Seating furniture having a wall-away function and a foot part that can be pivoted out
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Solution Overview
Problem
Existing seating furniture with a wall-away function and floor-free design has a short footrest that protrudes when pivoted out, limiting reclining comfort as users' feet extend beyond the footrest, lacking a supporting surface.
Innovation Solution
A longer footrest is implemented, pivoted in parallel below the seat part, using a lever geometry and linear actuator arrangement that guides the footrest closer to the seat during reclining, ensuring a complete supporting surface by extending the footrest's travel distance and adjusting the seat's inclination first, followed by the footrest's extension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a longer footrest is implemented to provide complete supporting surface for user's feet, then reclining comfort is improved, but installation space requirement increases
Solution Approach 1:
The footrest is repositioned from a horizontal extension beyond the front edge to a vertical arrangement below the seat part, utilizing the unused space underneath the seat. This dimensional change allows a longer footrest to be accommodated within the same installation envelope, providing complete foot support without increasing the furniture's front projection.
Solution Approach 2:
The footrest is designed to be dynamically adjustable between a retracted position (below the seat part) and an extended position (providing full foot support). This dynamic capability allows the footrest to adapt its length according to the reclining position, providing complete foot support when needed while maintaining a compact profile during other operations.
2Ease of operation
If the footrest is extended horizontally beyond the front edge, then foot support surface is provided, but the slim design of the front seat area is compromised
Solution Approach 1:
Instead of extending the footrest horizontally beyond the front edge of the seat, the invention repositions it vertically below the seat part. This dimensional relocation maintains the slim front profile while still providing adequate foot support surface area when the footrest is extended to its full length in the vertical direction.
3Volume of moving object
If the footrest is positioned below the lowest point of the adjustment mechanism, then installation space is saved, but the footrest length is limited
Solution Approach 1:
The footrest is designed with dynamic extension capability that allows it to reach its full length below the lowest point of the adjustment mechanism during reclining operations. The footrest can be positioned compactly during normal sitting but extends downward to provide complete foot support when the seat is in the reclined position, thus saving installation space while maintaining adequate length.
Data Source
AI summary
An item of seating furniture includes a chassis, a seat part having a pivotable inclination, a back part pivotable relative to the seat part, and a foot part, which is connected to the seat part via a foot-part adjustment mechanism and can be pivoted out. To adjust the item of seating furniture from an upright sitting position into a lying position, the seat part is moved forward relative to the chassis. In the sitting position, the foot part is pivoted in, substantially underneath the seat part. In the lying position, the foot part is pivoted out, in front of the seat part, such that the seat part is extended by the foot part. When being pivoted into a lying position, the back part moves forward, together with the seat part, relative to the chassis, and therefore, in any pivoted position, the back part does not project, or only insignificantly projects, beyond the rear edge of the item of seating furniture.