Single-motor electrically powered bed
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Solution Overview
Problem
Conventional electric beds require two separate driving means and controlling systems to adjust the back and foot portions, leading to increased costs and complexity, making them more expensive than non-electric beds.
Innovation Solution
A single-motor electrically powered bed design that uses a combination of connecting-rod mechanisms and a sliding assembly to drive multiple bed boards with a single driving assembly, allowing for horizontal movement and deformation, thereby reducing costs and simplifying the electrical system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If two separate driving means and controlling systems are used to adjust back and foot portions of electric beds, then the bed can provide comfortable body positioning, but the costs and complexity of the electrical system increase significantly
Solution Approach 1:
The patent combines two separate driving means into a single motor unit. The first motor unit is connected to both the back portion lifting mechanism and the foot portion lifting mechanism through mechanical linkages, allowing one motor to control both bed sections simultaneously. This merging reduces the electrical system complexity while maintaining the dual-functionality of adjusting both back and foot portions for comfortable positioning.
Solution Approach 2:
The single motor unit is designed to perform multiple functions: it can independently control the back portion lifting, independently control the foot portion lifting, and coordinate both movements. This multi-functionality is achieved through a control system that can selectively engage different mechanical transmission paths from the single motor to the respective bed sections, eliminating the need for separate dedicated motors for each function.
2Adaptability or versatility
If two separate driving means are used for back and foot portion adjustment, then the bed functionality is complete, but the product cost increases significantly compared to non-electric beds
Solution Approach 1:
The patent merges two separate motor units into one shared motor unit that serves both the back portion and foot portion lifting mechanisms. This consolidation directly reduces component costs, manufacturing complexity, and assembly requirements. The mechanical linkage system transmits power from the single motor to both bed sections, maintaining full adjustment functionality while significantly lowering the bill of materials and production costs.
3Adaptability or versatility
If conventional electric bed design with two driving means is used, then the bed provides complete adjustment capability, but the volume and weight increase making transportation difficult
Solution Approach 1:
The patent consolidates two separate motor units into a single motor unit, directly reducing the overall weight of the bed. The mechanical linkage system uses efficient power transmission components that minimize additional weight. This single motor configuration maintains the ability to adjust both back and foot portions while significantly reducing the weight compared to dual-motor designs.
Solution Approach 2:
The patent extracts and eliminates the redundant second motor unit and its associated control system. By removing this unnecessary component and replacing it with a mechanical linkage system that leverages the single motor's output, the overall system weight is reduced while preserving the essential dual-adjustment functionality through clever mechanical design.
Data Source
AI summary
A single-motor electrically powered bed includes: a bed board, a frame, a slide assembly, a first connecting-rod mechanism, and a drive assembly; the bed board includes: a first bed board and a second bed board, one end of the first bed board being hingedly connected to one end of the second bed board; the second bed board is slidably connected to the frame by means of the slide component, the two ends of the first connecting-rod mechanism are hingedly connected to the first bed board and the frame, respectively, and the first bed board can be raised and lowered by means of the drive assembly. The single-motor electrically powered bed needs only one drive assembly to drive all of the bed boards to move, adjust the position and height of the human body, and achieve the lifting and lowering function of the electrically powered bed.