JP7061050B2 - Wireless charger - Google Patents

Description

The present invention relates to a wireless charger capable of charging a device such as a smartphone and supplying power to the device, and is provided with a cooling fan.

Conventionally, a wireless charger having a built-in fan is known as a wireless charger capable of wirelessly charging an object to be charged such as a smartphone (Non-Patent Document 1). For example, a wireless charger has a housing and a coil and fan provided within the housing. This wireless charger can charge objects to be charged, including coils. Specifically, in a wireless charger, when an object to be charged is placed on a housing, electromagnetic induction occurs between the coil of the object to be charged and the coil of the wireless charger. This allows the wireless charger to charge the object to be charged. Similarly, the wireless charger can also supply power to the object to be charged. In this wireless charger, the fan operates with the object to be charged mounted on the housing, and the wind generated by the fan is blown to the object to be charged to release the heat of the object to be charged.

“Amazon EverBright Qi Wireless Charger Quick Charge 2.0 iPhone® X / 8/8 Plus / Galaxy S8 / S8 Plus / S7 / S7 Edge / S6 / S6 Edge / Note 8 / Note 5 Compatible Other Qi Compatible models qi charger ”, [Search on July 30, 2018], Internet <URL: https://www.amazon.co.jp/dp/B07BCF2JDK/ref=sspa_dk_detail_0?psc=1&pd_rd_i=B07BCF2JDK>

However, with the above wireless charger, there is a risk that the cooling of the object to be charged will be insufficient.

An object of the present invention is to provide a wireless charger having a built-in fan and having further improved cooling performance.

The wireless charger of the present invention has a bottomed housing with an open top side, a support surface arranged so as to cover the top side of the housing and supporting a charging object including a power receiving coil, and a support surface in the housing. A power transmission coil provided on the bottom side of the housing with respect to the support surface and capable of non-contact charging with respect to the power receiving coil, and a power transmission coil provided on the bottom side of the power transmission coil in the housing. A fan is provided, and the support surface is formed with at least one groove extending from the outer edge side toward the center side, and the fan passes through the groove from the outer edge side of the support surface to the power transmission coil. Create a heading wind.

According to this configuration, the wind generated by the fan passes through the groove from the outer edge side toward the central surface portion side, and therefore hits the power transmission coil after hitting the object to be charged. Therefore, the object to be charged can be directly cooled by the air drawn from the outside (outer edge side) to the central surface portion side.

In the wireless charger, the support surface has a central surface portion located at the center, and the support surface is formed with a communication hole for communicating the end portion of the groove on the central surface portion side and the inside of the housing. You may.

According to such a configuration, the groove extending from the outer edge side of the support surface to the central surface portion side communicates with the communication hole communicating with the inside of the housing at the end portion on the central surface portion side, so that suction into the housing can be ensured. Therefore, the wind passing through the groove and toward the power transmission coil flows smoothly, so that the cooling performance can be ensured.

In the wireless charger, the support surface is provided around the central surface portion, is located on the top side of the central surface portion, and has an outer peripheral surface portion that supports the charging object. The groove may be arranged on the outer peripheral surface portion and may extend from the outer edge to the inner edge on the outer peripheral surface portion.

According to such a configuration, since the wind generated by the fan flows not only in the housing but also between the charging object and the central surface portion, it is possible to cool the portion of the charging object that overlaps with the central surface portion.

From the above, according to the present invention, it is possible to provide a wireless charger having a built-in fan and having further improved cooling performance.

FIG. 1 is a perspective view of a wireless charger according to the present embodiment. FIG. 2 is an exploded perspective view of the charger. FIG. 3 is a plan view of the charger. FIG. 4 is a plan view of the charger in a state where an object to be charged is arranged. FIG. 5 is a cross-sectional view taken along the line VV of FIG. FIG. 6 is a partially enlarged view of FIG.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 6. The wireless charger is, for example, a charger capable of wirelessly charging an object to be charged in a state of non-contact with the object to be charged such as a smartphone or a tablet terminal.

As shown in FIG. 1, the wireless charger 1 (hereinafter, also simply referred to as “charger 1”) has a bottomed housing 2 with an open top side and a top side (upper side in FIG. 1) of the housing 2. It is provided with a support surface 30 that is arranged so as to cover and supports an object to be charged. Further, as shown in FIG. 2, the charger 1 has a power transmission coil 4 provided on the bottom side (lower side in FIG. 1) of the housing 2 with respect to the support surface 30 in the housing 2, and the inside of the housing 2. The fan 5 provided on the bottom side of the power transmission coil 4 in the above is provided. The charger 1 of the present embodiment includes a support member 3 having a support surface 30, a filter 8 arranged between the support surface 30 and the power transmission coil 4, a base 40 on which the power transmission coil 4 and the like are placed, and a fan 5. It is provided with a partition plate 50 on which the is placed, a non-slip 20 provided on the bottom surface of the housing 2, and the like.

