CN203722216U - Mobile terminal protection circuit and mobile terminal - Google Patents
Mobile terminal protection circuit and mobile terminal Download PDFInfo
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- CN203722216U CN203722216U CN201420074432.2U CN201420074432U CN203722216U CN 203722216 U CN203722216 U CN 203722216U CN 201420074432 U CN201420074432 U CN 201420074432U CN 203722216 U CN203722216 U CN 203722216U
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- power supply
- infiltration
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000001514 detection method Methods 0.000 claims abstract description 21
- 230000008595 infiltration Effects 0.000 claims description 108
- 238000001764 infiltration Methods 0.000 claims description 108
- 238000012360 testing method Methods 0.000 claims description 62
- 230000001681 protective effect Effects 0.000 claims description 37
- 230000005484 gravity Effects 0.000 claims description 29
- 230000001133 acceleration Effects 0.000 claims description 15
- 239000004065 semiconductor Substances 0.000 claims description 7
- 238000003825 pressing Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 239000004744 fabric Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
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Abstract
The utility model relates to a circuit structure, and provides a mobile terminal protection circuit and a mobile terminal. The protection circuit is connected with an external power source. The protection circuit comprises a water seepage detection circuit, a switching circuit and a control circuit. The water seepage detection circuit is used to generate a water seepage signal in the mobile terminal water seepage condition and output the water seepage signal to the control circuit. The control circuit is used to send a power interruption signal to the switching circuit when the water seepage signal outputted by the water seepage detection circuit is received. The switching circuit is used to disconnect the electrical connection between the power end and the power supply end to stop the power supply from the power source to the mobile terminal when the power interruption signal is received by the control circuit. When the mobile terminal is in the working state, the water seepage detection circuit can be used to detect whether the mobile terminal is in the water seepage condition on a real-time basis, and if the mobile terminal is in the water seepage condition, the control circuit is used to control the switching circuit to stop the power supply from the power source to the mobile terminal.
Description
Technical field
The utility model relates to circuit structure, relates in particular to a kind of protective circuit for mobile terminal and mobile terminal.
Background technology
Along with the develop rapidly of integrated circuit technique, the disposal ability of mobile terminal strengthens gradually, and mobile terminal has been become the equipment of an integrated information processing from simple call instrument; Wherein, described mobile terminal can comprise that mobile phone, notebook, panel computer etc. can use the equipment of mobile communications network.
At present, mobile terminal does not have water-proof function.When mobile terminal work, the power supply meeting continued power in mobile terminal, if mobile terminal is fallen in water accidentally, the water that pours into mobile terminal inside can cause corrosion sulfuration or the short circuit of electronic device, causes mobile terminal can not continue to use.
Utility model content
The purpose of this utility model is to provide a kind of protective circuit for mobile terminal, does not have the problem of the power-off protection function after infiltration to solve existing mobile terminal.
First aspect, the utility model provides a kind of protective circuit for mobile terminal, external power supply, described circuit comprises infiltration testing circuit, switching circuit and control circuit;
Described infiltration testing circuit has detection output, and the testing circuit that seeps water described in the time of the infiltration of described mobile terminal produces infiltration signal, and exports described infiltration signal from described detection output;
Described switching circuit has power end, feeder ear and controlled end, the external described power supply of described power end, described feeder ear is electrically connected with the circuit board of described mobile terminal, in the time that described switching circuit receives power supply signal by described controlled end from described control circuit, described switching circuit set up described power end with the electrical connection of described feeder ear to be communicated with the power supply of described power supply to described mobile terminal, in the time that described switching circuit receives power-off signal by described controlled end from described control circuit, what described switching circuit disconnected described power end and feeder ear is electrically connected to stop the power supply of described power supply to described mobile terminal,
Described control circuit has infiltration test side and control end, described infiltration test side is connected with the detection output of described infiltration testing circuit, described control end is connected with the controlled end of described switching circuit, in the time that described control circuit receives the described infiltration signal of described infiltration testing circuit output by described infiltration test side, described control circuit sends described power-off signal by described control end to described switching circuit.
In conjunction with first aspect, in the possible implementation of the first of first aspect, described protective circuit also comprises boot-strap circuit;
Described boot-strap circuit has first end and the second end, described first end is connected with power end and the feeder ear of described switching circuit respectively with described the second end, in the time that described boot-strap circuit receives boot action, trigger starting-up signal, and send starting-up signal so that described control circuit sends described power supply signal to described switching circuit to described control circuit.
In conjunction with the possible implementation of the first of first aspect or first aspect, in the possible implementation of the second of first aspect, described switching circuit comprises switching tube;
Hot end, cold end and the controlled end of described switching tube is respectively power end, feeder ear and the controlled end of described switching circuit.
In conjunction with the possible implementation of the second of the possible implementation of the first of first aspect or first aspect or first aspect, in the third possible implementation of first aspect, described switching tube is metal-oxide-semiconductor;
Drain electrode, source electrode and the grid of described metal-oxide-semiconductor is respectively hot end, cold end and the controlled end of described switching tube.
