CN202495743U - Water falling automatic detecting device for mobile electronic terminal product - Google Patents

Abstract

The utility model discloses a water falling automatic detecting device for a mobile electronic terminal product. The water falling automatic detecting device is arranged inside a shell of the mobile electronic terminal product, the shell is further provided with a battery, a power module, a central processing module, a water falling trigger module, and a switch module, wherein the water falling trigger module and the switch module are connected with the central processing module respectively; one end of the water falling trigger module penetrates through the shell and is communicated with the outside; and an input end of the switch module is connected with the battery, and the output end of the switch module is connected with the power module. When a water falling situation is encountered by the mobile electronic terminal product, a detecting circuit of the water falling trigger module is connected through the electrical conductivity of water, an interrupt signal is generated and sent to the central processing module, the switch module can be controlled by the central processing module to cut off a path between the battery and the power module, and the power of the mobile electronic terminal product is disconnected timely before water enters the inside of the mobile electronic terminal product.

Description

The drowning automatic detection device that is used for the mobile electronic terminal product

Technical field

The utility model relates to the drowning detection technique of mobile electronic terminal product, more particularly relates to a kind of drowning automatic detection device that is used for the mobile electronic terminal product.

Background technology

Along with constantly popularizing of consumer electronics product, the consumer is also increasingly high to the mobile electronic terminal requirement of products, also is increasingly high to the requirement of the quality of product.Yet water brings destructive destruction can for the mobile electronic terminal product, also just scraps if the mobile electronic terminal product falls into water to take out basically again.Though adopt in the prior art to detect drowningly through transducer, all have two problems: 1) cost is high, in epoch of this consumer electronics product meagre profit nowadays, cost is an individual very important factor; 2) these transducers are to be installed in above the mainboard, fall into water if sensor arrives, and other parts of product have also touched with water basically, do not have an effect with foresight.

The utility model content

To exist in the prior art to pass through the sensor cost that falls into water higher and still can not well protect the problem of this product; The purpose of the utility model provides a kind of drowning automatic detection device that is used for the mobile electronic terminal product; Can when detecting the situation of falling into water, cut off powered battery in time.

For achieving the above object, the utility model adopts following technical scheme:

A kind of drowning automatic detection device that is used for the mobile electronic terminal product; Be located in the shell of mobile electronic terminal product; Comprise battery, power module and central processing module in the shell; Also comprise fall into water trigger module and switch module in the said shell, said central processing module links to each other with drowning trigger module and switch module respectively; One end of said drowning trigger module passes shell and communicates with the external world; The input of said switch module links to each other with battery, and the output of said switch module links to each other with power module.

Said drowning trigger module comprises first electroconductive elastic sheet and second electroconductive elastic sheet side by side, and said first electroconductive elastic sheet links to each other with said power module, and said second electroconductive elastic sheet is through first grounding through resistance; Said second electroconductive elastic sheet also links to each other with said central processing module through cable.

Preferably, be spaced apart 1mm between said first electroconductive elastic sheet and second electroconductive elastic sheet.

Preferably, the preferred 100k Ω of the resistance of said first resistance.

Said switch module comprises NPN type triode; The metal-oxide-semiconductor of P raceway groove, second resistance and the 3rd resistance; The source electrode of the metal-oxide-semiconductor of said P raceway groove links to each other with the positive pole of said battery, and the drain electrode of the metal-oxide-semiconductor of P raceway groove links to each other with the positive pole of said power module, and the grid of the metal-oxide-semiconductor of P raceway groove links to each other with the collector electrode of said NPN type triode through second resistance; The grounded emitter of said NPN type triode, the base stage of said NPN type triode links to each other with said central processing module; One end of said the 3rd resistance links to each other with the positive pole of said battery, and the other end of said the 3rd resistance links to each other with the grid of the metal-oxide-semiconductor of said P raceway groove.

Compared with prior art; Adopt a kind of drowning automatic detection device that is used for the mobile electronic terminal product of the utility model; Be located in the shell of mobile electronic terminal product; Comprise battery, power module and central processing module in the shell, also comprise fall into water trigger module and switch module in the said shell, said central processing module links to each other with drowning trigger module and switch module respectively; One end of said drowning trigger module passes shell and communicates with the external world; The input of said switch module links to each other with battery, and the output of said switch module links to each other with power module.When the mobile electronic terminal product runs into the situation of falling into water; Connect the testing circuit of the trigger module that falls into water through the conduction of water after; Produce an interrupt signal and send to central processing module; Central processing module just can the control switch module break off the path between battery and the power module, when water does not also enter into mobile electronic terminal product inside, cuts off the power supply of mobile electronic terminal product timely.Like this, can reduce product greatly is immersed in water and causes the product short circuit and impaired probability, the loss of in time saving the consumer.

