ELECTRIC POWER GENERATOR

Abstract

An electric energy generator for a muscle-powered vehicle, comprising a tubular element, includes a movable element configured to move within the tubular element, a first support element configured to movably support the movable element within the tubular element, and a first energy-generating element comprising a coil and a first magnetostrictive part, wherein the first energy-generating element is configured to deform the first magnetostrictive part in accordance with the movement of the movable element relative to the first support element, thereby generating electrical energy in the coil.

Description

This application claims priority to Japanese Patent Application JP 2023-125702 filed on Aug. 1, 2023. The entire disclosure of Japanese Patent Application JP 2023-125702 is hereby incorporated by reference.The present invention relates to an electric power generator. More particularly, the present invention relates to an electric power generator used in a vehicle such as a bicycle and generating electric power by vibration.In the related art, for example, JP 6195255 discloses a vehicle light emitting device having legs, and discloses that a vibration electric power generator is provided to a vehicle electric power generator.Moreover, an embodiment is disclosed in which the electric power obtained by the vibration electric power generator is supplied to a light emitting part such as an LED and used as a vehicle light emitting device.SUMMARY OF THE INVENTIONHowever, in the conventional oscillating electric power generators, the amount of electric power generated is small and is only enough to turn on a light emitting part such as an LED, which poses a problem in practical application.In view of the above problem, an object of the present invention is to provide an electric power generator capable of increasing the amount of generated electric power.An aspect of the present invention that solves the above-described problem is an electric power generator for a muscle-powered vehicle, the muscle-powered vehicle including a tubular member, the electric power generator including: a movable member configured to move in the tubular member; a first support member configured to movably support the movable member in the tubular member; and a first power generating member including a coil and a first magnetostrictive part, the first power generating member configured to deform the first magnetostrictive part according to the movement of the movable member with respect to the first support member, thereby generating electric power in the coil.According to the above configuration, the movable member moves with respect to the first support member in the tubular member due to vibrations generated during travel of the muscle-powered vehicle, the first magnetostrictive part deforms, and electric power can be generated in the coil. As a result, it is possible to generate electric power with a larger amount of electric power than the conventional electric power generator.In the aspect of the present invention, the electric power generator according to (1) may further include a first damper configured to dampingly and movably support the movable member with respect to the first support member.According to the above configuration, it is possible to reciprocate the movable member in the pipe member by the action of the restoring force of the first damper member. As a result, the number of deformations of the first magnetostrictive part increases, and the number of electric power generation in the coil can be increased. Therefore, by increasing the number of electric power generation operations, electric power can be generated in a larger amount.In the aspect of the present invention, the electric power generator according to (1) or (2) may further include a first sliding member configured to slidably support the movable member with respect to the first support member.According to the above configuration, the first sliding member can easily move the movable member inside the pipe member. Since the first magnetostrictive part is deformed by the smooth movement of the movable member, the efficiency of electric power generation in the coil can be improved.According to the aspect of the present invention, the electric power generator according to (1) or (2) may further include: a second support member that is remote from the first support member, the second support member being configured to movably support the movable member in the pipe member between the first support member and the second support member; and a second power generating member including a second magnetostrictive part, the second power generating member being configured to change a magnetic flux of the second magnetostrictive part according to the movement of the movable member with respect to the second support member, thereby generating electric power.According to the above configuration, the movable member moves with respect to the first support member and the second support member in the tubular member due to vibrations generated during traveling of the muscle-powered vehicle, the first magnetostrictive part and the second magnetostrictive part deform, and electric power can be generated in the coil. Therefore, since two magnetostrictive parts are used, a larger amount of electric power can be generated.According to the aspect of the present invention, the electric power generator according to (4) may further include a second damper configured to dampingly and movably support the movable member with respect to the second support member.According to the above configuration, the movable member can be reciprocated in the pipe member by the action of the restoring force of the first damper member and the second damper member. As a result, the number of deformations of the first magnetostrictive part and the second magnetostrictive part increases, and the number of electric power generation in the coil can be increased. Therefore, by increasing the number of electric power generation, electric power can be generated in a larger amount.In the aspect of the present invention, in the electric power generator according to (1), the tube member may include a seat tube, the seat tube is configured to be attached to a seat, and at least one of the movable member, the first support member, and the first force generating member may be disposed in the seat tube.According to the above configuration, the electric energy can be generated in the seat tube by the vibration generated during the travel of the muscle-powered vehicle.In the aspect of the present invention, in the electric power generator according to (1), the pipe member may include a suspension post, the suspension post including a mounting post and a movable post, the mounting post being configured to be attached to a vehicle body frame, the movable post being configured to be expandably slid with respect to the mounting post, and at least one of the movable member, the first support member, and the first power generating member may be disposed in the suspension postAccording to the above configuration, electric power can be generated in the suspension post by the vibration generated during the travel of the muscle-powered vehicle.In the aspect of the present invention, in the electric power generator according to (1), the first power generating element may include a first frame and a first yoke, the first frame is configured to be attached to the first magnetostrictive part, the first frame is formed to include a non-magnetic material, the first yoke includes a first part and a second part, the first yoke is formed to include a magnetic material, the first part is configured to support the first frame and the first magnetostrictive part, the first part is configured to pivot the first frame and the first magnetostrictive part in a first direction, the second part is connected to the first yoke, the first magnetostrictive part and the second part are arranged side by side in a second direction different from the first direction, and the coil may be wound around at least one of the first yoke and the first magnetostrictive part.According to the above configuration, it is possible to suppress an increase in the electric power generator in the first direction as compared with a case where the first yoke is disposed in the first direction in which the first magnetostrictive part and the first frame swing. As a result, since the electric power generator can be easily installed in a narrow space, the convenience of the electric power generator can be improved.In the aspect of the present invention, in the electric power generator according to (8), the first frame may include a first supported part and a first vibrating part, the first supported part is supported by at least one of the movable member and the first supporting member, the first supported part has a first width, the first vibrating part is away from the first supported part, the first vibrating part has a second width, and the second width may be smaller than the first width.With the above-described configuration, electric power can be generated with a large amount of electric power.According to the aspect of the present invention, the first frame of the electric power generator according to (9) may include a curved portion having a folded shape, and the curved portion may be located between the first supported part and the first vibrating part.With the above-described configuration, electric power can be generated with a large amount of electric power.According to the aspect of the present invention, in the electric power generator according to (10), the first magnetostrictive part may be provided between the cam portion and the first vibration part.With the above-described configuration, electric power can be generated with a large amount of electric power.According to the present invention, an effect of increasing the amount of electric power generated can be obtained.BRIEF DESCRIPTION OF THE DRAWINGSFIG. 