JPH0993823A - Charger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To charge a battery easily, as it is, by providing a charger with a section for inducing a field in a coil, and a portable section containing a battery with the field induced in the coil. SOLUTION: The charger comprises a fixed section 10 for inducing a field in a coil L1 by applying a voltage from an AC power supply AC after rectification and shaping, and a portable section 20 disposed in a portable apparatus including a battery 21 while being separated from the fixed section 10 and charging the battery 21 with the field induced in the coil L1. The coil L1 at the fixed section 10 and the secondary coil L2 at the portable section 20 are set continuously each other by providing the case at the fixed section 10 with the mounting part at the portable section 20 and mounting the portable section 20 at the mounting part, for example. According to the arrangement, the battery 21 can be charged easily without being drawn out from the apparatus and without connecting the charging wiring directly with the battery 21 and the charger can be used stably for a long term.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging device for charging a battery.

[0002]

2. Description of the Related Art In recent years, various electronic devices such as small radios, audio cassette tape recorders, and notebook computers have a rechargeable battery built therein, and a load is driven by a power source precharged in the battery. There are a lot of things I have done. In such an electronic device, when the remaining charge of the battery decreases, the device cannot operate normally. Therefore, when the remaining charge reaches a predetermined value or less, it is necessary to charge the battery.

Therefore, conventionally, when charging a battery, a battery is drawn from an electronic device and a pulsating current power source or a DC power source obtained by rectifying a commercial power source is directly applied to the battery through a connecting wire to charge the battery. Or
Connect the device case to the battery to provide a jack, connect the plug to this jack, and rectify the commercial power source to obtain the pulsating current power source or DC power source directly to the battery via the connecting wire, plug and jack. It is applied and charged.

[0004]

However, as in the former case, it is troublesome for the user to pull out the battery from the device and charge the battery every time the battery is charged.
In addition, like the latter, it is necessary to connect the battery to the battery in the case of the device, connect the plug to this jack to charge the battery, because foreign objects etc. enter the jack during long-term use and charge it. There is a problem that an error is likely to occur.

The object of the present invention was made in view of the above-mentioned problems of the prior art, and it is easy to use the battery without pulling out the battery from the equipment and directly connecting the charging wiring to the battery. The object is to provide a charging device that is appropriately configured so that it can be charged for a long time and can be stably used for a long period of time.

[0006]

In order to achieve the above object, a charging device of the present invention is a portable device having a fixed portion for rectifying and wave-shaping an AC power source and applying it to a coil to generate an induced magnetic field, and a battery. And a portable unit that is provided in the device and charges the battery by the induction magnetic field of the coil.

The fixing unit rectifies the AC power supply to generate a pulsating power supply, a waveform rectification unit that shapes the output of the rectification unit, and an output of the waveform shaping unit to transmit the output. And a transmitter for applying to the coil, wherein the portable unit is
A secondary coil that receives an induced magnetic field generated by the coil,
It has a diode for rectifying the induction power source generated by the secondary coil and applying it to the battery.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention. This charging device receives an AC power supply AC, rectifies and shapes the waveform of the AC power supply AC, and coils L1.
And a mobile unit 20 provided inside the mobile device having the battery 21 and charging the battery 21 by the magnetic field induced by the coil L1 and separated from the fixed unit 10. .

The fixed section 10 is provided with a rectification section 11, a waveform shaping section 12, a power transmission section 13 and a coil L1. The rectifying unit 11 includes diodes D1 to D4 bridge-connected to perform full-wave rectification of the AC power supply AC, and a capacitor C1 connected between the connection points of the AC power supply AC of the bridge circuit. In addition, the waveform shaping circuit 12 includes the rectification unit 1
1 is composed of resistors R1 to R3 connected in series between the positive electrode side terminal and the negative electrode side terminal, and a capacitor C2 connected in parallel to the resistor R2, and the connection point of the resistors R1 and R2 and the capacitor C2 is a coil. Connect to one end of L1.

The power transmission unit 13 has an NPN transistor Q1 whose base is connected to the connection point of the resistors R2 and R3 of the waveform shaping unit 12, and a forward direction between the collector of the transistor Q1 and the other end of the coil L1. Connected diode D5 and collectors C3 and C4 respectively connected between the emitter of transistor Q1 and both ends of coil L1.
And a resistor R4 connected between the emitter of the transistor Q1 and the negative terminal of the rectifying unit 11.

Further, the portable section 20 includes a secondary coil L2 which receives an induction magnetic field generated by the coil L1 of the fixed section 10,
A diode D6 having a cathode connected to one end of the secondary coil L2, and a battery 21 connected between the anode of the diode D6 and the other end of the secondary coil L2.

Here, the coil L1 of the fixed portion 10 and the secondary coil L2 of the portable portion 20 are arranged so as to be adjacent to each other.
For example, the mobile unit 20 may be provided in the case (not shown) of the fixed unit 10.
The mounting part is provided and the portable part 20 is mounted on the mounting part.

In such a configuration, when the AC power supply AC is applied to the rectifying unit 11, the AC power supply AC is full-wave rectified by the diodes D1 to D4 connected in a bridge and converted into a pulsating current power supply. The capacitor C1 of the rectifying unit 11
Acts to remove noise components contained in the applied AC power supply AC. The pulsating current power supply output from the rectifying unit 11 is waveform-shaped by the waveform shaping unit 12, and
The noise component is removed and applied to the base of the transistor Q1.

When a pulsating power supply is applied to the base of the transistor Q1, the transistor Q1 is turned on / off according to the applied pulsating power supply, and in synchronization therewith, the resistor R1, the coil L1, the diode D5, and the transistor Q1. The current flowing through the collector-emitter path of R and the resistor R4 is interrupted. In this way, when the current flowing through the coil L1 is interrupted, an induction magnetic field is generated from the coil L1 and, as a result, an induction current is generated in the secondary coil L2 of the portable unit 20. The induced current generated in the secondary coil L2 is rectified by the diode D6 and supplied to the battery 21, which charges the battery 21.

[0015]

According to the present invention, the battery is charged by inducing the power source. Therefore, when charging the battery,
There is no need to pull the battery out of the device or connect the charging wires directly to the battery. Therefore, the charging operation becomes extremely simple and stable use can be achieved for a long period of time.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of the present invention.

[Explanation of symbols]

 10 Fixed part 11 Rectification part 12 Waveform shaping part 13 Power transmission part 20 Portable part 21 Battery AC AC power supply D1 to D6 Diodes C1 to C4 Capacitor Q1 Transistor L1 coil L2 Secondary coil

Claims (2)

[Claims] 1. A fixed part for rectifying and waveform-shaping an AC power supply to apply to a coil to generate an induced magnetic field, and a portable device provided in a portable device having a battery, for charging the battery by the induced magnetic field of the coil. A charging device characterized by comprising a section. 2. The charging device according to claim 1, wherein the fixing unit includes a rectifying unit that rectifies the AC power source to generate a pulsating current power source, and a waveform rectifying unit that shapes the output of the rectifying unit. A transmitter for transmitting the output of the waveform shaping unit and applying it to the coil, wherein the portable unit receives a secondary magnetic field generated by the coil, and an induction power source generated by the secondary coil. And a diode for rectifying the voltage and applying it to the battery.