JP2011160518A - Electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a means for easily handling a power supplied device during charging by preventing the power supplied device from being easily detached from a power feeding device during charging while employing noncontact power transmission. <P>SOLUTION: An electronic apparatus includes the power feeding device 2, and a cellular phone 3 supplied with power from the power feeding device 2 in a state that it is connected to the power feeding device 2. The power feeding device 2 includes a converter 21, a high-frequency oscillation circuit 22 and a power transmission coil 23, wherein the converter 21 and the high-frequency oscillation circuit 22 are covered with a first casing 24 and the power transmission coil 23 is covered with a second casing 25. The high-frequency oscillation circuit 22 and the power transmission coil 23 are connected to each other through a power supply cord 26. The second casing 25 can be engaged with the cellular phone 3, the power transmission coil 23 opposes a power reception coil 31 equipped on the cellular phone 3 in a state that the second casing 25 is engaged with the cellular phone 3, and power is transmitted by noncontact power transmission from the power transmission coil 23 to the power reception coil 31. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electronic device in which a power-supplied device is fitted in the power supply device and power is supplied from the power supply device to the power-supplied device by non-contact power transmission.

  Portable power-supplied devices such as mobile phones, PHS, electric toothbrushes, and electric shavers are often provided with a rechargeable secondary battery. There are two types of charging methods for secondary batteries. One is contact-type power transmission in which a power supply device and a power-supplied device are connected via a connector and power is supplied from the power supply device to the power-supplied device. The other is contactless power transmission in which power is supplied from the power supply apparatus to the power-supplied apparatus using electromagnetic induction without bringing the power supply apparatus and the power-supplied apparatus into contact with each other.

  As a device that performs power transmission by contact-type power transmission and non-contact power transmission, Patent Document 1 discloses a non-contact power supply adapter. The non-contact power supply adapter is detachably attached by a magnet to a non-contact power supply unit that is arranged on a building wall or the like and generates a high-frequency magnetic field. Electric power is transmitted from the non-contact power supply unit to the non-contact power supply adapter by non-contact power transmission. The non-contact power supply adapter is provided with a recess. The non-contact power supply adapter transmits power to the electric device mounted in the recess through a power supply terminal.

JP 2009-159686 A

  In recent years, since power-supplied devices such as mobile phones have been downsized, connectors used for contact-type power transmission are often small. If the user accidentally touches the conductive member exposed at the joint portion of the connector, the conductive member may be damaged or bent. This possibility is higher when the connector is small than when the connector is large. In addition, when water or the like adheres to the conductive member, the power feeding device or the power supplied device is erroneously energized, and the power feeding device or the power supplied device itself may be damaged.

  On the other hand, non-contact power transmission has the following problems. Normally, a power-supplied device that is charged by non-contact power transmission is not fixed to the power supply device at the time of charging. For example, the power-supplied device is simply placed on the power supply device along a guide provided in the power supply device during charging. Also, the power feeding device is rarely used in a fixed manner, and is often used in a state where it is placed on a desk or the like. In this case, if power is applied from the outside during charging, the power-supplied device is easily detached from the power feeding device, and thus there is a possibility that charging cannot be performed. In addition, the method of placing the power feeding device and the power supplied device during charging is limited to a mode in which the power supplied device is placed on the power feeding device placed on a desk or the like as described above.

  In the case of non-contact power transmission, the power feeding device includes a converter that converts an AC signal input from a commercial power source or the like into a predetermined voltage, and a resonance that generates an AC signal having a predetermined frequency based on the voltage-converted AC signal. An AC signal generated by the circuit and the resonance circuit is input, and a power transmission coil that transmits power by electromagnetic induction is provided in a power reception coil provided in the power-supplied device. The converter, the resonance circuit, the power transmission coil, and the like are covered with the same exterior member and are handled integrally. However, when all of the converter, the resonance circuit, and the power transmission coil are provided in the exterior member, the size of the portion of the power supply device that contacts the power supplied device during charging increases. Therefore, it cannot be said that handling such as lifting or moving the power supply device and the power-supplied device during charging of the power-supplied device is necessarily easy.

  In addition, since the power-supplied device is easily detached from the power supply device during charging and the mode of charging is limited, and the power-supplied device is in contact with a large power supply device during charging, Use during charging is not always easy.