As shown in FIG. 4, the charger 1 of the present embodiment charges the battery pack 90 built in the smartphone 9 and including the power receiving coil 91 by placing the smartphone 9 which is the object to be charged on the support surface 30. do. Further, in the charger 1 of the present embodiment, as shown in FIG. 5, the smartphone 9 is placed on the support surface 30 arranged in a posture parallel to the floor S. The smartphone 9 being charged by the charger 1 of the present embodiment may be operable. For example, the charger 1 may be able to charge (power) the smartphone 9 while viewing a moving image on the smartphone 9.

The housing 2 has a shape in which the top side is open and the bottom side is closed (see FIG. 1). The housing 2 of the present embodiment includes a cylindrical side portion 21 extending from the top side to the bottom side and a bottom portion 22 that closes the bottom side of the side portion 21 (see FIG. 2). The outer peripheral surface of the side portion 21 is, for example, a smooth curved surface. The edge 210, which is the top edge of the side portion 21, and the edge 211 on the bottom side of the side portion 21 both have a substantially circular shape. On the inner peripheral surface of the side portion 21, a plurality of projecting portions 212 projecting inward in the surface direction of the support surface 30 are provided. The projecting portion 212 of the present embodiment is formed on the top side of the housing 2 as compared with the fan 5 (see FIG. 5).

Further, the side portion 21 is provided with a ventilation hole 213 and an insertion hole 214 which are through holes penetrating in the thickness direction of the side portion 21 (see FIG. 2). The ventilation hole 213 is a hole for allowing air to flow between the inside of the housing 2 and the outside of the housing 2. The inside of the housing 2 is an inner region surrounded by the housing 2, and the outside of the housing 2 is an outer region exposed from the housing 2. A plurality of ventilation holes 213 of the present embodiment are provided. Further, the ventilation hole 213 of the present embodiment is formed on the bottom side of the housing 2 as compared with the fan 5 (see FIG. 5). Further, the plurality of ventilation holes 213 of the present embodiment are arranged at equal intervals in the circumferential direction of the end edges 210 and 211 (see FIG. 2). The insertion hole 214 can be inserted with a cable that electrically connects the external power supply to the power transmission coil 4 and the fan 5. The bottom portion 22 has a plate shape, for example, a substantially disk shape. Further, the bottom portion 22 is placed on the floor S via the non-slip 20 (see FIG. 5). The shape of the non-slip 20 is, for example, a disk shape. The material of the non-slip 20 is, for example, rubber or silicon.

The support member 3 is a substantially disk-shaped member and is arranged on the top side of the housing 2 (see FIGS. 1 and 2). The support member 3 of the present embodiment includes a central portion 32 located at the center of the support surface 30 in the surface direction, an outer edge portion 33 including an outer edge in the surface direction, and a connecting portion 34 connecting the central portion 32 and the outer edge portion 33. , (See FIGS. 1 and 3). The shape of the central portion 32 is a disk shape. The shape of the outer edge portion 33 is an annular plate shape. The outer edge portion 33 is arranged around the central portion 32. The shape of the connecting portion 34 is an annular plate shape. The connecting portion 34 connects the outer edge of the central portion 32 and the inner edge of the outer edge portion 33.

The support surface 30 is a main surface of the support member 3 located on the top side of the housing 2. For example, the support surface 30 has a substantially circular shape. Further, the support surface 30 has a central surface portion 300 located at the center in the surface direction. Further, the support surface 30 of the present embodiment has an outer peripheral surface portion 301 provided around the central surface portion 300. Further, the support surface 30 of the present embodiment has a connecting surface portion 302 that connects the central surface portion 300 and the outer peripheral surface portion 301.

The support surface 30 of this embodiment has an uneven shape. Specifically, the support surface 30 is provided with at least one groove 305 extending from the outer edge 304 side of the support surface 30 toward the central surface portion 300. The groove 305 is recessed in the support surface 30 toward the bottom side. Further, the groove 305 allows air to pass from the outer edge 304 side to the central surface portion 300 side in the surface direction of the support surface 30. A plurality of grooves 305 are provided on the support surface 30 of the present embodiment. Further, the groove 305 of the present embodiment is arranged on the outer peripheral surface portion 301. Further, the groove 305 of the present embodiment extends from the outer edge to the inner edge in the surface direction in the outer peripheral surface portion 301.

