Rotating Stick Locking Unit Damage Prevention
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Solution Overview
Problem
The existing rotating type sticks suffer from locking unit damage when a rotational force is applied, leading to safety concerns and reduced rigidity due to increased diameter differences between tube members, which compromises the stick's durability and reliability.
Innovation Solution
A rotating type stick design featuring a connection member with a button and sleeve system, allowing the second tube member to be rotatably connected while maintaining a locking state, preventing damage from rotational forces and enhancing durability through a spring mechanism and rotation-preventing grooves and protrusions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the locking unit is made more robust to prevent damage from rotational forces, then the reliability improves, but the diameter of the lower tube member decreases relative to the upper tube member, degrading the rigidity of the entire stick
Solution Approach 1:
The locking unit is segmented into a locking protrusion on the lower tube member and a locking groove on the upper tube member, allowing the locking function to be distributed across two separate components rather than requiring a single robust structure. This segmentation enables the locking mechanism to be effective without compromising the overall tube diameter and rigidity.
Solution Approach 2:
A rotation preventing protrusion is introduced as an intermediary element that prevents rotational movement of the lower tube member relative to the upper tube member. This intermediary component addresses the rotational force issue without requiring the locking unit itself to be overly robust, thereby maintaining the stick's rigidity.
2Reliability
If additional structures are added inside the tube member to prevent locking unit damage, then the reliability improves, but the entire stick becomes heavy
Solution Approach 1:
The rotation preventing protrusion is extracted from the internal structure of the tube member and positioned on the outer surface of the lower tube member. This extraction eliminates the need for additional internal structures, thereby preventing weight increase while still providing the necessary protection against rotational forces that could damage the locking unit.
3Reliability
If the locking unit is designed to maintain firm locking state under rotational force, then the reliability improves, but the device complexity increases
Solution Approach 1:
The locking function and rotation prevention function are merged into a single integrated mechanism where the locking protrusion and rotation preventing protrusion work together as a unified system. This merging eliminates the need for separate complex mechanisms, maintaining reliability while avoiding increased device complexity.
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 prevents locking unit damage and maintains the stick's rigidity by allowing the second tube member to rotate freely, ensuring the locking state is maintained even under impact, thus improving user safety and durability.
Implementation Method 1
a spring may be provided between the sleeve and the connection portion
Data Source
AI summary
A stick has a first tube member and a second tube member connected to each other in the length direction; and a connection member connected to one end portion of the second tube member, wherein the first tube member is selectively locked to or unlocked from the connection member, the second tube member is rotatably connected to the connection member. When the first tube member is locked to the connection member, the first tube member and the connection member are fixed to each other, and the second tube member is freely rotatable relative to the first tube member.