JP2007129814A - Generating set and charging set using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a generating set which can accumulate mechanical energy with small power. <P>SOLUTION: A spiral spring can be shrunk bit by bit by rotating a rachet gear 45 bit by bit by reciprocating a lever 11 two or more times. This way, the operator can accumulate mechanical energy bit by bit. Moreover, a ratchet mechanism is composed of a stopper, a pair of feeding claws, and a rachet gear 45. Therefore, the rachet gear 45 is regulated for reversal by the stopper 4 of the rachet mechanism. That is, it is arranged so that the mechanical energy may not decrease by the unintentional release of the spiral spring by the rachet mechanism when accumulating the mechanical energy. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a power generation device that accumulates external mechanical energy and converts the mechanical energy into electrical energy, and a charging device using the power generation device.

2. Description of the Related Art In recent years, power generation apparatuses have been proposed that generate power using human movements as an energy source for power supply to radios, mobile phones, and the like in an emergency such as a disaster.
As such a power generation device, for example, as disclosed in Patent Document 1, a mechanical energy storage type power generation device that uses a motion of a person walking as mechanical energy is known. That is, as shown in FIGS. 10A and 10B, a mechanical energy storage type power generation device (hereinafter referred to as “power generation device 100”) includes a case 101, and a part of the rack 110 from the case 101. Is exposed to the outside. One end of the rack 110 is supported by a spring 111 disposed in the case 101 in a state where it is always urged in a direction of protruding outward from the case 101. A plurality of teeth are arranged in the longitudinal direction on one side surface of the rack 110 and meshed with the gear mechanism 130. The gear mechanism 130 includes a first gear mechanism 131, a second gear mechanism 132, and a third gear mechanism 133, and the first gear mechanism 131 meshes with the rack 110. The first gear mechanism 131 meshes with the second gear mechanism 132, and the second gear mechanism 132 meshes with the third gear mechanism 133. A support shaft 133a is provided at the center of the third gear mechanism 133, and the support shaft 133a is connected to an end portion on the center side of the mainspring 120 formed in a spiral shape so as to be integrally rotatable. The outer end of the mainspring 120 is fixed to the inner wall of the case 101.

  The power generation apparatus 100 includes a power generator 140 and a transmission mechanism 150 that transmits the mechanical energy stored in the mainspring 120 to the power generator 140. The transmission mechanism 150 includes a first transmission gear mechanism 151 connected to the third gear mechanism 133 and a second transmission gear mechanism 152 connected to the first transmission gear mechanism 151. The second transmission gear mechanism 152 includes a power generation gear 153, and a rotating shaft 154 that rotates integrally with the power generation gear 153 is supported in the generator 140. The generator 140 has a known configuration that converts mechanical energy based on the rotational force of the rotating shaft 154 into electric power. When power is generated by the generator 140, the energy obtained by the power generation is sent to the rechargeable battery via the rectifier 141.

The power generation apparatus 100 configured as described above is used, for example, provided on the shoe sole so that one end of the rack 110 protrudes.
First, when the shoes land on the ground, the rack 110 receives a pressing force F as mechanical energy from below. Then, the rack 110 moves upward against the urging force of the spring 111. When the first gear mechanism 131 rotates as the rack 110 moves, the third gear mechanism 133 rotates via the second gear mechanism 132. Then, based on the rotation of the third gear mechanism 133, the mainspring 120 is wound and contracts. In this state, mechanical energy is accumulated in the mainspring 120.

  Next, when the shoe leaves the ground, the pressing force F applied to the rack 110 is released, and the rack 110 protrudes downward due to the elastic force of the spring 111. Then, the first gear mechanism 131, the second gear mechanism 132, and the third gear mechanism 133 rotate in the opposite directions from when the shoes land on the ground based on the release of the mechanical energy stored in the mainspring 120. . At this time, the first transmission gear mechanism 151 and the second transmission gear mechanism 152 also rotate based on the release of mechanical energy by the mainspring 120. And the rotating shaft 154 also rotates and the power generation by the generator 140 is performed. That is, the power generation apparatus 100 automatically generates power based on normal walking, and energy obtained by the power generation is rectified by the rectifier 141 and sent to the rechargeable battery.

In this way, the rack 110 moves up and down every time one step is taken, so that power generation is repeated, and usable electric energy can be stored in the rechargeable battery.
JP 2004-21642 A

  However, in the power generation apparatus 100 configured as described above, since the mainspring 120 must be sufficiently wound by the input accompanying one movement of the rack 110, the amount of movement of the rack 110 is amplified and transmitted to the mainspring 120. I had to let it. For this reason, in order to accumulate | store mechanical energy in the mainspring 120, big force (pressing force F) was required.

  This invention is made | formed in view of such a situation, The objective is to provide the electric power generating apparatus which can accumulate | store dynamic energy with a small force.

  In order to solve the above problems, the invention according to claim 1 is characterized in that a storage means for storing and releasing mechanical energy, an input means provided so as to be capable of reciprocating, and a storage means for storing the energy. A transmission mechanism for transmitting the energy to the storage means based on a one-way movement of the input means in a state of being linked to the storage means, and releasing the linkage with the storage means when the energy is released; A power generation device that converts the mechanical energy released by the storage means into electrical energy, wherein the transmission mechanism is operable only in the direction in which the mechanical energy is stored in the storage means. And a reciprocating motion of the input means a plurality of times to distribute a predetermined amount of mechanical energy in the storage means. And the gist that it has to be accumulated.

