LEECO

LL7 Self-Closing Hinge | LEECO

LEECO’s LL7B self-closing hinge is an torque hinge designed to provide smooth rotation, controlled resistance, and reliable automatic closing performance for lids, covers, panels, and compact enclosures. By combining self-closing functionality with stable torque control, the LL7B series helps keep components securely closed while maintaining smooth and repeatable motion.

Engineered for small display panels, handheld devices, box lids, door lids, office equipment, and industrial enclosures, this self-closing torque hinge is suitable for space-limited applications that require secure closure, compact installation, and controlled motion. With long cycle life, zero backlash, minimal springback, and customizable torque options, the LL7B hinge provides a reliable solution for OEM and ODM product designs.

APPLICATIONS:


- Small display panels
- Handheld devices
- Small box lids
- Door lids and access covers
- Compact enclosures
- Industrial enclosures
- Office equipment
- Medical and electronic devices
 

TORQUE RATINGS:


- Symmetric torque range: 0.4–0.9 Nm
- Static torque can be specified in 0.1 Nm intervals within the available range
- Custom torque options are available to match different lid weights, opening angles, and usage requirements

 

CYCLE LIFE:


- Over 25,000 cycles within ±20% of the static torque specification
 

MATERIALS:


-- Steel and grease
  • Self locking feature
  • 360 degree shaft rotation
  • Plating finish
  • M3.0 or #4 screw mounting hole
  • Zero backlash
  • Minimal or no springback
  • RoHS compliant
  • REACH compliant
  • Customized torque is available
  • Partial design customization on this friction torque hinge is also available

Q:How does a self-closing hinge work?
A:The hinge stores torque internally and automatically returns the lid or cover to the closed position without external power

Q:Is the torque adjustable?
A:Yes. Standard models support preset torque ranges, and custom torque values can be specified to match lid weight and usage frequency.

Q:Is it suitable for fire-rated lids?
A:Yes. The design provides consistent closing to ensure the lid remains securely shut. Please verify local code requirements and use compatible fire-rated hardware.

Q:What lid thickness and weight are supported?
A:Refer to the specification table for recommended lid thickness and routing depth. For heavy-duty or non-standard lid configurations, please contact us for customization options.

Q:Can I customize finish or hole patterns?
A:Yes. We offer partial design customization including finishes, mounting holes, and torque curves for OEM/ODM projects.