JP6698080B2 - Bicycle lighting device - Google Patents

Description

The present invention relates to a bicycle lighting device.
The present application claims priority based on Japanese Patent Application No. 2015-119217 filed in Japan on June 12, 2015, and the content thereof is incorporated herein.

As shown in FIG. 9, a conventional bicycle lighting device includes a dynamo 800 and a headlight 900 provided at a front portion (with respect to a traveling direction) of a bicycle frame. The headlight 900 includes a rectifier circuit 910 that rectifies the electric power generated by the dynamo 800, and a light emitter 920 that is turned on by the 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. Further, the negative electrode terminal (cathode) of the light emitting body 920 is similarly connected to the frame of the bicycle. Therefore, the connection between the dynamo 800 and the headlight 900 is electrically connected by one cable (1-wire type) and the bicycle frame.

  In the conventional bicycle lighting device described above, the output voltage of the dynamo 800 is low when the bicycle is traveling at a low speed, and thus the illuminance (brightness) of the light emitter 920 may not be sufficient. Therefore, it has been proposed to increase the output voltage of the dynamo by providing the 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 voltage between the output terminal 802 of the dynamo and the negative terminal of the light emitter 920 does not match. Therefore, if the negative terminal of the light emitting body 920 is connected to the bicycle frame as in the conventional case, a new cable is required to connect the output terminal 802 of the dynamo to the voltage doubler rectifier circuit, which is higher than the conventional case. It becomes a cost.

  The present invention provides a bicycle lighting device in which a dynamo and a headlight are connected by a one-wire system even when a voltage doubler rectifier circuit is provided.

According to one embodiment of the present invention, a power source portion that generates power in response to running of a bicycle, a light-emitting body that emits light by power generation of the power source portion, and one output terminal of the power source portion that is electrically connected to the power source portion A voltage doubler rectifier circuit that rectifies the AC voltage that is generated N times and rectifies it, 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 the electrical connection between the voltage doubler rectifier circuit and one output terminal of the power source unit and 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 either The lighting device for a bicycle is electrically connected via a frame of the bicycle.

Further, one embodiment of the present invention is the bicycle lighting device described above, in which the potential of the frame is obtained by electrically connecting the intermediate voltage point of the voltage doubler rectifier circuit and the other output terminal of the power supply unit. To the potential of the intermediate voltage point .

One aspect of the present invention is the bicycle lighting device described above, wherein the voltage doubler rectifier circuit has a first diode whose anode is connected to one output terminal of the power supply unit and a cathode which is the first diode. A second diode connected to the anode of the diode, a first capacitor having one end connected to the cathode of the first diode, one end connected to the other end of the first capacitor, and the other end of the second diode A second capacitor connected to the anode, and the light emitter has a positive terminal connected to one end of the first capacitor, a negative terminal connected to the other end of the second capacitor, and the intermediate voltage point is , A connection point between the other end of the first capacitor and one end of the second capacitor .

Moreover, 1 aspect of this invention is the above-mentioned bicycle lighting device, Comprising: The said power supply part is a hub dynamo, The said hub dynamo is a rotor which rotates with a wheel, and the wheel which supports the said wheel rotatably. A stator that is non-rotatably fixed to a shaft and that is disposed on the inner peripheral side of the rotor, and that rotates the rotor to rectify an alternating current output from a coil of the stator and supply the alternating current to the light emitter. The stator is provided with a two-phase coil that outputs an alternating current having a phase shift.

  In the bicycle lighting device described above, the dynamo and the light emitter can be connected in a one-wire system even when the double lighting rectifier circuit is provided.

1 is a side view of a bicycle equipped with a bicycle lighting device 150 according to an embodiment of the present invention. It is a side view of hub dynamo 10 in an embodiment of the present invention. It is a sectional view of hub dynamo 10 in an embodiment of the present invention. It is a perspective view of a stator which constitutes hub dynamo 10 in an embodiment of the present 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 a schematic structure of the bicycle lighting apparatus 150 in embodiment of this invention. It is a figure which shows an example of a schematic structure of the illuminating device 150 for bicycles of this modification. It is a figure which shows an example of a circuit structure of the conventional bicycle illuminating device.