In conjunction with the third possible implementation of the possible implementation of the second of the possible implementation of the first of first aspect or first aspect or first aspect or first aspect, in the 4th kind of possible implementation of first aspect, described infiltration testing circuit comprises the first power supply, the first resistance, the second resistance, holding wire and ground wire, the first end of described the first resistance and the second end are connected respectively the first end of described the first power supply and described the second resistance, the second end ground connection of described the second resistance, one end of described holding wire is connected with the tie point of described the second resistance with described the first resistance, described ground wire grounded, described ground wire is connected with the second end of described the second resistance,
Described control circuit is connected with the tie point of described the second resistance with described the first resistance, and the tie point of described the first resistance and described the second resistance is described detection output.
In conjunction with the third possible implementation of the possible implementation of the second of the possible implementation of the first of first aspect or first aspect or first aspect or first aspect or the 4th kind of possible implementation of first aspect, in the 5th kind of possible implementation of first aspect, described holding wire and described ground wire are: two wires arranging respectively on the top layer of printed circuit board (PCB) and/or flexible PCB.
In conjunction with the 4th kind of possible implementation of the third possible implementation of the possible implementation of the second of the possible implementation of the first of first aspect or first aspect or first aspect or first aspect or first aspect or the 5th kind of possible implementation of first aspect, in the 6th kind of possible implementation of first aspect, the marginal position on the parallel top layer that is arranged in described printed circuit board (PCB) and/or flexible PCB of described holding wire and described ground wire.
In conjunction with the 5th kind of possible implementation of the 4th kind of possible implementation of the third possible implementation of the possible implementation of the second of the possible implementation of the first of first aspect or first aspect or first aspect or first aspect or first aspect or first aspect or the 6th kind of possible implementation of first aspect, in the 7th kind of possible implementation of first aspect, the parallel interface periphery that is arranged in described mobile terminal of described holding wire and described ground wire.
In conjunction with the 6th kind of possible implementation of the 5th kind of possible implementation of the 4th kind of possible implementation of the third possible implementation of the possible implementation of the second of the possible implementation of the first of first aspect or first aspect or first aspect or first aspect or first aspect or first aspect or first aspect or the 7th kind of possible implementation of first aspect, in the 8th kind of possible implementation of first aspect, described protective circuit is external gravity sensor also; Described control circuit is also controlled being electrically connected between described the first power supply and described holding wire;
Described gravity sensor is connected with described control circuit, and the signal of telecommunication that is loaded with gravity acceleration value to the output of described control circuit in the time that described mobile terminal falls is to make described in described control circuit conducting the first power supply to the power supply of described holding wire.
In conjunction with the 7th kind of possible implementation of the 6th kind of possible implementation of the 5th kind of possible implementation of the 4th kind of possible implementation of the third possible implementation of the possible implementation of the second of the possible implementation of the first of first aspect or first aspect or first aspect or first aspect or first aspect or first aspect or first aspect or first aspect or the 8th kind of possible implementation of first aspect, in the 9th kind of possible implementation of first aspect, described boot-strap circuit comprises: the interlock button with key and electronic cutting key,
The first end that the first end of described electronic cutting key and the second end are described boot-strap circuit and the second end.
Second aspect, the utility model provides a kind of mobile terminal, comprises power supply, and described mobile terminal also comprises the above-mentioned protective circuit for mobile terminal; Wherein, the external described power supply of described protective circuit.
The beneficial effects of the utility model: in the time that mobile terminal is in running order, whether can detect in real time mobile terminal by infiltration testing circuit seeps water, if infiltration testing circuit detects mobile terminal infiltration, control circuit can send power-off signal to switching circuit so that switching circuit can deenergization to the power supply of mobile terminal.Thereby can avoid mobile terminal work in the time of infiltration, realize software and hardware protection when mobile terminal is seeped water.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the first circuit structure diagram of the protective circuit for mobile terminal that provides of the utility model embodiment;
Fig. 2 is the second circuit structure diagram of the protective circuit for mobile terminal that provides of the utility model embodiment;
Fig. 3 is the first circuit diagram of the protective circuit for mobile terminal that provides of the utility model embodiment;
Fig. 4 is the second circuit diagram of the protective circuit for mobile terminal that provides of the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.For technical scheme described in the utility model is described, describe below by specific embodiment.
In embodiments of the present invention, power supply is for the circuit board power supply to mobile terminal, to the circuit supply on this circuit board, realize power supply to the power supply of mobile terminal to drive mobile terminal work.Circuit on the circuit board of mobile terminal comprises voltage-regulating circuit and the protective circuit for mobile terminal; adjust the power supply signal of different voltage magnitudes by this voltage-regulating circuit; adjust the required power supply signal of control circuit with to the described power supply of the control circuit that protective circuit was comprised for mobile terminal, separately also adjust the first power supply.Wherein, described the first power supply is for powering to infiltration testing circuit, and the testing circuit that seeps water while infiltration with mobile terminal is exported described infiltration signal.
