Quick Summary
The R32/38 Series Cordless Spring Mechanism is engineered for roller blinds, available in Ø32 and Ø38 compact modules. It delivers hover-at-any-position, smooth/low-noise motion with no bounce or slide. The system is energy-free and child-safe, and supports OEM/ODM torque-curve tuning and headrail/interface adaptation.
Overview of the R Series Cordless Spring Mechanism for Roller Blinds (Ø32 & Ø38)
 |
 |
Redefining Smooth Control
The calibrated cordless spring balances fabric mass and tube inertia for linear motion, crisp stop-points, and zero drift. It eliminates bounce/slide during operation and maintains clean edges on roller blind fabrics.
Application Scenarios
 |
 |
Option 1: Residential
- Bedrooms & Living Rooms: quiet, cordless operation with effortless hover at any height.
- Kitchens & Bathrooms: compact structure fits narrow recesses; components selected for durability.
Option 2: Office & Light-Commercial
- Meeting Rooms: low-noise lift avoids distraction; clean façade for presentations.
- Hotels & Facilities: reliable balance and long service life in high-use environments.
Maintenance and Installation Guide
Installation
- Insert the Ø32 / Ø38 spring module into the roller headrail/tube.
- Align and lock end caps or adapters; verify axial fit.
- Mount fabric assembly; check free rotation and even fabric tracking.
- Test lift/hover/drop to confirm slip-free balance and alignment.
Maintenance Tips
- Keep the headrail interior clean; avoid corrosive vapors.
- On wide/heavy roller fabrics, verify balance periodically; re-tune if needed.
- No lubrication required under normal indoor use.
Ø32 Pipe System Parameters — R Series (Roller Blinds)
Use the following Ø32 table for roller blind selection and quotation.
| Series | Spring Model | Maximum Tension | Itinerary Reference |
|---|---|---|---|
| Roller Blinds C Series | 32LB-07-250 | 250 | 96″–2400 mm |
| Roller Blinds C Series | 32LB-08-300 | 300 | 84″–2130 mm |
| Roller Blinds C Series | 32LB-09-400 | 400 | 72″–1830 mm |
| Roller Blinds C Series | 32LB-10-500 | 500 | 64″–1620 mm |
| Roller Blinds C Series | 32LB-11-600 | 600 | 54″–1370 mm |
Notes: Final selection depends on fabric mass (g/m²), tube diameter, and bottom-rail weight.
Ø38 Pipe System Parameters — R Series (Roller Blinds)
Use the following Ø38 table as provided for roller blinds.
| Series | Spring Model | Maximum Tension | Itinerary Reference |
|---|---|---|---|
| Roller Blinds A Series | 38RB-09-350 | 350 | 112″–2800 mm |
| Roller Blinds A Series | 38RB-10-500 | 500 | 102″–2600 mm |
| Roller Blinds A Series | 38RB-11-600 | 600 | 96″–2400 mm |
| Roller Blinds A Series | 38RB-12-700 | 700 | 96″–2400 mm |
Notes: Match Maximum Tension & itinerary to fabric mass and bottom-rail data; add spring quantity if required.
Engineering Principle
 |
 |
How the Smart Cordless Spring Works
A variable-force spiral spring stores/releases energy to offset fabric weight and tube inertia. Compared with wire-type springs, the variable-force profile provides tunable torque across travel, enabling hover-at-any-position with low noise and reduced wear in roller blind applications.
Key Advantages for Roller Blinds
Safety & UX
- Cordless, child-safe operation—no bead chains or hanging cords.
- Smooth motion without bounce/slide; precise, repeatable hovering.
Efficiency & Reliability
- Energy-free: no battery, wiring, or controller.
- Compact: Ø32 & Ø38 modules fit tight roller headrails.
- Designed for durability and minimal maintenance.
OEM / ODM Integration
- Tuned torque curves for target roller fabric widths/masses.
- Interface adaptation for different roller headrails and mounting profiles.
- Modular housing/parts strategy for regional design norms.
- Outgoing checks on torque stability and assembly accuracy.
Product Testing & Quality Control
Lifecycle & Stability
Validation focuses on repeated lift/lower cycles with tight torque stability across travel.
Component Verification
- Spring characteristics verified for elasticity and fatigue resistance.
- Housing and moving interfaces checked for dimensional stability and wear.
Why Choose DOSRON’s R Series for Roller Blinds
 |
 |
Core Advantages
1. Smart Cordless Operation
Removes chains/cords; hover-anywhere ease of use.
2. Smooth & Silent
Optimized torque curve minimizes noise and eliminates bounce/slide.
3. Long Service Life
Variable-force geometry and protected spring box reduce wear.
4. Compact Precision
Ø32 & Ø38 architectures fit narrow recess applications.
5. Customizable
Torque, interface, and module options for different roller fabrics and regions.
Field Insight
-
In live builds, Ø32 excels in narrow recess retrofits and light-to-medium fabrics, cutting install time thanks to smaller tubes.
-
Ø38 is the workhorse for wider/heavier shades, offering a larger torque envelope and more margin against drift on tall drops.
-
For consistent hand feel across a product line, many OEMs standardize bottom-rail mass and then tune the spring curve instead of altering hardware per SKU.
-
Most assembly issues trace to axial misfit or over-/under-tension. A quick mid-height hover test exposes both—if it creeps, add or remove pre-tension turns before final end-cap lock.
-
To minimize warranty returns, keep a simple selection rule on the shop floor: “choose by fabric mass + drop, then verify with a 30-second hover check.”
FAQ — R Series Smart Cordless Spring for Roller Blinds
Q1: Do Ø32 and Ø38 fit the same roller headrails?
They target different tube/headrail profiles; adapters are available for special profiles.
Q2: What user experience can I expect?
Smooth lift with no bounce or slide, plus hover-at-any-position stability.
Q3: Is it suitable for commercial roller applications?
Yes. Low-noise, durable balance, and compact structure suit offices, hotels, and public facilities.
Q4: How is it different from wire springs?
The variable-force profile offers tunable torque and better stability, improving longevity and reducing maintenance.
Q5: Does the system require power?
No. It is an energy-free mechanical solution—no battery, wiring, or controller.