  According to a second aspect of the present invention, in the power generation device according to the first aspect, the one-way mechanism includes a ratchet gear that rotates in a storage direction of mechanical energy in the storage unit based on a one-way movement of the input unit. The gist of the present invention is a ratchet mechanism including a stopper that engages with the teeth of the ratchet gear and restricts rotation of the ratchet gear in the direction opposite to the accumulation direction.

  According to a third aspect of the present invention, in the power generation device according to the first or second aspect, the transmission mechanism is configured to link the transmission mechanism and the storage unit when the mechanical energy of the storage unit is stored. And a linkage mechanism for releasing the linkage between the transmission mechanism and the storage means when releasing the mechanical energy of the storage means, and the linkage mechanism has the preset amount of mechanical energy in the storage means. The gist is to release the linkage between the transmission mechanism and the storage means at the timing of storage.

  According to a fourth aspect of the present invention, in the power generation device according to the third aspect, the linkage mechanism includes a first transmission gear and a second transmission gear that mesh with each other, and the first transmission gear is a member of the input unit. The second transmission gear is linked to the accumulating means, and the notch is preset in the accumulating means. The gist is that the first transmission gear and the second transmission gear are disengaged by separating from the second transmission gear at a timing when a sufficient amount of mechanical energy is accumulated.

  According to a fifth aspect of the present invention, in the power generation device according to any one of the first to fourth aspects, the input means is provided with a weight portion that promotes the reciprocating operation of the input means. It is a summary.

  According to a sixth aspect of the present invention, in the power generation apparatus according to any one of the first to fifth aspects, the accumulating unit includes a spiral spring, and the power generating unit is a rotating unit. A gear mechanism comprising a motor having a rotating shaft for movement, and mechanically transmitting mechanical energy accumulated in the mainspring to the rotating shaft of the motor between the rotating shaft of the motor and the mainspring. The gear mechanism includes a frictional resistance generated in the mainspring when releasing the mechanical energy accumulated in the mainspring, and a frictional resistance generated in the motor when converting the mechanical energy into electric energy. The gist is that the gear ratio is set in consideration of the above.

  The invention according to claim 7 is the power generation apparatus according to claim 5, wherein the input means is supported so as to be rotatable about a fulcrum, and the weight portion is opposite to the fulcrum side of the input means. The gist of the present invention is that a pendulum motion is provided along with the input means about the fulcrum as an axis.

  The invention according to claim 8 is provided with the power generation device according to any one of claims 1 to 7 and a rechargeable battery that stores electrical energy obtained by the power generation means. It is a summary.

(Function)
According to the operation of the first aspect of the present invention, a predetermined amount of mechanical energy can be stored in the storage unit by operating the input unit a plurality of times. At that time, the transmission mechanism can be operated only in the direction in which the mechanical energy is stored by the one-way mechanism so that the storage means is not released and the mechanical energy is not reduced. That is, the mechanical energy can be stored little by little with a small force as compared with the case where a predetermined amount of the mechanical energy is stored at one time.

  According to the invention described in claim 2, in addition to the operation of the invention described in claim 1, the one-way mechanism is constituted by a ratchet mechanism, and the ratchet gear is rotated in the opposite direction by the stopper of the ratchet mechanism. It is regulated. For this reason, when the mechanical energy is stored in the storage means, it is possible to reliably prevent a decrease in the mechanical energy stored in the storage means. In addition, since it is not necessary to amplify the operation amount of the input means using a plurality of gears and accumulate mechanical energy in the accumulating means at a time, the mechanical energy can be accumulated little by little with a small force.

  According to the invention described in claim 3, in addition to the operation of the invention described in claim 1 or 2, the transmission mechanism and the storage are stored at a timing at which a predetermined amount of mechanical energy is stored in the storage means. The linkage with the means is released and the mechanical energy of the storage means is automatically released. For this reason, it is not necessary to positively release the regulation of the storage means in order to release mechanical energy. For this reason, convenience can be improved.

  According to the invention described in claim 4, in addition to the operation of the invention described in claim 3, a notch is formed in a part of the first transmission gear of the linkage mechanism. Then, at the timing when a predetermined amount of mechanical energy is stored in the storage means by the input means, the meshing (linkage) between the first transmission gear and the second transmission gear is released by the notch. For this reason, it is automatically released when the mechanical energy of the storage means reaches a preset amount. Therefore, the mechanical energy stored in the storage means can be automatically released without complicating the configuration.

  According to the invention described in claim 5, in addition to the operation of the invention described in any one of claims 1-4, the reciprocating operation of the input means is promoted by the weight portion. For this reason, even if the force applied to the input means and the weight is small, the mechanical energy can be stored in the storage means.

