Bed Stretcher Arrangement with Dual Sheet Rolling Mechanism
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Solution Overview
Problem
Current bed-based technologies for spine and joint recovery are inadequate as they do not provide sufficient rest for spinal discs, leading to back problems due to insufficient recovery time, and often require attachment mechanisms that are cumbersome.
Innovation Solution
A stretcher arrangement comprising two sheets on a bed with a sheet movement unit and control unit that applies a gradual stretching movement to the spine by rolling one sheet while the person sleeps, allowing for variable speed and program control without the need for attachment, using a roller mechanism driven by an electrical motor and potentially elastic attachment members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If attachment mechanisms are used to secure the person to the stretching device, then the stretching effect is improved, but the ease of operation deteriorates
Solution Approach 1:
The patent removes attachment mechanisms entirely from the stretching system. Instead of securing the person to the device, the sheets are simply placed on the bed and the person lies on them normally. The stretching effect is achieved through the movement of sheets alone, extracting the cumbersome attachment step while maintaining therapeutic effectiveness.
Solution Approach 2:
The sheets themselves perform the stretching function without requiring external attachment mechanisms. The friction between the sheets and the person's body, combined with the rolling motion, automatically provides the necessary stretching force. The system serves itself through the inherent interaction between the moving sheets and the person's body.
2Productivity
If a roller mechanism is used to move the sheets, then the productivity is improved, but the device complexity increases
Solution Approach 1:
The roller mechanism serves multiple functions: it moves the sheets at controlled speeds, provides variable stretching rates, and can be easily controlled through simple interfaces. This single multi-functional component replaces what would otherwise require multiple separate mechanisms for sheet movement, speed control, and program management.
Solution Approach 2:
The patent replaces complex mechanical attachment and securing systems with a simple roller-based sheet movement system. The electrical motor and roller mechanism provide controlled movement without requiring complex mechanical linkages, pulleys, or manual adjustment mechanisms that would increase device complexity.
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
This solution provides improved therapeutic and recovery effects by ensuring the spinal discs receive adequate rest and stretching without the need for attachment, promoting better health and well-being through tailored movement programs.
Implementation Method 1
The sheet movement unit (18) is structured to be arranged in connection with at least one of the first and second ends (10, 12) of the bed (8), and comprises at least one roller (22) to be arranged essentially perpendicular to the longitudinal axis A. The control unit (20) is configured to control the rotation of the at least one roller (22), such that at least one of the first and second sheets (4, 6) is slowly wound up on the at least one roller (22)
Data Source
Figure 1~3
Figure 4
AI summary
A stretcher arrangement (2) comprising a first sheet (4) and a second sheet (6) to be arranged on a bed (8) having a first end (10) and a second end (12), and a length L along a longitudinal axis A. The first sheet (4) comprises a first surface (14), being a part of the first sheet that faces upward when the sheet is arranged on the bed (8). The second sheet (6) comprises a second surface (16), being a part of the second sheet (6) that faces upward when the sheet is arranged on the bed (8). The first surface (14) and the second surface (16) cover different parts of the bed surface, and border each other along a border line B that at least partly is essentially perpendicular to said axis A. The stretcher arrangement (2) further comprises: -a sheet movement unit (18) structured to apply movement to at least one of said first and second sheets (4, 6) essentially along the longitudinal axis A of said bed; -a control unit (20) configured to control said sheet movement unit (18), according to a set of sheet movement rules, such that a relative movement between said first surface (14) and said second surface (16) is provided, moving these surfaces apart from each other, resulting in that a stretching movement is applied to a person lying on the sheets.