  In recent years, power-supplied devices that have a waterproof function and can be used for a long time in water are increasing. In order to use such a power-supplied device continuously in water for a long time, it is preferable that the power-supplied device can be charged in water and can be used during charging. However, in contact-type power transmission, as described above, the adhesion of water to the joint portion of the connector may cause a failure of the power feeding device or the power-supplied device, so that charging in water is difficult. Even in the case of non-contact power transmission, as described above, charging in water is difficult because the power supply device and the power supplied device are easily detached during charging and handling such as movement is not easy.

  The present invention has been made in view of the above problems, and an object of the present invention is to employ non-contact power transmission, but the powered device is not easily detached from the power feeding device during charging, and the power fed during charging is The object is to provide a means for easy handling of the apparatus.

(1) An electronic device of the present invention is an electronic device including a power feeding device and a power-supplied device to which power is supplied from the power feeding device. The power supply device includes a first signal conversion unit that converts an input AC signal of the first voltage into a second voltage, and an AC signal that is converted into the second voltage by the first signal conversion unit in advance. A signal generation unit that generates an AC signal having a set frequency, a power transmission coil that is connected to the signal generation unit via an electric wire, and that receives the AC signal generated by the signal generation unit, and the power transmission coil And an exterior member that covers. The power-supplied device includes a power receiving coil in which an AC signal is transmitted from the power transmitting coil by electromagnetic induction, a second signal conversion unit that generates a DC signal based on the AC signal output from the power receiving coil, and the second A secondary battery that receives and stores a DC signal generated by the signal conversion unit, and a fitted portion that is provided adjacent to the power receiving coil and is fitted to the exterior member. The power transmission coil and the power reception coil face each other in a state where the exterior member and the fitted portion are fitted.

  In the above-described configuration, only the power transmission coil is covered by the exterior member, and the first signal conversion unit and the signal generation unit are connected to the power transmission coil via an electric wire. The exterior member is fitted to a fitted portion provided in the power supplied device. Only a small exterior member covering only the power transmission coil is attached to the power-supplied device during charging. In addition, since the power transmission coil and the power reception coil face each other in a state where the exterior member and the fitted portion are fitted, it is possible to transmit power from the power transmission coil to the power reception coil by electromagnetic induction.

(2) The fitted portion is configured to be able to insert the exterior member. An engagement member that extends along the insertion direction of the exterior member, and that engages with both ends of the exterior member in the insertion direction so as to be slidable in the insertion direction; .

  In the above-described configuration, the exterior member can be inserted into the fitted portion while being engaged with the fitted portion by the engaging member. Therefore, the exterior member can be easily connected to the power supplied device.

(3) The exterior member further includes one of a convex portion and a concave portion that can be fitted to each other in the insertion direction. The fitting portion further includes the other of the convex portion and the concave portion at a position facing one of the convex portion and the concave portion provided in the exterior member. The said convex part and the said recessed part are provided with the holding member holding the state fitted mutually.

(4) The exterior member includes at least one convex portion and / or concave portion that can be fitted to each other. The fitted portion is the recess provided in a position facing the projection provided in the exterior member and / or the position provided in a position facing the recess provided in the exterior member. Consists of convex parts. The said convex part and the said recessed part are provided with the holding member holding the state fitted mutually.

  In these configurations, since the holding member holds the state in which the exterior member and the fitted portion are fitted, the connection between the power feeding device and the power fed device is unlikely to be disconnected.

(5) The exterior member conducts an alternating current signal to the first signal conversion unit, the signal generation unit, and the power transmission coil in a state where the exterior member and the fitted portion are fitted, and the exterior member And a switching unit that cuts off the conduction of the AC signal to the power transmission coil in the state where the fitting of the fitted part is released.

  In the above configuration, when the power feeding device and the power-supplied device are not connected, the switching unit cuts off the conduction of the AC signal to the first signal conversion unit, the signal generation unit, and the power transmission coil. . Therefore, it is possible to prevent wasted power from being consumed by power transmission from a commercial power source or the like to the power feeding device until the power fed device is not connected to the power feeding device.

(6) It is preferable that the switching unit is a mechanical switch that includes a movable unit and switches on and off by the movement of the movable unit.

(7) The switching unit is an electronic switch that includes a circuit unit and switches on and off based on a voltage applied to the circuit unit or a current flowing through the circuit unit.

  By configuring the switching unit with an electronic switch, it is possible to avoid the switching unit being exposed to the surface of the exterior member. This is preferable when the power-supplied device is charged in water.

