JP6369599B2 - Vibration generator - Google Patents

Description

  The present invention relates to a vibration generator that supplies electric power to, for example, various sensors mounted on a moving body and the like. More specifically, the present invention receives an external vibration and a magnet as a vibrator reciprocates in a coil to generate power. The present invention relates to a vibration generator.

Many sensors are mounted on various moving bodies such as automobiles and railway vehicles. In particular, in recent years, automobiles having hundreds of types of sensors have been produced in order to cope with safety and energy problems.
For example, with a TPMS (tire pressure monitoring system) that constantly monitors tire pressure, the sensor is installed inside the tire or wheel, the receiver is installed on the vehicle body, and the sensor detects it. The transmitted information is transmitted to the in-vehicle LAN via the receiving device, and an alarm is generated when it is determined that the tire air pressure is out of the specified range based on the information.

Since the sensor used in the above system is difficult to supply power from the outside of the tire, a battery that supplies power necessary for driving is used. However, in this case, it is often necessary to check or replace the battery.
Therefore, as a power supply source of a sensor installed in a tire or the like, instead of a battery, a vibration generator, particularly an electromagnetic induction vibration generator excellent in durability (see Patent Documents 1 and 2 below) It is possible to use it.

JP 2013-62984 A Japanese Patent No. 4469668

  However, when a sensor is mounted on a moving body, for example, an automobile, the direction of vibration applied to the vibration generator is not necessarily constant, and includes multidirectional vibration components. For example, when driving on an expressway, depending on the road surface conditions and acceleration / deceleration conditions, vibrations in the vertical direction or the front-rear direction are considered to be the main. The force (vibration) in the left-right direction is also applied. Also, when the tire slips, a force (vibration) in a direction corresponding to the slip is applied.

Depending on the prior art as described above, only vibration in one direction among vibrations in various directions applied to the vibration generator contributes to power generation, and effective power generation using vibrations in other directions can be performed. could not.
Further, in the field of vibration generators, there has been a demand for a reduction in the number of parts that can achieve compactness and cost reduction.

  This invention is made | formed in view of such a situation, and it aims at providing the vibration generator which can make the whole apparatus compact.

In order to achieve the above object, the first vibration generator of the present invention comprises:
Two vibration power generation units that intersect at 90 degrees and have the same shape;
In a space adjacent to the two vibration power generation units, a substrate on which circuit means for recovering AC power generated in the vibration power generation unit, rectifying and converting to DC power is mounted,
When each of the vibration power generation units imagines a square having a size along the inner side of each of the vertical and horizontal sides, and the rectangular parallelepiped is assumed by the square and a predetermined height, the vibration power generation units in the rectangular parallelepiped are arranged. Arranged to accommodate the board on which the circuit means is mounted in an unoccupied space ,
The two vibration power generation units each include a vibrator made of a magnet, a hollow bobbin containing the vibrator, and a coil wound around the hollow bobbin,
The two vibration power generation units are crossed at right angles and connected to each other, and the ends of the vibrators included in the two vibration power generation units have the same polarity toward the intersection .

In order to achieve the above object, the second vibration generator of the present invention includes:
Three vibration power generation units that intersect at 90 degrees and have the same shape,
In a space adjacent to the three vibration power generation units, a board on which circuit means for recovering AC power generated in the vibration power generation unit, rectifying and converting to DC power is mounted,
When each of the vibration power generation units imagines a cube having a size along the inside of each of the vertical, horizontal and height sides, the circuit means is provided in an empty space in which the vibration power generation unit is not arranged. It was arranged to accommodate the substrate mounting,
Each of the three vibration power generation units includes a vibrator made of a magnet, a hollow bobbin containing the vibrator, and a coil wound around the hollow bobbin,
The three vibration power generation units are connected at right angles to each other, and toward the intersection, the ends of the vibrators included in the three vibration power generation units have the same polarity .

A waterproof member covers an outer side or a gap of a case in which the virtual cuboid or the entire virtual cube in which the vibration power generation unit and the substrate are arranged is accommodated .

The vibration power generation unit receives a vibrator made of a magnet, a coil arranged on the outer periphery of the vibrator, and vibrations from the outside, and when the vibrator moves in the coil, the coil and the vibrator A hollow bobbin as an interference preventing member for preventing interference with the elastic member, and an elastic member arranged on one side of both ends of the moving direction of the vibrator to bias the vibrator to the other side. preferable.
Here, the interference between the coil and the vibrator means that smooth sliding between these members is prevented.
The other end of each of the vibrators in the vibration power generation unit is set to have the same polarity, and repulsion due to the same polarity occurs at the other end of each of the vibrators. The force and the spring constant of each elastic member in the vibration power generation unit are set in a balanced state so that the vibrator can reciprocate in the coil when subjected to the vibration. Preferably it is.
Here, the “spring constant” in the present application is not limited to a narrow meaning related to a so-called spring, and is widely used for an elastic body having an elastic function similar to that of a “spring”.

