Telescopic Tool Positioning Device Locking Mechanism
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Solution Overview
Problem
Current telescopic tools do not allow reliable locking and are prone to loosening when force is applied to the coupling sleeve, and they do not permit easy change of the working portion on the handle.
Innovation Solution
A telescopic tool with a positioning device between two rods, including a switch controller, positioning member, fixing member, and resilient biasing member, which allows for secure locking and easy operation by enabling both hands to grip the tool and switch between locking and releasing positions.
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 tool becomes prone to loosening when force is applied to the coupling sleeve
Solution Approach 1:
The tool is divided into segmented sections (handle, coupling sleeve, extension rod) that can be independently positioned and locked. The positioning device segments the locking function into discrete positioning holes and positioning members, allowing precise location locking while maintaining overall tool integrity and preventing loosening under force.
2Strength
If the coupling sleeve is made rigid for structural stability, then the tool maintains strength, but the user cannot easily change the working portion on the handle
Solution Approach 1:
The coupling sleeve transitions from a static rigid connection to a dynamic adjustable connection. The positioning device allows the coupling sleeve to be locked at different positions along the extension rod, enabling the user to adjust and change working portions while maintaining structural strength when locked in position.
3Volume of moving object
If the handle is extended into the coupling sleeve and extension rod for a telescopic structure, then the tool size is reduced when collapsed, but the user cannot grip the coupling sleeve for two-handed operation
Solution Approach 1:
The telescopic structure uses a nested doll principle where the handle is inserted into the coupling sleeve, and the extension rod is inserted into the coupling sleeve, allowing the tool to collapse to a compact size for storage and transport while maintaining the ability to extend to full operational length.
Solution Approach 2:
The coupling sleeve acts as an intermediary component between the handle and extension rod. It provides a gripping surface for two-handed operation while facilitating the telescopic extension and retraction movements, mediating between the compact nested state and the extended operational state.
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 positioning device prevents unexpected loosening and allows users to securely hold the tool with both hands, enabling easy adjustment and operation of the switch controller for locking and releasing, enhancing usability and reliability.
Implementation Method 1
a resilient biasing member pivotally connected to the first rod and pressing against the positioning member
Data Source
AI summary
A telescopic tool includes a positioning device mounted between first and second rods. The first rod includes a first positioning hole, and a first gripping portion. The second rod includes a plurality of second positioning holes, and is movable relative to the first rod to align the first positioning hole with one of the 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 positioning hole and is releasably engaged in one of the 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. A resilient biasing member is pivotally connected to the first rod and pressing against the positioning member.