Components for human-powered vehicles

Abstract

To provide a component for a human-powered vehicle that is able to improve the degree of freedom in the arrangement of a magnetic sensor.SOLUTION: A component for a human-powered vehicle includes: at least one yoke disposed to be movable relative to at least one magnet; and at least one magnetic sensor configured to detect magnetism of the at least one magnet via the at least one yoke.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to components for human-powered vehicles. [Background technology]

[0002] For example, a component for a human-powered vehicle disclosed in Patent Document 1 includes a magnetic sensor that detects the rotation state of a crankshaft. The magnetic sensor detects the magnetism of a magnet provided on a rotating body that rotates in conjunction with the crankshaft. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-231234 Summary of the Invention [Problem to be solved by the invention]

[0004] In the component for a human-powered vehicle disclosed in Patent Document 1, the magnetic sensor needs to be placed in close proximity to the magnet.

[0005] One of the objects of the present disclosure is to provide a component for a human-powered vehicle that allows for increased freedom in the placement of a magnetic sensor. [Means for solving the problem]

[0006] A component according to a first aspect of the present disclosure is a component for a human-powered vehicle, and includes at least one yoke arranged to be movable relative to at least one magnet, and at least one magnetic sensor configured to detect the magnetic field of the at least one magnet via the at least one yoke. According to the component of the first aspect, the magnetic sensor detects the magnetism of the magnet via the yoke, so the magnetic sensor can be placed at a location away from the magnet, thereby improving the degree of freedom in placing the magnetic sensor.

[0007] In the component of the second aspect according to the first aspect of the present disclosure, the at least one magnet is provided on a rotating body that can rotate around a predetermined axis, and at least a portion of the at least one yoke is arranged in a region between the at least one magnet and the at least one magnetic sensor in the direction in which the predetermined axis extends. According to the component of the second aspect, the magnetic sensor can be disposed at a position spaced apart from the magnet in the direction in which the predetermined axis extends.

[0008] A component according to a third aspect of the present disclosure is a component for a human-powered vehicle, comprising: at least one yoke arranged to be movable relative to at least one magnet provided on a rotating body rotatable around a predetermined axis; and at least one magnetic sensor configured to detect the magnetic field of the at least one magnet, wherein at least a portion of the at least one yoke is arranged in a region between the at least one magnet and the at least one magnetic sensor in the direction in which the predetermined axis extends. According to the component of the third aspect, the magnetic sensor can be disposed at a position separated from the magnet in the direction in which the predetermined axis extends, thereby improving the degree of freedom in arranging the magnetic sensor.

[0009] In the component of the fourth aspect according to the second or third aspect of the present disclosure, the at least one magnet includes a plurality of magnets, the plurality of magnets being equally spaced around the predetermined axis. According to the component of the fourth aspect, the magnetic sensor can detect magnetism from a plurality of magnets arranged at equal intervals around a predetermined axis, thereby improving the detection accuracy of the magnetic sensor.

[0010] In the component of the fifth aspect according to any one of the second to fourth aspects of the present disclosure, the at least one yoke includes a plurality of yokes, and the plurality of yokes are arranged side by side on an imaginary circle centered on the predetermined axis. According to the component of the fifth aspect, the magnetic sensor can detect magnetism via a plurality of yokes arranged side by side on an imaginary circle centered on a predetermined axis, thereby improving the detection accuracy of the magnetic sensor.

[0011] The component of the sixth aspect according to any one of the second to fifth aspects of the present disclosure further comprises the rotating body, the rotating body constituting a rotor of a motor. According to the component of the sixth aspect, the magnetic sensor is capable of detecting the position of the rotor relative to the magnetic sensor.

[0012] In the component of the seventh aspect according to the sixth aspect of the present disclosure, the motor is a three-phase motor, the at least one magnetic sensor includes three magnetic sensors, and the at least one yoke includes three yokes. According to the component of the seventh aspect, the three magnetic sensors can detect magnetism via the three yokes, and therefore the three magnetic sensors can suitably detect the magnetic field related to a three-phase motor.

[0013] The component of the eighth aspect according to the sixth or seventh aspect of the present disclosure further comprises a circuit board on which at least a part of a control unit that controls the motor is provided, and the at least one magnetic sensor is provided on the circuit board. According to the component of the eighth aspect, the magnetic sensor can also be provided on the circuit board on which the control unit is provided, which contributes to reducing the number of parts.

[0014] In the component of the ninth aspect according to the eighth aspect of the present disclosure, at least a part of the control unit includes an inverter circuit. According to the component of the ninth aspect, the magnetic sensor can also be provided on the circuit board on which the inverter circuit is provided.

[0015] The component of the tenth aspect according to the ninth aspect of the present disclosure further comprises a wireless unit provided on the circuit board and performing at least one of transmitting a wireless signal and receiving a wireless signal. According to the component of the tenth aspect, the magnetic sensor can also be provided on the circuit board on which the wireless unit is provided.

[0016] In the component of aspect 11 according to any one of aspects 8 to 10 of the present disclosure, the at least one magnetic sensor is electrically connected to the control unit, and the control unit is configured to control the motor according to an output of the at least one magnetic sensor. According to the component of the eleventh aspect, it is possible to improve the degree of freedom in arranging the magnetic sensor for acquiring information for controlling the motor.

[0017] In the component of the twelfth aspect according to any one of the sixth to eleventh aspects of the present disclosure, the motor is configured to provide propulsive force to the human-powered vehicle. According to the component of the twelfth aspect, it is possible to improve the degree of freedom in arranging the magnetic sensor for acquiring information for controlling the motor that provides propulsive force to the human-powered vehicle.

[0018] The component of the thirteenth aspect according to any one of the sixth to twelfth aspects of the present disclosure, further comprising a positioning member that positions the at least one yoke relative to the rotor and the at least one magnetic sensor. According to the component of the thirteenth aspect, the positioning member positions the yoke relative to the magnetic sensor, so that the yoke can be placed at a suitable position relative to the magnetic sensor.

[0019] The component of the fourteenth aspect according to the thirteenth aspect of the present disclosure further includes a cover member having a hole formed therein through which the rotation shaft of the rotor passes, and the positioning member is provided on the cover member. According to the component of the fourteenth aspect, the positioning member is provided on the cover member, which contributes to reducing the number of parts.

[0020] The component of the fifteenth aspect according to the fourteenth aspect of the present disclosure further includes a fastener member that detachably fastens the positioning member to the cover member. According to the component of the fifteenth aspect, the fastener member allows the positioning member to be removed from and attached to the cover member, improving the ease of assembly of the component.