  In the present invention, since the exterior member and the fitted portion are fitted, the connection between the power feeding device and the power supplied device is less likely to be disconnected than when the power supplied device is placed on the power feeding device. Moreover, only a small-sized exterior member is attached to the power supply apparatus during charging. That is, during charging, the power-supplied device to which the exterior member is attached and the power-feeding device other than the power transmission coil are connected via the electric wire. This facilitates handling such as movement of the power-supplied device during charging.

FIG. 1 is a perspective view showing a charging device 1 which is an example of an electronic device of the present invention, in which (A) shows a state seen from diagonally above, and (B) shows a state seen from diagonally below. It is shown. 2A and 2B are perspective views showing the mobile phone 3 and the second housing 25, where FIG. 2A shows a state seen from diagonally above, and FIG. 2B shows a state seen from diagonally below. Yes. FIG. 3 is a block diagram showing the configuration of the charging device 1, (A) shows the configuration of the power feeding device 2, and (B) shows the configuration of the mobile phone 3. 4A and 4B are a bottom view and a front view showing the mobile phone 3 and the second housing 25, wherein FIG. 4A shows a bottom view and FIG. 4B shows a front view. FIG. 5 is a perspective view showing the second housing 25. 6A and 6B are perspective views showing the second housing 25, in which FIG. 6A shows a state seen from diagonally above, and FIG. 6B shows a state seen from diagonally below. 7A and 7B are side views schematically showing the structure of the switching unit 253. FIG. 7A shows a state where the wiring is opened, and FIG. 7B shows a state where the wiring is short-circuited. ing. 8A and 8B are perspective views showing the mobile phone 3 and the second housing 25 in the first modification, in which FIG. 8A shows a state seen from obliquely below the front, and FIG. 8B shows seen obliquely from the rear. The state is shown, (C) shows the 2nd housing | casing 25, (D) shows the state seen from the back diagonally downward. FIG. 9 is a perspective view and a top view of the mobile phone 3 and the second housing 25 according to the second modification. FIG. 9A is a perspective view of the mobile phone 3 as viewed obliquely from below. The top view of the 2nd housing | casing 25 is shown.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings as appropriate. The embodiment described below is merely an example of the present invention, and it is needless to say that the embodiment of the present invention can be changed as appropriate without departing from the gist of the present invention.

  As shown in FIGS. 1 and 2, a mobile phone charging device 1, which is an example of the electronic device of the present invention, is supplied with power from a power supply device 2 (an example of the power supply device of the present invention) and the power supply device 2. Mobile phone 3 (an example of a powered device of the present invention).

  In the following description, as shown in FIG. 1A, the vertical direction is defined with reference to a state where the mobile phone 3 is installed with the liquid crystal display unit 342 as the front, and the liquid crystal display unit 342 is provided. The front-rear direction is defined with the side as the front side (front), and the left-right direction is defined when the mobile phone 3 is viewed from the front side (front).

[Power supply device 2]
As shown in FIG. 3A, the power feeding device 2 includes a converter 21 (an example of a first signal conversion unit of the present invention), a high-frequency oscillation circuit 22 (an example of a signal generation unit of the present invention), and a power transmission coil 23. (An example of a power transmission coil of the present invention).

  The converter 21 is composed of, for example, a power transformer. The converter 21 receives an AC signal of 100 V (an example of the first voltage of the present invention) from the commercial power supply 4 in Japan. The 100V AC signal input to the power transformer is converted to a voltage suitable for handling in subsequent circuits such as the high-frequency oscillation circuit 22 and the power transmission coil 23 (for example, 12V AC voltage, an example of the second voltage of the present invention). And output. From the above, the converter 21 converts the input 100V AC signal to 12V.

  The high-frequency oscillation circuit 22 includes an oscillator such as crystal or ceramic, an amplifier circuit, and the like. Part of the output of the amplifier circuit is fed back to the input of the amplifier circuit. At this time, the output of the amplifier circuit returned to the input by feedback and the original input signal (12V AC signal) to the amplifier circuit are in phase, so that the input signal oscillates. The oscillation frequency is determined by the mounted oscillator. The high-frequency oscillation circuit 22 is not limited to the configuration described above, and other known oscillation circuits (for example, an oscillation circuit using a resistor and a capacitor) may be used. As described above, the high-frequency oscillation circuit 22 generates an AC signal having a preset frequency based on the AC signal converted into 12 V by the converter 21.

  The power transmission coil 23 is connected to the high-frequency oscillation circuit 22 via a power cord 26 (an example of the electric wire of the present invention, see FIGS. 1 and 2), and an AC signal generated by the high-frequency oscillation circuit 22 is input. . That is, an alternating current flows through the power transmission coil 23. The current flowing through the power transmission coil 23 varies according to the frequency of the AC signal. A magnetic field is generated in the power transmission coil 23 due to the fluctuation of the current.

