Piston Stop Shock Absorption for Simulation Gun Durability

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Solution Overview

Problem

Simulation guns face durability issues due to impact on the piston mechanism during air current ejection, which is not effectively addressed by existing solutions that complicate the mechanism and require expensive materials.

Innovation Solution

A shock-absorption device is introduced, comprising a piston stop and a coil spring between the piston stop and the cylinder, allowing the piston stop to move relative to the piston mechanism and absorb impact forces, thereby reducing kinetic energy and enhancing durability without significant changes to the existing mechanism.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a piston mechanism is used to eject air current to fire a bullet, then the simulation gun can achieve firing function, but impact force is generated causing durability problems

Engineering Contradiction:
ImprovedurabilityVSAvoidimpact force
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

A shock-absorption means (coil spring or rubber cushion) is provided in advance between the piston stop and cylinder to cushion the impact force that occurs when the piston mechanism operates. This beforehand cushioning prevents direct impact transmission to the cylinder and piston stop, thereby improving durability without changing the basic piston mechanism structure.

Inventive Principle:
Principle #11Beforehand cushioning (Prior cushioning)

2Object-affected harmful factors

If existing shock-absorption solutions are implemented, then impact can be reduced, but the mechanism structure becomes complicated

Engineering Contradiction:
Improveimpact forceVSAvoidmechanism structure
Core Design Contradiction:
Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The shock-absorption function is extracted as a separate component (shock-absorption means) positioned between the piston stop and cylinder. This extraction allows the basic piston mechanism to remain simple while adding a dedicated shock-absorption element that does not interfere with the core firing function.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

A piston stop is introduced as an intermediary component between the piston and cylinder, with the shock-absorption means positioned between them. This intermediary structure absorbs impact forces while allowing the piston mechanism to maintain its original simple structure and firing function.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Reliability

If expensive materials are used for colliding members, then durability can be improved, but material cost and machining complexity increase

Engineering Contradiction:
ImprovedurabilityVSAvoidmaterial cost and machining
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The shock-absorption means (particularly the rubber cushion option) uses inexpensive, easily manufactured materials to absorb impact forces. This approach protects more expensive components like the cylinder and piston from damage, effectively extending their service life without requiring expensive materials for the shock-absorption component itself.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

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 shock-absorption device effectively attenuates impact on the piston mechanism, improving durability and allowing for reduced size and weight of the bolt, while maintaining the simplicity of the existing structure.

Implementation Method 1

the shock-absorption means is a coil spring provided to be arranged between a spring holder in the cylinder and the piston stop

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentEP3296681B1Shock-absorption device of piston mechanism in simulation gun
Publication Date: 2021.04.07 TOKYO MARUI
  • EP3296681B1 patent drawingFigure 1
  • EP3296681B1 patent drawingFigure 2
  • EP3296681B1 patent drawingFigure 3A~3C

AI summary

[Task] To attenuate impact applied to a piston mechanism portion and improve durability in a simulation gun in which an air current is ejected by an operation of the piston mechanism portion to fire a bullet. [Solution] In a simulation gun in which an air current is ejected by an operation of a piston mechanism portion to fire a bullet, a piston stop 50 which is movable relative to a piston mechanism portion 15 is provided, the piston stop is attached to one constituent member of the piston mechanism portion to absorb an impact force accompanying the operation of the piston mechanism portion, and shock-absorption means 57 is provided between the piston stop and the other constituent member of the piston mechanism portion.