[0021] In the component of the sixteenth aspect according to the fourteenth aspect of the present disclosure, the positioning member is non-detachably fixed to the cover member. According to the component of the sixteenth aspect, the positioning member is fixed undetachably to the cover member, so that misalignment of the yoke with respect to the magnetic sensor is suppressed.

[0022] In the component of the seventeenth aspect according to the fourteenth aspect of the present disclosure, the positioning member is integrally formed with the cover member. According to the component of the seventeenth aspect, the positioning member is formed integrally with the cover member, which contributes to reducing the number of parts.

[0023] In a component of an 18th aspect according to any one of the 14th to 17th aspects of the present disclosure, the component further includes a housing having an internal space in which the motor is disposed, the rotor is disposed in the internal space of the housing, and the cover member partitions the internal space into a first space in which the rotor is disposed and a second space in which the at least one magnetic sensor is disposed. According to the component of the 18th aspect, the cover member separates the first space in which the rotor is placed from the second space in which the magnetic sensor is placed, making it less likely that the magnetic sensor will come into contact with the rotor and protecting the magnetic sensor.

[0024] In the component of the nineteenth aspect according to the thirteenth aspect of the present disclosure, the motor includes a stator, and the positioning member is provided on the stator. According to the component of the nineteenth aspect, since the positioning member is provided on the stator, the position of the yoke relative to the stator is unlikely to shift.

[0025] In the component of the twentieth aspect according to any one of the thirteenth to nineteenth aspects of the present disclosure, the at least one yoke is press-fit into the positioning member. According to the component of the twentieth aspect, the yoke is press-fitted into the positioning member, so that the yoke is less likely to shift relative to the positioning member.

[0026] In the component of the twenty-first aspect according to any one of the thirteenth to twentieth aspects of the present disclosure, the at least one yoke is bonded to the positioning member. According to the component of the twenty-first aspect, the yoke is bonded to the positioning member, so that the yoke can be easily attached to the positioning member.

[0027] In the component of the twenty-second aspect according to any one of the thirteenth to nineteenth aspects of the present disclosure, the at least one yoke is insert molded into the positioning member. According to the component of the twenty-second aspect, the yoke is insert-molded into the positioning member, thereby improving the ease of assembly of the component.

[0028] In a component of aspect 23 according to any one of aspects 2 to 22 of the present disclosure, the at least one yoke includes a first opposing surface facing the at least one magnetic sensor and a second opposing surface facing the rotating body. According to the component of the twenty-third aspect, the magnetic field of at least one magnet is induced from the second opposing surface to the first opposing surface, so that the magnetic sensor can suitably detect the magnetic field of the magnet.

[0029] In the component of the twenty-fourth aspect according to the twenty-third aspect of the present disclosure, the first opposing surface is larger than the second opposing surface. According to the component of the twenty-fourth aspect, the first opposing surface is larger than the second opposing surface, so that the magnetic sensor can be disposed at a position where it can preferably face the yoke. [Effects of the Invention]

[0030] The components for human-powered vehicles of the present disclosure can improve the degree of freedom in arranging magnetic sensors. [Brief explanation of the drawings]

[0031] [Figure 1] FIG. 2 is a perspective view of a component for the human-powered vehicle of the first embodiment. [Figure 2] FIG. 2 is a first side view of a component for the human-powered vehicle of FIG. 1. [Figure 3] FIG. 2 is a second side view of the component for the human-powered vehicle of FIG. 1. [Figure 4] FIG. 4 is a cross-sectional view taken along line D4-D4 in FIG. 2. [Figure 5] FIG. 5 is a cross-sectional view taken along line D5-D5 in FIG. [Figure 6] FIG. 5 is a cross-sectional view of the motor housing, motor, and yoke of FIG. 4. [Figure 7] 5 is a cross-sectional view showing the positional relationship between the circuit board, the magnetic sensor, the yoke, the positioning member, the fastener member, the cover member, and the motor shown in FIG. 4. [Figure 8] FIG. 5 is a perspective view of the yoke of FIG. 4. [Figure 9] FIG. 2 is a block diagram showing the electrical configuration of components for the human-powered vehicle of FIG. 1. [Figure 10] 10 is a cross-sectional view showing the positional relationship between a circuit board, a magnetic sensor, a yoke, a positioning member, a fastener member, a cover member, and a motor according to a second embodiment. FIG. [Figure 11] 10 is a cross-sectional view showing the positional relationship between a circuit board, a magnetic sensor, a yoke, a positioning member, a fastener member, a cover member, and a motor according to a third embodiment. FIG. [Figure 12] 10 is a cross-sectional view showing the positional relationship between a circuit board, a magnetic sensor, a yoke, a positioning member, a fastener member, a cover member, and a motor of a first modified example. FIG. [Figure 13] FIG. 10 is a perspective view of a yoke according to a second modification. DETAILED DESCRIPTION OF THE INVENTION

[0032] First Embodiment A component 10 for a human-powered vehicle according to a first embodiment will be described with reference to FIGS. 1 to 9 . Hereinafter, the component 10 for a human-powered vehicle will be referred to as the component 10. A human-powered vehicle is a vehicle that has at least one wheel and can be propelled at least by human-powered driving force. Human-powered vehicles include various types of bicycles, such as mountain bikes, road bikes, city bikes, cargo bikes, hand bikes, and recumbent bikes. There is no limit to the number of wheels a human-powered vehicle has. Human-powered vehicles also include, for example, one-wheeled vehicles and vehicles with two or more wheels. Human-powered vehicles are not limited to vehicles that can be propelled solely by human-powered driving force. Human-powered vehicles include E-bikes that use not only human-powered driving force but also the driving force of an electric motor for propulsion. E-bikes include electrically assisted bicycles, the propulsion of which is assisted by an electric motor. In the following embodiments, the human-powered vehicle will be described as an electrically assisted bicycle.

[0033] For example, the component 10 includes a motor 12 that assists in propulsion of a human-powered vehicle. For example, the motor 12 is configured to provide propulsive force to the human-powered vehicle. For example, the component 10 is a drive unit for the human-powered vehicle. For example, the component 10 is attached to the frame of the human-powered vehicle or to a wheel hub. In this embodiment, the component 10 is attached to the frame of the human-powered vehicle.

[0034] For example, the component 10 includes a crankshaft 14, an output unit 16, a reduction mechanism 18 that reduces the rotational speed of the motor 12 in multiple stages, and a clutch mechanism 20. The output unit 16 is coupled to the crankshaft 14. When the crankshaft 14 rotates in a first rotational direction, the output unit 16 rotates in a first rotational direction, and when the crankshaft 14 rotates in a second rotational direction, the output unit 16 rotates in a second rotational direction. The clutch mechanism 20 is provided between the output unit 16 and the reduction mechanism 18 and is configured to transmit the rotational force of the motor 12 from the reduction mechanism 18 to the output unit 16. The first rotational direction is the rotational direction of the crankshaft 14 when moving the human-powered vehicle forward.

