WIRELESS BATTERY CHARGER OF MOVING COIL TYPE

• US 20120326659A1
• Filed: 06/10/2012
• Published: 12/27/2012
• Est. Priority Date: 06/21/2011
• Status: Abandoned Application

• Current Assignee: Tanashin Denki Company Limited
• Original Assignee: Tanashin Denki Company Limited
• Inventors: SHUKUYA, Rei
• Application Number:
  US13/492,915
• Publication Number:
  US 20120326659A1
• Time in Patent Office: Days
• US Class Current: 320/108
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence

Abstract

The present invention discloses a wireless battery charger of moving coil type that moves a table (15) that mounts a transmitter coil (14) freely in an X-axis direction and in a Y-axis direction having a fixing guide (21), an X-axis slider (6) a Y-axis slider (9), a motor (10), a power transfer means (11) that transfers power of the motor to one of the X-axis slider or the Y-axis slider, a power distribution part (12) that distributes the power of the motor transferred to one slider to another slider, and the table (15) that mounts the transmitter coil (14) wherein the transmitter coil mounted on the table can move freely by transferring the power of the motor to both the one slider and the another slider. Therefore a structure of the battery charger can be simplified, the battery charger can be cheaper and electrical efficiency can be improved.

Claims

1. A wireless battery charger (1) of moving coil type, comprising a lower case (3);

an upper case (5) that covers over the lower case;

a two dimensional moving mechanism (4) that is placed in the lower case and mounts a transmitter coil (14) of the wireless battery charger; and

a circuit board (16) that is placed beneath the upper case, wherein

when a rechargeable battery (2) having a receiver coil (C) is placed on an upper surface of the upper case, a position of the rechargeable battery is detected by the circuit board, the transmitter coil is moved close to the rechargeable battery by using the two dimensional moving mechanism, and then the rechargeable battery is charged by supplying power from the transmitter coil to the rechargeable battery,

the two dimensional moving mechanism comprises;

a fixing guide (21, 103) that is composed of a main guide (7, 101) and a sub guide (8, 102) placed parallel to one of an X-axis direction or a Y-axis direction;

an X-axis slider (6, 104) that can move freely in the X-axis direction;

a Y-axis slider (9, 107) that can move freely in the Y-axis direction;

a motor (10) that can drive both the X-axis slider and Y-axis slider simultaneously;

a power transmission part (11) that transfers power of the motor to one of the X-axis slider or the Y-axis slider;

a power distribution part (12, 113) that distributes the power transferred to one slider from the motor to another slider; and

a table (15) that is fixed to the another slider and mounts the transmitter coil,

the one slider is attached to the fixing guide so as to move freely in the X-axis direction or the Y-axis direction,

guide portions (28, 28, 106, 106) are formed parallel to a direction perpendicular to the fixing guide on a part of the one slider fixed to the fixing guide,

the another slider not attached to the fixing guide is attached to the one slider fixed to the fixing guide so as to move freely along the guide portions of the one slider,

a set of gears (33) that is a part of the motor and the power transmission part is formed on the one slider,

the power of the motor is transferred to the one slider through the set of gears and transferred to the another slider through the power distribution part, and

the transmitter coil mounted on the table that is fixed to the another slider can move freely both in the X-axis direction and in the Y-axis direction.

2. The wireless battery charger of moving coil type according to claim 1, wherein:

the one slider is the Y-axis slider (9),

the another slider is the X-axis slider (6), and

a salient portion (62) is formed on a part of the set of gears,

a cam groove (50) parallel to the Y-axis direction is formed on a part of the X-axis slider, and

the power distribution part (12) is formed by engaging the salient portion of the gears with the groove of the X-axis slider to transform rotating power of the set of gears to linear motion power in the X-axis direction by the salient portion and the groove.

3. The wireless battery charger of moving coil type according to claim 1, wherein:

the one slider is the X-axis slider (104),

the another slider is the Y-axis slider (107),

a salient portion (112) is formed on a part of the set of gears,

a cam groove (108) parallel to the X-axis direction is formed on a part of the Y-axis slider, and

the power distribution part (113) is formed by engaging the salient portion of the gears with the cam groove of the Y-axis slider to transform rotating power of the set of gears to linear motion power in the Y-axis direction by the salient portion and the groove.