To provide a conduit switching device of an endoscope preventing abrasion and damage of a check valve and improving cleaning properties.
A check valve unit 151 of this conduit switching device 100 includes: a check valve 153 that is opened/closed according to an internal pressure of the cylinder 111 to be closely stuck to the inner peripheral face of a cylinder 111 or separated from the inner peripheral face thereof; a contact member 155 to which the check valve 153 is stuck and that comes into contact with a contact face 111c; and a support member 157 that supports the check valve 153 and the contact member 155 such that, when a piston shaft part 123 moves with respect to the cylinder 111, the contact member 155 constantly contacts with the contact face 111c, and, when the contact member 155 comes into contact with the contact face 111c, the location of the check valve 153 is fixed relative to the cylinder 111.
Takakura Shigeo
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Morisezo Iseki
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Next Patent: PUTTER HEAD