Cleaning Roller Motor Shell Sealing for Corner Coverage

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Solution Overview

Problem

Existing electric cleaning devices have thick side walls that prevent them from fitting into corners, leading to dead spaces that are difficult to clean, and the motor compartment is prone to water ingress, causing stains and bacterial growth.

Innovation Solution

The electric cleaning device features a housing with a cleaning chamber and a driving assembly that minimizes dead corners by positioning the motor within a sealed shell, using a fixing end and output shaft for support, and includes a sealing mechanism with plugs to prevent water entry, along with a cleaning roller and scouring sponge for effective cleaning.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the side walls of the housing are made thick to accommodate the motor, then the motor is protected, but the device cannot fit into corners and dead spaces are created

Engineering Contradiction:
Improvemotor protectionVSAvoidcleaning coverage area
Core Design Contradiction:
ReliabilityVSArea of stationary object

Solution Approach 1:

The housing is divided into a main body and a separate motor shell. The motor shell is a detachable component that houses the motor, allowing the main cleaning device to have a compact, thin profile for corner cleaning while the motor remains protected in its own enclosed shell.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The motor is nested within the motor shell, which itself is part of the overall housing structure. This nested arrangement allows the motor to be protected without increasing the external dimensions of the main cleaning device, enabling it to fit into corners.

Inventive Principle:
Principle #7Nested doll (Nesting)

2Ease of repair

If the motor compartment is open for easy access, then maintenance is easier, but water can enter and cause stains and bacterial growth

Engineering Contradiction:
Improvemotor accessibilityVSAvoidwater ingress
Core Design Contradiction:
Ease of repairVSObject-affected harmful factors

Solution Approach 1:

The motor shell acts as a protective barrier (flexible shell) that prevents water from reaching the motor. The shell can be detached for maintenance purposes, providing a balance between protection during operation and accessibility during maintenance.

Inventive Principle:
Principle #30Flexible shells and thin films

Solution Approach 2:

The device is segmented into a water-exposed cleaning portion and a water-protected motor portion. The motor shell creates a separate compartment that isolates the motor from water while allowing the cleaning components to remain accessible for maintenance.

Inventive Principle:
Principle #1Segmentation

3Area of stationary object

If the housing is made compact to reduce dead corners, then cleaning effectiveness improves, but the motor may be exposed to water

Engineering Contradiction:
Improvecleaning coverage areaVSAvoidmotor protection
Core Design Contradiction:
Area of stationary objectVSReliability

Solution Approach 1:

The motor is nested within the motor shell, which integrates with the compact housing design. This allows the overall device to maintain a small, corner-friendly profile while the nested motor shell provides the necessary protection.

Inventive Principle:
Principle #7Nested doll (Nesting)

Solution Approach 2:

The motor shell provides a protective barrier without significantly increasing the external dimensions of the device. This thin-film-style protection allows the housing to remain compact for effective corner cleaning while still protecting the motor.

Inventive Principle:
Principle #30Flexible shells and thin films

Data Source

PatentUS11786092B2Electric cleaning device
Publication Date: 2023.10.17 ZHOU YONG
  • US11786092B2 patent drawing
  • US11786092B2 patent drawing
  • US11786092B2 patent drawing

AI summary

An electric cleaning device includes a housing, a cleaning roller and a driving assembly. The housing includes a cleaning chamber and the cleaning chamber defines an opening at bottom. The cleaning roller is arranged at the opening and defines a first accommodating space. The driving assembly is arranged in the first accommodating space and configured to drive the cleaning roller to rotate.