Key Features

• True Cordless Lift Control – No exposed cords or chains
• 301 Stainless Steel Constant Force Spring
• Integrated Brake System to prevent sudden drop
• 32mm Tube Compatibility for standard roller blinds
• POM Spring Box Housing for low friction and quiet operation
• Multiple Spring Force Options for different blind weights
• OEM-Friendly Assembly with pre-tension pin locking

Product Overview

The Cordless Lift Control is engineered as an internal mechanical platform
that provides both lifting force and positional stability for roller blinds.
Instead of relying on external cords, the entire load-balancing function
is handled inside the aluminum tube.

Users operate the blind by gently pushing or pulling the bottom rail.
The internal spring stores and releases energy smoothly,
while the brake controls motion and holding position.

System Components

• Spring Box – Core energy storage using a constant force spring
• Brake – Controls speed and prevents free fall
• Shaft – Transfers torque inside the tube
• Circlip – Fixes axial position between components
• Pin – Locks pre-tension during installation

Constant Force Spring Technology

At the heart of the Cordless Lift Control is a constant force spring
manufactured from 301 stainless steel.
The spring strip is wound into a compact spiral,
delivering near-uniform output force throughout the blind’s travel.

Compared with conventional torsion springs,
constant force springs reduce pull-force variation,
improve mid-position stability,
and enhance overall user experience.

Spring Options & Load Matching

The Spring Box is available in five force variants.
The main difference lies in the thickness of the spring strip.

Example: 0.09 × 16 × 2000

• Thickness: 0.09 mm
• Width: 16 mm
• Length: 2000 mm

Thicker springs provide higher lifting force
but allow fewer wraps within the Spring Box,
resulting in a shorter maximum blind drop.

Thinner springs support longer blind heights
with lower lifting force,
making proper selection essential for optimal performance.

Cordless Lift Control Selection Guide

Proper spring selection is critical for achieving balanced operation,
stable holding, and long service life.
The table below provides a general reference for matching spring specifications
to blind weight and drop length.

Note: Spring selection should always consider fabric weight,
bottom rail weight, tube diameter, and target user pull force.
Final validation through prototype testing is recommended.

Integrated Brake System

The Brake is responsible for controlling movement and holding position.
It prevents sudden downward acceleration
and ensures the blind remains stable when released.

The brake does not generate lifting force;
instead, it governs motion within the force range defined by the spring.

Installation & Pre-Tensioning

Before insertion into the aluminum tube,the Cordless Lift Control must be pre-wound to store initial spring energy.

The Pin locks the spring after pre-tensioning,allowing safe handling during assembly.
Once installed, the Pin is removed,and the system becomes fully operational.

Applications

• Residential roller blinds
• Commercial window shading systems
• Child-safe window coverings
• Manual cordless roller blind platforms

Why Choose This Cordless Lift Control

• Designed specifically for OEM roller blind manufacturers
• Reduces safety compliance risk
• Minimizes wear-prone external components
• Supports scalable production with consistent performance

Frequently Asked Questions

1. What type of blinds is this Cordless Lift Control designed for?

This Cordless Lift Control is specifically designed for roller blinds
using a 32mm aluminum tube.
It is not intended for Roman shades, zebra blinds, or venetian blinds.

2. Is this a complete roller blind system?

No. This product is an internal lift mechanism and belongs to the
roller blind accessory category.
Fabric, tube, bottom rail, and brackets are supplied separately by the manufacturer.

3. How does the blind stay in position without cords?

Position holding is achieved through the balance between
the constant force spring inside the Spring Box
and the integrated Brake.
The spring provides lifting force,
while the Brake controls motion and prevents sudden movement.

4. Can one spring model fit all blind sizes?

No. Different blind weights and drop lengths require different spring forces.
Selecting the correct spring thickness is essential
to avoid excessive pull force or insufficient lift.

5. What happens if the spring force is too strong?

An oversized spring may cause the blind to rise too quickly,
increase pull resistance,
or reduce usable drop length due to limited wrap capacity.

6. What happens if the spring force is too weak?

An undersized spring may result in poor lifting performance,
difficulty holding position,
or increased load on the Brake.

7. Why is pre-tensioning required before installation?

Pre-tensioning stores initial energy in the spring,
ensuring balanced operation from the first use.
The Pin temporarily locks the spring during assembly for safety and accuracy.

8. Is this system child-safe?

Yes. The Cordless Lift Control eliminates external cords and chains,
significantly reducing entanglement risks
and supporting modern child-safety requirements.

9. Can this system be used for very wide roller blinds?

Performance on wide blinds depends on proper spring selection,
fabric weight distribution,
and overall system design.
Wide applications may require careful testing and validation.

10. Do you support OEM customization?

Yes. Spring force configuration, component matching,
and packaging can be adjusted to support OEM manufacturing requirements.