Backrest Stopper Mechanism for Easy Entry Seat Assembly
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Solution Overview
Problem
Current easy entry seat assemblies with reclining mechanisms are complex and difficult to operate, increasing cost and assembly complexity.
Innovation Solution
A simplified backrest stopper mechanism with an easy entry stopper and actuator that allows for pivotal movement control, enabling the backrest to be easily moved to an entry position and locked, using a recliner lever, biasing mechanisms, and an actuating mechanism to facilitate operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a reclining mechanism is provided to facilitate movement of the backrest to an easy entry position, then the ease of operation is improved, but the device complexity increases due to a relatively large number of parts
Solution Approach 1:
The reclining mechanism is divided into separate functional components: a stopper member that limits backrest movement to a predetermined easy entry position, and a release member that interacts with the stopper. This segmentation allows each component to perform its specific function with a simple structure, reducing overall device complexity while maintaining ease of operation.
Solution Approach 2:
The stopper member is extracted as a distinct element from the backrest assembly, mounted separately on the seat frame. This extraction allows the stopper to be a simple, standalone component rather than an integrated complex mechanism, reducing the number of parts while providing the necessary movement control.
2Adaptability or versatility
If a reclining mechanism with multiple parts is used to control backrest movement, then the functionality is improved, but the ease of manufacture deteriorates due to increased assembly complexity and cost
Solution Approach 1:
The stopper member is designed to automatically engage with the backrest at the predetermined easy entry position without requiring additional actuators or complex control systems. The release member simply needs to be actuated to disengage the stopper, allowing the mechanism to self-regulate the backrest positioning. This self-service approach reduces manufacturing complexity while maintaining full functionality.
Solution Approach 2:
The stopper and release members are designed as simple, inexpensive mechanical components with minimal moving parts. The design prioritizes ease of manufacture and assembly over long-term durability, using basic mechanical elements that are simple to produce and replace if needed.
3Ease of operation
If the easy entry stopper is made movable from non-actuated to actuated position, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The release member is merged with the backrest assembly, and the stopper member is mounted on the seat frame. When the release member is actuated, it directly interacts with the stopper member to disengage it. This merging and direct interaction eliminates the need for separate actuation mechanisms, reducing device complexity while maintaining ease of operation.
Data Source
AI summary
An easy entry seat assembly may include a seat frame having a seat bottom and a backrest supported for pivotal movement relative to the seat bottom. A reclining mechanism may be provided on the seat frame to selectively control pivotal movement of the backrest relative to the seat bottom. A backrest stopper mechanism may be provided on the seat frame. The backrest stopper mechanism may include an easy entry stopper that can be movable from a non-actuated position to an actuated position to stop pivotal movement of the backrest in an easy entry position. An easy entry actuator may be provided on the seat frame, wherein operation of the easy entry actuator can cause movement of the easy entry stopper to the actuated position and release the reclining mechanism.