The vibrator is arranged such that a plurality of unit magnets are close to or in contact with each other in the moving direction of the vibrator, and the unit magnets face each other with the same pole facing each other. It is preferable that a plurality of unit coils are arranged so as to be close to each other in the moving direction of the vibrator, and the adjacent coils are wound in opposite directions.
It is preferable that the interference preventing member is formed of a hollow bobbin having flanges at both ends made of a nonmagnetic material, and the coil is wound around the bobbin.

It is preferable that the moving axes of the vibrators are configured to intersect at an angle perpendicular to each other.
The bobbin can be in a state in which the tip on the other side is closed.
The bobbin can be in a state in which the tip on the other side is opened.

Each of the bobbins is preferably connected to each other by a multi-axis connector at a position where the moving axes of the vibrator intersect.
It is preferable that each of the bobbins is integrally coupled at a position where the moving axes of the vibrator intersect.

  According to the first vibration generator of the present invention, each of the vibration power generation units virtually imagines a square having a size along the inner side of each of the vertical and horizontal sides, and a rectangular parallelepiped is assumed by this square and a predetermined height. And having a characteristic configuration in which the circuit board is mounted in an empty space in which the vibration power generation unit is not disposed in the rectangular parallelepiped, and two vibration power generation Since the unit and the substrate can be compactly accommodated in the case, the entire apparatus can be made compact.

  Further, according to the second vibration power generator of the present invention, when each of the vibration power generation units imagines a cube having a size along the inside of each one of the vertical, horizontal, and height sides, the vibration in the cube It has a characteristic configuration that it is arranged so that a board on which the circuit means is mounted is accommodated in an empty space where no power generation unit is arranged. Thus, the three vibration power generation units and the board are arranged in a case. Since it can be accommodated compactly, the entire apparatus can be made compact.

It is a schematic diagram which shows the external structure (A) and internal structure (B) of the vibration generator which concern on the 1st Embodiment of this invention. In the vibration generator according to the first embodiment of the present invention, a displacement of the entire device (hereinafter referred to as a casing) when vibration is applied, and a vibrator (X-axis direction) that vibrates on the X-axis based on this vibration FIG. 6 is a graph showing the displacement of the vibration power generation unit) and the displacement of the vibrator (Y-axis direction vibration power generation unit) that vibrates on the Y-axis based on the vibration, and a diagram showing the vibration direction of the housing in each case. ((A) is when the vibration direction of the housing is the X-axis direction, (B) is when the vibration direction of the housing is rotating from the X-axis direction and the Y-axis direction and vibrating in the direction of the arrow AB, (C) is a graph showing a case where the vibration direction of the housing rotates in the direction of the arrow AB by rotating from the X-axis direction and the Y-axis direction, respectively. It is the schematic which shows the circuit which synthesize | combines the electric power generated in each vibration power generation unit in the vibration power generator which concerns on the 1st Embodiment of this invention. Schematic (A) which shows the state which accommodated the vibration generator which concerns on the 1st Embodiment of this invention in the case, Schematic which shows the bobbin of the vibration generator which concerns on the 1st Embodiment of this invention (B) FIG. 2C is a schematic diagram (C) illustrating the vibrator of the vibration power generator according to the first embodiment of the present invention. It is a schematic diagram which shows the external structure (A) and internal structure (B) of the vibration generator which concern on the 2nd Embodiment of this invention. It is a schematic diagram which shows the internal structure of the vibration generator which concerns on a prior art.

Hereinafter, a vibration generator according to an embodiment of the present invention will be described with reference to the drawings.
<First Embodiment>
First, a vibration generator 1 according to a first embodiment of the present invention will be described with reference to FIG. 1A shows the external structure of the vibration power generation units 11 and 21, and FIG. 1B shows the internal structure of the vibration power generation units 11 and 21, respectively.

The vibration power generator 1 according to the first embodiment generates power using vibrations in two orthogonal biaxial directions, and generates power using X-axis vibrations. Unit 1
1 and a Y-axis direction vibration power generation unit 21 that generates power using vibrations in the Y-axis direction are configured to be orthogonal to each other.
Since these two vibration power generation units 11 and 21 have the same structure, the vibration power generation units 11 and 21 alone will be described with one vibration power generation unit 11 as a representative example.

