Seat arrangement
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Solution Overview
Problem
Existing seat arrangements with adjustable footrests and backrests often require complex mechanisms that occupy significant space, limiting their compactness and adjustability.
Innovation Solution
A seat arrangement featuring a base frame, a seat member, and a footrest with a dual-arm lever arm that allows the seat member to pivot about a first articulation axis, enabling a compact mechanism for folding in and out, and a rod mechanism for adjusting the footrest's position, utilizing a single drive for both seat displacement and footrest folding, and incorporating a backrest inclination module for space-efficient recline.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional mechanism with separate components for seat adjustment and footrest folding is used, then the adjustability and functionality are achieved, but the device occupies significant space and loses compactness
Solution Approach 1:
The patent combines the seat adjustment mechanism and footrest folding mechanism into a single integrated system. The sliding member simultaneously controls both the seat position and footrest angle, merging two separate adjustment functions into one compact mechanism that reduces overall space occupation while maintaining full adjustability.
Solution Approach 2:
The sliding member serves multiple functions: it adjusts the seat position forward and backward, controls the footrest folding angle, and coordinates the motion of both components. This multi-functional design eliminates the need for separate mechanisms, achieving compactness without sacrificing versatility.
2Volume of moving object
If a compact mechanism is implemented to reduce space occupation, then the volume is reduced, but the mechanism complexity increases
Solution Approach 1:
The footrest is nested within the seat structure when folded, and the rod mechanism is integrated into the sliding member assembly. This nesting arrangement allows compact storage of moving parts without requiring separate housings or complex mounting structures, reducing space while maintaining mechanical simplicity.
Solution Approach 2:
The mechanism uses dynamic coordination between the sliding member's linear motion and the footrest's rotational motion. As the sliding member moves, it automatically adjusts the footrest angle through the rod mechanism, creating a dynamic system that adapts its configuration based on the sliding member's position, thereby simplifying the overall structure.
3Device complexity
If a single drive is used for both seat displacement and footrest folding, then the device complexity is reduced, but the control precision for each function may be compromised
Solution Approach 1:
The mechanism is designed so that the sliding member's motion automatically initiates the appropriate sequence of actions: first adjusting the seat position, then coordinating the footrest folding. This preliminary arrangement of components ensures that the single drive produces the correct sequence of movements without requiring complex control systems, maintaining both simplicity and operational precision.
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
The solution enables a compact, space-efficient mechanism that allows for adjustable seat depth and backrest inclination, facilitating a smooth transition from upright to reclined positions without occupying excessive space, maintaining aesthetic appeal while providing comfort and versatility.
Implementation Method 1
a dual-arm lever arm (16) having a first end (16a), a second end (16b) and a central region (16c), wherein the dual-arm lever arm is rotatably supported on the sliding member (8) in the central region (16c) thereof
Implementation Method 2
the footrest (3) is articulated to the seat frame (6) by means of a rod mechanism (12) and can be adjusted between a folded-in position and a folded-out position
Data Source
Figure 1
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AI summary
The seat arrangement according to the invention has a base frame, a seat member and a footrest, wherein the seat member provides for a seat frame which is retained on a sliding member so as to be able to be pivoted about a first articulation axis, wherein the sliding member is displaceably guided between a first and a second position in a guiding profile, and wherein the footrest is articulated to the seat frame by means of a rod mechanism and can be adjusted between a folded-in position and a folded-out position. Furthermore, a drive for displacing the sliding member and for folding the footrest in and out is provided between the base frame and the rod mechanism of the footrest. Furthermore, the seat arrangement comprises a dual-arm lever arm having a first end, a second end and a central region, wherein the dual-arm lever arm is rotatably supported on the sliding member in the central region thereof and is connected with the first end thereof to the rod mechanism of the footrest and with the second end thereof to the seat frame in such a manner that a movement of the footrest between the folded-in and folded-out position brings about a pivot movement of the seat frame about the first articulation axis between a basic position and an inclined position.