Fig. 1 shows the composition structure of the protective circuit for mobile terminal that the utility model embodiment provides, and for convenience of explanation, only shows the part relevant to the utility model embodiment, and details are as follows.
The protective circuit for mobile terminal that the embodiment of the present invention provides, external power supply, comprises infiltration testing circuit 2, switching circuit 1 and control circuit 3.
Wherein, infiltration testing circuit 2 has detection output; In the time of described mobile terminal infiltration, infiltration testing circuit 2 produces infiltration signal, and exports described infiltration signal from detecting output.
Wherein, switching circuit 1 has power end, feeder ear and controlled end, the external described power supply of its power end, and its feeder ear is electrically connected with the circuit board of described mobile terminal; In the time that switching circuit 1 receives power supply signal by controlled end from control circuit 3, switching circuit 1 is set up being electrically connected of power end and feeder ear, to be communicated with the power supply of described power supply to described mobile terminal; In the time that switching circuit 1 receives power-off signal by controlled end from control circuit 3, switching circuit 1 deenergization end is electrically connected with feeder ear, to stop the power supply of described power supply to described mobile terminal.
Wherein, control circuit 3 has infiltration test side and control end, and its infiltration test side is connected with the detection output of infiltration testing circuit 2, and its control end is connected with the controlled end of switching circuit 1; When control circuit 3 by infiltration test side receive infiltration testing circuit 2 export described infiltration signal time, control circuit 3 sends described power-off signal by control end to switching circuit 1.
Like this, in the time that user presses key startup mobile terminal, the control circuit 3 of mobile terminal detects starting-up signal and sends power supply signal to switching circuit 1, switching circuit 1 is communicated with the circuit board of described power supply and described mobile terminal, described power supply is powered to described circuit board, ensure that user unclamps after key, power supply can continue the circuit board power supply to described mobile terminal by switching circuit 1, completes the machine that normally opens of mobile terminal.
After standby communication terminal startup work, for avoiding unexpected infiltration to cause the damage of the internal circuit of mobile terminal, the mobile terminal in the utility model embodiment comprises infiltration testing circuit 2; This infiltration testing circuit 2 utilizes water can cause the principle of impedance variation, change in voltage on the holding wire comprising by this infiltration testing circuit 2 of real-time detection, whether the internal circuit of Real-Time Monitoring mobile terminal has water to exist, for example: if mobile terminal infiltration, the voltage on holding wire can become low level from high level.When the internal circuit of mobile terminal causes the change in voltage on holding wire because of infiltration, be this infiltration testing circuit 2 and produce infiltration signal.
In addition, between external described power supply and the circuit board of mobile terminal, added switching circuit 1, switching circuit 1 receives the power supply signal of power supply output by power end, and powers to mobile terminal from the feeder ear of switching circuit 1; Meanwhile, this switching circuit 1 receives power supply signal or power-off signal by controlled end, controls the power supply to mobile terminal of whether conducting or deenergization.Like this, if the infiltration of described mobile terminal, control circuit 3 can receive the infiltration signal that infiltration testing circuit 2 sends, and control circuit 3 sends power-off signal to switching circuit 1 then, and switching circuit 1 deenergization is to the power supply of mobile terminal.
Thereby, after mobile terminal works on power, whether meet water by the internal circuit of mobile terminal described in infiltration testing circuit 2 Real-Time Monitorings, if internal electrical is met water on the way, control circuit 3 control switch circuit 1 deenergizations are to the power supply of mobile terminal; Increase the infiltration defencive function of mobile terminal.Need emphasize, in the time that mobile terminal seeps water, by switching circuit 1 completely deenergization to the power supply of whole mobile terminal; And then the internal circuit of mobile terminal can not continue charged work, realize the protection of the internal circuit to mobile terminal; after mobile terminal after seeping water dries again; this mobile terminal can continue normal use, has extended the useful life of mobile terminal, has saved physical resources.
In another embodiment of the utility model, infiltration testing circuit 2 is to adopt impedance detection technology to realize, in the time that mobile terminal seeps water, the holding wire of infiltration testing circuit 2 can pass through water ground connection, thereby cause holding wire to change to the impedance on ground, cause the level on holding wire to reduce, thereby control circuit 3 can receive the low level signal that infiltration testing circuit 2 produces, this low level signal can be described infiltration signal.
In another embodiment of the utility model, control circuit 3 comprises controller and peripheral circuit; In the time that mobile terminal seeps water, described controller receives the low level described infiltration signal that infiltration testing circuit 2 is exported, if the magnitude of voltage of this low level described infiltration signal, lower than reference voltage level, sends described power-off signal to switching circuit 1; Described reference voltage level detects test result according to infiltration to be determined.
