Applications

• Cordless roller shades
• Zebra / sheer shades
• Honeycomb shades
• Roman / Shangri-La
• Residential and light-commercial projects

Send your tube size, fabric weight, and target control protocol. We’ll map the right model and accessories for your roller shades project.

Contact us for sample and pricing or technical support

Product Overview

The 38 mm Type-C Motorized Roller Blinds Motor from DOSRON is engineered for smooth, low-noise motion control and extended durability.
Built with reinforced aluminium housing and high-precision copper windings, it ensures stable torque output (0.7 N·m ± 3 %) and efficient energy use.
Its compact structure fits standard 38 mm aluminium roller tubes, making installation straightforward for OEM or retrofit systems.

Technical Specifications

Key Advantages & Features

Durable Aluminium Structure

Reinforced aluminium shell with internal heat dissipation ensures structural rigidity and long-term durability in daily operation.

Consistent Torque Output

Precision gearbox maintains steady torque for even lifting motion, regardless of shade weight or fabric thickness.

Whisper-Quiet Engineering

Polymer-alloy gears and shock-absorbing mounts keep sound below 40 dB for peaceful indoor environments.

Type-C Fast Charging

Reversible Type-C port enables convenient charging via adapter, solar panel, or power bank; full recharge in 4 hours.

Smart Control Compatibility

Supports RF remote, push-to-start motion, and smart-home integration via Tuya / Zigbee / BLE / Wi-Fi protocols.

Precision Gearbox

High-strength polymer gears with micro-tolerance alignment reduce vibration and noise under high load.

Silent Brake Logic

Electromagnetic brake system ensures smooth start/stop control, protecting shade fabric from tension shock.

Copper Windings

High-purity copper coils enhance electrical efficiency and reduce internal temperature rise.

Aluminium Housing

Lightweight anodized structure provides corrosion resistance and excellent thermal management.

Cycle Testing: Verified for 15 000 + open/close operations.

• Thermal Protection: Automatic cool-down restart after overheating.
• Low-Battery Indicator: Red LED × 2 flashes = charge required.
• Stall Protection: Auto torque cutoff during overload or obstruction.

RF & Cordless Operation

Up to 15 channels (1–15; “A” controls all). LED indicators:
Blue = operation, Red × 2 = low battery, Red/Blue × 3 = pairing success.

Smart-Home Ready

Compatible with Alexa, Google Home, and Apple HomeKit via Tuya or Zigbee gateway modules.

Applications

• Motorized Roller Blinds
• Sheer / Zebra Shades
• Honeycomb / Cellular Shades
• Roman / Shangri-La Blinds
• Residential Smart-Home Windows
• Light-Commercial Building Automation

DOSRON offers full customization for 38 mm motorized shade systems, including:

• Private labeling & branding support
• Custom housing color or logo printing
• Mechanical interface modification for tube sizes
• Engineering support & installer training

In OEM projects across Europe and North America, failure rate dropped by 40 % and user satisfaction rose by 25 %.
Integrators highlight stable torque, quieter operation, and improved setup time with Type-C charging compatibility.

FAQ

1.Introduction

The cordless curtain spring-driven motor is an innovative curtain driving device specially designed for modern homes and commercial spaces. It abandons the rope design of traditional curtains and adopts advanced spring-driven technology to realize cordless intelligent control of curtains, bringing users a safer, more convenient and beautiful experience. It can be easily adapted to various places such as family bedrooms, living rooms, offices, hotels, etc., making the opening and closing of curtains more efficient and full of a sense of technology, and redefining people’s perception of curtain operation.

