JP2011125137A - Charger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a charger which immediately recognizes mounting of an electronic apparatus, and supports a plurality of electronic apparatuses. <P>SOLUTION: The charger is equipped with: a plurality of primary coils 11 which are coupled electromagnetically with a secondary coil for charging a secondary battery provided in an electronic apparatus by electromagnetic induction and charges the secondary battery; and a detection means (a pressure-sensitive sheet 12) for detecting electronic apparatus information including the mounting position, shape and weight thereof. The charger further is equipped with: a storage means (storage device 14) for storing the electronic apparatus information detected by the detection means; a discrimination means (a controller 13) which discriminates the type of the electronic apparatus from the electronic apparatus information detected by the detection means, and the electronic apparatus information stored in the storage means; and a selection means (selection circuit 16) for selecting the primary coil to be energized in order to supply power to an electronic apparatus discriminated by the discrimination means. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a charger that charges a secondary battery provided in an electronic device in a contactless manner by electromagnetic induction, and more particularly, to a charger that includes a plurality of primary coils.

  Many of recent electric toothbrushes and electric shavings are charged with a non-contact charger using electromagnetic induction.

  The advantage of the non-contact charger is mainly that it can prevent water droplets and electric shocks at the charging terminal, but it does not require an externally exposed charging terminal and considers the influence of static electricity etc. Nowadays, it has begun to be used for electronic devices such as mobile phones and digital cameras.

  In addition, some of such non-contact chargers include a plurality of primary coils for electromagnetic induction and can simultaneously charge a plurality of electronic devices.

  However, such a non-contact charger having a plurality of primary coils is energized not only to the primary coil where the electronic device is placed but also to the primary coil where the electronic device is not placed. Therefore, power efficiency was not good.

  Therefore, Patent Document 1 proposes a charger that sequentially energizes a plurality of primary coils and selects a primary coil to be energized by determining installation of an electronic device according to a change in load.

JP 2003-224937 A

  However, in the above prior art, since the placement of the electronic device is recognized and charged in the same part, the placement of the electronic device cannot be recognized until the primary coil on which the electronic device is placed is energized, and the responsiveness is high. It's not good. Moreover, it is difficult to discriminate the mounted electronic device.

  In order to solve these problems, there is a technology to install a primary coil for recognition in an electronic device separately from the primary coil for charging, but there is a problem that the structure of the electronic device is complicated and the cost is increased. .

  An object of the present invention is to provide a charger that can immediately recognize placement of an electronic device and can handle a plurality of electronic devices.

  In order to achieve the above object, a charger according to claim 1 is electromagnetically coupled to a secondary coil for charging a secondary battery provided in an electronic device by electromagnetic induction to charge the secondary battery. A plurality of primary coils, detection means for detecting electronic device information including a mounting position, shape, and weight of the electronic device, storage means for storing the electronic device information detected by the detection means, and A determination unit that determines the type of the electronic device from the electronic device information detected by the detection unit and the electronic device information stored in the storage unit, and supplies power to the electronic device that is determined by the determination unit In order to achieve this, the apparatus includes a selection unit that selects the primary coil to be energized.

  According to the charger of the present invention, it is possible to immediately recognize the placement of the electronic device and handle a plurality of electronic devices.

It is an external appearance perspective view which shows the state in which the some electronic device was mounted on the charger which concerns on embodiment of this invention. It is an external appearance perspective view which shows the arrangement | sequence of the primary coil inside the charger of FIG. It is a see-through | perspective top view which shows the positional relationship of the charger of FIG. 1, and the coil of an electronic device. It is a circuit block diagram of the charger which concerns on the 1st Embodiment of this invention. It is a circuit block diagram of the charger which concerns on the 2nd Embodiment of this invention.

  The present invention will be described in detail below with reference to the drawings.

  FIG. 1 is an external perspective view showing a state in which a plurality of electronic devices are placed on a charger according to an embodiment of the present invention.

  As shown in FIG. 1, by placing the electronic device and its battery on the pressure-sensitive sheet 12 of the charger 1, the electronic device can be charged.

  Here, there are a digital single-lens reflex camera 21 and a compact digital camera 31 as electronic devices, and there are a secondary battery 211 for a digital single-lens reflex camera and a secondary battery 311 for a compact digital camera. The secondary battery may be built in the camera, or may be placed on the pressure sensitive sheet 12 independently of the camera as shown in FIG.

