JP2012135131A - Power generation apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power generation apparatus which is suitable for the size reduction.SOLUTION: A movable part 24 is disposed along a shaft part 26A so as to be vibrated relative to a fixed part 26 by a plate spring 27, and magnets 23 vibrate in conjunction with the vibrations of the movable part 24 while facing a coil 25. Allowing the magnets 23 to be vibrated facing the coil 25 at the inner wall side thereof suppresses the thickness in a vertical direction, and the plate spring 27 which is thinly disposed is used. Thus, this structure provides a power generation apparatus suitable for the size reduction.

Description

  TECHNICAL FIELD The present invention relates to a power generator used mainly for industrial electronic devices such as watches, hearing aids, mobile phones and personal computers, manufacturing machines, household electronic devices such as refrigerators and washing machines, and electronic devices such as various sensors. Is.

  In recent years, as electronic devices such as watches, hearing aids, mobile phones and personal computers, industrial and household electronic devices, and various sensors have become more diverse and sophisticated, the processing load on control means such as CPUs has increased and has been used. Since the power to be used is increasing and the number of times of charging and the frequency of battery replacement are also increasing, there is a demand for a power generator built in an electronic device.

  Such a conventional power generator and an electronic apparatus using the same will be described with reference to a cross-sectional view of the conventional power generator shown in FIG. In FIG. 1, a power generation device 10 includes a spring 2 and a magnet 3 disposed in a cylindrical housing 1, and a coil 4 wound around the outer periphery of the housing 1. Here, the right end of the spring 2 is fixed to the magnet 3, and the left end is fixed to the side wall of the housing 1, so that the magnet 3 can vibrate left and right in the housing 1.

  The power generation apparatus 10 configured as described above is built in a predetermined position such as the back surface of the liquid crystal display in an electronic device (not shown) such as a mobile phone, and when the mobile phone is vibrated left and right, the magnet 3 vibrates left and right. However, the electronic device is charged by the electromotive force generated in the coil 4 by electromagnetic induction.

  As prior art document information related to the invention of this application, for example, Patent Document 1 is known.

JP 2009-112069 A

  However, although the conventional power generation device has a simple structure, since the power necessary for the operation of the electronic device cannot be generated unless the movable range of the magnet 3 is large, it is arranged on the back surface of the liquid crystal display with approximately the same size as the liquid crystal display. There is a problem that it tends to be large-sized, and is not suitable for being built in an electronic device.

  The present invention solves such a conventional problem, and an object of the present invention is to provide a power generator suitable for downsizing.

  In order to achieve the above object, the present invention has the following configuration.

  The invention according to claim 1 of the present invention includes a shaft portion of the fixed body and a leaf spring connecting the movable body, and the movable body is arranged to be able to vibrate with respect to the fixed body along the shaft portion. Along with the vibration, the magnet vibrates while facing the coil. With such a configuration, the magnet can vibrate while keeping the state facing the coil, and is configured using a leaf spring that can suppress the vertical thickness and can be arranged thinly, and is suitable for downsizing. The power generation device can be provided.

  According to a second aspect of the present invention, in the power generation device according to the first aspect, the coil spring further includes a coil spring that goes around the shaft portion of the fixed body and is sandwiched between the plate spring and the fixed body. Such a load can be reduced, and a power generator having high durability can be provided.

  According to a third aspect of the present invention, in the power generation device according to the first aspect, the rectifier circuit to which the coil wire of the coil is electrically connected, the storage circuit to be electrically connected to the rectifier circuit, and the storage circuit to be electrically connected The battery is further replaced with a battery by further providing a positive electrode cover and a negative electrode cover that are connected to each other, and having an outer shape constituted by the positive electrode cover and the negative electrode cover defined in IEC 60086 or JIS C8500 corresponding to JIS standard in Japan. Therefore, it is possible to provide a power generator suitable for use in electronic equipment.

  As described above, according to the present invention, an advantageous effect that it is possible to provide a power generation device suitable for downsizing can be obtained.

