| 摘要 |
PROBLEM TO BE SOLVED: To provide a link operation device which can precisely operate in a wide operation range while being compact in configuration, does not damage a wire rod which is inserted into a space of the inside of a link mechanism, and can suppress an increase in a load to the device accompanying bending of the wire rod.SOLUTION: A link hub 3 at a tip side is connected to a link hub 2 at a base end side so as to be changeable in postures via three or more sets of link mechanisms 4. Each link mechanism 4 is composed of an end link member 5 at the base end side, an end link member 6 at the tip side and a center link member 7. A wire rod 33 whose both ends are held at wire rod holding points Q1, Q2 located on link hub center shafts B, C is arranged between both the link hubs 2, 3. When a distance from a middle point O, in a state that the link hubs 2, 3 are parallel to each other, up to spherical link centers P1, P2 is denoted by D, and a distance from the spherical link centers P1, P2 up to the wire rod holding points Q1, Q2 is denoted by H, a relationship of H=0.5×D is satisfied. |