[0035] For example, the reduction gear mechanism 18 includes a first gear 24 provided on the output shaft 12C of the motor 12 and a second gear 26 that meshes with the first gear 24. For example, the diameter of the first gear 24 is smaller than the diameter of the second gear 26, and the number of teeth of the first gear 24 is smaller than the number of teeth of the second gear 26.

[0036] For example, the component 10 further includes a housing 28 having an interior space S in which the motor 12 is disposed. The housing 28 includes a first housing 28A and a second housing 28B. The first housing 28A includes a first side surface of the component 10 in the axial direction of the crankshaft 14, and the second housing 28B includes a second side surface of the component 10 in the axial direction of the crankshaft 14.

[0037] Housing 28 includes mounting portion 28C for mounting component 10 to the frame of the human-powered vehicle. Mounting portion 28C is preferably provided on first housing 28A. Preferably, a plurality of mounting portions 28C are provided. Mounting portion 28C is provided on a protrusion that protrudes from the outer periphery of housing 28 around crankshaft 14. Mounting portion 28C includes insertion holes 28D into which bolts are inserted for mounting component 10 to the frame.

[0038] The housing 28 further includes a motor housing 30 for accommodating the motor 12. The motor housing 30 may be formed integrally with the housing 28 or may be formed separately. In this embodiment, the motor housing 30 is formed integrally with the second housing 28B. The housing 28 may be formed of metal, resin, or both metal and resin. In this embodiment, the housing 28 is formed of metal.

[0039] The first housing 28A includes a first hole 32A through which the first end 14A of the crankshaft 14 and the first end 16A of the output section 16 protrude. A first seal member 32B that contacts the first housing 28A and the output section 16 is provided in the internal space S near the first hole 32A. The second housing 28B includes a second hole 32C through which the second end 14B of the crankshaft 14 protrudes. A second seal member 32D that contacts the second housing 28B and the crankshaft 14 is provided in the internal space S near the second hole 32C. The first seal member 32B and the second seal member 32D are formed from an elastic resin material. The elastic resin material includes, for example, synthetic rubber.

[0040] The output unit 16 is a hollow shaft, and is disposed around the crankshaft 14 so that the first rotational axis C1 of the crankshaft 14 and the rotational axis of the output unit 16 are aligned. The output unit 16 is preferably provided on the crankshaft 14 so as to rotate integrally with the crankshaft 14. The output unit 16 is attached to the crankshaft 14 by, for example, spline fitting. For example, the output unit 16 is attached to the crankshaft 14 so as not to rotate relative to the crankshaft 14 about the first rotational axis C1.

[0041] The output portion 16 is rotatably supported relative to the housing 28 by a first bearing 34 provided near the first hole 32A of the first housing 28A and inside the housing 28. The first bearing 34 includes, for example, a rolling bearing. In this embodiment, the second end 16B of the output portion 16 is disposed closer to the second end 14B of the crankshaft 14 than the center of the crankshaft 14 in the axial direction of the crankshaft 14. The inner peripheral portion of the second end 16B of the output portion 16 has a spline and is coupled to the outer peripheral portion of the crankshaft 14.

[0042] The first end 14A of the crankshaft 14 is supported by the output portion 16 via a second bearing 36 provided on the inner periphery of the output portion 16. The second bearing 36 includes, for example, a plain bearing. The second end 14B of the crankshaft 14 is rotatably supported relative to the housing 28 by a third bearing 38 provided inside the housing 28 near the second hole 32C of the second housing 28B. The third bearing 38 includes, for example, a rolling bearing.

[0043] For example, the motor 12 is an electric motor. For example, the motor 12 is an inner rotor motor. For example, the motor 12 is a brushless motor. For example, the motor 12 is a three-phase motor. For example, the motor 12 includes a stator 12A. For example, the stator 12A is fixed to the inner surface of the motor housing 30. When the motor 12 is a three-phase motor, the stator 12A includes a U-phase coil, a V-phase coil, and a W-phase coil. For example, the motor 12 has 12 slots. For example, the motor 12 includes a rotor 12B. For example, the rotor 12B is disposed inside the stator 12A, and the output shaft 12C is fixed to the center of the rotor 12B in the radial direction. For example, the rotor 12B is made of a magnetic material. For example, the rotor 12B is formed by laminating multiple flat electromagnetic steel plates. For example, the rotor 12B is disposed in the internal space S of the housing 28. For example, the stator 12A and the rotor 12B are disposed in the internal space S of the housing 28.

[0044] For example, the component 10 further includes a rotating body. The rotating body is rotatable about a predetermined axis. For example, the rotating body is configured to rotate about an output shaft 12C. For example, the rotating body forms at least a part of the motor 12. In this embodiment, the rotating body constitutes the rotor 12B of the motor 12. For example, the rotor 12B is configured to be rotatable about a predetermined axis. In this embodiment, the rotor 12B is configured to be rotatable about a second rotational axis C2. For example, the second rotational axis C2 is configured parallel to the first rotational axis C1. For example, the second rotational axis C2 is the rotational axis of the output shaft 12C of the motor 12.

[0045] For example, the at least one magnet 22 is provided on the rotating body. In this embodiment, the at least one magnet 22 is provided on the rotor 12B. In this embodiment, the at least one magnet 22 is a magnet 22 that receives a magnetic field from a coil provided on the stator 12A and causes the rotor 12B to rotate. For example, the at least one magnet 22 is a permanent magnet. The at least one magnet 22 may be embedded in the rotor 12B or may be formed by magnetizing the rotor 12B.

[0046] For example, the at least one magnet 22 includes a plurality of magnets 22. The at least one magnet 22 is arranged so that the magnetic poles are aligned in the circumferential direction of the rotor 12B. For example, the plurality of magnets 22 are arranged at equal intervals around a predetermined axis. In this embodiment, the plurality of magnets 22 are arranged at equal intervals around the second rotational axis C2. For example, the plurality of magnets 22 are arranged at equal intervals on a first imaginary circle CX centered on the second rotational axis C2. For example, the number of the at least one magnet 22 is 14. For example, the at least one magnet 22 is arranged so that seven south poles and seven north poles are aligned in the circumferential direction of the rotor 12B.

[0047] An intermediate portion of the output shaft 12C is rotatably supported relative to the housing 28 by a fourth bearing 40 provided on the inner periphery of the third hole 28F of the second housing 28B. The fourth bearing 40 includes, for example, a rolling bearing. A first end portion 12D of the output shaft 12C is rotatably supported relative to the housing 28 by a fifth bearing 42 provided in the housing 28. The fifth bearing 42 includes, for example, a rolling bearing.

