Automatic power-off protection device

Abstract

The utility model relates to the technical field of self-power-off protection, and discloses a self-power-off protection device, which is used for a power adapter and comprises a power supply, a current sensing device electrically connected with the power supply, a delay timer and a switch control device, the switch control device is used for being connected with the input end of the power adapter, the input end of the delay timer is connected with the output end of the current sensing device, and the output end of the delay timer is connected with the input end of the switch control device. According to the utility model, after the current sensing device judges that no load exists, the delay timer automatically adds a time delay, and if current change signals of the current sensing device are not received again within the time delay, trigger signals are sent to the switch control device to control the input end of the power adapter to be powered off; therefore, automatic power-off of the power adapter in a no-load state is realized, the energy consumption loss of an electric appliance is reduced, and the fire risk of the electric appliance caused by possible short circuit is also avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of self - power - off protection, in particular to a self - power - off protection device for micro - current state. Background Art

[0002] Existing power strips, electrical switches, etc. usually have safety protection devices such as overload, leakage, and lightning protection. These devices are usually installed as an independent optional unit inside the switch, providing maximum protection for instantaneous large currents.

[0003] However, electrical safety protection devices only protect the safety of electrical equipment and people in the state of large current, but there is insufficient protection for the situation where the micro - current state of more and more power adapters under no - load lasts too long. For example, in homes or offices, people often leave the power adapters of mobile phones, tablets, laptops, etc. plugged into the power strip for a long time and do not unplug them even when not in use, which is likely to cause the adapter to heat up, component aging, and even short - circuit and cause a fire. Summary of the Utility Model

[0004] To solve the above - mentioned technical problems, the utility model provides a self - power - off protection device, which realizes automatic power - off of the power adapter in the no - load state, reduces electrical energy consumption loss, and avoids the risk of electrical fire.

[0005] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0006] A self - power - off protection device for a power adapter, comprising a power supply, a current sensing device electrically connected to the power supply, a delay timer, and a switch control device. The current sensing device is used to connect to the output end of the power adapter, the switch control device is used to connect to the input end of the power adapter, the input end of the delay timer is connected to the output end of the current sensing device, and the output end of the delay timer is connected to the input end of the switch control device.

[0007] Preferably, the current sensing device includes a connected current sensing magnetic ring and an induction chip. The current sensing magnetic ring is used to sleeved on the output line of the power adapter, the induction chip is connected to the power supply, and the output end of the induction chip is connected to the input end of the delay timer.

[0008] Preferably, it includes a housing, and the power supply, the induction chip, the delay timer, and the switch control device are all arranged inside the housing.

[0009] Preferably, the induction chip is a single - chip microcomputer.

[0010] Preferably, the switch control device includes a control chip connected to the power supply and a level control switch. The level control switch is also connected to the output end of the control chip and the input end of the power adapter respectively. The output end of the delay timer is connected to the input end of the control chip.

[0011] Preferably, the control chip is a single-chip microcomputer.

[0012] Preferably, the power supply is a button battery.

[0013] Compared with the prior art, the self-powered off protection device of the embodiment of the present invention has the beneficial effects that: by setting a current sensing device connected to the output end of the power adapter, setting a switch control device connected to the input end of the power adapter, at the same time, setting a delay timer connected to the output end of the current sensing device, and connecting the output end of the delay timer to the input end of the switch control device, the current sensing device senses the change of the output current of the power adapter, triggers a signal after judging no-load, the delay timer automatically adds a time delay after receiving the signal of the current sensing device, and if no current change signal of the current sensing device is received again within the time delay, a trigger signal is sent to the switch control device to control the power-off of the input end of the power adapter, thereby realizing the automatic power-off of the power adapter in the no-load state, not only reducing the energy consumption loss of the electrical appliance, but also avoiding the risk of electrical appliance fire caused by possible short circuits. Description of the Drawings

[0014] Figure 1 It is a structural schematic diagram of the self-powered off protection device of the present invention.

[0015] Wherein: 1 - power supply, 2 - current sensing magnetic ring, 3 - sensing chip, 4 - delay timer, 5 - control chip, 6 - level control switch, 100 - power adapter. Detailed Embodiments

[0016] The following will further describe in detail the specific embodiments of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0017] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] Such asFigure 1 As shown in the figure, a self-powered power-off protection device for a preferred embodiment of the present utility model is used for a power adapter 100, and includes a power supply 1, a current sensing device electrically connected to the power supply 1, a delay timer 4, and a switch control device. The power supply supplies power to the current sensing device, the delay timer 4, and the switch control device. The current sensing device is used to connect to the output end of the power adapter 100, the switch control device is used to connect to the input end of the power adapter 100, the input end of the delay timer 4 is connected to the output end of the current sensing device, and the output end of the delay timer 4 is connected to the input end of the switch control device.