  The pressure sensitive sheet 12 is a sheet such as a piezoelectric element that senses pressure and converts it into an electrical signal.

  2 is an external perspective view showing the arrangement of primary coils inside the charger of FIG.

  As shown in FIG. 2, the charger 1 includes a plurality of primary coils (charging coils) 11 (15 coils in FIG. 2), and a pressure sensitive sheet 12 is formed of a material that can transmit electromagnetic waves. The device can be placed on the pressure-sensitive sheet 12.

  3 is a transparent top view showing the positional relationship between the charger of FIG. 1 and the coil of the electronic device.

  A digital single-lens reflex camera 21 as an electronic apparatus shown in FIG. 3 has a secondary battery 211 loaded therein. Further, the secondary battery 211 has a secondary coil 212. The primary coil 11 is electromagnetically coupled to a secondary coil 212 for charging the secondary battery 211 by electromagnetic induction, and charges the secondary battery 211.

  When the primary coil 11 of the charger 1 in the portion where the secondary coil 212 is placed is energized to generate an electromagnetic wave, the secondary coil 212 receives the electromagnetic wave, so that an induced electromotive force is generated. The secondary battery 211 can be charged.

  Even when only the secondary battery 211 is placed on the charger 1, it can be charged in the same manner as when it is loaded and placed on the digital single-lens reflex camera 21.

  The case of the compact digital camera 31 loaded with the secondary battery 311 is as follows.

  As in the case of the digital single lens reflex camera 21, the secondary battery 311 is charged by energizing the primary coil 11 of the charger 1 in the portion where the secondary coil 312 in the secondary battery 311 is placed. can do.

  Similarly, when the secondary battery 311 is placed on the charger 1 alone, it can be charged by energizing the primary coil 11 of the charger 1 at the place of placement.

  FIG. 4 is a circuit block diagram of the charger according to the first embodiment of the present invention.

  Hereinafter, the configuration will be described together with the operation.

  In FIG. 4, the pressure sensitive sheet (detection means) 12 is connected to a control device (control means, determination means) 13. When an electronic device is placed on the pressure-sensitive sheet 12, information (electronic device information) about the electronic device such as the mounting position, the shape of the electronic device, and the weight of the electronic device is sent from the pressure-sensitive sheet 12 to the control device 13. .

  The control device 13 collates the information related to the electronic device from the pressure sensitive sheet 12 with the information related to the electronic device stored in the storage device 14 and identifies (determines) the placed electronic device.

  The control device 13 functions as a determination unit that determines the type of electronic device from the electronic device information detected by the detection unit and the electronic device information stored in the storage device 14.

  Then, the control device 13 selects the primary coils 11 (11-1 to 11n) to be energized by the selection circuit 16 via the switches (SW1 to SWn) 17 (17-1 to 17-n). The electronic circuit is charged by driving the oscillation circuit 15 that oscillates the current flowing through the circuit 11.

  That is, the selection circuit 16 functions as a selection unit that selects the primary coil 11 to be energized in order to supply electric power to the electronic device determined by the control device 13 as a determination unit.

  The time for energizing the primary coil 11 (oscillation circuit 15) is determined by the mounted electronic device. Further, when the signal from the pressure sensitive sheet 12 disappears, such as when an electronic device is removed during charging, the control device 13 receives information from the pressure sensitive sheet 12 and stops energization of the oscillation circuit 15. .

  Next, as an explanation of an operation when a plurality of electronic devices are mounted instead of one, an operation when one of the electronic devices is in a charged state will be described.

  It is assumed that the signal of the second electronic device is received by the pressure sensitive sheet 12 when the first electronic device is in a charged state.

  The control device 13 was placed by comparing the information on the second electronic device from the pressure-sensitive sheet 12 with the information in the storage device 14 as in the case where only one electronic device was placed. Identify electronic devices.

  If the electronic device can be specified, the selection circuit 16 can control the primary coil 11 that energizes the first electronic device to the primary coil that can efficiently charge the second electronic device under the control of the control device 13. 11 is selected and energized.