The drowning automatic detection device of the utility model is fit to all kinds of mobile electronic terminal products, is particularly useful for mobile phone, MP4 and some other handheld device etc.

Description of drawings

Fig. 1 is a kind of principle schematic that is used for the drowning automatic detection device of mobile electronic terminal product of the utility model;

Fig. 2 is the circuit diagram of drowning trigger module among Fig. 1;

Fig. 3 is the circuit diagram of switch module among Fig. 1.

Embodiment

Further specify the technical scheme of the utility model below in conjunction with accompanying drawing and embodiment.

Seeing also a kind of drowning automatic detection device 10 that is used for the mobile electronic terminal product shown in Figure 1 is located in the shell (not shown) of mobile electronic terminal product; Comprise battery 11, power module 12, central processing module 13, drowning trigger module 14 and switch module 15 in the shell; Central processing module 13 links to each other with drowning trigger module 14 and switch module 15 respectively; One end of drowning trigger module 14 passes shell and communicates with the external world; The input of switch module 15 links to each other with battery 11, and the output of switch module 15 links to each other with power module 12.Wherein power module 12 is responsible for giving this mobile electronic terminal product power supply, and central processing module 13 is responsible for the work of these mobile electronic terminal products of control, comprises receiving the processing that information that drowning trigger module 14 gives is made conducting and closed switch module 15 then.The trigger module 14 that falls into water is exactly after falling into water, can give 13 1 interrupt signals of central processing module, and notice central processing module product 13 this moment falls into the water, and needs deenergization.

See also drowning trigger module 13 shown in Figure 2 again and comprise side by side first electroconductive elastic sheet 131 and second electroconductive elastic sheet 132; Be spaced apart 1mm between first electroconductive elastic sheet 131 and second electroconductive elastic sheet 132; First electroconductive elastic sheet 131 links to each other with the 3.3V direct voltage that power module provides, and the size of voltage can also be chosen according to actual application environment certainly.Second electroconductive elastic sheet 132 is 100k Ω first resistance R 10 ground connection through resistance, and second electroconductive elastic sheet 132 links to each other with central processing module 13 through cable 133.

Under the normal condition, because air is non-conductive, so do not have electron transfer between these two electroconductive elastic sheets; Just do not have the formation of electric current, this moment, the voltage of second electroconductive elastic sheet 132 was 0V, so when product does not touch water; The voltage that central processing module 13 obtains is low level; Central processing module 13 is to close electronic switch to the control of switch module 15 at this moment, lets battery 11 give power module 12 power supplies, operate as normal.After the mobile electronic terminal product falls into water,, suppose that the water resistance between two electroconductive elastic sheets this moment is R1, so at this moment the voltage V of electroconductive elastic sheet 132 because glassware for drinking water has conductivity (except the distilled water) _CFor:

At this; To set forth the problem of the size of water resistance earlier and since in water resistance and the water salt content how much, the charge number of water intermediate ion concentration, ion and the movement velocity of ion are relevant; So this value of water resistance R1 is a uncertain value; But through actual sampling Detection, can be below in the life less than 100k Ω through the resistance of the water outlet of the water that regular meeting runs into, so in the utility model, selected for use the resistance of first resistance R 10 to be exactly and this has relation for 100k Ω.Certainly, the size of the resistance value of first resistance is unfixing, can also come type selecting according to actual conditions.

Suppose that product falls in the water of resistance R 1=1k Ω of a water, the formula above utilizing so can get Vc ≈ 3.3V; Suppose that product falls in the water of resistance R 1=100k Ω of a water, utilize above formula can get Vc=1.65V so, and for central processing module 13 as long as more than Vc＞0.8V, the signal that can be judged as this moment is a high level signal.According to above analysis, can find that fall into the water with not in water the time at the mobile electronic terminal product, the voltage signal that second electroconductive elastic sheet 132 among Fig. 2 is produced is different, summarizes as follows:

A does not fall into Vc=0V in the water＜0.8V system and is judged to be low level;

B falls into Vc=1.65～3.3V in the water＞0.8V system and is judged to be high level.

