US Patent No. 9,307,634

CIRCUIT BOARD AND IMAGE FORMING APPARATUS


Patent No. 9,307,634
Issue Date April 05, 2016
Title Circuit Board And Image Forming Apparatus
Inventorship Norikazu Sugiyama, Susono (JP)
Takahiro Yoneyama, Tokyo (JP)
Fumiyuki Yamatsuka, Moriya (JP)
Osamu Mukataka, Toride (JP)
Kumiko Omori, Abiko (JP)
Assignee CANON KABUSHIKI KAISHA, Tokyo (JP)

Claim of US Patent No. 9,307,634

1. A circuit board for supplying power to a unit in an apparatus through a contact member of a line connected to the unit,
said circuit board comprising:
a contact including at least three copper foil patterns connected to a center portion and extending radially from the center
portion with constant spaces between two adjacent copper foil patterns, each of the at least three copper foil patterns having
a predetermined width, and the center of the contact including a center area in which no solder is applied,

wherein one of the at least three copper foil patterns is connected to a signal pattern of a high-voltage circuit,
wherein solder is applied on portions respectively in the at least three copper foil patterns, each of the portions being
away from the center portion of the contact, and

wherein the contact member contacts at least one of the portions in the at least three copper foil patterns and does not contact
the center area.