  According to the invention described in claim 6, in addition to the action of the invention described in any one of claims 1 to 5, the gear ratio of the gear mechanism is such that the mechanical energy accumulated in the mainspring is reduced. It is set in consideration of both the frictional resistance generated at the time of discharge and the frictional resistance in the motor generated when converting mechanical energy into electric energy. For this reason, it is possible to design (select) a gear mechanism having an optimal gear ratio in consideration of loss of mechanical energy.

  According to the seventh aspect of the invention, in addition to the action of the fifth aspect of the invention, the weight portion is provided at the end of the input means opposite to the fulcrum side. When acceleration such as vibration or impact is applied, the input means performs a pendulum motion around the fulcrum. For this reason, mechanical energy can be automatically stored in the storage means based on this pendulum motion.

  According to the invention described in claim 8, the electric energy generated by the power generator according to any one of claims 1 to 7 can be stored in the rechargeable battery. Therefore, it is possible to use electrical energy generated using mechanical energy in advance. For this reason, convenience can be improved.

  According to the present invention, mechanical energy can be stored with a small force.

Hereinafter, an embodiment in which the power generation device of the present invention is embodied as a charging device for manually charging a rechargeable battery of a mobile terminal device such as a mobile phone and a PDA will be described with reference to FIGS.
<Outline of charging device 1>
As shown in FIG. 1, the charging device 1 includes a case 2, a power generation device 10 accommodated in the case 2, and a connector 3 that is pulled out from the case 2 and connected when supplying power to a portable terminal (not shown). I have.

<Power generation device 10>
The power generation device 10 is stored in the mainspring mechanism 20, the lever 11 as input means, the spring mechanism 20 as storage means, the transmission mechanism 40 that transmits mechanical energy to the mainspring mechanism 20 based on the movement of the lever 11. A power generation mechanism 70 is provided as power generation means for converting mechanical energy into electrical energy.

<Lever 11>
As shown in FIG. 2, the lever 11 includes a grip portion 12 that can be operated by an operator's hand, and a gear feed portion 13 that is coupled to the transmission mechanism 40. In the gear feed portion 13, one through hole 14 and two insertion holes 15, 15 are arranged in a row in parallel with the longitudinal direction of the lever 11. The through hole 14 and the insertion holes 15, 15 are arranged in the order of the insertion hole 15, the through hole 14, and the insertion hole 15 from the grip portion 12 side. Moreover, the holding part 12 protrudes outside so that reciprocation is possible from the long hole-like slide hole 2a formed in the side surface of the case 2.

<Transmission mechanism 40>
As shown in FIG. 3, the transmission mechanism 40 includes a first gear mechanism 41, a second gear mechanism 51, and a third gear mechanism 61, and the operating force of the lever 11 is the first gear mechanism 41, the second gear mechanism. This is transmitted to the mainspring mechanism 20 via the mechanism 51 and the third gear mechanism 61.

<First gear mechanism 41>
As shown in FIG. 2, the first gear mechanism 41 includes a first shaft 42, two feed shafts 43, 43, a pair of feed claws 44, 44, a ratchet gear 45, and a notch gear 46 as a first transmission gear. It has. The first shaft 42 is inserted through the through hole 14 of the lever 11, and both ends are rotatably supported by the case 2. The lever 11 is rotatable relative to the first shaft 42 and rotates around the first shaft 42 in the feed direction indicated by the arrow X and the return direction indicated by the arrow Y in FIG. One ends of feed shafts 43 and 43 are rotatably supported in the insertion holes 15 and 15 of the lever 11, respectively. Further, feed claws 44 are supported at the other ends of the feed shafts 43, 43 so as to be integrally rotatable.

  As shown in FIG. 4, the pair of feed claws 44 and 44 each have a substantially crescent shape, and a locking portion 44a formed in a claw shape and a support portion 44b that supports the locking portion 44a. And. A circular through hole 44c is formed at the center of the support portion 44b, and the other end of the feed shaft 43 is supported by the through hole 44c.

  The ratchet gear 45 is formed of a gear portion 45a in which a plurality of teeth T are formed and a cylindrical portion 45b in which the teeth T are not formed. The tooth T of the gear portion 45a is provided with an inclined surface 45i inclined inward in the feed direction indicated by an arrow X in FIG. 4 and a regulating surface 45s formed in a direction orthogonal to the tangent to the gear portion 45a. It has been. The feed claws 44, 44 are arranged so that the locking portion 44a faces the rotation direction of the ratchet gear 45 (right direction indicated by the arrow R), and is always attached to the ratchet gear 45 side by a torsion spring (not shown). It is energized. The cylindrical portion 45b of the ratchet gear 45 is fixed to the center of the upper surface of the gear portion 45a and rotates integrally with the gear portion 45a.

  A stopper 4 is disposed on the side of the ratchet gear 45 so as to engage with the restriction surface 45s. The stopper 4 has a crescent shape like the feed claw 44, and is supported so as to be rotatable relative to the case 2 via a stopper shaft 4a. The tip of the stopper 4 is directed rightward as indicated by an arrow R in FIG. 4, and is engaged with the restricting surface 45 s of the ratchet gear 45, thereby causing the ratchet gear 45 to move leftward as indicated by an arrow L in FIG. Rotation is regulated. The stopper 4 is always urged toward the ratchet gear 45 by the elastic force of a torsion spring (not shown).