Whether just can judge the mobile electronic terminal product from above summary falls into the water.

Need to prove that two electroconductive elastic sheets in the trigger module 13 that falls into water can communicate with the external world through front, the back side or the side of shell, in order not influence the attractive in appearance of product, these two blocks of electroconductive elastic sheets meeting pitamen material block and do not influence the quick infiltration of water certainly.

See also switch module shown in Figure 3 15 again and comprise NPN type triode Q102; The metal-oxide-semiconductor Q101 of P raceway groove, second resistance R 102 and the 3rd resistance R 101; The source electrode of the metal-oxide-semiconductor Q101 of P raceway groove links to each other with the positive pole of battery; The drain electrode of the metal-oxide-semiconductor Q101 of P raceway groove links to each other with the positive pole of power module 12, and the grid of the metal-oxide-semiconductor Q101 of P raceway groove links to each other the grounded emitter of NPN type triode Q102 through second resistance R 102 with the collector electrode of NPN type triode Q102; The base stage of NPN type triode Q102 links to each other with central processing module 13, receives the control signal of central processing module 13.One end of the 3rd resistance R 101 links to each other with the positive pole of battery 11, and the other end of the 3rd resistance R 101 links to each other with the grid of the metal-oxide-semiconductor Q101 of P raceway groove.

If central processing module 13 is given high level of NPN type triode Q102; Can know by the operation principle of triode so; The metal-oxide-semiconductor Q101 of P raceway groove moves ground connection to through second resistance R 102, and the source electrode of the metal-oxide-semiconductor Q101 of P raceway groove and drain electrode so just can operate as normal with regard to conducting like this.If central processing module 13 is given low level of NPN type triode Q102; The metal-oxide-semiconductor Q101 of P raceway groove is just moved to the cell voltage VBAT of battery 11 on the 3rd resistance R 101; The source electrode of the metal-oxide-semiconductor Q101 of P raceway groove is just closed with drain electrode like this; Power supply is just broken off by the metal-oxide-semiconductor Q101 of raceway groove, plays the effect of a protection mobile electronic terminal product.

Those of ordinary skill in the art will be appreciated that; Above embodiment only is the purpose that is used for explaining the utility model; And be not with the qualification of doing the utility model; As long as in the essential scope of the utility model, in the scope to the variation of the above embodiment, claim that modification all will drop on the utility model.

Claims (5)

1. a drowning automatic detection device that is used for the mobile electronic terminal product is located in the shell of mobile electronic terminal product, comprises battery, power module and central processing module in the shell, it is characterized in that:

Also comprise fall into water trigger module and switch module in the said shell, said central processing module links to each other with drowning trigger module and switch module respectively; One end of said drowning trigger module passes shell and communicates with the external world; The input of said switch module links to each other with battery, and the output of said switch module links to each other with power module.

2. drowning automatic detection device according to claim 1 is characterized in that:

Said drowning trigger module comprises first electroconductive elastic sheet and second electroconductive elastic sheet side by side, and said first electroconductive elastic sheet links to each other with said power module, and said second electroconductive elastic sheet is through first grounding through resistance; Said second electroconductive elastic sheet also links to each other with said central processing module through cable.

3. drowning automatic detection device according to claim 2 is characterized in that:

Be spaced apart 1mm between said first electroconductive elastic sheet and second electroconductive elastic sheet.

4. drowning automatic detection device according to claim 2 is characterized in that:

The resistance of said first resistance is 100k Ω.

5. drowning automatic detection device according to claim 1 is characterized in that:

Said switch module comprises NPN type triode; The metal-oxide-semiconductor of P raceway groove, second resistance and the 3rd resistance; The source electrode of the metal-oxide-semiconductor of said P raceway groove links to each other with the positive pole of said battery, and the drain electrode of the metal-oxide-semiconductor of P raceway groove links to each other with the positive pole of said power module, and the grid of the metal-oxide-semiconductor of P raceway groove links to each other with the collector electrode of said NPN type triode through second resistance; The grounded emitter of said NPN type triode, the base stage of said NPN type triode links to each other with said central processing module; One end of said the 3rd resistance links to each other with the positive pole of said battery, and the other end of said the 3rd resistance links to each other with the grid of the metal-oxide-semiconductor of said P raceway groove.

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