In another embodiment of the utility model, control circuit 3 is: the circuit that comprises the compositions such as comparator, integrated chip and/or components and parts.And then as: when as described in control circuit 3 receives low level that infiltration testing circuit 2 exports when infiltration signal, if the magnitude of voltage of this low level described infiltration signal lower than reference voltage level (in like manner, described reference voltage level detects test result according to infiltration to be determined), control circuit 3 is by exporting described power-off signal with the device such as door, not gate or comparator to switching circuit 1; Preferably, the required level of power supply (described power supply is to the power supply of the circuit board of mobile terminal) that the level of described power-off signal disconnects described power supply according to trigger switch circuit 1 is determined, as switching circuit 1 need to receive high level as described in power-off signal power supply to mobile terminal with deenergization, mobile terminal when infiltration control circuit 3 is exported the described power-off signal of high level.
Fig. 2 shows the composition structure of the protective circuit for mobile terminal that the utility model embodiment provides, and for convenience of explanation, only shows the part relevant to the utility model embodiment, and details are as follows.
In another embodiment of the utility model, the described protective circuit for mobile terminal also comprises boot-strap circuit 4;
Boot-strap circuit 4 has first end and the second end, and its first end and its second end are respectively with the power end of switching circuit 1 with feeder ear is corresponding is connected; In the time receiving boot action, trigger starting-up signal, send starting-up signal to control circuit 3 and send described power supply signal with control circuit 3 to switching circuit 1.
Particularly, mobile terminal is provided with key, in the time that user presses the key (boot action) in boot-strap circuit 4, power supply power supply to mobile terminal by power supply signal end described in meeting conducting, simultaneously, boot-strap circuit 4 can detect boot action and trigger starting-up signal, and this starting-up signal is sent to control circuit 3 by boot-strap circuit 4; Control circuit 3 sends power supply signal to switching circuit 1 after receiving this starting-up signal, and switching circuit 1 is communicated with the power supply of power supply to mobile terminal, and continued power is provided.And then even when user unclamps the key of pressing, when key is not pressed, power supply can continue to power to mobile terminal by switching circuit 1; By the of short duration power supply of boot-strap circuit and the continued power of switching circuit 1, ensure the normal power supply of mobile terminal, start mobile terminal.
Preferably, boot-strap circuit 4 comprises: the interlock button that comprises key and electronic cutting key;
The first end of described electronic cutting key and the second end are first end and second end of boot-strap circuit 4.
Particularly, when pressing the key in interlock button, electronic cutting key also can be pressed, thereby the described power supply of the crucial connection of described electronic cutting is to the power supply of mobile terminal, starts to start mobile terminal; Meanwhile, the control circuit 3 in mobile terminal can send power supply signal with the power supply circuits conducting to described mobile terminal by described power supply to switching circuit 1, realizes power supply and continues the power supply to mobile terminal.And then even when user unclamps the key (being that key does not keep the state being pressed) of pressing, power supply can continue, to mobile terminal power supply, to ensure to complete the start-up operation of mobile terminal in the situation that of normal power supply by the switching circuit of conducting 1.
Preferably, boot-strap circuit 4 is made up of key and relay switch; The first end of the switch in described relay switch and the second end are first end and second end of boot-strap circuit 4.
In the time that user presses key, the coil circuit conducting in relay switch also generates an electromagnetic field with the switch in attracting electric relay switch, carries out, and power supply can directly power to start mobile terminal by the switch in relay switch to mobile terminal.When mobile terminal starts, the control circuit 3 in mobile terminal can send power supply signal with the power supply circuits conducting to described mobile terminal by described power supply to switching circuit 1, realizes power supply and continues the power supply to mobile terminal.And then even when user unclamps the key (being that key does not keep the state being pressed) of pressing, power supply can continue, to mobile terminal power supply, to ensure to complete the start-up operation of mobile terminal in the situation that of normal power supply by the switching circuit of conducting 1.
Fig. 3 shows the physical circuit of the protective circuit for mobile terminal that the utility model embodiment provides, and for convenience of explanation, only shows the part relevant to the utility model embodiment, and details are as follows.
Preferably, switching circuit 1 comprises switching tube;
Hot end, cold end and the controlled end of described switching tube is respectively power end, feeder ear and the controlled end of switching circuit 1.
It should be noted that, described switching tube comprises: metal-oxide-semiconductor, triode etc. have transistor or the chip of controllable function.In the time of concrete application, if mobile terminal infiltration, switching tube meeting deenergization is to the power supply of mobile terminal; If mobile terminal does not seep water and normally works, switching tube keeps the operating state of turn-on power to the power supply of mobile terminal; Then according to the need of work of switching tube, determine in the time that mobile terminal seeps water or the time of infiltration control circuit 3 control signal that need send to the controlled end of switching tube.For example: be defined as: when infiltration, control circuit 3 sends the control signal of high level to the controlled end of switching tube; Meanwhile, be defined as: while infiltration, control circuit 3 sends low level control signal to the controlled end of switching tube.
