Safety Caster Office Chair

In safety caster office chairs, the dual-brake braking structure of light-duty casters achieves dual locking through a linkage mechanism, suitable for office scenarios requiring precise positioning, but the appropriate type must be selected based on the chair model.

Core Principle of the Dual-Brake Braking Structure

The dual-brake braking structure achieves dual locking through a linkage mechanism: when the brake pedal is pressed, the cam mechanism simultaneously acts on the friction surface on the outer edge of the wheel and the positioning teeth of the steering bracket. The former prevents wheel rolling through friction, while the latter restricts rotational freedom through tooth-and-slot engagement, thereby locking both horizontal and steering movements simultaneously. This design is particularly effective on hard surfaces (such as wooden floors) or in standing desk scenarios, preventing slight displacement of the chair caused by the user getting up, leaning, or performing height adjustments, thereby enhancing stability.

Material and Durability Design

The base of high-quality dual-brake casters is typically made of cold-rolled steel, balancing strength and lightweight requirements; the brake pads adopt a nylon-coated structure, ensuring long-lasting friction while preventing scratches caused by direct metal-to-ground contact. Additionally, the product must pass durability tests to ensure that the braking force decay rate is controlled within a reasonable range (e.g., ≤15%) during repeated brake-release cycles, preventing lock failure after long-term use.

Usage Scenarios and Adaptability

• Suitable Scenarios: The dual-brake structure is ideal for office environments requiring precise positioning, such as fixed-position straight chairs and conference chairs. Its dual-locking function ensures that the chair remains completely stationary, reducing the risk of sliding due to uneven floors or external interference.
• Unsuitable Scenarios: For ergonomic chairs equipped with a synchronous tilt mechanism, the dual-brake structure may cause a jarring sensation during recline due to excessive braking torque, affecting comfort. In such cases, it is recommended to choose single-brake (restricting rolling only) or caster wheels (free movement) to balance stability and flexibility.

Purchase Considerations

• Operational Feedback: The brake pedal should feature a non-slip texture design to ensure that users can clearly perceive the operating force when wearing different types of footwear (e.g., leather shoes, sneakers), avoiding accidental triggering or unlocking failures.
• Status Indication: Some high-end models are equipped with a visual red indicator ring that intuitively displays the locking status through color changes, enhancing usability.
• Chair Model Compatibility: Before purchasing, confirm the type of office chair to avoid using the dual-brake structure on leisure negotiation chairs that require frequent movement or ergonomic chairs with complex tilt functions.