[0048] For example, the component 10 further includes a cover member 44 having a hole 44A formed therein through which the rotation shaft of the rotor 12B passes. In this embodiment, the hole 44A of the cover member 44 is formed so that the output shaft 12C of the motor 12 passes. For example, the hole 44A of the cover member 44 is formed integrally with the third hole 28F of the second housing 28B. The cover member 44 may be formed integrally with the housing 28 or may be formed separately. In this embodiment, the cover member 44 is formed separately from the second housing 28B. For example, the cover member 44 is made of a non-magnetic material.

[0049] For example, the cover member 44 divides the internal space S into a first space S1 in which the rotor 12B is disposed and a second space S2 in which at least one magnetic sensor 72 is disposed. For example, the first space S1 is formed by the cover member 44 and the motor housing 30. For example, a portion of the motor 12 is disposed in the first space S1. For example, the stator 12A, the rotor 12B, and at least a portion of the output shaft 12C are disposed in the first space S1. For example, a portion of the motor 12, a portion of the crankshaft 14, a portion of the output section 16, the reduction mechanism 18, and the clutch mechanism 20 are disposed in the second space S2. The cover member 44 is configured to support one end of a rotating shaft included in the reduction mechanism 18.

[0050] For example, the clutch mechanism 20 includes a one-way clutch 46. For example, the one-way clutch 46 includes at least one of a roller one-way clutch, a ratchet one-way clutch, and a sprag one-way clutch. For example, the one-way clutch 46 includes an inner ring body 46A, an outer ring body 46B, and a transmission body 46C provided between the inner ring body 46A and the outer ring body 46B. For example, the transmission body 46C includes rollers, pawls, and sprags. For example, the one-way clutch 46 is provided on the outer periphery of the output portion 16 around the first rotation axis C1. For example, the inner ring body 46A of the one-way clutch 46 is provided on the outer periphery of the output portion 16. The inner ring body 46A of the one-way clutch 46 may be formed integrally with the output portion 16. The outer diameter of the inner ring body 46A of the one-way clutch 46 is larger than the outer diameter of the output portion 16.

[0051] For example, the speed reduction mechanism 18 further includes a third gear 48 provided on the outer periphery of the one-way clutch 46, and a fourth gear 50 that meshes with the third gear 48. For example, the diameter of the third gear 48 is larger than the diameter of the fourth gear 50, and the number of teeth of the third gear 48 is greater than the number of teeth of the fourth gear 50. An outer ring 46B of the one-way clutch 46 is provided on the inner periphery of the third gear 48.

[0052] For example, the reduction mechanism 18 further includes an intermediate shaft 52 on which the second gear 26 and the fourth gear 50 are provided. The second gear 26 is configured to rotate integrally with the fourth gear 50. For example, the diameter of the second gear 26 is larger than the diameter of the fourth gear 50, and the number of teeth of the second gear 26 is greater than the number of teeth of the fourth gear 50. For example, the intermediate shaft 52 is formed of a metal material. The intermediate shaft 52 has a third rotational axis C3. For example, the third rotational axis C3 is configured to be parallel to the first rotational axis C1 and the second rotational axis C2.

[0053] For example, a first end 52A of the intermediate shaft 52 is rotatably supported with respect to the housing 28 by a sixth bearing 54 provided on the inner surface of the first housing 28A. For example, the sixth bearing 54 includes a rolling bearing. For example, a second end 52B of the intermediate shaft 52 is rotatably supported with respect to the housing 28 by a seventh bearing 56 provided on the inner surface of the second housing 28B. For example, the seventh bearing 56 is provided in the cover member 44. For example, the seventh bearing 56 includes a rolling bearing.

[0054] For example, the fourth gear 50 is integrally formed on the outer periphery of the intermediate shaft 52 around the third rotational axis C3. For example, the fourth gear 50 is made of a metal material. For example, the fourth gear 50 is integrally molded on the outer periphery of the intermediate shaft 52 around the third rotational axis C3. The fourth gear 50 and the second gear 26 are adjacent to each other in the direction in which the third rotational axis C3 of the intermediate shaft 52 extends. Of the recesses and protrusions forming the fourth gear 50, a portion closer to the first end 52A than the portion where the second gear 26 is provided functions as the fourth gear 50.

[0055] For example, the output section 16 and the third gear 48 are configured to rotate about the first rotational axis C1. For example, the output shaft 12C of the motor 12 and the first gear 24 are configured to rotate about the second rotational axis C2. For example, the second gear 26 and the fourth gear 50 are configured to rotate about the third rotational axis C3. For example, the first rotational axis C1, the second rotational axis C2, and the third rotational axis C3 are arranged on the same plane. At least one of the first rotational axis C1, the second rotational axis C2, and the third rotational axis C3 does not have to be arranged on the same plane.

[0056] For example, the component 10 further includes a circuit board 58. For example, the component 10 includes a control unit 60. For example, at least a part of the control unit 60 is provided on the circuit board 58. The control unit 60 includes an arithmetic processing unit that executes a predetermined control program. The arithmetic processing unit includes, for example, a CPU (Central Processing Unit) or an MPU (Micro Processing Unit). The control unit 60 may include one or more microcomputers.

[0057] For example, the component 10 further includes a storage unit that stores a control program and information used in the control process. The storage unit includes, for example, a non-volatile memory and a volatile memory.

[0058] Electronic components 58A are mounted on circuit board 58. Electronic components 58A may be mounted on both sides of circuit board 58 in the thickness direction of the board. Electronic components 58A include, for example, a microprocessor, a capacitor, and a resistor. Electronic components 58A may include at least one of a control unit 60 and a memory unit.

[0059] For example, the control unit 60 controls the motor 12. For example, the control unit 60 is configured to control the motor 12 in accordance with the output of at least one magnetic sensor 72. For example, at least a portion of the control unit 60 includes an inverter circuit 60A. For example, at least a portion of the control unit 60 provided on the circuit board 58 includes the inverter circuit 60A. The inverter circuit 60A is electrically connected to the motor 12 and configured to supply power to the motor 12. The control unit 60 controls the power supplied to the motor 12 via the inverter circuit 60A, thereby controlling the propulsive force that the motor 12 applies to the human-powered vehicle.

[0060] For example, the control unit 60 is configured to calculate the rotation speed of the motor 12 according to information about the rotation of the motor 12 input from at least one magnetic sensor 72. For example, the information about the rotation of the motor 12 is information about the magnetism of the magnet 22. For example, the information about the rotation of the motor 12 is information about the magnetic field of the magnet 22. For example, the rotation speed of the motor 12 is the rotation speed of the rotor 12B or the rotation speed of the output shaft 12C of the motor 12. For example, the control unit 60 is configured to calculate the rotation speed of the motor 12 from periodic changes in the magnetism detected by the magnetic sensor 72. For example, the control unit 60 is configured to control the motor 12 according to the calculated rotation speed of the motor 12.

