JPS6271431A - Charger for small-sized electronic device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a charging device for a power source built into a small electronic device such as a pocket calculator, an electronic watch or clock, or a portable information device.

[Conventional technology]

Conventionally, as a rechargeable power source for small electronic devices such as electronic watches,
A combination of a secondary battery or a capacitor and ■ a solar cell, ■ a combination of a thermoelectric power generating element that utilizes the difference between body surface temperature and atmospheric temperature, and movement by the owner of a weight built into the device. A number of systems are well known, including a combination of micro-power generation driven by a power generator.

If you store it away, the built-in secondary power supply will eventually run out of energy and the clock will stop. Since solar cells and other devices have weak power to generate electricity, recharging can take anywhere from several hours to several weeks, depending on the capacity of the secondary power source. (Nowadays, people own multiple watches and use them for different purposes.) It is not easy to restart a watch.

The present invention eliminates this drawback and allows the user to recharge or periodically replenish the battery in a very short time (from a few seconds to several tens of minutes), yet does not require the same amount of power when carrying as a conventional power source. It is an object of the present invention to provide a main charging device or an auxiliary charging device (for example, used in conjunction with a solar cell) that does not require any conditions (illuminance, heat, motion, etc.) and can simplify the structure of electronic equipment. A further object of the present invention is to provide a small electronic device in which parts required for charging are integrated into the main body.

[Means for solving problems]

There is an opening on the outside of the case of a small electronic device.

- providing a permanent magnet that is rotated by the sliding motion of the roller;
The inside of the case includes a power generation coil that senses the rotation of the permanent magnet and generates electrical energy, a rectifier that rectifies the electrical energy, and a battery or a capacitor that stores the rectified electrical energy. It is characterized by

[Effect]

It has magnetic poles close to a permanent magnet that is rotated on the outside of the case, and electric energy is generated by magnetic induction in a power generation coil installed inside the case. This is rectified and stored in the secondary power supply.

〔Example〕

FIG. 1 is a back view and a side view of an electronic wristwatch which is an embodiment of the small electronic device of the present invention.

1 is a wristwatch case (non-magnetic material); 2 is a roller-shaped permanent magnet, which is magnetized so that magnetic poles are generated along the generatrix on the cylindrical surface, and is rotatably supported by a shaft 21; A part of the cylindrical surface of the magnet 2 slightly protrudes from the back surface of the case 1, and by sliding this part on a desk surface having a large coefficient of friction, the permanent magnet 2 can be moved at high speed. 3 is a power generating coil installed inside the case 1 together with a clock module (not shown), which includes two magnetic poles 61 (closely facing the magnetized cylindrical surface of the permanent magnet 20) and a magnetic core 6 coupled thereto.
2. It consists of a winding 33 wound around it. Both ends of the winding 33 are connected to a rectifier 4 inside the case 1, and its output is supplied to a secondary power source 5 to charge it. Note that 6 is a band attachment hole.

Although one embodiment has been described above, it is of course possible to provide configurations other than the above to the small electronic device, case, magnet, drive device thereof, power generation coil, charging device, etc. of the present invention. For example, adding a system to check the required timing or charging progress and display it to the outside of the electronic device, magnetizing the magnet with multiple poles, separating the magnet and sliding roller, and connecting them to a speed-increasing gear train. The power generation efficiency is increased by connecting the magnets with a mechanism, etc., the magnet is made into a flat plate and rotated parallel to the back of the case, and the magnetic pole tip of the power generation coil is brought closer to the permanent magnet surface by peeking out of the case.

All such matters fall within the scope of the present invention.

〔Effect of the invention〕

fll@VB uses an external permanent magnet, enabling powerful and rapid charging.

(2) The configuration of the electronic equipment side is simple and can be miniaturized.

(3) Since moving parts on the electronic device side can be eliminated, reliability is improved.

It is possible to charge the f4i electronic device even when it is not in a portable state.

(5) The necessary charging device is integrated with the electronic device, so there is no need to worry about losing it (and charging can be performed at any time).

[Brief explanation of drawings]

FIG. 1 is a back view and a side view of an electronic wristwatch which is an embodiment of the small electronic device of the present invention. 1... Case, 2... Permanent magnet, 3.
...Generating coil, 4... Rectifier, 5...
...Secondary power supply.

Claims (1)

[Claims] A permanent magnet rotated by sliding rollers is provided on a part of the outside of the case of the small electronic device, and inside the case there is a power generating coil that senses the rotation of the permanent magnet and generates electrical energy; A charging device for a small electronic device, comprising a rectifier that rectifies electrical energy, and a battery or a capacitor that stores the rectified electrical energy.