JP2008125164A - Power generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power generator achieved in miniaturization and low profile, and in reduction in manufacturing cost and simplification in manufacturing process. <P>SOLUTION: The power generator is provided with a stereoscopic insulative base material 1 having a cylindrical space 1a for a magnet and a capacitor housing which are formed therein; a magnet 3 housed rotatably or slidably in the cylindrical space 1a for a magnet of the insulative base material 1; a capacitor 5 buried in the capacitor housing of the insulative base material 1; a thin-film coil 2 formed substantially orthogonally to the longitudinal direction of the cylindrical space 1a for a magnet on the surface of the insulative base material 1; a circuit board 7 on which the insulative base material 1 is mounted; and a circuit pattern 4 formed on the surface of the insulative base material 1 and making the thin-film coil 2, the capacitor 5 and the circuit board 7 conductive with one another. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a power generation apparatus that generates power by moving a magnet in a cylindrical coil.

  Conventionally, as a small power generator, a power generator described in Patent Document 1 below is known. This power generation device is intended to enable power generation by vibration, movement of a person, movement of a vehicle, etc., and to reduce the consumption of a battery built in an electronic device or to eliminate the need for a battery.

Specifically, as shown in a partial cross-sectional view of FIG. 2, the conventional power generator is configured by putting a magnet 102 inside a coil bobbin 101 and winding a coil 103 of a conductive wire of the coil bobbin 101. Coil In such a power generator, the magnet 102 is moved by vibration or the like, and power is generated by the movement. The current generated by this power generation charges the capacitor 105 via the conductive wire 104 connected to the coil 103. At this time, the generated current flows to the capacitor 105 mounted on the mounting substrate 108 via the lead wire 106 and the solder 107 integrated with the coil bobbin 101.
Japanese Patent Laid-Open No. 10-42540

  However, in the configuration of the power generation device described above, the problem is that the mounting area is large due to the large number of parts, the problem is that the cost is high due to the large number of parts, and the electrical connection is realized due to the large number of parts. There is a problem that a lot of labor is required for the manufacturing process.

  Therefore, the present invention has been proposed in view of the above-described circumstances, and provides a power generator capable of realizing a reduction in size and a height, a reduction in manufacturing cost, and a simplification of a manufacturing process. For the purpose.

  In order to solve the above-described problems, the present invention provides a three-dimensional insulating base material in which a cylindrical space for a magnet is formed and a housing portion for a capacitor is formed, and a magnetic cylinder for an insulating base material In the cylindrical space for the magnet on the surface of the insulating base material, the magnet embedded in the capacitor housing portion of the insulating base material, and the magnet accommodated in the cylindrical space so as to be slidable or slidable And a circuit board on which the insulating base material is mounted, and a circuit pattern formed on the surface of the insulating base material for conducting the thin film coil, the capacitor, and the circuit board. .

  According to the present invention, since the insulating base material, the capacitor, and the thin film coil are integrated, it is possible to reduce the size and height, reduce the manufacturing cost, and simplify the manufacturing process. be able to.

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

  The present invention is applied to a power generator configured as shown in FIG. 1, for example. FIG. 1 is a side view of the power generation device, and shows a part of the power generation device as a cross section.

  This power generation device includes an insulating substrate 1 made of, for example, a ceramic sintered body. This insulating base material 1 has a cylindrical space 1a for magnets formed therein. The insulating substrate 1 is configured by integrating a capacitor housing portion 1b.

  In the magnet cylindrical space 1a, the magnet 3 is accommodated so as to be able to roll or slide in the longitudinal direction of the insulating substrate 1. The magnet 3 moves in the magnet cylindrical space 1a when vibration is applied to the insulating substrate 1. At the time of manufacture in which the magnet 3 is accommodated in the magnet cylindrical space 1a, the magnet 3 is accommodated in the magnet cylindrical space 1a with the inside of the magnet cylindrical space 1a exposed, and then the magnet 3 is used with a resin or the like. The cylindrical space 1a is closed.

  FIG. 1 shows a case where the magnet 3 on the cube is housed in the magnet cylindrical space 1a and the magnet 3 slides in the magnet cylindrical space 1a. If the S pole and the N pole are in a symmetrical positional relationship, a spherical magnet is accommodated in the magnet cylindrical space 1a and the spherical magnet rolls in the magnet cylindrical space 1a. There may be.

  A capacitor 5 that is charged by being supplied with a generated current is embedded in the capacitor housing portion 1b. The capacitor 5 is fixed with a resin 6 in a state where the capacitor 5 is embedded in the capacitor housing portion of the insulating base 1. The conducting wire of the capacitor 5 is exposed to the surface of the capacitor housing portion 1 b through the resin 6. In this example, the capacitor 5 is provided only at one end in the longitudinal direction of the insulating substrate 1. However, the storage capacity is increased, and the capacitor housing is integrated with the insulating substrate 1 at the other end. Other capacitors may be provided.

  In addition, in this example, although the structure which embedded the capacitor | condenser 5 in the insulating base material 1 was shown, it is not restricted to this, By using the ceramic of a laminated structure as the insulating base material 1, and providing an electrode, the said laminated structure The capacitor 5 may be incorporated by providing a function as a dielectric between these layers. Even with such a configuration, it is not necessary to attach the capacitor 5 externally.

