JP2008141940A - Battery charging cradle and mobile electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely and stably charge an incorporated battery by setting a mobile electronic device to an accurate position of a battery charging cradle while thinning the mobile electronic device. <P>SOLUTION: The battery charging cradle and the mobile electronic device are composed of the battery charging cradle 10 incorporating a primary coil 11 which induces an AC magnetic flux to a specific portion of a planar top plate 12, and the mobile electronic device 20 equipped with a battery 31 incorporated inside a back plate 22 and charged by electric power which is induced to a secondary coil 21 being electromagnetically coupled to the primary coil 11. The battery charging cradle 10 has a positioning projection 14 on the top plate 12, and the mobile electronic device 20 has a positioning recess 24 fitted into the positioning projection 14 on the back plate 22. The secondary coil 21 is a coreless planar coil, a hollow part 26 is provided in the center thereof, and the positioning recess 24 is provided in this hollow part 26. The positioning projection 14 of the battery charging cradle 10 is guided into the positioning recess 24 of the mobile electronic device 20, and the primary coil 11 and the secondary coil 21 are electromagnetically coupled to each other. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a charging base and a portable electronic device that place a portable electronic device on a charging base, transport electric power from the charging base to the portable electronic device by electromagnetic induction, and charge a battery built in the portable electronic device.

  2. Description of the Related Art A charging stand and a portable electronic device that charge electric power from a primary coil to a secondary coil by the action of electromagnetic induction have been developed. (See Patent Documents 1 and 2)

  Patent Document 1 describes a structure in which a primary coil that is excited by an AC power source is built in a charging stand, and a secondary coil that is electromagnetically coupled to the primary coil is built in a battery pack. Further, the battery pack includes a circuit for rectifying the alternating current induced in the secondary coil and supplying the battery to the battery for charging. According to this structure, the battery pack can be charged in a non-contact state by placing the battery pack on the charging stand.

Furthermore, Patent Document 2 has a structure in which a battery is built in the bottom of a portable electronic device, a secondary charging adapter is provided below the battery, and a secondary coil and a charging circuit are built in the secondary charging adapter. Is described. A structure in which a primary coil that is electromagnetically coupled to the secondary coil is provided on the charging stand is also described. A portable electronic device to which a secondary charging adapter is coupled is placed on a charging stand, and power is transferred from the primary coil to the secondary coil to charge the battery of the portable electronic device.
JP-A-9-63655 Utility model registration No. 3011829

  Patent Document 1 has a drawback that the battery pack cannot be charged if the position of the battery pack placed on the charging stand is shifted. This is because if the relative position between the portable electronic device and the charging stand is deviated, the primary coil and the secondary coil are not electromagnetically coupled, and AC power cannot be transferred from the primary coil to the secondary coil. As described in Patent Document 2, this drawback can be eliminated by providing a positioning convex portion on the charging stand and providing a positioning concave portion into which the positioning convex portion is inserted in the portable electronic device. This structure can prevent the relative displacement between the portable electronic device and the charging stand by guiding the positioning protrusion to the positioning recess.

  However, the structure shown in Patent Document 2 has a drawback in that a positioning concave portion is provided on the bottom surface of the case and the secondary coil is disposed on the positioning concave portion, so that the secondary charging adapter portion cannot be thinned. Since portable electronic devices such as cellular phones are required to be as thin as possible, there is a disadvantage that it becomes inconvenient to carry when the thickness is increased by the positioning recess.

  The present invention has been developed for the purpose of solving this drawback. An important object of the present invention is to provide a charging base and a portable electronic device capable of reliably and stably charging a built-in battery by setting the portable electronic device at an accurate position of the charging base while making the portable electronic device thin. There is to do.

  The charging stand and the portable electronic device according to claim 1 of the present invention include a charging stand 10 and 70 having a built-in primary coil 11 connected to an AC power supply 15, and an electromagnetic force on the primary coil 11 of the charging stand 10 and 70. The portable electronic device 20 includes a secondary coil 21 to be coupled and a rechargeable battery 31 that is charged with electric power induced in the secondary coil 21. The charging bases 10 and 70 have planar upper surface plates 12 and 72 on which the portable electronic devices 20 and 60 are detachably mounted on the upper surface, and 1 so as to induce an alternating magnetic flux to a specific portion of the upper surface plates 12 and 72. A secondary coil 11 is incorporated. The portable electronic devices 20 and 60 have flat back plates 22 and 62 that are placed on the top plates 12 and 72 of the charging bases 10 and 70, and the secondary coil 21 is disposed inside the back plates 22 and 62. ing. Further, the charging bases 10 and 70 have positioning convex portions 14 and 74 on the upper surface plates 12 and 72, and the portable electronic devices 20 and 60 are positioned concave portions 24 and 64 fitted into the positioning convex portions 14 and 74. Are provided on the back plates 22 and 72. The secondary coil 21 is an air-core planar coil in which a wire is wound spirally around a plane. The secondary coil 21 of the planar coil is disposed inside the back plates 22 and 62 in a posture parallel to the back plates 22 and 62. The planar coil that is the secondary coil 21 has a center winding diameter larger than the inner diameter of the positioning recesses 24 and 64, and a hollow portion 26 is provided at the center of the planar coil, and the positioning recess 24, 64 is provided. The positioning protrusions 14 and 74 of the charging bases 10 and 70 are guided to the positioning recesses 24 and 64 of the portable electronic devices 20 and 60, and the primary coil 11 and the secondary coil 21 are electromagnetically coupled. AC power is supplied to the secondary coil 21 to charge the batteries 31 of the portable electronic devices 20 and 60.

  In the charging stand and portable electronic device according to claim 2 of the present invention, in addition to the configuration of claim 1, charging bases 10 and 70 have the entire surface of upper surface plates 12 and 72 planar.

