Quick-Release Headrest Assembly for Tool-Less Seat Maintenance
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Solution Overview
Problem
Existing headrest assemblies in seats, particularly in aircraft seats, require complex and labor-intensive methods for maintenance, cleaning, or replacement, which do not align with aviation guidelines and standards, and there is a need for a quick and tool-less mechanism to access and disassemble components like the headrest slide mechanism and dress cover.
Innovation Solution
A quick release headrest assembly featuring a retractable plunger, compressible spring, and stopper mechanism that allows for tool-less disengagement of the headrest support plate from the seatback, enabling easy access and maintenance of the headrest components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If traditional headrest assembly methods are used, then the headrest is securely attached to the seatback, but the maintenance and removal process becomes complex and labor-intensive
Solution Approach 1:
The headrest assembly is segmented into separable components: the headrest support plate, the base, and the removal sub-assembly. The removal sub-assembly itself is segmented into a plunger, stopper, and spring components. This segmentation allows the headrest to be easily detached from the seatback by simply pressing the plunger, which moves the stopper to disengage from the support plate cavity, thereby simplifying maintenance accessibility without requiring complex tools or procedures.
Solution Approach 2:
The removal mechanism is designed to be self-operating through the self-service principle. The plunger, when pressed, automatically compresses the spring which in turn moves the stopper to disengage from the support plate cavity. This self-service mechanism eliminates the need for external tools or complex manual operations, allowing users to easily remove and maintain headrest components themselves.
2Productivity
If a secure attachment mechanism is used to firmly fix the headrest, then the headrest remains stable during use, but the removal process requires more time and labor
Solution Approach 1:
The attachment mechanism transitions from a static secure connection to a dynamic, easily reversible connection. The stopper can be in two states: engaged with the support plate cavity for stable attachment during use, or disengaged when the plunger is pressed. This dynamic characteristic allows the headrest to remain firmly fixed during normal operation while enabling quick removal when needed, thereby increasing maintenance speed without requiring excessive removal effort.
Solution Approach 2:
The spring acts as an intermediary element between the plunger and the stopper. When the plunger is pressed, it compresses the spring, which then pushes the stopper out of the support plate cavity. This intermediary mechanism translates the simple plunger pressing action into the effective disengagement of the stopper, reducing the direct effort needed for removal while maintaining secure attachment during use.
3Ease of operation
If a simple attachment mechanism is used, then the headrest can be easily removed, but the secure attachment and stability during use is compromised
Solution Approach 1:
The removal mechanism uses simple, inexpensive components like the plunger, stopper, and spring that can be easily replaced if needed. These components provide sufficient attachment security for their intended function without requiring complex or durable mechanisms, aligning with the principle of using simple, replaceable parts for functions that don't require long-term durability beyond their operational cycle.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Facilitates quick, low-labor, and cost-effective maintenance of headrest assemblies, aligning with aviation standards by allowing easy removal and reassembly without tools, thereby reducing maintenance time and enhancing accessibility.
Implementation Method 1
a compressible spring coupled to the second end of the plunger and configured to surround at least a portion of the plunger shaft
Implementation Method 2
the plunger configured to translate the stopper between at least a first stopper position and a second stopper position when a force is applied to the lever portion of the plunger to cause the plunger to compress a portion of the compressible spring within the cavity of the base
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
A headrest removal assembly (212) is disclosed. The assembly may include a plunger (214) including a plunger shaft and lever portion. The assembly may include a compressible spring (216) coupled to the plunger and configured to surround at least a portion of the plunger shaft. The plunger configured to translate the stopper (218) between at least a first position and a second position when a force is applied to the lever portion of the plunger to cause the plunger to compress a portion of the compressible spring within the cavity of the base to cause the stopper to disengage from the cavity within the headrest support plate (204) to cause the headrest removal assembly to disengage from the headrest support plate.