and the other end of the capacitor C4 is also grounded.

[0015] In the utility model, the push button inside the external socket hole is activated by pressing a preset control stick when in use, so as to control the reset switch module to start the reset action.

[0016] In order to achieve the above purpose, the utility model also adopts the following technical solutions:

[0017] An electronic device is powered by a battery and comprises at least one of the above-mentioned power on / off logic circuits.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The utility model proposes a switch logic circuit and electronic device, which can completely disconnect or connect the power supply when turning on and off by controlling the opening or closing of analog switch module 1 and analog switch module 2 by the switch control module, so that the machine with a battery can completely turn off the machine power supply after turning off, reduce battery power consumption, and increase the storage period of the machine. The utility model also solves the technical problem that when the electronic device freezes, the battery cannot be powered off inside the machine and there is no dedicated reset button in the structure, by connecting the reset switch module with the push button inside the external socket hole, and realizes the effect of rapid external reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a switch logic circuit of a preferred embodiment of the utility model.

[0021] Figure 2 The utility model is a circuit diagram of a switch logic circuit according to a preferred embodiment of the utility model.

[0022] Figure 3 It is a schematic diagram of a PCB in which an external socket of a certain speaker device is connected to a switch logic circuit in a preferred embodiment of the utility model. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the accompanying drawings. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0024] Embodiment 1:

[0025] Please refer to Figure 1 In a preferred embodiment, a power on / off logic circuit comprises:

[0026] Analog switch module 1, analog switch module 2, key switch module, switch control module and reset switch module.

[0027] Preferably, the switch control module can be implemented by an MCU module.

[0028] Among them, the I / O port terminal 1 of the switch control module is connected to one end of the key switch module, the other end of the key switch module is connected to the first end of the analog switch module 1, the second end of the analog switch module 1 is connected to the I / O port terminal 2 of the switch control module, the second end of the analog switch module 1 is also connected to one end of the reset switch module and the power transmission end respectively, the first end of the analog switch module 1 is also connected to the first end of the analog switch module 2, the second end of the analog switch module 2 is connected to the battery power supply, and the third end of the analog switch module 2 is connected to the power control end of the switch control module; the other end of the reset switch module is connected to the push button inside the external socket hole.

[0029] It should be noted that, as Figure 2 As shown, the I / O port of the switch control module can be used for key detection. For example, it can be the KEY_DET pin of the MCU module, which is used to detect and identify the state and operation of the key or button. The user's input signal can be captured through key detection, thereby triggering the corresponding power on or power off action.

[0030] The I / O port 2 of the switch control module can be used for power control. For example, it can be the POWER_CTRL pin of the MUC module. When the power-on action is started and the MCU module is powered on, its internal I / O port POWER_CTRL will output a high-level signal. The power-on and power-off functions of the device are controlled by buttons, and at the same time, it is ensured that the device switches the power state correctly after the button operation to achieve the expected power-on and power-off effect.

[0031] The reset circuit switch in the reset switch module can be represented by RESET_KEY, the power transmission end can be represented by USB_VBUS, the power control end of the switch control module can be represented by SYSTM_PWR, and the battery power can be represented by VBAT.

[0032] In this embodiment, the push button inside the external socket hole is activated by pressing a preset control stick when in use, so as to control the reset switch module to start the reset action.

[0033] Preferably, the preset control rod can be an insulating rubber rod, a metal rod, a metal rod, a plastic rod, a carbon fiber rod, a rubber rod or a silicone rod, but are not limited thereto.

[0034] It should be noted that when there are many electrical devices on the market that suddenly freeze, they often cannot be powered off because the battery is inside the machine and there is no dedicated reset button in the structure. The utility model solves this technical problem by connecting the other end of the reset switch module to the push button inside the external socket hole, achieving a quick forced reset outside the machine, greatly improving the user experience of such electrical devices.

[0035] For example, when the speaker product has an AUX IN 3.5MM jack, the 3.5MM socket hole is selected to be straight-through, and a touch switch is placed at the rear end of the 3.5MM socket, and the touch switch is connected to the relevant power-off or reset circuit.

[0036] Furthermore, an insulating rubber stick is used outside the machine to push against the touch switch placed inside through the hole of the 3.5MM socket to cut off or reset the power, as shown in the attached Figure 3 As shown, arrow ① in the figure refers to the inside of an external socket hole of a certain speaker device, and the push button can be installed inside the external socket hole. Arrow ② refers to a PCB board of a power on / off logic circuit connected to the external socket hole of a certain speaker device.

[0037] The push button can be pressed by an insulating rubber stick outside the machine. The push button is connected to K1 of the reset switch module inside the machine to force power off, thereby achieving the effect of forced reset.