1 is a side view illustrating a muscle-powered vehicle including an electric power generator according to a first embodiment of the present invention. FIG. 2 is a perspective cross-sectional view illustrating a part of a vehicle body frame of the muscle-powered vehicle including an electric power generator according to the first embodiment of the present invention, and is a view illustrating a configuration example in which the electric power generator is installed in a pipe member. FIG. 3 is a cross-sectional view illustrating a part of a vehicle body frame of a muscle-powered vehicle including an electric power generator according to a second embodiment of the present invention, and is a view illustrating a configuration example in which the electric power generator is installed in a pipe member. FIG. 4 is a perspective view illustrating a configuration of a power generation element including the electric power generator according to the second embodiment of the present invention. FIG. 5 is a cross-sectional view illustrating a part of a vehicle body frame of a muscle-powered vehicle including an electric power generator according to a modification example of the second embodiment of the present invention, and is a view illustrating a configuration example in which the electric power generator is installed in a pipe member. FIG. 6 is a cross-sectional view illustrating a part of the vehicle body frame of the muscle-powered vehicle including the electric power generator according to the modification example of the second embodiment of the present invention, and is a view illustrating a configuration example in which the electric power generator is installed in a pipe member. FIG. 7 is a cross-sectional view illustrating a part of a vehicle body frame of a muscle-powered vehicle including an electric power generator according to a third embodiment of the present invention, and is a view illustrating a configuration example in which the electric power generator is installed in a pipe member. FIG. 8 is a side view illustrating a muscle-powered vehicle including an electric power generator according to a fourth embodiment of the present invention. FIG. 9 is a schematic view illustrating an electric power generator according to a fifth embodiment of the present invention. FIG. 10 is a schematic view illustrating an electric power generator according to a modification example of the fifth embodiment of the present invention.DESCRIPTION OF THE EMBODIMENTSAn electric power generator according to an embodiment of the present invention will be described with reference to the drawings.In the description of the embodiments, components having the same or similar functions will be denoted by the same reference numerals. Moreover, redundant description of these configurations can be omitted. The drawings are schematic or conceptual, and the relationship between the thickness and width of the individual parts, the size relationship between the parts, and the like are not necessarily the same as the actual ones.In the description of the embodiments, ordinal numbers such as "first", "second", and "third" may be used. The ordinal number does not indicate the number of the element described by the ordinal number. An ordinal number may be used to indicate that each of a plurality of elements is a separate element.As directional terms, the terms "longitudinal direction LD", "radial direction RD", and "circumferential direction CD" are used. The longitudinal direction LD corresponds to a direction in which a pipe member constituting the electric power generator extends. The radial direction RD is a direction orthogonal to the longitudinal direction LD. The circumferential direction CD is a direction along the outer periphery of a member constituting the electric power generator in a cross section orthogonal to the longitudinal direction LD.With respect to the longitudinal direction LD, a direction from a second support member toward a first support member is referred to as a +LD direction, and a direction from the first support member toward the second support member is referred to as a -LD direction. In other words, the -LD direction is a direction opposite to the +LD direction.The radial direction RD corresponds to a direction starting from an axis line parallel to the longitudinal direction LD. The axial line is, for example, a line passing through the center of the pipe member and extending in the longitudinal direction LD.The terms "longitudinal direction LD", "radial direction RD", and "circumferential direction CD" are terms used to describe a positional relationship between a plurality of members each constituting the muscle-powered vehicle and the electric power generator, or a shape or structure of each of the plurality of members, and do not define a posture of the muscle-powered vehicle and the electric power generator.As the term for the shape, a "cross-sectional shape" may be used. Unless defined otherwise, the cross-sectional shape means a shape in a cross-section orthogonal to the longitudinal direction LD.The term "connected" refers to a positional relationship between two elements. This positional relationship means not only that two members are directly connected to each other, but also that another member is disposed between the two members. A similar interpretation applies to the terms "provided", "arranged" and "opposite".First EmbodimentMuscle-powered Vehicle 10As illustrated in FIG. 1, the muscle-powered vehicle 10 includes a vehicle body frame 12, a front fork 14, a handlebar 16, a power unit 18, a front wheel 20F, a rear wheel 20R, a front wheel brake 22F, a rear wheel brake 22R, a seat 24, and a seat post 25.The vehicle body frame 12 includes a head pipe 12A, an upper pipe 12B, a down pipe 12C, a seat pipe 12D, a seat stay 12E, and a chain stay 12F. The seat post 25 extending upward from the muscle-powered vehicle 10 is connected to the seat tube 12D. A seat 24 is attached to an upper portion of the seat post 25.The muscle-powered vehicle 10 includes a tubular member. The head pipe 12A, the upper pipe 12B, the down pipe 12C, the seat pipe 12D, the seat stay 12E, and the chain stay 12F are examples of pipe members. The material of such a pipe element is, for example, a metal or a carbon fiber reinforced plastic.The cross-sectional shape of each portion constituting the vehicle body frame 12 is, for example, circular. The cross-sectional shape of each portion constituting the vehicle body frame 12 is not limited to a circular shape, and may be an elliptical shape, a triangular shape having chamfered corners, or the like. The cross-sectional shape of each portion constituting the vehicle body frame 12 may have a three-dimensional shape in which the cross-sectional shape changes along the longitudinal direction LD.The front fork 14 is supported by the head pipe 12A. The front fork 14 is an example of a pipe member.The link 16 is supported by the front fork 14. The link 16 is an example of a pipe member.The front wheel 20F is rotatably supported on the front fork 14. The rear wheel 20R is rotatably supported by the seat stay 12E and the chain stay 12F.The drive unit 18 is composed of a crank, a chain, a front sprocket, a rear sprocket, and the like. The drive unit 18 is configured to transmit the leg power of a driver riding on the muscle-powered vehicle 10 to the rear wheel 20R.The front brake 22F is mounted on the front fork 14. The front brake 22F is configured to apply a braking force to the front wheel 20F.The rear brake 22R is mounted on the seat stay 12E. The rear wheel brake 22R is configured to apply a braking force to the rear wheel 20R.Electric Power Generator 30AAs illustrated in