Sliding Backrest Vehicle Seat for Gap-Free Horizontal Reclining
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Solution Overview
Problem
Vehicle seats with fold-down footrests cannot be fully reclined into a horizontal position, limiting the reclining surface and requiring additional cushions for extended support.
Innovation Solution
A vehicle seat design featuring a backrest that pivots and slides relative to the seat cushion, allowing a continuous, gap-free horizontal lying surface by moving the back cushion adjacent to the seat cushion, and incorporating a pivotable footrest and extendable headrest for additional support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the backrest is designed to pivot between sitting and reclining positions, then the seat provides reclining functionality, but the backrest cannot be fully reclined into a horizontal position and the reclining surface is limited
Solution Approach 1:
The backrest is divided into two independent parts: the backrest frame and the back cushion. The back cushion can slide along the backrest frame via a linear guide mechanism, allowing it to be positioned separately from the frame. This segmentation enables the frame to pivot for reclining while the cushion extends the lying surface independently.
Solution Approach 2:
The solution adds a sliding dimension to the traditional pivoting mechanism. While the backrest frame pivots between sitting and reclining positions, the back cushion adds another degree of freedom by sliding along the frame, effectively extending the reclining surface in a different dimensional direction.
2Device complexity
If the back cushion is fixed to the backrest frame, then the structure is simple, but a gap exists between the seat cushion and back cushion when reclined, creating an uncomfortable lying surface
Solution Approach 1:
The back cushion is made dynamically adjustable relative to the backrest frame through a slidable mounting system with a linear guide. This allows the cushion to move from a spaced position during sitting to an adjacent position during reclining, dynamically adapting to eliminate gaps and ensure continuous support on the lying surface.
3Area of moving object
If additional cushions are used to extend the reclining surface, then the lying surface area increases, but the device complexity and setup effort increase
Solution Approach 1:
The backrest frame is designed with a dual function: it serves as both the structural support for the back cushion during normal operation and as an extended support surface for additional cushions when fully reclined. This multi-functionality eliminates the need for separate extension components, allowing the same frame to accommodate different configurations.
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
Enables the seat to be converted into a reclining position with a seamless, extended lying surface, enhancing comfort and usability by providing stable support through adjustable components.
Implementation Method 1
the back cushion of the backrest is slidably mounted on the backrest frame relative to it via a linear guide
Implementation Method 2
The backrest frame of the backrest is pivotably connected to the support frame of the seat section between a sitting position and a horizontal reclining position
Data Source
Figure 1
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AI summary
The invention relates to a vehicle seat comprising a seat section (2) with a seat cushion (16) arranged on a support frame (15) and a backrest (3) pivotably arranged on the support frame (15) of the seat section (2), comprising a backrest frame (18, 19) and a back cushion (17) arranged on the backrest frame (18, 19). According to the invention, the backrest frame (18, 19) of the backrest (3) is pivotably connected to the support frame (15) of the seat section (2) between a sitting position and a horizontal reclining position, and the back cushion (17) of the backrest (3) is slidably arranged on the backrest frame (18, 19) relative to it via a linear guide (26, 27, 28).