  When the lever 11 is rotated in the feed direction indicated by the arrow X in FIG. 4, the ratchet gear 45 rotates in the right direction indicated by the arrow R because the restricting surface 45s of the ratchet gear 45 is pressed by the locking portion 44a. To do. On the other hand, when the lever 11 is rotated in the return direction indicated by the arrow Y in FIG. 4, the rotation of the gear portion 45 a of the ratchet gear 45 in the left direction indicated by the arrow L in FIG. 4 is restricted by the stopper 4. The feed claw 44 slides along the inclined surface 45i. For this reason, the lever 11 can be returned to the original position without rotating the ratchet gear 45. The slide hole 2a is formed to allow the lever 11 to reciprocate. The one-way mechanism and the ratchet mechanism are configured by the stopper 4, the pair of feed claws 44, 44, and the ratchet gear 45.

  As shown in FIG. 5, the notch gear 46 is fixed to the upper surface of the cylindrical portion 45 b and rotates integrally with the ratchet gear 45. On a part of the outer periphery of the notch gear 46, a notch portion 46a in which no teeth are formed is formed. Note that the notch angle of the notch 46a is set to about 45 degrees in the present embodiment. The teeth of the notch gear 46 mesh with a part of the second gear mechanism 51. That is, the operating force of the lever 11 is transmitted as mechanical energy to the second gear mechanism 51 via the ratchet gear 45 and the notch gear 46.

<Second gear mechanism 51>
As shown in FIG. 3, the second gear mechanism 51 includes a second shaft 52, an intermediate gear 53, and a large gear 54. The intermediate gear 53 and the large gear 54 are fixed to the second shaft 52 so as to be integrally rotatable, and are supported so as to be rotatable with respect to the case 2 via the second shaft 52. The second shaft 52 is parallel to the first shaft 42 and passes through the center of the intermediate gear 53 and the large gear 54.

  As shown in FIG. 8A, the intermediate gear 53 meshes with the notch gear 46. Further, as shown in FIG. 8 (b), the intermediate gear 53 is disengaged (not contacted) at the notch 46 a of the notch gear 46. That is, the intermediate gear 53 rotates together with the notch gear 46 in a state where it is engaged with the notch gear 46, and when the notch portion 46 a of the notch gear 46 reaches the intermediate gear 53, the meshing thereof is released. The large gear 54 rotates integrally with the middle gear 53 and meshes with the third gear mechanism 61. The intermediate gear 53 and the notch gear 46 constitute a linkage mechanism. The intermediate gear 53 constitutes a second transmission gear.

<Third gear mechanism 61>
As shown in FIG. 3, the third gear mechanism 61 includes a third shaft 62 as a rotation shaft and a small gear 63 fixed to the third shaft 62 so as to be integrally rotatable. One end of the third shaft 62 is rotatably supported on the side wall of the case 2, and the other end penetrates the mainspring mechanism 20 and is supported by the power generation mechanism 70. The small gear 63 is engaged with the large gear 54 and rotates based on the rotation of the large gear 54.

<Spring mechanism 20>
As shown in FIG. 3, the mainspring mechanism 20 includes a gear box 21, and the mainspring 22 and the gear mechanism 23 shown in FIGS. 6A and 6B are accommodated in the gearbox 21. . The gear box 21 is penetrated by the third shaft 62. The gear mechanism 23 includes a first gear 24, a second gear 25, and a third gear 26. The center of the first gear 24 is penetrated by the third shaft 62 and is fixed to the third shaft 62 so as to be integrally rotatable. The second gear 25 meshes with the first gear 24 while being rotatably supported in the gear box 21 by the shaft 25a. The center of the third gear 26 is penetrated by a rotary shaft 27 disposed at the center of the mainspring 22 and meshes with the second gear 25. That is, when the third shaft 62 rotates through the small gear 63, mechanical energy is transmitted in the order of the first gear 24, the second gear 25, the third gear 26, and the rotating shaft 27, and rotates.

  The mainspring 22 has a spiral shape, and an inner end portion 22 a provided at the center of the mainspring 22 is fixed to a side surface of the rotary shaft 27. An outer end 22 b provided outside the mainspring 22 is fixed to the inner wall of the gear box 21. That is, the mainspring 22 contracts while elastically deforming when the rotating shaft 27 rotates in the accumulation direction indicated by the arrow A in FIG. That is, when the rotating shaft 27 is rotated in the accumulation direction indicated by the arrow A in FIG. 6A, the inner end portion 22a of the spring 22 is fixed to the rotating shaft 27. The spring 22 is tightened against the elastic force of the spring 22. For this reason, the mainspring 22 is contracted with the rotation of the rotary shaft 27, and a restoring force, that is, “mechanical energy” for returning to the original state is accumulated.

