JP7660868B2 - Vibration dynamo device and dynamo device with switch mechanism - Google Patents

Description

This invention relates to a vibration dynamo device and a dynamo device with a switch mechanism.

Conventionally, there are various power generation methods for converting vibrational energy into electrical energy, including a method using electromagnetic induction, a method using a piezoelectric element, and a method using electrostatic induction. The method using electromagnetic induction uses vibration to change the relative position between a coil and a magnet, and generates power by the electromagnetic induction that occurs in the coil. Examples of such technologies include JP 2011-78197 A (Patent Document 1) and JP 2002-281727 A (Patent Document 2).

Patent document 1 discloses a power generating device in which a resilient buffer is provided inside the movement restriction parts provided at both ends of the cylindrical member to prevent damage caused by contact between the permanent magnets and the movement restriction parts.

Patent document 2 discloses a vibration generator in which permanent magnets are provided at both ends of a cylindrical member and a cushioning member serving as a rubber pad is provided on the inside of the permanent magnet.

JP 2011-78197 A JP 2002-281727 A

The power generation devices of Patent Documents 1 and 2 have a problem of poor power generation efficiency, and this problem has been addressed. In other words, the present invention aims to provide a vibration dynamo device and a dynamo device with a switch mechanism that improve power generation efficiency.

The vibration dynamo device according to one aspect of the present invention comprises a non-magnetic cylindrical member having an internal space and open at both ends, a coil arranged on the outer periphery of the cylindrical member, a magnet arranged in the internal space of the cylindrical member and capable of reciprocating along the extension direction of the cylindrical member, and a pair of sheet materials that include outer edge portions fixed to both ends of the cylindrical member in the extension direction and a central portion facing the internal space of the cylindrical member and that are elastically flexibly deformable along the extension direction of the cylindrical member.

Preferably, the inner diameter side wall surface of the tubular member that forms the internal space includes a first region having a first inner diameter dimension and a second region having a second inner diameter dimension larger than the first inner diameter dimension and positioned so as to sandwich the first region, and the sheet material is fixed to the second region.

Preferably, the tubular member includes a first tubular body whose two end lengths are defined by a pair of sheets of material, and a second tubular body connected to the first tubular body via the sheet material.

Preferably, the second cylindrical body is provided with a lid portion that closes its outer end.

Preferably, the sheet material includes a ring portion constituting the outer edge, and a central portion and a rib portion constituting the central portion, the central portion being located at the center of the ring portion and spaced apart from the ring portion, and the rib portions are provided in plurality and connect the ring portion and the central portion.

Preferably, the magnet is cylindrical.

Preferably, the lid portion has a repulsive magnet that repels the magnet.

The dynamo device with switch mechanism according to one aspect of the present invention includes a dynamo device including a cylindrical member made of a non-magnetic material and having an internal space and open at both ends, a coil arranged on the outer periphery of the cylindrical member, a first magnet arranged in the internal space of the cylindrical member and capable of reciprocating along the extension direction of the cylindrical member, a pair of sheet materials having outer edges fixed to both ends in the extension direction of the cylindrical member and a central portion facing the internal space of the cylindrical member and capable of elastically flexing and deforming along the extension direction of the cylindrical member, and a switch mechanism arranged outside the cylindrical member, including a second magnet that acts on the first magnet and is displaceable between a first position and a second position, and the first magnet moves in the extension direction of the cylindrical member as the second magnet is displaced from the first position to the second position.

Preferably, multiple dynamo devices are provided at positions where the second magnet of the switch mechanism acts on the first magnet.

The vibration dynamo device and the dynamo device with a switch mechanism of the present invention can improve power generation efficiency.

1 is a cross-sectional view showing a schematic diagram of a vibration dynamo device according to a first embodiment of the present invention; 2A and 2B are diagrams showing a sheet material in accordance with the first embodiment of the present invention, in which (a) is a plan view and (b) is a cross-sectional view taken along line IIb-IIb in FIG. 2A. 1 is a schematic circuit diagram of a chime device using a vibration dynamo device according to a first embodiment of the present invention. 3A to 3C are diagrams illustrating the operation of the vibration dynamo device according to the first embodiment of the present invention. 10 is a cross-sectional view showing a schematic diagram of a vibration dynamo device according to a second embodiment of the present invention. FIG. FIG. 13 is a plan view showing a modified example of the sheet material. FIG. 11 is a plan view showing another modified example of the sheet material. A cross-sectional view showing a schematic diagram of a dynamo device with a switch mechanism according to a third embodiment of the present invention. 13A to 13C are diagrams illustrating the operation of a dynamo device with a switch mechanism according to a third embodiment of the present invention. A cross-sectional view showing a schematic diagram of a modified example of a dynamo device with a switch mechanism according to embodiment 3 of the present invention.

