JP2014036462A - Energy conversion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an energy conversion device capable of displacing and operating a movable part, and improving energy efficiency.SOLUTION: An energy conversion device 1 includes: an oscillating power generator EH and a rectifier circuit 71. The oscillating power generator EH is configured such that a magnet block 3 and a coil block 4 can be relatively displaced in a specified direction orthogonal to an opposite direction, and that a movable part 12 having the magnet block 3 can be operated from the outside so as to be vibration-damped. The oscillating power generator EH includes: the movable part 12; a support part 14; and an elastic body part 15. The elastic body part 15 has rigidity which is smaller in the specified direction than in a direction orthogonal to the specified direction. At both sides of the movable part 12, a plurality of elastic body parts 15 are respectively disposed side by side. The rectifier circuit 71 is a voltage doubler rectifier circuit in which different capacitor C11 or C12 is charged respectively according as the polarity of an AC voltage to be output from the oscillating power generator EH is positive and negative.

Description

  The present invention relates to an energy conversion device.

  In recent years, energy conversion devices that convert kinetic energy into electrical energy by electromagnetic induction have been proposed as energy conversion devices (for example, Patent Documents 1 and 2).

  Patent Document 1 describes a power generation device 100 configured as shown in FIGS. 16 to 18 as an energy conversion device.

  The power generation device 100 includes a support body 110 provided with a storage portion 110a, and a permanent magnet 120 and a coil spring 130 disposed in the storage portion 110a.

  The support 110 is composed of three printed boards 111 to 113. In the support 110, a storage portion 110 a is formed by a rectangular opening 112 a of a printed board 112 disposed between two printed boards 111 and 113.

  Here, in the power generation device 100, planar coils 114 a and 114 b are formed on the lower surface of the printed circuit board 113. As shown in FIG. 18, the planar coils 114a and 114b are arranged in a checkered pattern when viewed from the lower surface side. Each of the planar coils 114a and 114b is formed in a spiral shape. The planar coils 114a and 114b are formed so that the winding directions are opposite to each other.

  Further, an opening 113a is formed in the printed circuit board 113 in a region corresponding to the central portion of the planar coils 114a and 114b. A magnetic core (core) 115 made of Fe, Co, or the like is embedded in the opening 113a. The magnetic core 115 is formed so as to protrude from the lower surface of the printed circuit board 113, and is disposed in the center of the planar coils 114a and 114b.

  As shown in FIGS. 16 and 17, the permanent magnet 120 is disposed inside the storage portion 110a so as to be movable in the arrow X1 direction (arrow X2 direction). Further, as shown in FIG. 17, the permanent magnet 120 is restricted from moving in the direction of the arrow Y1 (the direction of the arrow Y2). In addition, as shown in FIG. 16, the permanent magnet 120 is formed in a plate shape and is disposed to face the planar coils 114a and 114b with a predetermined interval. The permanent magnet 120 includes a portion (magnetic domain) 120a whose magnetization direction is the arrow Z1 direction and a portion 120b whose magnetization direction is the arrow Z2 direction, and is configured as a multipolar magnet. For this reason, in the vicinity of the printed circuit board 113, a magnetic field represented by magnetic lines indicated by broken lines in FIG. 16 is formed. Further, as shown in FIG. 17, the portions 120a and 120b are arranged in a state of being alternately adjacent (checkered pattern) as viewed in a plan view. Further, as shown in FIG. 16, when the permanent magnet 120 is disposed at the reference position, the portion 120a is disposed in the region corresponding to the planar coil 114a, and the portion 120b is disposed in the region corresponding to the planar coil 114b. Has been placed.

  As shown in FIGS. 16 and 17, the coil spring 130 is disposed between the side surface 112 b of the opening 112 a and the end 120 c of the permanent magnet 120, and the side surface 112 c of the opening 112 a and the end of the permanent magnet 120. 120d. The pair of coil springs 130 has a function of urging the support 110 so that the permanent magnet 120 is disposed at a predetermined reference position in the arrow X1 direction (arrow X2 direction).

  In the power generation apparatus 100, the coil spring 130 that biases the permanent magnet 120 so as to be disposed at a predetermined reference position is provided, so that when the force is applied to the power generation apparatus 100, the permanent magnet 120 is easily supported. The body 110 can be vibrated.

  The power generation apparatus 100 is provided with a circuit unit 116 for controlling and outputting the induced electromotive force generated in the planar coils 114 a and 114 b on the upper surface of the printed circuit board 113.

  When force is applied to the power generation device 100, when the permanent magnet 120 moves in the arrow X1 direction with respect to the support 110, the planar coil 114a generates an induced current in the arrow A direction by electromagnetic induction as shown in FIG. In the planar coil 114b, an induced current in the direction of arrow B is generated by electromagnetic induction as shown in FIG. Therefore, an induced current in the C direction is supplied to the circuit unit 116 as shown in FIG. Further, when the permanent magnet 120 moves in the direction of the arrow X2 with respect to the support 110, the planar coil 114a generates an induced current in the direction of arrow B by electromagnetic induction, and the planar coil 114b generates in the direction of arrow A by electromagnetic induction. An induced current is generated. For this reason, the induced current in the direction opposite to the C direction is supplied to the circuit unit 116.

  Patent Document 2 describes a wireless switch provided with an electromagnetic induction type power generator.

  In Patent Document 2, as shown in FIG. 19, a multipole magnet 202, a multilayer circuit board 206 including a conductor 204 that generates a dielectric current by electromagnetic induction, and a suspension sheet A power generator including a (suspension sheet) 200 is described. The suspension seat 200 is coupled to four flexures 208 to form a spring-massstructure. Note that an arrow 210 in FIG. 19 indicates the vibration direction of the suspension seat 200.

  Patent Document 2 describes the structure shown in FIG. This structure includes a substrate 1202, a proof mass 1208 floated from the substrate 1202 by two suspensions 1210, two suspensions 1210, and a rotary dial ( rotary dial) 1200. This structure also includes a multi-lobed cam 1204 that rotates when the rotary dial 1200 rotates, and a follower 1206 that is pushed by the multi-leaf cam 1204. The follower 1206 is coupled to the proof mass 1208. The suspension 1210 is coupled to the follower 1206 and the proof mass 1208 at the central portion 1212. The suspension 1210 has an end 1214 coupled to the substrate 1202. The multi-leaf cam 1204 displaces the follower 1206 and operates the proof mass 1208 after the displacement. This structure thus allows the proof mass 1208 to be actuated using the rotary dial 1200.

  In the power generation device described in Patent Document 2, for example, a proof mass 1208 and two suspensions 1210 having the structure shown in FIG. 20 are used instead of the suspension seat 200 and the four flexures 208, and a rotary dial 1200, multiple It is conceivable to provide a leaf cam 1204 and a follower 1206.

  Patent Document 2 describes a power management circuit 700 as shown in FIG. The power management circuit 700 includes a diode rectifier 702, a capacitor 704, a DC-DC converter 706, a battery 708, and an electronic load 710.

  Further, in Patent Document 2, as shown in FIG. 22, a graph of the relationship between voltage and time generated after operating the proof mass is described.

JP 2009-11149 A US Patent Application Publication No. 2011/0063057

  In the above-described power generation device 100, the permanent magnet 120 and the planar coils 114a and 114b are arranged to face each other with a gap in the thickness direction of the support 110. Further, the power generation apparatus 100 is biased by the pair of coil springs 130 so that the permanent magnet 120 is disposed at a predetermined reference position in the arrow X1 direction (arrow X2 direction) with respect to the support 110. However, in such a power generation device 100, it is assumed that the intermediate portion of the coil spring 130 can be displaced in the direction of the arrow Z1. For this reason, in the electric power generating apparatus 100, there exists a possibility that the above-mentioned space | interval will fluctuate | deviate due to the vibration of the permanent magnet 120 in the thickness direction, an electric power generation characteristic may become unstable, or electric power generation efficiency may fall. That is, in an energy conversion device such as the power generation device 100, there is a concern that the energy conversion characteristics become unstable or the energy conversion efficiency decreases. Moreover, when the above-mentioned space | interval is narrowed, there exists a possibility that the permanent magnet 120 may contact the planar coils 114a and 114b.

  In addition, it is assumed that the power generation device 100 described above restricts the movement of the permanent magnet 120 in the direction of the arrow Y1 (the direction of the arrow Y2) when the side surface 112b of the opening 112a of the printed circuit board 112 is in contact with the permanent magnet 120. Is done. However, in such a case, it is considered that when the permanent magnet 120 vibrates in the direction of the arrow X1 (the direction of the arrow X2), sliding resistance is generated and power generation efficiency is reduced.

