头顶行李舱 (Overhead Bin)

什么是头顶行李舱？

An overhead bin (also called an overhead locker or stowage bin) is a lockable storage compartment mounted in the ceiling structure above passenger seats inside the aircraft cabin. Overhead bins hold carry-on baggage, jackets, and personal items that passengers wish to keep accessible during flight. They are a critical component of the passenger experience and a significant determinant of boarding and deplaning speed — full or misused bins are among the most common sources of passenger complaints and boarding delays.

设计与功能

Modern overhead bins are integrated into the aircraft's interior monument structure — a modular system of panels, bins, lighting rigs, and air recirculation outlets that is engineered separately from the structural fuselage and installed during final assembly. The bin door mechanism uses a continuous hinge and a latch system certified to prevent inadvertent opening during turbulence or emergency maneuvers.

Bin capacity is measured in cubic feet. Airlines specify the maximum single item dimensions permitted in overhead bins (e.g., 22 × 14 × 9 inches for many US carriers). The total bin volume per seat determines whether an aircraft can accommodate standard carry-on trolley bags for all passengers — a specification called "bag for seat" compliance.

演变：翻转式与下拉式行李舱

• Traditional pivot-up door: The bin door swings upward and inward. Common on older narrow-body aircraft (Boeing 737 Classic). Has lower usable volume because the door arc limits how deep bags can be inserted.
• Drop-down (convertible) bin: The entire bin floor drops downward and outward, dramatically increasing access and usable depth. Standard on modern aircraft including the Boeing 737 MAX (Space Bins) and Airbus A320neo (XL Overhead bins). The 737 MAX Space Bins increase overhead capacity by 48% versus the 737NG's bins, accommodating 50% more roller bags.
• Pivot-out side panel: Used in some wide-body aircraft where the bin is wider and opens toward the aisle. The Airbus A380 and Boeing 777 use large bins on the side walls and center ceiling that accommodate multiple full-size roller bags on their sides.

典型案例

The Boeing 787 Dreamliner features notably larger overhead bins than previous narrow-to-wide-body transitions — the interior design team specifically benchmarked the 787's bins to accommodate one 22-inch roller bag per passenger seat on the full widebody fuselage. The Airbus A380 main deck bins are designed to hold bags wheel-first (standing upright), fitting more bags per unit length than traditional flat-sliding configurations. The Boeing 737 MAX Space Bins created a measurable boarding time improvement of approximately 2–3 minutes per flight versus prior 737 variants.

相关组件

Overhead bins are positioned directly above passenger seats and interact with the cabin pressure management system — air conditioning outlets and reading lights are typically integrated into the bin surround panels. The air recirculation system draws return air from the cabin floor level, with supply air distributed through nozzles at the base of the overhead bins. During emergency evacuations, passengers are instructed to leave bags behind — the overhead bin layout must allow rapid egress past open bin doors without causing bottlenecks in the aisle.