FIG. 2, an electric power generator 30A according to the first embodiment includes a movable member 32, a first support member 34F, and a first power generating member 36F. The electric power generator 30A is used in the muscle-powered vehicle 10.At least one of the movable member 32, the first support member 34F, and the first power generating member 36F is disposed inside the seat tube 12D. In the present embodiment, all of the movable member 32, the first support member 34F, and the first power generating member 36F are disposed inside the seat tube 12D.Further, the electric power generator 30A includes a first damping element 38F.Further, the electric power generator 30A includes a first slide member 40F.Further, the electric power generator 30A includes a second support member 34S and a second power generating member 36S.Further, the electric power generator 30A includes a second damping element 38S.Further, the electric power generator 30A includes a second slide member 40S.Further, the electric power generator 30A includes a charging circuit unit 42.Movable Element 32In the first embodiment, the movable member 32 is configured to move in the seat tube 12D.Note that the movable member 32 may also move in a pipe portion other than the seat pipe 12D. For example, the movable member 32 may be configured to move in the head tube 12A, the top tube 12B, the down tube 12C, the seat tube 12D, the seat stay 12E, the chain stay 12F, the front fork 14, the seat post 25, and the handlebar 16. The movable member 32 is in the form of, for example, a rod extending along the longitudinal direction LD. The movable member 32 is disposed inside the seat tube 12D. The cross-sectional shape of the movable member 32 is, for example, circular. The shape of the movable member 32 is not particularly limited as long as the movable member 32 can move smoothly in the seat tube 12D. The material of the movable member 32 is, for example, stainless steel. The movable member 32 may include a magnetic material. In this case, the movable member 32 preferably has a non-magnetic property as a whole.The movable element 32 includes a first movable magnet 32A and a second movable magnet 32B. Each of the first movable magnet 32A and the second movable magnet 32B is a conventional permanent magnet. The first movable magnet 32A is provided at one end of the movable member 32 in the longitudinal direction LD. The second movable magnet 32B is provided at the other end of the movable member 32 in the longitudinal direction LD. The magnetic pole of the first movable magnet 32A may be an N pole or an S pole as long as a repulsive force against the first support member 34F can be obtained from the first movable magnet 32A. Similarly, the magnetic pole of the second movable magnet 32B may be an N pole or an S pole as long as a repulsive force against the second support member 34S can be obtained from the second movable magnet 32B. In the present embodiment, the magnetic pole of the first movable magnet 32A and the second movable magnet 32B is each an S pole.First support member 34FThe first support member 34F is configured to movably support the movable member 32 within the seat tube 12D.The cross-sectional shape of the first support member 34F is circular, similar to the cross-sectional shape of the seat tube 12D. The first support member 34F is disposed within the seat tube 12D. The first support member 34F is fixed to the seat tube 12D. The first support member 34F is located at one end of the electric power generator 30A in the longitudinal direction LD. In other words, the first support member 34F is located at an end portion of the electric power generator 30A in the +LD direction.The first support member 34F includes a first support magnet 34A. The first support magnet 34A is provided on a surface of the first support member 34F facing the -LD direction. The first support magnet 34A faces the first movable magnet 32A. The magnetic pole of the first support magnet 34A may be an N pole or an S pole as long as a repulsive force against the first movable magnet 32A can be obtained from the first support magnet 34A. In the present embodiment, the magnetic pole of the first support magnet 34A is an S pole.First Power Generating Element 36FThe first power generating element 36F includes a coil 44A and a first magnetostrictive part 46F. The first power generating element 36F is configured to deform the first magnetostrictive part 46F according to the relative movement of the movable member 32 with respect to the first support member 34F. The first power generating element 36F is configured to generate electric power in the coil 44A by deformation of the first magnetostrictive part 46F. Moreover, the first power generating element 36F is configured to generate electric power in the coil 44A by a change in magnetic flux in the first power generating element 36F.Coil 44AThe coil 44A is provided at the inner portion of the seat tube 12D in the radial direction RD. The coil 44A is disposed along the circumferential direction CD of the seat tube 12D. The cross-sectional shape of the coil 44A is annular. The coil 44A has, for example, a structure in which a coil wiring having a plurality of turns is wound around an annular bobbin.First magnetostrictive member 46FThe first magnetostrictive part 46F is provided at the outer portion of the movable member 32 in the radial direction RD. The first magnetostrictive part 46F is provided along the circumferential direction CD of the movable member 32. The cross-sectional shape of the first magnetostrictive part 46F is annular. The first magnetostrictive part 46F is separated from the coil 44A by a clearance.The first magnetostrictive part 46F is formed of a magnetostrictive material. The first magnetostrictive part 46F is formed of, for example, Fe-Ga alloys. The permeability of the first magnetostrictive part 46F changes due to mechanical stress. The magnetization direction of the first magnetostrictive part 46F changes due to mechanical stress.First damping member 38FThe first damper 38F is configured to dampingly support the movable member 32 to be movable with respect to the first support member 34F.The first damper 38F is disposed between the first support member 34F and the movable member 32 in the longitudinal direction LD. The first damper 38F is, for example, a coil spring. In the present embodiment, a first end of the first damping member 38F in the +LD direction is in contact with the first support magnet 34A. A second end of the first damping member 38F in the -LD direction is in contact with the first movable magnet 32A. In the first damper 38F, a restoring force for separating the first movable magnet 32A from the first support member 34F is generated. The type of the first damper 38F is not limited to a coil spring as long as it is possible to generate a restoring force that separates the first movable magnet 32A from the first support member 34F. As the first damping element 38F, for example, a plate spring or the like may be used.First sliding member 40FThe first slide member 40F is configured to slidably support the movable member 32 to be slidable with respect to the first support member 34F.The first sliding member 40F is disposed between the first power generating element 36F and the first support member 34F in the longitudinal direction LD. The first slide member 40F includes a first movable slide member 40FA and a second movable slide member 40FB.First Movable Slide Member 40FAThe first movable slide member 40FA is provided outside the movable member 32 in the radial direction RD. The first movable slide member 40FA is disposed along the circumferential direction CD of the movable member 32. The cross-sectional shape of the first movable slide member 40FA is annular. The first movable slide member 40FA has a curved surface facing the second movable slide member 40FB.Second Movable Slide Member 40FBThe second movable slide member 40RD is provided at the inner portion of the seat tube 12D in the radial direction RD. The second movable slide member 40FB is provided along the circumferential direction CD of the seat tube 12D. The cross-sectional shape of the second movable slide member 40FB is annular. The second movable slide member 40FB has a curved surface opposite to the first movable slide member 40FA.In the example illustrated in FIG. 2, the first movable slide member 40FA and the second movable slide member 40FB are separated from each other in the radial direction RD. The first movable slide member 40FA and the second movable slide member 40FB are configured to slide against each other in a case where the movable member 32 swings in the longitudinal direction LD.In the example illustrated in FIG. 2, the first movable slide member 40FA and the second movable slide member 40FB each have a curved surface. As a modification