  As shown in FIGS. 1, 2, and 3 (A), the converter 21 and the high-frequency oscillation circuit 22 are covered with a first housing 24. The first housing 24 is made of an insulating member such as synthetic resin. From the 1st housing | casing 24, the two blade parts 241 and 242 comprised with conductors, such as copper, protrude. The blade portions 241 and 242 are connected to the converter 21. When the blade portions 241 and 242 are inserted into an insertion port provided on an indoor wall or the like, an AC signal of 100 V is supplied from the commercial power supply 4 to the converter 21 through the insertion port. A power cord 26 connected to the high-frequency oscillation circuit 22 is provided from the inside of the first housing 24 to the outside. The power cord 26 is covered with an insulating member outside the first housing 24. This insulating member may be integrated with the insulating member constituting the first housing 24 or may be different from the insulating member constituting the first housing 24. When the insulating member that covers the power cord 26 and the insulating member that constitutes the first housing 24 are different, it is preferable that a waterproof seal or the like is affixed to the boundary portion between the both insulating members.

[Second casing 25]
As shown in FIGS. 2 and 3A, the power transmission coil 23 is covered with a second casing 25 (an example of the exterior member of the present invention). That is, the power feeding device 2 includes a second housing 25 that covers the power transmission coil 23. The second housing 25 is also composed of an insulating member, like the first housing 24.

  The second housing 25 has a flat plate shape. A power cord 26 connected to the power transmission coil 23 is provided from the inside of the second housing 25 to the outside. The power cord 26 comes out of the second housing 25 from one side surface 25 </ b> A of the second housing 25. As described above, one end of the power cord 26 is connected to the power transmission coil 23 and the other end to the high-frequency oscillation circuit 22, and is covered with an insulating member outside the second housing 25. The insulating member may be integrated with the insulating member constituting the second housing, or may be different from the insulating member constituting the second housing 25. Same as the case.

  As shown in FIG. 1, FIG. 2, FIG. 4 (A), FIG. 5 and FIG. 6, a cylindrical protrusion 251 (present invention) is formed on the side surface 25B opposite to the side surface 25A of the second housing 25. (An example of the convex portion) is provided. The protrusion 251 is configured to be larger than the diameter of the position away from the side surface 25B, that is, the diameter of the tip portion is close to the side surface 25B. The protrusion 251 is made of a material that can change its shape, such as rubber. The tip of the protrusion 251 having a larger diameter than the position close to the side surface 25B is an example of the holding member of the present invention, which will be described later.

[Mobile phone 3]
As shown in FIGS. 1 and 2, the mobile phone 3 has a vertically long shape in which the length in the vertical direction is longer than the length in the left-right direction and the length in the left-right direction is longer than the length in the front-back direction. The mobile phone 3 is provided with an operation panel on the front surface. The operation panel includes various operation buttons 341 and a liquid crystal display unit 342. The cellular phone 3 operates in response to an instruction input from the operation button 341 or the liquid crystal display unit 342 (when the liquid crystal display unit 342 is configured with a touch panel).

  As shown in FIG. 3B, the mobile phone 3 includes a power receiving coil 31 (an example of the power receiving coil of the present invention), a conversion circuit 32 (an example of the second signal conversion unit of the present invention), and a secondary battery 33. (An example of the secondary battery of the present invention).

  When an AC signal flows through the power transmission coil 23 in a state where the power reception coil 31 and the power transmission coil 23 are opposed to each other, an AC signal is transmitted to the power reception coil 31 from the power transmission coil 23 by electromagnetic induction. That is, when a magnetic field is generated in the power transmission coil 23 due to a change in the current flowing through the power transmission coil 23, the number of magnetic lines passing through the power transmission coil 23 varies. As a result, the number of lines of magnetic force penetrating the power receiving coil 31 disposed to face the power transmitting coil 23 varies. An alternating current flows through the power receiving coil 31 due to the fluctuation.

  The conversion circuit 32 includes a rectifier circuit (not shown) and a smoothing circuit (not shown). The rectifier circuit is a circuit composed of a rectifier element such as a diode, and converts an AC signal into a DC signal. The smoothing circuit is a circuit composed of a capacitor and a choke coil, and outputs a DC signal that has been smoothed by removing the pulsating component contained in the output voltage rectified by the rectifying circuit. As described above, the conversion circuit 32 generates a DC signal based on the AC signal output from the power receiving coil 31.

