JPH0640709B2 - Charger for small electronic devices - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a charging device for a power supply incorporated in a small electronic device such as a pocket calculator, an electronic watch or a clock, and a portable information device.

[Conventional technology]

Conventionally, as a rechargeable power source for small electronic devices such as electronic wrist watches,
A combination of a secondary battery or capacitor and a solar cell, a combination of a thermoelectric generator that utilizes the difference between body surface temperature and atmospheric temperature, and movement of the weight built into the equipment by the owner. A large number of combinations of driven micro-generators are known.

[Problems to be solved by the invention]

In each conventional example, if the timepiece is not always worn and stored in a drawer or the like, the energy of the built-in secondary power source will be used up and the timepiece will stop. Since the power generated by solar cells and other devices is weak, recharging will take several hours to several weeks depending on the capacity of the secondary power source, so a wristwatch stored in a low-light place (already by one person It's an era where you have multiple clocks and use them properly) is not easy to restart.

The present invention eliminates this drawback and enables the user to recharge in a very short time (several seconds to several tens of minutes) or charge for regular power replenishment, and is similar to a conventional power supply when being carried. Main charging device or auxiliary charging device that does not need to give conditions (illuminance, thermal motion, etc.) and can make the structure of electronic equipment small and simple (for example, used in combination with solar cells)
The purpose is to provide. Another object is to eliminate the need for a device separate from the device for charging.

[Means for solving problems]

For example, in a small electronic device such as a main body of an electronic wristwatch, a power generating coil having a magnetic circuit having a magnetic pole toward the outside of the case and having an open magnetic circuit, and a secondary power source for accumulating electric energy generated by the coil are provided, and the size is small. The electronic device and a band for attaching the electronic device to an arm or the like are configured to be relatively slidable, and a large number of permanent magnets are arranged in the band.

[Action]

Unfold the band and place it on the desk, press and fix both ends with one finger, grasp the small electronic device with the other hand and violently slide and reciprocate within the length of the band. An alternating current is induced by the rapid change in the strong magnetic flux, which is rectified and charged.

〔Example〕

FIG. 1 is a rear view and a side view of one embodiment of the present invention, and FIG. 2 is a perspective view of essential parts showing a positional relationship between a magneto coil and a permanent magnet in the same embodiment.

Reference numeral 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 including a capacitor or a battery. 5 is a band for arm winding,
It penetrates the semi-tunnel-shaped groove of the case 1 and can slide with a small friction. A large number of strip-shaped permanent magnets 6 are embedded inside the band. The magneto coil 2 has a pair of magnetic poles 22 at both ends of a magnetic core 21 made of a high magnetic permeability material.
A winding wire 23 is applied to the wire 1. When the magnet 6 moves together with the band 5 in the direction of the arrow while the magnetic pole 22 and the permanent magnet 6 magnetized as shown in FIG. 2 are kept in the relational position shown in FIG. 2, the magnetic flux passing through the magnetic core is suddenly increased. It will be obvious that the power generation action will occur from both ends of the winding 23 under the change.

Although one embodiment has been described above, the case, the generator coil,
Various configurations and combinations are possible with a charging circuit, a secondary power source, a band, a permanent magnet, a sliding part of the band and the case, a permanent magnet, or an unillustrated display of the charging progress to the outside.

〔The invention's effect〕

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

(2) The electronic device has a simple structure and can be downsized.

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

(4) The electronic device can be charged even when it is not in a portable state.

(5) There is no risk of loss because the electronic device and power generation means are integrated.

[Brief description of drawings]

FIG. 1 is a rear view and a side view of one embodiment of the present invention, and FIG. 2 is a perspective view of essential parts showing a positional relationship between a magneto coil and a permanent magnet in the same embodiment. 1 ... Case, 2 ... Generator coil, 4 ... Secondary power source, 5
…… Band, 6 …… Permanent magnet.

Claims (1)

[Claims] 1. A small-sized electronic device, a generator coil with an open magnetic circuit for generating electric energy by the movement of a permanent magnet close to the outside, and a battery or capacitor for storing the electric energy, and A charging device for a small electronic device, wherein the device is slidably held on a band, and a permanent magnet having a large number of magnetic poles is arranged on the band.