Roller Deadbolt Lock Dynamics and Curvature

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional door locks for storage rooms and plants lack safety features, as the deadbolt can cause injury due to impact and may get broken, and users can be locked inside unintentionally, requiring improvements to prevent these issues.

Innovation Solution

A roller-type deadbolt lock with a driving member, springs, positioning rods, and a slide mechanism that allows the deadbolt to retract when not in use, preventing impact and ensuring safe operation, along with optional installation of latch bolts and restriction members for enhanced functionality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the deadbolt protrudes beyond the case to prevent door closing, then the door can be stopped from closing, but the deadbolt may cause injury due to impact or get broken

Engineering Contradiction:

Improvedoor stopping functionVSAvoidimpact injury and breakage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The deadbolt is changed from a rectangular shape to a cylindrical roller shape. This curvature eliminates sharp edges and corners that cause impact injury, while the roller design allows it to rotate and retract smoothly, preventing breakage from frequent impact.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The deadbolt is designed to be movable rather than fixed, allowing it to protrude when needed to stop the door and retract when not needed. The roller mechanism enables dynamic adjustment of the deadbolt position, reducing unnecessary impact and potential breakage.

Inventive Principle:

Principle #15Dynamics

2Reliability

If the deadbolt is made rectangular to stop the door, then the door can be effectively stopped, but the rectangular deadbolt may hurt users due to impact

Engineering Contradiction:

Improvedoor stopping functionVSAvoidimpact injury

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The rectangular deadbolt with sharp edges is replaced by a cylindrical roller deadbolt with curved surfaces. This curvature eliminates the harmful sharp edges while maintaining the door-stopping function, as the roller can still protrude to contact the door frame.

Inventive Principle:

Principle #14Spheroidality (Curvature)

3Reliability

If only a deadbolt is provided without latch bolt, then the door cannot be accidentally locked inside, but the door requires pulling to open which affects transportation work

Engineering Contradiction:

Improveprevention of being locked insideVSAvoiddoor opening operation

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The lock system is segmented into separate functional components: a deadbolt for security and a retractable roller for door positioning. The roller can be independently controlled to prevent door closing without requiring the door to be pulled, improving ease of operation while maintaining the prevention of being locked inside.

Inventive Principle:

Principle #1Segmentation

4Reliability

If the deadbolt protrudes beyond the case, then the door can be stopped from closing, but the deadbolt may be broken by frequent impact

Engineering Contradiction:

Improvedoor stopping functionVSAvoiddeadbolt durability

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The fixed deadbolt is replaced with a dynamic roller mechanism that can rotate and retract. This reduces frequent impact by allowing the roller to absorb impact through rotation and by retracting when door stopping is not required, thereby improving durability while maintaining the door-stopping function.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The rectangular deadbolt is replaced with a cylindrical roller, which distributes impact forces more evenly through its curved surface and rotation, reducing stress concentration and preventing breakage from frequent impact.

Inventive Principle:

Principle #14Spheroidality (Curvature)

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 roller-type deadbolt lock enhances safety by preventing injury and breakage, allows easy door opening and closing, and provides versatile locking options without requiring new lock cases, reducing manufacturing and inventory costs for manufacturers.

Implementation Method 1

The first spring biases the inclined surface so that the slide is movable along the first slot

Methodology Applied

Scientific EffectSpring force: Spring

Implementation Method 2

The second spring biases an end face of the insertion member that is located opposite to the roller

Methodology Applied

Scientific EffectSpring force: Spring

Data Source

PatentUS11261619B2Lock with a roller deadbolt

Publication Date: 2022.03.01 FEDERAL LOCK

AI summary

A lock with a roller deadbolt includes a driving member having a first slot and a transverse slot. The driving member is connected to a first spring, a second spring and a positioning rod. A deadbolt includes a body, an insertion member, a roller and a slide. The driving member is connected to the body. The insertion member is received in the body. The second spring biases the insertion member. The slide is restricted by the positioning rods of the driving member and has a first guide pin extending through the first slot. The slide is movable along the first slot. The guide hole includes an extension slot and an inclined slot which inclinedly communicates with the extension slot. When in a non-transmission position, the roller protrudes beyond the receiving space. When in the transmission position, the roller does not protrude beyond the receiving space.