The embodiment of the present invention will be described in detail with reference to the drawings. Note that the same or corresponding parts in the drawings are given the same reference numerals and their description will not be repeated.

<First embodiment>
A schematic configuration of a vibration dynamo device 1 according to an embodiment of the present invention will be described with reference to Figures 1 and 2. In Figure 1, the direction indicated by arrow A1 is the up-down direction, and the direction indicated by arrow A2 is the left-right direction.

The vibration dynamo device 1 of this embodiment comprises a cylindrical member 10, a coil 30 arranged on the outer periphery of the cylindrical member 10, a magnet 40 arranged in the internal space of the cylindrical member, and a pair of sheet materials 50 provided at both ends of the cylindrical member 10 in the extension direction.

The cylindrical member 10 has an internal space and is open at both ends. The cylindrical member 10 is a hollow rod with both ends open. The cylindrical member 10 of this embodiment extends in the left-right direction in FIG. 1.

The cylindrical member 10 is made of a non-magnetic material. A non-magnetic material is a material that is not ferromagnetic, and includes paramagnetic materials, diamagnetic materials, and antiferromagnetic materials. Examples of non-magnetic materials include metals such as aluminum, and synthetic resins such as plastic.

The cylindrical member 10 includes a first cylindrical body 11 and a second cylindrical body 21 provided at both ends of the first cylindrical body 11. The length of both ends of the first cylindrical body 11 is determined by a pair of sheet materials 50. The second cylindrical body 21 is connected to both ends of the first cylindrical body 11, with the sheet materials 50 sandwiched between them.

As described above, the first cylindrical body 11 is hollow and rod-shaped, and includes a first outer diameter side wall surface 12, which is the outer circumference, and a first inner diameter side wall surface 13, which is the inner circumference. The shape (outer shape) of the first outer diameter side wall surface 12 and the first inner diameter side wall surface 13 (inner shape) are not particularly limited, and examples include a circle or a rectangle in cross section. The outer shape and inner shape of the cylindrical member 10 of this embodiment are circular in cross section. The inner diameter (diameter of the hollow shape) of the cylindrical member 10 of this embodiment is slightly larger than the outer diameter of the magnet 40 described below.

The first inner diameter side wall surface 13 has a first region 14 and a second region 15 that is larger in inner diameter than the first region 14. The first region 14 is located in the center, and the second region 15 is located so as to sandwich the first region 14. A step is provided between the first region 14 and the second region 15. In addition, a first internal space 17 in which a magnet 40 is disposed is provided within these regions 14 and 15.

A plurality of pins 16 may be provided on both ends of the first cylindrical body 11, protruding outward and penetrating the sheet material 50 and the second cylindrical body 21. The first cylindrical body 11 may also be provided with air holes 18 penetrating from the second region 15 of the first inner diameter side wall surface 13 toward the first outer diameter side wall surface 12.

A second cylindrical body 21 is provided at both ends of the first cylindrical body 11. The second cylindrical body 21 is cylindrical, and therefore includes a second outer diameter side wall surface 22, which is the outer circumference, and a second inner diameter side wall surface 23, which is the inner circumference. The second outer diameter side wall surface 22 is flush with the first outer diameter side wall surface 12. Similarly, the second inner diameter side wall surface 23 is flush with the second region 15 of the first cylindrical body 11. The second cylindrical body 21 is provided with a pin hole portion 24 through which the multiple pins 16 of the first cylindrical body 11 pass. A second internal space 25 is provided within the second inner diameter side wall surface 23. Unlike the first internal space 17 of the first cylindrical body 11, the second internal space 25 does not include a magnet 40. The second internal space 25 is a space for allowing the sheet material 50 to bend and deform.

The second cylindrical body 21 is provided with a lid portion 26 that closes its outer end. The lid portion 26 is made of a non-magnetic material such as plastic or synthetic resin. In this embodiment, the lid portion 26 is a rubber plate.

