JP2000253621A - Generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To further reduce thickness in a manual generator in which a magnet and a coil is arranged with an axial gap in between. SOLUTION: A generator 1 is provided with a speed increasing mechanism 6 which increases rotating speeds given from the outside, a rotor section having a magnet 1 which is rotated at a high speed by means of the mechanism 6, and a stator section having a plurality of coils 21 constituting a magnetic circuit together with the magnet 19 of the rotor section 19 through an axial gap. The coils 21 arranged in the direction of rotation of the magnet 19 are partially thinned and part of the gears of the speed increasing mechanism 6 is the space of the thinned gear.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a generator, and more particularly to a thinned structure of a small manual generator.

[0002]

2. Description of the Related Art At present, a manual small-sized power generator is generally put into practical use. A speed increasing mechanism for increasing the rotation given by an external force or a linear motion converted from a linear motion, and a speed increasing mechanism provided by the speed increasing mechanism. A rotor section having a magnet to be rotated;
And a stator section having a coil arranged to face the magnet of the rotor section.

The speed increasing mechanism is constituted by combining a plurality of gears, and increases the speed of rotation given from the outside by several tens of times and transmits the rotation to the rotor.

[0004] The magnet of the rotor section has an N pole and an S pole in the direction of rotation.
The poles are alternately magnetized. On the other hand, a plurality of coils of the stator section are arranged in the rotating direction of the magnet, and form a magnetic circuit with the magnet.

When the magnet is rotated at a high speed by the speed increasing mechanism, an electromotive force is generated in the coil due to the magnetic action between the magnet and the coil to generate power.

By the way, it is desired that such a manual small-sized generator be made thinner in terms of portability and the like. Conventionally, in order to reduce the thickness, a structure in which a magnet of a rotor portion and a coil of a stator portion are arranged to face each other via a gap in an axial direction (a rotation axis direction) has been proposed.

[0007]

However, with a structure in which the magnet and the coil are simply arranged with a gap in the axial direction, the thickness of the entire generator cannot be made very thin, and there is a limit to the reduction in thickness.

[0008] The present invention has been made in view of the above points, and it is an object of the present invention to provide a structure capable of further reducing the thickness of a small generator.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a speed increasing mechanism for increasing the speed of rotation given from the outside, and a rotor section having a magnet rotated at a high speed by the speed increasing mechanism. And a stator having a coil that forms a magnetic circuit through a gap in the axial direction with the magnet of the rotor. This is a structure in which a part of the gear of the speed increasing mechanism is inserted into the space of the thinning out.

[0010] With such a structure, the generator of the present invention can be made thinner as much as the coils are thinned out, so that the generator can be made thinner.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings.

1 to 4 show a typical embodiment of the present invention. In the figure, 1 is a manual small generator according to the present invention as a whole, 2 is a base plate as its base, and 3 is a cover plate. The base plate 2 and the cover plate 3
Is connected and supported by columns 4 provided at the four corners,
Between the base plate 2 and the cover plate 3, a speed increasing mechanism for increasing the speed of rotation given from the outside, a rotor portion having a magnet rotated at a high speed by the speed increasing mechanism, and a magnet of the rotor portion And a stator unit having a coil forming a magnetic circuit via a gap in the axial direction.

First, the speed increasing mechanism will be described. This speed increasing mechanism includes a rotation input gear 5 and a speed increasing gear 6. The rotation input gear 5 and the speed increasing gear 6 are rotatably supported by fixed shafts 7 and 8 erected and fixed to the base plate 2, respectively.

A handle 9 as an operation member is integrally assembled with the rotation input gear 5. This handle 9
Is composed of a connection base 10 and a lever 11 extending from the connection base 10 in the outer peripheral direction. A knob 12 is provided at the tip of the lever 11.

The connecting base 10 is integrally assembled in a state of being placed on the rotary input gear 5, and the connecting projection 10 a is engaged with and connected to the connecting hole 5 a of the rotary input gear 5. Thus, the rotational force of the handle 9 is transmitted to the rotary input gear 5 as it is, that is, the rotary input gear 5 is rotated integrally with the handle 9.

The handle 9 has a lever 11
Is 180 ° with respect to the connection base 10 about the shaft 13 as a fulcrum.
It can be folded back, so that the structure of the knob 12 can be stored.