  The secondary battery 33 inputs and stores the DC signal generated by the conversion circuit 32. As the secondary battery 33, for example, a lithium ion battery is used.

[Telephone casing 35]
As shown in FIGS. 1, 2, and 3 (B), the power receiving coil 31, the conversion circuit 32, and the secondary battery 33 are covered with a telephone case 35. The power receiving coil 31 is covered by the phone casing 35 in the vicinity of the lower end in the vertical direction of the mobile phone 3 and in the vicinity of the center in the front-rear direction and the left-right direction. The secondary battery 33 is covered by the telephone casing 35 at the lower part in the vertical direction of the mobile phone 3 and at the rear part in the front-rear direction. For example, the conversion circuit 32 is covered by the telephone casing 35 at a position between the power reception coil 31 and the secondary battery 33.

  As shown in FIGS. 2 and 4, the telephone casing 35 is formed with a first recess 351 (an example of a fitted portion of the present invention) on the lower surface. The first recess 351 is provided at the lower end of the mobile phone 3 in the vertical direction. That is, the first recess 351 is provided adjacent to the power receiving coil 31.

  The first recess 351 is open at the front end. Moreover, the 1st recessed part 351 is a shape facing the 2nd housing | casing 25 of the electric power feeder 2, and is a substantially rectangular parallelepiped in this embodiment. Thereby, the 1st recessed part 351 is comprised so that the 2nd housing | casing 25 of the electric power feeder 2 can be inserted back from the front end. The first recess 351 is provided in the first range of the central portion in the left-right direction. The first range is a length that is the same as or slightly larger than the length in the left-right direction of the second housing 25 when the second housing 25 is ready to be inserted into the first recess 351. Further, the first recess 351 is provided in the second range from a little rear to the front end of the central portion in the front-rear direction. The second range is a length that is the same as or slightly larger than the length of the second casing 25 in the front-rear and front-rear direction when the second casing 25 is ready to be inserted into the first recess 351.

  As shown in FIGS. 2B and 4B, rails 353 (an example of an engagement member of the present invention) extending in the front-rear direction are formed on the left side surface and the right side surface of the first recess 351. Yes. On the other hand, as shown in FIGS. 2B, 4B, 5 and 6, rail grooves 252 extending in the front-rear direction are formed on the left side surface and the right side surface of the second housing 25. Yes. The groove width and depth of the rail groove 252 are formed such that the rail 353 can be inserted. As described above, the first recess 351 extends along the insertion direction of the second housing 25, and the both ends of the second housing 25 in the insertion direction of the second housing 25 are slidable in the insertion direction. The rail 353 engaged with the part is provided. A rail may be formed in the second housing 25 and a rail groove may be formed in the first recess 351.

  As shown in FIG. 2B, the first recess 351 has a protrusion 251 at a position facing the protrusion 251 of the second casing 25 when the second casing 25 is inserted into the first recess 351. The second concave portion 352 (an example of the concave portion of the present invention) having a shape opposite to the first concave portion is provided. The second recess 352 is configured such that the inner diameter at the deep position of the recess is larger than the inner diameter at the shallow position. The deep part of the 2nd recessed part 352 comprised by the large internal diameter is an example of the holding member of this invention. As described above, since the protrusion 251 is made of a material that can change its shape, even if the diameter of the tip of the protrusion 251 is larger than the inner diameter of the shallow position of the second recess 352, the protrusion 251 fits into the second recess 352. Is possible. Once the protrusion 251 and the second recess 352 are fitted, the fitted state is maintained unless the protrusion 251 and the second recess 352 are pulled out with a certain force.

  As described above, the second housing 25 includes the protrusion 251 that can be fitted to the second recess 352 in the insertion direction of the first recess 351. Further, the protrusion 251 is configured such that the diameter of the tip portion is larger than the diameter of the other portion in order to maintain the state of being fitted to the second recess 352. On the other hand, the first recess 351 is fitted to the second housing 25. Further, the first recess 351 includes a second recess 352 at a position facing the protrusion 251 provided in the second housing 25. Moreover, in order to hold | maintain the 2nd recessed part 352 with the processus | protrusion 251, the internal diameter of a deep position is comprised larger than the internal diameter of another part.

  In the above description, the case where the projection 251 is provided in the second casing 25 and the second recess 352 is provided in the first recess 351 has been described, but the second recess is provided in the second casing 25. Alternatively, the first recess 351 may have a protrusion.