Further, since the support surface 30 of the present embodiment has an uneven shape, the position of the support surface 30 in the normal direction, that is, the height from the floor S to the support surface 30 when the charger 1 is installed on the floor S is set. It is non-uniform (see FIG. 5). Specifically, the outer peripheral surface portion 301 is located on the top side of the housing 2 with respect to the central surface portion 300. That is, the central surface portion 300 is located on the bottom side of the housing 2 as compared with the outer peripheral surface portion 301. Further, the connecting surface portion 302 is located on the bottom side of the housing 2 as compared with the central surface portion 300. With the above configuration, when the smartphone 9 is installed on the support surface 30, the outer peripheral surface portion 301 supports the smartphone 9 in a state of being in contact with the smartphone 9, so that the outer peripheral ventilation path F1 is connected to the smartphone 9 by the groove 305. To form. When the smartphone 9 is installed on the support surface 30, the connecting surface portion 302 is separated from the smartphone 9 on the bottom side of the housing 2. When the smartphone 9 is installed on the support surface 30, the central surface portion 300 forms a top-side central ventilation path F2 with the smartphone 9 by being separated from the smartphone 9 on the bottom side of the housing 2.

Further, the support surface 30 of the present embodiment is provided with a communication hole 306 for communicating the end portion 3050 on the central surface portion 300 side of the groove 305 and the inside of the housing 2 (see FIGS. 1 and 3). That is, the communication hole 306 communicates the outside of the housing 2 with the inside of the housing 2. The communication hole 306 allows air to pass through the housing 2 from the end 3050 of the groove 305. The communication hole 306 is located on the central surface portion 300 side of the groove 305 in the surface direction of the support surface 30. The communication hole 306 of the present embodiment is arranged in the connecting surface portion 302. That is, the communication hole 306 of the present embodiment is located between the outer edge 304 and the central surface portion 300 in the plane direction of the support surface 30.

The distance between the adjacent grooves 305 is constant in the arrangement direction of the plurality of grooves 305. Specifically, the plurality of grooves 305 are arranged at equal intervals in the circumferential direction of the outer peripheral surface portion 301. Each groove 305 has the same shape. Further, the dimensions such as the width and the depth of each groove 305 are the same. The groove 305 of the present embodiment extends from the outer edge to the inner edge of the outer peripheral surface portion 301 in the surface direction of the support surface 30. Further, the groove 305 of the present embodiment has a substantially rectangular shape when viewed from the normal direction of the support surface 30. Further, the grooves 305 of the present embodiment are arranged radially when viewed from the normal direction of the support surface 30. Specifically, each of the plurality of grooves 305 extends linearly from the outer edge 304 toward the center of the central surface portion 300.

The distance between the adjacent communication holes 306 is constant in the arrangement direction of the plurality of communication holes 306. Specifically, the plurality of communication holes 306 are arranged at equal intervals in the circumferential direction of the connecting surface portion 302. Each communication hole 306 has the same shape. Further, the dimensions such as the width of each communication hole 306 are the same. The communication hole 306 of the present embodiment extends from the outer edge to the inner edge of the connecting surface portion 302 in the surface direction of the support surface 30. Further, the communication hole 306 of the present embodiment has a substantially rectangular shape. Further, at least one of the plurality of communication holes 306 of the present embodiment is continuous with the groove 305 (for example, the end portion 3050 of the groove 305) formed in the outer peripheral surface portion 301 when viewed from the normal direction of the support surface 30. are doing. Further, the communication holes 306 of the present embodiment are arranged radially. Specifically, each of the plurality of communication holes 306 extends linearly from the outer edge of the connecting surface portion 302 toward the center of the central surface portion 300 in the plane direction of the support surface 30.

The support member 3 of the present embodiment has an opposite surface 31 located on the opposite side of the support surface 30 in the thickness direction of the support member 3. The opposite surface 31 is a main surface located on the bottom side of the housing 2 as compared with the support surface 30. The opposite surface 31 has a substantially circular shape. Further, the opposite surface 31 is a connection opposite surface that connects the central opposite surface 310 located in the center in the surface direction, the outer peripheral opposite surface 311 provided around the central opposite surface 310, and the central opposite surface 310 and the outer peripheral opposite surface 311. It has a surface 312 and. The central opposite surface 310 overlaps the central surface portion 300 when viewed from the thickness direction of the support member 3. Further, the central opposite surface 310 is separated from the power transmission coil 4 on the top side of the housing 2 to form a bottom side central ventilation path F3 with the power transmission coil 4 (see FIG. 5). The outer peripheral surface opposite surface 311 overlaps the outer peripheral surface portion 301 when viewed from the thickness direction of the support member 3. The connection opposite surface 312 overlaps with the connection surface portion 302 when viewed from the thickness direction of the support member 3. Further, the connecting opposite surface 312 defines the end edge on the bottom side of the communication hole 306.