Sectional drawing of the electric power generating apparatus by one embodiment of this invention Exploded perspective view of the power generator Sectional drawing which shows the operating state of the power generator Sectional drawing which shows the operating state of the power generator Conceptual diagram showing the circuit configuration of the power generator Sectional view of a conventional power generator

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

  These drawings are partially enlarged in size for easy understanding of the configuration.

(Embodiment)
FIG. 1 is a sectional view of a power generator according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view thereof.

  Here, the power generation device 40 vibrates the movable body 24 with respect to the fixed body 26, the movable body 24 holding the magnet 23, the fixed body 26 in which the coil 25 is disposed, between the positive electrode cover 21 and the negative electrode cover 22. A plate spring 27 and a coil spring 28 are provided.

  Hereinafter, the configuration of the power generation device 40 will be described in detail.

  The positive electrode cover 21 has a cylindrical box shape with a lower opening, and an annular spacer 29 is inserted so that the upper surface contacts the upper surface of the inner wall of the positive electrode cover 21. Here, the positive electrode cover 21 is a conductive material.

  The leaf spring 27 has an annular shape with a hole 27A provided in the center, and a spring portion 27D formed by meandering between the outer peripheral portion 27B and the inner peripheral portion 27C is connected to the spring portion 27D. Are provided at the front, rear, left and right, and connect the outer peripheral portion 27B and the inner peripheral portion 27C at four locations.

  An annular stopper 30 is in contact with the lower surface of the leaf spring 27, and a coil spring 28 is arranged below the hole 27A so as to be aligned with the center thereof.

  In addition, the movable body 24 includes a U-shaped storage portion 24A having a lower opening in cross section, and a guide portion 24B that slightly protrudes inward from the inner edge of the storage portion 24A. In addition, the storage portion 24A is fixed to the outer peripheral portion 27B of the leaf spring 27 on its upper surface by welding or adhesion.

  A magnet 23 is fixed to the inner side surface of the storage portion 24A by adhesion. Here, the magnet 23 has an S pole on the inner wall side and an N pole on the outer wall side. The magnet 23 faces the coil 25 on the inner wall side. Note that all of the magnets 23 may be stored inside the storage portion 24A, or a part thereof may protrude from the storage portion 24A. That is, it is only necessary that at least a part of the magnet 23 is stored in the storage portion 24A.

  Further, the coil 25 is configured by winding a coil wire 32 such as an enameled wire or a self-bonding wire coated with a polyamide fusion layer, and the fixed body 26 has a cylindrical shaft portion 26A at a substantially center. A flat plate portion 26B is provided on the outer side from the lower edge of the shaft portion 26A. Then, the shaft portion 26A is inserted with the center of the movable body 24 and the coil spring 28 slightly bent, and the upper end of the shaft portion 26A is fixed to the stopper 30 with an adhesive (not shown) or the like. Further, the coil 25 is disposed on the flat plate portion 26B, and both ends of the coil wire 32 are inserted into the shaft portion 26A.

  The leaf spring 27 is slightly bent downward. This is because the coil spring 28 is inserted in a slightly bent state to generate an elastic force, and the movable body to which the magnet 23 is fixed. It is bent by gravity of 24.

  In addition, an electric circuit 36 provided with a rectifier circuit 35 for rectifying a current to the power storage circuit 34 such as a capacitor or a battery connected to the substrate 33 and the upper and lower surfaces of the substrate 33 inside the shaft portion 26A. Is arranged. Further, both ends of the coil wire 32 inserted into the shaft portion 26 </ b> A are connected to the substrate 33 and are electrically connected to the electric circuit 36. Further, a wiring (not shown) extends from the power storage circuit 34 and is electrically connected to the positive electrode cover 21 and the negative electrode cover 22.

  In addition, the negative electrode cover 22 is assembled from below by sandwiching an annular insulating ring 37 between the positive electrode cover 21 and the power generation device 40 so that the positive electrode cover 21 and the negative electrode cover 22 are not short-circuited. ing.

