Vehicle Seat Backrest Rotary Adjustment and Locking Mechanism
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Solution Overview
Problem
Existing vehicle seat designs fail to enable rapid folding and comfortable inclination adjustment of the backrest, with motorized adjustments not allowing for quick forward folding and requiring manual effort.
Innovation Solution
A vehicle seat with a motor-actuated rotary adjustment fitting and a locking device that allows the backrest to be folded forward manually or motorized, enabling both rapid folding and comfortable inclination adjustment, using a compact locking system with a catch or stop-latch mechanism for secure locking and adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If motorized adjustment is used for backrest inclination, then comfortable adjustment is achieved, but rapid forward folding is not enabled
Solution Approach 1:
The system dynamically switches between two operational modes: motorized adjustment mode for comfortable inclination changes within the comfort range, and manual folding mode for rapid forward folding to functional positions. The locking device transitions between locked and released states to enable these different operational characteristics as needed.
Solution Approach 2:
The locking device serves multiple functions: it enables both motorized adjustment within the comfort range and manual folding to functional positions. The rotary adjustment fitting also serves dual purposes for both types of movements, making the system versatile rather than requiring separate mechanisms for each function.
2Speed
If manual folding mechanism is added, then rapid folding is enabled, but device complexity increases
Solution Approach 1:
The patent merges the motorized adjustment mechanism and manual folding mechanism into a single integrated system. The locking device and rotary adjustment fitting serve both functions, combining what could have been separate complex mechanisms into one unified structure that achieves rapid folding without proportionally increasing complexity.
3Adaptability or versatility
If separate mechanisms for folding and adjustment are provided, then functions are achieved, but space consumption increases
Solution Approach 1:
The locking device and rotary adjustment fitting are designed as multi-functional components that handle both motorized inclination adjustment and manual folding operations. This universal design eliminates the need for separate dedicated mechanisms, significantly reducing the space required while maintaining full functional capability for both adjustment modes.
Data Source
AI summary
Vehicle seat includes a seat frame, a backrest frame with a motor fastened thereto, a rotary adjustment fitting with a backrest-side fitting half attached to backrest frame, and a seat-side fitting half, rotatable relative to one another via a shaft driven by the motor. There is a locking device shiftable via an actuating device from its locked position to a released position for folding backrest frame forward into a functional position. In its locked use position backrest frame can be pivoted relative to seat frame within a comfort range by motor. Locking device is provided for locking seat-side fitting half of rotary adjustment fitting on seat frame in use position and in backrest frame functional position, when locking device is in its released position, backrest frame is foldable forwardly via rotary adjustment fitting into its functional position, and can be raised by motor from functional position to upright use position.