Anti-mis-touch circuit and mobile power supply
By introducing an anti-accidental touch circuit into the power bank and utilizing the state switching design of the discharge circuit and the switching module, the accumulation of power in the storage module is prevented, thus solving the problem of power bank reset due to accidental triggering of a brief button press and achieving stable operation of the device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING KUKE ELECTRONIC TECH CO LTD
- Filing Date
- 2025-06-25
- Publication Date
- 2026-06-23
AI Technical Summary
Existing power banks are prone to accidentally triggering the long-press reset function when users quickly press a button once, leading to the risk of device power failure.
An anti-accidental triggering circuit was designed, including a reset module, a storage module, a switch module, and a discharge circuit. When the switch module is turned on, there is no potential difference between the two ends of the storage module, so it does not charge. When it is briefly disconnected, it charges, and when it is turned on again, it discharges the charge through the discharge circuit, thus preventing the accumulation of charge and avoiding accidental reset.
It effectively prevents power accumulation caused by brief button presses, avoids accidental triggering of the reset module, realizes the anti-accidental touch function, and ensures stable operation of the device.
Smart Images
Figure CN224401508U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of charging technology, and in particular to an anti-accidental touch circuit and a power bank. Background Technology
[0002] Currently, many power banks with buttons support both single-trigger and long-press reset functions. However, if a user quickly triggers the button function in a single press, it can easily trigger the long-press reset function, potentially causing the device to lose power during use. Utility Model Content
[0003] This invention provides an anti-accidental touch circuit and a power bank to prevent accidental device reset caused by user touch.
[0004] According to one aspect of the present invention, an anti-accidental touch circuit is provided, comprising: a reset module, a storage module, a discharge circuit, and a switch module;
[0005] The first end of the reset module is connected to the first end of the storage module, and the second end of the reset module is connected to the second end of the storage module; the second end of the storage module is also connected to the first end of the switch module, and the second end of the switch module is connected to a power source; the storage module is charged when the switch module is disconnected.
[0006] The first terminal of the storage module is connected to the first terminal of the discharge circuit, and the second terminal of the discharge circuit is grounded; when the switch module is turned on, the storage module discharges through the discharge circuit.
[0007] The reset module is used to output a reset signal based on the power level of the storage module.
[0008] Optionally, the discharge circuit includes a first switching unit and a first resistor unit;
[0009] The first terminal of the first switch unit is connected to the first terminal of the first resistor unit, the second terminal of the first switch unit is grounded, the control terminal of the first switch unit is connected to the first terminal of the switch module, and the second terminal of the first resistor unit is connected to the first terminal of the storage module.
[0010] Optionally, the switch module includes a touch switch, the first end of which is connected to the second end of the storage module, and the second end of which is connected to the power supply; the touch switch is disconnected when touched and turned on when not touched.
[0011] Optionally, the anti-accidental touch circuit further includes a second resistor unit, the first end of which is connected to the second end of the switch module, and the second end of which is connected to the power supply.
[0012] Optionally, the anti-accidental touch circuit also includes a voltage regulator unit, one end of which is connected to the reset module and the other end is grounded.
[0013] Optionally, the first resistor unit includes a first resistor, and the second resistor unit includes a second resistor.
[0014] Optionally, the storage module includes a first capacitor, and the voltage regulator unit includes a second capacitor.
[0015] Optionally, the reset module includes a reset chip.
[0016] Optionally, the first switching unit includes a transistor, a MOSFET, or an IGBT.
[0017] According to another aspect of the present invention, a portable power supply is provided, including the anti-accidental touch circuit described in any of the first aspects.
[0018] The technical solution provided by this utility model embodiment maintains consistency between the discharge circuit and the conduction state of the switch module. When the switch module is on, there is no potential difference across the storage module, and the storage module does not charge. When the switch module is briefly off, a potential difference exists across the storage module, and the storage module charges. After the storage module returns to the on state from the off state, the discharge circuit also returns to the on state, discharging the charge stored in the storage module during the brief charging when the switch module is off. Since the reset module only outputs a reset signal when the charge in the storage module reaches a certain level, the charge in the storage module is discharged through the discharge circuit each time the switch module returns to the on state from the off state. This prevents the storage module from accumulating charge during each brief charging, thus preventing accidental touches even with continuous short presses.