A coil 30 is wound around the first outer diameter side wall surface 12 of the first cylindrical body 11. Therefore, the cylindrical member 10 also serves as a bobbin for the coil 30. In this embodiment, the coil 30 is provided in the center of the cylindrical member 10. The coil 30 is, for example, a solenoid coil.

A magnet 40 is provided in the first internal space 17 of the first cylindrical body 11 so as to be capable of reciprocating motion along the extension direction of the cylindrical member 10 (the left-right direction of the arrow A2 in FIG. 1). Since the coil 30 is disposed on the outer periphery of the cylindrical member 10, the magnet 40 reciprocates inside the coil 30. The reciprocating motion of the magnet 40 causes the coil 30 to generate a voltage. In other words, the magnet 40 reciprocates along the winding axis direction of the coil 30, generating an alternating current in the coil 30.

The magnet 40 is, for example, a cylinder or a sphere. Note that sphere and cylinder refer to those with a spherical or cylindrical outer shape, including those with a hollow interior. Furthermore, the cylinder includes a cylindrical body, a rectangular prism, a disk shape, etc., and in this embodiment, it is a cylinder. When the magnet 40 is a sphere, it is preferable to provide multiple magnets.

The magnet is a permanent magnet. The magnet is magnetized in the direction of reciprocating motion (axial direction). There are no particular limitations on the magnetization method, but an example is a method in which a magnetic material is fixed to the center of an air-core coil and a high pulse current is passed through it to magnetize it in the axial direction. There are no particular limitations on the material of the magnet, but it is preferable to use a Nd-Fe-B sintered magnet in terms of its high magnetic force.

A pair of sheet materials 50 are provided at both ends of the first cylindrical body 11 of the cylindrical member 10. The pair of sheet materials 50 close the opening of the first cylindrical body 11. The sheet material 50 can be elastically flexed and deformed along the extension direction of the cylindrical member 10. The sheet material 50 is a non-magnetic material, and examples of the material include metals such as aluminum and synthetic resins such as plastic. In this embodiment, the sheet material 50 is a plate-shaped rubber or elastomer, and is preferably a synthetic rubber such as silicone rubber, taking into account ozone degradation, etc.

The sheet material 50 varies depending on the external size of the magnet 40, but from the viewpoint of ease of bending deformation, it is preferable that it is thin, and the thickness is, for example, 0.1 mm to 1 mm, and preferably 0.1 mm to 0.6 mm. If it is less than 0.1 mm, it is poorly moldable, and if it exceeds 1 mm or 0.6 mm, it is difficult to bend. In addition, the hardness of the sheet material 50 is, for example, 20° to 70° in durometer A hardness, and preferably 40° to 60°. If it exceeds 60° or 70°, it is poorly moldable, and if it is less than 20° or 40°, it has high adhesive strength.

1 and 2, the outer shape of the sheet material 50 is, for example, a substantially circular shape in plan view. Specifically, the sheet material 50 includes an outer edge portion 51 fixed to both ends in the extension direction of the tubular member 10, and a central portion 52 facing the internal spaces 17 and 25 of the tubular member 10. The outer edge portion 51 is a ring-shaped ring portion. The central portion 52 has a central portion 53 located at the center of the ring portion 51 and spaced apart from the ring portion 51, and a plurality of rib portions 54 that connect the ring portion 51 and the central portion 53. As a result, six through holes 56 having a trapezoidal shape in plan view are provided between the outer edge portion 51 and the central portion 53. The provision of the plurality of through holes 56 and the rib portion 54 makes the sheet material 50 more flexible.

The outer edge portion 51 may have a plurality of holes 55 along the outer circumference of the sheet material 50. The pin 16 provided at the outer end of the first cylindrical body 11 passes through the hole 55 and engages with the pin hole 24 provided at the inner end of the second cylindrical body 21, so that the sheet material 50 is fixed between the first cylindrical body 11 and the second cylindrical body 21. Specifically, the sheet material 50 is fixed to the second region 15 of the first cylindrical body 11. As a result, even when the magnet 40 reciprocates and the sheet material 50 bends in the left-right direction, the first inner diameter side wall surface 13 of the first cylindrical body 11 does not get in the way, and the sheet material 50 can be easily bent.

