Pressing Tool Clamping Force Limiting Cam Mechanism

The patent applies preliminary anti-action by introducing a control cam that prevents the pressing jaws from being subjected to excessive stress in the first place. The cam mechanism limits the spreading motion of the arms to a controlled range, preventing the jaws from entering a dangerous stress zone before breakage can occur. This proactive limitation resolves the contradiction by maintaining jaw integrity while preserving slim design for accessibility.

The patent implements feedback through the control cam mechanism that continuously monitors and regulates the spreading motion of the arms. As the arms spread and jaws close, the cam profile provides progressive resistance that prevents excessive force application. This feedback control ensures effective pressing is achieved while automatically preventing force levels that would cause jaw breakage, resolving the contradiction between productivity and reliability.

The patent applies local quality by modifying only the critical region of the inlet curve where it interacts with the control cam. Instead of changing the entire inlet curve geometry, the patent introduces a specific cam profile segment that provides force limitation precisely where needed - in the region where excessive spreading would occur. This localized modification maintains necessary pressing force while preventing excessive stress, resolving the contradiction between force and service life.