WO2023223982A1

WO2023223982A1 - Charging device

Info

Publication number: WO2023223982A1
Application number: PCT/JP2023/018017
Authority: WO
Inventors: 慧太京田; 光渡邊; 直希倉知
Original assignee: フォスター電機株式会社
Priority date: 2022-05-19
Filing date: 2023-05-12
Publication date: 2023-11-23
Also published as: JP2023170567A

Abstract

This charging device comprises: a battery that stores electricity, and supplies electricity to an earphone; and a thermoelectric power generation element connected to the battery. The thermoelectric power generation element comprises a thermoelectric power generation element that has a high temperature part and a low temperature part, and generates thermo-electromotive force when there is a difference between the temperature of the high temperature part and the temperature of the low temperature part. Thus, it is possible to charge the battery installed without being connected to a power source.

Description

charging device

The present disclosure relates to a charging device.

Japanese Patent No. 5099436 discloses a hearing aid that compensates for battery (rechargeable battery) consumption through thermoelectric power generation using the wearer's body temperature. The hearing aid described in this document includes a main body and an earplug that is formed integrally with the main body and is inserted into the ear canal of the wearer. A thermoelectric conversion section is provided in a range from the main body section to the earplug section. This thermoelectric conversion section includes a high-temperature side sheet member provided on the outer periphery of the earplug section, a low-temperature side sheet member provided on the outer periphery of the main body section, and provided between the high-temperature side sheet member and the low-temperature side sheet member. and a thermoelectric element array. Then, when the earplug part is inserted into the ear canal of the wearer, a temperature difference is created between the high-temperature side sheet member and the low-temperature side sheet member, making it possible to generate an electromotive force for charging the battery. ing. In other words, it is possible to charge the battery installed in the hearing aid without connecting it to a power source.

In consideration of the above facts, the present disclosure aims to provide a charging device that can charge a mounted battery without being connected to a power source.

The charging device of the first aspect has a battery that stores power and supplies power to a charging target, and is connected to the battery and has a high temperature section and a low temperature section, and has a temperature of the high temperature section and a temperature of the low temperature section. and a thermoelectric power generation element that generates a thermoelectromotive force due to a difference in temperature.

According to the charging device of the first aspect, the electric power stored in the battery is supplied to the object to be charged. Here, if a difference occurs between the temperature of the high temperature part and the temperature of the low temperature part of the thermoelectric power generating element, a thermoelectromotive force is generated. Thereby, the battery can be charged. In this way, the mounted battery can be charged without being connected to a power source.

The charging device of the second aspect is the charging device of the first aspect, in which a heat shielding film that reflects infrared rays is formed on a surface of the low temperature section opposite to the high temperature section.

According to the charging device of the second aspect, a heat shielding film that reflects infrared rays is formed on the surface of the low-temperature section opposite to the high-temperature section. As a result, the temperature increase in the low-temperature portion due to exposure to infrared rays can be suppressed, and the thermoelectromotive force of the thermoelectric generation element can be suppressed from decreasing.

A charging device according to a third aspect, in the charging device according to the first aspect or the second aspect, includes a box portion in which the charging target is stored, and a box portion that opens and closes by being displaced with respect to the box portion. It has a lid part.

According to the charging device of the third aspect, the box part can be opened and closed by displacing the lid part with respect to the box part. Thereby, the charging target can be stored in the box part or the charging target can be taken out from the box part.

A charging device according to a fourth aspect is the charging device according to the third aspect, in which the thermoelectric power generation element is provided in the lid portion.

According to the charging device of the fourth aspect, when the lid portion is displaced with respect to the box portion, the thermoelectric generation element is displaced together with the lid portion, and the air around the thermoelectric generation element is replaced. Thereby, the difference between the temperature of the high temperature part and the temperature of the low temperature part of the thermoelectric generation element is suppressed from becoming small, and it is possible to suppress the thermoelectromotive force of the thermoelectric generation element from decreasing.

In the charging device of the fifth aspect, in the charging device of the third aspect or the fourth aspect, the thermoelectric power generating element is moved to the box portion and the lid portion in conjunction with the displacement of the lid portion relative to the box portion. Displaced against.

