Telescopic Baton Blade Cam Locking for Stable Extension

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Solution Overview

Problem

Existing telescopic batons are unstable and inconvenient to unlock during extension and withdrawal, leading to poor operational smoothness.

Innovation Solution

A telescopic baton design featuring a blade cam locking assembly with a socket sleeve, blade cam blocks, torsional springs, and an unlocking structure, which includes a positioning plate, screw shaft, lubricating piece, and a switch button, allowing for secure locking and easy unlocking of the baton's tubes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a telescopic baton uses springs to extend the baton body, then the baton is flexible and convenient to use, but it may be withdrawn once under resistance during extension, resulting in poor stability

Engineering Contradiction:
Improveconvenience to useVSAvoidstability during extension
Core Design Contradiction:
Ease of operationVSStability of the object's composition

Solution Approach 1:

The blade cam locking assembly automatically locks the telescopic baton tubes in extended position through the interaction of blade cams and locking grooves without requiring external intervention. The torsion spring provides automatic engagement force, making the system self-servicing for maintaining stability during use.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The locking mechanism transitions from a static spring-based system to a dynamic blade cam system that can adapt between locked and unlocked states. The blade cams rotate to engage or disengage from locking grooves, providing dynamic control over the stability and extension state of the baton.

Inventive Principle:
Principle #15Dynamics

2Device complexity

If a telescopic baton uses a traditional spring mechanism, then the structure is simple, but it is not smooth to operate in the extension process and is inconvenient to unlock

Engineering Contradiction:
Improvestructural simplicityVSAvoidsmooth operation and unlocking convenience
Core Design Contradiction:
Device complexityVSEase of operation

Solution Approach 1:

The locking mechanism is segmented into multiple blade cam blocks, each with its own locking groove engagement point. This segmentation allows for smoother distribution of locking forces and more controlled extension operation compared to a single-point locking mechanism.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The blade cam acts as an intermediary element between the telescopic tubes and the locking grooves. The cam profile translates the extension motion into rotational motion, providing smooth operation and controlled engagement without requiring complex mechanisms.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Stability of the object's composition

If the blade cam locking assembly uses multiple blade cam blocks arranged circumferentially, then the locking stability is improved, but the device complexity increases

Engineering Contradiction:
Improvelocking stabilityVSAvoidlocking assembly complexity
Core Design Contradiction:
Stability of the object's compositionVSDevice complexity

Solution Approach 1:

Multiple blade cam blocks are merged into a single integrated locking assembly that rotates as one unit. The blade cams are positioned circumferentially but share a common rotational axis and engagement mechanism, reducing individual component complexity while maintaining multi-point locking stability.

Inventive Principle:
Principle #5Merging (Combining)

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 ensures the baton remains stable in the extended state and is easy to operate, allowing for smooth extension and withdrawal, enhancing usability for police applications.

Implementation Method 1

both extended ends of the torsional spring are respectively abutted against the socket sleeve and the plurality of blade cam blocks so as to enable the plurality of blade cam blocks to extend in a direction far away from a central axis of the socket sleeve

Methodology Applied
Scientific EffectElasticity: Elasticity

Implementation Method 2

the blade cam locking assembly further includes a lubricating piece, and the lubricating piece is mounted between the blade cam block and the positioning plate

Methodology Applied
Scientific EffectLubrication: Lubrication

Data Source

PatentEP3511669B1Telescopic police baton
Publication Date: 2021.05.05 NEXFLASHLIGHT INDS
  • EP3511669B1 patent drawingFigure 1
  • EP3511669B1 patent drawingFigure 2
  • EP3511669B1 patent drawingFigure 3

AI summary

A telescopic baton is provided. The telescopic baton comprises a plurality of tubes sequentially arranged in an embedded manner, wherein a tube on an inner side of two adjacent tubes in the plurality of tubes is capable of extending and withdrawing along an axis direction of a tube on an outer side of the two adjacent tubes, a locking groove is formed in an inner wall of a first end of the tube on the outer side; a blade cam locking assembly, which comprises a socket sleeve, a plurality of blade cam blocks, a torsional spring and a fixing mechanism, wherein both extended ends of the torsional spring are respectively abutted against the socket sleeve and the blade cam block so as to enable the plurality of blade cam blocks to extend in a direction far away from a central axis of the socket sleeve and to be automatically clamped inside the locking groove; an unlocking structure, which is mounted inside a tube on an outermost side of the plurality of tubes, and is used for unlocking the blade cam locking assembly. By using the telescopic baton of the disclosure, the tube on the inner side of the telescopic baton may be conveniently locked at the first end of the tube on the outer side, so that the extension state of the telescopic baton may be maintained, and the telescopic baton is simple and rapid to operate, good in stability and convenient for the police to use.