  As described above, when the second casing 25 is inserted into the first recess 351, the second casing 25 of the power supply device 2 and the telephone casing 35 of the mobile phone 3 are shown in FIGS. 1 and 4. Positional relationship. As described above, since the power transmission coil 23 is covered with the second housing 25 and the power reception coil 31 is provided adjacent to the first recess 351 of the telephone housing 35, the power transmission coil 23 and the power reception coil 31 are The positional relationship is as shown in FIG. That is, the power transmission coil 23 and the power reception coil 31 face each other in a state where the second housing 25 and the first recess 351 are fitted.

[Switching unit 253]
As shown in FIG. 7, a switching unit 253 (an example of the switching unit of the present invention) may be provided inside the second housing 25. As shown in FIGS. 2A, 5, and 7, the switching portion 253 includes a sliding member 254 (an example of a movable portion of the present invention) such as a push button and a receiving member 255.

  The sliding member 254 is between the first posture shown in FIG. 7A and the second posture shown in FIG. 7B in the direction perpendicular to the upper surface of the second housing 25, that is, in the vertical direction. Slide. The sliding member 254 is held in the first posture by an elastic member such as a spring.

  The receiving member 255 is a conductive member such as a copper plate provided at a part of the wiring connecting the power transmission coil 23 and the high-frequency oscillation circuit 22 that is partially opened. The receiving member 255 changes its posture between a third posture shown in FIG. 7A for opening the wiring and a fourth posture shown in FIG. 7B for short-circuiting the wiring. The receiving member 255 is held in the third posture by an elastic member such as a spring. The receiving member 255 changes its posture from the third posture to the fourth posture by being pushed downward by the sliding member 254. In the present embodiment, as shown in FIG. 5, the receiving member 255 and the power transmission coil 23 are mounted on the printed board 257.

  As shown in FIG. 7A, when the second housing 25 is not inserted into the first recess 351, the sliding member 254 is held in the first posture, and the receiving member 255 is held in the third posture. Therefore, the wiring is open. On the other hand, as shown in FIG. 7B, when the second housing 25 is inserted into the first recess 351, the lower surface of the first recess 351 is in contact with the upper surface of the second housing 25. As a result, the sliding member 254 is pushed downward by the lower surface of the first recess 351 and changes its posture to the second posture. Then, the receiving member 255 is pushed downward by the sliding member 254 and changes its posture to the fourth posture. As a result, the wiring is short-circuited, and current flows through the converter 21, the high-frequency oscillation circuit 22, and the power transmission coil 23.

  As described above, the second casing 25 conducts an AC signal to the converter 21, the high-frequency oscillation circuit 22, and the power transmission coil 23 in a state where the second casing 25 and the first recess 351 are fitted, and the second casing 25 25 and the first recess 351 are provided with a switching unit 253 that cuts off the conduction of the AC signal to the converter 21, the high-frequency oscillation circuit 22, and the power transmission coil 23. The switching unit 253 is a mechanical switch that includes a sliding member 254 and switches on and off by the movement of the sliding member 254.

[Effect of the embodiment]
In the above-described embodiment, only the power transmission coil 23 is covered by the second housing 25, and the converter 21 and the high-frequency oscillation circuit 22 are connected to the power transmission coil 23 via the power cord 26. The second housing 25 is fitted into a first recess 351 provided in the mobile phone 3. Therefore, the connection between the power supply device 2 and the mobile phone 3 is less likely to be disconnected than when the mobile phone 3 is placed on the power supply device 2.

  Only the small second housing 25 covering only the power transmission coil 23 is attached to the mobile phone 3 during charging. In other words, during charging, the mobile phone 3 mounted with the second housing 25 and the power feeding device 2 other than the power transmission coil 23 are connected via the power cord 26. This facilitates handling such as movement of the mobile phone 3 during charging.

  In addition, since the power transmission coil 23 and the power reception coil 31 face each other in a state where the second housing 25 and the first recess 351 are fitted, power transmission from the power transmission coil 23 to the power reception coil 31 is possible by electromagnetic induction.

  In the above-described embodiment, the second housing 25 can be inserted into the first recess 351 while being engaged with the first recess 351 by the rail 353. Therefore, the connection of the second housing 25 to the mobile phone 3 is easy.

  Further, in the above-described embodiment, the diameter of the tip portion of the protrusion 251 is configured to be larger than the diameter of the other portion, and the second recess 352 has a shape facing the protrusion 251. Therefore, when the second housing 25 and the first recess 351 are fitted, the state is maintained. Therefore, the connection between the power supply device 2 and the mobile phone 3 is difficult to disconnect.