  The energization time is the remaining energization time of the primary coil 11 that has been energized to charge the first electronic device.

  When the time for energizing the plurality of primary coils 11 at the same time has elapsed, the control device 13 stops energization of the primary coil 11 that has been energized to charge the first electronic device, and Charging is complete.

  Thereafter, in order to fully charge the second electronic device, the selection circuit 16 is selected again as the primary coil 11 for charging the second electronic device, and the remaining for fully charging the second electronic device. For the time, the oscillation circuit 15 energizes the selected primary coil 11 again.

  Thus, even when a plurality of electronic devices are placed on the charger 1, the installation of the electronic devices can be immediately detected and charging can be performed.

  FIG. 5 is a circuit block diagram of a charger according to the second embodiment of the present invention.

  The second embodiment is different from the first embodiment shown in FIG. 4 in that m oscillation circuits 15 are provided, and other than that, the configuration is almost the same as that of FIG. .

  The oscillation circuits 15-1 to 15-m are connected to the primary coil 11-1 to the primary coil 11-n through switches SW1 (17-1) to SWn (17-n) in the charger 1, respectively.

  The oscillation circuits 15-1 to 15-m are circuits that oscillate at different oscillation frequencies and amplitudes.

  When the electronic device is placed on the charger 1, information about the electronic device is sent from the pressure sensitive sheet 12 to the control device 13.

  The control device 13 collates the information related to the electronic device from the pressure sensitive sheet 12 with the information related to the electronic device stored in the storage device 14 and specifies the placed electronic device.

  The control device 13 selects the primary coil 11 to be energized by the selection circuit 16 via the switch 17, and the oscillation circuit 15-1 to the oscillation circuit 15 are suitable for charging the mounted electronic device. Select from -m to charge the electronic device.

  The case where a plurality of electronic devices are placed is the same as in the first embodiment.

  That is, information on the mounted electronic device is transmitted from the pressure sensitive sheet 12 to the control device 13, and the control device 13 is stored in the storage device 14 with the information on the electronic device received from the pressure sensitive sheet 12. Check against information related to electronic equipment.

  When the oscillation circuit 15 charging the electronic device already placed is the same as the oscillation circuit 15 charging the newly placed electronic device, charging is performed in the same manner as in the first embodiment.

  When the oscillation circuit 15 that charges the electronic device already placed is different from the oscillation circuit 15 that charges the newly placed electronic device, the control device 13 uses the selection circuit 16 to newly generate the oscillation circuit 15. Connect.

  The control device 13 connects the oscillation circuit 15 and the primary coil 11 and performs charging, so that different electronic devices can be charged simultaneously with each electronic device under efficient charging conditions.

  According to the present embodiment, by having a plurality of oscillation circuits 15, charging can be performed under efficient charging conditions depending on the type of electronic device placed. Even when a plurality of electronic devices are placed, charging can be performed using the oscillation circuit 15 that is efficient for each electronic device.

DESCRIPTION OF SYMBOLS 1 Charger 11 Primary coil 12 Pressure sensitive sheet 13 Control apparatus 14 Memory | storage device 15 Oscillation circuit 16 Selection circuit 17 Switch 21 Electronic device (digital single-lens reflex camera)
211 Secondary battery 212 Secondary coil 31 Electronic equipment (compact digital camera)
311 Secondary battery 312 Secondary coil

Claims (3)

A plurality of primary coils that are electromagnetically coupled to a secondary coil for charging a secondary battery provided in the electronic device by electromagnetic induction, and charge the secondary battery;
Detection means for detecting electronic device information including the mounting position, shape, and weight of the electronic device;
Storage means for storing the electronic device information detected by the detection means;
Discriminating means for discriminating the type of the electronic equipment from the electronic equipment information detected by the detecting means and the electronic equipment information stored in the storage means;
Selection means for selecting the primary coil to be energized to supply power to the electronic device determined by the determination means;
A charger comprising:   2. The charger according to claim 1, wherein the detecting means is a pressure sensitive sheet. A plurality of oscillation circuits for oscillating the current flowing through the primary coil;
The control means for storing information on the power suitable for the electronic apparatus determined by the determination means in the storage means and causing the oscillation circuit suitable for the determined electronic apparatus to oscillate. The charger according to 1 or 2.

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