Sitting or lying furniture

A piece of sitting or lying furniture, comprising:

• a support frame;
• an operating device configured for a user to sit on, lie on or lean against,
• wherein the operating device includes a self-supporting main textile part configured to react forces imparted upon the operating device into the support frame self-acting by tensions formed in the main textile part,
• wherein the main textile part is configured as a flat contexture,
• wherein the operating device includes at least one auxiliary unit group including at least two auxiliary units which are directly and jointly connected with at least one edge of the main textile part at least in sections, so that the main textile part is directly supported at the at least two auxiliary units,
• wherein the at least two auxiliary units are attached at the support frame so that the main textile part is indirectly supported by the at least two auxiliary units at the support frame,
• wherein the at least two auxiliary units run from the at least one edge of the main textile part to different attachment locations at the support frame,
• wherein the at least one edge of the main textile part includes at least two edges,
• wherein the at least one auxiliary unit group includes two auxiliary unit groups
• wherein the main textile part cooperates at least along opposite edges of the at least two edges respectively with the at least one auxiliary unit group,
• wherein a first edge of the opposite edges of the main textile part cooperates with an auxiliary unit of a first auxiliary unit group of the at least two auxiliary unit groups and with a second auxiliary unit of the first auxiliary unit group and a second edge of the opposite edges of the main textile part cooperates with a first auxiliary unit of a second auxiliary unit group of the at least two auxiliary unit groups and with a second auxiliary unit of the second auxiliary unit group of the at least two auxiliary unit groups.