  In the above-described embodiment, when the power feeding device 2 and the mobile phone 3 are not connected, the switching unit 253 blocks the conduction of the AC signal to the converter 21, the high-frequency oscillation circuit 22, and the power transmission coil 23. The Therefore, it is possible to prevent wasteful power from being consumed by power transmission from a commercial power source or the like to the power feeding device 2 until the mobile phone 3 is not connected to the power feeding device 2.

[Modification 1 of Embodiment]
In the above-described embodiment, the second casing 25 is inserted into the first recess 351 by sliding the first recess 351 provided on the lower surface of the phone casing 35 of the mobile phone 3, and thereby the power transmission coil 23. A case where the power receiving coil 31 and the power receiving coil 31 face each other has been described. However, if the power transmission coil 23 and the power reception coil 31 face each other when the second casing 25 is fitted to the telephone casing 35, the second casing 25 is fitted to the telephone casing 35. Is not limited to those described above.

  For example, as shown in FIG. 8, three cylindrical protrusions 256 (an example of at least one convex portion of the present invention) are provided on the upper surface of the second housing 25, and the lower surface of the telephone housing 35. Instead of the first recess 351, three third recesses 354 (an example of at least one recess of the present invention) may be provided. Note that the number of the protrusions 256 and the third recesses 354 is not limited to three, and may be one, two, or four or more. The third recess 354 may be an opening.

  The protrusion 256 and the third recess 354 are provided at positions facing each other. Further, the protrusion 256 and the third recess 354 have shapes facing each other. The power receiving coil 31 is provided adjacent to the lower surface of the telephone housing 35 where the third recess 354 is provided. Further, like the protrusion 251 and the second recess 352 in the above-described embodiment, the diameter of the tip portion of the protrusion 256 (an example of the holding member of the present invention) is configured to be larger than the diameter of the other portion. The inner diameter at the deep position of the recess 354 is configured to be larger than the inner diameter at the shallow position. The deep part of the 3rd recessed part 354 comprised by the large internal diameter is an example of the holding member of this invention.

  That is, the protrusion 256 and the third recess 354 can be fitted, and the second casing 25 and the telephone casing 35 are fitted by fitting the projection 256 and the third recess 354 (FIG. 8A). reference). Then, when the second casing 25 and the telephone casing 35 are fitted, the power transmitting coil 23 and the power receiving coil 31 face each other. In addition, the diameter of the tip portion of the protrusion 256 is configured to be larger than the diameter of the other portion, and the third recessed portion 354 has a shape facing the protrusion 256, so that the protrusion 256 and the third recessed portion 354 are fitted to each other. The combined state is maintained.

  The second housing 25 may be provided with a third recess, and the telephone housing 35 may be provided with a protrusion. When two or more protrusions 256 and third recesses 354 are provided, both the protrusions and the third recesses may be provided in each of the second casing 25 and the telephone casing 35. In this case, a third recess is provided at a position facing the protrusion, and a protrusion is provided at a position facing the third recess.

  As described above, in the first modification, the second housing 25 includes at least one protrusion and / or a third recess that can be fitted to each other, and the fitted portion of the present invention is the second housing 25. And / or a third recess provided in a position facing the protrusion provided on the second housing 25 and / or a protrusion provided in a position facing the third recess provided in the second housing 25. Further, in the case of the first modification, when the second housing 25 and the telephone housing 35 are fitted, the state in which the protrusion 256 and the third recess 354 are fitted to each other is maintained, so that the second The state where the housing 25 and the telephone housing 35 are fitted is maintained. Therefore, the connection between the power supply device 2 and the mobile phone 3 is difficult to disconnect.

[Modification 2 of the embodiment]
As shown in FIG. 9, in Modification 1, the telephone casing 35 is provided with a circular groove 355 instead of the third recess 354, and all the protrusions 256 provided on the second casing 25 are It may be provided at a position facing any position of the groove 355. In this case, the groove 355 is configured such that the circular width d at a deep position is larger than the circular width d at a shallow position. The protrusion 256 is the same as that in the first modification. With such a configuration, the second casing 25 can be rotated in a state where the second casing 25 is fitted to the telephone casing 35. As a result, the second casing 25 and the power cable 26 connecting the second casing 25 and the first casing 24 can be directed in a desired direction.