The support member 3 of the present embodiment includes a cover 6 and a lid portion 7 (see FIG. 2). Therefore, the support surface 30 is a cover top surface 60 located on the top side of the housing 2 in the main surface of the cover 6, and a lid top surface 60 located on the top side of the housing 2 in the main surface of the lid portion 7. Includes some of the 70. The lid portion 7 also has a lid portion bottom surface 73 located on the bottom side of the housing 2.

The shape of the lid portion 7 is substantially a disk shape. The material of the lid portion 7 is, for example, ABS resin. The lid portion 7 of the present embodiment includes a lid central portion 71 located in the center of the lid portion 7 and a lid annular portion 72 located around the lid central portion 71. The lid portion 7 is arranged on the top side of the housing 2 by being placed on the end surface 2120 on the top side of the projecting portion 212 of the housing 2 via the base 40. The lid portion 7 of the present embodiment is fixed to the base 40 by, for example, a screw.

The lid central portion 71 is a disk-shaped portion that closes the inside of the housing 2. Further, the lid central top surface 700 corresponding to the lid central portion 71 of the lid portion top surface 70 constitutes the central surface portion 300. The lid central portion 71 of the present embodiment has a protruding portion 712 protruding from the lid central bottom surface 701 corresponding to the lid central portion 71 of the lid central bottom portion 73 to the bottom side (see FIG. 5). In the lid central portion 71, a plurality of projecting portions 712 are arranged. The plurality of projecting portions 712 are arranged at intervals in the circumferential direction of the lid central portion 71.

The lid annular portion 72 has an annular shape and has an annular shape with the inner lid annular portion 721 located inside in the plane direction of the top surface 70 of the lid, and is outward in this plane direction. It has an outer lid annular site 722 located (see FIG. 2). The outer lid annular portion 722 is continuous with the outer edge of the inner lid annular portion 721 in this plane direction. The inner lid annular portion 721 is continuous with the outer edge of the lid central portion 71 in this plane direction. Further, the inner lid annular portion 721 is provided with a through hole 723 as a communication hole 306 provided in the support surface 30.

The portion corresponding to the inner lid annular portion 721 of the top surface 70 of the lid portion constitutes the connecting surface portion 302. In the top surface 70 of the lid portion of the present embodiment, the portion corresponding to the inner lid annular portion 721 is located on the bottom side of the housing 2 with respect to the portion corresponding to the central portion 71 of the lid. Further, on the top surface 70 of the lid portion, the portion corresponding to the inner lid annular portion 721 is located on the bottom side of the housing 2 with respect to the portion corresponding to the outer lid annular portion 722.

The shape of the cover 6 is an annular plate shape. The cover 6 is a member that regulates the relative position of the smartphone 9 with respect to the support surface 30. Further, the cover 6 is non-slip. The coefficient of friction of the material of the cover 6 may be larger than the coefficient of friction of the material of the mounting surface 92 of the smartphone 9. Further, the friction coefficient of the material of the cover 6 may be larger than the friction coefficient of the material of the lid portion 7. Specifically, the material of the cover 6 is rubber or resin such as natural rubber, synthetic rubber, EVA resin, and PVC resin.

The cover top surface 60 of this embodiment constitutes an outer peripheral surface portion 301. Further, the cover top surface 60 of the present embodiment has an uneven shape. Specifically, the cover top surface 60 is provided with a groove 62 extending from the outer edge 61 side of the cover 6 toward the center side as a groove 305 provided on the support surface 30. The cover 6 is placed on the lid portion 7. Specifically, the cover 6 is placed on the outer lid annular portion 722. The cover 6 of the present embodiment is fixed to the outer lid annular portion 722 with, for example, an adhesive or double-sided tape.

With the above configuration, when the support member 3 is viewed from the support surface 30 side in a plan view, the cover 6, the inner lid annular portion 721 of the lid portion 7, and the lid center portion 71 are arranged side by side in this order from the outside to the inside in the plane direction. ..

