Multi-stage linkage interlocking structure of swing dining chair
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Solution Overview
Problem
Conventional swing dining chairs lack safe and reliable locking structures, leading to poor use safety and hidden dangers due to excessive included angles and maloperation during transformation between swing and dining chair modes.
Innovation Solution
A multi-stage linkage interlocking structure with adjustable included-angle stages, featuring a seat portion and backrest connected via a multi-stage included-angle adjustment device, locking mechanisms, and sliding connection rods to ensure safe and convenient operation by locking the seat portion and backrest at specific angles, preventing accidental transformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the included angle between seat portion and backrest is made adjustable to enable transformation between swing and dining chair modes, then the adaptability is improved, but the reliability deteriorates due to lack of safe locking structures
Solution Approach 1:
The patent applies preliminary action by pre-arranging multiple locking devices (first locking device between seat portion and mounting base, second locking device between seat portion and backrest, third locking device between mounting base and backrest) that are activated in a specific sequence during the transformation process. The backrest adjustment triggers the sliding connection rod to move, which automatically unlocks the first locking device, allowing the seat portion to rotate to the swing position where the third locking device then engages to lock the multi-stage included-angle adjustment device. This pre-arranged sequence ensures safety without requiring user intervention.
Solution Approach 2:
The patent uses the sliding connection rod as an intermediary element that transmits the movement of the backrest to the locking devices. When the backrest is adjusted from non-swing to swing included-angle stage, it propels the sliding connection rod to move, which in turn propels the second locking device to unlock the first locking device. This intermediary mechanism ensures reliable transmission of the transformation action and automatic engagement of locking devices.
2Device complexity
If conventional swing dining chairs lack locking structures to simplify the device complexity, then the ease of manufacture is improved, but the reliability deteriorates due to maloperation hazards
Solution Approach 1:
The patent merges multiple locking functions into a coordinated system where the first locking device locks the seat portion to the mounting base, the second locking device locks the first locking device, and the third locking device locks the multi-stage included-angle adjustment device. These locking devices are combined with the multi-stage included-angle adjustment device and sliding connection rod to form an integrated interlocking structure that ensures safety while maintaining operational simplicity.
Solution Approach 2:
The patent implements self-service by designing the locking devices to be automatically activated through the user's normal operation of adjusting the backrest. When the user adjusts the backrest to the swing included-angle stage, the sliding connection rod automatically moves to unlock the first locking device, and the third locking device automatically engages to lock the adjustment device at the swing position. This eliminates the need for separate manual locking actions while ensuring safety.
3Ease of operation
If the backrest is allowed to be freely adjusted during swing mode transformation, then the ease of operation is improved, but the reliability deteriorates due to potential maloperation
Solution Approach 1:
The patent implements feedback by designing the linkage between the backrest adjustment and the locking devices. The backrest adjustment provides feedback through the sliding connection rod to the locking devices, which respond by automatically unlocking or locking at appropriate stages. This feedback mechanism ensures that the transformation process proceeds correctly and prevents maloperation by automatically engaging the third locking device to fix the backrest at the swing included-angle stage when the seat portion reaches the swing position.
Data Source
AI summary
A multi-stage linkage interlocking structure of a swing dining chair comprising a swing arm and a chair body. The chair body comprises a seat and a backrest. A multi-stage included-angle adjustment device is arranged between the seat and the backrest. The swing arm is provided with a mounting base, and the seat is rotatably connected with the mounting base. A first locking device is arranged between the seat and the mounting base for locking the seat. The seat is provided with a second locking device for locking the first locking device. A sliding connection rod in linkage with the backrest is provided for unlocking the second locking device. A third locking device in linkage with the mounting base and interacting with the multi-stage included-angle adjustment device is arranged between the seat and the mounting base. The present disclosure has a simple structure, achieves convenient operation and safety, and avoids mal operation.