  Moreover, in the electric power generating apparatus described in patent document 2, the proof mass 1208 can be operated using the rotary dial 1200 as mentioned above. However, in the power management circuit 700 described above, the proof mass 1208 of the power generator dampens and vibrates, so that the output voltage attenuates over time, while the voltages at the two diodes D1, D4 or D2, D3 of the diode rectifier 702 are attenuated. Loss (forward voltage drop) occurs. For this reason, in the power management circuit 700 described above, it is conceivable that the input voltage of the DC-DC converter 706 becomes too low.

  The present invention has been made in view of the above reasons, and an object of the present invention is to provide an energy conversion device that can be operated by displacing a movable part and that can improve energy conversion efficiency. It is to provide.

  An energy conversion device according to the present invention includes an electromagnetic induction type vibration power generation device that converts kinetic energy into electric energy by electromagnetic induction generated when a magnet block and a coil block are relatively displaced in a specified direction orthogonal to a facing direction. A rectifier circuit that rectifies an AC voltage output from the vibration power generator, and the vibration power generator operates a movable part including one of the magnet block and the coil block from the outside, and moves the movable part. It is capable of damping vibration, and includes the movable part, a support part, and an elastic body part that connects the movable part and the support part, and the elastic body part is in the prescribed direction. The rigidity is smaller than the rigidity in the direction orthogonal to the prescribed direction, and a plurality of elastic body parts are provided side by side on each side of the movable part in the prescribed direction. Cage, the rectifier circuit is characterized in that the polarity of the AC voltage outputted from the vibration generator device is a voltage doubler rectifier circuit is different capacitor and when the negative when the positive is charged.

  In this energy conversion device, it is preferable that the elastic body portion is a spring.

  In this energy conversion device, the voltage doubler rectifier circuit is preferably a double wave voltage doubler rectifier circuit.

  In this energy conversion device, the voltage doubler rectifier circuit is preferably a Cockcroft-Walton circuit.

  This energy conversion device preferably includes a DC-DC converter that makes the output voltage of the rectifier circuit constant.

  In the energy conversion device of the present invention, the movable part can be operated by being displaced, and the energy conversion efficiency can be improved.

(A) is the circuit diagram of the energy converter of Embodiment 1, (b) is a schematic sectional drawing of the vibration power generator in the energy converter of Embodiment 1, (c) is the principal part outline of the energy converter of Embodiment 1. It is a top view. It is a principal part enlarged view of the vibration electric power generating apparatus in the energy converter of Embodiment 1. 1 is a schematic perspective view of a vibration power generation device in an energy conversion device according to Embodiment 1. FIG. 1 is a schematic exploded perspective view of a vibration power generator in an energy conversion device according to a first embodiment. FIG. 3 is an operation explanatory diagram of the vibration power generation device in the energy conversion device of the first embodiment. It is a wave form diagram of the output voltage of the vibration power generator in the energy converter of Embodiment 1. It is operation | movement explanatory drawing of the energy converter of Embodiment 1. FIG. It is a circuit diagram which shows the other structural example of the rectifier circuit in the energy converter of Embodiment 1. It is a circuit diagram which shows another structural example of the rectifier circuit in the energy converter of Embodiment 1. It is a circuit diagram which shows the other structural example of the energy conversion apparatus of Embodiment 1. (A) is a circuit diagram of the energy conversion device of the second embodiment, (b) is a schematic cross-sectional view of the vibration power generation device in the energy conversion device of the second embodiment, and (c) is an outline of a main part of the energy conversion device of the second embodiment. It is a top view. It is a schematic perspective view of the vibration electric power generating apparatus in the energy converter of Embodiment 2. FIG. 5 is a schematic exploded perspective view of a vibration power generator in the energy conversion device according to the second embodiment. It is explanatory drawing of the structural example of the input mechanism in the energy conversion apparatus of Embodiment 2. FIG. It is operation | movement explanatory drawing of the energy converter of Embodiment 2. FIG. It is sectional drawing which showed the structure of the power generator of a prior art example. It is a top view for demonstrating the structure of the electric power generating apparatus shown in FIG. It is a figure for demonstrating the structure of the electric power generating apparatus shown in FIG. It is a general | schematic disassembled perspective view of the electric power generating apparatus of another prior art example. It is explanatory drawing of the structure for operating a proof mass using the rotary dial of another prior art example. It is a circuit diagram of the power management circuit in another conventional example. It is a graph of the relationship between the voltage which generate | occur | produces after operating the proof mass in another prior art example, and time.

(Embodiment 1)
Below, the energy converter 1 of this embodiment is demonstrated based on FIGS.

  The energy conversion device 1 includes an electromagnetic induction type vibration power generation device EH and a rectifier circuit 71.

  The vibration power generation device EH includes a magnet block 3 including a magnet 2 and a coil block 4 including a coil 4a, and the magnet block 3 and the coil block 4 are disposed to face each other. This vibration power generation device EH converts kinetic energy into electrical energy by electromagnetic induction generated when the magnet block 3 and the coil block 4 are relatively displaced in a specified direction orthogonal to the opposing direction. In the vibration power generator EH according to the present embodiment, the vertical direction in FIG. 1B is the facing direction, and the horizontal direction in FIG.

  The vibration power generation device EH can operate the movable part 12 including the magnet block 3 from the outside to attenuate and vibrate the movable part 12. The vibration power generation apparatus EH includes a movable portion 12, a support portion 14, and an elastic body portion 15 that connects the movable portion 12 and the support portion 14. Thereby, in the vibration power generator EH, the movable portion 12 can vibrate in the specified direction. The elastic body portion 15 has a smaller rigidity in the specified direction than that in a direction orthogonal to the specified direction. Thereby, the energy conversion device 1 can make the vibration direction of the movable part 12 unidirectional in the specified direction.

  The vibration power generation apparatus EH includes the vibration block 11 having the above-described movable portion 12, the support portion 14, and each elastic body portion 15. Here, the vibration block 11 assumes orthogonal coordinates with the center of gravity of the movable part 12 as the origin, determines the positive direction of the x axis along the prescribed direction, and is orthogonal to the prescribed direction in plan view of the vibration block 11. If the positive direction of the y-axis is determined along the direction, and the positive direction of the z-axis orthogonal to the prescribed direction is determined along the thickness direction of the movable part 12, the vibration direction of the movable part 12 is simply set in the positive / negative direction of the x-axis. It becomes possible to make the direction, and vibration components in the positive and negative directions of the y axis and the positive and negative directions of the z axis can be suppressed.

  Accordingly, in the vibration power generation device EH, the vibration direction of the movable portion 12 is unidirectional in the left-right direction, which is the specified direction, as shown in FIG. 1C, and the vertical direction of FIG. Vibration in the thickness direction (a direction orthogonal to the paper surface of FIG. 1C) is suppressed. Therefore, the vibration power generation apparatus EH can suppress the generation of unnecessary vibration components, and can improve the energy conversion efficiency.

  The vibration power generator EH includes a first cap 21 disposed on one surface side in the thickness direction of the vibration block 11 and a second cap 31 disposed on the other surface side in the thickness direction of the vibration block 11. . In the vibration power generator EH, the coil block 4 described above is held in each of the first cap 21 and the second cap 3 1. In addition, the vibration power generator EH includes a first spacer 41 disposed between the first cap 21 and the vibration block 11 and a second spacer 42 disposed between the second cap 31 and the vibration block 11. I have.

  The rectifier circuit 71 rectifies the AC voltage output from the vibration power generator EH. The rectifier circuit 71 is a voltage doubler rectifier circuit in which different capacitors (here, capacitors C11 and C12) are charged when the polarity of the AC voltage output from the vibration power generator EH is positive and negative. The rectifier circuit 71 in the present embodiment is a double-wave voltage doubler rectifier circuit, and charges the capacitor C11 when the polarity of the AC voltage output from the vibration power generator EH is positive by the combination of the diode D11 and the capacitor C11. It becomes possible. Further, in this embodiment, the rectifier circuit 71 can charge the capacitor C12 when the polarity of the AC voltage output from the vibration power generator EH is negative by the combination of the diode D12 and the capacitor C12.

  Next, each component of the energy conversion device 1 will be described in detail.