  The charging base and the portable electronic device according to claim 3 of the present invention include charging bases 50, 70, 90 having a secondary coil 21 connected to the AC power source 15, and a primary of the charging bases 50, 70, 90. The portable electronic device 20, 60, and 80 includes a secondary coil 21 that is electromagnetically coupled to the coil 11, and a rechargeable battery 31 that is charged with electric power induced in the secondary coil 21. The charging base 50, 70, 90 has a planar upper surface plate 52, 72, 92 on which the portable electronic device 20, 60, 80 is detachably mounted on the upper surface, and a specific portion of the upper surface plate 12, 72, 92 A primary coil 11 is incorporated so as to induce an alternating magnetic flux. The portable electronic devices 20, 60, and 80 have planar back plates 22, 62, and 82 that are placed on the top plates 52, 72, and 92 of the charging bases 50, 70, and 90, and the back plates 22, 62, and 82 A secondary coil 21 is disposed on the inner side. Further, the charging bases 50, 70, and 90 display the set positions indicating the positions where the portable electronic devices 20, 60, and 80 are placed on the top plates 52, 72, and 92 as graphics 59, 79, and 99. In the charging bases 50, 70, 90, the portable electronic devices 20, 60, 80 are placed on the top plates 52, 72, 92 in accordance with the set positions, and the primary coil 11 and the secondary coil 21 are electromagnetically coupled. Then, AC power is supplied from the primary coil 11 to the secondary coil 21 to charge the batteries 31 of the portable electronic devices 20, 60, and 80.

  The charging stand and portable electronic device according to claim 4 of the present invention are electromagnetically coupled to the charging stand 10 including the secondary coil 21 connected to the AC power source 15 and the primary coil 11 of the charging stand 10. The portable electronic device 20 includes a secondary coil 21 and a rechargeable battery 31 that is charged with electric power induced in the secondary coil 21. The charging stand 10 has a flat upper surface plate 12 on which the portable electronic device 20 is detachably mounted, and has a built-in primary coil 11 so as to induce an alternating magnetic flux in a specific portion of the upper surface plate 12. . The portable electronic device 20 has a flat back plate 22 placed on the top plate 12 of the charging stand 10, and a secondary coil 21 is disposed inside the back plate 22. Furthermore, the charging stand 10 includes a position sensor 16 that detects the set position of the portable electronic device 20. The charging stand 10 detects and displays the position where the position sensor 16 places the portable electronic device 20.

  The charging stand and the portable electronic device according to claim 5 of the present invention detect a position where the position sensor 16 places the portable electronic device 20 and when the position where the portable electronic device 20 is placed deviates from the set position, issues a displacement error alarm. Further, the charging stand and the portable electronic device according to claim 6 of the present invention detect the position where the position sensor 16 places the portable electronic device 20 and display a normal display when the position where the portable electronic device 20 is placed is in the set position.

  The charging base 10 and the portable electronic device 20 according to the seventh aspect of the present invention include, in addition to the configuration of the fourth aspect, a current flowing through the primary coil 11 by the position sensor 16, a power consumption of the primary coil 11, and a primary coil. 11 is detected, and the position of the portable electronic device 20 is detected.

  The present invention has a feature that a portable electronic device can be set at an accurate position on a charging stand while the portable electronic device is thin, and a built-in battery can be reliably and stably charged. In particular, the portable electronic device according to claim 1 has a built-in secondary coil as an air-core planar coil, which is arranged in parallel to the inner side of the back plate, and further, the winding diameter at the center of the planar coil is set to the inner diameter of the positioning recess. The hollow portion is provided in the center of the planar coil, and the positioning recess is disposed in the hollow portion. With this unique structure, the portable electronic device arranges the secondary coil and the positioning recess on the same plane. Therefore, the back surface of the portable electronic device is made thin while having a structure in which the planar coil is incorporated and the portable electronic device is guided to the positioning convex portion of the charging stand and set at a fixed position.

  Moreover, the charging stand of Claim 3 of this invention has displayed the set position which shows the position which mounts a portable electronic device on a top plate with a figure. The user of the portable electronic device can charge the battery stably by setting the portable electronic device in accordance with the set position displayed in the figure on the upper surface plate, and securely coupling the primary coil and the secondary coil electromagnetically. .

  Furthermore, the charging stand according to claim 4 of the present invention has a built-in position sensor for detecting the set position of the portable electronic device, and this position sensor detects the position where the portable electronic device is placed. In particular, the charging stand according to claim 5 of the present invention issues a positional deviation alarm when the position on which the portable electronic device is placed deviates from the set position. Therefore, the user can stably charge the built-in battery by setting the portable electronic device so that there is no misalignment alarm and reliably electromagnetically coupling the primary coil and the secondary coil. Moreover, since the charging stand of Claim 6 of this invention displays normally when the position which mounts a portable electronic device exists in a set position, a user sets a portable electronic device in an exact position, confirming a normal display. The primary coil and the secondary coil can be reliably electromagnetically coupled to stably charge the built-in battery.

  Embodiments of the present invention will be described below with reference to the drawings. However, the embodiment described below exemplifies a charging stand and a portable electronic device for embodying the technical idea of the present invention, and the present invention does not specify the charging stand and the portable electronic device as follows. .

  Further, in this specification, in order to facilitate understanding of the scope of claims, numbers corresponding to the members shown in the examples are indicated in the “claims” and “means for solving problems” sections. It is added to the members. However, the members shown in the claims are not limited to the members in the embodiments.

  1 to 6 show a charging base 10 and a portable electronic device 20 that charges a battery 31 built on the charging base 10. The charging stand 10 incorporates a primary coil 11 connected to an AC power supply 15. The charging stand 10 is provided with a planar upper surface plate 12 on which the portable electronic device 20 is detachably mounted. The charging base 10 shown in the figure has a flat top plate 12 as a whole and is disposed horizontally. The charging stand 10 can charge a built-in battery 31 by placing various portable electronic devices 20 having different sizes and outer shapes on top. However, the charging stand can be provided with a peripheral wall around it, and a portable electronic device can be set inside the peripheral wall to charge the built-in battery. The charging base can be mounted with various portable electronic devices by making the peripheral wall larger than the outer shape of the largest portable electronic device that can be placed on the top plate.

