Wheeled Housing Footstep Layout for Crossing Level Differences

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Solution Overview

Problem

Existing housing structures with movable supporters face difficulties in safely and easily crossing level differences without lifting the entire housing, especially when conventional methods require significant effort to overcome obstacles.

Innovation Solution

A housing structure with movable supporters and a footstep positioned between two wheels on the opposite side of the advancing direction, allowing the housing to be tilted and safely crossed over level differences by gripping a grip and stepping on the footstep, with the effort point forward of the wheel's ground contact point to suppress rolling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the housing is tilted to cross level differences, then the ability to cross obstacles is improved, but the stability of the housing deteriorates

Engineering Contradiction:

Improveability to cross level differencesVSAvoidstability of the housing

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

A footstep member is introduced as an intermediary element between the operator and the housing. This footstep member provides a stable platform for the operator to apply force, enabling the housing to be tilted for crossing level differences while maintaining operational stability. The footstep member acts as a mediator that transfers the operator's force effectively without compromising housing stability.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If significant force is applied to overcome obstacles, then the ability to cross level differences is improved, but the ease of operation deteriorates

Engineering Contradiction:

Improveability to cross level differencesVSAvoidease of operation

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The footstep member serves as a mechanical intermediary that amplifies the operator's input force. By providing a lever arm and a stable platform, it enables the operator to tilt the housing with minimal effort, making the operation of crossing level differences easy and intuitive without requiring significant physical strength.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If the housing is lifted to cross obstacles, then the ability to cross level differences is improved, but the use of energy deteriorates

Engineering Contradiction:

Improveability to cross level differencesVSAvoidenergy required for lifting

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

Instead of lifting the housing vertically to cross obstacles, the invention inverts the approach by tilting the housing forward. This allows the movable supporters (wheels) to roll over the obstacles while the housing body pivots, significantly reducing the energy required compared to vertical lifting. The operator applies force to tilt the housing, and gravity assists in the crossing motion.

Inventive Principle:

Principle #13The other way round (Inversion)

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

Enables a single operator to safely and easily tilt the housing to cross level differences without lifting it, maintaining stability and minimizing wheel rolling, even when conventional methods require substantial force.

Implementation Method 1

plural movable supporters that are provided on the bottom portion of the housing and support the housing via wheels

Methodology Applied

Scientific EffectFriction: Friction

Implementation Method 2

a footstep that is provided at the bottom portion of the housing between two movable supporters located on the side opposite to the advancing direction of the housing and on which a foot of the operator is able to be hooked when the housing is tilted

Methodology Applied

Scientific EffectLever: Lever

Implementation Method 3

a grip provided on the top portion or at an upper half portion of the side portion of the housing and being capable of being gripped with a hand of an operator when the housing is tilted

Methodology Applied

Scientific EffectFriction: Friction

Data Source

PatentUS12612092B2Housing structure and object using the same

Publication Date: 2026.04.28 FUJIFILM BUSINESS INNOVATION CORP

AI summary

A housing structure for wheeled equipment includes a housing with top, bottom, and side portions. Multiple wheeled supports are mounted on the bottom portion to enable movement of the housing. A grip is positioned on the top portion or upper side portion of the housing for manual grasping during tilting operations. A footstep is located at the bottom portion between two rear wheeled supports on the side opposite the advancing direction. The footstep is positioned forward of the center axis of the rear wheels' diameters relative to the housing's advancing direction. This arrangement allows an operator to step on the footstep while gripping the upper portion to tilt the housing backward, with the rear wheel contact points serving as pivot points during the tilting operation.