JPS6271432A - 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, rechargeable power supplies for small electronic devices such as electronic watches have been made by combining secondary batteries or capacitors, ■ solar cells, and ■ thermoelectric power generation elements that utilize the difference between body surface temperature and atmospheric temperature. (2) A combination of a micro-power generator that is driven by the movement of a weight built into the device by the holder, and the like are widely known.

[Problem that the invention seeks to solve]

In each conventional example, if a watch is not worn all the time and is stored in a drawer, etc., the energy of the built-in secondary power source will eventually be used up and the watch will stop. Because solar cells and other devices generate weak power, recharging can take anywhere from several hours to several weeks, depending on the capacity of the secondary power source, so if you have a watch stored in a low-light area (already alone), We live in an era where people own multiple watches and use them for different purposes.) It is not easy to restart a watch.

The present invention eliminates this shortcoming and allows the user to recharge or periodically replenish power in a very short time (from a few seconds to several IO minutes), while still being portable like a conventional power source. Main charging device or auxiliary charging device (for example, used in conjunction with solar cells) that does not require conditions (illuminance, thermal movement, etc.) and can simplify the structure of electronic devices.
provided.

The purpose is to It also aims to eliminate the need for a separate device from the device for charging.

[Means for solving problems]

For example, a small electronic device such as the main body of an electronic wristwatch is equipped with a power generation coil with an open magnetic circuit and a magnetic pole facing the outside of the case, and a secondary power source that stores the electrical energy generated by the coil. The electronic device and the band that attaches it to the arm or the like are configured to be slidable relative to each other, and a large number of permanent magnets are arranged inside the band.

[Effect]

Unfold the band, place it on a desk, press and fix both ends with the fingers of one hand, grab a small electronic device with the other hand, and violently slide and reciprocate within the length of the band.The magnetic core of the generator coil Rapid changes in strong magnetic flux induce an alternating current, which is rectified and charged.

〔Example〕

FIG. 1 is a back view and a side view of an embodiment of the present invention, and FIG. 2 is a perspective view of a main part showing the positional relationship between a power generating coil and a permanent magnet in the same embodiment.

1 is a case of a small electronic device, 2 is a power generating coil provided inside, 3 is a charging circuit including a rectifier, and 4 is a secondary power source consisting of a capacitor, battery, etc. 5 is a wristband,
The case 10 passes through a half-tunnel-shaped groove and can slide with little friction.

A large number of rectangular permanent magnets 6 are embedded inside the band. The power generating coil 2 has a pair of magnetic poles 22 at both ends of a magnetic core 21 made of a high magnetic permeability material, and the magnetic core 21 is provided with a winding 26 . When the magnet 6 moves in the direction of the arrow along with the band 5 while the magnetic pole 22 and the permanent magnet 6 magnetized as shown maintain the relative position shown in FIG. 2, the magnetic flux passing through the magnetic core suddenly increases. It is obvious that a power generation action occurs from both ends of the winding 260 in response to the change.

Although one embodiment has been explained above, the case, the generating coil,
Various configurations and combinations are possible using the charging circuit, secondary power source, band, permanent magnet, sliding portion of the band and case, permanent magnet, or an external display of the charging progress (not described).

〔Effect of the invention〕

(1) Powerful and rapid charging is possible because a permanent magnet is used outside the device.

(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.

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

(5) The electronic device and power generation means are integrated, so there is no risk of loss.

[Brief explanation of drawings]

FIG. 1 is a back view and a side view of an embodiment of the present invention, and FIG. 2 is a perspective view of a main part showing the positional relationship between a power generating coil and a permanent magnet in the same embodiment. 1...Case, 2...Generating coil, 4
...Secondary power supply, 5...Band, 6...
····permanent magnet. Figure 111Figure 2

Claims (1)

[Claims] A small electronic device includes a generator coil with an open magnetic circuit for generating electric energy by the movement of a permanent magnet close to the inside and outside, and a battery or a capacitor for storing the electric energy, and the device is attached to a band. A charging device for a small electronic device, which is slidably held and has a permanent magnet having a large number of magnetic poles arranged in the band.