JP3060267U - Cell phone battery charger - Google Patents

Abstract

(57) [Summary] A battery charger for a mobile phone, which is convenient for carrying and using and has wide applicability. SOLUTION: This is a charger for a nickel-metal hydride or lithium ion battery used in a mobile phone, has a high charging efficiency, a high charging speed, is applicable to a wide range of voltages, and has characteristics convenient for carrying. ing. The battery charger of the present invention is composed of a case, a rotatable housing type charging plug and an internal electric circuit device. The feature is in the internal electric circuit device, the electric circuit device is overload, overvoltage protection circuit, electromagnetic interference filter circuit, voltage stabilization circuit, vibration circuit, DC rectification circuit, DC input protection circuit, AC filter circuit, It consists of a detection circuit and an automatic shutdown system.
It can be set to 0 V, and is applied to an environment of 110 to 240 V of a commercial power supply, and has the convenience of being able to be charged even by a power supply of a vehicle.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a kind of mobile phone battery charger, particularly a small and portable battery charger, which has an automatic transformer function by its circuit design and can be applied to a relatively wide voltage range. It can be used completely without being affected by the voltage environment, can be charged using the power supply of a car or commercial power, and its practicality and inventive step have been greatly improved.It is also provided for nickel-metal hydride batteries and lithium-ion batteries. The present invention therefore relates to a battery charger for a mobile phone, which has the advantage of not having a discharging or malignant memory effect.

[0002]

[Prior art]

 With the advanced development of communication networks and changes in social forms, products that use advanced science and technology have become widespread in daily life. Mobile phones in particular have become indispensable tools for businessmen. Existing mobile phones are combined with a secondary battery that is charged by a charger, but this charger has a considerably large volume and has the following disadvantages under multiple restrictions. Was. 1. Conventional chargers have a narrow voltage application range and therefore do not have the characteristics that can be widely applied.In foreign countries using different voltages, their charging functions cannot be operated, and therefore, when they are carried overseas. Could not make international calls. 2. Conventional chargers are connected to an outlet with a cord for charging, so the cord was entangled and the cord connection was troublesome. 3. Conventional chargers can charge only nickel cadmium batteries, do not have a function to identify the type of battery, and have been considerably less practical. 4. Conventional chargers do not have a protection circuit, and do not have a function of automatically shutting down when a battery becomes saturated in charge. 5. Since conventional chargers do not have a protection circuit, when charging is saturated, the temperature rises and the power consumption increases, and internal components may be damaged, which has a significant effect on the service life. 6. Since conventional chargers do not have a filter circuit, current and voltage interference could not be effectively prevented.

[0003]

[Problems to be solved by the invention]

 It is an object of the present invention to provide a kind of battery charger for a mobile phone, in which the cord of the conventional charger is eliminated, and a rotating and retractable charging plug is inserted directly into an outlet for charging. It is easy to carry out, is compact and portable, can be applied over a wide voltage range, and can be charged with a vehicle power supply, and can overcome the drawbacks of conventional chargers.

[0004]

[Means for Solving the Problems]

 The invention according to claim 1 comprises a case 1, a rotating built-in charging plug 2 housed on the back of the case 1 and capable of being rotated 90 degrees outward and positioned to be directly inserted into an outlet, and an internal electric circuit. A battery charger for a mobile phone, which is composed of the device 3 and can be charged by inserting the battery 4 of the mobile phone, wherein the internal electric circuit device 3 comprises an overload / overvoltage protection circuit A, an electromagnetic interference filter circuit, B, a voltage stabilizing circuit C, a vibration circuit D, a DC rectifying circuit E, a DC input terminal protection circuit F, an AC filter circuit G, a detection circuit H, and an automatic shutdown system I. Is input from the charging plug 2 with built-in rotation, and the inputtable voltage range is 110 V to 240 V to perform overload protection and overvoltage protection, and is connected to the overload and overvoltage protection circuit A. The electromagnetic wave interference filter processing is performed in the electromagnetic wave interference filter circuit B, a voltage stabilizing circuit C is connected to the electromagnetic wave interference filter circuit B, and an ON or OFF signal of the transistor Q1 of the voltage stabilizing circuit C is transmitted to the oscillation circuit D. After the waveform is determined, the DC rectifier circuit E steps down at T1 and then rectifies to DC at D2. The DC input terminal protection circuit F has a DC input terminal J1 for charging using a vehicle power supply. , D3 to provide reverse voltage protection, the AC filter circuit G has an AC filter capacitor C6, the detection circuit H detects whether the battery is saturated, and when the detection circuit H detects a saturated state, the automatic shutdown system is activated. SCR2 of I operates, the charging power supply is cut off to stop charging, the green LED 1 is turned on, and the detecting circuit H continuously detects the battery voltage and current amount, and the detected value is smaller than a predetermined value. If the detection circuit H does not detect the saturation state, the charging is continued and the red LED 2 is turned on. It is a cell phone battery charger that is configured to light up.