  The vibration block 11 has a frame shape in plan view of the support portion 14. In the vibration block 11, the movable portion main body 13 is disposed inside the support portion 14. The movable portion main body 13 is disposed away from the inner surface of the support portion 14. The vibration block 11 has elastic body portions 15 disposed on both sides of the movable portion main body 13 in the specified direction. The vibration block 11 has a frame shape in plan view of the movable part main body 13, and the magnet block 3 is disposed inside the movable part main body 13. The magnet block 3 is fixed to the movable part main body 13.

  The inner peripheral shape of the movable part main body 13 is a rectangular shape. The outer peripheral shape of the magnet block 3 is a rectangular shape slightly smaller than the inner peripheral shape of the movable part main body 13. As a method of fixing the magnet block 3 to the movable part main body 13, for example, a method of fixing with an adhesive can be employed. In this case, a bonding portion made of an adhesive is interposed between the outer peripheral surface of the magnet block 3 and the inner surface of the movable portion main body 13. The method of fixing the magnet block 3 to the movable part main body 13 is not limited to this, and for example, a method of fixing by pressing another member into the gap between the magnet block 3 and the movable part main body 13 is adopted. Can do. Moreover, the method of fixing the magnet block 3 to the movable part main body 13 can also employ | adopt the method of fixing with a screw from the outer surface side of the movable part main body 13. FIG.

  The planar view shape of the movable part 12 constituted by the movable part main body 13 and the magnet block 3 is an octagonal shape. The planar view shape of the movable part 12 is not limited to the octagonal shape, and may be a rectangular shape, for example. In the vibration block 11, the outer peripheral shape and the inner peripheral shape of the movable portion main body 13 may be rectangular shapes having different sizes. Moreover, the planar view shape of the movable part 12 is good also as circular shape and a regular polygon shape, for example.

  The magnet block 3 includes a plurality of (for example, four) magnets 2, and the plurality of magnets 2 are arranged side by side in the prescribed direction. That is, the magnet block 3 has a plurality of magnets 2 arranged in an array. The magnet 2 is preferably composed of a permanent magnet. As a material of the permanent magnet, for example, neodymium (NdFeB), samarium cobalt (SmCo), alnico (Al—Ni—Co), ferrite, or the like can be employed.

  The magnet 2 is formed in a strip shape. The magnet 2 is magnetized so that one surface side in the thickness direction is an N pole and the other surface side is an S pole. The permanent magnet constituting the magnet 2 can be formed by, for example, shaping a magnet material by cutting, polishing, etc., and then magnetizing it by a pulse magnetization method or the like.

  The plurality of magnets 2 are arranged such that the width direction of each magnet 2 coincides with the specified direction. In the magnet block 3, a plurality of magnets 2 are arranged so that N poles and S poles are alternately arranged in the prescribed direction on both sides in the thickness direction of the magnet block 3. In short, in the magnet block 3, the magnetization directions of the magnets 2 adjacent to each other in the prescribed direction are reversed. The magnet block 3 has a plurality of magnets 2 arranged in a one-dimensional array. However, the present invention is not limited to this. For example, the magnet block 3 may be arranged in a two-dimensional array.

  The vibration block 11 can form the movable part main body 13, the support part 14, and each elastic body part 15 from the board | substrate 10, for example. The substrate 10 is preferably an insulating substrate having a low attenuation with respect to the lines of magnetic force and having an electrical insulating property. For example, a silicon substrate having a high resistivity can be used. Thereby, in the vibration block 11, the material of the movable part main body 13, the support part 14, and each elastic body part 15 is silicon. Such a vibration block 11 can be manufactured using, for example, a manufacturing technology of MEMS (micro electro mechanical systems). In this case, in the vibration block 11, the movable part main body 13, the support part 14, and each elastic body part 15 can be formed integrally. In short, the vibration block 11 can be configured such that the movable portion main body 13, the support portion 14, and the elastic body portions 15 are integrally formed from a single silicon substrate. As a result, when the vibration power generation apparatus EH is manufactured, when the vibration block 11 is formed, the assembly process of the movable portion main body 13, the support portion 14, and each elastic body portion 15 becomes unnecessary, and the manufacture becomes easy. In addition, when each elastic body portion 15 and the movable portion main body 13 and the support portion 14 are connected by a connecting portion made of an adhesive resin, vibration energy is lost as thermal energy at the connecting portion during vibration. . On the other hand, in the configuration in which the movable body 13, the support 14, and each elastic body 15 are integrally formed from a single silicon substrate, each elastic body 15, the movable body 13, and the support 14. Are integrally formed of silicon, which is a low-damping material, so that energy loss during vibration can be reduced and energy conversion efficiency can be improved. In addition, regarding the material of the substrate 10, it is preferable that the relative permeability is low in that it does not affect the magnetic field lines. For example, the high resistivity silicon substrate preferably has a resistivity of 100 Ωcm or more, and more preferably 1000 Ωcm or more.

  The substrate 10 is not limited to a high resistivity silicon substrate, and for example, a high resistivity SOI (Siliconon Insulator) substrate can be used. The vibration block 11 may be provided with an appropriate insulating film according to the material and resistivity of the substrate 10.

  The elastic body portion 15 is preferably a spring. As a result, the vibration power generation apparatus EH can increase the stored energy per elastic body portion 15, and the vibration power generation apparatus EH can be reduced in size.

  It is preferable that a plurality of (for example, five) elastic body portions 15 are provided side by side on both sides of the movable portion 12 in the prescribed direction. Thereby, the vibration power generator EH can further unidirectionally change the vibration direction of the movable portion 12 as compared with the case where one elastic body portion 15 is provided on each of both sides of the movable portion 12. It becomes possible to further improve the energy conversion efficiency. Furthermore, the vibration power generator EH can reduce the stress applied to each elastic body portion 15 and can improve durability. The number of elastic body portions 15 on both sides of the movable portion 12 is not particularly limited to five.

  The material of the spring constituting the elastic body portion 15 may be silicon or metal which is a semiconductor, but is preferably silicon rather than metal. As a result, the energy conversion device 1 can reduce the loss of kinetic energy due to vibration damping in the elastic body portion 15 as compared with the case where the spring material constituting the elastic body portion 15 is a metal. Therefore, the energy conversion efficiency can be improved.

  The material of the elastic body portion 15 is not limited to silicon, and for example, stainless steel (for example, SUS304), steel, copper, copper alloy (brass, beryllium copper), Ti alloy, Al alloy, or the like can be employed. The material of the elastic body portion 15 is preferably a material having a low logarithmic attenuation rate, for example, a material having a logarithmic attenuation rate of 0.04 or less.

  Further, the vibration power generator EH can improve the durability of the elastic body portion 15 as compared with the case where the elastic body portion 15 is made of metal if the spring material constituting the elastic body portion 15 is silicon. Further, the vibration power generation apparatus EH employs a silicon substrate as the above-described substrate 10 because the material of the spring constituting the elastic body portion 15 is silicon, and each of the substrates 10 utilizes a manufacturing technique such as MEMS. It becomes possible to form each elastic body part 15 which consists of a part of. Thereby, the vibration power generator EH increases the aspect ratio represented by the ratio of the width dimension H1 (see FIG. 1B) to the thickness dimension W1 (see FIG. 1B) in the elastic body portion 15 in the shape of a spring. Is possible. When manufacturing technology such as MEMS is used, the thickness dimension W1 of the spring-shaped elastic body portion 15 can be controlled with high accuracy by performing bulk micromachining of the substrate 10 using lithography technology and etching technology. It becomes possible, and the width dimension H1 of the spring-shaped elastic body portion 15 can be set to the same value as the thickness of the substrate 10. Therefore, the spring-shaped elastic body portion 15 having a large aspect ratio is formed with high dimensional accuracy. It becomes possible. In the vibration power generation device EH shown in FIG. 1, the shape of the elastic body portion 15 is a spiral spring shape, and the thickness W1 of the spring-shaped elastic body portion 15 is 0.4 mm. The width dimension H1 is 1 mm. In this case, the aspect ratio is 2.5. In this example, the rigidity in the x-axis direction is about 2754 N / m, the rigidity in the y-axis direction is about 3267 N / m, and the rigidity in the z-axis direction is about 3146 N / m. That is, the rigidity in the specified direction is smaller than the rigidity in the direction orthogonal to the specified direction. However, in these numerical examples, as shown in FIG. 2, in the spring-shaped elastic body portion 15 itself, the number of folded portions is increased by two, and the interval between adjacent portions is set to W3, x-axis. The length of the entire elastic body portion 15 in the direction is defined as X11, the length of the entire elastic body portion 15 in the y-axis direction is defined as Y11, and W3 = 0.12 mm, X11 = 7 mm, and Y11 = 7 mm. is there. Regarding the measurement of the stiffness, for example, after fixing the support portion 14 with a jig, a micro tensile tester or a combination of a force gauge and a μ meter is used, and the x-axis direction, y The spring constant can be calculated by measuring the displacement when a force in each of the axial direction and the z-axis direction is applied.