In addition, because the sheet material 50 is flexibly deformed, the magnet 40 can move back and forth efficiently. Therefore, even if the longitudinal length of the first cylindrical body 11 is made shorter than that of conventional vibration dynamo devices, sufficient power generation efficiency can be obtained.

The vibration dynamo device 1 of this embodiment is used in devices that can generate electricity through vibration, such as a chime device, a wireless mouse for operating a personal computer, a walking stick with a light, and a backpack light. Below, we will explain the circuit when the vibration dynamo device 1 is used as a chime device 100 as an example.

Figure 3 is an equivalent circuit diagram when the vibration dynamo device 1 of this embodiment is used in a chime device 100. Referring to Figure 3, the chime device 100 includes the vibration dynamo device 1 described above, a rectifier circuit 61, a charging circuit 62, a sound generating device 63, and a switch 64.

The rectifier circuit 61 is provided at one end of the coil 30 (Fig. 1) and rectifies the AC current generated in the coil 30. The charging circuit 62 charges the DC current converted by the rectifier circuit 61. For example, an electric double layer capacitor is used for the charging circuit 62. There are no particular limitations on the sound generating device 63 as long as it generates a sound when a current is applied, and for example, a buzzer, a bell, music, etc. can be used.

The switch 64 is operated by the user to switch the sound generating device 63 between conductive and non-conductive states. When the push button is pressed with the switch in the OFF state, the current generated by the vibration dynamo device 1 is stored in the charging circuit 62. Therefore, if the charging circuit 62 is charged, the sound generating device 63 can be made to sound by turning the switch 64 ON, even if the vibration dynamo device 1 is not operating.

Next, the operation of the vibration dynamo device 1 of this embodiment will be described with reference to Figures 1 and 4. The left-right direction in the following description corresponds to the left-right direction on the paper.

The tubular member 10 of the vibration dynamo device 1 is held and reciprocated in the extension direction of the tubular member 10, i.e., in the left-right direction along the arrow A2 in FIG. 1. As a result, the magnet 40 reciprocates in the first internal space 17 of the first tubular body 11 along the extension direction of the first tubular body 11.

Specifically, when the cylindrical member 10 is swung to the left as shown in FIG. 4(a), the magnet 40 moves to the right as shown in FIG. 4(b) and abuts against the sheet material 50 located on the right side. As a result, the sheet material 50 bends to the right as the magnet 40 abuts against it. When the cylindrical member 10 is further swung to the right, the magnet 40 passes through the coil 30 as shown in FIG. 4(c), and the magnet 40 moves to the left as shown in FIG. 4(d), and abuts against the sheet material 50 located on the left side. As a result, the sheet material 50 bends to the left as the magnet 40 abuts against it. When the cylindrical member 10 is further swung to the right, the magnet 40 passes through the coil 30 as shown in FIG. 4(e). In this way, the operations of FIG. 4(b) to FIG. 4(e) are repeated.

As a result, the magnet 40 makes a reciprocating motion passing through the coil 30 arranged on the outer periphery of the cylindrical member 10, so that the magnetic flux lines generated from the magnet 40 are perpendicular to the coil 30, generating an induced current as an induced electromotive force. As the magnet 40 repeatedly goes in and out of the coil 30, an alternating current is generated in the coil 30.

In the vibration dynamo device 1 of this embodiment, the flexible sheet material 50 repeatedly expands and contracts to assist the reciprocating motion of the magnet 40, allowing the magnet 40 to efficiently reciprocate within the coil 30, thereby improving power generation efficiency.

In the present embodiment, the vibration dynamo device 1 has been described as having the cylindrical member 10 extending in the left-right direction and reciprocating in the left-right direction, but the cylindrical member 10 may also extend in the up-down direction and reciprocate in the up-down direction.

In addition, in this embodiment, the second cylindrical body 21 is provided on the outer side of the sheet material 50, but the second cylindrical body 21 does not have to be provided, and it is sufficient that the sheet material 50 is held to the outer end of the first cylindrical body 11 by a connecting device such as a screw.

In the second embodiment, another configuration example of the vibration dynamo device 1 will be described. Only the differences from the first embodiment will be described in detail below.

<Embodiment 2>
In the vibration dynamo device 1 of the first embodiment, the cylindrical member 10 extends in the left-right direction, but it may extend in the up-down direction. Furthermore, the cover 26 is formed of a rubber plate, but the cover 26A of this embodiment may have a repulsion magnet 26a. The other configurations may be the same as those of the first embodiment. In this embodiment, the magnet 40 is referred to as the main magnet in contrast to the repulsion magnet 26a.