[0038] In this embodiment, the analog switch module 1 at least includes: a transistor Q1, a capacitor C1 and a resistor R1; the key switch module at least includes: a switch key, a resistor R2, a capacitor C2, a diode D1 and a diode D2.

[0039] Preferably, the transistor Q1 can be a 3904 model NPN transistor, the capacitor C1 can be 10uF, the resistor R1 can be 10k ohms, the resistor R2 can be 100~1000 ohms, the capacitor C2 can be 0.1uF, the diode D1 and the diode D2 can be 1N4148 models, but are not limited to this.

[0040] Furthermore, one end of the switch button is grounded, the other end of the switch button is connected to one end of the resistor R2, the other end of the resistor R2 is connected to one end of the capacitor C2, and the other end of the capacitor C2 is grounded; the other end of the resistor R2 is also connected to the cathode of the diode D1 and the cathode of the diode D2, respectively, and the anode of the diode D2 is connected to the I / O port terminal 1 of the switch control module; the I / O port terminal 1 of the switch control module is used for button detection.

[0041] It should be noted that when the switch button is pressed or released, a short voltage pulse signal is generated through the RC circuit composed of capacitor C2 and resistor R2. This signal is rectified and filtered by diodes D1 and D2, and then transmitted to the I / O port 1 of the switch control module for key detection. Specifically:

[0042] When the user presses the switch button, capacitor C2 is charged, causing the voltage across R2 to decrease. Due to the forward bias of D1 and D2, only D2 can be turned on, transmitting the voltage signal to the I / O port 1 of the switch control module, triggering the key detection.

[0043] When the user releases the switch button, capacitor C2 starts to discharge, causing the voltage across R2 to gradually increase. At this time, D1 starts to conduct, while D2 stops conducting. Then, the I / O port of the switch control module stops receiving the key signal, completing the key release detection.

[0044] Furthermore, at least a resistor R3 and a diode D3 are included between the transistor Q1 and the second I / O port of the switch control module, at least a resistor R4 is included between the transistor Q1 and one end of the reset switch module, and at least a diode D4 is included between the transistor Q1 and the power transmission end.

[0045] Preferably, the resistor R3 can be 10k ohms, the resistor R4 can be 470 ohms, and the specifications of the diode D3 and the diode D4 can both be 1N4148, but are not limited thereto.

[0046] It should be noted that the resistor R3 and the diode D3 mainly play the role of current limiting and protection. The resistor R3 limits the flow of current, while the diode D3 plays the role of reverse voltage protection to prevent overcurrent or reverse voltage from damaging the switch control module.

[0047] The resistor R4 between transistor Q1 and one end of the reset switch module is used to limit the current and ensure that the current is at a safe level during the reset operation. This helps prevent excessive current in the reset circuit and protects related components. Diode D4 is used to prevent reverse flow of current to protect the power transmission end. This is a common reverse current protection design that ensures that current can only flow in the intended direction.

[0048] In this embodiment, the anode of the diode D1 is connected to the collector of the transistor Q1, the base of the transistor Q1 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to the cathode of the diode D3, and the anode of the diode D3 is connected to the I / O port terminal 2 of the switch control module; the base of the transistor Q1 is also connected to one end of the resistor R4, and the other end of the resistor R4 is connected to one end of the reset switch module; the other end of the resistor R3 is also connected to the cathode of the diode D4, and the anode of the diode D4 is connected to the power transmission end; the emitter of the transistor Q1 is respectively connected to the capacitor C1 and the resistor R1, and then connected to the base of the transistor Q1; wherein the capacitor C1 and the resistor R1 are connected in parallel; the emitter of the transistor Q1 is also grounded.

[0049] The connection of transistor Q1, resistor R4 and reset switch module forms a control path for reset operation, ensuring that the circuit can be reset normally when needed. When a reset operation is required, the circuit transmits and processes the reset signal through these components.

[0050] The connection between resistor R3, diode D4 and the power transmission end is used to protect the key components in the circuit from abnormal current or reverse voltage. Through these connections, the circuit can ensure that the current can only flow in the expected direction, protecting the equipment and the power supply end from damage.

[0051] The emitter of transistor Q1, capacitor C1 and resistor R1 form an RC circuit, which can be used to provide a stable bias voltage or other signal processing functions. Through these connections, the circuit can filter, adjust or otherwise process the signal to ensure the stability and performance of the circuit.

[0052] In the present invention, the analog switch module 2 at least includes a field effect MOS tube Q2, a resistor R5, a capacitor C3, a capacitor C4 and a capacitor C5; and further includes a resistor R6 between the transistor Q1 and the field effect MOS tube Q2.

[0053] Preferably, the field effect MOS tube Q2 can be an 8-pin PMOS tube, the resistor R5 can be 100k ohms, the resistor R6 can be 100-1000 ohms, the capacitor C3 can be 1μF, the capacitor C4 can be 10μF, and the capacitor C5 can be 0.1μF, but are not limited thereto.