According to the charging device of the fifth aspect, the thermoelectric power generation element is displaced relative to the box portion and the lid portion in conjunction with the displacement of the lid portion relative to the box portion. This changes the positional relationship between the thermoelectric generating element and the air around the thermoelectric generating element. As a result, the difference between the temperature of the high temperature part and the temperature of the low temperature part of the thermoelectric generation element is suppressed from becoming small, and it is possible to suppress the thermoelectromotive force of the thermoelectric generation element from decreasing.

A charging device according to a sixth aspect is the charging device according to any one of the third to fifth aspects, wherein the battery is provided in the box portion.

According to the charging device of the sixth aspect, the battery is provided in the box portion. This can suppress an increase in mass on the lid portion side compared to a configuration in which the battery is provided in the lid portion. Thereby, it is possible to suppress the charging device from falling over when the box portion is not closed by the lid portion.

The charging device according to a seventh aspect is the charging device according to any one of the first to sixth aspects, wherein a transparent cover is provided on a side of the high temperature section opposite to the low temperature section. There is.

According to the charging device of the seventh aspect, a transparent cover is provided on the side of the high temperature section opposite to the low temperature section. Thereby, the light that has passed through the transparent cover can be applied to the high temperature section. Further, it is possible to prevent or suppress the user of the charging device from touching the high temperature part.

In the charging device of the eighth aspect, in the charging device of the fourth aspect or the fifth aspect, at least a part of the lid portion serves as a heat radiating part that radiates heat transferred from the low temperature part.

According to the charging device of the eighth aspect, heat in the low temperature part can be radiated from the heat radiating part of the lid part. Thereby, the temperature rise in the low temperature section is suppressed, and the thermoelectromotive force of the thermoelectric power generating element can be suppressed from decreasing.

The charging device according to a ninth aspect is the charging device according to any one of the first to eighth aspects, in which a side of the low temperature section opposite to the high temperature section absorbs heat from the low temperature section. A heat absorbing member is provided.

According to the charging device of the ninth aspect, heat in the low temperature part is absorbed by the heat absorbing member. Thereby, the temperature rise in the low temperature section is suppressed, and the thermoelectromotive force of the thermoelectric power generating element can be suppressed from decreasing.

A charging device according to a tenth aspect is the charging device according to the ninth aspect, in which an air layer is provided between the low temperature section and the heat absorbing member.

According to the charging device of the tenth aspect, an air layer is provided between the low temperature section and the heat absorbing member. By having this air layer, it is possible to suppress heat from the battery side from being transmitted to the low temperature part side via the heat absorbing member. Thereby, the temperature rise in the low temperature section is suppressed, and the thermoelectromotive force of the thermoelectric power generating element can be suppressed from decreasing.

In the charging device according to an eleventh aspect, in the charging device according to any one of the third to sixth aspects, the charging target is an earphone, and the box portion includes an earphone that holds the earphone. A holding part is provided.

According to the charging device of the eleventh aspect, the power stored in the battery is supplied to the earphone held in the earphone holding part of the box portion. Further, the earphones can be stored in the charging device by closing the box portion with the lid portion while holding the earphones in the earphone holding portion provided in the box portion.

The charging device according to the present disclosure has an excellent effect of being able to charge a mounted battery without being connected to a power source.

It is a perspective view showing a charging device and an earphone of a 1st embodiment. FIG. 2 is a schematic diagram schematically showing a thermoelectric power generation element. It is a side view which shows typically the charging device of 2nd Embodiment, and has shown the state where the box part is opened. It is a perspective view showing a rotating member, and shows a state where a switch part is not pressed. 5 is a perspective view of the rotating member, showing a state in which the switch portion is pressed and the rotating member body is rotated from the position shown in FIG. 4. FIG. FIG. 6 is a perspective view showing the rotating member whose main body has rotated to the position shown in FIG. 5, and shows a state in which the switch portion is not pressed. FIG. 7 is a perspective view of the rotating member, showing a state in which the switch portion is pressed and the rotating member main body is rotated from the position shown in FIG. 6; It is a side view which shows typically the charging device of 2nd Embodiment, and has shown the state where the box part is closed by the lid part. It is a side view which shows typically the charging device of 3rd Embodiment, and has shown the state where the box part is opened. It is a perspective view showing a rotating member, and shows a state where a switch part is not pressed. 11 is a perspective view of the rotating member, showing a state in which the switch portion is pressed and the rotating member main body is rotated from the position shown in FIG. 10. FIG. It is a side view which shows typically the charging device of 3rd Embodiment, and has shown the state where the box part is closed by the lid part.