Referring to FIG. 5, the cylindrical member 10 of this embodiment extends in the vertical direction in FIG. 5. The cover portion 26A has a repulsive magnet 26a that magnetically repels the main magnet 40, and a covering portion 26b located outside the repulsive magnet 26a. A pair of repulsive magnets 26a are provided at the upper end and the other end of the first cylindrical body 11. The repulsive magnet 26a is not particularly limited as long as it includes a magnet, and may be, for example, only a magnet, or may further include a yoke arranged at the end of the magnet.

The magnetic properties of the repulsion magnet 26a are preferably different from those of the main magnet 40. Specifically, the coercive force of the repulsion magnet 26a is smaller than that of the main magnet 40. When the main magnet 40 is a Nd-Fe-B sintered magnet, the repulsion magnet 26a is, for example, a Nd-Fe-B resin magnet, a Sm-Co resin magnet, or a Nd-Fe-N resin magnet.

The magnetic properties of the Nd-Fe-B resin magnet used in the repulsion magnet 26a and the Nd-Fe-B sintered magnet used in the main magnet 40 are listed in Table 1 below. For reference, the magnetic properties of the anisotropic ferrite magnet are also listed.

As shown in Table 1, the coercive force of the main magnet 40 is 868 kA/m or more, and the coercive force of the repulsion magnet 26a is 400 to 432 kA/m, which is greater than the coercive force of the repulsion magnet 26a. If the coercive force of the repulsion magnet 26a is too large, the longitudinal dimension of the first cylindrical body 11 must be increased. On the other hand, if the coercive force of the repulsion magnet 26a is small, the repulsion magnet 26a will be magnetized by the magnetic force of the main magnet 40. When an anisotropic ferrite magnet (reference magnet in Table 1) is used as the repulsive member, the coercive force of the anisotropic ferrite magnet is 230 to 275 kA/m, which is significantly smaller than the coercive force of the main magnet 40, so the anisotropic ferrite magnet is magnetized by the magnetic force of the main magnet 40, and the main magnet 40 is attracted to the anisotropic ferrite magnet.

The repulsion magnet 26a arranged at the upper end of the cylindrical member 10 and the repulsion magnet 26a arranged at the lower end of the cylindrical member 10 are the same member. The polarity of the repulsion magnet 26a is arranged so that it magnetically repels the main magnet 40 in the first internal space 17. As a result, the main magnet 40 magnetically repels the repulsion magnet 26a, allowing efficient reciprocating motion and improving power generation efficiency.

In addition, since the vibration dynamo device 1A of this embodiment is arranged in the vertical direction, the main magnet 40 moves downward due to gravity. By providing the repulsion magnet 26a, the main magnet 40 is held in a floating state by the magnetic repulsion of the repulsion magnet 26a, so that the sheet material 50B can be prevented from becoming stretched.

The covering portion 26b covers the outer side of the repulsion magnet 26a. The covering portion 26b may be made of a non-magnetic material, for example, a rubber plate similar to that of the first embodiment described above.

In the present embodiment, the vibration dynamo device 1A has been described as having the cylindrical member 10 extending in the vertical direction and reciprocating in the left-right direction, but the cylindrical member 10 may also extend in the left-right direction and reciprocate in the left-right direction.

In addition, in the vibration dynamo device 1A of this embodiment, the repulsive magnet 26a is provided at the upper and lower ends, but it is sufficient to provide it at least at the lower end only.

In addition, in the above-mentioned first and second embodiments, the sheet material 50 has the shape shown in FIG. 2, but this is not limiting. For example, as shown in FIGS. 6 and 7, the shapes of the central portions 52B and 52C of the sheet materials 50B and 50C may be different.

Referring to FIG. 6, the through hole 56B provided between the outer edge portion 51 and the center portion 53B of the sheet material 50B has a generally triangular shape in a plan view. In this modification, the thickness of the rib portion 54B (the distance between the through holes 56B) can be made wider.

Referring to FIG. 7, the shape of the through hole 56C provided between the outer edge portion 51 and the center portion 53C of the sheet material 50C is generally circular in plan view. The shape and size of the through hole 56C and the hole portion 55 are generally the same. This makes it easy to manufacture the sheet material 50C of this modified example.