  The charging stand 10 has a primary coil 11 disposed on the inner surface of the upper plate 12. The primary coil 11 is wound in a spiral shape on a surface parallel to the upper surface plate 12, and induces an alternating magnetic flux in a specific portion of the upper surface plate 12. The primary coil 11 induces an alternating magnetic flux orthogonal to the top plate 12 to a specific portion. The primary coil 11 is supplied with AC power from the AC power supply 15 and induces an AC magnetic flux in a specific portion of the top plate 12, that is, a specific portion above the primary coil 11. The primary coil 11 built in the charging stand 10 does not need to be as thin as the secondary coil 21. For this reason, the primary coil 11 has a wire rod wound around a core 13 made of a magnetic material. The core 13 is made of a magnetic material such as ferrite having a high magnetic permeability, and has a bowl shape that opens upward. The bowl-shaped core 13 has a shape in which a columnar portion 13A arranged at the center of the primary coil 11 wound in a spiral shape and a cylindrical portion 13B arranged outside are connected at the bottom. The primary coil 11 having the core 13 can concentrate the magnetic flux on a specific portion of the top plate 12 and efficiently transmit power to the secondary coil 21. However, the primary coil is not necessarily provided with a core, and may be an air-core coil.

  The charging stand 10 is provided with a positioning projection 14 protruding upward on the top plate 12. The positioning convex portion 14 is provided to set the portable electronic device 20 at a specific position on the top plate 12. That is, the positioning convex portion 14 is guided to the positioning concave portion 24 of the portable electronic device 20 so that the portable electronic device 20 is set at a fixed position on the top plate 12. The positioning convex portion 14 is provided at the center of the primary coil 11. The charging stand 10 is provided with a positioning convex portion 14 at the center of a specific portion where the primary coil 11 induces an alternating magnetic flux. This is because the specific portion of the top plate 12 where the primary coil 11 induces an alternating magnetic flux is above the primary coil 11. The positioning convex part 14 is cylindrical. The positioning convex portion 14 is guided by the positioning concave portion 24 of the portable electronic device 20 and can rotate the portable electronic device 20 around the positioning convex portion 14. With this structure, the portable electronic device 20 can be freely rotated in a horizontal plane while the portable electronic device 20 is set on a specific portion of the top plate 12. Even when the portable electronic device 20 is rotated around the positioning convex portion 14, the primary coil 11 and the secondary coil 21 are maintained in an electromagnetically coupled state. This is because the secondary coil 21 of the portable electronic device 20 is arranged at a specific portion. The charging stand 10 having this structure can reliably charge the battery 31 by setting the portable electronic device 20 on the top plate 12 of the charging stand 10 in a free posture. The structure in which the portable electronic device 20 can be set and rotated freely in a specific portion can be realized even if the positioning recess is a cylindrical shape. That is, either or both of the positioning convex portion 14 and the positioning concave portion 24 can be realized as a cylindrical shape.

  The AC power supply 15 connected to the primary coil 11 supplies, for example, high frequency power of 20 kHz to 1 MHz to the primary coil 11. The AC power supply 15 has a built-in position sensor 16 that detects the set position of the portable electronic device 20. The position sensor 16 detects a position where the portable electronic device 20 is placed on the top plate 12. When the position on which the portable electronic device 20 is placed deviates from the normal set position, a misalignment alarm is issued. The position sensor 16 detects either the current flowing through the primary coil 11, the power consumption of the primary coil 11, the resonance frequency of the primary coil 11, or the impedance of the primary coil 11, and determines the position of the portable electronic device 20. To detect. This is because the current flowing through the primary coil 11, the power consumption of the primary coil 11, the resonance frequency of the primary coil 11, and the impedance of the primary coil 11 change when the portable electronic device 20 deviates from the normal set position. FIG. 7 shows the characteristic that the power consumption of the primary coil 11 changes depending on the position of the portable electronic device 20. As shown in this figure, when the primary coil 11 and the secondary coil 21 are electromagnetically coupled in an ideal state, the power consumption of the primary coil 11 is maximized and the primary coil 11 to the secondary coil 21. Can efficiently transport power. However, when the portable electronic device 20 is deviated from the normal set position, the electromagnetic coupling between the primary coil 11 and the secondary coil 21 becomes small, the equivalent impedance of the primary coil 11 changes, and the power consumption is reduced. Therefore, when the power consumption of the primary coil 11 becomes smaller than the set value (P0), the position sensor 16 issues a misalignment alarm and prompts the portable electronic device 20 to be corrected to the set position. The charging stand 10 provided with both the positioning convex part 14 and the position sensor 16 can set the portable electronic device 20 to the specific part of the charging stand 10 more reliably. However, the charging stand may be provided with either a positioning convex portion or a position sensor so that the portable electronic device can be set on a specific portion of the charging stand.

  Since the impedance of the primary coil 11 changes depending on the position of the portable electronic device 20, the current value and the resonance frequency also change. Therefore, the position sensor 16 can also detect the position of the portable electronic device 20 from the current of the primary coil 11 and the resonance frequency. The position sensor 16 that determines the position of the portable electronic device 20 from the resonance frequency of the primary coil 11 changes the frequency of the high frequency supplied to the primary coil 11 and detects the resonance frequency from the change in current with respect to the frequency. This is because the current of the primary coil 11 exhibits a peak value at the resonance frequency. The position sensor 16 stores a resonance frequency band in a state in which the portable electronic device 20 is disposed at a normal set position. When the resonance frequency is deviated from this resonance frequency region, the portable electronic device 20 is brought to a normal set position. It is determined that it is not set, and a positional deviation alarm is issued.

  The position sensor 16 turns on the light emitting diode 17, changes the color of the light emitting diode 17 to be turned on, or changes the blinking state to give a positional deviation alarm with light, or sound generated from the speaker 18. A misalignment alarm is issued at. For example, the light emitting diode 17 can change the emission color and the blinking state depending on the degree of displacement, and the speaker 18 can change the volume and type of the sound depending on the degree of displacement.

  Further, the position sensor 16 can detect a position where the portable electronic device 20 is placed, and can perform normal display when the position where the portable electronic device 20 is placed is in the set position. In the normal display, the light emitting diode 17 is turned on, the color of the light emitting diode 17 to be turned on is changed, or the blinking state is changed to display with light, or the sound generated from the speaker 18 is displayed.

