Nanjing Duotai Smart Technology Co., Ltd.
Nanjing Duotai Smart Technology Co., Ltd.
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Zinc alloy is a mainstream material for smart door lock exteriors, offering the following characteristics:
Advantages:
Easy to Mold: Die-casting allows intricate designs and diverse surface finishes (e.g., electroplating, spraying) for customization.
Cost-Effective: More affordable than copper or stainless steel, ideal for mass-market adoption.
Corrosion Resistance: Oxide-treated surfaces enhance durability in humid or harsh environments.
Disadvantages:
Lower Strength: Less resistant to brute-force attacks compared to stainless steel or copper, but compensatable with Grade C locks and anti-pry mechanisms.
Oxidation Risk: Prolonged exposure to moisture may degrade surfaces, requiring periodic maintenance.
The four requested unlocking methods (fingerprint, PIN, card, key) are standard in most products, but consider these details:
Fingerprint Recognition:
Prioritize semiconductor sensors over optical scanners (vulnerable to replication).
Opt for ceramic or sapphire sensor covers for scratch resistance and accuracy.
PIN & Card Access:
Temporary PINs improve guest management; ensure NFC cards use encryption to prevent cloning.
Mechanical Key Backup:
Verify keyholes are discreetly positioned and paired with Grade C locks (≥270-minute anti-picking certification).
Lock Cylinder Grade: Mandatory Grade C certification, combined with anti-tamper alarms, thwarts lock-picking and brute-force attacks.
Anti-EMI Protection: Ensure electromagnetic pulse (e.g., Tesla coil) resistance to prevent unauthorized access.
Structural Design: Pair zinc alloy exteriors with internal stainless steel lock bodies for reinforced durability.