The **FRT-30-R** is an electronic component primarily classified as a **Rotary Damper**. These parts are mechanical-electronic interfaces used to control the speed and smoothness of motion in lids, drawers, and rotating mechanisms. --- ## 1. Technical Specifications The "FRT-30-R" typically follows the naming convention of manufacturers like **Fuji Latex**. Below are the core technical parameters: | Property | Description | | :--- | :--- | | **Type** | Partial Rotation / Vane Type Damper | | **Direction** | Clockwise (R = Right/Clockwise) | | **Torque Range** | Typically 0.2 to 0.4 N·m (Newton meters) | | **Operating Temp** | -5°C to 50°C | | **Body Material** | Polycarbonate or high-grade plastic | | **Internal Fluid** | High-viscosity Silicone Oil | --- ## 2. Internal Electronic & Mechanical Function While it acts as a mechanical buffer, its integration into electronic systems involves several key principles: ### A. The Viscous Shearing Principle The device contains a rotor and a stator submerged in **silicone oil**. When a force is applied, the shearing resistance of the oil converts kinetic energy into thermal energy. In electronic appliances, this prevents mechanical "noise" or vibrations that could interfere with sensitive sensors. ### B. Directional Logic (The "R" Suffix) In the FRT series: - **"R" (Clockwise):** The damping force is applied when the shaft rotates clockwise. It rotates freely in the counter-clockwise direction. - **"L" (Counter-Clockwise):** The damping force is applied when the shaft rotates counter-clockwise. ### C. Application in Electronics These parts are critical in the "soft-open" or "soft-close" features of modern electronics, such as: 1. **CD/DVD/Blu-ray players:** For smooth tray ejection. 2. **Control Panels:** For hidden flip-up screens or touch panels. 3. **Smart Home Appliances:** For soft-closing lids on high-end washing machines or microwaves. --- ## 3. Installation Dimensions (Standard) | Feature | Measurement (approx.) | | :--- | :--- | | **Outer Diameter** | 15mm - 20mm | | **Shaft Shape** | D-cut or Gear-type | | **Weight** | ~3.0g to 5.0g | --- ## 4. Maintenance and Usage Notes * **Temperature Sensitivity:** The viscosity of the internal oil changes with temperature. At higher temperatures, the damping becomes "looser"; at lower temperatures, it becomes "stiffer." * **Speed Dependency:** The damping torque is proportional to the rotation speed. Rapid movements will encounter higher resistance.