Preferably, described switching tube is metal-oxide-semiconductor;
Drain electrode, source electrode and the grid of described metal-oxide-semiconductor is respectively hot end, cold end and the controlled end of described switching tube.
And then, in the time that described switching tube adopts NMOS pipe, need control circuit 3 after receiving starting-up signal, to export the power supply signal of high level to switching circuit 1, thereby, even when user unclamps the key (being that key does not keep the state being pressed) of pressing, power supply can continue to mobile terminal power supply, mobile terminal work by the NMOS pipe of conducting.In the time that mobile terminal seeps water, infiltration testing circuit 2 sends described infiltration signal to control circuit 3, and then control circuit 3 sends low level described power-off signal to switching circuit 1, and NMOS manages cut-off, and NMOS pipe deenergization is to the power supply of mobile terminal.
In like manner, in the time that described switching tube adopts PMOS pipe, need control circuit 3 power supply signal to switching circuit 1 output low level after receiving starting-up signal, even thereby when user unclamps the key (being that key does not keep the state being pressed) of pressing, power supply can continue to mobile terminal power supply, mobile terminal work by the PMOS pipe of conducting.In the time that mobile terminal seeps water, infiltration testing circuit 2 sends described infiltration signal to control circuit 3, and then control circuit 3 sends the described power-off signal of high level to switching circuit 1, and PMOS manages cut-off, and PMOS pipe deenergization is to the power supply of mobile terminal.
Fig. 4 shows the physical circuit of the protective circuit for mobile terminal that the utility model embodiment provides, and for convenience of explanation, only shows the part relevant to the utility model embodiment, and details are as follows.
Preferably, infiltration testing circuit 2 comprises: the first power supply, the first resistance R 1, the second resistance R 2, holding wire 21 and ground wire 22; Wherein, described the first power supply is: described power supply to the circuit board power supply of mobile terminal (described power supply is to the circuit supply on the circuit board of mobile terminal) afterwards, carries out through voltage-regulating circuit (being contained in the circuit on the circuit board of mobile terminal) power supply providing after voltage adjustment to described power supply.
Wherein, the first end of described the first resistance R 1 and the second end connect respectively the first end of described the first power supply and described the second resistance R 2, the second end ground connection of described the second resistance R 2, holding wire 21(is for example: one end of holding wire 21) connect the second end (i.e. tie point of the first resistance R 1 and the second resistance R 2 of described the first resistance R 1, also be the end that is connected in series forming after the first resistance R 1 is connected with the second resistance R 2), described holding wire 21 connects the detection output of infiltration testing circuit 2, ground wire 22 ground connection, ground wire 22 is connected with the second end of described the second resistance R 2.It should be noted that, holding wire 21 can be circulus or linear structure, if holding wire 21 is linear structure, wire size line 21 is except being connected with the tie point of described the first resistance R 1 and the second resistance R 2, and other end on wire size line 21 all connects state in sky.
Specifically, in infiltration testing circuit 2, adopt the first resistance R 1 and the second resistance R 2 to carry out dividing potential drop to the power supply signal of described the first power supply output; Meanwhile, be connected in series end (i.e. the second end of the first resistance R 1, also i.e. the first end of the second resistance R 2) outer signal line 21 from the first resistance R 1 and the second resistance R 2.In the time that mobile terminal does not seep water, the potential value of holding wire 21 is the potential value of the first end of the second resistance R 2.In the time that mobile terminal seeps water, holding wire 21 is connected with ground wire 22 by water, and then the lower voltage on holding wire 21, produces low level described infiltration signal.
(the first resistance R 1 forms after connecting with the second resistance R 2 is connected in series end for the tie point of control circuit 3 and the first resistance R 1 and the second resistance R 2, also be one end of holding wire 21) be connected, the tie point of described the first resistance R 1 and described the second resistance R 2 is the detection output of infiltration testing circuit 2.Like this, while causing described holding wire 21 with described ground wire 22 short circuit in described mobile terminal infiltration, detect low level described infiltration signal by described holding wire 21.
Particularly, in the time of described mobile terminal infiltration, can cause described holding wire 21 and described ground wire 22 short circuits, and then holding wire 21 can produce low level described infiltration signal; Then, control circuit 3 can detect low level described infiltration signal by holding wire 21.
And then control circuit 3 sends described power-off signal to switching circuit 1, switching circuit 1 deenergization is to the power supply of mobile terminal.When effectively having protected power supply, also prevent that the circuit that mobile terminal comprises from working under short-circuit condition, and then prevented from damaging the circuit that mobile terminal comprises.Like this, after the water of mobile terminal is removed, the circuit of mobile terminal is excellent, still can normally use.And then the mobile terminal after infiltration, dry after water still can normal boot-strap work.
