Toothed Cable Cap Geometry for Quiet Curved Guide Movement
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Solution Overview
Problem
The generation of tapping sounds due to the collision of a cap on a toothed cable with a guide member during movement is a common issue in conventional systems.
Innovation Solution
A toothed cable design that includes a cap with a conical tip and a cylindrical body portion, where the end region of the cable body contacts the inner wall of the guide member to limit the swing angle of the cap, reducing the likelihood of collision and sound generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cap is designed with a conical tip and cylindrical body portion to guide the toothed cable, then the toothed cable can move smoothly through the guide member, but the cap collides with the guide member at concave portions causing tapping sounds
Solution Approach 1:
The patent applies beforehand cushioning by providing a cushioning member (elastic element) between the cap and the guide member at the concave portion. This cushioning member absorbs the impact energy when the cap approaches the concave portion, preventing direct collision and the resulting tapping sound. The elastic element deforms during impact and restores, providing a缓冲 effect that eliminates the harmful noise while maintaining smooth cable movement.
2Object-generated harmful factors
If the end region of the cable body contacts the inner wall portion to limit cap swing angle, then collision with guide member is reduced, but the cable body experiences increased contact force with the guide member
Solution Approach 1:
The patent introduces an intermediary approach where the end region of the cable body acts as a mediator to limit the swing angle of the cap. By constraining the cable body's movement against the inner wall portion, the system prevents the cap from swinging into collision with the outer wall portion. This intermediary constraint redistributes the forces, reducing peak collision forces while maintaining acceptable contact forces during normal operation.
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 effectively suppresses the generation of tapping sounds by minimizing the swing angle and reducing the force of collision between the cap and the guide member, ensuring smooth operation.
Implementation Method 1
the end region of a cable body, which end region is on the side of the cap, contacts the inner wall portion of the guide member when the cap comes into sliding contact with an edge of the concave portion
Implementation Method 2
when the toothed cable moves in a direction from a side of the cap toward a side of the cable body in the curved guiding path of the guide member, the cap moves so as to be in sliding contact with the outer wall portion
Data Source
AI summary
A toothed cable includes a cable body, and a cap provided at a tip of the cable body. The cap includes a conical tip portion, and a cylindrical body portion provided on a side of a base end of the tip portion, when the toothed cable moves in a direction from a side of the cap toward a side of the cable body in a curved guiding path of a guide member, the cap moves so as to be in sliding contact with an outer wall portion, and the toothed cable is configured such that an end region of the cable body, which end region is on the side of the cap, contacts an inner wall portion of the guide member when the cap comes into sliding contact with an edge of a concave portion of the guide member to limit an angle θ at which the cap swings.