JP4229768B2 - Bicycle hub dynamo - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bicycle hub dynamo provided on a front wheel or the like of a bicycle.
[0002]
[Prior art]
As a conventional bicycle hub dynamo, a front wheel hub case in which magnets having alternating north and south poles are fixed to the inner surface is rotatably supported on an axle projecting from the hub case, and the axle is located in the hub case. In addition, a power generation coil is attached to the vehicle, while an output terminal that is located outside the hub case and is fed to the axle from the power generation coil is known. In this hub dynamo, both ends of an axle having a circular cross section protruding from the hub case are inserted into a U-shaped mounting groove of the front fork of the bicycle, and a nut is screwed into a screw portion of the axle to be attached to the bicycle. And when attaching to the fork, a toothed washer is interposed between the nut and the fork, and when the nut is tightened, the frame is shaved off by the tooth of the washer to conduct to the frame part and take the ground. .
[0003]
Further, the grounding can be taken by electrically connecting the grounding on the headlamp side and the frame.
[0004]
However, when the bicycle frame is grounded with a toothed washer as described above, if the nut for attaching the hub case is weakly tightened or the frame is thickly painted, the washer will not paint the frame even if the nut is tightened. There was a problem that it was impossible to break through, grounding could not be surely taken, and power could not be supplied to the headlamp.
[0005]
[Patent Document 1]
JP2001-80558 (FIG. 4)
[0006]
[Problems to be solved by the invention]
An object of the present invention is to provide a bicycle hub dynamo capable of reliably grounding and capable of reliably supplying power.
[0007]
[Means for Solving the Problems]
As means for solving the above problems,
A wheel hub case with fixed magnets;
Both ends protrude from the hub case, and an axle that rotatably supports the hub case;
A power generating coil located in the hub case and fixed to the axle;
A feeding terminal fed by the feed line from the generator coil located outside the hub case, and a ground terminal provided outside the hub case,
A sleeve having electrical conductivity and concentrically provided with the axle, and electrically connecting the ground of the power generation coil and the ground terminal;
Provided outside the hub case, comprising a power supply socket for holding the power supply terminal and the ground terminal,
The power feeding socket is attached by being sandwiched between a hub case and a nut by a nut for attaching the hub case to the axle .
[0008]
With the above configuration, the power generation coil fixed to the axle generates power by the rotation of the magnet fixed to the hub case by the rotation of the wheel. Power supply from the power generation coil to electrical components such as a headlamp is performed by a power supply terminal provided outside the hub case, and grounding is performed by a ground terminal provided outside the hub case. As described above, since the ground terminal is provided separately from the power supply terminal, the bicycle frame is not damaged and reliable conduction can be achieved.
Further, when power is supplied to the electrical component, the connection to the lead wire is gathered in one place by the power supply socket, so that there is an effect that the connection is easy.
Further, when the hub case is attached with a nut, the power supply socket can be easily attached by sandwiching the power supply socket between the hub case and the nut and then tightening with the nut.
Furthermore, since the ground of the power generating coil and the ground terminal are electrically connected by the sleeve, the ground can be processed along the axle, and there is no need to provide a ground wire, and the wiring process can be easily performed.
[0015]
And a terminal plate which is insulated and attached to the outer periphery of the sleeve and accommodates the power supply terminal . The terminal plate is provided with an insulating wall for insulating the sleeve, and the notch formed in the insulating wall And the power supply terminal is electrically connected through a power supply line.
[0016]
With the above configuration, since the sleeve, which is a ground, and the power supply terminal are reliably insulated by the insulating wall, power can be reliably supplied without short-circuiting.
[0017]
Then, an insulating lid that covers the power supply terminal by covering the terminal plate is provided, and a conductive ring that electrically connects the sleeve and the ground terminal is provided outside the lid. It is characterized by.
[0018]
With the above configuration, the ground of the power generation coil can be connected to the ground terminal with a simple configuration, and can be reliably insulated from the power supply terminal.