  As shown in FIGS. 1 and 2, instead of individually arranging the light emitting diodes 17 on the outside, a plurality of light emitting diodes are arranged on the inside of the top plate 12, and viewed from the outside, the top plate You may make it the substantially 12 or the outer peripheral side of 12 shine. For the top plate 12, a resin material can be used. In this case, a light-transmitting material is used. Moreover, a translucent material can also be employ | adopted for the part which needs to permeate | transmit the light of a light emitting diode in an upper surface plate.

  Furthermore, the position sensor can determine whether or not it is in the set position by a signal from the portable electronic device. This portable electronic device detects whether or not the electric power induced in the secondary coil is larger than a set value, determines whether or not it is in the set position of the charging stand, and sends the position signal to the secondary coil and the primary coil. To the position sensor. This portable electronic device modulates a carrier wave with a position signal and transmits the carrier wave from the secondary coil to the primary coil, and the position sensor demodulates the carrier wave induced in the primary coil to detect the position signal.

  As shown in FIG. 8, the charging stand 10 is a position where the portable electronic device 20 is placed on the upper surface plate 52, regardless of the combination of the positioning protrusion 14 and the positioning recess 24, the position sensor 16, or a combination thereof. Can be displayed as a graphic 59, and the portable electronic device 20 can be placed at a normal set position. The charging stand 50 in the figure prints a graphic 59 showing the outer shape of the mobile electronic device 20 and displays the set position. The charging stand 50 that prints and displays the outer shape of the portable electronic device 20 as the set position can be set at the normal set position by setting the portable electronic device 20 according to the outer shape of the set position 59. Furthermore, the charging stand 50 shown in the figure has printed on the upper surface plate 52 a figure 59 indicating a set position of a plurality of types of portable electronic devices. The plurality of figures 59 are displayed corresponding to the outer shape of a plurality of types of portable electronic devices, for example. The charging stand 50 has a feature that it can be set at an accurate position even if it is a portable electronic device of a different model.

  Furthermore, the graphic to be printed on the upper plate of the charging stand does not necessarily have to be the outer shape of the portable electronic device to be set, and can be various patterns that allow the portable electronic device to be arranged at an accurate set position. The charging stand 70 shown in FIG. 9 to FIG. 15 displays on the upper surface of the upper plate 72 a circle, a rectangle, or a part thereof, or a combination of straight lines, dots, triangles, etc. as a graphic 79. Further, the charging stand 70 shown in these drawings is provided with a positioning projection 74 protruding from the center of the upper surface plate 72. Therefore, these charging stands 70 set the portable electronic device at the set position of the upper surface plate 72 by both the positioning convex portion 74 and the graphic 79 displayed on the upper surface plate 72. However, the charging stand can set the portable electronic device at the set position only by a figure indicating the set position of the portable electronic device displayed on the upper surface plate without providing the positioning convex portion on the upper surface plate.

  The charging stand 70 shown in FIGS. 9 to 11 displays a plurality of concentric circles around the positioning convex portion 74 on the upper surface of the upper surface plate 72. In addition to the two concentric circles, the graphic 79A in FIG. 9 displays the axes intersecting vertically and horizontally with the positioning convex portion 74 as the center by dots. Further, the figure 79B shown in FIG. 10 has a pattern in which five concentric arcs are arranged at equal intervals in the vertical direction of the upper surface plate 74 (vertical direction in the figure). Furthermore, in the figure 79C shown in FIG. 11, three concentric circles are partially cut and indicated by chain lines.

  The charging stand 70 shown in FIGS. 12 and 13 displays a plurality of rectangles along the outer peripheral edge of the upper surface plate 72 on the outer peripheral portion of the upper surface of the upper surface plate 72. The plurality of rectangles are rectangles having different sizes with the positioning convex portion 74 as an intersection of diagonal lines, and these are displayed at equal intervals. A graphic 70D shown in FIG. 12 displays three rectangles on the outer peripheral portion of the top plate 72, and displays triangles in four directions around the central positioning convex portion 74 to guide the position of the positioning convex portion 74. Yes. A graphic 79E shown in FIG. 13 displays three rectangles on the outer periphery of the top plate 72, and each rectangle is divided into two in the vertical direction at the top and bottom centers in the figure, on both sides of the top plate 72. It is arranged.

  Furthermore, the figure 79F of the charging stand 70 in FIG. 14 displays an axis that intersects through the vertical and horizontal centers of the upper surface plate 72, and displays innumerable dots on the entire surface of the upper surface plate 72. The innumerable dots are displayed at equal intervals at the intersections of the grid with the vertical and horizontal axes as the xy axes. Furthermore, the figure 79G of the charging stand 70 in FIG. 15 displays a plurality of axes passing through the vertical and horizontal central portions at equal intervals, and at the central portion, a plurality of concentric circles centering on the positioning convex portions 74 are equally spaced. These axes and concentric arcs are connected to each other.

  As shown in FIGS. 9 to 11, the graphic 79 displaying a plurality of concentric circles can recognize the center of the concentric circles as the position of the positioning convex portion 74, and as shown in FIGS. 9, 14, and 15, The figure 79 displaying the axis intersecting through the vertical and horizontal centers of the top plate 72 can recognize the intersection of the axes as the positioning convex part 74. Furthermore, as shown in FIG. 12 and FIG. 13, a figure 79 displaying a plurality of rectangles along the outer periphery of the top plate 72 can be positioned by positioning the outer periphery of the portable electronic device along the rectangle, A figure 79 that displays innumerable dots at equal intervals on the entire surface of the upper plate 72 can recognize the position and orientation of the portable electronic device based on the number and symmetry of the dots visible on the outer periphery of the portable electronic device. However, the graphic displayed on the upper surface plate is not limited to the above-described pattern, and can be any other pattern that allows the portable electronic device to be placed at an accurate set position.

