WO2016199810A1

WO2016199810A1 - Lighting device for bicycle

Info

Publication number: WO2016199810A1
Application number: PCT/JP2016/067051
Authority: WO
Inventors: 真力石; 渡辺　知幸; 拓人田邉
Original assignee: 株式会社ミツバ
Priority date: 2015-06-12
Filing date: 2016-06-08
Publication date: 2016-12-15
Also published as: JPWO2016199810A1; JP6698080B2; DE112016002655T5

Abstract

The present invention has: a power source unit for generating power in response to the traveling of a bicycle; a light-emitting body for emitting light from the power generated by the power source unit; a voltage-doubler rectifier circuit that is electrically connected to one output terminal of the power source unit, the voltage-doubler rectifier circuit converting the AC voltage generated by the power source unit into direct current; and an intermediate voltage point of the voltage-doubler rectifier circuit, the intermediate voltage point being electrically connected to the other output terminal of the power source unit. Either the electrical connection between the voltage-doubler rectifier circuit and the one output terminal of the power source unit, or the electrical connection between the intermediate voltage point of the voltage-doubler rectifier circuit and the other output terminal of the power source unit is electrically connected via the frame of the bicycle.

Description

Bicycle lighting device

The present invention relates to a bicycle lighting device.
This application claims priority based on Japanese Patent Application No. 2015-119217 for which it applied to Japan on June 12, 2015, and uses the content here.

As shown in FIG. 9, a conventional bicycle lighting device includes a dynamo 800 and a headlamp 900 provided at the front portion (with respect to the traveling direction) of the bicycle frame. The headlamp 900 includes a rectifier circuit 910 that rectifies the power generated by the dynamo 800 and a light emitter 920 that is lit by a voltage rectified by the rectifier circuit 910.
One output terminal 801 of the dynamo 800 is connected to the anode of the diode D1 of the rectifier circuit 910 via a cable. The other output terminal 802 of the dynamo 800 is connected to the bicycle frame. Similarly, the negative terminal (cathode) of the light emitter 920 is also connected to the bicycle frame. Therefore, the connection between the dynamo 800 and the headlamp 900 is electrically connected by one cable (one-wire type) and the bicycle frame.

In the conventional bicycle lighting device, the illuminance (brightness) of the light emitter 920 may not be sufficient because the output voltage of the dynamo 800 is low when the bicycle is traveling at a low speed. Accordingly, it has been proposed to boost the output voltage of a dynamo by providing a conventional bicycle lighting device with a voltage doubler rectifier circuit (see Patent Document 1).

JP 2003-212172 A

However, in the conventional bicycle lighting device, when the voltage doubler rectifier circuit is used, the voltages at the output terminal 802 of the dynamo and the negative terminal of the light emitter 920 do not match. Therefore, when the negative terminal of the light emitter 920 is connected to the bicycle frame as in the prior art, a new cable is required to connect the output terminal 802 of the dynamo to the voltage doubler rectifier circuit, which is higher than in the prior art. Cost.

The present invention provides a bicycle lighting device that connects a dynamo and a headlamp with a one-wire system even when a voltage doubler rectifier circuit is provided.

According to one embodiment of the present invention, a power source that generates electricity in accordance with the traveling of a bicycle, a light emitter that emits light by power generation of the power source, and one output terminal of the power source are electrically connected to the power source. A voltage doubler rectifier circuit that converts an AC voltage to be generated into a direct current; and an intermediate voltage point of the voltage doubler rectifier circuit that is electrically connected to the other output terminal of the power supply unit. Any one of an electrical connection between the rectifier circuit and one output terminal of the power supply unit and an electrical connection between the intermediate voltage point of the voltage doubler rectifier circuit and the other output terminal of the power supply unit is the frame of the bicycle It is the illuminating device for bicycles electrically connected via.

Also, one embodiment of the present invention is the bicycle lighting device described above, wherein the power supply unit is a hub dynamo.

Further, one embodiment of the present invention is the above-described bicycle lighting device, and the light emitter is an LED.

Another aspect of the present invention is the above-described bicycle lighting device, wherein the hub dynamo is fixed to a rotor that rotates together with a wheel and a wheel shaft that rotatably supports the wheel. A stator disposed on the inner peripheral side of the rotor, and configured to rectify an alternating current output from a coil of the stator by rotation of the rotor and supply the alternating current to the light emitter. A two-phase coil that outputs an alternating current out of phase is provided.

