Friction Reduction Member for Parallel Guide Ruler Fixing
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Solution Overview
Problem
Existing portable cutting devices face issues with precise adjustment of parallel guide rulers due to friction-induced dents and positional offsets, making fine adjustments challenging.
Innovation Solution
Incorporation of a ruler-fixing device with a rotatable operation member and a friction reduction member, such as a ball bearing or synthetic resin bearing, to reduce friction and prevent dents, allowing for precise positioning of the parallel guide ruler.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the tip of the fixing screw presses the connection bar directly, then the connection bar can be fixed to the base, but friction between the fixing screw and connection bar causes the connection bar to move and dents to form on the connection bar
Solution Approach 1:
A friction reduction member (such as a ball bearing or synthetic resin bearing) is introduced as an intermediary between the fixing screw and the connection bar. This mediator reduces friction during the fixing process, preventing the connection bar from moving along with screw rotation and preventing dent formation, while still achieving reliable fixation.
2Manufacturing precision
If a sheet metal support member is used to prevent dents on the connection bar, then dent formation is reduced, but friction caused by surface contact still causes offset of the connection bar
Solution Approach 1:
The friction reduction member replaces the traditional sheet metal support member contact mechanism. Instead of relying on surface contact friction, the patent uses rolling friction (ball bearing) or low-friction material contact (synthetic resin bearing) to dramatically reduce friction during the fixing process, thereby preventing connection bar offset while maintaining surface integrity.
3Reliability
If the fixing screw rotates to tighten the connection bar, then the connection bar is secured to the base, but friction causes the connection bar to move in accordance with screw rotation
Solution Approach 1:
The friction reduction member serves as a mediator that decouples the rotational motion of the fixing screw from the connection bar. During tightening, the friction reduction member allows the screw to rotate and apply clamping force without transmitting rotational friction to the connection bar, enabling precise adjustment before final fixation.
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 accurate and fine adjustment of the parallel guide ruler, preventing dents and positional offsets, thereby enhancing the precision and reliability of cutting operations.
Implementation Method 1
a friction reduction member, such as a ball bearing or synthetic resin bearing, to reduce friction
Implementation Method 2
a friction reduction member, such as a ball bearing or synthetic resin bearing, to reduce friction and prevent dents
Data Source
AI summary
A pressing member is rotatably supported by a fixing screw shaft via a ball bearing. The pressing member is made of synthetic resin and is larger in diameter compared to that of the fixing screw shaft. A connection bar is pressed by the pressing member by fastening the fixing screw shaft, and the position of the connection bar is thereby fixed. Because the pressing member has a large diameter, a dent is not generated on the connection bar. Furthermore, because the pressing member is not rotated in the fixed position, the position of the connection bar is not offset, enhancing the ability of fixing the connection bar with precise adjustment.