example, a protruding portion extending in the longitudinal direction LD may be provided on one curved surface of the first movable slide member 40FA and the second movable slide member 40FB, and a recessed portion extending in the longitudinal direction LD may be provided on the other curved surface of the first movable slide member 40FA and the second movable slide member 40FB. In this structure, the first movable slide member 40FA and the second movable slide member 40FB are configured to slide against each other in a state where the protruding portion is disposed in the recessed portion. In other words, the recessed portion and the protruding portion may be referred to as a rail, a groove, and a guide.Second support member 34SThe second support member 34S is disposed away from the first support member 34F. The second support member 34S is configured to support the movable member 32 between the first support member 34F and the second support member 34S to be movable within the seat tube 12D.The cross-sectional shape of the second support member 34S is circular, similar to the cross-sectional shape of the seat tube 12D. The second support member 34S is disposed inside the seat tube 12D. The second support member 34S is disposed on the seat tube 12D. The second support member 34S is located at the other end of the electric power generator 30A in the longitudinal direction LD. In other words, the second support member 34S is disposed at an end portion of the electric power generator 30A in the -LD direction.The second support member 34S includes a second support magnet 34B. The second support magnet 34B is provided on a surface of the second support member 34S facing the +LD direction. The second support magnet 34B faces the second movable magnet 32B. The magnetic pole of the second support magnet 34B may be an N pole or an S pole as long as a repulsive force against the second movable magnet 32B can be obtained from the second support magnet 34B. In the present embodiment, the magnetic pole of the second support magnet 34B is an S pole.Second Power Generation Element 36SThe second power generating element 36S includes a second magnetostrictive part 46S. The second power generating element 36S is configured to change the magnetic flux in the second magnetostrictive part 46S according to the relative movement of the movable member 32 with respect to the second support member 34S. The second power generating element 36S is configured to generate electric power by changing the magnetic flux in the second magnetostrictive part 46S.Second magnetostrictive member 46SThe second magnetostrictive part 46S is provided outside the movable member 32 in the radial direction RD. The second magnetostrictive part 46S is arranged along the circumferential direction CD of the movable part 32. The cross-sectional shape of the second magnetostrictive part 46S is annular. The second magnetostrictive part 46S is disposed adjacent to the first magnetostrictive part 46F in the -LD direction.Second damping member 38SThe second damper 38S is configured to dampingly support the movable member 32 to be movable with respect to the second support member 34S.The second damper 38S is disposed between the second support member 34S and the movable member 32 in the longitudinal direction LD. The second damper 38S is, for example, a coil spring. In the present embodiment, a first end of the second damping member 38S in the -LD direction is in contact with the second support magnet 34B. A second end of the second damping member 38S in the +LD direction is in contact with the second movable magnet 32B. In the second damper 38S, a restoring force for separating the second movable magnet 32B from the second support member 34S is generated. The type of the second damper 38S is not limited to a coil spring as long as it is possible to generate a restoring force that separates the second movable magnet 32B from the second support member 34S. As the second damping element 38S, for example, a disk spring or the like may be used.Second sliding member 40SThe second slide member 40S is configured to slidably support the movable member 32 to be slidable with respect to the second support member 34S.The second sliding member 40S is disposed between the second power generating element 36S and the second support member 34S in the longitudinal direction LD. The second slide member 40S includes a second movable slide member 40SA and a second movable slide member 40SB.The second movable slide member 40RD is provided outside the movable member 32 in the radial direction RD. The second movable slide member 40SA is provided along the circumferential direction CD of the movable member 32. The cross-sectional shape of the second movable slide member 40SA is annular. The second movable slide member 40SA has a curved surface facing the second movable slide member 40SB.The second movable slide member 40RD is provided at the inner portion of the seat tube 12D in the radial direction RD. The second movable slide member 40SB is provided along the circumferential direction CD of the seat tube 12D. The cross-sectional shape of the second movable slide member 40SB is annular. The second movable slide member 40SB has a curved surface opposite to the second movable slide member 40SA.A specific structure of the second movable slide member 40SA is the same as that of the first movable slide member 40FA described above. A specific structure of the second movable slide member 40SB is the same as that of the second movable slide member 40FB described above.Charging Circuit Unit 42The charging circuit unit 42 includes a connector 42A and a wire 42B. The wire 42B is electrically connected to the coil 44A. The connector 42A is configured to be connected to a charging device (not illustrated). The charging circuit unit 42 is disposed in the seat tube 12D, for example. The position where the charging circuit unit 42 is installed is not particularly limited. For example, the charging circuit unit 42 may be disposed on the surface of the first support member 34F in the +LD direction or at a position separated from the first support member 34F.Effect and effectIn the electric power generator 30A having the above-described configuration, the vibrations generated during the travel of the muscle-powered vehicle 10 are transmitted to the seat tube 12D. Inside the seat tube 12D, the movable member 32 moves with respect to the first support member 34F, the magnetic flux changes in the first magnetostrictive part 46F, and electric power can be generated in the coil 44A. As a result, it is possible to generate electric power with a larger amount of electric power than the conventional electric power generator.Further, the movable member 32 can be reciprocated in the seat tube 12D by the action of the restoring force of the first damper member 38F. Even when the muscle-powered vehicle 10 stops, the reciprocating motion of the movable member 32 is repeated by the first damper 38F until a certain time elapses, i.e., until the operation of the movable member 32 is stabilized. As a result, the number of changes in the magnetic flux in the first magnetostrictive part 46F increases, and the number of electric power generation in the coil 44A can be increased. Therefore, by increasing the number of electric power generation, electric power can be generated in a larger amount.Further, in the first slide member 40F, the first movable slide member 40FA and the second movable slide member 40FB slide, and the movable member 32 can be easily moved inside the seat tube 12D. Since the magnetic flux in the first magnetostrictive part 46F changes due to the smooth movement of the movable member 32, the efficiency of electric power generation in the coil 44A can be improved.The movable member 32 moves with respect to the first support member 34F and the second support member 34S inside the seat tube 12D due to vibrations generated during travel of the muscle-powered vehicle 10. As a result, the magnetic flux changes in the first magnetostrictive part 46F and the second magnetostrictive part 46S, and electric power can be generated in the coil 44A. Therefore, since two magnetostrictive parts are used, electric energy can be generated in a larger amount.Moreover, it is possible to reciprocate the movable member 32 in the seat tube 12D by the action of the restoring force of the first damper member 38F and the second damper member 38S. As a result, the number of changes in magnetic flux in the first magnetostrictive part 46F and the second magnetostrictive part 46S increases, and the number of electric power generation in the coil 44A can be increased. Therefore, by increasing the number of electric power generation, electric power can be generated in a larger amount.Second EmbodimentNext, an electric power generator according to a second embodiment will