The above bicycle lighting device can connect the dynamo and the light emitter in a one-wire system even when the voltage doubler rectifier circuit is provided.

It is a side view of the bicycle which attached the illuminating device 150 for bicycles in embodiment of this invention. It is a side view of the hub dynamo 10 in the embodiment of the present invention. It is sectional drawing of the hub dynamo 10 in embodiment of this invention. It is a perspective view of the stator which comprises the hub dynamo 10 in embodiment of this invention. It is a figure which shows the voltage waveform which the hub dynamo 10 in embodiment of this invention outputs. It is a figure which shows the top view of the headlamp in embodiment of this invention. It is a figure which shows an example of schematic structure of the illuminating device 150 for bicycles in embodiment of this invention. It is a figure which shows an example of schematic structure of the illuminating device 150 for bicycles of this modification. It is a figure which shows an example of the circuit structure of the conventional bicycle illuminating device.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view of a bicycle using a bicycle lighting device 150 according to an embodiment of the present invention. The bicycle lighting device 150 includes, for example, the hub dynamo 10 and the headlamp 4 as a power source that generates electricity in accordance with the traveling of the bicycle. In the following description, a case where the hub dynamo 10 is attached to the wheel shaft 11 of the bicycle 1 and electric power is supplied to the headlamp 4 of the bicycle 1 will be described.

(Attachment mode of bicycle lighting device 150)
The front wheel 5 of the bicycle 1 is rotatably supported via a wheel shaft 11 by a front fork 3 constituting a part of the frame. Both sides of the wheel shaft 11 are fastened and fixed to the front fork 3 by a nut (not shown) or the like so as not to rotate. A hub dynamo 10 is attached coaxially to the wheel shaft 11 at most of the axial center of the wheel shaft 11. The hub dynamo 10 supplies electric power to the headlamp 4 disposed on the side of the front wheel 5.
The headlamp 4 has a light stay 6, and the light stay 6 is fixed to a fixture 7 attached to the front fork 3 with screws. The front fork 3, the fixture 7 and the light stay 6 are made of metal and are electrically connected to each other.

The hub dynamo 10 is connected to the spoke 2 of the front wheel 5 and rotates around the wheel shaft 11 together with the front wheel 5, and is mounted on the wheel shaft 11 in a non-rotatable manner while being positioned on the inner peripheral side of the rotor 12. And a stator 13.

Hereinafter, the axial direction of the central axis O of the wheel shaft 11 is simply referred to as the axial direction, the direction orthogonal to the axial direction is referred to as the radial direction, and the direction along the central axis O is referred to as the circumferential direction. Note that a male screw portion is formed in a portion of the wheel shaft 11 that is located at least on the axially outer side than the portion to which the stator 13 is attached.

(Rotor)
FIG. 2 is a side view of the hub dynamo 10, and FIG. 3 is a cross-sectional view of the hub dynamo 10.
As shown in FIGS. 2 and 3, the rotor 12 is mainly composed of a hub shell 100. The hub shell 100 includes a cylindrical body portion 61, and a first end plate 70 and a second end plate 80 that block both axial end openings of the body portion 61.

As shown in FIG. 2, the opening on the one axial P side (left side in FIG. 2) of the body 61 is open at the time of manufacture, and is manufactured separately from the body 61 so as to close the opening. The second end plate 80 is press-fitted and fixed to the end portion on the one axial side P side of the body portion 61 after a predetermined assembly process.

The opening on the other Q side (right side in FIG. 2) of the barrel portion 61 in the axial direction is closed from the time of manufacture by the first end plate 70 formed integrally with the barrel portion 61. The cylindrical body portion 61 and the first end plate 70 that closes the opening on the axial direction Q side of the body portion 61 are manufactured as a hub shell body 60 that is an integral part. The hub shell main body 60 and the second end plate 80 that is separate from the hub shell main body 60 are manufactured by press-molding a magnetic metal plate (mainly an iron plate) having a certain thickness.

