Laminated Padlock Lock Core Assembly Position Limiting

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Solution Overview

Problem

The existing laminated padlocks lack a mechanism to accurately limit the position of the cipher wheel, leading to reduced safety performance when adjusting ciphers, as they allow cipher changes without knowing the correct cipher, compromising security.

Innovation Solution

A laminated padlock design featuring a lock core assembly with a large and small frame, lock tongues, and lock cores with rectangular notches and flat end surfaces, which limits the positions of the lock cores and cipher wheels, ensuring accurate cipher adjustment and preventing unauthorized changes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a simple structure that limits the cipher wheel is arranged, then the device complexity is reduced, but the safety performance cannot be completely guaranteed

Engineering Contradiction:

Improvestructure complexityVSAvoidsafety performance

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The lock core assembly is divided into multiple functional components: cipher wheels for code input, lock cores with rectangular notches for position limitation, a large frame with limiting plates and limiting chucks for mechanical constraints, and a small frame with branch plates for additional control. This segmentation allows each component to perform its specific function while working together to achieve both simplicity and high safety performance.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The lock cores act as intermediaries between the cipher wheels and the locking mechanism. The rectangular notches on the lock cores interact with the limiting chucks to precisely control the position of the cipher wheels, ensuring that only the correct cipher configuration can engage the locking mechanism. This intermediary mechanism provides the dual security guarantee without excessive complexity.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If no position limiting mechanism is provided for the cipher wheel, then the ease of operation is improved, but the safety performance is greatly reduced due to unauthorized cipher changes

Engineering Contradiction:

Improvecipher adjustment convenienceVSAvoidcipher adjusting safety

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The limiting plates with limiting chucks and the rectangular notches on the lock cores are pre-configured to prevent unauthorized cipher changes before they can occur. The mechanism is designed so that the lock cores can only be positioned at specific locations corresponding to the correct cipher, and the limiting chucks physically block any attempt to rotate the cipher wheels to incorrect positions. This preliminary constraint ensures security while allowing legitimate operation.

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The mechanism changes the positional parameters of the cipher wheels through the interaction of rectangular notches and limiting chucks. By controlling the possible positions of the lock cores, the system restricts the cipher wheel rotations to only those positions that correspond to the correct cipher code, thereby transforming the operational parameters to ensure both ease of correct operation and prevention of unauthorized changes.

Inventive Principle:

Principle #35Parameter changes

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

This design effectively limits the positions of the lock cores and cipher wheels, preventing incorrect cipher changes and enhancing the safety performance by ensuring that ciphers can only be reset correctly, thus providing dual security guarantees.

Implementation Method 1

one end of the lock beam connected with the laminated padlock body is provided with a lock beam spring; the lock beam expands and contracts up and down to open and close the laminated padlock

Methodology Applied