be described with reference to FIG. 3.In FIG. 3, the same elements as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted or simplified.In the description of the first power generation element according to the second embodiment, the terms "first direction D 1", "second direction D 2", and "third direction D 3" are used as directional terms. The first direction D 1 is a direction in which the first magnetostrictive member vibrates. The second direction D 2 is a direction orthogonal to the first direction D 1. The third direction D 3 is a direction orthogonal to the first direction D 1 and the second direction D 2.The first direction D 1 may be a direction parallel to the radial direction RD or a direction inclined with respect to the radial direction RD. The second direction D 2 may be a direction parallel to the radial direction RD or a direction inclined with respect to the radial direction RD. The third direction D 3 may be a direction parallel to the longitudinal direction LD or a direction inclined with respect to the longitudinal direction LD. The terms "first direction D 1", "second direction D 2", and "third direction D 3" are used to describe the positional relationship between a plurality of elements constituting the first power generating element or the shape or structure of each of the plurality of elements, and do not define the posture of the first power generating element.Electric Power Generator 30BAs illustrated in FIG. 3, the electric power generator 30B according to the second embodiment includes the movable member 32, the first support member 34F, and the power generating member 36A. The electric power generator 30B is used in the muscle-powered vehicle 10.Power Generating Element 36AThe power generation element 36A is an example of a first power generation element.As illustrated in FIGS. 3 and 4, the power generating element 36A includes a coil 44B, a first magnetostrictive part 46A, a first frame 48, and a first yoke 50.In the following description, the first magnetostrictive part 46A is aligned with the first yoke 50 in the second direction D 2 crossing the first direction D 1. The first direction D 1 corresponds to a vibration direction in which the first magnetostrictive part 46A vibrates. As illustrated in FIG. 4, the first magnetostrictive part 46A may be disposed with the first yoke 50 in the first direction D 1.The power generating element 36A is configured to deform the first magnetostrictive part 46A according to the relative movement of the movable member 32 with respect to the first support member 34F. The power generating element 36A is configured to generate electric power in the coil 44B by deformation of the first magnetostrictive part 46A.Further, the power generating element 36A includes a weight 56, a first fixed magnet 58, and a second fixed magnet 60.Coil 44BThe coil 44B is different from the coil 44A according to the first embodiment in the location where the coil 44B is installed. The coil 44B is provided at the outer portion of the first magnetostrictive part 46A in the radial direction RD. The coil 44B is provided along the circumferential direction CD of the first magnetostrictive part 46A. The coil 44B may have, for example, a structure in which the coil wiring is wound with multiple turns around the outer periphery of the first magnetostrictive part 46A. The coil 44B is wound around at least one of the first yoke 50 and the first magnetostrictive part 46A. In the present embodiment, the coil 44B is wound around the first magnetostrictive part 46A. The coil 44B is electrically connected to the charging circuit unit 42 via the wire 42B (see FIG. 2 ).As illustrated in FIG. 4, the coil 44B is wound around both the first frame 48 and the first magnetostrictive part 46A. The coil 44B may also be wound only around the first magnetostrictive part 46A. The coil 44B may be wound around the first yoke 50, the first frame 48, or the first magnetostrictive part 46A. The coil 44B includes output wires 44C and 44D. The output wires 44C and 44D are leads extending from the coil 44B. The electric power generated in the coil 44B is supplied to the charging circuit unit 42 via the output wires 44C and 44D.First magnetostrictive member 46AThe first magnetostrictive part 46A is attached to the first frame 48.For example, the first magnetostrictive member 46A is provided at the outer portion of the first frame 48 in the radial direction RD. The first magnetostrictive part 46A is provided along the circumferential direction CD of the first frame 48. The first magnetostrictive part 46A is formed of a magnetostrictive material, similarly to the first magnetostrictive part 46F according to the first embodiment. The permeability of the first magnetostrictive part 46A changes by mechanical load. The magnetization direction of the first magnetostrictive part 46A changes due to mechanical stress.As illustrated in FIG. 4, the first magnetostrictive part 46A has a shape of a plate extending in the third direction D 3. The direction of the plate thickness of the first magnetostrictive part 46A is the first direction D 1. As viewed from the first direction D 1, the first magnetostrictive part 46A has a substantially rectangular shape. The first magnetostrictive part 46A is attached to the first frame 48. As viewed from the second direction D 2, the first magnetostrictive part 46A overlaps the first yoke 50. The first magnetostrictive part 46A is made of, for example, Fe-Ga alloys. The permeability of the first magnetostrictive part 46A changes by mechanical load. The magnetization direction of the first magnetostrictive part 46A changes under mechanical load.First frame 48The first frame 48 is formed to include a non-magnetic material. In the present embodiment, the first frame 48 is formed of a non-magnetic material. In the present embodiment, the entire first frame 48 is formed of a non-magnetic material. For example, the first frame 48 is formed of stainless steel. Note that the first frame 48 may include a magnetic material. In this case, the first frame 48 preferably has a non-magnetic property as a whole.The first frame 48 is disposed within the seat tube 12D. The first frame 48 is a plate-shaped member extending along the longitudinal direction LD. The cross-sectional shape of the movable member 32 is, for example, a rectangle. The first frame 48 may be formed of a single plate-shaped member or may be formed of a laminated body in which a plurality of plate-shaped members are laminated.As illustrated in FIG. 4, the first magnetostrictive part 46A is attached to the first frame 48. The first magnetostrictive part 46A is a member different from the first frame 48. The first magnetostrictive part 46A may be attached to the first frame 48 by welding or the like.The first frame 48 has a shape of a plate extending in a direction orthogonal to the first direction D 1. In the first direction D 1, the first frame 48 is fixed to the first yoke 50.In the present embodiment, the entire first frame 48 is formed of a non-magnetic material, but the first frame 48 may be formed of a non-magnetic material at least in part.The first frame 48 includes a first supported part 48K and a first swing part 48Y.The first supported part 48K is configured to support one of the movable member 32 and the first support member 34F. In the present embodiment, the first supported part 48K supports the first support member 34F. The first supported part 48K has a first width W 1 in the radial direction RD.The first vibrating part 48Y is provided adjacent to the first supported part 48K. The first vibration member 48Y has a second width W 2 in the radial direction RD. The second width W 2 is smaller than the first width W 1.Further, the first frame 48 includes a base portion 48A, a base protrusion 48B, a swing portion 48C, and a swing protrusion 48D. The base portion 48A includes the first supported part 48K. The base protrusion 48B is a portion protruding from the base portion 48A in the radial direction RD. In other words, the base portion 48A and the base protrusion 48B form a substantially L-shaped portion. The vibrating portion 48C includes the first vibrating member 48Y. The vibration protrusion 48D is a portion protruding from the vibration portion 48C in the radial direction RD. In other words, the vibrating portion 48C and the vibrating protrusion 48D form a substantially L-shaped portion.First yoke 50The first yoke 50 is formed to contain a magnetic material.As illustrated in FIG. 4, the first yoke 50 swingably supports the first frame 48. The first yoke 50 has a structure in which a plurality of yoke plates 50P are stacked in the first direction D 1. Each of the plurality of yoke plates 50P includes a first part 50A and a second part 50B.The first part 50A is configured to support the first frame 48 so as to be swingable in the first direction