Embodiments of the present invention will be described below 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, a hub dynamo 10 and a headlight 4 as a power source that generates power according to the running 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 headlight 4 of the bicycle 1 will be described.

(Attachment Mode of Bicycle Lighting Device 150)
A front wheel 5 of the bicycle 1 is rotatably supported by a front fork 3 forming a part of a frame via a wheel shaft 11. Both sides of the wheel shaft 11 are non-rotatably fastened and fixed to the front fork 3 by nuts (not shown) or the like. The hub dynamo 10 is mounted coaxially with the wheel shaft 11 on most of the axial center of the wheel shaft 11. The hub dynamo 10 supplies electric power to the headlamp 4 arranged 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 a screw. 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 non-rotatably attached to the wheel shaft 11 while being connected to the spokes 2 of the front wheel 5 and rotating around the wheel shaft 11 together with the front wheel 5, while being located 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 will be simply referred to as the axial direction, the direction orthogonal to the axial direction will be referred to as the radial direction, and the direction along the central axis O will be referred to as the circumferential direction. A male screw portion is formed on at least a portion of the wheel shaft 11 located axially outside of a 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 sectional view of the hub dynamo 10.
As shown in FIGS. 2 and 3, the rotor 12 is mainly composed of the 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 close the axial end openings of the body portion 61.

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

  An opening on the other axial Q side (right side in FIG. 2) of the body portion 61 is closed from the time of manufacture by a first end plate 70 formed integrally with the body 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 body 60 and the second end plate 80, which is separate from the hub shell body 60, are manufactured by press-molding a magnetic metal plate (mainly an iron plate) having a constant thickness.

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

  As shown in FIG. 1, the support holes 63 are engaged with the inner ends of the plurality of spokes 2 extending from the rim 5a of the front wheel 5 toward the inner diameter side. In addition, the support holes 63 of the left and right flange portions 62 are arranged with a phase shift of a half pitch.

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

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

  Radial 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 through holes 72 and 82 which are coaxially positioned. Bearings 21 and 22 are fitted to the inner peripheries of the defined bearing fitting walls 73 and 83, respectively. The rotor 12, which mainly includes the hub shell 100, is rotatably supported by the wheel shaft 11 via 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 wheels 5.

  A permanent magnet 19 made of, for example, ferrite is arranged on the inner circumference of the body portion 61 of the hub shell 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 attached to the inner periphery of the body 61 made of a magnetic material without a yoke. They are arranged in close contact with each other, and are attached by, for example, an adhesive. By disposing the permanent magnet 19 in a cylindrical shape along the inner peripheral surface of the body portion 61, the permanent magnet 19 covers the entire outer peripheral surface of the stator 13. The permanent magnet 19 is incorporated in the inner circumference of the body 61 in a state of being divided into a plurality of pieces in the circumferential direction.

  Magnetic poles of N and S poles are alternately magnetized along the circumferential direction on the inner peripheral surface of the cylindrically arranged permanent magnet 19. Specifically, 14 N poles and 14 S poles in total are magnetized so that a total of 28 magnetic poles are alternately arranged.

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

  As shown in FIG. 3, each stator unit 20A, 20B includes a coil 24 wound around a wheel shaft 11 in an annular shape via a bobbin (not shown), a coil 24 surrounding the coil 24, and a permanent magnet 19 on the outer peripheral portion. And a stator core 26 having teeth 22 (22-1, 22-2) facing each other and having the number of poles corresponding to the number of magnetic poles.

