2023-Utility Model--A traction rope breaking protection device for a traction type zip line

2023 - Utility Model - A recovery device for a mountain road pulley

2023-Utility Model--A Self-powered Adjustable Speed ​​Climbing Fitness Device

2023-A speed limiting device for a zip line

2024-Utility Model-Deceleration Pulley for Slip Rope

2024-Utility Model--A Safety Buckle

2024-Utility Model--An angle measuring mechanism that is easy to adjust