Patent ID: 11930998
Assignee: OLYMPUS CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 7:
8. An endoscope comprising a vent control valve, wherein the vent control valve comprises:
a shaft body including a pin fixing portion which is provided in an outer peripheral surface and to which one end of a cam pin is fixed, and a vent hole including a long hole set to a predetermined depth with an opening provided in one end surface and a long hole communication hole including a vent opening formed in the outer peripheral surface and configured to cause an outside and an inside of the long hole to communicate with each other through the vent opening;
a tubular member including a shaft body hole that is a through-hole configured to house the shaft body rotatably around an axis and movably in an axial direction and extending in a longitudinal direction along a center axis, and a cam groove in which another end portion of the cam pin is slidably disposed, on an outer peripheral portion;
a rotational member including a tubular member hole where the tubular member is disposed rotatably around an axis, an elongated cam pin groove where the other end portion of the cam pin protruded outward from the cam groove is disposed, the cam pin groove extending in a longitudinal direction along a center axis from one end surface and causing the tubular member hole and an outside to communicate with each other, and a plurality of engaging holes provided at predetermined positions of another end surface; and
a cylindrical housing member including an attaching portion fixedly provided in a casing through-hole causing an internal space of a casing configuring the endoscope and an outside to communicate with each other, and a housing hole including a bottom surface opening of a housing through-hole communicating with the internal space, in a bottom surface, and configured to house the rotational member.