  Each of the vibration power generation units 11 and 21 includes vibrators 14 and 24 including a plurality of rod-shaped permanent magnets 14a, 14b, 24a, and 24b (hereinafter sometimes referred to as permanent magnets 14a and the like), and vibrations thereof. A plurality of solenoid coils 12a, 12b, 12c, 22a, 22b, and 22c (hereinafter sometimes referred to as solenoid coils 12a, etc.) disposed on the outer circumferences of the sub-elements 14 and 24, and the vibrator 14 in the coils 12a and the like. , 24 when moving, the coil 12a and the like and the vibrators 14 and 24 are prevented from interfering with each other (in this specification, preventing smooth sliding), and the solenoid coil 12a and the like are wound. Bobbins 13 and 23 functioning as a core material for compression, and compression springs 16 and 26 arranged on one side of the bobbins 13 and 23 and biasing the vibrators 14 and 24 to the other side, Ranaru.

  The vibrators 14 and 24 are slidably moved in the bobbins 13 and 23 in the axial direction according to the detectable vibration, and a plurality of permanent magnets (for example, neodymium magnets) are connected to the same polarity end. The parts are opposed to each other so as to be opposed to each other (in the example of FIG. 1B, the S poles are opposed to each other).

  The vibrators 14 and 24 are provided with a plurality of permanent magnets 14a, 14b, 24a and 24b in order to increase power generation efficiency.

  Further, when the inner wall surface of the bobbins 13 and 23 and the vibrators 14 and 24 move relative to each other, the number of contact points and the number of collisions between the inner wall surfaces of the bobbins 13 and 23 and the vibrators 14 and 24 increase. Since the vibrations of the vibrators 14 and 24 are significantly attenuated, the vibrators 14 and 24 are held and accommodated in the hollow pipe, and at least one or both of the bobbins 13 and 23 and the hollow pipe are It is desirable to form with a material having a low coefficient of friction, such as polypropylene or polyacetal. By using such a material, the mutual friction between the inner wall surfaces of the bobbins 13 and 23 and the vibrators 14 and 24 can be greatly reduced.

  The solenoid coils 12a, 12b, 12c, 22a, 22b, and 22c are wound around the bobbins 13 and 23, and the three solenoid coils 12a and the like are alternately arranged on the bobbins 13 and 23. Is set to have a reverse polarity. That is, the winding direction of each solenoid coil 12a and the like is set to be the forward, reverse, and forward directions opposite to each other for each adjacent solenoid coil.

  Moreover, in order to prevent the vibrators 14 and 24 from popping out, both end portions of the bobbins 13 and 23 are fitted with end members formed of resin or the like. By inserting these end members, Both ends of 23 are closed. Then, in each vibration power generation unit 11, 21, when vibration in a corresponding direction occurs, the vibrators 14, 24 reciprocate in the winding axis direction inside the solenoid coil 12 a, etc. A voltage is induced in the coil 12a and the like, and an electromotive force is generated.

  Then, as will be described later, the voltages output from the vibration power generation units 11 and 21 can be increased by synthesizing the electromotive forces generated in the solenoid coils 12a and the like by matching the phases of the voltages with each other, as will be described later. .

By the way, in the conventional vibration power generator, only vibration in one direction among vibrations in various directions contributes to power generation, and vibrations in other directions cannot be used for power generation. Therefore, in the vibration generator of the present embodiment, not only vibrations in one direction but also vibrations in other directions contribute to power generation, and the vibration generator is more excellent in power generation efficiency (note that vibrations in two directions Although there is what is known as a vibration power generator for detecting the noise, its function is completely different from that of the present invention (see JP 2012-165561 A).

  That is, as described at the beginning of the description of the embodiment, in the vibration power generator of the present embodiment, the X-axis direction unit 11 that generates power using the vibration in the X-axis direction and the vibration in the Y-axis direction are used. Thus, the Y-axis direction vibration power generation unit 21 that generates electric power is disposed in a state orthogonal to each other.

  The movement axes of the vibrators 14 and 24 of the two vibration power generation units 11 and 21 intersect each other at 90 degrees at a predetermined position P1 on the other side of both ends in the movement direction of the vibrators 14 and 24, and By configuring the vibrators 14 and 24 in each of the vibration power generation units 11 and 21 so that the ends having the same polarity are directed toward the predetermined position P1, the repulsive forces that try to move the opponents away from each other are provided on the vibrators 14 and 24. As a result, the same effect as that obtained by providing a compression spring on the predetermined position P1 side of the vibration power generation units 11 and 21 can be obtained.

