Modular Door Opening Device with Telescopic Support Bars
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Solution Overview
Problem
Existing door opening devices are bulky, difficult to transport, and complicated to implement, especially for rescue and emergency services, due to their large and rigid components, which pose risks during interventions and hinder efficient packaging and transport.
Innovation Solution
A door opening device that can be manually dismantled into at least three parts using reversible fixing devices, allowing for easier carrying and assembly, with telescopic extensions to maintain alignment and facilitate compact storage, enabling efficient deployment and transport by a single person.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the door opening device uses large and rigid components to exert sufficient thrust force, then the pushing capability is improved, but the device becomes bulky and difficult to transport
Solution Approach 1:
The device is divided into multiple modular components including a base unit with hydraulic cylinder, intermediate support bar, and upper support bar that can be assembled and disassembled. This segmentation allows the device to maintain sufficient thrust capability when assembled while enabling easy transport when disassembled into smaller manageable parts.
Solution Approach 2:
The support bars are designed with telescopic extensions that can be extended during operation to maintain alignment and provide structural rigidity for force transmission, then retracted for compact storage. This dynamic adjustment allows the device to transition between a compact transport state and a rigid operational state capable of exerting sufficient thrust.
2Reliability
If the device uses fixed rigid components to maintain structural stability, then the reliability is improved, but the packaging and transport efficiency deteriorates
Solution Approach 1:
The structurally stable device is segmented into modular components that can be packaged separately in a compact organized manner. The base unit, support bars, and ancillary components each have designated storage positions, simplifying packaging while maintaining the structural integrity of each component.
Solution Approach 2:
The telescopic support bars utilize nested construction where inner segments are housed within outer segments when retracted, creating a compact configuration for storage and transport. This nesting principle reduces the overall volume required for packaging while maintaining the full extended length needed for operational stability.
3Ease of manufacture
If the device is designed as a single integrated unit for simplicity, then the ease of manufacture is improved, but the transport and storage efficiency deteriorates
Solution Approach 1:
The device is manufactured as separate modular components using standardized parts and interfaces, which simplifies the manufacturing process for each individual component. The modular design allows each part to be produced independently using conventional manufacturing methods, then assembled in the field using the reversible fixing devices.
Solution Approach 2:
The telescopic support bars employ extendable structures that increase the effective length and reach of the device during operation, allowing the same storage volume to achieve greater operational leverage and thrust application distance when extended.
4Volume of moving object
If the device uses telescopic extensions to maintain alignment, then the compactness is improved, but the alignment precision requirement increases
Solution Approach 1:
The intermediate support bar serves as a mediator component that connects the base unit and upper support bar, providing a reference alignment surface and positioning features. This intermediate element facilitates precise alignment between the telescopic sections during assembly, reducing the precision requirements for the telescopic mechanisms themselves.
Solution Approach 2:
The telescopic support bars incorporate self-aligning features such as keyed connections or tapered interfaces that automatically guide the components into proper alignment during assembly. This self-alignment mechanism reduces the need for high-precision manual adjustment and compensates for minor variations in manufacturing tolerances.
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
The present invention relates to a thrust device (1) for opening a door (2), which can be assembled from a ready-to-assemble set of at least three parts (1-1,1-2,1-3) using reversible attachment devices (4c-4d, 7g-7h), which attachment means can be activated and deactivated manually and can maintain lower (4a, 7b) and upper (4b, 7a) portions of lower (4) and upper (7) support bars in alignment.