together with the first magnetostrictive part 46A. The second part 50B is connected to the first part 50A. The second part 50B is arranged side by side with the first magnetostrictive part 46A in a second direction different from the first direction.Each of the plurality of yoke plates 50P is at least partially formed of magnetic materials. In the present embodiment, each of the plurality of yoke plates 50P is formed of magnetic materials. In the present embodiment, the entire first yoke 50 is formed of a magnetic material. The material of each of the plurality of yoke plates 50P is not particularly limited, and each of the plurality of yoke plates 50P is formed of soft magnetic steel, for example. Each of the plurality of yokes 50P may be made of, for example, SS 400, a soft magnetic steel. The first yoke 50 may include both a magnetic material and a non-magnetic material.In each of the plurality of yoke plates 50P, the first part 50A has a substantially rectangular parallelepiped shape extending in the second direction D 2. The second part 50B has a substantially rectangular parallelepiped shape extending in the third direction D 3. The second part 50B faces the first magnetostrictive part 46A and the coil 44B at a distance in the second direction D 2. The second part 50B is arranged side by side with the first magnetostrictive part 46A in the second direction D 2.In the present embodiment, in each of the plurality of yoke plates 50P, the first part 50A is integrally formed with the second part 50B. The first portion 50A forms a one-piece, unitary member with the second portion 50B.In the example illustrated in FIG. 4, the first yoke 50 has a configuration in which the plurality of yoke plates 50P are stacked. In other words, each of the plurality of yoke plates 50P may be separated from each other. The structure of the first yoke 50 is not limited to the structure illustrated in FIG. 4. The first yoke 50 may also be formed of a one-piece member.Magnetic flux forming member 49As illustrated in FIG. 4, the magnetic flux forming member 49 is fixed to the second part 50B. The magnetic flux forming member 49 is disposed adjacent to the first magnetostrictive part 46A and the second part 50B in the second direction D 2. The magnetic flux forming member 49 is disposed between the first yoke 50 and the first magnetostrictive part 46A in the second direction D 2. The magnetic flux forming member 49 faces the first magnetostrictive part 46A in the second direction D 2 with a clearance therebetween. The magnetic flux forming member 49 has a pair of magnetic poles. The magnetic flux forming member 49 is, for example, a permanent magnet. An N pole is formed on a surface of the magnetic flux forming member 49 facing the third direction D 3. On the other surface of the magnetic flux forming member 49 facing the third direction D 3, an S pole is formed. The magnetic flux forming member 49 forms the magnetic flux flowing through the first magnetostrictive part 46A.Weight 56The weight 56 is provided on the first swing part 48Y of the first frame 48. The weight of the weight 56 is adjusted according to the vibration amount by which the first frame 48 vibrates in the radial direction RD. The distance between the weight 56 and the first support member 34F in the longitudinal direction LD is adjusted according to the vibration amount by which the first frame 48 vibrates in the radial direction RD.First fixed magnet 58 and second fixed magnet 60Each of the first fixed magnet 58 and the second fixed magnet 60 is a conventional permanent magnet.The first fixed magnet 58 and the second fixed magnet 60 are separated from each other in the longitudinal direction LD. The first fixed magnet 58 is located on the +LD direction side of the first magnetostrictive part 46A. The second fixed magnet 60 is located on the side in the -LD direction of the first magnetostrictive part 46A.The first fixed magnet 58 has an N-pole portion and an S-pole portion. The N pole portion of the first fixed magnet 58 is provided on the side wall of the seat tube 12D. The S pole portion of the first fixed magnet 58 faces the base protrusion 48B with a clearance therebetween.The second fixed magnet 60 has an N-pole portion and an S-pole portion. The S pole portion of the second fixed magnet 60 is provided on the side wall of the seat tube 12D. The N pole portion of the second fixed magnet 60 faces the swing protrusion 48D with a clearance therebetween.The first magnetostrictive part 46A, the first fixed magnet 58, and the second fixed magnet 60 form a magnetic circuit, i.e., a closed magnetic circuit 64.Effect and effectIn the electric power generator 30B having the above-described configuration, the vibrations generated during the travel of the muscle-powered vehicle 10 are transmitted to the seat tube 12D. Inside the seat tube 12D, the first vibrating part 48Y of the first frame 48 vibrates in the radial direction RD in a state where the first supported part 48K of the first frame 48 is fixed to the first support member 34F. As a result, the first magnetostrictive part 46A deforms, and the magnetic flux in the closed magnetic circuit 64 changes. Therefore, electric energy can be generated in the coil 44B. As a result, it is possible to generate electric power with a larger amount of electric power than the conventional electric power generator.Further, according to the above configuration, it is possible to suppress an increase in the size of the electric power generator 30B. Since the electric power generator 30B can be easily installed in a narrow space, the convenience of the electric power generator 30B can be improved.In addition, since the second width W 2 of the first vibrating part 48Y is smaller than the first width W 1 of the first supported part 48K, the first vibrating part 48Y vibrates more easily. Since the weight 56 is provided on the first vibrating part 48Y, the vibration of the first vibrating part 48Y is further promoted. In this way, the amount of electric power generated can be increased.The first fixed magnet 58 and the second fixed magnet 60 are provided not on the first frame 48 but on the side wall of the seat tube 12D. Therefore, the vibration of the first frame 48 is not transmitted to the first fixed magnet 58 and the second fixed magnet 60. That is, the first fixed magnet 58 and the second fixed magnet 60 can be separated from the first frame 48 with respect to the transmission of vibration. Therefore, the first fixed magnet 58 and the second fixed magnet 60 are less likely to be worn out, and the durability of the first fixed magnet 58 and the second fixed magnet 60 can be improved. Therefore, the closed magnetic circuit 64 can be stably formed.Example of Modification of Second EmbodimentNext, an electric power generator according to a modification example of the second embodiment will be described with reference to FIGS. 5 and 6.In FIGS. 5 and 6, the same elements as in the second embodiment are denoted by the same reference numerals, and the description thereof will be omitted or simplified. The present modification example is different from the second embodiment in that a plurality of the first fixed magnets 58 and a plurality of the second fixed magnets 60 are disposed in the seat tube 12D.FIG. 6 is a cross-sectional view of the seat tube 12D as viewed in the -LD direction. In FIG. 6, reference numeral 44R indicates the outer shape of the coil 44B. Since the second fixed magnet 60 is disposed to overlap the first fixed magnet 58 in FIG. 6, the illustration of the second fixed magnet 60 is omitted, and only the reference numeral 60 is illustrated. Further, illustration of the first magnetostrictive part 46A disposed inside the coil 44B is omitted.In the example illustrated in FIG. 6, four first fixed magnets 58 and four second fixed magnets 60 are provided on the inner surface of the seat tube 12D at equal angular intervals in the circumferential direction CD. The base protrusion 48B corresponds to the position of the first fixed magnet 58.The S pole portion of each of the four first fixed magnets 58 faces the base protrusion 48B with a clearance. The N pole portion of each of the four second fixed magnets 60 faces the vibrating protrusion 48D with a clearance therebetween.In the structure illustrated in FIGS. 5 and 6, four closed magnetic circuits 64 are formed. By increasing the number of closed magnetic circuits 64, a large amount of electric energy can be generated.In the example illustrated in FIG. 6, four first fixed magnets 58 are provided on the side wall of the seat tube 12D at an angular interval of 90°, but the angular interval is not limited to 90°, and also the number of the first fixed magnets 58 is not limited.Third EmbodimentNext, an electric power generator according to a third embodiment will be described with reference to FIG. 7.In FIG. 