2. Specifications/Technical parameters/Technical Data

Driving method: Spring-driven, no external power supply required, curtain opening and closing is realized by spring energy storage

Adaptable curtain types: Common material curtains such as fabric curtains and yarn curtains

Remarks:Installation method: Adaptable to various curtain rails, supporting side mounting and top mounting

3. Product detail

• The cordless curtain spring-driven motor has an overall simple and compact design. The shell is treated with a frosted process, which not only has a delicate feel, but also can effectively prevent scratches and maintain a long-term beautiful appearance. The motor is equipped with precision spring components and transmission structure inside to ensure stable and uniform power output. Its core components have undergone strict screening and testing to ensure that they are not prone to failure during long-term use.
• The connection part between the motor and the curtain rail adopts a snap-on design, which is easy to install. No complicated tools or professional skills are required, and users can operate it by themselves. At the same time, the motor is equipped with a precise stroke control device, which can set the opening and closing position according to the actual size of the curtain to avoid excessive stretching or contraction.
• In addition, the surface of the motor is equipped with simple operation buttons with clear signs, which is convenient for users to manually control the opening and closing of the curtain; some models also support remote control function, which can be easily operated through the supporting remote control, improving the convenience of use.

4. Features/Equipment characteristics

• Cordless design: Completely get rid of the ropes of traditional curtains, eliminate the safety hazard of children and pets being entangled by ropes, and make the home environment safer.
• Spring-driven: No need to rely on electricity, energy-saving and environmental protection. It can be used normally even in special situations such as power outages, and is applicable to a wider range of scenarios.
• Mute operation: The internal transmission structure is optimized, and the noise during operation is extremely low, ≤30 decibels, which will not interfere with daily life and work.
• Precise control: Equipped with precise stroke positioning function, which can accurately stay at the set opening and closing position to ensure the neatness and beauty of the curtain.
• Flexible installation: Adaptable to various common types of curtain rails, with various installation methods. Side mounting or top mounting can be selected according to actual needs to meet different decoration styles.
• Strong durability: Using high-quality materials and precision manufacturing technology, the spring has a long service life, can withstand tens of thousands of telescopic cycles, and reduces the frequency of replacement.

5. Our Advantages

• Leading technology: We have independently developed core spring-driven technology. After years of technical accumulation and continuous innovation, the product performance is in a leading position in the industry.
• Quality assurance: There is a strict quality control system in every link from raw material procurement to production and processing to ensure that each motor meets high-quality requirements.
• Customized service: We can provide personalized product customization services according to customers’ special needs, such as curtain size, load-bearing requirements, etc., to meet the needs of different scenarios.
• Price advantage: By optimizing the production process and reducing production costs, we provide customers with more competitive prices on the premise of ensuring product quality, with higher cost performance.
• Professional team: We have a professional team composed of senior engineers and technical personnel, who can provide customers with timely and professional technical support and solutions.

6. After-sales service

• Warranty period: The product provides a 2-year free warranty service from the date of purchase. During the warranty period, if the product breaks down due to its own quality problems, free repair or replacement services can be enjoyed.
• After-sales response: A professional after-sales customer service team is set up to provide 7×24-hour online consultation service. Customers can contact us by phone, email, etc. at any time when they encounter problems, and customer service personnel will respond within 2 hours.
• Maintenance service: For products beyond the warranty period, paid maintenance services are provided, with reasonable maintenance fees and component costs charged to ensure that customers’ products can be repaired in time.
• Regular return visits: Regular return visits are made to customers who have purchased products to understand the use of products, provide maintenance suggestions and use skills, and improve customers’ use experience.
• Return and exchange policy: If the product is not installed and does not affect secondary sales, customers can apply for return or exchange within 7 days after receiving the product, and we will bear the round-trip freight.

7. Experience and markets

Since the product was launched, we have accumulated rich market experience with high-quality products and perfect services. The products are widely used in family residences, hotels, office buildings, schools, hospitals and other fields, and have been recognized and praised by many customers.

At present, our products not only occupy a certain share in the domestic market, but also are exported to many countries and regions in Europe, America, Southeast Asia, the Middle East, etc., and have established a good brand image in the international market. Years of market operation have enabled us to deeply understand the needs and usage habits of customers in different regions, and better provide suitable products and services for global customers.

8. QUALITY ASSURANCCE/Testing standard

We attach great importance to product quality and have established a strict quality assurance system. All products have undergone a number of strict tests to ensure their stable performance, safety and reliability.