  Here, to supplement the material of each component of the power generation device 40, the positive electrode cover 21 and the negative electrode cover 22 are formed of a conductive material, and, for example, stainless steel is suitable.

  In addition, the fixed body 26 and the ring 37 are made of an insulating material, and are preferably formed of a resin.

  Further, the movable body 24 is made of a magnetically conductive material because the magnetic lines of force of the magnet 23 flow through the movable body 24. For example, iron-based cold rolled steel is suitable.

  The stopper 30 can be made of either insulating or conductive material. However, since the stopper 30 is in contact with the elastic plate spring 27 and the coil spring 28 that expands and contracts, a hard material is preferable. For example, the stopper 30 is made of stainless steel.

  The plate spring 27 can be any material that is generally used as a plate spring, but a stainless steel thin plate, phosphor bronze, or the like is suitable.

  The power generation device 40 configured as described above is configured in a predetermined shape such as a button battery, a coin battery, or a dry battery, and is used for industrial electronic devices such as watches, hearing aids, mobile phones, personal computers, and manufacturing machines, refrigerators, and washing machines. It is replaced with a battery in a home electronic device such as a machine and a predetermined electronic device such as various sensors.

  For example, when the user holding the electronic device walks when used in a mobile phone or the like, an external force is applied to the power generation device 40 according to the movement of the user, and the movable body 24 moves against the fixed body 26. By being vibrated, the electricity is stored in the electricity storage circuit 34. When the electronic device is used, the electricity stored in the storage circuit 34 can be used as operating power through the positive electrode cover 21 and the negative electrode cover 22.

  Such a power storage operation of the power generation apparatus 40 will be described with reference to cross-sectional views showing the operations of FIGS. 1, 3, and 4 and a conceptual diagram showing a circuit configuration of FIG.

  From the state of the cross-sectional view of FIG. 1, when a downward external force acts on the power generation device 40 and a downward acceleration is applied to the power generation device 40, the movable body 24 moves upward and the elasticity stored in the leaf spring 27. While the force is released, the coil spring 28 is further bent to store the elastic force, and the state shown in the cross-sectional view of FIG. 3 is obtained.

  At this time, as shown in FIG. 5A, the coil 25 moves downward (in the direction of the arrow FA) with respect to the magnet 23, so that Fleming's right-hand rule (the direction in which the coil 25 whose thumb is a conductor has moved) is moved. In accordance with the direction of the magnetic field of the index finger and the direction of current of the middle finger), an electromotive force is generated by electromagnetic induction, and a current flows through the coil wire 32.

  Here, when viewed from the cross section of the coil wire 32, the left side is the direction from the front to the back of the paper (X is circled), and the right is the direction from the back to the front of the paper (black dots are circled). ) Is generated, and becomes a clockwise current indicated by an arrow IA. Then, a current flows in the direction of the arrow IB through the rectifier circuit 35 that is a full-wave rectifier circuit, flows into the positive electrode of the power storage circuit 34, and the power storage circuit 34 is charged. Further, the current flowing from the negative electrode of the storage circuit 34 follows the path of the arrow IC and returns to the coil wire 32.

  The positive electrode cover 21 is connected to the positive electrode of the power storage circuit 34, and the negative electrode cover 22 is connected to the negative electrode of the power storage circuit 34. The power charged in the power storage circuit 34 passes through the positive electrode cover 21 and the negative electrode cover 22, The power generator 40 is used as a power source for an electronic device on which the power generator 40 is mounted.

  Then, even if no external force is applied to the power generation device 40 from the state of the cross-sectional view of FIG. 3, the movable body 24 is pushed down by the elastic force of the coil spring 28, beyond the neutral state of the cross-sectional view of FIG. It will be in the state shown in the figure. In the state shown in the figure, the leaf spring 27 is bent downward to store elastic force, and the coil spring 28 is also extended, so that upward elastic force is generated.

