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Method and terminal for protecting circuit board

A technology for protecting circuit boards and circuit boards, applied in the direction of protection against overcurrent, etc., can solve the problems of high price, small barrier effect, and excessive size, and achieve the effect of universality and improvement of survival probability.

Active Publication Date: 2016-04-13
XIAOMI INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] If the terminal accidentally falls into the water, even if the exposed part of the circuit board is covered with a rubber sleeve, when the water pressure is too high, the barrier effect is very small, and the circuit board will still be damaged due to a short circuit; Terminals with rubber sleeves are too large and expensive compared to conventional terminals. Therefore, ordinary users cannot afford them in terms of appearance or price. Therefore, this method of protecting circuit boards is not universal. sex

Method used

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  • Method and terminal for protecting circuit board
  • Method and terminal for protecting circuit board
  • Method and terminal for protecting circuit board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] An embodiment of the present invention provides a method for protecting a circuit board. The method is applied to a terminal, and the terminal includes: a circuit board, a power battery, an electromagnetic relay, and an elastic device. see figure 1 , the method flow provided by this embodiment includes:

[0039] 101: Use the groove of the circuit board to detect whether there is a short circuit, and the groove of the circuit board is located around the circuit board;

[0040] Optionally, a PMIC chip is included on the circuit board;

[0041] Use the notch of the board to detect short circuits, including but not limited to:

[0042] Detect whether the inner edge and outer edge of the groove of the circuit board are short-circuited through the pin connected to the PMIC chip on the circuit board through the groove of the circuit board, wherein the outer edge of the groove of the circuit board is grounded, and the inner edge is connected to the PMIC chip .

[0043] Opti...

Embodiment 2

[0053] An embodiment of the present invention provides a method for protecting a circuit board, the method is applied to a terminal, see figure 2 , the terminal includes: a circuit board, a power battery, an electromagnetic relay and an elastic device; wherein, the electromagnetic relay includes two contacts and a coil on the circuit board, and one contact of the electromagnetic relay and one end of the elastic device are respectively fixed on On the same side of the circuit board, the other contact of the electromagnetic relay is fixed on the shell of the power battery; the circuit board includes: PMIC chip, AP, normally closed switch and battery power supply; there are grooves around the circuit board, the circuit board The outer edge of the groove is grounded, and the inner edge is connected to the PMIC chip; the normally closed switch is connected to the coil of the electromagnetic relay, the AP and the battery power supply. Now, in combination with the above content, the...

Embodiment 3

[0072] An embodiment of the present invention provides a terminal for performing the method provided in the first or second embodiment above, see Figure 4 , the terminal includes:

[0073] A circuit board 41, a power battery 42, an electromagnetic relay 43 and an elastic device 44, the circuit board has a groove 411 around it, and the electromagnetic relay includes two contacts 431 and 432;

[0074] Wherein, one contact 431 of the electromagnetic relay 43 and one end of the elastic device 44 are respectively fixed on the same side of the circuit board 41 , and the other contact 432 of the electromagnetic relay 43 is fixed on the casing of the power battery 42 .

[0075] Optionally, when the two contacts 431 and 432 of the electromagnetic relay 43 pop open, the elastic device 44 is in a normal state, and the power battery 42 is electrically disconnected from the circuit board 41 .

[0076] Optionally, when the elastic device 44 is in a compressed state, the two contacts 431 a...

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PUM

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Abstract

The invention discloses a method and terminal for protecting a circuit board, and belongs to the technical field of electronic circuits. The method includes the steps that whether short out exists or not is detected by using grooves of the circuit board, and the grooves of the circuit board are located in the periphery of the circuit board; if the grooves of the circuit board are detected to be in a short out state, two contacts of an electromagnetic relay are triggered to bounce off, so that an elastic device can be in a normal state, wherein the electromagnetic relay comprises the two contacts, one contact of the electromagnetic relay and one end of the elastic device are fixed to the same side of the circuit board respectively, and the other contact of the electromagnetic relay is fixed to an outer shell of a battery of a power source; the elastic device enables the battery of the power source and the circuit board to bounce off, and the electrical connection between the battery of the power source and the circuit board is switched off. According to the method and terminal, when the grooves of the circuit board are detected to be in the short out state, the two contacts of electromagnetic relay are triggered to bounce off, the elastic device can be in the normal state, the elastic device enables the battery of the power source and the circuit board to bounce off, the electrical connection between the battery of the power source and the circuit board is switched off, and therefore damage to the circuit board due to short out can be avoided.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a method for protecting a circuit board and a terminal. Background technique [0002] With the continuous progress of society, terminals such as mobile phones have become an indispensable part of people's daily life. As an electronic product, the terminal is easy to short-circuit if water enters when the circuit board is powered on, resulting in excessive instantaneous current of the terminal circuit board, resulting in permanent damage to the terminal circuit board. Therefore, in order to prolong the service life of the terminal, how to protect the circuit board when the terminal is flooded has become a focus of attention. [0003] At present, the circuit board is usually protected by sealing the exposed part of the circuit board with a rubber sheath. When the terminal is flooded, due to the blocking effect of the rubber sleeve, water can be prevented from entering...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/08
Inventor 魏晓亮孙伟徐兵
Owner XIAOMI INC