Medical operation device

A medical operation device including:

• a rotary cylinder that is rotatably provided on a device main body, wherein the rotary cylinder defines a hollow portion;
• an insertion portion pressing member arranged in the hollow portion of the rotary cylinder, wherein the insertion portion pressing member includes an elastic tube element having:
• an outer surface that defines a mounting/demounting hole through which an insertion portion of a medical instrument for observation is inserted, and
• an inner surface that defines a fluid chamber, wherein the fluid chamber covers a circumference of the mounting/demounting hole;
• and
• an insertion portion mounting section cover that is provided in the mounting/demounting hole of the insertion portion pressing member, wherein the insertion portion mounting section cover is configured to prevent the insertion portion of the medical instrument from directly contacting the rotary cylinder and the insertion portion pressing member, and
• wherein the insertion portion pressing member is configured to switch between:
• a first state in which a fluid is provided to the fluid chamber to inflate the elastic tube element to press the insertion portion mounting section cover against the insertion portion that is inserted in the mounting/demounting hole to fix the insertion portion to the rotary cylinder, and
• a second state in which the fluid is removed from the fluid chamber to deflate the elastic tube element to allow the insertion portion that is inserted in the mounting/demounting hole to move relative to the rotary cylinder,
• wherein the medical operation device further includes a switch that is configured to be operated by a user to switch the insertion portion pressing member between the first state and the second state, and
• wherein the rotary cylinder and the insertion portion of the medical instrument are integrally rotatable relative to the device main body when the insertion portion pressing member is configured in the second state.