(First embodiment)
A charging device 10 according to an embodiment of the present disclosure will be described using FIGS. 1 and 2. Note that arrow FR, arrow UP, arrow RH, and arrow LH shown in the figure indicate the front side, the upper side, the right side, and the left side of the charging device 10, respectively. Hereinafter, when a description is simply made using front and back, top and bottom, and left and right directions, unless otherwise specified, the front and back, top and bottom, and left and right directions of the charging device 10 are meant.

As shown in FIG. 1, the charging device 10 of this embodiment is used to charge an earphone 12 as a charging target. The earphone 12 is, for example, a type that is connected to an audio device through wireless communication, and includes a vibrating section that generates sound and an earphone-side battery that supplies power to the vibrating section. There is.

The charging device 10 includes a box portion 14 in which the earphones 12 are stored, and a lid portion 16 that opens and closes the box portion 14 by being displaced relative to the box portion 14. The charging device 10 also includes a battery 18 that stores power and supplies power to the earphones 12, a thermoelectric power generation element 20 connected to the battery 18, a heat absorption member 22 disposed adjacent to the thermoelectric power generation element 20, It is equipped with

The box portion 14 is formed into a rectangular box shape with an open upper side. This box portion 14 includes a bottom wall portion 14A having a thickness direction in the vertical direction and having a rectangular shape when viewed from above. The box portion 14 also includes a peripheral wall portion 14B that extends upward from the left end, right end, front end, and rear end of the bottom wall portion 14A. By having the bottom wall portion 14A and the peripheral wall portion 14B, the space inside the box portion 14 is a rectangular parallelepiped-shaped space.

The bottom wall portion 14A side (lower side) of the internal space of the box portion 14 is a battery storage portion 24 in which the battery 18 is stored. Further, an earphone holding member 26 for holding the earphone 12 is provided on the opposite side (upper side) of the bottom wall portion 14A in the interior space of the box portion 14. This earphone holding member 26 is fixed to the peripheral wall portion 14B of the box portion 14. The earphone holding member 26 is formed into a rectangular shape when viewed from above. Two earphone holding portions 26A are formed in the central portion of the earphone holding member 26 in the front-rear direction and are recessed downward. The two earphone holding parts 26A are spaced apart from each other in the left-right direction. An electrode (not shown) is provided inside the earphone holding portion 26A. When the earphone 12 is held by the earphone holding part 26A, the electrode provided inside the earphone holding part 26A and the electrode provided on the earphone 12 side come into contact, and power is supplied from the battery 18 to the earphone 12. It is now possible to do so. That is, the earphone side battery of the earphone 12 is charged. Note that, in FIG. 1, illustration of the peripheral wall portion 14B extending upward from the rear end of the bottom wall portion 14A is omitted. Moreover, in FIG. 1, the lid part 16 and a part of each member provided on the lid part 16 side are shown in a state of being cut along the left-right direction.

The lid portion 16 includes a lid portion main body 28 as a heat dissipation portion formed in a rectangular frame shape, and a transparent cover 30 attached to the lid portion main body 28. The box portion 14 side and the opposite side of the box portion 14 in the lid portion main body 28 are open. Moreover, the space inside the lid portion main body 28 is a rectangular parallelepiped-shaped space. A transparent cover 30 is provided on the opposite side of the box portion 14 in the interior space of the lid portion main body 28. By fixing this transparent cover 30 to the lid part main body 28, the side of the lid part main body 28 opposite to the box part 14 is closed. Note that the transparent cover 30 of this embodiment is formed using colorless and transparent glass, resin material, or the like. Furthermore, a thermoelectric power generating element 20 and a heat absorbing member 22, which will be described later, are provided on the side of the box portion 14 in the space inside the lid portion main body 28.

Further, the front end of the lid portion main body 28 and the front end of the peripheral wall portion 14B of the box portion 14 are connected via a hinge member (not shown). This allows the lid portion 16 to be displaced (tilted) relative to the box portion 14. As a result, the box part 14 can be opened and closed by the lid part 16.

