Door Locking Device with Rotatable Member and Protrusion

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Solution Overview

Problem

Existing door locking mechanisms are cumbersome to operate and can pose safety hazards by impeding quick access and egress, violating safety codes and potentially allowing unauthorized access during emergencies.

Innovation Solution

A door locking device featuring a rotatable handle, a rotatable member, a catch, and a protrusion that lifts the member when engaged with the catch upon handle rotation, allowing for quick and secure locking and unlocking.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional locking mechanisms are used, then security is provided, but operation becomes cumbersome and safety is compromised

Engineering Contradiction:

ImprovesecurityVSAvoidoperation speed

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The locking mechanism is divided into separate functional components: a handle assembly for user interaction, a rotatable member for motion conversion, a catch for securing, and a protrusion for actuation. This segmentation allows each component to perform its specific function efficiently, enabling quick operation while maintaining security.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The mechanism uses dynamic motion conversion where rotational movement of the handle is transformed into linear movement of the protrusion through the rotatable member. This dynamic transformation enables rapid actuation of the locking and unlocking functions, improving operation speed without compromising the reliability of the secure locked state.

Inventive Principle:

Principle #15Dynamics

2Reliability

If traditional locking mechanisms are used, then security is provided, but activation delay allows unauthorized access

Engineering Contradiction:

ImprovesecurityVSAvoidactivation time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The mechanism is designed so that the locking components are pre-positioned and ready for immediate actuation. The protrusion is spring-loaded or pre-tensioned to engage the catch instantly when the handle is rotated, eliminating activation delay and preventing unauthorized access during emergencies.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The direct mechanical linkage through the rotatable member and protrusion allows the locking action to occur in a single rapid motion without intermediate steps or delays. The mechanism rushes through the locking sequence in one continuous action, minimizing activation time while ensuring secure engagement.

Inventive Principle:

Principle #21Skipping (Rushing through)

3Reliability

If complex locking mechanisms are used, then security is enhanced, but device complexity increases

Engineering Contradiction:

ImprovesecurityVSAvoidmechanism complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Multiple functions are merged into a compact mechanism: the handle serves as both the user interface and the actuator, the rotatable member combines motion conversion and transmission, and the protrusion integrates both the actuating element and the locking trigger. This merging reduces the number of separate components while maintaining security functionality.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

Each component performs multiple functions: the handle assembly provides both user interaction and mechanical actuation; the rotatable member converts motion and transmits force; the catch serves as both the securing element and the engagement target. This multi-functionality reduces overall device complexity while maintaining reliable security.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11505966B2Locking device to secure a door and methods for installing and operating the locking device

Publication Date: 2022.11.22 CROSSER JAMES EDWARD

AI summary

A device for securing a door including a rotatable handle affixed to the door, a rotatable member affixed to the door, a catch, and a protrusion from the rotatable handle that is configured to lift the member when the member is engaged with the catch and the rotatable handle is rotated.A device for securing a door including a member configured to be rotatably attached to the door, a catch configured to be attached to a wall adjacent to the door and to receive the member, and a protrusion configured to be attached to a handle on the door and to lift the member when the member is in a closed position and the handle is rotated.A method for installing a device for securing a door with a handle, the method including affixing a member to the door so that the member can rotate, affixing a catch to a wall adjacent the door, the catch configured to receive the member, and affixing a protrusion to the handle, the protrusion configured to lift the member when the member is engaged with the catch and the handle is rotated.