CN203233137U - Waterproof device for communication apparatus - Google Patents
Waterproof device for communication apparatus Download PDFInfo
- Publication number
- CN203233137U CN203233137U CN 201320195540 CN201320195540U CN203233137U CN 203233137 U CN203233137 U CN 203233137U CN 201320195540 CN201320195540 CN 201320195540 CN 201320195540 U CN201320195540 U CN 201320195540U CN 203233137 U CN203233137 U CN 203233137U
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- China
- Prior art keywords
- water
- effect transistor
- field effect
- current
- protection switch
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a waterproof device for a communication apparatus. The waterproof device for the communication apparatus comprises a cell, an over-current overload protection switch, a water trigger circuit and a load circuit. The waterproof device for the communication apparatus with fewer elements is simple in circuit structure, low in cost and easy to implement, use and popularize. Even if no waterproof and sealing processes are performed for an electronic product, the performance and function of the electronic product will not be influenced.
Description
Technical field
The utility model relates to a kind of water-tight device, relates in particular to a kind of water-tight device for communication apparatus.
Background technology
We know that electronic product will cause electronic circuit to damage contact water under charged situation after, even scrap, fall in the water easily when particularly communication apparatus uses out of doors, at present, in order to address this is that common employing sealing, still common electronic equipment all can't seal fully, as charging inlet and earphone interface etc., as forget jack blocked up that the water-proof function of this electronic product just performs practically no function.
Summary of the invention
The purpose of this utility model provides a kind of water-tight device for communication apparatus with regard to being in order to address the above problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The utility model comprises battery, over-current and-load protection switch, water circuits for triggering and load circuit; the power output end of described battery is connected with the power input of described over-current and-load protection switch; the power output end of described over-current and-load protection switch is connected with the power input of described load circuit, and the triggering control signal input of described over-current and-load protection switch is connected with the triggering control signal output of described water circuits for triggering.
Particularly, described water circuits for triggering comprise field effect transistor, resistance, diode and triode, the emitter of described triode is connected with the drain electrode of described field effect transistor and the positive pole of described diode simultaneously, the collector electrode of described triode is connected with first end of described resistance and the grid of described field effect transistor simultaneously, second end of described resistance is connected with the source electrode of described field effect transistor and the negative pole of described diode simultaneously, the negative pole of described diode is the anode connection terminal of described over-current and-load protection switch, the base stage of described triode is the water trigger end, the negative pole link of the just very described over-current and-load protection switch of described diode; Described triode is NPN type triode, and described field effect transistor is P channel-type field effect transistor.
The beneficial effects of the utility model are:
The utility model is simple in structure, and cost is low, is convenient to implement, and does not need former already used electronic circuit is changed, and is easy to use, can not need that electronic product is carried out waterproof sealing and handle, and do not influence performance and the function of primary electron product.
Description of drawings
Fig. 1 is circuit structure theory diagram of the present utility model.
Fig. 2 is the structure principle chart of water circuits for triggering of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1: the utility model comprises battery, over-current and-load protection switch, water circuits for triggering and load circuit; the power output end of described battery is connected with the power input of described over-current and-load protection switch; the power output end of described over-current and-load protection switch is connected with the power input of described load circuit, and the triggering control signal input of described over-current and-load protection switch is connected with the triggering control signal output of described water circuits for triggering.
As shown in Figure 2: described water circuits for triggering comprise field effect transistor T, resistance R, diode VD and triode Q, the emitter of triode Q is connected with the drain electrode of field effect transistor T and the positive pole of diode VD simultaneously, the collector electrode of triode Q is connected with first end of resistance R and the grid of field effect transistor T simultaneously, second end of resistance R is connected with the source electrode of field effect transistor T and the negative pole of diode VD simultaneously, the negative pole of diode VD is the anode connection terminal of over-current and-load protection switch, the base stage of triode Q is the water trigger end, the negative pole link of the just very over-current and-load protection switch of diode VD; Triode Q is NPN type triode, and field effect transistor T is P channel-type field effect transistor.
As shown in Figure 2: under initial condition, the grid of field effect transistor T is connected with the positive pole of battery or the electrode input end of load circuit by resistance R, therefore, the grid of field effect transistor T is in high level, source electrode and the drain electrode of field effect transistor T are in cut-off state, at this moment battery is given the load circuit normal power supply, work as battery, after load and anti-water circuit are drenched by water or are immersed in water, because the electric action of water is raised the water trigger end current potential of water circuits for triggering, thereby make collector electrode and the emitter conducting of triode Q, make the source electrode and drain electrode conducting of field effect transistor T, both positive and negative polarity short circuit with power supply, cause the over-current and-load defencive function of battery or load circuit inside to start, thereby cut off the power supply that battery is given load circuit, this moment, electronic circuit water-proof device returned to initial condition because of dead electricity, like this under the situation that does not have electricity, electronic circuit on the electronic product will significantly reduce or not have electrochemical reaction, therefore can play the protective effect to the electronic product that is immersed in water; After the electronic circuit of electronic product and battery are thoroughly dried, can the power supply of bio-occlusion electronic product after will the instantaneous charging of battery activating.
Claims (3)
1. water-tight device that is used for communication apparatus; it is characterized in that: comprise battery, over-current and-load protection switch, water circuits for triggering and load circuit; the power output end of described battery is connected with the power input of described over-current and-load protection switch; the power output end of described over-current and-load protection switch is connected with the power input of described load circuit, and the triggering control signal input of described over-current and-load protection switch is connected with the triggering control signal output of described water circuits for triggering.
2. the water-tight device for communication apparatus according to claim 1; it is characterized in that: described water circuits for triggering comprise field effect transistor; resistance; diode and triode; the emitter of described triode is connected with the drain electrode of described field effect transistor and the positive pole of described diode simultaneously; the collector electrode of described triode is connected with first end of described resistance and the grid of described field effect transistor simultaneously; second end of described resistance is connected with the source electrode of described field effect transistor and the negative pole of described diode simultaneously; the negative pole of described diode is the anode connection terminal of described over-current and-load protection switch; the base stage of described triode is the water trigger end, the negative pole link of the just very described over-current and-load protection switch of described diode.
3. the water-tight device for communication apparatus according to claim 2, it is characterized in that: described triode is NPN type triode, described field effect transistor is P channel-type field effect transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320195540 CN203233137U (en) | 2013-04-18 | 2013-04-18 | Waterproof device for communication apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320195540 CN203233137U (en) | 2013-04-18 | 2013-04-18 | Waterproof device for communication apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203233137U true CN203233137U (en) | 2013-10-09 |
Family
ID=49289241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320195540 Expired - Fee Related CN203233137U (en) | 2013-04-18 | 2013-04-18 | Waterproof device for communication apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203233137U (en) |
-
2013
- 2013-04-18 CN CN 201320195540 patent/CN203233137U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131009 Termination date: 20140418 |