[0019] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of a reset circuit in the prior art;
[0022] Figure 2 A schematic diagram of the structure of an anti-accidental touch circuit provided by this utility model;
[0023] Figure 3 This is a schematic diagram of another anti-accidental touch circuit provided by this utility model;
[0024] Figure 4 This is a schematic diagram of another anti-accidental touch circuit provided by this utility model.
[0025] Figure 5 This is a schematic diagram of another anti-accidental touch circuit provided by this utility model;
[0026] Figure 6 This is a schematic diagram of another anti-accidental touch circuit provided by this utility model.
[0027] Figure 7 This is a schematic diagram of the structure of a portable power supply provided by this utility model. Detailed Implementation
[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0030] Figure 1This is a schematic diagram of a reset circuit in the prior art. When the switch module 300 is pressed briefly, the storage module 200 stores a certain amount of power; when the switch module 300 is pressed for a long time, the storage module 200 continuously charges. When the power in the storage module 200 accumulates to a certain level, the reset module 100 outputs a reset signal to reset the device. As described in the background art, if the switch module 300 is pressed repeatedly in a short period of time, the power stored in the storage module 200 will gradually accumulate, causing the reset module 100 to mistakenly interpret it as a long press, thus causing the reset module 100 to incorrectly output a reset signal.
[0031] For the reasons mentioned above, this utility model provides a circuit to prevent accidental touch. Figure 2 This is a schematic diagram of a circuit designed to prevent accidental touches, as provided by this utility model. Figure 2 As shown, the anti-accidental touch circuit includes: a reset module 100, a storage module 200, a switch module 300, and a discharge circuit 400; the first terminal of the reset module 100 is connected to the first terminal of the storage module 200, and the second terminal of the reset module 100 is connected to the second terminal of the storage module 200; the second terminal of the storage module 200 is also connected to the first terminal of the switch module 300, and the second terminal of the switch module 300 is connected to the power supply VCC; when the switch module 300 is off, the storage module 200 is charged; the first terminal of the storage module 200 is connected to the first terminal of the discharge circuit 400, and the second terminal of the discharge circuit 400 is grounded; when the switch module 300 is on, the storage module 200 discharges through the discharge circuit 400; the reset module 100 is used to output a reset signal according to the power level of the storage module 200.
[0032] Specifically, the reset module 100 can be a reset chip with a reset function. The power supply VCC can be connected to the power supply terminal of the reset module 100 to power it. The first terminal of the reset module 100 can be the SRT port of the reset chip, connected to the first terminal of the storage module 200, and the first terminal of the reset module 100 can output a high-level signal to the first terminal of the storage module 200. The second terminal of the reset module 100 can be the GND port of the reset chip, connected to the second terminal of the storage module 200. The third terminal of the reset module 100 can be the RESET port of the reset chip, connected to the control chip 10. The RESET port of the reset chip outputs a reset signal to reset the control chip 10 when the power stored in the storage module 200 reaches a certain threshold. The switch module 300 can be a normally closed switch, with one end connected to the second terminal of the storage module 200 and the other end connected to the power supply VCC. When the switch module 300 is in the ON state, both the first and second terminals of the storage module 200 are at high potentials, there is no potential difference, and charging does not occur. When the switch module 300 is OFF, the second terminal of the storage module 200 is disconnected from the power supply VCC, creating a potential difference between the first and second terminals, allowing the storage module 200 to charge. One end of the discharge circuit 400 is connected to the first terminal of the storage module 200, and the other end is grounded. When the switch module 300 is OFF, the discharge circuit 400 is also OFF; when the switch module 300 is ON, the discharge circuit 400 is also ON, providing a path for the storage module 200 to discharge charge. This can be understood as follows: when the switch module 300 is briefly disconnected to charge the storage module 200, and then the switch module 300 returns to the conducting state, the discharge circuit 400 is in the conducting state, discharging the amount of electricity stored in the storage module 200 during the brief charging, thus preventing the storage module 200 from accumulating electricity each time it is briefly charged, thereby preventing the reset module 100 from erroneously issuing a reset signal.