[0019]
Further, the power supply terminal is formed with a circumferential portion formed concentrically with the axle, and a power feed piece partially extending from the circumferential portion, and the ground terminal is formed concentrically with the axle. The formed circumferential portion and a ground piece partially extending from the circumferential portion are formed, and the terminal plate is formed with notches into which the power feeding piece and the ground piece are respectively fitted. And
[0020]
With the above configuration, the power feeding piece and the grounding piece are respectively fitted in the notches of the terminal plate and attached by the terminal plate. When inserting the power feeding connector into the power feeding piece and the grounding piece , even if the terminal plate is rotated by the rotation of the power generating coil, the power feeding terminal and the ground terminal rotate together, so the power feeding connector Easy to install when inserting.
[0021]
Further, the terminal plate is integrally formed with a frame surrounding the power feeding piece of the power feeding terminal and the grounding piece of the ground terminal.
[0022]
Further, a power supply lead wire and a ground lead wire connected to the power supply piece and the ground piece are provided in one power supply cap, and when the power supply cap is fitted to the frame body, each lead wire is It is electrically connected.
[0024]
With the above configuration, when the power supply cap is inserted into the power supply socket, the frame surrounds the connector, so that it becomes a guide when inserting. Further, electrical connection can be made by a simple method.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention are shown in FIGS. 1 to 6, and will be described below with reference to these drawings.
[0028]
Reference numeral 1 denotes a front hawk of a bicycle, and a headlamp 3 is attached via an attachment piece 2. A U-shaped mounting groove (not shown) having a lower opening is formed below the front fork 1 as shown in FIG. 1, and a front wheel 4 having a hub dynamo at the center is formed in the mounting groove. 5 is attached. The configuration of the hub dynamo will be described below.
[0029]
Reference numeral 6 denotes a hub case connected to the rim 8 of the tire 7 of the front wheel 4 via a spoke 9, as shown in FIG. 1, a cylindrical case 10 having one end (left side) opened, and a cap covering the opening of the case 10 11. A magnet 12 having N poles and S poles alternately is fixed to the inner surface of the hub case 6 via a yoke, and the hub case 6 serves as a rotor. The hub case 6 has recesses (the case 10 side is not shown) into which the outer ring of the ball bearing 13 is inserted, and the hub case 6 is sandwiched by the ball bearing 13 to move in the left-right direction. It is to be prevented.
[0030]
Reference numeral 14 denotes an axle that protrudes through the hub case 6 with both ends projecting from the hub case 6. The shaft 15 is threaded over the entire length, and the sleeve 16 is die-cast molded with both ends projecting from the shaft 15. It is formed with. At one end (left side) of the hub case 6 is attached a power supply socket 18 that is sandwiched between the hub case 6 by a nut 17 that is screwed to the axle 14 and that supplies power to the headlamp 3. ing. Steps 19 into which the inner rings of the ball bearings 13 are press-fitted are formed at both ends of the sleeve 16, and the axle 14 rotatably supports the hub case 6 via the ball bearings 13. A power generation coil 21 surrounded by an iron core 20 serving as a stator is fixed between the ball bearings 13 of the axle 14 so as to face the magnet 12.
[0031]
Further, the sleeve 16 is formed with a wiring groove 22 extending from the end where the ball bearing 13 is provided to the vicinity of the power generation coil 21 to the vicinity of the power generation coil 21, and the power supply line 23 is connected to the hub case from the power generation coil 21 through the wiring groove 22. 6 is arranged outside. The power supply line 23 leads the power from the power generation coil 21 to the power supply socket 18.
[0032]
Reference numeral 24 denotes an earth lead plate that is provided in the power generation coil 21 and serves as a ground for the power generation coil 21. The ground lead plate 24 is electrically connected to the power supply socket 18 through the conductive axle 14 and the sleeve 16.