<Third embodiment>
In the above-mentioned embodiments 1 and 2, the cylindrical member 10 of the vibration dynamo device 1, 1A is held and the magnet 40 is caused to move back and forth to generate electricity, but the magnet 40 may also be caused to move back and forth automatically to generate electricity by operating the switch mechanism 8 arranged on the outside of the cylindrical member 10.

In the following embodiment, the vibration dynamo device 1 of embodiment 1 is used, but since it does not generate electricity through vibration, it is simply called a dynamo device. In this embodiment, the magnet 40 is called the first magnet in contrast to the second magnet 83 used in the switch mechanism 8.

Referring to Figures 8 and 9, the dynamo device 7 with switch mechanism of the third embodiment includes a dynamo device 1 and a switch mechanism 8 disposed outside the cylindrical member 10 of the dynamo device 1. The switch mechanism 8 may be directly fixed to the cylindrical member 10, or may be provided in the vicinity of the cylindrical member 10 on a different side from the cylindrical member 10.

The switch mechanism 8 is, for example, a push button type. The switch mechanism 8 includes a housing 80, a moving part 82 that is movable within the housing 80, and a second magnet 83 that is provided at the tip of the moving part 82. The switch mechanism 8 is disposed in a position where the second magnet 83 acts on the first magnet 40. In other words, the second magnet 83 is disposed in a position where it attracts or repels the first magnet 40.

The housing 80 is formed of a non-magnetic material similar to the tubular member 10. The housing 80 is open at one end in the width direction (the right side on the paper) and closed at the other end in the width direction (the left side on the paper). A spring 81 is disposed at the other end in the width direction. The spring 81 is biased toward the inside of the housing 80 (the right side).

The moving part 82 is rod-shaped and made of the same non-magnetic material as the housing 80. The moving part 82 moves left and right inside the housing 80. Specifically, when the moving part 82 is pushed to the left, the left end of the moving part 82 hits the spring 81, and is pushed back to the right by the elasticity of the spring 81. A second magnet 83 is attached to the left end of the moving part 82.

The shape of the second magnet 83 is not limited, but may be, for example, a cylinder or a sphere. The term "sphere" and "cylinder" refers to a shape that is spherical or cylindrical, and includes those that are hollow inside. The term "cylinder" also refers to a cylindrical body, a rectangular column, a disk, etc., and in this embodiment, the second magnet 83 is a cylinder. The second magnet 83 is a permanent magnet, like the first magnet 40. The material of the second magnet 83 is not particularly limited, but it is preferable to use a Nd-Fe-B sintered magnet, like the first magnet 40. The second magnet 83 is magnetized in the direction of reciprocating motion (axial direction). The first magnet 40 and the second magnet 83 are arranged so that the same poles face each other.

The second magnet 83 acts on the first magnet 40 of the dynamo device 1 and can be displaced between a first position (right side position: FIG. 9(a)) and a second position (left side position: FIG. 9(c)). Specifically, by pushing the moving part 82 to the left, the second magnet 83 moves from the right side position to the left side position, hits the spring 81, and is pushed back to its original position by the biasing force of the spring 81.

Next, the operation of the dynamo device 7 with switch mechanism of this embodiment will be described with reference to FIG.

As shown in FIG. 9(a), when the moving part 82 in the first position is pushed to the left, the south pole of the first magnet 40 and the south pole of the second magnet 83 repel each other, and the first magnet 40 moves further to the left. As shown in FIG. 9(b), the first magnet 40 comes into contact with the sheet material 50 located on the left side, and the sheet material 50 bends to the left. When the moving part 82 is further pushed to the left to reach the second position, the first magnet 40 passes through the coil 30 and moves to the right as shown in FIG. 9(c).

As a result, the first magnet 40 repels the second magnet 83 of the switch mechanism 8, making it possible to move the first magnet 40 at high speed simply by operating the switch mechanism 8, thereby improving power generation efficiency without having to shake the dynamo device 1 by hand, for example.

