Vehicle Seat Depth Locking for Independent Cushion Extension
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Solution Overview
Problem
Existing vehicle seats with seat depth adjustments lock the seat part relative to the frame using a mechanism that does not allow for independent locking of the seat surface enlargement, limiting flexibility in adjusting the seat depth without affecting the backrest position.
Innovation Solution
A vehicle seat design featuring a locking device with a deflectable end that engages and disengages from a recess in the seat part frame, allowing the seat depth adjustment element to move independently, using a sliding carriage element and actuating unit to control the locking mechanism, enabling adjustable seat depth without altering the seat part's position relative to the frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the seat part is locked relative to the frame using a conventional locking mechanism, then the seat part position is stable, but the seat depth adjustment flexibility is limited
Solution Approach 1:
The locking mechanism is segmented into a locking unit with a deflectable second end and a separate locking element. The locking unit is rigidly connected to the seat depth adjustment element at its first end, while the second end can deflect to engage or disengage from the locking element in the recess. This segmentation allows independent locking of the seat depth adjustment element relative to the seat part frame, enabling flexible seat depth adjustment without affecting the seat part's position relative to the frame.
2Area of moving object
If the seat depth adjustment element is made displaceable relative to the seat part frame, then the seat surface area is enlarged, but the locking stability is reduced
Solution Approach 1:
The locking unit incorporates a deflectable second end that can dynamically transition between engaged and disengaged states. In the engaged state, the second end locks the seat depth adjustment element in position, providing stability. When deflected, the second end releases the locking element, allowing displacement for seat depth adjustment. This dynamic capability enables the system to maintain both stability during use and adjustability when needed, resolving the contradiction between locking stability and displacement capability for seat surface area enlargement.
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 allows for up to 60 mm of seat depth adjustment, providing a flexible and customizable seating experience by enabling independent locking and unlocking of the seat depth adjustment element, enhancing user comfort and adaptability.
Implementation Method 1
a locking unit (8) having a first end (10) which is rigidly arranged on the seat depth adjustment element (5) and a second end (11) which is deflectable in a height direction (H)
Data Source
AI summary
A vehicle seat is provided that has a seat part frame and a seat back adjustment with a seat depth adjustment element, where the seat back adjustment element can be displaced relative to the seat part frame, where a locking device locks a displacement of the seat depth adjustment element relative to the seat part frame by engaging at least one recess of the seat part frame, where the locking device includes a locking unit which has a first end on the seat depth adjustment element, and a second end, which can be deflected, the second end engaging the locking element in the recess in a non-deflected position and the locking element being separated from the recess in a deflected position and a sliding carriage element that deflects the second end of the locking unit when the sliding carriage element is displaced relative to the locking unit.