Artificial knee joint, prosthetic limb, and joint device

An artificial knee joint comprising:

• a thigh joint part provided on a thigh part side;
• at least one rotation shaft member rotatably provided around a rotation shaft;
• a lower leg part rotatably connected to the thigh joint part via the rotation shaft member and a pair of links provided at both end portions of the rotation shaft member;
• and
• a fixing member that presses and fixes the pair of links against both end portions of the rotation shaft member, wherein
• at least one of the thigh joint parts and the lower leg part is rotatably provided on an outer periphery of the rotation shaft member.

A prosthetic limb comprising:

• a thigh part;
• a thigh joint part provided on the thigh part side;
• a lower leg part rotatably connected to the thigh joint part via at least one rotation shaft member;
• a bearing that rotatably supports the rotation shaft member;
• and
• an elastic body that is in contact with an outer peripheral surface of the rotation shaft member orthogonal to a rotation shaft, has a longer length from the rotation shaft than the bearing in a direction orthogonal to the rotation shaft, and is elastically deformable in a radial direction of the rotation shaft member.

A prosthetic limb comprising:

• a thigh part;
• a thigh joint part provided on the thigh part side;
• at least one rotation shaft member rotatably provided around a rotation shaft;
• a lower leg part rotatably connected to the thigh joint part via the rotation shaft member and a pair of links provided at both end portions of the rotation shaft member;
• and
• a fixing member that presses and fixes the pair of links against both end portions of the rotation shaft member, wherein
• at least one of the thigh joint parts and the lower leg part is rotatably provided on an outer periphery of the rotation shaft member.

A joint device comprising:

• a first member;
• a second member rotatably connected to the first member via at least one rotation shaft member;
• a bearing that rotatably supports the rotation shaft member;
• and
• an elastic body that is in contact with an outer peripheral surface of the rotation shaft member orthogonal to a rotation shaft, has a longer length from the rotation shaft than the bearing in a direction orthogonal to the rotation shaft, and is elastically deformable in a radial direction of the rotation shaft member.

A joint device comprising:

• a first member;
• at least one rotation shaft member rotatably provided around a rotation shaft;
• a second member rotatably connected to the first member via the rotation shaft member and a pair of links provided at both end portions of the rotation shaft member;
• and
• a fixing member that presses and fixes the pair of links against both end portions of the rotation shaft member, wherein
• at least one of the first member and the second member is rotatably provided on an outer periphery of the rotation shaft member.