Functions of the Pulley Assembly:

1. Change the direction of force on the traction wires: Acts as a guiding and redirecting structure for the angulation wires, transmitting the pulling force from the control section along the designed path to the distal bending portion.
2. Enable efficient force transmission: Converts the operator’s knob movements into stable and controllable wire tension through rolling or semi-rolling contact mechanisms.
3. Reduce friction and stress concentration: Compared with directly bending the wire along the structure, the pulley significantly lowers friction between the wire and metal parts, reducing the risk of wire fatigue and breakage.
4. Ensure bending accuracy and consistency: Maintains balanced tension distribution among multiple wires in the up/down and left/right directions, achieving symmetrical and repeatable bending angles.
5. Enhance system durability: Minimizes wire wear and metal component abrasion, making it a key component for the long-term reliable operation of the endoscope’s bending system.

During assembly and maintenance, the pulley assembly’s installation position, rotational flexibility, and wire fixation directly affect the endoscope’s bending feel, maximum bending angle, and service life, making it a core mechanical component requiring careful inspection and precise assembly.

For more details about our products,please contact us for a catalog,thanks. Click Here！