[0061] For example, the circuit board 58 is disposed in the second space S2. For example, the circuit board 58 is disposed so as to extend in a direction substantially perpendicular to the axial direction of the output shaft 12C of the motor 12. For example, the circuit board 58 is disposed so as to extend in a direction substantially perpendicular to the axial direction of the crankshaft 14. When viewed in a direction perpendicular to the axial direction of the crankshaft 14, the circuit board 58 is disposed so as to overlap at least a portion of the motor 12. For example, when viewed in a direction perpendicular to the axial direction of the crankshaft 14, the circuit board 58 is disposed so as to overlap at least a portion of the reduction gear mechanism 18. For example, when viewed in a direction perpendicular to the axial direction of the crankshaft 14, the circuit board 58 is disposed so as to overlap at least a portion of the first gear 24 and the second gear 26.

[0062] For example, the circuit board 58 has a recess 58B formed in its outer periphery when viewed in the axial direction of the crankshaft 14. For example, a portion of the output shaft 12C of the motor 12 is disposed in the recess 58B. The recess 58B is disposed close to the outer peripheries of the first gear 24 and the second gear 26, and is formed so as to follow a portion of the outer peripheries of the first gear 24 and the second gear 26. The electrical terminal 12E of the motor 12 is directly connected to the circuit board 58 by passing through a through-hole formed in the second housing 28B.

[0063] For example, the component 10 includes a torque sensor 62 that detects the manual driving force. For example, the torque sensor 62 is provided in a transmission path of the manual driving force between the crankshaft 14 and a portion of the output section 16 to which the clutch mechanism 20 is connected. The torque sensor 62 is used to detect the torque of the manual driving force.

[0064] For example, the torque sensor 62 is connected to a first circuit board 64 via a flexible printed wiring board. The first circuit board 64 is provided with a first signal processing circuit that processes a signal output from the torque sensor 62 and a first antenna unit connected to the first signal processing circuit. The first circuit board 64 is attached to the output unit 16 via a first board holder 64A.

[0065] A second circuit board 66 is provided in the internal space S of the housing 28, facing the first circuit board 64 in the direction of the first rotation axis C1 and arranged with a gap between it and the first circuit board 64. The second circuit board 66 is attached to the housing 28 via a second board holder 66A, for example, but may also be attached directly to the housing 28.

[0066] The second circuit board 66 is provided with a second antenna unit facing the first antenna unit. The second circuit board 66 is provided with a second signal processing circuit that processes signals received by the second antenna unit and a power supply circuit that supplies power to the first antenna unit via the second antenna unit. The second circuit board 66 is electrically connected to the circuit board 58 via an electric cable. The output of the torque sensor 62 is wirelessly transmitted to the second antenna unit via the first antenna unit. The control unit 60 preferably controls the motor 12 in accordance with the output of the torque sensor 62. The control unit 60 may control the motor 12 in accordance with a signal corresponding to the manual driving force detected by the torque sensor 62 so that the manual driving force and the propulsive force generated by the motor 12 have a predetermined ratio.

[0067] For example, the component 10 further includes a wireless unit 68 that is provided on the circuit board 58 and performs at least one of transmitting and receiving wireless signals. The wireless unit 68 is configured to be able to communicate using at least one of the following communication methods: Bluetooth (registered trademark), ANT+ (registered trademark), Wi-Fi (registered trademark), and infrared communication. The wireless unit 68 may communicate using a unique communication method other than Bluetooth, ANT+, Wi-Fi, and general-purpose infrared communication.

[0068] The wireless unit 68 is configured to wirelessly communicate with an external device. The wireless unit 68 is electrically connected to the control unit 60 via printed wiring on the circuit board 58. The wireless unit 68 is configured to receive a wireless signal transmitted from the external device to the component 10, and to output a signal corresponding to the received wireless signal to the control unit 60. The wireless unit 68 is configured to receive a signal from the control unit 60, and to transmit a wireless signal corresponding to the signal input from the control unit 60 to the external device.

[0069] The external device is configured to control components for the human-powered vehicle other than the component 10 in response to the wireless signal transmitted from the wireless unit 68. The external device includes, for example, at least one of a display, a cycle computer, a smartphone, a tablet computer, and a personal computer.

[0070] The component 10 includes at least one yoke 70 and at least one magnetic sensor 72. The at least one magnetic sensor 72 is configured to detect the magnetic field of the at least one magnet 22. For example, the magnetic sensor 72 includes a magnetic detection element. For example, the magnetic detection element is a Hall element.

[0071] For example, the at least one magnetic sensor 72 includes a plurality of magnetic sensors 72. In this embodiment, the at least one magnetic sensor 72 includes three magnetic sensors 72. For example, the number of the at least one magnetic sensors 72 matches the number of phases of the motor 12. For example, if the motor 12 is a three-phase motor, the at least one magnetic sensor 72 includes three magnetic sensors 72.

[0072] For example, the three magnetic sensors 72 are arranged around a predetermined axis line, and are arranged side by side on a first imaginary circle CX on which the multiple magnets 22 are arranged at equal intervals when viewed from the axial direction of the second rotation axis C2.

[0073] For example, the at least one magnetic sensor 72 is provided on the circuit board 58. For example, the magnetic sensor 72 includes a detection surface 72A on which a magnetic detection element is arranged. For example, the detection surface 72A is formed so as to be substantially perpendicular to the direction in which a predetermined axis extends. For example, the detection surface 72A is formed so as to be substantially perpendicular to the axial direction of the second rotation axis C2. For example, the at least one magnetic sensor 72 is provided on the circuit board 58 so that the detection surface 72A faces the direction of the at least one magnet 22 in the direction in which the predetermined axis extends. In the present embodiment, for example, the at least one magnetic sensor 72 is provided on the circuit board 58 so that the detection surface 72A faces the direction of the at least one magnet in the axial direction of the second rotation axis C2.

[0074] For example, at least one magnetic sensor 72 is electrically connected to the control unit 60. For example, the magnetic sensor 72 is electrically connected to the control unit 60 via printed wiring on the circuit board 58. For example, the output of the magnetic sensor 72 corresponds to information related to the rotation of the motor 12. For example, the output of the magnetic sensor 72 corresponds to information related to the rotation angle of the motor 12. For example, the magnetic sensor 72 is configured to output a voltage signal that changes in accordance with the magnetism of the magnet 22 to the control unit 60. The magnetic sensor 72 may be configured to calculate the rotation angle of the motor 12 based on the voltage signal that changes in accordance with the magnetism of the magnet 22, and to transmit information related to the calculated rotation angle of the motor 12 to the control unit 60.