A pair of left and right flange portions 62 projecting outward in the radial direction is formed on the outer periphery of both end portions in the axial direction of the body portion 61 of the hub shell body 60. Each flange portion 62 is formed by folding a metal plate, which is a raw material, into a U-shape at the time of press molding, and overlapping the axially inner flange plate 62a and the axially outer flange plate 62b in close contact with each other. Yes. A plurality of support holes 63 penetrating in the axial direction are formed in each flange portion 62 at equal intervals in the circumferential direction.

As shown in FIG. 1, inner ends of a plurality of spokes 2 extending from the rim 5 a of the front wheel 5 to the inner diameter side are engaged with the support hole 63. It should be noted that the support holes 63 of the left and right flange portions 62 are arranged with a phase shifted by a half pitch.

The first end plate 70 that closes the opening in the axial direction Q side of the body portion 61 includes an annular side wall 71 that swells in a conical shape on the outer side (Q side) in the axial direction, and an inner side in the axial direction at the inner peripheral edge of the side wall 71. A cylindrical bearing fitting wall 73 bent to the (P side), a bearing retainer wall 74 bent radially inward at the axially inner (P side) end of the bearing fitting wall 73, and the outside of the side wall 71 And a flange portion 75 provided continuously from the periphery toward the outside in the radial direction.
The flange portion 75 is continuous with the flange plate 62b on the outer side of the flange portion 62 on the axial direction Q side of the barrel portion 61, so that the barrel portion 61 and the first end plate 70 are integrated. Yes. Thereby, the hub shell main body 60 as an integral part is configured.

The second end plate 80 that closes the opening on the axial direction P side of the body portion 61 includes an annular side wall 81 and a cylindrical bearing that is bent axially inward (Q side) at the inner peripheral edge of the side wall 81. A fitting wall 83, a bearing pressing wall 84 bent radially inward at the axially inner (Q side) end of the bearing fitting wall 83, and an axially inner side (Q side) at the outer peripheral edge of the side wall 81. A cylindrical press-fitting fitting wall 85 that is bent.
The second end plate 80 is fixed to the body 61 by press-fitting the cylindrical press-fitting fitting wall 85 to the inner periphery of the opening on the axial direction P side of the body 61 of the hub shell body 60. ing.

The radially inner sides of the

bearing fitting walls

73 and 83 of the first end plate 70 and the second end plate 80 are opened as coaxially located through

holes

72 and 82, and these through

holes

72 and 82 are opened. Bearings (bearings) 21 and 22 are fitted to the inner peripheries of the defining

bearing fitting walls

73 and 83, respectively. The rotor 12 mainly composed of the hub shell 100 is rotatably supported by the wheel shaft 11 via the

bearings

21 and 22 so that the rotor 12 rotates about the wheel shaft 11 as the front wheel 5 rotates. ing. That is, the rotor 12 functions as a hub that rotatably supports the front wheel 5.

A permanent magnet 19 formed of, for example, ferrite is disposed on the inner periphery of the body 61 of the hub shell main body 60. The radius of curvature of the outer peripheral surface of the permanent magnet 19 is set to be equal to the radius of the inner peripheral surface of the body 61, and the permanent magnet 19 is directly connected to the inner periphery of the body 61 made of a magnetic material without a yoke. It arrange | positions in the closely_contact | adhered state, for example, is stuck with the adhesive agent etc. The permanent magnet 19 covers the entire outer peripheral surface of the stator 13 by arranging the permanent magnet 19 in a cylindrical shape along the inner peripheral surface of the body portion 61. The permanent magnet 19 is incorporated in the inner periphery of the body 61 in a state of being divided into a plurality in the circumferential direction.

The N-pole and S-pole magnetic poles are alternately magnetized along the circumferential direction on the inner circumferential surface of the permanent magnet 19 arranged in a cylindrical shape. Specifically, each of the N poles and the S poles is 14 poles, and a total of 28 poles are magnetized so that the N poles and the S poles are alternately arranged.

(Stator)
FIG. 4 is a perspective view of a stator constituting the hub dynamo 10.
As shown in FIG. 4, the stator 13 is configured by combining a claw pole type first stator unit 20 </ b> A and a second stator unit 20 </ b> B in the axial direction of the wheel shaft 11. 20A outputs an A-phase alternating current / voltage, and the second stator unit 20B outputs a B-phase alternating current / voltage.