  At this time, as shown in FIG. 5 (b), the coil 25 moves upward (in the direction of the arrow FB) with respect to the magnet 23. Therefore, in accordance with Fleming's right-hand rule, A current flows through the coil wire 32 in the direction of the arrow ID. Then, a current flows in the direction of arrow IE through the rectifier circuit 35 serving as a full-wave rectifier circuit, flows into the positive electrode of the power storage circuit 34, and the power storage circuit 34 is charged. The current flowing from the negative electrode of the storage circuit 34 follows the path indicated by the arrow IF and returns to the coil wire 32.

  Then, after the state of the cross-sectional view of FIG. 4, the position of the movable body 24 vibrates up and down around the neutral state of the cross-sectional view of FIG. 1, and the power storage circuit 34 is charged.

  In the above description, the case where the downward external force is applied to the power generation device 40 has been described, but the same applies to the case where the upward external force is applied to the power generation device 40. In this case, the state shown in FIG. Then, the movable body 24 vibrates with respect to the fixed body 26 to the state shown in FIG. 3, and the power storage circuit 34 is charged.

  That is, for example, when an external force is applied to the power generation device 40 due to movement of a user of an electronic device equipped with the power generation device 40, the movable body 24 vibrates with respect to the fixed body 26, and the storage circuit 34 is caused by electromotive force due to electromagnetic induction. Is charged.

  Here, the resonance frequency of the movable body 24 is determined by the movable body 24, the leaf spring 27, the coil spring 28, and the like. When the power generation device 40 is used in an electronic device such as a mobile phone, the resonance frequency is adjusted to the frequency of exercise such as walking of the user (several Hz to several tens Hz), and the home electronic device such as a refrigerator is used. When used for a sensor such as a vibration sensor attached to a device or a bridge, efficient charging is possible by adjusting to the frequency generated by the vibration.

  In the above description, the coil 25 is described as the fixed body 26 and the magnet 23 is disposed on the movable body 24. However, the arrangement of the coil 25 and the magnet 23 is reversed, that is, the coil 25 is disposed on the movable body 24. It is good also as a structure which has arrange | positioned the magnet 23 to the fixed body 26. FIG.

  According to such a configuration, even when there is a magnetic member in the vicinity of the power generation device 40, there is an advantage that the influence of the magnet 23 is reduced because the distance of the magnet 23 is increased, and the power generation device 40 can operate stably.

  In the above description, the coil spring 28 is used. However, the present invention can be implemented even if the coil spring 28 is not provided. However, it is more desirable to use the coil spring 28 because the force applied to the leaf spring 27 is reduced and the durability is improved.

  Further, although the stopper 30 is described as one component in the above description, the stopper 30 may be integrated with the leaf spring 27.

  The coil wire 32 may be configured to be wound around a bobbin made of an insulating resin or the like. In addition, although winding will become easy if a bobbin is used, the direction which does not use a bobbin is suitable for size reduction of the electric power generating apparatus 40. FIG.

  In addition, although the spring portion 27D has been described as being connected to the outer peripheral portion 27B and the inner peripheral portion 27C at four locations, the spring portion 27D is not limited to this and may be connected at least at one location. Further, the shape of the spring portion 27D is not limited to a meandering shape, and various modifications are possible.

  Further, the magnet 23 has been described as having the S pole on the inner wall side and the N pole on the outer wall side, but conversely, the present invention can be implemented even if the outer wall side is the S pole and the inner wall side is the N pole.

  The spacer 29 is described as being provided inside the positive electrode cover 21, but the spacer 29 is not necessarily provided, and a step may be provided on the upper surface of the inner wall of the positive electrode cover 21 to replace the internal spacer 29. It is.

  Furthermore, in order to be able to replace an existing battery, the outer shape constituted by the positive electrode cover 21 and the negative electrode cover 22 is IEC60086, which is a standard for a battery set by the International Electrotechnical Commission, or a corresponding Japanese JIS standard. It shall conform to a certain JISC8500.