[0075] For example, the at least one yoke 70 is positioned relative to the rotor 12B and the magnetic sensor 72 and is disposed in the second space S2 so as to induce the magnetism of the magnet 22 to the magnetic sensor 72. The at least one magnetic sensor 72 is configured to detect the magnetism of the at least one magnet 22 via the at least one yoke 70. For example, the yoke 70 is made of a magnetic material. For example, the magnetic material constituting the yoke 70 is an electromagnetic steel plate or iron. For example, the yoke 70 has the same magnetic permeability as the rotor 12B. For example, the yoke 70 has the same magnetic permeability as the stator core of the stator 12A. For example, the stator core is made by laminating a plurality of flat electromagnetic steel plates. For example, the magnetic permeability of the yoke 70 is 1.0×10 -4 For example, the magnetic permeability of the yoke 70 is 1.0×10 -3 H / m or more.

[0076] For example, at least a portion of the at least one yoke 70 is disposed in a region between the at least one magnet 22 and the at least one magnetic sensor 72 in the direction in which the predetermined axis extends. In the present embodiment, the entire at least one yoke 70 is disposed in a region between the at least one magnet 22 and the at least one magnetic sensor 72 in the axial direction of the second rotation axis C2. For example, the at least one yoke 70 is disposed substantially parallel to the second rotation axis C2. For example, at least a portion of the at least one yoke 70 is disposed in the first space S1 and at least a portion of the at least one yoke 70 is disposed in the second space S2. The cover member 44 is formed with at least one insertion hole 44B through which the at least one yoke 70 is inserted. In the present embodiment, the cover member 44 is formed with three insertion holes 44B.

[0077] For example, the at least one yoke 70 includes a plurality of yokes 70. For example, the number of the plurality of yokes 70 matches the number of the at least one magnetic sensor 72. In this embodiment, the at least one yoke 70 includes three yokes 70. For example, the yoke 70 is a polygonal prism or a cylinder whose height direction is the axial direction of the second rotation axis C2. The polygonal prism is, for example, a quadrangular prism, a hexagonal prism, an octagonal prism, or a dodecagonal prism. In this embodiment, the yoke 70 is a polygonal prism whose height direction is the axial direction of the second rotation axis C2. In this embodiment, the yoke 70 is an octagonal prism whose height direction is the axial direction of the second rotation axis C2.

[0078] For example, at least one yoke 70 includes a first opposing surface 74 facing the at least one magnetic sensor 72 and a second opposing surface 76 facing the rotating body. For example, the first opposing surface 74 and the second opposing surface 76 are formed as planes substantially perpendicular to the second rotation axis C2. The yoke 70 is configured so that magnetism is induced from the second opposing surface 76 to the first opposing surface 74. In this embodiment, the size of the first opposing surface 74 is equal to the size of the second opposing surface 76. The shape of the first opposing surface 74 may be the same as or different from the shape of the second opposing surface 76. In this embodiment, the shape of the first opposing surface 74 is the same as the shape of the second opposing surface 76.

[0079] For example, the first opposing surface 74 is formed at a first end 70A of the yoke 70 at the second rotation axis C2. The first opposing surface 74 is configured to face the detection surface 72A of the magnetic sensor 72 in the axial direction of the second rotation axis C2. For example, the size of the first opposing surface 74 is 1 mm 2 More than 5mm 2 The following is the result.

[0080] For example, the magnetic sensor 72 is configured to detect magnetism generated from the first opposing surface 74. For example, the first opposing surface 74 is smaller than a detection surface 72A of the magnetic sensor 72. For example, a distance W1 from the first opposing surface 74 to the detection surface 72A in the axial direction of the second axis of rotation C2 is not less than 0.5 mm and not more than 10 mm.

[0081] The second opposing surface 76 is formed at the second end 70B of the yoke 70 on the second rotation axis C2. The second opposing surface 76 is configured to face the plurality of magnets 22 of the rotor 12B in the axial direction of the second rotation axis C2. For example, the size of the second opposing surface 76 is 1 mm 2 More than 5mm 2 The following is the result.

[0082] For example, the multiple magnets 22 include a third opposing surface 22A that faces the second opposing surface 76. In this embodiment, the second opposing surface 76 is smaller than the third opposing surface 22A of the multiple magnets 22. For example, the distance W2 from the second opposing surface 76 to the third opposing surface 22A in the axial direction of the second rotation axis C2 is 0.5 mm or more and 10 mm or less.

[0083] For example, the multiple yokes 70 are arranged around a predetermined axis. In this embodiment, the multiple yokes 70 are arranged around the second rotation axis C2. For example, the multiple yokes 70 are arranged side by side on an imaginary circle C whose center is the predetermined axis. In this embodiment, the multiple yokes 70 are arranged side by side on an imaginary circle C whose center is the second rotation axis C2. For example, the multiple yokes 70 are arranged side by side on the imaginary circle C with the central axes of the yokes 70 aligned side by side.

[0084] For example, the imaginary circle C substantially coincides with the first imaginary circle CX when viewed from the axial direction of the second rotation axis C2. For example, the position of the yoke 70 and the position of the magnetic sensor 72 substantially coincide on the first imaginary circle CX. For example, the distance between two adjacent yokes 70 on the first imaginary circle CX substantially coincides with the distance between two adjacent magnetic sensors 72 on the first imaginary circle CX. For example, the distance between two adjacent yokes 70 on the first imaginary circle CX is shorter than the distance between two adjacent magnets 22 on the first imaginary circle CX. For example, the distance between two adjacent yokes 70 on the first imaginary circle CX is shorter than the distance from the center of the north pole to the center of the south pole of adjacent north and south poles on the first imaginary circle CX.

[0085] At least one yoke 70 is arranged to be movable relative to the at least one magnet 22. For example, as the at least one yoke 70 moves relative to the at least one magnet 22, the second opposing surface 76 of the at least one yoke 70 moves relative to the third opposing surface 22A of the at least one magnet 22. For example, the at least one yoke 70 is arranged to be movable relative to the at least one magnet 22 provided on a rotating body that can rotate about a predetermined axis. In this embodiment, the at least one yoke 70 is arranged to be movable relative to the at least one magnet 22 provided on a rotating body that can rotate about a second rotation axis C2. For example, as the rotor 12B rotates about the second rotation axis C2, the magnet 22 rotates about the second rotation axis C2, and the yoke 70 moves relative to the magnet 22.

[0086] For example, the magnetic sensor 72 is disposed so that at least a portion of the detection surface 72A overlaps the imaginary circle C when viewed from the axial direction of the second rotation axis C2. For example, the magnet 22 is disposed so that at least a portion of the third opposing surface 22A overlaps the imaginary circle C when viewed from the axial direction of the second rotation axis C2. For example, the magnetic sensor 72 is configured to detect the magnetism of the magnet 22 moving on the imaginary circle C via the yoke 70.