  In the vibration power generator EH, when a plurality of elastic body portions 15 are provided side by side on both sides of the movable portion 12 in the prescribed direction, all the materials of the plurality of elastic body portions 15 are made of silicon. It can be. In the vibration block 11, at least one material of the plurality of elastic body portions 15 may be silicon, and the material of the other elastic body portions 15 may be metal.

  The shape of the spring constituting the elastic body portion 15 is preferably, for example, a folded shape. In this case, the shape of the elastic body portion 15 formed in a U shape without a corner in the folded portion in the plan view shape is more than the shape formed in a U shape having a corner in the folded portion in the plan view shape. preferable. The vibration power generation apparatus EH can suppress the occurrence of breakage or cracks due to stress concentration at the folded portion of the elastic body portion 15 by adopting a shape without a corner at the folded portion of the elastic body portion 15. It becomes.

  Further, the zigzag-shaped elastic body portion 15 may have a shape in which the thickness dimension of the folded portion is larger than the thickness dimension of other portions in plan view, and is caused by stress concentration at the folded portion of the elastic body portion 15. It is possible to suppress the occurrence of breakage and cracks.

  Further, the zigzag-shaped elastic body portion 15 may have a shape in which the distance between the folded portions is gradually shortened in plan view.

  Further, the elastic body portion 15 is not limited to a zigzag shape as long as it has a meandering shape in a plan view, and may be, for example, a wave shape (sine wave shape in a plan view).

  Moreover, the shape of the spring which comprises the elastic body part 15 is not restricted to meandering shape, such as a zigzag shape and a wave shape, Other shapes may be sufficient.

  Although the thickness dimension of the movable part main body 13 is set to be the same as the thickness dimension of each elastic body part 15, the thickness is not limited to this, and the thickness of each elastic body part 15 is determined based on the desired mass of the movable part 12. May be larger. Moreover, the thickness dimension of the movable part main body 13 may be smaller than the thickness dimension of each elastic body part 15. In this case, the rigidity of the elastic body portion 15 in the facing direction can be increased.

  By the way, in the vibration power generator EH, when the shape of the spring constituting the elastic body portion 15 in a plan view is a meandering shape, the area of the dead space generated between the movable portion 12 and the support portion 14 in the specified direction. Is preferably smaller. Thereby, the vibration power generator EH can increase the amount of energy stored as strain energy. Therefore, the vibration power generation apparatus EH can reduce the size and the height of the elastic body portion 15 as long as the amount of energy stored as strain energy is the same. In the machining of metal or the like, it is difficult to reduce the size of the elastic body 15 by reducing the thickness W1 of the elastic body 15 to about 200 to 300 μm and the dimension W3 between the folded parts to about 200 to 300 μm. . On the other hand, when the elastic body portion 15 is formed using the micromachining technology, the elastic body portion 15 can be further reduced in size, and the area of the dead space is reduced. It becomes possible. As a design example for reducing the area of the dead space, for example, the thickness W1 of the elastic body 15 may be about 10 μm, and the dimension W3 between the folded portions may be about 10 μm. This can be realized by forming the body part 15.

  Further, in the vibration block 11, the elastic body portion 15 may have a corrugated plate shape (corrugated plate shape) in a side view.

  The first spacer 41 and the second spacer 42 are formed in a frame shape.

  In the vibration power generator EH, the shape of the first spacer 41 and the shape of the second spacer 42 are preferably set to the same shape. As a result, the vibration power generation apparatus EH can achieve cost reduction by sharing parts.

  In addition, the outer dimensions of the first spacer 41 and the second spacer 42 are preferably matched to the outer dimensions of the vibration block 11.

  As each material of the first spacer 41 and the second spacer 42, for example, resin such as engineering plastic (for example, polycarbonate), ceramic, silicon or the like can be adopted. When silicon is employed as the material of each of the first spacer 41 and the second spacer 42, each of the first spacer 41 and the second spacer 42 can be formed from a silicon substrate. Thereby, as a bonding method of each of the first spacer 41 and the second spacer 42 and the support portion 14 of the vibration block 11, for example, a surface activated bonding method, a eutectic bonding method, a resin bonding method, or the like is adopted. can do.

  The outer dimensions of the first cap 21 and the second cap 31 are preferably matched with the outer dimensions of the vibration block 11.

  In the vibration power generator EH, the shape of the first cap 21 and the shape of the second cap 31 are preferably set to the same shape. As a result, the vibration power generation apparatus EH can achieve cost reduction by sharing parts.

  As the material of each of the first cap 21 and the second cap 31, for example, resin such as engineering plastic (for example, polycarbonate), ceramic, silicon, or the like can be employed. When silicon is employed as the material for each of the first cap 21 and the second cap 31, each of the first cap 21 and the second cap 31 can be formed from a silicon substrate. Thereby, as a joining method of the 1st cap 21 and the 2nd cap 31, and each of the 1st spacer 41 and the 2nd spacer 42, for example, a surface activation joining method, a eutectic joining method, a resin joining method, etc. Can be adopted. The vibration power generator EH may be configured such that the first cap 21 and the second cap 31 are fixed to the vibration block 11 without providing the first spacer 41 and the second spacer 42.

  The vibration power generator EH fixes the first cap 21, the first spacer 41, the vibration block 11, the second spacer 42, and the second cap 31 with a plurality of (for example, four) screws (not shown). You may make it, it may make it fix with an adhesive agent, and may use a screw and an adhesive agent together as a fixing member. The vibration power generation apparatus EH includes members adjacent to each other in the thickness direction of the vibration power generation apparatus EH among the members formed of the first cap 21, the first spacer 41, the vibration block 11, the second spacer 42, and the second cap 31, respectively. Further, a structure that can be fitted to each other may be provided and fixed by fitting.

  The vibration power generator EH shown in FIG. 4 has through holes 21a through which fixing screws can be inserted into the four corners of the first cap 21, the first spacer 41, the vibration block 11, the second spacer 42, and the second cap 31, respectively. , 41a, 11a, 42a and 31a are formed. The opening shape of each through hole 21a, 41a, 11a, 42a and 31a in plan view is a circular shape. These opening shapes may be other than circular shapes.

  In addition, the vibration block 11 is integrally provided with two protrusions 13 b that protrude from the movable part main body 13 in a direction orthogonal to the prescribed direction in plan view. Each protrusion 13b is formed in a rectangular shape in plan view. Further, the vibration block 11 is formed with two first cutout portions 14b on the inner surface of the frame-shaped support portion 14 that allow each of the protrusions 13b to be displaced in the specified direction. In the first cap 21 and the second cap 31, rectangular through holes 21b and 31b are formed in the respective projection regions of the first cutout portions 14b. Further, on the inner side surfaces of the first spacer 41 and the second spacer 42, second cutout portions 41b and 42b are formed in the respective projection regions of the respective first cutout portions 14b. Therefore, in the vibration power generator EH according to the present embodiment, the movable portion 12 is defined as described above by applying an external force to the protrusions 13b with an appropriate jig through the through holes 21b and 31b and the second notches 41b and 42b from the outside. It can be displaced in the direction. Thereby, in the vibration power generation device EH, if the jig is pulled out after displacing both protrusions 13b, the movable part 12 vibrates in the specified direction. In short, the vibration power generator EH can be operated by displacing the movable portion 12. The vibration of the movable part 12 in this case is a damped vibration. As a result, the waveform of the output voltage of the vibration power generator EH becomes a waveform that attenuates over time as shown in FIG. 6, for example. As the jig, for example, a bifurcated fork-shaped one can be adopted.

