Portable Height Measuring Device with Retractable Paper Roll
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Solution Overview
Problem
Conventional height measuring devices are bulky, securely affixed to walls, and expensive, making them difficult to move and use for recording height data over time without damaging walls or losing the device.
Innovation Solution
A portable device detachably coupled to a wall or door, featuring a paper roll mechanism where the paper is extended to mark height and then retracted into the device for storage, allowing easy data recording and retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If height measuring devices are securely affixed to walls, then measurement stability is improved, but device portability deteriorates
Solution Approach 1:
The device transitions from a static wall-mounted state to a dynamic portable state. The housing can be detachably coupled to walls or doors when needed for stable measurements, but can also be easily removed and transported to different locations, allowing the device to adapt its mounting state based on operational needs.
2Productivity
If paper is continuously extended for height marking, then measurement recording capability is improved, but paper lifespan deteriorates
Solution Approach 1:
The paper is extended from the roll when needed to mark height measurements on the wall, then retracted back into the housing. This allows the paper to be reused multiple times - each extension-retraction cycle enables new measurements while preserving the paper for future use, significantly extending its operational lifespan compared to disposable marking methods.
Solution Approach 2:
The paper transitions from a retracted stored state to an extended active state during measurement, then returns to the retracted state. This dynamic deployment allows the paper to serve its marking function only when needed, preserving it for repeated use cycles rather than continuous consumption.
3Ease of operation
If paper is left extended for height marking, then measurement accessibility is improved, but paper protection from damage deteriorates
Solution Approach 1:
After height measurements are marked on the wall, the paper is retracted back into the protective housing. This protects the paper from environmental damage such as moisture, dust, and physical damage while maintaining easy accessibility during actual measurement operations.
Solution Approach 2:
The housing provides protective cushioning for the paper when not in use, shielding it from harmful environmental factors. This beforehand protection ensures the paper remains intact and usable for future measurements, preventing damage before it can occur.
Data Source
AI summary
A device for measuring and/or marking height is disclosed. The device comprises a rear section, side sections coupled to the rear section. Further, the device comprises a front section coupled to the side sections. The side sections comprise a rod receiving section. Further, the device comprises a rod coupled to the rod receiving sections. The device comprises a paper wound onto the rod, in which one end is coupled to the rod. The device is coupled to a wall or a door at a height from the ground and free end of paper is pulled down to mark height of a user and the paper is made to retrieve into the device when not in use.