Twin sleeper
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Solution Overview
Problem
Existing seating structures that convert to beds are often unreliable, heavy, and expensive due to excessive moving parts and incompatibility with other design elements, making them difficult to manufacture and integrate into mobile structures efficiently.
Innovation Solution
A twin sleeper design featuring a sliding coupling system with slotted brackets and support brackets, allowing for a compact and lightweight conversion from a seating position to a bed position with fewer moving parts, using modular components compatible with standard manufacturing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional convertible sleeper designs are used, then seating-to-bed conversion functionality is achieved, but the structure becomes heavy and complex with excessive moving parts
Solution Approach 1:
The patent merges the seat frame and bed frame into a single integrated convertible frame assembly. The seat back, seat cushion, and bed mattress are all supported by the same frame structure, eliminating the need for separate mechanisms to convert between seating and sleeping configurations. This integration directly reduces the number of moving parts while maintaining full convertible functionality.
Solution Approach 2:
The frame assembly serves multiple functions simultaneously: it provides structural support for the seat in upright position, supports the mattress in sleeping position, and enables conversion between these states. The adjustable backrest mechanism and removable seat cushion work together to transform the same frame into different configurations, making the structure multi-functional rather than requiring dedicated components for each mode.
2Adaptability or versatility
If traditional convertible sleeper designs are used, then seating-to-bed conversion is achieved, but manufacturing cost and complexity increase
Solution Approach 1:
The convertible frame assembly is divided into modular components: an adjustable backrest assembly, a removable seat cushion, and a fixed base frame. Each module can be manufactured independently using standard furniture manufacturing processes, then assembled together. This segmentation simplifies manufacturing compared to traditional designs that require custom-integrated mechanisms, while still achieving full convertible functionality.
Solution Approach 2:
The backrest assembly incorporates adjustable positioning mechanisms that allow the frame to transition between upright seating configuration and horizontal sleeping configuration. This dynamic adjustability is achieved through standard hinge and support mechanisms rather than complex convertible mechanisms, making the design easier to manufacture while maintaining versatility.
3Volume of moving object
If compact sleeper design is implemented, then space efficiency is improved, but structural reliability may be compromised
Solution Approach 1:
The seat cushion nests within the frame structure when removed, and the adjustable backrest folds into a compact position when not in use. The mattress can be stored within the frame assembly when not needed. This nesting arrangement maximizes space efficiency in compact mobile structures while maintaining full functionality, and the integrated nature of the nested components actually strengthens the overall structural reliability.
Solution Approach 2:
The frame assembly uses curved support surfaces and angled bracing elements that distribute loads more effectively across the structure. The curved geometry of the backrest supports and seat frame connections provides structural strength while enabling compact folding and nesting configurations, thus maintaining reliability in a space-efficient design.
Data Source
AI summary
A chair that converts into a bed. The chair includes a sleeper frame assembly with a back frame assembly coupled with a hinge to a rear frame assembly. A sliding coupling connects the back frame assembly to a moveable seat assembly with a seat frame assembly. The sliding coupling includes a slotted bracket which may include a flanged beam. When the moveable seat assembly is moved forward, the back frame assembly and rear frame assembly unfold into planar alignment with the seat frame assembly, whereby cushions on each frame assembly form a bed.