JP3684355B2 - Generator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for generating electric power by receiving a driving force from an external rotating body such as a bicycle generator and a wind power generator.
[0002]
[Prior art]
In general, a bicycle or the like is provided with a generator that generates power by contacting a tire. This generator is composed of a dynamo case with a magnet, iron core, coil bobbin, a coil wound around this coil bobbin, etc., and either one of this magnet or coil is pressed against the tire and driven rotation In response to the change in magnetic flux, an induced electromotive force is generated in the coil.
[0003]
[Problems to be solved by the invention]
However, such generators since they are rotating only either one of the magnets or coils, can not be increased relative velocity of the magnet and the coil, in particular, induced electromotive force is low Ku in the low-speed rotation area Therefore, it is difficult to ensure effective illuminance for the light.
[0004]
On the other hand, in order to solve this problem, it is conceivable to increase the rotational speed of the magnet or coil by providing a transmission gear or the like at the base end portion on the side receiving the drive from the external rotating body. If only the side is rotated at a high speed, a large centrifugal force will be applied to the part, which may cause damage to the part, as well as causing a failure of the entire generator due to the natural vibration based on the high speed rotation. It can be.
[0005]
[Means for Solving the Problems]
Then, in order to solve the said subject, the generator of this invention has the magnet (30) and the coil (5) which has a core material (40) inside the case main body (2), and this case main body. In the generator (1) comprising a fixing part (25) for fixing (2) adjacent to the external rotating body (7), the driven rotation of the rotating roller (31) in contact with the external rotating body (7) The core (40) and the coil by the follower rotation of the first rotating mechanism (3) for rotating the magnet (30) by the rotating roller (41) contacting the opposite side of the rotation center of the external rotating body (7) A second rotation mechanism (4) for rotating (5) in a direction opposite to the rotation direction of the magnet (30) is provided .
[0006]
By providing a mechanism for rotating the magnet and the coil in opposite directions as described above, the relative speed between the coil and the magnet is increased, and a larger induced electromotive force can be generated. Further, since it is not necessary to rotate only one side of the magnet or the coil at high speed, it is possible to reduce the failure of the generator based on centrifugal force, natural vibration, or the like.
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 and 2 are sectional views of a generator 1 showing an embodiment of the present invention, and FIG. 3 shows a use state of the generator 1.
[0007]
The generator 1 includes a multipolar magnet 30 (for example, an 8-polar magnet) having a circular cross section inside a case body 2 composed of a first case 20 and a second case 21, and a rotating shaft of the multipolar magnet 30. The core member 40 is provided on the same rotational axis as the magnetic pole pieces 40a and 40b corresponding to the magnetic poles, and the coil 5 is wound around the waist 40c of the core member 40. The first rotating mechanism 3 that contacts the disk surface 70 of the external rotating body 7 to rotate the magnet 30 in a driven manner, and the disk surface 70 opposite to the rotation center 71 of the external rotating body 7 contacts the core material. And a second rotating mechanism 4 that rotates the dielectric portion 6 including the coil 5 and the coil 5. Then, by using the first rotating mechanism 3 and the second rotating mechanism 4 to rotate the dielectric portion 6 composed of the core material 40 and the coil 5 and the magnet 30 in opposite directions, the magnet 30 and the coil 5 The relative speed is increased to generate a larger induced electromotive force. Hereinafter, the configuration of the generator 1 will be specifically described.
