Lock Device Rotary Mechanism Anti-Forced Rotation
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Solution Overview
Problem
Conventional lock devices are vulnerable to unauthorized forced rotation of the outdoor knob or handle, which can lead to damage of the internal structure and compromise the locking mechanism.
Innovation Solution
The lock device incorporates rotary mechanisms with spring-biased followers and a unique tongue-and-cavity system that secures the rotary members to the lock housing, preventing unauthorized rotation of the outdoor handle and protecting the internal structure from damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the dead bolt is firmly or solidly locked and secured to the lock casing, then the locking reliability is improved, but the outdoor knob or handle may be forcedly or brutally rotated by unauthorized persons, leading to damage of the internal structure
Solution Approach 1:
The patent applies the dynamics principle by making the connection between the outdoor handle and rotary member conditional rather than fixed. The tongue-and-cavity system allows the rotary member to be selectively secured to or separated from the lock housing, transforming the static connection into a dynamic, state-dependent connection. When the tongue is disengaged from the cavity, the rotary member can rotate freely with the handle; when engaged, it becomes firmly secured, preventing forced rotation damage while maintaining locking reliability.
2Ease of operation
If the outdoor knob or handle is made rotatable for normal operation, then the ease of operation is improved, but it becomes vulnerable to forced rotation by unauthorized persons
Solution Approach 1:
The patent implements dynamics by creating a variable connection state between the handle and the locking mechanism. The tongue can be positioned to either engage with the rotary member's cavity (securing it) or disengage (allowing free rotation). This dynamic configuration allows the system to switch between operational mode (free rotation for authorized use) and protective mode (secured rotation prevention against unauthorized access), resolving the contradiction between ease of operation and security reliability.
Solution Approach 2:
The tongue acts as an intermediary element between the handle/rotary member and the lock housing. It mediates the connection by selectively engaging with the cavity in the rotary member, thereby controlling whether the rotary member is secured to the lock housing or allowed to rotate freely. This intermediary mechanism enables the system to transition between secured and unsecured states, allowing both easy operation and protection against unauthorized access.
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
Effectively prevents the outdoor knob from being forcibly rotated, thereby safeguarding the lock device from unauthorized access and damage, ensuring secure operation.
Implementation Method 1
two spring-biased followers received and engaged in the chamber of the lock housing and each including a limb for engaging with the protrusion of the rotary member and for allowing the rotary members to be selectively rotated relative to the lock housing with the spring-biased followers
Data Source
AI summary
A lock device includes an actuating lever pivotally engaged in a lock housing for actuating a deadbolt of a latch device, two rotary mechanisms pivotally engaged in the housing and each having a rotary member pivotally engaged in a casing for coupling to an outdoor handle and an indoor handle, and the rotary member of one of the rotary mechanisms is secured to the casing for allowing the rotary member and the casing of the rotary mechanism to be rotated relative to the lock housing with the indoor handle only, and for preventing the outdoor handle from being brutally rotated by the unauthorized persons and for preventing the lock device from being destroyed or damaged by the unauthorized persons.