Preferably, whether described the first power supply powers to holding wire 21, is controlled by control circuit 3.In the time that control circuit 3 sends the signal of telecommunication that starts infiltration testing circuits 2 to the first power supply, the first power supply is powered to the first resistance R 1 and second resistance R 2 of series connection, and then to the power supply of holding wire 21.In order to save electric energy, the testing circuit 2 of can selecting usually time to stop seeping water is worked, and does not send the signal of telecommunication that starts infiltration testing circuit 2.
Preferably, holding wire 21 and ground wire 22 are: at the top layer of printed circuit board (PCB) and/or flexible PCB two cablings of cloth respectively.
And then, for infiltration situation is carried out to specific aim protection, can, above the top layer on printed circuit board (PCB) and/or flexible PCB, walk two parallel cablings, one is that 21, one of holding wires are ground wire 22.Preferably, holding wire 21 and ground wire 22 are copper cash, and exposed in air.
Wherein, in order to realize mobile terminal when infiltration, mobile terminal each infiltration detection place all can obtain identical speed, detect fast, by parallel to holding wire 21 and ground wire 22.Separately need according to wiring and seep water and detect the needs of speed, determining the spacing of holding wire 21 and ground wire 22.
Preferably, holding wire 21 and the marginal position of the parallel cloth of ground wire 22 on the top layer of described printed circuit board (PCB) and/or flexible PCB.
Like this, in order to avoid damaging the circuit on the circuit board of mobile terminal in the time that mobile terminal seeps water, can produce rapidly infiltration signal, the edge on the top layer of described printed circuit board (PCB) and/or flexible PCB, is evenly equipped with parallel holding wire 21 and ground wire 22.In the time that mobile terminal seeps water, can infiltration signal be detected rapidly by holding wire.
It should be noted that, the marginal position on the top layer of described printed circuit board (PCB) and/or flexible PCB comprises: on the circuit board top layer of mobile terminal, have empty peripheral position.
Preferably, holding wire 21 and the interface periphery of the parallel cloth of ground wire 22 on the top layer of described printed circuit board (PCB) and/or flexible PCB.
In another embodiment of the utility model, the described protective circuit for mobile terminal is external gravity sensor also; Preferably, this external end sensor can be the gravity sensor of mobile terminal configuration, and this gravity sensor can Real-time Collection acceleration of gravity and is sent to the control circuit 3 of mobile terminal.
Described gravity sensor, is connected with the gravity test side of control circuit 3; Like this, in the time that described mobile terminal falls, described gravity sensor is loaded with the signal of telecommunication of gravity acceleration value to control circuit 3 outputs; Described control circuit is at the signal of telecommunication that receives this and be loaded with gravity acceleration value, can conducting described in the first power supply power to the first resistance R 1 and second resistance R 2 of series connection, and then conducting is to the power supply of holding wire 21.In order to save electric energy, usually in the time not receiving this signal of telecommunication that is loaded with gravity acceleration value (representing: mobile terminal is the state in falling not), described control circuit can disconnect described the first power supply and power to the first resistance R 1 and second resistance R 2 of series connection, and then disconnecting the power supply to holding wire 21, the testing circuit 2 that stops seeping water is worked.
Like this, in the time that mobile terminal falls, the acceleration of gravity of mobile terminal increases, and triggers described gravity sensor and produces the signal of telecommunication that is loaded with gravity acceleration value; When circuit 3 to be controlled receives the signal of telecommunication that this is loaded with gravity acceleration value, can analyze the gravity acceleration value after increase.And then the signal of telecommunication that control circuit 3 sends startup infiltration testing circuit 2 is to the first power supply, powers, to realize to the power supply of holding wire 21 with the first power supply to the first resistance R 1 and second resistance R 2 of series connection; Whether start infiltration testing circuit 2 seeps water with Real-Time Monitoring mobile terminal.
In another embodiment of the present utility model, in the time that mobile phone falls, gravity sensor monitors the gravity acceleration value after increase and the gravity acceleration value carrying after increase is sent to control circuit 3.Control circuit 3 is controlled mobile terminal screen locking, send to the first power supply the signal of telecommunication that starts infiltration testing circuit 2 simultaneously, the first power supply is powered to the first resistance R 1 and second resistance R 2 of series connection in infiltration testing circuit 2, and then realizes the power supply of the holding wire 21 in testing circuit 2 to infiltration.The signal of telecommunication of control circuit 3 Real-time Collection holding wires 21, the signal of telecommunication when signal of telecommunication collecting and mobile terminal are not seeped water carries out voltage-contrast, to judge whether mobile terminal seeps water; The voltage of the voltage of the signal of telecommunication collecting when infiltration particularly, signal of telecommunication when not seeping water.If mobile terminal infiltration, sends power-off signal power supply to mobile terminal with switching circuit 1 deenergization to control circuit 3 to switching circuit 1.