[0054] In the utility model, the collector of the transistor Q1 is also connected to one end of the resistor R6, the other end of the resistor R6 is connected to the gate of the field effect MOS tube Q2, the source of the field effect MOS tube Q2 is connected to the battery power supply, the source of the field effect MOS tube Q2 is also connected to the resistor R5 and the capacitor C3, and then connected to the gate of the field effect MOS tube Q2; wherein the resistor R5 and the capacitor C3 are connected in parallel; the drain of the field effect MOS tube Q2 is connected to one end of the capacitor C4, the other end of the capacitor C4 is connected to one end of the capacitor C5, the other end of the capacitor C5 is connected to the power control end of the switch control module, and the other end of the capacitor C4 is also grounded.

[0055] It should be noted that the field effect MOS tube Q2 is equivalent to a switch that controls the power-on of the MCU module. When Q2 is turned on, the power of the MCU module is also turned on.

[0056] The circuit working principle of this embodiment is mainly as follows:

[0057] Power-on control principle:

[0058] Press the switch (POWER_KEY): The user starts the process.

[0059] PMOS tube control: The key action pulls down the gate (G) level of the PMOS. The PMOS tube is turned off at a high level and turned on at a low level. Therefore, this step turns on the PMOS.

[0060] Battery power is turned on: As the PMOS is turned on, the battery power connection is also turned on to provide power to the MCU module.

[0061] MCU powers on and controls the circuit: After the MCU is powered on, its internal IO (input / output) port POWER_CTRL outputs a high level.

[0062] Transistor Q1 control: The high level of POWER_CTRL turns on the base of transistor Q1, which causes the gate of D1 to be pulled low, maintaining its on state.

[0063] Release the button: Even if the user releases the button, the MCU keeps D1 turned on by controlling transistor Q1, and the machine continues to work normally.

[0064] Shutdown control principle:

[0065] Press the switch (POWER_KEY): The user starts the process again.

[0066] MCU detects key action: The MCU's IO port KEY_DET detects that the key is pulled low and determines the key action.

[0067] MCU control circuit disconnection: MCU controls its IO port POWER_CTRL to output a low level, making the base of transistor Q1 low level and thus not conducting.

[0068] Battery power is turned off: Since transistor Q1 is not conducting, the gate of D1 is directly pulled up to the battery power (high level), causing the battery power to be turned off.

[0069] Disconnecting the power supply: Finally, the entire connection between the back end of the machine and the battery is completely disconnected by shutting down the battery power connection.

[0070] External reset control principle:

[0071] When the insulating rubber stick presses the push button, and the push button is connected to K1 of the reset switch module inside the machine to force power off, the base of the transistor Q1 in the power on / off logic circuit is pulled low, causing the transistor Q1 to be non-conductive, and then the gate of the field effect MOS tube Q2 is at a high level, causing the field effect MOS tube Q2 to be non-conductive, and finally the entire circuit is powered off, forming a forced reset function.

[0072] In summary, the embodiments of the present invention can completely disconnect the power supply when not needed, reduce the static consumption of the battery, and thus extend the storage time of the battery and the standby time of the device. This is particularly important in battery-powered electronic devices such as portable speakers, which try to avoid these devices still consuming power when not in use, thereby shortening the effective use cycle of the product.

[0073] Embodiment 2:

[0074] In a preferred embodiment, an electronic device is provided, the electronic device being powered by a battery and comprising at least one of the power on / off logic circuits described above.

[0075] Preferably, assuming there is a portable Bluetooth speaker, it requires a reliable on / off logic circuit to ensure that the user can conveniently control the on / off state of the speaker, while protecting the circuit from abnormal current or reverse voltage.

[0076] Power-on operation: When the user presses the power button on the speaker, the power-on logic circuit is responsible for detecting the key signal and transmitting the signal to the speaker's main control board through the corresponding path, triggering the speaker's power-on operation. In this process, components in the power-on logic circuit, such as resistors, diodes, and field-effect MOS tubes, play a key role in ensuring the stability and reliability of signal transmission.

[0077] Shutdown operation: When the user presses the power button again, the power-on / off logic circuit detects the button release signal and sends a shutdown command to the main control board, thereby shutting down the speaker. At the same time, the protection components in the circuit, such as diodes and capacitors, also play a protective role to ensure the safety of power management.

[0078] In speaker equipment, a sudden current surge or reverse voltage may occur when the battery is powered. The protection elements such as diodes, capacitors and resistors in the power on and off logic circuit can effectively protect the main control board and other key components from damage or interference.