The battery 18 is formed in the shape of a rectangular parallelepiped with a vertical dimension smaller than its horizontal and longitudinal dimensions. This battery 18 is fixed to the bottom wall portion 14A while being stored in the battery storage portion 24 of the box portion 14.

As shown in FIG. 2, the thermoelectric generating element 20 is a Peltier element in which electrodes 32 and 34 are connected by a P-type semiconductor 36 and an N-type semiconductor 38. One electrode 32 is a high temperature section 32A formed in a rectangular plate shape, and the other electrode 34 is a low temperature section 34A formed in a rectangular plate shape. A thermoelectromotive force V is generated due to a difference between the temperature of the high temperature section 32A and the temperature of the low temperature section 34A. This thermoelectric power generating element 20 is connected to a battery 18.

Furthermore, a heat shielding film 40 that reflects infrared rays is formed on the surface of the low temperature section 34A opposite to the high temperature section 32A. The heat shielding film 40 is formed by applying a paint called a heat shielding paint or a light shielding paint to the low temperature portion 34A.

As shown in FIGS. 1 and 2, the thermoelectric power generation element 20 described above is fixed to the lid main body 28 while being disposed inside the lid main body 28. When the thermoelectric generating element 20 is fixed to the lid portion main body 28, the high temperature portion 32A of the thermoelectric generating element 20 is arranged close to the transparent cover 30. Note that an air layer may or may not be provided between the high temperature section 32A and the cover 30.

The heat absorbing member 22 is an ice pack containing water or a highly water-absorbing resin inside, and is formed into a rectangular parallelepiped shape. The heat absorbing member 22 is fixed to the lid main body 28 while being disposed inside the lid main body 28 and on the box part 14 side with respect to the thermoelectric generation element 20. In addition, when the heat absorbing member 22 is fixed to the lid main body 28, the low temperature part 34A is disposed facing the heat absorbing member 22, and the low temperature part 34A and the heat absorbing member 22 are spaced apart from each other by a predetermined distance. It is located. Thereby, an air layer 42 is provided between the low temperature section 34A and the heat absorbing member 22. Note that an air layer may or may not be provided between the low temperature section 34A and the heat absorbing member 22. Further, in this embodiment, the heat absorbing member 22 and the lid portion main body 28 are connected. Note that an air layer may or may not be provided between the heat absorbing member 22 and the earphone holding member 26.

(Actions and effects of this embodiment)
Next, the operation and effects of this embodiment will be explained.

As shown in FIGS. 1 and 2, in the charging device 10 of the present embodiment, for example, when the lid portion 16 is exposed to sunlight, the sunlight that has passed through the transparent cover 30 is transmitted to the high temperature portion 32A of the thermoelectric generation element 20. corresponds to As a result, the temperature of the high temperature section 32A increases, and a difference occurs between the temperature of the high temperature section 32A and the temperature of the low temperature section 34A. As a result, thermoelectromotive force V is generated and electric power is stored in battery 18. In this way, the charging device 10 of this embodiment can charge the mounted battery 18 without being connected to a power source. Note that by adjusting the attitude of the lid portion 16 with respect to the box portion 14, the high temperature portion 32A of the thermoelectric power generation element 20 may be directed toward the sun. Further, sunlight may be guided to the high temperature portion 32A side of the thermoelectric power generation element 20 using a mirror (not shown) or the like.

Here, while the earphone 12 is held in the earphone holding portion 26A, power is supplied from the battery 18 to the earphone 12, and the earphone-side battery of the earphone 12 is charged. In this way, the charging device 10 of this embodiment can charge the earphones 12.

Furthermore, in the thermoelectric power generation element 20 of the charging device 10 of this embodiment, a heat shielding film 40 that reflects infrared rays is formed on the surface of the low temperature section 34A opposite to the high temperature section 32A. Thereby, the temperature rise in the low temperature section 34A due to receiving infrared rays is suppressed, and the thermoelectromotive force of the thermoelectric power generating element 20 can be suppressed from decreasing. Note that whether or not to form the heat shielding film 40 on the low temperature section 34A may be determined as appropriate in consideration of the charging performance required of the charging device 10 and the like.