  As shown in FIG. 8B, when the notch gear 46 rotates to a position corresponding to the middle gear 53 in a state where the mechanical energy is stored in the mainspring 22, the notch gear 46 and the middle gear The meshing with 53 is released. Then, the rotary shaft 27, the gear mechanism 23 (the first gear 24, the second gear 25, and the third gear 26), the third shaft 62, and the intermediate gear 53 are rotated by releasing the mechanical energy of the mainspring 22. When the mechanical energy accumulated in the mainspring 22 is completely discharged, the state returns to the original state shown in FIG. The amount of dynamic energy stored in the mainspring 22 is set in advance to an amount capable of generating electrical energy necessary for charging the mobile terminal device such as the mobile phone and the PDA. The circumferential length of the notch gear 46 and the notch angle of the notch 46a are set so that the engagement with the intermediate gear 53 is released when the mainspring 22 is wound to such an extent that a predetermined restoring force is obtained. Its length and angle are set.

<Power generation mechanism 70>
As shown in FIG. 7, the power generation mechanism 70 is configured by a brushless motor and includes a stator 71, a coil 72, and a magnet 73. The stator 71 is fixed to the case 2 and includes an annular outer frame portion 71a. Three branch portions 71b project from the inner peripheral surface of the outer frame portion 71a. Each branch portion 71b is arranged at a predetermined interval in the circumferential direction of the outer frame portion 71a. The tip of each branch portion 71b is an arc-shaped concave surface, and a circular space (hereinafter referred to as “hollow portion 74”) is formed by being surrounded by the tip surface of each branch portion 71b. Coils 72 are wound around the branch portions 71b.

  The magnet 73 is formed in a cylindrical shape, and a through hole 73a is formed at the center. The third shaft 62 is inserted and supported in the through hole 73 a of the magnet 73, and the magnet 73 rotates integrally with the third shaft 62. The magnet 73 is disposed in the hollow portion 74 and has N and S poles alternately in the circumferential direction. Therefore, an induced current (alternating current) is generated in the coil 72 due to a change in the magnetic field due to the rotation of the magnet 73 in the stator 71. The coil 72 is connected to a rectifier 75, and the induced current is rectified by the rectifier 75. The rectifier 75 can be electrically connected to the rechargeable battery 76 of the mobile phone via the connector 3, and the rectified electric energy in the connected state is stored in the rechargeable battery 76.

<Gear ratio setting method of gear mechanism 23>
Next, a method for setting the gear ratio of the gear mechanism 23 in the mainspring mechanism 20 configured as described above will be described.

The gear ratio of the gear mechanism 23 is determined by comparing the power generation energy E _E generated when releasing the mechanical energy of the mainspring 22 with the mechanical energy E _M (more precisely, elastic energy) when the mainspring 22 is accumulated. And set it to the most efficient value. Assuming that the rotation angle of the third shaft 62 is θ [rad], the equation of motion is represented by the following equation (1).

なお、上記数式（１）において、Ｊは全体の慣性モーメント、Ｄは発電機構７０（モータ）の粘性係数、Ｋはゼンマイ２２のばね定数、Ｎはギア機構２３のギア比、Ｒ_１はゼンマイ２２の摩擦係数、Ｒ_２は発電機構７０の摩擦係数である。但し、第３シャフト６２は、ゼンマイ２２に電気的エネルギーを蓄積する際において、一方にしか回転しないため、シー≧０、Ｋ＝０となっている。

In the above formula (1), J is the total moment of inertia, D is the viscosity coefficient of the power generation mechanism 70 (motor), K is the spring constant of the spring 22, N is the gear ratio of the gear mechanism 23, and R ₁ is the spring 22. , R ₂ is the friction coefficient of the power generation mechanism 70. However, since the third shaft 62 rotates only in one direction when electric energy is stored in the mainspring 22, the relation of sea ≧ 0 and K = 0 is satisfied.

  Next, assuming that the number of turns of the mainspring 22 is M [Turn], the initial condition shown by the equation (2) is given, and a solution θ ′ is obtained. In this embodiment, “θ ′” is a first derivative of “θ”, and “θ ″” is a second derivative of “θ”.

発電機構７０の起電力定数Ｋ_Ｅ、負荷抵抗Ｒ［Ω］を用いると発電エネルギーＥ_Ｅは数式（３），（４）によって導き出される。なお、数式（４）のＴは、発電時間である。

When the electromotive force constant K _{E of} the power generation mechanism 70 and the load resistance R [Ω] are used, the power generation energy E _E is derived from the equations (3) and (4). Note that T in Equation (4) is a power generation time.

ゼンマイ２２の力学的エネルギーＥ_Ｍを用いると発電効率Ｑは、次の数式（５）のように示される。

Power generation efficiency Q and using mechanical energy E _M of the mainspring 22 is expressed by the following equation (5).

このギア比Ｎと、発電効率Ｑとの関係示す発電効率グラフＰを図９に示す。発電効率グラフＰの縦軸は発電効率Ｑとなっており、横軸は前記ギア機構２３のギア比Ｎとなっている。上記数式（１）〜（５）により、ギア比Ｎに対応する発電効率Ｑを求め、それらをプロットした点を結ぶことにより図９に示される理論曲線Ｃを得ることができる。

A power generation efficiency graph P showing the relationship between the gear ratio N and the power generation efficiency Q is shown in FIG. The vertical axis of the power generation efficiency graph P is the power generation efficiency Q, and the horizontal axis is the gear ratio N of the gear mechanism 23. The theoretical curve C shown in FIG. 9 can be obtained by obtaining the power generation efficiency Q corresponding to the gear ratio N from the above mathematical formulas (1) to (5) and connecting the plotted points.

