Chain Tensioner Spring Locking for Pin-Free Assembly

The invention extracts and eliminates the stopper pin from the assembly process. Instead of using a separate stopper pin component, the patent designs the torsion coil spring with an integrated locking structure where the spring's own ends engage with each other to maintain the compressed state during assembly, removing the need for external pin components and simplifying the overall assembly procedure.

The patent merges the function of the stopper pin into the torsion coil spring structure itself. The spring ends are designed to lock together, combining the spring's biasing function with its own locking mechanism, thereby eliminating the need for a separate stopper pin component and reducing device complexity.

The patent applies preliminary action by pre-compressing the torsion coil spring during manufacturing and locking its ends together in this compressed state. This allows the spring to be assembled in a controlled, low-energy state without applying full biasing force to the chain, making assembly easier while preventing damage. The full tension is then activated automatically after assembly is complete.

The invention introduces dynamics by designing a transition mechanism where the torsion coil spring transitions from a locked, compressed state during assembly to an unlocked, active state after assembly. The spring ends are initially engaged to maintain compression without applying force to the chain, then automatically disengage to apply the full biasing force, allowing the system to adapt its state based on the assembly phase.

The invention extracts and eliminates the stopper pin component entirely from the system. Instead of using a separate pin that needs to be inserted and later removed, the torsion coil spring is designed with self-locking ends that maintain the compressed state during assembly and then automatically unlock, eliminating the source of the dropping hazard entirely.

The patent applies self-service by designing the torsion coil spring to automatically manage its own locking and unlocking without requiring external stopper pins. The spring ends engage with each other to maintain compression during assembly, then automatically disengage to activate the biasing force, making the system self-regulating and eliminating components that could cause harm.