Smart Door Lock Projection Module for Safe Opening
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Solution Overview
Problem
Conventional smart door locks with thick and heavy door panels pose a risk of injury due to unknown rotation ranges, as users may accidentally collide with the door panel during opening.
Innovation Solution
A smart door lock device with a projection module that projects a safe door opening range image on the ground using a light-emitting unit and optical cover, allowing users to determine the door panel's rotation range and potential obstacles before opening, featuring a handle-linked light projection system and optional distance sensing units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the door panel is made thick and heavy to achieve anti-theft and sound insulation effects, then security and sound insulation are improved, but the risk of user injury increases due to unknown rotation range
Solution Approach 1:
The projection module projects the rotation range image onto the ground before the user opens the door, providing advance warning of the door panel's movement path. This preliminary visual information allows users to adjust their position and avoid injury while maintaining the thick door panel's security benefits
2Reliability
If the door panel is made thick and heavy to achieve sound insulation effect, then sound insulation is improved, but the rotation range becomes harder to control and predict
Solution Approach 1:
The projection module acts as an intermediary between the heavy door panel and the user, providing visual information about the rotation range. This mediator helps users understand and control the door's movement behavior without changing the door panel's physical properties
3Object-affected harmful factors
If a projection module is added to indicate rotation range, then user safety is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical range-indication mechanisms with an optical projection system. Instead of using mechanical linkages or physical indicators, the system uses a light source and optical cover to project the rotation range image, simplifying the overall device structure while achieving the same safety function
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 user injury by providing a clear indication of the door panel's rotation range and any obstacles, enabling safe and smooth operation by projecting a light beam image on the ground, thus enhancing user safety and convenience.
Implementation Method 1
The light-emitting unit is disposed within the lamp holder and aligned with the mounting hole. The light-emitting unit projects a light beam to the at least one light-transmissible part
Implementation Method 2
After the light-emitting unit projects a light beam to the at least one light-transmissible part, the light beam is transmitted through the at least one light-transmissible part
Data Source
AI summary
A smart door lock device is installed on a door panel. The smart door lock device includes a base, a handle and a projection module. The base is combined with the door panel. The handle is installed on the base. The projection module is installed on the base. A safe door opening range image corresponding to a rotation range of the door panel can be projected on a ground by the projection module.