As shown in FIG. 3, each of the

stator units

20A and 20B includes a coil 24 wound around the wheel shaft 11 via a bobbin (not shown), a coil 24 surrounding the coil 24, and a permanent magnet 19 on the outer periphery. And stator cores 26 having teeth 22 (22-1 and 22-2) having the number of poles corresponding to the number of magnetic poles.

The stator core 26 is disposed opposite to the central yoke 25 disposed on the inner periphery of the annular coil 24 and to one side (Q side) and the other side (P side) of the annular coil 24 in the axial direction. An inner peripheral portion is arranged on a pair of disk-shaped side yokes 21 (21-1, 21-2) magnetically coupled to one end and the other end of the central yoke 25, and an outer peripheral portion of the stator core 26. Teeth 22 opposed to the inner peripheral side of the permanent magnet 19 of the rotor 12 via a gap, and magnetically coupled to the outer peripheral portions of the side yokes 21-1 and 21-2 and arranged alternately in the circumferential direction. (22-1 and 22-2).

The teeth 22 (22-1 and 22-2) are formed integrally with the disk-shaped side yoke 21 (21-1 and 21-2), respectively. Then, the tooth 22-1 formed integrally with the side yoke 21-1 on one side (Q side) in the axial direction and the side yoke 21-2 on the other side (P side) in the axial direction are formed integrally. The teeth 22-2 are alternately arranged with a minute interval in the circumferential direction. Each side yoke 21-1, 21-2 has 14 teeth 22-1 and 22-2, and the number of poles of all teeth 22 (22-1 and 22-2) is the permanent magnet 19. Corresponds to the number of magnetic poles.

The side yokes 21 (21-1, 21-2) on the side of the axial direction Q and the side in the axial direction P having the teeth 22 (22-1 and 22-2) integrally have the same shape. The side yoke 21-1 on the axial direction Q side faces the teeth 22-1 toward the axial direction P, and the side yoke 21-2 on the axial direction P side places the teeth 22-2 in the axial direction Q side. Toward, they are combined with each other on the wheel shaft 11. A central hole 23 is formed in the center of the disk-shaped side yoke 21 (21-1, 21-2) to be fitted to the outer periphery of the wheel shaft 11. The center hole 23 allows the stator 13 to be connected to the wheel shaft. 11 is fixed.

(Combination of first stator unit and second stator unit)
As shown in FIG. 4, the first stator unit 20A and the second stator unit 20B are combined such that the positions of the teeth 22 of the

stator units

20A and 20B are shifted from each other in the circumferential direction by a predetermined angle α. As a result, two-phase alternating currents and voltages of phase A and phase B are output from the coils 24 of the

stator units

20A and 20B.

In the present embodiment, the number of poles of the teeth 22 (22-1 and 22-2) in the first and second stator units 20A (A phase) and 20B (B phase) is P, and the teeth 22 (22-1 and 22-1). The pitch angle of 22-2) is θ, and the circumferential direction of the teeth 22 (22-1 and 22-2) of the first stator unit 20A and the teeth (22-1 and 22-2) of the second stator unit 20B When the shift angle is α, the angle α is set so as to satisfy the following expression.
α = θ / 2 = (360 ° / P) / 2 (1)

As shown in FIG. 5, when the angle α satisfies the expression (1), the coil 24 of the first stator unit 20A and the coil 24 of the second stator unit 20B are rotated according to the rotation of the rotor 12. Output alternating currents and voltages that are 90 ° out of phase with each other in electrical angle.

In addition, in order to combine the first stator unit 20A and the second stator unit 20B in a relationship in which the phase is shifted in the circumferential direction by the shift angle α, circumferential positioning means (not shown) is provided. Further, as shown in FIG. 3, the side yoke 21-2 on the axial direction P side of the first stator unit 20A and the side yoke 21-1 on the axial direction Q side of the second stator unit 20B are adjacent to each other. Are arranged back to back.

