Foot Imprinting Device Using Flippable Light Sheet
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Solution Overview
Problem
Conventional foot imprinting devices are time-consuming, inconvenient, prone to ink stains, and heavy, limiting their usability and efficiency, as they require ink and printing paper for single-foot impressions.
Innovation Solution
A foot imprinting device comprising multiple units with a base seat, a colored pad, and a light-transmitting sheet that can be stepped on and flipped to show footprints without ink or paper, allowing simultaneous two-foot impressions and reducing weight by eliminating a metal frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a conventional foot imprinting device with metal frame and rubber sheet is used, then footprints can be obtained, but the device is heavy and inconvenient to carry
Solution Approach 1:
The patent removes the heavy metal frame from the device structure. Instead of using a rigid metal frame to hold the rubber sheet, the invention uses a flexible rubber sheet that can be directly placed on the colored pad, eliminating the need for the heavy metal frame while maintaining the footprint acquisition capability.
Solution Approach 2:
The patent replaces the rigid metal frame with a flexible rubber sheet that can conform to the colored pad surface. This flexible film approach eliminates the heavy metal structure while maintaining the functional integrity of the device, allowing it to be lightweight yet reliable for footprint acquisition.
2Productivity
If ink and printing paper are used in the conventional device, then footprints can be transferred, but the operation is troublesome and time-consuming
Solution Approach 1:
The patent uses a colored pad that directly transfers color to the rubber sheet when stepped on, creating a copy of the footprint without requiring ink and printing paper. This copying mechanism eliminates the multi-step process of ink application and paper placement, significantly speeding up footprint acquisition while simplifying operation.
Solution Approach 2:
The colored pad automatically transfers color to the rubber sheet through direct contact when stepped on, eliminating the need for manual ink application. The system serves itself by using the foot pressure to activate the color transfer mechanism, reducing operational complexity and time requirements.
3Productivity
If a conventional device with single-foot printing capability is used, then footprints can be obtained, but only one foot can be printed at a time
Solution Approach 1:
The patent divides the device into multiple independent imprinting units, each capable of capturing a footprint. This segmentation allows multiple feet to be printed simultaneously without increasing overall device complexity, as each unit operates independently with the same simple colored pad and rubber sheet mechanism.
Solution Approach 2:
The patent designs the imprinting units to be universal and interchangeable, with each unit capable of handling any foot. This multi-functionality allows the device to accommodate multiple feet simultaneously using the same basic mechanism, increasing printing throughput without requiring complex specialized components for each foot.
4Object-affected harmful factors
If the conventional device requires ink coating and paper placement, then footprints can be transferred, but ink may accidentally stain the foot
Solution Approach 1:
The patent eliminates the ink coating step by using a colored pad that directly transfers color to the rubber sheet through mechanical pressure. This copying mechanism removes the liquid ink that could accidentally stain the foot, while maintaining the footprint transfer function through a safer dry or paste-based color transfer system.
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 device is convenient, environmentally friendly, and efficient, enabling quick and accurate determination of foot type without ink or paper, with the ability to reuse the light-transmitting sheets and providing a lightweight design for easier handling.
Implementation Method 1
a light transmitting sheet flippably disposed on and covering the colored pad. The light transmitting sheet is movable between a first state, in which the light transmitting sheet is configured to be stepped on by the person, and a second state, in which the light transmitting sheet is configured to show a footprint of a foot of the person
Data Source
AI summary
A foot imprinting device includes a plurality of foot imprinting units each of which includes a base seat, a colored pad disposed on the base seat, and a light transmitting sheet flippably disposed on and covering the colored pad. The light transmitting sheet is movable between a first state, in which the light transmitting sheet is configured to be stepped on by a person, and a second state, in which the light transmitting sheet is configured to show a footprint of a foot of the person.