Motor-Driven Vehicle Door Latch With Integrated Emergency Release
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing motor-driven door latch systems for vehicles require separate components for power child lock and dead lock functions, increasing complexity, weight, and cost.
Innovation Solution
Integration of motor-driven door latch, power child lock, and dead lock functions using a single motor system with auxiliary motors and levers for emergency release and manual operation, allowing for compact and smart door operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate motors and links are used for power child lock and dead lock functions, then reliable door locking and emergency release functions are achieved, but device complexity, weight, and cost increase
Solution Approach 1:
The patent combines the motor-driven door latch, power child lock, and dead lock functions into a single integrated door latch device. The main motor drives a catch mechanism that performs both normal door locking and emergency release functions, while an auxiliary motor provides additional locking capability for power child lock and dead lock modes. This merging eliminates the need for separate motors and links, reducing component quantity while maintaining all required functions.
Solution Approach 2:
The catch mechanism is designed to perform multiple functions: normal door locking, emergency release, power child lock, and dead lock. The auxiliary motor can engage with the catch mechanism to provide enhanced locking for power child lock and dead lock modes. This multi-functionality allows a single integrated system to replace multiple separate components, reducing overall device complexity.
2Reliability
If separate motors and links are used for power child lock and dead lock functions, then complete door locking functions are achieved, but vehicle weight increases
Solution Approach 1:
The patent merges multiple door locking functions into a single integrated device, eliminating redundant motors and mechanical links. The main motor and auxiliary motor share common mounting structures and control systems, significantly reducing the overall weight compared to separate implementations.
Solution Approach 2:
The catch mechanism and auxiliary motor assembly are designed to serve multiple purposes: normal operation, power child lock, and dead lock functions. This multi-functionality eliminates the need for separate heavy-duty mechanisms for each function, reducing overall device weight while maintaining complete door locking capability.
3Reliability
If separate motors and links are used for power child lock and dead lock functions, then comprehensive door locking control is achieved, but manufacturing cost increases
Solution Approach 1:
The patent integrates multiple door locking functions into a single manufacturable unit, reducing assembly complexity and part count. The main motor, auxiliary motor, and catch mechanism are designed as a coordinated system that can be manufactured and assembled more efficiently than separate components, lowering overall manufacturing cost.
Solution Approach 2:
The catch mechanism and auxiliary motor are designed to provide multiple locking functions (power child lock, dead lock, normal locking) through a single integrated assembly. This reduces the need for multiple separate mechanisms, simplifying manufacturing processes and reducing material costs while maintaining comprehensive door locking control.
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 stable door locking and smooth release, enhanced safety through emergency release mechanisms, and reduced component count, improving vehicle marketability by reducing weight and complexity.
Implementation Method 1
A door locking and releasing part applies torque to the catch part through a main motor to allow the catch part to be locked to or released from the striker
Implementation Method 2
A motor-driven emergency door releasing part is provided with an auxiliary motor and contacted with the door locking and releasing part by the operation of the auxiliary motor
Implementation Method 3
a pressurizing spring applying an elastic force to the master locking link in order to rotate the master locking link in a direction
Data Source
AI summary
A motor-driven door latch for a vehicle includes a catch part which is caught on a striker mounted on the vehicle. A door locking and releasing part includes a main motor and applies torque to the catch part through the main motor to allow the catch part to be locked to or released from the striker. A motor-driven emergency door releasing part is provided with an auxiliary motor and is contacted with the door locking and releasing part. An inside emergency operating lever is connected with an inside handle installed at the door for the vehicle. An outside emergency operating lever is connected with an outside handle installed at the door for the vehicle. A manual emergency door release part is connected with the inside emergency operating lever.