Telescopic Tool Positioning Device for Secure Locking
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Solution Overview
Problem
Current telescopic tools do not provide a reliable locking mechanism, leading to unintended loosening when force is applied to the coupling sleeve, and they do not allow users to hold the coupling sleeve or change the working end of the handle.
Innovation Solution
A telescopic tool with a positioning device mounted between two rods, featuring a switch controller, positioning member, and fixing member, allowing both hands to grip separate portions and enabling secure locking and easy operation of the switch controller, preventing loosening and allowing for working end changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a coupling sleeve is used to connect the handle and extension rod, then the tool can be extended, but the connection becomes loose when force is applied to the coupling sleeve
Solution Approach 1:
The coupling sleeve is divided into an outer sleeve and an inner sleeve that can move relative to each other. The positioning device with switching member creates segmented positioning positions, allowing the inner sleeve to lock at different locations along the outer sleeve, providing both extension capability and stable locking.
Solution Approach 2:
The coupling sleeve transitions from a static connection to a dynamic one with multiple positioning positions. The switching member can be moved to engage with different positioning holes in the outer sleeve, allowing the connection to adapt between locked and extendable states while maintaining stability in each position.
2Ease of operation
If the coupling sleeve is made grippable by hand, then user control is improved, but the structure becomes more complex
Solution Approach 1:
The grip portion is merged with the outer sleeve of the coupling device, combining the gripping function with the structural component. This integration allows users to directly grip the outer sleeve for control while maintaining a relatively simple overall structure without adding separate complex gripping mechanisms.
3Reliability
If a positioning device with switching member is added, then locking reliability is improved, but the device complexity increases
Solution Approach 1:
The switching member serves multiple functions: it engages with positioning holes to provide reliable locking, can be manually moved to switch between positioning positions, and integrates with the inner sleeve structure. This multi-functionality achieves reliable locking without proportionally increasing device complexity.
Data Source
AI summary
A telescopic tool includes a positioning device mounted between first and second rods. The first rod includes a longitudinal hole extending along a longitudinal axis, a first positioning hole intercommunicating with the longitudinal hole, and a first gripping portion. The second rod is movably received in the longitudinal hole, includes a plurality of second positioning holes, and is movable relative to the first rod along the longitudinal axis to align the first positioning hole with one of the plurality of second positioning holes. A switch controller is movable relative to the first rod and is movably coupled to a positioning member. The positioning member movably extends through the first hole and is releasably engaged in one of the plurality of second positioning holes in response to movement of the switch controller relative to the first rod. A fixing member includes a second gripping portion mounted around the first rod.