CN201160104Y

CN201160104Y - Emergency charger for mobile telephone of dry cell USB socket

Info

Publication number: CN201160104Y
Application number: CNU200720174270XU
Authority: CN
Inventors: 张卿
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-12-17
Filing date: 2007-12-17
Publication date: 2008-12-03
Anticipated expiration: 2017-12-17

Abstract

The utility model relates to an emergency charger for a dry battery type mobile phone with a USB jack, which comprises a casing body, a dry battery, a circuit board and a charging jack, wherein the dry battery and the circuit board are arranged in the casing body, the input terminal of the circuit board is connected with the positive and negative electrodes of the dry battery, the input terminal of the circuit board is connected with the positive and negative electrodes of the charging jack, the circuit board is provided with a boosting chip, and the charging jack is a standard USB jack. The emergency charger has the advantages that the charging current is stable, the charging effect is good, and the emergency charger can fully meet the charging requirements of the mobile phone battery; the USB jack is used, which accords with the requirements of uniformity of the future mobile phone interface; the structure is simple, the cost is low, and the emergency charger is suitable for emergency charging for various mobile phones.

Description

Dry battery type USB socket emergent charger for cell phone

One, technical field

The present invention relates to a kind of emergent charger for cell phone, especially a kind of dry battery type band USB socket emergent charger for cell phone

Two, background technology

Present charger for mobile phone mostly is the alternating current charging device, be that AC power is passed through transformer, rectifier to cell-phone charging, this charger must be in the place with AC power, when going out work, tourism, people just can not use by the demand charging at any time, for this reason, emergency service device for out using is also arranged, as Chinese patent 200420053265.X disclosed " dry battery type charger for mobile phone ", this charger is to use four joint series connection to make output voltage reach the 4-4.5 volt by switching circuit, realizes the mobile phone emergent charging from face.But there is following shortcoming in it: 1, adopt four joint dry cells, make the charger volume bigger; 2, components and parts are more in the circuit, and the result is too complicated, and cost of manufacture is higher; 3, charging socket disunity, it is poor to exchange usability, restricted application.

Three, summary of the invention

The objective of the invention is that existing charger for emergency volume is big, charging is unstable, the interface disunity in order to overcome, current loss is excessive, and temperature is too high, and defective such as can not cut off the power supply during the charging short circuit provides a kind of dry battery type USB interface emergent charger for cell phone.

For achieving the above object, the technical solution used in the present invention is:

Described emergent charger for mobile phone comprises housing, dry cell, circuit board and charging socket, and dry cell and circuit board place in the housing, and the circuit board input is just connecting described dry cell, negative electrode, output and charging socket just, negative electrode links to each other,

Described circuit board is provided with the chip that boosts, and described charging socket is a standard USB socket.

In order further to improve boost charge function of the present invention, described circuit board is except that the chip that boosts, also comprise resistance R, light-emitting diode D1, inductance L, special based diode D2 and capacitor C disappear, resistance R is connected with light-emitting diode with after inductance L is in parallel again, one end links to each other with the positive electrode of battery, the other end links to each other with the input LX of the chip that boosts, the earth terminal VSS of chip of boosting connects the negative electrode of battery and the negative electricity plate of charging socket, output VDD connects the positive electrode of charging socket, boosting is provided with the described special based diode that disappears between the input LX of chip and the output VDD, between the output VDD of the chip that boosts and the earth terminal VSS described electric capacity is set.

For making this charger also have the function of illumination simultaneously, also be provided with illuminating lamp and switch thereof in this charger housing, illuminating lamp links to each other with battery plus-negative plate with switch series connection back, is installed on the housing relevant position.

The invention has the beneficial effects as follows: because adopt 2 joint dry cells to connect mutually, its charging interval obviously extends, control by the rectification and the filtering of the chip that boosts simultaneously, guarantee that output voltage is 4.5 volts and passes through the MOSFET overcurrent protection, electric current and voltage is kept relative stability, the better protection mobile phone meets the charging requirement of battery of mobile phone fully; Use the USB socket, meet the uniformity requirement of following handset port; Adopt the charge condition of light-emitting diode energy prompting mobile telephone set user battery, extensive use of the present invention for this reason can produce favorable economic benefit.

