Electric Bed Slide-Bar Drive for Stable Motor Operation
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Solution Overview
Problem
Traditional electric beds have unstable operating conditions for their push rod motors, leading to potential failures and user safety risks due to the continuous directional and positional changes of the push rod motor.
Innovation Solution
The electric bed incorporates a motor configuration with a connecting rod, slide bar, and horizontal pushing motor system, where the connecting rod is hinged to the bed boards, and the slide bar slides within a chute, allowing the motor to operate more stably by dispersing pressure through a guide wheel and slot system, with a position sensor and controller for precise control and safety features like remote operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a linear actuator push rod motor is used to directly lift the bed board, then the structure is simple, but the operating condition of the push rod motor becomes unstable due to continuous directional and positional changes
Solution Approach 1:
The patent introduces a slide bar as an intermediary component between the push rod motor and the bed board. The slide bar moves along guide rails, converting the linear motion of the push rod into controlled movement that stabilizes the motor's operating conditions while maintaining structural simplicity.
Solution Approach 2:
The patent adds a horizontal dimension of movement by introducing guide rails that extend perpendicular to the bed board. This dimensional change allows the motor to operate from a stable horizontal position while the slide bar handles the complex motion requirements, separating the motor's function from the board's movement.
2Ease of operation
If the push rod motor directly pushes the bed board, then the driving mode is simple, but the push rod continuously changes direction and position causing unstable operating conditions
Solution Approach 1:
The slide bar acts as a mediator that absorbs the directional changes and positional variations. The push rod motor maintains a simple linear pushing action while the slide bar translates this into the required complex motion, keeping the motor's operating conditions stable.
Solution Approach 2:
The patent segments the motion function into two parts: the push rod motor provides simple linear force, while the slide bar and guide rails handle the complex directional changes. This segmentation allows each component to perform its function optimally without compromising stability.
3Adaptability or versatility
If the push rod motor operates in unstable conditions, then the bed can achieve postural changes, but motor failure and user injury risks increase
Solution Approach 1:
The guide rails and slide bar mechanism serve as a cushioning system that prevents sudden motor failures from causing dangerous movements. The constrained motion path ensures that even if the motor fails, the bed board moves predictably along the guide rails rather than uncontrollably.
Solution Approach 2:
The slide bar mechanism acts as a safety intermediary that decouples the motor from direct contact with the bed board. This intermediary absorbs shock and prevents direct transmission of motor failures to the user, reducing injury risks while maintaining postural adjustment capabilities.
Data Source
AI summary
An electric bed has a bed frame, multiple boards, and a motor structure. The bed frame comprises a lower bed frame and an upper bed frame, and the upper bed frame and the lower bed frame are connected by a connecting structure. The multiple boards are hinged, and at least one board is fixed onto the upper bed frame. The motor structure comprises a connecting rod, a slide bar, and a horizontal pushing motor system. The connecting rod has one end hinged with the first board of the multiple boards. The slide bar extends in the width direction of the bed frame and is arranged in a sliding chute in the length direction of the bed frame, so that it can slide along the length direction of the bed frame.