(Regulation Department)
As shown in FIG. 3, a restricting portion that restricts the movement of the stator 13 in the axial direction is provided on portions of the wheel shaft 11 that are located on both sides in the axial direction of the stator 13. The restricting portion of the present embodiment includes a special nut 30 provided on the axial direction P side of the stator 13 in the wheel shaft 11 and a stator fixing member 37 provided on the axial direction Q side. The stator 13 is sandwiched and fixed at a fixed position in the axial direction by the special nut 30 and the stator fixing member 37 fixed to the outer periphery of the wheel shaft 11.

The special nut 30 includes a sleeve portion 30a formed on the axial direction P side, and a flange portion 30b formed on the axial direction P side and having an outer diameter enlarged with respect to the sleeve portion 30a. Then, the internal thread portion is fixed to the outer periphery of the wheel shaft 11 by screwing the internal thread portion formed on the inner periphery to the external thread portion of the wheel shaft 11.

The outer peripheral surface of the sleeve portion 30a is fixed to the inner periphery of the inner ring of the bearing 22 in which the outer ring is fitted to the bearing fitting wall 83 of the second end plate 80 by press fitting or the like. The flange portion 30b has an outer diameter larger than the inner diameter of the bearing 22, and an end face located on the axial direction P side is in contact with the inner ring of the bearing 22 in the axial direction. Thereby, the bearing 22 is mounted so that the outer ring side is rotatable around the wheel shaft 11.
On the other hand, the end face located on the axial direction P side in the flange portion 30 b is in contact with the inner peripheral portion of the stator 13 in the axial direction. As shown in FIG. 4, a groove 30 c is formed on the outer peripheral surface of the special nut 30 for drawing the end of the conductive wire constituting the coil 24 to the outside of the hub dynamo 10.

As shown in FIG. 3, a connector 40 is disposed outside the second end plate 80, and a conductive wire (not shown) of the coil 24 is introduced into the connector 40. The end portion of the conducting wire is led to the conducting wire lead-out portion 43 of the connector 40 through the groove 30c (see FIG. 4) of the special nut 30, and is led out of the hub dynamo 10 through the conducting wire lead-out portion 43. Yes. A sleeve portion 30 a of a special nut 30 is inserted through the inner peripheral portion of the connector 40, and the connector 40 is fixed to the wheel shaft 11 by a nut 46 via a washer 45.

A sleeve member 50 is provided on the wheel shaft 11 on the axial direction Q side of the stator fixing member 37. The sleeve member 50 is a cylindrical member having an internal thread portion formed on the inner peripheral surface, and is attached to the external thread portion of the wheel shaft 11 from the axial direction Q side. Specifically, the sleeve member 50 includes a sleeve main body 50a formed on the axial direction P side, and a flange portion 50b formed on the axial direction Q side and having an outer diameter enlarged relative to the sleeve main body 50a. .

The flange portion 50b is formed in a polygonal cylindrical shape, and the end surface on the axial direction P side is in contact with the inner ring of the bearing 21 on the first end plate 70 side in the axial direction. The sleeve main body 50a is formed in a cylindrical shape, and is fitted into the inner periphery of the inner ring of the bearing 21 on the first end plate 70 side. Specifically, the sleeve main body 50 a has an outer diameter set to be equal to or slightly larger than the inner diameter of the bearing 21, and is fixed to the inner periphery of the inner ring of the bearing 21 by press fitting or the like.

A cover 54 is attached to the outside of the first end plate 70 so as to cover the bearing 21 and the sleeve member 50. The cover 54 is a member formed in a bowl shape, and prevents water, dust beach, and the like from entering the rotor 12 from the outside. A nut 52 screwed to the wheel shaft 11 is arranged on the inner peripheral portion of the cover 54 to prevent the sleeve 50 from loosening.

(Power generation mechanism)
Below, the electric power generation method of the hub dynamo 10 is demonstrated.
When the front wheel 5 rotates, the rotor 12 connected to the front wheel 5 by the spoke 2 rotates around the wheel shaft 11 together with the front wheel 5, and the permanent magnet 19 rotates around the stator 13.

The first teeth 22-1 provided on the side yoke 21-1 on the axial direction Q side are provided on the side yoke 21-2 on the N pole and axial direction P side by the magnetic flux of the rotating permanent magnet 19. The state where the second tooth 22-2 is the S pole and the state where the first tooth 22-1 is the S pole and the second tooth 22-2 is the N pole are alternately repeated. Thereby, an alternating magnetic flux is generated in the stator core 26 of the A-phase first stator unit 20A and the stator core 26 of the B-phase second stator unit 20B, and this alternating magnetic flux causes the first and second stator units 20A, A current flows through each coil 24 of 20B to generate power.

