- ENGLISH
• Modular
• LoW-SKU
• Easy Assembly
• Stable Force
• Low-Noise Long Lifecycle
• Patent Protect
The L11 Cordless Spring Mechanism combines an L11 Spring Box with 1″ Cord Bases to lift fabric Roman shades from inside the headrail, delivering a smooth, cordless user experience that looks cleaner, feels lighter and helps OEM brands meet modern child-safety expectations.
DOSRON’s spring system components suitable for cordless bamboo Roman blinds are engineered for heavier, more rigid bamboo panels while keeping operation light, quiet, and cord-free. A stainless-steel spiral spring housed in POM balances panel widths from 500–2400 mm and weights up to 6 kg, delivering smooth lift with only 15–25 N operating force at the bottom rail. Optimized torque windows and low-friction guides ensure hold-at-any-position performance with minimal drift and noise levels typically below 40 dB in residential spaces. Each module is validated for ≥20,000 full up-down cycles to support multi-year warranties and demanding hospitality projects. Adapter options allow the same headrail platform to support bamboo Romans together with DOSRON roller, zebra, and honeycomb cordless systems, or to migrate to DT25 cordless tubular motors. For OEM and ODM customers, these spring system components reduce SKUs, simplify global platform planning, and create a consistent cordless user experience across product families.
L4
100pcs
T/T, Credit Card. etc
China
Customized
Xiamen
15 days
Customized
A Spring System for cordless Roman blinds is not just a lift aid—it is a force-balance mechanism designed
to manage cord winding, rotation synchronization, and stable pull-and-stop positioning without exposed operating cords.
Cordless Spring Mechanism engineered for bamboo Roman shades:
constant-force balance, smooth pull-and-stop control, and safer interiors with no external hanging cords.
If you are interested in our solutions, please leave us a message. Let us provide a complete solution tailored to your specific situation.
No. This system is engineered for manual cordless zebra blinds. Hybrid motor-spring platforms use different control logic.
It depends on measured fabric + bottom rail weight and required drop. Use the selection table to choose model and quantity per Shaft.
Pre-winding stores initial energy so the system enters the intended force band immediately. The Pin locks the pre-tension state.
Not reliably. The Spring Box defines the force band; the Brake only governs motion within it. Correct selection comes first.
Yes, but only with proper load calculations to keep force distribution stable across the full travel.
Dosron designs high-performance spring systems and motors for cordless blinds.
Links
Contact US
Address: No. 20-3 Xianghong Road, Xiangan Industrial Zone, Xiangan District, Xiamen, China 361115
E-Mail: Aaron@dosroninc.com
WhatsApp: +86 -18060901517
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