[0087] For example, at least one yoke 70 is arranged so as to be immovable relative to at least one magnetic sensor 72. For example, the first opposing surface 74 is arranged so as to be immovable relative to the detection surface 72A of the magnetic sensor 72. The first opposing surface 74 may or may not contact the detection surface 72A of the magnetic sensor 72. In this embodiment, the first opposing surface 74 is configured so as not to contact the detection surface 72A of the magnetic sensor 72.

[0088] For example, the component 10 further includes a positioning member 78 that positions the at least one yoke 70 relative to the rotor 12B and the at least one magnetic sensor 72. For example, the positioning member 78 is made of a non-magnetic material. For example, the non-magnetic material that makes up the positioning member 78 is resin, an aluminum alloy, or a magnesium alloy.

[0089] For example, the positioning member 78 is formed in a plate shape and is disposed in the second space S2 so that its thickness direction faces the axial direction of the second rotational axis C2. For example, the positioning member 78 is disposed between the cover member 44 and the circuit board 58 in the axial direction of the second rotational axis C2. For example, the positioning member 78 includes at least one through hole 78A through which at least one yoke 70 passes. The number of the at least one through holes 78A corresponds to the number of the at least one yoke 70. The through hole 78A of the positioning member 78 is configured to overlap with the insertion hole 44B of the cover member 44 when viewed in the axial direction of the second rotational axis C2.

[0090] For example, the positioning member 78 is provided on the cover member 44. In this embodiment, the positioning member 78 is detachably provided on the cover member 44. For example, the component 10 further includes a fastener member 80 that detachably fixes the positioning member 78 to the cover member 44. The fastener member 80 only needs to be capable of detachably fixing the positioning member 78 to the cover member 44. In this embodiment, the fastener member 80 is formed with a male thread portion, and the cover member 44 is formed with a female thread portion that engages with the male thread portion of the fastener member 80. For example, the fastener member 80 may be a nut, and the cover member 44 may be provided with a bolt that engages with the nut of the fastener member 80. For example, the fastener member 80 may be made of a non-magnetic material.

[0091] For example, the at least one yoke 70 is press-fitted into the positioning member 78. For example, the at least one yoke 70 is press-fitted into the through-hole 78A of the positioning member 78. For example, the at least one yoke 70 is adhered to the positioning member 78. For example, the at least one yoke 70 is adhered with an adhesive while being disposed in the through-hole 78A of the positioning member 78. The at least one yoke 70 is provided to the positioning member 78 by at least one of press-fitting and adhering. In this embodiment, the yoke 70 is provided to the positioning member 78 by being press-fitted into the through-hole 78A and adhered to the positioning member 78 with an adhesive.

[0092] Under the condition that the distance from the magnetic sensor 72 to the magnet 22 is equal, when the magnetic sensor 72 detects a magnetic field via the yoke 70, the magnetic sensor 72 can detect a stronger magnetic field than when the magnetic field is detected without the yoke 70. Therefore, by detecting the magnetic field via the yoke 70, the magnetic sensor 72 of the component 10 can be placed at a position away from the magnet 22.

[0093] Second Embodiment A component 10 of the second embodiment will be described with reference to Figure 10. The component 10 of the second embodiment is similar to the component 10 of the first embodiment except for the fact that the component 10 does not include a cover member 44 and the configuration of the positioning member 78. Therefore, the same reference numerals as in the first embodiment are used for the configurations common to the first embodiment, and redundant explanations will be omitted.

[0094] In the present embodiment, for example, the positioning member 78 is provided on the stator 12A. The positioning member 78 is disposed between the rotor 12B and the circuit board 58 in the axial direction of the second rotational axis C2. For example, the positioning member 78 divides the internal space S into a first space S1 in which the rotor 12B is disposed and a second space S2 in which at least one magnetic sensor 72 is disposed.

[0095] For example, the positioning member 78 includes a fastener portion 82. For example, the fastener portion 82 is configured to engage with the stator 12A. For example, the fastener portion 82 has a male thread formed thereon, and the stator 12A has a female thread formed thereon with which the male thread of the fastener portion 82 engages.

[0096] The component 10 may or may not include the cover member 44. In the present embodiment, the component 10 does not include the cover member 44. When the component 10 includes the cover member 44, the cover member 44 may be disposed between the positioning member 78 and the circuit board 58 in the axial direction of the second rotation axis C2.

[0097] Third Embodiment A component 10 of the third embodiment will be described with reference to Fig. 11. The component 10 of the third embodiment is similar to the component 10 of the first embodiment except for the configuration of the positioning member 78. Therefore, the same reference numerals as in the first embodiment are used for the configurations common to the first embodiment, and redundant description will be omitted.

[0098] In this embodiment, for example, the positioning member 78 is formed integrally with the cover member 44. In this embodiment, the positioning member 78 is formed integrally with the cover member 44 by being insert molded into the cover member 44. The positioning member 78 may also be formed integrally with the cover member 44 using the same material as the cover member 44.

[0099] In this embodiment, for example, the insertion hole 44B of the cover member 44 is configured as the through-hole 78A of the positioning member 78. For example, at least one yoke 70 is press-fitted into the insertion hole 44B of the cover member 44. For example, the at least one yoke 70 is bonded with an adhesive while being placed in the insertion hole 44B of the cover member 44.

[0100] <Example of change> The descriptions of each embodiment are intended to exemplify possible forms of components for a human-powered vehicle according to the present disclosure and are not intended to limit the forms. Components for a human-powered vehicle according to the present disclosure may take the form of, for example, modified examples of the embodiments shown below, or a combination of at least two mutually consistent modified examples. In the following modified examples, parts that are common to the embodiments will be assigned the same reference numerals as in the embodiments, and their description will be omitted.

[0101] The first opposing surface 74 of the yoke 70 may be larger than the second opposing surface 76. For example, the area of ​​the first opposing surface 74 is greater than one time and not greater than 1.5 times the area of ​​the second opposing surface 76. For example, as shown in FIG. 12 , the yoke 70 is formed so that the outer diameter of the portion closer to the magnetic sensor 72 than the positioning member 78 is smaller than the outer diameter of the portion closer to the magnet 22 than the positioning member 78.

[0102] The first opposing surface 74 may be smaller than the second opposing surface 76. When the first opposing surface 74 is smaller than the second opposing surface 76, the magnetic field that enters from the second opposing surface 76 and exits from the first opposing surface 74 is converged at the first opposing surface 74, allowing the magnetic sensor 72 to detect the magnetic field appropriately.

