KR200197905Y1 - A lantern having self-generation fuction - Google Patents

Abstract

The present invention relates to a self-powered lantern that can generate power by itself by embedding a small generator.

The present invention allows a lantern to be installed with a generator that is a source of human's natural kinetic energy. The generator generates induction current by using the relative motion of the permanent magnet and the coil, and a vibration system composed of a spring supporting the permanent magnet and the permanent magnet generates a relative displacement of the magnet by human movement. The springs were designed to resonate with the amplitude and frequency of the human during walking.

Therefore, the present invention drives the light emitting device by using a small generator capable of producing power only by human walking without a separate kinetic energy and power source, so it is possible to use it permanently without the need of a chemical cell as in the conventional case. It can fundamentally prevent environmental pollution caused by chemical cells. In addition, there is an advantage that can supply the surplus power to the other device by the service terminal.

Description

Portable light emitting device capable of self-power generation {A LANTERN HAVING SELF-GENERATION FUCTION}

The present invention relates to a portable light emitting device that converts electrical energy into light and illuminates the surroundings, and more particularly, to a self-powered lantern that can generate power by embedding a small generator therein.

In general, a lantern is a device that has a light bulb and a battery (especially a primary battery such as a battery) for powering the light bulb inside, and illuminates the light by operating the light bulb using a power source supplied from the battery.

As such, when a primary battery such as a battery is used as a power source for operating a light bulb, there is a problem that a new battery must be purchased and replaced whenever the battery is completely discharged by a load discharge or a natural discharge.

In addition, when a secondary battery capable of charging and discharging is used instead of a battery, a separate charging device for periodically charging the secondary battery is required.

Accordingly, in order to solve the problems of the prior art, Korean Patent Application No. 92-17174 (front and rear lanterns before self-power generation) discloses a rear lantern before self-power generation that generates electric energy using an artificial rotational force of a lantern user. .

However, in the case of the patent application, since the user must artificially drive the generator every time to produce electrical energy, energy efficiency and convenience are inferior.

Therefore, the inventors have developed a lantern that can convert the natural vibration energy generated by human movement into electrical energy.

That is, the present invention is characterized by generating an induced current by relative movement of the permanent magnet and the coil supported by the spring by the vibration generated by human behavior, and using it as a power source for operating the light emitting device.

A first object of the present invention is to provide a portable light emitting device that can produce electrical energy using natural kinetic energy generated by human movement, and can use the electrical energy as a driving power source of the light emitting device.

A second object of the present invention is to design a vibrometer that is resonant with human behavior so that the permanent magnet providing time-varying flux to the coil can be infinitely vibrated.

The portable light emitting device of the present invention for achieving the above object includes a light emitting portion for emitting light and a handle portion for helping the user grip.

The portable light emitting device includes a light emitting device for emitting light to the outside, and a small generator for producing electrical energy required by the light emitting device.

In addition, the small generator is supported by a spring, the permanent magnet to generate a time-varying magnetic flux by vibrating according to the movement of the user carrying the light emitting device; and induced current generated by the time-varying magnetic flux generated from the permanent magnet It includes a coil.

At this time, the spring coefficient of the spring element is designed such that the vibration and the external vibration (vibration according to the walking behavior of the user) of the vibration system consisting of the permanent magnet and the spring element. Accordingly, a relatively large displacement is formed between the permanent magnet and the coil despite the small movement of the user, thereby producing a large power.

This resonance is made possible by designing a vibrometer so as to satisfy the following expression (1).

ω = = ω _d ㆍ ········· (1)

(Where ω is the frequency of the permanent magnet supported by the spring, ω _d = the frequency of the external force according to the movement of the pedestrian, k is the spring coefficient supporting the permanent magnet, m is the mass of the permanent magnet)

In addition, the portable light emitting device of the present invention may additionally include an electric power storage device for accumulating electric energy generated by the generator, and discharging the accumulated electric energy to the light emitting device.

In addition, the portable light emitting device of the present invention may additionally include a service connector for supplying the electrical energy accumulated in the power storage device to external electric and electronic devices.

Other objects and advantages of the present invention will be described below and will be appreciated by practice of the present invention. In addition, the objects and advantages of the present invention can be realized by means and combinations shown in the appended utility model registration claims.

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate the presently preferred embodiments of the invention and, together with the description of the following preferred embodiments, serve to explain the principles of the invention.

1 is a longitudinal sectional view for explaining the internal configuration of a lantern according to the present invention.

2 is a modeling diagram for explaining a primary induction vibration system subjected to the ground vibration.

Figure 3 is a graph for explaining the resonance phenomenon for the small generator of the present invention.

4 is a block diagram of a charge and discharge circuit built in the lantern of the present invention.

5 is a view for explaining the configuration of another embodiment of a lantern according to the present invention.

<Description of the symbols for the main parts of the drawings>

2: housing 3a, 3b, 3c: permanent magnet element

4a, 4b: spring 5a, 5b, 5c: coil element

6: capacitor 7: secondary battery

8: light emitting element 10: connector

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention in detail.