[0033]
Reference numerals 25 and 26 denote power supply lead wires and ground lead wires for supplying power from the power supply socket 18 to the headlamp 3. The lead wires 25 and 26 are respectively provided on the power supply side and the ground side. Each lead wire 25, 26 is provided with a resin coating on a copper wire. Further, a resin terminal cap 27 to be inserted into the power supply socket 18 is provided on the power supply socket 18 side of the lead wires 25 and 26. As shown in FIG. In order to enable power supply from the socket 18 for use, the tip of the copper wire is exposed from the coating, bent outside the terminal cap 27, and temporarily fixed.
[0034]
Next, the configuration of the power supply socket 18 will be described in detail.
[0035]
A resin terminal plate 28 is inserted through the sleeve 16 and accommodates a power supply terminal 36 to be described later. The terminal plate 28 has a circumferential shape for storing a power supply terminal 36 to be described later. A groove is formed by an outer peripheral wall 29 formed on the outer periphery of the terminal plate 28 and an insulating wall 30 surrounding the outer periphery of the sleeve 16. A notch 32 for inserting the power supply line 31 is formed in a part of the insulating wall 30. Further, a frame 33 for surrounding and fitting the terminal cap 27 when connecting to the terminal cap 27 is integrally formed at the upper end of the terminal plate 28, and the frame 33 has a power supply terminal to be described later. Cutouts 34 and 35 are formed for fitting the power feeding piece 38 and the grounding piece 43 of the grounding terminal 41, respectively.
[0036]
Reference numeral 36 denotes a conductive power supply terminal accommodated in the terminal plate 28. The power supply terminal 36 is formed in a ring shape and has a circumferential portion 37 to which the power feed line 31 is electrically connected, and the circumferential portion. 37 and a power supply piece 38 extending from the frame 33 to the frame 33 side. The feeding piece 38 is fitted in the notch 34 and is arranged so that the tip is located inside the frame 33.
[0037]
39 is a resin-made ring-shaped lid that covers a groove in which the power feeding terminal 36 of the terminal plate 28 is accommodated, and the lid 39 is located between the outer peripheral wall 29 and the insulating wall 30. It is fitted and covered. Further, the lid body 39 forms an extending portion 40 that engages with the frame body 33, and is engaged with the frame body 33 to be prevented from rotating.
[0038]
Reference numeral 41 denotes a ground terminal which is sandwiched and accommodated between a lid 39 applied to the terminal plate 28 and a ring 44 which will be described later. The ground terminal 41 is electrically conductive and electrically connected to the ring 44. Connected. The ground terminal 41 includes a circumferential portion 42 formed in a ring shape so as to surround the sleeve 16 in the terminal plate 28, and a ground piece 43 extending from the circumferential portion 42 toward the frame 33. The grounding piece 43 is formed so as to be separated from the inside of the frame 33 so as not to contact the power feeding piece 38.
[0039]
44 is a circumferential ring having conductivity and sandwiching the ground terminal 41 with the lid 39. The ring 44 is a protrusion that fits into a notch 35 into which the ground piece 43 is fitted. A portion 45 is formed. The ring 44 is electrically connected to the axle 14, the sleeve 16, and the ground terminal 41, and the ground lead plate 24 of the power generation coil 21 and the ground piece 43 disposed in the power supply socket 18 are electrically connected. It is in a conductive state.
[0040]
In the hub dynamo having the above-described configuration, the axle 14 is inserted into the mounting groove of the front fork 1 as shown in FIG. 5, and the bicycle nut 5 is attached to the axle 14 protruding laterally from the front fork 1 via the power supply socket 18 and the nut 17. Installed by screwing. When the terminal cap 27 is inserted into the power supply socket 18, the power supply piece 38 and the power supply lead wire 25 are connected, and the ground piece 43 and the ground lead wire 26 are connected to each other. The electric power generated by is supplied to the headlamp 3.
[0041]
In the above embodiment, the headlamp 3 is supplied with electric power. However, the present invention is not limited to this, and electrical components such as a taillight and a speedometer may be connected.
