Zero-pivot and large-corner crossed reed type flexible hinge

The invention belongs to the field of a compliant mechanism and relates to a zero-pivot and large-corner crossed reed type flexible hinge. The zero-pivot and large-corner crossed reed type flexible hinge at least comprises a left external rotary part (1), a right external rotary part (2), a rigid middle part (3), a left crossed reed (4) and a right crossed reed (5), wherein the left crossed reed (4) and the right crossed reed (5) are arranged in a manner that crossed lines are collinear; the reed arraying manner of the right crossed reed (5) and the reed arraying manner of the left crossed reed (4) are symmetrical along the crossed lines; the upper end or the lower end of the left crossed reed (4) is connected with the left external rotary part (1), and the lower end or the upper end of the left crossed reed (4) is connected with the rigid middle part (3); the upper end or the lower end of the right crossed reed (5) is connected with the right external rotary part (2), and the lower end or the upper end of the right crossed reed (5) is connected with the rigid middle part (3); the left external rotary part (1) and the rigid middle part (3) are connected through the left crossed reed (4) to form a left flexible hinge; the right external rotary part (2) and the rigid middle part (3) are connected through the right crossed reed (5) to form a right flexible hinge; and ideal rotary central shafts of the left flexible hinge and the right flexible hinge are coaxial.