  As described above, the charging stand 70 displaying the graphic 79 indicating the setting position of the portable electronic device on the upper surface plate 72 is provided with the positioning projection 74 provided on the upper surface plate 72 when the portable electronic device is set. There is a feature that can be set while estimating the position. When the portable electronic device is set on the charging stand, the positioning protrusion becomes a blind spot of the portable electronic device to be set, and the accurate position cannot be visually recognized. For this reason, it becomes difficult to quickly engage the positioning concave portion of the portable electronic device with the positioning convex portion of the upper surface plate. However, since the charging stand 70 having the above-described graphic 79 can estimate the position of the positioning convex portion 74 by the pattern, the positioning concave portion of the portable electronic device is quickly fitted to the positioning convex portion 74 of the upper surface plate 72 and set. Features that can be realized.

  Furthermore, the portable electronic device 60 shown in FIG. 16 has a positioning recess 64 at the center of the back surface. In this portable electronic device 60, the positioning coil 64 is positioned at the center of the back surface. In other words, the secondary coil 21 is placed on the back plate 62 so that the incorporated secondary coil 21 is positioned at the center of the back surface. It is arranged inside a certain back cover 63. Moreover, the charging stand 70 shown in this figure is provided with a positioning convex portion 74 at the center of the upper surface plate 72. As described above, the structure in which the positioning convex portion 74 is provided at the center of the upper surface plate 72 of the charging base 70 and the positioning concave portion 64 is provided at the center of the back plate 62 of the portable electronic device 60 has the structure in which the portable electronic device 60 is connected to the charging base 70. With the set position set, the center of the portable electronic device 60 is set to be the center of the upper surface plate 72 of the charging stand 70 regardless of the vertical and horizontal orientations and the rotation directions of the portable electronic device 60. The secondary coil 11 and the secondary coil 21 can be ideally electromagnetically coupled.

  However, as shown in FIG. 17, the charging stand can display only the graphic 99 indicating the set position of the portable electronic device 80 without providing the positioning protrusion on the upper surface plate 92. The charging stand 90 also uses the figure 99 displayed on the upper surface plate 92 as the pattern shown in FIGS. 9 to 15 to estimate the position of the primary coil 11 built in the upper surface plate 92 and Can be set at the set position. Further, the charging stand 90 and the portable electronic device 80 of FIG. 17 are also arranged around the primary coil 11 and the secondary coil 21. That is, the charging stand 90 incorporates the primary coil 11 inside the center portion of the top plate 92, and the portable electronic device 80 incorporates the secondary coil 21 in the center portion on the back surface. The charging base 90 and the mobile electronic device 80 having this structure are also positioned so that the center of the mobile electronic device 80 is positioned at the center of the upper surface plate 72 of the charging base 90 regardless of the vertical and horizontal orientations and rotation directions of the mobile electronic device 80. By setting, the primary coil 11 and the secondary coil 21 can be ideally electromagnetically coupled.

  However, the graphic indicating the set position is not necessarily printed, and the graphic indicating the set position of the portable electronic device can be displayed as a set of lines and point light sources using a light source such as a light emitting diode. The graphic display of the set position is displayed at a position where the portable electronic device is set here, the primary coil and the secondary coil are efficiently electromagnetically coupled, and the battery can be charged.

  The portable electronic device 20 incorporates a secondary coil 21 that is electromagnetically coupled to the primary coil 11 of the charging stand 10 and a battery 31 that is charged with electric power induced in the secondary coil 21. The portable electronic device 20 shown in FIGS. 3 and 4 has a secondary battery 21 and a battery 31 built in a battery pack 30. The portable electronic device 20 has a back cover 23 as a back plate 22 and a positioning recess 24 in the back plate 22 of the back cover 23. The back plate 22 of the back cover 23 is provided with a positioning recess 24 and an inner protrusion 25 is provided on the inner surface at this position. The inner protruding portion 25 is disposed in the hollow portion 26 of the battery pack 30. Therefore, the battery pack 30 is provided with a hollow portion 26 that guides the inner protrusion 25 provided on the back plate 22 of the back cover 23. However, the portable electronic device of the present invention is not specified as a structure in which the secondary coil and the battery are built in the battery pack. The portable electronic device can be built in a structure in which the secondary coil and the battery cannot be detached from the case, or can be built in a battery pack in which only the battery can be detached, and can be built in the structure in which the secondary coil cannot be detached from the case. A portable electronic device with a secondary coil built in the case and a battery pack that can be attached to and detached from the battery pack is guided to the secondary coil by connecting the secondary coil and the battery pack with a contact (not shown). Charge the battery with electricity.

  4 and 5 includes a secondary battery 31 that is a thin battery, a circuit board 32, and a cover case 33 that covers the circuit board 32 and is disposed at a fixed position. Further, in the battery pack shown in the figure, the secondary coil 21 and the spacer 35 are arranged on the surface of the secondary battery 31 which is a thin battery, and a plastic film 36 is attached to the outside of the whole so that they are in place. keeping.

  The battery 31 is a lithium ion battery or a polymer battery. The polymer battery is a lithium polymer battery. However, the battery can be any rechargeable battery such as a nickel metal hydride battery or a nickel cadmium battery. Further, the battery is a thin battery having a width wider than the thickness, and two opposing surfaces are a first flat surface 31a and a second flat surface 31b. The first flat surface 31a and the second flat surface 31b are quadrangular.

  The circuit board 32 mounts a protection circuit (not shown) for the battery 31. The protection circuit is a circuit that protects the battery 31 from overcurrent, or a circuit that prevents the battery 31 from being overcharged or overdischarged. In the battery pack of FIG. 5, the circuit board 32 is connected to the positive and negative electrodes of the battery 31 via lead plates 42 and 43. The battery pack shown in the figure has one connection lead as a protection element 41 and is connected to a convex electrode provided on the electrode terminal surface of the battery 31 via a lead plate 42, and the other connection lead as a lead plate 43. The battery 31 is connected to a planar electrode provided on the electrode terminal surface. In the illustrated battery pack, one connection lead is used as the protection element 41, but both connection leads can be used as lead plates. However, the battery pack can be mounted on a circuit board with a protective element such as a PTC or a thermal fuse, and the circuit board can be connected to the battery with a lead plate or the like. In addition, the battery pack can be connected to the battery by using a thermal fuse instead of the PTC as a protection element and using one connection lead as a thermal fuse.