In addition, the repulsive force generated by the same polarity between the vibrators 14 and 24 on the predetermined position P1 side is the vibration between the spring constants of the compression springs 16 and 26 in the two vibration power generation units 11 and 21. When influenced, the vibrators 14 and 24 are set in a balanced state so that they can reciprocate in the solenoid coils 12a and the like.
That is, by adjusting the repulsive force and the spring constant, the reciprocating movement of the vibrators 14 and 24 according to the external vibration can be continuously performed.

  That is, according to the above-described conventional vibration generator 211, as shown in FIG. 6, the vibrators 214 in the bobbin 213 around which the solenoid coils 212a, 212b, and 212c are wound, In either case, the suspension is suspended by the compression springs 216a and 216b.

  On the other hand, in the vibration power generator 1 of the present embodiment (the present invention), the vibrators 14 and 24 in the bobbins 13 and 23 are suspended by the compression springs 16 and 26 on one side of both ends in the moving direction. However, on the other side, no special suspension means such as a compression spring is provided, and each repulsive force (interaction) caused by the same polarity is generated on the predetermined position P1 side of each vibrator 14, 24. A function of suspending the vibrators 14 and 24 is given.

  This eliminates the need for the compression springs 16 and 26 disposed on the predetermined position P1 side of the vibrators 14 and 24 as compared with the prior art, and can reduce the number of parts, and each vibration power generation unit 11, Power generation is performed at 21, and by combining these, it is possible to configure the vibration power generator 1 that is more efficient than before.

  In the vibration power generator of this embodiment, the repulsive force and the spring constants of the compression springs 16 and 26 in the vibration power generation units 11 and 21 are set in a balanced state, and the vibration power generation unit 11, In each of the elements 21, the vibrators 14 and 24 are configured to reciprocate with the midpoint of the area of the solenoid coil 12a or the like as a reference position.

The movement of each of the vibrators 14 and 24 differs depending on how much the vibration with respect to the apparatus housing is rotated with respect to the X axis and the Y axis.
For example, when the vibration is in such a direction that vibration is detected only in one of the vibration power generation units (in this case, the X-axis direction vibration power generation unit 11), first, the vibrator of the X-axis direction vibration power generation unit 11 14 reciprocates in the winding axis direction (here, the X-axis direction). The vibrator 14 of the X-axis vibration power generation unit 11 and the vibrator 24 of the Y-axis vibration power generation unit 21 Since both are in a state where the same polarity end portion is directed to the predetermined position P1 side, they are in a state of repelling each other. For this reason, when the vibrator 14 of the X-axis direction vibration power generation unit 11 approaches the predetermined position P1, the vibrator 24 of the Y-axis direction vibration power generation unit 21 moves on the Y axis so as to move away from the predetermined position P1.

  Thereafter, the vibrator 24 passes through the solenoid coils 22a, 22b, and 22c and further advances. Then, the compression spring 26 is gradually compressed to increase the urging force in the direction of the predetermined position P1, the direction of travel of the vibrator 24 is reversed, and proceeds on the Y axis toward the predetermined position P1. It passes through the coils 22c, 22b, 22a and reaches a position close to the predetermined position P1. At this time, if the vibrator 14 of the X-axis vibration power generation unit 11 is reciprocating so as to approach the predetermined position P1, the vibrator 24 of the Y-axis vibration power generation unit 21 performs the reciprocation in the Y-axis direction. Will repeat again.

  Thus, according to the vibration generator of the present embodiment, even if the vibration in the Y-axis direction is zero or very small, it is based on the interaction with the reciprocating movement of the vibrator 14 of the X-axis vibration power generation unit 11. Thus, the vibrator 24 of the Y-axis direction vibration power generation unit 21 is reciprocated, and an electromotive force is generated from the Y-axis direction vibration power generation unit 21.

  FIG. 2 (A) shows that when vibration in the X-axis direction is generated in the apparatus housing in this way, based on the interaction between the X-axis vibration power generation unit 11 and the Y-axis vibration power generation unit 21, This shows how the vibrator 24 of the axial vibration power generation unit 21 is reciprocated.

  Also, the graph of FIG. 2A shows the displacement of the entire apparatus (hereinafter referred to as the apparatus housing) when vibration is applied, and the vibration of the X-axis direction vibration power generation unit 11 that vibrates on the X axis based on this vibration. The phase relationship between the displacement of the child 14 and the displacement of the vibrator 24 of the Y-axis direction vibration power generation unit 21 that vibrates on the Y axis based on this vibration is shown. The horizontal axis indicates time (arbitrary unit), and the vertical axis indicates displacement (arbitrary unit).