For example, when the gravity acceleration value receiving from gravity sensor when control circuit 3 returns to normal range (NR) (: 0.95g is to 1.05g), control circuit 3 continues the acceleration of gravity that monitoring receives from gravity sensor in Preset Time section; If the acceleration of gravity receiving has exceeded this Preset Time section in the time of normal range (NR), control circuit 3 unlock screens, and stop the power supply of the first power supply to infiltration testing circuit 2.Easily start the detection of seep water of infiltration testing circuit 2 in time period of infiltration thereby realize at mobile terminal, normally use the infiltration detection of the testing circuit 2 that stops in time period of mobile terminal seeping water; Separately, in realizing infiltration detection, can save the electric energy of mobile terminal, extend the effective storage life of power supply.
As the utility model one embodiment, the utility model also provides a kind of mobile terminal, comprises power supply, and described mobile terminal also comprises the protective circuit for mobile terminal that above-described embodiment provides;
Wherein, the external described power supply of the described protective circuit for mobile terminal.
Wherein, described mobile terminal comprises the equipment of the Internet removable uses such as mobile phone, notebook, panel computer, accessible or mobile radio communication.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field; make without departing from the concept of the premise utility some alternative or obvious modification that are equal to; and performance or purposes identical, all should be considered as belonging to the utility model by the definite scope of patent protection of submitted to claims.
Claims (11)
1. for a protective circuit for mobile terminal, external power supply, is characterized in that, described circuit comprises infiltration testing circuit, switching circuit and control circuit;
Described infiltration testing circuit has detection output, and the testing circuit that seeps water described in the time of the infiltration of described mobile terminal produces infiltration signal, and exports described infiltration signal from described detection output;
Described switching circuit has power end, feeder ear and controlled end, the external described power supply of described power end, described feeder ear is electrically connected with the circuit board of described mobile terminal, in the time that described switching circuit receives power supply signal by described controlled end from described control circuit, described switching circuit set up described power end with the electrical connection of described feeder ear to be communicated with the power supply of described power supply to described mobile terminal, in the time that described switching circuit receives power-off signal by described controlled end from described control circuit, what described switching circuit disconnected described power end and feeder ear is electrically connected to stop the power supply of described power supply to described mobile terminal,
Described control circuit has infiltration test side and control end, described infiltration test side is connected with the detection output of described infiltration testing circuit, described control end is connected with the controlled end of described switching circuit, in the time that described control circuit receives the described infiltration signal of described infiltration testing circuit output by described infiltration test side, described control circuit sends described power-off signal by described control end to described switching circuit.
2. the protective circuit for mobile terminal according to claim 1, is characterized in that, described protective circuit also comprises boot-strap circuit;
Described boot-strap circuit has first end and the second end, described first end is connected with power end and the feeder ear of described switching circuit respectively with described the second end, in the time that described boot-strap circuit receives boot action, trigger starting-up signal, and send starting-up signal so that described control circuit sends described power supply signal to described switching circuit to described control circuit.
3. the protective circuit for mobile terminal according to claim 1 and 2, is characterized in that, described switching circuit comprises switching tube;
Hot end, cold end and the controlled end of described switching tube is respectively power end, feeder ear and the controlled end of described switching circuit.
4. the protective circuit for mobile terminal according to claim 3, is characterized in that, described switching tube is metal-oxide-semiconductor;
Drain electrode, source electrode and the grid of described metal-oxide-semiconductor is respectively hot end, cold end and the controlled end of described switching tube.
5. the protective circuit for mobile terminal according to claim 1 and 2, it is characterized in that, described infiltration testing circuit comprises the first power supply, the first resistance, the second resistance, holding wire and ground wire, the first end of described the first resistance and the second end are connected respectively the first end of described the first power supply and described the second resistance, the second end ground connection of described the second resistance, one end of described holding wire is connected with the tie point of described the second resistance with described the first resistance, described ground wire grounded, described ground wire is connected with the second end of described the second resistance;
Described control circuit is connected with the tie point of described the second resistance with described the first resistance, and the tie point of described the first resistance and described the second resistance is described detection output.
6. the protective circuit for mobile terminal according to claim 5, is characterized in that, described holding wire and described ground wire are: two wires arranging respectively on the top layer of printed circuit board (PCB) and/or flexible PCB.
7. the protective circuit for mobile terminal according to claim 6, is characterized in that, the marginal position on the parallel top layer that is arranged in described printed circuit board (PCB) and/or flexible PCB of described holding wire and described ground wire.
8. the protective circuit for mobile terminal according to claim 6, is characterized in that, the parallel interface periphery that is arranged in described mobile terminal of described holding wire and described ground wire.
9. the protective circuit for mobile terminal according to claim 5, is characterized in that, described protective circuit is external gravity sensor also; Described control circuit is also controlled being electrically connected between described the first power supply and described holding wire;
Described gravity sensor is connected with described control circuit, and the signal of telecommunication that is loaded with gravity acceleration value to the output of described control circuit in the time that described mobile terminal falls is to make described in described control circuit conducting the first power supply to the power supply of described holding wire.