  The circuit board 32 is disposed at a fixed position with the cover case 33 being connected to the battery 31 via the lead plates 42 and 43. However, although not shown, the battery pack may be provided with a substrate holder between the thin battery and the circuit board, and the circuit board may be held in a fixed position via the board holder. The circuit board 32 has an output terminal 44 fixed to the surface. The output terminal 44 is exposed to the outside from an electrode window 45 provided in the cover case 33. The cover case 33 is formed by molding an insulating material such as plastic, and is connected to a battery end surface on which the circuit board 32 is disposed.

  The secondary coil 21 is a planar coil obtained by winding a wire in a spiral shape on a plane. Furthermore, the planar coil of the secondary coil 21 is a coreless air-core coil. The secondary coil 21 of the planar coil is laminated and fixed on the first flat surface 31a of the thin battery via the electromagnetic shielding film 37. The secondary coil 21 is disposed inside the back plate 22 in a state in which the battery pack 30 is set in the portable electronic device 20, and is disposed in a parallel posture close to the back plate 22. The planar coil of the secondary coil 21 has a central winding diameter larger than the inner diameter of the positioning recess 24, more precisely than the outer shape of the inner protrusion 25, and a hollow portion 26 is provided at the center of the planar coil. The positioning recess 24 is disposed in the hollow portion 26. The battery pack 30 shown in FIG. 3 has an inner projecting portion 25 provided on the inner surface of the back cover 23, which is the back plate 22, inserted into the hollow portion 26 of the secondary coil 21, and an outer surface opposite to the inner projecting portion 25. The positioning recess 24 is provided in the hollow portion 26 of the secondary coil 21.

  18 and 19 are cross-sectional perspective views of the wires of the secondary coils 21 and 61. FIG. The wires of the secondary coils 21 and 61 shown in these drawings connect a plurality of insulated metal wires 28 and 68 in parallel. In this figure, a plurality of insulated metal wires 28 and 68 connected in parallel to each other are indicated by hatching in the same direction, and further surrounded by a chain line. The chain line clarifies the section of the wire, and is not in the actual secondary coil. The insulated metal wires 28 and 68 are formal wires or enamel wires whose surfaces are insulated by an insulating film. The plurality of insulated metal wires 28 and 68 are arranged in parallel to the first flat surface 31a of the thin battery and wound in a spiral shape to form an air-core planar coil.

  The secondary coils 21 and 61 in FIG. 18 and FIG. 19 have four insulated metal wires 28 and 68 arranged in parallel to the first flat surface and wound into concentric spirals to form a two-stage planar coil. The four insulated metal wires 28 and 68 are connected at both ends thereof and connected in parallel to each other. The thickness of the secondary coils 21 and 61 is equal to the thickness of the two insulated metal wires 28 and 68 because the planar coils are laminated in two stages, and the current capacity is the insulated metal wires 28 and 28 connected in parallel. 68 times the number, that is, 4 times. Therefore, the secondary coils 21 and 61 in FIGS. 18 and 19 can increase the number of the insulated metal wires 28 and 68 connected in parallel, have the same thickness, and increase the current capacity several times. In the secondary coil 21 of FIG. 18, the cross-sectional shape of the insulated metal wire 28 is circular. In the secondary coil 61 of FIG. 19, the cross-sectional shape of the insulated metal wire 68 is a square. Since the secondary coil 61 can be adjacent to each other by reducing the gap formed between the insulated metal wires 68, the cross-sectional area of one insulated metal wire 68 can be increased to increase the current capacity.

  Furthermore, in the wire of the secondary coil 81 shown in the cross-sectional view of FIG. 20, the insulating metal wire 88 whose surface is insulated with an insulating film does not have a circular cross-sectional shape. The insulated metal wire 88 has a lateral width parallel to the first flat surface of the thin battery wider than a thickness orthogonal to the flat surface. The insulated metal wire 88 shown in the figure has a rectangular cross section, and has a long side parallel to the first flat surface, and is spirally wound to form a planar coil. In the secondary coil 81 having this structure, the lateral width of the insulating metal wire 88 is widened to increase the current capacity with respect to the thickness of the planar coil. For example, the insulated metal wire 88 whose lateral width is four times the thickness can be made to have the same thickness as the planar coil of the insulated metal wire 88 having a circular cross-sectional shape, and the current capacity can be increased four times or more. Therefore, the secondary coil 21 having this structure can increase the current capacity without changing the thickness by increasing the lateral width.

  The battery pack 30 including the secondary coil 21 having a large current capacity can supply a large amount of power to the primary coil 11 that supplies power by magnetic induction, and can quickly charge the secondary battery 31 with a large current. The battery pack 30 that is rapidly charged by supplying large power from the primary coil 11 also increases the eddy current flowing through the outer can due to the magnetic induction effect. For this reason, there are problems such as heating the outer can by eddy current. In order to prevent this problem, an electromagnetic shielding film 37 is provided between the secondary coil 21 and the first flat surface 31a of the thin battery.

  The electromagnetic shielding film 37 magnetically shields the lines of magnetic force received from the primary coil 11 and prevents the secondary battery 31 from being adversely affected. The electromagnetic shielding film 37 is manufactured in a sheet shape with a material having a high magnetic permeability, for example, an amorphous metal, in order to shield the magnetic lines of force caused by the primary coil 11. The sheet-like electromagnetic shield film 37 is laminated on the first flat surface 31 a of the thin battery, and the secondary coil 21 is laminated on the electromagnetic shield film 37. The electromagnetic shielding film 37 has a shape that covers the first flat surface 31a, that is, the same quadrangle as the first flat surface 31a. The electromagnetic shielding film 37 covers the entire surface or almost the entire surface of the first flat surface 31a.

  As described above, the structure in which the secondary coil 21 is disposed in the secondary battery 31 via the electromagnetic shielding film 37 is affected by the lines of magnetic force, for example, an eddy current flows through the outer can of the secondary battery 31 and is heated. The magnetic field lines radiated from the primary coil 11 are not affected by the secondary battery 31, so that the power efficiency that can be transmitted from the primary coil 11 to the secondary coil 21 can be increased. .

