Duct that is detachable to a main body, and a main body including a duct and a detachable device

A duct that is detachable to a main body, the duct comprising:

• a flow passage to flow air, the flow passage including a flexible structure;
• a ventilation opening at a first end of the flow passage;
• and
• a protrusion, which protrudes in an attachment direction of the duct into the main body, and which is disposed to contact an interfering structure interposed between the flow passage and a body side flow passage of the main body, wherein
• the ventilation opening and at least a part of the flow passage are passable through a recess of a detachable device which is detachable from the main body.

A duct that is attachable to a main body, the duct comprising:

• a flow passage to flow air, the flow passage including a flexible structure;
• a ventilation opening at a first end of the flow passage;
• and
• a connection opening at a second end of the flow passage, the connection opening including a facing direction that intersects with a facing direction of the ventilation opening, wherein
• the ventilation opening and at least a part of flow passage are passable through a recess of a detachable device which is detachable from the main body, and the ventilation opening and at least the part of the flow passage are passable through the recess in an insertion direction of the detachable device into or out of the main body while the detachable device is being inserted into or out of the main body.

A main body comprising:

• a detachable device that is attachable to and detachable from the main body;
• and
• a duct that is attachable to and detachable from the main body, wherein
• at least a part of the duct is at a recess of the detachable device, and at least the part of the duct is passable through the recess in an insertion direction of the detachable device into or out of the main body while the detachable device is being inserted into or out of the main body.