Telescopic Crowbar Locking Structure for Adjustable Reach
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Solution Overview
Problem
Conventional crowbars have a fixed length, limiting their usability when the distance between objects or nails exceeds the bar's length, necessitating the purchase of additional sizes, increasing costs and reducing practicality.
Innovation Solution
A telescopic crowbar with a mounting sleeve, adjusting module, and extending rod, allowing for adjustable length adjustment via an engaging element that interacts with positioning recesses on the extending rod, enabling easy length adjustment without needing multiple tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional crowbar with fixed length is used, then the structure is simple and easy to manufacture, but the adaptability is poor when the distance between objects exceeds the bar's length
Solution Approach 1:
The crowbar is divided into a mounting sleeve and an extending rod that can be separated and reconnected at different positions. The extending rod has multiple positioning recesses that can engage with the mounting sleeve at different locations, allowing the crowbar to be segmented and reconfigured for different working distances.
Solution Approach 2:
The crowbar transitions from a static fixed-length structure to a dynamic adjustable-length structure. The extending rod can be extended or retracted relative to the mounting sleeve, and the positioning recesses provide discrete adjustable positions, enabling the crowbar to adapt its length dynamically according to working conditions.
2Adaptability or versatility
If multiple crowbars of different sizes are purchased to cover various distances, then the adaptability improves, but the cost increases
Solution Approach 1:
A single crowbar design serves multiple functions by allowing the extending rod to be positioned at different lengths. The universal mounting sleeve can accommodate the extending rod at various positions, replacing the need for multiple specialized crowbars of different fixed lengths.
Solution Approach 2:
The extending rod can be stored within or alongside the mounting sleeve when not in use, creating a compact configuration. The telescopic design allows one component to nest within another, reducing the number of separate tools needed.
3Adaptability or versatility
If a telescopic structure with multiple components is implemented, then the adaptability improves, but the ease of operation deteriorates due to complex adjustment mechanisms
Solution Approach 1:
The extending rod features self-aligning positioning recesses that automatically engage with the mounting sleeve when the rod is inserted to the desired length. The user simply needs to insert the rod and it will naturally lock into position without requiring complex locking mechanisms or multiple adjustment steps.
Solution Approach 2:
The positioning recesses act as intermediaries between the extending rod and mounting sleeve, providing simple engagement points that facilitate easy adjustment. These recesses serve as the interface that enables straightforward length adjustment without complex mechanisms.
Data Source
AI summary
A telescopic crowbar has a mounting sleeve, an adjusting module, and an extending rod. The adjusting module is connected to the mounting sleeve and has a body, a pressing element, an engaging element, and a returning element. The body is connected to the mounting sleeve and has a limiting recess. The extended rod engages with the adjusting module, extends into the mounting sleeve, and has an inserting end, a working end, and at least two positioning recesses. The at least two positioning recesses are formed on an external surface of the extending rod at a spaced interval between the inserting end and the working end of the extending rod. The engaging element selectively engages with one of the at least two positioning recesses via the limiting recess to hold the extending rod firmly on the mounting sleeve.