- ENGLISH
• Modular
• LoW-SKU
• Easy Assembly
• Stable Force
• Low-Noise Long Lifecycle
• Patent Protect
The DOSRON R38 Spring Loaded Mechanism is a high-capacity in-tube spring system engineered for 38 mm cordless roller blinds and zebra blinds. Using dedicated 38RB and 38ZB spring variants, it delivers stable torque, smooth lifting, and quiet operation even with heavier fabrics and wide window spans. Its unified 38 mm platform allows OEM brands to support both manual cordless and motor-ready designs with minimal engineering changes, making it an ideal foundation for modern residential and commercial blind programs.
The R38 Spring Assisted Cordless Lift System for roller shades provides smooth, quiet operation with no cords. Ideal for 38mm tubes, this child-safe, durable system offers effortless lifting, ensuring convenience and safety for residential and commercial spaces.
This product detail explains how the DOSRON Dual-Mode Motorization Kit upgrades classic cordless spring-lift roller blinds into smart-ready systems. It details the in-tube motor and spring layout, compares 32 mm and 38 mm configurations, and outlines installation, safety and acoustic benefits so OEM brands can design quiet, child-safe blinds with both manual and motorized control in one platform.
The Spring Motor Roller Blinds Control System from DOSRON integrates a 38 mm spring-assist core with a compact drive to deliver smooth, quiet, and cordless operation. A 301 stainless steel spiral spring and POM housing stabilize torque for reliable hold-at-any-position performance, while the motor enables precise up/stop/down scenes with minimal power draw. The modular design fits roller and zebra headrails, reduces wiring complexity, and lowers lifecycle maintenance. Ideal for bedrooms, offices, and hospitality spaces, this system combines child-safe architecture with OEM/ODM adaptability—supporting variable fabric masses, bottom-rail options, and regional specifications for modern, high-quality interiors.
DOSRON’s R32 Cordless Spring Mechanism is a compact Ø32 solution for roller shades and zebra blinds. Using POM engineering plastic, zinc-alloy die castings and a 301 stainless-steel spiral spring, it delivers smooth hover-anywhere motion, low noise and long cycle life. The modular design supports OEM / ODM torque tuning, fits narrow cassettes, and helps brands offer child-safe, energy-free cordless blinds.
The DOSRON 38mm Quiet Smooth Cordless Spring Mechanism delivers exceptional balance, silence, and reliability. Engineered for roller blinds and office shading systems, it ensures stable torque, smooth lifting, and low-noise performance through its precision-balanced spring structure. Built for modern commercial and residential interiors, this cordless mechanism offers effortless operation, enhanced safety, and long-term durability — making it the ideal solution for noise-sensitive and high-efficiency environments.
1. Cordless, manual operation, safe, convenient
2. energy saving, environmental protection, quiet.
3. Free hovering and stopping at any position at will.
4. Smooth hand feeling
Item No :
32mm
Order(MOQ) :
100pcs
Payment :
T/T, Credit Card, etc
Product Origin :
China
Color :
Customized
Shipping Port :
Xiamen
Lead Time :
30 days
Weight :
Customized
R38 Customized Cordless Spring Systems are engineered for zebra and cellular blinds to deliver smooth, balanced, ultra-quiet lifting with a fully cordless design. Using a precision spiral spring inside a durable POM housing with a 301 stainless-steel spring, the R38 platform maintains consistent torque and long service life across daily cycles. The result is a maintenance-free, energy-efficient mechanism that keeps stripes aligned, improves safety, and integrates cleanly into modern headrails. Choose R38 Customized Manual Spring Systems when you need OEM-tunable torque curves, reliable hovering, and premium interior aesthetics.
The DOSRON R Series Cordless Spring Mechanism for Roller Blinds, available in Ø32 and Ø38 modules, uses a precision-engineered spiral spring to deliver smooth, balanced, and silent lifting—without external cords. A durable POM housing and 301 stainless-steel spring ensure consistent torque, long cycle life, and reliable hovering across light-to-heavy roller fabrics. Child-safe, maintenance-free, and energy-efficient, this compact mechanism preserves clean façades while elevating usability and aesthetics in modern residential and light-commercial roller shade systems.
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.
Our Power Spring Driven Roller Shutter Control System represents a significant breakthrough in roller shutter technology. This intelligent system is designed for homes and businesses seeking the perfect combination of reliability, energy efficiency, and ease of use. By integrating a precision spring driven mechanism with smart control technology, our system delivers unparalleled performance in operating heavy shutters without requiring continuous power supply. Whether for security protection, light control, or privacy management, this system provides an exceptional solution.
Order(MOQ) :
100pcs
Payment :
T/T, Credit Card. etc
Product Origin :
China
Color :
Customized
Shipping Port :
Xiamen
Lead Time :
15 days
Weight :
Customized
Welcome to the future of window styling – where unparalleled safety meets minimalist design. Our Cordless Zebra Blinds with the Easy Lift Spring System are engineered for the modern home. Say goodbye to tangled cords and complicated mechanisms. This is not just a window covering; it’s a smart, sophisticated solution that offers effortless control over your home’s light and privacy. Designed with families in mind, this blind eliminates hazardous cords, providing peace of mind without compromising on style or functionality. Experience the seamless operation and sleek look that will transform any room into a safer, more beautiful space.
38mm
100pcs
T/T, Credit Card. etc
China
Customized
Xiamen
15 days
Customized
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.
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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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