Seatback Rotating Device with Gap-Based Locking Mechanism
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Solution Overview
Problem
Existing vehicle seatback rotating mechanisms rely on manual operation, lacking an efficient electric motor-driven solution for rotational displacement and locking modes.
Innovation Solution
A seatback rotating device incorporating an electric motor, application mechanism, rotor with protrusions, and abutment target portion, allowing for controlled rotational displacement and locking between first and second standing positions using a gap-based mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual operation is used to rotate the seatback, then the device complexity is reduced, but the ease of operation and productivity are worsened
Solution Approach 1:
The patent replaces the manual mechanical operation system with an electric motor-driven system. The motor (111) is connected to the rotor (121) which interacts with the abutment target portion (143) to automatically rotate the seatback, eliminating the need for manual effort while managing the increased device complexity through integrated electromagnetic actuation mechanisms.
2Productivity
If an electric motor is introduced to drive the seatback rotation, then the productivity is improved, but the device complexity increases
Solution Approach 1:
The patent introduces an electric motor (111) to replace manual operation, significantly improving productivity by enabling automated seatback rotation. The motor connects to the rotor (121) and abutment target portion (143) system, creating an integrated electromechanical assembly that manages complexity through functional integration rather than separate components.
Solution Approach 2:
The rotor (121) serves multiple functions: it acts as both the rotating element driven by the motor and the interaction mechanism with the abutment target portion (143) for positional control. This multi-functionality reduces the need for additional separate components, managing device complexity while maintaining productivity benefits.
3Manufacturing precision
If the gap between protrusion and abutment target portion is reduced, then the manufacturing precision is improved, but the reliability is worsened due to risk of excessive rotation speed
Solution Approach 1:
The patent optimizes the gap parameter between the protrusion (123) and abutment target portion (143) to balance manufacturing precision with reliability. By carefully controlling this dimensional parameter, the system achieves accurate positioning while preventing excessive rotation speeds that could compromise reliability, demonstrating parameter optimization to resolve the contradiction.
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 efficient, motor-driven rotational displacement of the seatback with controlled locking modes, enhancing user convenience and reducing manual effort while preventing excessive rotation speeds.
Implementation Method 1
The electric motor generates a rotational force that is used to rotationally displace the seatback
Data Source
AI summary
Provided is a seatback rotating device used for a vehicle seat. The seatback rotating device includes an electric motor, an action mechanism, a rotor, and an abutment target portion. In the seatback rotating device, when s seatback of the vehicle sat is placed in a first standing position, the rotor is positioned in a standby state that creates a gap between a first protrusion and the abutment target portion and a gap between a second protrusion and the abutment target portion, the first protrusion and the second protrusion being provided to the rotor. In the standby state, a gap length from the first protrusion to the abutment target portion is small relative to a gap length from the second protrusion to the abutment target portion.