Fig 1Pin tumbler lockDrag the key · Space to insert / turnshear 0/5 · locked
Pin tips at the shear line — lit when that stack clearsFive key + driver stacks; springs seat above the drivers钥匙齿高抬起弹子，剪口对齐，锁芯才能转。A matching key lifts each key pin so its top meets the shear; driver pins sit flush above. Only when all five stacks clear can the plug rotate (~30°).