  According to this graph, when the vibration direction of the device casing is the X-axis direction, the displacement waveform (square dot line) of the vibrator 24 of the X-axis direction vibration power generation unit 11 is the vibration waveform ( (Practice) is exactly the opposite phase. Further, in this case, the displacement waveform (triangle ▲ dot line) of the vibrator 24 of the Y-axis direction vibration power generation unit 21 is slightly delayed from the vibration waveform (solid line) of the apparatus housing. In any case, due to the housing vibration in the X-axis direction, the vibrator 24 of the Y-axis vibration power generation unit 21 can reciprocate in addition to the vibrator 14 of the X-axis vibration power generation unit 11 to generate power. it is obvious.

Similarly, FIG. 2B shows a case where the vibration direction of the apparatus housing is a direction that rotates by a predetermined angle from the X axis and the Y axis, respectively.
According to the graph of FIG. 2 (B), the displacement waveform (square dot line) of the vibrator 14 of the X-axis direction vibration power generation unit 11 and the displacement waveform of the vibrator 24 of the Y-axis direction vibration power generation unit 21 ( The triangle ▲ dot line (shown by overlapping with the square dot line) is in exactly the opposite phase to the vibration waveform (solid line) of the device housing. In this way, the housing vibration in the direction rotated 45 degrees clockwise from the X axis and −45 degrees clockwise from the Y axis causes the vibrator 14 of the X axis direction vibration power generation unit 11 and the Y axis direction vibration power generation. It is clear that all of the vibrators 24 of the unit 21 reciprocate and generate power while affecting each other.

Similarly, FIG. 2C shows a case where the vibration direction of the apparatus housing is rotated by a predetermined angle from the X axis and the Y axis, respectively.
According to the graph of FIG. 2C, the displacement waveform (square dot line) of the vibrator 14 of the X-axis direction vibration power generation unit 11 is just in reverse phase with the vibration waveform (solid line) of the device casing. On the other hand, the displacement waveform (triangle ▲ dot line) of the vibrator 24 of the Y-axis direction vibration power generation unit 21 is exactly in phase with the vibration waveform (solid line) of the apparatus housing.

  The vibrator 14 of the X-axis direction vibration power generation unit 11 and the Y-axis direction vibration power generation are caused by the housing vibration in the direction rotated clockwise by −45 degrees from the X axis and 45 degrees clockwise from the Y axis. It is clear that all of the vibrators 24 of the unit 21 reciprocate and generate power while affecting each other.

  In addition, as shown in FIG. 2A, in the case vibration only in the direction of one axis (X axis or Y axis), the power is apparently generated by the two vibration power generation units 11 and 21, Since a part of one vibration energy is divided as the other vibration energy, the total power generation amount does not increase.

However, as shown in FIGS. 2B and 2C, the vibration in the direction rotated by a predetermined angle from the X axis and the Y axis is decomposed into an X axis direction component and a Y axis direction component of the vibration. Since each component is detected in the corresponding vibration power generation unit 11, 21 and can be generated as described above, the total amount of power totaled by the power generated in each vibration power generation unit 11, 21 is The vibration can be converted into electric power more efficiently than in the case of a conventional vibration generator that detects only vibration in one direction.
This is particularly effective when trying to simultaneously contribute to power generation in a plurality of directions.

Next, a schematic configuration of the internal circuit of the vibration generator 1 will be described with reference to a block diagram shown in FIG.
As shown in FIG. 3, the solenoid coils 12 a, 12 b, 12 c of the X-axis direction vibration power generation unit 11 are connected in series, and the AC power generated in each is sequentially input to the AC power input unit 17. .
The solenoid coils 22a, 22b, and 22c of the Y-axis direction vibration power generation unit 21 are also connected in series, and the AC power generated in each is sequentially input to the AC power input unit 27.

Thereafter, the AC power input to the AC power input units 17 and 27 is converted into DC power by the rectifier circuits 18 and 28 and output from the DC power output units 19 and 29, respectively. At this time, since the DC power output units 19 and 29 are connected in parallel to each other, their voltages are combined with each other and supplied to the load 4.
In addition, in order to prevent the alternating current power from the said alternating current power input parts 17 and 27 from interfering with each other, it is necessary to synthesize | combine after rectifying with the semiconductor element in the rectification parts 17 and 27. FIG.

  In order to increase the amount of generated power, a method of increasing the number of solenoid coils 22a and the like of each vibration power generation unit 11, 21 is conceivable. However, the DC resistance of the coil increases in proportion to the number of coils, and the voltage Since the drop becomes large, if the number of coils is increased too much, electric power cannot be obtained efficiently. Therefore, from such a viewpoint, it is important to appropriately determine the number of efficient coils. In addition, it is important to determine the number of permanent magnets 14a and the like constituting the vibrators 14 and 24 as appropriate from the viewpoint that the generated power can be efficiently obtained.