7, the same elements as those in the second embodiment are denoted by the same reference numerals, and description thereof will be omitted or simplified.Electric Power Generator 30CAs illustrated in FIG. 7, the electric power generator 30C according to the third embodiment includes the movable member 32, the first support member 34F, the second support member 34S, and the power generating member 36B. The electric power generator 30C is used in the muscle-powered vehicle 10.Power Generating Element 36BThe power generation element 36B is an example of a first power generation element. The power generating element 36B includes the coil 44B, the first magnetostrictive part 46A, the first frame 48, and the first yoke 50. the power generating element 36B is configured to deform the first magnetostrictive part 46A according to the relative movement of the movable member 32 with respect to the first support member 34F. The power generating element 36B is configured to generate electric power in the coil 44B by deformation of the first magnetostrictive part 46A.Further, the power generating element 36B includes the weight 56, the first fixed magnet 58, and the second fixed magnet 60.The first fixed magnet 58 and the second fixed magnet 60 are separated from each other in the longitudinal direction LD. The first fixed magnet 58 is located on the +LD direction side of the first magnetostrictive part 46A. The first fixed magnet 58 is provided at the inner portion of the first support member 34F. The second fixed magnet 60 is located on the side in the -LD direction of the first magnetostrictive part 46A. The second fixed magnet 60 is provided at the inner portion of the second support member 34S.The first fixed magnet 58 has an N-pole portion and an S-pole portion. The S pole portion of the first fixed magnet 58 is located on the first supported part 48K of the first frame 48.The second fixed magnet 60 has an N-pole portion and an S-pole portion. The N pole portion of the second fixed magnet 60 faces the weight 56 with a clearance therebetween.The first magnetostrictive part 46A, the first fixed magnet 58, and the second fixed magnet 60 form a magnetic circuit, i.e., a closed magnetic circuit 64.Effect and effectIn the electric power generator 30C having the above-described configuration, the same or similar effects as those of the electric power generator 30B can be obtained. Further, the second fixed magnet 60 is provided not on the first frame 48 but on the second support member 34S. Therefore, the vibration of the first frame 48 is not transmitted to the second fixed magnet 60. That is, with respect to the transmission of vibration, the second fixed magnet 60 may be separated from the first frame 48. Therefore, the second fixed magnet 60 is less susceptible to wear, and the durability of each of the second fixed magnets 60 can be improved. Therefore, the closed magnetic circuit 64 can be stably formed.The angle of each of the first fixed magnet 58 and the second fixed magnet 60 with respect to the longitudinal direction LD and the angle of each of the first fixed magnet 58 and the second fixed magnet 60 with respect to the radial direction RD, respectively, may be changed as needed. By changing the angle of the magnets, the closed magnetic circuit 64 can be adjusted.For example, the arrangement of the first fixed magnet 58 may be adjusted so that the N-pole portion and the S-pole portion of the first fixed magnet 58 face in the radial direction RD. Similarly, the arrangement of the second fixed magnet 60 may be adjusted so that the N pole portion and the S pole portion of the second fixed magnet 60 are aligned in the radial direction RD.The number of the first fixed magnets 58 in the first support member 34F is not limited to one. A plurality of first fixed magnets 58 may be provided on the first support member 34F. Similarly, the number of the second fixed magnets 60 in the second support member 34S is not limited to one. A plurality of second fixed magnets 60 may be provided on the second support member 34S.Fourth EmbodimentNext, an electric power generator according to a fourth embodiment will be described with reference to FIG. 8.In FIG. 8, the same elements as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted or simplified.Muscle-powered vehicle BThe muscle-powered vehicle B illustrated in FIG. 8 is a so-called mountain bike. In the muscle-powered vehicle B, the vehicle body frame 12 includes a rear frame RB, a front frame FB, and a rear suspension RS. The rear suspension RS couples the rear frame RB and the front frame FB to be able to absorb the vibration generated in the vehicle B. The front fork 14 includes a front suspension FS.Further, the vehicle body frame 12 includes a mounting post 12G, a suspension post 12H, and a dirt pad 12J.The mounting post 12G may be attached to the frame of the vehicle body 12. The suspension post 12H includes a movable post 12I that slides in an expandable manner with respect to the mounting post 12G. At least one of the movable member 32, the first support member 34F, and the first power generating member 36F is disposed in the suspension post 12H.The dirt pad 12J is provided on the mounting post 12G. The mud flap 12J is disposed above the rear wheel 20R with a clearance therebetween and extends from the mounting post 12G toward the rear of the muscle-powered vehicle B.According to the above configuration, electric power can be generated in the suspension post 12H by the vibrations generated during the travel of the muscle-powered vehicle 10.When the muscle-powered vehicle 10 travels with muscle power, the mud flap 12J vibrates. The vibration of the dirt pad 12J is transmitted to the movable member 32. Therefore, the mud flap 12J vibrates due to the vibration generated during the travel of the muscle-powered vehicle 10, so that electric power can be generated in the suspension post 12H.At the distal end of the dirt pad 12J at the rear part of the muscle-powered vehicle 10, a weight that does not interfere with the travel of the muscle-powered vehicle 10 may be disposed. By disposing such a weight, the amplitude of the vibration of the mud flap 12J can be increased. Therefore, more effective electric power generation can be achieved.Although the mud flap 12J is provided on the mounting post 12G in the present embodiment, the mud flap 12J may be attached to the suspension post 12H.In the present embodiment, the disposed bumper 12J is illustrated above the rear wheel 20R, but the electric power can be generated by utilizing the vibration of the disposed bumper above the front wheel 20F.Modification Example of Fourth EmbodimentAt least one of the movable member 32, the first support member 34F, and the first power generating member 36F is disposed in the rear suspension RS. According to this configuration, electric power can be generated in the rear suspension RS by vibration generated during travel of the muscle-powered vehicle 10.Similarly, at least one of the movable member 32, the first support member 34F, and the first power generating member 36F may be disposed in the front suspension FS. According to this configuration, electric power can be generated in the front suspension FS by vibration generated during travel of the muscle-powered vehicle 10.Fifth EmbodimentNext, an electric power generator according to a fifth embodiment will be described with reference to FIG. 9.In FIG. 9, the same elements as in the above-described embodiment are denoted by the same reference numerals, and the description thereof will be omitted or simplified. Specifically, the structure of the first magnetostrictive part 46A and the first frame 48 will be described, and other elements constituting the electric power generator will be omitted from the drawings.As illustrated in FIG. 9, the first frame 48 includes a first extension portion 48E and a second extension portion 48F. The first extension portion 48E faces the second extension portion 48F in the first direction D 1. Further, the first frame 48 has a folded-back curved portion 54. The cam portion 54 is provided between the first supported part 48K and the first vibrating part 48Y.In other words, in the direction from the first supported part 48K toward the first swing part 48Y, the first supported part 48K, the first extension portion 48E, the cam portion 54, the second extension portion 48F, and the first swing part 48Y are provided in this order in the first frame 48.The first magnetostrictive member 46A is disposed between the cam portion 54 and the first vibrating member 48Y.As described in the second embodiment, the first supported part 48K further has the first width W 1. In the second direction D 2, the first vibrating part 48Y has the second width W 2. The second width W 2 is smaller than the first width W 1.Since the cam portion 54 is formed in the first frame 