Testing items include:

• Life test: The spring is tested for tens of thousands of telescopic cycles to ensure that its service life meets the standard.
• Load-bearing test: Multiple load operation tests are carried out within the maximum load range to test the bearing capacity and operation stability of the motor.
• High and low temperature test: The motor is placed in an environment of -10℃-50℃ for long-term operation test to verify its working performance under different temperature conditions.
• Noise test: The noise value of the motor during operation is tested in a professional soundproof environment to ensure that it meets the mute standard.
• Safety test: Safety tests are carried out on the shell strength of the motor and electrical performance (for models with remote control function) to ensure the safety of users.

9. Testing standard

The testing standards of the product strictly follow the relevant national industry standards and international general standards, such as:

In line with GB/T 34436-2017 “Household and similar curtain driving devices” standard

Follow IEC 60335-1 “Safety of household and similar electrical appliances Part 1: General requirements” standard

Meet the RoHS environmental protection standard to ensure that the content of harmful substances in product materials meets the specified requirements

By strictly testing in accordance with these standards, the quality and safety of products meet the requirements of domestic and foreign markets.

10. FAQ(Spring Loaded Motor For Cordless shades)

Q1: Is this cordless curtain spring-driven motor troublesome to install? Do I need professional personnel to install it?

A1: The installation is very simple. The motor adopts a snap-on design and is equipped with a detailed installation manual. Users only need to follow the steps in the manual, no professional tools or skills are required, and they can easily complete the installation by themselves.

Q2: Will the spring force decrease after using for a period of time? Can the spring be replaced?

A2: Our springs are made of high-quality materials and treated specially, with long-lasting and stable elasticity. Under normal use, it is not easy to have the problem of decreased elasticity. If the spring needs to be replaced after long-term use, we provide corresponding parts and replacement guidance, and users can replace it by themselves or contact after-sales personnel for assistance.

Q3: What types of curtain rails does the motor support?

A3: This motor is suitable for various common curtain rails on the market, such as straight rails and curved rails. Both aluminum alloy rails and plastic rails can be installed and used normally as long as the size matches.

Q4: Can the curtain be pulled manually without a power supply?

A4: Yes. When there is no electricity (for models with remote control function) or manual operation is needed, users can directly pull the curtain. The internal structure design of the motor will not hinder the manual pulling of the curtain, and the operation is light.

Q5: The load-bearing range of the product is 5kg-10kg. What if the curtain weight exceeds 10kg?

A5: If the curtain weight exceeds 10kg, we can provide you with customized services. We will customize a motor model with higher load-bearing capacity according to the actual weight of the curtain to meet your needs.

11. Working principle

The working principle of the cordless curtain spring-driven motor is based on the energy storage and release of the spring. When the user manually opens or closes the curtain, the spring in the motor will be stretched or compressed accordingly, storing a certain amount of elastic potential energy.

When automatic operation is needed, by operating the button on the motor or the remote control (for models with remote control function), the control device will trigger the spring release mechanism. The elastic potential energy stored in the spring is converted into kinetic energy, which drives the transmission structure to operate, so as to realize the automatic opening and closing of the curtain.

At the same time, the stroke control device inside the motor will monitor the position of the curtain in real time. When the curtain reaches the set opening and closing position, it will automatically stop running to ensure the precise positioning of the curtain. This spring-driven method does not require an external power supply, realizing cordless and energy-saving operation.

12. Packaging & Delivery

Packaging: Environmentally friendly carton packaging is used, with a foam buffer structure inside, which can effectively protect the motor from damage during transportation. The package includes the motor main body, installation accessories (buckle, screw, etc.), user manual, warranty card and other items.

Transportation method: According to the customer’s location and order quantity, select an appropriate transportation method, such as express delivery, logistics, etc. For domestic orders, express delivery is generally used, and it can be delivered within 3-7 days; for international orders, international logistics transportation will be used, and the specific delivery time depends on the destination country and region.

Delivery time: Conventional models are in sufficient stock and can be shipped within 24 hours after ordering; for customized products, the delivery time is generally 7-15 days according to the complexity of customization requirements.

Electric tubular motors are revolutionizing the way we control window coverings, and our models specifically designed for cordless spring mechanism roller blinds represent the pinnacle of this innovation. These motors are engineered to provide automated, wireless operation for roller blinds, eliminating the need for manual pulling or cords. Ideal for residential and commercial settings, they integrate seamlessly into modern smart home systems, offering users unparalleled convenience, safety, and energy efficiency.