1 shows the internal structure of a portable light emitting device (ie, a lantern) according to the present invention in detail.

The light emitting device 1 of the present invention can be largely divided into a light emitting part and a handle part.

The light emitting portion consists of a light emitting element 8 and an illumination shade 9 surrounding the light emitting element. The light emitting element 8 is a device for converting electrical energy into light energy and includes a general light bulb or LED (light emitting diode).

The small generator 16 is mounted in the housing 2 constituting the handle portion, and the handle portion preferably has a rod shape so that the user can easily grip the handle.

In addition, power storage elements such as a secondary battery 7 or a capacitor 6 are disposed at a boundary point of the light emitting part and the handle part. The capacitor 6 is a device that temporarily stores the induced electromotive force generated in the small generator. The secondary battery 7 receives the leveled-up voltage from the capacitor 6 to store this electric energy and discharges it for the light emitting element 8.

In addition, the configuration of the charge and discharge circuit for the lantern of the present invention via the capacitor and the secondary battery is shown in FIG.

As shown in FIG. 4, the charge / discharge circuit of the present invention includes the small generator 16, the capacitor 11, the setup converter 12, the secondary battery 13, and a peak power compensation unit ( 15), microcontroller 14 and load 17.

The capacitor 11 is a device for temporarily charging the power produced by the small generator 16 is superior in energy storage efficiency than conventional chemical cells.

The set-up converter 12 is a device for supplying electric power charged at a low voltage level to various devices, and is designed to match a static voltage operating for each device.

The secondary battery 13 has been used for long-term preservation of the power produced by the small generator 16.

The microcontroller 14 performs a function of efficiently managing the power produced by the small generator.

The peak power compensation unit 15 is mounted so that the entire system does not stop the operation when the external load 17 connected to the service connector 10 to be described later requires a lot of power. However, do not use if there is no service load.

The load 17 represents a light emitting device or an external electric or electronic device.

In addition, the small generator is composed of a permanent magnet (3), spring elements (4a, 4b), and a coil (5).

At both ends of the permanent magnet 3, there are grooves (not shown) or fixing jaws (not shown) for accommodating the spring elements 4a and 4b, and the spring elements 4a are provided in the grooves or jaws. And 4b), the permanent magnet 3 is supported by the spring element. The permanent magnet supported by the spring element forms a vibration system as shown in FIG.

On the inner wall of the housing 2 surrounding the permanent magnet 3, a coil 5 (to be precisely referred to as a bobbin wound around the coil) is disposed.

The spring elements 4a and 4b are selected such that the spring coefficient k is substantially such that the frequency ω _d generated according to the user's behavior and the frequency ω of the vibration system made of a permanent magnet supported by the spring element are substantially matched. do. That is, the spring coefficient of the spring element should be selected so that the vibration of the vibration system resonates with the vibration by the external force.

In this way, when the vibration of the vibration system resonates with the vibration caused by the external force, the permanent magnet constituting the vibration system can vibrate infinitely despite the minute external vibration, so that the induced magnetic flux change per unit time generated in the coil increases. EMF can be increased. Accordingly, a large relative displacement is formed between the permanent magnet 3 and the coil 5 even with a small movement of the user, thereby enabling efficient power production.

This will be described with reference to FIGS. 2 and 3 as follows.

FIG. 2 is a diagram illustrating modeling of a primary induction vibration system subjected to base excitation. FIG. That is, in Figure 2, the ground vibration represents the vibration according to the movement of the user carrying the lantern of the present invention, the mass m represents the mass of the permanent magnet, the spring coefficient k represents the spring coefficient of the spring element.

The mathematical equation of motion for the physical model of FIG. 2 is as follows.

m (d ² x / dt ² ) + c (dx / dt) + kx = Ysinω _d t

Where m is the mass of the permanent magnet, c is the damping coefficient, k is the spring coefficient, x is the displacement of the mass, Y is the amplitude of the ground vibration, and ω _d is the frequency of the ground vibration.

If the solution of the equation of motion is solved and the displacement of mass is dimensionless to the amplitude of the ground vibration, it is summarized as the following equation.

X / Y = [{1+ (2ζr) ² } / {(1-r ² ) ² + (2ζr) ² }] ^1/2

Where X is the mass amplitude, ζ is the damping ratio, and r = (ω _d / ω) is the frequency ratio (frequency ratio of mass to base frequency)

In the above equation, X / Y indicates the degree of vibration of the mass transmitted from the base vibration to the vibrometer.

As can be seen from FIG. 3, there is no attenuation of the vibration system, and it can be seen that infinite vibration occurs when the frequency of the ground vibration and the frequency of mass coincide, that is, r = 1. This phenomenon is called resonance.

In order to suppress the vibration, the vibration system should be designed to avoid resonance, but in the present design, the relative motion of the permanent magnet must exceed the installation position of the coil, and the frequency should be large because the power generation efficiency increases when the frequency is fast.

