Spinning Knob With Tripping Pushing Member
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Solution Overview
Problem
Conventional spinning knobs can become nonfunctional when forced to rotate after abutting against an object, as it can damage the threads of the knob or screw, leading to abrasion.
Innovation Solution
A spinning knob design featuring a shell, a rotation member with threaded portions, and a pushing member that allows the shell and rotation member to rotate simultaneously by creating circumferential interference, which trips the pushing member away when the rotation member abuts against an object, preventing further rotation and thus avoiding thread abrasion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the knob is forced to rotate after abutting against the object, then the fastening function is maintained, but the threads of the knob or screw may damage leading to nonfunctionality
Solution Approach 1:
The knob is divided into two independent rotatable parts: the shell and the rotation member. The rotation member is threaded and screws onto the screw, while the shell can rotate independently around the rotation member. This segmentation allows the rotation member to remain stationary relative to the screw while the shell rotates, preventing thread damage.
Solution Approach 2:
The invention introduces a dynamic structure where the rotation member can be rotated relative to the shell during fastening, and then the shell can spin freely around the stationary rotation member after fastening is complete. This dynamic behavior allows the system to transition from a rigid connected structure to a freely rotatable configuration, avoiding forced rotation damage.
2Ease of operation
If the knob is moved away from the object by rotating the knob, then the object is released, but the threads may wear down with repeated use
Solution Approach 1:
By separating the rotation function into two independent components (rotation member for fastening/unfastening and shell for spinning), the threaded connection is only engaged during the necessary fastening and unfastening operations, while the shell handles all decorative spinning movements, reducing cumulative thread wear.
Solution Approach 2:
The rotation member acts as an intermediary between the shell and the screw. It transfers the rotational motion from the shell to the screw during fastening, but remains stationary during decorative spinning, protecting the screw threads from unnecessary wear while still enabling easy operation.
Data Source
AI summary
The spinning knob includes a shell, a rotation member, and a pushing member. The rotation member is rotatably disposed on the shell. The rotation member includes a threaded portion for screwing with a screw. The pushing member is arranged on the shell and tends to abut against the rotation member to have circumferential interference with the rotation member so that the shell and the rotation member may rotate simultaneously. When the rotation member is screwed to the screw sufficiently and an end of the rotation member abuts against an object, if the shell is further rotated, the rotation member obliquely abuts against the pushing member to make the pushing member trip away from the rotation member so that the pushing member has no circumferential interference with the rotation member and that the shell is rotatable with respect to the rotation member.