ENGINEERING STRUCTURAL BREAKDOWN

Spring System Works in Real Operation
NOTE
  •  ANSI/WCMA A100.1(U.S. Window Covering Safety Standard)
  • CPSC 16 CFR 1260(U.S. Federal Mandatory Cordless Rule)
  • EN 13120(European Child Safety Standard for Window Coverings)
  • AS/NZS 60335.2.97(Australia & New Zealand Safety Standard for Motorized Blinds)

At DOSRON, our cordless systems are engineered to eliminate exposed cords and hazardous loops — reducing strangulation risks at the source. Every architecture is developed in alignment with key global child-safety standards:

  • ANSI/WCMA A100.1(U.S. Window Covering Safety Standard)
  • CPSC 16 CFR 1260(U.S. Federal Mandatory Cordless Rule)
  • EN 13120(European Child Safety Standard for Window Coverings)
  • AS/NZS 60335.2.97(Australia & New Zealand Safety Standard for Motorized Blinds)

Because protecting children is not a feature upgrade.It is the starting point of responsible engineering.

 What is the Cordless Spring Driven Fabric Roman Blinds System ?

  The Flat-Mount Cordless Spring System applied to fabric Roman blinds represents a revolutionary leap in window treatment technology. Designed for the modern homeowner seeking a blend of sophistication, safety, and unparalleled convenience, this system redefines how you interact with your windows. Unlike traditional Roman shades with cumbersome cords, our innovative cordless spring mechanism offers a sleek, clean aesthetic and a hassle-free operation.

  Crafted for seamless integration into any interior decorate,these fabric Roman blinds provide a perfect finishing touch to your living spaces, bedrooms, or offices. The core of this product is its unique flat-mount, cordless spring system, which ensures smooth, quiet, and effortless adjustment of your blinds with just a gentle push or pull. This design not only enhances the visual appeal of your windows by eliminating unsightly cords but also addresses critical safety concerns, making it an ideal choice for families with children and pets.

  Embrace the future of home design with a product that prioritizes user experience, aesthetic integrity, and intelligent functionality.

 

The Flat-Mount Cordless Spring System for Fabric Roman Blinds | Dosron

 

 

Comparison: Cordless Spring System vs Traditional Corded Roman Blinds

Feature

Our Cordless Spring System Roman Blinds

Traditional Corded Roman Blinds

Safety

Excellent. No cords; inherently child- and pet-safe

Poor. Looped cords pose a significant strangulation hazard

Aesthetics

Sleek and Modern. Clean, cord-free look; sits flush to the wall

Cluttered. Visible cords and cleats disrupt the clean line of the window

Ease of Use

Effortless. Simple push-pull operation, ideal for all users and hard-to-reach windows

Cumbersome. Requires pulling and securing cords, which can be difficult for some

Durability

High. Protected internal mechanism; no cords to snap or tangle

Moderate. Cords are susceptible to wear, fraying, and breaking over time

Maintenance

Easy. Simple to dust and clean; no cords to maintain

harder. Cords require regular cleaning and can become tangled

Price

Slightly higher initial investment due to advanced mechanism

Generally lower initial cost

Overall Value

Superior. Offers enhanced safety, convenience, and modern design, justifying the investment

Lower. Poses safety risks and offers less convenience

Key Characteristics of Cordless Spring Driven Roman Blind System

  The Flat-Mount Cordless Spring System is engineered for intuitive operation and superior performance. Here’s how it works and what it offers:

  •   Cordless Spring Mechanism: At the heart of these blinds is a robust internal spring system. To lower the blind, simply grasp the bottom rail and pull it down to your desired position. To raise it, lightly pull the bottom rail and release—the spring mechanism will smoothly and quietly retract the fabric into neat, consistent folds.
  •   Flat-Mount Design: The system is designed to sit flush against the window frame or wall, providing a clean, streamlined look that complements modern architecture and minimizes dust collection on top of the blind.
  •   Premium Fabric Selection: Our Roman blinds are available in a wide range of high-quality fabrics, from light-filtering to room-darkening options, allowing you to control light and privacy with ease.
  •   Custom Fit: Available in a variety of sizes to ensure a perfect fit for your windows, enhancing both functionality and aesthetic appeal.
  •   Safety Compliant: As a completely cordless design, it inherently meets the highest standards of child and pet safety, eliminating the danger of strangulation posed by traditional corded window coverings.