In this power generation operation, the alternating current / voltage output from the coil 24 of the first stator unit 20A is out of phase with the alternating current / voltage output from the coil 24 of the second stator unit 20B. At the same time, there is no point where the alternating voltage drops to 0V.

In particular, the circumferential shift angle α between the teeth 22 (22-1 and 22-2) of the first stator unit 20A and the teeth 22 (22-1 and 22-2) of the second stator unit 20B is the teeth 22. Therefore, as shown in FIG. 5, the phase shift of the voltage waveform of the two-phase coil 24 of the A phase and the B phase is exactly 90 ° in electrical angle.

(Description of headlamp)
FIG. 6 is a diagram showing a plan view of the headlamp.
As shown in FIG. 6, the headlamp 4 includes a light stay 6, a head case 107, a front lens 103, a reflecting mirror 102, a light emitter 600 support substrate 104, and a control substrate 105.

The reflecting mirror 102 is provided on the inner surface of the head case 107. A light emitter 600 is disposed at the center of the reflecting mirror 102. Therefore, the reflecting mirror 102 reflects the light emitted from the light emitter 600, collects it with the front lens 103, and illuminates the front.

The front lens 103 seals the opening on the front surface of the head case 107. The front lens 103 is formed in a circular shape having the optical axis M of the light-emitting body 600 as an axis, and has a curved surface protruding forward and has a function as a condenser lens.

The light emitter 600 is turned on by electricity supplied from the control board 105. The light emitter 600 is, for example, an LED (Light Emitting Diode) or a filament light emitter.
The light emitter 600 is disposed at a substantially central portion of the reflecting mirror 102 and is fixed by the support substrate 104. The light emitter 600 is electrically connected to the control substrate 105 via the support substrate 104. The connection between the control board 105 and the light emitter 600 may be electrically connected via, for example, a lead wire, a printed board, a flexible board, or the like.

The control board 105 is connected to the output terminal 110 at one end of the hub dynamo 10 via the cable 20. The control board 105 acquires the power generated by the hub dynamo 10 via the cable 20. The control board 105 has a voltage doubler rectifier circuit 200 (described later). The voltage supplied from the hub dynamo 10 by the voltage doubler rectifier circuit 200 is multiplied by N and output to the light emitter 600. The light stay 6 is connected to the voltage doubler rectifier circuit 200.

The control board 105 is electrically connected to the light stay 6. The connection method between the cathode of the light emitter 600 and the light stay 6 may be connected via a lead wire, a printed board, a flexible board, or the like, or may be connected via a pattern on the control board 105.
The control board 105 is electrically connected to one output terminal 110 of the hub dynamo 10 serving as a power supply unit via the cable 20.

Hereinafter, the bicycle lighting device 150 will be described.
FIG. 7 is a diagram illustrating an example of a schematic configuration of the bicycle lighting device 150 according to the present embodiment.

The bicycle lighting device 150 includes a hub dynamo 10, a control unit 300, and a light emitter 600. The control unit 300 is provided on the control substrate 105, and the light emitter 600 is provided on the support substrate 104.

As shown in FIG. 7, the hub dynamo 10 has one output terminal 110 connected to the control unit 300 via the cable 20. The hub dynamo 10 has the other output terminal 120 connected to the front fork 3 which is a part of the frame of the bicycle 1.
The control unit 300 includes a voltage doubler rectifier circuit 200, a diode 205, and a diode 205. The voltage doubler rectifier circuit 200 is electrically connected to the output terminal 110 and converts the AC voltage generated by the hub dynamo 10 into DC.
The voltage doubler rectifier circuit 200 includes a diode 201, a diode 202, a capacitor 203 and a capacitor 204.
The diode 201 has an anode connected to the cathode of the diode 202. The cable 20 is connected to a connection point between the anode of the diode 201 and the cathode of the diode 202.