[0042]
Next, another embodiment will be described with reference to FIG.
[0043]
The same parts as those in the above-described embodiment are designated by the same reference numerals and the description thereof is omitted.
[0044]
46 is an earth terminal that is caulked and connected to the earth lead wire 26. The earth terminal has a portion connected to the earth piece 43 formed in a substantially cylindrical shape, and an inner terminal formed in the cylindrical shape. The portion is fitted to the ground piece 43 to be mechanically connected and electrically connected.
[0045]
47 is a power supply terminal that is connected by caulking to the power supply lead wire 25. The power supply terminal has a portion connected to the power supply piece 38 formed in a substantially cylindrical shape, and an inner side formed in a cylindrical shape. The portion is fitted to the power feeding piece 38 to be mechanically connected and electrically connected.
[0046]
With this configuration, the user can connect directly to the power supply terminal 36 and the ground terminal 41 of the hub dynamo using the terminal at the tip of the lead wire provided in the electrical component such as the headlamp 3. There is an effect that the installation is easy.
[0047]
In the present embodiment, these ground terminal 46 and power supply terminal 47 are only fitted to the ground piece 43 or the power supply piece 38, respectively. It is also possible to adopt a configuration in which the retaining is made so as not to come off. For example, a protrusion and a recess are formed on either the piece or the terminal, and each of them is configured to be engaged when fitted, or a cut-and-raised is formed on the terminal side so as to prevent it from coming off, You may comprise so that a cut-and-raised may be latched by the electric power feeding socket 18, and it may become a stopper.
[0048]
【The invention's effect】
According to the present invention, a hub case of a wheel to which a magnet is fixed, an axle projecting from both ends of the hub case and rotatably supporting the hub case, a power generation coil positioned in the hub case and secured to the axle, Since the power supply terminal is located outside the hub case and is fed by a power supply line from the power generation coil and the ground terminal of the power generation coil provided outside the hub case, the bicycle frame is not damaged, There is an effect that reliable conduction is possible.
[0049]
Furthermore, since the power supply socket for holding the power supply terminal and the ground terminal is provided outside the hub case, when supplying power to electrical components, the connection to the lead wire is gathered in one place, so that the connection is easy There is.
[0050]
Further, since the power supply socket is attached by being sandwiched between a hub case and a nut by a nut for attaching the hub case to a bicycle axle , the power supply socket can be easily attached when attaching the hub case.
[0051]
Further, a sleeve having conductivity and concentrically provided with the axle is provided, and the sleeve electrically connects the ground of the power generation coil and the ground terminal, so that the ground can be processed along the axle. There is no need to provide a ground wire in particular, and there is an effect that wiring processing can be easily performed.
[0052]
And a terminal plate which is insulated and attached to the outer periphery of the sleeve and accommodates the power supply terminal . The terminal plate is provided with an insulating wall for insulating the sleeve, and the notch formed in the insulating wall Since the power supply terminal and the power supply terminal are electrically connected to each other, the sleeve and the power supply terminal, which are grounds, are reliably insulated by the insulating wall, and there is an effect that power can be reliably supplied without short-circuiting.
[0053]
Then, an insulating lid that covers the power supply terminal by covering the terminal plate is provided, and a conductive ring that electrically connects the sleeve and the ground terminal is provided outside the lid. The ground of the power generation coil can be connected to the ground terminal with a simple configuration, and the power supply terminal can be reliably insulated.
[0054]
Further, the power supply terminal forms a circumferential part concentrically formed with the axle and a power feeding piece partially extending from the circumferential part, and the ground terminal is formed concentrically with the axle. And a ground piece partially extending from the circumferential portion, and the terminal plate is formed with notches into which the power supply piece and the ground piece are respectively fitted. When inserting the power feeding connector into the ground piece , even if the terminal plate rotates due to the rotation of the power generating coil, the power feeding terminal and the ground terminal are rotated together, so that it is easy to attach.