Furthermore, in the charging device 10 of this embodiment, the box portion 14 can be opened and closed by displacing the lid portion 16 with respect to the box portion 14. Thereby, the earphones 12 can be stored in the box portion 14 or the earphones 12 can be taken out from the box portion 14.

Furthermore, in the charging device 10 of this embodiment, when the lid portion 16 is displaced with respect to the box portion 14, the thermoelectric generation element 20 is displaced together with the lid portion 16, and the air around the thermoelectric generation element 20 is replaced. Thereby, the difference between the temperature of the high temperature part 32A and the temperature of the low temperature part 34A of the thermoelectric generation element 20 is suppressed from becoming small, and it is possible to suppress the thermoelectromotive force of the thermoelectric generation element 20 from decreasing.

Furthermore, according to the charging device 10 of this embodiment, the battery 18 is provided in the box portion 14. Thereby, compared to a configuration in which the battery 18 is provided in the lid portion 16, it is possible to suppress an increase in mass on the lid portion 16 side. Thereby, it is possible to suppress the charging device 10 from falling when the box portion 14 is not closed by the lid portion 16 (the box portion 14 is open). Note that the position where the battery 18 is provided may be appropriately set in consideration of the configuration of the charging device 10, the weight balance of each part, etc.

Furthermore, in the charging device 10 of this embodiment, the high temperature portion 32A of the thermoelectric power generation element 20 is arranged in close proximity to the transparent cover 30. In other words, the transparent cover 30 covering the high temperature section 32A is provided on the opposite side of the high temperature section 32A from the low temperature section 34A of the thermoelectric generation element 20. Thereby, it is possible to prevent or suppress the user of the charging device 10 from touching the high temperature section 32A. Note that if there is no problem even if the user of the charging device 10 touches the high temperature section 32A, the transparent cover 30 may not be provided. That is, the high temperature portion 32A may be exposed to the outside of the lid portion 16.

Furthermore, in the charging device 10 of the present embodiment, the lid portion main body 28 of the lid portion 16 serves as a heat radiating portion that radiates heat transferred from the low temperature portion 34A of the thermoelectric power generation element 20. Thereby, the heat of the low temperature section 34A can be radiated from the lid portion main body 28. As a result, the temperature rise in the low temperature section 34A is suppressed, and the thermoelectromotive force of the thermoelectric generation element 20 can be suppressed from decreasing. In order to increase the heat dissipation ability of the lid part main body 28, the side of the lid part main body 28 opposite to the thermoelectric generation element 20 may be formed into an uneven shape, or the lid part main body 28 may be provided with ribs. Further, the entire lid portion 16 may function as a heat radiating portion.

Furthermore, in the charging device 10 of the present embodiment, a heat absorption member 22 that absorbs heat from the low temperature section 34A is provided on the side opposite to the high temperature section 32A in the low temperature section 34A of the thermoelectric generation element 20. Thereby, the heat of the low temperature section 34A is absorbed by the heat absorbing member 22. As a result, the temperature rise in the low temperature section 34A is suppressed, and the thermoelectromotive force of the thermoelectric generation element 20 can be suppressed from decreasing. In addition, in the charging device 10 of the present embodiment, an air layer 42 is provided between the low temperature portion 34A of the thermoelectric generation element 20 and the heat absorbing member 22. By having this air layer 42, it is possible to suppress heat from the battery 18 side from being transmitted to the low temperature section 34A side via the heat absorbing member 22. Thereby, the temperature rise in the low temperature section 34A can be suppressed, and the thermoelectromotive force of the thermoelectric generation element 20 can be suppressed from decreasing. Furthermore, this air layer 42 can suppress heat from the thermoelectric power generation element 20 from being transmitted to the battery 18.

(Second embodiment)
Next, a charging device 44 according to a second embodiment of the present disclosure will be described using FIGS. 3 to 8. In addition, in the charging device 44 of the second embodiment, members and parts corresponding to those of the charging device 10 of the first embodiment described above are given the same reference numerals as those of the charging device 10 of the first embodiment, and the description thereof will be omitted. May be omitted.

As shown in FIG. 3, the charging device 44 of the present embodiment rotates to rotate the thermoelectric power generation element 20 with respect to the box part 14 and the lid part 16 in conjunction with the displacement of the lid part 16 with respect to the box part 14. It is characterized in that it includes a member 46.