The power transmission coil 4 can be connected to an external power source by wire. Further, when the power transmission coil 4 is connected to an external power source and the power receiving coil 91 of the smartphone 9 is stacked at intervals within a predetermined distance, the power transmission coil 4 is electromagnetically connected to the power receiving coil 91. Induction occurs. As a result, the power transmission coil 4 can be wirelessly charged without contacting the power receiving coil 91. The size of the power transmission coil 4 of the present embodiment is substantially the same as the size of the power reception coil 91 (see FIG. 2). Specifically, the radius of the power transmission coil 4 of the present embodiment is substantially the same as the radius of the power receiving coil 91, for example. Further, the power transmission coil 4 of the present embodiment is mounted on the base 40 via a disk 41 provided with a through hole 42 in the center. Specifically, the power transmission coil 4 is placed on the base 40 in a state where the center of the power transmission coil 4 is overlapped with the center of the through hole 42.

The base 40 is mounted on the projecting portion 212 of the housing 2. Further, the base 40 includes a central portion 44 provided with a through hole 43 in the center and an outer peripheral portion 46 located on the top side of the housing 2 with respect to the central portion 44 (see FIG. 2). The base 40 of the present embodiment also includes a tubular portion 45 that surrounds the central portion 44 and extends from the bottom side to the top side of the housing 2. The outer peripheral portion 46 supports the lid portion 7. The tubular portion 45 connects the outer edge of the central portion 44 and the inner edge of the outer peripheral portion 46.

The central portion 44 has a projecting portion 441 projecting from the top surface 440, which is a surface of the central portion 44 located on the top side of the housing 2, to the top side. The outer edge of the support surface 30 in the projecting portion 441 in the plane direction is continuous with the tubular portion 45. Further, the projecting top surface 444 located on the top side of the projecting portion 441 has an inner projecting top surface 442 located inside in the surface direction of the support surface 30 and an outer projecting top surface located on the outside in the surface direction. 443 and the like. The inner protruding top surface 442 is located on the bottom side of the housing 2 with respect to the outer protruding top surface 443. The inner protruding top surface 442 supports the power transmission coil 4 via the disk 41. Therefore, a space α is generated between the bottom surface 402 of the power transmission coil 4 and the top surface 440 of the central portion 44 (see FIG. 5). The central portion 44 of the present embodiment also supports the protruding portion 712 of the lid central portion 71. The outer protruding top surface 443 supports the filter 8.

The filter 8 is a plate member or a net member provided with a plurality of through holes. Further, the shape of the filter 8 is an annular shape. The material of the filter 8 is, for example, a material having high thermal conductivity. Specifically, the material of the filter 8 is, for example, metal. The filter 8 of the present embodiment is arranged at a position overlapping the communication hole 306 when viewed from the normal direction of the support surface 30.

The fan 5 can be connected to an external power source by wire. Further, the fan 5 can generate a wind from the top side to the bottom side of the housing 2 in a state of being connected to an external power source. Specifically, the fan 5 can generate wind from the outer edge 304 side of the support surface 30 through the groove 305 toward the power transmission coil 4. The fan 5 of the present embodiment has a distribution port 51 for circulating the generated wind. Further, the fan 5 of the present embodiment is mounted on the housing 2 via the partition plate 50. The fan 5 of the present embodiment generates wind from the start to the completion of charging and feeding the power receiving coil 91 by the power transmission coil 4.

With the above configuration, in the charger 1 of the present embodiment, from the top side to the bottom side inside the housing 2, the cover 6, the lid portion 7, the filter 8, the power transmission coil 4, the base 40, the fan 5, and the partition plate are used. 50 are arranged side by side in order.

Further, the flow of wind in the charger 1 will be specifically described with reference to FIGS. 5 and 6. The wind generated by the fan 5 flows from the outside in the surface direction of the support surface 30 through the outer peripheral ventilation passage F1 and branches into two ventilation passages, for example, the top central ventilation passage F2 and the bottom central ventilation passage F3, at the communication hole 306. do. Specifically, this wind flows through the outer peripheral ventilation path F1 and the top central ventilation path F2 along the mounting surface 92 of the smartphone 9, and also flows along the top surface 401 of the power transmission coil 4. It flows through the internal ventilation path F4 including F3. A part of the wind that has passed through the central ventilation path F2 on the heaven side collides with the wind that has flowed from the side opposite to the direction in which the wind has flowed in the plane direction at the center of the support surface 30, and the direction in which the wind has flowed. Flows out in a different direction. For example, the wind flowing from both ends of the smartphone 9 in the longitudinal direction through the outer peripheral ventilation path F1 and the top central ventilation path F2 collides with each other at the center of the support surface 30 and turns to both sides in the lateral direction of the smartphone 9. Flow out. The wind that has passed through the internal ventilation passage F4 flows from the inside of the housing 2 to the outside of the housing 2 through the ventilation holes 213 formed in the housing 2.

