JPH11122869A - Hand generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hand generator which can attain both power generating capability and portability at a higher dimension. SOLUTION: A crank handle 6 for giving rotational force to a rotating machine 3 for power generation is formed so as to be attachable and detachable to/from the shaft of the rotating machine 3. A storage part 5 of an arm 6a in the crank handle 6 is formed integrally at a casing 4 which stores the rotating machine. With an arm of adequate length for applying rotating force ensured, the crank handle 6 is formed so as to have no interference when it is carried. Especially, by connecting a variable resistor 10 to one of the output terminal of the rotating machine 3, it is possible to adjust a power generating current for setting it to rotational torque as desired.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art In recent years, portable electronic devices, such as telephones, video cameras, personal computers, and the like, which are configured to operate with a chargeable / dischargeable secondary battery, have been widely used.

[0003]

However, it is necessary to charge the secondary battery contained therein in a timely manner using a dedicated charger from a commercial power supply of 100 VAC.
If you do not always pay attention to the remaining amount, it may be impossible to use it halfway. Moreover, devices that use them are generally used outdoors where outlets are not installed,
Charging on the spot was almost impossible.

[0004] It is very convenient to have a manual generator that can be carried around.
The generated voltage is determined by the rotation speed, and the required torque increases as the generated current increases.Therefore, in order to obtain a desired power generation capacity, it is necessary to secure a sufficient arm length of the crank for applying the rotation force to the generator. However, portability had to be reduced.

The object of the present invention is to solve such problems and to provide an improved manual generator for achieving a higher level of compatibility between power generation capability and portability. It is a thing.

[0006]

In order to achieve the above object, in the present invention, a crank handle 6 for applying a rotating force to the generator rotating machine 3 is configured to be detachable from a shaft of the rotating machine. The accommodating portion 5 of the arm portion 6a of the crank handle is provided integrally with the casing 4 accommodating the rotating machine. With this, it is possible to secure the arm length sufficient to give the rotational force, and to prevent the crank handle from getting in the way when carrying. In particular, if the variable resistor 10 is connected to one of the output terminals of the rotating machine, it is possible to adjust the generated current and set the rotation torque as desired.

[0007]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

1 to 7 show a manual generator constructed according to the present invention. The generator 1 accommodates a speed-increasing gear device 2 and a DC rotating machine 3 which are directly connected to each other coaxially in a large-diameter portion 4a of a casing 4 having a gourd-shaped cross section orthogonal to the axis. It becomes.

The small diameter portion 4b of the casing 4 has a through hole 5 extending in a direction parallel to the axes of the speed increasing gear device 2 and the rotating machine 3.
Are provided in the through-hole 5 and the speed increasing gear device 2 is provided.
, A crank handle 6 for applying a rotating force to the rotating machine 3 can be held. The crank handle 6 includes a rod-shaped arm 6a and a grip 6b rotatably provided on one end of the arm 6a on an axis A orthogonal to the arm 6a. Can be inserted. Then, as shown by the two-dot chain line in FIG.
When the arm 6a is inserted into the inside, the casing 6 has a shape along the contour of the end face of the casing 4. This crank handle 6
Is taken out of the through hole 5, the other end of the square hole 7 is engaged with the shaft end of the input shaft 8 of the speed increasing gear device 2, and the grip 6 b is rotated to generate a DC current in the rotating machine 3. it can.

An adjusting knob 11 of a variable resistor 10 described later is provided on an end wall 9 of the large diameter portion 4a of the casing 4 on the side opposite to the input shaft.
And a light emitting diode 12 for display during charging, and a printed circuit board 13 on which these are mounted is accommodated in the large diameter portion 4 a of the casing 4. A terminal (not shown) of the lead wire 14 drawn from the end wall 9 on the side opposite to the input shaft of the large-diameter portion 4a of the casing is provided with a socket (not shown) to be connected to a charging plug of a partner device.

As shown in FIG. 8, a plus terminal of the rotating machine 3 is connected to a series-connected variable resistor 10 for current adjustment.
The negative terminal of the rotating machine 3 is directly connected to the negative side 16m of the socket via a zener diode 15 for voltage setting and a voltage-setting zener diode 15. The light emitting diode 12 is connected between the poles 16p and 16m of the socket via a protective resistor 17.