[0033] The technical solution provided by this utility model embodiment is to keep the discharge circuit consistent with the conduction state of the switch module. When the switch module is on, there is no potential difference between the two ends of the storage module, and the storage module does not charge. When the switch module is off, there is a potential difference between the two ends of the storage module, and the storage module charges. When the switch module returns from the off state to the on state, the discharge circuit also returns to the on state, and the discharge circuit discharges the amount of electricity stored in the storage module when the switch module is off. Since the reset module only outputs a reset signal when the amount of electricity in the storage module accumulates to a certain level, the amount of electricity charged in the storage module is discharged through the discharge circuit every time the switch module returns from the off state to the on state. This prevents the storage module from accumulating electricity during each short charge, so even continuous short presses will not trigger the long press reset function of the reset module, thus achieving the function of preventing accidental touch.
[0034] Optionally, Figure 3 This is a schematic diagram of another anti-accidental touch circuit provided by this utility model. Based on the above embodiments, see... Figure 3 The discharge circuit 400 includes a first switching unit 410 and a first resistor unit 420; the first end of the first switching unit 410 is connected to the first end of the first resistor unit 420, the second end of the first switching unit 410 is grounded, the control end of the first switching unit 410 is connected to the first end of the switching module 300, and the second end of the first resistor unit is connected to the first end of the storage module 200.
[0035] Specifically, the first switching unit 410 can be a semiconductor switching transistor, such as a transistor (Metal-Oxide Semiconductor) or an IGBT (Insulated Gate Bipolar Transistor). For example, Figure 3 The explanation will take the first switching unit 410 as an example, where it is an N-type MOSFET T1. Figure 3As shown, the control terminal of the first switching unit 410 can be the gate of the MOSFET T1, connected to the first terminal of the switching module 300; the first terminal of the first switching unit 410 can be the drain of the MOSFET T1, connected to the first terminal of the first resistor unit 420; the first terminal of the first switching unit 410 can be the source of the MOSFET T1, and the first terminal of the first switching unit 410 is grounded. The first resistor unit 420 can be a current-limiting resistor R1 to prevent excessive current in the discharge circuit 400 from damaging the discharge circuit. The storage module 200 can be a first capacitor C1, which can be charged when the switching module 300 is off. When the switching module 300 is in the on state, the control terminal of the first switching unit 410 receives a high-level signal from the power supply VCC, and the first switching unit 410 is also in the on state; when the switching module 300 is in the off state, the control terminal of the first switching unit 410 is connected to the ground port GND of the reset chip, and the first switching unit 410 is also in the off state. That is to say, the first switching unit 410 and the switching module 300 are either in the on state or in the off state together. When the switch module 300 is continuously touched by a human body or object, the switch module 300 remains in the off state. That is, when the switch module 300 is pressed for a long time, the first capacitor C1 is continuously charged. When the charge of the first capacitor C1 accumulates to the trigger threshold of the reset module 100, the reset module 100 outputs a reset signal. When the switch module 300 is briefly touched by a human body or object and then removed, the switch module 300 will return to the on state from the briefly off state. During the brief off state of the switch module 300, that is, when the switch module 300 is pressed for a short time, the first capacitor C1 will be briefly charged. However, since the first switch unit 410 is also in the on state when the switch module 300 returns to the on state, the first switch unit 410 can discharge the charge stored in the first capacitor C1 during the brief charge through the discharge circuit. Even if the switch module 300 is touched continuously in a short period of time, the charge of the storage module 200 during each brief charge will not accumulate, thereby avoiding the reset module 100 from issuing a reset signal incorrectly.
[0036] Optionally, Figure 4 This is a schematic diagram of another anti-accidental touch circuit provided by this utility model. Based on the above embodiments, see... Figure 4 The switch module 300 includes a touch switch K1. The first end of the touch switch K1 is connected to the second end of the storage module 200, and the second end of the touch switch K1 is connected to the power supply VCC. The touch switch K1 is disconnected when touched and turned on when not touched.
[0037] Specifically, the touch switch K1 can be a normally closed capacitive sensing switch. When a person or object touches the touch switch K1, the touch switch K1 is in the open state; when the person or object leaves the touch switch K1 and is no longer in contact with it, the touch switch K1 returns to the closed state. The touch switch K1 has short-press and long-press functions. A short press can be understood as the duration of contact with the touch switch K1 being less than a preset duration, and a long press can be understood as the duration of contact with the touch switch K1 being greater than or equal to the preset duration.
[0038] Optionally, Figure 5 This is a schematic diagram of another anti-accidental touch circuit provided by this utility model. Based on the above embodiments, see... Figure 5 The anti-accidental touch circuit also includes a second resistor unit 500. The first end of the second resistor unit 500 is connected to the second end of the switch module 300, and the second end of the second resistor unit 500 is connected to the power supply VCC.
