1. Product Categories & Core Functions
A. Door Knocker
- A traditional knocking device combining functionality and decorative value
- Common styles: ring-shaped, lion head, modern geometric designs
- Main function: serves as an alternative to doorbells, reducing reliance on electronic devices
B. Door Viewer (Peephole)
- A visual security device installed on doors
- Types include:
- Optical door viewers (wide-angle lens)
- Digital door viewers (screen display with camera)
- Core purpose: identify visitors and enhance home security
2. Materials & Surface Finishing Technologies
- Brass: corrosion-resistant with a premium appearance
- Stainless Steel: high strength and excellent weather resistance
- Zinc Alloy: cost-effective and highly moldable
Surface Finishing Methods:
- PVD Coating: enhances wear resistance and anti-oxidation
- Electroplating: improves shine and surface appearance
- Powder Coating: increases durability and expands color options
3. Security & Optical Technology Advancements
- Wide Viewing Angles (120°–200°): minimize blind spots and improve safety
- Privacy Covers: prevent reverse viewing from outside
- Digital Viewer Features:
Night vision (infrared)
Motion detection
Wi-Fi connectivity (smart home integration)
4. Installation Specifications & Compatibility
- Applicable door thickness: typically 35mm–60mm (adjustable)
- Standard hole diameter: approx. 12mm–16mm for door viewers
- Installation methods:
Door Knockers: screw-fixed or concealed mounting
Door Viewers: internal/external threaded locking system
Key Considerations:
- Compatibility with door materials (wood, metal, fire-rated doors)
- Recommended installation height: 140cm–160cm for optimal viewing
5. Design Trends & Market Demand
- Minimalist Style: matte black finishes and clean lines
- Smart Home Integration: combining viewers with doorbells and surveillance systems
- Decorative Emphasis: door knockers as visual focal points
- Sustainability & Durability: long-lasting materials with low maintenance
6. Key Purchasing & Application Criteria
- Security: viewing angle and anti-peeping features
- Durability: material quality and surface treatment
- Compatibility: door thickness, hole size, and installation type
- Aesthetics: alignment with architectural style
- Functionality: need for digital or smart features