A spring buckle is a type of fastener that utilizes an internal spring mechanism to generate tension, enabling quick and automatic locking as well as manual release. Its core working principle is as follows: in the open state, the user must overcome the spring's tension to activate the mechanism. Once released, the spring tension automatically returns the latch or locking pin to its original position, securing a safe and reliable connection. It is widely used in applications such as backpacks, pet leashes, keychains, and similar scenarios.

Usage Tips for Different Scenarios
Outdoor Equipment: Opt for stainless steel buckles (with a rustproof rating of IPX5 or higher) to prevent failure in humid environments.
Pet Leashes: Check the spring rebound daily. Replace immediately if worn (recommended every 6 months).
Daily Organization: Lightweight aluminum buckles (weight < 10g) are more suitable for keychains.
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