  As shown in FIG. 1C and FIG. 5, the vibration block 11 is provided with a tapered stopper portion 14 c that restricts the amount of displacement of the movable portion 12 in the specified direction on the support portion 14. On the other hand, an inclined surface 12c substantially parallel to the stopper portion 14c is provided on the outer peripheral surface of the movable portion 12 (the outer surface of the movable portion main body 13). The stopper portion 14 c provided on the support portion 14 is inclined with respect to a plane parallel to the prescribed direction on the inner side surface of the support portion 14. An inclined surface 12 c provided on the movable portion 12 is inclined with respect to a surface parallel to the prescribed direction on the outer peripheral surface of the movable portion 12.

  In the vibration power generator EH, when the movable portion 12 is displaced in the specified direction by applying an external force to the both protrusions 13b with an appropriate jig as described above, the inclined surface 12c comes into contact with the stopper portion 14c. The displacement of the movable part 12 is limited. As a result, the vibration power generator EH can set the displacement amount of the movable portion 12 (initial displacement of the movable portion 12) to a substantially constant value when the movable portion 12 is operated. Further, in the vibration power generator EH, it is possible to suppress the displacement of the movable portion 12 in a direction different from the specified direction. As a result, the vibration power generation apparatus EH can suppress the variation in power generation output each time an external force is applied, and a force in a direction other than the prescribed direction acts on the elastic body portion 15 when the external force is applied. Therefore, it is possible to suppress the occurrence of reliability and to improve the reliability. In addition, the arrow in Fig.5 (a) has shown an example of the direction which displaces the movable part 12. FIG. The vibration power generator EH can be displaced in the direction opposite to the arrow in FIG.

  The coil block 4 includes a plurality of (for example, five) coils 4a. The plurality of coils 4a are arranged side by side in the prescribed direction and are blocked by an adhesive. In short, the coil block 4 is configured by a coil array in which the coils 4a are arranged in an array. The magnet block 3 is configured by a magnet array in which the magnets 2 are arranged in an array. The number of coils 4 a in the coil block 4 is preferably one more than the number of magnets 2 in the magnet block 3. In short, if the number of magnets 2 in the magnet block 3 is m (m is a natural number), the number of coils 4a in the coil block 4 is preferably m + 1. Moreover, it is preferable that the pitch of the coil 4a in the coil block 4 and the pitch of the magnet 2 in the magnet block 3 are the same. Moreover, it is preferable that each coil 4a is arrange | positioned so that the boundary of the adjacent magnets 2 and the centerline (mouth axis) of the coil 4a may be on the same plane. . Thereby, the vibration power generator EH can improve the energy conversion efficiency.

  The coil 4a is composed of a coil wire wound around the core material 4b. As the coil wire, a copper wire with an insulation coating can be employed. The coil wire is wound around the core 4b by a winding machine and fixed with an adhesive or the like. As the material of the core material 4b, it is preferable to employ, for example, a resin such as engineering plastic (for example, polycarbonate) or an insulating material such as ceramic. As a material for the insulating film covering the copper wire, for example, urethane, formal, polyester, polyesterimide, polyamideimide and the like can be employed.

  The core material 4b is formed in a strip shape. The core material 4b is disposed so that the thickness direction matches the specified direction, the width direction matches the thickness direction of the vibration block 11, and the longitudinal direction matches the direction orthogonal to the specified direction in plan view. .

  In the coil block 4, each coil 4a is wound around one end portion on the magnet block 3 side in the width direction of each core member 4b so that the surface facing the magnet block 3 is flattened. The coil block 4 held by the first cap 21 is fixed by inserting the other end of each core member 4b in the width direction into each of a plurality of positioning through holes 21c formed in the first cap 21. is there. When assembling the coil block 4 in the first cap 21, for example, in a state where the side facing the magnet block 3 is abutted against the flat surface of a separately prepared dummy member (assembly jig), What is necessary is just to fix each core material 4b to the 1st cap 21, and remove a dummy member after that. Thereby, in the coil block 4, the coil surfaces of the plurality of coils 4a are aligned, and the surface facing the magnet block 3 is substantially flat.

  The coil block 4 held by the second cap 31 is fixed by inserting the other end portion of each core member 4b in the width direction into each of the plurality of positioning through holes 31c formed in the second cap 31. It is. When assembling the coil block 4 in the second cap 31, for example, in a state where the side facing the magnet block 3 is abutted against the flat surface of a separately prepared dummy member (assembly jig), What is necessary is just to fix each core material 4b to the 2nd cap 31, and remove a dummy member after that. Thereby, in the coil block 4, the coil surfaces of the plurality of coils 4a are aligned, and the surface facing the magnet block 3 is substantially flat.

  The adjacent coils 4a in the coil block 4 are joined and electrically connected by a first conductive joining material. As a material of the first conductive bonding material, for example, solder or silver paste can be employed. Here, the adjacent coils 4a are connected in series so as to be in the reverse winding direction. In addition, the first cap 21 and the second cap 31 are electrodes (not shown) to which the wire ends that are not connected to the adjacent coils 4 a in the coils 4 a at both ends of the coil block 4 are electrically connected. ) Is provided. The line end and the electrode are joined and electrically connected by the second conductive joining material. As the material of the second conductive bonding material, for example, solder or silver paste can be employed. A metal screw or the like may be used as the second conductive bonding material.

  In the vibration power generator EH in the present embodiment, each of the coils 4a includes a core material 4b (that is, each of the coils 4a is a so-called cored coil), but does not include the core material 4b. (So-called air-core coil) may be used. In the case where the core material 4b is not provided, for example, ribs for positioning the coils 4a individually may be provided in each of the first cap 21 and the second cap 31. In this case, for example, the rib and the coil 4a may be bonded with an adhesive or the like in a state where the coil 4a is wound around the rib.

  Further, each of the coils 4a may be constituted by a planar coil, for example. In this case, for example, a planar coil may be formed in each of the first cap 21 and the second cap 31.

  As a material of the planar coil, for example, copper, gold, silver or the like can be adopted. Further, as the material of the planar coil, permalloy, cobalt-based amorphous alloy, ferrite, or the like may be employed. The planar coil can be formed by using a thin film forming technique such as a vapor deposition method or a sputtering method, a photolithography technique, an etching technique, or the like.

  The vibration power generation apparatus EH described above includes the magnet block 3 and the coil block 4, and the magnet block 3 and the coil block 4 are disposed to face each other. The vibration power generation apparatus EH includes a movable portion 12 including the magnet block 3, a support portion 14, and an elastic body portion 15 that connects the movable portion 12 and the support portion 14. Further, the elastic body portion 15 has a smaller rigidity in the specified direction than that in a direction orthogonal to the specified direction. Thus, the vibration power generator EH can unidirectionally change the vibration direction of the movable portion 12 in the specified direction orthogonal to the facing direction of the magnet block 3 and the coil block 4, thereby improving the energy conversion efficiency. It becomes possible to plan.

  Further, the vibration power generator EH is provided with a plurality of elastic body portions 15 on both sides of the movable portion 12 in the prescribed direction. Thereby, the vibration power generator EH can further unidirectionally change the vibration direction of the movable portion 12 as compared with the case where one elastic body portion 15 is provided on each of both sides of the movable portion 12. It becomes possible to further improve the energy conversion efficiency.

  In the vibration power generator EH, the coil block 4 is held in each of the first cap 21 and the second cap 3 1. Thereby, the vibration power generator EH can improve the energy conversion efficiency as compared with the case where the coil block 4 is held only in one of the first cap 21 and the second cap 31.

  The vibration power generator EH includes a series circuit of a plurality of coils 4 a in the coil block 4 held by the first cap 21 and a series circuit of a plurality of coils 4 a in the coil block 4 held by the second cap 31. Can be connected in series to increase the output.

  The vibration power generator EH includes a frame-shaped first spacer 41 disposed between the first cap 21 and the vibration block 11. Thereby, the vibration power generation device EH can define the gap length between the coil block 4 of the first cap 21 and the magnet block 3 of the vibration block 11 by the thickness of the first spacer 41. Therefore, the vibration power generation device EH reduces the gap between the coil block 4 of the first cap 21 and the magnet block 3 of the vibration block 11, while reducing the gap between the coil block 4 of the first cap 21 and the vibration block 11. It is possible to prevent contact with the magnet block 3. The vibration power generation device EH can improve the use efficiency of magnetic flux by narrowing the gap between the coil block 4 of the first cap 21 and the magnet block 3 of the vibration block 11, thereby converting energy. Efficiency can be improved.