The values of θ ₀ , J, D, K, N, R ₁ , R ₂ , K _E , T, and R are as shown in Table 1 below.

また、実際に発電効率を実験によって確認した結果、発電効率Ｑは最大で４７％となり、そのときのギア機構２３のギア比が２２．０５であった。これは、理論曲線Ｃにおけるギア比が２０のときの発電効率４５％に近似する。このため、数式（１）〜（５）を利用することで、ギア機構２３の最適なギア比を容易に計算することができる。なお、本実施形態における発電機構７０はブラシレスモータのため、発電機構７０内におけるブラシと第３シャフト６２（回転軸）との摩擦抵抗における力学的エネルギーの損失がほとんどない。このため数式（１）におけるＲ_２（発電機構７０の摩擦係数）を省略して計算してもよい。

As a result of actually confirming the power generation efficiency by experiment, the power generation efficiency Q was 47% at the maximum, and the gear ratio of the gear mechanism 23 at that time was 22.05. This approximates the power generation efficiency of 45% when the gear ratio in the theoretical curve C is 20. For this reason, the optimal gear ratio of the gear mechanism 23 can be easily calculated by using the mathematical formulas (1) to (5). Since the power generation mechanism 70 in the present embodiment is a brushless motor, there is almost no loss of mechanical energy in the frictional resistance between the brush and the third shaft 62 (rotary shaft) in the power generation mechanism 70. For this reason, R ₂ (the friction coefficient of the power generation mechanism 70) in the mathematical formula (1) may be omitted.

<Operation of Embodiment>
Next, the operation of the charging device 1 will be described. In addition, the notch part 46a of the notch gear 46 of the charging device 1 is in a state where it does not mesh with the intermediate gear 53 as shown in FIG. The connector 3 is connected to a mobile phone.

<When accumulating mechanical energy>
First, the operator rotates the lever 11 in the feed direction indicated by the arrow X in FIG. Then, the ratchet gear 45 rotates in the right direction indicated by an arrow R in FIG. 4 when the teeth T of the ratchet gear 45 are pressed by the locking portion 44a of the feed claw 44. As a result, the cylindrical portion 45b and the notch gear 46 also rotate integrally in the right direction indicated by the arrow R in FIG. Then, the lever 11 is rotated in the return direction indicated by the arrow Y in FIG. 4 to return to the state before the operation. At this time, since the ratchet gear 45 is restricted from rotating leftward as indicated by the arrow L by the stopper 4, the locking portion 44 a moves along the inclined surface 45 i of the tooth T of the ratchet gear 45 along with the turning operation of the lever 11. To slide. For this reason, the lever 11 can be returned to the original position without rotating the ratchet gear 45. That is, the ratchet gear 45 rotates only in the right direction indicated by the arrow R with respect to the reciprocating motion of the lever 11.

  As the ratchet gear 45 rotates, the notch gear 46 rotates in the right direction indicated by the arrow R in FIG. 8A, and the notch portion 46a of the notch gear 46 also rotates in the right direction indicated by the arrow R. . As a result, based on the turning operation of the notch gear 46, the intermediate gear 53 meshed with the notch gear 46 rotates, and the second shaft 52 and the large gear 54 rotate integrally. Then, the small gear 63 and the third shaft 62 are rotated by the rotation of the large gear 54, and the rotating shaft 27 is rotated in the accumulation direction indicated by the arrow A as shown in FIG. Tightened. In this manner, the rotation of the first gear mechanism 41 and the second gear mechanism 51 is also restricted by the rotation of the ratchet gear 45 in the left direction indicated by the arrow L in FIG. Unintentional release of mechanical energy due to the restoring force of is suppressed. For this reason, even if the lever 11 is reciprocated, the same energy can be accumulated without reducing the mechanical energy of the mainspring 22.

  Furthermore, by continuing the reciprocating operation of the lever 11, the notch gear 46 rotates little by little, and the mechanical energy accumulated in the mainspring 22 also increases little by little. And the notch part 46a of the notch gear 46 is immediately before the intermediate gear 53, and the amount of contraction of the mainspring 22 and the accumulation of mechanical energy become maximum.

<When releasing mechanical energy>
When the notch 46a of the notch gear 46 reaches the intermediate gear 53 by the reciprocating operation of the lever 11, the engagement between the notch gear 46 and the intermediate gear 53 is released as shown in FIG. As a result, since the rotation restriction of the third gear mechanism 61 is released, the rotating shaft 27 rotates in the discharge direction indicated by the arrow B in FIG. That is, the mechanical energy accumulated in the mainspring 22 is released. As shown in FIG. 7, when the rotary shaft 27 rotates, the third shaft 62 rotates through the gear mechanism 23, and the magnet 73 disposed at the end of the third shaft 62 also rotates together. An induced current is generated at both ends of the coil 72 wound around the stator 71 based on a change in the magnetic field accompanying the rotation of the magnet 73. The induced current is rectified by the rectifier 75 and stored in the rechargeable battery 76 of the cellular phone as electrical energy via the connector 3. At this time, since the gear ratio of the gear mechanism 23 is set to an optimum gear ratio, the highest power generation efficiency is ensured.

