Meet Pen-type Actuator HB-DJ 875: Redefining Reliable Actuation in Space-Constrained Applications

Avoiding exposed motor housings and eliminating the need for complex mounting brackets, Hongba Mechatronics’ industrial-grade pen-type linear actuator HB-DJ875 integrates the motor, gearbox, and drive system coaxially into a highly compact unit—redefining reliable motion control where space is at a premium.

RV Pop-Up Roof: The Hidden Support Point Within the Ceiling

RV living embraces freedom—and clever engineering. At the press of a button, the roof gently rises, expanding additional sleeping space. Powering this seamless motion is the HB-DJ875 pen-type actuator, discreetly embedded within the roof frame.

RV roof-lifting mechanisms pose three critical challenges to actuators: extreme spatial constraints, outdoor exposure, and fail-safe operation during power loss. The HB-DJ875 meets these demands with:

• Compact Design: A low-profile cross-section of 65 × 64 mm fits neatly within the roof cavity, preserving interior headroom;
• IP67 Protection + NSS 480h Salt Spray Resistance: Withstands rain, high-pressure car washes, and coastal saline environments;
• Wide Operating Temperature Range (–40°C to +65°C): Performs reliably from alpine nights to desert heat;
• Trapezoidal Screw Drive: Provides inherent 6,000 N self-locking capability, ensuring zero drift and preventing accidental collapse during power failure.

When internal space is pushed to its limits, conventional “L-shaped” actuators—with externally mounted motors—often have nowhere to go. In contrast, the HB-DJ875’s coaxial integration yields a sleek, triangular-prism form factor that fits precisely within tight roof cavities. Its IP67 rating handles water ingress effortlessly, while the –40°C to +65°C thermal design guarantees dependable start-stop performance in extreme climates. Most critically, the trapezoidal screw’s mechanical self-lock securely holds the roof position during outages—eliminating fall risks.

Bank Self-Service Terminals: The Silent Enabler of Intuitive Interaction

In smart banking branches, as a customer approaches a kiosk, the screen automatically lowers to eye level—enabling natural, human-centered interaction within tightly packed counter spaces. Such terminals demand high repeatability, quiet operation, and long-term maintenance-free performance. The HB-DJ875 delivers through:

• Optional Hall Effect Sensor Feedback: Enables precise positioning when paired with a control system;
• Standard Mounting Options (e.g., F01/R02—see selection guide): Allows rapid installation inside vertical columns without custom brackets;
• 20% or 35% Duty Cycle Options: Supports high-frequency usage without overheating;
• Fully Enclosed Design: Prevents dust and foreign object ingress, reducing failure rates.
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Fully concealed within the terminal’s column, it preserves the device’s minimalist aesthetic. Its low-noise operation avoids disrupting the quiet ambiance of the banking hall. Optional Hall sensors and limit signals ensure consistent, repeatable screen positioning. With a 20–35% duty cycle rating, it ensures stable, maintenance-free operation even under frequent use.

Note: The HB-DJ875 does not include a mechanical overload clutch by default and relies on external controller-based protection—making it ideal for integration into intelligent terminal platforms with mature electronic control systems.

Electric Standing Desks: Reliable Support for Healthy Workspaces

Switching from sitting to standing is just one button away. Modern electric height-adjustable desks require actuators that are powerful, quiet, compact, and safe—requirements the HB-DJ875 fulfills with ease:

• 5,000 N Thrust: Easily lifts desktops exceeding 120 kg (including multiple monitors and PCs);
• Trapezoidal Screw Self-Lock: Even during sudden power loss or control failure, the desk remains mechanically locked—meeting stringent safety standards for office furniture;
• Dual-Actuator Synchronization: Standardized connectors (supporting multiple front/rear joint options) ensure smooth, tilt-free lifting;
• 24V DC Power Supply: Compatible with mainstream smart desk control systems—low energy consumption and safe wiring.

Its pen-style cylindrical body hides seamlessly within desk legs, preserving clean aesthetics: function invisible, experience evident. Dual or triple actuators mount side-by-side inside leg cavities, requiring no extra lateral space. With 5,000 N thrust, it effortlessly supports heavy solid-wood tops and multi-screen workstations. The fail-safe self-lock prevents sudden collapse during blackouts. Built to industrial durability standards, it supports thousands of lift cycles.

Conclusion: An Engineering Philosophy of “Focus, Not Compromise”

The HB-DJ875 is a purpose-built solution, not a universal actuator. Its design trade-offs are clear:

• Strengths: Compactness, high ingress protection, wide temperature tolerance, mechanical self-lock safety, and standardized interfaces—making it the optimal choice for space-constrained applications;
• Limitations: No mechanical clutch (relies on electronic control), recommended stroke ≤ 1,000 mm, and high-speed applications require ball screw variants.

These very characteristics make the HB-DJ875 the optimal—not maximal—solution in specialized fields such as RVs, financial kiosks, and smart office systems.