[0008]
The case body 2 is configured to be separated into a first case 20 and a second case 21 so as to facilitate assembly work. The first rotation mechanism 3 is provided on the first case 20. At the same time, the second rotating mechanism 4 is assembled to the second case 21 so that they can be joined at the central portion. The first case 20 and the second case 21 are composed of conductive members so as to enable ground connection of the one end side 5a of the coil 5, and also enable external output of the other end side 5b of the coil 5. A hole for attaching the push terminal connecting portion 22 to the second case 21 is provided. The push terminal connecting portion 22 has a brush member 24 that contacts a conductive plate 45 (described later) attached to the upper end portion of the connecting portion 22 to enable electric output from the rotating coil 5, and the hole portion via the insulating member 23. A power line is connected to the ground side and the push terminal connecting portion 22 side so that electricity can be output. The case body 2 configured in this way can be fixed in the vicinity of the rotation center 71 of the external rotating body 7 via a fixing portion 25 provided in the second case 21. As the external rotating body 7, for example, when a bicycle wheel or the like is used, the case main body 2 can be fixed to a fork or a hub.
[0009]
The first rotating mechanism 3 includes a rotating roller 31 that is driven by contact with the disk surface 70 of the external rotating body 7, a multipolar magnet 30 in which four north and four south poles are arranged on the circumference, The shaft member 32 is configured to connect the rotation center of the multipolar magnet 30 and the rotation center of the rotation roller 31, and the shaft member 32 is formed as an opening end 20 a of the first case 20 or a bearing member (not shown). The multipolar magnet 30 is allowed to rotate by supporting it rotatably. The shaft member 32 is configured in a straight line when the rotating roller 31 is used in contact with the planar external rotating body 7, and the thickness of the shaft member 32 gradually decreases toward the outside like a bicycle wheel. When contacting the external rotating body 7, a connecting means for bending the rotating shaft along the wheel surface may be provided.
[0010]
The second rotating mechanism 4 includes a rotating roller 41 having a groove on the outer peripheral portion, and a shaft member 42 that pivotally supports the rotating center of the dielectric unit 6 and the rotating roller 41, and includes a second case. The dielectric portion 6 is rotatably supported by an opening end portion 21a of 21 or a bearing member (not shown). The shaft member 42 also has the same configuration as the first rotation mechanism 3. When the shaft member 42 is used in contact with the planar external rotating body 7, the shaft member 42 is configured linearly, and a bicycle wheel or the like is used. When used in contact with the deformed external rotating body 7 as described above, a connecting means for bending the rotating shaft may be provided.
[0011]
On the other hand, the core member 40 is disposed on the substantially same rotational axis below the multipolar magnet 30 and is downwardly associated with one magnetic pole (for example, N pole) of the multipolar magnet 30 as shown in FIG. And a second magnetic pole piece 40b raised from below corresponding to the other magnetic pole (for example, the S pole). The first magnetic pole piece 40a is erected from the upper end portion of the waist portion 40c toward the outer periphery of the multipolar magnet 30, and the second magnetic pole piece 40b is provided from the lower end portion of the waist portion 40c. 40a is provided upright so as to be positioned on the outer peripheral portion of 40a. A brush member 43 is attached to the lower surface of the second magnetic pole piece 40b so as to be in contact with the second case 21, and a disk is provided inside the brush member 43 via a thin insulating member 44. A conductive plate 45 is attached. The coil 5 is wound around the waist 40c of the core member 40, one end side 5a of the coil 5 is connected to the brush member 43 and grounded to the second case 21, and the other end side 5b is connected to the conductive board 45. It connects so that it can output externally from the connection part 22 for push terminals via the brush member 24. FIG.
[0012]
Next, the case where the generator 1 configured as described above is used will be described.
[0013]
First, it is fixed to a fixing member such as a fork provided adjacent to the external rotating body 7 through the fixing portion 25 of the case body 2 and is positioned near the rotation center 71 of the external rotating body 7. The rotating roller 31 on the rotating mechanism 3 side and the rotating roller 41 on the second rotating mechanism 4 side are brought into contact with and pressed against the opposite side of the rotation center 71 of the external rotating body 7. When the external rotating body 7 is rotated using an external force in this state, the rotating rollers 31 and 41 on the first rotating mechanism 3 side and the second rotating mechanism 4 side are placed on the disk surface 70 of the external rotating body 7. The first magnetic pole piece 40a and the second magnetic pole piece 40b corresponding to the respective magnetic poles of the multipolar magnet 30 are magnetized with different types of magnetic force. Accordingly, the induced electromotive force is generated in the coil 5 wound around the waist 40c of the core member 40, one end 5a by the brush member 43 which always contacts the second case 21 is grounded during the rotation of the coil 5 The brush member 24 provided at the upper part of the push terminal connection portion 22 is always in contact with the conductive board 45, so that the induced electromotive force can be output from the push terminal connection portion 22.