The speed increasing gear 6 is formed by integrally forming a small diameter gear portion 6a and a large diameter gear portion 6b, and the small diameter gear portion 6a meshes with the rotary input gear 5, while the large diameter gear portion 6b is connected to the rotor portion. It has a function of meshing with the gear to increase the speed of rotation of the rotation input gear 5 and transmitting the rotation to the rotor section.

A fixed shaft 8 for supporting the speed increasing gear 6 is provided.
Has a reinforcing effect as a structure supported on the cover plate 3 side.

The rotor portion is a rotating shaft 16 rotatably supported between the base plate 2 and the cover plate 3 via metal bearings 14 and 15, and is fixed to the rotating shaft 16, and the speed increasing gear is provided. 6, a gear 17 meshing with the large-diameter gear portion 6b, a disk-shaped rotary yoke 18 fixed to the rotary shaft 16 integrally with the gear 17, and a ring-shaped rotary yoke fixed to the lower surface of the rotary yoke 18. And a magnet 19.

Here, the magnet 19 has an N pole and an S pole in the rotation direction.
The poles are alternately magnetized, for example, by 12 poles, and a stator portion is arranged so as to face the magnet in the axial direction (rotation axis direction).

The stator section is provided with a coil 21 constituting a magnetic circuit via a gap in the axial direction with the magnet 19 on a circuit board 20 fixed to the base plate 2.

A plurality of the coils 21 are arranged in the rotation direction of the magnet 19, and here, particularly in the generator of the present embodiment, as shown in FIG. Is thinned out.

That is, from the beginning, nine of the coils 21 are arranged at a pitch of 40 ° in the entire circumference, but in this example, three of them are removed and the remaining six coils remove the stator portion. Is composed.

In the generator of this embodiment, the large-diameter gear portion 6b of the speed increasing gear 6 of the speed increasing mechanism is provided in the space where the coils are thinned out.
There is a structure into which.

In the above configuration, the six coils have a circuit configuration in which two coils are connected in series and three-phase power generation is performed, as shown in FIG.

Further, in the stator portion, each coil 2
At the center of 1, a convex convergent yoke 22 for improving magnetic efficiency is provided facing the magnet 19.

In this embodiment, the converging yoke 22 is used as the base plate 2.
That is, the base plate 2 is formed by using a part of the SPCC.
A part of the base plate 2 is formed into a convex shape by drawing, and this is formed into a convergent yoke 22.
And the coil 21 is wound therearound.

Further, on the circuit board 20, the rectifying components and the like of the circuit shown in FIG. 4 are mounted, and a connector 23 as a power generation output unit is mounted.

In the generator 1 of the present embodiment configured as described above, when the knob 12 of the handle 9 is picked up and turned by hand, the rotation is made from the rotation input gear 5 of the speed increasing mechanism via the speed increasing gear 6 to the rotor. Is transmitted to the part at approximately 20 times speed, and the magnet 19
Is rotated at high speed. When the magnet 19 is rotated in this way,
An electromotive force is generated in the coil 21 by the magnetic action between the magnet 19 and the coil 21 to generate power, and the current is output from the connector 23. In this power generation, three-phase power generation is performed by the circuit configuration shown in FIG.

In particular, in the structure of the generator 1 of this embodiment, a part of the plurality of coils 21 arranged in the rotation direction of the magnet 19 is thinned out, and a part of the speed increasing gear 6 of the speed increasing mechanism is provided in the space. By adopting this structure, the thickness of the entire generator can be reduced by the amount of the thinned-out coils, thereby enabling a significant reduction in thickness.

In the generator 1 of the present embodiment, a convex converging yoke 22 made of a magnetic material is provided at the center of each coil 21 of the stator portion, so that the magnetic flux is effectively converged with the magnet 19. As a result, the magnetic efficiency can be increased, so that the magnet can be used at a high operating point, and a large output can be obtained even with an inexpensive magnet.

Further, in the generator 1 of the present embodiment, the fixed shaft 8 which supports the speed-increasing gear 6 of the speed-increasing mechanism and the rotating shaft 16 of the rotor portion are provided.
Is a structure supported on both sides of the base plate 2 and the cover plate 3, so that it has sufficient strength against lateral pressure and impact and has a structural effect of being excellent in durability.

FIGS. 5 to 7 show another embodiment of the present invention, that is, an example of single-phase power generation in which two coils 21 of the stator section are provided. Incidentally, in this case, the magnet of the rotor portion is magnetized by four poles.

