The **FRT-B2-R** is a specific model of a **Rotary Damper** manufactured by **Fuji Latex**. While it is a mechanical component, it is frequently used in the assembly of electronic devices and automotive interiors to provide controlled, smooth motion. --- ### 1. Technical Specifications The FRT-B2-R is part of the "FRT" series, which features a plastic body and a gear-driven mechanism. | Feature | Specification | | :--- | :--- | | **Model Type** | FRT-B2 (R designates Clockwise rotation) | | **Torque Range** | 0.20 ± 0.07 N·m (approximate) | | **Rotation Direction** | Right (Clockwise) | | **Max Rotation Speed** | 50 RPM | | **Operating Temp** | 0°C to 50°C | | **Gear Material** | Polyacetal (POM) | --- ### 2. Core Components and Operation Although it does not contain electrical circuitry, its design is critical for electronic hardware integration: * **Viscous Oil (Silicon Oil):** The internal chamber is filled with high-viscosity silicone oil. The resistance (torque) is generated by the shearing force of this oil as the internal rotor turns. * **One-Way Clutch Mechanism:** The "R" in the model name indicates that the damping force is applied in the **Clockwise** direction. In the counter-clockwise direction, the damper usually offers minimal resistance (freewheeling). * **Gear Interface:** It typically features a small pinion gear that meshes with a linear rack or another circular gear within an electronic chassis. --- ### 3. Common Applications in Electronics The FRT-B2-R is used to provide a "premium feel" and prevent impact damage in the following devices: 1. **Optical Disc Drives:** Ensuring the CD/DVD tray opens smoothly and slowly rather than snapping out. 2. **Control Panels:** Used in flip-down covers for AV receivers or printers. 3. **Automotive Electronics:** Used in glove boxes, ashtrays, and center console lids to provide a luxurious, dampened movement. 4. **Smart Home Hardware:** Slow-closing lids for high-end trash cans or motorized hidden compartments. --- ### 4. Integration Considerations When designing a PCB or a housing for this component: ```yaml Design_Checklist: - Mechanical_Fit: Ensure the gear module matches the rack pitch. - Temperature_Sensitivity: Torque increases in cold and decreases in heat. - Directionality: Verify that "Clockwise" matches the "Closing" or "Opening" action required. - Mounting: Usually snap-fit or screw-mounted to the plastic chassis. ```