In the charging device 44 of this embodiment, the thermoelectric power generation element 20 is rotatably supported by the lid portion 16. Further, a rotating member 46 is attached to the thermoelectric generating element 20. The rotating member 46 may be provided at the center of the thermoelectric generation element 20 when viewed from the front, or may be provided eccentrically.

As shown in FIGS. 4 and 5, the rotating member 46 includes a rotating member main body 48 formed in a cylindrical shape, and a rotating member main body 48 formed in a cylindrical shape having a smaller diameter than the rotating member main body 48, and supported by the rotating member main body 48. The switch section 50 is configured to include a The switch portion 50 is provided so as to protrude from the axis of the rotating member main body 48 toward one side in the axial direction of the rotating member main body 48 . When the switch section 50 is pushed toward the rotating member main body 48, the rotating member main body 48 rotates by a predetermined angle with respect to the switch section 50. Note that a known rotation mechanism is provided inside the rotating member body 48 to rotate the rotating member body 48 by a predetermined angle with respect to the switch portion 50 by pushing the switch portion 50 toward the rotating member body 48 side. .

As an example, in this embodiment, when the switch section 50 is pushed toward the rotating member main body 48 from the state shown in FIG. Rotate. Note that, in order to make it easier to understand the movement of the rotating member main body 48 with respect to the switch section 50, a chain double-dashed line is attached to a part of the rotating member main body 48.

As shown in FIG. 6, when the switch section 50 is pushed once again toward the rotating member main body 48, the rotating member main body 48 rotates by 90 degrees with respect to the switch section 50, as shown in FIG. In this manner, in the rotating member 46 of this embodiment, the rotating member main body 48 can be rotated by 90 degrees with respect to the switch section 50 each time the switch section 50 is pushed toward the rotating member main body 48 side.

As shown in FIG. 3, the surface of the rotating member main body 48 opposite to the switch section 50 is joined to the thermoelectric power generation element 20. When the lid portion 16 opens the box portion 14, the switch portion 50 projects from the lid portion 16 toward the box portion 14. Note that the rotating member main body 48 is inserted through the heat absorbing member 22.

As shown in FIG. 8, when the lid portion 16 is displaced to a position where the lid portion 16 closes the box portion 14, the switch portion 50 comes into contact with the box portion 14 and the switch portion 50 moves toward the rotating member main body 48. Pushed in. As a result, the thermoelectric generating element 20 is rotationally displaced with respect to the box portion 14 and the lid portion 16, and the positional relationship between the thermoelectric generating element 20 and the air around the thermoelectric generating element 20 changes. As a result, the difference between the temperature of the high temperature part 32A and the temperature of the low temperature part 34A of the thermoelectric generation element 20 is suppressed from becoming small, and the thermoelectromotive force of the thermoelectric generation element 20 can be suppressed from decreasing.

(Third embodiment)
Next, a charging device 52 according to a third embodiment of the present disclosure will be described using FIGS. 9 to 12. In the charging device 52 of the third embodiment, members and parts corresponding to the charging device 10 of the first embodiment and the charging device 44 of the second embodiment described above are the same as those of the charging device 10 of the first embodiment and the charging device 44 of the second embodiment. The same reference numerals as those of the charging device 44 of the second embodiment may be given, and the description thereof may be omitted.

As shown in FIG. 9, in the charging device 52 of this embodiment, the thermoelectric power generation element 20 is rotationally displaced relative to the box portion 14 and the lid portion 16 in conjunction with the displacement of the lid portion 16 relative to the box portion 14, and , is characterized in that the heat absorbing member 22 is rotationally displaced relative to the box portion 14 and the lid portion 16 to the side opposite to the thermoelectric power generation element 20. The heat absorbing member 22 is rotatably supported by the lid portion 16 similarly to the thermoelectric generating element 20 .