  For example, it is formed in accordance with specific symbols such as R41, R43, R44, R48, R54, R55, and R70 which are standards for external dimensions. In addition, even if a unique symbol is not defined, R1632, R2450, R1025, R1216, R1220, R1225, R1616, R2012, R2016, R2025, R2032, R2325, R2330, R2354, R2477, R3032 exist as existing battery dimensions. (The first two digits of the number represent the diameter and the last two digits represent the thickness. For example, 2032 indicates a diameter of 20 mm and a thickness of 3.2 mm).

  In addition, the outer dimensions are cylindrical R03 (corresponding to AA type in Japanese name), R1 (corresponding to AA type in Japanese name), R6 (corresponding to AA type in Japanese name), R14 (corresponding to single 2 type in Japanese name), R20 (corresponding to single 1 type in Japanese name), R123A, R2 or the like, or a rectangular battery shape. .

  As described above, according to the present embodiment, the shaft portion 26A of the fixed body 26 and the leaf spring 27 that connects the movable body 24 are provided, and the movable body 24 can vibrate relative to the fixed body 26 along the shaft portion 26A. The magnet 23 is arranged and vibrates in a state where the magnet 23 faces the coil 25 as the movable body 24 vibrates. With such a configuration, the plate spring 27 that maintains the state facing the coil 25 on the inner wall side of the magnet 23 and suppresses the thickness in the vertical direction by enabling the magnet 23 to vibrate and can be arranged thinly. Since it is configured to be used, it is possible to provide the power generation device 40 suitable for downsizing.

  Furthermore, the load applied to the leaf spring 27 can be reduced by further including a coil spring 28 that goes around the shaft portion 26 </ b> A of the stationary body 26 and is sandwiched between the leaf spring 27 and the stationary body 26. The power generator 40 having high durability can be provided.

  And the rectifier circuit 35 to which the coil wire 32 of the coil 25 is electrically connected, the storage circuit 34 to be electrically connected to the rectifier circuit 35, the positive electrode cover 21 and the negative electrode to be electrically connected to the storage circuit 34 A cover 22 is further provided, and an outer shape constituted by the positive electrode cover 21 and the negative electrode cover 22 is defined in IEC 60086 or JIS C8500 corresponding to JIS standard in Japan, so that the battery can be used in an electronic device. Therefore, it is possible to provide a power generator 40 suitable for the above.

  The power generator according to the present invention has an advantageous effect that it is suitable for downsizing, and is mainly useful for supplying operating power to various electronic devices.

DESCRIPTION OF SYMBOLS 21 Positive electrode cover 22 Negative electrode cover 23 Magnet 24 Movable body 24A Storage part 24B Guide part 25 Coil 26 Fixed body 26A Shaft part 26B Flat plate part 27 Leaf spring 27A Hole 27B Outer peripheral part 27C Inner peripheral part 27D Spring part 28 Coil spring 29 Spacer 30 Stopper 32 Coil wire 33 Substrate 34 Power storage circuit 35 Rectifier circuit 36 Electric circuit 37 Ring 40 Power generation device

Claims (3)

A coil around which a coil wire is wound, a magnet facing the coil, a fixed body having a shaft portion, a movable body having a storage portion and formed of a conductive material, and the shaft portion and the movable body. And one of the coil or the magnet is disposed on the fixed body, and the other is at least partially housed in the housing portion,
The said movable body is arrange | positioned so that it can vibrate with respect to the said fixed body along the said shaft part, and the said magnet vibrates in the state facing the said coil with the vibration of the said movable body. The power generator according to claim 1, further comprising a coil spring that goes around the shaft portion of the fixed body and is sandwiched between the leaf spring and the fixed body. A rectifier circuit to which the coil wire of the coil is electrically connected; a storage circuit that is electrically connected to the rectifier circuit; and a positive electrode cover and a negative electrode cover that are electrically connected to the storage circuit; The power generator according to claim 1, wherein an outer shape constituted by the positive electrode cover and the negative electrode cover is an outer shape defined in IEC 60086 or JIS C8500 corresponding to JIS standard in Japan.

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