The capacitor 203 has one end connected to the cathode of the diode 201 and the other end connected to one end of the capacitor 204.
The other end of the capacitor 204 is connected to the anode of the diode 202. A connection point 250 between the other end of the capacitor 203 and one end of the capacitor 204 is connected to the light stay 6. The light stay 6 and the front fork 3 are electrically connected. That is, the output terminal 120 of the hub dynamo 10 and the connection point 250 are electrically connected via the light stay 6 and the front fork 3. That is, the intermediate voltage point of the voltage doubler rectifier circuit 200 and the output terminal 120 of the hub dynamo 10 are electrically connected via the frame of the bicycle 1. The connection point 250 is an intermediate voltage of the output voltage of the voltage doubler rectifier circuit 200. Further, the connection point 250 becomes an intermediate voltage point of the voltage doubler rectifier circuit 200.

The diode 205 has a cathode connected to one end of the capacitor 203 and an anode connected to the cathode of the diode 206.
The diode 206 has a cathode connected to the anode of the diode 205 and an anode connected to the other end of the capacitor 204. A connection point 400 between the cathode of the diode 206 and the anode of the diode 205 is connected to the connection point 250.
The light emitter 600 has a positive terminal (eg, anode) connected to one end of the capacitor 203 and a negative terminal (eg, cathode) connected to the other end of the capacitor 204.

Next, the operation of the bicycle lighting device 150 will be described.
Hub dynamo 10 outputs alternating voltage A shown in FIG.
The diode 201 rectifies one half cycle (positive polarity) of the alternating voltage A (or alternating voltage B), and supplies a positive rectified output, which is the rectified output, to the capacitor 203. The capacitor 203 is charged by the positive rectified output supplied from the diode 201.
The diode 202 rectifies the other half cycle (negative polarity) of the alternating voltage A (or alternating voltage B), and supplies a negative rectified output, which is the rectified output, to the capacitor 204. The capacitor 204 is charged by the negative rectified output supplied from the diode 202.

As the output voltage of the voltage doubler rectifier circuit 200, the capacitor 203 and the capacitor 204 are connected in series, so that a DC voltage approximately twice the peak value of the alternating voltage A (or the alternating voltage B) is obtained. That is, the luminous body 600 is applied with a DC voltage that is about twice the peak value of the alternating voltage (or alternating voltage B). The diode 205 and the diode 206 are diodes for preventing reverse voltage of the capacitor 203 and the capacitor 204.

As described above, the bicycle lighting device 150 of the present embodiment includes the voltage doubler rectifier circuit 200 and connects the intermediate voltage point of the voltage doubler rectifier circuit 200 to the light stay 6. Also. In the bicycle lighting device 150, one output terminal 110 of the hub dynamo 10 is connected to the voltage doubler rectifier circuit 200 via the cable 20, and the other output terminal 120 has a frame near the hub dynamo 10, such as a front fork. 3 is electrically connected. Thereby, even when the voltage doubler rectifier circuit 200 is provided, the hub dynamo 10 and the headlamp 4 can be connected in a one-wire system. Moreover, the bicycle lighting device 150 of the present embodiment connects the hub dynamo 10 and the headlamp 4 with the same one-wire system as in the prior art. Therefore, when a voltage doubler rectifier circuit is added to the conventional bicycle lighting device, it can be dealt with only by changing the circuit of the headlamp 4, and the die cost and cable cost of the connector portion can be reduced.

The present invention is not limited to the above-described embodiment described with reference to the drawings, and various modifications are conceivable within the technical scope.

Below, the modification of the bicycle illuminating device 150 of this embodiment is demonstrated. FIG. 8 is a diagram illustrating an example of a schematic configuration of the bicycle lighting device 150 according to the present modification.
In the bicycle lighting device 150 of this modification, the hub dynamo 10 has one output terminal 110 connected to the front fork 3. In the hub dynamo 10, the other output terminal 120 is connected to the connection point 250 and the connection point 400 via the cable 20.
A light stay 6 is connected to a connection point between the anode of the diode 201 and the cathode of the diode 202.
Thus, in the bicycle lighting device 150 of this modification, the voltage doubler rectifier circuit 200 and one output terminal 110 of the hub dynamo 10 that is a power supply unit are electrically connected via the frame of the bicycle 1. The Thereby, even when the voltage doubler rectifier circuit 200 is provided, the hub dynamo 10 and the headlamp 4 can be connected in a one-wire system.