  A thin film coil 2 formed so as to be substantially orthogonal to the longitudinal direction of the magnet cylindrical space 1 a is formed on the surface of the insulating substrate 1. The thin film coil 2 is connected to a circuit pattern 4 for conducting the conductor of the capacitor 5 and the conductor 8 on the circuit board 7. The circuit pattern 4 is formed on the surface of the insulating substrate 1 as a thin film, similarly to the thin film coil 2.

  In the power generation device configured as described above, the thin film coil 2 and the circuit pattern 4 are formed on the insulating base material 1 by a thin film outline removing method, and a three-dimensional circuit board can be easily formed. This thin film outline removing method includes the following processes.

  First, in the thin film outline removing method, a heat treatment process is performed, and a sintered body which is an insulating base material 1 in which a cylindrical space for magnet 1a is provided and a capacitor accommodating portion 1b is formed is set at a temperature of 1000 ° C. Heat treatment is performed under the condition of holding time of 1 hour to clean the surface.

Subsequently, in the thin film outline removing method, a conductive thin film forming process is executed. In this conductive thin film formation process, a conductive thin film is formed on the surface of a specimen by a physical vapor deposition method using a vacuum vapor deposition apparatus, a DC magnetron sputtering apparatus, or a wet method such as electroless plating. Specifically, the test specimen is set in the chamber of the plasma processing apparatus, the pressure in the chamber is reduced to about 10 ⁻⁴ Pa, and then the specimen is preheated at a temperature of 150 ° C. for about 3 minutes. Thereafter, oxygen gas is circulated in the chamber, and the gas pressure in the chamber is controlled to about 10 Pa. Then, plasma treatment is performed by applying a high-frequency voltage of 1 kW (RF: 13.56 MHz) between the electrodes for 300 seconds. Subsequently, the pressure in the chamber is controlled to 10 ⁻⁴ Pa or less, and in this state, argon gas is introduced into the chamber so that the gas pressure is about 0.6 Pa, and then a DC voltage of 500 V is applied. Thus, the metal target is bombarded to form a conductive thin film having a thickness of about 300 nm on the surface of the test body. Note that copper, nickel, chromium, titanium, or the like is used as the conductive material.

  Subsequently, in the thin film contour removal method, a circuit pattern forming process is performed, and the circuit pattern to be the thin film coil 2 and the circuit pattern 4 is formed using the third harmonic of a YAG laser (THG-YAG laser) in the atmosphere. A laser is scanned along the contour to form a thin film removal portion in which only the thin film at the contour portion of the circuit pattern to be the thin film coil 2 and the circuit pattern 4 is removed from the conductive thin film formed on the alumina substrate.

  Subsequently, in the thin film contour removal method, a plating process is executed, and only the electric circuit portion on the surface of the sintered body is subjected to copper plating by electrolytic plating to form a thick film, thereby forming a copper film having a thickness of about 15 μm. Thereafter, the conductive thin film remaining in the non-electric circuit portion is removed by etching. At this time, since the copper plating is formed thicker than the conductive thin film, it remains. Then, nickel plating or gold plating is applied to the electric circuit portion by electroplating. By such a thin film outline removing method, the power generation device can easily form the thin film coil 2 and the circuit pattern 4.

  As described above, according to the power generation device to which the present invention is applied, the insulating base 1, the thin film coil 2, the circuit pattern 4, and the capacitor 5 can be integrated to achieve a reduction in size and height. . In particular, since the capacitor housing portion 1b can be provided on the insulating base material 1 to mount the capacitor 5 three-dimensionally, the mounting area on the circuit board 7 can be reduced. Therefore, for example, an optimal power generation device that supplies power to a wearable device such as a hearing aid can be provided.

  Further, in the state in which the insulating base material 1, the thin film coil 2, the circuit pattern 4 and the capacitor 5 are integrated, the circuit pattern 4 and the conductor portion 8 on the circuit board 7 are simply fixed by soldering, and the power generation device is circuitized. Since it can mount on the board | substrate 7, compared with the case where the member and the capacitor | condenser which incorporated the magnet 3 are mounted separately on a circuit board, mounting cost can be reduced. In addition, the manufacturing process can be simplified.

  The above-described embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and various modifications can be made depending on the design and the like as long as the technical idea according to the present invention is not deviated from this embodiment. Of course, it is possible to change.

It is the figure which looked at the electric power generating apparatus to which this invention is applied from the side, and is a figure which shows a part as a cross section. It is the figure which looked at the conventional electric power generating apparatus from the side, and is a figure which shows a part as a cross section.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Insulating base material 1a Cylindrical space for magnets 1b Capacitor accommodating part 2 Thin film coil 3 Magnet 4 Circuit pattern 5 Capacitor 6 Resin 7 Circuit board 8 Conductor part

Claims (1)

A three-dimensional insulating base material in which a cylindrical space for a magnet is formed and a housing portion for a capacitor is formed;
A magnet housed in a cylindrical space for a magnet of the insulating base material so as to roll or slide;
A capacitor embedded in the capacitor housing portion of the insulating substrate;
A thin film coil formed on the surface of the insulating substrate so as to be substantially orthogonal to the longitudinal direction of the cylindrical space for the magnet;
A circuit board on which the insulating substrate is mounted;
A power generation device comprising: a circuit pattern formed on a surface of the insulating base material and electrically connecting the thin film coil, the capacitor, and the circuit board.

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