In this example, the power generation phase between the two coils a and b is slightly shifted as shown in FIG. 7, but this is connected in series as in the circuit shown in FIG. Output.

In the example of such a single-phase power generation, the above-described 3 phase power generation is used.
There is an advantage that the number of rectifying components can be reduced as compared with the phase power generation circuit configuration.

FIGS. 8 and 9 show an example of use of the generator according to the present invention. In this example, the present invention is applied to a portable charger 31 used for emergency charging of a mobile phone 30,
That is, the charger 31 has a form that can be attached to the mobile phone 30 with one touch, and the above-described generator 1 according to the present invention is incorporated therein.

The charger 31 is provided with a connector 23 which is an output terminal of a generator corresponding to a charging terminal provided on the bottom of the mobile phone 30. The charger 31 is mounted on the mobile phone 30. In this state, the connector 23 is connected to the charging terminal of the mobile phone 30.

In this state, the power is generated by the generator 1 by turning the knob 12 of the handle 9 of the generator 1 by hand, and the current is transmitted through the connector 23 to the portable telephone 30.
To be charged.

When the lever 11 of the handle 9 is turned back to the stored state, the knob 12
Is provided, and has a structure convenient for carrying.

As described above, according to the charger 31 incorporating the generator 1 according to the present invention, it is possible to easily and manually charge the battery of the portable telephone even when the battery of the portable telephone is exhausted at a place where the user is away from home.

FIG. 10 shows an example in which the generator 1 according to the present invention is incorporated in a stationary charger 33 used for normal charging of a mobile phone. That is, this charger 33 is
With a mobile phone inserted into the home
The battery is charged from a V power supply.
By incorporating the generator 1 according to the present invention inside the
Even when the household 100V power supply is interrupted, the mobile phone can be charged by turning the knob 12 of the handle 9 by hand.

Although the embodiments and use examples of the present invention have been described above, the present invention is not limited to these examples, and various other embodiments can be adopted. Can be.

For example, in the above-described example, the power is generated by turning the steering wheel. However, the power may be generated by converting the linear motion into rotation.

The number of coils in the stator section is not limited to 6 coils (3 phases), 2 coils (single phase), 3 coils (3 phases), 4 coils (2 phases) or more. Is also possible.

Further, the present invention can be widely used not only for a charger for a portable telephone but also for a charger for other various devices and other uses such as a generator for an electric lamp.

[0046]

As described above, according to the present invention, in a power generator having a structure in which a magnet and a coil are arranged via an axial gap, a part of a plurality of coils arranged in a rotating direction of the magnet is thinned out. By adopting a structure in which a part of the gear of the speed increasing mechanism is inserted into the space, the thickness of the entire generator can be reduced, and the thickness can be further reduced.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a generator according to the present invention.

FIG. 2 is a vertical sectional side view of the same.

FIG. 3 is a cross-sectional plan view taken along line AA of FIG. 2;

FIG. 4 is a circuit configuration diagram of the same.

FIG. 5 is a cross-sectional plan view showing another embodiment of the generator according to the present invention.

FIG. 6 is a circuit configuration diagram of the same.

FIG. 7 is an explanatory diagram of a shift in a power generation phase.

FIG. 8 is a perspective view showing a usage example of the generator according to the present invention.

FIG. 9 is a sectional view of the same.

FIG. 10 is a perspective view showing another example of use of the generator according to the present invention.

[Explanation of symbols]

1 ‥‥ generator, 2 ‥‥ base plate, 3 ‥‥ cover plate, 5 ‥
{Rotation input gear, 6} Speed-up gear (speed-up mechanism), 19}
{Magnet, 21} coil, 22} converging yoke

Claims (2)

[Claims] 1. A speed increasing mechanism for increasing the speed of rotation given from outside, a rotor section having a magnet rotated at a high speed by the speed increasing mechanism, and a magnet provided in an axial gap with the magnet of the rotor section. And a stator unit having a coil constituting a circuit, wherein a part of the plurality of coils arranged in the rotation direction of the magnet is thinned out, and a part of the gear of the speed increasing mechanism is provided in the space. A generator characterized by a structure that is entrapped. 2. The generator according to claim 1, wherein a convex yoke for increasing magnetic efficiency is provided at the center of each of the coils.