Next, FIG. 4A shows a state in which the vibration generator 1 according to the present embodiment is efficiently accommodated in a box-shaped case.
In FIG. 4A, the X-axis direction vibration power generation unit 11 and the Y-axis direction vibration power generation unit 21 are configured to have the same shape. These vibration power generation units 11 and 2
1 so that they intersect at right angles to each other at one end (or on an extension thereof), and in this state, the side outlines of the vibration power generation units 11 and 21 are along the vertical and horizontal sides, and When a virtual square including these vibration power generation units 11 and 21 is assumed, and a virtual rectangular parallelepiped is assumed based on the virtual square and a predetermined height, an empty space where the vibration power generation units 11 and 21 of the virtual rectangular parallelepiped are not arranged. And a substrate on which the circuit means 41 is mounted.

That is, a substrate 41 (through hole 41a is shown) on which a X-axis direction vibration power generation unit 11, a Y-axis direction vibration power generation unit 21, and circuit elements are mounted in a case 51 having a size corresponding to the virtual rectangular parallelepiped. Accommodate. As shown in FIG. 4B, each of the bobbins 13 and 23 is divided into three coil winding portions with an outer surface having a middle collar, and three solenoid coils 22a, 22b, 22c, 12a, 12b and 12c are wound so as to be close to each other. Each of the three solenoid coils 22a, 22b, 22c, 12a, 12b, and 12c is sequentially connected in series, but the winding direction is configured to be normal, reverse, and positive as described above. Yes.
Further, as shown in FIG. 4 (C), vibrators formed by bonding the permanent magnets 14a and 24a and the permanent magnets 14b and 24b to the hollow portions in the bobbins 13 and 23 so that the same poles face each other. 14 and 24 are movably inserted into the bobbins 13 and 23, respectively.

  As described above, the X-axis direction vibration power generation unit 11 and the Y-axis direction vibration power generation unit 21 are accommodated along one side in the vertical direction and the horizontal direction of the case 51, and the square empty space in the case 51 is stored. The substrate 41 is exactly accommodated. The height of the case is at least the higher of the height of each of the vibration power generation units 11 and 21 and the height of the substrate 41 (including the height of the mounted element).

  According to the vibration power generator 1 of the present embodiment, the two vibration power generation units and the substrate 41 can be accommodated in the case 51 in a compact manner, so that the entire apparatus can be made compact.

  Further, if each member is accommodated in the case 51 or the like and then the outer surface is covered with a waterproof resin so as to fill the gap, the vibration generator 1 as a whole needs to be waterproofed (for example, to TPMS) This is effective when installed around the wheel for power supply. As such a resin, for example, a silicone sealant can be used.

<Second Embodiment>
Next, a vibration power generator 101 according to a second embodiment of the present invention will be described with reference to FIG. 5A shows the external structure of the vibration power generation units 111, 121, and 131, and FIG. 5B shows the internal structure of the vibration power generation units 111, 121, and 131, respectively.

  The vibration power generator 101 according to the second embodiment generates power using vibrations in three orthogonal directions, and generates power using X-axis vibrations. The unit 111, the Y-axis direction vibration power generation unit 121 that generates power using vibration in the Y-axis direction, and the Z-axis direction vibration power generation unit 131 that generates power using vibration in the Z-axis direction are arranged in a state orthogonal to each other. It is configured.

  These three vibration power generation units 111, 121, and 131 have the same configuration as each other, and are similar to the configuration of the vibration power generation units 11 and 21 in the first embodiment described above. , 131 will not be described in detail. In this case, a member having the same function as the member of the first embodiment is denoted by a symbol obtained by adding 100 to the member of the first embodiment.

  The movement axes of the vibrators 114, 124, and 134 of the three vibration power generation units 111, 121, and 131 cross each other at 90 degrees at a predetermined position P2 on the other side of both ends in the movement direction of the vibrators 114, 124, and 134. And the vibrators 114, 124, 134 in each of the vibration power generation units 111, 121, 131 are configured so that the end portions of the same polarity are directed to the predetermined position P2 side. A repulsive force that tries to move the opponents away from each other is generated, whereby the same effect as that obtained by providing a compression spring on the predetermined position P2 side of the vibration power generation units 111, 121, 131 is obtained. That is, the compression springs on the predetermined position P2 side of the vibration power generation units 111, 121, and 131 can be reduced, which can contribute to the downsizing and cost reduction of the apparatus.

