Telescoping Baton Cylindrical Shaft Shock Absorbing Assembly
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Solution Overview
Problem
Conventional police batons face issues with difficult deployment due to non-cylindrical shafts that can cause damage and point loading during impact, leading to structural damage and user discomfort.
Innovation Solution
An expandable police baton design featuring a cylindrical shaft with a shock-absorbing assembly comprising C-shaped stop collars and a spring-loaded pin, which prevents rotation and ensures 360-degree contact for enhanced energy absorption and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a non-cylindrical shaft is used to prevent rotation, then the shaft can be locked in position, but the shaft may cause damage to contacted persons and create point loading during impact
Solution Approach 1:
The patent employs a cylindrical shaft design with rounded surfaces instead of flat or angular shapes. This curvature eliminates sharp edges that could cause injury while the cylindrical form factor maintains alignment through the circular cross-section geometry, preventing rotation without creating point loading conditions.
2Stability of the object's composition
If a non-cylindrical shaft is used to prevent rotation, then the shaft can be locked in position, but opening and closing the baton becomes difficult
Solution Approach 1:
The cylindrical shaft with rounded contours allows smoother movement through the sleeve compared to angular shapes. The circular cross-section enables the shaft to rotate freely during deployment and retraction operations, reducing friction and making opening and closing easier while still maintaining alignment when extended.
3Device complexity
If point loading is used at the impact point, then the shock absorbing assembly can be compact, but it creates force on one side causing damage to the baton
Solution Approach 1:
The patent transitions from point loading (zero-dimensional contact) to distributed circumferential loading (one-dimensional contact around the circumference). The cylindrical shaft contacts the shock absorbing assembly along its entire circular perimeter, spreading the impact force across multiple points simultaneously. This dimensional change maintains compactness while eliminating the concentrated force that causes damage.
4Object-affected harmful factors
If a cylindrical shaft is used, then damage risk is reduced and ease of operation improves, but rotation prevention mechanisms are needed
Solution Approach 1:
The patent combines the alignment function with the shock absorbing function into a single integrated mechanism. The cylindrical shaft's circular cross-section inherently prevents rotation while the same cylindrical surface provides distributed contact for shock absorption. This merging of functions eliminates the need for separate rotation prevention features, maintaining simplicity.
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 allows for easier carrying and deployment, reduces damage risk by distributing impact force evenly, and eliminates sharp edges, enhancing user safety and baton durability.
Implementation Method 1
a spring loaded pin to prevent rotation of the shaft within the sleeve
Implementation Method 2
The shock absorbing assembly provides enhanced energy absorption when the shaft is caused by the user to move rapidly to an extended position
Implementation Method 3
two identical 'C' shaped stop collars that comprise the improved stopping shock absorbing assembly
Implementation Method 4
a radial groove proximate an end of the shaft to house a rubber o-ring
Data Source
AI summary
An expandable or telescoping police baton embodies a cylindrical sleeve within which is slidably disposed cylindrical shaft. The sleeve and shaft are aligned with a slot and a pin to prevent rotation of the shaft within the sleeve. The baton also includes a shock absorbing assembly positioned on the shaft.