[Modification 3 of the embodiment]
In the above-described embodiment, the case where the switching unit 253 is a mechanical switch has been described. However, the switching unit 253 may be an electronic switch. For example, a circuit including an electromagnet that generates a magnetic field when an electric current flows (an example of a circuit unit of the present invention, not shown) is disposed near the lower surface of the telephone housing 35. A receiving member (not shown) is disposed in the second housing 25. By detecting the magnetic field, the receiving member is changed in posture from a posture of opening the wiring connecting the high-frequency oscillation circuit 22 and the power transmission coil 23 to a posture of short-circuiting. The receiving member is disposed so as to be in the vicinity of the electromagnet when the second housing 25 is inserted into the first recess 351. Thereby, when the 2nd housing | casing 25 is inserted in the 1st recessed part 351, a receiving member detects the magnetic field by an electromagnet. By detecting the magnetic field, the receiving member changes its posture from a posture of opening the wiring to a posture of short-circuiting. As described above, the switching unit 253 includes a circuit including an electromagnet, and switches on / off based on the current flowing through the circuit.

  The electronic switch is not limited to switching on and off by a magnetic field, and may be one that switches on and off by an electric field or light. Further, the electronic switch is not limited to being switched on / off by current flow, but may be switched on / off by voltage application.

  According to this configuration, it is possible to avoid the switching unit 253 being exposed to the surface of the second housing 25 by configuring the switching unit 253 with an electronic switch. This is preferable when the mobile phone 3 is charged in water.

DESCRIPTION OF SYMBOLS 1 ... Charging equipment 2 ... Power feeding device 3 ... Mobile phone 21 ... Converter 22 ... High frequency oscillation circuit 23 ... Power transmission coil 25 ... Second housing 31 ... Power reception coil 32 ... Conversion circuit 33 ... Secondary battery 251 ... Projection 253 ... Switching portion 254 ... Sliding member 351 ... First recess 352 ... Second recess 353 ... Rail

Claims (7)

A power supply device;
An electronic device including a power-supplied device to which power is supplied from the power supply device,
The power supply device
A first signal converter that converts the input AC signal of the first voltage into a second voltage;
A signal generator for generating an AC signal having a preset frequency based on the AC signal converted into the second voltage in the first signal converter;
A power transmission coil connected to the signal generation unit via an electric wire, to which an AC signal generated by the signal generation unit is input;
An exterior member that covers the power transmission coil,
The powered device is
A power receiving coil through which an AC signal is transmitted from the power transmitting coil by electromagnetic induction;
A second signal converter that generates a DC signal based on the AC signal output from the power receiving coil;
A secondary battery for storing the DC signal generated by the second signal conversion unit;
Provided adjacent to the power receiving coil, and a fitted portion to be fitted to the exterior member,
An electronic device in which the power transmission coil and the power reception coil face each other in a state where the exterior member and the fitted portion are fitted. The mated part is
The exterior member is configured to be insertable,
An engagement member that extends along the insertion direction of the exterior member, and that engages with both ends of the exterior member in the insertion direction so as to be slidable in the insertion direction; The electronic device according to claim 1. The exterior member further includes one of a convex portion and a concave portion that can be fitted to each other in the insertion direction,
The fitted portion further includes the other of the convex portion and the concave portion at a position facing one of the convex portion and the concave portion provided in the exterior member,
The electronic device according to claim 2, wherein the convex portion and the concave portion include a holding member that holds a state of being fitted to each other. The exterior member includes at least one convex portion and / or a concave portion that can be fitted to each other,
The fitted portion is the recess provided in a position facing the projection provided in the exterior member and / or the position provided in a position facing the recess provided in the exterior member. Consists of convex parts,
The electronic device according to claim 1, wherein the convex portion and the concave portion include a holding member that holds a state of being fitted to each other.   The exterior member conducts an alternating current signal to the first signal conversion unit, the signal generation unit, and the power transmission coil in a state where the exterior member and the fitted portion are fitted, and the exterior member and the covered member. 5. The apparatus according to claim 1, further comprising: a switching unit that blocks conduction of an AC signal to the first signal conversion unit, the signal generation unit, and the power transmission coil in a state in which the fitting unit is unfitted. The electronic device in any one.   The electronic apparatus according to claim 5, wherein the switching unit is a mechanical switch that includes a movable unit and switches on and off by the movement of the movable unit.   The electronic apparatus according to claim 5, wherein the switching unit is an electronic switch that includes a circuit unit and switches on and off based on a voltage applied to the circuit unit or a current flowing in the circuit unit.

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