  The spacer 35 has a sheet shape or a thin plate shape laminated on the first flat surface 31a, and is formed into the same square as the first flat surface 31a. The spacer 35 shown in FIG. 5 has a fitting hole 35A for fitting the secondary coil 21 at the center thereof, penetrating both surfaces. 35 A of fitting holes put the secondary coil 21 here, ie, fit and arrange | position in a fixed position. Therefore, the fitting hole 35A is slightly larger than the outer shape of the secondary coil 21 so that the secondary coil 21 can be inserted, for example, 0.2 mm to 1 mm larger than the outer shape of the secondary coil 21. Yes. The spacer 35 in FIG. 5 has a leading portion 35B cut out from a part of the fitting hole 35A so that the lead wire 27 of the secondary coil 21 is disposed. The secondary coil 21 of a planar coil wound in a spiral shape has lead wires 27 at the center and outer periphery. The spacer 35 is provided with a lead portion 35B in order to pull out the lead wires 27 from the planar coil. The lead wire 27 of the secondary coil 21 is drawn from the lead portion 35 </ b> B and connected to the circuit board 32. Further, the thickness of the spacer 35 is made equal to the thickness of the secondary coil 21. In the spacer 35, the secondary coil 21 can be inserted into the fitting hole 35 so that the outer surface of the secondary coil 21 and the outer peripheral surface of the spacer 35 can be the same surface.

  The plastic film 36 is a flexible plastic insulating sheet or label. The plastic film 36 is bonded to the battery 31 and the cover case 33 via an adhesive, or is bonded via an adhesive layer. The plastic film 36 is bonded to the first flat surface 31a and the second flat surface 31b of the thin battery and the surfaces of both side surfaces. Furthermore, the plastic film 36 is provided at the center of the surface attached to the first flat surface 31a side, at the position facing the center hole of the secondary coil 21, and inside the recess 38. The hollow portion 26 is used. However, the plastic film may be provided with a through hole at a position facing the center hole of the secondary coil, and the center portion of the secondary coil inside the through hole may be a hollow portion. The recesses and through holes provided in the plastic film can be provided before adhering to the battery or after adhering.

  The above battery pack is assembled by covering the outer peripheral surface with a plastic film 36. However, the battery pack can include a frame case that covers the outer periphery of the battery. This frame case can be manufactured by integrally molding the whole with plastic.

The above battery pack is assembled in the following steps.
(1) The electromagnetic shielding film 37 is fixed to the first flat surface 31a of the thin battery. The electromagnetic shielding film 37 is fixed to the first flat surface 31a with an adhesive layer provided on the surface.
(2) The spacer 35 is fixed to the surface of the electromagnetic shield film 37. The spacer 35 is bonded to, for example, an adhesive layer provided on the surface of the electromagnetic shield film 37. That is, the spacer 35 is bonded and fixed to the first flat surface 31 a via the electromagnetic shield film 37.
(3) The secondary coil 21 is set in the fitting hole 35A of the spacer 35 and fixed to the first flat surface 31a of the thin battery. The secondary coil 21 is disposed at a fixed position on the first flat surface 31 a through the adhesive layer of the electromagnetic shield film 37. At this time, the lead wire 27 of the secondary coil 21 is drawn from the lead portion 35 </ b> B of the spacer 35.
(4) The circuit board 32 is set at a fixed position on the electrode end face of the battery 31. The circuit board 32 is connected to the positive and negative electrodes of the battery 31 through a lead plate 42 and 43 by a method such as spot welding. At this time, the lead wire 27 of the secondary coil 21 is also connected to the circuit board 32.
(5) The cover case 33 is connected to the outside of the circuit board 32.
(6) A plastic film 36 is attached to the outside of the battery assembly assembled as described above to form a battery pack.

It is a perspective view which shows the charging stand and portable electronic device concerning one Example of this invention. It is a perspective view which shows the set state of the charging stand and portable electronic device which are shown in FIG. It is sectional drawing which shows the connection state of the charging stand shown in FIG. 2, and a portable electronic device. It is a disassembled perspective view which shows the state which took out the battery pack from the portable electronic device shown in FIG. It is a disassembled perspective view of the battery pack shown in FIG. It is a block diagram of the charging stand and portable electronic device concerning one Example of this invention. It is a graph which shows the state in which a position sensor detects the position shift of a primary coil. It is a perspective view which shows the charging stand and portable electronic device concerning the other Example of this invention. It is a top view which shows another example of the figure displayed on the upper surface plate of a charging stand. It is a top view which shows another example of the figure displayed on the upper surface plate of a charging stand. It is a top view which shows another example of the figure displayed on the upper surface plate of a charging stand. It is a top view which shows another example of the figure displayed on the upper surface plate of a charging stand. It is a top view which shows another example of the figure displayed on the upper surface plate of a charging stand. It is a top view which shows another example of the figure displayed on the upper surface plate of a charging stand. It is a top view which shows another example of the figure displayed on the upper surface plate of a charging stand. It is a perspective view which shows the state which sets a portable electronic device to the charging stand shown in FIG. It is a perspective view which shows the charging stand and portable electronic device concerning the other Example of this invention. It is an expanded sectional perspective view which shows an example of a secondary coil. It is an expanded sectional perspective view which shows another example of a secondary coil. It is an expanded sectional perspective view which shows another example of a secondary coil.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10, 50, 70, 90 ... Charge stand 11 ... Primary coil 12, 52, 72, 92 ... Top plate 13 ... Core 13A ... Cylindrical part 13B ... Cylindrical part 14, 74 ... Positioning convex part 15 ... AC power supply 16 ... Position Sensor 17 ... Light-emitting diode 18 ... Speaker 20, 60, 80 ... Portable electronic device 21, 61, 81 ... Secondary coil 22, 62, 82 ... Back plate 23, 63 ... Back cover 24, 64 ... Positioning recess 25 ... Projecting inward Part 26 ... Hollow part 27 ... Leader wire 28, 68, 88 ... Insulated metal wire 30 ... Pack battery 31 ... Battery 31a ... First flat surface 31b ... Second flat surface 32 ... Circuit board 33 ... Cover case 35 ... Spacer 35A ... Fitting hole 35B ... Lead part 36 ... Plastic film 37 ... Electromagnetic shield film 38 ... Recess 41 ... Protective element 42 ... Lead plate 43 ... Lead plate 44 ... Output terminal 45 ... Electrode window 59, 79, 99 ... Figure 79A ... Figure 79B ... Figure 79C ... Figure 79D ... Figure 79E ... Figure 79F ... Figure 79G ... Figure

