Door Guard Assembly With Dampening Spring
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Solution Overview
Problem
Existing door guard assemblies are vulnerable to attacks by intruders, as they rely on the strength and integrity of anchor points secured with woodscrews, which can be dislodged by force, such as kicking or shoulder charging, leading to inadequate security against unauthorized entry.
Innovation Solution
A door guard assembly featuring a slidable plate and an elongate member with a dampening means, such as a resiliently deformable spring, that absorbs impact and limits door opening, providing enhanced resistance to forced entry by engaging the outer surface of the elongate member when activated, thus preventing further opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional anchor points secured with woodscrews are used, then the door guard assembly can be easily manufactured and installed, but the resistance to intruder attacks is insufficient as the screws can be dislodged by force
Solution Approach 1:
The patent applies beforehand cushioning by incorporating a dampening means (spring mechanism) that is pre-installed in the door frame to absorb impact forces before they can dislodge the anchor points. This cushioning mechanism is activated in advance to protect the woodscrews from being knocked out by intruder attacks, thus resolving the contradiction between maintaining easy installation and improving attack resistance.
2Reliability
If a chain door guard is used to limit door opening, then security against unwanted entry is provided, but the device offers no protection against forced entry attacks
Solution Approach 1:
The patent combines the chain door guard security function with a beforehand cushioning mechanism. The dampening means is pre-positioned in the door frame to absorb impact forces that would otherwise compromise the anchor points. This allows the device to maintain its reliability for limiting door opening while simultaneously protecting against the harmful factor of forced entry attacks.
3Device complexity
If woodscrews are used to secure anchor points, then the device structure is simple and cost-effective, but the anchor points can be dislodged by applying force to the partially opened door
Solution Approach 1:
The patent maintains structural simplicity by keeping the woodscrew anchor points but adds a dampening means (spring mechanism) that is integrated into the existing door frame structure. This cushioning element absorbs impact forces before they can dislodge the anchor points, thereby protecting the structural simplicity while improving the integrity of the anchor points against forced entry attacks.
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 solution significantly increases resistance to intruder attacks by absorbing applied forces and reducing potential damage to the door and frame, while also simplifying activation with a slidable plate mechanism, offering improved security and ease of use compared to traditional door guard assemblies.
Implementation Method 1
the elongate member and/or the first part and/or the second part further comprise a dampening means; and, wherein the dampening means is capable of absorbing an impact for that is applied to the door whose opening has been limited in this way
Implementation Method 2
the dampening means comprises one or more resiliently deformable body/bodies; Preferably the resiliently deformable body/bodies is/are chosen from the group comprising one or more spring(s)
Data Source
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AI summary
A door guard assembly is provided comprising: a first part that is attachable to a door; a second part that is attachable to a door frame; an elongate member; a slidable plate that comprises a receiving means; wherein the first part and/or the second part and/or the elongate member further comprise(s) a dampening means; and, wherein the elongate member is attached to the first part or the second part and in use can be engaged with the receiving means of the plate located on the other first or second part respectively when the plate is slid into an operating position such that the receiving means engages the outer surface of the elongate member as the door is opened and the receiving means and elongate member thus limit the opening of the door, and the dampening means absorbs an impact force that may be applied to the door whose opening has been limited in this way.