<Effect of embodiment>
Therefore, according to the charging device 1 of the said embodiment, the following effects can be acquired.
(1) By reciprocating the lever 11 a plurality of times, the ratchet gear 45 can be rotated little by little, and the mainspring 22 can be contracted little by little. In this way, the operator can accumulate mechanical energy little by little. For this reason, it is possible to reduce the force related to one reciprocating operation of the lever 11, and it is possible to accumulate mechanical energy in the mainspring 22 with a small force.

  (2) A ratchet mechanism is constituted by the stopper 4, the pair of feed claws 44, 44 and the ratchet gear 45. For this reason, the ratchet gear 45 is restricted from rotating in the opposite direction (the left direction indicated by the arrow L in FIG. 4) by the stopper 4 of the ratchet mechanism. That is, when the mechanical energy is stored in the mainspring 22, the mechanical energy is not reduced by the unintentional release of the mainspring 22 by the ratchet mechanism. Therefore, it is possible to reliably prevent a decrease in mechanical energy stored in the mainspring 22.

  (3) The circumferential length of the notch gear 46 and the notch angle of the notch 46a are determined so that the meshing with the intermediate gear 53 is released when the mechanical energy accumulated in the mainspring 22 reaches just the required electrical energy. The length and the angle are set as described above. Therefore, on the condition that a preset amount of mechanical energy is stored in the storage means, the linkage between the notch gear 46 and the intermediate gear 53 is released and the mechanical energy stored in the mainspring 22 is released. Are automatically released. For this reason, it is not necessary to positively release the regulation of the mainspring 22 in order to release mechanical energy. Therefore, the mechanical energy stored in the mainspring 22 can be automatically released without complicating the configuration. Therefore, convenience can be improved.

  (4) The friction ratio generated when the gear ratio of the gear mechanism 23 releases the mechanical energy accumulated in the mainspring 22 and the power generation mechanism 70 (brushless motor) generated when converting the mechanical energy into electric energy. ) Is set in consideration of the frictional resistance. Therefore, it is possible to design (select) a gear mechanism 23 having an optimal gear ratio in consideration of a loss of mechanical energy.

(Other embodiments)
In addition, you may change the said embodiment as follows.
In the above embodiment, the spring 22 is used as the accumulating means, but an elastic member having elastic force such as a wire, rubber, or belt may be used.

  In the above embodiment, the notch gear 46 and the intermediate gear 53 are used as the linkage mechanism, but the following mechanism may be used. For example, a clutch mechanism may be used. In such a configuration, when accumulating the mechanical energy in the mainspring 22, the clutch mechanism is connected to enable the transmission mechanism 40 to rotate in the accumulating direction. On the condition that it has been accumulated, the clutch mechanism is released and the same mechanical energy is released.

  -Notch part 46a of notch gear 46 is not limited to one. That is, a plurality of notches 46 a may be formed in one notch gear 46. In such a configuration, the mechanical energy can be released a plurality of times by only rotating the notch gear 46 once.

  The rechargeable battery 76 may be built in the charging device 1. Then, the power supplied from the rechargeable battery 76 may be supplied to the outside via the connector 3. In the case of such a configuration, the electric energy generated by the power generation device 10 can be stored in the rechargeable battery 76. Therefore, it is possible to use electrical energy obtained by using mechanical energy in advance. For this reason, convenience can be improved.

  -The electric power generating apparatus 10 of the said embodiment is not limited to the charging device of the battery of a mobile telephone. For example, electric energy may be supplied to a radio, a flashlight or the like. Moreover, you may mount the electric power generating apparatus 10 in shoes. In such a configuration, simply by walking, electrical energy is automatically stored in the rechargeable battery 76, so convenience is improved.

In the above embodiment, the brushless motor power generation mechanism 70 is used as the power generation means, but a brush motor may be used. Even if it is a case where it is such a structure, an optimal gear ratio can be derived | led-out by utilizing the gear ratio of the gear mechanism 23 for Formula (1)-(5). In this case, it is necessary to consider the frictional resistance due to the contact between the brush and the commutator (commutator), by using the friction coefficient R ₂ of the motor in the equation (1), to derive a more optimal gear ratio Can do.

  -As shown with a dashed-two dotted line in FIG. 1, you may equip the front-end | tip of the lever 11 with the weight part 12a. The weight portion 12 a has a substantially hemispherical shape and reciprocates together with the lever 11. For example, the charging device 1 is arranged so that the weight portion 12a is located inside the heel of the shoe. When the user walks with the shoes on, the weight 12a performs a pendulum-like operation based on the walking operation. For this reason, mechanical energy can be stored in the mainspring 22 without operating the lever 11 by hand. Further, since the reciprocating operation of the lever 11 is promoted by the weight portion 12a, the lever 11 can be reciprocated even with a slight movement of the charging device 1. Further, since the mechanical energy can be gradually stored in the mainspring 22 with a smaller force in the one-way mechanism, the weight portion 12a can be made as small as possible, and thus the entire charging device 1 can be downsized.

