Seat Rotation Locking Mechanism for Arbitrary Angle Fixation
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Solution Overview
Problem
Existing seat rotating devices cannot fix the rotation angle of a seat body at an arbitrary location, limiting user convenience and comfort.
Innovation Solution
A seat rotating device with a rotary disc, outer circumferential ring, release plate, transmission state selection mechanism, and lock unit that allows the seat body to be rotated and fixed at any desired angle, using a drive device to transition between non-transmission and transmission states and rotationally fixed and rotatable states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a multistep locking mechanism is used to rotate the seat body, then the rotation angle can be locked at predetermined locations, but the lock position cannot be set to an arbitrary location
Solution Approach 1:
The patent replaces the traditional multistep mechanical locking mechanism with a friction-based holding mechanism. The friction holding member presses against the rotary disc to prevent rotation, allowing continuous angle adjustment rather than discrete predetermined positions. This substitution enables arbitrary lock positions while maintaining operational simplicity.
Solution Approach 2:
The invention changes the fundamental parameter of angle positioning from discrete predetermined values to continuous arbitrary values. By using a friction-based holding mechanism instead of a multistep locking mechanism, the system allows the rotary disc to be stopped and held at any rotation angle, providing flexible adaptability for different seating positions.
2Adaptability or versatility
If a friction holding mechanism is used to enable arbitrary rotation angle positioning, then the lock position can be set to any location, but the mechanism complexity increases
Solution Approach 1:
The patent merges the rotation driving function and the rotation holding function into a single integrated mechanism. The drive device rotates the release plate, which through the friction holding member simultaneously provides both the driving torque for rotation and the holding force for positioning. This merging eliminates the need for separate locking mechanisms, reducing overall device complexity despite enabling arbitrary angle positioning.
Solution Approach 2:
The release plate serves multiple functions: it acts as both the driving element that transmits rotation from the drive device to the rotary disc, and as the holding element that prevents rotation through the friction holding member. This multi-functionality reduces the number of components needed, offsetting the complexity introduced by the friction-based arbitrary positioning capability.
3Reliability
If a transmission state selection mechanism and lock unit are added to enable arbitrary positioning, then the seat can be fixed at any angle, but the number of components increases
Solution Approach 1:
The patent introduces a dynamic transmission state selection mechanism that can switch between different operational states: a transmission state where the release plate drives the rotary disc for rotation, and a non-transmission state where the friction holding member prevents rotation to maintain positioning. This dynamic state switching provides reliable fixation at arbitrary angles while using a unified mechanism rather than multiple separate components.
Solution Approach 2:
The friction holding member acts as an intermediary element between the release plate and the rotary disc. It transfers the holding force from the release plate to the rotary disc to prevent rotation, enabling reliable fixation without requiring a complex direct locking mechanism. This intermediary approach simplifies the overall component structure while maintaining fixation reliability.
Data Source
AI summary
A seat rotating device includes: a transmission state selection mechanism that is provided between a rotary disc and a release plate and selects between a non-transmission state in which rotation of the release plate is not transmitted to the rotary disc and a transmission state in which rotation of the release plate is transmitted to the rotary disc; and a lock unit that is provided between the rotary disc and an outer circumferential ring and provided to select between a rotationally fixed state in which rotation of the rotary disc with respect to the outer circumferential ring is fixed and a rotatable state in which rotation of the rotary disc with respect to the outer circumferential ring is allowed.