[0079] It should be noted that if the speaker device suddenly fails and needs to be forced to reset, the other end of the reset switch module can be connected to the push button inside the external socket hole, and then pressed outside the machine with an insulating rubber stick to achieve a quick forced reset, which greatly improves the user experience of this type of electrical equipment

[0080] Based on the power on / off logic circuit described in a preferred embodiment, in accordance with the actual needs of the speaker device, appropriate component models and values ​​are selected, and design and debugging are performed to finally realize a stable and reliable power on / off system. For example, field effect MOS tubes, diodes and capacitors suitable for the power and power supply characteristics of the speaker device are selected, and the value range of the resistor is determined according to the circuit design requirements to ensure the performance and reliability of the circuit, but are not limited thereto.

[0081] In summary, the power on / off logic circuit plays a key role in the speaker device. Through its precise control and protection functions, it ensures the normal operation of the speaker device and user experience.

[0082] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0083] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0084] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0085] Although the utility model is described in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes based on the above content. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.

Claims

1. A power on / off logic circuit, characterized in that: include: Analog switch module 1, analog switch module 2, key switch module, switch control module and reset switch module; Among them, the I / O port terminal 1 of the switch control module is connected to one end of the key switch module, the other end of the key switch module is connected to the first end of the analog switch module 1, the second end of the analog switch module 1 is connected to the I / O port terminal 2 of the switch control module, the second end of the analog switch module 1 is also connected to one end of the reset switch module and the power transmission end respectively, the first end of the analog switch module 1 is also connected to the first end of the analog switch module 2, the second end of the analog switch module 2 is connected to the battery power supply, and the third end of the analog switch module 2 is connected to the power control end of the switch control module; the other end of the reset switch module is connected to the push button inside the external socket hole.

2. The power on / off logic circuit according to claim 1, characterized in that: The analog switch module 1 at least includes: a transistor Q1, a capacitor C1 and a resistor R1; The key switch module at least includes: a switch key, a resistor R2, a capacitor C2, a diode D1 and a diode D2.

3. The power on / off logic circuit according to claim 2, characterized in that: One end of the switch button is grounded, the other end of the switch button is connected to one end of the resistor R2, the other end of the resistor R2 is connected to one end of the capacitor C2, and the other end of the capacitor C2 is grounded; The other end of the resistor R2 is also connected to the cathode of the diode D1 and the cathode of the diode D2 respectively, and the anode of the diode D2 is connected to the I / O port terminal 1 of the switch control module; the I / O port terminal 1 of the switch control module is used for key detection.

4. The on / off logic circuit according to claim 3, characterized in that: At least a resistor R3 and a diode D3 are included between the transistor Q1 and the second I / O port of the switch control module, at least a resistor R4 is included between the transistor Q1 and one end of the reset switch module, and at least a diode D4 is included between the transistor Q1 and the power transmission end.

5. The on / off logic circuit according to claim 4, characterized in that: The anode of the diode D1 is connected to the collector of the transistor Q1, the base of the transistor Q1 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to the cathode of the diode D3, and the anode of the diode D3 is connected to the second I / O port of the switch control module; The base of the transistor Q1 is also connected to one end of the resistor R4, and the other end of the resistor R4 is connected to one end of the reset switch module; The other end of the resistor R3 is also connected to the cathode of the diode D4, and the anode of the diode D4 is connected to the power transmission end; The emitter of the transistor Q1 is respectively connected to the capacitor C1 and the resistor R1, and then connected to the base of the transistor Q1; wherein the capacitor C1 and the resistor R1 are connected in parallel; the emitter of the transistor Q1 is also grounded.

6. The on / off logic circuit according to claim 5, characterized in that: The analog switch module 2 at least includes a field effect MOS tube Q2, a resistor R5, a capacitor C3, a capacitor C4 and a capacitor C5; A resistor R6 is further included between the transistor Q1 and the field effect MOS transistor Q2.

7. The on / off logic circuit according to claim 6, characterized in that: The collector of the transistor Q1 is also connected to one end of the resistor R6, the other end of the resistor R6 is connected to the gate of the field effect MOS transistor Q2, the source of the field effect MOS transistor Q2 is connected to the battery power source, the source of the field effect MOS transistor Q2 is also connected to the resistor R5 and the capacitor C3, and then connected to the gate of the field effect MOS transistor Q2; wherein the resistor R5 and the capacitor C3 are connected in parallel; The drain of the field effect MOS tube Q2 is connected to one end of the capacitor C4, the other end of the capacitor C4 is connected to one end of the capacitor C5, the other end of the capacitor C5 is connected to the power control end of the switch control module, and the other end of the capacitor C4 is also grounded.

8. The on / off logic circuit according to claim 7, characterized in that: The push button inside the external socket hole is activated by pressing a preset control stick when in use, so as to control the reset switch module to start the reset action.

9. An electronic device, characterized in that: The electronic device is powered by a battery and comprises at least the power on / off logic circuit as described in any one of claims 1 to 8.

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