JP2021175360A - Human-powered generator - Google Patents

Abstract

To solve a problem that a simple power generation method for the developing countries where there is no power supply is also applied to a power generation method useful at the time of a disaster in the developed countries; considering a human-powered generator used in such an application, a practical output cannot be produced continuously by a conventional human-powered generator relying on only muscle strength.SOLUTION: The present invention uses a method of resonance in which a human can greatly swing a spring mechanism by shifting his or her weight. A human riding on an oscillatory mechanism applies, as external force, weight shift, such as bending or jumping, in accordance with a motion period of the oscillatory mechanism, thereby increasing an oscillatory motion. The thus increased oscillatory motion is transmitted to a power generator and converted into electricity.SELECTED DRAWING: Figure 1

Description

The present invention relates to a device that generates electric power by human power.

Conventional human-powered generators have the ease of being able to generate electricity by rotating or walking a bicycle.

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Japanese Unexamined Patent Publication No. 2010-57347 Japanese Unexamined Patent Publication No. 2015-122816

However, with these methods that rely only on muscle strength, it is difficult to obtain electric power exceeding 100 W, and it cannot be said that it is a practical generator. An object of the present invention is to provide a human-powered generator capable of generating a large amount of power by combining human power with a spring.

For this purpose, in the spring-mass system with the human body as the weight, the present invention applies human weight movement such as bending and stretching and jumping as an external force in a timely manner according to the natural period of vibrational motion to cause resonance. Think about causing. This vibrational motion increased by resonance is converted into electricity by a generator.

As a typical spring vibration mechanism, there is a playset (hopping) shown in FIG. 3, and these spring mechanisms have a property of repeating vibration at regular intervals. The reason why young people can't ride this playset well is because they ignore this natural cycle and try to move it, so that older people can increase the vibration by adjusting the weight shift to this cycle. become. By utilizing this ability of human beings, it is possible to generate electricity efficiently without relying solely on muscle strength. The description of this means is as follows.

(Item 1)
It is a human power generator consisting of a spring vibration mechanism that vibrates with the movement of human weight, a transmission mechanism that transmits the force, and a power generation mechanism that receives the force to generate electricity.

(Item 2)
A rack and pinion mechanism is used for the transmission mechanism, and the pinion reverses forward and reverse with the vibration of the vibration mechanism to transmit a rotational force to the power generation mechanism.

(Item 3)
A ball screw mechanism is used for the transmission mechanism, and the vibration of the vibration mechanism causes the ball nut of the ball screw mechanism to move linearly, rotate the screw shaft, and transmit the rotational force to the power generation mechanism.

(Item 4)
A one-way clutch is provided in the output section of the transmission mechanism so that the rotation can be performed in only one direction.

According to this method, the force due to weight movement such as bending and stretching and jumping can be applied to the vibration mechanism in a timely manner as if it bounces by hopping, so a large force can be transmitted to the power generation mechanism with a relatively small force, and several hundreds. It becomes possible to sustain the power generation of W.

Schematic diagram of the human-powered generator according to the first embodiment of the present invention Schematic diagram of the human power generator according to the second embodiment of the present invention. Explanatory drawing of the spring vibration mechanism used in hopping Explanatory drawing of the configuration example of the power generation mechanism

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Hereinafter, embodiments of the present invention will be described with reference to the accompanying figures.

FIG. 3 is a vibration mechanism 1 of a commercially available playset. When a person rides on a tread and shifts his weight at the right time, resonance occurs and a large jump is possible.
The natural period T of the vibration mechanism 1 using a spring can be expressed as follows from the human mass M and the spring constant K.

Since human beings can acquire these natural cycles by the senses of the body, they can appropriately move their weight and achieve a large jump. The potential energy W due to weight movement is as follows, where m is the mass of the jumper, g is the gravitational acceleration, and h is the amount of movement of the center of gravity.

From this equation, assuming that the amount of movement of the center of gravity of a jumper with a weight of 50 kg is 1 m, the increase in potential energy can be determined by adjusting the spring constant of Mgh = 50.9.8.1 = 490J = 490Ws. In 1.6 seconds, 490 Ws ÷ 1.6 s = 300 W, which is the average power given to the generator.

The hopping has a structure in which the entire device jumps up, but considering the use indoors, the whole is changed to a structure in which only the spring and the tread are vibrated on the support base as shown in FIG. Then, since the space for a human to ride is sufficient, it can be installed in an area of about 30 cm × 30 cm.
As shown in FIG. 1, the vibration mechanism 1 is composed of a support base, a spring, a tread plate, a support rod, and a handle, and the transmission mechanism 3 is composed of a rack and pinion. The weight shift on the tread becomes vibration of the tread, and the pinion on the tread is rotated by a rack fixed to the floor, which gives a rotational motion to the power generation mechanism 2.

FIG. 2 is a second embodiment of the present invention. This uses a ball screw as the transmission mechanism 3. The vibration of the tread plate causes the ball nut to move, which gives rotation to the ball screw and the power generation mechanism 2 connected to the ball screw.

FIG. 4 shows two types of examples of the power generation mechanism 2, a method of rotating the generator by forward and reverse rotation and a method of rotating the generator by unidirectional rotation. When the vertical vibration of the tread is converted into rotation, it becomes forward / reverse rotation. The first method is to generate electricity as it is by rotating forward and reverse, rectify the AC output, convert it to DC, smooth it, and charge the battery. The second method is to convert forward / reverse rotation into one-way rotation with a one-way clutch, input it to a generator, smooth the DC output, and charge the battery.

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1 Vibration mechanism 2 Power generation mechanism 3 Transmission mechanism

Claims (4)

A human-powered generator consisting of a vibration mechanism that vibrates with the movement of human weight, a transmission mechanism that transmits the force, and a power generation mechanism that receives the force to generate electricity. A rack and pinion mechanism is used for the transmission mechanism, and the pinion reverses forward and reverse with the vibration of the vibration mechanism to transmit the rotational force to the power generation mechanism.
The human-powered generator according to claim 1. A ball screw mechanism is used for the transmission mechanism, and the ball nut of the ball screw mechanism moves linearly due to the vibration of the vibration mechanism, rotates the screw shaft, and transmits the rotational force to the power generation mechanism. The human-powered generator described in. The human-powered generator according to claim 2 or 3, wherein a one-way clutch is provided in the output unit of the transmission mechanism so that the one-way clutch rotates in only one direction.

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