  In the above embodiment, the lever 11 as the input means is rotated in the feed direction indicated by the arrow X in FIG. 4 to rotate the ratchet gear 45 to accumulate mechanical energy in the spring 22. You may change as follows. The ratchet gear 45 (see FIG. 1) may be rotated using a rack and pinion mechanism including a rack 110 and a first gear mechanism 131 as shown in FIG. Even in such a configuration, the mechanical energy can be accumulated in the mainspring 22 with a small force. Further, the rack 110 may be provided with a weight portion 12a.

The perspective view which shows the charging device in this embodiment. The front view which shows an electric power generating apparatus. The right view which shows an electric power generating apparatus. The top view which shows a ratchet mechanism. The top view which shows an electric power generating apparatus. (A) is a fragmentary sectional view which shows the mainspring mechanism of a mechanical energy storage state, (b) is a fragmentary sectional view which shows the state after mechanical energy discharge | release. The fragmentary sectional view which shows a power generation mechanism. (A) is a fragmentary sectional view which shows the linkage state of a linkage mechanism, (b) is a fragmentary sectional view which shows the cancellation | release state of a linkage mechanism. The graph which shows the relationship between power generation efficiency and a gear ratio. (A) is sectional drawing which shows the conventional electric power generating apparatus, (b) is the sectional view on the AA line of (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Charging device, 4 ... Stopper, 10 ... Power generation device (power generation means), 11 ... Lever (input means), 12a ... Weight part, 20 ... Spring mechanism (power storage means), 22 ... Spring, 23 ... Gear mechanism, 40 ... Transmission mechanism 41 ... First shaft (fulcrum), 44 ... Feeding claw (ratchet mechanism), 45 ... Ratchet gear (ratchet mechanism), 46 ... Notch gear (linkage mechanism and first transmission gear), 46a ... Notch 53 ... medium gear (linkage mechanism and second transmission gear), 62 ... third shaft (rotating shaft), 70 ... power generation mechanism (power generation means and motor), 76 ... rechargeable battery, N ... gear ratio, T ... teeth, E _M ... Mechanical energy.

Claims (8)

Accumulating means for storing and releasing mechanical energy, input means provided so as to be able to reciprocate, and movement of the input means in one direction while being linked to the accumulating means when storing the energy A transmission mechanism that transmits the energy to the storage unit based on the relationship between the energy storage unit and the storage unit when the energy is released, and a power generation unit that converts the mechanical energy released by the storage unit into electrical energy. A power generation device comprising:
The transmission mechanism includes a one-way mechanism that can be operated only in a direction in which mechanical energy is stored in the storage means,
A power generation apparatus characterized in that a predetermined amount of mechanical energy is divided and stored in the storage means by reciprocating the input means a plurality of times. The power generator according to claim 1,
The one-way mechanism is a ratchet gear that rotates in a storage direction of mechanical energy in the storage unit based on movement in one direction of the input unit;
A power generation device comprising a ratchet mechanism including a stopper that engages with teeth of the ratchet gear and restricts rotation of the ratchet gear in a direction opposite to the accumulation direction. In the electric power generating apparatus of Claim 1 or Claim 2,
The transmission mechanism allows the transmission mechanism and the storage means to be linked when storing the mechanical energy of the storage means, and the transmission mechanism and the storage means are linked when releasing the mechanical energy of the storage means. With a linkage mechanism to release,
The linkage mechanism releases the linkage between the transmission mechanism and the storage means at a timing when the preset amount of mechanical energy is stored in the storage means. In the electric power generating apparatus of Claim 3,
The linkage mechanism includes a first transmission gear and a second transmission gear that mesh with each other;
The first transmission gear rotates based on the reciprocating motion of the input means, and includes a notch part in which teeth are not formed.
The second transmission gear is linked to the storage means;
The notch is separated from the second transmission gear at a timing when the preset amount of mechanical energy is stored in the storage means, and the linkage between the first transmission gear and the second transmission gear is released. A power generator characterized by that. In the electric power generating apparatus of any one of Claims 1-4,
The power generator according to claim 1, wherein the input means is provided with a weight portion that promotes reciprocation of the input means. In the electric power generating apparatus of any one of Claims 1-5,
The accumulating means includes a spring formed in a spiral shape,
The power generation means includes a motor having a rotating shaft that performs rotational movement,
Between the rotating shaft of the motor and the spring, a gear mechanism that mechanically transmits the mechanical energy accumulated in the spring to the rotating shaft of the motor is provided.
The gear mechanism takes into account the frictional resistance generated in the mainspring when releasing the mechanical energy accumulated in the mainspring and the frictional resistance generated in the motor when converting the mechanical energy into electrical energy. A power generator characterized by setting a gear ratio. The power generator according to claim 5,
The input means is supported so as to be rotatable about a fulcrum,
The power generator according to claim 1, wherein the weight portion is provided at an end portion of the input means opposite to the fulcrum side and performs a pendulum motion together with the input means around the fulcrum. The power generator according to any one of claims 1 to 7,
A charging device comprising: a rechargeable battery that stores electrical energy obtained by the power generation means.

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