Suction Nozzle Cam Mechanism for Carpet Hair Disentangling
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Solution Overview
Problem
Conventional vacuum cleaners are ineffective in removing long thin contaminants like human hair and pet fur from surfaces, especially carpets, due to tangling with fibers, requiring mechanical disentanglement before suction.
Innovation Solution
A suction nozzle with a fur-removing member featuring rotatable pins and rotation cams that scrape and separate long thin contaminants, allowing them to be directed into the suction port, combined with a rotation brush for enhanced cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If only suction force is used to clean the surface, then the vacuum cleaner structure is simple, but long thin contaminants such as human hair or pet fur cannot be removed effectively
Solution Approach 1:
The patent combines suction function and mechanical scraping function into a single integrated suction nozzle. The fur-removing member with rotatable pins is integrated into the nozzle body, allowing simultaneous mechanical disentanglement and suction of contaminants in one device, thereby improving contaminant removal effectiveness while maintaining relatively simple device structure.
Solution Approach 2:
The fur-removing member is designed to rotate automatically based on the movement direction of the suction nozzle. When the nozzle moves forward, the pins rotate to scrape contaminants; when moved backward, they rotate to a non-contact position. This dynamic adjustment allows the device to adapt its cleaning action to the operating condition, improving effectiveness without requiring complex control mechanisms.
2Reliability
If fur-removing members are added to mechanically disentangle contaminants, then contaminant separation effectiveness is improved, but device complexity increases
Solution Approach 1:
The rotation cams are designed to automatically control the rotation of the fur-removing member based on the natural movement of the suction nozzle during cleaning operations. The mechanism uses the forward and backward movement of the nozzle itself to drive the rotation of pins through the cam profile, eliminating the need for external motors or complex control systems. This self-service approach improves contaminant separation effectiveness while minimizing the increase in device complexity.
3Productivity
If the leading end of the fur-removing portion contacts the surface continuously, then scraping effectiveness is improved, but the pins may become clogged with contaminants
Solution Approach 1:
The rotation cam mechanism causes the fur-removing pins to periodically contact and then lift from the surface during each forward movement cycle. The cam profile is designed so that pins engage the surface to scrape contaminants, then automatically lift away to prevent clogging, creating a periodic contact-noncontact action pattern. This periodic motion maintains scraping efficiency while preventing contaminant accumulation on the pins.
Solution Approach 2:
The fur-removing member dynamically adjusts its contact with the surface through automatic rotation driven by the rotation cam. During forward movement, pins rotate to contact the surface for scraping; during backward movement, they rotate to a lifted position. This dynamic adjustment ensures optimal scraping contact while preventing continuous contact that would cause clogging, thereby maintaining both scraping efficiency and pin functionality.
Data Source
AI summary
The present disclosure relates to a suction nozzle for a vacuum cleaner, which includes a nozzle body having a contaminants suction port formed on a bottom surface thereof, and a fur-removing member having a fur-removing body rotatably disposed at a side of the contaminants suction port on the nozzle body, a fur-removing portion formed in a plurality of pins vertically to the fur-removing body, and a plurality of rotation cams, wherein when the nozzle body moves in a first direction, the plurality of rotation cams forces the fur-removing body to rotate so that a leading end of the fur-removing portion is spaced apart from a surface to be cleaned.