48, it is possible to increase the vibration of the first vibration member 48Y. Therefore, it is possible to generate a large amount of electric power.Modification Example of Fifth EmbodimentNext, an electric power generator according to a modification example of the fifth embodiment will be described with reference to FIG. 10.In FIG. 10, the same elements as in the fifth embodiment described above are denoted by the same reference numerals, and description thereof will be omitted or simplified.As illustrated in FIG. 10, the first extension portion 48E faces the second extension portion 48F in the second direction D 2. The first frame 48 has the folded-back curve portion 54. The cam portion 54 is provided between the first supported part 48K and the first vibrating part 48Y.The first magnetostrictive member 46A is disposed between the cam portion 54 and the first vibrating member 48Y.As described in the second embodiment, the first supported part 48K further has the first width W 1. In the first direction D 1, the first vibrating part 48Y has the second width W 2. The second width W 2 is smaller than the first width W 1.According to the modification example, it is possible to increase the vibration of the first vibration member 48Y because the cam portion 54 is formed in the first frame 48. Therefore, it is possible to generate a large amount of electric power.In the above description, the structure of the electric power generator 30A arranged in the seat tube 12D has been described as an example of a tube member. The electric power generator 30A may be disposed within at least one of the head pipe 12A, the upper pipe 12B, the down pipe 12C, the seat stay 12E, the chain stay 12F, the front fork 14, and the handlebar 16.Further, the electric power generator may be disposed in the drive unit 18. In particular, the electric power generator may be arranged inside a tubular member forming a bottom bracket supporting the rotation shaft of the crank. Further, the electric power generator may be disposed in a tubular member of a hub that supports a rotation shaft (wheel shaft) of the front wheel 20F or the rear wheel 20R.LIST OF REFERENCE CHARACTERS10, B muscle-powered vehicle, 12 vehicle body frame, 12A head pipe, 12B upper pipe, 12C down pipe, 12D seat pipe, 12E seat stay, 12F chain stay, 12G mounting posts, 12H suspension posts, 12I movable post, 12J mud cap, 14 front fork, 16 handlebar, 18 drive unit, 20F front wheel, 20R rear wheel, 22F front wheel brake, 22R rear wheel brake, 24 saddle, 30A, 30B, 30C electric power generator, 32 movable member, 32A first movable magnet, 32B second movable magnet, 34A first support magnet, 34B second support magnet, 34F first support member, 34S Second support member, 36A, 36B Power generation member, 36F First power generation member, 36S Second power generation member, 38F First damping member, 38S Second damping member, 40F First sliding member, 40FA First movable sliding member, 40FB Second movable sliding member, 40S Second sliding member, 40SA Second movable sliding member, 40SB Second movable sliding member, 42 Charging circuit unit, 42A Connector, 42B Wire, 44A, 44B Coil, 46A First magnetostrictive member, 46F First magnetostrictive member, 46S Second magnetostrictive member, 48 First frame, 48A Base member, 48B Base protrusion, 48C Vibrating portion, 48D Vibration protrusion, 48E First extension portion, 48F Second extension portion, 48K First supported member, 48Y First vibration member, 50 First yoke, 50A First member, 50B Second member, 50P Yoke plate, 54 Cam portion, 56 Weight, 58 First fixed magnet, 60 Second fixed magnet, 64 Closed magnetic circuit, FB Front frame, FS Front suspension, RB Rear frame, RS Rear suspensionReferences included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedJP 2023-125702

[0001] JP 6195255

[0003]

Claims

An electric power generator (30A) for a muscle-powered vehicle (10), the muscle-powered vehicle (10) including a tubular member (12), the electric power generator (30A) comprising: a movable member (32) configured to move within the tubular member (12); a first support member (34F) configured to movably support the movable member (32) within the tubular member (12); and a first power generating element (36F) including a coil (44A) and a first magnetostrictive part (46F), wherein the first power generating element (36F) is configured to deform the first magnetostrictive part (46F) according to the movement of the movable element (32) with respect to the first support member (34F), thereby generating electric power in the coil (44A).The electric power generator (30A) according to claim 1, further comprising a first damping member (38F) configured to dampingly and movably support the movable member (32) with respect to the first support member (34F).The electric power generator (30A) according to claim 1 or claim 2, further comprising a first slide member (40F) configured to slidably support the movable member (32) with respect to the first support member (34F).The electric power generator (30A) according to claim 1 or claim 2, further comprising: a second support member (34S) that is remote from the first support member (34F), the second support member (34S) being configured to movably support the movable member (32) in the pipe member (12) between the first support member (34F) and the second support member (34S); and a second power generating member (36S) that includes a second magnetostrictive part (46S), the second power generating member (36S) being configured to change a magnetic flux of the second magnetostrictive part (46S) according to the movement of the movable member (32) with respect to the second support member (34S), thereby generating electric power.The electric power generator (30A) according to claim 4, further comprising a second damper (38S) configured to dampingly and movably support the movable member (32) with respect to the second support member (34S).The electric power generator (30A) according to claim 1, wherein the tube member (12) includes a seat tube (12D), the seat tube (12D) is configured to be attached to a saddle (24), and at least one of the movable member (32), the first support member (34F), and the first force generating member (36F) is disposed in the seat tube (12D).The electric power generator (30A) according to claim 1, wherein the pipe member (12) includes a suspension post (12H), the suspension post (12H) includes a mounting post (12G) and a movable post (12I), the mounting post (12G) is configured to be mounted on a vehicle body frame, the movable post (12I) is configured to be expandably slid with respect to the mounting post (12G), and at least one of the movable member (32), the first support member (34F), and the first power generating member (36F) is disposed in the suspension post (12H).The electric power generator (30A) according to claim 1, wherein the first power generating element (36F) includes a first frame (48) and a first yoke (50), the first frame (48) is configured to be attached to the first magnetostrictive part (46F), the first frame (48) is formed to include a non-magnetic material, the first yoke (50) includes a first part (50A) and a second part (50B), the first yoke (50) is formed to include a magnetic material, the first part (50A) is configured to support the first frame (48) and the first magnetostrictive part (46F), the first part (50A) is configured to support the first frame (48) and the first magnetostrictive part (46F), In order to swing the first frame (48) and the first magnetostrictive part (46F) in a first direction, the second part (50B) is connected to the first yoke (50), the first magnetostrictive part (46F) and the second part (50B) are arranged side by side in a second direction different from the first direction, and the coil (44A) is wound around at least one of the first yoke (50) and the first magnetostrictive part (46F).The electric power generator (30A) according to claim 8, wherein the first frame (48) includes a first supported part (48K) and a first vibrating part (48Y), the first supported part (48K) is supported by at least one of the movable member (32) and the first supporting member (34F), the first supported part (48K) has a first width (W1), the first vibrating part (48Y) is away from the first supported part (48K), the first vibrating part (48Y) has a second width (W2), and the second width (W2) is smaller than the first width (W1).The electric power generator (30A) according to claim 9, wherein the first frame (48) has a curved portion (54) having a folded shape, and the curved portion (54) is located between the first supported part (48K) and the first vibrating part (48Y).The electric power generator (30A) according to claim 10, wherein the first magnetostrictive part (46F) is provided between the cam portion (54) and the first vibrating part (48Y).

Images