Robot Cleaner Bumper Interlock Design for Obstacle Detection Coverage
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Solution Overview
Problem
Current robot cleaners face challenges with reduced suction force, separation of brush rollers, increased collision probability of the suction unit with obstacles, blind spots in sensing, and inconvenient HEPA filter replacement, which affect their efficiency and usability.
Innovation Solution
The design includes a suction unit protruding from the cleaner body to reduce collision risk, a sensing unit that overlaps with the suction unit for obstacle detection, and a modular dust container system with easy assembly and filter access, allowing for improved navigation and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the suction unit protrudes from the cleaner body, then the suction force is improved and brush roller separation is enabled, but the collision probability with obstacles increases
Solution Approach 1:
The suction unit is separated from the main cleaner body as an independent protruding module, allowing it to be optimized for cleaning performance while being equipped with its own collision sensing capability. This segmentation enables the suction unit to function independently in terms of both cleaning and obstacle detection.
Solution Approach 2:
A collision sensing part is integrated into the protruding suction unit that provides real-time feedback about obstacles. When the sensing part detects a collision or potential collision, it sends signals to the control unit, which then adjusts the driving unit to avoid the obstacle, creating a closed-loop feedback system that resolves the collision risk.
2Productivity
If the suction unit protrudes from the cleaner body, then cleaning performance is improved, but the suction unit is located in a blind spot of the sensing unit
Solution Approach 1:
The sensing system is divided into two parts: a main sensing unit on the cleaner body for general obstacle detection, and a collision sensing part specifically on the protruding suction unit for detecting obstacles in the previously blind area. This segmentation of the sensing system eliminates blind spots while maintaining the cleaning advantages of the protruding design.
Solution Approach 2:
The sensing coverage is extended from a single location to multiple locations by placing sensing elements both on the main body and on the protruding suction unit. This multi-dimensional sensing arrangement ensures complete coverage of all areas, including the previously blind zones in front of the protruding unit.
3Productivity
If the HEPA filter is integrated into the cleaner body, then filtration is effective, but disassembly is required for filter replacement or cleaning
Solution Approach 1:
The HEPA filter is extracted from the cleaner body and relocated to the dust container. This allows the filter to be accessed, removed, and cleaned simply by detaching the dust container, eliminating the need to disassemble the cleaner body while maintaining effective filtration through the HEPA filter's integration with the dust collection system.
4Reliability
If the dust container has a complex coupling structure, then assembly is secure, but accurate assembly and easy assembly become difficult
Solution Approach 1:
The coupling structure uses asymmetric designs such as inclined protrusions that guide the dust container into the correct position during assembly. The inclined surfaces provide natural alignment, ensuring accurate assembly without requiring complex adjustment mechanisms or high-precision manufacturing tolerances.
Solution Approach 2:
The coupling structure is designed so that the dust container naturally settles into a stable, pre-aligned position through its geometric features. The interlocking protrusions and recesses are positioned to automatically guide components into their correct relative positions, making the assembly process straightforward and accurate.
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
Enhances the robot cleaner's ability to avoid obstacles, maintain suction efficiency, and simplify maintenance, leading to more effective cleaning and user-friendly operation.
Implementation Method 1
a flow separating part extending downwardly inclined along the inner circumference of the dust container
Data Source
AI summary
A robot cleaner comprising: a first housing including a controller and a driving wheel of which driving is controlled by the controller; a second housing provided at one side of the first housing, the second housing having a brush module or mop module mounted thereto; a front bumper provided at a front portion of the second housing, the front bumper configured to be movable to the inside of the second housing when the front bumper is in contact with an obstacle; at least one sensing means provided at the inside of the front bumper to sense a movement of the front bumper to the inside of the second housing; side bumpers respectively provided at left and right side portions of the second housing, the side bumpers each being configured to movable to the inside of the second housing when the side bumper is in contact with an obstacle; and a link member provided at the inside of the side bumper to allow the side bumper and the front bumper to interlock with each other such that, when the side bumper is moved to the inside of the second housing, at least one portion of the front bumper is moved together with the side bumper to the inside of the second housing.