US Patent No. 10,973,128

FLEXIBLE PRINTED CIRCUIT AND IMAGING APPARATUS INCLUDING SAME


Patent No. 10,973,128
Issue Date April 06, 2021
Title Flexible Printed Circuit And Imaging Apparatus Including Same
Inventorship Hiroki Kasugai, Osaka (JP)
Assignee Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)

Claim of US Patent No. 10,973,128

1. An imaging apparatus comprising:a main body;
an electronic flash unit that is attached to the main body and requires high voltage where safe distance is required;
a circuit that is stored in the main body and configured to supply an electric power to drive the electronic flash unit; and
a flexible printed circuit configured to electrically connect the electronic flash unit and the circuit to each other,
wherein the flexible printed circuit includes:
a first insulator formed of resin and including a first insulating layer;
a second insulator formed of resin and including a second insulating layer; and
a wiring layer disposed between the first insulating layer and the second insulating layer and formed of a conductive material, the wiring layer to which the high voltage is applied and transmits the electric power to the electronic flash unit,
wherein the flexible printed circuit has a length which is greater than a width and thickness of the flexible printed circuit, the width and the thickness of the flexible printed circuit board being perpendicular to the length,
the flexible printed circuit includes a sealed structure in which the wiring layer is enclosed by flexible insulators formed of resin including the first insulator and the second insulator, in a region where insulation of the wiring layer is required, in a cross-section of the region taken along the width direction and the thickness direction of the flexible printed circuit,
each of the insulators enclosing the wiring layer meets double insulation or reinforced insulation defined by International Electrotechnical Commission (IEC) 60950, which is an IEC standard, for insulating the wiring layer, so as to meet the IEC standard in both the width direction and the thickness direction, and
the sealed structure having the cross-section extends by a predetermined length along a longitudinal direction of the flexible printed circuit.