[0103] The yoke 70 may be formed of a plurality of plate-shaped members 84. For example, as shown in FIG. 13, the yoke 70 is formed of a laminated structure in which a plurality of plate-shaped members 84 are stacked in a direction perpendicular to the second rotation axis C2. The plate-shaped members 84 are formed of a magnetic material. The magnetic material constituting the plate-shaped members 84 is, for example, an electromagnetic steel plate or iron. The surface of the plate-shaped members 84 in the direction perpendicular to the second rotation axis C2 is insulated. When the yoke 70 is formed of the plate-shaped members 84, magnetic loss due to the generation of eddy currents can be suppressed when magnetism is induced from the second opposing surface 76 to the first opposing surface 74.

[0104] The positioning member 78 may be fixed non-removably to the cover member 44. For example, the positioning member 78 may be fixed non-removably to the cover member 44 by caulking or welding.

[0105] At least one yoke 70 may be insert molded into the positioning member 78. For example, at least one yoke 70 is insert molded into the through-hole 78A of the positioning member 78.

[0106] For example, the component 10 may be a speed detection device for a human-powered vehicle. When the component 10 is a speed detection device for a human-powered vehicle, the at least one yoke 70 may be disposed in a region between the at least one magnet 22 provided on the wheel and the at least one magnetic sensor 72.

[0107] For example, the component 10 may be a crank rotation state detection device. When the component 10 is a crank rotation state detection device, the at least one yoke 70 may be disposed in a region between the at least one magnet 22 provided on the crankshaft 14 and the at least one magnetic sensor 72.

[0108] For example, the cover member 44 may be provided on the stator 12A. When the cover member 44 is provided on the stator 12A, the first space S1 in which the rotor 12B is disposed is formed by the cover member 44 and the stator 12A.

[0109] For example, the circuit board 58 may include a third circuit board disposed in the first space S1 and a fourth circuit board disposed in the second space S2. For example, the third circuit board may be electrically connected to the stator 12A and may include an inverter circuit 60A. For example, the fourth circuit board may have at least one of the electronic components 58A, the control unit 60, the storage unit, the wireless unit 68, and the magnetic sensor 72 mounted thereon. The third circuit board and the fourth circuit board may be electrically connected by pins, a harness, or the like.

[0110] The phrase "at least one" as used herein means "one or more" of the desired options. As an example, the phrase "at least one" as used herein means "only one option" or "both of two options" when the number of options is two. As another example, the phrase "at least one" as used herein means "only one option" or "any combination of two or more options" when the number of options is three or more. [Explanation of symbols]

[0111] 10...component, 12...motor, 12A...stator, 12B...rotor, 22...magnet, 28...housing, 44...cover member, 44A...hole, 58...circuit board, 60...control unit, 60A...inverter circuit, 68...wireless unit, 70...yoke, 72...magnetic sensor, 74...first opposing surface, 76...second opposing surface, 78...positioning member, 80...fastener member.

Claims

1. A component for a human-powered vehicle, At least one yoke disposed so as to be movable relative to the at least one magnet; at least one magnetic sensor configured to detect the magnetic field of the at least one magnet via the at least one yoke; the at least one magnet is provided on a rotor that is rotatable about a predetermined axis, the rotating body constitutes a rotor of a motor, the motor is a three-phase motor, the at least one magnetic sensor includes three magnetic sensors; The component, wherein the at least one yoke includes three yokes.

2. a circuit board on which at least a part of a control unit that controls the motor is provided; The component of claim 1 , wherein the at least one magnetic sensor is mounted on the circuit board.

3. The component of claim 2 , wherein at least a portion of the control unit includes an inverter circuit.

4. The component according to claim 2 or 3, further comprising a radio unit mounted on the circuit board, the radio unit performing at least one of transmitting a radio signal and receiving a radio signal.

5. the at least one magnetic sensor is electrically connected to the controller; 5. The component of claim 2, wherein the controller is configured to control the motor in response to an output of the at least one magnetic sensor.

6. A component for a human-powered vehicle, At least one yoke disposed so as to be movable relative to the at least one magnet; at least one magnetic sensor configured to detect the magnetic field of the at least one magnet via the at least one yoke; the at least one magnet is provided on a rotor that is rotatable about a predetermined axis, the rotating body constitutes a rotor of a motor, The component further comprises a positioning member for positioning the at least one yoke relative to the rotor and the at least one magnetic sensor.

7. a cover member having a hole through which the rotation shaft of the rotor passes; The component of claim 6 , wherein the positioning member is provided on the cover member.

8. The component of claim 7 , further comprising a fastener member that removably secures the positioning member to the cover member.

9. The component of claim 7 , wherein the positioning member is non-removably secured to the cover member.

10. The component of claim 7 , wherein the positioning member is integrally formed with the cover member.

11. a housing having an interior space in which the motor is disposed; the rotor is disposed in the interior space of the housing; The component according to claim 7 , wherein the cover member divides the internal space into a first space in which the rotor is disposed and a second space in which the at least one magnetic sensor is disposed.

12. the motor includes a stator; The component of claim 6 , wherein the positioning member is provided on the stator.

13. The component of claim 6 , wherein the at least one yoke is press-fit into the positioning member.

14. The component of claim 6 , wherein the at least one yoke is glued to the positioning member.

15. The component of claim 6 , wherein the at least one yoke is insert molded into the positioning member.

16. The component of claim 1 , wherein the at least one yoke includes a first facing surface facing the at least one magnetic sensor and a second facing surface facing the rotating body.

17. The component of claim 1 , further comprising the rotating body.

18. A component for a human-powered vehicle, At least one yoke disposed so as to be movable relative to the at least one magnet; at least one magnetic sensor configured to detect the magnetic field of the at least one magnet via the at least one yoke; the at least one magnet is provided on a rotor that is rotatable about a predetermined axis, the at least one yoke includes a first opposing surface facing the at least one magnetic sensor and a second opposing surface facing the rotating body, The first opposing surface is larger than the second opposing surface.

19. Further comprising the rotating body, The component of claim 18 , wherein the rotating body comprises a rotor of a motor.

20. 20. The component of any one of claims 1 to 17 and 19, wherein the motor is configured to provide propulsion to the human-powered vehicle.

21. A component described in any one of claims 1 to 20, wherein at least a portion of the at least one yoke is positioned in an area between the at least one magnet and the at least one magnetic sensor in the direction of extension of the predetermined axis.

22. the at least one magnet includes a plurality of magnets; 22. The component of claim 1, wherein the plurality of magnets are equally spaced about the predetermined axis.

23. the at least one yoke includes a plurality of yokes; The component according to claim 1 , wherein the plurality of yokes are arranged side by side on an imaginary circle centered on the predetermined axis.

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