On the other hand, a chargeable / dischargeable secondary battery 20 and a switch 2 are provided between both poles 19p and 19m of a plug of a portable telephone 18 as an example of a target device of the generator 1.
1 are connected to both poles of the communication circuit 22. The communication circuit 22 is connected with a resistor 23 and a zener diode 24 for setting the voltage applied to the communication circuit 22 to a constant voltage lower than the rated voltage of the battery 20.

According to this, if the rotating machine 3 generates a voltage slightly higher than the operating voltage of the communication circuit 22 by the Zener diode 15 when the rotating machine 3 is rotated, a current flows into the secondary battery 20. To indicate that the light emitting diode 12 is being charged. At this time, by adjusting the variable resistor 10 to appropriately limit the charging current, the time required for charging is increased, but the torque required for rotating the rotating machine 3 can be reduced. When the battery 20 reaches a full charge, the current stops flowing in balance with the voltage generated by the rotating machine 3.

The rotation speed of the rotating machine 3 is determined by a required voltage, and a rotation torque required to generate the voltage is determined by a speed increase ratio of the speed increasing gear device 2. If the speed increase ratio is increased, the input rotation speed for obtaining the required output rotation speed can be reduced, but a correspondingly large input rotation torque is required. Conversely, if the speed increase ratio is reduced, the input rotation torque can be reduced, but the input rotation speed for obtaining the required voltage must be increased. In any case, charging cannot be performed unless a predetermined rotation speed is continuously applied to the rotating machine 3, so that the rotation torque for obtaining the predetermined rotation speed can be arbitrarily changed according to individual differences among users. It is desirable.

However, providing the means for changing the speed increase ratio leads to a complicated structure and an increase in size, so that it is not practical for portable equipment which is desirably lightweight and inexpensive. The turning radius of the crank handle 6 (the arm 6
Although it is possible to increase the apparent rotational torque by increasing the length dimension of “a”, this is also not preferable because it also deteriorates operability and portability. Therefore, in the present invention, the required rotational torque can be adjusted steplessly in accordance with the physical strength of the user without deteriorating operability or portability, and without causing an excessive increase in weight or manufacturing cost. The second characteristic is that the charging current is limited by the variable resistor 10 to thereby reduce the rotational torque of the rotating machine 3 required for power generation.

Instead of the variable resistor 10, the connection of a plurality of fixed resistors may be switched by a switch so that the resistance value changes stepwise.

[0017]

As described above, according to the present invention, an arm having a length capable of giving a sufficient rotational force to the rotating machine to generate electric power can be housed without hindering the use of the rotating machine, thereby impairing portability. And a desired power generation capacity can be obtained without using the same. Therefore, when using the electronic equipment outdoors, there is no need to worry too much about the remaining battery level, so it is necessary to bring a spare battery even when using the electronic equipment in a remote place where it is not easy to obtain power. A great effect is obtained, such as disappearance of.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a generator according to the present invention.

FIG. 2 is an external perspective view of a generator according to the present invention.

FIG. 3 is a front view of the generator according to the present invention.

FIG. 4 is a right side view of the generator according to the present invention.

FIG. 5 is a left side view of the generator according to the present invention.

FIG. 6 is a plan view of a generator according to the present invention.

FIG. 7 is a bottom view of the generator according to the present invention.

FIG. 8 is a schematic circuit diagram of a generator according to the present invention and a telephone connected thereto;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 generator 2 speed increasing gear device 3 rotating machine 4 casing 5 through hole 6 crank handle 7 square hole 8 input shaft 9 end wall 10 variable resistor 11 adjustment knob 12 light emitting diode 13 printed circuit board 14 lead wire 15 Zener diode 16 socket Terminal 17 Resistance 18 Telephone 19 Plug terminal 20 Secondary battery 21 Switch 22 Communication circuit 23 Resistance 24 Zener diode

Claims (2)

[Claims] 1. A crank handle for applying a rotating force to a rotating machine for power generation is configured to be detachable from an input shaft of the rotating machine, and a housing portion of an arm portion of the crank handle houses the rotating machine. A manual generator characterized by being provided integrally with a housing formed. 2. The manual generator according to claim 1, wherein a variable resistor is connected to one of output terminals of the rotating machine.