The vibration generator 101 according to the second embodiment has the same basic concept as the vibration generator 1 according to the first embodiment, but differs in that it uses three-dimensional vibration instead of two-dimensional. To do.
In other words, the first power generation is performed using not only the X-axis vibration power generation unit 111 and the Y-axis vibration power generation unit 121 but also the Z-axis vibration power generation unit 131 and using the vibration in the Z-axis direction. It is possible to obtain a vibration generator that is more excellent in power generation efficiency than that of the embodiment.

  The configuration of the internal circuit of the vibration power generator 101 is basically the same as the block diagram shown in FIG. 3, but the Z-axis vibration power generation unit 131 is added. The generated power is also synthesized. That is, the solenoid coils 132a, 132b, and 132c are connected in series, and the AC power generated in each is input to the AC power input unit in the same manner as the other vibration power generation units 111 and 121, and each DC power is supplied to the rectifier circuit. It is converted into electric power and output from the DC power output unit. At this time, since the DC power output unit is connected in parallel to the DC power output units 19 and 29 of the X-axis direction vibration power generation unit 111 and the Y-axis direction vibration power generation unit 121, their output voltages are combined with each other. Will be supplied to the load.

In the vibration power generator 101 according to the second embodiment, the X-axis direction vibration power generation unit 111, the Y-axis direction vibration power generation unit 121, and the Z-axis direction vibration power generation unit 131 are identical to each other in addition to their functional configurations. It is comprised so that a shape may be made. These vibration power generation units 111, 121, 131 are made to intersect at right angles with each other at one end portion (or on an extension line thereof), and in this state, the side outlines of the vibration power generation units 111, 121, 131 are vertically When the virtual cube is assumed to be along the one side of the horizontal and the horizontal, and the vibration power generation units 111, 121, 131 are included, the vibration power generation unit 111 is placed in the empty space of the virtual cube. , 121 and 131 are accommodated on a substrate on which circuit means is mounted.
In the second embodiment, a drawing corresponding to FIG. 4A shown in the first embodiment is not provided. However, referring to FIG. 4A, the connecting portion of the two bobbins 13 and 23 However, it differs from the thing of 1st Embodiment by the point by which the Z-axis direction vibration electric power generation unit 131 is arrange | positioned so that it may extend in a paper surface depth direction.

  That is, by the case (51) corresponding to the virtual cube, the substrate (41) on which the X-axis direction vibration power generation unit 111, the Y-axis direction vibration power generation unit 121, the Z-axis direction vibration power generation unit 131, and the circuit element are mounted. Accommodate.

In this way, the X-axis direction vibration power generation unit 111, the Y-axis direction vibration power generation unit 121, and the Z-axis direction vibration power generation unit 131 are arranged along one side of the vertical direction, the horizontal direction, and the height direction of the case (51). The substrate (41) is stored in a square empty space in the case (51).

  According to the vibration power generator 101 of the present embodiment, the three vibration power generation units 111, 121, 131 and the substrate (41) can be accommodated in the case (51) in a compact manner, so that the entire apparatus can be made compact. Can do.

  Further, if each member is accommodated in the case (51) or the like and then the outside is covered with a waterproof resin to fill the gap, the vibration generator 101 as a whole can have a waterproof effect.

<Modification example>
The characteristics of the vibration power generation units described above may not be the same as each other, for example, depending on the strength and directionality of vibration applied to the device housing (acceleration change of the mobile body when mounted on the mobile body). Thus, the spring constant and the strength of the magnetic energy of the magnet can be appropriately varied.

Further, as the elastic body, not only a compression spring but also other springs and other elastic bodies such as a rubber-like material can be used. As a magnetic body constituting the vibrator, various other than a neodymium magnet can be used. The magnetic material can be used.
Further, when a plurality of magnets forming the vibrator are formed, the plurality of magnets may be in contact with each other, or may be opposed to each other with a minute interval.

In the vibration power generator of the present invention, the bobbin of the vibration power generation unit may have a closed pipe shape or an open pipe shape at the end where the moving axes of the vibrators intersect. It may be said. If the bobbin is in the shape of a closed pipe, it is possible to prevent the possibility of jumping outside when the vibrator moves.
Further, in a region where the moving axes of the vibrators intersect, a multi-axis connector that can be coupled to the end portions of the bobbins of the vibration power generation units and close the plurality of end portions may be provided. In this case, the manufacturing and assembling process can be simplified.
Further, in the region where the movement axes of the vibrators intersect, the end portions of the bobbins of the vibration power generation units may be combined and integrated. Also in this case, the manufacturing process can be simplified.

