Recliner Leg Support Mechanism With Pivot-Sliding Extension
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Solution Overview
Problem
Designs of seating furniture without a separately movable end segment face challenges in achieving a sufficiently large leg support surface, especially in limited space, and require variable leg unit sizes or complex pivoting mechanisms.
Innovation Solution
A seating furniture design that uses a movement mechanism with an intermediate carrier and sliding guide, allowing the leg unit to move between stowed and use positions with an essentially horizontal orientation, eliminating the need for a variable leg unit size or separate end segment, utilizing a pivoting guide and sliding guide for cumulative displacement, and incorporating a pivoting mechanism for ergonomic positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a separately movable end segment is added to achieve a larger leg support surface, then the leg support area increases, but the device complexity increases
Solution Approach 1:
The leg unit is divided into a first section (front part with footrest) and a second section (rear part), which can pivot relative to each other about a pivoting axis. This segmentation allows the leg unit to achieve a larger effective support area through the relative movement of sections rather than adding a separate end segment, thereby reducing overall mechanism complexity while maintaining functional requirements
Solution Approach 2:
The leg unit incorporates a pivoting mechanism that allows dynamic adjustment between different configurations. The first and second sections can pivot relative to each other, enabling the leg unit to adapt its shape and support area dynamically without requiring complex additional mechanisms, thus resolving the contradiction between area and complexity
2Area of moving object
If the leg unit is designed to be variable in size to achieve sufficient leg support surface, then the leg support area increases, but the device complexity increases
Solution Approach 1:
The leg unit employs a pivoting mechanism between its first and second sections, allowing it to dynamically change its effective size and configuration. This dynamic adjustment capability provides variable support surface area without requiring complex size-change mechanisms, thereby resolving the contradiction between support area and mechanism complexity
3Length of moving object
If strong pivoting movement is used to move the leg unit from stowed to use position, then the movement range is sufficient, but the mechanical energy requirement increases
Solution Approach 1:
The movement mechanism is designed to move the leg unit primarily in a horizontal direction between stowed and use positions, avoiding strong vertical pivoting movements. By maintaining the leg unit in an essentially horizontal orientation throughout the movement, the mechanism reduces the mechanical energy required compared to designs that require lifting or strong angular pivoting, thus resolving the contradiction between displacement distance and energy consumption
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
This design provides a large leg support surface without additional end segments or size variability, maintaining horizontal orientation throughout the movement, enhancing usability and aesthetics by hiding mechanical components and reducing the risk of injury, while requiring minimal mechanical energy for operation.
Implementation Method 1
the pivoting guide having at least one first pivoting lever between the intermediate carrier and the seat unit or the base
Implementation Method 2
a sliding guide with a sliding member, the sliding member being guided in translation on the intermediate support
Data Source
Figure 1a~1c
Figure 2a~2c
Figure 3a~3c
AI summary
A seating furniture wherein the movement mechanism (20) is designed to transfer the leg unit (14) from the storage position, in which the leg support surface (14a) is substantially horizontally oriented, to the operating position, in which the leg support surface (14a) is also substantially horizontally oriented, the movement mechanism (20) has an intermediate support (30) which can be displaced relative to the seat unit (12) or the base by means of a pivot guide (36, 38), wherein the pivot guide (36, 38) has at least a first pivot lever (36) between the intermediate support (30) and the seat unit (12) or the base, and the movement mechanism (20) has a sliding guide (42, 46) with a sliding element (46), wherein the sliding element (46) is guided translationally on the intermediate support (30) and wherein the leg unit (14) is attached to the sliding element (42).