10. the protective circuit for mobile terminal according to claim 2, is characterized in that, described boot-strap circuit comprises: the interlock button with key and electronic cutting key;
The first end that the first end of described electronic cutting key and the second end are described boot-strap circuit and the second end.
11. 1 kinds of mobile terminals, comprise power supply, it is characterized in that, described mobile terminal also comprises the arbitrary described protective circuit for mobile terminal of claim 1 to 10;
Wherein, the external described power supply of described protective circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420074432.2U CN203722216U (en) | 2014-02-20 | 2014-02-20 | Mobile terminal protection circuit and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420074432.2U CN203722216U (en) | 2014-02-20 | 2014-02-20 | Mobile terminal protection circuit and mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203722216U true CN203722216U (en) | 2014-07-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420074432.2U Expired - Lifetime CN203722216U (en) | 2014-02-20 | 2014-02-20 | Mobile terminal protection circuit and mobile terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203722216U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104598848A (en) * | 2015-02-11 | 2015-05-06 | 山东诺安诺泰信息***有限公司 | Waterproof protecting system for notebook computer |
| CN106546068A (en) * | 2016-11-09 | 2017-03-29 | 青岛海信移动通信技术股份有限公司 | A kind of furnace drying method and waterproof terminal of waterproof terminal |
| CN106603760A (en) * | 2016-12-06 | 2017-04-26 | 上海斐讯数据通信技术有限公司 | Water-in automatic protection circuit and method for achieving same |
| WO2019096142A1 (en) * | 2017-11-14 | 2019-05-23 | 华为技术有限公司 | Charging device and charging system |
| CN111109780A (en) * | 2019-12-31 | 2020-05-08 | 歌尔科技有限公司 | Wristband equipment and immersion liquid detection method thereof |
| CN112103917A (en) * | 2020-09-29 | 2020-12-18 | 青岛海信移动通信技术股份有限公司 | Electronic equipment and water inlet protection method |
-
2014
- 2014-02-20 CN CN201420074432.2U patent/CN203722216U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104598848A (en) * | 2015-02-11 | 2015-05-06 | 山东诺安诺泰信息***有限公司 | Waterproof protecting system for notebook computer |
| CN106546068A (en) * | 2016-11-09 | 2017-03-29 | 青岛海信移动通信技术股份有限公司 | A kind of furnace drying method and waterproof terminal of waterproof terminal |
| CN106603760A (en) * | 2016-12-06 | 2017-04-26 | 上海斐讯数据通信技术有限公司 | Water-in automatic protection circuit and method for achieving same |
| WO2019096142A1 (en) * | 2017-11-14 | 2019-05-23 | 华为技术有限公司 | Charging device and charging system |
| US11249143B2 (en) | 2017-11-14 | 2022-02-15 | Huawei Technologies Co., Ltd. | Charging apparatus and charging system |
| CN111109780A (en) * | 2019-12-31 | 2020-05-08 | 歌尔科技有限公司 | Wristband equipment and immersion liquid detection method thereof |
| CN112103917A (en) * | 2020-09-29 | 2020-12-18 | 青岛海信移动通信技术股份有限公司 | Electronic equipment and water inlet protection method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
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Effective date of registration: 20171114 Address after: Metro Songshan Lake high tech Industrial Development Zone, Guangdong Province, Dongguan City Road 523808 No. 2 South Factory (1) project B2 -5 production workshop Patentee after: Huawei terminal (Dongguan) Co.,Ltd. Address before: 518000 Building 2, B District, Bantian HUAWEI base, Longgang District, Shenzhen, Guangdong Patentee before: HUAWEI DEVICE Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
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Address after: 523808 Southern Factory Building (Phase I) Project B2 Production Plant-5, New Town Avenue, Songshan Lake High-tech Industrial Development Zone, Dongguan City, Guangdong Province Patentee after: HUAWEI DEVICE Co.,Ltd. Address before: 523808 Southern Factory Building (Phase I) Project B2 Production Plant-5, New Town Avenue, Songshan Lake High-tech Industrial Development Zone, Dongguan City, Guangdong Province Patentee before: Huawei terminal (Dongguan) Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210423 Address after: Unit 3401, unit a, building 6, Shenye Zhongcheng, No. 8089, Hongli West Road, Donghai community, Xiangmihu street, Futian District, Shenzhen, Guangdong 518040 Patentee after: Honor Device Co.,Ltd. Address before: Metro Songshan Lake high tech Industrial Development Zone, Guangdong Province, Dongguan City Road 523808 No. 2 South Factory (1) project B2 -5 production workshop Patentee before: HUAWEI DEVICE Co.,Ltd. |
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Granted publication date: 20140716 |
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