  The vibration power generator EH includes a frame-shaped second spacer 42 disposed between the second cap 31 and the vibration block 11. As a result, the vibration power generator EH can define the gap length between the coil block 4 of the second cap 31 and the magnet block 3 of the vibration block 11 by the thickness of the second spacer 42. Therefore, the vibration power generator EH reduces the gap between the coil block 4 of the second cap 31 and the magnet block 3 of the vibration block 11, while reducing the gap between the coil block 4 of the second cap 31 and the vibration block 11. It is possible to prevent contact with the magnet block 3. The vibration power generation device EH can improve the use efficiency of magnetic flux by narrowing the gap between the coil block 4 of the second cap 31 and the magnet block 3 of the vibration block 11, thereby converting energy. Efficiency can be improved.

  In the vibration power generator EH, an alternating induced electromotive force is generated by electromagnetic induction generated in accordance with the vibration of the movable portion 12 in the specified direction. In this case, the open circuit voltage of the vibration power generator EH is an AC voltage corresponding to the vibration of the movable part 12. Here, the vibration power generation device EH generates an AC voltage corresponding to the damped vibration because the movable portion 12 oscillates when the jig is pulled out after applying external force to the both protrusions 13b with a jig as described above. To do.

  As shown in FIG. 1A, the rectifier circuit 71 in this embodiment is a double wave voltage rectifier circuit including two diodes D11 and D12 and two capacitors C11 and C12.

  In the double voltage rectifier circuit, a series circuit of two diodes D11 and D12 and a series circuit of two capacitors C11 and C12 are connected in parallel. In short, in the double wave voltage doubler rectifier circuit, two diodes D11 and D12 and two capacitors C11 and C12 are bridge-connected. Here, in the energy conversion device 1, one output end of the vibration power generation device EH is connected to a connection point of both diodes D11 and D12 in a series circuit of two diodes D11 and D12, and the other end of the vibration power generation device EH. The output terminal is connected to the connection point of both capacitors C11 and C12 in a series circuit of two capacitors C11 and C12. If a load (not shown) is connected between both ends of a series circuit of two capacitors C11 and C12, the energy conversion device 1 functions as a power source for the load. As the load, for example, a sensor, an LED (Light Emitting Diode), a wireless circuit, or the like can be used.

  The diode D11 and the diode D12 have the same specifications and have the same characteristics. Each of the diodes D11 and D12 is a silicon diode and has a forward voltage drop of about 0.6 to 0.7V. Each diode D11, D12 may be a Schottky barrier diode, which makes it possible to further reduce the forward voltage drop.

  The capacitors C11 and C12 have the same specifications and have the same characteristics.

  Hereinafter, the circuit operation of the energy conversion device 1 will be briefly described with reference to FIG.

  When the polarity of the output voltage of the vibration power generator EH is positive, a current flows through a path indicated by a broken line in FIG. 7A to charge the capacitor C11. That is, a current flows through the path of the vibration power generator EH → the diode D11 → the capacitor C11 → the vibration power generator EH to charge the capacitor C11.

  When the polarity of the output voltage of the vibration power generator EH is negative, a current flows through a path indicated by a one-dot chain line in FIG. 7B, and the capacitor C12 is charged. That is, current flows through the path of vibration power generator EH → capacitor C12 → diode D12 → vibration power generator EH to charge capacitor C12.

  In short, in the double wave voltage doubler rectifier circuit constituting the rectifier circuit 71, the capacitors C11 and C12 are charged every half cycle of the voltage waveform of the output voltage of the vibration power generator EH. Therefore, the output voltage of the rectifier circuit 71 in the energy conversion device 1 is approximately twice the peak value of the output voltage of the vibration power generator EH.

  Since the energy conversion device 1 includes the double voltage rectifier circuit as the rectifier circuit 71, the output voltage of the rectifier circuit 71 can be increased compared to the case where the diode rectifier 702 as shown in FIG. It becomes possible to plan. In short, the energy conversion device 1 can improve the energy conversion efficiency.

  In the energy conversion device 1 of the present embodiment described above, the movable part 12 can be operated by being displaced, and the energy conversion efficiency can be improved.

The voltage doubler rectifier circuit constituting the rectifier circuit 71 may be, for example, a Cockcroft-Walton circuit as shown in FIG. The Cockcroft-Walton circuit shown in FIG. 8 includes four diodes D _{21 to} D ₂₄ and four capacitors C _{21 to} C _24, and is approximately four times the peak value of the output voltage of the vibration power generator EH. Can be obtained. In FIG. 8, the diode D ₂₁ and the capacitor C _{21 form a} pair, the diode D ₂₂ and the capacitor C _{22 form a} pair, the diode D ₂₃ and the capacitor C _{23 form a} pair, and the diode D ₂₄ and the capacitor C ₂₄ and a pair. In short, in FIG. 8, the subscript numerals of the symbols are the same for each set.

The voltage doubler rectifier circuit constituting the rectifier circuit 71 may be, for example, a Cockcroft-Walton circuit as shown in FIG. The Cockcroft-Walton circuit shown in FIG. 9 includes n (in the illustrated example, n ≧ 6) diodes D _{21 to} D _2n and n capacitors C _{21 to} C _2n . An output voltage approximately n times the peak value of the output voltage can be obtained. In FIG. 9, the subscript numerals of the symbols are the same for each set.

  The energy conversion device 1 can further increase the output voltage by adopting the Cockcroft-Walton circuit as the voltage doubler rectifier circuit, compared to the case where the double wave voltage doubler rectifier circuit is adopted.

  As illustrated in FIG. 10, the energy conversion device 1 may include a DC-DC converter 72 that converts the output voltage of the rectifier circuit 71 to a constant voltage after the rectifier circuit 71. Thereby, the energy conversion device 1 can operate the load more stably. The preceding stage of the DC-DC converter 72 is not limited to the Cockcroft-Walton circuit, but may be a voltage doubler rectifier circuit, or may be a double wave voltage doubler rectifier circuit constituting the rectifier circuit 71 in FIG. .

  The DC / DC converter 72 includes, for example, a step-up DC-DC converter integrated circuit, a step-up inductor, a first capacitor connected between the output terminals of the rectifier circuit 71, and an output terminal and a GND terminal of the integrated circuit. A configuration including a second capacitor or the like connected in between can be employed. As the integrated circuit, for example, MCP1640 / B / C / D manufactured by Microchip Technology, TPS61097-33 manufactured by TEXASINSTRUMENT, or the like can be used.

  The configuration of the DC / DC converter 72 is not particularly limited, and may be, for example, a step-up DC-DC converter including a step-up transformer or a step-up chopper such as the DC-DC converter 706 of FIG.

  Note that the vibration power generation apparatus EH in the present embodiment can also generate power using environmental vibration (external vibration) that matches the resonance frequency of the vibration power generation apparatus EH. Examples of the environmental vibration include various environmental vibrations such as vibrations generated by an operating FA device, vibrations generated by traveling of the vehicle, and vibrations generated by walking of a person. The frequency of the alternating voltage generated by the vibration power generation device EH is the same as the resonance frequency of the vibration power generation device EH when the frequency of the environmental vibration matches the resonance frequency of the energy conversion device 1.

(Embodiment 2)
Below, the energy converter 1 of this embodiment is demonstrated based on FIGS. 11-15. In addition, about the component similar to the energy conversion apparatus 1 of Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted suitably.

  The energy conversion device 1 according to the present embodiment includes an input mechanism 5 for displacing the movable portion 12 along the specified direction. In addition, the energy conversion device 1 of the present embodiment includes a first magnetic material part 7 connected to the movable part 12 and a second magnetic material part 6 connected to the input mechanism 5, and the first magnetic material part 7. The movable portion 12 can be displaced by the magnetic force generated between the second magnetic material portion 6 and the second magnetic material portion 6.

  The first magnetic material portion 7 can be composed of either the first magnet or the first magnetic body. The second magnetic material portion 6 can be composed of either a second magnet or a second magnetic body.

  In the vibration block 11 in the present embodiment, the planar view shape of the support portion 14 is C-shaped. In addition, the movable portion 12 includes one projecting portion 18 that projects from the outer surface of the movable portion main body 13 along the specified direction. The first magnetic material portion 7 described above is connected to the distal end surface of the protruding portion 18. The protrusion 18 and the first magnetic material portion 7 are connected by an adhesive. The shape of the projection 18 in plan view is a rectangular shape with the specified direction as a longitudinal direction. Here, the dimension in the short direction of the projecting portion 18 is set to be slightly smaller than the dimension between both end faces of the support portion 14. The first magnetic material portion 7 has a rectangular shape in plan view.

