Integrated Deadbolt And Doorknob Cover for Hands-Free Access

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Solution Overview

Problem

Smart doorknobs that require rotational manipulation can be cumbersome for individuals with limited mobility or physical disabilities, and may be inconvenient when users have their hands occupied, limiting accessibility and ease of use.

Innovation Solution

A hands-free bump knob mechanism that allows users to actuate the lock bolt by pressing towards the door, integrated with an alarm system and authentication module for enhanced accessibility and security.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a rotational knob mechanism is used, then the lock can be actuated, but the operation becomes cumbersome for individuals with limited mobility or physical disabilities

Engineering Contradiction:

Improveease of door accessVSAvoidrotational manipulation requirement

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent replaces the traditional rotational mechanical knob with a push-button mechanism that actuates the lock bolt through linear pressing motion. This substitution eliminates the need for rotational manipulation, making the door access operation simpler and more accessible to individuals with limited mobility or physical disabilities.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

Instead of requiring the user to rotate the knob in a circular motion, the invention inverts the operation to a direct linear push motion. The bump knob is pressed toward the door to retract the bolt, and released to extend the bolt, providing a more intuitive and easier operation.

Inventive Principle:

Principle #13The other way round (Inversion)

2Ease of operation

If a rotational knob is used, then the lock mechanism can be engaged, but it becomes inconvenient when users have their hands occupied

Engineering Contradiction:

Improvehands-free accessibilityVSAvoidadaptability to occupied hands

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The push-button mechanism allows users to operate the lock with minimal hand movement compared to rotational manipulation. Users can press the bump knob with the tip of their finger or the palm of their hand, making it feasible to operate while carrying items or having hands occupied.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The operation requires only a partial pressing motion rather than a full rotational cycle. Users can actuate the lock with a simple push, and the mechanism handles the remaining engagement, reducing the manual effort and space requirements when hands are occupied.

Inventive Principle:

Principle #16Partial or excessive action

3Reliability

If authentication verification is added to the lock system, then security is enhanced, but the operation time increases

Engineering Contradiction:

Improvesecurity authenticationVSAvoidauthentication verification time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The system performs authentication verification before the user needs to operate the lock. By pre-verifying credentials and maintaining authentication state, the system ensures security is established in advance, allowing rapid access when the user presses the bump knob without adding significant delay to the actual door opening operation.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250322706A1Integrated Deadbolt and Doorknob Cover

Publication Date: 2025.10.16 VIVINT LLC

AI summary

A door lock interface may include a door lock plate assembly and a hands-free bump knob supported by the door lock plate assembly. The hands-free bump knob may be communicatively mechanically coupled to a bolt. The bump knob may be configured to (i) retract the bolt into a retracted state when the hands-free bump knob is pressed into an open state and (ii) extend the bolt into a non-retracted state when the hands-free bump knob is released from the open state into a closed state. The integrated door lock may further include an authentication module supported by the door lock plate assembly and communicatively coupled and configured to (i) enable a user to be authenticated, and (ii) prevent the hands-free bump knob from transitioning the bolt from the non-retracted state to the retracted state until the user is authenticated.