[0014]
As described above, according to the embodiment, the case body 2 has the magnet 30 and the coil 5 having the core member 40 inside, and the fixing portion that fixes the case body 2 adjacent to the external rotating body 7. In the generator 1 comprising 25, the first rotating mechanism 3 that rotates the magnet 30 by the driven rotation of the rotating roller 31 that contacts the external rotating body 7, and the opposite side of the rotation center of the external rotating body 7 Since the second rotation mechanism 4 that rotates the core material 40 and the coil 5 in the direction opposite to the rotation direction of the magnet 30 by the driven rotation of the rotating roller 41 in contact is provided , compared with the case where only the magnet 30 is rotated. Thus, the relative speed between the coil 5 and the magnet 30 can be increased, and a larger induced electromotive force can be generated. Therefore, it is possible to obtain an effective electromotive force necessary for lighting even when the bicycle is driven at a low speed, and it is not necessary to rotate only one of the magnet 30 and the coil 5 at a high speed. high-speed rotating component failure and generators entire based on centrifugal force and natural frequency by making it possible to prevent.
[0015]
In addition, this invention can be variously changed without being limited to the said embodiment. For example, in the above-described embodiment, the magnet 30 and the dielectric portion 6 are arranged in series on substantially the same axis. Contrary to this, a core material and a coil may be provided on the rotation center side, a magnet may be provided on the outer periphery thereof, and each may be rotated in the opposite direction.
[0016]
Furthermore, in the said embodiment, although the coil 5 and the core material 40 were integrated and rotated together, you may make it rotate only a core material in the opposite direction to a magnet, without rotating a coil.
【The invention's effect】
The generator of the present invention has a magnet (30) and a coil (5) having a core material (40) inside a case body (2), and the case body (2) is connected to an external rotating body (7). In the generator (1) having a fixing part (25) fixed adjacent to the outer rotating body (7), the magnet (30) is rotated by the driven rotation of the rotating roller (31) in contact with the external rotating body (7) . The core material (40) and the coil (5) are moved to the magnet (30) by the driven rotation of one rotation mechanism (3) and the rotation roller (41) contacting the opposite side of the rotation center of the external rotation body (7). Since the second rotation mechanism (4) that rotates in the direction opposite to the rotation direction is provided , the relative speed between the core or the coil and the magnet can be increased, and the induced electromotive force can be increased based on this. You can make it bigger.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a generator showing an embodiment of the present invention. FIG. 2 is a state diagram showing a cross section along line AA in FIG. 1. FIG. Description】
DESCRIPTION OF SYMBOLS 1 ... Generator 2 ... Case main body 3 ... 1st rotation mechanism 4 ... 2nd rotation mechanism 5 ... Coil 7 ... External rotating body 25 ... Fixed part 30- .... Magnet 40 ... Core 40a ... First pole piece 40b ... Second pole piece 71 ... Center of rotation

Claims (1)

The case main body (2) has a magnet (30) and a coil (5) having a core member (40), and the case main body (2) is fixed adjacent to the external rotating body (7). In the generator (1) including the fixed portion (25), a first rotating mechanism (3) that rotates the magnet (30) by the driven rotation of the rotating roller (31) that contacts the external rotating body (7). And the core (40) and the coil (5) in the direction opposite to the rotation direction of the magnet (30) by the driven rotation of the rotation roller (41) contacting the opposite side of the rotation center of the external rotation body (7). A generator (1) characterized in that a second rotation mechanism (4) for rotation is provided.

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