Heavy-Duty 2.8kg Sofa Storage Lift Up Spring Hinge Mechanisms (BLS-1115)
Sofa storage lift up spring hinge mechanisms are heavy-duty cantilever linkage hardware assemblies powered by high-tension extension springs designed to lift and support heavy upholstered sofa seats, chaise cushions, and ottoman lids for easy under-seat storage access. Manufactured by BLS Hardware using 2.8kg structural cold-rolled steel plates and fatigue-tested manganese springs, the BLS-1115 series provides smooth counterbalance lifting, wide opening angles, and long-term durability for modular furniture factories worldwide.
Key Features & Engineering Benefits
- Effortless Spring-Assisted Counterbalance: Dual heavy-duty 65Mn coil springs counterbalance the cushion weight, allowing users to lift heavy sectional chaise tops smoothly with one hand.
- Heavy-Duty 2.8kg Structural Carbon Steel: Stamped from thickened cold-rolled steel linkage bars with solid reinforced pivot rivets, supporting dynamic lifting forces without bending or twisting.
- Wide Opening Angle for Maximum Storage Access: Engineered linkage geometry elevates the seat cushion high and forward, providing full, unobstructed access to under-bed storage compartments.
- Industrial Matte Black Powder Coating: Electrostatically applied powder coat protects the linkage arms and springs from moisture, scratches, and rust in residential or hotel environments.
- Pre-Punched Multi-Hole Mounting Plates: Flanged side brackets feature standardized countersunk screw holes for rapid, secure fastening directly into wooden framing rails.
- Safe Open-Position Hold: Sturdy cantilever geometry holds the elevated cushion securely in the open position without sudden dropping, ensuring user safety during loading.
Technical Specifications
| Product Name | Sofa Storage Lift Up Spring Hinge Mechanisms |
|---|---|
| SKU / Model Number | BLS-1115 |
| Brand / Manufacturer | BLS Hardware (blshardware.com) |
| Solid Product Weight | 2.8 kg / pair (Industrial Heavy-Duty Build) |
| Material Grade | Heavy-Gauge Cold-Rolled Carbon Steel (Q235) + 65Mn Manganese Springs |
| Mechanism Configuration | 1 Pair (Left + Right Hinges) + 2 Heavy-Duty Coil Springs |
| Surface Treatment | Industrial Matte Black Powder Coating (Electro-Galvanized Zinc optional) |
| Applications | Sectional Chaise Lounges, Ottoman Storage Beds, Pull-Out Daybeds, RV Under-Bed Storage Boxes |
How to Install Sofa Storage Lift Up Mechanisms
- Symmetrical Chassis Mounting: Mount the bottom straight flanged rails securely along the inner wooden side walls of the sofa base box.
- Top Frame Fastening: Align and screw the upper articulated linkage arm to the bottom frame of the lift-up chaise cushion or mattress board.
- Spring Attachment: Hook the dual 65Mn heavy-duty coil springs onto the dedicated retention pins on each hinge arm to engage the counterbalance lift force.
Wholesale, Custom Spring Tensions & Factory Direct Sourcing
BLS Hardware is a certified functional sofa hardware factory supplying furniture manufacturers and distributors globally:
- Custom Spring Strengths & Arm Lengths: We calibrate custom spring wire gauges and manufacture custom arm lengths to match light foam or heavy solid-wood chaise cushions.
- Fatigue Life Tested: Exceeds 20,000 continuous opening and closing cycles under full weight load.
- Direct Contact & Fast Factory Quotation:
📱 WhatsApp: +86 138 2752 1875
✉️ Email: ZK-ZhengKai@outlook.com
🌐 Official Website: https://blshardware.com/
Frequently Asked Questions (FAQ)
Q1: Why choose dual coil springs over gas struts for chaise lounge storage?
A: Heavy-duty 65Mn coil springs provide immediate, mechanical lifting assistance without the risk of gas pressure leakage or temperature-induced stiffness over long-term residential use.
Q2: Is the 2.8kg/pair build strong enough for heavy leather chaise cushions?
A: Yes. Stamped from thickened structural steel with solid pivot pins, the BLS-1115 mechanism easily lifts and supports heavy multi-layer foam and solid wood framed chaise tops.
Q3: What is the MOQ and sample lead time for wholesale orders?
A: Standard MOQ is 300 pairs. Free evaluation sample kits are available and dispatch within 1–2 business days.