In the above-described embodiment, the output of the voltage doubler rectifier circuit 200 is connected to the light emitter 600. However, the present invention is not limited to this. For example, a voltage control unit that limits the output voltage of the voltage doubler rectifier circuit 200 may be provided between the output of the voltage doubler rectifier circuit 200 and the light emitter 600. The voltage control unit is, for example, a limiter circuit or an overvoltage protection circuit. For example, an external illuminance detection circuit may be provided between the output of the voltage doubler rectifier circuit 200 and the light emitter 600. The external illuminance detection circuit measures external illuminance with an optical sensor or the like, and supplies power to the light emitter 600 based on the illuminance.

In the above-described embodiment, the output of the voltage doubler rectifier circuit 200 is about twice that of the hub dynamo 10, but the present invention is not limited to this. For example, a diode and a capacitor of the voltage doubler rectifier circuit 200 may be further added, and the output of the voltage doubler rectifier circuit 200 may be boosted to a voltage N (N is a positive integer) times the output of the hub dynamo 10.

In the above-described embodiment, the hub dynamo 10 connects the output terminal 120 to the front fork 3, but is not limited thereto. That is, the hub dynamo 10 only needs to have the output terminal 120 connected to the frame, and the connection location in the frame is not particularly limited.

In the above-described embodiment, the intermediate voltage point (connection point 250) of the voltage doubler rectifier circuit 200 is connected to the light stay 6. However, the present invention is not limited to this. That is, the hub dynamo 10 only needs to connect the intermediate voltage point (connection point 250) of the voltage doubler rectifier circuit 200 to the frame.

DESCRIPTION OF SYMBOLS 1 Bicycle 2 Spoke 3 Front fork 4 Headlamp 5 Front wheel 6 Light stay 7 Fixture 10 Hub dynamo 11 Wheel shaft 12 Rotor 13 Stator 19 Permanent magnet 20A First stator unit 20B

Second stator unit

21, 22 Bearing 21- 1, 21-2 Yoke 22-1, 22-2 Teeth 23 Center hole 24 Coil 25 Center part yoke 26 Stator core 30

Special nut

30a,

50a Sleeve part

30b, 50b, 62, 75 Flange part 30c Groove 37 Stator fixing member 40 Connector 43 Lead wire drawing part 45

Washer

46, 52 Nut 50 Sleeve member 54 Cover 60 Hub shell

main body

62, 75 Flange part 61 Body 62a Axial inner flange plate 62b Axial outer flange plate 70

First end plates

71, 81

Side wall

7 , 82 Through

holes

73, 83 Bearing fitting wall 80 Second end plate 84 Bearing holding wall 100 Hub shell 107 Head case 103 Front lens 102 Reflective mirror 104 Support substrate 105 Control substrate 200 Voltage doubler rectifier circuit 300

Control units

201, 202, 205, 206

Diode

203, 204 Capacitor 600 Light emitter

Claims

A power supply that generates electricity as the bicycle travels;
A light emitter that emits light by power generation of the power supply unit;
A voltage doubler rectifier circuit that is electrically connected to one output terminal of the power supply unit and converts an alternating voltage generated by the power supply unit into a direct current
An intermediate voltage point of the voltage doubler rectifier circuit, electrically connected to the other output terminal of the power supply unit,
Have
Any one of the electrical connection between the voltage doubler rectifier circuit and one output terminal of the power supply unit and the electrical connection between the intermediate voltage point of the voltage doubler rectifier circuit and the other output terminal of the power supply unit Bicycle lighting device electrically connected via a bicycle frame.
The bicycle lighting device according to claim 1, wherein the power supply unit is a hub dynamo.
The bicycle lighting device according to claim 1 or 2, wherein the light emitter is an LED.
The hub dynamo includes a rotor that rotates with wheels,
A non-rotatable fixed to a wheel shaft that rotatably supports the wheel, and a stator disposed on the inner peripheral side of the rotor,
By rotating the rotor, the alternating current output from the stator coil is rectified and supplied to the light emitter,
The bicycle lighting device according to claim 2, wherein the stator is provided with a two-phase coil that outputs an alternating current having a phase shift.