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1. Diamond-shaped lock core - "hard locking" to prevent rotation
Design objective: Absolutely prevent rotation and pull-out.
Working principle: As we discussed before, it relies on the internal metal spring plates (spines) to strongly clamp into the grooves of the lock rod. This structure is a rigid lock.
Feature
Once locked, it is almost impossible to rotate. If forcibly rotated, it will cause the lock rod to twist, the reed to break or the lead seal housing to tear. The act of rotation itself is damaging the lead seal.
Any visible rotation indicates that the lead seal has been damaged and failed.
2. Circular lock core - "Soft locking" or "controllable rotation"
Design objective: To prevent pull-out but allow for a certain degree of structural rotation.
Working principle: It adopts structures such as ball bearings and chucks. The annular groove on the lock rod allows the balls to "roll" within the groove without coming off. This enables the lock rod to rotate within a certain Angle even when it is locked.
Feature
The ability to rotate is a normal physical characteristic of it, not a fault. This design can prevent the internal mechanism from being directly damaged during transportation due to jolts, vibrations or accidental twisting.
Its tamper-proof core lies in "anti-pull-out". As long as the lock rod cannot be pulled out, the lead seal is intact.
For a complete circular lock core lead seal, its "rotatable" feature is a design requirement and does not affect its tamper-proof (pull-proof) security.
However, if a diamond-shaped lock core lead seal rotates, this is definitely not a normal phenomenon but a clear signal that its interior has been damaged. A rotatable diamond-shaped lead seal has lost its tamper-proof function!