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

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

  The side yokes 21 (21-1, 21-2) on the axial direction Q side and the axial direction P side that integrally have the teeth 22 (22-1, 22-2) have the same shape. The side yoke 21-1 on the axial Q side faces the teeth 22-1 toward the axial direction P side, and the side yoke 21-2 on the axial direction P side moves the teeth 22-2 toward the axial direction Q side. Both are combined with one another on the wheel axle 11. At the center of the disk-shaped side yoke 21 (21-1, 21-2), a center hole 23 that fits around the outer circumference of the wheel shaft 11 is formed. It is fixed at 11.

(A combination of the first stator unit and the second stator unit)
As shown in FIG. 4, the first stator unit 20A and the second stator unit 20B are combined by shifting the positions of the teeth 22 of each of the stator units 20A and 20B by a predetermined angle α in the circumferential direction. As a result, the alternating currents and voltages of the two phases, the A phase and the B phase, which are out of phase with each other, 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, 22-2) in the first and second stator units 20A (A phase), 20B (B phase) is P, and the teeth 22 (22-1, 22-2) is the pitch angle, and the teeth 22 (22-1, 22-2) of the first stator unit 20A and the teeth (22-1, 22-2) of the second stator unit 20B are in the circumferential direction. The angle α is set to satisfy the following equation, where α is the deviation angle of.
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 move in accordance with the rotation of the rotor 12. Outputs alternating current and voltage 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, a side yoke 21-2 on the axial direction P side of the first stator unit 20A and a side yoke 21-1 on the axial direction Q side of the second stator unit 20B that are adjacent to each other. Are placed back to back.

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

  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 female screw portion formed on the inner periphery is fixed to the outer periphery of the wheel shaft 11 by screwing onto the male screw portion of the wheel shaft 11.

The outer peripheral surface of the sleeve portion 30a is fixed to the inner circumference 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 outer diameter of the flange portion 30b is larger than the inner diameter of the bearing 22, and the end surface located on the axial direction P side is in axial contact with the inner ring of the bearing 22. 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 surface of the flange portion 30b located on the axial direction P side is in axial contact with the inner peripheral portion of the stator 13. As shown in FIG. 4, a groove 30c is formed on the outer peripheral surface of the special nut 30 so as to draw the end portion of the conductive wire forming the coil 24 to the outside of the hub dynamo 10.

  As shown in FIG. 3, a connector 40 is arranged outside the second end plate 80, and a conductor wire (not shown) of the coil 24 is introduced into the connector 40. The end portion of the conductor wire is guided to the conductor wire lead-out portion 43 of the connector 40 through the groove 30c (see FIG. 4) of the special nut 30, and is drawn out of the hub dynamo 10 through the conductor wire lead-out portion 43. There is. The sleeve portion 30a of the special nut 30 is inserted into the inner peripheral portion of the connector 40, and the connector 40 is fixed to the wheel shaft 11 by the nut 46 via the 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 tubular member having a female screw portion formed on the inner peripheral surface thereof, and is joined to the male screw portion of the wheel shaft 11 from the axial direction Q side. Specifically, the sleeve member 50 includes a sleeve 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 with respect to the sleeve body 50a. .

  The flange portion 50b is formed in a polygonal tubular shape, and the end surface on the axial direction P side is in axial contact with the inner ring of the bearing 21 on the first end plate 70 side. The sleeve body 50a is formed in a cylindrical shape, and is fitted into the inner circumference of the inner ring of the bearing 21 on the first end plate 70 side. Specifically, the outer diameter of the sleeve body 50a is set to be equal to or slightly larger than the inner diameter of the bearing 21, and is fixed to the inner circumference 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 bowl-shaped member and prevents water, dust beach, etc. from entering the inside of the rotor 12 from the outside. A nut 52 screwed to the wheel shaft 11 is provided on the inner peripheral portion of the cover 54 to prevent the sleeve 50 from loosening.

(Power generation mechanism)
The power generation method of the hub dynamo 10 will be described below.
When the front wheel 5 rotates, the rotor 12 connected to the front wheel 5 by the spokes 2 rotates around the wheel shaft 11 together with the front wheel 5, and the permanent magnet 19 rotates around the stator 13.

