Foldable Dust Collection Device for Hand Tools
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Solution Overview
Problem
Existing dust collection devices for hand-held power tools, such as saws, often require a fan to inflate filter bags for effective dust collection, leading to bulkiness when not in use and inefficient storage, especially when there is no fan or small fan available for dust removal.
Innovation Solution
A flexible dust container with a support structure that unfolds to maximize dust collection space, utilizing elastic walls and a spring arrangement to maintain the unfolded position during use and fold for compact storage, allowing for effective particle collection without a fan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid retaining bracket is used to maintain the dust container shape, then the dust collection chamber remains stable, but the device becomes cumbersome and occupies excessive storage space
Solution Approach 1:
The support structure is designed to be dynamically adjustable between an extended configuration during operation (providing stability) and a retracted configuration during storage (minimizing volume). This dynamic transformation allows the same structure to serve dual purposes without compromise.
Solution Approach 2:
The support structure elements are designed to nest within each other when retracted, similar to nested dolls. The legs and bracing elements collapse into a compact arrangement that fits within the dust container's footprint, dramatically reducing storage volume while maintaining structural integrity when deployed.
2Volume of stationary object
If the dust container is made flexible to reduce storage space, then storage efficiency improves, but the collection volume may not be sufficient without a blower
Solution Approach 1:
The dust container transitions from a compact flexible state during storage to an expanded rigid-supported state during operation. The flexible material allows collapse for storage, while the deployable support structure provides the necessary rigidity and volume expansion when in use.
Solution Approach 2:
The dust container is constructed from flexible materials such as textile or plastic that can be folded and collapsed. These flexible shells maintain structural integrity when collapsed but can be expanded to full volume when supported by the deployed support structure, eliminating the need for a blower to maintain shape.
3Productivity
If a blower is added to inflate the filter bag for effective dust collection, then dust collection efficiency improves, but the device becomes bulkier and requires more storage space
Solution Approach 1:
The blower component is completely removed from the system. Instead of using mechanical inflation, the invention relies on the flexible container's ability to expand under its own weight when supported by the deployable support structure, eliminating the need for active inflation devices.
Solution Approach 2:
The dust container self-inflates through gravity and the mechanical deployment of the support structure. The flexible material naturally expands to its full volume when the support legs are extended, requiring no external power source or active inflation mechanism.
4Stability of the object's composition
If the support structure is made fixed to ensure stability, then structural integrity is maintained, but the device cannot be compacted for transport
Solution Approach 1:
The support structure incorporates movable joints and hinged connections that allow transformation between a stable extended configuration during operation and a compact folded configuration during transport. The dynamic design maintains structural integrity when deployed while enabling compact storage when retracted.
Solution Approach 2:
The support structure is divided into multiple segmented legs and bracing elements that can independently fold and collapse. This segmentation allows each component to be compacted efficiently while maintaining the overall structural stability when all segments are deployed and locked into position.
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 solution enables efficient dust collection without a fan, maintaining a large dust collection volume during use while minimizing storage space when not in use, enhancing user convenience and tool ergonomics.
Implementation Method 1
The dust collection device has a spring assembly that biases the support structure towards the operating position, so that the support structure can be moved into the non-operating position against the force of the spring assembly.
Implementation Method 2
The spring assembly can, for example, comprise one or more springs that act directly on the supporting structure. Possible springs include coil springs, elastic bands, or similar components.
Data Source
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AI summary
The invention relates to a dust collection device (30) for a hand-held power tool (10), in particular for a saw (11), which has a dust inlet (35) and a connection device (31) for attachment to a machine dust outlet (19) of the hand-held power tool (10), so that the machine dust outlet (19) communicates with a dust inlet (35) of the dust collection device (30) and particles (P) flowing out of the machine dust outlet (19) can flow into a dust collection chamber (34) of a flexible dust container (32) of the dust collection device (30), wherein the flexible dust container (32) has flexible walls and is foldable to reduce its external volume, and wherein the dust collection device (30) has a support structure (33) for holding the flexible dust container (32).It is provided that the support structure (33) is adjustable between a non-use position (N) and a use position (G) intended for the use of the dust collection device (30), wherein the support structure (33) has a smaller storage volume in the non-use position (N) compared to the use position (G) and in the use position (G) holds the flexible dust container (32) in an unfolded state, so that the dust collection chamber (34) provides a larger receiving volume for receiving the particles (P) compared to the folded position.