  Although the 1st magnetic material part 7 is comprised with the 1st magnetic body, you may comprise not only this but a 1st magnet. For example, iron-cobalt alloy, electromagnetic soft iron, electromagnetic stainless steel, permalloy, or the like can be used as the material in the case where the first magnetic material portion 7 is composed of the first magnetic body. Moreover, as a material when the 1st magnetic material part 7 is comprised with a 1st magnet, neodymium, samarium cobalt, alnico, a ferrite, etc. are employable, for example.

  In the vibration block 11, the movable part main body 13, the protruding part 18, the support part 14, and each elastic body part 15 can be formed from the substrate 10, for example. In this case, in the vibration block 11, the movable part main body 13, the protruding part 18, the support part 14, and each elastic body part 15 can be formed integrally. In short, the vibration block 11 can be configured such that the movable portion main body 13, the projecting portion 18, the support portion 14, and each elastic body portion 15 are integrally formed from a single silicon substrate. Thereby, when manufacturing the vibration power generation apparatus EH, when the vibration block 11 is formed, the assembly process of the movable part main body 13, the projecting part 18, the support part 14, and each elastic body part 15 becomes unnecessary, and the manufacture becomes easy. . Further, in the configuration in which the movable portion main body 13, the protruding portion 18, the support portion 14, and each elastic body portion 15 are integrally formed from a single silicon substrate, each elastic body portion 15, the movable portion main body 13, the protruding portion Since 18 and the support portion 14 are integrally formed of silicon, which is a low damping material, energy loss during vibration can be reduced, and energy conversion efficiency can be improved.

  The vibration block 11 is preferably provided with a plurality of elastic body portions 15 side by side on each side of the movable portion 12 in the prescribed direction. Thereby, compared with the case where the energy conversion device 1 is provided with one elastic body portion 15 on each of both sides of the movable portion 12, the vibration direction of the movable portion 12 can be further unidirectional. It becomes possible to further improve the energy conversion efficiency. Furthermore, the energy conversion device 1 can reduce the stress applied to each elastic body portion 15 and can improve the durability. The number of the elastic body portions 15 on both sides of the movable portion 12 is not particularly limited.

  The first spacer 41 and the second spacer 42 are C-shaped in plan view.

  In the vibration power generator EH, the shape of the first spacer 41 and the shape of the second spacer 42 are preferably set to the same shape. Thereby, the energy conversion device 1 can achieve cost reduction by sharing parts.

  In addition, the outer dimensions of the first spacer 41 and the second spacer 42 are preferably matched to the outer dimensions of the vibration block 11.

  The vibration power generator EH may be configured such that the first cap 21 and the second cap 31 are fixed to the vibration block 11 without providing the first spacer 41 and the second spacer 42.

  The vibration power generation apparatus EH described above includes the magnet block 3 and the coil block 4, and the magnet block 3 and the coil block 4 are disposed to face each other. The vibration power generation apparatus EH includes a movable portion 12 including the magnet block 3, a support portion 14, and an elastic body portion 15 that connects the movable portion 12 and the support portion 14. Further, the elastic body portion 15 has a smaller rigidity in the specified direction than that in a direction orthogonal to the specified direction. Thus, the vibration power generator EH can unidirectionally change the vibration direction of the movable portion 12 in the specified direction orthogonal to the facing direction of the magnet block 3 and the coil block 4, thereby improving the energy conversion efficiency. It becomes possible to plan. Further, the vibration power generator EH is provided with a plurality of elastic body portions 15 on both sides of the movable portion 12 in the prescribed direction. Thereby, the vibration power generator EH can further unidirectionally change the vibration direction of the movable portion 12 as compared with the case where one elastic body portion 15 is provided on each of both sides of the movable portion 12. It becomes possible to further improve the energy conversion efficiency.

  In the vibration power generator EH, an alternating induced electromotive force is generated by electromagnetic induction generated in accordance with the vibration of the movable portion 12 in the specified direction. The open circuit voltage of the vibration power generator EH is an AC voltage corresponding to the vibration of the movable part 12. Here, after the energy conversion device 1 displaces the movable part 12 along the specified direction by applying an external force to the input mechanism 5, the second magnetic material part 6 is moved from the first magnetic material part 7. If it moves away, the movable part 12 dampens and vibrates, so that an alternating voltage corresponding to this damped vibration is generated. In short, the vibration power generator EH can be operated by displacing the movable portion 12.

  Incidentally, the energy conversion device 1 includes a mounting substrate 8 on which the vibration power generation device EH is mounted. As the mounting board 8, for example, a circuit board such as a printed wiring board can be adopted. The input mechanism 5 is fixed to the mounting board 8. Thereby, the energy converter 1 can prescribe | regulate the relative positional relationship of the vibration electric power generating apparatus EH and the input mechanism 5. FIG.

  The input mechanism 5 is a cylindrical rotation shaft 51 fixed to the circuit board 8, a rotation portion main body 52 rotatably held by the rotation shaft 51, and a protrusion from the rotation portion main body 52. An operating portion 53 and a protruding portion 54 that protrudes from the rotating portion main body 52 to the opposite side of the operating portion 53 are provided. The operation unit 53 is formed, for example, in a size that allows a user of the energy conversion device 1 to operate with a finger or the like. The operation part 53, the rotation part main body 52, and the protrusion part 54 can be formed with resin, for example. The second magnetic material portion 6 is connected to the distal end surface of the protruding portion 54. The protrusion 54 and the second magnetic material portion 6 are connected by an adhesive. The planar view shape of the second magnetic material portion 6 is a rectangular shape.

  Although the 2nd magnetic material part 6 is comprised by the 2nd magnet, you may comprise not only this but a 2nd magnetic body. For example, neodymium, samarium cobalt, alnico, ferrite, or the like can be used as the material when the second magnetic material portion 6 is formed of the second magnet. Moreover, as a material when the 2nd magnetic material part 6 is comprised with a 2nd magnetic body, iron-cobalt alloy, electromagnetic soft iron, electromagnetic stainless steel, a permalloy etc. are employable, for example.

  The direction of the magnetic force generated between the first magnetic material part 7 and the second magnetic material part 6 is the direction of attraction, but is not limited thereto, and may be a repulsive direction. For example, the 1st magnetic material part 7 is comprised by the 1st magnet, the 2nd magnetic material part 6 is comprised by the 2nd magnet, and the 1st magnet so that the same polarity of a 1st magnet and a 2nd magnet may oppose And the second magnet are arranged, the direction of the magnetic force generated between the first magnetic material part 7 and the second magnetic material part 6 is a repulsive direction.

  In the input mechanism 5, the operation portion 53, the protruding portion 54, and the second magnetic material portion 6 are arranged in a straight line, and a straight line connecting the operating portion 53, the protruding portion 54, and the second magnetic material portion 6 is defined as described above. It arrange | positions so that it may orthogonally cross a direction.

  Here, the input mechanism 5 includes a return spring 55 made of a torsion coil spring, for example, as shown in FIG. The return spring 55 is disposed so as to surround the rotation shaft 51 in the rotation unit main body 52, one end 55 a is fixed to the mounting substrate 8, and the other end 55 b is fixed to the operation unit 53.

  The input mechanism 5 shown in FIG. 14 applies an external force against the spring force of the return spring 55 to the operating portion 53 in the initial position, so that the protruding portion 54 extends from the protruding portion 18 along the specified direction. Displaces away. The input mechanism 5 is configured such that when the external force applied to the operation unit 53 disappears, the operation unit 53 returns to the initial position by the spring force of the return spring 55. The input mechanism 5 is not limited to the configuration shown in FIG. 14 and may have other configurations.

  When the first magnetic material portion 7 is a first magnetic body and the second magnetic material portion 6 is a second magnetic body, the input mechanism 5 is a magnet that can magnetize the second magnetic material portion 6 (hereinafter, referred to as a magnet). (Referred to as magnetizing magnet). The input mechanism 5 generates a magnetic force between the second magnetic material portion 6 and the first magnetic material portion 7 by magnetizing the second magnetic material portion 6 by bringing the magnetizing magnet into contact with the second magnetic material portion 6. The magnetism of the second magnetic material portion 6 is lost by separating the magnetizing magnet from the second magnetic material portion 6 so that the magnetic force between the second magnetic material portion 6 and the first magnetic material portion 7 is lost. do it.