  Due to the magnetic flux of the rotating permanent magnet 19, the first teeth 22-1 provided on the side yoke 21-1 on the axial direction Q side are provided on the N pole and on the side yoke 21-2 on the axial direction P side. A state in which the second teeth 22-2 are S poles, a state in which the first teeth 22-1 are S poles, and a state in which the second teeth 22-2 are N poles are alternately repeated. As a result, 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 the alternating magnetic flux causes the first and second stator units 20A, 20A. Electric current is generated by passing a current through each coil 24 of 20B.

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

  In particular, the circumferential deviation angle α between the teeth 22 (22-1, 22-2) of the first stator unit 20A and the teeth 22 (22-1, 22-2) of the second stator unit 20B is the teeth 22. As shown in FIG. 5, the phase shift of the voltage waveforms of the two-phase coils 24 of the A phase and the B phase is exactly 90° in electrical angle because the pitch angle θ is set to 1/2.

(Explanation of headlight)
FIG. 6 is a diagram showing a plan view of the headlight.
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 arranged in the center of the reflecting mirror 102. Therefore, the reflecting mirror 102 reflects the light emitted from the light emitting body 600, collects it by the front lens 103, and illuminates the front side.

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

The light emitting body 600 is lit by electricity supplied from the control board 105. The light emitting body 600 is, for example, an LED (Light Emitting Diode) or a filament light emitting body.
The light-emitting body 600 is arranged at a substantially central portion of the reflecting mirror 102, and is fixed by the supporting substrate 104. The light emitter 600 is electrically connected to the control board 105 via the support board 104. The control board 105 and the light emitting body 600 may be electrically connected to each other, for example, via 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 electric power generated by the hub dynamo 10 via the cable 20. The control board 105 has a voltage doubler rectifier circuit 200 (described later), and the voltage doubler rectifier circuit 200 doubles the voltage supplied from the hub dynamo 10 by N and outputs the voltage to the light emitter 600. Further, 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 cathode of the light emitting body 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 of the control board 105.
The control board 105 is electrically connected via a cable 20 to one output terminal 110 of the hub dynamo 10 that serves as a power supply unit.

The bicycle lighting device 150 will be described below.
FIG. 7 is a diagram showing an example of a schematic configuration of the bicycle lighting device 150 according to the present embodiment.

  The bicycle lighting device 150 includes the 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 emitting body 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 other output terminal 120 of the hub dynamo 10 is 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 anode of the diode 201 is connected to the cathode of the diode 202. The cable 20 is connected to the 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 cathode of the diode 205 is connected to one end of the capacitor 203, and the anode thereof is 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. The 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-emitting body 600 has a positive terminal (for example, an anode) connected to one end of the capacitor 203 and a negative terminal (for example, a cathode) connected to the other end of the capacitor 204.

Next, the operation of the bicycle lighting device 150 will be described.
The hub dynamo 10 outputs the alternating voltage A shown in FIG. 5 to the control unit 300.
The diode 201 rectifies one half cycle (positive polarity) of the alternating voltage A (or the alternating voltage B), and supplies the 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 the alternating voltage B), and supplies the negative rectified output that is the rectified output to the capacitor 204. The capacitor 204 is charged by the negative rectified output supplied from the diode 202.

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

  As described above, the bicycle lighting device 150 of the present embodiment has 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 is a frame near the hub dynamo 10, for example, a front fork. 3 electrically connected. As a result, even when the voltage doubler rectifier circuit 200 is provided, the hub dynamo 10 and the headlight 4 can be connected by a one-wire system. In addition, the bicycle lighting device 150 of the present embodiment connects the hub dynamo 10 and the headlight 4 in the same one-wire system as the conventional one. 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 headlight 4, and the die cost of the connector part and the cable cost can be reduced.

  The present invention is not limited to the above-described embodiment described with reference to the drawings, and various modifications can be considered within the technical scope thereof.