1, 101, 211 Vibration generator 4 Load 11, 111 X-axis direction vibration power generation unit 12, 22, 112, 122, 132, 212 Coil group 12a, b, c, 22a, b, c, 112a, b, c, 122a, b, c, 132a, b, c, 212a, b, c Solenoid coils 13, 23, 113, 123, 133, 213 Bobbins 14, 24, 114, 124, 134, 214 Vibrators 14a, b, 24a, b, 114a, b, 124a, b, 134a, b, 214a, b
Permanent magnets 16, 26, 116, 126, 136, 216a, b Compression springs 17, 27 AC power input unit 18, 28 Rectification unit 19, 29 DC voltage output unit 21, 121 Y-axis direction vibration power generation unit 41 Substrate 41a Through hole 51 Case 131 Z-axis direction vibration power generation unit

Claims (12)

Two vibration power generation units that intersect at 90 degrees and have the same shape;
In a space adjacent to the two vibration power generation units, a substrate on which circuit means for recovering AC power generated in the vibration power generation unit, rectifying and converting to DC power is mounted,
When each of the vibration power generation units imagines a square having a size along the inner side of each of the vertical and horizontal sides, and the rectangular parallelepiped is assumed by the square and a predetermined height, the vibration power generation units in the rectangular parallelepiped are arranged. Arranged to accommodate the board on which the circuit means is mounted in an unoccupied space ,
The two vibration power generation units each include a vibrator made of a magnet, a hollow bobbin containing the vibrator, and a coil wound around the hollow bobbin,
2. The vibration power generator characterized in that the two vibration power generation units are connected to each other at right angles so that the ends of the vibrators included in the two vibration power generation units have the same polarity toward the intersection . Three vibration power generation units that intersect at 90 degrees and have the same shape,
In a space adjacent to the three vibration power generation units, a board on which circuit means for recovering AC power generated in the vibration power generation unit, rectifying and converting to DC power is mounted,
When each of the vibration power generation units imagines a cube having a size along the inside of each of the vertical, horizontal and height sides, the circuit means is provided in an empty space in which the vibration power generation unit is not arranged. It was arranged to accommodate the substrate mounting,
Each of the three vibration power generation units includes a vibrator made of a magnet, a hollow bobbin containing the vibrator, and a coil wound around the hollow bobbin,
The vibration generator according to claim 3, wherein the three vibration power generation units are connected to each other at right angles, and the ends of the vibrators included in the three vibration power generation units have the same polarity toward the intersection .   3. The outer side or the gap of the case in which the vibration power generation unit and the substrate are arranged and the virtual cuboid or the entire virtual cube can be accommodated is covered with a waterproof member. Vibration generator. The vibration power generation unit receives a vibrator made of a magnet, a coil arranged on the outer periphery of the vibrator, and vibrations from the outside, and when the vibrator moves in the coil, the coil and the vibrator A hollow bobbin as an interference preventing member for preventing interference with the elastic member, and an elastic member arranged on one side of both ends in the moving direction of the vibrator to bias the vibrator to the other side. The vibration generator according to any one of claims 1 to 3 , wherein The other end of each of the vibrators in the vibration power generation unit is set to have the same polarity, and repulsion due to the same polarity occurs at the other end of each of the vibrators. The force and the spring constant of each elastic member in the vibration power generation unit are set in a balanced state so that the vibrator can reciprocate in the coil when subjected to the vibration. The vibration generator according to claim 4 , wherein The vibrator is arranged so that a plurality of unit magnets are close to or in contact with each other in the moving direction of the vibrator, and the unit magnets face the same pole.
The coil is configured so that a plurality of unit coils are close to each other in the moving direction of the vibrator, and adjacent coils are wound in opposite directions. The vibration generator according to claim 4 or 5 . The interference prevention member comprises a hollow bobbin having flanges at both ends made of a nonmagnetic material,
The vibration generator according to any one of claims 4 to 6 , wherein the coil is wound around the bobbin. The vibration generator according to any one of claims 4 to 7 , wherein moving axes of the vibrators are configured to intersect at an angle orthogonal to each other. The vibration generator according to claim 7 or 8 , wherein the bobbin is in a state in which the tip on the other side is closed. The vibration generator according to claim 7 or 8 , wherein the bobbin is in a state in which the tip on the other side is opened. The vibration power generation according to any one of claims 7 , 8, and 10 , wherein each of the bobbins is connected to each other by a multi-axis connector at a position where the moving axes of the vibrator intersect. Machine. Each of said bobbin at a position where the movement axis of the vibrator intersects the vibration generator according to any one of claims 7, 8 and 10, characterized in that it is integrally connected.