Wall Chaser Swivel Handle for Edge Cutting Ergonomics
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Solution Overview
Problem
Existing wall chasers used for creating slots in masonry for electrical installations face ergonomic operability challenges due to their weight and design, which affects performance and compactness, especially when cutting edges.
Innovation Solution
A wall chaser design featuring a swivel locking device for the transverse handle, positioned in the drive section, allowing for ergonomic adjustment without compromising edge cutting, utilizing the space created by the drive section's offset orientation to enhance user engagement and compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the transverse handle is arranged offset rearward to allow easy cutting in edge regions, then edge cutting performance is improved, but ergonomic operability and user engagement are worsened
Solution Approach 1:
The transverse handle is made adjustable between a front position and a rear position. In the rear position, it allows easy cutting in edge regions by being offset rearward. In the front position, it provides optimal ergonomic engagement for the user's hand. The handle can be shifted between these positions using a swivel locking device, allowing the user to adapt the handle position to the specific task at hand.
Solution Approach 2:
The position of the transverse handle along the longitudinal axis of the wall chaser is changed as a variable parameter. By adjusting the handle's position between front and rear locations, the device can optimize both ergonomic operability and edge cutting performance depending on the operational requirements.
2Volume of moving object
If the drive section is set back relative to the tool section to enhance compactness, then device compactness is improved, but space for handle adjustment mechanism is worsened
Solution Approach 1:
The swivel locking device utilizes the transverse dimension (width) of the drive section to accommodate the adjustment mechanism. The locking device includes a locking lever that extends transversely and engages with a locking surface on the transverse handle, allowing the handle position to be secured without requiring additional longitudinal space that would compromise compactness.
3Ease of operation
If the transverse handle is made adjustable for optimal ergonomic engagement, then ease of operation is improved, but device complexity and compactness are worsened
Solution Approach 1:
The swivel locking device is designed to be actuated by the user's own hand during normal operation. The actuating button is positioned such that the user can release the locking mechanism and adjust the handle position without requiring additional tools or complex mechanisms. The spring-loaded locking lever automatically engages when the handle is positioned, providing self-locking functionality.
Data Source
AI summary
The invention is directed to a wall chaser (10) for producing slots or similar recesses in masonry or the like, wherein a drive section (1) having a drive motor (2) and gear unit (3) connected on the output side and a tool section (4) having a cutting disk arrangement (5) are oriented substantially next to one another and in each case in the cutting/feed direction. In order to optimize the ergonomics for the user without impairing the cutting in edges it is proposed to assign a swivel locking device (17) to a transverse handle (16), wherein the transverse handle can thereby be pivoted and locked between a front and a rear position about a geometric swivel axis (18) set back relative to the front side of the tool section (4) with respect to the cutting/feed direction.