[0005]

[Embodiment of the invention]

 The mobile phone battery charger provided by the present invention is a charger for nickel-metal hydride and lithium-ion batteries used in mobile phones.It has high charging efficiency, high charging speed, and is applicable to a wide range of voltages. It has characteristics that are convenient to carry. The charger of the present invention is composed of a case, a rotatable charging plug and an internal electric circuit device. The feature is in the internal electric circuit device, which is composed of overload, overvoltage protection circuit, electromagnetic interference filter circuit, voltage stabilization circuit, vibration circuit, DC rectifier circuit, DC input protection circuit, AC filter It consists of a circuit, a detection circuit, and an automatic shutdown system. The automatic voltage transformation by this circuit device enables the input voltage range to be 90 to 250 V, and is applicable to the environment of commercial power supply of 110 to 240 V, and it can also be used for vehicle power supply. It is said that it has the convenience of charging.

[0006]

【Example】

 As shown in FIG. 1, the battery charger for a mobile phone of the present invention has a small and compact design that is convenient for carrying, and is applicable to various types of battery products for mobile phones that are commercially available. . The present invention is composed of a case 1, a built-in rotation type charging plug 2 and an internal electric circuit device 3. A fitting groove 11 corresponding to the design of the battery 4 is formed on the front surface of the case 1. To form As shown in FIG. 2, the rotation built-in type charging plug 2 is provided on the back surface of the case 1, and the built-in rotation type charging plug 2 is electrically connected to the internal electric circuit device 3. Form the power input end of the circuit. In addition, the charging plug 2 with built-in rotation can be rotated 90 degrees and positioned, and can be directly inserted into the outlet. At this time, the battery 4 is inserted into the charger, and there is no need for a troublesome procedure of combining a cord and an adapter for connection to a power source as in a conventional charger. In addition, the charging plug 2 with built-in rotation is rotated at the time of non-charging to be accommodated in the recess 21 on the rear surface of the case to form a flat surface coinciding with the rear surface of the case, thereby achieving the purpose of saving space. I have.

As shown in FIGS. 3 and 4, the circuit device of the present invention includes an overload / overvoltage protection circuit A, an electromagnetic interference filter circuit B, a voltage stabilization circuit C, a vibration circuit D, a DC rectifier circuit E, and a DC input. The circuit includes an end protection circuit F, an AC filter circuit G, a detection circuit H, and an automatic shutdown system I.

The overload / overvoltage protection circuit A receives an alternating current from the built-in rotation type charging plug 2, and its voltage range is 10 V to 240 V, performs overload protection at F 1, and performs overvoltage protection at AVR 1 and F 1. I do.

Subsequently, the electromagnetic wave interference filter circuit B processes the electromagnetic wave interference filtering by C1, L1, and L2.

The voltage stabilizing circuit C is composed of transistors Q 1 and R 1, R 3, R 4, and the ON or OFF signal of the transistor R 1 is determined by the waveform of the oscillation circuit D.

The oscillating circuit D is composed of Z1, D1, C4 and R2, and controls an ON or OFF signal of the transistor Q1.

[0012] The DC rectifier circuit E rectifies to DC at D2 after stepping down at T1.

[0013] The DC input terminal protection circuit F is a DC input terminal when J1 is charged by using the power supply of the vehicle, and performs reverse voltage protection at D3.

In the AC filter circuit G, C6 is an AC filter capacitor.

The detection circuit H detects whether the battery is saturated.

In the automatic shutdown system I, when the detection circuit G detects a saturated state, the SCR 2 operates to cut off the charging power supply to stop charging, thereby providing a battery protection function.

In FIG. 4, J is a saturation instruction circuit, and turns on the green LED 1 when the battery is in a saturated state. However, if the detection circuit H continuously detects the battery voltage and the current amount and the detected value is smaller than a predetermined value, the charging to the battery proceeds continuously, otherwise, the power is cut off and the circulation detection is performed. , Until the battery is removed from the charger.

