Noncontact transmitting apparatus

摘要

A noncontact transmitting apparatus includes first and second noncontact transmitting units mounted on a main device and an attachment device, respectively. The second noncontact transmitting unit is removably attachable to the first noncontact transmitting unit for enabling noncontact signal transfer between the main device and the attachment device. Each of the noncontact transmitting units includes a power coil and a signal coil. The power coil is wound on a first core to supply power from the main device to the attachment device by electromagnetic induction. The first cores of the first and second noncontact transmitting units face each other at a first position when the attachment device is loaded on the main device. The signal coil is wound on a second core for signal transfer between the main device and the attachment device by electromagnetic induction. The second cores of the first and second noncontact transmitting units face each other at a second position when the attachment device is loaded on the main device. When the attachment device is rotated about the first core by a specified angle, the signal coil of the second noncontact transmitting unit is moved from the second position. This makes it possible for the main device such as a cellular phone, and the attachment device, such as a camera, to transfer power and signals between them with a simple configuration with high reliability when the attachment device is loaded on the main device.