The outer peripheral ventilation passage F1 extends from the outer edge 304 side of the support surface 30 to the communication hole 306 through the groove 305, and is partitioned by the outer peripheral surface portion 301 and the mounting surface 92 of the smartphone 9.

The top central ventilation passage F2 extends from the entrance of the communication hole 306 (the portion surrounded by the support surface 30 of the communication hole 306) to the center of the support surface 30 in the plane direction of the support surface 30, and the central surface portion 300 and the smartphone 9 It is partitioned by the mounting surface 92 of.

The internal ventilation passage F4 extends from the entrance of the communication hole 306 to the exit of the communication hole 306 (a portion surrounded by the opposite surface 31 of the communication hole 306), and the inflow ventilation passage F5 composed of the communication hole 306 and the communication hole. A bottom central ventilation path F3 extending from the outlet of 306 to the inner edge of the top surface 401 of the power transmission coil 4 and partitioned by the center opposite surface 310 and the top surface 401 of the power transmission coil 4. (See FIG. 6). Further, the internal ventilation passage F4 is from the inner end edge of the top surface 401 of the power transmission coil 4 to the exit of the through hole 43 of the base 40 (at the bottom surface of the housing 2 in the central portion 44 of the through hole 43). It includes a first outflow air passage F6 that extends to the enclosed portion) and is composed of the inside of the power transmission coil 4, the through hole 42 of the disk 41, and the through hole 43 of the base 40. Further, the internal ventilation passage F4 extends from the through hole 43 of the base 40 to the distribution port 51 of the fan 5, extends from the distribution port 51 to the ventilation hole 213 through the inside of the fan 5, and is housed through the ventilation hole 213. Includes a second outflow vent F6 extending outward of body 2 (see FIG. 5).

According to the above charger 1, the wind generated by the fan 5 passes through the groove 305 from the outer edge 304 side of the support surface 30 toward the central surface portion 300 side, and therefore hits the power transmission coil 4 after hitting the charging object. .. Therefore, the smartphone 9 can be directly cooled by the air drawn from the outside (outer edge 304 side) to the central surface portion 300 side.

According to the charger 1 of the present embodiment, the groove 305 extending from the outer edge 304 side of the support surface 30 to the central surface portion 300 side communicates with the inside of the housing 2 at the end portion 3050 on the central surface portion 300 side. Since it communicates with the housing 2, it is possible to secure suction into the housing 2. Therefore, the wind passing through the groove 305 and toward the power transmission coil 4 flows smoothly, so that the cooling performance can be ensured. Specifically, in the support surface 30, since the communication holes 306 are arranged around the central surface portion 300 and the grooves 305 are formed radially, the wind generated by the fan 5 is congested (congested) in the central surface portion 300. It flows smoothly by being sucked into the housing 2 from the communication hole 306 before it stays.

Further, according to the charger 1 of the present embodiment, the wind generated by the fan 5 flows not only in the housing 2 but also between the smartphone 9 and the central surface portion 300 of the support surface 30, so that the central surface portion of the smartphone 9 is formed. The part that overlaps with 300 can be cooled.

Further, according to the charger 1 of the present embodiment, the wind generated by the fan 5 passes through the groove 305 from the outer edge 304 side of the support surface 30, that is, after passing through the outer peripheral ventilation path F1, and then with the central surface portion 300. The top central ventilation path F2 that flows between the smartphone 9 and the center side of the support surface 30 and the bottom central ventilation path F3 that flows between the center opposite surface 310 and the power transmission coil 4 toward the center side of the opposite surface 31. Since the flow is branched, the power transmission coil 4 can be cooled in addition to the smartphone 9. Specifically, the wind flowing through the top central ventilation path F2 can cool the smartphone 9 (power receiving coil 91) and the central surface portion 300. Further, the wind flowing through the bottom central ventilation passage F3 can cool the power transmission coil 4 and the central opposite surface 310.

According to the charger 1 of the present embodiment, the wind flowing through the bottom central ventilation passage F3 also flows to the outflow ventilation passage F6, that is, to the inside of the transmission coil 4, so that the transmission coil 4 is moved inward and outward. It can be cooled from both sides.

Further, according to the charger 1 of the present embodiment, a part of the heat generated by the power transmission coil 4 is transferred to the projecting portion 441 via the disk 41 and the inner projecting top surface 442, and the transferred heat is transferred to the projecting portion 441. It is transmitted to the filter 8 via the outer protruding top surface 443 and is discharged from the filter 8. In this way, a part of the heat generated in the power transmission coil 4 is dissipated through the filter 8. Moreover, according to the charger 1 of the present embodiment, since the filter 8 is arranged directly under the communication hole 306, even if the heat generated by the power transmission coil 4 is transferred to the filter 8, the wind flowing from the communication hole 306 Therefore, the filter 8 can be effectively cooled.