[0055]
In addition, since the frame that surrounds the power supply piece of the power supply terminal and the ground piece of the ground terminal is integrally formed on the terminal plate, when the power supply connector is inserted, the frame is used to surround the connector. , There is an effect that it becomes easy to insert as a guide when inserting.
[0056]
Further, a power supply lead wire and a ground lead wire connected to the power supply piece and the ground piece are provided in one power supply cap, and when the power supply cap is fitted to the frame body, each lead wire is Since it is electrically connected, it becomes easy to be inserted as a guide when inserted, and there is an effect that the strength of the connection portion is increased.
[Brief description of the drawings]
FIG. 1 is a side cross-sectional view of a bicycle hub dynamo according to an embodiment of the present invention, with a part broken away.
FIG. 2 is a plan view of the terminal cap.
FIG. 3 is a plan view of a power feeding terminal portion of the terminal cap.
FIG. 4 is a plan view of a ground terminal portion of the terminal cap.
FIG. 5 is a side view of the front wheel portion of the bicycle when the bicycle hub dynamo is attached.
FIG. 6 is an exploded perspective view of the bicycle hub dynamo.
FIG. 7 is a plan view of a ground terminal portion of a terminal cap showing a second embodiment of the present invention.
[Explanation of symbols]
12 magnets 4 wheels (front wheels)
6 Hub case 14 Axle 21 Power generation coil 23 Feed line 36 Feed terminal 41 Ground terminal 18 Feed socket 25, 26 Lead wire 5 Nut 16 Sleeve 28 Terminal plate 30 Insulating wall 32 Notch 39 Lid 44 Ring 37 Circumference of feed terminal 38 Feeding piece 42 Circumferential portion 43 of grounding terminal 43 Grounding piece 34, 35 Notch 33 Frame 27 Feeding cap 46 Grounding terminal 47 Feeding terminal

Claims (6)

A wheel hub case with fixed magnets;
Both ends protrude from the hub case, and an axle that rotatably supports the hub case;
A power generating coil located in the hub case and fixed to the axle;
A feeding terminal fed by the feed line from the generator coil located outside the hub case, and a ground terminal provided outside the hub case,
A sleeve having electrical conductivity and concentrically provided with the axle, and electrically connecting the ground of the power generation coil and the ground terminal;
Provided outside the hub case, comprising a power supply socket for holding the power supply terminal and the ground terminal,
The bicycle hub dynamo is characterized in that the power supply socket is attached by being sandwiched between a hub case and a nut by a nut for attaching the hub case to the axle . A terminal plate is provided that is insulated and is attached to the outer periphery of the sleeve and accommodates the power supply terminal. The terminal plate is provided with an insulating wall for insulating the sleeve, and is supplied to a notch formed in the insulating wall. The bicycle hub dynamo according to claim 1, wherein the bicycle hub dynamo is electrically connected to the power supply terminal through an electric wire . An insulating lid that covers the power supply terminal by covering the terminal plate is provided, and a conductive ring that electrically connects the sleeve and the ground terminal is provided outside the lid. The bicycle dynamo according to claim 2. The power feeding terminal is formed with a circumferential portion formed concentrically with the axle, and a power feeding piece partially extending from the circumferential portion,
The ground terminal has a circumferential portion formed concentrically with the axle, and a ground piece partially extending from the circumferential portion,
The terminal plate is provided with notches for fitting the power feeding piece and the grounding piece, respectively.
The bicycle hub dynamo according to claim 3 , wherein said hub dynamo is formed. The bicycle hub dynamo according to claim 4 , wherein a frame body surrounding the power supply piece of the power supply terminal and the ground piece of the ground terminal is integrally formed on the terminal plate . A power supply lead wire and a ground lead wire connected to the power supply piece and the ground piece are provided in one power supply cap, and when the power supply cap is fitted to the frame body, each lead wire is electrically connected. the bicycle hub dynamo according to claim 5, characterized in that it is connected to.

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