In the third embodiment, one dynamo device 1 is provided for one switch mechanism 8. However, as shown in FIG. 10, two dynamo devices 1 may be provided for one switch mechanism 8. In this case, the two dynamo devices 1 only need to be provided in a position where the second magnet 83 of the switch mechanism 8 magnetically acts on the first magnet 40. As a result, since two dynamo devices 1 are provided, it is possible to generate more power than the dynamo device 7 with switch mechanism of the third embodiment. The number of dynamo devices 1 is not limited to two, and multiple dynamo devices 1 may be provided.

In addition, the switch mechanism 8 in the third embodiment has been described as being of a push button type, but it may be of various types, such as a pull type or a lever type. Furthermore, the switch mechanism 8 only needs to be provided with at least a second magnet 83 that acts on the first magnet 40, and the configuration of the switch mechanism 8 is not limited to the above embodiment. In addition, the first magnet 40 has been described as moving due to the repulsion of the second magnet 83, but it may also be movable due to attraction.

Furthermore, in the dynamo device 7, 7A with a switch mechanism of the third embodiment, the dynamo device 1 used in the first embodiment is used, but the device used in the second embodiment may also be used. Even if the dynamo device 1 used in the first embodiment is used, the cover portion 26 may be replaced with a repulsive magnet 26a.

The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these.

In this example, we investigated the effect of using a flexible sheet material.

(Example of the invention)
The vibration dynamo device of the present invention was the same as that of the first embodiment shown in Figures 1 to 3. Specifically, the cylindrical member 10 had an outer diameter of 20 mm, an inner diameter of 11 mm, and a length of 32 mm. The coil 30 was a solenoid coil, and the outer diameter of the winding constituting the coil 30 was 0.1 mm, the number of turns (number of turns) was 2660 T, and the length was 10 mm. The magnet 40 was a cylinder, and had a diameter of 10 mm and a thickness (length along the extension direction) of 14 mm. The sheet material 50 was silicone rubber, and had a durometer A hardness of 50° and a thickness of 0.4 mm.

Comparative Example
The vibration dynamo device of the comparative example was similar to the vibration dynamo device of the present invention, but differed in the configuration of the sheet material. Specifically, the vibration dynamo device of the comparative example was made by stacking four sheets of the sheet material used in the vibration dynamo device of the present invention, making the overall thickness of the sheet material 1.6 mm, and not providing the second internal space 25. By stacking four sheets of the sheet material and not providing the second internal space 25, it was possible to prevent the sheet material from bending and deforming.

(Evaluation Method)
The output voltage was evaluated for the vibration dynamo devices of the present invention and the comparative example. The vibration dynamo devices of the present invention and the comparative example were run back and forth three times per second, and the output voltage was measured with a digital tester connected to the coil. Note that before measuring the output voltage, it was rectified with a diode bridge. The results are shown in Table 2 below.

(Evaluation Results)
As shown in Table 2, the example of the present invention in which the sheet material was 0.4 mm thick and capable of flexural deformation had an output voltage of 1.5 to 1.6 V. In contrast, the comparative example in which the sheet material was 1.6 mm thick and not capable of flexural deformation had an output voltage of 1.0 to 1.1 V. Thus, by using a sheet material capable of flexural deformation, it was possible to significantly improve the output voltage.

Although the embodiment of the present invention has been described above with reference to the drawings, the present invention is not limited to the illustrated embodiment. Various modifications and variations can be made to the illustrated embodiment within the same scope as the present invention or within an equivalent scope.

1, 1A vibration dynamo device (dynamo device), 7, 7A dynamo device with switch mechanism, 8 switch mechanism, 10 cylindrical member, 11 first cylindrical body, 12 first outer diameter side wall surface, 13 first inner diameter side wall surface, 14 first region, 15 second region, 16 pin, 17 first internal space, 18 air hole, 21 second cylindrical body, 22 second outer diameter side wall surface, 23 second inner diameter side wall surface, 24 pin hole portion, 25 second internal space, 26, 26A lid portion, 26a repulsion magnet, 26b covering portion, 30 coil, 40 magnet (main magnet, first magnet), 50, 50B, 50C sheet material, 51 outer edge portion (ring portion), 52, 52B, 52C central portion, 53, 53B, 53C central portion, 54, 54B, 54C Rib portion, 55 hole portion, 56, 56B, 56C through holes, 61 rectifier circuit, 62 charging circuit, 63 sound generating device, 64 switch, 80 housing, 81 spring, 82 moving portion, 83 second magnet, 100 chime device.

