Pistol Frame Assembly with Internal Lock Lever

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Solution Overview

Problem

Existing frame assemblies for pistols require replacement of the entire frame when the rail part is damaged, and exposed assembly screws are prone to corrosion and contamination.

Innovation Solution

A frame assembly design featuring a lower frame with a mounting projection and an upper frame with a mounting groove and lever hooking hole, where the upper frame is locked using a lock lever with an elastic spring, and the assembly is secured by a coupling screw from the inside, preventing external exposure and facilitating strong assembly without separate screws.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the fixing pin and assembly screw penetrate the side of the lower frame to fix the upper frame, then the upper frame can be securely fixed to the lower frame, but the fixing pin and assembly screw are exposed to the outside, creating a risk of contamination or corrosion by the external environment

Engineering Contradiction:

Improvesecure fixation of upper frame to lower frameVSAvoidcontamination or corrosion of exposed screws

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

Instead of penetrating the lower frame from the outside, the coupling screw is inserted from the upper frame's inner side and secures the assembly from the interior, inverting the traditional fastening direction to protect fasteners from external exposure

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The coupling screw acts as an intermediary element that connects the upper and lower frames from the interior, mediating the fixation function while remaining protected from external environmental factors

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of manufacture

If the fixing pin and assembly screw are used to fix the upper frame, then the frames can be assembled, but the exposed screws can be lost or damaged

Engineering Contradiction:

Improveassembly of upper and lower framesVSAvoidprotection against loss or damage of assembly screws

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The coupling screw is inserted from the interior of the upper frame rather than from the outside, inverting the fastening approach to ensure the screw remains protected and cannot be accidentally lost or damaged

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The upper frame's structure itself provides the pathway for the coupling screw, making the assembly process self-contained and eliminating the need for separate external fastening operations that could lead to screw loss

Inventive Principle:

Principle #25Self-service

3Ease of operation

If the lower frame and upper frame are designed to be easily assembled, then assembly is simplified, but the frames may be easily and arbitrarily separated

Engineering Contradiction:

Improveease of assembly of lower and upper framesVSAvoidresistance to arbitrary separation of frames

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

The frame assembly is divided into separable upper and lower frames that can be easily assembled and disassembled, while the coupling screw provides secure fixation to prevent arbitrary separation

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The frame assembly allows for dynamic assembly and disassembly operations through the coupling screw mechanism, enabling easy maintenance and replacement while maintaining security during normal use

Inventive Principle:

Principle #15Dynamics

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 easy and strong assembly of the lower and upper frames, preventing corrosion and random disassembly, while allowing various frame size combinations and eliminating the need for external screws, ensuring secure and durable pistol frame assembly.

Implementation Method 1

the other end that is elastically supported to project upward by an elastic spring

Methodology Applied

Scientific EffectElastic spring: Spring

Data Source

PatentUS11624571B1Frame assembly for pistol with lock lever

Publication Date: 2023.04.11 DASAN MACHINERIES

AI summary

A frame assembly for a pistol with a lock lever. The frame assembly includes a lower frame having a grip and an upper frame assembled on the lower frame and to a slide. The lower frame has: a mounting projection projecting upward to face the upper frame; and a lever mounting unit separated from the mounting projection and projecting upward. The upper frame has: a mounting groove into which the mounting projection is inserted to face the lower frame, and a lever hooking hole at one side of the mounting groove. The lever mounting unit has a lock lever having one end locked to be rotatable by a lock pin and the other end elastically supported to project upward. When the upper frame is assembled to the lower frame, the other end of the lock lever is inserted into the lever hooking hole and the upper frame is locked.