K is a general rechargeable battery set, which is a load of an electric circuit.

Reference numeral L denotes a charging circuit and a charging instruction lamp, and when the detecting circuit H detects an unsaturated state, the charging state is continued, and at this time, the red LED 2 is turned on.

With the above-described electric circuit device, the present invention has the advantages that the charging speed is high and the charging efficiency is high, and the voltage can be applied in the range of 90 to 250 V, and the voltage environment can be improved. It is unrestricted, can be used in various countries, and has high practicality. And it is very convenient to use because it is not necessary to combine the cord and the adapter each time.

[0021]

[Effect of the invention]

 The present invention has the following advantages. 1. The maximum output current of the charger is 250 mA, the charging speed is high, and the efficiency is high. It is applicable to a voltage range of 90 to 250 V, and has practical functions that are not restricted by the voltage environment and can be used in various countries. 2. Nickel-metal hydride batteries or lithium-ion batteries can be charged, overcoming the drawback of charging only a single type of battery in conventional chargers. The battery can be charged by automatically discriminating between a battery and a lithium-ion battery. 3. It has an overcharge protection circuit, which automatically turns off when charging is saturated and stops charging the battery, thus providing battery protection. 4. It has an output protection circuit, so there is no danger of earth leakage at the output end. 5. It has an electromagnetic wave interference filter circuit and has characteristics of preventing interference with home appliances current and voltage. 6. The power consumption of the present invention is about 40 mW, therefore, the power consumption is small and has an effect of eliminating a temperature rise during charging, and can extend the life of the charger. 7. The present invention is practical and convenient because it can be applied to both charging of commercial power and charging using the power of a car.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a battery installation in a preferred embodiment of the present invention.

FIG. 2 is a side view and a rear view of the present invention.

FIG. 3 is an internal circuit flowchart of the present invention.

FIG. 4 is a circuit diagram of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 11 Fitting groove 12 Conductive piece 2 Rotating built-in charging plug 21 Recess 3 Internal electric circuit device 4 Battery 41 Locking projection A Overload / overvoltage protection circuit B Electromagnetic wave interference filter circuit C Voltage stabilization circuit D Vibration circuit E DC Rectifier circuit F Input protection circuit G AC filter circuit H Detection circuit I Automatic shutdown system J Battery saturation indication green lamp J1 DC input terminal K Rechargeable battery set L Charging circuit and charging indication red lamp

Claims (1)

[Utility model registration claims] 1. A case 1; a built-in charging plug 2 housed on the back of the case 1 and capable of being rotated 90 degrees outward and positioned to be directly inserted into an outlet; and an internal electric circuit device 3. Wherein the internal electric circuit device 3 comprises an overload / overvoltage protection circuit A, an electromagnetic interference filter circuit B, A stable circuit C, a vibration circuit D, a DC rectifier circuit E, a DC input terminal protection circuit F, an AC filter circuit G, a detection circuit H, and an automatic shutdown system I are provided. The voltage is input from the built-in charging plug 2, the inputtable voltage range is set to 110 V to 240 V to perform overload protection and overvoltage protection, and electromagnetic waves connected to the overload and overvoltage protection circuit A are provided. Is traveling electromagnetic interference filtering by Wataru filter circuit B, the electromagnetic interference filter circuit B voltage stabilization circuit C is connected to the transistor Q of the voltage stabilizing circuit C
The ON or OFF signal of 1 is determined by the waveform of the oscillation circuit D, the DC rectifier circuit E rectifies to DC at D2 after stepping down at T1, and the DC input terminal protection circuit F uses the power supply of the car. It has a DC input terminal J1 for charging, performs reverse voltage protection at D3, the AC filter circuit G has an AC filter capacitor C6, and the detection circuit H detects whether or not the battery is saturated and detects it. When the circuit H detects the saturation state, the SCR2 of the automatic shutdown system I operates to turn off the charging power supply to stop charging, turn on the green LED 1, and the detection circuit H continuously detects the battery voltage and the current amount. If the detected value is smaller than a predetermined value, the charging of the battery is continuously performed, otherwise, the power is cut off, and the cycle is repeated.
If the detection circuit H does not detect a saturation state, charging is continued and the red LED 2 is turned on, and a battery charger for a mobile phone.