Hereinafter, a modified example of the bicycle lighting device 150 of the present embodiment will be described. FIG. 8: is a figure which shows an example of a schematic structure of the illuminating device 150 for bicycles of this modification.
In the bicycle lighting device 150 of the present modified example, one output terminal 110 of the hub dynamo 10 is connected to the front fork 3. The other output terminal 120 of the hub dynamo 10 is connected to the connection point 250 and the connection point 400 via the cable 20.
The light stay 6 is connected to a connection point between the anode of the diode 201 and the cathode of the diode 202.
As described above, in the bicycle lighting device 150 of the present modification, the voltage doubler rectifier circuit 200 and one output terminal 110 of the hub dynamo 10, which is the power supply unit, are electrically connected via the frame of the bicycle 1. It As a result, even when the voltage doubler rectifier circuit 200 is provided, the hub dynamo 10 and the headlight 4 can be connected by a one-wire system.

  Further, in the above-described embodiment, the output of the voltage doubler rectifier circuit 200 is connected to the light emitter 600, but the present invention is not limited to this. For example, a voltage controller 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. Further, 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 the external illuminance with an optical sensor or the like, and supplies power to the light emitter 600 based on the illuminance.

  Further, in the above-described embodiment, the output of the voltage doubler rectifier circuit 200 is approximately twice the output of the hub dynamo 10, but the output 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.

  Further, in the above-described embodiment, the hub dynamo 10 connects the output terminal 120 to the front fork 3, but the present invention is not limited to this. 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.

  Further, 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, but the invention is not limited to this. That is, in the hub dynamo 10, the intermediate voltage point (connection point 250) of the voltage doubler rectifier circuit 200 may be connected to the frame.

  In the bicycle lighting device described above, the dynamo and the light emitter can be connected in a one-wire system even when the double lighting rectifier circuit is provided.

1 Bicycle 2 Spoke 3 Front Fork 4 Headlight 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 nuts 30a, 50a Sleeve parts 30b, 50b, 62, 75 Flange part 30c Groove 37 Stator fixing member 40 Connector 43 Conductor Lead Out Part 45 Washers 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 Walls 72, 82 through holes 73, 83 bearing fitting wall 80 second end plate 84 bearing retaining wall 100 hub shell 107 head case 103 front lens 102 reflecting mirror 104 supporting substrate 105 control substrate 200 voltage doubler rectifying circuit 300 control units 201, 202 , 205, 206 Diodes 203, 204 Capacitor 600 Light emitter

Claims (4)

A power supply that generates power according to the running of the bicycle,
A light-emitting body 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 that multiplexes and rectifies the AC voltage generated by the power supply unit.
An intermediate voltage point of the voltage doubler rectifier circuit, which is 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 source unit and 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 either A lighting device for a bicycle that is electrically connected through a bicycle frame. The potential of the frame is set to the potential of the intermediate voltage point by electrically connecting the intermediate voltage point of the voltage doubler rectifier circuit and the other output terminal of the power supply unit.
The bicycle lighting device according to claim 1. The voltage doubler rectifier circuit,
A first diode whose anode is connected to one output terminal of the power supply section;
A second diode whose cathode is connected to the anode of said first diode;
A first capacitor whose one end is connected to the cathode of the first diode;
A second capacitor having one end connected to the other end of the first capacitor and the other end connected to the anode of the second diode;
Have
The light emitter has a positive terminal connected to one end of the first capacitor and a negative terminal connected to the other end of the second capacitor,
The intermediate voltage point is a connection point between the other end of the first capacitor and one end of the second capacitor,
The bicycle lighting device according to claim 1 or 2. The power supply unit is a hub dynamo,
The hub dynamo is a rotor that rotates with wheels,
A non-rotatably fixed to a wheel shaft that rotatably supports the wheel, and a stator disposed on the inner peripheral side of the rotor,
The rotation of the rotor is configured to rectify an alternating current output from the coil of the stator and supply the alternating current to the light emitter,
The bicycle lighting device according to any one of claims 1 to 3, wherein the stator is provided with a two-phase coil that outputs an alternating current having a phase shift.

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