Hand-Held Tool Housing With Chip Outlet and Protective Bottom
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Solution Overview
Problem
Existing hand-held electric tools pose safety risks due to open bottoms allowing user contact with high-speed operating components and ejected chips, and instability during operation.
Innovation Solution
A hand-held electric tool with a substantially closed bottom featuring a chip removal hole and protective portion, along with rest blocks for improved stability and safety, including a first rest block for user fingers and a second for the object to be worked.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the bottom of the housing is fully open for chip removal, then chip removal efficiency is improved, but user safety deteriorates due to contact risk with high-speed components
Solution Approach 1:
The bottom wall is segmented by providing a dedicated chip removal hole rather than a fully open bottom. This segmentation allows chips to be removed through a controlled opening while the rest of the bottom remains closed to prevent contact with high-speed components, thus resolving the contradiction between chip removal efficiency and user safety
Solution Approach 2:
A protective portion is introduced as an intermediary element between the chip removal hole and the user's hand. This protective structure blocks ejected chips from reaching the user while allowing chips to be removed from the housing, thus maintaining chip removal efficiency while improving user safety
2Ease of manufacture
If the housing structure is simplified, then manufacturing ease is improved, but operational stability deteriorates due to shaking during use
Solution Approach 1:
Rest blocks are pre-positioned on the housing at locations that provide optimal stability during operation. These rest blocks allow the user to rest their hand or the workpiece, creating preliminary contact points that stabilize the tool before operation begins, thus improving operational stability without complicating the housing structure
Solution Approach 2:
The dimensions and positions of rest blocks are optimized to improve stability. By carefully selecting the size, shape, and location of these simple structural elements, operational stability is enhanced while maintaining manufacturing simplicity
3Stability of the object's composition
If the first rest block is added for user finger support, then operational stability is improved, but device complexity increases
Solution Approach 1:
Instead of making the entire housing complex, only local areas are modified by adding rest blocks at specific positions where stability is needed. This localized approach improves operational stability while minimizing the increase in overall device complexity
Data Source
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AI summary
The present invention provides a hand-held electric tool comprising a housing and an operating component. The housing has a main body section and a grip section extending from the rear side of the main body section, and the front end of the main body section is provided with a mounting interface. The operating component is mounted at the mounting interface of the housing and protrudes from the housing. A chip removal hole is formed in the bottom wall of the main body section of the housing, and a protective portion that extends downwards at least partially is provided at the bottom end at the position where the main body section joins the grip section. The bottom of a hand-held electric tool of the present invention is substantially closed, except for being provided with a chip removal hole, which allows removal of chips while preventing a user's hand from being inadvertently extended into the housing and contacting a component operating at a high speed. Moreover, chips removed through the chip removal hole are blocked by the protective portion, without reaching the grip section, which offers considerable advantages in terms of safety and hygiene.