Patent ID: 11911896
Assignee: WUXI FRIEDRICH MEASUREMENT AND CONTROL INSTRUMENTS CO., LTD
Field: Handling (Mechanical engineering)
Classification: CPC B  G | IPC B  G

Claim 8:
9. The control method according to claim 8, wherein in step 4, the computer de-energizes the electromagnet, wherein a magnetic force between the electromagnet and the magnetic plate disappears, and the spring rebounds from a compressed state; an upper part of the spring pushes the magnetic plate to move upward, and the second spherical-hinge base is driven to rotate around the second pin shaft through the pull rod; the second spherical-hinge base rotates counterclockwise around the second pin shaft; a gap between the first spherical-hinge base and the second spherical-hinge base is reduced, and a clamping force received by the steel ball in the first fixed arc groove and the second fixed arc groove is increased, so as to lock the steel ball; in this way, the self-locking upper hinge completes self-locking; and the self-locking lower hinge completes self-locking in the same way as the self-locking upper hinge.