Intrusion Detector Lookdown Actuator Mechanism

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Solution Overview

Problem

Existing intrusion detectors require complex disassembly and risk losing masking components when disabling or enabling the lookdown function, exposing internal circuitry and posing a risk of misplacement.

Innovation Solution

An intrusion detector design featuring a hingedly mounted door and actuator system that allows for the lookdown function to be enabled or disabled without disassembling the device, using a pivot mechanism to mask or unmask the motion sensor relative to the lookdown window, allowing for easy operation without exposing internal components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a black label or rubber band is used to mask the lookdown window or mirror, then the lookdown function can be disabled, but the detector must be fully disassembled and reassembled, and the masking component may be lost

Engineering Contradiction:

Improvelookdown function controlVSAvoiddisassembly and reassembly operation

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The door assembly with masking element is nested within the detector housing, with the masking element integrated into a movable door structure that pivots between masked and unmasked positions. This eliminates the need to store masking components externally and prevents loss while maintaining ease of operation.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The door assembly serves dual functions: it provides the masking capability to disable the lookdown function while also serving as the structural component that eliminates the need for separate masking components. The integrated design makes the system self-sufficient, removing the need for external storage of masking elements.

Inventive Principle:

Principle #25Self-service

2Reliability

If a black label or rubber band is used to mask the lookdown window or mirror, then the lookdown function can be disabled, but internal circuitry is exposed during disassembly

Engineering Contradiction:

Improvelookdown function controlVSAvoidexposure to internal circuitry

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The door assembly is pre-integrated into the detector housing with the masking element positioned to cover the lookdown window or mirror when in the masked position. This preliminary integration ensures that the masking function is built-in from the start, eliminating the need to open the housing and exposing internal circuitry during operation.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If the lookdown function is disabled using external masking components, then the function can be turned off, but the components must be stored outside the detector

Engineering Contradiction:

Improvelookdown function controlVSAvoidmasking component

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The door assembly serves multiple functions: it provides the masking capability to disable the lookdown function, serves as a structural component of the detector housing, and eliminates the need for separate masking components. This multi-functionality integrates the masking element permanently within the detector, preventing loss.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

Enables seamless switching of the lookdown function without exposing the circuitry or risking loss of masking components, ensuring reliable operation and user convenience.

Implementation Method 1

The motion detectors may use infrared and/or microwave signals to detect motion proximate the detector

Methodology Applied

Scientific EffectInfrared radiation detection: Infrared Radiation

Implementation Method 2

The motion detectors may use infrared and/or microwave signals to detect motion proximate the detector

Methodology Applied

Scientific EffectMicrowave radiation detection: Microwave Radiation

Data Source

PatentUS8912902B1Lookdown enable/disable for detectors

Publication Date: 2014.12.16 RESIDEO LLC

AI summary

An intrusion detector comprises a housing including a cover and baseplate mounting a circuit board. The cover and baseplate are removably mountable to a base. A motion sensor and bracket are mounted to the circuit board. The cover has a lower lookdown window. A lookdown enable/disable actuator extends from a rear side of the circuit board and is accessible through the baseplate. The actuator is operable to move a door pivotally mounted to the bracket between an on position to enable a lookdown function and an off position to disable the lookdown function. The detector is normally mounted on a wall by securing the base to the wall. The cover and baseplate can be removed from the base. A screwdriver can be used to turn the actuator. The cover and baseplate can then be remounted to the base.