Hospital Bed Structure Simplified Design Modular Assembly
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Solution Overview
Problem
Conventional hospital beds with pantographic mechanisms and cardan shafts are complex and costly, limiting their scalability and efficiency.
Innovation Solution
A hospital bed structure with a simplified design featuring a structural housing, load cells, and mechanisms using reducer motors, spindles, and dual ramp profiles for angular movement, reducing complexity and production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If pantographic mechanisms and cardan shafts are used in hospital beds, then the bed achieves multiple adjustments and movements, but the device complexity and production cost increase significantly
Solution Approach 1:
The bed structure is divided into modular components: a base unit, an adjustable support plane unit, and a guardrail unit. Each module can be independently manufactured and assembled, reducing overall system complexity while maintaining multiple adjustment capabilities through standardized interfaces and independent actuation of each segment.
Solution Approach 2:
The support plane structure is designed to perform multiple functions: it serves as both the patient support surface and the structural framework for mounting guardrails, while also incorporating the adjustment mechanism. This multi-functionality eliminates the need for separate pantographic mechanisms and cardan shafts, reducing device complexity while maintaining versatility.
2Adaptability or versatility
If pantographic mechanisms and cardan shafts are used in hospital beds, then the bed achieves multiple adjustments and movements, but the production cost increases
Solution Approach 1:
By segmenting the bed into modular units that can be manufactured separately using standard fabrication processes, the production cost is reduced. Each module can be produced in parallel and assembled through standardized connections, eliminating the need for expensive custom-made pantographic and cardan mechanisms.
Solution Approach 2:
The design employs simpler, more cost-effective mechanical components with fewer precision-machined parts. The support plane uses basic hinge connections and simple actuators rather than complex pantographic linkages, making the overall system more economical to manufacture while still achieving the required adjustability.
3Reliability
If conventional hospital bed designs are used, then the bed provides basic functionality, but the design remains essentially unchanged and lacks innovation
Solution Approach 1:
The support plane is designed as a multi-functional element that provides patient support, structural support for guardrails, and adjustment capability. This innovative integration of functions into a single unified structure enhances both reliability and adaptability, representing a significant design advancement over conventional separate-component configurations.
Solution Approach 2:
The bed incorporates dynamically adjustable elements including the tiltable support plane and movable guardrails that can be positioned in multiple configurations. This dynamic design allows the bed to adapt to different patient care needs while maintaining structural reliability, representing an evolution from static conventional designs.
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
The simplified design allows for efficient, cost-effective production of hospital beds with multiple adjustments, enhancing patient care and reducing production costs while maintaining functionality.
Implementation Method 1
a ramp profile which serves as a guide for a moving element of the mechanism, and which is capable of converting a linear movement into an angular movement of the cover
Data Source
AI summary
A hospital bed structure intended to serve as a basic structure for the assembly of hospital beds with multiple adjustments, which allows obtaining a hospital bed that can be used with a special type of mattress and which is able to carry out the multiple bed adjustments. The structure is characterized in that it is defined by four main elements, the first of which is a frame box, which has two sets of bedposts, one front and one rear; the second of which is the support frame, which is mounted on and transversely to the frame box; the third of them is the lower bed frame; and the fourth is the load cells which are mounted between bearing profiles fixed to the side of the frame box and the blocks through which the axles are passed.