The core purpose of these motors is to transform traditional roller blinds into intelligent, automated solutions. By utilizing a tubular design that fits snugly into the blind’s roller tube, they enable smooth, quiet adjustments with just a tap on a remote or smartphone app. This product targets homeowners, office managers, and smart home enthusiasts who seek to enhance their space’s aesthetics while reducing daily hassles. With the growing demand for eco-friendly and child-safe options, our electric tubular motors for cordless spring mechanism roller blinds stand out as a reliable choice, combining advanced technology with user-friendly design.

Key Characteristics of Electric tubular motors for cordless Spring Mechanism Roller Blinds

The features of our electric tubular motors delve into the technical and design aspects that set them apart. Each feature is engineered for durability, efficiency, and ease of use:

Tubular Design: With a standard diameter of 38mm, this motor fit perfectly into most roller blind tubes, ensuring a discreet and aesthetic installation. The slim profile doesn’t compromise on strength, thanks to high-grade aluminum construction.

Torque and Speed: Offering torque ranges from 10 N/m to 30 N/m, these motors handle various blind sizes and weights effortlessly. Operational speed is adjustable, with typical cycles of 10-20 seconds for full open/close motions.

Energy Efficiency: Consume as little as 2-5 watts per operation, contributing to lower electricity bills. Battery models use lithium-ion technology for long-lasting performance and eco-friendliness.

Installation Ease: Designed for DIY or professional installation, with clear manuals and mounting accessories included. The cordless mechanism means no messy wires, reducing setup time to under an hour.

Customization Options: Users can adjust limits and settings via app interfaces, ensuring precise control over blind positions. This is particularly useful for irregular window shapes.

Comparison Table

Application of the Cordless Spring-Driven Fabric Roman Blinds System

Electric tubular motors transform standard cordless roller blinds into intelligent, automated window treatments. By retrofitting directly into the existing roller tube, they unlock a new level of convenience, safety, and efficiency across a wide spectrum of environments. Below are the key application areas where this technology delivers exceptional value.

 1. Residential & Smart Homes: The Epicenter of Comfort and Convenience

In modern homes, these motors are the cornerstone of automated living, offering seamless control over light and privacy.

   Living Rooms & Home Theaters:

   Application: Create the perfect ambiance for any occasion. Program blinds to lower with a single button for movie nights or set them to rise gradually in the morning with the alarm.

   Benefit: Enhents the entertainment experience by eliminating glare on screens and provides instant privacy without interrupting the moment.

   Kitchens & Dining Areas:

   Application: Control light and glare during meal preparation or dining. Easily adjust blinds to block the harsh afternoon sun while cooking.

   Benefit: Hands-free operation is ideal when hands are dirty or full, enhancing hygiene and convenience.

   Patio Doors & High/Hard-to-Reach Windows:

   Application: Automate large or inaccessible windows where manual operation is cumbersome or dangerous.

   Benefit: Eliminates the need for step-ladders or straining to reach blind chains, significantly improving safety and ease of use.

 2. Commercial Offices: Boosting Productivity and Professionalism

In the workplace, automated blinds contribute to employee well-being, energy management, and a polished corporate image.

 3. Hospitality Sector: Elevating the Guest Experience

Hotels and resorts use this technology to enhance guest comfort, privacy, and the overall perception of quality.

 4. Healthcare & Wellness Facilities: Prioritizing Safety and Hygiene

In sensitive environments, the benefits of automation and cordless design are particularly impactful.

   Patient Rooms:

   Application: Enable bedridden patients to control their environment without nurse assistance. The quiet operation ensures a restful atmosphere.

   Benefit: Promotes patient independence and well-being. The cordless design is crucial for infection control, as there are no cords or chains to harbor germs.

   Clinics & Meditation Rooms:

   Application: Ensure instant, quiet privacy for consultations or create a serene environment for therapy and relaxation.

   Benefit: Supports a calm, hygienic, and controlled environment.

 5. Educational & Public Institutions

Schools and libraries benefit from the practical advantages of automated light control.

