Elastic tube, control device, and medical equipment

16:

• An elastic tube used in medical equipment, the elastic tube comprising:
• an elastic tube main body having a shape of a long and narrow hollow circular cylinder;
• a securing portion provided at one sealed tip of the elastic tube main body, the securing portion to which a medical instrument can be attached;
• and
• a fixing portion provided at the elastic tube main body in a longitudinal direction thereof, an inextensible body having flexibility having been fixed to the fixing portion, wherein
• the fixing section is provided on an inner periphery of the elastic tube main body,
• as a result of a pressure of gas injected into the elastic tube main body being controlled, the elastic tube expands or contracts on a side opposite over a hollow to the fixing section to which the inextensible body has been fixed, the elastic tube main body expanding when the pressure of the gas is increased and contracting when the pressure of the gas is reduced.

17:

• An elastic tube used in medical equipment, the elastic tube comprising:
• an elastic tube main body having a shape of a long and narrow hollow circular cylinder;
• a securing portion provided at one sealed tip of the elastic tube main body, the securing portion to which a medical instrument can be attached;
• a fixing portion provided at the elastic tube main body in a longitudinal direction thereof, an inextensible body having flexibility having been fixed to the fixing portion;
• and
• a mesh tubular elastic sheet placed between an inner periphery and an outer periphery of the elastic tube main body, the elastic sheet having directionality in expansion and contraction, wherein
• the fixing section is placed between the inner periphery and the outer periphery of the elastic tube main body,
• as a result of a pressure of gas injected into the elastic tube main body being controlled, the elastic tube expands or contracts on a side opposite over a hollow to the fixing section to which the inextensible body has been fixed, the elastic tube main body expanding when the pressure of the gas is increased and contracting when the pressure of the gas is reduced.

26:

• A control device that controls expansion and contraction of the elastic tube according to claim 16, the control device comprising:
• an instruction accepting portion that accepts an instruction to make the elastic tube expand or contract;
• and
• an air pressure variable portion that varies a pressure of gas injected into a hollow of the elastic tube main body based on the instruction accepted by the instruction accepting portion.

28:

• Medical equipment comprising:
• an elastic tube including:
• an elastic tube main body having a shape of a long and narrow hollow circular cylinder;
• a securing portion provided at one sealed tip of the elastic tube main body, the securing portion to which a medical instrument can be attached;
• and
• a fixing portion provided at the elastic tube main body in a longitudinal direction thereof, an inextensible body having flexibility having been fixed to the fixing portion, wherein
• the fixing section is provided on an inner periphery of the elastic tube main body,
• as a result of a pressure of gas injected into the elastic tube main body being controlled, the elastic tube expands or contracts on a side opposite over a hollow to the fixing section to which the inextensible body has been fixed, the elastic tube main body expanding when the pressure of the gas is increased and contracting when the pressure of the gas is reduced;
• and
• a control device that controls expansion and contraction of the elastic tube, the control device including:
• an instruction accepting portion that accepts an instruction to make the elastic tube expand or contract;
• and
• an air pressure variable portion that varies a pressure of gas injected into a hollow of the elastic tube main body based on the instruction accepted by the instruction accepting portion.