Claims (7)

Charge base (10), (70) with built-in primary coil (11) connected to AC power supply (15), and electromagnetic coupling to primary coil (11) of this charge base (10), (70) A portable electronic device (20), (60) comprising a rechargeable battery (31) and a rechargeable battery (31) charged with electric power induced in the secondary coil (21). ,
The charging stand (10), (70) has a planar upper surface plate (12), (72) on which the portable electronic device (20), (60) is detachably mounted, and the upper surface plate (12) , (72) has a built-in primary coil (11) to induce an alternating magnetic flux in a specific part,
The portable electronic devices (20) and (60) have planar back plates (22) and (62) to be placed on the top plates (12) and (72) of the charging base (10) and (70). The secondary coil (21) is arranged inside the back plates (22) and (62).
Further, the charging bases (10) and (70) have positioning projections (14) and (74) on the top plates (12) and (72), and are fitted into the positioning projections (14) and (74). The positioning recesses (24), (64) to be combined are provided in the back plates (22), (62) of the portable electronic devices (20), (60),
Furthermore, the secondary coil (21) is an air-core planar coil in which a wire is wound spirally on a plane, and the secondary coil (21) of the planar coil is a back plate (22), (62 ) Is arranged in a posture parallel to the back plates (22) and (62), and the planar coil which is the secondary coil (21) has a central winding diameter positioned inside the positioning recesses (24) and (64). The hollow portion (26) is provided in the center of the planar coil, and the positioning recesses (24), (64) are provided in the hollow portion (26).
The positioning ridges (14), (74) of the charging base (10), (70) are guided to the positioning cavities (24), (64) of the portable electronic device (20), (60) to guide the primary coil ( 11) and the secondary coil (21) are electromagnetically coupled, and AC power is supplied from the primary coil (11) to the secondary coil (21), and the battery (31) of the portable electronic device (20), (60) A charging stand and portable electronic devices that are supposed to be charged.   The charging stand and portable electronic device according to claim 1, wherein the charging stand (10), (70) has a flat surface on the entire surface of the top plate (12), (72). Charge base (50), (70), (90) with built-in secondary coil (21) connected to AC power supply (15), and one of the charge base (50), (70), (90) A portable electronic device (20) comprising a secondary coil (21) electromagnetically coupled to the secondary coil (11), and a rechargeable battery (31) charged with electric power induced in the secondary coil (21) ), (60), (80)
The charging base (50), (70), (90) is a flat top plate (52), (72), (92) on which the portable electronic device (20), (60), (80) is detachably mounted. On the upper surface, and a primary coil (11) is built in to induce an alternating magnetic flux in a specific part of the upper surface plates (52), (72), (92).
The portable electronic device (20), (60), (80) is a flat back plate placed on the top plate (52), (72), (92) of the charging base (50), (70), (90) (22), (62), (82) and a secondary coil (21) is disposed inside the back plate (22), (62), (82),
Set position indicating the position to place the portable electronic device (20), (60), (80) on the top plate (52), (72), (92) of the charging base (50), (70), (90) (59), (79), (99) are displayed, and according to this set position, the top plate (52), (72), (92) is a portable electronic device (20), (60), (80) is placed, the primary coil (11) and the secondary coil (21) are electromagnetically coupled, and AC power is supplied from the primary coil (11) to the secondary coil (21) to carry the mobile phone. A charging stand and a portable electronic device configured to charge the battery (31) of the devices (20), (60), and (80). A charging base (10) including a secondary coil (21) connected to an AC power source (15), and a secondary coil (21) electromagnetically coupled to the primary coil (11) of the charging base (10) And a portable electronic device (20) comprising a rechargeable battery (31) charged with power induced in the secondary coil (21),
The charging stand (10) has a flat upper surface plate (12) on which the portable electronic device (20) can be detachably mounted on the upper surface, and 1 so as to induce an alternating magnetic flux to a specific portion of the upper surface plate (12). Next coil (11) is built-in,
The portable electronic device (20) has a flat back plate (22) placed on the top plate (12) of the charging base (10), and a secondary coil (21) is arranged inside the back plate (22). The charging stand (10) has a built-in position sensor (16) that detects the set position of the portable electronic device (20).
A charging stand and a portable electronic device in which the position sensor (16) detects and displays a position where the portable electronic device (20) is placed. A charging base (10) including a secondary coil (21) connected to an AC power source (15), and a secondary coil (21) electromagnetically coupled to the primary coil (11) of the charging base (10) And a portable electronic device (20) comprising a rechargeable battery (31) charged with power induced in the secondary coil (21),
The charging stand (10) has a flat upper surface plate (12) on which the portable electronic device (20) can be detachably mounted on the upper surface, and 1 so as to induce an alternating magnetic flux to a specific portion of the upper surface plate (12). Next coil (11) is built-in,
The portable electronic device (20) has a flat back plate (22) placed on the top plate (12) of the charging base (10), and a secondary coil (21) is arranged inside the back plate (22). The charging stand (10) has a built-in position sensor (16) that detects the set position of the portable electronic device (20).
The position sensor (16) detects a position on which the portable electronic device (20) is placed, and if the position on which the portable electronic device (20) is placed is deviated from the set position, a position deviation alarm is issued. Charging base and portable electronic devices.   The position sensor (16) detects a position where the portable electronic device (20) is placed, and displays a normal display when the position where the portable electronic device (20) is placed is in the set position. Charging stand and portable electronic devices.   The position sensor (16) detects either the current flowing through the primary coil (11), the power consumption of the primary coil (11), the resonance frequency of the primary coil (11), or the impedance of the primary coil (11). And the charging stand and portable electronic device according to claim 4 which detect the position of portable electronic device (20).

Images