[0019] Based on the self-powered power-off protection device with the above technical features, by setting the current sensing device to connect to the output end of the power adapter 100, setting the switch control device to connect to the input end of the power adapter 100, and at the same time, setting the delay timer 4 to connect to the output end of the current sensing device and connecting the output end of the delay timer 4 to the input end of the switch control device, the current sensing device senses the change in the output current of the power adapter 100, triggers a signal after judging it as no-load, the delay timer 4 automatically adds a time delay after receiving the signal from the current sensing device, and if no current change signal from the current sensing device is received within the time delay, it sends a trigger signal to the switch control device to control the power-off of the input end of the power adapter 100, thus realizing the automatic power-off of the power adapter 100 in the no-load state, not only reducing the electrical energy consumption loss of the electrical appliance, but also avoiding the risk of electrical appliance fire caused by possible short circuits.

[0020] The above time delay can be user-defined, such as 10 minutes, 20 minutes, 30 minutes, 40 minutes, 50 minutes, etc.

[0021] In this embodiment, the current sensing device includes a current sensing magnetic ring 2 and an induction chip 3 connected to each other. The current sensing magnetic ring 2 is used to sleeved on the output line of the power adapter 100. In actual production, the current sensing magnetic ring 2 can be flexibly sleeved on the output line of the power adapter 100. The induction chip 3 is connected to the power supply 1, and the output end of the induction chip 3 is connected to the input end of the delay timer 4. The induction chip 3 is used to monitor the current change and trigger a signal, and its micro-current threshold can be custom-set. When the threshold is reached, it is judged as no-load. Since the charging current sizes of different electrical appliances are different, the micro-current threshold can be determined separately according to different electrical appliances.

[0022] In this embodiment, the switch control device includes a control chip 5 connected to the power supply 1 and a level control switch 6. The level control switch 6 is also respectively connected to the output end of the control chip 5 and the input end of the power adapter 100. The output end of the delay timer 4 is connected to the input end of the control chip 5. After receiving the signal from the induction chip 3, the delay timer 4 automatically adds a time delay. If no current change signal from the induction chip 3 is received within the time delay, a trigger signal is sent to the control chip 5, and the control chip 5 sends a power-off signal to the high and low level control switch 6.

[0023] In this embodiment, both the induction chip 3 and the control chip 5 are single-chip microcomputers, and the power supply 1 is a button battery. The self-powered off protection device further includes a housing, and the button battery, the induction chip 3, the delay timer 4, the control chip 5, and the level control switch 6 are all arranged inside the housing.

[0024] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present invention, several improvements and replacements can be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A self-power-off protection device for a power adapter, characterized in that: It includes a power supply, a current sensing device electrically connected to the power supply, a delay timer and a switch control device, wherein the current sensing device is used to connect to the output end of the power adapter, the switch control device is used to connect to the input end of the power adapter, the input end of the delay timer is connected to the output end of the current sensing device, and the output end of the delay timer is connected to the input end of the switch control device.

2. The self-power-off protection device according to claim 1, characterized in that: The current sensing device includes a current sensing magnetic ring and a sensing chip connected to each other. The current sensing magnetic ring is used to sleeve the output line of the power adapter, the sensing chip is connected to the power supply, and the output end of the sensing chip is connected to the input end of the delay timer.

3. The self-power-off protection device according to claim 2, characterized in that: It comprises a shell, in which the power supply, the induction chip, the delay timer and the switch control device are all arranged.

4. The self-power-off protection device according to claim 2, characterized in that: The sensing chip is a single chip microcomputer.

5. The self-power-off protection device according to any one of claims 1 to 4, characterized in that: The switch control device includes a control chip and a level control switch connected to the power supply. The level control switch is also connected to the output end of the control chip and the input end of the power adapter respectively. The output end of the delay timer is connected to the input end of the control chip.

6. The self-power-off protection device according to claim 5, characterized in that: The control chip is a single chip microcomputer.

7. The self-power-off protection device according to any one of claims 1 to 4, characterized in that: The power source is a button battery.

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