Electric Bed Frame Dynamics for Abdominal Pressure Relief
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Solution Overview
Problem
Traditional electric beds are uncomfortable and inconvenient, especially for users with mobility issues, as the back frame's upward rotation shortens the distance between the buttocks and the back frame, causing abdominal pressure and requiring users to move awkwardly to adjust postures or access nightstands.
Innovation Solution
An electric bed design featuring a movable frame and a driving member with a cylinder and actuation rod system that allows the back frame to rotate upward while the movable frame moves forward, maintaining a comfortable distance and facilitating access to nightstands during posture changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the back frame is rotated upwardly to enable posture change, then the user can change between lying and sitting postures, but the distance between the user's buttocks and the back frame becomes shorter causing abdominal pressure and discomfort
Solution Approach 1:
The patent applies dynamics by making the bed frame movable rather than fixed. The movable frame is slidably disposed on the base frame and can move backward and forward automatically when the back frame rotates, enabling the system to adapt dynamically to posture changes without requiring manual user adjustment
Solution Approach 2:
The patent introduces motion in an additional dimension by combining the rotation of the back frame with the sliding motion of the movable frame along the longitudinal axis of the bed. This two-dimensional motion (rotation + translation) resolves the contradiction by maintaining comfortable spacing while enabling posture change
2Adaptability or versatility
If the back frame is lifted up for posture change, then the user can sit up, but the distance between the back frame and the nightstand increases making it inconvenient to access objects
Solution Approach 1:
The movable frame dynamically adjusts its position along the longitudinal axis in response to back frame rotation, enabling the system to maintain optimal spacing between the back frame and nightstand during posture transitions
Solution Approach 2:
The patent merges two functions into one mechanism: the back frame rotation for posture change and the movable frame sliding for maintaining access distance. This combined motion allows simultaneous achievement of posture change and nightstand accessibility
3Adaptability or versatility
If the back frame is returned to horizontal position, then the bed returns to lying posture, but the user must move buttocks toward the bed head to return to original position
Solution Approach 1:
The automatic sliding mechanism dynamically compensates for position changes during posture transitions, eliminating the need for manual user movement to maintain comfortable positioning
Solution Approach 2:
The system performs self-adjustment through the automatic sliding mechanism that moves the movable frame in response to back frame rotation, eliminating the need for user intervention to maintain proper positioning during posture changes
Data Source
AI summary
An electric bed includes a base frame, a movable frame slidably disposed on the base frame and moveable backward and forward, a back frame having a rear end pivotally connected with the movable frame, and a driving member extendable and retractable in length, having a rear end pivotally connected with the movable frame and located below the rear end of the back frame, and a front end pivotally connected with the back frame. A linkage has a front end pivotally connected with the base frame, and a rear end pivotally connected with the back frame and located between the rear end of the back frame and the front end of the driving member. When the driving member extends longer, the back frame is rotated upwardly to enable the rear end of the back frame and the movable frame to horizontally move forward together.