Claims (8)

A cylindrical member including a first cylindrical body made of a non-magnetic material and open at both ends, the lengths of both ends of which are defined, and two second cylindrical bodies respectively disposed on one end side and the other end side of the first cylindrical body;
A coil disposed on an outer periphery of the first cylindrical body;
A magnet is disposed in an internal space of the first cylindrical body and is capable of reciprocating along an extension direction of the cylindrical member;
A first sheet material fixed to one end of the first cylindrical body in an extending direction;
a second sheet material fixed to the other end of the first cylindrical body in the extending direction,
the internal space formed by the cylindrical member includes a first internal space in which the magnet is located and which is formed by the first cylindrical body, a second internal space which is located on one end side of the first internal space, which is formed by one side of the second cylindrical body, and which is located outside the first sheet material, and a third internal space which is located on the other end side of the first internal space, which is formed by the other side of the second cylindrical body, and which is located outside the second sheet material,
the first sheet material includes a first outer edge portion fixed to one end of the first cylindrical body in an extension direction, and a first central portion facing the first internal space and the second internal space,
the second sheet material includes a second outer edge portion fixed to the other end of the first cylindrical body in the extension direction and a second central portion facing the first internal space and the third internal space,
A vibration dynamo device, wherein the first central portion and the second central portion are elastically flexibly deformable along the extension direction of the tubular member. an inner diameter side wall surface of the cylindrical member that forms the first internal space includes a first region having a first inner diameter dimension and a second region having a second inner diameter dimension larger than the first inner diameter dimension and positioned so as to sandwich the first region;
2. The vibration dynamo apparatus of claim 1, wherein the first sheet material and the second sheet material are each fixed to the second region. The vibration dynamo device according to claim 1 or 2, wherein the second cylindrical body is provided with a lid that closes its outer end. the first sheet material includes a first ring portion constituting the first outer edge portion, and a first center portion and a first rib portion constituting the first central portion;
the first central portion is centrally located in the first ring portion and spaced apart from the first ring portion;
The first rib portion is provided in plurality and connects the first ring portion and the first center portion,
the second sheet material includes a second ring portion constituting the second outer edge portion, and a second center portion and a second rib portion constituting the second central portion;
the second central portion is centrally located in the second ring portion and spaced apart from the second ring portion;
The vibration dynamo device according to any one of claims 1 to 3, wherein the second rib portion is provided in plurality and connects the second ring portion and the second central portion. A vibration dynamo device according to any one of claims 1 to 4, wherein the magnet is a cylindrical body. The vibration dynamo device according to claim 3, wherein the lid portion has a repulsive magnet that magnetically repels the magnet. A cylindrical member including a first cylindrical body made of a non-magnetic material and open at both ends, the lengths of both ends of which are defined, and two second cylindrical bodies respectively disposed on one end side and the other end side of the first cylindrical body;
A coil disposed on an outer periphery of the first cylindrical body;
A first magnet is disposed in an internal space of the first cylindrical body and is capable of reciprocating along an extension direction of the cylindrical member;
A first sheet material fixed to one end of the first cylindrical body in an extending direction;
a second sheet material fixed to the other end of the first cylindrical body in the extending direction,
the internal space formed by the cylindrical member includes a first internal space in which the first magnet is located and which is formed by the first cylindrical body, a second internal space which is located on one end side of the first internal space, which is formed by one side of the second cylindrical body, and which is located outside the first sheet material, and a third internal space which is located on the other end side of the first internal space, which is formed by the other side of the second cylindrical body, and which is located outside the second sheet material,
the first sheet material includes a first outer edge portion fixed to one end of the first cylindrical body in an extension direction, and a first central portion facing the first internal space and the second internal space,
the second sheet material includes a second outer edge portion fixed to the other end of the first cylindrical body in the extension direction and a second central portion facing the first internal space and the third internal space,
a dynamo device in which the first central portion and the second central portion are elastically deformable along an extension direction of the cylindrical member;
a switch mechanism including a second magnet that acts on the first magnet and is displaceable between a first position and a second position, the switch mechanism being disposed outside the cylindrical member;
A dynamo device with a switch mechanism, in which the first magnet moves in the extension direction of the cylindrical member as the second magnet is displaced from the first position to the second position. The dynamo device with switch mechanism according to claim 7, wherein the dynamo device is provided in a plurality of positions where the second magnet of the switch mechanism acts on the first magnet.

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