[0039] Specifically, the second resistor unit 500 can be a current-limiting resistor R2. The first terminal of the current-limiting resistor R2 can be connected to the second terminal of the touch switch K1, and the second terminal of the current-limiting resistor R2 can be connected to the power supply VCC. The current-limiting resistor R2 prevents excessive current in the branch where the touch switch K1 is located from damaging the touch switch K1.
[0040] Optionally, Figure 6 This is a schematic diagram illustrating another anti-accidental touch circuit provided by this utility model. Based on the above embodiments, see... Figure 6 The anti-accidental touch circuit also includes a voltage regulator unit 600, one end of which is connected to the reset module 100, and the other end is grounded.
[0041] Specifically, the voltage regulator unit 600 can be the second capacitor C2. The first end of the second capacitor C2 can be connected to the power supply terminal of the reset chip, and the second end of the second capacitor C2 is grounded, thereby ensuring the stability of the input voltage of the reset chip, so that the reset chip is in normal working condition and avoiding voltage fluctuations that could cause the reset chip to malfunction.
[0042] Figure 7 This is a schematic diagram of the structure of a portable power bank provided by this utility model. Figure 2 and Figure 7 As shown, the portable power supply provided in this embodiment of the present invention includes the anti-accidental touch circuit provided in any embodiment of the present invention.
[0043] Specifically, the accidental touch prevention circuit can be installed inside the power bank. The power bank surface has a contact area A, which functions as the switch module 300 of the accidental touch prevention circuit. When contact area A is pressed and held, the accidental touch prevention circuit operates normally, and the reset chip sends a reset signal to the power bank, resetting it. When contact area A is pressed repeatedly for short periods, the stored charge in the storage module 200 is released through the discharge circuit 400, preventing the storage module 200 from accumulating charge during repeated short presses. This prevents the long-press reset function of the reset module from being triggered, thus achieving the accidental touch prevention function.
[0044] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.
[0045] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.
Claims
1. A circuit for preventing accidental touches, characterized in that, include: Reset module, storage module, discharge circuit and switching module; The first end of the reset module is connected to the first end of the storage module, and the second end of the reset module is connected to the second end of the storage module; the second end of the storage module is also connected to the first end of the switch module, and the second end of the switch module is connected to a power source; the storage module is charged when the switch module is disconnected. The first terminal of the storage module is connected to the first terminal of the discharge circuit, and the second terminal of the discharge circuit is grounded; when the switch module is turned on, the storage module discharges through the discharge circuit. The reset module is used to output a reset signal based on the power level of the storage module.
2. The anti-accidental touch circuit according to claim 1, characterized in that, The discharge circuit includes a first switching unit and a first resistor unit; The first terminal of the first switch unit is connected to the first terminal of the first resistor unit, the second terminal of the first switch unit is grounded, the control terminal of the first switch unit is connected to the first terminal of the switch module, and the second terminal of the first resistor unit is connected to the first terminal of the storage module.
3. The anti-accidental touch circuit according to claim 1, characterized in that, The switch module includes a touch switch, the first end of which is connected to the second end of the storage module, and the second end of which is connected to the power supply; the touch switch is disconnected when touched and connected when not touched.
4. The anti-accidental touch circuit according to claim 2, characterized in that, It also includes a second resistor unit, the first end of which is connected to the second end of the switch module, and the second end of which is connected to the power supply.
5. The anti-accidental touch circuit according to claim 1, characterized in that, It also includes a voltage regulator unit, one end of which is connected to the reset module and the other end is grounded.
6. The anti-accidental touch circuit according to claim 4, characterized in that, The first resistor unit includes a first resistor, and the second resistor unit includes a second resistor.
7. The anti-accidental touch circuit according to claim 5, characterized in that, The storage module includes a first capacitor, and the voltage regulator unit includes a second capacitor.
8. The anti-accidental touch circuit according to claim 1, characterized in that, The reset module includes a reset chip.
9. The anti-accidental touch circuit according to claim 2, characterized in that, The first switching unit includes a transistor, a MOSFET, or an IGBT.
10. A portable power bank, characterized in that, Includes the anti-accidental touch circuit as described in any one of claims 1-9.