How to Choose the Appropriate Spring Box Model Accessories

L4/L5 Loading Capacity Reference Table Roman Blind

Name Spring Specification L4/L5Spring box0R+V4-2.0Cord base0R L4/L5Spring box0.5R+V4-2.0Cord base0R L4/L5Spring box0R+V4-2.0Cord base0.5R L4/L5Spring box0.5R+V4-2.0Cord base0.5R
Maximum bear weight/g Minimum  Down rail weight/g Maximum bear weight/g Minimum  Down rail weight/g Maximum bear weight/g Minimum  Down rail weight/g Maximum bear weight/g Minimum  Down rail weight/g
L4-2 0.1 850 250 1050 200 1250 150 1550 100
0.11 950 250 1200 200 1400 150 1700 100
0.12 1150 300 1350 300 1700 200 2050 150
0.13 1350 400 1650 350 1950 250 2350 200
0.14 1650 550 1950 500 2350 300 2900 250
0.15 1750 600 2100 550 2600 350 3150 300
L4-3 0.1 1150 125 1450 100 1900 25
0.11 1325 125 1625 100 2075 25
0.12 1450 300 1975 150 2500 75
0.13 1800 275 2250 175 2850 100
0.14 2100 425 2700 175 3525 100
0.15 2275 475 3025 225 3850 150
L4-4 0.1 1250 100
0.11 1450 100
0.12 1550 300
0.13 1950 250
0.14 2250 400
0.15 2450 450
L5-2 0.1 1900 450 2100 400 2400 350
0.11 2150 450 2350 400<

Capacity & Drop

R32 spring box Capacity & Drop

Spring Box PN.

Maximum Capacity /g

Support Maximum Drop /inch

Support Maximum Drop /cm

0.07*16*2000

   

0.08*16*2000

   

0.09*16*2000

   

0.10*16*2000

   

0.11*16*2000

   

 

R38 spring box Capacity & Drop

Spring Box PN.

Maximum Capacity /g

Support Maximum Drop /inch

Support Maximum Drop /cm

0.09*16*2000

   

0.10*16*2000

   

0.11*16*2000

   

0.12*16*2000

   

Why Us?

This will help you understand the differences between our products and those currently on the market.

Item

Electric tubular motors for cordless Spring Mechanism Roller BlindVSElectric tubular motors for cordless Spring Mechanism Roller BlindVSElectric tubular motors for cordless Spring Mechanism Roller Blind

Stablity

   

Force compensate

   

Assembly Safety

   

SKU

   

Lifecycle

   

Cost

   

Operation

   

Patents & Certifications

We design and manufacture cordless spring mechanisms and tubular motors for roller shades, honeycomb shades, zebrablinds, and venetian blinds,roman shades and more. Trusted by top international brands, DOSRON delivers scalableOEM/ODM solutions worldwide.

Get in touch

If you are interested in our solutions, please leave us a message. Let us provide a complete solution tailored to your specific situation.

Frequently Asked Question about Dosron

Q1: Is this Cordless Spring Drive suitable for motorized zebra blinds?

No. This system is engineered for manual cordless zebra blinds. Hybrid motor-spring platforms use different control logic.

Q2: How many Spring Boxes should I use?

It depends on measured fabric + bottom rail weight and required drop. Use the selection table to choose model and quantity per Shaft.

Q3: Why is pre-winding required before installation?

Pre-winding stores initial energy so the system enters the intended force band immediately. The Pin locks the pre-tension state.

Q4: Can a stronger Brake solve drift if the spring is mismatched?

Not reliably. The Spring Box defines the force band; the Brake only governs motion within it. Correct selection comes first.

Q5: Can different Spring Box models be mixed on one Shaft?

Yes, but only with proper load calculations to keep force distribution stable across the full travel.

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