Quick-Draw Flashlight End Cap Locking for Fast Secure Access

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Solution Overview

Problem

Small flashlights secured with lanyards or clips are cumbersome and difficult to quickly access in emergency situations, leading to poor user experience due to non-removable attachments.

Innovation Solution

A quick-draw assembly structure featuring a main housing with a sleeve, locking member, and end cap, utilizing through holes, retaining members, and magnetic members for secure and rapid detachment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a non-removable lanyard or clip is used to secure the flashlight, then the flashlight is prevented from being lost, but the flashlight becomes cumbersome and difficult to quickly access in emergency situations

Engineering Contradiction:
Improveprevention of lossVSAvoidquick access
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The attachment system is divided into separable components: a mounting groove in the flashlight body, a mounting post on the end cap, and a detachable locking mechanism with retaining members. This segmentation allows the flashlight to be securely attached when needed while enabling quick separation when rapid access is required, resolving the contradiction between loss prevention and quick access.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The locking mechanism transitions from a static non-removable attachment to a dynamic system where the end cap can be quickly locked and unlocked. The spring-loaded retaining members automatically engage with the mounting post when attached and can be quickly disengaged by pressing the release button, providing both secure attachment and rapid access capability.

Inventive Principle:
Principle #15Dynamics

2Reliability

If a non-removable attachment is used, then the flashlight is securely fixed, but the attachment structure becomes complex and cumbersome

Engineering Contradiction:
Improvesecure attachmentVSAvoidattachment structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The complex locking mechanism is extracted and integrated into a compact end cap assembly that attaches to the flashlight body. The retaining members, spring, and release button are consolidated within the end cap, creating a self-contained locking system that provides secure attachment without adding significant complexity to the overall flashlight structure.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The locking mechanism components are nested within the end cap structure. The retaining members are housed within the end cap body, the spring is contained within the same space, and the release button operates from the exterior while actuating internal components. This nesting minimizes the overall complexity and space required for the secure attachment system.

Inventive Principle:
Principle #7Nested doll (Nesting)

3Ease of operation

If a quick-release mechanism is implemented, then rapid access is enabled, but the security of attachment may be compromised

Engineering Contradiction:
Improverapid accessVSAvoidattachment security
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The retaining members are pre-positioned within the locking mechanism, ready to automatically engage with the mounting post when the end cap is attached. The spring is pre-compressed to provide immediate locking force upon attachment, ensuring secure fixation without requiring additional locking actions from the user, thus maintaining both security and rapid access capability.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The locking mechanism is self-actuating through the spring-loaded retaining members that automatically engage with the mounting post when the end cap is attached. The system serves itself by using the attachment motion to trigger the locking action, eliminating the need for separate locking steps while ensuring secure attachment, and allows quick release through the simple button press that releases the self-locking mechanism.

Inventive Principle:
Principle #25Self-service

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 quick disassembly and secure attachment of the flashlight, preventing loss and enhancing user experience in emergency situations.

Implementation Method 1

a first magnetic member is fixedly provided within the mounting post, and a second magnetic member fixedly is provided within the mounting groove

Methodology Applied
Scientific EffectMagnetic attraction: Magnetism

Data Source

PatentUS12516797B1Quick-draw assembly structure and flashlight
Publication Date: 2026.01.06 LI WENJIE
  • US12516797B1 patent drawing
  • US12516797B1 patent drawing
  • US12516797B1 patent drawing

AI summary

A quick-draw assembly structure and a flashlight are provided. The structure includes: a sleeve is slidably mounted on a main housing; a locking member is disposed at an end of the main housing, a mounting groove is provided at an end of the locking member away from the main housing, and a plurality of through holes are circumferentially arranged around the locking member, the through holes are corresponded to a location of the mounting groove, and a retaining member is slidably mounted within each of the through holes; an end cap, the end cap comprises a mounting post configured to be inserted into and removed from the mounting groove, the mounting post comprises a locking groove corresponded to the through holes, and the locking groove is engaged with the retaining member along a predetermined arcuate surface; the end cap further includes a connecting member.