Locking Hub Extensible Handle Segmented Locking
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Solution Overview
Problem
Existing extensible handle systems, such as those in fishing nets, require inconvenient finger operation for locking and unlocking and often lack a secure connection due to limited overlap between the handle and hub, especially when hands are gloved or wet.
Innovation Solution
A locking hub and extensible handle assembly that allows for easy locking and unlocking by squeezing with a gloved hand, featuring a sliding relationship with significant overlap and multiple locking elements, utilizing a biased push button mechanism and actuator to secure the handle in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a push button connection is used between handle and hub, then the handle can be extended and retracted, but the connection does not feel firm or secure due to short overlap
Solution Approach 1:
The connection system is segmented into multiple locking elements (first and second locking elements) distributed along the handle's length, rather than relying on a single push button connection. This segmentation provides multiple contact points between the handle and hub, creating a more secure connection while maintaining ease of operation through individual locking mechanisms
Solution Approach 2:
The locking elements extend in a direction substantially perpendicular to the longitudinal axis of the handle, creating overlap in a dimensional direction rather than relying solely on longitudinal overlap. This perpendicular extension of locking elements provides firm connection without requiring the handle to be permanently fixed to the hub
2Productivity
If a push button connection is used, then the handle can be quickly locked and unlocked, but it requires specific finger depression that is inconvenient when hands are gloved, wet or the device is moving
Solution Approach 1:
The locking system incorporates resilient elements that provide dynamic, spring-loaded engagement between locking elements and the hub. This resilient connection maintains constant contact pressure, ensuring reliable locking without requiring precise finger pressure, and allows for easy release even with gloved or wet hands through simple squeezing motion
Solution Approach 2:
The resilient elements automatically maintain engagement between the locking elements and hub without requiring continuous user input. Once locked, the system self-maintains the connection through the spring force of the resilient elements, freeing the user's hands and allowing operation even when hands are occupied or in difficult conditions
3Volume of moving object
If the handle is made telescopic for greater reach, then storage and transport are improved, but the connection between handle sections and hub becomes more complex
Solution Approach 1:
The same locking element design serves multiple functions: it locks the telescopic handle sections to each other and also locks the handle to the hub. This universal locking mechanism reduces overall system complexity despite the telescopic configuration, as the fundamental locking principle remains consistent across different application points
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
Enables secure and convenient extension of the handle for improved reach and stability, ensuring a sturdy connection regardless of hand conditions, facilitating easy operation and secure positioning.
Implementation Method 1
a resilient element disposed between the locking element and the hub and engaging the locking element, the resilient element biased to urge the locking element into the aperture
Implementation Method 2
having at least one post that extends into the at least one aperture that extends through the sidewall of the body. The actuator is biased to a first position wherein the at least one post is in a retracted position within the aperture of the body, and the aperture receives the at least one push button
Data Source
AI summary
A locking hub and extensible handle assembly includes a handle having an elongated portion with a stop member at a first end, a grasping portion at an opposed second end, and at least one push button within the handle and proximate the first end. The assembly further includes a hub having a body with a passage extending through the body in a longitudinal direction and slidably receiving the elongated portion of the handle. The assembly also includes an actuator that is movable to permit the push button to be used to lock and unlock the handle relative to the hub.