Vacuum Ground Brush Cover With Torsion-Spring Opening and Safe Brushroll Stop
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Solution Overview
Problem
The existing vacuum cleaners have issues with the brushroll cover falling down when opened, leading to inconvenient replacement and potential user injury due to the brushroll still being operational during cover opening.
Innovation Solution
A ground brush design with a rotating shaft and torsional spring that allows the brushroll cover to open automatically, featuring snap connections and elastic members for secure attachment, and a microswitch to control the brushroll's operation, ensuring it stops when the cover is opened.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the brushroll cover is rotatably connected to the ground brush body through a rotating shaft, then the brushroll cover can be opened for maintenance, but the brushroll cover easily falls down when opened
Solution Approach 1:
A torsional spring is installed on the rotating shaft to provide preliminary counteracting force against gravity. When the brushroll cover is opened, the torsional spring automatically generates a lifting moment to prevent the cover from falling down, thus solving the stability problem while maintaining ease of operation.
Solution Approach 2:
The torsional spring changes the mechanical parameter of the rotating shaft system by introducing elastic torque. This parameter change allows the rotating shaft to not only transmit rotation but also provide active support force, preventing the brushroll cover from falling during the open state.
2Device complexity
If the brushroll is mounted in the brushroll cover with a simple rotating connection, then the structure is simple, but the brushroll easily falls out when the cover is opened
Solution Approach 1:
The brushroll mounting structure is segmented into multiple functional components: the rotating shaft for rotation, the torsional spring for retention, and the snap groove for positioning. This segmentation allows each component to perform its specific function, ensuring the brushroll remains securely mounted while maintaining structural simplicity.
Solution Approach 2:
The snap groove acts as an intermediary structure between the brushroll and the brushroll cover. It provides a reliable engagement point that prevents the brushroll from falling out when the cover is opened, while not significantly increasing the overall device complexity.
3Productivity
If the brushroll continues to work when the brushroll cover is opened, then the vacuum cleaner can continue operating, but it may injure the user accidentally
Solution Approach 1:
A microswitch is installed to detect the opening state of the brushroll cover and provide feedback to the control system. When the cover is opened, the microswitch automatically cuts off power to the brushroll motor, preventing user injury. This feedback mechanism ensures safety while allowing the vacuum cleaner to resume operation after the cover is closed.
4Device complexity
If the brushroll needs to be replaced by turning over the ground brush, then the structure is simple, but the operation is tedious and inconvenient
Solution Approach 1:
The brushroll cover is designed to be dynamically openable, transforming the static replacement process into a dynamic operation. Users can simply open the brushroll cover to access and replace the brushroll, eliminating the need to turn over the entire ground brush. This dynamic design significantly improves replacement convenience without significantly increasing structural complexity.
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
The design prevents the brushroll from falling and simplifies replacement, enhances user safety by ensuring the brushroll stops when the cover is opened, and improves operational convenience.
Implementation Method 1
the rotating shaft is provided with a torsional spring, and the torsional spring is configured to make the second end of the brushroll cover normally rotate towards a direction away from the ground brush body
Implementation Method 2
the ground brush body is provided with at least one snap cooperating with the at least one snap groove, and the at least one snap has a first end protruding a side wall of the first mounting groove and snapped into the at least one snap groove
Data Source
AI summary
A ground brush (1) for a vacuum cleaner includes a ground brush body (10), a brushroll cover (20), and a brushroll assembly (30). The ground brush body (10) is provided with a first mounting groove (101), in which the first mounting groove (101) has an upper opening and a lower opening in communication with each other. The brushroll cover (20) covers on the ground brush body (10), has a first end rotatably connected with the ground brush body (10) and a second end snapped into the ground brush body (10), and has a second mounting groove (201), in which the first mounting groove (101) and the second mounting groove (201) cooperate to form a mounting space. The brushroll assembly (30) includes a brushroll (3) and a driving assembly (302), in which the brushroll is mounted in the mounting space.