Design the remaining variables of the vibrometer based on the mass (m) of the permanent magnet, which is already determined, but consider it as a non-damping vibrometer with no viscosity and adjust only the spring coefficient (k) to cause resonance. In other words, the vibration system is designed to generate human walking behavior and resonance.

That is, in order for resonance to occur in the vibration system, the spring coefficient of the spring element must satisfy the following Equation (2).

ω = = ω _d (·)

Where ω is the frequency of the permanent magnet supported by the spring, ω _d = the frequency of the external force according to the movement of the pedestrian, k is the spring coefficient supporting the permanent magnet, and m is the mass of the permanent magnet. If the spring coefficient that supports the permanent magnet is satisfied so as to satisfy the formula of (2), the permanent magnet forms a large relative displacement with respect to the coil in conjunction with the movement of the user's walking light, thereby efficiently producing power. Become.

In FIG. 1, reference numeral 10 denotes a service connector 10 for supplying electrical energy accumulated in the capacitor 6 or the secondary battery 7 to external electric and electronic devices.

That is, by connecting the service connector 10 to an external electric or electronic device, the induced electric energy generated in the lantern may be used for driving other devices.

1 illustrates a case in which the permanent magnet 3 and the coil 5 are singly present, but the present invention is not necessarily limited thereto. Another possible embodiment of the present invention is shown in FIG. 5.

That is, in FIG. 5, the permanent magnets are formed by stacking a plurality of permanent magnet elements 3a, 3b, and 3c in multiple stages, and thus, the coils may also correspond to the permanent magnet elements 3a, 3b, and 3c. The structure in which the elements 5a, 5b, and 5c (to be precisely defined, a coil wound bobbin) are laminated in multiple stages is shown.

As such, when the permanent magnet and the coil have a multi-layered structure, a large induction current can be obtained even with a small movement of the user, which is preferable to the single structure of FIG. 1.

Hereinafter, the operation of the lantern having the above-described configuration will be described in detail.

When the user carrying the lantern of the present invention moves, a minute vibration is generated in the lantern 1, and the spring elements 4a and 4b in the housing 2 of the handle part vibrate according to the minute vibration.

When the spring elements 4a and 4b vibrate, the permanent magnets 3 supported by the spring elements also vibrate. At this time, since the spring coefficient k of the spring elements 4a and 4b is selected so that the vibration system composed of the spring element and the permanent magnet is resonant with the ground vibration according to the user's behavior, infinite vibration is generated in the permanent magnet 3. do.

As the permanent magnet 3 vibrates relative to the coil 5, a variable magnetic flux is generated in the coil 3. Accordingly, induction electromotive force is generated at both ends of the coil 5 according to Faraday's law of induction.

The induced current flows through the coil 5 by this induced electromotive force. This induced current is temporarily accumulated in the capacitor 6 or permanently stored in the battery 7 via the charging circuit as shown in FIG.

The accumulated energy is supplied to the light emitting element 8 of FIG. 1 or to external electric and electronic devices via the service connector 10 of FIG.

The present invention is not limited to the above-described embodiment, and various modifications within the equivalent scope of the technical concept of the present invention and the utility model registration claims to be described below by those skilled in the art to which the present invention belongs. Of course, variations are possible.

The present invention drives the light emitting device using a small generator capable of producing power only by human walking without separate kinetic energy and power, so it can be used permanently without the need for chemical cells, and environmental pollution by chemical cells for lanterns. Fundamentally can be prevented. In addition, there is an advantage that can supply the surplus power to the other device by the service terminal.

Claims (5)

A portable light emitting device comprising a light emitting part for emitting light and a handle part for helping a user grip the light, In the body of the portable light emitting device includes a light emitting element (8) for emitting light to the outside, and a small generator (3, 4a, 4b, 5) for producing the electrical energy required by the light emitting element; The small generator (a) a permanent magnet (3) supported by the spring elements (4a, 4b) and vibrating in conjunction with the movement of the user carrying the light emitting device; (b) a coil (5) for inducing an induced current generated according to the time-varying flux generated from the permanent magnet (3); (c) the spring coefficient k of the spring element is determined such that a vibration system made of a permanent magnet supported by the spring element can be resonated with the ground vibration (vibration according to the walking behavior of the user); As a result, the portable light emitting device according to claim 1, wherein the permanent magnet supported by the spring holder vibrates the inside of the coil so as to efficiently supply the electric energy generated in the coil to the light emitting device. The method of claim 1, And a power storage element (6, 7) for accumulating electric energy generated by the generator and discharging the accumulated electric energy to the light emitting element (8). The method of claim 2, The small generator is a portable light emitting device, characterized in that embedded in the handle portion of the light emitting device. The method of claim 2, And a service connector (10) for supplying the electric energy stored in the power storage elements (6, 7) to external electric and electronic devices. The method according to claim 2 or 5, The permanent magnet is formed by stacking one or more permanent magnet elements 3a, 3b and 3c in multiple stages, and the coil also includes one or more coil elements 5a, 5b and 5c as the permanent magnet elements 3a, 3b and 3c. Portable light emitting device, characterized in that the stack is formed in multiple stages to correspond to.