Vacuum Filter Cover Interlock for Missing-Filter Prevention
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Solution Overview
Problem
Vacuum cleaners often operate without a filter, leading to fine dust being introduced into the fan motor, causing potential problems, as users may inadvertently close the filter cover without installing a new filter.
Innovation Solution
A dust collecting apparatus with a closing prevention rib mechanism that prevents the filter cover from closing if no filter is installed, using a rotatable contact part that slides along the filter or filter installation part and is restricted by a catching rib, alerting the user to the missing filter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the filter cover is made easily openable for filter replacement, then the ease of operation is improved, but the risk of accidental closing without filter increases
Solution Approach 1:
The closing prevention rib is designed to protrude and block the closing path of the filter cover before it can accidentally close. This preliminary obstructive action prevents the harmful event (closing without filter) from occurring in the first place, while not interfering with intentional closing when filter is installed
2Reliability
If a complex locking mechanism is added to prevent accidental closing, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The protection function is segmented into separate geometric elements (closing prevention rib and catching rib) rather than using a complex integrated locking mechanism. This segmentation allows each element to perform a specific simple function, reducing overall complexity while maintaining reliability
Solution Approach 2:
The system uses the presence or absence of the filter itself as the key to enable or disable closing. The filter physically blocks the catching rib when installed, automatically enabling closing. When removed, the catching rib is exposed and automatically prevents closing. This self-service mechanism eliminates the need for sensors, switches, or complex control systems
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
Prevents the vacuum cleaner from operating without a filter, thus avoiding potential damage to the fan motor and allowing users to recognize and correct the absence of a filter, thereby maintaining the device's functionality and reducing manufacturing costs.
Implementation Method 1
the closing prevention rib slides along the upper surface of the filter so that the filter case closes, and when the filter is not installed and the closing prevention rib contacts with an upper surface of the filter installation part while closing the filter case, the closing prevention rib slides along the upper surface of the filter installation part and is restricted by the catching rib
Implementation Method 2
a dust separating chamber which separates dust from the air sucked through the inlet part
Implementation Method 3
a filter disposed at an upper portion of the housing so as to filter fine dust contained in the air passing through the dust separating chamber
Data Source
AI summary
A dust collecting apparatus in which, when a filter cover is attempted to be closed in a state in which the filter is not installed, the filter cover is prevented from closing by a simple configuration, and a vacuum cleaner having the same. The dust collecting apparatus includes a filter, a cover including a filter installation part in which the filter is installed and a catching rib which is provided at the filter installation part, and a filter cover which covers an upper portion of the cover, and the filter cover includes a closing prevention rib which is restricted by the catching rib so as to prevent the filter cover from closing when the filter is not installed.