Detailed Explanation of Dental Chair Electric Motor Applications

1. Component Composition

The dental chair is an essential core piece of equipment in dental treatments, integrating multiple functions to assist doctors in performing efficient and safe procedures. Its main components include:

• Chair Structure: Composed of the main chair frame, backrest, seat cushion, leg rest, and headrest, with height and angle adjustment functions.
• Electric Lifting System: Controls the chair height via push rod motors or lifting columns, enhancing the doctor's comfort during procedures.
• Electric Adjustment Mechanism: Controls the tilting of the backrest, the extension and retraction of the leg rest, and the height of the headrest, accommodating different patient body types and treatment positions.
• Doctor's Control Panel: Includes high-speed/low-speed handpiece interface, water and air controls, light control, and the control panel.
• Treatment Light System: Dental shadowless light typically installed above the chair, with adjustable angles.
• Foot/Hand Control System: Used to quickly switch treatment positions or preset actions.
• Water and Air Control System: Connects to cleaning water, suction devices, spray guns, and other attachment devices.

2. Working Principle

The dental chair works through multiple motors that collaborate to achieve multi-dimensional adjustments. When the doctor or patient gives a command through the panel or foot pedal, the control system drives various push rod motors or lifting motors to perform corresponding actions, such as:

• Overall Seat Lifting: Adjusts the seat height.
• Backrest Tilt Forward or Backward: Adjusts the backrest angle according to the treatment needs.
• Leg Rest Extension or Retraction: Extends or retracts the leg rest to ensure comfort.
• One-Button Reset to Initial Position: Resets the chair to emergency or standby position.
• Headrest Adjustment: Aligns the headrest for better exposure of the oral cavity.

All movements must respond quickly, operate smoothly, and maintain low noise levels to ensure a quiet and comfortable treatment environment.

3. Key Role of Motors in the System

The motor system provides core power and motion control for the dental chair, with its primary roles as follows:

• Precise Lifting Control: The seat height can be adjusted smoothly within a range of 450mm to 800mm.
• Multi-Degree-of-Freedom Posture Adjustment: Independent control of the backrest, leg rest, and headrest with precise angle adjustments.
• Silent Operation Design: Using low-noise permanent magnet DC motors or brushless motors, the operating noise is kept below 45dB.
• Position Memory Function: Motors with travel sensors to achieve position memory and reset functions.
• High Synchronization of Control: The backrest and leg rest must work in synchronization to avoid impact or jamming between motors.
• High Protection Requirements: The motor system needs to be dustproof, moisture-resistant, and corrosion-resistant, meeting medical-grade safety standards.
• Strong Continuous Load Capacity: Supports high-frequency starts and stops, enhancing the reliability of the equipment.

4. Customized Motor Solutions

For dental chairs with high requirements for noise reduction, quick response, and multi-degree-of-freedom synchronized motion, we recommend the GPG-MD series low-noise push rod motors and miniature lifting column combination solution. This motor series uses a silent gearbox design and permanent magnet DC low-speed high-torque motors, paired with high-precision Hall position sensors to achieve ±1mm position feedback accuracy.

The lifting column adopts the GPG-LU660 lifting unit, which can carry a load of up to 6000N per section and supports fast start-stop without vibration, meeting the overall lifting needs of the chair. The control system is equipped with the GPG-DCU400 multi-axis control module, capable of synchronizing up to five motors, supporting both foot and hand control inputs, and providing three preset position switches and return functions.

The entire product line is CE and EN60601 certified, with an IP54 protection rating. Optional waterproof connectors and antibacterial surface treatments are available. If customers have additional needs for headrest adjustment modules, positioning accuracy, or remote network control, we can provide customized motor interface protocols and structural optimizations to help build highly compatible, market-competitive, high-end dental chair product lines.