Door Handle Protection Structure for Anti-Force Idle Rotation
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Solution Overview
Problem
Existing locksets lack effective measures to prevent damage from unauthorized attempts to break in, leading to potential destruction of the lockset and door handle despite enhanced security features.
Innovation Solution
A violence protection structure for door handles that enters an idle rotation state when locked, creating a false malfunction impression, and engages in a retained state upon excessive force, preventing intentional damage by forming a blocked position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lockset is made more robust to resist burglary, then security performance is improved, but the risk of damage during violent breaking attempts increases
Solution Approach 1:
The patent converts the harmful upward pulling force into a beneficial retained engagement state. When excessive force is applied upward, the spring plate deflects and engages with the positioning member to create a blocked state, transforming the attack vector into a protective mechanism that prevents complete destruction of the lockset.
Solution Approach 2:
The patent applies preliminary anti-action by pre-positioning the spring plate and positioning member to automatically engage and block the handle rotation when excessive upward force is detected. This preemptive mechanism prevents the violent breaking attempt from succeeding before it can cause damage to the lockset components.
2Object-generated harmful factors
If the door handle is made to appear broken during locked state, then false malfunction impression is created, but normal operation may be disrupted
Solution Approach 1:
The patent employs dynamics by creating a conditional state where the handle appears broken only under specific conditions (locked state with upward force). The system dynamically transitions between normal operation and blocked state based on the applied force direction and magnitude, maintaining ease of operation during normal use while creating the false malfunction impression only when needed.
3Reliability
If the spring plate is made to engage under excessive force, then retained state is formed, but the mechanism complexity increases
Solution Approach 1:
The patent merges the spring plate and positioning member into an integrated engagement mechanism. The spring plate serves dual functions: providing the blocking force during normal operation and engaging with the positioning member to create the retained state during violent attempts. This merging reduces the need for separate components and simplifies the overall mechanism while maintaining reliable retained engagement.
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
Prevents intentional damage to the lockset and door handle by creating a false malfunction impression and engaging in a retained state, enhancing security without actual operation disruption.
Implementation Method 1
the lower spring plate forms blocking and will sprung off, if the pressing force is excessively large, to have the door-handle rotating member pressed down
Data Source
AI summary
A door handle violence protection structure includes a base, and a bottom plate having a rotating block, a door-handle rotating member, a positioning member, upper and lower spring plates, and a spring case arranged on the base. The bottom plate includes a trough portion. The bottom plate and the upper and lower spring plates are arranged in a trough portion. The door-handle rotating member is provided with an axle portion and the axle portion extends through the bottom plate and rotatably combined with the spring case, so that the bottom plate is rotatable by means of the handle rotating member. As such, when locked, the bottom plate forms a blocked state and the upper spring plate forms a resisting and pressing member so that the door handle forms an idle rotation state that allows for idle rotation to a predetermined angle but does not cause any operation of the lockset.