Four, description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is circuit theory diagrams of the present invention;

Among the figure: 1-housing, 2-dry cell, 3-circuit board, 4-charging socket, 5-chip, 6-illuminating lamp, 7-switch, LX-chip input, VDD-chip output, the VSS-chip earth terminal that boosts that boosts that boosts that boosts.

Five, embodiment:

Dry battery type USB interface emergent charger for cell phone of the present invention, comprise housing 1, dry cell 2, circuit board 3 and charging socket 4, two joint dry cells 2 and circuit board 3 place in the housing 1, circuit board 3 inputs are just connecting described dry cell 2, negative electrode, output and charging socket 4 are just, negative electrode links to each other, described circuit board 3 comprises the chip 5 that boosts, resistance R, light-emitting diode D1, inductance L, special based diode D2 and capacitor C disappear, resistance R is connected with light-emitting diode with after inductance L is in parallel again, one end links to each other with the positive electrode of battery, the other end links to each other with the input LX of the chip that boosts, the earth terminal VSS of chip of boosting connects the negative electrode of battery and the negative electricity plate of charging socket, output VDD connects the positive electrode of charging socket, boost and be connected the special based diode that disappears between input LX and the output VDD of chip, boost and be connected capacitor C between output VDD and the earth terminal VSS of chip, its effect is that the temperature that short circuit causes when preventing the chip cisco unity malfunction raises, and final realization is 5.5 volts of charging voltages with 3 volts dry cell boost in voltage.Wherein resistance R can be selected 80 Ω for use, and electric capacity is 160 μ F20V, and inductance L is selected 50 μ h for use, adopts the CE8301 chip that boosts.The USB socket of charging socket 4 selection standards, thereby the standardization of realization mobile phone charging interface.

Simultaneously, also can possess illumination functions for making the present invention, also be provided with illuminating lamp 6 and switch 7 in this charger housing, illuminating lamp 6 and switch 7 series connection backs link to each other with battery plus-negative plate and are installed on the housing accordingly in the installing hole.

In addition, when the USB socket is connected with housing, can directly be connected on the housing, also can be connected with circuit board by lead and be placed on outside the housing, this moment, USB charging socket and cell-phone charging plug joined more convenient.

Charging just begins to carry out after the USB mouth of the output socket of the interface of USB and cell-phone charging joins, and battery of mobile phone forms the charging path, and light-emitting diode conducting this moment begin luminously, indicates mobile phone to be in charged state.Disappear special based diode except guaranteeing the needed voltage of chip operate as normal, can also play the effect that prevents reverse charging.The model of special based diode of disappearing is IN5819, and its effect is that circuital current is carried out current-limiting protection, and when the dry cell electric quantity consumption finishes or charging mobile phone battery finishes, light-emitting diode is not luminous, the prompting user end of charging.

Claims

1, a kind of dry battery type USB socket emergent charger for cell phone, comprise housing (1), dry cell (2), circuit board (3) and charging socket (4), dry cell (2) and circuit board (3) place in the housing (1), and circuit board (3) input is just connecting described dry cell (2), negative electrode, output and charging socket (4) are just, negative electrode links to each other, and it is characterized in that: described circuit board (3) is provided with the chip that boosts (5), and described charging socket (4) is a standard USB socket.

2, dry battery type USB socket emergent charger for cell phone according to claim 1, it is characterized in that: described circuit board (3) is except that the chip that boosts (5), also comprise resistance R, light-emitting diode D1, inductance L, special based diode D2 and capacitor C disappear, resistance R is connected with light-emitting diode with after inductance L is in parallel again, one end links to each other with the positive electrode of battery, the other end links to each other with the input (LX) of the chip that boosts, the earth terminal (VSS) of chip of boosting connects the negative electrode of battery and the negative electricity plate of charging socket, output (VDD) connects the positive electrode of charging socket, boosting is connected the special based diode D2 that disappears between input (LX) and the output (VDD) of chip, is connected capacitor C between the output of the chip that boosts (VDD) and the earth terminal (VSS).

3, dry battery type USB socket emergent charger for cell phone according to claim 2 is characterized in that: also be provided with illuminating lamp (6) and switch (7) in this charger housing, illuminating lamp (6) links to each other with battery plus-negative plate with switch (7) series connection back.

4, dry battery type USB socket emergent charger for cell phone according to claim 2 is characterized in that: described standard USB socket directly is connected on the housing or is connected with circuit board by lead and is placed on outside the housing.