   Classrooms & Libraries:

   Application: Teachers or librarians can control all blinds simultaneously to eliminate glare on smart boards or computer screens without disrupting the class.

   Benefit: Improves the learning environment and saves time. The cordless design is a critical safety feature, preventing tampering or accidents involving cords.

 6. Specialized Applications

   Skylights & Roof Windows:

   Application: This is the quintessential application for tubular motors. Automating blinds on hard-to-reach skylights is not a luxury but a necessity.

   Benefit: Provides effortless control over light and heat gain from the sun, significantly improving energy efficiency and comfort.

FAQ:

Q1: What is a cordless spring system for roller blinds?  

A1: A cordless spring system is a mechanism that allows you to operate roller blinds without using cords. It relies on an internal spring to enable smooth raising and lowering of the blinds through gentle pushing or pulling motions. This design enhances safety and convenience.

Q2: Is the cordless spring system safe for children and pets?  

A2: Yes, it is highly safe. By eliminating cords, it removes the risk of entanglement or strangulation, making it an excellent choice for households with young children or pets. Many models include additional locking features for extra security.

Q3: Can I install the cordless spring system myself?  

A3: Absolutely. The system is designed for easy DIY installation. It typically comes with clear instructions and standard mounting hardware. However, for large or custom blinds, consulting a professional might ensure optimal performance.

Q4: How durable is the spring mechanism?  

A4: The spring mechanism is built from high-quality materials like reinforced steel, ensuring long-term durability. It can withstand frequent use and is resistant to corrosion, often lasting for years without issues.

Q5: Will this system work with my existing roller blinds?  

A5: In most cases, yes. The cordless spring system is compatible with a wide range of roller blind types and sizes. Check the product specifications for weight and width limits to ensure compatibility with your blinds.

Q6: What maintenance does the system require?  

A6: Minimal maintenance is needed. Occasional cleaning of the components with a dry cloth is sufficient. The springs are self-lubricating and do not require regular adjustments.

Q7: Can I use the cordless system for large windows?  

A7: Yes, but it depends on the blind’s weight and size. The system is adjustable to handle different loads. For very large blinds, consider consulting the manufacturer for specific recommendations.

Q8: How does the cordless system compare to motorized blinds?  

A8: The cordless spring system is a manual alternative that offers similar safety benefits but at a lower cost. Motorized blinds provide automation but are more expensive and complex to install. The cordless system is ideal for those seeking simplicity and affordability.

Q9: Are there any energy efficiency benefits?  

A9: Yes, by allowing precise control over blind positions, the system helps insulate rooms, reducing energy costs. When fully closed, it creates a tight seal that minimizes heat transfer.

Q10: Where can I purchase this product?  

A10: The cordless spring system is available through home improvement stores, online retailers, and specialized blind suppliers. Always buy from reputable sources to guarantee quality.

Company Profile:

Xiamen Dosron Technology Co., Ltd was founded in 2014, is located in the beautiful coastal city of Xiamen. It is a high-tech enterprise specializing in the research, development, manufacturing and sales of intelligent motors and control systems for windows.

We have a team of 126 professionals dedicated to providing customers with innovative, efficient and reliable motorized curtain lifting system solutions. Our main products include motorized roller shades motor, cordless roller shades spring system, intelligent control switches and remote controls. These products, with their intelligent and lot characteristics, meet the pursuit of convenience, safety and comfort in modern homes. Through continuous technological innovation and R&D investment, our products have been widely used in smart homes, commercial buildings and public facilities.

Xiamen Dosron Technology Co., Ltd. has a wide range of customers, including curtain manufacturers, wholesalers and smart home brands. Our products and solutions have won recognition in domestic and foreign markets, and have established solid cooperative relationships with many well-known companies, including DRAPER, ALDI, Walmart, Target and National Geographic. We will promote the development of the smart home industry through continuous technological innovation and excellent customer service, and create a more intelligent and comfortable living experience for users. Friends from all walks of life are welcome to visit our company for guidance. We look forward to working with you to create a better future.

If you need any further changes or assistance, let me know!

Please reach us through below information: 

Email: Aaron@dosron.cn 

WhatsApp: 86-180 6090 1517