As shown in FIG. 10, in the rotating member 46 of this embodiment, the rotating member main body 48 has a two-part structure in the axial direction of the rotating member main body 48. Here, one of the divided rotating member bodies 48 will be referred to as a first rotating member body 48A, and the other of the divided rotating member bodies 48 will be referred to as a second rotating member body 48B. Then, as shown in FIG. 11, when the switch part 50 is pushed toward the rotating member main body 48 side, the first rotating member main body 48A is rotationally displaced to one side with respect to the switch part 50, and the second rotating member main body 48B is rotationally displaced toward the other side (the side opposite to the first rotating member main body 48A) with respect to the switch portion 50. In this embodiment, the first rotating member main body 48A is joined to the thermoelectric power generation element 20. Further, the second rotating member main body 48B is joined to the heat absorbing member 22.

Then, as shown in FIG. 12, when the lid part 16 is displaced to a position where the lid part 16 closes the box part 14, the switch part 50 comes into contact with the box part 14 and the switch part 50 closes the rotating member main body 48. pushed to the side. As a result, the thermoelectric power generation element 20 is rotationally displaced to one side with respect to the box part 14 and the lid part 16, and the heat absorbing member 22 is rotationally displaced to the other side with respect to the box part 14 and the lid part 16. The positional relationship between the element 20 and the air around the thermoelectric generation element 20 changes. Furthermore, the positional relationship between the thermoelectric power generating element 20 and the heat absorbing member 22 changes. As a result, the difference between the temperature of the high temperature part 32A and the temperature of the low temperature part 34A of the thermoelectric generation element 20 is suppressed from becoming small, and the thermoelectromotive force of the thermoelectric generation element 20 can be suppressed from decreasing.

In addition, in the second embodiment and second embodiment described above, an example was described in which the thermoelectric generation element 20 and the heat absorption member 22 were rotationally displaced with respect to the box part 14 and the lid part 16, but the present disclosure does not cover this. Not limited. For example, the thermoelectric power generation element 20 and the heat absorbing member 22 may be reciprocated (slided) relative to the box portion 14 and the lid portion 16.

Furthermore, in each of the embodiments described above, an example in which the heat absorbing member 22 is provided has been described, but the present disclosure is not limited thereto. Whether or not to provide the heat absorbing member 22 may be determined as appropriate in consideration of the charging performance required of the charging devices 10, 44, 52, and the like.

Further, in each of the embodiments described above, an example has been described in which the box part 14 and the lid part 16 are opened and closed, but the present disclosure is not limited thereto. The configuration of the housings of the charging devices 10, 44, and 52 may be appropriately set in consideration of the configuration of the charging target and the like.

Furthermore, the configurations of the charging devices 10, 44, and 52 described above can also be applied to charging devices for charging objects other than the earphones 12.

Although one embodiment of the present disclosure has been described above, the present disclosure is not limited to the above, and can be implemented with various modifications other than the above without departing from the spirit thereof. Of course.

The disclosure of Japanese Patent Application No. 2022-082413 filed on May 19, 2022 is incorporated herein by reference in its entirety.

Claims

A battery that stores power and supplies power to a charging target;
a thermoelectric power generation element that is connected to the battery and has a high temperature part and a low temperature part, and generates a thermoelectromotive force due to a difference between the temperature of the high temperature part and the temperature of the low temperature part;
A charging device with.
The charging device according to claim 1, wherein a heat shielding film that reflects infrared rays is formed on a surface of the low temperature section opposite to the high temperature section.
a box portion in which the charging target is stored;
a lid part that opens and closes the box part by being displaced with respect to the box part;
The charging device according to claim 1, comprising:
The charging device according to claim 3, wherein the thermoelectric generation element is provided in the lid portion.
The charging device according to claim 3, wherein the thermoelectric power generation element is displaced relative to the box portion and the lid portion in conjunction with the displacement of the lid portion relative to the box portion.
The charging device according to claim 4, wherein the battery is provided in the box portion.
The charging device according to claim 1, wherein a transparent cover is provided on a side of the high temperature section opposite to the low temperature section.
The charging device according to claim 4, wherein at least a portion of the lid portion serves as a heat radiating portion that radiates heat transferred from the low temperature portion.
The charging device according to claim 6, wherein a heat absorbing member that absorbs heat from the low temperature section is provided on the opposite side of the high temperature section in the low temperature section.
The charging device according to claim 9, wherein an air layer is provided between the low temperature section and the heat absorbing member.
The charging target is an earphone,
4. The charging device according to claim 3, wherein the box portion is provided with an earphone holding section for holding the earphone.