Further, according to the charger 1 of the present embodiment, there is a space α between the bottom surface 402 of the power transmission coil 4 and the top surface 440 of the central portion 44, that is, the base 40 is the central portion 44. Since the power transmission coil 4 is supported in a floating state from the top surface 440, the heat generated by the power transmission coil 4 is not easily transferred to the bottom side in the housing 2. Therefore, this heat is unlikely to affect the members arranged on the bottom side in the housing 2 such as the fan 5.

According to the charger 1 of the present embodiment, since the ventilation hole 213 is arranged on the bottom side of the housing 2 rather than the fan 5, the wind flowing into the housing 2 from the top side is received from the bottom side. It can be smoothly discharged to the outside of the body 2.

According to the charger 1 of the present embodiment, since the cover 6 is non-slip, if the smartphone 9 is placed on the support surface 30 with the power receiving coil 91 overlapped with the power transmission coil 4, the position of the smartphone 9 shifts. It is difficult to charge the smartphone 9 properly.

It should be noted that the charger of the present invention is not limited to the above embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention. For example, the configuration of one embodiment can be added to the configuration of another embodiment, and a part of the configuration of one embodiment can be replaced with the configuration of another embodiment. In addition, some of the configurations of certain embodiments can be deleted.

For example, in the charger 1 of the above embodiment, the smartphone 9 is placed on the support surface 30 arranged in a posture parallel to the floor S, but the support surface arranged in an inclined posture with respect to the floor S. It may be placed on the 30th. For example, the charger 1 may be a stand-type charger that can be charged with the smartphone 9 leaning against it. Further, the shape of the charger 1 may be a rectangular parallelepiped shape having a rectangular support surface 30 or the like. Further, the charger 1 may include a housing 2, a power transmission coil 4, and a fan 5, and may not include, for example, a filter 8.

Although the support member 3 of the above embodiment includes the cover 6 and the lid portion 7, it may be composed of one member. In this case, the support surface 30 may be a surface located on the top side of the housing 2 in one member constituting the support member 3.

The support surface 30 does not have to include an uneven shape other than the groove 305. For example, the support member 3 may be composed of only the flat plate-shaped lid portion 7, and the groove 305 may be formed in a region located on the outer periphery of the flat plate-shaped lid portion 7 in the surface direction.

Further, the support surface 30 does not have to include a portion that closes the inside of the housing 2. For example, the central surface portion 300 may be provided with an opening that opens the inside of the housing 2. Further, the support surface 30 does not have to include the central surface portion 300. That is, the support surface 30 may be annular. When the support surface 30 is annular in this way, the wind generated by the fan 5 passes through the groove 305 from the outer edge 304 side of the support surface 30 and heads for the power transmission coil 4. Further, if the central surface portion 300 is provided with a through hole and is located on the bottom side of the housing 2 with respect to the outer peripheral surface portion 301 in which the groove 305 is formed, the support surface 30 (for example, the connecting surface portion 302) can be formed. It does not have to include the communication hole 306. Also in this case, the wind generated by the fan 5 passes through the groove 305 from the outer edge 304 side of the support surface 30 and heads toward the power transmission coil 4.

Further, even in such a case, the wind generated by the fan 5 passes through the groove 305 from the outer edge 304 side toward the central surface portion 300 side, and therefore hits the power transmission coil 4 after hitting the charging object. Therefore, the smartphone 9 can be directly cooled by the air drawn from the outside (outer edge 304 side) to the central surface portion 300 side.

The spacing between adjacent grooves 305 does not have to be uniform in the arrangement direction of the plurality of grooves 305. Further, the number of grooves 305 provided on the support surface 30 may be one. The shape of the groove 305 when viewed from the normal direction of the support surface 30 is not limited to a substantially rectangular shape, but may be an annular shape, an elliptical shape, a circular shape, a square shape, or any other polygonal shape, for example. It may have an annular shape provided on the connecting surface portion 302 so as to be continuous in the circumferential direction of the connecting surface portion 302. Further, the groove 305 does not have to extend in a straight line, and may extend in a curved line from the outer edge 304 side to the central surface portion 300 side, for example.

Similar to the groove, various forms can be taken with respect to the arrangement and number of the communication holes 306 and the shape of the support surface 30 when viewed from the normal direction. For example, the communication hole 306 may be located closer to the outer edge 304 than the groove 305 in the plane direction of the support surface 30. Further, the communication hole 306 may be arranged at a position including the outer edge 304 or at a position including the center of the central surface portion 300 in the surface direction of the support surface 30. Even in such a case, the wind generated by the fan 5 branches into the inside and the outside of the housing 2 and flows.