  In the vibration block 11, a stopper portion 14 c is provided on the support portion 14 to limit the amount of displacement of the movable portion 12 in the specified direction to a specified value. The stopper portion 14c has a tapered shape inclined on the inner side surface of the support portion 14 with respect to a plane parallel to the specified direction. On the other hand, an inclined surface 12c substantially parallel to the stopper portion 14c is provided on the outer peripheral surface of the movable portion 12 (the outer surface of the movable portion main body 13). An inclined surface 12 c provided on the movable portion 12 is inclined with respect to a surface parallel to the prescribed direction on the outer peripheral surface of the movable portion 12. In the energy conversion device 1, when the movable portion 12 is displaced in the prescribed direction by applying an external force to the input mechanism 5 described above, the displacement amount of the movable portion 12 becomes a prescribed value by the inclined surface 12c coming into contact with the stopper portion 14c. Therefore, the displacement amount of the movable part 12 can be set to a substantially constant value. Moreover, in the energy converter 1, it becomes possible to suppress the displacement of the movable part 12 in a direction different from the prescribed direction. Accordingly, in the energy conversion device 1, it is possible to prevent the power generation output from varying every time an external force is applied, and when the external force is applied, an excessive force is applied to the elastic body portion 15 in a direction other than the prescribed direction. It is possible to suppress the action, and it is possible to improve the reliability.

  An example of the operation of the energy conversion device 1 will be described with reference to FIG. 15. In FIG. 15, the second magnetic material portion 6 is composed of a second magnet, and the first magnetic material portion 7 is composed of a first magnetic body. This is for explaining an example of the operation.

  As shown in FIG. 15A, the energy conversion device 1 has a first magnetic force generated between the second magnetic material portion 6 and the first magnetic material portion 7 in a state where the operation portion 53 is in the initial position. The first magnetic material portion 7 is adsorbed to the two magnetic material portions 6. When the external force in the direction in which the operation unit 53 approaches the vibration power generation device EH (the direction of the arrow in FIG. 15A) is given to the operation unit 53 in the initial position, the energy conversion device 1 As indicated by the arrow b), the operation portion 53 and the protruding portion 54 rotate counterclockwise. At this time, in the energy conversion device 1, the movable portion 12 moves against the elastic force of the elastic body portion 15 on the right side of FIG. 15B, and the first magnetic material portion 7 is attracted to the second magnetic material portion 6. The maintained state is maintained. In addition, the arrow attached | subjected to the input mechanism 5 in FIG.15 (b) has shown the rotation direction of the input mechanism 5. FIG.

  When the operation portion 53 is further rotated and the spring force of the elastic body portion 15 becomes larger than the magnetic force between the first magnetic material portion 7 and the second magnetic material portion 6 in the energy conversion device 1, FIG. As shown in c), the first magnetic material part 7 is separated from the second magnetic material part 6, and the movable part 12 vibrates along the prescribed direction. This vibration is a damped vibration. In FIG. 15C, the arrow attached to the movable part 12 indicates the vibration direction of the movable part 12, and the arrow attached to the input mechanism 5 indicates the rotation direction of the input mechanism 5.

  Thereafter, when the application of external force to the input mechanism 5 is stopped, the input mechanism 5 returns to the initial position by the spring force of the return spring 55. In addition, the arrow attached | subjected to the input mechanism 5 in FIG.15 (d) has shown the rotation direction of the input mechanism 5. FIG.

  In the energy conversion device 1 of the present embodiment, when the operation unit 53 is rotated from the initial position by a first predetermined angle (for example, 5 °), the movable unit 12 is displaced by the specified value and contacts the stopper unit 14c. When the operation portion 53 is rotated from the initial position by a second predetermined angle (for example, 10 °), the spring force of the elastic body portion 15 is between the first magnetic material portion 7 and the second magnetic material portion 6. The spring force of the elastic body portion 15 is designed so as to be larger than the magnetic force. The first predetermined angle and the second predetermined angle are not particularly limited, but it is preferable to design the second magnetic material portion 6 so as to be displaced on a straight line along the specified direction.

  By the way, in the electric power generating apparatus described in Patent Document 2, as can be understood by referring to FIG. 20, the multi-leaf cam 1204 applies a force to the suspension 1210 in an unnecessary direction, so that the energy conversion efficiency is improved. Is considered difficult.

  Further, in the power generation device described in Patent Document 2, the multi-leaf cam 1204 applies a force to the suspension 1210 in an unnecessary direction, so that an excessive load is applied to the suspension 1210 and the suspension 1210 is structurally broken. It can be caused.

  Furthermore, in the power generation device described in Patent Document 2, a large stress is applied to the tip of each leaf (lobes) of the multi-leaf cam 1204 and the tip of the follower 1206 compared to the other parts. It is conceivable that structural degradation occurs due to wear and power generation performance is reduced.

  On the other hand, the energy conversion device 1 of the present embodiment includes an input mechanism 5 for displacing the movable part 12 along the specified direction, a first magnetic material part 7 connected to the movable part 12, and an input. The second magnetic material portion 6 connected to the mechanism 5 is provided, and the movable portion 12 can be displaced by a magnetic force generated between the first magnetic material portion 7 and the second magnetic material portion 6. Thereby, the energy conversion device 1 can be operated by displacing the movable part 12 by appropriately applying an external force to the input mechanism 5, and a force in a direction different from the prescribed direction is applied to the movable part 12. It becomes possible to suppress the action, and it becomes possible to improve energy conversion efficiency (power generation efficiency) and reliability. In the energy conversion device 1, the input mechanism 5, the second magnetic material portion 6, and the first magnetic material portion 7 constitute an actuator that displaces the movable portion 12.

  In the energy conversion device 1, the first magnetic material portion 7 is made of either the first magnetic body or the first magnet, and the second magnetic material portion 2 is made of either the second magnetic body or the second magnet. The magnetic force generated between the first magnetic material portion 7 and the second magnetic material portion 6 can be set as appropriate.

  Moreover, since the direction of the magnetic force which generate | occur | produces between the 1st magnetic material part 7 and the 2nd magnetic material part 6 is the direction to attract, the energy conversion apparatus 1 compared with the case where the direction of a magnetic force is a repulsive direction. The movable part 12 can be stably displaced along the prescribed direction.

  The voltage doubler rectifier circuit constituting the rectifier circuit 71 is not limited to the double wave voltage doubler rectifier circuit shown in FIG. 11A, and, for example, a Cockcroft-Walton circuit as shown in FIGS. Moreover, it is good also as a structure provided with the DC-DC converter 72 like FIG. Thereby, the energy conversion device 1 can operate the load more stably.

  By the way, in each of the above-described first and second embodiments, the movable portion 12 includes the magnet block 3 and each of the first cap 21 and the second cap 31 includes the coil block 4. 12 may include the coil block 4, and at least one of the first cap 21 and the second cap 31 may include the magnet block 3. The elastic body portion 15 may be formed of rubber or resin.

DESCRIPTION OF SYMBOLS 1 Energy converter 3 Magnet block 4 Coil block 12 Movable part 14 Support part 15 Elastic body part 71 Rectifier circuit 72 DC-DC converter C11 Capacitor C12 Capacitor EH Vibration power generator

Claims (5)

  An electromagnetic induction-type vibration power generation device that converts kinetic energy into electrical energy by electromagnetic induction generated when the magnet block and the coil block are relatively displaced in a specified direction orthogonal to the opposing direction; and is output from the vibration power generation device. A rectifying circuit that rectifies an alternating voltage, and the vibration power generator is capable of operating a movable part having one of the magnet block and the coil block from the outside to attenuate and vibrate the movable part. A movable portion, a support portion, and an elastic body portion connecting the movable portion and the support portion, and the elastic body portion has a rigidity in the prescribed direction orthogonal to the prescribed direction. A plurality of elastic body portions are provided side by side on both sides of the movable portion in the prescribed direction, and the rectifier circuit includes: Energy converting device, wherein the polarity of the AC voltage outputted from the dynamic power generator is a voltage doubler rectifier circuit is different capacitor and when the negative when the positive is charged.   The energy conversion device according to claim 1, wherein the elastic body portion is a spring.   3. The energy conversion device according to claim 1, wherein the voltage doubler rectifier circuit is a double wave voltage doubler rectifier circuit.   3. The energy conversion device according to claim 1, wherein the voltage doubler rectifier circuit is a Cockcroft-Walton circuit.   The energy conversion device according to any one of claims 1 to 4, further comprising a DC-DC converter that converts the output voltage of the rectifier circuit to a constant voltage.

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