摘要:
Herein disclosed is a robot arm mechanism (100) comprising a first arm link mechanism (110) and a second arm link mechanism (120), a robot arm driving mechanism 130 for driving the first arm link mechanism (110) and the second arm link mechanism (120), and a link retaining mechanism (140) for pivotably retaining the first arm link mechanism (110) and the second arm link mechanism (120), in which a third arm link (113) and a fourth arm link (114) of the first arm link mechanism (110) are kept forward in a first rotation direction (130a), in which the first arm link mechanism (110) and the second arm link mechanism (120) are extended, thereby enabling to prevent the quadric crank chain constituting the robot arm mechanism (100) from being flattened out while the first arm link mechanism (110) and the second arm link mechanism (120) are extended, and improving resistance to deformation, in comparison with the conventional robot arm mechanism (900).