The communication hole 306 does not have to communicate the end 3050 on the central surface portion 300 side of the groove 305 with the inside of the housing 2. For example, when viewed from the normal direction of the support surface 30, the communication hole 306 formed in the connecting surface portion 302 may be separated from the groove 305 formed in the outer peripheral surface portion 301. Even in this case, if the connecting surface portion 302 is located on the bottom side of the housing 2 with respect to the outer peripheral surface portion 301 in which the groove 305 is formed, the wind generated by the fan 5 is grooved from the outer edge 304 side of the support surface 30. It passes through 305 and heads for the power transmission coil 4.

The number of ventilation holes 213 provided in the housing 2 may be one. In this case, the ventilation hole 213 may be a through hole that is continuous in the circumferential direction of the edge 210 of the housing 2. The housing 2 may not be provided with the ventilation hole 213.

The power transmission coil 4 may charge or supply power to the power receiving coil 91 by a phenomenon other than electromagnetic induction, for example, magnetic field resonance.

The fan 5 is used for at least a part of the period from the start to the completion of charging and power supply to the power receiving coil 91 by the power transmission coil 4, for example, from the start to the completion of charging and power supply to the power receiving coil 91 by the power transmission coil 4. Of these, when the temperature of the smartphone 9 or the temperature of the power transmission coil 4 exceeds a certain temperature, wind may be generated.

1 ... Charger (wireless charger), 2 ... Housing, 21 ... Side, 22 ... Bottom, 210, 211 ... Edge, 212 ... Protruding part, 2120 ... End face, 213 ... Ventilation hole, 214 ... Insertion hole 3, ... Support member, 30 ... Support surface, 300 ... Central surface portion, 301 ... Outer peripheral surface portion, 302 ... Connecting surface portion, 304 ... Outer edge, 305 ... Groove, 3050 ... End portion, 306 ... Communication hole, 31 ... Opposite surface, 310 ... Central opposite surface, 311 ... Outer peripheral opposite surface, 312 ... Connecting opposite surface, 32 ... Central part, 33 ... Outer edge part, 34 ... Connecting part, 4 ... Transmission coil, 40 ... Base, 401, 402 ... Surface, 41 ... Disk, 42, 43 ... Through hole, 44 ... Central part, 440 ... Top surface, 441 ... Projection site, 442 ... Inner projecting top surface, 443 ... Outer projecting top surface, 444 ... Projecting top surface, 45 ... Cylindrical part, 46 ... Outer peripheral part, 5 ... Fan, 50 ... Partition plate, 51 ... Distribution port, 6 ... Cover, 60 ... Cover top surface, 61 ... Outer edge, 62 ... Groove, 7 ... Lid part, 70 ... Lid Top surface, 700 ... Central top surface of the lid, 701 ... Central bottom surface of the lid, 71 ... Central part of the lid, 712 ... Protruding part, 72 ... Circular part of the lid, 721 ... Circular part of the inner lid, 722 ... Outer ring part of the lid, 723 ... through hole, 73 ... bottom of lid, 8 ... filter, 9 ... smartphone, 90 ... battery pack, 91 ... power receiving coil, 92 ... mounting surface, α ... space, F1 ... outer ventilation path, F2 ... top center ventilation Road, F3 ... bottom central ventilation passage, F4 ... internal ventilation passage, F5 ... inflow ventilation passage, F6 ... first outflow ventilation passage, F7 ... second outflow ventilation passage, S ... floor

Claims (3)

A bottomed housing with an open top and
A support surface arranged so as to cover the top side of the housing and supporting a charging object including a power receiving coil,
A power transmission coil provided on the bottom side of the housing with respect to the support surface in the housing and capable of non-contact charging with respect to the power receiving coil.
A fan provided on the bottom side of the power transmission coil in the housing, and
Equipped with
At least one groove extending from the outer edge side toward the center side is formed on the support surface.
The fan is a wireless charger that generates wind from the outer edge side of the support surface through the groove and toward the power transmission coil. The support surface has a central surface portion located at the center and has a central surface portion.
The wireless charger according to claim 1, wherein the support surface is formed with a communication hole that communicates the end of the groove on the central surface side with the inside of the housing. The support surface is provided around the central surface portion, is located on the top side of the central surface portion, and has an outer peripheral surface portion that supports the charging object.
The wireless charger according to claim 2, wherein the groove is arranged on the outer peripheral surface portion and extends from the outer edge to the inner edge on the outer peripheral surface portion.

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